{"id":665,"date":"2022-09-14T11:55:47","date_gmt":"2022-09-14T03:55:47","guid":{"rendered":"https:\/\/jpcintan.com\/?p=665"},"modified":"2024-05-13T16:35:22","modified_gmt":"2024-05-13T08:35:22","slug":"trenchless-technologies","status":"publish","type":"post","link":"https:\/\/jpcintan.com\/?p=665","title":{"rendered":"Trenchless Technologies In Vitrified Clay Pipes"},"content":{"rendered":"<div class=\"wp-block-ub-content-toggle wp-block-ub-content-toggle-block\" id=\"ub-content-toggle-block-c776d0c8-2fa8-4c34-a091-760ec7602437\" data-mobilecollapse=\"false\" data-desktopcollapse=\"false\" data-preventcollapse=\"false\" data-showonlyone=\"false\">\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-0313367a-f61b-4f2c-a228-e76b9712d9e7\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-0-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHY USE TRENCHLESS INSTALLATION WITH VCP?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-0-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>The reasons for selecting a trenchless installation method vary greatly by project, but a few of the most common reasons include: cost of surface restoration, water tables and depth of installation. When a project calls for a trenchless installation method, the Pilot Tube Method is frequently preferred because of the reliably rifle barrel straight line and grade.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-6fc0e821-6072-411d-a753-0f53da9edb24\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-1-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHY USE TRENCHLESS INSTALCAN BENDS BE INVOLVED (I.E- 45-DEGREE BENDS) IN THE PILOT TUBE METHOD OF GUIDED BORING (PTM), OR IS THIS METHOD ONLY USED FOR STRAIGHT RUNS?LATION WITH VCP?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-1-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Pilot tube guided boring is for straight runs only. Changes in alignment are managed at shafts\/ manhole connections.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-b815ec08-5eab-4bdf-8391-d8b802750280\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-2-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT IS THE PRICE DIFFERENCE BETWEEN PILOT TUBE (TRENCHLESS) METHOD &amp; OPEN CUT INSTALLATIONS?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-2-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>This would depend on soil type, water table, cover depth, other utilities above the bore, and surface restoration needs. Trenchless methods are sometimes the LESS costly installation method depending on these factors.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-50ab9822-3dc1-42ae-b46c-f471959c152f\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-3-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>CAN THIS METHOD BE USED FOR TRUNK MAIN INSTALLATION?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-3-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Yes. Pilot tube is commonly used in the conventional form up to 48-inch outside diameters. Larger sizes can be accomplished with a hybrid system (ex. Horizontal auger boring or pipe ramming using a pilot tube to create the guided path first).<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-ac06041a-ebd2-4824-8df1-0af308ad821e\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-4-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>CAN YOU DEFLECT THIS TYPE OF PIPING?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-4-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Yes, but it would limit the safe jacking force which could be applied. VCP jacking pipe and the joint have been tested using the standard deflection and shear load test for Bell &amp; Spigot pipe. While there is no indication that trenchless installations suffer from differential settling, this may be a benefit in limited seismic events or when adjacent utilities are accessed.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-b520df02-00db-44c6-8e05-4acdc4bfc054\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-5-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>DOES THE CLAY PIPE USED IN MICRO-TUNNELLING HAVE BELL &amp; SPIGOTS?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-5-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>No. VCP jacking pipe (VCP-J) has flush joints per ASTM C1208. The pipe end is machine-ground and joined by Stainless Steel (316) collars that are recessed from the barrel OD.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-b3ec2c7f-a296-40d5-9103-805771bc2f17\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-6-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>HOW CAN VCP BE USED IN TRENCHLESS INSTALLATIONS?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-6-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Vitrified Clay Jacking Pipe has been the predominant pipe material used in the Pilot Tube Method (PTM) process due to the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Its high compressive strength<\/li>\n\n\n\n<li>A low-profile zero-leakage joint<\/li>\n\n\n\n<li>Availability in the typical 1- or 2-meter pipe lengths<\/li>\n\n\n\n<li>Elimination of the external casing pipe.<\/li>\n<\/ul>\n\n\n\n<p>Vitrified Clay Pipe has an extremely high compressive strength (18,000 psi average), a feature that makes it uniquely suited to endure the high jacking forces generated as the pipe is pushed through the ground.<\/p>\n\n\n\n<p>In addition to the Pilot Tube Method, Vitrified Clay Pipe has been used for Slurry Microtunneling, Pipe Bursting, and Sliplining.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-cc090e8c-af56-41b7-b420-fb5388944aa5\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-7-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>HOW IS THE DIRT REMOVED IN FRONT OF THE PILOT HEAD?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-7-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>The 4-inch pilot tube with slant faced steering head displaces the soil. No soil is removed in this step.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-de6caf81-8050-417c-8c6d-b65026d73884\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-8-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>IF A WATER TABLE IS ENCOUNTERED, HOW DO YOU DEAL WITH IT?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-8-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Up to a 10 ft water head above the bore when in flowable type soils can be balanced using a water auger or double-flighted augers.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-a926144c-07be-480b-ba12-9fe11d9aad05\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-9-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT DO YOU DO IF A PIPE BREAKS DURING INSTALLATION?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-9-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>This is extremely uncommon with pilot tube guided boring installations. If the pipe section is in the installed tunnel, it could be cycled out. Sometimes a jacking frame misaligns within the shaft and could cause a pipe to break in the shaft. If this happens, an experienced contractor will remove the pipe before it is fully in the tunnel, and the frame is re-aligned and tack welded before tunnelling resumes.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-1fa8a796-eef6-4891-bfc6-ec9d1ea2f9ce\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-10-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT HAPPENS WHEN YOU RUN INTO HARD ROCK DURING THE AUGURING PROCESS?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-10-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Hard rock would be found in step 1 during the installation of the pilot tubes and before the casings and augers are employed. If inappropriate geotechnical conditions are encountered in step 1, the pilot tubes can be retracted, and a different alignment or grade can be chosen for the bore path.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-f00fcff4-caad-48ce-a6ec-44f78738740a\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-11-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT IS THE AVERAGE ADVANCEMENT SPEED OF EACH STAGE?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-11-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>This varies greatly depending upon soil conditions, contractor experience and the selection of the two step or three step process. A rough average for a 300 ft. drive is one week:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Day one for setup<\/li>\n\n\n\n<li>Day 2 for installation of the pilot tubes<\/li>\n\n\n\n<li>Days 3 through 5 for installation of temporary casings and\/or product pipe<\/li>\n<\/ul>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-47c9461f-034b-4a2d-a2b8-9b958096bac1\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-12-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT IS THE MAXIMUM THRUST YOU HAVE APPLIED SO FAR?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-12-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>We have seen 250 tons applied to an 8-inch jacking pipe line (rated at 45 tons with a 2.5 SF) without failure (but they were very careful about keeping the pipe in straight alignment)!<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-5331d8e1-9015-46cf-b063-f93cb559e9bc\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-13-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT IS THE MAXIMUM DEPTH AT WHICH THE PILOT TUBE METHOD HAS BEEN USED?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-13-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>The Pilot Tube Method has been used at cover depths of over 50 ft. But this is not a limit.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-04559701-f225-4072-9b8d-ea63ed130d22\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-14-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT IS THE MAXIMUM LENGTH OF A RUN MADE USING THE PILOT TUBE METHOD?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-14-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>The world record for a PTM drive is almost 700 ft. The most-common lengths are 300-350 ft. (roughly the full length of an American football field).<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-ab8338af-0608-4f91-b8d1-df3bf46dc69a\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-15-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT SIZE AND MATERIAL TYPE BOULDER WOULD PILOT TUBE GUIDED BORING WORK AND IS THERE ANY IMPROVEMENT IN TECHNOLOGY OVER THE YEARS AS TO RIM CUTTING BOULDERS?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-15-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>Boulders and other \u2018mixed face\u2019 conditions are tough for most trenchless new installation tunnel methods. If the pilot can get past the cobble or boulder, the auger could transport a size up to 1\/3 of the casing diameter. Pilot tube is evolving into non-displaceable soils using rock tooling in the place of the slant faced steering head. This is currently being used in homogeneous \u2018soft\u2019 rock.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-038e0a1e-b066-4e03-aa88-3b78612eba1f\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-16-c776d0c8-2fa8-4c34-a091-760ec7602437\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-c776d0c8-2fa8-4c34-a091-760ec7602437\" style=\"color: #000000; \"><strong>WHAT HAPPENS TO THE WOOD RING AT THE JACKING PIPE JOINT OVER TIME?<\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down open\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"true\" class=\"wp-block-ub-content-toggle-accordion-content-wrap\" id=\"ub-content-toggle-panel-16-c776d0c8-2fa8-4c34-a091-760ec7602437\">\n\n<p>The wood (compression) rings are made from particle board or chipboard and are located within the joint between each section of jacking pipe. These are thrust transfer rings that are designed to transmit the axial jacking forces between pipe sections. These compression rings are required for installation only and are not needed for joint integrity after jacking operations. The rings are sacrificial and will deteriorate in a sanitary environment. They will be replaced with \u2018silting\u2019 of fine sediment during the service life. This silting will provide a smooth linear flow across the joint.<\/p>\n\n<\/div>\n\t\t<\/div>\n<\/div>\n\n\n<p style=\"font-size:15px\"><em>Article posted in <strong>NCPI<\/strong> official website:<br><a href=\"https:\/\/www.ncpi.org\/faqs\/trenchless-technologies-using-vc-jacking-pipe\/\" target=\"_blank\" rel=\"noopener\"><strong>https:\/\/www.ncpi.org\/faqs\/trenchless-technologies-using-vc-jacking-pipe\/<\/strong><\/a><\/em><br><\/p>\n\n\n\n<p><br><br><br><br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The reasons for selecting a trenchless installation method vary greatly by project, but a few of the most common reasons<\/p>\n","protected":false},"author":1,"featured_media":666,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[100],"tags":[119,110,120,101,118],"class_list":["post-665","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vcp-industry-info","tag-clay","tag-ncpi","tag-pipes","tag-trenchless","tag-vitrified"],"featured_image_src":"https:\/\/jpcintan.com\/wp-content\/uploads\/2022\/09\/header-trenchless.jpg","author_info":{"display_name":"WebAdmin","author_link":"https:\/\/jpcintan.com\/?author=1"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/posts\/665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jpcintan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=665"}],"version-history":[{"count":5,"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/posts\/665\/revisions"}],"predecessor-version":[{"id":1025,"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/posts\/665\/revisions\/1025"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jpcintan.com\/index.php?rest_route=\/wp\/v2\/media\/666"}],"wp:attachment":[{"href":"https:\/\/jpcintan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jpcintan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jpcintan.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}