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Construction method of pipe-jacking engineering

A construction method and technology of pipe jacking engineering, applied in earthwork drilling, wellbore lining, tunnel lining, etc., can solve the problems of developing thixotropic mud, achieve the effect of reducing the number of use, convenient and efficient monitoring of pressure

Active Publication Date: 2020-09-22
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is no thixotropic mud developed for the sections whose formation lithology is dominated by loess-like light silty loam, loess-like medium, heavy silty loam, and loess-like medium-silty loam, and has no effect on concrete Pipe joints are not coated with wax and baked with fire before use, and pressure gauges are not installed on the main pipe and branch pipes for pressure monitoring at any time to complete the pipe jacking project construction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The construction method of the pipe jacking project comprises the following steps:

[0042] Step 1, configure thixotropic mud for drag reduction;

[0043] Step 2, arranging grouting holes and connecting grouting pipes;

[0044] Step 3, select the screw pump as the grouting pump;

[0045] Step 4, apply wax on the surface of the pipe joint and bake it with fire to make the paraffin completely melt into the concrete surface of the pipe joint;

[0046] Step 5, grouting to the grouting hole;

[0047] Step 6, measure during jacking;

[0048] Step 7, set the water stop at the exit of the hole.

[0049] Further, configuring the thixotropic mud for drag reduction in Step 1 includes: Step 1.1, mixing bentonite, soda ash, water, and hydroxymethyl cellulose in the following proportions by weight: 130 parts of bentonite, 4.5 parts of soda ash, 870 parts of water, hydroxymethyl cellulose Mix 4 parts of methylcellulose and stir evenly;

[0050] Step 1.2, put the stirred slurry i...

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Abstract

The invention discloses a construction method of pipe-jacking engineering. The construction method comprises the steps that thixotropic slurry for resistance reducing is prepared; grouting holes are arranged, and grouting pipelines are connected; a screw pump is selected as a grouting pump; the surfaces of pipe joints are waxed and are baked by fires, and wax is completely molten into the concretesurfaces of the pipe joints; grouting is carried out on the grouting holes; measuring is carried out in the jacking process; and waterstop arrangement is achieved before pipe-jacking discharging. Thethixotropic slurry is developed by aiming at the formation lithology adopting loess light silt loam, loess medium and heavy silt loam and loess medium silt loam as the main part, and therefore jacking resistance is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of large-diameter long-distance pipe jacking construction, in particular to a construction method for pipe jacking engineering. Background technique [0002] Pipe jacking construction is to use the jacking equipment to push the tool pipe or roadheader from the working pit (originating shaft) through the soil layer to the receiving pit (arriving shaft), relying on the drilling system installed at the head of the pipe to continuously Cut soil chips, the excavation system will discharge the cut soil chips, while jacking, cutting, and conveying, the pipeline is laid forward section by section, and at the same time, the pipeline following the tool pipe or roadheader is buried in two A trenchless construction technique between pits. In recent years, the development trend of pipe jacking construction is rapidly moving towards the direction of large diameter and ultra-long distance. [0003] For example, the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10C04B28/00C04B28/02C04B111/00
CPCE21D9/00E21D9/001E21D9/003E21D11/105C04B28/001C04B28/02C04B2111/00146C04B22/10C04B24/383C04B18/08
Inventor 陈亮辉牛留坡李祥张品崔棋
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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