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Thixotropic slurry anti-drag material for pipe jacking and preparation method thereof

A thixotropic mud, effective technology, applied in the field of concrete materials, can solve problems such as polluting the environment, affecting traffic, and high project cost, achieving broad application prospects and reducing jacking resistance

Active Publication Date: 2014-12-24
CHINA FIRST HIGHWAY ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the development of urban construction, domestic small and medium-diameter drainage pipes cannot meet the needs of urban drainage and flood discharge, and the demand for long-term planning of large-diameter drainage infrastructure is increasingly reflected. Traditional slotting construction damages roads, affects traffic, pollutes the environment, and lowers project costs. The disadvantages such as high and high safety hazards are gradually replaced by trenchless construction technology. Pipe jacking construction is a commonly used method in trenchless construction.

Method used

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  • Thixotropic slurry anti-drag material for pipe jacking and preparation method thereof
  • Thixotropic slurry anti-drag material for pipe jacking and preparation method thereof
  • Thixotropic slurry anti-drag material for pipe jacking and preparation method thereof

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Embodiment Construction

[0017] The bentonite described in the present invention is a third-class product of sodium bentonite, the pH of water is 7, and the degree of substitution of CMC is 0.9. Experiments have found that the degree of substitution has little influence on the effect of frictional resistance; soda ash is Class I.

[0018] The present invention will be specifically described below in conjunction with the examples, but the present invention is not limited to the following examples. The present invention provides 2 embodiments, respectively numbered 1-2, and their matching ratios and measured frictional resistance are shown in Table 1. In order to illustrate the effect, 2 comparisons of ordinary mud ratios are listed, numbered respectively as Pu 1-2.

[0019] The pipe-soil friction resistance is measured by the on-site pre-embedded steel bar stress gauge.

[0020] Table 1 Proportion of thixotropic mud

[0021]

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Abstract

The invention relates to a thixotropic slurry anti-drag material for pipe jacking and a preparation method thereof, belonging to the field of pipe jacking construction. The thixotropic slurry anti-drag material for pipe jacking is prepared by uniformly mixing and stirring bentonite, additives and water, wherein the bentonite is sodium bentonite; the additives are sodium carboxymethyl cellulose (CMC) and sodium carbonate; and the thixotropic slurry anti-drag material for pipe jacking comprises sodium bentonite, water, CMC and soda ash in a mass ratio of 1:10:(0.01-0.02, 0.04):(0.03-0.04). The invention is characterized in proportioning of the thixotropic slurry; no research in the proportioning of the thixotropic slurry has been done in China at present, and the proportioning in construction is completely determined by experience and is not supported by test data; and the test engineering practice prove that the invention can greatly reduce the jacking resistance, and has positive meanings for the development of pipe jacking engineering.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to a material of thixotropic mud for pipe jacking and a preparation method thereof. Background technique [0002] With the development of urban construction, domestic small and medium-diameter drainage pipes cannot meet the needs of urban drainage and flood discharge, and the demand for long-term planning of large-diameter drainage infrastructure is increasingly reflected. Traditional slotting construction damages roads, affects traffic, pollutes the environment, and lowers project costs. The disadvantages of high construction and high potential safety hazards have been gradually replaced by trenchless construction technology, and pipe jacking construction is a commonly used method in trenchless construction. [0003] The pipe jacking construction method is to use the jacking force of the main jacking cylinder and the relay room to push the roadheader from the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 崔占奎李文靳志强赵振华孙鹤明陈胜亮富铮
Owner CHINA FIRST HIGHWAY ENG CO LTD
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