Large diameter jacking pipe resistance reduction construction method under miscellaneous filling soil geology condition

Abstract

The invention relates to a large diameter jacking pipe resistance reduction construction method under a miscellaneous filling soil geology condition. The large diameter jacking pipe resistance reduction construction method under the miscellaneous filling soil geology condition includes following steps: S101, excavating a soil body in front of a tube jacking machine so as to form a groove, whereintwo parts of the soil body are left on two parts, corresponding to side portions of the tube jacking machine, of two sides of the formed groove, and another part of the soil body is left on the part,corresponding to the bottom of the tube jacking machine, of the bottom of the formed groove; S102, after the groove is formed, moving the tube jacking machine forward for performing tunneling operation, and constructing to a position at a safe distance from the front end of the groove; and S103, repeating the step S101 and the step S102 until the tube jacking machine passes through a miscellaneousfilling soil area. The large diameter jacking pipe resistance reduction construction method under the miscellaneous filling soil geology condition reduces jacking resistance of the tube jacking machine by adopting the mode of forming the groove in front of the tube jacking machine in advance, and due to the fact that miscellaneous filling soil has large interspaces and is not compact, the miscellaneous filling soil on the periphery of the groove is scattered after the groove is formed by excavating the soil body, and the tube jacking machine can easily tunnel forward, and greatly reduces thefrication resistance.

Description

technical field [0001] The invention relates to the field of pipe jacking construction engineering, in particular to a drag reduction construction method for large-diameter pipe jacking under the condition of miscellaneous fill land. Background technique [0002] At present, during pipe jacking construction, methods such as waxing and grouting are used to reduce friction, but waxing and grouting are auxiliary measures to reduce friction, and the effect is not obvious. Especially in the case of miscellaneous fill land, the method of simple grouting is not suitable. Since the miscellaneous fill is formed by filling concrete blocks and construction waste, the gap is large. During pipe jacking construction, grouting to the outside of the segment , the slurry lubricating film cannot be formed, and all the injected slurry flows into the voids of the miscellaneous fill, so it is difficult to achieve the effect of lubrication and drag reduction. Therefore, it is urgent to provide a...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, to provide a large-diameter pipe jacking drag reduction construction method in the case of miscellaneous fill soil, and to solve the problem that the existing grouting method cannot form a mud lubricating film in the miscellaneous fill soil area. To the problem of the effect of lubrication and drag reduction

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