Construction method for guiding slurry and pulling pipe

Abstract

The invention discloses a construction method for guiding slurry and pulling a pipe. The construction method includes the following steps: A, connecting the top of a reamer bit and a guide drilling rod, and connecting the tail of the reamer bit and the pipe; B, using the guide drilling rod to align a position to be constructed, starting the reamer bit, using the guide drilling rod to perform guidance, using the reamer bit to cut soil and discharge slurry into the pipe, and expanding a drilled hole into a finished hole once; and C, separating the reamer bit from the pipe after the pipe is pulled, discharging the slurry out of the pipe, and leaving the pipe in the hole. According to the construction method, the pipe expanded hole is mall, the drilled hole can be expanded into the finished hole once, the working load is less, the efficiency is high, elevation control is accurate, and construction can be easily performed in a bad geology.

Description

[0001] 【Technical field】 [0002] The invention relates to a construction method for slurry-guiding and pulling pipes, and belongs to the technical field of pipeline construction. [0003] 【Background technique】 [0004] In the construction of sewage pipelines, areas with poor geology and dense buildings are often encountered. In order to reduce the impact on existing roads and surrounding buildings, non-excavation construction is generally adopted. Non-excavation construction includes pipe jacking, directional drilling and other processes. Larger working wells and receiving wells are required, and the construction has a greater impact. The pipeline is composed of short pipe joints, which are prone to settlement and leakage. In the event of nose sinking or obstacles during pipe jacking construction, skylights need to be opened. The directional drilling process does not require working wells and receiving wells, and the pipelines are integrally connected, which is easy to avoid...

AI Technical Summary

Problems solved by technology

[0006] 1. The reaming of the pipe should be more than two levels larger than the outer diameter of the pipe, and the settlement of the multi-stage reaming drill bit will cause the pipe elevation to be inaccurate;

[0007] 2. The workload of reaming is large and the efficiency is low;

[0008] 3. It is difficult to drag the pipe in quicksand geology, and special mud wall protection must be adopted;

[0009] 4. The pipe floats in the borehole, the friction between the upper part and the hole wall is large, the drag pipe resistance is large, and the pipe drag distance is short;

[0010] 6. During the process of dragging the pipe, the surrounding soil is greatly disturbed, which may easily cause ground subsidence and house cracking

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