Construction method for permanently protecting existing pipeline during road reconstruction

Abstract

The invention discloses a construction method for permanently protecting an existing pipeline during road reconstruction, which comprises the following specific steps of: firstly, performing lofting on site according to the pipeline position of a water supply steel pipe, breaking a pavement structure hard layer, and inserting and driving steel sheet piles on two sides of the water supply steel pipe along the safety distance range of the pipeline; secondly, erecting a plurality of top anchoring supports on the upper portions of the steel sheet piles on the two sides in the length direction, then excavating foundation pits in the outer sides of the steel sheet piles on the two sides, and pouring side walls and cover plates on the outer sides of the steel sheet piles on the two sides; then, backfilling the foundation pit, pulling out the steel sheet piles, and filling gaps of the steel sheet piles by tracking grouting; and finally, covering the side walls on the two sides with prefabricated cover plates, and completing pipeline protection culvert construction of the water supply steel pipe. By the adoption of the method, disturbance to soil around the pipeline can be avoided, the requirement for water and soil conservation of the special pipeline is met, the span of the cover plate culvert and backfill materials in the culvert can be reduced to the maximum extent, and the construction cost is greatly saved.

Description

technical field [0001] The invention relates to the technical field of road reconstruction, in particular to a construction method for permanently protecting existing pipelines during road reconstruction. Background technique [0002] At present, in the process of new urban roads or renovation of old roads, the protection of existing pipelines under the roads, such as figure 1 As shown, the conventional method is to excavate the soil around the pipeline by grading to expose the pipe body, build side walls outside the safe distance of the pipe body, add a cover plate, and use the structure of the cover plate culvert to bear the road structure load and vehicle load and surrounding soil pressure. [0003] However, when the protected pipe has special requirements (such as high-pressure main water supply pipe) and the soil within a certain safe distance around the pipe cannot be disturbed, this method will cause the span of the cover plate to increase, the stress on the cover pl...

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Problems solved by technology

[0003] However, when the protected pipe has special requirements (such as high-pressure main water supply pipe) and the soil within a certain safe distance around the pipe cannot be disturbed, this method will cause the span of the cover plate to increase, the stress on the cover plate to increase, and the structure Many unfavorable factors such as large structural size have a great impact on structural safety and project cost

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