A drainage system and drainage method for expressway reconstruction and expansion construction

Abstract

The invention discloses a drainage system and a drainage method for expressway reconstruction and expansion construction. A torrent trough is set up on the old highway, a temporary water blocking ridge is set, and a diversion pipeline is laid at the same time; the rainwater is made to flow along the top notch of the torrent trough. Flow down into the rush trough, and flow to the drainage ditch through the diversion pipeline; use the anchor rod to fix the steel wire mesh on the slope of the old road, and make the steel mesh cover the top notch and the opening of the trough of the rush trough; A new road will be built on the top surface of the road. After the new road is built, foam light soil will be filled in the rush flow tank and diversion pipeline. The invention avoids roadbed erosion, water damage and other diseases caused by poor drainage during the highway reconstruction and expansion project construction period, ensures the construction quality of highway reconstruction and expansion, and adopts a steel wire mesh covering structure, which can ensure the stable fusion of old and new highways The foaming light soil with high fluidity is filled in the diversion pipeline and the drainage system is saved, and the implementation is simple, the structure is stable, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of highway reconstruction and expansion engineering, and more specifically relates to a highway reconstruction and expansion construction drainage system and a method for drainage and later backfilling in the construction process. Background technique [0002] With the advancement of science and technology and the rapid development of the economy and society, people's living standards continue to improve, and high-speed travel is becoming more and more frequent. It is necessary to expand road traffic capacity to meet people's travel needs. Expansion on the basis of the original expressway lane not only saves cost, but also tests the technology. Due to the low rapid drainage capacity of the expressway, when heavy rainfall occurs during the construction period, a large amount of water will appear on the road surface of the expressway. Timely discharge will greatly affect the construction progress. [0003] Th...

AI Technical Summary

Problems solved by technology

[0006] (1) The drainage system needs to be dismantled after the pavement construction is completed, and it cannot be directly integrated into the construction system of the expressway, which wastes a lot of manpower and cost;

[0007] (2) Part of the drainage system will be left in the built expressway because it cannot be dismantled, burying hidden dangers to the safety and stability of the overall system of the expressway;

[0008] (3) The structure of the drainage system is complicated, which increases the workload of construction

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