A municipal road subgrade drainage structure and its construction method

Abstract

The invention discloses a roadbed drainage structure for a municipal administration road. The roadbed drainage structure comprises a high-elevation road segment and a low-elevation road segment. A intercepting drain is formed in the position of a slope toe of the high-elevation road segment, and a seepage-proof composite geomembrane is laid at the bottom of the intercepting drain; a layer of gravel is laid at the position, close to the high-elevation side, of the bottom of the intercepting drain; a baffle is arranged at the position, 30 cm away from the inner wall of the high-elevation side, in the intercepting drain; and a water suction pipe is further arranged in the intercepting drain. The invention further provides a construction method of the roadbed drainage structure. By the adoption of the roadbed drainage structure and the construction method of the roadbed drainage structure, a roadbed perched water problem is solved, meanwhile, the normal procedure of roadbed compaction is not affected, and it is guaranteed that the construction schedule is not affected.

Description

technical field [0001] The invention relates to the technical field of municipal road engineering, in particular to a municipal road embankment drainage structure and a construction method thereof. Background technique [0002] During the construction of municipal roads, when the topographic height difference of new roads changes greatly, the soil located on higher terrains will accumulate water in the soil due to factors such as rainfall, and will slowly pass through the interior of the soil layer due to the terrain difference and flow into the In the soil layer of lower terrain, the construction of low-lying subgrade soil is affected, and municipal roads are different from ordinary roads, especially for roads located in the center of the city. There are mostly enterprises and buildings on both sides of the road, and there is no side slope. The accumulated water cannot be discharged from the side slopes by traditional methods. If it cannot be removed in time, it will often ...

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Problems solved by technology

[0002] During the construction of municipal roads, when the topographic height difference of new roads changes greatly, the soil located on higher terrains will accumulate water in the soil due to factors such as rainfall, and will slowly pass through the interior of the soil layer due to the terrain difference and flow into the In the soil layer of lower terrain, the construction of low-lying subgrade soil is affected, and municipal roads are different from ordinary roads, especially for roads located in the center of the city. There are mostly enterprises and buildings on both sides of the road, and there is no side slope. The accumulated water cannot be discharged from the slopes on both sides by traditional methods. If it cannot be removed in time, it will often cause diseases such as subgrade settlement in the later stage, which will seriously affect the road quality.

[0003] The traditional method of dealing with subgrade water seepage is often to set up blind ditches to drain the water through the lateral slope, or to naturally seep out all the high-level water and dry the low-level subgrade soil before compacting the subgrade. However, there is often no such method for municipal roads. For side slopes, the method of draining to both sides of the road is not applicable and the process is complicated. The method of natural infiltration takes a long time and is not suitable for rainy areas. It is possible that new rainwater will infiltrate before the upper stagnant water is drained.

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