Expansive soil (rock) roadbed retaining swelling-reducing structure and construction method thereof

Abstract

The invention discloses an expansive soil (rock) roadbed retaining swelling-reducing structure and a construction method thereof. The roadbed retaining swelling-reducing structure comprises a lateral ditch, a lateral ditch platform, an inverted filter, a swelling-reducing water draining layer, a breast board, a plate top concrete platform and a water draining hole, wherein the lateral ditch is a U-shaped lateral ditch; the lateral ditch platform is horizontally arranged at an edge of the lateral ditch; the inverted filter, the swelling-reducing water draining layer and the breast board are vertically arranged on the lateral ditch platform and are successively arranged on the exterior of the expansive soil (rock) from inner to outer; the plate top concrete platform is horizontally poured on the swelling-reducing water draining layer, the inverted filter and the expansive soil (rock); and the swelling-reducing water draining layer is arranged as an elastic elastomer. The construction steps are as follows: constructing the lateral ditch after completing the cutting earth rock excavation and stay pile construction; constructing the lateral ditch platform and leveling the plate bottom concrete; hoisting the breast board, mounting the breast board while paving the swelling-reducing water draining layer and the inverted filter; and constructing the plate top concrete platform. The expansive soil (rock) roadbed retaining swelling-reducing structure has the advantages of water draining function, obvious swelling-reducing effect, excellent water draining effect, convenience in construction and easily controlled quality.

Description

technical field [0001] The invention relates to the technical field of subgrade geotechnical engineering, in particular to an expansive soil (rock) subgrade retaining and expansion-reducing structure with remarkable swelling-reducing effect, good drainage effect, convenient construction and easy quality control and a construction method thereof. Background technique [0002] Expansive soil (rock) is widely distributed in my country. Because expansive soil (rock) has the characteristics of water absorption expansion, dehydration shrinkage and cracking, repeated expansion and contraction deformation, water immersion bearing capacity attenuation, and dry shrinkage crack development, it is easy to cause damage to the retaining structure. The slope cracks and soaks in water and softens, which in turn leads to subsidence of the subgrade, muddying of the subgrade bed, slope erosion, collapse, collapse, landslide and other diseases, which seriously affect the safety of road traffic an...

AI Technical Summary

Problems solved by technology

When designing the retaining wall and pile-slab wall structure, due to the low mechanical strength index of expansive soil (rock), poor engineering properties, and large expansion force caused by water absorption, the thickness of the retaining wall obtained through checking and calculation is large, and the cross-section of the anchor pile Large, long pile length, resulting in large masonry support structure, resulting in large engineering investment in expansive soil (rock) areas

[0003] At present, the bagged sand and gravel filter layer used for filter drainage at the back of the retaining structure wall is quite difficult to construct due to the use of stacked construction, especially when the retaining wall is high, and there is a lack of reliable quality inspection standards, resulting in reverse The quality of the filter layer project is poor, the drainage on the back of the wall is not smooth, and there is even a phenomenon that soil is used as sand and gravel, which does not achieve the expected drainage purpose and easily causes damage to the retaining project

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