Deep soft soil roadbed composite structure and construction method

Abstract

The embodiment of the invention provides a deep soft soil roadbed composite structure and a building method. The roadbed structure sequentially comprises a first soft soil layer, a second soft soil layer, geotechnical cloth, a broken stone cushion layer, a block stone layer, a gravel cushion layer, a cement stabilized broken stone layer, a cement mortar bonding layer and a surface layer composite material plate from bottom to top. In addition, the roadbed composite structure further comprises drainage blind ditches, water collecting wells, drainage plates, micro piles and drainage ditches. The roadbed structure comprehensively adopts principles and technologies of dynamic consolidation drainage, rigid support and a flexible surface layer, and dynamic consolidation drainage comprises a vertical drainage system and a horizontal drainage system. The rigid supporting effect of the micro piles can improve the bearing capacity of soft soil and reduce the deformation of an upper-layer structure of a roadbed. The surface layer composite material plate has good toughness and strength, and the service life of the surface layer is prolonged. The bearing capacity and stability of the soft soil roadbed structure can be effectively improved, and important technical support is provided for soft soil area roadbed design, building, management and maintenance and the like.

Description

technical field [0001] The present application relates to the technical field of soft soil roadbed, in particular, to a composite structure and construction method of deep soft soil roadbed. Background technique [0002] Soft soil roadbed refers to a kind of roadbed built in areas with large water content such as wetlands and lakes. Generally speaking, soft soil roadbed has high water content, high porosity, low strength, low permeability, weak bearing capacity, large compression deformation, and is easily affected by environmental factors, so soft soil has very unfavorable effects on road construction. influences. The distribution of soft soil in my country is very wide, and it is widely distributed in the downstream deltas, inland basins and river banks of the plains and coastal areas. [0003] At present, the treatment methods for soft soil subgrade mainly include: dynamic compaction method, replacement filling method, consolidation drainage method, etc. The dynamic co...

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Problems solved by technology

The above-mentioned treatment method is relatively simple, and the treatment effect on the deep soft soil layer is not good, and the overall stability of the deep soft soil subgrade cannot be well guaranteed

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