Combined structure for abrupt slope road bed of rapid transit railway

Abstract

A combined structure for an abrupt slope road bed of a rapid transit railway is characterized by being strong in integrity, good in stability, firm and durable and favorable for high speed vehicle running. The combined structure comprises reinforced concrete piles (10), L-shaped reinforced concrete structures (20) and road bed filling bodies (30), wherein the reinforced concrete piles (10) are horizontally arranged in two rows along the road bed and longitudinally arranged at intervals along the road bed, the L-shaped reinforced concrete structures (20) extend along the road direction and are arranged on pile tops of the reinforced concrete piles (10) to be fixedly connected with the reinforced concrete piles (10), and the road bed filling bodies (30) are filled on the inner side of the L-shaped reinforced concrete structures (20). The combined structure for the abrupt slope road bed of the rapid transit railway has the advantages of being strong in integrity, good in stability, firm, durable, small in rail deformation and the like, favorable for high speed vehicle running, and capable of greatly reducing maintenance work amount. Construction technology is simple, can effectively reduce building cost, meets environment protection requirements and has wide application and popularization prospects.

Description

technical field [0001] The present invention mainly relates to the structure of steep slope subgrades such as railways and highways, and particularly relates to steep slopes in mountainous areas with thicker distributed soil layers on the surface, so as to avoid large horizontal deformation of the lower support structure of the subgrade, large settlement of steep subgrade soil layers and Composite foundation is used to deal with the composite structure structure of high-speed railway steep slope roadbed which is difficult to construct. Background technique [0002] At present, a large number of high-grade roads in mountainous areas of our country have begun to be built, and there are more and more steep slope roadbeds. High-speed railways put forward new requirements for high smoothness, stability, and durability of the line, and have strict restrictions on the total settlement of the subgrade foundation, post-construction settlement and differential settlement. [0003] Th...

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Problems solved by technology

[0003] The following problems exist in the traditional steep slope subgrade structure. The lower support structure of the subgrade is set on the steep slope subgrade. Due to the large horizontal deformation of the lower support structure, it is often necessary to install reinforced concrete piles with longer pile lengths and larger pile cross-sections to meet the requirements of high-speed railways; The surface soil layer of the steep slope subgrade is thicker, and the settlement of the foundation without treatment is large and does not meet the requirements of the high-speed railway. It is difficult to construct the composite foundation treatment, and there is uneven lateral subsidence of the subgrade; Second, the cost is too high

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