Construction method of high-speed railway fill subgrade in soft soil area

Abstract

The invention discloses a construction method of a high-speed railway filling subgrade in a soft soil area, comprising the following steps: (1) cleaning and leveling the original ground; (2) constructing the rigid piles within the influence line of construction load: after the site is cleaned and leveled and the subgrade is qualified upon inspection, constructing the rigid piles within the influence line of construction load; (3) reinforcing the soil mass between the toe and the influence scope line of the load for a compound subgrade; (4) constructing the bearing plate on a pile board structure; (5) laying a gravel cushion and a high-strength geogrid; after the construction of compound subgrade treatment measures on the bearing plate on the pile board structure and both sides, laying a mattress layer; (6) after the compound subgrade is qualified upon inspection, constructing the light foam concrete within the filling range. The invention may ensure the construction quality of the high-speed railway filling subgrade in the soft soil area, guarantee the reliability of construction of subgrade filling materials, guarantee the stability of the subgrade and qualified post-constructionsettlement of the subgrade, and guarantee the beneficial effect of no defect generated by the subgrade.

Description

technical field [0001] The invention belongs to the technical field of high-speed railway embankment construction, in particular to a construction method for filling embankments of high-speed railways in soft soil areas. Background technique [0002] The construction of high-speed railway is the need for rapid economic development and a substantial increase in railway transportation capacity. It is one of the important signs of a country's development. Developed countries such as Japan, France, and Germany have built relatively efficient railways in the 19th century. The beautiful high-speed rail network is particularly effective in promoting economic development and urbanization along the high-speed rail. my country began to study high-speed railway technology in the 1890s, and began large-scale construction and operation in 2004. Up to now, the operating mileage of high-speed railways that have been completed and opened to traffic in my country is nearly 30,000 kilometers....

AI Technical Summary

Problems solved by technology

If the subgrade site is designed using conventional methods, the filling improvement process is complicated and has a great impact on the surrounding environment. At the same time, the filling load increases, and the additional stress increases, resulting in deeper foundation treatment depth and increased foundation treatment costs.

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