Construction method of underground water through cut of railway in desert area

Abstract

A construction method for railway groundwater cuttings in desert areas, characterized in that: (1) using crawler excavators to excavate the cuttings to 0.3m above the groundwater level; (2) reducing the groundwater level by combining well points and drainage ditches on both sides; (3) , Use Larsen steel sheet piles to protect the fine sand on both sides, prevent the fine sand from collapsing, excavate underground water blind ditch pits, and construct underground drainage systems such as underground water blind ditch; 1m below the elevation and carry out tamping, the cutting base and subgrade bed are replaced and compacted; (5) Slope brushing and protection of the cutting side slope. The beneficial effect of the present invention is: the construction method of the railway underground water cutting in the desert area of ​​the present invention mainly solves the technical problem of precipitation during the excavation of the road cutting and the construction of underground drainage facilities when the road cutting is built in the desert area and the groundwater is abundant. In the process of dewatering, the well point is used for dewatering, which effectively solves the technical problem of avoiding the collapse of powder and fine sand during the excavation of the foundation pit.

Description

technical field [0001] The invention relates to the technical field of railway embankment construction, in particular to a construction method for railway underground water cuttings in desert areas. Background technique [0002] my country is one of the countries with a large number of deserts. The total area of ​​deserts is about 1.3 million square kilometers, accounting for about 13% of the country's land area. The Inner Mongolia area is the most concentrated area of ​​desert in my country. Although the surface of this type of area is covered by desert, the underground water system is rich. During the construction of railways in this type of area, it is often encountered that the groundwater level in the cutting is higher than the shoulder elevation of the railway design. In view of this situation, groundwater road cuttings are formed. During the construction process, there were problems such as difficulty in precipitation and easy collapse of excavated road cuttings. The...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a solution to the technical problem of how to rationally carry out underground water cutting construction under the condition of difficult precipitation and easy collapse of the excavated roadbed in the process of underground water cutting construction in desert areas. When the groundwater level is close to the groundwater level, excavation by skipping is adopted, the combination of well point dewatering and drainage ditch dewatering, steel sheet pile protection, and cutting base replacement are taken to ensure that groundwater The construction quality of cuttings, ensuring the stability of the subgrade, and ensuring the construction method of railway groundwater cuttings in desert areas without disease

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