Construction method of excavated roadbed of high-speed railway in deep artificial spoil area

Abstract

The invention discloses a construction method of an excavated roadbed of a high-speed railway in a deep artificial spoil area. The method is characterized by comprising the following steps: step A, leveling the land of a site; step B, excavating artificial spoil in a layered mode, and carrying out slope brushing; step C, carrying out dynamic compaction on a cutting foundation base; step D, constructing a slope surface protection project of the arched framework of the cut slope; step E, constructing a cast-in-situ bored pile; step F, constructing a cast-in-situ bored pile top joist; step G, filling roadbed foundation bed filler; and step H, carrying out construction of affiliated structures of the cutting section. The construction method has the beneficial effects that the construction quality of the excavated roadbed in the deep artificial spoil area can be ensured, the stability of the side slope and the foundation of the artificial spoil cutting roadbed is ensured, the post-construction settlement of the foundation can be effectively controlled, the reliability of roadbed filling construction is ensured, and no disease is generated in the subsequent operation of the roadbed.

Description

technical field [0001] The invention belongs to the technical field of foundation reinforcement for special unfavorable geological conditions of railways, and in particular relates to a construction method for digging subgrades of high-speed railways in deep artificial spoil areas. Background technique [0002] High-speed railway is the precious crystallization of human civilization and wisdom, and an important symbol and strong support for the modernization of human society. At present, China's high-speed railway has established a relatively complete operation and management system, which has ensured the continuous safety of operation, achieved good business performance, provided safe, fast, comfortable and economical transportation services, and effectively promoted the sound and fast economic and social development. develop. After the opening of the high-speed railway, the freight capacity of the existing railway corridor has been greatly released, laying a solid foundat...

AI Technical Summary

Problems solved by technology

The artificial spoil has a short time of formation, and has not been compacted. It has the physical characteristics of large porosity, loose soil, and low foundation bearing capacity. The general and single foundation reinforcement measures cannot meet the relevant requirements of the code.

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