Construction method for long-distance box culvert with shallow covering soil penetrating through railway yard

By dividing long-distance box culverts into jacking sections and cast-in-place sections, and using temporary beam structures to suspend railway lines, construction was achieved without interrupting railway operations under shallow overburden conditions. This solved the problem of integrating urban roads and railway stations and provided a new construction method.

CN120797731APending Publication Date: 2025-10-17CHINA RAILWAY SHANGHAI DESIGN INST GRP CO LTD
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Patent Information

Application Number
CN202510867420.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Existing technologies, when crossing existing railway stations, face limitations in rotation construction due to high-rise buildings. The required thickness of the soil cover for tunnel boring machines results in long road lines with poor landscape integration, and the length of the underpass section and the elevation of the existing road surface are difficult to connect smoothly.

Method used

The long-distance box culvert passing under the railway station is divided into a jacking section, a cast-in-place section, and a jacking section. A temporary beam structure is used to jack the railway line. The precast box culvert is jacked in from both sides and then connected by cast-in-place, so as to achieve construction without interrupting railway operation.

Benefits of technology

This method enables urban roads to smoothly cross railway stations under shallow soil cover conditions, providing a construction method that does not interrupt railway operations. It solves the problem of integrating urban roads with railway stations and has high practicality and promotion value.

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Abstract

The invention relates to a construction method of a long-distance box culvert for shallow covering soil to penetrate through a railway yard, which comprises the following steps: respectively constructing two working pits on two sides of an existing railway line, and respectively prefabricating a box culvert section in the two working pits; auxiliary beam structures are constructed at the corresponding positions of the existing railway line where the two box culvert sections are about to pass through, the auxiliary beam supporting structures carry out temporary overhead supporting on the existing railway line, and each box culvert section is correspondingly provided with the corresponding construction auxiliary beam structure; the two box culvert sections are jacked, so that the two box culvert sections are in place; and a cast-in-place foundation pit is excavated at the butt joint position between the two box culvert sections, the two jacked box culvert sections serve as access channels, and cast-in-place sequential connection of the two box culvert sections is completed in the cast-in-place foundation pit. The method has the advantages that under the condition that the railway operation is not interrupted, the shallow covering soil passes through the railway station yard, the problems that the number of station tracks is large, the distance is long, the risk is large, and the precision is high are solved, and a new thought and method are provided for urban roads to pass through the operating railway station.
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