Plain pile reinforcement system used for reserving conditions for long-term lines passing existing lines and construction method of system

A technology with existing lines and conditions, applied in the field of plain pile reinforcement system and its construction, it can solve problems such as the inability to fully guarantee the operation safety of existing lines, avoid formation loss and settlement deformation, high economic and social benefits, and easy to process and manufacture. Effect

Inactive Publication Date: 2017-06-09
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Problems solved by technology

[0003] When the long-term line crosses the existing line, it is necessary to find a way to overcome the formation loss and settlement deformation generated during the tunnel construction, but the conventional ground pre-reinforcement

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  • Plain pile reinforcement system used for reserving conditions for long-term lines passing existing lines and construction method of system
  • Plain pile reinforcement system used for reserving conditions for long-term lines passing existing lines and construction method of system
  • Plain pile reinforcement system used for reserving conditions for long-term lines passing existing lines and construction method of system

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Embodiment Construction

[0031] The present invention will be described in detail below in combination with specific embodiments.

[0032] It is still quite difficult to theoretically find out the ground pre-reinforcement treatment method for the long-term line to safely pass through the existing line under conventional conditions. At the same time, the safe operation of existing lines involves public safety, so it must be foolproof. The selection of ground reinforcement methods must be based on the safe operation of existing lines, the surrounding environment and the safety of the tunnel's own structure. purpose of stability. Especially when close to existing subway stations and tunnels, underground commercial complexes, large-scale municipal projects, hospitals, schools and laboratories and other key protection objects, crossing existing line projects at close range, the current project involves reserving long-term lines to cross existing lines The basic principle of adapting measures to local cond...

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Abstract

The invention relates to a plain pile reinforcement system used for reserving conditions for long-term lines passing existing lines and a construction method of the system. Under the influence of built metro lines and surroundings, later metro line building conditions are relatively strict, and in a project of passing the existing lines, conventional stratum pre-reinforcement treatment measures cannot meet the safe operation requirements of the existing lines. The system comprises existing tunnels and long-term tunnels above or below the existing tunnels, overlapping regions of planar projections of the existing tunnels and the long-term tunnels are interchanging point ranges, and plain concrete piles are arranged at the interchanging point ranges. Sleeve valve pipe grouting reinforcement areas are arranged between the existing tunnels and the long-term tunnels. By means of the system, physical and mechanical parameter indexes of interlayered soil bodies between the existing lines and the long-term lines can be effectively improved, and the safe operation of the existing lines is ensured. The system has the advantages of being flexible to arrange, adjustable in pile diameter and reliable in stratum treatment effect, and is capable of avoiding the unpredictability of a conventional stratum advance pre-reinforcement effect.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a plain pile reinforcement system and a construction method thereof for the condition that a long-term line crosses an existing line is reserved. Background technique [0002] For the current rail transit projects in major cities in China, with the gradual construction of the planned subway lines and the continuous densification of the long-term network, when the existing subway lines have occupied the main corridors, in the process of long-term line construction, Inevitably, there are many cases of traversing the implemented lines (existing lines). Since the implementation time of the long-term line is relatively late, in many cases, the construction of the implemented line is started when the line is opened for operation, which increases the difficulty and risk of project implementation to a certain extent, and may involve public safety, causing It has attracted ext...

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Application Information

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IPC IPC(8): E02D5/34E02D3/08
CPCE02D3/08E02D5/34
Inventor 戴志仁李润轩王立新王俊马晓波康华王天明李储军曹伟王博翁木生毛念华张海杨沛敏李谈
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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