Tunnel arch prefabricated segment assembling construction method

A construction method and segment assembling technology, which is applied to tunnels, tunnel linings, shaft equipment, etc., and can solve problems such as insufficient thickness, falling blocks, and non-compactness

Pending Publication Date: 2021-09-10
中铁隧道集团一处有限公司 +2
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AI Technical Summary

Problems solved by technology

The mining method tunnel adopts a series of equipment modification such as controlled under-excavation, window-based mold entry, concentrated vibration, molded grouting and other equipment modification and process and construction method improvement measures. The lining quality has been greatly improved, but the lining strength and thickness of the tunnel arch are insufficient. Quality defects such as lack of compactness and gaps at the back are still very prominent
In recent years, through various inspection methods, it has been found that the railway tunnels that have been laid or opened for

Method used

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  • Tunnel arch prefabricated segment assembling construction method
  • Tunnel arch prefabricated segment assembling construction method
  • Tunnel arch prefabricated segment assembling construction method

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Embodiment Construction

[0034] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0035] to combine figure 1 — Figure 7 As shown, a construction method for assembling prefabricated segments of a tunnel arch comprises the following steps:

[0036] Step A, performing arch prefabricated segment reinforcement cage binding construction in the prefabrication field outside the tunnel hole.

[0037] The prefabricated segment reinforcement cage in the arch is arc-shaped, and the chord length of the segment should at least cover the tunnel driving width. Preferably, the arch prefabricated segment 5 has a chord length of 8.6m and a width of 2m, and is used in a double-track railway tunnel.

[0038] The prefabricated segment reinforcement cage in the arch adopts the structural form of binding inner circumferential ribs, outer circumferential ribs, radial ribs, outer longitudinal ribs, and inner longitudinal ribs. Reinforcing bars 7 are provid...

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Abstract

The invention discloses a tunnel arch prefabricated segment assembling construction method. The method comprises the steps that A, arch prefabricated segment reinforcement cage binding construction is conducted on a prefabrication yard outside a tunnel hole; B, arch prefabricated segments are poured and formed; C, after the arch prefabricated segments are prefabricated, grouped mounting is conducted in the mode that jacking is conducted firstly and then longitudinal sliding is conducted; and D, every 5-6 arch prefabricated segments form a group, after one group is mounted, arch back grouting and arch prefabricated segment and side wall joint grouting are conducted, and all bolts in bolt sinking tables are dismounted after grouting is completed. The tunnel arch prefabricated segment assembling construction method is applied to tunnel assembling type lining construction, the effect that arch prefabricated segment construction is safe and stable is ensured, and accurate lap joint with a cast-in-place side wall can be achieved.

Description

technical field [0001] The invention belongs to the technical field of tunnel concrete lining construction, and in particular relates to a construction method for assembling prefabricated segments in a tunnel arch, which is specially used for an assembled lining structure. Background technique [0002] The traditional construction technology of the second lining of the tunnel adopts full-circle steel bar binding, combined with a fully hydraulic lining trolley, and pours concrete into the vertical pouring holes on the top hole by hole to carry out the concrete pouring of the second lining of the whole ring. The mining method tunnel adopts a series of equipment modification such as controlled under-excavation, window-based mold entry, concentrated vibration, molded grouting and other equipment modification and process and construction method improvement measures. The lining quality has been greatly improved, but the lining strength and thickness of the tunnel arch are insuffici...

Claims

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Application Information

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IPC IPC(8): E21D11/08E21D11/10E21D11/15E21D11/00
CPCE21D11/08E21D11/10E21D11/152E21D11/003
Inventor 王聚山陈海锋宁远思邓敏李成立齐如见刘盛朱光楠陈杭桥邰鹤罗先刚石川牛昭倩
Owner 中铁隧道集团一处有限公司
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