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Shield tunnel portal strengthening structure

A technology for reinforcing structures and shield tunnels, applied in tunnels, tunnel linings, shaft linings, etc., can solve the problems of reducing the reinforcement efficiency of tunnel openings, delaying the construction period of tunnels, and poor stability of reinforced structures, so as to increase convenience and shorten construction The effect of increasing the construction period and increasing the practicality

Pending Publication Date: 2020-09-11
GUANGXI UNIV +1
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Problems solved by technology

However, due to complex underground conditions, changes in groundwater levels and other changes are likely to affect the external load of the shield structure, resulting in deformation of the shield tunnel structure. Considering the aging of materials and structures, the entrance of the shield tunnel often needs to be reinforced. To ensure the normal construction of the tunnel, but the stability of the existing reinforcement structure is poor, and at the same time, the reinforcement work requires a lot of manpower and material resources, which reduces the reinforcement efficiency of the tunnel opening, delays the tunnel construction period, and increases the engineering cost of the tunnel

Method used

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Embodiment Construction

[0029] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] Such as Figure 1-6 As shown, a shield tunnel entrance reinforcement structure includes a reinforcement structure body 1. It should be noted that the reinforcement structure body 1 includes a mortar layer 11, a hollow layer 12, a steel plate layer 13 and a fiber layer 14, which are compounded by pouring epoxy resin Forming can improve the ultimate bearing capacity and rigidity of the shield tunnel opening, so that the staff can realize rapid reinforcement of the tunnel under harsh conditions such as narrow space and short reinforcement time, and improve the reinforcement efficiency of the tunnel opening.

[0031] The inner side of the reinforcement structure body 1 is provided with multiple sets of reinforcement plates 2. It should be noted that the reinforcement plates 2 adopt an arc-shaped structure, and the reinforcement plates 2 are evenly arr...

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Abstract

The invention belongs to the technical field of tunnel strengthening and particularly relates to a shield tunnel portal strengthening structure. The shield tunnel portal strengthening structure comprises a strengthening structure body. Multiple sets of strengthening plates are arranged on the inner side of the strengthening structure body. Connecting pillars are arranged on the outer side of the strengthening structure body. The strengthening plates are matched with the connecting pillars. The strengthening structure body is provided with a base, and the base is fixedly connected with a hydraulic cylinder. The hydraulic cylinder communicates with a supporting seat. One end of the supporting seat is fixedly connected with the base, and multiple sets of telescopic rods are detachably connected to the other end of the supporting seat. By means of the shield tunnel portal strengthening structure, the limit bearing capability and rigidity of a shield tunnel portal are effectively improved,workers can achieve fast strengthening of a tunnel under rigorous conditions such as narrow space and short allowed strengthening time, the strengthening efficiency of the tunnel portal is improved, the construction period of tunnel portal strengthening work is shortened, the project cost of tunnel strengthening is reduced, and the shield tunnel portal strengthening structure is popularized in a proper range.

Description

technical field [0001] The invention belongs to the technical field of tunnel reinforcement, and in particular relates to a shield tunnel entrance reinforcement structure. Background technique [0002] The shield method is a fully mechanized construction method in the underground excavation method. It is to push the shield machine in the ground, and support the surrounding rock through the shield casing and segments to prevent collapse into the tunnel. A mechanized construction method in which the soil is excavated with a cutting device in front of the excavation face, transported out of the hole by an excavation machine, pushed in by a jack at the rear, and assembled with prefabricated concrete segments to form a tunnel structure. With the continuous popularization of shield tunnels, the construction requirements of shield tunnels are constantly increasing. At the same time, the deficiencies in the actual construction of shield tunnels also need to be improved and resolved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D15/44E21D11/10
CPCE21D9/14E21D15/44E21D11/10
Inventor 吴波黄惟张子仪李志刚赵涵滢罗建波李静智学民蒙国往邓政许杰
Owner GUANGXI UNIV
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