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Soft rock tunnel TBM supporting system and supporting method

A tunnel and soft rock technology, applied in the field of soft rock tunnel TBM support system, to control the deformation of surrounding rock, ensure high stress compensation, good impact resistance and energy absorption performance

Active Publication Date: 2021-06-18
BEIJING ZHONGKUANG INNOVATION ALLIANCE ENERGY & ENVIRONMENTAL SCI RES INST
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  • Description
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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of, to solve or alleviate the problem of soft rock tunnel TBM support system in the prior art

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  • Soft rock tunnel TBM supporting system and supporting method
  • Soft rock tunnel TBM supporting system and supporting method
  • Soft rock tunnel TBM supporting system and supporting method

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Embodiment Construction

[0040] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0041] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, so they cannot be understood as Limitations on the Invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, for example, it can be fixe...

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Abstract

The invention belongs to the technical field of lined tunnels, and particularly relates to a soft rock tunnel TBM supporting system and supporting method. Through holes are formed in the middles of pipe pieces; NPR anchoring parts are arranged in the through holes; surrounding rocks are anchored and restrained through the NPR anchoring parts; and a temporary supporting system with the combination of the powerful NPR anchoring parts and the pipe pieces as the core is formed. The supporting method comprises the steps that when a tunnel face is driven, a certain deformation space needs to be reserved for releasing deformation energy of surrounding rocks; and after excavation of the tunnel face is completed, the NPR anchoring parts need to carry out high-pretightening-force supporting on the surrounding rocks in time, and high-stress compensation is performed on the surrounding rocks, so that the surrounding rocks are promoted to recover the original stress state again, and the purpose of controlling the stability of the surrounding rocks is achieved. The construction process comprises the following steps of 1, laying a reinforcing mesh on a tunnel wall surface after the tunnel face is driven; 2, splicing the pipe pieces into an annular pipeline on the reinforcing mesh; 3, installing the NPR anchoring parts in the through holes of the pipe pieces; and 4, after the surrounding rocks are stabilized, dismantling the pipe pieces, and performing secondary lining construction.

Description

technical field [0001] The invention belongs to the technical field of lining tunnels, and in particular relates to a soft rock tunnel TBM support system and a soft rock tunnel TBM support method. Background technique [0002] During the construction of TBM (Tunnel Boring Machine) in soft rock tunnels, the surrounding rock is faced with the danger of large deformation or even collapse, so the closed TBM construction scheme is generally adopted, that is, after the tunnel face is pushed forward, the support structure is constructed in time at the rear, so that Ensure the safety of construction personnel and equipment to the greatest extent. [0003] Due to factors such as geological conditions and the difficulty in controlling the deformation of the surrounding rock in the primary support technology, TBMs often experience jamming and other phenomena, which makes the TBM construction technology of soft rock tunnels face great difficulties and becomes a technical bottleneck in T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/15E21D11/18E21D21/00
CPCE21D11/006E21D11/152E21D11/18E21D21/0026
Inventor 何满潮郭志飚
Owner BEIJING ZHONGKUANG INNOVATION ALLIANCE ENERGY & ENVIRONMENTAL SCI RES INST
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