TBM online multi-mode supporting system and construction method

Abstract

The invention discloses a TBM online multi-mode supporting system and a construction method. The supporting system comprises a cutterhead, a shield body, a main drive, a main propelling system, a main beam, a supporting shoe and an auxiliary propelling system. The multifunctional splicing system comprises a steel pipe piece splicing functional assembly, a steel arch splicing functional assembly, a rotating functional assembly used for driving the steel pipe piece splicing functional assembly and the steel arch splicing functional assembly to rotate, and a translation functional assembly used for driving the rotating functional assembly to translate along the main beam; the steel pipe piece splicing function assembly and the steel arch splicing function assembly are arranged in a staggered mode in the extending direction of the main beam, and one of the steel pipe piece splicing function assembly and the steel arch splicing function assembly can extend out of the rotating function assembly. According to the TBM online multi-mode supporting system, under the complex geological conditions, the multifunctional assembling system can assemble the steel pipe pieces and the steel arches online, the supporting capacity of the TBM for coping with the complex geological conditions is improved, and the switching time of multiple supporting modes is shortened.

Description

technical field [0001] The invention relates to the field of support systems, in particular to a TBM online multi-mode support system and a construction method. Background technique [0002] The support methods of TBM are related to the geological conditions of the tunnel, mainly including: segments, steel arches, steel tiles, etc. In order to ensure construction safety and improve the ability of TBM to cope with complex geological conditions, a combination of multiple support methods is required. [0003] The conventional TBM support method is simple. During the construction process, only one of the segments, steel arches, and steel tiles can be assembled, and the ability to deal with complex geology is obviously insufficient. In recent years, the TBM multi-mode support system has been studied. The existing TBM multi-mode support system is offline, and only one of the steel pipe piece assembly function and the steel arch assembly function can be used. If you want to use the...

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Problems solved by technology

[0003] Conventional TBM has a single support method. During the construction process, only segments, steel arches, and steel tiles can be assembled, and the ability to deal with complex geology is obviously insufficient.

In recent years, TBM multi-mode support system has been studied. The existing TBM multi-mode support system is offline. Only one of the functions of steel pipe sheet assembly and steel arch assembly can be used. If you want to use the other function, you must It is necessary to replace the original functional components with the latter functional components. The whole process is time-consuming and laborious, which affects the construction efficiency. At the same time, the ability to quickly switch the support mode is weak in the case of geological mutations, and cannot provide support for the tunnel in time.

[0004] Moreover, in the switching process of the TBM multi-support mode, the switching process from the steel pipe sheet to the steel arch frame is relatively easy, but the switching process from the steel arch frame to the steel pipe sheet is difficult. Since the auxiliary propulsion system acts on the steel pipe sheet, the initial section The steel pipe sheet needs sufficient support and reaction force. In the prior art, reaction force support devices or tension rings are often pre-installed. This method has a long switching cycle, which is not conducive to TBM's rapid response to adverse geological conditions.

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