Connecting method of circumferential steel arch frame sealing units for supporting TBM construction tunnel
A connection method and technology of closed cells, which are applied in tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve problems such as poor operability, inconsistency between the outer boundary of the arch frame and the excavation outline, and time-consuming and labor-intensive problems.
Inactive Publication Date: 2020-09-15
CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES
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Problems solved by technology
Due to the constant diameter of TBM excavation, and the inconsistency of the surrounding rock, especially in the unfavorable geological tunnel section, when the steel arches are processed and connected in batches according to the design curvature, the outer boundary of the arches is often inconsistent with the excavation contour. As a result, it is difficult for the primary support arch to cling to the rock wall and play a timely role in supporting the surrounding rock.
Before the circular arch is closed into a ring in the TBM construction of a circular tunnel, under the c
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[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments, based on The embodiments of the present invention and all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0014] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc. indicate the orientation or positional relationship based on the orientation shown in the drawings. Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must h...
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The invention discloses a connecting method of circumferential steel arch frame sealing units for supporting a TBM construction tunnel. The steel arch frame units in a circumferential steel arch framesealing position are provided with waist-shaped bolt holes in web plates at the ends of one sides respectively, and two side connecting channel steels with the same curvature as the steel arch frameunits are provided with the same waist-shaped bolt holes at the two ends of web plates; the two channel steels are arranged at the connection position of the two steel arch frame units in the circumferential steel arch frame sealing position and fixed through the waist-shaped bolt holes, two connecting steel plates are arranged on the surfaces of upper wing plates and the lower wing plates of theconnecting channel steels, gaps between wing edges of the steel arch frame units at the two sides are closed, and the rigidity of the closed position is enhanced by welding along the contact seams between the channel steels and the arch frame units, between the connecting steel plates and the arch frame wing edges, and between the connecting steel plates and the periphery of the channel steels. Therefore, the circumferential r steel arch frame units for supporting the TBM construction tunnel are fast and firmly sealed and connected. The connecting method of the circumferential steel arch framesealing units for supporting the TBM construction tunnel adapts to deformation of different surrounding rocks, rapidly seals the circumferential steel arch frame, and timely and reliably plays a supporting role of the steel arch frame.
Description
Technical field [0001] The technology of the present invention relates to a connection method of a circular steel arch frame closed unit for tunnel support, in particular to a connection method of a circular steel arch frame closed unit for TBM construction tunnel support. Background technique [0002] In tunnel design, especially for tunnel sections with poor geological conditions, primary support plays an important role in limiting the deformation of surrounding rock, ensuring the stability of surrounding rock and the safety of the tunnel structure. In engineering, steel grating or steel arch frame shotcrete is generally used as the primary support method. Circular tunnels are widely used in tunnels excavated by roadheaders and tunnels with poor geological conditions due to their better water flow and stress conditions. [0003] In the excavation and support of the circular TBM construction tunnel, in order to facilitate installation, the steel arch frame is processed into sever...
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CPCE21D11/18
Inventor 池建军张海涛杨凡李宁博刘进马骋孙健文雯赵茜瑶蔡伊琼
Owner CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES