Method for controlling quality of tunnel pipe sheet built by using shield method and pipe sheet structure

Abstract

The invention provides a method for controlling the quality of a tunnel pipe sheet built by using a shield method, which comprises the steps of pipe sheet structure design, pipe sheet construction detection, pipe sheet assembling quality requirement and tunnel stability control, wherein in the pipe sheet structure design, the water prevention and the bonding strength are improved by the structural design of a connecting way, strength, water prevention, and the like of pipe sheets; in the pipe sheet construction detection, the eight-point measurement is carried out on the pipe sheets in the process of construction, the concentricity relation between the previous ring of pipe sheets and a shield shell is calculated, and the position of the next ring of pipe sheets is selected; in the pipe sheet assembling quality requirement, an assembled ring height difference and a longitudinal joint flare angle are controlled to confirm the assembling quality; and in the tunnel stability control, the floating of the pipe sheets is effectively prevented in a frame weight and synchronous slurry injection matching construction way after assembly. Accordingly, the quality of the pipe sheets is controlled in the whole course from structural design to construction, thereby ensuring the tunnel construction quality.

Description

technical field [0001] The invention mainly relates to a method for controlling the quality of tunnel lining in shield tunnel construction, especially a method for improving the quality of tunnel lining by means of waterproof design, strength design, and pressure after collage of segments. Background technique [0002] The segments are assembled into a ring in the shield tail as the shield machine advances, which is the main structure of the tunnel. Each ring segment consists of several standard blocks, 2 adjacent blocks, and 1 capping block. [0003] At present, according to the construction of different shield machines, there are two mainstream assembling forms of segments, one is that the capping block is assembled at the top, and the other is that the capping block can be assembled at any position. [0004] Segment type: [0005] (1) Taking the capping block assembled at the top as an example, the segments generally consist of left-curved rings, straight-line rings and...

AI Technical Summary

Problems solved by technology

Especially under the premise that the joints are required for segment assembly, it is very difficult to correct the axis deviation in construction. When necessary, the segments must be fitted with the design axis by pasting cork strips, which brings great inconvenience to the construction, and Construction quality is difficult to guarantee

[0013] In terms of tunnel quality control, the control of some quality indicators such as the super-large diameter tunnel ellipticity, the tunnel axis, and the buoyancy of the tunnel in China is not completely satisfactory, especially the control of the tunnel buoyancy.

[0014] Furthermore, each segment is connected to its front, rear, left, and right adjacent segments by bolts. The current connection structure is that each segment is provided with several grooves recessed by the inner arc surface. , the grooves of two adjacent segments are communicated with through holes, so that the bolt penetrates the through hole from the groove of one segment, and then penetrates into the groove of the other segment, and connects with a bolt located in the groove. The nut is screwed, the operator clamps the bolt head with a wrench, and then tightens the nut with another wrench. In this way, the operation

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