Rectangular staggered joint shield based capping segment and post segment assembling structure and method

Abstract

The invention discloses a rectangular staggered joint shield based capping segment and post segment assembling structure and method. The method comprises steps as follows: lower T-shaped segments at the bottom of assembling space as well as left waist segments and right waist segments located on two sides of each lower T-shaped segment respectively are assembled; a first assembling zone is reserved at the top of the assembling space; a second assembling zone is reserved on the left side or the right side of the top of the assembling space; upper T-shaped segments are assembled in the first assembling zone; capping segments are assembled in the second assembling zone; post segments are assembled between the upper T-shaped segments and the lower T-shaped segments. The upper T-shaped segments, the capping segments and the post segments are sequentially mounted, and the capping segments and the abutted waist segments are not staggered, the ring height difference between adjacent rings and an assembling gap between the adjacent segments are effectively controlled, the problem that the capping segments cannot be inserted into the gaps is solved, a gap between the upper and lower T-shaped segments is easier to control, and the longitudinal insertion stability of the middle post segments is high.

Description

technical field [0001] The invention relates to an assembly of shield segments, in particular to an assembly structure and method of capping segments and column segments of a rectangular shield with staggered seams. Background technique [0002] Segment assembly is an important sub-item in shield tunneling construction. It occupies a very special position in the shield tunneling construction process and plays a vital role in the entire project. The quality of segment assembly directly affects the stress condition of the shield tunnel and affects the quality of the entire project. Improper segment assembly is prone to misalignment, opening angle, and uneven ring surface, resulting in local stress concentration, which may lead to segment fragmentation, leakage, and even failure to assemble the lower ring segments. [0003] In the construction of rectangular shield method tunnels, staggered joints are used to assemble rectangular tunnel segments (columns set up in the middle)....

AI Technical Summary

Problems solved by technology

[0006] 2) It is difficult to control the ring height difference

[0007] Rectangular segment rings are connected by oblique bolts, and the adjustable gap between rings is small. Once the ring height difference is too large, the oblique bolts cannot be inserted smoothly, so it is difficult to control the ring height difference during assembly. bigger

[0008] 3) It is difficult to control the opening angle of ring and longitudinal seam

[0009] Segment rings are connected by oblique bolts. Segment blocks and blocks are connected by pre-embedded bolt-type joint steel boxes combined with short bolts. The adjustable gaps are small. If it is too large, it will easily cause fragmentation and leakage of the segment, and it may also cause difficulty in inserting the top block and the middle column, which will seriously affect the quality of the formed segment

[0010] 4) It is difficult to insert the middle column

[0011] The gap between the upper and lower blocks of the rectangular segment and the corresponding position are difficult to control. When the middle column is inserted longitudinally, it is prone to misalignment and deflection, the segment is broken, the ring surface is uneven, and the construction is difficult.

[0012] 5) Poor assembly proficiency and slow assembly speed

At the same time, the positioning requirements of the bottom block, capping block, block and middle column of the rectangular segment are particularly high, and it takes a long time to assemble a ring segment

[0014] 6) Stable control is difficult during assembly

[0019] However, the structural form of the double-circular shield segment is quite different from that of the rectangular shield segment, and the assembly method of the double-circular shield segment structure cannot be adapted to the rectangular shield; the existing rectangular shield assembly method is limited to Seamed rectangular segment structure, its assembly method is not suitable for staggered seamed rectangular segment structure

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