CN-117189165-B - Shield tunnel lining circular ring and assembling method thereof

CN117189165BCN 117189165 BCN117189165 BCN 117189165BCN-117189165-B

Abstract

The invention discloses a shield tunnel lining circular ring and an assembling method, wherein the shield tunnel lining circular ring comprises a plurality of wedge blocks, one or more of the plurality of wedge blocks are positioned on an upper semi-ring of the shield tunnel lining circular ring, each wedge block is provided with two longitudinal wedge faces, a plurality of adjacent blocks are respectively provided with one longitudinal wedge face and one non-longitudinal wedge face, the longitudinal wedge faces of the adjacent blocks are matched with the longitudinal wedge faces of the wedge blocks, and a plurality of standard blocks are positioned between the non-longitudinal wedge faces of the adjacent blocks so as to form the shield tunnel lining circular ring together with the plurality of wedge blocks and the adjacent blocks. The invention can solve the technical problems that when the top sealing block in the lining circular ring of the shield tunnel is positioned on the lower half section of the lining circular ring, the inserting difficulty of the top sealing block is greatly increased and the local damage of the lining circular ring is easily caused.

Inventors

CHEN RENDONG
LIANG ZHICHAO
GUO SONG
ZHANG HUIRUI
CHEN MINGKUI
LI JIANLIN
LI JING
WANG YANRAN
LIU MINGGAO
PANG KANG
TANG HONG
WU JINGANG
LIU XIANGYU
ZHOU CHANGLIN
SUN YE
WANG XIA

Assignees

北京市市政工程设计研究总院有限公司

Dates

Publication Date: 20260508
Application Date: 20230915

Claims (10)

1.A shield tunnel lining ring comprising: One or more wedge blocks are positioned on the upper semi-ring of the shield tunnel lining circular ring, and each wedge block is provided with two longitudinal wedge faces; a plurality of adjacent blocks, wherein each adjacent block is provided with a longitudinal wedge surface and a non-longitudinal wedge surface, and the longitudinal wedge surfaces of the adjacent blocks are matched with the longitudinal wedge surfaces of the wedge blocks; A plurality of standard blocks, wherein each standard block is positioned between non-longitudinal wedge faces of the adjacent blocks to form a shield tunnel lining circular ring together with the wedge blocks and the adjacent blocks; A plurality of wedge blocks are arranged on the lining circular ring at intervals, so that no matter how the lining circular ring rotates, at least one wedge block is distributed on the upper semi-ring and can be used as a sealing block.
2. The shield tunnel lining ring of claim 1, wherein, The plurality of wedge blocks comprise a first wedge block (F1), a second wedge block (F2) and a third wedge block (F3); The plurality of abutment blocks comprises a first pair of abutment blocks (L1A, L B), a second pair of abutment blocks (L2A, L B) and a third pair of abutment blocks (L3A, L B), wherein the longitudinal wedge faces of the first pair of abutment blocks (L1A, L1B) are in engagement with the longitudinal wedge faces of the first wedge block (F1), the longitudinal wedge faces of the second pair of abutment blocks (L2A, L B) are in engagement with the longitudinal wedge faces of the second wedge block (F2), and the longitudinal wedge faces of the third pair of abutment blocks (L3A, L3B) are in engagement with the longitudinal wedge faces of the third wedge block (F3); The plurality of standard blocks comprise a first standard block (B1) and a second standard block (B2) so as to form the shield tunnel lining circular ring together with the first wedge block (F1), the second wedge block (F2), the third wedge block (F3), the first pair of adjacent blocks (L1A, L B), the second pair of adjacent blocks (L2A, L B) and the third pair of adjacent blocks (L3A, L B); the first wedge block (F1) is located at the upper half ring of the shield tunnel lining ring and serves as a capping block for the shield tunnel lining ring.
3. The shield tunnel lining ring of claim 1, wherein, The plurality of wedge blocks comprise a first wedge block (F1), a second wedge block (F2) and a third wedge block (F3); The plurality of abutment blocks comprises a first pair of abutment blocks (L1A, L B), a second pair of abutment blocks (L2A, L B) and a third pair of abutment blocks (L3A, L B), wherein the longitudinal wedge faces of the first pair of abutment blocks (L1A, L1B) are in engagement with the longitudinal wedge faces of the first wedge block (F1), the longitudinal wedge faces of the second pair of abutment blocks (L2A, L B) are in engagement with the longitudinal wedge faces of the second wedge block (F2), and the longitudinal wedge faces of the third pair of abutment blocks (L3A, L3B) are in engagement with the longitudinal wedge faces of the third wedge block (F3); The plurality of standard blocks comprise a first standard block (B1) and a second standard block (B2) so as to form the shield tunnel lining circular ring together with the first wedge block (F1), the second wedge block (F2), the third wedge block (F3), the first pair of adjacent blocks (L1A, L B), the second pair of adjacent blocks (L2A, L B) and the third pair of adjacent blocks (L3A, L B); the second wedge (F2) and/or the third wedge (F3) are located at the upper half-ring of the shield tunnel lining ring and act as a capping block for the shield tunnel lining ring.
4. A shield tunnel lining ring according to claim 2 or 3, characterized in that a second abutment block (L2B) of the second pair of abutment blocks (L2A, L B) is engaged with a first abutment block (L3A) of the third pair of abutment blocks (L3A, L B).
5. A shield tunnel lining ring according to claim 2 or 3, further comprising a third standard block (B3), the third standard block (B3) being located between a second abutment block (L2B) of the second pair of abutment blocks (L2A, L B) and a first abutment block (L3A) of the third pair of abutment blocks (L3A, L B).
6. A method for assembling a lining ring of a shield tunnel according to any one of claims 1 to 5, comprising: Assembling a plurality of wedge-shaped blocks and a plurality of adjacent blocks, wherein each wedge-shaped block is provided with two longitudinal wedge-shaped faces, each adjacent block is provided with a longitudinal wedge-shaped face and a non-longitudinal wedge-shaped face, and the longitudinal wedge-shaped faces of the adjacent blocks are matched with the longitudinal wedge-shaped faces of the wedge-shaped blocks; Assembling the plurality of adjacent blocks with a plurality of standard blocks, wherein each standard block is positioned between non-longitudinal wedge-shaped surfaces of the plurality of adjacent blocks; one or more of the plurality of wedge blocks are spliced to an upper half ring of a shield tunnel lining ring and serve as a capping block for the shield tunnel lining ring.
7. The method of claim 6, wherein the step of providing the first layer comprises, Assembling a first wedge block (F1) with a first pair of adjacent blocks (L1A, L B), assembling a second wedge block (F2) with a second pair of adjacent blocks (L2A, L B), and assembling a third wedge block (F3) with a third pair of adjacent blocks (L3A, L B); Assembling the assembled first pair of adjacent blocks (L1A, L B), the assembled second pair of adjacent blocks (L2A, L B) and the assembled third pair of adjacent blocks (L3A, L B) with a first standard block (B1) and a second standard block (B2) to jointly form the shield tunnel lining circular ring; Wherein the first wedge block (F1) is located at an upper half ring of the shield tunnel lining ring and serves as a capping block for the shield tunnel lining ring.
8. The method of claim 6, wherein the step of providing the first layer comprises, Assembling a first wedge block (F1) with a first pair of adjacent blocks (L1A, L B), assembling a second wedge block (F2) with a second pair of adjacent blocks (L2A, L B), and assembling a third wedge block (F3) with a third pair of adjacent blocks (L3A, L B); Assembling the assembled first pair of adjacent blocks (L1A, L B), the assembled second pair of adjacent blocks (L2A, L B) and the assembled third pair of adjacent blocks (L3A, L B) with a first standard block (B1) and a second standard block (B2) to jointly form the shield tunnel lining circular ring; Wherein the second wedge (F2) and/or the third wedge (F3) are located at the upper half-ring of the shield tunnel lining ring and act as a capping block for the shield tunnel lining ring.
9. The method of claim 7 or 8, wherein splicing the first pair of spliced contiguous blocks (L1A, L B), the second pair of spliced contiguous blocks (L2A, L B), and the third pair of spliced contiguous blocks (L3A, L B) with the first standard block (B1) and the second standard block (B2) comprises splicing a second contiguous block (L2B) of the second pair of contiguous blocks (L2A, L B) to a first contiguous block (L3A) of the third pair of contiguous blocks (L3A, L3B).
10. The method of claim 7 or 8, wherein assembling the first pair of assembled adjacent blocks (L1A, L B), the second pair of assembled adjacent blocks (L2A, L B), and the third pair of assembled adjacent blocks (L3A, L B) with the first standard block (B1) and the second standard block (B2) comprises assembling a third standard block (B3) between a second adjacent block (L2B) of the second pair of adjacent blocks (L2A, L B) and a first adjacent block (L3A) of the third pair of adjacent blocks (L3A, L B).

Description

Shield tunnel lining circular ring and assembling method thereof Technical Field The invention relates to the technical field of tunnel engineering constructed by a shield method, in particular to a shield tunnel lining circular ring and an assembling method thereof. Background In the prior art, a tunnel structure constructed by a shield method is generally formed by assembling a plurality of prefabricated reinforced concrete segments according to a certain sequence. Among the plurality of segments that make up the annular structure, the last segment that is assembled is commonly referred to as a capping block, the segment that is adjacent to the capping block is referred to as an abutment block, and the remaining segments are referred to as standard blocks. Namely, the shield tunnel lining circular ring is generally composed of a plurality of standard blocks, 2 adjacent blocks and 1 capping block. Taking a general wedge-shaped ring with a full ring divided into 10 blocks as an example, the assembly sequence is illustrated as follows, firstly, assembling a standard block B4, continuously and symmetrically assembling standard blocks B5, B3, B6, B2, B7 and B1 block by block, then assembling adjacent blocks L2, L1, finally assembling a sealing top block F, and sealing the ring. The assembling sequence of the segments can be adjusted according to the actual condition, the equipment condition or the operation habit of the site, but the sequence of assembling the standard blocks and the adjacent blocks is fixed at first and then assembling the top sealing blocks is fixed at last under the state that other segments are all in place. Fig. 1 is a schematic view of a shield tunnel lining ring adopted in the prior art, wherein R is the radius of an intrados of a segment lining ring, R is the radius of an extrados of a segment lining ring, B is the standard ring width of the segment lining ring, bmin is the minimum ring width, bmax is the maximum ring width, the wedge amount delta=bmax-Bmin, B1-B7 are standard blocks, L1 and L2 are adjacent blocks, and F is a capping block. In the prior art, the capping blocks are assembled in a manner of being inserted longitudinally. The longitudinal direction refers to the axial center direction of the tunnel lining circular ring, namely the tunneling direction of the shield machine, and the longitudinal inserting direction of the capping block is opposite to the advancing direction of the shield machine. For this purpose, the capping block is an insert block with a longitudinal wedge shape. The position of the top sealing block on the cross section of the lining circular ring can be positioned at any feasible assembling position along with the dynamic selection of the optimal scheme of the assembling point. Because the capping block is a longitudinal insertion block assembled at the end of the full ring, whether the capping block is successfully positioned is seriously influenced by the assembly precision of other segments positioned before the capping block. The longitudinal insertion resistance of the sealing block is from the two aspects of the space of the circular ring notch left after other pipe pieces are assembled in place and the compression force of the water stop strip between the pipe piece joints. In the related art, when the capping block is positioned on the upper semi-ring of the lining circular ring, the capping block is beneficial to guaranteeing the assembly quality, guaranteeing the waterproof quality and guaranteeing the stress uniformity of the lining circular ring, and is convenient for construction. When the capping block is positioned on the lower half section of the lining circular ring, namely, before the capping block is longitudinally inserted, a circular ring notch left after other segments are assembled in place is positioned on the lower half section, and is influenced by factors such as gravity action, the annular compression of a water stop bar is not in place, construction errors and the like, all segments assembled in advance have a tendency to slide in the notch direction of the lower half section, and along with the accumulation of positioning errors, the space size of the notch is easy to be smaller than a theoretical value. This will greatly increase the difficulty of inserting the block at the lower half section, and when forced insertion with a larger jack reaction force will cause the segment to be partially broken or the water stop strip to be "rubbed" up longitudinally to be displaced or even damaged. Therefore, in order to avoid the possible problem that occurs when the top sealing block is located on the lower half section, the prior art may generally discard the optimal assembly point, and select the assembly point of the top sealing block located on the upper half ring for a second time, so as to reduce the construction difficulty. Disclosure of Invention The invention aims to provide a shield tunnel lining circular ring and an assem