Laminated prefabricated double-layer duct piece structure
A segment and double-layer technology is applied in the field of superimposed prefabricated double-layer segment structures, which can solve the problems of high cost and less application, and achieve the effects of convenient construction, good economic effect and enhanced reliability.
Pending Publication Date: 2021-11-02
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology
At present, domestic research and application are concentrated in the field of bridges. For example, the steel-UHPC bridge structure has been well developed in recent years, but there are few applications in other fields. One important reason is that its cost is too high
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[0032] Example: such as Figure 1-13 Shown: the present invention includes three standard blocks 1, connecting block A2, connecting block B3, and wedge-shaped top block 4 connected to each other; the segment lining blocks are all composed of an outer UHPC protective layer 5 and an inner common concrete layer 6 structure; the UHPC protective layer 5 is close to the ordinary concrete layer 6; the ordinary concrete layer 6 is uniformly distributed with screw holes 7 adjacent to the standard block 1, the connecting block A2, the connecting block B3, and the wedge-shaped top block 4. The connecting bolts pass through the screw holes 7 to fasten the connection; the UHPC protection layer 5 includes the stressed steel bars a8 and part of the truss bars 10, and the ordinary concrete layer includes the stressed bars b9 and part of the truss bars 10; the UHPC protection layer Layer 5 and ordinary concrete layer 6 are closely connected together through the truss-stressed steel grid formed...
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The invention belongs to the field of underground engineering, and particularly relates to a laminated prefabricated double-layer duct piece structure. The laminated prefabricated double-layer duct piece structure comprises three standard blocks, a connecting block A, a connecting block B and a wedge-shaped top block which are connected with one another, wherein each duct piece comprises a UHPC protection layer and a common concrete layer, the duct pieces are connected through longitudinally-reserved screw holes and mounting holes reserved in the duct pieces, the UHPC protection layers and the common concrete layers are prefabricated in a laminated mode, in the prefabrication process, the UHPC protection layers serve as laminated plates and are laminated with the common concrete layers poured on the laminated plates to form the double-layer duct pieces, load-bearing steel bars and truss steel bar net racks are arranged in the UHPC protection layers to ensure the stress performance of the arc-shaped pipe pieces and the reliability of interlayer connection, and the outer sides of the UHPC protection layers do not need to be waterproof. The laminated prefabricated double-layer duct piece structure has the advantages that the laminated prefabricated double-layer duct piece is adopted, the bonding reliability of the UHPC layers and the concrete layers is enhanced, interlayer stress concentration caused by initial self-constriction of UHPC materials is avoided, materials are saved, the economic effect is good, the dead weight of the duct pieces is reduced, transportation is convenient, and the anti-permeability and corrosion resistance of the duct piece structure are enhanced.
Description
technical field [0001] The invention belongs to the field of underground engineering, in particular to a superimposed prefabricated double-layer segment structure. Background technique [0002] Segment lining structure is often used in underground space engineering, especially when shield tunneling method is used for construction, segment lining is often used. Nowadays, with the rapid development of cities, the utilization rate of above-ground space is getting lower and lower, and the development of underground space has become a new trend of urban construction. In recent years, major cities in China have built subways and comprehensive pipe corridors, and tunnels are often excavated in traffic to ensure the normal operation of the city and traffic. The use of shield machines is also increasing, and the utilization rate of segment linings increases accordingly. . Ordinary concrete segments have high requirements on anti-seepage, especially in special areas such as groundwa...
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IPC IPC(8): E21D11/08
CPCE21D11/08E21D11/083E21D11/086
Inventor 杨博涵张延年回志峰韩东
Owner SHENYANG JIANZHU UNIVERSITY