Prestressed steel fiber concrete shield tunnel structure and construction method thereof
A fiber reinforced concrete and shield tunnel technology, which is used in tunnels, earth-moving drilling, tunnel lining and other directions to achieve the effect of improving overall stiffness, reasonable stress and convenient construction.
Pending Publication Date: 2022-05-13
贾永刚
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Problems solved by technology
[0004] For this reason, the present invention provides a prestressed steel fiber concrete shield tunnel structure and its construction method to solve the above-mentioned technical problems of the existing prestressed shield tunnel structure with low rigidity and low reinforcement
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[0025] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall also be regarded as the implementable scope of the present invention without substantive change of the technical content.
[0027] A ...
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The invention discloses a prestressed steel fiber concrete shield tunnel structure and a construction method thereof.The shield tunnel structure comprises shield pipe rings and annular prestressed structures, each shield pipe ring comprises a plurality of shield pipe pieces, and the shield pipe pieces are connected into an annular whole through the annular prestressed structures; annular prestress is applied to each shield segment through the annular prestress structure, the annular prestress structure comprises an annular corrugated pipe which is annularly pre-embedded in a shield pipe ring, the shield segments are formed by pouring steel fiber reinforced concrete, and the steel fiber reinforced concrete is concrete doped with short steel fibers which are distributed disorderly; the method comprises the steps of prefabricating the shield segments, assembling the shield pipe rings and forming the shield tunnel structure. The prestressed steel fiber concrete shield tunnel structure and the construction method thereof have the advantages that the use amount of steel bars is small, rigidity is large, deformation resistance is high, cracking resistance is high, the service life of a tunnel can be prolonged by replacing prestressed tendons, structural safety can be guaranteed, and construction is convenient.
Description
technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a prestressed steel fiber concrete shield tunnel structure and a construction method thereof. Background technique [0002] Shield tunneling is widely used in urban rail transit and municipal underground projects because of its advantages such as high degree of mechanization, fast operation speed, less on-site wet work, and labor cost savings. With the increase of running time, in the common shield tunnel structure engineering, there are many diseases such as shield tunnel structure leakage, uneven settlement, clearance convergence does not meet the requirements; especially the tunnel in the muddy soft soil layer, It has unfavorable conditions such as large void ratio, high water content, high compressibility, high sensitivity, low shear strength, small permeability coefficient, long time for consolidation and sub-consolidation settlement deformation, and flow deformat...
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IPC IPC(8): E21D11/08
CPCE21D11/08
Inventor 贾永刚程雯
Owner 贾永刚