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Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet

A technology of functionally graded materials and shield tunneling, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effect of high overall stability

Inactive Publication Date: 2007-01-03
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] The introduction of functionally graded materials into the design of concrete segments of underground tunnels has not been reported in China at present, and there are considerable gaps in the technology and patents of the strengthening of the interface transition zone of functional materials and construction techniques. Therefore, through systematic research, the establishment of The design theory of functionally graded tunnel segment materials with independent intellectual property rights in my country and the related interface strengthening technology are crucial and imperative

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  • Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet
  • Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet
  • Functional gradient material interface enhancing technology for shield driven tunnel concrete pipe sheet

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with example and accompanying drawing.

[0028] Such as figure 1 , figure 2 , image 3 , Figure 5 As shown, the functionally graded material interface strengthening process of the shield tunnel concrete segment, the interface between the reinforced concrete structure layer 1 and the high impermeability protection layer 2 of the shield tunnel concrete segment is a functionally graded material interface, which includes the following steps:

[0029] 1) Pour high-performance concrete with a strength grade greater than C50 in the reinforced concrete segment steel mold to a distance of 15 to 80 mm from the surface of the steel mold, and then insert and tamp to form a reinforced concrete structural layer 1 with a thickness of 420.0 to 485.0 mm;

[0030] 2) Perform functionally graded material interface strengthening treatment: Emboss an embedded broken-line interface 3 on the upper surface of the reinfor...

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Abstract

The present invention relates to a functional gradient material interface reinforcing process for shield tunnel concrete segment. The contact face of the reinforced concrete structure layer and high-impervious protecting layer of shield tunnel concrete segment is the functional gradient material interface, and is characterized by that said interface reinforcing process includes the following several steps: 1), in reinforced concrete segment steel mould pouring high-performance concrete whose strength grade is greater than C50 so as to form reinforced concrete structure layer; 2), making functional gradient material interface reinforcing treatment: on the upper surface of the reinforced concrete structure layer stamping embedded polygonal interface, the included angle of polygonal line of embedded polygonal interface and horizontal plane is 15-65deg; 3), on the embedded polygonal interface adopting pumping process to pour high-performance fine aggregate concrete to upper surface of reinforced concrete segment steel mould so as to form high-impervious protecting layer.

Description

technical field [0001] The invention relates to a process for strengthening the interface of a shield tunnel concrete segment with a functional gradient material. Background technique [0002] Since the 1960s, the shield tunnel lining structure has gradually popularized and applied assembled reinforced concrete segments. Reinforced concrete segments have a certain strength and are relatively easy to process and manufacture. When steel molds are used (single block production), the accuracy of the segment can be guaranteed (at home and abroad, it can reach ±0.5mm), corrosion resistance, and low cost. At present, it is the most commonly used in China. . However, there are also many shortcomings in engineering applications, such as: large shrinkage deformation, easy to crack, poor waterproof and durability, and fire resistance performance is not considered. Therefore, it is particularly important to optimize the design of concrete segment materials and improve their engineerin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/04B28B1/00
Inventor 马保国高英力王信刚王凯金宇罗忠涛
Owner WUHAN UNIV OF TECH
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