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Subway station structural crack repairing and reinforcing method and reinforcing part

A subway station and structural technology, applied in the repair of basic structures, underwater structures, basic structure engineering, etc., can solve problems such as cracking at cracks, poor durability of reinforcement and repair, and improve waterproofness and tensile strength Intensity, increasing overall effect

Pending Publication Date: 2022-07-08
CHINA RAILWAY DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At the same time, the present invention also provides a structural crack repair reinforcement for subway stations, which can solve the problem in the prior art that the concrete side walls of subway station structures are under the action of external water and soil pressure, and the tensile stress inside the side walls exceeds the tensile strength of the concrete structure. , under the action of continuous load, the crack position cracks again and the durability of the reinforcement repair is poor and other technical problems

Method used

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  • Subway station structural crack repairing and reinforcing method and reinforcing part
  • Subway station structural crack repairing and reinforcing method and reinforcing part
  • Subway station structural crack repairing and reinforcing method and reinforcing part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 , figure 2 , image 3 , Figure 4 As shown, a method for repairing and strengthening structural cracks in a subway station includes the following steps:

[0044] S1: Remove the degraded concrete on the surface of the structural crack to expose the surface of the concrete member, excavate the concrete on both sides of the surface of the structural crack to 30mm below the initial concrete member, form a groove, and repair and smooth the surface of the concrete member;

[0045] S2: A row of bolt holes is opened on the surface of the structural crack, and the concrete members are vertically driven through the bolt holes, and the spacing between the adjacent bolt holes in each row of bolt holes is 150-220mm;

[0046] S3: injecting the grouting slurry into the structural crack;

[0047] S4: inject adhesive into the bolt holes, and insert shear bolts into the bolt holes;

[0048] S5: after the adhesive is solidified in step S4, welding steel bars at the pos...

Embodiment 2

[0064] A structural crack repair reinforcement for a subway station, comprising a concrete member 8, a bolt hole 2, and a shear bolt 3, the concrete member 8 is located at a structural crack, and the structural crack divides the concrete member 1 into two parts, Two sides of the structural crack are provided with grooves, and the grooves are filled with a cement mortar layer;

[0065] Both sides of the structural crack are provided with bolt holes 2, a plurality of bolt holes 2 are distributed in a row, the bolt holes 2 are filled with adhesive, and the bolt holes 2 are inserted with shear bolts. 3. The shear bolts 3 on both sides of the structural crack are fixed by steel bars 4 .

[0066] The grooves are formed by excavating the concrete on both sides of the structural crack to 30 mm below the surface of the initial concrete member 5 , and the concrete member 6 is excavated after the concrete member is excavated.

[0067] The spacing between adjacent bolt holes 2 on the sam...

Embodiment 3

[0072] In this embodiment, on the basis of Embodiment 1, the extensive reinforcement of the surface of the concrete member 8 is further increased to increase the integrity of the concrete member 8 on both sides of the structural crack 1 . A carbon fiber cloth 7 is laid on the surface of the concrete member 1 , and the carbon fiber cloth 7 includes a transverse carbon fiber cloth and a longitudinal carbon fiber cloth, and the carbon fiber cloth 7 is vertically interlaced with the longitudinal carbon fiber cloth. The laying method of the carbon fiber cloth is as follows: in the direction of the vertical crack, laying 2500mm on both sides of the edge of the structural crack; in the direction parallel to the crack, laying 500mm beyond the end of the structural crack, in the direction of the vertical structural crack and Double-layer carbon fiber cloth is used for each direction parallel to the structural cracks.

[0073] The installation of carbon fiber cloth enhances the integrit...

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Abstract

The subway station structural crack repairing and reinforcing method comprises the steps that S1, degraded concrete on the surface of a structural crack is removed, concrete on the two sides of the surface of the structural crack is excavated to the position 30 mm below an initial concrete member, and a groove is formed; s2, a row of bolt holes are formed in the surface of each structural crack, and the concrete members are vertically driven into the structural cracks through the bolt holes; s3, pouring slurry is injected into the structural crack; s4, an adhesive is injected into the bolt holes, and shear bolts are inserted into the bolt holes; s5, after the adhesive in the step S4 is solidified, steel bars are welded to the bolt head positions on the two sides of the structural crack; s6, performing protection treatment; and S7, the grooves dug in the step S1 are filled with cement mortar. The technical scheme is mainly applied to a single crack with the width exceeding 0.1 mm caused by the load in a cast-in-place concrete member of a subway station, and the crack can be repaired and reinforced through the method no matter how the crack form and the plane trend are.

Description

technical field [0001] The invention relates to the technical field of underground structure engineering, in particular to a method for repairing and reinforcing structural cracks in a subway station and a reinforcing member. Background technique [0002] Cracks in concrete structures are a common technical problem, and are the main direct reason for the reduction of bearing capacity, durability and waterproofness of structures. Therefore, it is necessary to take effective repair and reinforcement measures. [0003] Analysis of cracking causes and identification of crack properties are very important for repairing and strengthening cracks. Repair is based on a comprehensive analysis of the causes of defects, and the ways and methods to eliminate these causes should also be considered, so that the correct choice of repair materials and techniques can be made. [0004] The occurrence of concrete cracks is due to the fact that the internal stress of the concrete structure is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D37/00E02D29/045
CPCE02D37/00E02D29/04Y02E10/20
Inventor 张鹏康镜蒙蛟吴浩冀维都王林辉姜伟丹杨富翔张继清张春雷杨贵生马振海杨峥王众李光京王达麟吴薪柳
Owner CHINA RAILWAY DESIGN GRP CO LTD
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