Method for preventing and controlling cast-in-place concrete lining structure cracks

A control method and concrete technology, which can be applied in shaft lining, earthwork drilling, tunnel lining, etc., can solve problems affecting the durability of tunnels and underground engineering, reducing engineering safety, and increasing the permeability of lining structures, etc.

Active Publication Date: 2019-03-29
CHANGAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The appearance of cracks not only affects the durability of tunnels and underground projects, but also for tunnels and underground projects that are erosive to su

Method used

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  • Method for preventing and controlling cast-in-place concrete lining structure cracks
  • Method for preventing and controlling cast-in-place concrete lining structure cracks
  • Method for preventing and controlling cast-in-place concrete lining structure cracks

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Embodiment Construction

[0030] Attached below Figure 1-5 , a specific embodiment of the present invention will be described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0031] Such as figure 1 As shown, a method for preventing and controlling cracks in a cast-in-place concrete lining structure provided by the embodiment of the present invention is a dynamic design and construction concept of tunnel and underground engineering based on the engineering behavior of the lining structure applied to the formation and growth of the strength of the cast-in-place concrete lining The dynamic process of stage crack prevention and control; based on the structural properties and constraints of the cast-in-place concrete lining and the crack control objectives of the lining concrete, the principle of setting a flexible layer on the outside of the cast-in-place lining is determined. Include the following steps.

[0032] 1. ...

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Abstract

The invention relates to the technical field of composite type lining tunnel and underground engineering, and discloses a method for preventing and controlling cast-in-place concrete lining structurecracks. The method includes the following steps of determining engineering characteristic indexes A of a tunnel and underground engineering lining structure, determining crack control indexes E, determining constraint condition indexes B beneficial for preventing and controlling the lining concrete cracks, monitoring the lining concrete construction environment and variation rule thereof on site,determining construction environment characteristic indexes C, determining healthcare condition indexes D beneficial for preventing and controlling the cracks after lining concrete demolding, and judging whether the indexes A, B, C and D related to the crack preventing and control method need to be modified or not. According to the method for preventing and controlling the cast-in-place concrete lining structure cracks, the aim of controlling the contraction quality of a cast-in-place concrete lining is realized, and the expected aim of structure safety and durability design is realized.

Description

technical field [0001] The invention relates to the technical field of composite lining tunnels and underground engineering, in particular to a method for preventing and controlling cracks in cast-in-situ concrete lining structures. Background technique [0002] For tunnels and underground projects using composite lining, shrinkage cracks and differential deformation cracks between concrete with different pouring times often appear during the strength formation period of the secondary lining or the third lining concrete and a short period of time after construction. The appearance of cracks not only affects the durability of tunnels and underground projects, but also for tunnels and underground projects with erosive groundwater in surrounding rocks, the existence of cracks will increase the permeability of the lining structure, thereby reducing the safety of the project. For tunnels and underground projects that use composite linings, the prevention and control of shrinkage ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21F17/18
CPCE21D11/10E21F17/18
Inventor 马建秦陈万春任柯刘杰邹存俊薛琛穆伟强韩彦瑞孙小斌方攀
Owner CHANGAN UNIV
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