Construction method for pouring tunnel second lining self-compacting concrete

A self-compacting concrete and construction method technology, applied in tunnel lining, tunnel, earthwork drilling and mining, etc., can solve the problems of uncompacted concrete filling, large concrete drop, concrete segregation, etc., to ensure the quality of the solid structure, high fluidity, Avoid the effect of exposed tendons and retention

Inactive Publication Date: 2016-09-07
北京住总集团有限责任公司
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for pouring self-compacting concrete for the second lining of the tunnel. It is necessary to solve the problem that the existing concrete storage method requires a large pump pressure for bottom extrusion pouring, which is prone to "suffocatio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Construction method for pouring tunnel second lining self-compacting concrete
  • Construction method for pouring tunnel second lining self-compacting concrete
  • Construction method for pouring tunnel second lining self-compacting concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] Examples see Figure 1-9 As shown, a construction method of pouring self-compacting concrete for the second lining of the tunnel is provided by taking the construction of self-compacting concrete for the second lining of the tunnel in the full-circle needle beam formwork trolley as an example. The second lining of the tunnel is a reinforced concrete lining structure with a certain thickness constructed on the base surface of the first lining of the tunnel after the construction of the first lining of the tunnel is completed. During the construction of the second lining of the tunnel, the formwork needs to be set up on the basis of the first lining of the tunnel. The use of full-circle needle beam formwork trolley formwork is currently the commonly used formwork method for circular tunnels. At the same time, it is difficult to vibrate the concrete in the circular formwork space. , using vibration-free self-compacting concrete for pouring.

[0050] The specific construct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a construction method for pouring tunnel second lining self-compacting concrete. Firstly, pouring is conducted from a waist window on the single side for storage, and then a top pouring mode is switched. The construction method comprises the steps that a ground pump pipe is arranged for storage, specifically, after formwork erection of a trolley is finished, the pump pipe is connected into the trolley, and the pump pipe is guided to an observation window on one side through a hose for storage; concrete at the bottom of formworks is poured, specifically, the concrete poured from the single side for storage flows from one side to the other side till the lower observation window is closed; and pipe switching is conducted, specifically, the hose is moved out from the side pouring window and connected with a corresponding top pouring hole till pouring is finished. By the adoption of the construction method, on one hand, applicability selection of the ground pump power in the pouring process of an all-round-formwork trolley of the self-compacting concrete is achieved; and on the other hand, reinforcing bar reveal and retention of the bottom concrete are effectively avoided, finally the construction quality of concrete structure formation is improved, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to underground engineering, in particular to a construction method of self-compacting concrete with two linings cast in place for tunnels. Background technique [0002] With the continuous development of underground engineering in my country, self-compacting concrete has been widely used in tunnel (hole) lining structures due to its good fluidity, stability, segregation resistance and uniformity, especially in water conveyance tunnels. The tunnel structure is supported by built-in formwork, and the self-compacting concrete is poured in one time to reduce the horizontal joints of the structure. The self-compacting concrete is transported from the ground to the ground first, then transported from the ground to the pouring work surface, and then pumped to the pouring port by the ground pump for warehousing. The choice of different siloing methods has a certain influence on the concrete pouring process and the effect of structural mold...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/102E21D11/105
Inventor 施笋杨富强王坡张颍辉孟晓龙樊继丰商伟阳刘俊王振东张文旭张楠李征庄晶晶王辉
Owner 北京住总集团有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap