Unlock instant, AI-driven research and patent intelligence for your innovation.

Subway station concrete crack control method

A technology for subway stations and concrete, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve the problems of not ideal crack control effect in subway stations, complicated layout of cooling water pipes, etc., so as to solve a large number of cracks and reduce temperature. effect of stress

Active Publication Date: 2019-03-29
CCCC THIRD HARBOR ENG +2
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the concrete in the subway station is relatively thin, the concrete used is not large-volume concrete, and a large number of cracks will be generated near the construction joints due to temperature stress. Therefore, this conventional cooling water pipe arrangement is not particularly ideal for the crack control effect of the subway station. , and the layout of the cooling water pipe is cumbersome

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
  • Subway station concrete crack control method
  • Subway station concrete crack control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The crack control method of the present invention is carried out after the binding of structural steel bars is completed and includes the following steps:

[0029] Step 1: Arrange a water pipe symmetrically at a distance of 125mm above and below the lower construction joint 10 generated from the bottom plate 100 and the side wall 200 to form the first group of water pipes 1a at the bottom; One water pipe is symmetrically arranged at 125mm to form the first group of water pipes 1b at the top; one water pipe is symmetrically arranged at a distance of 250mm from the first group of water pipes 1a at the bottom to form the second group of water pipes 2a at the bottom; A water pipe is symmetrically arranged at 250mm above and below 1b, which is the second group of water pipes 2b at the top;

[0030] Step 2: Starting from the downpipe of the second group of water pipes 2a at the bottom, a number of water pipes are gradually increased to 550mm at intervals of 450mm and filled i...

Embodiment 2

[0043] The concrete crack control method of a subway station of the present invention relates to a subway station with a frame structure composed of a bottom plate 100, two side walls 200 and a top plate 300, and a column 400 is arranged between the bottom plate 100 and the middle of the top plate 300. The crack control method of the present invention is carried out after the binding of structural steel bars is completed and includes the following steps:

[0044] Step 1: Arrange a water pipe symmetrically at a distance of 150 mm above and below the lower construction joint 10 generated from the bottom plate 100 and the side wall 200 to form the first group of water pipes 1a at the bottom; One water pipe is symmetrically arranged at a distance of 150mm to form the first group of water pipes 1b at the top; one water pipe is symmetrically arranged at a distance of 300mm above and below the first group of water pipes 1a at the bottom to form the second group of water pipes 2a at th...

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 discloses a subway station concrete crack control method. Water pipes are distributed near construction joints, on side walls and at chamfered positions. The water pipes are distributedunevenly and are densely distributed near all the construction joints. Water starts to be introduced after concrete completely covers the water pipes. The water flow of the water pipes is controlled to be in the range of 4-6 m<3> / h until the internal temperature in the concrete reaches the maximum value; the water flow of the water pipes is reduced to the range of 2-4 m<3> / h, and water is continuously introduced for 12-24 hours; after construction, cement paste or mortar with the strength not lower than that of the concrete is used for carrying out grouting on the cooling water pipes. According to the method, hydration heat generated by the newly poured concrete at the upper part can be well utilized to heat the concrete poured at the lower part, the temperature difference stress between the upper concrete and the lower concrete of the construction joints is greatly reduced, and the historical problem that a large quantity of cracks are generated near the construction joints due to theconcrete temperature stress is effectively solved.

Description

technical field [0001] The invention relates to a crack control method for subway station concrete. Background technique [0002] With the further development of my country's economy and the further increase of national wealth, the phenomenon of urban agglomeration is becoming more and more obvious, and the phenomenon of urban congestion is also becoming more and more serious. At the same time, the development of domestic urbanization has further accelerated, and domestic metropolises have begun to develop towards metropolitan areas. These have greatly promoted the prosperity of rail transit such as subways and intercity railways, especially subway projects. Since my country built the first subway line in Beijing in 1965, subways have blossomed all over the country, such as Beijing, Shanghai, Shenzhen, Guangdong, Hubei, Hunan, Jiangsu, Zhejiang, Heilongjiang, Jilin, Liaoning, Henan, Sichuan, Shaanxi China, Anhui, Guangxi, Guizhou and other provinces and cities have successi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045
CPCE02D29/04
Inventor 李维洲刘刚谷坤鹏胡楠陈克伟温发培张洪良张晓乐王玉亮赵善鹏
Owner CCCC THIRD HARBOR ENG