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Grouting structure of prestressed concrete stiffening beam long duct and construction method thereof

A technology of prestressed and stiffened beams, applied in the field of engineering, can solve problems such as inability to obtain effective guarantees, and achieve the effects of convenient construction organization, good effect and remarkable benefits

Pending Publication Date: 2021-01-15
CCCC FOURTH HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the grouting of prestressed corrugated pipes within 50m can achieve the purpose of grouting through the large-cycle grouting process, but how to ensure the compactness of grouting for ultra-long corrugated pipes is still not effectively guaranteed

Method used

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  • Grouting structure of prestressed concrete stiffening beam long duct and construction method thereof
  • Grouting structure of prestressed concrete stiffening beam long duct and construction method thereof

Examples

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Effect test

Embodiment 1

[0033] Such as Figure 1-Figure 2 As shown, a grouting structure for long channels of prestressed concrete stiffened beams, including a grout filling pipe 1, a grout discharge pipe 2, a grout stop valve 3, a transparent steel wire hose 4, a four-way connector 5, a grouting device, a pumping Vacuum machine 9, super long prestressed tunnel 11 and concrete stiffened beam 12;

[0034] The concrete stiffening beam 12 is provided with a super-long prestressed channel 11, and both ends of the super-long prestressed channel 11 are provided with grouting holes 10, and the upper ends of the grout filling pipe 1 and the grout discharge pipe 2 are both communicate with the outside world, the lower ends of the grout filling pipe 1 and the grout discharge pipe 2 pass through the concrete stiffening beam 12 and communicate with the super-long prestressed tunnel 11, and the grout filling pipe 1 is provided with a stop Slurry valve 3;

[0035] There are multiple grout filling pipes 1, two gr...

Embodiment 2

[0047] A construction method for a grouting structure of a prestressed concrete stiffened beam long channel, comprising the following steps:

[0048] Step 1: Before vacuuming, close all the slurry stop valves 3, and when vacuuming, open the four stop valves 3 on the four-way connector 5, and then close the slurry stop valves connected to the external interface 3, and open described vacuum pumping machine 9 to carry out vacuuming;

[0049] Step 2: when the vacuum pressure reaches the control value, simultaneously open the two grouting machines 8 and open the grouting stop valve 3 on the grouting connecting pipe 6 to grout;

[0050] Step 3: During the grouting process, sequentially open the grout stop valve 3 on the grout filling pipe 1 from both ends of the concrete stiffening beam 12 toward the mid-span direction, and check the grouting situation, and wait for the grout to flow from the mid-span When the grout filling pipe 1 flows out to a certain transparent steel wire hose 4,...

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Abstract

The invention provides a grouting structure of a prestressed concrete stiffening beam long duct and a construction method thereof. The grouting structure comprises a grout supplementing pipe, grout discharging pipes, grout stopping valves, transparent steel wire hoses, a four-way connector, grouting devices, a vacuumizer, an ultra-long prestressed duct and a concrete stiffening beam, wherein the ultra-long prestressed duct is arranged in the concrete stiffening beam, grouting holes are formed in the two ends of the ultra-long prestressed duct, a grout stop valve is arranged on the grout supplementing pipe, two connectors of the four-way connector communicate with the two grout discharging pipes through the two transparent steel wire hoses respectively, in the other two connectors of the four-way connector, one connector communicates with the vacuumizer through the transparent steel wire hose, the other connector communicates with the outside through the transparent steel wire hose, four connectors of the four-way connector are provided with a grout stop valve respectively, and the two grouting devices communicate with the two ends of the ultra-long prestress duct respectively. Thegrouting structure can ensure the compactness of grouting.

Description

technical field [0001] The invention relates to the technical field of engineering, in particular to a grouting structure for a long channel of a prestressed concrete stiffened beam and a construction method thereof. Background technique [0002] As one of the most important links in post-tensioned prestressed concrete components, channel grouting directly affects the safety and durability of bridges and components during use. Since the prestressed channel is not in a horizontal state in many cases, if the grouting of the channel is not dense or there are defects, the prestressed steel beam may break away from the package of the grouting material, which will cause the corrosion of the prestressed tendon, which greatly determines the quality of the bridge. load capacity and service life. [0003] At present, the grouting of prestressed corrugated pipes within 50m can achieve the purpose of grouting through the large cycle grouting process, but how to ensure the compactness o...

Claims

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Application Information

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IPC IPC(8): E04G21/04E04C3/26
CPCE04G21/0418E04C3/26
Inventor 马利刚弥毅刚张克胜刘宇峰王海涛陈志强王继平高硕良高威威胡庆康
Owner CCCC FOURTH HIGHWAY ENG
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