Liquid division slip casting reinforcing method for subsurface structure construction joints

A technology for underground structures and construction methods, applied in underwater structures, infrastructure engineering, artificial islands, etc., can solve the problems affecting the normal use of underground structures and related facilities, the rigidity of retaining walls, and the poor integrity, etc. Slurry effect, increase strength, effect of short gel time

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A technology for underground structures and construction methods, applied in underwater structures, infrastructure engineering, artificial islands, etc., can solve the problems affecting the normal use of underground structures and related facilities, the rigidity of retaining walls, and the poor integrity, etc. Slurry effect, increase strength, effect of short gel time

CN102002950BInactive Publication Date: 2012-04-04SOUTHEAST UNIV +1

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[0018] The post-grouting reinforcement construction technique method of underground structure construction joint of the present invention mainly comprises the following steps:

[0019] (1) During the construction of the underground structure, a special grouting pipe 2 is installed at the construction joint 9 at the end of the adjacent structural section: the special grouting pipe 2 is fixed at the end of the reinforcement cage 12 and lowered together with the reinforcement cage 12 .

[0020] (2) The special grouting pipe 2 includes a feed inlet 6 and a closed end 5. A plurality of grouting holes 3 are arranged on the outer wall of the special grouting pipe 2, and the special grouting pipe 2 is locked up with a rubber film;

[0021] (3) Separation grouting;

[0022] When the concrete poured in the underground structure reaches more than 70% of the design strength, use a high-pressure pump to pass through the special grouting pipe 2, and first inject high pressure into the oute...

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Abstract

The invention discloses a liquid division slip casting reinforcing method for subsurface structure construction joints, mainly aiming at the problems that as the subsurface structure construction is severely influenced by ground water, the peripheral structure leaks water, the material strength is reduced, the structure integrity is poor and the like. A purpose-made grouting pipe is arranged at the construction joint of a structure connector with weak stress in the process of subsurface structure peripheral construction, and the liquid division slip casting reinforcing operation is performed based on a designated method, thus making up for the defects of poor rigidity and poor waterproof effect at the construction joint of the subsurface structure preferably. The method in the invention has good grouting effect and high grouting success rate, can effectively improve the strength and the integrality of the subsurface structure, and reduce the leakage of the construction joint of the subsurface structure.

Description

technical field [0001] The invention belongs to the grouting reinforcement technology for construction joints of underground structures. It is suitable for the peripheral construction of large-scale underground structure projects in soft soil areas with shallow buried water table and deep underground structures, especially in silty silt soil geological conditions. Background technique [0002] The peripheral construction joints of the underground structure are the joints that longitudinally connect two adjacent sections of the enclosure structure. Due to the division of structure and construction, they are often the parts with relatively weak force. However, the function of use should meet the requirements of force and anti-seepage (to ensure the impermeability and integrity of the wall), and strive to be simple in construction, so as not to cause difficulties in the construction of other peripheral structures. There are many ways to connect construction joints in the perip...

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Application Information

Patent Timeline

04 Apr 2012

Publication

CN102002950B

IPC: E02D15/02; E02D29/16

Inventors: 刘松玉; 侯新宇