Method for reinforcing base with bored pile in the underground structure of high groundwater level

A technology of underground structure and construction method, which is applied in the direction of foundation structure engineering, sheet pile wall, building, etc., can solve the problem that the groundwater cannot be constructed, and achieve the effect of low cost and simple operation.

Active Publication Date: 2009-10-07
CHINA CIVIL ENG CONSTR CORP
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Problems solved by technology

[0003] The invention provides a construction method of using bored piles to reinforce the foundation in the existing underground structure with high groundwater level, to solve the problem that groundwater gushes out and cannot be constructed when the bored piles are used to penetrate the bottom plate of the underground structure to reinforce the foundation in high groundwater level areas question

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  • Method for reinforcing base with bored pile in the underground structure of high groundwater level
  • Method for reinforcing base with bored pile in the underground structure of high groundwater level
  • Method for reinforcing base with bored pile in the underground structure of high groundwater level

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Embodiment Construction

[0029] Examples see Figure 1-Figure 6 Shown, construction method of the present invention can have following steps:

[0030] see figure 1 As shown, in step 1, the surface layer concrete within the diameter of 1200mm at the pile site is chiseled away from the structural bottom plate 1, the thickness of the chiseled concrete 3 can be 200mm, and the upper layer of the bottom plate is exposed, and the circumference diameter of the chiseled concrete 3 is larger than the diameter of the pile to be penetrated. The diameter of the water-stop steel sleeve 8, and the upper steel bar 4 of the structural bottom plate is cut off to form a working platform.

[0031] see figure 2 As shown, step 2, install the grouting pipe, drill 3 grouting holes 5 distributed at 120° along the outer periphery of the above-mentioned chiseled concrete 3, penetrate the grouting pipe, and the depth of the pipe is in the stratum 2 about 1m below the structural floor; The outer peripheral diameter of the con...

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Abstract

A method for reinforcing base with bored pile in the underground structure of high groundwater level, the steps of which is as following: 1) removing the concrete on the surface of pile at the structural flask board, 2) drilling grouting borehole along the external circumstance of the aforementioned concrete and inserting the grout pipe into to the strata under the structural flask board, 3) water-stop grouting the strata under the structural flask board to the place of structural flask board, 4) drilling holes, 5) removing the concrete blocks at the hole site, 6) installing water-stop steel sleeve barrel, 7) installing permanent steel casing, and carrying out pile construction. This construction method efficaciously prevents the ground water flowing when the drilling pile passing the underground structural flask board, and accounts for the technical problem that the construction can not be carried out with emission of the ground water flood when the drilling pile penetrating through the underground structure flask board reinforcement base at the high groundwater level place.

Description

technical field [0001] The invention relates to a reinforcement construction method for building foundations, in particular to a construction method for reinforcement foundations in areas with high groundwater levels. Background technique [0002] When the groundwater level is higher than the floor of the existing underground structure, and it is necessary to drill bored piles through the floor of the underground structure to reinforce the foundation, the usual construction method of drilling a permanent steel casing first and then drilling is no longer applicable, because As long as the bottom plate of the underground structure is damaged, groundwater will flow into the underground structure along the gap between the permanent steel casing and the bottom plate, which will not only affect the normal use of the structure during construction, but also cause difficulties in construction. Contents of the invention [0003] The invention provides a construction method of using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46
Inventor 冯旭郭志强
Owner CHINA CIVIL ENG CONSTR CORP
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