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Construction method for basement floor seepage under Karst landform conditions

A technology of basement floor and construction method, which is applied in basic structure engineering, on-site foundation soil survey, protection devices, etc., can solve problems such as frequent water seepage, troublesome construction, and ineffective drainage effect, etc., and achieve good control effect, The construction cost is small and the effect is obvious

Active Publication Date: 2019-04-05
CHINA CONSTR 4TH ENG BUREAU 6TH
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Problems solved by technology

The traditional construction methods of plugging, grouting and hydrophobic layer are not only troublesome in construction, but also prone to repeated water seepage, and the drainage effect is not obvious

Method used

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  • Construction method for basement floor seepage under Karst landform conditions
  • Construction method for basement floor seepage under Karst landform conditions
  • Construction method for basement floor seepage under Karst landform conditions

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiments of the present invention: a construction method for seepage of basement floor under karst landform conditions, first calculate the maximum water inflow of basement floor seepage according to the following formula:

[0031]

[0032] In the formula:

[0033] Q—water gushing volume

[0034] R—radius of influence, determined by observation hole data

[0035] r—pile hole radius

[0036] h 0 — Effective length of inlet section

[0037] S—water level drawdown in the pile hole

[0038] K—permeability coefficient

[0039] l gR and l gr According to the second volume of "Water Supply Hydrogeology Handbook"

[0040] When the water inflow Q3 / d. When the water head pressure is less than 0.1Mpa, the drill-bolt compaction and comp...

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Abstract

The invention discloses a construction method for basement floor seepage under Karst landform conditions. The construction method is implemented by a prefabricated steel pipe. An annular plate is welded in the middle of the prefabricated steel pipe, through holes are uniformly formed in the annular plate, expansion bolts are arranged in the through holes, water seepage holes are uniformly formed in the pipe wall of the lower portion of the prefabricated steel pipe, a filter screen sleeve sleeves the lower portion of the prefabricated steel pipe, and a backwash device is inserted in the prefabricated steel pipe. Severe seepage regions can be perforated by the aid of the construction method according to structure floor water seepage distribution conditions, underground water pressure reliefand drainage can be carried out by rear pressure relief and drainage pipes, backwash and cleaning can be periodically carried out, the smoothness of drainage pipes can be guaranteed, a floor can keepdry, and accordingly the construction method has the advantages of simple structure, low manufacturing cost, obvious drainage effects and the like. Besides, the construction method can be widely applied to engineering for floor cracking seepage due to confined water and is extensive in popularization.

Description

technical field [0001] The invention relates to a construction method for water seepage of a basement floor under karst landform conditions, and belongs to the technical field of waterproof engineering in building construction. Background technique [0002] Karst landforms are widely distributed in the Yunnan-Guizhou Plateau region of my country. Due to the characteristics of soluble rocks, the rocks have large cracks and strong water permeability, and it is easy to form local high pressure water points. During the construction process, this phenomenon leads to more leakage of the floor. The foundation floor of the building is prone to cracking and water seepage due to the influence of water pressure in the area of ​​high confined water. Therefore, it is necessary to timely drain the confined water of the floor. The traditional construction methods of plugging, grouting and hydrophobic layer are not only troublesome in construction, but also prone to repeated water seepage, a...

Claims

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Application Information

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IPC IPC(8): E02D31/02E02D31/04E02D31/12E02D1/08
CPCE02D1/08E02D31/02E02D31/04E02D31/12E02D2300/0021E02D2300/0029
Inventor 董浩周靖康
Owner CHINA CONSTR 4TH ENG BUREAU 6TH
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