Method for carrying out tower site foundation pit construction on karst landform foundation in rainy season

A technology for karst and foundation pits, applied in infrastructure engineering, excavation, construction, etc., can solve problems that are rarely reported and introduced, and achieve the effects of avoiding falling and collapse, improving efficiency, and improving safety
CN104775438AActive Publication Date: 2015-07-15STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2015-07-15
Patent Text Reader

Abstract

The invention relates to a method for carrying out tower site foundation pit construction on a karst landform foundation in a rainy season. The method is characterized by comprising the steps of excavating a foundation pit by adopting water mill drilling or ladder-shaped alternative type blasting, pre-embedding a PVC (Poly Vinyl Chloride) water guiding pipe during foundation pit protective wall construction, and coating a pipe opening by adopting dry rice straws and a fine sand net; dividing a water ponding situation into three grades of a serious water ponding grade, a medium water ponding grade and a common water ponding grade, and excavating a karst landform foundation pit which is in the serious water ponding grade by adopting an Shallow sump drainage method; for a karst landform foundation pit which is in the mediumwater ponding grade, carrying out concrete pouring by adopting a funnel lifting and underwater concrete pouring method; for a karst landform foundation pit which is in the common water ponding grade, carrying out the concrete pouring by adopting a crane ladle water pumping concrete pouring method. According to the method disclosed by the invention, the efficiency of the tower site foundation pit construction can be effectively increased, the construction safety is increased, and the falling and the collapsing during a foundation pit construction process can be avoided.
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Description

technical field

[0001] The invention relates to a method for constructing a tower foundation pit in a rainy season of a karst landform foundation. Background technique

[0002] The Guangdong ยฑ800kV direct current transmission line project of Nuozhadu Power Station 14 bids starts from Luqi Village (D193), Matou Town, Wuming County, and ends at Mo Village (J401), Donglong Town, Qintang District, Guigang. The length of the line is 95.8km, and 187 new iron towers are built, including 34 strain towers and 153 straight towers. The route passes through Matou Town, Wuming County, Xiangxian Town, Shanglin County, Xinxu Town, Zouxu Town, Yangqiao Town, Heji Town, Binyang County, Zhangmu Township, Menggong Township, Shanbei Township, Qintang District, Guigang City Township, Donglong Town. The tower foundation adopts slab type straight column foundation (31 foundations), excavated foundation (146 foundations), and rock embedded foundation (10 foundations). According to the summary st...

Claims

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