Blasting construction method of bridge foundation pit under ice layer
A technology for underwater bridges and construction methods, applied in blasting, infrastructure engineering, excavation, etc., can solve the problems of increasing the total construction period, delaying the construction start time, and reducing the economic benefits of the project, so as to increase the operation time, shorten the total construction period, The effect of significant economic and social benefits
Active Publication Date: 2018-09-18
中国建筑土木建设有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a kind of blasting construction method of the bridge foundation pit under the ice layer, solve the problem caused by the construction of the bridge foundation pit in the northern region in the prior art, which needs to be arranged after the ice melts Problems such as delaying the construction start time, increasing the total construction period and reducing the economic benefits of the project
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[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0043] The invention provides a blasting construction method for bridge foundation pits under ice, which is suitable for the construction conditions of bridge foundation pits with water under ice and ice, and the blasting construction method is suitable for blasting thicker ice layers For breaking, the thickness of the ice layer can be more than 2 meters. For the thinner ice layer, the method of manual breaking can be used for chiseling. And when the ice layer is thicker, it will be very laborious to use manual chisel removal, and the external environment is cold in winter, so it is not suitable for long-term outdoor operations. The blasting ice-breaking method adopted in the present invention can quickly remove the ice layer at the position of the bridge foundation pit, thereby providing a working foundation for the construction of the bridge ...
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The invention relates to a blast construction method of an ice layer underwater bridge foundation pit. The blast construction method comprises the following steps that blasting points are arranged at the positions, corresponding to the design position of the bridge foundation pit, on the surface of an ice layer; construction is carried out corresponding to the blast points to form blasting holes located in the ice layer; an explosive structure is inserted into each blast hole; the corresponding ice layer is blasted through the explosive structures, and therefore an icebreaking area corresponding to the design position of the bridge foundation pit is formed in the ice layer; ice blocks in the icebreaking area are cleared away, and a foundation pit supporting structure is inserted along the edge of the design position of the bridge foundation pit; and underground concrete bottom sealing construction is carried out in the supporting structure, and therefore a bottom sealing structural layer is formed, and the bridge foundation pit is defined by the bottom sealing structural layer and the foundation pit supporting structure. Bridge foundation pit construction is carried out before ice melting through a blasting ice removing method, the total construction period is effectively shortened, and remarkable economical and social benefits are achieved.
Description
technical field [0001] The invention relates to the construction field of bridge foundation pits, in particular to a blasting construction method for underwater bridge foundation pits under ice. Background technique [0002] Northeast my country has severe climatic conditions in winter. Due to the extremely low temperature in winter, the water surface and the soil layer are frozen, which makes it impossible for civil engineering to be constructed in winter in Northeast China. General construction projects and bridge projects need to wait It will be implemented after melting ice and soil, which will lead to a short construction period and affect economic development. [0003] For the construction of bridge foundation pits in bridge engineering, the bridge foundation pits are located underwater. Due to the long winter season, deep frozen soil and thick ice layers in northern China, the excavation and construction of bridge foundation pits in northern China requires It is arran...
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IPC IPC(8): F42D1/00F42D3/00E02D17/02
CPCE02D17/02F42D1/00F42D3/00
Inventor 马明磊刘永福王志成王桂玲
Owner 中国建筑土木建设有限公司