A construction method of foundation pit side slope soil nailing precipitation support
A construction method and technology for the edge of the foundation pit, which can be used in basic structure engineering, excavation, construction, etc., can solve the problems of difficult pumping, difficult to form holes, and difficult to form trenches, so as to improve the construction quality, improve the stability and shorten the construction period. Effect
Active Publication Date: 2015-10-14
CHINA CONSTR EIGHT ENG DIV CORP LTD
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Problems solved by technology
However, in soft soil areas, there is a lot of rain, and the mud and water in the foundation trench are mixed, so normal construction cannot be done; soil nailing construction makes it difficult to form holes
Earthwork excavation generally adopts side slope well point dewatering, excavation of foundation trench with open row of water pits, the site is muddy, it is difficult to form ditches, it is difficult to pump water, and silt and sand accumulate; adopt precipitation measures, wait for the rain to stop, and delay earthwork excavation , slope support construction period, construction quality and slope safety are difficult to guarantee
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[0040] like figure 1 Shown, foundation pit side slope soil nailing dewatering support construction method of the present invention, it adopts following steps to be:
[0041] S1, make hollow cannula, combine figure 2 and Figure 2A As shown, the manufactured hollow cannula 100 has an injection hole 110 at the tube head, and side injection holes 120 with valves 130 are distributed on the side wall.
[0042] The hollow cannula can be steel pipe, hard plastic pipe or soft plastic pipe. to combine figure 2 and Figure 2A As shown, the hollow cannula 100 can be a one-piece structure or a split structure. For the one-piece mechanism, the fabrication is relatively simple, only need to flatten the front end of the hollow cannula 100 and leave the injection hole. For the split structure, a tip 101 with an injection hole is connected to the front end of the hollow cannula 100 . The end of the hollow cannula is a single-taper hole structure or a flat-mouth single-hole structure (...
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The invention discloses a foundation pit slope soil-nailing dewatering support construction method. The construction method includes firstly, inserting a hollow insertion pipe into a soil body in a mode that the hollow insertion pipe with the end and the side wall both provided with jet holes is injected with water to jet the soil body, secondly, connecting a water pump with the hollow insertion pipe to pump water in the soil body and a foundation pit, thirdly, injecting cement paste into the hollow insertion pipe to form an anti-pulling anchor pile, and finally, connecting the anti-pulling anchor pile and a steel wire mesh into a whole prior to whitewashing and plastering to form a slope support. The construction method has the advantage of suitability for construction in rainy soft soil areas, and is shorter in construction period, low in energy and consumption, green, environmentally friendly and higher in construction cost as compared with the prior art.
Description
technical field [0001] The invention belongs to the technical field of construction engineering and relates to a construction method for foundation pit dewatering slope support. Background technique [0002] Temporary wells excavated for building foundations are called foundation pits. The foundation pit is a temporary project, and its function is to provide a space so that the basic building construction can be carried out in accordance with the position specified by the design. [0003] In order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, the support, reinforcement and protection measures adopted for the side wall of the foundation pit and the surrounding environment are called foundation pit support. Among them, soil nail wall foundation pit support is the most common and important type of foundation pit support. [0004] The soil nail wall is reinforced by the natural soil through the soil nail w...
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IPC IPC(8): E02D17/04E02D19/10
Inventor焦德贵邓明胜林敏郭辉时康
OwnerCHINA CONSTR EIGHT ENG DIV CORP LTD