Construction method of stepped miniature pile anchor supporting body
A construction method and micro-pile technology, which is applied in excavation, sheet pile walls, foundation structure engineering, etc., can solve the problems of pile anchors losing their force points, soil slipping between piles, thick sand layers, etc., and reduce the risk of collapse Probability, avoiding lateral extrusion and uplift, and ensuring the effect of construction safety
Inactive Publication Date: 2019-05-10
中地志诚建设科技有限公司
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Problems solved by technology
The medium-coarse sand in this process is very easy to collapse, often causing accidents, and the sand layer is very thick, and when the foundation pit is very deep, it is easier to collapse and cause accidents.
The cost of large-diameter pile-anchor support is very high, and in the process of hole formation, the hole collapses seriously and it is difficult to form a hole
Secondly, after the construction of slope protection piles and anchors, the sand layer between the two piles slides seriously, often causing the soil between the piles to slide completely, and the pile anchor loses its point of force, resulting in accidents.
Method used
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[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0041] refer to figure 1 and figure 2 , is the construction method of a kind of stepped miniature pile-anchor support body disclosed by the present invention, and concrete process is as follows:
[0042] First, according to the shape of the foundation pit in the construction drawings, holes 12 are drilled on the ground with drilling equipment. After the holes 12 are completed, the micro piles 13 are sequentially driven into each hole 13. The horizontal distance between adjacent micro piles 13 is 1.5-2.0 times the pile diameter, that is, when the pile diameter is 300mm, the horizontal distance between adjacent micro piles 13 should be 450-600mm. This layer of micro piles is called the first layer of micro piles 13 .
[0043] Then the connecting beam 14 is placed on the upper end of the micro pile 13, and it is welded with the micro pile 14.
[0044] Excav...
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The invention relates to a construction method of a stepped miniature pile anchor supporting body. The method comprises the steps that holes are punched in the ground in sequence according to the shape and size of a foundation pit, micro piles are driven into the holes, all the micro piles in the same horizontal plane are sequentially connected together through connecting beams, the foundation pitis excavated, anchor cables are driven into the side wall of the foundation pit and connected to the connecting beams, holes are punched in the bottom face of the foundation pit in sequence, and themicro piles are driven into the holes. A traditional large pile is replaced with the miniature pile, small equipment can be used for piling, damage to soil is low, and piling work amount can be reduced. Particularly, the construction mode that the foundation pit is dug downwards repeatedly and reinforced layer by layer is adopted, and the probability that the foundation pit collapses can be effectively reduced.
Description
technical field [0001] The invention relates to the technical field of foundation pit construction in building construction, in particular to a construction method of stepped miniature pile-anchor support body. Background technique [0002] With the continuous development of the construction industry, the construction environment has also undergone tremendous changes, especially in places that were considered impossible to construct in the past, such as soft soil, easy to collapse and other soil and sand layers. After treatment, it can also be built on it. architecture. [0003] The foundation pit is the foundation of the building. Before excavation, the excavation plan should be determined according to the geological and hydrological data and the conditions of the buildings near the site, and waterproof and drainage work should be done. If the excavation is not deep, the side slope can be used to stabilize the soil slope, and the slope size is determined according to the r...
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IPC IPC(8): E02D17/04E02D5/74E02D5/22
Inventor 邓毅孙术伟
Owner 中地志诚建设科技有限公司