A pile foundation construction method

A construction method and pile foundation technology, which can be applied to foundation structure engineering, sheet pile walls, buildings, etc., can solve the problems of low single pile bearing capacity, low engineering cost, friction, impact, etc., to reduce transportation costs and improve load capacity , Improve the effect of construction quality

Inactive Publication Date: 2021-06-11
福建省育才建设发展有限公司
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AI Technical Summary

Problems solved by technology

[0003] Bored cast-in-situ piles have the characteristics of fast construction progress, low noise, good environmental conditions, low project cost, and are not subject to seasonal site restrictions. However, bored cast-in-place piles mainly rely on the side friction resistance of the pile body to bear external loads. The bearing capacity is low, especially when hoisting the steel cage in the borehole, the shaking of the steel cage will cause friction and impact on the wall of the borehole, which will cause the soil on the wall of the hole to be stripped and fall to the bottom of the hole , resulting in a large amount of virtual soil at the bottom of the hole, especially in the case of groundwater, there will be a thicker silt layer at the bottom of the hole. The existence of these virtual soil and silt layer makes the cast-in-place pile subsidence

Method used

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] refer to figure 1 , is a kind of pile foundation construction method disclosed by the present invention, comprises the following steps:

[0040] Step S1, construction preparation:

[0041] Step S1.1 Pre-construction preparation The clear water well should be dug in an area without piles, and the proximity to the mud pool can bring convenience for water replenishment. The mud pool should be dug in an area without engineering piles near the main building. Firstly, the bulldozer is used to level the site. After the equipment enters the site, installation and commissioning are carried out, and the piling sequence is determined according to the site construction conditions.

[0042] Step S1.2 Measure and stake out. After the site is leveled, make a measurement control network according to the design coordinate points, position according to the plane setti...

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Abstract

The invention relates to a pile foundation construction method, comprising step S1 of construction preparation, first leveling the site, determining the piling sequence, and then setting out on the site and preparing equipment for construction; step S2 of burying the casing; and step S3 of using a rotary excavator Drill into the hole; step S4 uses a flat bottom sand bucket to clear the hole, and step S5 uses construction machinery to lift the guide and lower it. During the lowering process, the guide should be as close as possible to the center of the drilling hole. Move the guides horizontally so that the guides are suspended on the casing, then put in a plurality of guides in turn, and make them evenly distributed on the casing, and then lower the reinforcement cage through the area surrounded by the guides; step S6, measure the sediment at the bottom of the hole , and determine whether secondary hole cleaning is required according to the design requirements; step S7, pouring underwater concrete; during the entire construction process, there is very little void soil falling to the bottom of the borehole, which effectively improves the load capacity of the cast-in-place pile.

Description

technical field [0001] The invention relates to the technical field of house construction, in particular to a pile foundation construction method. Background technique [0002] The pile foundation is an important part of the construction project, and it is also the foundation of the entire ground building. During the construction of the pile foundation, due to the influence of different areas and external factors, the construction methods of the pile foundation are mainly divided into three types: excavation Hole grouting piles, bored grouting piles, manual digging piles. [0003] Bored cast-in-situ piles have the characteristics of fast construction progress, low noise, good environmental conditions, low project cost, and are not subject to seasonal site restrictions. However, bored cast-in-place piles mainly rely on the side friction resistance of the pile body to bear external loads. The bearing capacity is low, especially when hoisting the steel cage in the borehole, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D13/06E02D13/08E02D13/04E02D5/38E02D5/68
CPCE02D5/38E02D5/68E02D13/04E02D13/06E02D13/08
Inventor 吴志成李祖培黄丰严
Owner 福建省育才建设发展有限公司
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