Composite foundation construction method

A construction method and composite foundation technology, which is applied in the direction of foundation structure engineering, building, sheet pile wall, etc., can solve the problems of increased engineering cost and increased engineering quantity, and achieve the effects of simple process, reduced engineering cost, and simple production

Active Publication Date: 2005-07-20
北京波森特岩土工程有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Undoubtedly, these two methods will increase the amount of work and increase the cost of the project.

Method used

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  • Composite foundation construction method

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Embodiment Construction

[0029] As the construction method of the concrete pile of an embodiment of the present invention, it comprises the following steps, at first, as figure 1 As shown in a, the drilling rig is in place, and the hole is drilled auger at the pile position; then, as shown in figure 1 As shown in b, auger drilling to the conventional pile end bearing layer; then, as figure 1 As shown in c, continue to drill to a certain depth; after that, if figure 1 As shown in d, while pumping the hydraulic mixed filler into the borehole, the drill pipe is lifted; then, as figure 1 As shown in e, the drill pipe is pulled out of the surface, and the pressure filling is completed; then, as shown in figure 1 As shown in f, excavate the soil body around the top of the pile to form a pile top diameter expansion part connected with the pile body, and pour the pile top diameter expansion part; finally, as figure 1 As shown in g, a mattress layer is laid on top of the pile.

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Abstract

The purpose of the invention is to provide a kind of construction method to reinforce foundation, we could get the compound foundation through that method quickly and simply, raise the displacement frequency of the common CFG stake consumedly through the increment the expanding parts of stake crest, to reduce the quantity of the stake, economize the engineering expenditure significantly, economize the material, simplified the construction. The construction method includes following steps:1) prepare the drill machine, helix drill a hole to the destined depth in foundation at the place of stake;2) send the water rigidity admixture filler using the pump simultaneously, simultaneously, form a body of stake through raising the drilling pole to the earth's surface;3) the form locates to the coping of stake, for the used of increment of interface of mat layer at the expanding parts of stake crest;4)Build the mat layer at the superficial of expanding parts of stake crest foundation at the peak surface and surface of groundwork.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to reinforcement treatment of building foundations. Background technique [0002] In the foundation reinforcement treatment of buildings, two methods are usually used: pile foundation and composite foundation. Composite foundation reinforcement treatment means that the soil at a certain depth under the foundation is better and the soil layer is relatively stable, but the strength and deformation cannot meet the requirements of the upper load. In order to exert the bearing capacity of the soil, people adopt reinforcement methods, such as gravel piles , CFG piles, cement soil piles and other construction methods. Among them, screw grouted cement fly ash gravel piles, namely CFG piles, are currently used more. [0003] The mechanical characteristic of the CFG pile is that the pile and the soil jointly bear the upper load, and the calculation formula of the foundation bearing capacity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E02D27/12
Inventor 王继忠
Owner 北京波森特岩土工程有限公司
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