Construction method for rigid pile composite foundation

Abstract

The invention discloses a construction method for a composite foundation. The method mainly comprises the following steps that firstly, rigid pile point positions and granular pile point positions in a construction area are determined; secondly, at the rigid pile point positions, construction of rigid piles is carried out; thirdly, at the granular pile point positions, construction of granular piles is carried out; and fourthly, a mattress layer is laid on the surface of a construction site, and the composite foundation is formed. Through combination of down-hole dynamic consolidation and rigid pile construction, losses of side extrusion of dynamic compaction inside the hole can be greatly reduced, the down-hole dynamic consolidation is improved, and bearing force of earth among the piles and the granular piles is fully exerted. Therefore, according to the method, the bearing force between the earth among the piles and the granular piles is fully utilized, under the condition that the number of the rigid piles is small, the composite foundation can achieve the bearing force obtained only through many rigid piles, the cost is reduced, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a composite foundation construction method. Background technique [0002] At present, in the composite foundation, the rigid pile bears most of the load. Since the diameter of the rigid pile itself is relatively small, the lateral resistance of the soil on the side of the rigid pile cannot be fully utilized. In order to meet the requirements of the bearing capacity, the rigid pile has to be reduced. The distance between the piles will increase the number of rigid piles used, which will increase the construction cost, and if the site has a deep covering layer with a relatively low bearing capacity above the bearing layer determined by the design, the length of the pile body will be too long , resulting in great waste and poor adaptability. [0003] To sum up, on the premise of meeting the bearing capacity requirements, how to effectively save costs and avoid waste o...

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Problems solved by technology

[0004] In view of this, the technical problem to be solved by the present invention is to provide a rigid pile composite foundation construction method in order to overcome the shortcomings of the above-mentioned composite foundation construction method. The lateral resistance of the body, that is, the bearing capacity of the soil between the piles, reduces the number of rigid piles used, shortens the length of the rigid piles, and achieves the purpose of saving costs and avoiding waste of resources

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