Lattice pile foundation and construction method thereof

Abstract

The invention relates to a pile structure foundation and construction thereof, and in particular relates to a lattice pile foundation which is rapid in construction speed, short in construction period, low in cost and excellent in whole mechanical property and a construction method thereof. The lattice pile foundation comprises underground foundation piles (2) and an overground foundation (1) connected at the top ends of the foundation piles, wherein the foundation piles (2) are mutually connected through underground diaphragm walls (3) to form an underground foundation of an integral structure; and the underground foundation is formed by taking the foundation piles (2) as nodes, the underground diaphragm walls (3) which are continuously arranged from the earth surface downward as connection bodes, and lattice structure bodies which are formed by the foundation piles (2) and the underground diaphragm walls (3) and have a reticular cross section as basic units and jointly connecting and expanding. The construction method of the lattice pile foundation comprises the following six steps: a, carrying out construction paying-off and positioning; b, punching foundation pile holes; c, slotting in segments; d, installing reinforcement cages; e, pouring in segments; and f, forming a lattice pile foundation.

Description

technical field [0001] The invention relates to a pile structure foundation and its construction, in particular to a lattice pile foundation and a construction method thereof. Background technique [0002] In the field of engineering, the foundation is to ensure the safety of buildings and bridge foundations, and to avoid foundation deformation that endangers the safety and stability of the superstructure. The foundations usually used in engineering are concrete enlarged foundations and pile foundations; pile foundations include such as deep-mixed cement-soil piles, high-pressure rotary jet piles, channel steel sheet piles and bored piles, steel pipe driven piles, concrete driven piles, etc.; In house construction, raft foundations and box foundations and their composite structures with pile foundations are usually used to meet the requirements of bearing capacity. However, these foundations have the following disadvantages: [0003] (1) The piles are isolated and cannot f...

AI Technical Summary

Problems solved by technology

[0003] (1) The piles are isolated and cannot form a large area of ​​interconnection underground to form a complete whole. Therefore, uneven settlement of buildings, bridges, etc. often occurs, resulting in cracking or tilting damage of the superstructure

[0004] (2) The contact between the pile and the surrounding rock mass is only based on the side wall of the pile, so the contact area is very small, so the friction bearing capacity of the pile is very small

[0005] (3) The piles are independent of each other, so that the volume of each pile is large, the construction speed is slow, the construction period is very long, the amount of materials used is large, and the cost is high

[0006] (4) Both the raft foundation and the box foundation need to excavate the foundation completely; the pouring thickness of the raft foundation is large, and the overall bending strength is insufficient; the box foundation needs to be backfilled after construction, and the load is uneven; both of them have a large amount of work , the construction time is long, the input materials are large, and the cost is high

Images