Pile foundation building slant rectification pile-cutting replacement limiting structure and construction method thereof

Abstract

The invention relates to a pile foundation building slant rectification pile-cutting replacement limiting structure and a construction method thereof. The limiting structure comprises an original pileto be cut off (1), jacks (5), a jack bearing platform, new piles (3), new pile bearing platforms (4) arranged on the new piles (3) and a reinforcement joint structure which enables the original pile(1) to continue to exert the bearing capacity after cutting. The new piles (3) are arranged in a foundation raft (7) in a penetrating mode. The vertical distance between the new pile bearing platforms(4) and the foundation raft (7) is determined by the required amount of slant rectification of the original pile, and the vertical distance between the new pile bearing platforms (4) and the jack bearing platform can ensure that the jacks are easily taken out after force unloading. The pile foundation building slant rectification pile-cutting replacement limiting structure not only can strictly control the settlement difference of a building, but also can effectively control the settlement speed, and can further maximize the bearing capacity of the original pile after cutting; and the jacks can be taken out and reused after the load is transmitted to the new pile bearing platforms, and the characteristics such as reasonable force, safety and reliability, low cost and easy construction areachieved.

Description

technical field [0001] The invention relates to the technical field of rectifying and reinforcing existing building foundations, in particular to a rectifying and intercepting pile underpinning and limiting structure for pile foundation buildings and a construction method thereof. Background technique [0002] As a common form of foundation, pile foundation is widely used in practical engineering. However, unlike the traditional view that uneven settlement and inclination rarely occur in pile foundation buildings, it is often affected by design, construction, There are many influences such as use and so on. For example: (1) During the design process, due to the unreasonable design and layout of the pile foundation or the design of the superstructure's main structure that emphasizes asymmetrical aesthetic art, the load exerted by the superstructure on the foundation will be uneven; (2) During the construction process, there is a lack of Due to reasons such as supervision and...

AI Technical Summary

Problems solved by technology

Although pile-cut underpinning technology has achieved many successes in rectifying pile-based buildings, there are still some problems: (1) It is difficult to control the settlement of pile-cut piles, especially when the required settlement is relatively large If the settlement is too small, the purpose of rectification cannot be achieved, and if the settlement is too large, the rectification will be excessive, so that the building will lean in the opposite direction, resulting in a new problem of rectification; (2) It is difficult to control the settlement speed during the pile cutting process, Especially when the required settlement is relatively large, it is easy to cause a sudden sinking of the building and cause a safety accident

[0004] In addition, although the original foundation piles still have a certain bearing capacity after being truncated, the bearing capacity is very limited, which is obviously a waste of resources

In this regard, the utility model with application number 2017208460341 proposes to set caps on the truncated piles and use jacks to control the sinking amount. However, in this solution, the jacks are always under stress and cannot be taken out. Using a large number of large jacks will inevitably make the project cost too expensive. At the same time, this measure does not use new piles around the original piles for underpinning, which will cause insufficient bearing capacity of the pile foundation and easily cause safety problems, so the practicability is not strong.

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