Construction method for pile foundation

Abstract

The invention discloses a construction method for a pile foundation. The construction method for the pile foundation comprises the steps that a set of special mechanical construction device having power is installed on the outer side of a rigid pile; after the rigid pile with the special mechanical construction device installed on the outer side is placed in place, sinking of the rigid pile is started by means of a ground pile frame, the pile sinking process is controlled, and the special mechanical construction device having power sinks underground on the outer side of the rigid pile along with the rigid pile after sinking of the rigid pile is started; and in the sinking process of the rigid pile or in the pulling process of the special mechanical construction device, the special mechanical construction device is used for conducting drilling construction on foundation soil around the pile or conducting modification construction on the foundation soil around the pile or conducting replacing construction on the foundation soil, so that sinking of the rigid pile is achieved under the condition that small force is exerted on the ground pile frame, and modified soil including cemented soil or replacement soil containing concrete or mortar can be formed around the rigid pile.

Description

technical field [0001] The invention relates to a construction method of a pile foundation. Background technique [0002] The existing rigid-flexible composite pile construction method generally adopts first to complete the construction of the flexible pile (such as cement-soil mixing pile), and then complete the construction of the rigid pile within a few hours after the construction of the flexible pile is completed. The main shortcomings of this construction method: 1. Because the flexible pile and the rigid pile are constructed twice, this construction method cannot fully guarantee the same core of the flexible pile and the rigid pile; 2. The power of the existing flexible pile construction equipment is generally set at On the frame, the power is transmitted to the sprinkler head or the stirring shaft through the tens of meters long axis that frictionally rotates in the soil, not only the loss of kinetic energy is large, but also the power configuration of the equipment ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a construction method for pile foundations, which solves the problem of constructing on the outside of rigid piles, and implements construction on the outside of rigid piles through this construction method to achieve a relatively small pile frame on the ground. The pile sinking of rigid piles can be carried out under low force, and the modified soil including cement soil or the replacement soil including concrete or mortar can be formed around the rigid pile pile. This construction method improves the construction efficiency and construction quality, and saves costs.

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