Prefabricated square pile for supporting deep foundation pit and side slope and pile splicing method of prefabricated square pile

Abstract

The invention discloses a prefabricated square pile for supporting a deep foundation pit and a side slope and a pile splicing method of the prefabricated square pile. The prefabricated square pile comprises a solid prefabricated square pile body, the prefabricated square pile is provided with a plurality of anchor cable holes vertical to the pile body of the prefabricated square pile along the length direction, and the plurality of anchor cable holes are all positioned on the central line of the prefabricated square pile, and the anchor cable holes do not interfere with main reinforcements andwinding reinforcements of the prefabricated square pile. The anchor cable holes are threaded holes, the inner diameter of each anchor cable hole is 180 mm, and the distance between every two adjacentanchor cable holes is 2000-4000 mm. The cross section of the prefabricated square pile is square, hoop-wrapping joints with certain lengths are reserved at two ends of the prefabricated square pile,the end faces of the two ends of the prefabricated square pile are provided with butt-joint end steel plates and butt-joint hoop plates matched with the butt-joint end steel plates and the hoop-wrapping joints, and the butt-joint hoop plates are wrapped and tightly attached to the hoop-wrapping joints and the butt-joint end steel plates. The cross sections of the hoop-wrapping joints and the butt-joint end steel plates are square, end plate holes are formed in each butt-joint end steel plate, and the butt-joint hoop plates are formed by fixedly connecting two L-shaped steel plates with the same specification in a butt joint way. The prefabricated square pile meets the strength requirement, has low cost, and is safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and relates to a prefabricated square pile used for deep foundation pit and side slope support and a pile connection method thereof. Background technique [0002] With the rapid development of urban construction, due to the limitations of upper space development, the development of underground complexes and large urban underground spaces has become the mainstream. This requires that the buried depth of the foundation of the construction project begins to increase continuously, and the height of the slope becomes larger. The foundation pit support and slope support have become important geotechnical engineering issues. [0003] Cast-in-situ piles are generally used to solve this problem, but the construction period of cast-in-situ piles is long, the quality is not guaranteed, waste of resources, pollution of the environment and high cost. Prefabricated piles are widely used becau...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a prefabricated square pile for deep foundation pit and slope support, to solve the problem that the current use of steel waist beams as the force transmission member of the prestressed anchor cable and pile will reduce the anchor cable and pile row. The overall force of the system is extremely unfavorable to the stability and deformation control of the foundation pit

[0009] Another purpose of the embodiment of the present invention is to provide a pile connection method for prefabricated square piles for deep foundation pit and slope support, which is fast in construction, meets the joint strength requirements, low in cost, and is safe and environmentally friendly, so as to solve the current single The length of the prefabricated piles cannot meet the design depth requirements of the foundation pit, and the existing pile connection method has low joint strength and is not environmentally friendly

Images