Construction device for existing pile foundation pile connection in soil

Abstract

The invention discloses a construction device for existing pile foundation pile connection in soil. The position of an existing pile foundation and the standard height of a pile top and the height ofa pile top super-filled concrete are determined;the soil is excavated by manual hole digging, and a bricking protection wall is set up; a super-filled part of the existing pile foundation is excavated,the super-filled part is subjected to laitance breaking, a fresh and compact concrete is broken, and it is ensured that the exposure length of a main rib of the existing pile foundation meets the requirements; the end of a manual hole diggingpile adopts an enlarged head form; a steel reinforcing cage of a pile adding part is laid down and welded with the main rib of the existing pile foundation;the concrete of the pile adding part is poured and fully vibrated and compacted. The device solves the construction problem of the existing pile foundation pile connection underground. Compared with atraditional treatment method, the device can reduce the large area of earth excavation, earthwork backfilling and concrete pouring,greatly form the protection for the foundation soil, be safe and reliable, and reduce construction costs.

Description

technical field [0001] The invention relates to a construction device for connecting piles to pile foundations, in particular to a construction device for connecting piles to existing pile foundations inside the soil. Background technique [0002] The pile foundation is an ancient and common foundation form. The function of the pile is to transfer the load of the superstructure to the hard and less compressible soil or rock around the pile and at the pile end by using its stiffness much greater than that of the pile, so as to reduce the Settlement, making buildings (structures) meet the requirements of normal use functions and earthquake resistance. The pile foundation is widely used because of its high bearing capacity, good stability, small settlement and differential settlement, fast settlement stability, good seismic performance, and adaptability to various complex geological conditions. In addition to being mainly used to bear vertical compressive loads in general indu...

AI Technical Summary

Problems solved by technology

[0006] 1. In order to reduce the ground elevation to the fixed elevation of the existing piles, a large area of ​​earthwork excavation is required. If the excavation depth is too large, the support work for the foundation pit will be required. This will greatly increase the construction cost and greatly increase the construction cost. Uneconomical

[0007] 2. After the pile connection is completed, earthwork backfilling is required to return the ground elevation to the design elevation. This will also increase the construction cost. At the same time, earthwork backfilling in the exposed area of ​​the pile head is quite difficult.

[0008] 3. The excavation and backfilling of the earthwork seriously damage the original state of the foundation soil, greatly disturb the foundation soil, and bring many disadvantages to the stability, settlement and differential settlement of the building foundation in the future, and the seismic performance

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