Construction device for pile splicing of existing pile foundation in soil

Abstract

The invention discloses a construction device for pile splicing of an existing pile foundation in soil. The position of the existing pile foundation and the pile top elevation are determined, and thepile top exceeds the concrete placing height; a manual hole digging manner is adopted to carry out soil excavating, and a brick shaft lining is arranged; excavating to the placing exceeding portion ofthe existing pile foundation is achieved, laitance breaking of the placing exceeding portion is achieved, breaking is carried out until the fresh dense concrete is achieved, and it is ensured that the main rib length exposing of the existing pie foundation meets the requirement; the bit expansion type is adopted in the manual hole digging pile end; a pile supplementing portion steel reinforcementcage is put down, and is welded with the existing pile foundation main ribs; the pile supplementing portion concrete is poured and is sufficiently subject to compaction vibration. The device solves the construction problem of pile splicing of the existing pile foundation below the ground, compared with the traditional treatment method, the large-area soil excavating, earthwork backfilling and concrete pouring amount can be reduced, the protection for the foundation soil can be greatly formed, safety and reliability are achieved, and the construction cost is reduced.

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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