Diagonal cable pile pulling method and diagonal cable pulling pile system

An oblique cable and anchor cable technology, applied in sheet pile wall, construction, infrastructure engineering and other directions, can solve the problems of large investment in lifting equipment, difficult to achieve construction environment, uneven force, etc., to improve the success rate of promotion, reduce Lifting force requirements, the effect of improving efficiency

Active Publication Date: 2022-06-07
南京水科院瑞迪科技集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Impact pile breaking method and full-casing wear-reducing extraction method; these two pile-extraction technologies mainly rely on full-casing drilling rigs and large cranes, so the requirements for the construction site are relatively high. The construction site has a large area and there is no clear height limit on the upper part of the site. However, the actual construction environment is difficult to achieve
[0005] 2) The method of static pressure pile extraction with full casing. This method uses steel casing and combined with spraying high-pressure water and high-pressure bentonite slurry to remove the surrounding soil of the pile, and then pulls the pile. However, the process is more complicated and the actual time is longer. , especially for the pullout of multiple piles next to each other cannot be applied
[0006] 3) Directly connect the pile head steel bar in the cast-in-place pile with the pulling pile, and apply force gradually until the pile is pulled out. However, the steel bar in the existing cast-in-place pile has low strength, unreliable welding, and uneven force, and it is easy to pull out the cast-in-place pile. The pile is pulled out, which is not allowed in the pile pulling construction
[0008] It can be seen that in the existing pile pulling technology, the investment of resistance around the pile and pulling equipment is large, the construction process is complicated, and the construction time is long

Method used

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  • Diagonal cable pile pulling method and diagonal cable pulling pile system
  • Diagonal cable pile pulling method and diagonal cable pulling pile system
  • Diagonal cable pile pulling method and diagonal cable pulling pile system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The method for pulling out the pile with the inclined cable in this embodiment is as follows: figure 1 , figure 2 and image 3 shown, including the following steps:

[0044] 1) After investigation and pretreatment, the top of the pile 1 to be pulled is exposed, and at the same time, multiple high-strength anchor cable materials 2 and lifting equipment are installed;

[0045] The pile 1 to be pulled out in this embodiment can be a friction pile buried in the soil, a partially rock-socketed end bearing pile, or an occlusal pile, a cap pile and a driven pile buried at a certain depth below the surface, and so on. The head of a friction pile or end bearing pile is exposed to the ground.

[0046] The anchor cable material 2 in this embodiment can be made of metal hard or soft material. Made of hard metal, such as: bonded strands, prestressed strands, prestressed strands, high-strength steel wires, high-strength steel wire ropes or high-strength steel bars, etc.; also ca...

Embodiment 2

[0080] The method for pulling out the pile with oblique cables of the present embodiment is an improvement on the basis of the first embodiment, and the difference from the first embodiment is:

[0081] The total length of the pile to be pulled 1 to be lifted in this embodiment is 24m, the diameter of the pile is 1500mm, and the height of the pile to be lifted is 7-8m, accounting for 30% of the total length of the pile to be pulled 1 24m. After calculation, the design load of pile pulling force is 8000kN, and the check load is 10000kN.

[0082] In this way, the anchor cable material 2 adopts 4 bundles of CPS15A-12 shear force dispersion anchor cables. Each bundle of CPS15A-14 shear-distributed anchor cables adopts 14-φ15.24 high-strength, low-relaxation steel strands with a tensile strength of 1860MPa.

[0083] The hoisting equipment in this embodiment still adopts the piercing jack, and four sets of 4000kN piercing jacks are selected as the lifting power equipment. Consideri...

Embodiment 3

[0087] The method for pulling out piles with oblique cables in this embodiment is an improvement on the basis of Embodiment 1 and Embodiment 2. The difference from the above-mentioned embodiments is that in step 5) of this embodiment, the hoisting equipment is installed on the working platform 3 on the hoist or winch. The crane or hoist is installed on the reinforced concrete platform, the steel structure frame platform or the combined structure platform.

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Abstract

The invention relates to a cable-cable pile pulling method and a cable-cable pile pulling system, belonging to the technical field of pile removal in water conservancy, highway, railway, municipal, bridge and other projects. The cable pile pulling method includes the following steps: 1) exposing the top of the pile to be pulled after pretreatment; 2) drilling a certain number of first and second anchor holes on the top of the pile to be pulled; One end of the anchor cable material is lowered to the bottom of the first anchor hole and the second anchor hole, and the other end is exposed to the top of the pile to be pulled out; 4) Pour grout into the first and second anchor holes; 5) Pass the lifting equipment Pulling up the piles to be pulled out, in pulling out the piles, the other end of the anchor cable material fixed in the second anchor hole is lifted symmetrically or asymmetrically by lifting equipment at the same time to pull up the piles to be pulled out or make the piles to be pulled out laterally displaced. The inclined cable pile pulling method and the inclined cable pile pulling system can better meet the requirements of the lifting force of the pile pulling. At the same time, when the inclined cable is lifted asymmetrically, the horizontal force can be obtained, so that the horizontal displacement of the pile can be achieved, and the pile pulling resistance can be reduced. .

Description

technical field [0001] The invention relates to an oblique cable pile pulling method and an oblique cable pile pulling system, belonging to the technical field of pile removal in water conservancy, highway, railway, bridge, municipal and other projects. Background technique [0002] In the existing subway tunnel construction, it is necessary to lift the whole pile that affects the tunnel construction to a safe height, and the whole pile that affects the tunnel construction is about to be completely or partially pulled out. [0003] However, according to the applicant's knowledge, the existing domestic and foreign pile pulling technology mainly adopts the following methods: [0004] 1) Impact crushing method and full casing wear reduction and extraction method; these two pile extraction techniques mainly rely on full casing drilling rigs and large cranes, so they have higher requirements on the construction site, the construction site area is large, and there is no clear heig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D9/02
CPCE02D9/02
Inventor 刘海祥柯敏勇金初阳刘璨祁峰曹俊华吴银坤鲁小涛成超
Owner 南京水科院瑞迪科技集团有限公司
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