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Double-protective barrel impact pile-forming method at silt rock soil layer

A technology of double casing and silt, applied in sheet pile wall, construction, infrastructure engineering and other directions, can solve the problems of difficult hole forming, shrinkage of pile body, block stone jamming and other problems, so as to improve the efficiency of pile forming and avoid The effect of reducing diameter and filling factor

Inactive Publication Date: 2017-02-08
浙江省东阳第三建筑工程有限公司
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Problems solved by technology

However, it is unavoidable to bring the upper stones into the lower silt layer during the impact hole construction, and the phenomenon of block stone jamming will occur after the hole is formed by the rotary drilling machine, which is difficult to form the hole, and it is very difficult to pull out the casing after the pile is formed. It is easy to cause quality problems such as pile shrinkage and collapse

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  • Double-protective barrel impact pile-forming method at silt rock soil layer

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Embodiment Construction

[0028] The present invention will be further described below by specific examples.

[0029] figure 1 It is a process diagram of an embodiment of a method of impacting piles with double casings between silt and stone-soil layers of the present invention. First, as figure 1 As shown in a, at the pile position in the foundation, the pile hole 1 is formed by impacting the construction machine tool, and the punching depth is the thickness of the rocky soil layer between the silt; then, as figure 1 As shown in middle b, the steel outer casing 2 is sunk into the pile hole, and several water injection pipes 3 can be welded on the outside of the steel outer casing, and the upper opening can be fixed reliably; then, as figure 1 As shown in c, continue the construction of the pile body punching until the design depth, after the first hole cleaning, hang the steel inner casing 4, and fix the upper mouth reliably; then, if figure 1 Shown in middle d, lower the pile body reinforcement cag...

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Abstract

The invention relates to a double-protective barrel impact pile-forming method at a silt rock soil layer. The method is characterized in that after holes are formed in the silt rock soil layer through impact, steel outer protective barrels are buried inside the holes in a sleeving manner; after the holes are cleaned, steel inner protective barrels are embedded inside the steel outer protective barrels; and after pile bodies inside the steel inner protective barrels are constructed, the steel outer protective barrels are pulled out. According to the double-protective barrel impact pile-forming method, the hole forming difficulty of a mixed soil layer of rock and flow plastic silt can be effectively reduced, the pile forming efficiency is improved, the pile forming quality of pile body concrete and durability of the pile bodies are guaranteed, and the quality problems like diameter shrinkage and collapse of the pile bodies due to the fact that the protective barrels are pulled out are avoided.

Description

technical field [0001] The invention relates to a pile-forming method by impact, in particular to a pile-forming method by impacting a rock-soil layer sandwiched with silt. Background technique [0002] Tidal flats are widely distributed in the coastal areas of our country, and the development and utilization of tidal flat resources has attracted people's attention, and many construction projects have emerged on tidal flats. However, the tidal flats are mostly distributed with deep silt soil layers, and engineering measures such as rock filling are required to separate them from the influence of sea water. Due to the low bearing capacity of flow plastic silt soil layer, construction projects on tidal flats, in order to ensure that the foundation has a reliable bearing capacity, pile foundation engineering is often used. [0003] When constructing pile foundations on mud flats with rocky soil layers, impact machinery is often used to first penetrate the mixed soil layer with...

Claims

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Application Information

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IPC IPC(8): E02D5/38E02D5/60E02D5/66
CPCE02D5/38E02D5/60E02D5/665
Inventor 马健民王建宏王彦理程勇俊
Owner 浙江省东阳第三建筑工程有限公司
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