Construction method of static drilling root planting drainage pile

A construction method and technology of drainage piles, applied in sheet pile walls, soil protection, foundation structure engineering, etc., can solve the problem of affecting the bearing capacity and stability of prefabricated pipe piles, shortening the growth period of cement-soil strength, and slow growth of cement-soil strength To achieve the effect of accelerating cement curing speed, accelerating drainage consolidation, and shortening the growth cycle

Pending Publication Date: 2022-01-11
NINGBO UNIV
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the water content in the cement soil is too large when the static drilling and rooting pile construction method is used, the strength of the cement soil around the prefabricated pipe pile increases slowly, which will eventually affect the bearing capacity and stability of the prefabricated pipe pile. A construction method for static drilling and rooting drainage piles, which can vacuumize and drain the cement and soil around the pile, quickly reduce the moisture content of the cement and soil, and shorten the strength growth period of the cement and soil

Method used

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  • Construction method of static drilling root planting drainage pile
  • Construction method of static drilling root planting drainage pile
  • Construction method of static drilling root planting drainage pile

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Embodiment 1

[0032] The construction method of static drilling rooting drainage pile of embodiment 1 may further comprise the steps:

[0033] (1) Position the drill bit of the piling machine 1. After positioning, the drill bit starts to drill in the deep soft soil foundation 9. While drilling, the hole body generated by drilling is trimmed and the wall is protected;

[0034] (2) After the hole is drilled to the design elevation, the piling machine 1 opens the expansion wing to ream the hole. After the reaming is completed, the drill bit is inserted into the bottom of the hole, and the solidified cement slurry at the pile end is injected into the bottom of the hole through the grouting pipe and stirred evenly to form an outer surface. Pile end cement soil 2 with a diameter of 1.0 m;

[0035] (3) Rotate and lift the drill pipe while retracting and expanding the wings, and at the same time inject the solidified cement slurry into the hole through the grouting pipe and stir evenly to form a pi...

Embodiment 2

[0039] The difference between the static drilling and rooting drainage pile construction method of embodiment 2 and embodiment 1 is that in embodiment 2, there are multiple prefabricated pipe piles 4 used in step (4), and the prefabricated pipe piles at the bottom are Bamboo pile 10, during the pile sinking process, a plurality of prefabricated pipe piles 4 are sequentially sunk into the hole, and at the same time of pile sinking, binding straps 6 are continuously tied on both sides of the pile circumference of each prefabricated pipe pile 4 to vertically fix the drainage The board 5, the drainage board 5 symmetrically fixed on both sides of each prefabricated pipe pile 4 is two continuous drainage boards 5. In this embodiment, the bottom of each prefabricated pipe pile 4 is fixed with a pile connecting piece 41 , and the pile connecting piece 41 is used to connect the prefabricated pipe pile on the lower side of the prefabricated pipe pile 4 . like image 3As shown, each pie...

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Abstract

The invention discloses a construction method of a static drilling root planting drainage pile. Drainage plates are fixed around the prefabricated pipe pile while the pile is sunk, the prefabricated pipe pile and the drainage plates are brought into a foundation together, the layout of vertical drainage channels around the pile is completed, and the construction operation is convenient; a drainage pipeline is sealed by connecting the drainage plates with a ground vacuum pump; vacuum pumping and drainage are conducted through the vacuum pump, so that the water content of cement soil around the pile is rapidly reduced, the cement curing speed is increased, the cement soil strength increasing period is shortened, and the bearing capacity and stability of the prefabricated pipe pile are guaranteed; and vacuum negative pressure is favorable for accelerating drainage consolidation of soil around the pile and improving the strength and rigidity of the soil, so that the side friction resistance of the pile is improved, and the bearing capacity and deformation resistance of a pile foundation are enhanced. According to the construction method, the operation modes that the drainage plates are arranged around the pile to form the drainage channels and vacuum negative pressure is combined to accelerate the drainage consolidation of the soil around the pile and improve the side friction resistance and the bearing capacity of the pile foundation can also be applied to other pile planting construction.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a construction method for static drilling and rooting drainage piles. Background technique [0002] Prefabricated piles have the advantages of high pile strength, fast construction speed, guaranteed quality, easy inspection, and low cost, and are widely used in our country. There are two problems in prefabricated pile technology: one is the noise problem caused by piling, which limits the application of traditional prefabricated piles in some occasions; Significant excess static pore water pressure, which leads to insufficient bearing capacity of pile foundation and long-term settlement problems. [0003] In order to solve the problems in the construction of traditional prefabricated piles, Japan developed the implanted pile construction method characterized by low vibration, low noise and no soil squeezing effect in the 1990s. This method is to drill holes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D7/00E02D5/50E02D3/10
CPCE02D7/00E02D5/50E02D3/10
Inventor 张日红邓岳保毛伟赟
Owner NINGBO UNIV
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