Construction method of non-excavation in-situ repair of wellbore of inspection well
An in-situ repair and construction method technology, which is applied to the repair of infrastructure, artificial islands, water conservancy projects, etc., can solve problems such as soil disturbance around wells, local landslides, and difficult construction of well ring lifting, and reduce the number of pullouts. The difficulty of construction, the effect of reducing difficulty and improving construction efficiency
Active Publication Date: 2021-10-26
SHENZHEN FUTIAN JIANAN CONSTR GRP +1
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Problems solved by technology
Although this technology can realize the non-excavation repair of the wellbore, it is difficult to remove the well ring. When the diameter of the well ring is large, it will disturb the soil around the well and easily cause local landslides.
Method used
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Embodiment Construction
[0036] The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
[0037] refer to figure 1 As shown, the construction method of non-excavation in-situ repair of the wellbore of the inspection well includes the following construction steps:
[0038] 1) Construction preparation: verify the thickness and height of the existing shaft 1 and the newly poured shaft 2, and prepare the materials and devices required for construction;
[0039] 2) Guidance cutting of the existing wellbore: On the inner side wall of the existing wellbore ...
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The invention relates to a non-excavation in-situ repair construction method for an inspection well wellbore, comprising the steps of: 1) construction preparation; 2) guided cutting of the existing wellbore; 3) lifting and removal of the existing wellbore in blocks; 4) supporting of the wellbore formwork; 5) Concrete pouring of newly poured shaft; 6) Spraying maintenance of newly poured shaft. The beneficial effects of the present invention are: the present invention sets guide cutting grooves on the inner side wall of the existing wellbore, which can precisely control the cutting direction of the cutting chainsaw, and reduces the difficulty of cutting construction of the existing wellbore; The lateral pressure pipe is set in the soil around the wellbore outside the wellbore. Firstly, the cement slurry is injected into the soil around the wellbore through the lateral pressure pipe to apply top pressure to the existing wellbore block after cutting, and then the curved hanging plate is used to lift it out. The construction not only reduces the difficulty of pulling out the existing shaft, but also reduces the disturbance of the soil around the well caused by the lifting of the existing shaft.
Description
technical field [0001] The invention relates to a non-excavation and in-situ repair construction method for an inspection well wellbore, which can reduce the construction difficulty of existing wellbore cleaning, improve the construction quality and efficiency of newly poured wellbore pouring, and protect the construction environment. It belongs to the field of water supply and drainage engineering and is applicable to Inspection well restoration works. Background technique [0002] During the use of the inspection well, affected by factors such as rain and sewage erosion, local collapse and damage of the wellbore often occur, which will not only affect the force of the wellbore, but also adversely affect the surrounding environment. At present, excavation is usually the main method of wellbore restoration, which has a great impact on the construction environment. [0003] In the prior art, there is a non-destructive and quick repair machine and construction technology for ...
Claims
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IPC IPC(8): E02D37/00E02D29/12E02D15/04
CPCE02D15/04E02D29/125E02D37/00E02D2250/0007E02D2250/0023
Inventor 吴金兴吴晓峰吴晓斌
Owner SHENZHEN FUTIAN JIANAN CONSTR GRP