Jet grouting pile grouting construction process for underground shaft reinforcing
A construction technique, technology of jet grouting piles, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as incomplete formation of the bottom of jet grouting piles, easy blockage of grouting pipes, etc.
Inactive Publication Date: 2020-11-20
BEIJING MUNICIPAL CONSTR
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] Aiming at the deficiencies of the prior art, the present invention provides a grouting construction technology for jet grouting piles for the reinforcement of underground excavation shafts, which solves the problem that the existing jet grouting pile grouting pipes are easily blocked and the bottom of the jet grouting piles is not completely formed. The problem
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment
[0026] An embodiment of the present invention provides a construction technique of jet grouting pile grouting for underground excavation shaft reinforcement, including the following steps:
[0027] S1. The drilling rig is in place: the drilling rig needs to be placed flat on the solid ground next to the drilling hole on the construction site, and the drill pipe of the drilling rig is aligned with the center of the hole;
[0028] S2. Drilling and lowering the pipe: first test the grouting pipe, check the high-pressure water and compressed air injection of the grouting pipe and whether the sealing rings of each part are closed, then start the drilling rig, let the drill pipe start to drill down, and drill while drilling One side of the hole is inserted downward into the grouting pipe. During the process of lowering the pipe, the inner end of the tank grouting pipe is delivered with a low-pressure water pressure of 1 MPa to punch the hole and spray until the grouting nozzle is low...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a jet grouting pile grouting construction process for underground shaft reinforcing, and relates to the field of jet grouting pile grouting processes. The jet grouting pile grouting construction process for underground shaft reinforcing comprises the following steps that S1, a drilling machine is in place, wherein the drilling machine needs to be flat placed on the firm andsolid ground beside a construction site drilled hole, and a drill rod of the drilling machine is aligned to the center of a hole site; and S2, a pipe is tripped into the drilled hole, wherein a grouting pipe is subjected to jetting testing firstly, the jetting condition of grouting pipe high-pressure water and compressed air is checked, whether sealing rings at all positions are closed or not is checked, then the drilling machine is started, the drill rod starts to drill the hole downwards, the grouting pipe is inserted downwards while the hole is drilled, low-pressure water is conveyed to theinner end of the grouting pipe in the pipe tripping process at the same time for flushing the hole and being sprayed downwards. According to the jet grouting pile grouting construction process for underground shaft reinforcing, the problem that an existing jet grouting pile grouting pipe is likely to be blocked, and forming of the bottom of a jet grouting pile is incomplete is solved, the construction rate is increased, and the construction cost is reduced.
Description
technical field [0001] The invention relates to the field of jet grouting pile grouting technology, in particular to a jet grouting pile grouting construction technology used for the reinforcement of underground excavation shafts. Background technique [0002] A shaft is a well-shaped pipe standing upright on the wall of a cave, which is actually a kind of collapse funnel. It is square, strip-shaped or irregularly circular in planar outline. The walls of the well are steep and almost upright. Shafts are widely used in water conservancy and hydropower projects for water intake, water diversion, ventilation, slag removal, and gas supply. Shaft construction has the characteristics of small footprint and less interference with surrounding construction. However, the shaft construction space is small, the construction period is long, there are many climbing and side operations, and the traffic is inconvenient, which leads to prominent safety risks in shaft construction. Shafts ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/04E02D5/46
CPCE02D5/46E02D15/04E02D2250/003
Inventor 蔡志勇杨祥亮吕金彪李星晨王越张建珍李文新王牧月唐永起戴星皓张晟源姜宁宁郑文宇魏闻博商涛高枫张然陈进财宋磊王佳男韩翔宇王伟张达丛迪苏钰博刘博
Owner BEIJING MUNICIPAL CONSTR