CN210087318U

CN210087318U - Underwater vertical shaft lining device

Info

Publication number: CN210087318U
Application number: CN201920190259.5U
Authority: CN
Inventors: 赵振龙; 范鹏; 王一鑫; 李梦龙; 潘健; 谢温祥
Original assignee: Liaoning Water Resources And Hydropower Survey And Design Research Institute Co Ltd (formerly Known As Liaoning Water Resources And Hydropower Survey And Design Research Institute)
Current assignee: Liaoning Water Resources And Hydropower Survey And Design Research Institute Co Ltd (formerly Known As Liaoning Water Resources And Hydropower Survey And Design Research Institute)
Priority date: 2019-02-12
Filing date: 2019-02-12
Publication date: 2020-02-18
Anticipated expiration: 2029-02-12

Abstract

The underwater shaft lining device is mainly characterized by comprising a lining steel pipe, a slurry inlet pipeline, a slurry return pipeline, a geomembrane bag slurry inlet pipeline and a steel pipe outer wall slurry stopping geomembrane bag. The method mainly solves the problems that the traditional underwater lining grouting construction is inconvenient and the quality is not easy to guarantee. After the steel pipe is placed in an underwater excavation vertical shaft, the lining construction can be formed on water through one-time pressure irrigation. Grouting the geomembrane bag on the outer side of the pipe wall to form a grout stop plug body, and performing cement mortar circulating pressure grouting on a cavity between the steel pipe and the excavated surface to form a lining structure.

Description

Underwater vertical shaft lining device

Technical Field

The utility model relates to a shaft lining cutting device under water can make things convenient for doing of shaft lining cutting under water, promotes the lining cutting quality.

Background

The water intake of hydraulic engineering can adopt the shaft structure sometimes to be connected with diversion tunnel. The lining of the traditional underwater vertical shaft is usually implemented by placing a steel pipe in a vertical shaft which is drilled and excavated in advance and has the diameter of 20cm-50cm larger than the outer diameter of the steel pipe, and then directly extending a grouting pipe to the bottom of a gap between the steel pipe and surrounding rocks for grouting. The grouting mode has the defects of non-compact filling of the gap between the steel pipe and the surrounding rock, serious slurry leakage at the bottom and the top of the steel pipe, uncertain grouting finishing time and the like due to no slurry stopping measures and small grouting pressure, and the lining construction quality is difficult to effectively ensure.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a shaft lining cutting device under water can effectively improve lining cutting construction quality.

The device is characterized in that geomembrane bags for stopping grout are respectively arranged at the top and the bottom of the outer wall of the steel pipe, and a grout inlet pipeline, a grout return pipeline and a geomembrane bag grout inlet pipeline are intensively arranged along the vertical inner wall of the steel pipe; annular grouting grooves are formed in the top and the bottom of the inner wall of the steel pipe and the position of the geomembrane bag, and holes are formed in the steel pipe of the annular grouting groove and used for grouting or grout returning. The grout inlet pipeline is connected with the 2 nd annular grouting groove at the bottom, the grout return pipeline is connected with the 2 nd annular grouting groove at the top, and the grout inlet pipeline of the geomembrane bag is connected with the grouting groove at the topmost and bottommost parts.

And respectively connecting the grouting pipe and the slurry return pipe on the ground to the grouting pipeline, the slurry return pipeline and the slurry inlet pipeline of the geomembrane bag on the steel pipe. When the steel pipe is placed, the geomembrane bag is in a shriveled state, and the placement of the steel pipe is basically not influenced. Before the steel pipe lining is backfilled and grouted, the geomembrane bag is grouted to form a grout stop plug body, and then backfilling and grouting are carried out. The formed grout stopping plug body can effectively prevent grout from leaking out of the top and the bottom of a gap between the steel pipe and the surrounding rock; because of the slurry stopping device, the circulating grouting process can be adopted for backfill grouting, and because of pressure grouting, the slurry can also effectively fill surrounding rock cracks in a certain range during cavity grouting, thereby greatly improving the lining quality. After the forming, the steel pipe, the lining and the surrounding rock are stressed jointly, and the structural mechanical property is excellent.

Drawings

FIG. 1 is a main structure diagram of the device, and FIGS. 2-5 are typical sectional views of a steel pipe at top and bottom annular grouting grooves, and the main structure is as follows.

Numbering	Name of structure	Description of the invention
			1	Steel pipe
2	Slurry inlet pipeline
			3	Slurry return pipeline
4	Geomembrane bag slurry inlet pipeline
			5	Geomembrane bag
6	Annular groove	Rectangular cross section
			7	Grouting hole	Diameter of not less than 5cm

Detailed Description

The main using method of the device is as follows: evacuating air in the membrane bag of the structure 5, and placing the steel pipe of the structure 1 into the drilled vertical shaft; grouting the membrane bag of the structure 5; and backfilling and grouting the steel pipe. Wherein the film bag grouting adopts pure pressure grouting, the filling pressure is 0.2-0.3 MPa, and the filling speed is 10-15 m for carrying out the year/h; and the steel pipe backfill grouting adopts circulating grouting, and the grouting pressure is 0.3-0.5 Mpa. The grouting material adopts cement mortar, the pouring cement-cement ratio is 0.5:1, and the sand mixing amount of the cement mortar is not more than 200 percent of the weight of the cement. And (4) stopping the slurry standard: when the grouting amount of the membrane bag is less than or equal to 0.4L/min, pausing for 2min, and continuously paying attention for 10 min; and (5) backfilling and grouting, and continuously grouting for 10min after the slurry return pipe returns slurry.

Claims

1. The utility model provides a silo lining cutting device under water, its characterized in that mainly by circular inside lining steel pipe, advance the thick liquid pipeline, the pipeline of returning the thick liquid, the thick liquid pipeline is advanced to the geomembrane bag, the ring channel, cyclic annular grout stopping geomembrane bag constitutes, wherein the ring channel is located the top of steel pipe inner wall, bottom and geomembrane bag position, the steel pipe at ring channel position sets up the grout hole, it is connected with 2 annular grooves in bottom to advance the thick liquid pipeline, the pipeline of returning the thick liquid is connected with 2 annular grout grooves in top, the geomembrane bag advances the thick liquid pipeline and is connected with the ring channel of topmost and bottommost.