CN216305947U

CN216305947U - Self-advancing pipe shed for advance support of soft and broken rock mass of underground cavern

Info

Publication number: CN216305947U
Application number: CN202121573861.0U
Authority: CN
Inventors: 刘俊峰; 郝俊锁; 李勇; 张英旭; 段江鹏; 舒建梅; 李培富; 赵润华; 孙家波
Original assignee: China Railway 18th Bureau Group Co Ltd; Second Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Current assignee: China Railway 18th Bureau Group Co Ltd; Second Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-04-15
Anticipated expiration: 2031-07-12

Abstract

The utility model discloses a self-advancing pipe shed for the advance support of soft and broken rock masses in underground caverns, which comprises a pipe shed rod body (2) processed by common thick-wall steel pipes, a diamond drill bit (1) and a grouting end enclosure (3), wherein the length of the pipe shed can be flexibly adjusted according to actual requirements. The utility model designs a self-advancing pipe shed for the advance support of soft and broken rock mass in an underground cavern, which is self-processing and simple to manufacture; the construction safety and the construction quality in the underground engineering excavation process are ensured.

Description

Self-advancing pipe shed for advance support of soft and broken rock mass of underground cavern

Technical Field

The utility model relates to a self-advancing pipe shed, in particular to a self-advancing pipe shed for the advance support of weak and broken rock masses in underground caverns.

Background

In the underground engineering construction, the excavation is often carried out in weak broken rock masses, so that the collapse possibility exists, and particularly, the collapse probability is higher in the water inrush zone and the excavation process of an underground cavern. When the pipe shed is excavated at the positions, the traditional pipe shed construction needs to adopt a pipe-following drilling machine to carry out the construction of a leading pipe shed or adopt a mode of firstly drilling and then inserting pipes. The pipe following cost adopted by the first construction method is high; the second construction method is easy to cause hole collapse, so that the pipe shed rod body cannot be inserted.

SUMMERY OF THE UTILITY MODEL

The problems of high construction cost, hole collapse and the like of the traditional pipe shed in underground cavern excavation construction are solved. The utility model provides a self-advancing pipe shed for the advance support of weak and broken rock masses in underground caverns, which can be processed by self; the defects of traditional pipe shed construction under the condition of soft and broken rock masses of the underground cavern are effectively overcome, and the construction safety and the construction quality in the underground engineering excavation process are guaranteed.

The technical scheme adopted by the utility model is as follows: a self-advancing pipe shed for the advance support of soft and broken rock masses in underground caverns comprises a rod body which is formed by connecting common thick-wall steel pipes through positive and negative screw threads, wherein the length of the rod body can be flexibly changed according to actual needs; slurry diffusion holes are formed in the periphery of the rod body at equal intervals; the front end of the rod body is welded with a diamond drill bit; the end of the rod body is connected with a grouting seal head, so that a complete pipe shed rod body is formed.

Further, a from advancing formula pipe shed that is used for soft broken rock mass advance support of underground cavern, including diamond bit, the pipe shed body of rod and grout head, the diamond bit passes through the screw thread with the one end welded connection of the pipe shed body of rod, the other end of the pipe shed body of rod is connected with the grout head.

Furthermore, the diamond drill comprises four diamonds, and the diamonds are welded on two mutually perpendicular directions of the end part of the rod body of the pipe shed respectively.

Furthermore, the pipe shed rod body is formed by connecting pipe joints with the length of 3m into a whole through positive and negative screw threads, and slurry diffusion holes are formed around the pipe joints at equal intervals.

Furthermore, the grout head is formed by thick wall steel pipe, steel sheet, advance thick liquid pipe and blast pipe welding, and the thick wall steel pipe is the major structure of grout head, advances thick liquid pipe and arranges in the tip of thick wall steel pipe side by side with the blast pipe and is provided with and ends the thick liquid switch, is equipped with the screw thread on the thick wall steel pipe.

The utility model relates to a self-advancing pipe shed for the advance support of weak and broken rock mass in an underground cavern.

1. The length of the rod body can be flexibly manufactured according to actual needs.

2. The rod body pipe joints are connected by adopting positive and negative screw threads, so that the installation and extension in a limited space are facilitated.

3. The front end of the rod body is welded with a diamond drill bit, the rod body is used as a drilling rod, the hole pushing and drilling process is optimized, and hole collapse is avoided.

4. All adopt self-made materials, simple manufacture process, convenient and flexible installation and low cost.

Drawings

FIG. 1 is a schematic longitudinal structural section of the apparatus of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from direction a-a;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of an exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

As shown in figures 1 and 2, the self-advancing pipe shed for the advance support of the weak and broken rock mass of the underground cavern comprises a pipe shed rod body 2, a diamond drill bit 1 and a grouting end enclosure 3. During construction, the pipe shed rod body 2 and the diamond drill bit 1 are used as a drilling bit and a drill rod, drilling is completed once, and the pipe shed rod body 2 and the diamond drill bit 1 are not taken out any more.

The pipe shed rod body 2 is formed by connecting pipe sections with the same specification through positive and negative screw threads, and the length of the pipe shed rod body can be manufactured according to actual needs. After the drilling of the single pipe joint is finished, the lower joint pipe is installed in a screw thread connection mode, and the drilling is continued until the drilling reaches a preset length.

And slurry diffusion holes 7 are formed in the periphery of the pipe shed rod body 2 at equal intervals so as to ensure the grouting diffusion effect of the pipe shed.

Diamond bit 1 and the welding of pipe shed body of rod 2, in the pipe shed is executed and is done the in-process, and diamond bit 1 undertakes the task of drilling broken rock mass, does not take out after the pore-creating, for disposable consumption.

The grouting seal head 3 is formed by welding a thick-wall steel pipe 10, a steel plate 6, a grout inlet pipe 4 and an exhaust pipe 5, and the grouting seal head 3 is connected with the tail pipe of the pipe shed rod body 2 through a screw thread 9. When the pipe shed is grouted, the flow of the grout is controlled by adjusting a grout stop switch 11 connected with the grout inlet pipe 4 and the exhaust pipe 5.

Examples

The utility model provides a from advancing formula pipe shed that is used for soft broken rock mass advance support of underground cavern, includes that the pipe shed body of rod 2, diamond bit 1, the grout head 3 that adopt ordinary thick wall steel pipe to process into constitute, pipe shed length can be according to actual need nimble adjustment. The utility model relates to a self-advancing pipe shed for the advance support of weak and broken rock masses in underground caverns, which is self-processing and simple to manufacture; the construction safety and the construction quality in the underground engineering excavation process are ensured.

Claims

1. The utility model provides a from advancing formula pipe shed for soft broken rock mass advance support of underground cavern, includes diamond bit (1), the pipe shed body of rod (2) and grout head (3), its characterized in that, diamond bit (1) and the one end welded connection of the pipe shed body of rod (2), the other end and the grout head (3) of the pipe shed body of rod (2) are connected through screw thread (9).

2. The self-advancing pipe shed for the advance support of the weak and broken rock mass of the underground cavern as claimed in claim 1, characterized in that the diamond bit (1) is composed of four pieces of diamond and is welded at two mutually perpendicular directions of the end part of the pipe shed rod body (2).

3. The self-advancing pipe shed for the advance support of the weak and broken rock mass of the underground cavern as claimed in claim 1 is characterized in that the rod bodies (2) of the pipe shed are connected into a whole by pipe joints through positive and negative screw threads (8), and slurry diffusion holes (7) are formed around the pipe joints at equal intervals.

4. The self-advancing pipe shed for the advance support of the weak and broken rock mass in the underground cavern is characterized in that the grouting end enclosure (3) is formed by welding a thick-wall steel pipe (10), a steel plate (6), a slurry inlet pipe (4) and an exhaust pipe (5), the thick-wall steel pipe (10) is the main structure of the grouting end enclosure (3), the slurry inlet pipe (4) and the exhaust pipe (5) are arranged at the end part of the thick-wall steel pipe (10) side by side and provided with a slurry stop switch (11), and threads are arranged on the thick-wall steel pipe (10).