CN206256920U - Deformed steel bar high-pressure slip casting stock - Google Patents

Abstract

The utility model discloses a deformed steel bar high pressure slip casting stock, stock body and slip casting pipe, the one end of stock body is equipped with the kink, and the slip casting pipe passes through dead lever and stock body fixed connection, has the blast pipe through ligature rope swing joint on the outer wall of stock body and slip casting pipe, and the blast pipe extends to set up at the end of stock body, and the slip casting intraductal is equipped with the pressurization stopper. The utility model has the advantages of, the slip casting liquid is under the effect of pressurization grouting pump and pressurization stopper, make the thick liquid can be quick accomplish the diffusion in the rock stratum drilling, fully pack the joint between the rock stratum, the crack, make the strutting of broken rock stratum more stable, the effectual tensile strength and the reply ability that improve the stock body, effectual gas outgoing drilling with the drilling, the emergence of bubble phenomenon has been formed after having avoided the thick liquid solidification, the structure sets up more rationally, the slip casting mode has been improved, the effectual supporting work that has improved broken rock stratum, the potential safety hazard in the mine tunnel use has been avoided.

Description

A threaded steel high-pressure grouting anchor rod

technical field

The utility model belongs to the technical field of rock formation anchoring engineering in the aspects of tunnel construction, side slope treatment, foundation pit arm protection, mine mining, etc., and specifically relates to a threaded steel high-pressure grouting anchor rod.

Background technique

In weak rock strata, broken rock mass and deep well construction, due to ground pressure failure, the roadway convergence deformation is often serious, and even the roadway or chamber collapses and is abandoned; the underground engineering geological disclosure and investigation results of a copper mine show that the mine underground rock The properties are mainly pyroclastic sedimentary rocks and volcanic rocks such as various types of tuff, tuff, rhyolite, basalt, etc. The mine development roadways are mainly arranged in various types of tuff and basalt. The fault structure is developed in the area, and the rock mass is extremely broken and eroded Fractured zones and weak interlayers are more common. After excavation of roadways in tuff, roof caving often occurs along bedding at the initial stage. With the prolongation of exposure time, bulges and uplifts occur around the roadway, and the convergence deformation is very serious, even As a result, the entire roadway is closed. When the roadway is excavated in the basalt, due to the development of joints and fissures, the rock mass is extremely broken. The initial damage feature is the roof collapse of the roadway. As the depth increases, the ground pressure increases, resulting in more prominent convergence and deformation of the roadway. According to the characteristics of roadway deformation convergence in different lithologies and periods, sprayed anchor mesh support is used in the early stage of construction, and steel frame support or concrete is used in the middle stage. Support, but these support forms did not achieve the expected support effect in the end. With the redistribution and release of surrounding rock stress in the supporting roadway, the deformation of the steel support, the rupture of the concrete support layer, the convergence of the two gangs, and finally the scrapping of the entire roadway are caused.

With the intensification of infrastructure construction such as transportation and energy, in mining tunnels, basements and slopes, as an anchoring technology that can give full play to the self-stabilization ability of rock mass, it has developed rapidly, and the amount of anchor rods is increasing day by day, showing a broad However, there are many problems in the current use of anchor bolts. Ordinary mortar anchor bolts often adopt the process of grouting first and then inserting reinforcement. The anchor bolt structure is unreasonable. It is more difficult to ensure the fullness of grouting when the construction is inclined upward or the length is greater than 3.0m, often resulting in the actual effective anchorage area is far from the design requirements, and there is currently no effective method for testing the fullness of the mortar. The pull-out test can not determine whether this kind of full-length bonded anchor meets the design requirements. Therefore, the currently widely used mortar anchors leave deep hidden dangers, and what is more dangerous is that such hidden dangers are usually not noticed by people; Ordinary mortar anchors generally do not have backing plates and nuts, and are generally hollow anchors, which cannot provide supporting plate force after the anchor is installed. The role of the anchor is completely passive. Only when the rock mass moves, the anchor can It is not conducive to controlling the early loosening and displacement of the rock mass after excavation; and when drilling holes in weak and broken rock mass and other unfavorable formations, after pulling out the drill pipe, the phenomenon of hole collapse often occurs. Ordinary mortar bolts poor coping ability.

Utility model content

The purpose of this utility model is to provide a threaded steel high-pressure grouting anchor rod to solve the unreasonable setting of the anchor rod structure in the prior art, the incorrect grouting method, and potential safety hazards. The anchor rod is not provided with backing plates and nuts, and It is a hollow bolt, which cannot provide sufficient support plate force and bolt tension, and the bolt has poor coping ability when facing weak and broken rock mass.

In order to achieve the above purpose, the technical solution of the utility model is: a threaded steel high-pressure grouting anchor, including the anchor body 1 and the grouting pipe 2, one end of the anchor body 1 is provided with a bending part 3, and the grouting pipe 2. The fixed rod 4 is fixedly connected with the anchor body 1. The outer wall of the anchor body 1 and the grouting pipe 2 is movably connected with an exhaust pipe 6 through a binding rope 5. The exhaust pipe 6 is extended at the end of the anchor body 1. , The grouting pipe 2 is provided with a pressure plug 7 .

Preferably, the inner diameter of the pressurizing plug 7 gradually decreases from the side of the grouting pipe 2 to the side of the bolt body 1 .

Preferably, one end of the grouting pipe 2 is fixedly connected with a plug fixing ring 8 , and the plug fixing ring 8 is connected with the plug 10 through a connecting rope 9 .

Preferably, at least three protrusions 12 are provided on the side of the bent portion 3 in contact with the rock formation 11 , and a tamping platform 13 is provided on the other side of the bent portion 3 .

Preferably, an exhaust valve 14 is fixedly connected to one end of the exhaust pipe 6 .

Preferably, the bolt body 1 is threaded steel.

Preferably, the grouting pipe 2 is fixed at the opening of the borehole 16 by cement 15 .

The utility model has the advantages that: under the action of the pressurized grouting pump and the pressurized plug, the grouting liquid can quickly complete the diffusion in the rock drilling holes, fully fill the joints and cracks between the rock layers, and make the broken rock layers The support of the bolt is more stable, and the bolt body fully exerts the tensile capacity and friction of the rebar. After the grout solidifies, it becomes a whole with the bolt body, so that the bolt body and the grout and the grout and the rock surface in the drill hole are more fully in contact. , the bent part is fully in contact with the outer wall of the rock formation, which effectively improves the tensile capacity and coping capacity of the bolt body. When the grout enters the borehole, the exhaust pipe can effectively discharge the gas in the borehole to avoid The formation of bubbles after the grout is solidified, the structure setting is more reasonable, the grouting method of the grouting anchor is improved, the support work of the broken rock formation is effectively improved, and the safety hazard in the use of the mine roadway is avoided.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, a threaded steel high-pressure grouting anchor includes an anchor body 1 and a grouting pipe 2. One end of the anchor body 1 is provided with a bending part 3, and the grouting pipe 2 is connected to the anchor through a fixing rod 4. The rod body 1 is fixedly connected, and the outer wall of the anchor rod body 1 and the grouting pipe 2 is movably connected with an exhaust pipe 6 through a binding rope 5, and the exhaust pipe 6 is extended at the end of the anchor rod body 1, and the grouting pipe 2 Pressurization plug 7 is arranged.

In order to further increase the grout pressure during grouting, the inner diameter of the pressure plug 7 is gradually reduced from the grouting pipe 2 side to the anchor body 1 side.

In order to block the grouting pipe 2 after the grouting is completed, to prevent the overflow of the grout, a plug fixing ring 8 is fixedly connected to one end of the grouting pipe 2, and a connecting rope 9 and a plug 10 are connected to the plug fixing ring 8. connect.

In order to make the bolt body 1 more tightly matched with the outer wall of the rock formation 11 and improve the stability of the bolt body 1, at least three protrusions 12 are provided on the side where the bent portion 3 is in contact with the rock formation 11, and the bent portion 3 The other side on the other side is provided with tamping platform 13.

In order to facilitate the exhaust of the exhaust pipe and prevent the overflow of the slurry after the slurry in the borehole 16 is filled, an exhaust valve 14 is fixedly connected to one end of the exhaust pipe 6 .

In order to make the tensile capacity and coping ability of the bolt body 1 better and stronger, the bolt body 1 is set to be rebar.

In order to facilitate grouting and prevent the bolt body 1 from slipping down from the borehole 16 , the grouting pipe 2 is fixed at the opening of the borehole 16 through cement 15 .

During use, drill corresponding number of boreholes 16 on the inner wall of the rock formation 11 according to the specific needs of the mine roadway, insert the bolt body 1 in the boreholes 16, and smash the platform 13 by knocking on the bent portion 3 to The protrusion 12 on the bending part 3 is smashed into the rock formation 11, and the grouting pipe 2 is fixed at the opening of the borehole 16 by cement 15 to ensure its stability during grouting. After the cement is solidified, start the grouting operation, remove the plug 10 from the grouting pipe 2, connect the grouting pump to the grouting pipe 2, open the exhaust valve 14 on the exhaust pipe 6, and the grout is pressurized Under the action of the plug 7, the inside of the borehole 16 is quickly filled, and the gas in the filling process is discharged out of the borehole 16 through the exhaust pipe 6. When the slurry is found to overflow from the exhaust pipe 6, the exhaust valve 14 is closed to complete the process. Support work for borehole 16.

The above are only preferred examples of the utility model, and the technical solutions of the utility model are not limited thereto. It should be pointed out that for those of ordinary skill in the art, under the technical inspiration provided by the utility model, as Common knowledge in the field can also make other equivalent modifications and improvements, which should also be regarded as the protection scope of the present utility model.

Claims (7)

1. a kind of screw-thread steel high pressure slurry filling anchor bolt, it is characterised in that：Including bolt body（1）And Grouting Pipe（2）, the anchor pole sheet Body（1）One end be provided with kink（3）, the Grouting Pipe（2）By fix bar（4）With bolt body（1）It is fixedly connected, it is described Bolt body（1）And Grouting Pipe（2）Outer wall on pass through tie（5）It is connected with blast pipe（6）, the blast pipe（6） It is extended on bolt body（1）End, the Grouting Pipe（2）Inside it is provided with pressurization plug（7）.

2. a kind of screw-thread steel high pressure slurry filling anchor bolt as claimed in claim 1, it is characterised in that：The pressurization plug（7）Internal diameter From Grouting Pipe（2）One lateral bolt body（1）Side tapers into.

3. a kind of screw-thread steel high pressure slurry filling anchor bolt as claimed in claim 2, it is characterised in that：The Grouting Pipe（2）One end It is fixedly connected with plug retainer ring（8）, the plug retainer ring（8）It is upper to pass through connecting rope（9）With plug（10）Connection.

4. a kind of screw-thread steel high pressure slurry filling anchor bolt as claimed in claim 3, it is characterised in that：The kink（3）With rock stratum （11）The side being in contact is provided with least 3 projections（12）, the kink（3）Opposite side be provided with rammer and pound platform（13）.

5. a kind of screw-thread steel high pressure slurry filling anchor bolt as claimed in claim 4, it is characterised in that：The blast pipe（6）One end It is fixedly connected with air bleeding valve（14）.

6. a kind of screw-thread steel high pressure slurry filling anchor bolt as claimed in claim 5, it is characterised in that：The bolt body（1）It is spiral shell Line steel.

7. a kind of screw-thread steel high pressure slurry filling anchor bolt as claimed in claim 6, it is characterised in that：The Grouting Pipe（2）By water Mud（15）It is fixed on drilling（16）Aperture at.