CN106523004A - Rigid-after-flexible feet-lock bolt combined supporting device and installation method - Google Patents

Abstract

The invention discloses a combination support device and installation method of soft and then rigid locking foot anchor rods, including two flexible and then rigid locking foot anchor rods and a U-shaped joint lock located at the end of the rod. The U-shaped joint lock connects the two Two first soft and then rigid locking foot anchors are connected together to form an integrated support structure; the free end of the locking foot anchor is provided with an elastic hemisphere and nut that can move back and forth along the axis of the anchor, and the elastic hemisphere can absorb Part of the energy of the deformation of the steel arch is fixed by tightening the nuts to provide a support method that is soft first and then rigid; the U-shaped joint lock consists of two L-shaped round tubes installed on the end of the anchor rod, wherein The free end of one round tube is provided with a nut body, and the end of the other round tube is provided with a bolt matched with the nut body, and the two round tubes are connected to form a U-shaped joint lock.

Description

A combination support device and installation method of lock-foot-bolt combination support device which is soft first and then rigid

technical field

The invention belongs to the technical field of tunnel construction support, and relates to a combination support device and an installation method of a lock-foot-bolt combination support device which is flexible first and then rigid.

Background technique

When the tunnel passes through the weak ground, due to the poor self-stabilization ability of the weak surrounding rock, it is very easy to undergo large deformation during the construction process, resulting in cracking of the initial support and distortion of the steel arch frame, which will bring hidden dangers to the construction and future safe operation. The locking foot bolt has the characteristics of effectively controlling the settlement of the steel arch and improving the integrity of the supporting structure, so it is widely used in the construction of tunnels with weak surrounding rocks. However, in the current construction process, the lock-foot anchor and the steel arch are directly welded together. When subjected to a certain surrounding rock pressure, the welding strength of the welded part is far less than the bearing capacity limit of the steel arch and the lock-foot anchor. , leading to the premature loss of the supporting effect of the locking foot anchor; and the locking foot anchor only provides rigid support, and cannot form an integrated support structure with adjacent anchors, resulting in ineffective control of the deformation of the steel arch. very ideal.

Contents of the invention

In order to overcome the shortcomings of the traditional lock-foot anchor, the present invention provides a lock-foot-bolt combined support device and installation method which are flexible first and then rigid.

Technical scheme of the present invention is:

A combined support device for locking feet and anchors that is flexible first and then rigid, comprising two anchor bolts that are soft first and then rigid and a U-shaped joint lock located at the end of the rods. The rigid locking foot anchor rods are connected together to form an integrated support structure; the free end of the locking foot anchor rod is provided with an elastic hemisphere and a nut that can move back and forth along the axis of the anchor rod, and the elastic hemisphere It can absorb part of the energy of the deformation of the steel arch, and fix it by tightening the nuts, providing a support method that is soft first and then rigid;

The U-shaped joint lock includes two L-shaped round tubes installed on the end of the anchor rod, wherein the free end of one round tube is provided with a nut body, and the end of the other round tube is provided with a The nut body matches the bolt, and the two round pipes are connected to form a U-shaped joint lock.

Further, the end of the round pipe is threadedly connected to the anchor rod, and an internal thread that matches the outer thread of the anchor rod is provided inside the round pipe; the round pipe is in close contact with the elastic hemispherical hex nut through the screw , to provide support for it.

Further, the anchor bolts with locking feet are inserted into different anchor holes and are parallel to each other.

Further, the two L-shaped circular tubes are arranged symmetrically up and down or left and right.

Further, the nut bodies and bolts are welded to the corresponding round tubes.

Further, the nut body is a solid columnar structure with external threads; the bolt is a hollow columnar structure with internal threads inside the columnar structure, and the internal threads and The external threads cooperate with each other.

Further, the nut bodies and bolts are welded to the corresponding round tubes.

The specific installation method is as follows:

Insert one lock-foot anchor in the same steel arch into the anchor hole filled with anchoring agent through drilling, and place the other lock-foot anchor in the other anchor hole in the same way; along the anchor hole Rotate the movable elastic hemisphere and the hexagon nut at the free ends of the two lock-foot anchor rods in the same direction until they cannot be rotated;

Install an L-shaped round tube on the rod end of one locking foot anchor rod, install another L-shaped round tube on the rod end of the other locking foot rod, and rotate the two L-shaped round tubes until they are in close contact with the hex nut;

Screw the nut body of the free end of one L-shaped round tube into the bolt of another L-shaped round tube, so as to connect the two L-shaped round tubes into one, forming a U-shaped joint lock, and finally the two locking foot anchor rods are connected with The U-shaped joint lock forms an integrated support structure.

Compared with the traditional locking foot anchor, the advantages of this device are:

The creative use of the support method of first softness and then rigidity greatly enhances the support effect of the lock-foot anchors; the setting of the U-shaped joint lock at the rod end connects two lock-foot anchors in the same steel arch An integrated support structure improves the integrity and bearing capacity of the support, effectively controls the deformation of the steel arch, and ensures the construction and operation safety of the tunnel.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is the schematic diagram of this combined supporting device;

Figure 2 is a schematic diagram of the bolt;

Fig. 3 is a schematic diagram of a hex nut body;

In the figure: 1 anchor rod head, 2 anchor rod, 3 elastic hemisphere and hexagonal nut, 4 round pipe, 5 bolt, 6 hexagonal nut body, 7 round pipe.

detailed description

Below in conjunction with accompanying drawing 1,2 and example the present invention is further described.

The overall structure of the present invention is shown in Figure 1. The combined supporting device of the lock foot anchor rod that is soft first and then rigid includes two first soft and then rigid lock foot anchor rods 2 and a U-shaped joint lock located at the rod end. The U-shaped joint lock connects two anchor rods that are soft first and then rigid to form an integrated support structure.

Among them, the anchor head 1 of the lock foot anchor is fixed in the anchor hole, and the free end is provided with an elastic hemisphere and a hexagonal nut 3 that can move back and forth along the axis of the anchor, and the elastic hemisphere can absorb the steel arch. Part of the energy of the deformation of the frame is fixed by tightening the hexagonal nut, providing a support method that is soft first and then rigid;

The U-shaped joint lock includes two L-shaped round tubes 4 installed on the anchor rod end, wherein the free end of one round tube 4 is provided with a hex nut body 6, and the end of the other round tube 7 is provided with a The bolt 5 matched with the hex nut body 6 described above, the two round pipes 4, 7 are connected to form a U-shaped joint lock.

Specifically, as shown in FIG. 1 , the nut body 6 and the bolt 5 are welded on the respective corresponding round pipes; the positions of the nut body 6 and the bolt 5 can be exchanged.

Wherein the concrete structure of nut body 6, bolt 5 is as shown in Figure 2, 3; Nut body 6 is a columnar structure, is provided with external screw thread on its outside; Described bolt 5 is a hollow columnar structure, in columnar structure An internal thread is arranged inside, and the internal thread and the external thread cooperate with each other.

Further, the ends of the round pipes 4, 7 and the anchor rods are all connected by threads, and the inner threads of the round pipes 4, 7 are provided with the external threads of the anchor rods; the round pipes 4, 7 are threaded along the anchor After screwing in the direction of the rod hole, it will be in close contact with the hexagon nut to provide support for it.

Further, the two locking foot anchor rods are inserted into different anchor holes and are parallel to each other.

Further, the two L-shaped round pipes 4 and 7 are arranged symmetrically up and down or left and right.

The specific installation method is as follows:

Insert one anchor bolt in the same steel arch into the anchor hole filled with anchoring agent through the drill hole, and install the other anchor bolt in the other anchor hole in the same way, along the anchor hole Rotate the movable elastic hemisphere and the hexagon nut 3 at the free end of the anchor rod until it cannot be rotated.

Install a 1# L-shaped round pipe 4 at the end of one lock foot anchor rod, install a 2# L-shaped round pipe 7 at the other end, and rotate until the L-shaped round pipe is in close contact with the hex nut 3.

Rotate outward and insert the hexagonal nut body 6 at the free end of the 1#L-shaped round pipe 4, and then insert the bolt 5 into the hexagonal nut body 6, thereby connecting the 1#L-shaped round pipe 4 with the 2#L-shaped round pipe 7 As a whole, a U-shaped joint lock is formed, and finally the two locking foot anchor rods and the U-shaped joint lock form an integrated support structure.

The elastic hemisphere described in the present invention is similar to a sealing ring structure, its main function is to absorb part of the energy of the deformation of the steel arch, and it is tightly fitted on the anchor rod.

In the present invention, the elastic hemisphere and the hexagon nut are in contact with each other and are not connected. They are two independent parts. The hexagon nut is rotated and tightened to make the elastic hemisphere and the hexagon nut closely contact each other to form an integrated first flexible Just after supporting the structure.

To sum up, the present invention creatively adopts the support method of first softness and then rigidity by adding elastic hemispheres and hexagonal nuts, which greatly enhances the support effect of the locking foot bolt; the U-shaped joint lock at the rod end The two lock-foot anchors in the same steel arch frame are connected into an integrated support structure, which improves the integrity and bearing capacity of the support, effectively controls the deformation of the steel arch frame, and ensures the construction safety and operation of the tunnel. Safety.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (7)

1. A combined support device for locking feet and bolts that is soft first and then rigid, is characterized in that it includes two soft and then rigid locking feet anchors and a U-shaped joint lock positioned at the rod end, and the U-shaped joint lock Connect two anchor bolts that are soft first and then rigid to form an integrated support structure; the free end of the anchor bolt is provided with an elastic hemisphere and a nut that can move back and forth along the axis of the anchor, The elastic hemispherical body can absorb part of the energy of the deformation of the steel arch, and is tightened and fixed by the nut, providing a support method that is soft first and then rigid; The U-shaped joint lock includes two L-shaped round tubes installed on the end of the anchor rod, wherein the free end of one round tube is provided with a nut body, and the end of the other round tube is provided with a The nut body matches the bolt, and the two round pipes are connected to form a U-shaped joint lock. 2. As claimed in claim 1, the combined supporting device of locking feet and anchor rods that is soft first and then rigid, is characterized in that, the two L-shaped round pipes are connected with the anchor rods by threads, and in the L The inside of the shaped round tube is provided with an internal thread matched with the external thread of the anchor rod. 3. The combined supporting device of soft first and then rigid locking foot and anchor rods according to claim 1, wherein the locking foot anchor rods are inserted into different anchor holes and are parallel to each other. 4. The combined supporting device of locking feet and anchor rods that is flexible first and then rigid as claimed in claim 1, wherein the two L-shaped round tubes are arranged symmetrically up and down or left and right. 5 . The combined supporting device of soft first and then rigid locking foot and anchor rods according to claim 1 , wherein the nut body and bolts are welded to the respective corresponding round pipes. 6 . 6. The combined supporting device of locking feet and anchor rods that is flexible first and then rigid as claimed in claim 1, wherein the nut body is a solid columnar structure, and an external thread is provided outside it; The bolt is a hollow columnar structure, and an internal thread is provided inside the columnar structure, and the internal thread and the external thread cooperate with each other. 7. The installation method of the combination support device of locking feet and anchor rods that is soft first and then rigid according to claims 1-6, characterized in that, Insert one lock-foot anchor in the same steel arch into the anchor hole filled with anchoring agent through drilling, and place the other lock-foot anchor in the other anchor hole in the same way; along the anchor hole Rotate the movable elastic hemispheres and nuts at the free ends of the two locking foot anchor rods until they cannot be rotated in the same direction; Install an L-shaped round tube on the rod end of one lock-foot anchor rod, install another L-shaped round tube on the rod end of the other lock-foot anchor rod, and rotate the two L-shaped round tubes until they are in close contact with the hex nut; Screw the nut body of the free end of one L-shaped round tube into the bolt of another L-shaped round tube, so as to connect the two L-shaped round tubes into one, forming a U-shaped joint lock, and finally two locking foot anchor rods It forms an integrated support structure with the U-shaped joint lock.