Grouting construction device for advanced exploring hole of top arch layer of main cavern

Abstract

The utility model discloses a main cavern top arch layer advanced manhole grouting construction device, which relates to the technical field of cavern construction, and comprises an anchor rod main body which is arranged in a manhole and is provided with a grouting cavity, a fixed block and a connecting ring which are arranged in the anchor rod main body in a sliding manner, an anchor rod drill bit is fixedly arranged at the head part of the anchor rod main body, and an external thread is arranged on the outer side of the tail end of the anchor rod main body; a grout outlet is formed in the outer side of the anchor rod body, an opening is formed in the side face of the anchor rod body, extending blocks are fixedly arranged on the two sides of the fixing block, an inner cavity is formed in the fixing block, through holes connected with the outside are formed in the two sides of the inner cavity, and a sliding baffle is arranged in the inner cavity. After grouting is conducted in a manhole through the anchor rod body, the fixing bolt is rotated to drive the connecting ring to move towards the inner side of the manhole, so that the extending block drives the fixing block to move inwards in the anchor rod body to compress cement paste in the manhole, the pressure of the cement paste reacts on the baffle at the moment, the baffle abuts against the through hole, and the cement paste is prevented from falling down.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a device for advanced exploratory grouting construction of the main tunnel arch layer. Background Technology

[0002] Oil reserves are mainly divided into two types: strategic reserves and commercial reserves. Based on the work experience of some domestic underground water-sealed caverns in the pre-feasibility and feasibility study stages, it is of great practical significance to carry out research on the excavation and support of the main cavern of underground caverns during the large-scale construction of underground water-sealed caverns in my country.

[0003] Before constructing the main tunnel arch layer, it is necessary to carry out advance exploratory grouting operation. The patent with announcement number CN212837889U discloses a recyclable advance grouting anchor cable for the tunnel face, which includes an anchor cable body formed by fixing and connecting multiple steel strands. A grouting pipe is tied to the side of the anchor cable body. The grouting pipe and the anchor cable body extend into the anchor cable support borehole at the tunnel face and are filled with an anchoring mortar layer injected by the grouting pipe.

[0004] The above-mentioned device requires waiting for the cement grout to solidify during use. When it is used to drill holes in the arch layer of the tunnel, the cement grout is prone to fall out of the drill hole due to its own weight, resulting in insufficient strength of the solidified cement grout. Therefore, we propose a pre-drilling grouting construction device for the arch layer of the main tunnel. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a pre-exploration grouting construction device for the main tunnel arch layer. After grouting is injected into the exploration hole through the anchor rod body, rotating the fixing bolt drives the connecting ring to move inward into the exploration hole. This, in turn, drives the fixing block to move inward within the anchor rod body through the extension block, compressing the cement grout in the exploration hole. At this time, the pressure of the cement grout reacts on the baffle, pressing the baffle against the through hole to prevent the cement grout from falling.

[0006] To solve the above-mentioned technical problems, this utility model solves the problem that cement slurry easily falls out of the probe hole during the grouting of the top arch layer through the following technical solution.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A grouting construction device for the pre-exploration borehole of the main tunnel arch layer includes an anchor rod body with a grouting cavity installed in the borehole, a fixing block and a connecting ring slidably installed in the anchor rod body. An anchor rod drill bit is fixedly installed at the head of the anchor rod body, and an external thread is provided on the outer side of the tail end of the anchor rod body. A fixing bolt with a protective pad is fixed on the thread of the external thread. Grout outlets are evenly distributed on the outer side of the anchor rod body, and symmetrically distributed openings are provided on the side of the anchor rod body. Extension blocks are fixed on both sides of the fixing block and slidably installed in the openings. An inner cavity is provided in the fixing block, and through holes connected to the outside are provided on both sides of the inner cavity. A baffle is slidably installed in the inner cavity to block the through holes near the tail end of the anchor rod body. The connecting ring is fixedly installed on the outer side of the protective pad of the fixing bolt and is connected to the outer side of the extension block.

[0009] Preferably, a compression spring is fixed inside the cavity. One end of the compression spring is fixed to the side of the baffle away from the tail end of the anchor rod body, and the other end is fixed to the inside of the cavity, so that the baffle is pressed against the through hole.

[0010] Preferably, the inner cavity is provided with evenly distributed auxiliary holes on the side away from the tail end of the anchor rod body. The auxiliary holes are located outside the compression spring to facilitate the passage of cement grout.

[0011] Preferably, the end of the baffle away from the compression spring is fixedly provided with an insert that fits into the through hole, thereby improving the baffle's blocking effect on the through hole.

[0012] Preferably, the connection between the insert and the through hole is provided with a matching tapered surface to improve the sealing effect of the through hole when the baffle is pressed against it.

[0013] Preferably, the inner side of the connecting ring is provided with an annular groove, and the extension block is slidably fitted into the annular groove, so that the extension block can move as the connecting ring rotates.

[0014] Preferably, the outer side of the connecting ring is fitted into the inner side of the probe hole to ensure a tight connection between the outer side of the connecting ring and the inner side of the probe hole.

[0015] Preferably, the outer thread of the external thread is provided with an auxiliary bolt to further limit and fix the fixing bolt.

[0016] Preferably, the protective pad of the fixing bolt is fixed with an anti-corrosion ring on the side near the probe hole to prevent external water stains from entering the anchor bolt body and corroding the anchor bolt body.

[0017] Preferably, the side of the connecting ring away from the fixing bolt has a chamfer to facilitate the connection ring entering the probe hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] After grout is injected into the probe hole through the anchor rod body, the fixing bolt is rotated to drive the connecting ring to move inward to the inside of the probe hole. This causes the fixing block to move inward within the anchor rod body through the extension block, compressing the cement grout in the probe hole. At this time, the pressure of the cement grout acts on the baffle plate, pressing the baffle plate against the through hole to prevent the cement grout from falling.

[0020] By installing a compression spring inside the cavity and an insert with a tapered surface on the outside of the baffle, the sealing effect of the baffle on the through hole is improved. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0024] Figure 3 This is a schematic diagram showing the connection between the connecting ring and the fixing block of this utility model;

[0025] Figure 4 This is a schematic diagram showing the connection between the anchor rod body and the fixing block of this utility model;

[0026] Figure 5 This is a partial cross-sectional view of the fixing block portion of this utility model;

[0027] Figure 6 This is a schematic diagram of the fixing block structure of this utility model.

[0028] Drawing number explanation: 1. Anchor bolt body; 2. Anchor bolt drill bit; 3. External thread; 4. Fixing bolt; 5. Grout outlet; 6. Fixing block; 7. Opening; 8. Extension block; 9. Inner cavity; 10. Through hole; 11. Baffle; 12. Connecting ring; 13. Compression spring; 14. Auxiliary hole; 15. Insert; 16. Conical surface; 17. Annular groove; 18. Auxiliary bolt; 19. Anti-corrosion ring. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0031] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or gear component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0032] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0033] Example:

[0034] Please see Figures 1-6 A grouting construction device for the pre-exploration borehole of the main tunnel arch layer includes an anchor body 1 with a grouting cavity set in the borehole, a fixing block 6 slidably set in the anchor body 1, and a connecting ring 12. The outer side of the connecting ring 12 is fitted with the inner side of the borehole to ensure the tightness of the connection between the outer side of the connecting ring 12 and the inner side of the borehole. The anchor body 1 is made of stainless steel, which is resistant to pressure, bending and wear. An anchor drill bit 2 is fixedly set at the head of the anchor body 1. An external thread 3 is provided on the outer side of the tail end of the anchor body 1. A fixing bolt 4 with a protective pad is fixed on the thread of the external thread 3. An anti-corrosion ring 19 is fixed on the side of the protective pad of the fixing bolt 4 near the borehole to prevent external water stains from entering the anchor body 1 and corroding the anchor body 1. An auxiliary bolt 18 is provided on the outer thread of the external thread 3 to further limit and fix the fixing bolt 4. A uniformly distributed grout outlet 5 is provided on the outer side of the anchor body 1. The grout outlet 5 is circular to improve the stress distribution of the grout outlet 5.

[0035] The anchor bolt body 1 has symmetrically distributed openings 7 on its side. Extension blocks 8 are fixedly mounted on both sides of the fixing block 6, and the extension blocks 8 slide within the openings 7. The width of the extension blocks 8 is equal to the width of the openings 7 to avoid gaps. The fixing block 6 has an inner cavity 9, with through holes 10 on both sides connecting to the outside. The diameter of the through holes 10 is smaller than the diameter of the inner cavity 9, restricting the range of motion of the baffle 11. A baffle 11 is slidably mounted within the inner cavity 9 to block the through holes 10 near the tail end of the anchor bolt body 1. A compression spring 13 is fixed within the inner cavity 9, with one end of the compression spring 13 connected to the baffle 11. The plate 11 is fixed on one side away from the tail end of the anchor bolt body 1, and the other end is fixed to the inside of the inner cavity 9. The baffle 11 is pressed against the through hole 10. The connecting ring 12 is fixed on the outside of the protective pad of the fixing bolt 4. The connecting ring 12 is connected to the outside of the extension block 8. The inner side of the connecting ring 12 is provided with an annular groove 17. The extension block 8 is slidably fitted into the annular groove 17. The width of the annular groove 17 is equal to the thickness of the extension block 8, so that the extension block 8 can move with the rotation of the connecting ring 12. The side of the connecting ring 12 away from the fixing bolt 4 is provided with a chamfer, so that the connecting ring 12 can enter the probe hole.

[0036] The following describes some embodiments of this application in detail with reference to the accompanying drawings:

[0037] Please see Figures 1-6 After grouting into the probe hole through the anchor body 1, rotating the fixing bolt 4 drives the connecting ring 12 to move inward into the probe hole, thereby driving the fixing block 6 to move inward within the anchor body 1 through the extension block 8, compressing the cement grout in the probe hole. At this time, the pressure of the cement grout reacts on the baffle 11, pressing the baffle 11 against the through hole 10 to prevent the cement grout from falling.

[0038] The inner cavity 9 has evenly distributed auxiliary holes 14 on the side away from the tail end of the anchor rod body 1. The auxiliary holes 14 are located outside the compression spring 13 to facilitate the passage of cement grout. When the compression spring 13 is squeezed and there is no gap, the cement grout enters the inner cavity 9 and flows out from the auxiliary holes 14, which will not affect the normal progress of grouting.

[0039] To prevent cement slurry from falling into the borehole, the implementation method of this application is described as follows:

[0040] First, a drilling machine was used to conduct advance exploration of the arch layer of the cavern.

[0041] Then, using the anchor drill bit 2 and the connecting ring 12, the anchor body 1 is placed in the probe hole, and grout is injected into the probe hole through the grouting cavity of the anchor body 1. The cement grout presses the pressure plate, compresses the compression spring 13, and flows in the inner cavity 9.

[0042] After grouting is completed, rotate the fixing bolt 4 to drive the connecting ring 12 to slide into the probe hole. This causes the fixing block 6 to move inward within the anchor body 1 via the extension block 8, squeezing the cement grout in the probe hole. The cement grout reacts on the baffle 11, causing the baffle 11 to press against the through hole 10. Rotate the auxiliary bolt 18 to limit and fix the position of the fixing bolt 4, thereby sealing the probe hole and preventing the cement grout in the probe hole from falling out.

[0043] like Figure 5 As shown, in some embodiments, in order to improve the blocking effect of the baffle 11 on the through hole 10, an insert 15 that fits into the through hole 10 is fixedly provided at the end of the baffle 11 away from the compression spring 13. At the same time, a tapered surface 16 that cooperates with each other is provided at the connection between the insert 15 and the through hole 10. The fitting of the tapered surface 16 and the insert 15 with the through hole 10 improves the sealing effect of the baffle 11 on the through hole 10 when it abuts against the through hole 10.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A device for grouting advanced exploration holes in the arch layer of the main tunnel, comprising: An anchor body (1) with a grouting cavity is installed in the test hole. An anchor drill bit (2) is fixedly installed at the head of the anchor body (1). An external thread (3) is provided on the outer side of the tail end of the anchor body (1). A fixing bolt (4) with a protective pad is threaded on the external thread (3). Grout outlets (5) are evenly distributed on the outer side of the anchor body (1). Its characteristic is that it further includes: A fixing block (6) is slidably disposed inside the anchor body (1). The anchor body (1) has symmetrically distributed openings (7) on its side. An extension block (8) is fixedly disposed on both sides of the fixing block (6). The extension block (8) is slidably disposed inside the opening (7). An inner cavity (9) is provided inside the fixing block (6). Through holes (10) connecting to the outside are provided on both sides of the inner cavity (9). A baffle (11) is slidably disposed inside the inner cavity (9) to block the through hole (10) near the tail end of the anchor body (1). A connecting ring (12) is fixedly disposed on the outside of the protective pad of the fixing bolt (4), and the connecting ring (12) is connected to the outside of the extension block (8).

2. The device according to claim 1, characterized in that: A compression spring (13) is fixedly installed inside the inner cavity (9). One end of the compression spring (13) is fixed to the side of the baffle (11) away from the tail end of the anchor rod body (1), and the other end is fixed inside the inner cavity (9).

3. The device according to claim 2, characterized in that: The inner cavity (9) is provided with uniformly distributed auxiliary holes (14) on the side away from the tail end of the anchor rod body (1), and the auxiliary holes (14) are located on the outside of the compression spring (13).

4. The device according to claim 3, characterized in that: The end of the baffle (11) away from the compression spring (13) is fixedly provided with an insert (15) that fits into the through hole (10).

5. The device according to claim 4, characterized in that: The insert (15) and the through hole (10) are provided with a tapered surface (16) that cooperates with each other.

6. The device according to claim 1, characterized in that: The inner side of the connecting ring (12) is provided with an annular groove (17), and the extension block (8) is slidably fitted into the annular groove (17).

7. The device according to claim 1, characterized in that: The outer side of the connecting ring (12) is fitted into the inner side of the probe hole.

8. The device according to claim 1, characterized in that: The outer thread of the external thread (3) is provided with an auxiliary bolt (18).

9. The device according to claim 1, characterized in that: The protective pad of the fixing bolt (4) is fixed with an anti-corrosion ring (19) on the side near the probe hole.

10. The device according to claim 1, characterized in that: The connecting ring (12) has a chamfer on the side away from the fixing bolt (4).

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