Fixing structure of mine concrete sealing wall formwork and fixing method thereof

Abstract

This invention relates to the field of fixing technology in underground mine construction, specifically to a fixing structure and method for a mine concrete sealed wall formwork. The fixing structure includes a formwork assembly, diagonal supports, and tie rods. The formwork assembly is configured to enclose a pouring space with a brick wall. The first end of the tie rod is connected to the upper half of the formwork assembly, and the second end extends towards the pouring space and is inclined downwards. After the concrete solidifies in the pouring space, a concrete sealed wall is formed. The tie rod is cast into the concrete sealed wall to connect the formwork assembly and the concrete sealed wall. The diagonal supports are located on the side of the formwork assembly facing away from the pouring space, and the position of the diagonal supports supporting the formwork assembly is lower than the position of the first end of the tie rod. The diagonal supports support the lower part of the formwork assembly, and the tie rods effectively resist the lateral pressure generated on the upper part of the formwork assembly during the pouring and solidification process, making the overall support system of the formwork assembly more reasonable and achieving reliable support for the formwork assembly.

Description

Technical Field

[0001] This invention relates to the field of fixing technology in underground mine construction, specifically to a fixing structure and method for a mine concrete sealed wall formwork. Background Technology

[0002] In recent years, with the technological advancements in coal mining equipment, the height of fully mechanized coal mining machines and hydraulic supports has approached 10 meters. Fully mechanized longwall faces with extra-thick coal seams of 10 meters commonly employ a single-pass full-thickness longwall mining process. During and after the longwall mining process, many roadways... Figure 2 The goaf 1 shown is connected. In order to block the air leakage of goaf 1, suppress the spontaneous combustion of coal and prevent water from flowing into the roadway, it is necessary to construct a sealed wall with pressure resistance, air leakage prevention and waterproofing functions in a timely manner.

[0003] Currently, the following methods are commonly used: Figure 1 The concrete sealed wall 13 shown is restricted from operation on one side of the goaf area 1, so it can only be constructed on one side. Typically, a brick wall 4 is first built on the side closest to the goaf area 1, and then formwork components are installed. The formwork components and the brick wall 4 form a pouring space, where concrete is poured. After complete solidification, the concrete sealed wall 13 is formed. To prevent the formwork components from tipping over, several diagonal supports 8 are installed on the outside of the formwork components to support them. Since the tunnel height can reach approximately 4.5m, the length of the diagonal supports 8 supporting the upper part of the formwork components is generally over 5m. The long length of the diagonal supports 8 leads to a sharp increase in deflection, making them prone to bending deformation and instability under pressure. To ensure the rigidity and stability of the diagonal supports 8, the diameter of the diagonal supports 8 needs to be increased, or connecting rods need to be added between the diagonal supports 8. This would significantly increase the amount of construction work and the weight of the formwork components, failing to meet the weight standards for working at heights. Meanwhile, the angle between the inclined support member 8 and the horizontal direction is too large. When the inclined support member 8 is subjected to horizontal thrust, according to the vector calculation of force, the actual force on the inclined support member 8 is much greater than the horizontal thrust, making it difficult to guarantee the reliability of the support for the template assembly. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a fixing structure for mine concrete sealed wall formwork, solving the problem of low reliability in existing technologies that use inclined support members to support concrete sealed walls. Furthermore, this invention aims to provide a fixing method for the fixing structure of mine concrete sealed wall formwork, solving the problem of low reliability in existing technologies that use inclined support members to support concrete sealed walls.

[0005] The present invention provides a fixing structure for a mine concrete sealed wall formwork, comprising a formwork assembly, an inclined support member, and a tie member. The formwork assembly is configured to form a pouring space for pouring concrete with a brick wall. The first end of the tie member is connected to the upper half of the formwork assembly, and the second end extends toward the pouring space and is inclined downward. After the concrete solidifies in the pouring space, it forms a concrete sealed wall. The tie member is cast in the concrete sealed wall to connect the formwork assembly and the concrete sealed wall. The inclined support member is disposed on the side of the formwork assembly away from the pouring space, and the position of the inclined support member supporting the formwork assembly is lower than the position of the first end of the tie member.

[0006] Furthermore, the tie rod includes a tie rod body and an anchor head, the first end of the tie rod body is used to connect with the template assembly, and the anchor head is disposed at the second end of the tie rod body.

[0007] Furthermore, the angle between the extension direction of the main body of the tie rod and the vertical direction is not less than 60 degrees.

[0008] Furthermore, the fixing structure of the mine concrete sealed wall formwork also includes a connecting crossbar, the tie rods are arranged in groups, the tie rod bodies of multiple tie rods in the same group are arranged in parallel, the second ends of multiple tie rod bodies are on the same horizontal straight line, and the anchor heads of multiple tie rods in the same group are connected to the same connecting crossbar.

[0009] Furthermore, one end of the connecting crossbar near the template assembly abuts against the template assembly.

[0010] Furthermore, the template assembly includes a template body and a reinforcing beam assembly. The reinforcing beam assembly includes vertical beams and horizontal beams. The vertical beams are spaced apart on the side of the template body opposite to the pouring space, and the horizontal beams are spaced apart on the side of the vertical beams opposite to the template body.

[0011] Furthermore, the main body of the tie rod is a tie rod, and the first end of the tie rod extends out of the template body and is connected to the crossbeam.

[0012] Furthermore, the main body of the tie rod is a tie piece, and the template body is provided with ribs, with the first end of the tie piece connected to the ribs.

[0013] Another aspect of the present invention provides a fixing method for a fixing structure of a mine concrete sealed wall formwork, which is applied to the fixing structure of the above-mentioned mine concrete sealed wall formwork. The fixing method includes the following steps: setting the formwork assembly on the side of the brick wall away from the goaf, so as to form a pouring space for pouring concrete with the brick wall. The first end of the tie rod is connected to the template assembly, and the second end of the tie rod extends toward the pouring space and is arranged inclined downwards. The inclined support is set on the side of the template assembly away from the pouring space, and the position of the inclined support supporting the template assembly is lower than the position of the first end of the tie rod. Concrete is poured into the pouring space, and after the concrete solidifies, a sealed concrete wall is formed, in which the tie rod is cast.

[0014] Furthermore, when pouring concrete into the pouring space, the pouring is carried out in two stages. The pouring is stopped when the concrete has submerged the anchor head of the tie member to complete the first pouring. The second pouring is carried out after a preset time has elapsed since the first pouring was completed.

[0015] The core concept of this invention is as follows: A tie rod is installed in the upper half of the formwork assembly to connect the formwork assembly and the concrete sealed wall. The first end of the tie rod is connected to the upper half of the formwork assembly, and the second end extends towards the pouring space and is inclined downwards. After the concrete solidifies in the pouring space, it forms the concrete sealed wall. The tie rod is cast into the concrete sealed wall, thereby supporting and positioning the upper half of the formwork assembly. Simultaneously, a diagonal support is used on the formwork assembly at a position corresponding to the lower side of the first end of the tie rod to provide upward support. In this way, the diagonal support ensures the positioning and support of the lower part of the formwork assembly, and the tie rod effectively resists the lateral pressure generated on the upper part of the formwork assembly during the pouring and solidification process, making the overall support system of the formwork assembly more rational and achieving reliable support for the formwork assembly. Attached Figure Description

[0016] Figure 1 These are structural diagrams of existing brick walls and sealed concrete walls; Figure 2 This is a schematic diagram of a structure in the prior art that uses inclined support members to support the template assembly; Figure 3 This is a schematic diagram of the fixing structure of a mine concrete sealed wall formwork according to the present invention.

[0017] In the diagram, 1. Goaf; 2. Roadway floor; 3. Roadway roof; 4. Brick wall; 5. Formwork body; 6. Vertical beam; 7. Horizontal beam; 8. Diagonal support; 9. Tie rod; 10. Concrete grout; 11. Injection port; 12. Connecting crossbar; 13. Concrete sealed wall. Detailed Implementation

[0018] The core concept of this invention is as follows: A tie rod is installed in the upper half of the formwork assembly to connect the formwork assembly and the concrete sealed wall. The first end of the tie rod is connected to the upper half of the formwork assembly, and the second end extends towards the pouring space and is inclined downwards. After the concrete solidifies in the pouring space, it forms the concrete sealed wall. The tie rod is cast into the concrete sealed wall, thereby supporting and positioning the upper half of the formwork assembly. Simultaneously, a diagonal support is used on the formwork assembly at a position corresponding to the lower side of the first end of the tie rod to provide upward support. In this way, the diagonal support ensures the positioning and support of the lower part of the formwork assembly, and the tie rod effectively resists the lateral pressure generated on the upper part of the formwork assembly during the pouring and solidification process, making the overall support system of the formwork assembly more rational and achieving reliable support for the formwork assembly.

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] The fixing structure of the mine concrete sealed wall formwork of the present invention includes as follows: Figure 3The template assembly, inclined support 8, and tie rod 9 shown are configured to enclose a concrete pouring space with the brick wall 4. The tunnel is 5.6m wide and 4.4m high. A tunnel floor slab 2 is located at the bottom of the tunnel, and a tunnel roof slab 3 is located at the top. The brick wall 4 is built on the tunnel floor slab 2 and extends upwards to the tunnel roof slab 3 to temporarily seal the goaf 1. The brick wall 4 is at least 500mm thick, and its perimeter is grooved. The template assembly is located on the side of the brick wall 4 facing away from the goaf 1, on the tunnel floor slab 2, and extends upwards to the tunnel roof slab 3 to seal the entire cross-section of the tunnel. A grouting port 11 is located on the tunnel roof slab 3 at a position corresponding to the pouring space, allowing the pouring pipe to extend into the pouring space for pouring. There are generally at least two grouting ports 11, spaced at least 3m apart, to ensure complete pouring. The first end of the tie rod 9 is connected to the upper half of the template assembly, and the second end extends towards the pouring space and is arranged obliquely downwards. After the concrete solidifies in the pouring space, it forms a concrete sealed wall 13 with a thickness of 1.0m. The tie rod 9 is cast into the concrete sealed wall 13 to connect the template assembly and the concrete sealed wall 13. By using the tie rod 9 cast into the concrete sealed wall 13 to fix the upper template, the problem of fixing the upper part of the template assembly of the ultra-high concrete sealed wall 13 is solved. At the same time, the pouring speed of ultra-high, ultra-large, and ultra-thick concrete is slow, especially the transportation of concrete in coal mines is difficult and slow. The pouring of the concrete sealed wall 13 generally takes 2 to 3 days. This invention adopts the method of pre-embedding the tie rod 9 into the concrete sealed wall 13, which can make full use of the existing construction cycle and process flow and does not affect the overall construction progress. The inclined support 8 is an adjustable steel support made of steel pipe. The inclined support 8 is located on the side of the formwork assembly facing away from the pouring space, and the position of the inclined support 8 supporting the formwork assembly is lower than the first end of the tie rod 9. This avoids the problems of easy bending and instability caused by an excessively long upper inclined support 8, making the overall support more reliable. It also solves the problem of the original upper inclined support 8 having an excessively large angle with the horizontal, amplifying the horizontal thrust, making the overall force distribution more reasonable. Of course, the inclined support 8 will not be too long, nor is it necessary to increase its diameter, achieving a lightweight design that meets the weight requirements of high-altitude operations. In this invention, the lower inclined support ensures the positioning and support of the lower part of the formwork assembly, and the tie rod effectively resists the lateral pressure generated on the formwork assembly during concrete pouring and solidification, making the overall support system more reasonable and achieving reliable support for the formwork assembly.

[0022] The tie member 9 includes a tie body and an anchor head. The first end of the tie body is used to connect to the template assembly, and the anchor head is located at the second end of the tie body. The tie body with the anchor head significantly improves the pull-out bearing capacity of the tie member 9. When the tie member 9 is subjected to tensile force, the anchor head will be locked inside the concrete sealed wall 13, preventing the tie member 9 from being pulled out of the concrete sealed wall 13 and ensuring the anchorage strength of the tie member 9.

[0023] The angle between the main body of the tie rod and the vertical direction is not less than 60 degrees. By limiting the angle between the main body of the tie rod and the vertical direction, the tie rod generates a component force that presses into the interior of the concrete sealed wall 13 when under stress, making better use of the high compressive strength of concrete and optimizing the stress mechanism. At the same time, the large-angle inclined tie rod provides stronger vertical restraint during concrete pouring, effectively resisting the lateral pressure generated on the formwork assembly by the concrete during pouring and solidification, and preventing the formwork assembly from floating or deforming.

[0024] The fixing structure of the mine concrete sealed wall formwork also includes a connecting horizontal bar 12. The tie rods 9 are arranged in groups, with the first ends of the tie rod bodies of multiple tie rods 9 in the same group connected to the same vertical direction of the formwork assembly. The tie rod bodies in the same group are arranged in parallel, and the second ends of the multiple tie rod bodies are on the same horizontal line. Thus, the anchor heads of multiple tie rods 9 in the same group are on the same horizontal line. The anchor heads of multiple tie rods 9 in the same group are connected to the same connecting horizontal bar 12. The connecting horizontal bar 12 provides a common installation reference for multiple tie rods 9 in the same group, which greatly simplifies the installation process and ensures construction quality.

[0025] The end of the connecting crossbar 12 closest to the template assembly abuts against the template assembly. When the connecting crossbar 12 abuts against the template assembly, the anchor head will automatically fall into the designated position. At this time, the connecting crossbar 12 can constrain the lower end of each tie rod 9 in the horizontal direction to act as an anchor point. This effectively limits the independent horizontal displacement or swaying that may occur in each tie rod 9 under force, and enhances the stability of the tie rod 9.

[0026] The template assembly includes a template body 5 and a reinforcing beam assembly. The reinforcing beam assembly includes vertical beams 6 and horizontal beams 7. The vertical beams 6 are generally square steel pipes, and the horizontal beams 7 are double-section square steel pipes. The vertical beams 6 are arranged in groups and spaced apart on the side of the template body 5 opposite to the pouring space. The horizontal beams 7 are also arranged in groups and spaced apart on the side of the vertical beams 6 opposite to the template body 5. That is, the horizontal beams 7 and vertical beams 6 together form a frame structure reinforcing beam assembly, which significantly enhances the rigidity and bending resistance of the template assembly, effectively resists the lateral pressure during concrete pouring, prevents the template assembly from bulging or excessive deformation, significantly improves the overall performance of the template assembly, extends the service life of the template assembly, and has good economic benefits. The first end of the inclined support 8 is connected to the horizontal beam 7 of the template assembly, and the second end is connected to the tunnel floor slab 2. Of course, in other embodiments, the first end of the inclined support 8 can also be connected to the vertical beam 6 of the template assembly, as long as the connection is reliable.

[0027] The tie rod is a main body of the formwork body 5, and a round hole is provided on the formwork body 5. The first end of the tie rod extends out of the round hole of the formwork body 5 and is connected to the crossbeam 7. The tie rod is usually made of threaded steel bar or round steel. The tie rod has a large cross-sectional area and tensile strength, which ensures reliable support for the formwork body 5.

[0028] Regarding the main body of the tie rod, the present invention also provides other embodiments. In another embodiment, the main body of the tie rod is a tie plate. The template body 5 itself is provided with ribs. The first end of the tie plate is connected to the ribs. The tie plate is thin and remains in the concrete sealed wall 13 after pouring, hardly reducing the effective thickness of the concrete sealed wall 13.

[0029] Regarding the tie rod component, the present invention also provides other embodiments. In one embodiment, the tie rod component only includes the tie rod body, that is, it does not have an anchor head. In another embodiment, the tie rod component includes the tie rod body, and the tie rod body is provided with barbs or protrusions to ensure the anchoring strength of the tie rod component.

[0030] Regarding the arrangement of the tie rod body, the present invention also provides other embodiments. In another embodiment, under the premise of ensuring the anchoring strength of the tie rod body, the angle between the tie rod body and the vertical direction can also be less than 60 degrees.

[0031] Another aspect of the present invention provides a fixing method for a fixing structure of a mine concrete sealed wall formwork. The fixing method is applied to a fixing structure of a mine concrete sealed wall formwork as described above. The fixing method includes the following steps: setting the formwork assembly on the side of the brick wall 4 away from the goaf 1, so as to form a pouring space for pouring concrete with the brick wall 4. The first end of the tie rod 9 is connected to the template assembly, and the second end of the tie rod 9 extends toward the pouring space and is arranged inclined downwards. The inclined support 8 is placed on the side of the template assembly away from the pouring space, and the inclined support 9 supports the template assembly at a position lower than the first end of the tie rod 9.

[0032] Concrete is poured into the pouring space, and after the concrete solidifies, a concrete sealed wall 13 is formed, in which the tie rod 9 is cast into the concrete sealed wall 13.

[0033] When pouring concrete into the pouring space, it is done in two stages. Pouring stops when the concrete covers the anchor head of the tie rod 9, completing the first pour. At this point, the depth of the concrete covering the anchor head of the tie rod 9 does not exceed 200mm. After a preset time has elapsed since the first pour, the concrete has solidified and gained sufficient strength to firmly anchor the anchor head. Then, the second pour is performed, filling the tunnel roof 3. In this embodiment, the time between the completion of the second pour and the first pour should not be less than 24 hours. Of course, in other embodiments, the time between the completion of the second pour and the first pour can be less than or equal to 24 hours, but it is still necessary to ensure that the concrete poured in the first pour solidifies and gains sufficient strength within that time.

[0034] Since the fixing structure of the mine concrete sealed wall formwork obtained by applying this fixing method is the same as the fixing structure of the mine concrete sealed wall formwork mentioned above, it will not be described again here.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. The scope of protection of this application should be determined by the scope of the claims. Although this application has disclosed the preferred embodiment above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall fall within the scope of the technical solution of this application.

Claims

1. A fixing structure for a mine concrete sealed wall formwork, characterized in that: The formwork assembly includes a template assembly, a diagonal support (8), and a tie rod (9). The template assembly is configured to form a pouring space for pouring concrete with the brick wall (4). The first end of the tie rod (9) is connected to the upper half of the template assembly, and the second end extends toward the pouring space and is arranged obliquely downward. After the concrete solidifies in the pouring space, it forms a concrete sealed wall (13). The tie rod (9) is poured into the concrete sealed wall (13) to connect the template assembly and the concrete sealed wall (13). The diagonal support (8) is located on the side of the template assembly away from the pouring space, and the position of the diagonal support (9) supporting the template assembly is lower than the position of the first end of the tie rod (9).

2. The structure for fixing the mine concrete sealing wall form according to claim 1, wherein: The tie rod (9) includes a tie rod body and an anchor head. The first end of the tie rod body is used to connect with the template assembly, and the anchor head is disposed at the second end of the tie rod body.

3. The fixing structure for the mine concrete sealed wall formwork according to claim 2, characterized in that: The angle between the extension direction of the main body of the tie rod and the vertical direction is not less than 60 degrees.

4. The fixing structure for the mine concrete sealed wall formwork according to claim 2 or 3, characterized in that: It also includes a connecting crossbar (12), the tie rods (9) are arranged in groups, the tie rod bodies of multiple tie rods (9) in the same group are arranged in parallel, the second ends of multiple tie rod bodies are on the same horizontal line, and the anchor heads of multiple tie rods (9) in the same group are connected to the same connecting crossbar (12).

5. The fixing structure for the mine concrete sealed wall formwork according to claim 4, characterized in that: The end of the connecting crossbar (12) near the template assembly abuts against the template assembly.

6. The fixing structure for mine concrete sealed wall formwork according to any one of claims 1-3, characterized in that: The template assembly includes a template body (5) and a reinforcing beam assembly. The reinforcing beam assembly includes vertical beams (6) and horizontal beams (7). The vertical beams (6) are spaced apart on the side of the template body (5) away from the pouring space, and the horizontal beams (7) are spaced apart on the side of the vertical beams (6) away from the template body (5).

7. The fixing structure for the mine concrete sealed wall formwork according to claim 6, characterized in that: The main body of the tie rod is a tie rod, and the first end of the tie rod extends out of the template body (5) and is connected to the crossbeam (7).

8. The fixing structure for the mine concrete sealed wall formwork according to claim 6, characterized in that: The main body of the tie rod is a tie plate, and the template body (5) is provided with ribs. The first end of the tie plate is connected to the ribs.

9. A method for fixing a fixing structure for a mine concrete sealed wall formwork, applied to the fixing structure for a mine concrete sealed wall formwork as described in any one of claims 1-8, characterized in that: Includes the following steps: The template assembly is set on the side of the brick wall (4) away from the goaf (1) to form a pouring space for pouring concrete with the brick wall (4); The first end of the tie rod (9) is connected to the template assembly, and the second end of the tie rod (9) extends toward the pouring space and is arranged inclined downward. The inclined support (8) is set on the side of the template assembly away from the pouring space, and the position of the inclined support (9) supporting the template assembly is lower than the position of the first end of the tie rod (9). Concrete is poured into the pouring space, and after the concrete solidifies, a concrete sealed wall (13) is formed, in which the tie rod (9) is poured.

10. The fixing method for the fixing structure of the mine concrete sealed wall formwork according to claim 9, characterized in that: When pouring concrete into the pouring space, the pouring is carried out in two stages. The pouring is stopped when the concrete has submerged the anchor head of the tie member (9) to achieve the first pouring. The second pouring is carried out after the first pouring has been completed for a preset time.

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