Corrugated steel and arch connecting conversion structure and construction method thereof

Abstract

The application discloses a corrugated steel and arch connecting conversion structure and a construction method thereof. The connecting conversion structure comprises a connecting arch and an adjusting assembly for mounting a positioning flange plate of the corrugated steel. The adjusting assembly comprises a spherical hinge connecting rod. One end of the spherical hinge connecting rod is hingedly connected with a screw rod I through a spherical hinge piece. The screw rod I can be matched with a limiting nut. The adjusting assembly can be connected with the arch through the matching of the screw rod I and the limiting nut. The other end of the spherical hinge connecting rod is hingedly connected with a connecting rod through another spherical hinge piece. The connecting rod is provided with a positioning plate at the end away from the spherical hinge piece. The positioning plate can be connected with the positioning flange plate through a fastener. The connecting conversion structure can solve the problem of inconsistent cross section mileage after the initial supporting structure is assembled due to the deformation of the arch supporting structure, the assembly error and other reasons, so as to guarantee the connecting strength of the arch and the corrugated steel and the assembly posture of the corrugated steel structure.

Description

Technical Field

[0001] This invention relates to the field of tunnel and underground engineering technology, specifically to a corrugated steel and arch frame connection and conversion structure and its construction method. Background Technology

[0002] Currently, the main construction method for initial support of mined subway tunnels, mountain tunnels, and construction cross passages is "steel arch frame / steel grid + shotcrete structure". During construction, problems such as the quality of shotcrete construction can cause deformation and damage to the support structure, leading to safety accidents. Therefore, in order to improve the strength of the initial support structure, corrugated steel plates have begun to be used as the initial support structure for tunnels. However, corrugated steel has high requirements for assembly accuracy and posture. It is easy to cause problems such as inconsistent cross-sectional mileage after the initial support structure is assembled due to arch frame deformation, assembly errors, etc., which cannot guarantee the connection strength between the arch frame and the corrugated steel, or the assembly posture of the corrugated steel. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a corrugated steel and arch frame connection conversion structure and its construction method. This connection conversion structure, through adjusting screws, nuts, and ball joints, achieves the connection between the arch frame and the positioning flange plate, ensuring that the cross-section of the positioning flange plate is at the same mileage and that the assembly outline is consistent with the design cross-section. This connection conversion structure solves problems such as inconsistent cross-sectional mileage after initial support structure assembly caused by arch frame support structure deformation and assembly errors, thereby ensuring the connection strength between the arch frame and the corrugated steel and the assembly posture of the corrugated steel structure.

[0004] To achieve the above objectives, the specific solution adopted by the present invention is as follows: On one hand, the present invention provides a corrugated steel and arch frame connection conversion structure, wherein the corrugated steel is installed on a positioning flange plate, and the connection conversion structure includes an adjustment assembly for connecting the arch frame and the positioning flange plate; The adjusting assembly includes a ball joint connecting rod with ball joints at both ends. One end of the ball joint connecting rod is hinged to a screw I via a ball joint. The screw I can cooperate with a limit nut, and the adjusting assembly can be connected to the arch frame through the cooperation of the screw I and the limit nut. The other end of the ball joint connecting rod is hinged to a connecting rod via another ball joint. The end of the connecting rod away from the ball joint is provided with a positioning plate, and the positioning plate can be connected to the positioning flange plate by fasteners.

[0005] Furthermore, the connection conversion structure also includes a first locking component and a second locking component for locking the position of the adjustment component in place.

[0006] Furthermore, the first locking assembly includes a plate-shaped first locking member and an L-shaped second locking member. Both the first and second locking members can be fastened to both sides of the ball joint. The vertical portions of the first and second locking members are arranged parallel to each other. A screw II is connected to the first locking member, and a fastening nut is connected to the screw II. The horizontal portion of the second locking member is provided with a mounting hole that mates with the screw II. The first locking member and the second locking member can be connected by the screw II mates with the fastening nut.

[0007] Furthermore, the two locking components are respectively fastened to screw I and connecting rod.

[0008] Furthermore, both the first and second locking members have a through hole with a notch on their vertical parts, and ribs with threaded holes extend outward from both sides of the notch on the first and second locking members, and the ribs on both sides are clamped by bolts passing through them.

[0009] Furthermore, several T-shaped arc grooves are evenly distributed on the inner ball of the ball joint near the ball joint connection. The second locking assembly includes a limiting block for secondary positioning of the ball joint, a locking sleeve for pressing the limiting block, and a locking nut that cooperates with the locking sleeve to limit the limiting block when it moves to the locking position of the ball joint. The locking sleeve has an external thread in the middle that can cooperate with the locking nut. In the initial state, the limiting block is set close to the ball joint connecting rod and is limited by the locking sleeve. After the limiting block is manually moved to the locking position, the locking sleeve can press the limiting block onto the ball joint connecting rod or into the T-shaped arc groove. The locking nut can fix the limiting block in the target position, thereby locking the ball joint.

[0010] Furthermore, the locking sleeve has several guide grooves along the axial direction at both ends, and the limiting block includes an arc-shaped segment and a vertical segment perpendicularly disposed on the arc-shaped segment. The vertical segment can extend through the guide grooves on the locking sleeve to the outside of the locking sleeve.

[0011] Furthermore, the positioning plate is provided with a waist-shaped hole, and the positioning flange plate is provided with a positioning hole. The positioning plate and the positioning flange plate are connected by fasteners.

[0012] On the one hand, the present invention provides a method for constructing a corrugated steel and arch frame connection conversion structure, which mainly includes the following steps: (1) Connect one end of the connecting and conversion structure to the arch frame to form a composite component; (2) The arch frames in several components are spliced ​​together according to the design assembly sequence to obtain the assembled arch frame support structure; (3) Connect the other end of the connecting conversion structure in each assembly to the positioning flange plate. Several positioning flange plates form a ring, and there is a gap between two adjacent positioning flange plates. (4) Use a total station to measure and adjust the attitude of the positioning flange plate. Use a ball joint and screw I to make fine adjustments to the positioning flange plate in the x, y and z directions so that several positioning flange plates are located at the same mileage. (5) Lock the adjustment component through two locking components; (6) Cover the arch frame with shotcrete; (7) Connect the corrugated steel to the positioning flange plate.

[0013] Further, in step (5), after the adjustment component is adjusted, the limiting block is pushed to move along the guide groove on the locking sleeve to limit the movement of the ball joint. Then, the locking nut is rotated to press the limiting block in both the circumferential and radial directions, thereby locking the ball joint and realizing the first locking of the adjustment component. Then, the adjustment component is locked a second time through the first locking component, the second locking component, the fastening nut and the screw II.

[0014] Beneficial effects: 1) The connection conversion structure of this invention includes a screw I, a limiting nut, a ball joint connecting rod, and a positioning plate. The screw I, in conjunction with the limiting nut, connects the adjusting assembly to the arch frame; fasteners connect the positioning plate to the positioning flange plate. This connection conversion structure improves the connection strength of the structure and ensures the safety of the tunnel structure. It solves problems such as inconsistent cross-sectional mileage after initial support structure assembly caused by arch frame support structure deformation and assembly errors, thereby ensuring the connection strength between the arch frame and the corrugated steel, and the assembly posture of the corrugated steel structure. Simultaneously, this connection conversion structure can also be used for posture adjustment during the assembly process of corrugated steel or arch frame structures.

[0015] 2) The connection conversion structure of the present invention also includes two locking components. The two locking components cooperate with each other to lock the position of the adjusted component in place, so that the corrugated steel can be located at the same cross-sectional mileage during assembly. Attached Figure Description

[0016] Figure 1 This is an overall diagram of the connection and transformation structure.

[0017] Figure 2 This is a schematic diagram of the structure of the adjustment component and the second locking component.

[0018] Figure 3 This is a schematic diagram of the ball joint connecting rod and the ball joint component.

[0019] Figure 4 for Figure 3 Sectional view at point AA.

[0020] Figure 5 This is a schematic diagram of the structure of the first locking component 2.

[0021] Figure 6 This is a schematic diagram of the structure of the second locking assembly 3, the ball joint 103, and the ball joint connecting rod 104.

[0022] Figure 7 This is a partial view of the connection between the arch frame 5 and the positioning flange plate 6.

[0023] Figure 8 This is an overall diagram showing the connection between the arch frame 5 and the positioning flange plate 6.

[0024] The markings in the diagram are: 1. Adjustment component, 101. Screw I, 102. Limit nut, 103. Ball joint, 1031. T-shaped arc groove, 104. Ball joint connecting rod, 105. Positioning plate, 1051. Waist-shaped hole; 2. First locking assembly; 201. First locking element; 202. Second locking element; 203. Fastening nut; 204. Screw II; 205. Through hole; 206. Rib plate; 3. Second locking assembly, 301, locking sleeve, 3011, guide groove, 3012, external thread, 302, locking nut, 303, limit block, 3031, arc segment, 3032, vertical segment; 4. Connecting and conversion structure; 5. Arch frame; 501. Bolt holes; 6. Positioning flange plate; 7. Fasteners. Detailed Implementation

[0025] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0026] This invention provides a corrugated steel and arch frame connection conversion structure, please refer to... Figure 1 The corrugated steel is installed on the positioning flange plate 6. This connection and conversion structure mainly realizes the connection and conversion between the arch frame 5 and the positioning flange plate 6, ensuring that the corrugated steel installed on the positioning flange plate 6 is subsequently assembled at the same mileage. It can also solve the problem of difficulty in adjusting the posture of the tunnel arch frame 5 or corrugated steel due to structural deformation under the action of surrounding rock pressure. This connection and conversion structure mainly includes the adjustment component 1, please refer to... Figure 2The adjusting assembly 1 consists of a screw I 101, a limiting nut 102, a ball joint 103, a ball joint connecting rod 104, a connecting rod, and a positioning plate 105. One end of the ball joint connecting rod 104 is hinged to the screw I 101 via a ball joint 103. The adjusting assembly 1 can be connected to the arch frame 5 by the screw I 101 cooperating with the limiting nut 102. The other end of the ball joint connecting rod 104 is hinged to the connecting rod via another ball joint 103. The end of the connecting rod away from the ball joint 103 is provided with a positioning plate 105. The positioning plate 105 can be connected to the positioning flange plate 6 by fasteners 7.

[0027] The connecting screw I 101 and the limiting nut 102 in the connecting conversion structure connect the arch frame 5. By adjusting the position of the two limiting nuts 102 on the screw I 101, the entire support structure can be displaced within 10cm along the longitudinal direction of the tunnel, so that the cross section of the adjusted support structure is at the same mileage.

[0028] The ball joint connecting rod 104, in conjunction with the ball joint component 3, can adjust the assembly posture of the positioning flange plate 6 within the tunnel cross section and make small-amplitude changes in the longitudinal direction of the tunnel, thereby achieving posture adjustment of the positioning flange plate in the x, y, and z dimensions.

[0029] The positioning plate 105 is fixedly connected to the positioning flange plate 6 by fasteners 7, which improves the connection strength and ensures the stability of the positioning flange plate 6, thereby providing a guarantee for the next step of precise assembly of the corrugated steel structure.

[0030] The connection conversion structure connects the arch frame 5 and the positioning flange plate 6 through the screw I 101, the limit nut 102, the fastener 7 and the positioning plate 105, which improves the connection speed and increases the connection strength compared with the traditional welding method.

[0031] In a preferred embodiment of the present invention, the connection conversion structure further includes a first locking component 2 and a second locking component 3 for locking the adjusted component 1 in place. The two locking components 2 and 3 cooperate with each other to firmly lock the adjusted component 1 in the target position. It should be explained that the present invention designs two locking components instead of one because the purpose of the first locking component 2 is to limit the movement of the ball joint. Considering the gravity of the structure, the locking effect of the first locking component 2 may not be sufficient to achieve a complete lock. However, the second locking component 3 can ensure a tight lock.

[0032] Please refer to the following: Figure 5The first locking assembly 2 includes a plate-shaped first locking member 201 and an L-shaped second locking member 202. Both the first locking member 201 and the second locking member 202 can be fastened to both sides of the ball joint 103. The vertical portions of the first locking member 201 and the second locking member 202 are arranged parallel to each other. A screw II 14 is connected to the end of the first locking member 201 away from the adjustment assembly. A fastening nut 203 is connected to the screw II 14. The horizontal portion of the second locking member 202 is provided with a mounting hole that cooperates with the screw II 204. The first locking member 201 and the second locking member 202 can be connected by the cooperation of the screw II 204 and the fastening nut 203. Both the first locking member 201 and the second locking member 202 have a through hole 205 with a notch on their vertical portions. Fasteners 201 and 202 can be installed onto the adjusting assembly through this notch. Ribs 206 with threaded holes extend outward from both sides of the notch on the first locking member 201 and the second locking member 202. The ribs 206 on both sides are clamped together by bolts passing through them. In other words, the first locking assembly 2 is fastened to the adjusting assembly 1 by installing bolts on the ribs 206. Finally, the second locking member 202 is locked in place by adjusting the fastening nut 203. Thus, the adjusting assembly 1 is fixed by the first locking assembly 2.

[0033] In detail, the two locking elements 201 and 202 are respectively fastened to the screw I 101 and the connecting rod. Please refer to [reference needed]. Figure 4 The first locking member 201 is fastened to one end of the screw I 101 near the ball joint 103, and the second fastener 202 is fastened to the connecting rod.

[0034] Please refer to Figure 6 The second locking assembly 3 includes a limiting block 303 for secondary positioning of the ball joint 103, a locking sleeve 301 for pressing the limiting block 303, and a locking nut 302 that cooperates with the locking sleeve 301 to limit the limiting block 302 that has moved to the locking position of the ball joint. The locking sleeve 301 has an external thread 3012 in the middle that can cooperate with the locking nut 302. In the initial state, the limiting block 303 is set close to the ball joint connecting rod 104 and is limited by the locking sleeve 301. After the limiting block 303 is manually moved to the locking position, the locking sleeve 301 can press the limiting block 303 onto the ball joint connecting rod 104 or into the T-shaped arc groove 1031. The locking nut 302 can fix the limiting block 303 in the target position, thereby locking the ball joint 103.

[0035] Please refer to Figure 3-4The locking sleeve 303 has guide grooves 3011 at both ends along the axial direction, the number of which matches the number of T-shaped arc grooves 1031. The limiting block 303 includes an arc-shaped segment 3031 and a vertical segment 3032 perpendicularly disposed on the arc-shaped segment 3031. The vertical segment 3032 can extend through the guide grooves 3011 on the locking sleeve 301 to the outside of the locking sleeve 301. The guide grooves 3011 are used to limit the movement path of the limiting block 303 on the one hand, and to facilitate the extension of the vertical segment 3032 to the outside of the locking sleeve 303 on the other hand, so that the operator can manually push the limiting block 303 to the target position.

[0036] On the other hand, please refer to Figure 7-8 This invention provides a method for constructing a corrugated steel and arch frame connection conversion structure, comprising the following steps: After tunnel excavation, before assembling the arch frame 5, the screw I 101 and the limiting nut 102 connecting the conversion structure 4 are installed on the arch frame 5 through the bolt holes 501 on the arch frame 5. Then, the arch frame 5 is assembled to obtain the assembled arch frame support structure. After the arch frame 5 is installed, the corrugated steel positioning flange plate 6 is installed. The positioning plate 105 connecting the conversion structure 4 is connected to the positioning flange plate 6 by fasteners 7. Several positioning flange plates 6 form a ring, with gaps between adjacent positioning flange plates to facilitate adjustment of the cross-sectional mileage of each positioning flange plate 6. The attitude is measured using a total station. For points where mileage adjustment is required, the positioning flange plate 6 is finely adjusted in the x, y, and z directions using ball joints 103 and screw I 101. When the positioning flange plates 6 are at the same mileage, the adjustment component is fixed by two locking components. Then, the arch frame 5 is covered with shotcrete. Thus, the conversion construction between the arch frame and the corrugated steel is completed. The next step is to assemble the corrugated steel.

[0037] Specifically, the method for fixing the adjusting component 1 using two locking components 2 and 3 is as follows: After the adjusting component 1 is adjusted, the limiting block 303 is pushed to move along the guide groove 3011 on the locking sleeve 301 to limit the movement of the ball joint 103. Then, the locking nut 302 is rotated to press the limiting block 303 in both the circumferential and radial directions, thereby locking the ball joint 103 and achieving the first locking of the adjusting component 1. Then, the adjusting component 1 is locked a second time through the first locking component 201, the second locking component 202, the fastening nut 203, and the screw II 204.

[0038] The technical solution of the present invention will be described in detail below with reference to specific embodiments. Example 1 (Two-stage construction) A method for constructing a corrugated steel and arch frame connection transfer structure includes the following steps: After the tunnel upper bench is excavated, before assembling the upper bench arch frame 5, the screw I 101 and the limit nut 102 connecting the conversion structure 4 are installed on the arch frame 5 through the bolt holes 501 on the arch frame 5. Then, the arch frame 5 is assembled. After the arch frame 5 is installed, the corrugated steel positioning flange plate 6 is installed. The flange plate 4 connecting the conversion structure is connected to the positioning flange plate 6 by fasteners 7 (bolts). After the positioning flange plate 6 is installed, the attitude is measured using a total station. For points where the mileage needs to be adjusted, the positioning flange plate 6 is finely adjusted in the x, y, and z directions using ball joint 103 and screw I 101. When the positioning flange plate 6 is at the same mileage, the adjustment component 1 is fixed by two locking components 2 and 3. Then, the arch frame 5 is covered with shotcrete to complete the installation of the upper bench connecting conversion structure.

[0039] When the tunnel lower step is excavated to the installation position of the upper step connecting conversion structure, before assembling the lower step arch frame 5, the screw I 101 and the limit nut 102 of the connecting conversion structure 4 are installed on the arch frame 5 through the bolt holes 501 on the arch frame 5. Then, the arch frame 5 is assembled. After the arch frame 5 is installed, the corrugated steel positioning flange plate 6 is installed. The positioning plate 105 of the connecting conversion structure 4 is connected to the positioning flange plate 6 by fasteners 7 (bolts). After the positioning flange plate 6 is installed, the attitude is measured using a total station. For points where the mileage needs to be adjusted, the positioning flange plate 6 is finely adjusted in the x, y, and z directions by ball joint 103 and screw I 101. When the positioning flange plate 6 is at the same mileage, the adjustment component 1 is fixed by two locking components 2 and 3. Then, the arch frame 5 is covered with shotcrete to complete the installation of the lower step connecting conversion structure.

[0040] Example 2 (Full-section construction) After tunnel excavation, before assembling the arch frame 5, the screw I 101 and the limiting nut 102 connecting the conversion structure 4 are installed on the arch frame 5 through the bolt holes 501 on the arch frame 5. Then, the arch frame 5 is assembled. After the arch frame 5 is installed, the corrugated steel positioning flange plate 6 is installed. The positioning plate 105 connecting the conversion structure 4 is connected to the positioning flange plate 6 by fasteners 7 (bolts). After the positioning flange plate 6 is installed, the attitude is measured using a total station. For points where the mileage needs to be adjusted, the positioning flange plate 6 is finely adjusted in the x, y, and z directions using ball joint 103 and screw I 101. When the positioning flange plate 6 is at the same mileage, the adjusting component 1 is fixed by two locking components 2 and 3. Then, the arch frame 5 is covered with shotcrete. Thus, the conversion construction between the arch frame 5 and the corrugated steel is completed. The next step is to assemble the corrugated steel.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention in any way. All equivalent transformations or modifications made in accordance with the essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A corrugated steel and arch frame connection conversion structure, wherein the corrugated steel is mounted on a positioning flange plate, characterized in that, The connection conversion structure includes an adjustment assembly for connecting the arch frame and the positioning flange plate; The adjusting assembly includes a ball joint connecting rod with ball joints at both ends. One end of the ball joint connecting rod is hinged to a screw I via a ball joint. The screw I can cooperate with a limit nut, and the adjusting assembly can be connected to the arch frame through the cooperation of the screw I and the limit nut. The other end of the ball joint connecting rod is hinged to a connecting rod via another ball joint. The end of the connecting rod away from the ball joint is provided with a positioning plate, and the positioning plate can be connected to a positioning flange plate by fasteners. The connection conversion structure further includes a first locking component and a second locking component for locking the adjusted component in place; the first locking component includes a plate-shaped first locking member and an L-shaped second locking member, both of which can be fastened to both sides of the ball joint. The vertical portions of the first locking member and the second locking member are arranged parallel to each other. A screw II is connected to the first locking member, and a fastening nut is connected to the screw II. The horizontal portion of the second locking member is provided with a mounting hole that mates with the screw II. The first locking member and the second locking member can be connected by the screw II mates with the fastening nut.

2. The corrugated steel and arch frame connection and conversion structure according to claim 1, characterized in that, The two locking components are respectively fastened to screw I and connecting rod.

3. The corrugated steel and arch frame connection and conversion structure according to claim 1, characterized in that, The first locking member and the second locking member each have a through hole with a notch on their vertical parts. The first locking member and the second locking member each have a rib plate with a threaded hole extending outward from both sides of the notch. The rib plates on both sides are clamped by bolts passing through them.

4. The corrugated steel and arch frame connection and conversion structure according to claim 1, characterized in that, The inner ball of the ball joint has several T-shaped arc grooves evenly distributed near the ball joint connection. The second locking assembly includes a limiting block for secondary positioning of the ball joint, a locking sleeve for pressing the limiting block, and a locking nut that cooperates with the locking sleeve to limit the limiting block when it moves to the locking position of the ball joint. The locking sleeve has an external thread in the middle that can cooperate with the locking nut. In the initial state, the limiting block is set close to the ball joint connecting rod and is limited by the locking sleeve. After the limiting block is manually moved to the locking position, the locking sleeve can press the limiting block onto the ball joint connecting rod or into the T-shaped arc groove. The locking nut can fix the limiting block in the target position, thereby locking the ball joint.

5. The corrugated steel and arch frame connection and conversion structure according to claim 4, characterized in that, The locking sleeve has several guide grooves along the axial direction at both ends. The limiting block includes an arc-shaped segment and a vertical segment perpendicular to the arc-shaped segment. The vertical segment can pass through the guide grooves on the locking sleeve and extend to the outside of the locking sleeve.

6. The corrugated steel and arch frame connection and conversion structure according to claim 1, characterized in that, The positioning plate is provided with a waist-shaped hole, and the positioning flange plate is provided with a positioning hole. The positioning plate and the positioning flange plate are connected by fasteners.

7. A method for constructing the corrugated steel and arch frame connection conversion structure as described in claim 5, characterized in that, The main steps are as follows: (1) Connect one end of the connecting conversion structure to the arch frame to form a combination; (2) Assemble the arch frames in the combination according to the design assembly sequence to obtain the assembled arch frame support structure; (3) Connect the other end of the connecting conversion structure in each combination to the positioning flange plate, and form a ring with a gap between two adjacent positioning flange plates; (4) Use a total station to measure and adjust the posture of the positioning flange plate, and use the ball joint connecting rod and screw I to make the positioning flange plate fine-tuned in the x, y, and z directions so that the positioning flange plates are located at the same mileage; (5) Lock the adjustment component through two locking components; (6) Cover the arch frame with sprayed concrete; (7) Connect the corrugated steel to the positioning flange plate.

8. The construction method of the corrugated steel and arch frame connection conversion structure according to claim 7, characterized in that, In step (5), after the adjustment component is adjusted, the limiting block is pushed to move along the guide groove on the locking sleeve to limit the movement of the ball joint. Then, the locking nut is rotated to press the limiting block in both the circumferential and radial directions, thereby locking the ball joint and realizing the first locking of the adjustment component. Then, the adjustment component is locked a second time through the first locking component, the second locking component, the fastening nut and the screw II.

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