A steel arch lifting device for high-speed railway tunnel construction

Abstract

The present invention provides a steel arch lifting device for high-speed railway tunnel construction, including a trolley, a working platform is arranged on the top of the trolley, two positioning pieces are symmetrically arranged on the left and right ends of the working platform, the positioning pieces are provided with positioning grooves, the width of the positioning grooves corresponds to the width of the steel pads arranged at the ends of the steel arches, and the working platform is symmetrically provided with lifting elements between the two positioning pieces, and a chuck is arranged at the lifting end of the lifting element. The present invention has a simple structure and is easy to operate. Before installation, the two positioning pieces symmetrically arranged on the trolley position the steel arch corresponding to the arch of the subway tunnel, so that the steel arch for the arch installation can be aligned with the tunnel before installation, ensuring the left-right symmetry of the steel arch as a whole after subsequent assembly with the steel arch for the tunnel arch waist installation, and finally ensuring the support stability of the entire steel arch structure of the tunnel.

Description

Technical Field

[0001] The invention belongs to the field of high-speed railway tunnel construction, and in particular relates to a steel arch lifting device for high-speed railway tunnel construction. Background Art

[0002] During the construction of high-speed railway tunnels, steel arch frames are used to reinforce the lining of the excavated tunnels. Due to the large cross-section of the tunnel, the steel arch frames are assembled in sections, including the steel arch frames corresponding to the tunnel vault and the steel arch frames corresponding to the tunnel waist. During construction, the lining and installation of the steel arch frames for the tunnel vault are completed first, and then the flange-shaped steel pads at the ends of the steel arch frames for the tunnel waist and the flange-shaped steel pads at the ends of the steel arch frames for the vault are connected and assembled. In order to ensure the overall stable support of the steel arch frame after lining, the steel arch frame at the tunnel waist is required to be symmetrical on the left and right, so high requirements are placed on the installation position accuracy of the steel arch frame at the tunnel vault.

[0003] At present, three-arm trolleys are often used to install steel arch frames in tunnel construction. Since the three-arm trolley is not equipped with a positioning structure for the steel arch frame for the arch crown, it is necessary to manually adjust the position of the steel arch frame for the arch crown repeatedly when the three-arm trolley grabs and moves the steel arch frame for the arch crown, so as to improve the installation position accuracy at the tunnel arch crown, thereby ensuring that the steel arch frame can be symmetrical as a whole after being assembled with the steel arch frames on the arch waists on both sides of the tunnel. Summary of the invention

[0004] In view of this, the present invention aims to propose a steel arch lifting device for high-speed railway tunnel construction, so as to position and lift the steel arch at the top of the tunnel and ensure the installation position accuracy of the steel arch at the top of the tunnel.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A lifting device for a steel arch frame for high-speed railway tunnel construction comprises a trolley, which moves along a track laid on the tunnel floor. A working platform is arranged on the top of the trolley, and two positioning members are symmetrically arranged at the left and right ends of the working platform. Positioning grooves are respectively provided vertically opposite the sides of the two positioning members. The lower ends of the positioning grooves are closed, and the upper ends extend out of the top surfaces of the positioning members to be open. The width of the positioning grooves corresponds to the width of the steel pads arranged at the ends of the steel arch frame. The distance between the bottoms of the positioning grooves of the two positioning members corresponds to the distance between the upper edges of the two steel pads at the two ends of the steel arch frame. Two lifting elements are symmetrically arranged between the two positioning members on the working platform, and the lifting ends of the two lifting elements are respectively provided with clamps for clamping and fixing the steel arch frame.

[0007] Furthermore, a limiting piece is provided at a position between two positioning pieces on the working platform, and a limiting groove is provided upward on the limiting piece, and a center line of the limiting groove and a center line of the positioning groove of the positioning piece are located in the same vertical plane, and both ends of the limiting groove are open, and a width of the limiting groove corresponds to a width of a cross section of the steel arch frame.

[0008] Furthermore, the two limiting side walls of the limiting groove are respectively provided with second bending portions outwardly and obliquely upwardly.

[0009] Furthermore, two limiting members are symmetrically arranged.

[0010] Furthermore, two positioning side walls of the positioning groove of the positioning member are respectively provided with first bending portions outwardly and obliquely upwardly.

[0011] Furthermore, the chuck includes a support plate and two fixed plates arranged opposite to each other on it, a transverse pushing element is respectively arranged on the outer side of the two fixed plates, the push rods of the two transverse pushing elements respectively pass through the corresponding fixed plates, a pressure block is respectively arranged at the end of the push rods of the two transverse pushing elements, and the two pressure blocks are opposite to each other.

[0012] Furthermore, a support portion is provided on the top surface of the support plate, two end portions of the support portion abut against two fixing plates, and the top surface of the support portion is an upwardly convex curved surface structure.

[0013] Furthermore, a boss is provided at an upper middle portion of the inner side surface of the positioning plate, and a mesh pattern is provided on the side of the boss facing away from the positioning plate.

[0014] Furthermore, the lifting element is a multi-stage cylinder.

[0015] Compared with the prior art, the high-speed railway tunnel construction steel arch lifting device described in the present invention has the following advantages:

[0016] (1) The present invention has a simple structure and is easy to operate. Before installation, two symmetrical positioning members on the trolley position the steel arch frame corresponding to the arch of the subway tunnel, so that the steel arch frame for installing the arch can be aligned with the tunnel before installation. That is, the left and right ends of the steel arch frame for installing the arch are symmetrical relative to the center line of the tunnel, ensuring the accuracy of the steel arch frame lifted by the lifting element to the installation position of the tunnel arch, ensuring the subsequent symmetrical installation of the steel arch frame with the tunnel waist, and finally ensuring the support stability of the entire steel arch frame structure of the tunnel.

[0017] (2) In the present invention, the setting of the limiting member prevents the steel arch frame supported by the two positioning members from shaking left and right, thereby improving the placement stability of the steel arch frame on the working platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of a steel arch lifting device for high-speed railway tunnel construction according to an embodiment of the present invention;

[0020] Figure 2 It is a three-dimensional schematic diagram of a positioning member in an embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of a limiting member in an embodiment of the present invention;

[0022] Figure 4 A three-dimensional schematic diagram of a chuck in an embodiment of the present invention;

[0023] Figure 5 It is the front view of the chuck in the embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1-trolley; 2-working platform; 3-positioning piece; 31-closed end; 32-positioning side wall; 321-first bending part; 33-positioning groove bottom; 34-positioning groove; 4-steel arch; 5-lifting element; 6-chuck; 61-support plate; 63-fixed plate; 64-pressure block; 65-support part; 66-transverse pushing element; 7-track; 8-limiting piece; 81-limiting side wall; 811-second bending part; 82-limiting groove; 9-column. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] like Figure 1As shown, a steel arch lifting device for high-speed railway tunnel construction includes two tracks 7 symmetrically laid on the tunnel ground, and a trolley 1 movably arranged on the track 7, a working platform 2 is arranged on the top of the trolley 1, two positioning members 3 are symmetrically arranged on the left and right ends of the working platform 2, and two limit members 8 and two lifting elements 5 are symmetrically arranged between the two positioning members 3 on the working platform 2. The two positioning members 3 are used to place and position the steel pads at both ends of the steel arch 4 corresponding to the tunnel arch, so that the steel arch 4 corresponding to the arch is arched upward and positioned and supported on the two positioning members 3. The two positioning members 8 are arranged on the working platform 2 through the columns 9, and the positioning members 8 are used to clamp the steel arch 4 supported by the two positioning members 3 to prevent the steel arch 4 from shaking. The lifting element 5 is a multi-stage oil cylinder structure, and a chuck 6 is arranged at its lifting end. The chuck 6 is located below the steel arch frame 4 supported by two positioning members 3. After the steel arch frame is supported upward on the two positioning members 3, the push rod of the lifting element 5 is extended, and the chuck 6 clamps and fixes the steel arch frame 4. Then the push rod of the lifting element 5 continues to push and lift the steel arch frame 4 until the steel arch frame 4 rises to the tunnel arch position. In the present invention, since the two positioning members 3 are symmetrically arranged on the working platform 2, that is, the two positioning members 3 are symmetrically arranged about the tunnel center axis, after positioning and supporting the steel arch frame 4, the steel arch frame 4 is symmetrically arranged about the tunnel center axis, that is, the steel arch frame 4 can be aligned with the tunnel, and after moving straight upward to the tunnel arch position, its installation position accuracy is guaranteed, that is, after installation, the two ends of the steel arch frame 4 of the arch are symmetrical about the tunnel center axis, and after connecting with the steel arch frame of the arch waist and completing the assembly of the steel arch frames of the arch waist on both sides of the tunnel, the overall steel arch frame is guaranteed to be left-right symmetrical, thereby improving the tunnel support strength.

[0028] The specific structure of the steel pad for positioning and supporting the steel arch frame 4 by the two positioning members 3 is as follows: the two positioning members 3 are respectively provided with positioning grooves 34 vertically on the opposite sides, and the structure of the positioning grooves 34 is as follows: Figure 2 As shown, the lower end is closed and the upper end extends out of the top surface of the positioning member 3 to be open, that is, the positioning groove 34 is opened upward. The width of the positioning groove 34, that is, the distance between its two positioning side walls 32, corresponds to the width of the steel pad at the end of the steel arch frame, and the distance between the bottoms 33 of the positioning grooves of the two positioning members 3 corresponds to the distance between the upper edges of the two steel pads at both ends of the steel arch frame 4. The steel arch frame 4 corresponding to the tunnel arch is arched upward, and the steel pads at both ends are inserted into the positioning grooves 34 of the two positioning members 3. The lower edge of the steel pad abuts the closed end 31 of the positioning groove 34, the upper edge of the steel pad abuts the bottom 33 of the positioning groove, and the left and right edges of the steel pad abut the two positioning side walls 32 of the positioning groove. At this time, the steel arch frame 4 is positioned and supported by the two positioning members 3, so that the left and right ends of the steel arch frame 4 are symmetrical about the central axis of the tunnel.

[0029] In the present invention, the two positioning side walls 32 of the positioning groove 34 are respectively provided with first bending portions 321 outwardly and obliquely upwardly. This structure makes the positioning groove 34 open upwardly in a trumpet-shaped structure, which facilitates the steel pad of the steel arch frame to be inserted into the positioning groove of the positioning member 3.

[0030] The limiter 8 limits the position of the steel arch frame. The specific structure is as follows: Figure 3 As shown, the limiting member 8 is provided with a limiting groove 82 upward, the center line of the limiting groove 82 and the center line of the positioning groove 34 of the positioning member 3 are located in the same vertical plane, both ends of the limiting groove 82 are open, and the width of the limiting groove 82 corresponds to the width of the cross section of the steel arch frame. While the steel backing plate of the steel arch frame 4 is inserted into the positioning groove 34 of the positioning member 3 and is positioned and supported by the two positioning members 3, the steel arch frame 4 is inserted into the limiting groove 82 of the limiting member 8 and is clamped by the two limiting side walls 81 of the limiting groove 82, thereby improving the stability of the steel arch frame 4 being positioned and supported by the two positioning members. Preferably, the two limiting side walls 81 of the limiting groove are respectively provided with a second bending portion 821 outwardly and obliquely upwardly, and this structure makes the limiting groove 82 open to a trumpet-shaped structure, which is convenient for the steel arch frame to be inserted into the limiting groove 82.

[0031] In the present invention, the clamp 6 provided at the lifting end of the lifting element 5 is used to clamp and fix the steel arch 4 supported by the two positioning members 3. The structure of the clamp 6 is as follows: Figure 4 , Figure 5 As shown, it includes a support plate 61 and two fixed plates 63 arranged opposite to each other. At this time, the two fixed plates 63 and the support plate 61 form a clamping groove with an opening facing upward, and the center line of the clamping groove is parallel to the center line of the limit groove 82. A horizontal thrust element 66 is arranged on the outside of each fixed plate 63. The horizontal thrust element 66 is preferably an oil cylinder, and its push rod passes through the fixed plate 63 and extends into the clamping groove. A pressing block 64 is arranged at the end of the push rod of each horizontal thrust element 66, and the two pressing blocks 64 are opposite to each other.

[0032] Preferably, a support portion 65 is provided on the top surface of the support plate 61 , and the support portion 65 is located below the two pressing blocks 64 . Both ends of the support portion 65 abut against the positioning plate 62 and the fixing plate 63 , and the top surface of the support portion 65 is an upwardly convex curved structure.

[0033] After the steel arch frame 4 is arched upward, supported by the two positioning members 3 and limited by the two limiting members 8, the steel arch frame 4 is in a stable placement state, and the push rods of the two lifting elements 5 extend upward until the steel arch frame 4 enters the clamping groove of the clamp 6 on the push rod and abuts against the support part 65 of the clamping groove. The push rods of the horizontal push elements 66 on both sides of the clamp 6 extend at the same time until the two pressure heads 64 press and fix the steel arch frame, and the clamp 6 clamps and fixes the steel arch frame 4. The push rods of the lifting element 5 continue to extend upward, and the steel arch frame 4 is lifted to the tunnel arch for installation. In this device, the steel arch frame 4 corresponding to the arch is positioned by the two positioning members 3 before installation, so that its left and right ends are symmetrical about the tunnel center axis. After it is lifted straight to the arch for installation, it can still be symmetrical about the tunnel center axis, so that the steel arch frame corresponding to the tunnel arch waist can be installed symmetrically, ensuring that the overall left and right symmetry of the steel arch frame after assembly is ensured, improving the overall support stability of the steel arch frame, ensuring the support stability of the tunnel, and ensuring the safety of the subway tunnel.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel arch lifting device for high-speed railway tunnel construction, characterized in that: The invention comprises a trolley (1), wherein the trolley (1) moves along a track (7) laid on the tunnel floor, and a working platform (2) is arranged on the top of the trolley (1). Two positioning members (3) are symmetrically arranged at the left and right ends of the working platform (2). Positioning grooves (34) are respectively provided vertically opposite the sides of the two positioning members (3). The lower ends of the positioning grooves (34) are closed, and the upper ends extend out of the top surfaces of the positioning members (3) and are open. The width of the positioning grooves (34) corresponds to the width of the steel pads arranged at the ends of the steel arch frame. The distance between the bottoms (33) of the positioning grooves of the two positioning members (3) corresponds to the distance between the upper edges of the two steel pads at the two ends of the steel arch frame. The working platform (2) has two jacking elements (5) symmetrically arranged between the two positioning members (3), and the jacking ends of the two jacking elements (5) are respectively provided with clamps (6) for clamping and fixing the steel arch frame.

2. The high-speed railway tunnel construction steel arch lifting device according to claim 1 is characterized in that: The working platform (2) is provided with a limiting member (8) between the two positioning members (3); the limiting member (8) is provided with a limiting groove (82) facing upward; the center line of the limiting groove (82) and the center line of the positioning groove of the positioning member (3) are located in the same vertical plane; both ends of the limiting groove (82) are open; and the width of the limiting groove (82) corresponds to the width of the cross section of the steel arch frame.

3. The high-speed railway tunnel construction steel arch lifting device according to claim 2 is characterized by: The two limiting side walls (81) of the limiting groove (82) are respectively provided with second bending portions (811) facing outwards and obliquely upwards.

4. The high-speed railway tunnel construction steel arch lifting device according to claim 2 is characterized by: Two of the limiting members (8) are symmetrically arranged.

5. The high-speed railway tunnel construction steel arch lifting device according to claim 1 is characterized in that: The two positioning side walls (32) of the positioning groove of the positioning member (3) are respectively provided with first bending portions (321) facing outward and obliquely upward.

6. The high-speed railway tunnel construction steel arch lifting device according to claim 1 is characterized by: The chuck (6) comprises a support plate (61) and two fixed plates (63) arranged opposite to each other on the support plate (61). A transverse pushing element (66) is arranged outside the two fixed plates (63). Push rods of the two transverse pushing elements (66) pass through the corresponding fixed plates (63). A pressure block (64) is arranged at the end of the push rods of the two transverse pushing elements (66). The two pressure blocks (64) are opposite to each other.

7. The high-speed railway tunnel construction steel arch lifting device according to claim 6 is characterized by: A support portion (65) is provided on the top surface of the support plate (61), two ends of the support portion (65) abut against two fixing plates (63), and the top surface of the support portion (65) is an upwardly convex curved surface structure.

8. The high-speed railway tunnel construction steel arch lifting device according to claim 1 is characterized by: The lifting element (5) is a multi-stage oil cylinder.

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