Length telescopic adjuster, steel frame connecting device and connecting method

Abstract

The invention relates to the field of tunnel engineering. The invention relates to a length adjusting device, in particular to a length telescopic adjuster, a steel frame connecting device and a connecting method. In order to solve the problem that an existing steel frame is difficult to connect during partition distribution excavation, the invention provides a length telescopic adjuster, a steel frame connecting device and a connecting method, the length telescopic adjuster is added on the basis of a traditional steel frame, and two steel frames are connected through the length telescopic adjuster, so that the length of a steel frame structure is adjustable; the length change of the joint of the steel frame structure is adapted, and the aim of effective connection along the peripheral steel frame of the tunnel is achieved.

Description

Technical Field

[0001] The present invention relates to the field of tunnel engineering, and more specifically, to a length expansion and contraction adjuster, a steel frame connection device and a connection method. Background Art

[0002] Excavation in sections and steps is a common method in tunnel construction. During the design, the steel frame and other supporting components around the corresponding tunnel are designed according to the sections and blocks. During construction, they are assembled in sections, and finally a supporting structure distributed around the tunnel is formed. However, in actual construction, the length of the steel frame designed according to the tunnel excavation contour is fixed and cannot be adjusted. In actual construction, there is often a problem of installation failure. The main reasons are:

[0003] (1) There is an error in the length of the steel frame;

[0004] (2) There are errors in the tunnel excavation contour, resulting in the steel frame installation position not being consistent with the designed position;

[0005] (3) There is a deflection error when the steel frame is erected, and there is an angle with the design axis;

[0006] (4) During partial excavation, the deformation of the surrounding rock excavated first is greater than that of the surrounding rock excavated later, causing the steel frame installed first to deform along with the surrounding rock, and the subsequent steel frames cannot be connected when they are connected. Summary of the invention

[0007] The purpose of the present invention is to address the problem of difficulty in connecting existing steel frames during zoned distributed excavation, and to provide a length telescopic adjuster, a steel frame connecting device and a connection method. A length telescopic adjuster is added to the traditional steel frame, and two steel frames are connected through the length telescopic adjuster to achieve adjustable length of the steel frame structure, adapt to the length changes at the connection of the steel frame structure, and achieve the purpose of effectively connecting the steel frames along the periphery of the tunnel.

[0008] In order to achieve these purposes and other advantages according to the present invention, a length telescopic adjuster is provided, comprising:

[0009] Activity tube;

[0010] Two fixed tubes are respectively threadedly connected to the two ends of the movable tube, and the fixed tubes are limited to rotate by external force, and when the movable tube rotates, the two fixed tubes move closer to or farther from each other;

[0011] Two jacking pieces, the connection between the fixed tube and the movable tube is fixed by the jacking pieces.

[0012] Furthermore, in the length telescopic adjuster, the tightening piece is a nut, and when the fixed tube extends into the movable tube, the tightening piece is threadedly installed on the fixed tube and conflicts with the movable tube; when the movable tube extends into the fixed tube, the tightening piece is threadedly installed on the movable tube and conflicts with the fixed tube.

[0013] Furthermore, in the described length telescopic adjuster, both ends of the inner side of the movable tube are provided with internal threads, and the directions of the internal threads at both ends are opposite, the outer side of the fixed tube is provided with external threads, the fixed tube extends into the movable tube and is threadedly connected to the movable tube, and the tightening piece is threadedly installed on the fixed tube.

[0014] Furthermore, in the described length telescopic adjuster, both ends of the outer side of the movable tube are provided with external threads, and the directions of the external threads at both ends are opposite, the inner side of the fixed tube is provided with internal threads, the movable tube extends into the fixed tube and is threadedly connected to the fixed tube, and the tightening piece is threadedly installed on the movable tube.

[0015] The present invention also provides a grid steel frame connection device with adjustable length, comprising the above-mentioned length telescopic regulator, and further comprising:

[0016] Steel plates, four of the steel plates are connected to the outside of the fixed pipe at intervals, and the four steel plates are respectively used to be connected to the four main bars of the grid steel frame.

[0017] Furthermore, in the described length-adjustable grid steel frame connection device, the described length telescopic adjusters are arranged in two groups, the movable tubes of the two groups of described length telescopic adjusters are connected by a connecting piece, and the outer sides of the described fixed tubes are connected with two described steel plates at intervals.

[0018] The present invention also provides a grid steel frame connection method, which is applied to the grid steel frame connection device and comprises the following steps:

[0019] S1. After welding the steel plate on the fixing plate of the length telescopic adjuster, the length telescopic adjuster is arranged between two grid steel frames;

[0020] S2, welding the four steel plates on one side of the length expansion and contraction adjuster to the four main bars of the grid steel frame on the same side, respectively, to complete the connection between the length expansion and contraction adjuster and the two grid steel frames;

[0021] S3. According to the actual situation on site, the movable tube is rotated to adjust the length of the length telescopic adjuster, and after adjusting the distance between the two grid steel frames, the jacking member is installed to fix the fixed tube and the movable tube;

[0022] S4, pouring cement mortar into the movable pipe and the fixed pipe.

[0023] The present invention also provides a length-adjustable steel frame connection device, comprising the above-mentioned length telescopic adjuster, and further comprising:

[0024] One end of two fixed end plates is respectively connected to the two steel frames, and the two fixed pipes of the length telescopic adjuster are respectively connected to the two fixed end plates.

[0025] Furthermore, in the length-adjustable steel frame connection device, the length telescopic adjusters are arranged in multiple groups, and the multiple groups of length telescopic adjusters are arranged in parallel between the two fixed end plates.

[0026] The present invention also provides a connection method of a steel frame, which is applied to the above-mentioned steel frame connection device and comprises the following steps:

[0027] S1, setting the length expansion and contraction adjuster between two steel frames, and the two fixed pipes facing the two steel frames respectively;

[0028] S2, welding the two fixed end plates to the two steel frames respectively, and then welding the fixed pipes to the steel frames on the same side respectively;

[0029] S3. According to the actual situation on site, the movable tube is rotated to adjust the length of the length telescopic adjuster, and after adjusting the distance between the two steel frames, the jacking member is installed to fix the fixed tube and the movable tube;

[0030] S4, pouring cement mortar into the movable pipe and the fixed pipe.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention adds a length telescopic adjuster on the basis of the traditional steel frame, connects two steel frames through the length telescopic adjuster, realizes the adjustable length of the steel frame structure, adapts to the length change of the connection of the steel frame structure, and achieves the purpose of effectively connecting the steel frames along the periphery of the tunnel.

[0033] 2. The length telescopic adjuster of the present invention has a simple structure and consists of two fixed tubes and a movable tube. The movable tube and the fixed tube are connected by respectively setting internal and external threads. After the two fixed tubes are connected to the steel frame, the length of the length telescopic adjuster is adjusted by rotating the movable tube, and locked by setting a tightening piece to prevent relative rotation between the fixed tube and the movable tube.

[0034] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is a schematic diagram of the connection between the length telescopic adjuster and the steel frame described in one embodiment of the present invention;

[0036] Figure 2 It is a structural schematic diagram of a length telescopic adjuster described in one embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the length telescopic adjuster in one embodiment of the present invention when it is at its shortest;

[0038] Figure 4 This is a schematic diagram of the structure of the length telescopic adjuster in one embodiment of the present invention when it is at its longest;

[0039] Figure 5 is a schematic structural diagram of a length telescopic adjuster according to another embodiment of the present invention;

[0040] Figure 6 It is a structural schematic diagram of the grid steel frame connection device described in one embodiment of the present invention;

[0041] Figure 7 It is a structural schematic diagram of a grid steel frame connecting device according to another embodiment of the present invention;

[0042] Figure 8 It is a structural schematic diagram of a steel frame connection device according to an embodiment of the present invention;

[0043] Fig. 9 It is a schematic structural diagram of a steel frame connecting device according to another embodiment of the present invention.

[0044] Wherein, the reference numerals represent:

[0045] Movable pipe 1; fixed pipe 2; tightening piece 3; steel plate 4; end plate 5; grid steel frame 6; section steel frame 7. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0047] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] like Figure 2-4As shown, an embodiment of the present invention provides a length telescopic adjuster, comprising:

[0049] Activity tube 1;

[0050] Two fixed tubes 2, both ends of the inner side of the movable tube 1 are provided with internal threads, and the directions of the internal threads at both ends are opposite, the outer side of the fixed tube 2 is provided with external threads, the fixed tube 2 extends into the movable tube 1 and is threadedly connected with it, and the tightening piece 3 is threadedly installed on the fixed tube 2.

[0051] Two jacking pieces 3, the connection between the fixed tube 2 and the movable tube 1 is fixed by the jacking pieces 3. The jacking pieces 3 are nuts, and when the fixed tube 2 extends into the movable tube 1, the jacking pieces 3 are threadedly mounted on the fixed tube 2 and abut against the movable tube 1.

[0052] In this embodiment, if Figure 3-Figure 4 As shown, the design method of the length regulator is as follows:

[0053] L is the length of the length adjuster; L1 is the length of the fixed steel pipe; L2 is the length of the movable steel pipe; Δ1 is the minimum adjustment distance; Δ2 is the maximum adjustment distance; a is the reduction value relative to the design standard length, which is 20cm; b is the increase value relative to the design standard length, which is 10 to 40cm; C is the length of the threaded connection between the fixed pipe 2 and the rotating movable pipe 1, which is determined according to the actual force conditions;

[0054] The relationships are as follows:

[0055] 2L1+Δ1=Lb

[0056] 2L1+Δ2=L+a

[0057] Δ2-Δ1=a+b

[0058] The calculation method of the length of the movable steel pipe is as follows:

[0059] L2=2C+Δ1

[0060] like Figure 5 As shown, an embodiment of the present invention provides a length telescopic adjuster, comprising:

[0061] Activity tube 1;

[0062] Two fixed tubes 2, both ends of the outer side of the movable tube 1 are provided with external threads, and the external threads at both ends are in opposite directions, the inner side of the fixed tube 2 is provided with internal threads, the movable tube 1 extends into the fixed tube 2 and is threadedly connected with it, and the tightening piece 3 is threadedly installed on the movable tube 1.

[0063] Two jacking pieces 3, the connection between the fixed tube 2 and the movable tube 1 is fixed by the jacking pieces 3. The jacking pieces 3 are nuts, and when the movable tube 1 is inserted into the fixed tube 2, the jacking pieces 3 are threadedly mounted on the movable tube 1 and abut against the fixed tube 2.

[0064] The present invention also provides a grid steel frame 6 connection device with adjustable length, such as Figure 6 As shown, it includes the above-mentioned length telescopic regulator, and also includes:

[0065] Steel plates 4 , four of the steel plates 4 are connected to the outside of the fixed pipe 2 at intervals, and the four steel plates 4 are respectively used to be connected to the four main bars of the grid steel frame 6 .

[0066] In this embodiment, when the grid steel frame 6 connecting device connects two grid steel frames 6, the steel plate 4 is first welded to the fixed pipe 2, and then the steel plate 4 is welded to the main reinforcement of the grid steel frame 6. After the welding is completed, the position relationship between the steel frame and the length expansion and contraction adjuster is as follows: Figure 1 shown.

[0067] Preferably, as another embodiment of the present invention, Figure 7 As shown, the length telescopic adjusters are arranged in two groups, the movable tubes 1 of the two groups of the length telescopic adjusters are connected by a connecting piece, and the outer sides of the fixed tubes 2 are connected with two steel plates 4 at intervals.

[0068] The present invention also provides a method for connecting a grid steel frame 6, which is applied to the above-mentioned grid steel frame 6 connecting device and comprises the following steps:

[0069] S1, after welding the steel plate 4 on the fixing plate of the length telescopic adjuster, the length telescopic adjuster is arranged between two grid steel frames 6;

[0070] S2, welding the four steel plates 4 on one side of the length expansion and contraction adjuster to the four main bars of the grid steel frame 6 on the same side, respectively, to complete the connection between the length expansion and contraction adjuster and the two grid steel frames 6;

[0071] S3. According to the actual situation on site, the movable tube 1 is rotated to adjust the length of the length telescopic adjuster, and after adjusting the distance between the two grid steel frames 6, the jacking member 3 is installed to fix the fixed tube 2 and the movable tube 1;

[0072] S4, pouring cement mortar into the movable tube 1 and the fixed tube 2.

[0073] The present invention also provides a length-adjustable steel frame 7 connection device, such as Figure 8 As shown, it includes the above-mentioned length telescopic adjuster and also includes:

[0074] One end of two fixed end plates 5 is respectively connected to the two steel frames 7 , and the two fixed pipes 2 of the length telescopic adjuster are respectively connected to the two fixed end plates 5 .

[0075] Preferably, as another embodiment of the present invention, Fig. 9 As shown, the length telescopic adjusters are arranged in multiple groups, and the multiple groups of length telescopic adjusters are arranged in parallel between the two fixed end plates 5.

[0076] The present invention also provides a connection method of a steel frame 7, which is applied to the above-mentioned steel frame 7 connection device, and comprises the following steps:

[0077] S1, the length expansion and contraction adjuster is arranged between two steel frames 7, and the two fixed pipes 2 are respectively facing the two steel frames 7;

[0078] S2, welding the two fixed end plates 5 to the two steel frames 7 respectively, and then welding the fixed pipe 2 to the steel frames 7 on the same side respectively;

[0079] S3. According to the actual situation on site, the movable tube 1 is rotated to adjust the length of the length telescopic adjuster, and after adjusting the distance between the two steel frames 7, the jacking member 3 is installed to fix the fixed tube 2 and the movable tube 1;

[0080] S4, pouring cement mortar into the movable tube 1 and the fixed tube 2.

[0081] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A length expansion and contraction adjuster, characterized in that: include: Activity tube; Two fixed tubes are respectively threadedly connected to the two ends of the movable tube, and the fixed tubes are limited to rotate by external force, and when the movable tube rotates, the two fixed tubes move closer to or farther from each other; Two jacking pieces, the connection between the fixed tube and the movable tube is fixed by the jacking pieces.

2. A length expansion and contraction adjuster as claimed in claim 1, characterized in that: The pressing piece is a nut. When the fixed tube extends into the movable tube, the pressing piece is threadedly installed on the fixed tube and conflicts with the movable tube; when the movable tube extends into the fixed tube, the pressing piece is threadedly installed on the movable tube and conflicts with the fixed tube.

3. A length expansion and contraction adjuster as claimed in claim 2, characterized in that: Both ends of the inner side of the movable tube are provided with internal threads, and the directions of the internal threads at both ends are opposite. The outer side of the fixed tube is provided with external threads. The fixed tube extends into the movable tube and is threadedly connected with the movable tube. The tightening piece is threadedly installed on the fixed tube.

4. A length expansion and contraction adjuster as claimed in claim 2, characterized in that: Both ends of the outer side of the movable tube are provided with external threads, and the external threads at both ends are in opposite directions. The inner side of the fixed tube is provided with internal threads. The movable tube extends into the fixed tube and is threadedly connected with the fixed tube. The tightening piece is threadedly installed on the movable tube.

5. A grid steel frame connection device with adjustable length, characterized in that: The device comprises the length telescopic adjuster as claimed in any one of claims 1 to 4, and further comprises: Steel plates, four of the steel plates are connected to the outside of the fixed pipe at intervals, and the four steel plates are respectively used to be connected to the four main bars of the grid steel frame.

6. A grid steel frame connection device with adjustable length as claimed in claim 5, characterized in that: The length telescopic adjusters are arranged in two groups, the movable tubes of the two groups of length telescopic adjusters are connected by a connecting piece, and the outer side of the fixed tube is connected with two steel plates at intervals.

7. A method for connecting a grid steel frame, applied to the grid steel frame connecting device according to claim 5 or 6, comprising the following steps: S1. After welding the steel plate on the fixing plate of the length telescopic adjuster, the length telescopic adjuster is arranged between two grid steel frames; S2, welding the four steel plates on one side of the length expansion and contraction adjuster to the four main bars of the grid steel frame on the same side, respectively, to complete the connection between the length expansion and contraction adjuster and the two grid steel frames; S3. According to the actual situation on site, the movable tube is rotated to adjust the length of the length telescopic adjuster, and after adjusting the distance between the two grid steel frames, the jacking member is installed to fix the fixed tube and the movable tube; S4, pouring cement mortar into the movable pipe and the fixed pipe.

8. A length-adjustable steel frame connection device, characterized in that: The device comprises the length telescopic adjuster as claimed in any one of claims 1 to 4, and further comprises: One end of two fixed end plates is respectively connected to the two steel frames, and the two fixed pipes of the length telescopic adjuster are respectively connected to the two fixed end plates.

9. The length-adjustable steel frame connection device according to claim 8, characterized in that: The length expansion and contraction adjusters are arranged in multiple groups, and the multiple groups of length expansion and contraction adjusters are arranged in parallel between the two fixed end plates.

10. A method for connecting a section steel frame, applied to the section steel frame connecting device as claimed in claim 8 or 9, comprising the following steps: S1, setting the length expansion and contraction adjuster between two steel frames, and the two fixed pipes facing the two steel frames respectively; S2, welding the two fixed end plates to the two steel frames respectively, and then welding the fixed pipes to the steel frames on the same side respectively; S3. According to the actual situation on site, the movable tube is rotated to adjust the length of the length telescopic adjuster, and after adjusting the distance between the two steel frames, the jacking member is installed to fix the fixed tube and the movable tube; S4, pouring cement mortar into the movable pipe and the fixed pipe.

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