Longitudinal annular I-shaped steel frame connector structure and construction method

Abstract

The invention discloses a longitudinal annular I-shaped steel frame connector structure and a construction method. The I-shaped steel frame has good bearing capacity and can play a better supporting role in the construction process. The joint positions of the annular I-shaped steel frame and the longitudinal I-shaped steel frame are connected through the longitudinal and annular I-shaped steel frame joint structure, the longitudinal and annular I-shaped steel frame joint structure comprises two annular connecting steel plates and two longitudinal connecting structures, and the annular connecting steel plates are connected with the ends of the annular I-shaped steel frame in a welded mode. The longitudinal connecting structures are connected with the end parts of the longitudinal I-shaped steel frames in a welding manner; the annular connecting steel plates are fixedly connected with the longitudinal connecting structures through connecting bolts. Axial force and bending moment borne by the longitudinal steel frame and the annular steel frame can be better transmitted, good structural safety and installation convenience are achieved, and the overall safety of a chamber supporting structure is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of deep buried chambers and underground engineering, and particularly relates to a longitudinal annular I-shaped steel frame interface structure and a construction method. Background Art

[0002] I-shaped steel frame support is a commonly used technical form in the construction process of cavern engineering in my country. In order to better fix the cavern structure during the construction process, especially for the surrounding rock with poor geology, it is necessary to support the top and surrounding of the cavern. I-shaped steel frame has good bearing capacity and can play a better supporting role in the construction process. With the increasing number of deep underground cavern projects in my country, the problem of rock burst disasters is becoming more and more prominent. Frequent rock burst disasters threaten the personal safety of construction personnel and the safety of construction machinery and equipment, increase support costs and affect the construction progress. When the rock burst level is high, there will be large-scale block and plate spalling, ejection and flying. In severe cases, tons of rocks will fall from the arch, causing large-scale landslides induced by rock bursts. There is no obvious sign before the rock burst occurs, and its occurrence is sudden, uncertain and random. Therefore, for chamber structures with great burial depth and high surrounding rock pressure, it is necessary to arrange steel frames in the longitudinal and circumferential directions respectively to ensure the structural safety under the longitudinal and lateral earth pressures. At this time, the transmission of axial force and bending moment at the intersection of the circumferential and longitudinal steel frames puts forward extremely high requirements on the setting of the steel frame interface. At present, there is no longitudinal circumferential I-shaped steel frame interface structure with safe structure and convenient installation that can better meet the requirements of on-site construction. Summary of the invention

[0003] In order to make up for the shortcomings of the prior art, the present invention provides a longitudinal and circumferential I-shaped steel frame interface structure and construction method, which can better transmit the axial force and bending moment exerted on the longitudinal and circumferential steel frames, have good structural safety and installation convenience, and improve the overall safety of the chamber support structure.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A longitudinal circumferential I-shaped steel frame interface structure, wherein the circumferential I-shaped steel frame and the longitudinal I-shaped steel frame are connected at the interface position through the longitudinal circumferential I-shaped steel frame interface structure;

[0006] The longitudinal annular I-shaped steel frame interface structure comprises two annular connecting steel plates and two longitudinal connecting structures, wherein the annular connecting steel plates are welded to the ends of the annular I-shaped steel frames; and the longitudinal connecting structures are welded to the ends of the longitudinal I-shaped steel frames;

[0007] The annular connecting steel plate is fixedly connected to the longitudinal connecting structure by connecting bolts.

[0008] Furthermore, the longitudinal connection structure comprises a longitudinal connection steel plate, two annular connection wing plates are respectively welded on both sides of the top surface of the longitudinal connection steel plate, and the corresponding annular connection wing plates on both sides are connected by annular support ribs;

[0009] A gap is arranged between the two annular connecting wing plates and the two annular supporting rib plates on each side.

[0010] Furthermore, the web of the longitudinal I-shaped steel frame is inserted into the gap between the annular connecting wing plate and the annular supporting rib plate, and the longitudinal I-shaped steel frame is fixedly connected to the longitudinal connecting steel plate by welding.

[0011] Furthermore, the longitudinal connecting steel plates of the two longitudinal connecting structures are respectively provided with bolt holes, and the connecting bolts pass through the bolt holes to achieve fixed connection between the two longitudinal connecting steel plates.

[0012] Furthermore, four bolt holes are evenly arranged on the annular connecting steel plate.

[0013] Furthermore, four bolt holes are arranged on the annular connection wing plates of the upper and lower longitudinal connection structures, and are arranged corresponding to the positions of the four bolt holes on the annular connection steel plates.

[0014] Furthermore, connecting bolts are inserted into the bolt holes on the annular connecting wing plate and the annular connecting steel plate to achieve fixed connection between the annular connecting wing plate and the annular connecting steel plate.

[0015] Furthermore, the annular connecting wing plate and the annular supporting rib plate are fixedly connected by welding.

[0016] A construction method for a longitudinal circumferential I-shaped steel frame interface structure comprises the following steps:

[0017] Step 1: insert the web of the longitudinal I-shaped steel frame into the gap between the annular connecting flange and the annular supporting rib of the longitudinal connecting structure, and fix the longitudinal I-shaped steel frame and the longitudinal connecting steel plate by welding, and then connect the upper and lower longitudinal connecting structures by connecting bolts;

[0018] Step 2: After the dimensions of all longitudinal parts meet the design standards, retighten all bolts to ensure reliable connection;

[0019] Step 3: Weld the annular connecting steel plate to the end of the annular I-shaped steel frame;

[0020] Step 4: Fix the annular connecting steel plate and the annular connecting wing plate of the longitudinal connecting structure with connecting bolts. After the dimensions of all annular parts meet the design standards, retighten all bolts to ensure a reliable connection.

[0021] Beneficial effects of the present invention:

[0022] 1) The longitudinal circumferential I-shaped steel frame interface structure of the present invention can simultaneously connect the circumferential and longitudinal steel frames, so that the steel frames in different directions are more effectively connected together, thereby enhancing the integrity and stability between the steel frames and improving the strength, rigidity and impact resistance of the overall structure;

[0023] 2) The present invention provides annular connecting wing plates and annular supporting ribs in the longitudinal connecting structure, which are helpful for the transmission of bending moment and axial force of the longitudinal and annular steel frames, improve the overall stiffness and bearing capacity of the steel frame system, make it have better impact resistance, effectively reduce deformation and distortion, and reduce the risk of rock burst disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is the explosion schematic diagram of the present invention;

[0026] Figure 3 It is a front view of the connection of the present invention;

[0027] Figure 4 It is a top view of the connection of the present invention;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the longitudinal connection structure of the present invention;

[0029] Figure 6 It is a top view of the longitudinal connection structure of the present invention;

[0030] In the figure, 1 is annular I-shaped steel frame, 2 is longitudinal I-shaped steel frame, 3 is annular connecting steel plate, 4 is longitudinal connecting structure, 5 is connecting bolt, 6 is bolt hole, 7 is longitudinal connecting steel plate, 8 is annular connecting wing plate, and 9 is annular supporting rib plate. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with specific implementation modes.

[0032] The present invention provides a longitudinal and circumferential I-shaped steel frame interface structure and a construction method, which can better transmit the axial force and bending moment exerted on the longitudinal and circumferential steel frames, have good structural safety and installation convenience, and improve the overall safety of the chamber support structure.

[0033] like Figure 1 , 2As shown, the circumferential I-shaped steel frame 1 and the longitudinal I-shaped steel frame 2 are connected at the interface position by the longitudinal circumferential I-shaped steel frame interface structure of the present invention; the longitudinal circumferential I-shaped steel frame interface structure includes two circumferential connecting steel plates 3 and two longitudinal connecting structures 4, the circumferential connecting steel plates 3 are welded to the ends of the circumferential I-shaped steel frame 1; the longitudinal connecting structure 4 is welded to the ends of the longitudinal I-shaped steel frame 2; the circumferential connecting steel plates 3 are fixedly connected to the longitudinal connecting structure 4 by connecting bolts 5; the circumferential and longitudinal steel frames are more effectively connected together through the interface structure, the integrity and stability between the steel arch frames are enhanced, and the strength, rigidity and impact resistance of the overall structure are improved.

[0034] like Figure 3-6 As shown, the longitudinal connection structure 4 includes a longitudinal connection steel plate 7, two annular connection wing plates 8 are welded on both sides of the top surface of the longitudinal connection steel plate 7, and the corresponding annular connection wing plates 8 on both sides are connected by annular support ribs 9; a gap is set between the two annular connection wing plates 8 and the two annular support ribs 9 on each side. The web of the longitudinal I-shaped steel frame 2 is inserted into the gap between the annular connection wing plates 8 and the annular support ribs 9, and the longitudinal I-shaped steel frame 2 is fixedly connected to the longitudinal connection steel plate 7 by welding.

[0035] Bolt holes 6 are respectively provided on the longitudinal connecting steel plates 7 of the two longitudinal connecting structures 4, and the connecting bolts 5 pass through the bolt holes 6 to achieve the fixed connection of the two longitudinal connecting steel plates 7. Four bolt holes 6 are evenly provided on the annular connecting steel plate 3. Four bolt holes 6 are provided on the annular connecting wing plates 8 of the upper and lower longitudinal connecting structures 4, and are arranged corresponding to the positions of the four bolt holes 6 on the annular connecting steel plates 3. Connecting bolts 5 are passed through the bolt holes 6 on the annular connecting wing plates 8 and the annular connecting steel plates 3 to achieve the fixed connection of the annular connecting wing plates 8 and the annular connecting steel plates 3. The annular connecting wing plates 8 are fixedly connected to the annular supporting ribs 9 by welding, and the annular supporting ribs 9 are fixedly connected to the annular connecting wing plates 8 by welding, which further improves the axial force and bending moment transmission of the annular steel frame and enhances the overall stiffness and bearing capacity of the annular steel frame. The wing plates of the longitudinal I-shaped steel frame 2 are clamped by the annular connecting steel plates 3 and the annular connecting wing plates 8 through connecting bolts 5, which improves the overall rigidity and bearing capacity of the longitudinal steel frame and can effectively reduce deformation and distortion.

[0036] The present invention also provides a construction method of a longitudinal annular I-shaped steel frame interface structure, comprising the following steps:

[0037] Step 1: insert the web of the longitudinal I-shaped steel frame 2 into the gap between the annular connecting flange 8 and the annular supporting rib 9 of the longitudinal connecting structure 4, and fix the longitudinal I-shaped steel frame 2 and the longitudinal connecting steel plate 7 by welding, and then connect the upper and lower longitudinal connecting structures 4 by connecting bolts 5;

[0038] Step 2: After the dimensions of all longitudinal parts meet the design standards, retighten all bolts to ensure reliable connection;

[0039] Step 3: Weld the annular connecting steel plate 3 to the end of the annular I-shaped steel frame 1;

[0040] Step 4: Fix the annular connecting steel plate 3 and the annular connecting wing plate 8 of the longitudinal connecting structure 4 with the connecting bolts 5. After the dimensions of all annular parts meet the design standards, retighten all the bolts to ensure reliable connection.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The content of the present invention is not limited to the embodiments listed, and any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the description of the present invention are covered by the claims of the present invention.

Claims

1. A longitudinal circumferential I-shaped steel frame interface structure, characterized in that: The circumferential I-shaped steel frame (1) and the longitudinal I-shaped steel frame (2) are connected at the interface position via the longitudinal circumferential I-shaped steel frame interface structure; The longitudinal annular I-shaped steel frame interface structure comprises two annular connecting steel plates (3) and two longitudinal connecting structures (4); the annular connecting steel plates (3) are welded to the ends of the annular I-shaped steel frames (1); the longitudinal connecting structures (4) are welded to the ends of the longitudinal I-shaped steel frames (2); The annular connecting steel plate (3) and the longitudinal connecting structure (4) are fixedly connected via connecting bolts (5).

2. A longitudinal annular I-shaped steel frame interface structure according to claim 1, characterized in that: The longitudinal connection structure (4) comprises a longitudinal connection steel plate (7), two annular connection wing plates (8) are respectively welded on both sides of the top surface of the longitudinal connection steel plate (7), and the corresponding annular connection wing plates (8) on both sides are connected via annular support ribs (9); A gap is provided between the two annular connecting wing plates (8) and the two annular supporting rib plates (9) on each side.

3. A longitudinal annular I-shaped steel frame interface structure according to claim 2, characterized in that: The web of the longitudinal I-shaped steel frame (2) is inserted into the gap between the annular connecting wing plate (8) and the annular supporting rib plate (9), and the longitudinal I-shaped steel frame (2) and the longitudinal connecting steel plate (7) are fixedly connected by welding.

4. A longitudinal annular I-shaped steel frame interface structure according to claim 3, characterized in that: Bolt holes (6) are respectively provided on the longitudinal connecting steel plates (7) of the two longitudinal connecting structures (4), and the connecting bolts (5) pass through the bolt holes (6) to achieve fixed connection of the two longitudinal connecting steel plates (7).

5. The longitudinal annular I-shaped steel frame interface structure according to claim 4, characterized in that: Four bolt holes (6) are evenly arranged on the annular connecting steel plate (3).

6. A longitudinal annular I-shaped steel frame interface structure according to claim 5, characterized in that: Four bolt holes (6) are arranged on the annular connection wing plates (8) of the upper and lower longitudinal connection structures (4), and are arranged in positions corresponding to the four bolt holes (6) on the annular connection steel plates (3).

7. A longitudinal annular I-shaped steel frame interface structure according to claim 6, characterized in that: Connecting bolts (5) are inserted into the bolt holes (6) on the annular connecting wing plate (8) and the annular connecting steel plate (3), thereby achieving fixed connection between the annular connecting wing plate (8) and the annular connecting steel plate (3).

8. The longitudinal annular I-shaped steel frame interface structure according to claim 7, characterized in that: The annular connecting wing plate (8) and the annular supporting rib plate (9) are fixedly connected by welding.

9. A construction method for a longitudinal annular I-shaped steel frame interface structure, characterized in that: The steps include: Step 1: insert the web of the longitudinal I-shaped steel frame (2) into the gap between the annular connecting wing plate (8) and the annular supporting rib plate (9) of the longitudinal connecting structure (4), and fix the longitudinal I-shaped steel frame (2) and the longitudinal connecting steel plate (7) by welding, and then connect the upper and lower longitudinal connecting structures (4) by connecting bolts (5); Step 2: After the dimensions of all longitudinal parts meet the design standards, retighten all bolts to ensure reliable connection; Step 3: Welding the annular connecting steel plate (3) to the end of the annular I-shaped steel frame (1); Step 4: The annular connecting steel plate (3) is fixedly connected to the annular connecting wing plate (8) of the longitudinal connecting structure (4) by means of connecting bolts (5). After the dimensions of all annular parts meet the design standards, all bolts are tightened again to ensure reliable connection.

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