Length adjustable tiered let arch brace connection device and method of use

Abstract

The application discloses a length-adjustable hierarchical yield arch support connecting device, which comprises a connecting box body, a slot hole with one end being open is arranged in the interior of the connecting box body, a connecting box pusher in sliding connection is arranged in the interior of the slot hole, one end of the connecting box pusher penetrates and extends to the outside of the slot hole, a spring one is arranged between the one end of the connecting box pusher and the bottom of the slot hole, an elastic piece is arranged between the one end of the connecting box pusher located at the outside of the slot hole and the outside of the connecting box pusher, a connecting seat plate is connected to the one end of the connecting box pusher and the connecting box body through fixing bolts, a sleeve is fixed to one side of the two connecting seat plates through bolts, the release displacement amount of the telescopic steel frame can be effectively set, a large supporting force is gradually provided in the displacement release process, and the problem that the steel support is subjected to yield damage due to insufficient release displacement amount or insufficient supporting force provided in the release process is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel support construction, in particular to a length-adjustable hierarchical yielding anti-arch support connecting device. BACKGROUND

[0002] At present, steel arch support is a common way of tunnel support. It has good adaptability to conventional strata and can effectively control the deformation of tunnel surrounding rock. However, with the rapid development of tunnel engineering in China, tunnels will inevitably pass through high ground stress and weak surrounding rock strata. If conventional steel arch supports are still used, concrete spalling, cracking, arch support distortion and other large deformation disasters may occur during construction or operation, which poses a great challenge to the safety of construction personnel and later operation. Therefore, it is urgent to improve the current steel arch support.

[0003] To adapt to the deformation of soft surrounding rock in high ground stress areas, many scientific and technical personnel have proposed a telescopic steel support based on the principles of the New Austrian Tunneling Method (NATM), the relationship between the deformation convergence curve of surrounding rock and the support characteristic curve. However, the current telescopic steel support is not mature enough. On the one hand, the released displacement is uncertain. On the other hand, it can only release a certain amount of displacement or provide a small amount of support force while releasing, and then provide a large amount of support force. This may cause the released steel arch support to still need to bear a large amount of surrounding rock pressure, resulting in damage to the arch support. In addition, during construction, temporary changes or improper operation by construction personnel may result in insufficient length of the segmented arch support, making it impossible to implement arch support connection at the designed position, and ultimately causing the arch support connection to fail due to stress concentration at a position other than the original designed position. This seriously threatens the stability and safety of tunnel support. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the existing defects and provide a length-adjustable hierarchical yielding anti-arch support connecting device that can effectively set the release displacement of the telescopic steel support and gradually provide a large amount of support force during the displacement release process, effectively solving the problem of yield and damage to the steel support due to insufficient release displacement or insufficient support force provided during the release process. This can effectively solve the problems in the background art.

[0005] In order to achieve the above object, the application provides the following technical scheme: a length-adjustable hierarchical yield-resistant arch connecting device, comprising a connecting box body, an open slot is arranged in the interior of the connecting box body, a slidingly connected connecting box pusher is arranged in the interior of the slot, one end of the connecting box pusher penetrates and extends to the outside of the slot, a spring one is arranged between the one end of the connecting box pusher and the bottom of the slot, an elastic member is arranged between the one end of the connecting box pusher located outside the slot and the outside of the connecting box pusher, a connecting seat plate is connected to the end of the connecting box pusher opposite to the connecting box body through a fixing bolt, a sleeve is fixed to one side of each of the two connecting seat plates through a bolt, a steel arch is arranged on the outside of the sleeve, and the steel arch is fixed to the sleeve through a bolt.

[0006] Further, the elastic member comprises an adjusting ring arranged on the outside of the connecting box pusher, a spring support is fixed to one side of the adjusting ring, and a spring two is arranged between one side of the spring support and the connecting box pusher.

[0007] Further, a pair of bolt holes are uniformly arranged on the steel arch and the spring support, and the bolt holes correspond to the bolts.

[0008] Further, a long-strip-shaped bolt through hole is uniformly arranged on the connecting box body, the long-strip-shaped bolt through hole is arranged along the length direction of the connecting box body, concave-convex surfaces are uniformly arranged on the connecting box body near the long-strip-shaped bolt through hole, and a protective cover capable of being automatically opened is arranged on the outside of the long-strip-shaped bolt through hole.

[0009] Further, a high-strength shear-resistant bolt for fixing the connecting box pusher is arranged in the interior of the long-strip-shaped bolt through hole, and a pad is arranged between the high-strength shear-resistant bolt and the connecting box body, and the pad is located on the side opposite to the concave-convex surfaces of the connecting box body.

[0010] Further, the length of the connecting box pusher is not less than the length of the spring two, the length of the spring one is not less than the length of the spring two, and the rigidity of the spring one is less than the rigidity of the spring two.

[0011] Further, the connecting box pusher is hollow, and the cross section of the connecting box pusher is in a convex shape.

[0012] A use method of a length-adjustable hierarchical yield-resistant arch connecting device,

[0013] Step one: first, the connecting position of the connecting sleeve is determined according to the length of the steel arch, then the bolt holes on the steel arch and the bolt holes on the connecting sleeve are placed in correspondence, and the steel arch and the connecting sleeve are fixed through bolts;

[0014] Step two: then adjust the elastic member, insert the one end of the connecting box pusher into the slot hole of the connecting box body, and then fix the connecting box pusher and the connecting box body through the high-strength shear bolt;

[0015] Step three: connect and fix the connecting seat plate on the connecting box body with the connecting sleeve of the other through the fixing bolt;

[0016] Step four: connect and fix the connecting sleeve on the connecting box body with the upper end of the steel arch through the bolt;

[0017] Step five: finally, according to the predetermined release displacement, open the protective cover of the high-strength shear bolt, then fix the connecting box body and the connecting box pusher through the high-strength shear bolt, and close the protective cover, so as to complete the installation.

[0018] Further, when the elastic member is adjusted, the position of the adjusting ring on the connecting box pusher is moved, the spring two is moved by the adjusting ring, and when the corresponding position is adjusted, the adjusting ring is fixed on the outside of the connecting box pusher.

[0019] Compared with the prior art, the beneficial effects of the length-adjustable hierarchical anti-arch connecting device are that the length-adjustable hierarchical anti-arch connecting device,

[0020] 1. The bolt connection position of the adjusting sleeve and the arch is adjusted, so that the length of the segment arch is elongated and effectively connected due to improper operation or temporary change in construction.

[0021] 2. The arch displacement can be released sufficiently, and the elastic force of the spring between the connecting box pusher and the connecting box body can provide larger resistance in the displacement release process, so that the elastic force and the resistance are combined, and the instability and yield failure of the arch are prevented. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the present application;

[0023] Figure 2 is a structural schematic diagram of the present application in use;

[0024] Figure 3 is a structural schematic diagram of the connecting box pusher of the present application;

[0025] Figure 4 is a structural schematic diagram of the connecting box body of the present application;

[0026] Figure 5 is a structural schematic diagram of the connecting box body of the present application;

[0027] Figure 6The sleeve connecting structure of the present application is shown in the figure.

[0028] In the figure: 1 connecting box body, 2 slot hole, 3 connecting box push body, 4 spring one, 5 spring two, 6 bolt, 7 sleeve, 8 steel arch, 9 long strip bolt through hole, 10 concave-convex surface, 11 protective cover, 12 high-strength shear-resistant bolt, 13 cushion block, 14 connecting seat plate spring support, 15 bolt hole, 16 adjusting ring, 17 spring support. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Please refer to Figures 1-6 The present application provides a technical solution: a length-adjustable hierarchical yield-resistant arch connecting device, which comprises a connecting box body 1, the inside of the connecting box body 1 is provided with a slot hole 2 with one end open, the inside of the slot hole 2 is provided with a connecting box push body 3 connected in sliding mode, one end of the connecting box push body 3 penetrates and extends to the outside of the slot hole 2, and a spring one 4 is arranged between the one end of the connecting box push body 3 and the bottom of the slot hole 2, and an elastic member is arranged between the one end of the connecting box push body 3 located outside the slot hole 2 and the outside of the connecting box push body 3, one end of the connecting box push body 3 and the connecting box body 1 are both connected with a connecting seat plate 14 through a fixed bolt, one side of each of the two connecting seat plates 14 is fixed with a sleeve 7 through a bolt, the outside of the sleeve 7 is provided with a steel arch 8, the steel arch 8 is fixed with the sleeve 7 through a bolt 6, the elastic member comprises an adjusting ring 16 arranged on the outside of the connecting box push body 3, one side of the adjusting ring 16 is fixed with a spring support 17, one side of the spring support 17 and the connecting box push body 3 are provided with a spring two 5, the steel arch 8 and the spring support 17 are both uniformly provided with a corresponding bolt hole 15, the bolt hole 15 corresponds to the bolt 6, the connecting box body 1 is uniformly provided with a long strip bolt through hole 9, the long strip bolt through hole 9 is arranged along the length direction of the connecting box body 1, the connecting box body 1 is uniformly provided with a concave-convex surface 10 at the position close to the long strip bolt through hole 9, and the outside of the long strip bolt through hole 9 is provided with an automatically openable protective cover 11, the inside of the long strip bolt through hole 9 is provided with a high-strength shear-resistant bolt 12 for fixing the connecting box push body 3, and the high-strength shear-resistant bolt 12 and the connecting box body 1 are provided with a cushion block 13, the cushion block 13 is located on the side opposite to the concave-convex surface 10 of the connecting box body 1, the length of the connecting box push body 3 is not less than the length of the spring two 5, the length of the spring one 4 is not less than the length of the spring two 5, the rigidity of the spring one 4 is less than the rigidity of the spring two 5, the connecting box push body 3 is hollow, and the cross section of the connecting box push body 3 is in a convex letter type structure.

[0031] A method for using a length-adjustable hierarchical anti-arching frame connecting device,

[0032] Step one: first determine the connection position of the connecting sleeve 7 according to the length of the steel arch frame 8, then place the bolt hole 15 on the steel arch frame 8 in correspondence with the bolt hole 15 on the connecting sleeve 7, and fix the steel arch frame 8 and the connecting sleeve 7 through the bolt 6;

[0033] Step two: adjust the elastic member, insert one end of the connecting box pusher 3 into the slot hole 2 of the connecting box body 1, and then fix the connecting box pusher 3 and the connecting box body 1 through the high-strength shear bolt 12;

[0034] Step three: connect and fix the connecting seat plate 14 on the connecting box body 1 with another connecting sleeve 7 through the fixing bolt;

[0035] Step four: connect and fix the connecting sleeve 7 on the connecting box body 1 with the upper steel arch frame 8 through the bolt 6;

[0036] Step five: finally, according to the predetermined release displacement, open the protective cover 11 of the high-strength shear bolt 12, then fix the connecting box body 1 and the connecting box pusher 3 through the high-strength shear bolt 12, and close the protective cover 11, so as to complete the installation. When adjusting the elastic member, move the adjusting ring 16 on the connecting box pusher 3, move the spring 5 driven by the adjusting ring 16, fix the adjusting ring 16 on the outside of the connecting box pusher 3 when adjusting to the corresponding position, and connect the adjusting sleeve 7 and the bolt 6 of the steel arch frame 8, so that the length of the segment arch frame is elongated and effectively connected due to improper operation or temporary change in construction, not only can the arch frame displacement be released enough, but also can provide larger resistance in stages during the displacement release process of the telescopic arch frame through the friction between the bolt and the connecting box body 1, the spring 4 at the bottom of the empty slot, and the spring 5 between the connecting box pusher 3 and the connecting box body 1, so as to achieve the effect of combined resistance, thereby ensuring that the arch frame does not lose stability and yield failure.

[0037] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of using a length-adjustable, graded anti-arching frame connection device, characterized in that, The device includes a length-adjustable graded anti-arching frame connection device, comprising a connecting box body (1), the connecting box body (1) having a slot (2) with one end open inside, a connecting box pusher (3) slidably connected inside the slot (2), one end of the connecting box pusher (3) penetrating and extending to the outside of the slot (2), and a spring (4) between one end of the connecting box pusher (3) and the bottom of the slot (2), and an elastic element between the end of the connecting box pusher (3) located outside the slot (2) and the outside of the connecting box pusher (3), and a connecting seat plate (14) connected to the opposite ends of the connecting box pusher (3) and the connecting box body (1) by fixing bolts. A sleeve (7) is fixed to one side of the receiving plate (14) by bolts. A steel arch frame (8) is provided on the outside of the sleeve (7). The steel arch frame (8) is fixed to the sleeve (7) by bolts (6). The elastic element includes an adjusting ring (16) provided on the outside of the connecting box push body (3). A spring support (17) is fixed on one side of the adjusting ring (16). A second spring (5) is provided between one side of the spring support (17) and the connecting box push body (3). The length of the connecting box push body (3) is not less than the length of the second spring (5). The length of the first spring (4) is not less than the length of the second spring (5). The stiffness of the first spring (4) is less than the stiffness of the second spring (5). The method of use includes the following steps: Step 1: First, determine the connection position of the connecting sleeve (7) according to the length of the steel arch frame (8), then place the bolt holes (15) on the steel arch frame (8) and the bolt holes (15) on the connecting sleeve (7) in the same position, and fix them together with bolts (6) through the steel arch frame (8) and the connecting sleeve (7). Step 2: Then adjust the elastic element, insert one end of the connecting box push body (3) into the slot (2) of the connecting box body (1), and then fix the connecting box push body (3) and the connecting box body (1) with high-strength shear bolts (12); Step 3: Connect and fix the connecting seat plate (14) on the main body (1) of the connecting box to the connecting sleeve (7) of the other one using fixing bolts; Step 4: Then connect and fix the connecting sleeve (7) on the main body (1) of the connecting box to the upper steel arch frame (8) with bolts (6); Step 5: Finally, according to the predetermined release displacement, open the protective cover (11) on the high-strength shear bolt (12), and then fix the main body (1) of the connecting box and the push body (3) of the connecting box through the high-strength shear bolt (12), and close the protective cover (11) to complete the installation.

2. The method of using the adjustable-length graded anti-arching frame connection device according to claim 1, characterized in that: The steel arch frame (8) and the spring support (17) are evenly provided with corresponding bolt holes (15), and the bolt holes (15) correspond to the bolts (6).

3. The method of using the adjustable-length graded anti-arching frame connection device according to claim 1, characterized in that: The main body (1) of the connecting box is uniformly provided with elongated bolt through holes (9), and the elongated bolt through holes (9) are arranged along the length direction of the main body (1). The main body (1) of the connecting box is uniformly provided with concave and convex surfaces (10) near the elongated bolt through holes (9), and an automatically opening protective cover (11) is installed on the outside of the elongated bolt through holes (9).

4. The method of using the adjustable-length graded anti-arching frame connection device according to claim 3, characterized in that: The elongated bolt through hole (9) is provided with a high-strength shear bolt (12) for fixing the connecting box push body (3), and a pad (13) is provided between the high-strength shear bolt (12) and the connecting box body (1). The pad (13) is located on the opposite side of the concave and convex surfaces (10) of the connecting box body (1).

5. The method of using the adjustable-length graded anti-arching frame connection device according to claim 1, characterized in that: The connecting box pusher (3) is hollow, and the cross-section of the connecting box pusher (3) is a convex structure.

6. The method of using the adjustable-length graded anti-arching frame connection device according to claim 1, characterized in that: When adjusting the elastic element, the position of the adjusting ring (16) on the connecting box push body (3) is moved by the adjusting ring (16), and the spring (5) is moved by the adjusting ring (16). When the adjustment is adjusted to the corresponding position, the adjusting ring (16) is fixed on the outside of the connecting box push body (3).

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