Adjustable supporting structure and system for large-span multi-arch tunnel

Abstract

The embodiment of the utility model provides an adjustable supporting structure and system for a large-span multi-arch tunnel, and relates to the technical field of tunnel construction. The utility model discloses an adjustable supporting structure for a large-span multi-arch tunnel. The adjustable supporting structure comprises a supporting frame, abutting plates, an adjusting piece and a detecting piece. The abutting plates are arranged on the edge of the supporting frame at intervals. The adjusting piece is arranged on the supporting frame, hinged to the multiple abutting plates and used for driving the abutting plates to be close to or away from the inner wall of the tunnel so that the multiple abutting plates can jointly abut against and support the inner wall of the tunnel, and the adjusting piece can further adjust the abutting force of the abutting plates on the inner wall of the tunnel; the detecting piece is arranged on the adjusting piece and used for detecting the pressure borne by the abutting plate. The utility model provides an adjustable supporting system. The adjustable supporting system comprises a plurality of large-span multi-arch tunnel adjustable supporting structures which are connected through a base and a plurality of connecting rods. The tunnel supporting device has the advantages that the supporting effect on a tunnel is improved, secondary lining cracking, crushing and other diseases are avoided to a certain extent, and the construction safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, specifically, a kind of large span multi-arch tunnel adjustable support structure and system. BACKGROUND

[0002] Multi-arch tunnel is a special tunnel structure form, usually by two or more tunnel body closely adjacent, and by middle wall is connected with each other, form integral force structure (such as Figure 1 As shown). At present, in the construction process of multi-arch tunnel, middle wall construction is usually carried out first, and the main hole on both sides of middle wall is constructed respectively.

[0003] The inventor found in construction that in the construction process of multi-arch tunnel, the second lining cracks, crushing and other diseases often occur in the first hole under the influence of eccentric load, settlement and other factors in the initial support stage of the later hole, which affects construction safety. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of large span multi-arch tunnel adjustable support structure and large span multi-arch tunnel adjustable support system, which can improve the support effect of tunnel, avoid the second lining cracks, crushing and other diseases to a certain extent, and improve construction safety.

[0005] The embodiment of the utility model can be realized as follows:

[0006] In the first aspect, the utility model provides a kind of large span multi-arch tunnel adjustable support structure, comprising:

[0007] Support frame, along tunnel section plane is arranged in tunnel;

[0008] Butt plate, multiple are arranged at the edge of the support frame;

[0009] Adjusting part, it is arranged in the support frame and is hinged with multiple butt plates, for driving the butt plate close to or away from tunnel inner wall, so that multiple butt plates are supported and supported tunnel inner wall, the adjusting part can also adjust the butt force of butt plate on tunnel inner wall;

[0010] Detection part, it is arranged in the adjusting part, for detecting the pressure of butt plate;

[0011] Wherein, the adjusting part is used to adjust the butt force of butt plate on tunnel inner wall when the detection part detects the pressure change of tunnel inner wall.

[0012] In optional implementation, the side surface of the butt plate away from the support frame is set as arc shape matched with tunnel inner wall.

[0013] In an optional embodiment, the abutment plate surface is covered with a high-damping material layer.

[0014] In an optional embodiment, the adjusting member comprises a hydraulic rod, one end of the hydraulic rod being hinged to the support frame and the other end of the hydraulic rod being hinged to the abutment plate.

[0015] In an optional embodiment, the detecting member is a pressure sensor for detecting the pressure received by the abutment plate.

[0016] In a second aspect, the utility model provides a long-span multiple-arch tunnel adjustable support system, comprising a connecting rod, a base and a plurality of long-span multiple-arch tunnel adjustable support structures according to any one of the preceding embodiments, the plurality of adjustable support structures being arranged on the base and connected by the connecting rod.

[0017] In an optional embodiment, the base bottom is provided with a mobile wheel.

[0018] In an optional embodiment, the base bottom is provided with a temporary support leg, and the temporary support leg is arranged in a telescopic manner.

[0019] The long-span multiple-arch tunnel adjustable support structure and the long-span multiple-arch tunnel adjustable support system have the following beneficial effects:

[0020] By arranging a plurality of abutment plates on the support frame and driving the plurality of abutment plates to abut against the tunnel inner wall through the adjusting member, the tunnel is supported and reinforced by the support frame and the abutment plates. When the tunnel has diseases such as settlement cracking, the detecting member detects the change in the pressure received by the abutment plate, and the adjusting member adjusts the abutting force of the corresponding abutment plate, thereby achieving stable support of the tunnel inner wall. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 The cross-sectional view of the multiple-arch tunnel is provided for the embodiment;

[0023] Figure 2 The front view of the long-span multiple-arch tunnel adjustable support structure is provided for the embodiment;

[0024] Figure 3 The top view of the long-span multiple-arch tunnel adjustable support system is provided for the embodiment;

[0025] Figure 4 This is a side view of the adjustable support system for a large-span arch tunnel provided in this embodiment.

[0026] Icons: 100-Adjustable support structure; 110-Support frame; 120-Abutment plate; 130-Adjusting component; 131-Hydraulic rod; 140-Detection component; 141-Pressure sensor; 200-Adjustable support system; 210-Connecting rod; 220-Base; 230-Moving wheel; 240-Temporary support leg. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0033] Please refer to Figure 1A twin-arch tunnel is a special type of tunnel structure, typically consisting of two or more closely adjacent tunnel sections connected by a central wall to form a unified load-bearing structure. Currently, in the construction of twin-arch tunnels, the central wall is usually constructed first, followed by the main tunnels on either side of the central wall. During the construction of a twin-arch tunnel, the subsequent tunnel construction exerts eccentric pressure on the preceding tunnel, and blasting disturbances during construction also frequently cause secondary lining cracking and crushing in the preceding tunnel, affecting construction safety.

[0034] The following detailed description of the overall structure, working principle, and technical effects of the adjustable support structure and system for span-connected arch tunnels provided by this utility model, through embodiments and in conjunction with the accompanying drawings, is a practical example.

[0035] Please refer to Figure 2 This utility model provides an adjustable support structure for large-span continuous arch tunnels, applicable to the construction of such tunnels. This adjustable support structure 100 can be used in the pilot tunnel to support it, preventing interference during the construction of the subsequent tunnel and avoiding problems such as secondary lining cracking and collapse. In other embodiments, the adjustable support structure 100 can also be used in the subsequent tunnel to support its initial support, improving the structural stability of the subsequent tunnel.

[0036] The adjustable support structure 100 for a large-span continuous arch tunnel provided by this utility model includes a support frame 110, abutment plates 120, an adjusting member 130, and a detection member 140. The support frame 110 is arranged along the cross-sectional plane of the tunnel. Multiple abutment plates 120 are arranged on the support frame 110, and the multiple abutment plates 120 are spaced apart along the edge of the support frame 110. The adjusting member 130 is arranged on the support frame 110 and hinged to the abutment plates 120. The adjusting member 130 can drive the abutment plates 120 to move closer to or away from the inner wall of the tunnel, so that multiple abutment plates 120 together abut against the inner wall of the tunnel. At the same time, after multiple abutment plates 120 abut against the inner wall of the tunnel, the adjusting member 130 can also adjust the abutment force of the abutment plates 120 on the inner wall of the tunnel. The detection element 140 is installed on the adjusting element 130. The detection element 140 can detect the pressure on the abutment plate 120. When the abutment plate 120 is pressed against the inner wall, the abutment plate 120 is subjected to initial pressure. When the tunnel experiences settlement or other conditions, the pressure on the abutment plates 120 at different positions will change. After the detection element 140 detects the change in the pressure on the abutment plate 120, the adjusting element 130 adjusts the bearing force of different abutment plates 120 on the inner wall of the tunnel to balance the pressure on the inner wall of the tunnel and achieve stable support for the inner wall of the tunnel.

[0037] By installing multiple abutment plates 120 on the support frame 110 and driving the multiple abutment plates 120 to abut against the tunnel inner wall through the adjusting component 130, the tunnel is supported and reinforced by the support frame 110 and the abutment plates 120. When the tunnel experiences settlement, cracking, or other defects, the detection component 140 detects changes in the pressure on the abutment plates 120. At this time, the adjusting component 130 adjusts the bearing force of the corresponding abutment plates 120, thereby achieving stable support for the tunnel inner wall.

[0038] In this embodiment, the support frame 110 is a high-strength fixed portal steel frame. The vertical column section of the support frame 110 uses 500mm hollow steel columns, and the horizontal connecting section uses No. 20 I-beams. Furthermore, to facilitate the abutment plates 120 against the tunnel wall, a frame supported by No. 12 I-beams is also installed on the support frame 110, and some of the abutment plates 120 are installed onto the frame. In other embodiments, the support frame 110 can also be configured as an arched frame, in which case multiple abutment plates 120 are spaced apart and installed on the arched frame of the support frame 110.

[0039] Please refer to Figure 1 To provide stable support for the tunnel inner wall, the abutment plate 120 is made of a 1.2cm thick steel plate. The surface of the abutment plate 120 facing away from the support frame 110 is curved, adapting to the tunnel inner wall, thus ensuring full contact between the abutment plate 120 and the tunnel inner wall, resulting in good support. Furthermore, the surface of the abutment plate 120 is covered with a 3cm-5cm layer of high-damping material; in this embodiment, the high-damping material is a rubber sheet. By covering the abutment plate 120 with high-damping material, the frictional resistance between the abutment plate 120 and the tunnel inner wall is increased, further enhancing the support effect of the abutment plate 120 on the tunnel inner wall.

[0040] Please refer to Figure 1In this embodiment, the adjusting member 130 includes a hydraulic rod 131. The cylinder of the hydraulic rod 131 is hinged to the support frame 110, and the piston rod end of the hydraulic rod 131 is hinged to the abutment plate 120. By hinged the hydraulic rod 131 to the support frame 110 and the abutment plate 120 to the piston rod, the pressure on the abutment plate 120 is always transmitted along the hydraulic rod 131, which avoids stress concentration to a certain extent and improves the overall structural stability of the adjustable support structure 100. In other embodiments, the adjusting member 130 can also be a cylinder, electric cylinder, or other structure that can drive the abutment plate 120 to move and adjust the pressure of the abutment plate 120. In some alternative embodiments, the detection element 140 is a pressure sensor 141, which is used to detect the pressure on the abutment plate 120. In actual construction, the detection element 140 also includes a controller that is electrically connected to both the pressure sensor 141 and the adjusting element 130. When the pressure sensor 141 detects a change in the pressure on the abutment plate 120, the controller controls the adjusting element 130 to adjust the bearing force of the abutment plate 120 against the inner wall of the tunnel.

[0041] On the other hand, please refer to Figures 3-4 This utility model also discloses an adjustable support system 200 for a large-span continuous arch tunnel. The adjustable support system 200 includes a connecting rod 210, a base 220, and multiple aforementioned adjustable support structures 100. In this embodiment, the adjustable support system 200 includes three adjustable support structures 100, all of which are mounted on the base 220 and connected by the connecting rod 210. The base 220 is made of No. 40 I-beam, the connecting rod 210 is made of No. 20 I-beam, and the spacing between adjacent support frames 110 is 1500 cm. In other embodiments, the number of adjustable support structures 100 in the adjustable support system 200 can be adaptively selected according to construction needs.

[0042] By combining multiple adjustable support mechanisms for large-span continuous arch tunnels into an adjustable support system 200 for large-span continuous arch tunnels, the support area for the tunnel inner wall is increased, thereby improving the support effect on the tunnel inner wall.

[0043] For further details, please refer to Figures 3-4To facilitate the movement of the adjustable support system 200 for the large-span arch tunnel, multiple casters 230 are provided at the bottom of the base 220 to drive the system within the tunnel. To further control the direction of movement of the system 200, guide rails adapted to the casters 230 can be installed along the tunnel length at the bottom of the tunnel. In this embodiment, a temporary support leg 240 is also provided at the bottom of the base 220. The temporary support leg 240 is extendable via a cylinder, hydraulic cylinder, or electric cylinder, allowing it to be adjusted to rest against the tunnel floor when the system is in the support position, thus providing support and improving the support effect. When the adjustable support system 200 for the large-span continuous arch tunnel is moved, the temporary support leg 240 is adjusted to disengage from the bottom of the tunnel so as to facilitate the movement of the adjustable support system 200 for the large-span continuous arch tunnel.

[0044] In summary, the implementation principle of the adjustable support structure 100 and system for a large-span continuous arch tunnel provided by this utility model is as follows: multiple abutment plates 120 are set on the support frame 110, and the multiple abutment plates 120 are driven to abut against the inner wall of the tunnel by the adjusting component 130, thereby supporting and reinforcing the tunnel through the support frame 110 and the abutment plates 120. When the tunnel experiences settlement, cracking, or other defects, the detection component 140 detects a change in the pressure on the abutment plates 120. At this time, the adjusting component 130 adjusts the bearing force of the corresponding abutment plates 120, thereby achieving stable support for the inner wall of the tunnel.

[0045] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable support structure for a large-span continuous arch tunnel, characterized in that, include: The support frame is installed inside the tunnel along the cross-sectional plane of the tunnel. Multiple abutment plates are spaced apart along the edge of the support frame; An adjusting member is disposed on the support frame and hinged to the multiple abutment plates, for driving the abutment plates closer to or further away from the tunnel inner wall, so that the multiple abutment plates together abut against and support the tunnel inner wall. The adjusting member can also adjust the abutment force of the abutment plates on the tunnel inner wall. A detection element is disposed on the adjusting element to detect the pressure on the abutment plate; The adjusting member is used to adjust the bearing force of the abutment plate on the tunnel inner wall when the detection member detects a pressure change in the tunnel inner wall.

2. The adjustable support structure for a long-span continuous arch tunnel according to claim 1, characterized in that, The surface of the abutment plate opposite to the support frame is configured as an arc shape to fit the inner wall of the tunnel.

3. The adjustable support structure for a long-span continuous arch tunnel according to claim 1, characterized in that, The surface of the abutment plate is covered with a high-damping material layer.

4. The adjustable support structure for a long-span continuous arch tunnel according to claim 1, characterized in that, The adjusting component includes a hydraulic rod, one end of which is hinged to the support frame and the other end of which is hinged to the abutment plate.

5. The adjustable support structure for a long-span continuous arch tunnel according to any one of claims 1-4, characterized in that, The detection element is a pressure sensor used to detect the pressure applied to the abutment plate.

6. An adjustable support system for long-span continuous arch tunnels, characterized in that: It includes a connecting rod, a base, and multiple adjustable support structures for a large-span continuous arch tunnel as described in any one of claims 1-5, wherein the multiple adjustable support structures are disposed on the base and connected by the connecting rod.

7. The adjustable support system for a long-span continuous arch tunnel according to claim 6, characterized in that, The base is equipped with casters.

8. The adjustable support system for a long-span continuous arch tunnel according to claim 6, characterized in that, The base is provided with a temporary support leg at its bottom, and the temporary support leg is retractable.

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