Supporting and reinforcing device for top of tunnel
By designing arc-shaped support frames and sliding rod structures on the top of the tunnel, the problems of gravel falling and the pressure on the support structure during construction are solved, and better support effect and stability are achieved.
Patent Information
- Application Number
- CN202421218397.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
During the tunnel construction process, equipment vibration causes gravel on the top of the tunnel to fall, and the support structure is prone to bend or break after being pressed, affecting the support effect.
A support reinforcement device including arc-shaped support frame, slide, inclined fixing rod and pushing plate is designed. Using the cooperation of sliding rod and pushing plate, the contact area and stress point between the support frame and the tunnel are increased, the pressure is dispersed, and the pressure is enhanced. Support effect.
It effectively reduces the accumulation of gravel and deformation of the support structure, improves the support effect on the top of the tunnel, enhances the stability and durability of the support frame, and prevents breakage.
Smart Images
Figure CN222315167U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tunnel support, and more specifically, to a support and reinforcement device for a tunnel top. Background Art
[0002] During the tunnel excavation process, a support structure will be set up on the inner wall of the tunnel to support the tunnel and reduce the possibility of tunnel collapse.
[0003] A common support structure is against the inner wall of the tunnel and its top and bottom surfaces are fixed respectively, so as to reduce the displacement of the support structure. However, during the tunnel construction process, the vibration of the equipment during operation will cause some gravel on the top surface of the tunnel to fall on the top surface of the support structure. As the pressure on the support structure increases, the support structure will bend or even break, thereby affecting the support effect. Therefore, a structure is set to solve the problem of poor support effect of some tunnel support devices. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a support reinforcement device for the top of a tunnel, which can improve the overall support effect of the support frame through structural settings.
[0005] The above technical purpose of the utility model is achieved through the following technical scheme: a support and reinforcement device for the top of a tunnel, comprising a support frame with an arc-shaped cross-section, a slideway smaller than the width of the support frame is provided on the outer peripheral wall of the support frame, and the end of the slideway close to the ground is slidably connected to a plurality of obliquely arranged fixing rods, and the side of the fixing rod away from the inner wall of the slideway is fixedly connected to a push plate, and when the weight of the push plate increases, the fixing rod slides toward the direction close to the tunnel and extends into the tunnel.
[0006] The utility model is further configured as follows: the fixed rod includes a connecting rod and a sliding rod slidably connected inside the connecting rod, the end of the connecting rod away from the sliding rod is fixedly connected to the inner wall of the support frame, and the cross-sectional area of the end of the sliding rod away from the connecting rod is smaller than the cross-sectional area of the end close to the connecting rod.
[0007] The utility model is further configured as follows: the distance between the sliding rod and the top surface of the support frame is smaller than the distance between the connecting rod and the top surface of the support frame, a receiving groove equal to the length of the sliding rod is provided in the connecting rod, and the weight of the pushing plate is inversely proportional to the distance between the end of the connecting rod away from the support frame and the tunnel.
[0008] The utility model is further configured as follows: a slide groove is provided on one side of the connecting rod close to the top surface of the support frame, the pushing plate is fixedly connected to the sliding rod and is located in the slide groove, and both ends of the pushing plate are against the inner wall of the slideway.
[0009] The utility model is further configured as follows: a pulling piece is fixedly connected to the inner top surface of the accommodating groove, and one end of the pulling piece away from the supporting frame is fixedly connected to the sliding rod.
[0010] The utility model is further configured as follows: a through slot is provided along the thickness direction of the support frame for the connecting rod to pass through, the through slot has the same inclination angle as the connecting rod, and the cross-sectional area of one end of the connecting rod away from the sliding rod is larger than the cross-sectional area of the through slot.
[0011] The utility model is further configured as follows: the sliding rod is made of titanium alloy steel.
[0012] In summary, the utility model has the following beneficial effects: some gravel will fall from the top surface of the tunnel during the construction process, and the fallen gravel will slide along the slideway under the action of its own gravity and fall on the pushing plate. In the initial state, the connecting rod is against the inner wall of the tunnel, and the connecting rod is used to strengthen the supporting effect of the support frame. When the weight of the gravel on the pushing plate increases, the pushing plate will drive the sliding rod to move toward the tunnel until the sliding rod extends into the tunnel, and the sliding rod is used to increase the supporting effect of the support frame, and the sliding rod can better disperse the pressure on the support frame, thereby strengthening the supporting effect of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] Figure 2 It is a cross-sectional view of the utility model;
[0015] Figure 3 for Figure 2 Enlarged view of part A in the middle.
[0016] In the figure: 1, support frame; 2, slideway; 3, push plate; 4, connecting rod; 5, sliding rod; 6, receiving groove; 7, slide groove; 8, pulling piece; 9, through groove. DETAILED DESCRIPTION
[0017] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] A tunnel top support reinforcement device, such as Figure 1 and Figure 2As shown, it includes a support frame 1 with an arc-shaped cross-section. The cross-sectional shape of the support frame 1 is set so that it can better fit the tunnel top surface, thereby ensuring its supporting effect on the tunnel. A slideway 2 smaller than the width of the support frame 1 is provided on the outer peripheral wall of the support frame 1. The setting of the slideway 2 provides a storage space for gravel falling from the tunnel top surface. Since the cross-sectional shape of the slideway 2 is the same as that of the support frame 1, the gravel falling into the slideway 2 can slide along the slideway 2 toward the ground. On the one hand, it is convenient for people to clean up the gravel, and on the other hand, it reduces the situation where a large amount of gravel accumulates on the top surface of the support frame 1, causing the support frame 1 to deform and affect the supporting effect.
[0019] like Figure 1 and Figure 2 As shown, one end of the slide 2 close to the ground is slidably connected to a plurality of obliquely arranged fixing rods, and adjacent fixing rods are symmetrically arranged along the central axis of the support frame 1 in the height direction, thereby ensuring uniform force on the support frame 1, and the obliquely arranged fixing rods can better adapt to the cross-sectional shape of the support frame 1, making the process of extending the fixing rods into the tunnel more labor-saving, and a pushing plate 3 is fixedly connected to the side of the fixing rod away from the inner wall of the slide 2. When the weight of the pushing plate 3 increases, the fixing rod slides toward the tunnel and extends into the tunnel. When the weight of the gravel falling on the pushing plate 3 increases, the pushing plate 3 will drive the fixing rod to extend into the tunnel. The fixing rods extending into the tunnel can increase the contact area between the support frame 1 and the tunnel and the pressure on the support frame 1 can be better dispersed through the fixing rods, thereby further enhancing the supporting effect of the support frame 1.
[0020] like Figure 1-Figure 3 As shown, the fixed rod includes a connecting rod 4 and a sliding rod 5 slidably connected to the inside of the connecting rod 4. The sliding rod 5 is made of titanium alloy steel. The good hardness of titanium alloy steel is utilized to enable the sliding rod 5 to stably extend into the tunnel. A through groove 9 is provided along the thickness direction of the support frame 1 for the connecting rod 4 to pass through. The through groove 9 has the same inclination angle as the connecting rod 4. The setting of the through groove 9 limits the sliding direction of the connecting rod 4 and the sliding rod 5 on the support frame 1, and the connecting rod 4 is abutted against the inner wall of the through groove 9, thereby reducing the displacement of the connecting rod 4 on the support frame 1. The cross-sectional area of the end of the connecting rod 4 away from the sliding rod 5 is larger than the cross-sectional area of the through groove 9, and the end of the connecting rod 4 away from the tunnel is fixed to the inner wall of the support frame 1 by bolts, thereby ensuring the stable fixation of the structure.
[0021] like Figure 1 and Figure 3 As shown, the cross-sectional area of the end of the sliding rod 5 away from the connecting rod 4 is smaller than the cross-sectional area of the end close to the connecting rod 4, thereby reducing the force-bearing area of the sliding rod 5 and increasing its pressure on the tunnel surface, so that the sliding rod 5 can more easily penetrate into the tunnel.
[0022] like Figure 1 and Figure 3 As shown, the distance between the sliding rod 5 and the top surface of the support frame 1 is smaller than the distance between the connecting rod 4 and the top surface of the support frame 1, and the connecting rod 4 is slidably connected in the sliding rod 5, and the central axis of the connecting rod 4 in the length direction coincides with the central axis of the sliding rod 5 in the length direction, thereby determining the inclination direction of the sliding rod 5 and the connecting rod 4, ensuring that the sliding rod 5 can better penetrate into the tunnel under the drive of the pushing plate 3, and during the use of the support frame 1, its force point is concentrated on the side close to the ground. Therefore, when gravel continues to fall on the pushing plate 3, the sliding rod 5 will continue to move in the direction close to the ground, reducing the situation where the sliding rod 5 slips out of the tunnel when the tunnel vibrates, and after the sliding rod 5 extends into the tunnel, it will continue to apply tension to the support frame 1 so that it always fits with the tunnel surface, thereby enhancing the supporting effect of the support frame 1 on the tunnel.
[0023] like Figure 1 and Figure 3 As shown, a receiving groove 6 with the same length as the sliding rod 5 is opened in the connecting rod 4. The setting of the receiving groove 6 provides a receiving function for the sliding rod 5, thereby reducing the situation in which the sliding rod 5 passes through the connecting rod 4 in the initial state and affects the installation of the support frame 1. In the initial state, the end of the connecting rod 4 away from the support frame 1 is against the tunnel, and the cross-sectional area of the end of the connecting rod 4 away from the sliding rod 5 is larger, which increases the force-bearing area of the support frame 1. Therefore, when it is against the inner wall of the tunnel, the connecting rod 4 can provide a stable supporting force to the support frame 1, thereby reducing the situation in which the support frame 1 breaks after being subjected to the pressure exerted on it by the tunnel for a long time, thereby ensuring the durability of the structure.
[0024] like Figure 1 and Figure 3 As shown, a pulling piece 8 is bonded to the inner top surface of the accommodating groove 6, and the pulling piece 8 is set as a spring. The end of the pulling piece 8 away from the supporting frame 1 is bonded to the sliding rod 5. In the initial state, the sliding rod 5 is accommodated in the connecting rod 4 and exerts pressure on the pulling piece 8 to make it in a compressed state. When the sliding rod 5 passes through the connecting rod 4, the sliding rod 5 will exert a tensile force on the pulling piece 8 to make it stretch and deform. The setting of the pulling piece 8 ensures that the connecting rod 4 fixes the sliding rod 5 stably, reduces the possibility of the sliding rod 5 falling out of the connecting rod 4 after being extended into the tunnel, and ensures the stable use of the structure.
[0025] like Figure 1-Figure 3As shown, a slide groove 7 is provided on one side of the connecting rod 4 close to the top surface of the support frame 1, and the slide groove 7 is arranged along the length direction of the connecting rod 4. The pushing plate 3 is bonded to the sliding rod 5 and is located in the slide groove 7. The setting of the slide groove 7 provides a guiding effect for the sliding of the pushing plate 3, so that the pushing plate 3 can stably apply a thrust to the sliding rod 5 to make it move toward the direction close to the tunnel. Both ends of the pushing plate 3 are against the inner wall of the slideway 2, and the inner wall of the slideway 2 provides a supporting effect on the pushing plate 3, so that the pushing plate 3 can slide smoothly after being subjected to the pressure applied by the gravel, reducing the situation where the pushing plate 3 tilts due to the force and causes the gravel to slide off the pushing plate 3, ensuring that the pushing plate 3 can stably apply a thrust to the sliding rod 5 to make it penetrate into the tunnel.
[0026] Working principle: Place the support frame 1 inside the tunnel so that it is against the inner wall of the tunnel. At this time, the sliding rod 5 is received in the connecting rod 4 and the connecting rod 4 is against the inner wall of the tunnel. When gravel on the top of the tunnel falls into the slideway 2, the gravel will slide along the slideway 2 toward the ground and fall onto the push plate 3. As the amount of gravel on the push plate 3 increases, the push plate 3 will move toward the ground and apply a thrust to the sliding rod 5 to make it slide toward the inner wall of the tunnel until it penetrates into the tunnel, thereby enhancing the support effect of the support frame 1 on the tunnel.
[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A tunnel top support reinforcement device, comprising a support frame (1) having an arc-shaped cross-section, characterized in that: A slideway (2) smaller than the width of the support frame (1) is provided on the outer peripheral wall of the support frame (1); one end of the slideway (2) close to the ground is slidably connected to a plurality of obliquely arranged fixing rods; a side of the fixing rod away from the inner wall of the slideway (2) is fixedly connected to a push plate (3); when the weight of the pushing plate (3) increases, the fixing rod slides in a direction close to the tunnel and extends into the tunnel.
2. A tunnel top support and reinforcement device according to claim 1, characterized in that: The fixed rod comprises a connecting rod (4) and a sliding rod (5) slidably connected inside the connecting rod (4); one end of the connecting rod (4) away from the sliding rod (5) is fixedly connected to the inner wall of the support frame (1); and the cross-sectional area of the end of the sliding rod (5) away from the connecting rod (4) is smaller than the cross-sectional area of the end close to the connecting rod (4).
3. A tunnel top support and reinforcement device according to claim 2, characterized in that: The distance between the sliding rod (5) and the top surface of the support frame (1) is smaller than the distance between the connecting rod (4) and the top surface of the support frame (1); a receiving groove (6) having the same length as the sliding rod (5) is provided in the connecting rod (4); and the weight of the pushing plate (3) is inversely proportional to the distance between the end of the connecting rod (4) away from the support frame (1) and the tunnel.
4. A tunnel top support and reinforcement device according to claim 2, characterized in that: A slide groove (7) is provided on one side of the connecting rod (4) close to the top surface of the support frame (1); the push plate (3) is fixedly connected to the sliding rod (5) and is located in the slide groove (7); both ends of the push plate (3) are in contact with the inner wall of the slideway (2).
5. The tunnel top support and reinforcement device according to claim 3, characterized in that: A pulling piece (8) is fixedly connected to the inner top surface of the accommodating groove (6), and one end of the pulling piece (8) away from the supporting frame (1) is fixedly connected to the sliding rod (5).
6. A tunnel top support and reinforcement device according to claim 2, characterized in that: A through slot (9) for the connecting rod (4) to pass through is provided along the thickness direction of the support frame (1); the through slot (9) and the connecting rod (4) have the same inclination angle; and the cross-sectional area of one end of the connecting rod (4) away from the sliding rod (5) is larger than the cross-sectional area of the through slot (9).
7. A tunnel top support and reinforcement device according to claim 2, characterized in that: The sliding rod (5) is made of titanium alloy steel.