Reinforcing structure for primary support of tunnel body

Abstract

The utility model provides a reinforcing structure for primary support of a tunnel body, which comprises two groups of symmetrical supports, a screw rod is fixedly arranged on each support, the two screw rods are in threaded connection with an adjusting arm, the axes of the two screw rods are overlapped, and the screwing directions of the threads are opposite; the adjusting arm is used for adjusting the relative distance between the two supports. The supporting device comprises a supporting arm arranged at the bottom of any support and an extending arm arranged at the bottom of the other support, the extending arm is arranged in the supporting arm in a sliding mode through a limiting piece, and the supporting arm and the extending arm are used for supporting the bottoms of the two supports; the cross section of the bottom plate is triangular, and the bottom plate covers the supporting device; the two supports are controlled to be close to or far away from each other by rotating the adjusting arm, tunnels with different widths are supported, the extending arm and the supporting arm abut against the ground, the adjusting arm is located in the upper portion of the support, the vertical distance between the extending arm and the adjusting arm and the vertical distance between the supporting arm and the adjusting arm are long, a passage for people to pass is formed, and interference on construction in the supporting process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a reinforcement structure for the initial support of a tunnel body. Background Technique

[0002] After the tunnel is excavated, in order to control the release and deformation of the surrounding rock stress, increase the structural safety factor and facilitate construction, the initial support is usually carried out immediately.

[0003] For example, the Chinese utility model with the publication number CN212479267U discloses "a reinforcement structure for the initial support of a tunnel body". This device reinforces the bottom of the initial support of the tunnel body by respectively arranging an I-beam support unit at the lower parts on both sides of the initial support of the tunnel body, and can prevent the vibration generated during the construction of the impact drill from disturbing the initial support of the already constructed tunnel body during the construction of the pile foundation supporting beam, thereby avoiding the phenomenon that the initial support of the tunnel body cracks or deforms.

[0004] However, during the initial support process, bolts or direct welding are generally used to build the support structure, which has cumbersome steps, is time-consuming and laborious. During the support process, the tunnel is under simultaneous construction, and the traditional support structure will interfere with the construction during the support process, affecting the construction progress. Summary of the Utility Model

[0005] Aiming at the deficiencies in the prior art, the utility model provides a reinforcement structure for the initial support of a tunnel body, which solves the problems in the prior art that when building the traditional support structure, bolts or direct welding are generally used, the steps are cumbersome, time-consuming and laborious, and it will interfere with the construction during the support process, affecting the construction progress.

[0006] According to an embodiment of the utility model, a reinforcement structure for the initial support of a tunnel body includes brackets, which are two groups and symmetrical. A screw rod is fixedly arranged on each bracket, and the two screw rods are both threadedly connected to the adjusting arm. Among them, the axes of the two screw rods overlap, and the thread directions are opposite; the adjusting arm is used to adjust the relative distance between the two brackets; a supporting device, including a supporting arm arranged at the bottom of any one bracket and an extending arm at the bottom of the other bracket, the extending arm is slidably arranged in the supporting arm through a limiting member, and the supporting arm and the extending arm are used to support the bottoms of the two brackets; a bottom plate, whose cross-section is triangular, covers the supporting device.

[0007] Compared with the prior art, the utility model has the following beneficial effects: by rotating the adjusting arm to control the two brackets to approach or move away from each other, the tunnel body with different widths is supported. The upper part of the bracket is supported by the adjusting arm, and the lower part of the bracket is supported by the extension arm and the support arm, reducing the disturbance and deformation of the tunnel body during the construction process. At the same time, the extension arm and the support arm are in contact with the ground, and the adjusting arm is in the upper part area of the bracket. The vertical distance from the extension arm and the support arm to the adjusting arm is relatively far, forming a passage that allows people to pass through, avoiding interference with the construction during the support process and affecting the construction progress. The bottom plate covers the extension arm and the support arm in contact with the ground, preventing the extension arm and the support arm from protruding above the ground and blocking the trolley or tripping people.

[0008] Preferably, a storage groove is formed on the support arm, the extension arm is located in the storage groove and can slide. Among them, multiple groups of through holes are formed in both the extension arm and the storage groove, and the limiting member is inserted into the corresponding through holes.

[0009] Preferably, the limiting member includes a mounting strip, a sliding groove is formed on the mounting strip, and at least one insertion pin is slidably arranged in the sliding groove, and the insertion pin is inserted into the through hole.

[0010] Preferably, multiple groups of tripod brackets are evenly distributed on the bottom side of the bottom plate, and the multiple groups of tripod brackets correspond to each other and form a passage, and the passage is clamped on the support arm.

[0011] Preferably, a limiting groove is formed on each bracket, and a support frame is clamped at the limiting groove.

[0012] Preferably, an expansion plate is detachably arranged on each bracket.

[0013] Preferably, an installation groove is formed on each expansion plate, and the installation groove is clamped on the corresponding bracket. Description of the Drawings

[0014] Figure 1 It is a schematic three-dimensional structure diagram of an embodiment of the utility model.

[0015] Figure 2 It is an exploded structure diagram of an embodiment of the utility model.

[0016] Figure 3 It is a schematic structure diagram of the limiting member in an embodiment of the utility model.

[0017] Figure 4 It is a schematic structure diagram of the bottom plate in an embodiment of the utility model.

[0018] Figure 5 It is a left view of an embodiment of the utility model.

[0019] In the above-mentioned drawings: 1. Bracket; 101. Screw; 102. Adjusting arm; 103. Support frame; 104. Limit groove; 2. Expanding plate; 201. Installation groove; 3. Bottom plate; 301. Channel; 302. Tripod; 4. Support arm; 401. Storage groove; 5. Extension arm; 501. Through hole; 6. Installation strip; 601. Plug; 602. Slide groove. Detailed implementation manners

[0020] The technical solutions in the present utility model will be further described below with reference to the drawings and embodiments.

[0021] As Figures 1 to 5 shown, an embodiment of the present utility model provides a reinforcement structure for the initial support of a tunnel body, which includes brackets 1, two groups and symmetrically arranged. A screw 101 is fixedly arranged on each bracket 1, and the two screws 101 are both threadedly connected to the adjusting arm 102. Among them, the axes of the two screws 101 overlap, and the thread directions are opposite; the adjusting arm 102 is used to adjust the relative distance between the two brackets 1; a support device, including a support arm 4 arranged at the bottom of any one bracket 1 and an extension arm 5 at the bottom of the other bracket 1, the extension arm 5 is slidably arranged in the support arm 4 through a limiting member, and the support arm 4 and the extension arm 5 are used to support the bottoms of the two brackets 1; a bottom plate 3, whose cross-section is triangular and covers the support device.

[0022] The detailed working process of this embodiment is as follows: By rotating the adjusting arm 102, the two brackets 1 are controlled to approach or move away from each other to support tunnel bodies with different widths. The adjusting arm 102 supports the upper part of the bracket 1, and the extension arm 5 and the support arm 4 support the lower part of the bracket 1, reducing the disturbance and deformation of the tunnel body during the construction process. At the same time, the extension arm 5 and the support arm 4 are in contact with the ground, and the adjusting arm 102 is in the upper part area of the bracket 1. The vertical distances from the extension arm 5 and the support arm 4 to the adjusting arm 102 are relatively far, forming a passage that allows people to pass through, avoiding interference with the construction during the support process and affecting the construction progress. The bottom plate 3 covers the extension arm 5 and the support arm 4 in contact with the ground, preventing the extension arm 5 and the support arm 4 from protruding from the ground and blocking the trolley or tripping people.

[0023] As Figure 2 shown in Figure 3 figures, a storage groove 401 is opened on the support arm 4, the extension arm 5 is located in the storage groove 401 and can slide. Among them, multiple groups of through holes 501 are opened in both the extension arm 5 and the storage groove 401, and the limiting member is inserted into the corresponding through holes 501.

[0024] The detailed working process of this embodiment is as follows: The support arm 4 and the extension arm 5 are fixedly arranged at the bottom ends of each support 1. The extension arm 5 is slidable within the support arm 4. At the same time, a plurality of groups of through holes 501 corresponding in number are provided on the support arm 4 and the extension arm 5. When adjusting the relative distance between the two supports 1, the extension arm 5 moves within the support arm 4. After the two supports 1 are adjusted to the appropriate positions for support, a limiting member is inserted into the overlapping through holes 501 of the support arm 4 and the extension arm 5 to limit them. At this time, the support 1 can effectively support the tunnel.

[0025] As Figure 3 shown, the limiting member includes an installation strip 6. A sliding groove 602 is provided on the installation strip 6. At least one inserting pin 601 is slidably arranged within the sliding groove 602. The inserting pin 601 is inserted into the through hole 501.

[0026] The detailed working process of this embodiment is as follows: When there are more overlapping through holes 501 of the support arm 4 and the extension arm 5, and more inserting pins 601 are inserted, the support is more stable. The plurality of inserting pins 601 are slidable within the installation strip 6, facilitating the adjustment of the positions of the plurality of inserting pins 601 and the corresponding overlapping through holes 501, so that the inserting pins 601 on the installation strip 6 can be inserted into the overlapping through holes 501.

[0027] As Figure 4 With Figure 5 shown, a plurality of groups of tripod supports 302 are evenly distributed on the bottom side of the bottom plate 3, and the plurality of groups of tripod supports 302 correspond to each other and form a channel 301. The channel 301 is clamped on the support arm 4.

[0028] The detailed working process of this embodiment is as follows: The function of the tripod support 302 is to support the bottom plate 3, improve the strength of the bottom plate 3, and prevent the bottom plate 3 from deforming after being pressed by heavy objects such as trolleys. The tripod supports 302 are arranged on both sides of the bottom of the bottom plate 3 and correspond to each other. A channel 301 is formed between the two tripod supports 302 on both sides. The width of the channel 301 is the same as the cross-sectional width of the support arm 4, so that the bottom plate 3 is just clamped on the support arm 4 through the channel 301, preventing the tripod supports 302 from being displaced under stress.

[0029] As Figure 2 shown, a limiting groove 104 is provided on each support 1, and a support frame 103 is clamped at the limiting groove 104.

[0030] The detailed working process of this embodiment is as follows: The function of the support frame 103 is to support the support 1 and prevent the support 1 from tipping over. When installing the support frame 103, the support frame 103 can be directly clamped at the limiting groove 104 of the support 1.

[0031] As Figure 2 shown, an expansion plate 2 is detachably arranged on each support 1.

[0032] As Figure 2As shown, each expansion plate 2 is provided with an installation groove 201, and the installation groove 201 is clamped on the corresponding bracket 1.

[0033] The detailed working process of this embodiment is as follows: The function of the expansion plate 2 is to increase the contact surface with the tunnel during support and improve the support force-bearing area. During installation, the limit groove 104 of the expansion plate 2 can be directly clamped on the bracket 1.

[0034] The implementation principle of this application embodiment is as follows: First, directly clamp the limit groove 104 of the expansion plate 2 on the bracket 1, and then control the two brackets 1 to approach or move away from each other by rotating the adjusting arm 102 to support tunnel bodies with different widths. Rotate the adjusting arm 102 until the expansion plate 2 contacts and abuts against the inner wall of the tunnel, then insert the plug 601 into the overlapping through holes 501, and finally clamp the channel 301 of the bottom plate 3 on the support arm 4 to complete the initial support of the tunnel body.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A reinforcement structure for initial support of a tunnel body, characterized in that: include: The brackets (1) are in two symmetrical groups, each bracket (1) is fixedly provided with a screw rod (101), and the two screw rods (101) are both threadedly connected to an adjustment arm (102), wherein the axes of the two screw rods (101) overlap and the thread rotation directions are opposite; the adjustment arm (102) is used to adjust the relative distance between the two brackets (1); A supporting device, comprising a supporting arm (4) arranged at the bottom of any one bracket (1) and an extending arm (5) at the bottom of the other bracket (1), wherein the extending arm (5) is slidably arranged in the supporting arm (4) via a limiting member, and the supporting arm (4) and the extending arm (5) are used to support the bottoms of the two brackets (1); The bottom plate (3) has a triangular cross section and is arranged on the supporting device.

2. The reinforcement structure for initial support of a tunnel body according to claim 1 is characterized in that: The support arm (4) is provided with a receiving groove (401), and the extension arm (5) is located in the receiving groove (401) and is slidable, wherein the extension arm (5) and the receiving groove (401) are both provided with a plurality of groups of through holes (501), and the limiting member is inserted into the corresponding through holes (501).

3. The reinforcement structure for initial support of a tunnel body according to claim 2 is characterized in that: The limiting member comprises a mounting bar (6), a sliding groove (602) is provided on the mounting bar (6), at least one inserting pin (601) is slidably arranged in the sliding groove (602), and the inserting pin (601) is inserted into the through hole (501).

4. The reinforcement structure for initial support of a tunnel body according to claim 1, characterized in that: A plurality of groups of tripods (302) are evenly distributed on the bottom side of the bottom plate (3), and the plurality of groups of tripods (302) correspond to each other and form a channel (301), and the channel (301) is clamped on the support arm (4).

5. The reinforcement structure for initial support of a tunnel body according to claim 1, characterized in that: Each of the brackets (1) is provided with a limiting groove (104), and a supporting frame (103) is clamped at the limiting groove (104).

6. The reinforcement structure for initial support of a tunnel body according to claim 1, characterized in that: Each of the brackets (1) is provided with a detachable expansion plate (2).

7. The reinforcement structure for initial support of a tunnel body according to claim 6, characterized in that: Each expansion plate (2) is provided with a mounting groove (201), and the mounting groove (201) is clamped on the corresponding bracket (1).

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