Supporting cushion block for tunnel arch frame and arch foot

Abstract

The utility model discloses a kind of support cushion block for tunnel arch frame arch foot, including first cushion block, second cushion block and the adjusting rod for spiral adjustment spacing between the first cushion block and second cushion block being set between first cushion block and second cushion block, adjusting piece for locking adjusting rod is further provided between first cushion block and second cushion block, adjusting piece includes fixed sleeve and guide rod sequentially arranged from outside to inside, adjusting rod is located between fixed sleeve and guide rod, and three concentrically set. The utility model is to solve the problem that traditional steel plate or concrete cushion block thickness is fixed, difficult to adapt to steel arch frame arch foot height adjustment, adjustable design is used, height flexible adjustment is realized by rotating adjusting rod, and stability is ensured by cooperating with limiting piece locking, convenient to install, detachable and reusable, applicable to various geological conditions and different size arch frame, effectively improve construction efficiency and structural safety.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of tunnel engineering construction technology. Specifically, it relates to a support pad for the arch foot of a tunnel arch frame. Background Technology

[0002] The installation of steel arch frames, as the most important load-bearing structure in the initial support of tunnels, is one of the important measures to ensure tunnel safety. During the installation of steel arch frames, in order to compensate for over-excavation during blasting and ensure the elevation of the steel arch frames, multiple steel plates or precast concrete blocks are usually used for support at the arch foot position of the steel arch frames.

[0003] In related technologies, the steel plate or precast concrete pad support method involves installing several steel plates or precast concrete pads at the arch foot position in advance after removing loose debris from the arch foot and completing the measurement and positioning to ensure the elevation of the steel arch frame.

[0004] During construction, steel plates or concrete blocks of varying thicknesses are often used to create supports that meet the required height. However, because the thickness of the steel plates or concrete blocks is fixed, it is difficult to adjust the height of the arch feet of the steel arch frame. This makes the height adjustment process for the arch feet of the tunnel steel arch frame cumbersome, inefficient, and ineffective. Therefore, an adjustable support block for the arch feet of tunnel arch frames is designed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a support pad for the arch foot of a tunnel arch frame.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model discloses a support pad for the arch foot of a tunnel arch frame, including a first pad, a second pad, and an adjusting rod disposed between the first pad and the second pad for spirally adjusting the distance between them;

[0008] An adjusting component for locking the adjusting rod is also provided between the first pad and the second pad. The adjusting component includes a fixed sleeve and a guide rod arranged sequentially from the outside to the inside. The adjusting rod is located between the fixed sleeve and the guide rod, and the three are concentrically arranged.

[0009] Preferably, the fixing sleeve is fixedly connected to the second pad, the bottom of the guide rod is screwed to the second pad, and the adjusting rod is threadedly engaged with the fixing sleeve.

[0010] Preferably, the adjusting rod has a guide groove inside that slides with the guide rod, and the upper outer side of the guide rod has a flange circumferentially provided. The flange is fixed to the upper end of the guide rod, and the cross-section of the guide rod is T-shaped.

[0011] Preferably, a stop block is fixed to the inner side of the bottom of the adjusting rod, and the length of the stop block is adapted to the length of the flange.

[0012] Preferably, the adjusting rod has several limiting holes inside, and the guide rod and the fixing sleeve each have a limiting hole on one side, with a limiting component inside the limiting hole.

[0013] Preferably, the limiting member is a T-shaped screw, which passes through the limiting hole, through the fixing sleeve and the adjusting rod, and is threadedly engaged with the guide rod.

[0014] Preferably, a connecting rod extends laterally between the adjusting rod and the first pad, and a support member is provided between the connecting rod and the second pad.

[0015] Preferably, the supporting member is provided on the lower side of both ends of the connecting rod. The supporting member includes an outer support rod, an inner support rod, and a fixing screw disposed between the outer support rod and the inner support rod for limiting the position.

[0016] Preferably, the upper end of the outer support rod is inserted into the connecting rod, the outer support rod is sleeved on the outside of the inner support rod, the fixing screw passes through the outer support rod and is threaded into the inner support rod, and the upper surface of the second pad has an installation hole adapted to the inner support rod.

[0017] Preferably, the inner support rod has several fixing holes on one side, and the fixing holes on the inner support rod are blind holes. A fixing hole is provided near the bottom of the outer support rod, and the fixing hole on the outer support rod is a through hole.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] To address the problem of fixed thickness in traditional steel plates or concrete blocks, which makes it difficult to adapt to adjustments in the arch height of steel arch frames, this invention adopts an adjustable design. The height can be flexibly adjusted by rotating the adjusting rod, and stability is ensured by locking with limiting components. It is easy to install, removable and reusable, and suitable for various geological conditions and arch frames of different sizes, effectively improving construction efficiency and structural safety.

[0020] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is a structural schematic diagram of the connector of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the connector of this utility model;

[0027] In the diagram: 1. First pad block;

[0028] 2. Second pad; 3. Adjusting rod;

[0029] 4. Adjusting component; 41. Fixing sleeve; 42. Limiting hole; 43. Guide rod; 44. Guide groove; 45. Flange; 46. Stop block; 47. Limiting component;

[0030] 5. Connecting rod;

[0031] 6. Support component; 61. Outer strut; 62. Inner strut; 63. Fixing screw; 64. Fixing hole; 65. Mounting hole. Detailed Implementation

[0032] like Figure 1-4 As shown, this utility model provides a support pad for the arch foot of a tunnel arch frame, including a first pad 1, a second pad 2, and an adjusting rod 3 disposed between the first pad 1 and the second pad 2 for adjusting the distance between them by a screw. The adjusting rod 3 is a threaded rod.

[0033] An adjusting component 4 for locking the adjusting rod 3 is also provided between the first pad 1 and the second pad 2. The adjusting component 4 includes a fixed sleeve 41 and a guide rod 43 arranged sequentially from the outside to the inside. The adjusting rod 3 is located between the fixed sleeve 41 and the guide rod 43, and the three are concentrically arranged.

[0034] Furthermore, in this embodiment, the fixed sleeve 41 is fixedly connected to the second pad 2, and the bottom of the guide rod 43 is screwed to the second pad 2, making it convenient to replace guide rods 43 of different lengths to adapt to adjusting rods 3 of different lengths. The adjusting rod 3 is threadedly engaged with the fixed sleeve 41, and the adjusting rod 3 rotates along the thread to adjust the height of use.

[0035] In this embodiment, the adjusting rod 3 has a guide groove 44 inside that slides with the guide rod 43. The guide groove 44 allows the adjusting rod 3 to rotate outward along the guide rod 43 while adjusting its height. The guide rod 43 has a flange 45 circumferentially arranged on the upper outer side. The flange 45 is fixed to the upper end of the guide rod 43. The cross-section of the guide rod 43 is T-shaped.

[0036] In this embodiment, a stop block 46 is fixed on the inner side of the bottom of the adjusting rod 3. The length of the stop block 46 is adapted to the length of the flange 45. The stop block 46 is located directly below the flange 45. The flange 45 at the upper end of the guide rod 43 cooperates with the stop block 46 at the bottom of the adjusting rod 3 to prevent the adjusting rod 3 from disengaging from the guide rod 43 when adjusting its height.

[0037] In this embodiment, the adjusting rod 3 has several limiting holes 42 inside, and the guide rod 43 and the fixed sleeve 41 each have a limiting hole 42 on one side. The limiting hole 42 is provided with a limiting component 47 inside, and the limiting holes 42 on the guide rod 43 and the fixed sleeve 41 are concentrically arranged.

[0038] In this embodiment, the limiting member 47 is a T-shaped screw. The T-shaped screw passes through the limiting hole 42 through the fixing sleeve 41 and the adjusting rod 3, and is threadedly engaged with the guide rod 43. After the adjusting rod 3 is adjusted, the T-shaped screw passes through the limiting hole 42 through the fixing sleeve 41 and the adjusting rod 3, and connects with the guide rod 43 to limit the height of the adjusting rod 3.

[0039] In this embodiment, a connecting rod 5 extends laterally between the adjusting rod 3 and the first pad 1. The upper end of the adjusting rod 3 is located at the bottom of the first pad 1, and the connecting rod 5 passes through the upper ends of both the first pad 1 and the adjusting rod 3 to connect the first pad 1 and the adjusting rod 3. A support member 6 is provided between the connecting rod 5 and the second pad 2.

[0040] In this embodiment, after the height of the first pad 1 is fixed, the support member 6 is set between the connecting rod 5 and the second pad 2. The lower sides of both ends of the connecting rod 5 are provided with support members 6. The support member 6 includes an outer support rod 61, an inner support rod 62, and a fixing screw 63 set between the outer support rod 61 and the inner support rod 62 for limiting the position. The height of the support member 6 is fixed by the fixing screw 63 passing through one side of the outer support rod 61 and connecting with the inner support rod 62.

[0041] In this embodiment, the upper end of the outer support rod 61 is inserted into the connecting rod 5, so that when the first pad 1 is adjusted by the adjusting rod 3, the height of the outer support rod 61 can be reduced, temporarily separating the outer support rod 61 from the first pad 1 to avoid conflict. The outer support rod 61 is sleeved on the outside of the inner support rod 62, so that the outer support rod 61 can move on the outside of the inner support rod 62. The fixing screw 63 passes through the outer support rod 61 and is threaded into the inner support rod 62. The height of the outer support rod 61 and the inner support rod 62 is limited by the fixing screw 63. The upper surface of the second pad 2 is provided with a mounting hole 65 that matches the inner support rod 62. The bottom end of the inner support rod 62 can be fixed by screws through the mounting hole 65, which is convenient for disassembly and assembly.

[0042] In this embodiment, a plurality of fixing holes 64 are provided on one side of the inner support rod 62. The fixing holes 64 on the inner support rod 62 are blind holes. A fixing hole 64 is provided near the bottom of the outer support rod 61. The fixing hole 64 on the outer support rod 61 is a through hole. The fixing hole 64 cooperates with the fixing screw 63 to realize the external fixation of the outer support rod 61 on the inner support rod 62.

[0043] Specifically, during use, the support pad is placed at the installation position of the arch foot of the arch frame, and the second pad 2 is placed on the tunnel foundation or the poured concrete surface to ensure stability. According to the actual height and stress of the arch foot of the arch frame, the adjusting rod 3 (without the support 6 installed) is manually rotated. At the same time, the adjusting rod 3 rotates outside the guide rod 43, causing the first pad 1 to rise or fall, initially adjusting the height of the support pad so that it contacts the arch foot of the arch frame and provides a certain support force. When the appropriate height is adjusted, the limiting piece 47 passes through the limiting hole 42 through the fixing sleeve 41 and the adjusting rod 3, and is threaded with the guide rod 43. Tighten the limiting piece 47 to limit the height of the adjusting rod 3, prevent the adjusting rod 3 from sliding during use, and ensure the height of the support pad is stable. Then, the first pad 1 is connected to the arch foot of the arch frame with bolts or other connecting parts to ensure a tight connection and effective load transfer.

[0044] To further enhance the stability of the support pads, after the height adjustment is completed, two support members 6 are set between the connecting rod 5 between the first pad 1 and the adjusting rod 3 and the second pad 2. The two support members 6 and the connecting rod 5 form an inverted "U" shape. The inner support rod 62 of the support member 6 is directly inserted into the mounting hole 65 of the second pad 2 for installation, so that it can better bear the pressure of the arch foot of the arch frame. Then, the outer support rod 61 is moved upward until it is inserted into the connecting rod 5. The outer support rod 61 and the connecting rod 5 can be connected by setting a cylinder at the upper end of the outer support rod 61 and opening a round hole on the bottom surface of the connecting rod 5 that matches the cylinder for insertion. The outer support rod 61 is then fixed to the inner support rod 62 by fixing screws 63.

[0045] If the height of the support pad needs to be further adjusted after installation to fit the arch foot, first loosen the fixing screw 63 so that the outer support rod 61 can move outside the inner support rod 62, separate the outer support rod 61 from the connecting rod 5, and then continue to rotate the adjusting rod 3 to adjust the height of the support pad to ensure that the arch foot is in a stable and appropriate position. Then use the limiting piece 47 to limit the height of the adjusting rod 3, and then adjust the outer support rod 61 so that it is aligned with the connecting rod 5 to complete the adjustment work.

[0046] By using the above-described method for supporting pads at the arch feet of tunnel arch frames, it is ensured that the supporting pads can effectively support the arch feet, adapt to different geological conditions and construction requirements, and improve the safety and efficiency of tunnel construction.

[0047] It should be noted that the assembly sequence of the support pads should be carried out in a reasonable order during production and processing to avoid conflicts. For example, the guide rod 43 with flange 45 can pass through the end of the adjusting rod 3 without the stop 46, or the guide rod 43 with flange 45 can be installed first, and then the stop 46 can be fixed on the adjusting rod 3.

[0048] The first pad 1, the second pad 2, the adjusting rod 3, the adjusting component 4, the fixing sleeve 41, the guide rod 43, the flange 45, the stop block 46, the limiting component 47, the connecting rod 5, the supporting component 6, the outer support rod 61, the inner support rod 62, the fixing screw 63, and other components of this utility model are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0049] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0050] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A support pad for the arch foot of a tunnel arch frame, characterized in that, It includes a first pad (1), a second pad (2), and an adjusting rod (3) disposed between the first pad (1) and the second pad (2) for adjusting the distance between them by a screw. An adjusting member (4) for locking the adjusting rod (3) is also provided between the first pad (1) and the second pad (2). The adjusting member (4) includes a fixed sleeve (41) and a guide rod (43) arranged sequentially from the outside to the inside. The adjusting rod (3) is located between the fixed sleeve (41) and the guide rod (43), and the three are arranged concentrically.

2. The support pad for the arch foot of a tunnel arch frame according to claim 1, characterized in that, The fixed sleeve (41) is fixedly connected to the second pad (2), the bottom of the guide rod (43) is screwed to the second pad (2), and the adjusting rod (3) is threadedly engaged with the fixed sleeve (41).

3. The support pad for the arch foot of a tunnel arch frame according to claim 2, characterized in that, The adjusting rod (3) has a guide groove (44) inside that slides with the guide rod (43). The guide rod (43) has a flange (45) circumferentially arranged on the upper outer side. The flange (45) is fixed to the upper end of the guide rod (43). The cross section of the guide rod (43) is T-shaped.

4. The support pad for the arch foot of a tunnel arch frame according to claim 3, characterized in that, A stop block (46) is fixed on the inner side of the bottom of the adjusting rod (3), and the length of the stop block (46) is adapted to the length of the flange (45).

5. A support pad for the arch foot of a tunnel arch frame according to claim 4, characterized in that, The adjusting rod (3) has several limiting holes (42) inside. The guide rod (43) and the fixed sleeve (41) each have a limiting hole (42) on one side. The limiting hole (42) is provided with a limiting component (47) inside.

6. A support pad for the arch foot of a tunnel arch frame according to claim 5, characterized in that, The limiting member (47) is a T-shaped screw. The T-shaped screw passes through the limiting hole (42) through the fixing sleeve (41) and the adjusting rod (3) and is threadedly engaged with the guide rod (43).

7. A support pad for the arch foot of a tunnel arch frame according to claim 4 or 6, characterized in that, A connecting rod (5) extends laterally between the adjusting rod (3) and the first pad (1), and a support member (6) is provided between the connecting rod (5) and the second pad (2).

8. A support pad for the arch foot of a tunnel arch frame according to claim 7, characterized in that, The connecting rod (5) has a support member (6) on its lower side at both ends. The support member (6) includes an outer support rod (61), an inner support rod (62), and a fixing screw (63) for limiting the position between the outer support rod (61) and the inner support rod (62).

9. A support pad for the arch foot of a tunnel arch frame according to claim 8, characterized in that, The upper end of the outer support rod (61) is inserted into the connecting rod (5). The outer support rod (61) is sleeved on the outside of the inner support rod (62). The fixing screw (63) passes through the outer support rod (61) and is threaded into the inner support rod (62). The upper surface of the second pad (2) is provided with an installation hole (65) that is adapted to the inner support rod (62).

10. A support pad for the arch foot of a tunnel arch frame according to claim 9, characterized in that, The inner support rod (62) has several fixing holes (64) on one side. The fixing holes (64) on the inner support rod (62) are blind holes. A fixing hole (64) is opened near the bottom of the outer support rod (61). The fixing hole (64) on the outer support rod (61) is a through hole.

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