Temporary supporting device for tunnel construction

Abstract

The utility model discloses a temporary supporting device for tunnel construction. The temporary supporting device comprises an annular stiffening rib, an internal combined type supporting frame, a hydraulic jack, a jacking lead screw and a walking wheel set. The annular stiffening rib is arranged on the inner side of the inner wall of the tunnel, and a transverse distribution beam parallel to the extending direction of the tunnel is arranged between the annular stiffening rib and the inner wall of the tunnel; the internal combined support frame is arranged on the inner side of the annular stiffening rib; the hydraulic jack is mounted on the mounting pedestal of the internal combined support frame, and the end part of the hydraulic jack is propped against the annular stiffening rib; the back shore screw rod is arranged between the internal combined support frame and the annular stiffening rib; the walking wheel set is installed at the bottom of the internal combined type supporting frame. The temporary supporting device can be detached and recycled, so that the investment cost is reduced, in addition, the personal safety of operators can be guaranteed, meanwhile, due to the characteristic that different types of components can be replaced, the temporary supporting device can be matched with tunnels with various diameters, the utilization rate is high, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tunnel construction support device technical field, especially relate to a kind of temporary support device for tunnel construction. BACKGROUND

[0002] With the acceleration of global urbanization and the in-depth development and utilization of underground space, tunnel engineering has become an important part of urban infrastructure construction. Especially in large cities, underground tunnels are widely used in the fields of subway, underground passage, municipal pipe gallery and traffic diversion engineering. Due to the complex geological conditions and high-risk operating environment involved in tunnel construction, safe and efficient construction technology and support system have become the key problems that need to be solved in the engineering field.

[0003] In the process of tunnel construction, the main function of temporary support device is to provide necessary bearing capacity before the completion or stability of tunnel structure to prevent tunnel collapse or surrounding rock deformation out of control. The existing process adopts profile steel component overall transportation to operation surface, and forms rigid support frame through on-site secondary cutting and welding. This mode has significant technical defects: 1. Long construction period and high labor cost; traditional support device often needs to be cut, welded and assembled on site, which not only increases the construction time, but also leads to high labor cost. In addition, welding operation usually needs to be operated by professional welder, which is greatly affected by construction environment and personnel technical level. 2. Poor space adaptability and low universality; existing steel support device is usually customized according to tunnel size, and different diameter or shape of tunnel needs to be redesigned and processed, which leads to low universality of support device. Once the support structure is removed, it is difficult to be reused, thereby increasing the construction cost. 3. Great safety risk and poor construction environment; a large amount of toxic smoke and dust will be generated in the process of on-site welding and cutting, which affects the health of construction personnel. In addition, traditional support device usually relies on manual transportation and installation, and there is high safety risk in the operation in limited space. 4. Low recycling rate and serious resource waste; traditional support system is connected by welding and cutting, so that the removed components are difficult to be recycled or reused. Data shows that the recycling rate of current tunnel support material is generally less than 50%, and the problem of processing a large amount of waste support material has not been effectively solved.

[0004] Based on the above problems, it is urgent to develop a modular, detachable and efficient temporary support device suitable for different tunnel sizes to improve construction efficiency, reduce safety risk and improve the recycling rate of support structure, thereby reducing the overall cost of engineering. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a temporary support device for tunnel construction to solve the technical problems.

[0006] The utility model discloses a temporary support device for tunnel construction which comprises a ring-shaped stiffening rib, an internal combined support frame, a hydraulic jack, a top support lead screw and a travelling wheel set. The ring-shaped stiffening rib is arranged on the inner side of the inner wall of the tunnel. A transverse distribution beam parallel to the extension direction of the tunnel is arranged between the ring-shaped stiffening rib and the inner wall of the tunnel. The length of the transverse distribution beam is greater than or equal to the support length of the tunnel. The ring-shaped stiffening rib is arranged at a predetermined distance. The internal combined support frame is arranged on the inner side of the ring-shaped stiffening rib. The hydraulic jack is mounted on the mounting pedestal of the internal combined support frame. The end of the hydraulic jack presses the ring-shaped stiffening rib. One end of the top support lead screw is connected to the internal combined support frame. The other end of the top support lead screw abuts against the top support base on the inner side of the ring-shaped stiffening rib. The travelling wheel set is mounted on the bottom of the internal combined support frame.

[0007] Further, the ring-shaped stiffening rib is a spliced structure formed by splicing multiple segments. The segments are connected by first bolts. The ring-shaped stiffening rib and the transverse distribution beam are connected by second bolts. The first bolts and the second bolts are of the same specification and model.

[0008] Further, the internal combined support frame comprises a rectangular frame. The mounting pedestal is fixed to the rectangular frame.

[0009] Further, the rectangular frame is internally provided with diagonal supports. One end of each diagonal support is connected to the top rod of the rectangular frame. The other end of each diagonal support is connected to the side rod of the rectangular frame. The two diagonal supports are arranged in an eight-character shape.

[0010] Further, the mounting pedestal comprises a top vertical mounting pedestal and a top diagonal mounting pedestal. The top vertical mounting pedestal is mounted in the middle of the top rod of the rectangular frame. The top diagonal mounting pedestal is diagonally arranged on the two sides of the top vertical mounting pedestal.

[0011] Further, the mounting pedestal further comprises a lower diagonal mounting pedestal and a middle mounting pedestal. The lower diagonal mounting pedestal is mounted on the lower part of the side rod of the rectangular frame. The middle mounting pedestal is mounted on the middle part of the side rod of the rectangular frame.

[0012] The temporary support device of the utility model adopts bolt, pin shaft combined type assembly, can be dismantled and recycled, reduces the investment cost, and is efficient, safe and reliable in construction, saves labor, avoids welding operation in limited space compared with traditional tunnel inner support, guarantees the personal safety of operation personnel, and simultaneously due to the characteristics that it can replace different model components, can match tunnels of various diameters, has high utilization rate and wide application surface. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or other aspects of the utility model will become more apparent and more readily appreciated from the following detailed description, taken in conjunction with the accompanying drawings, which are merely illustrative and not limiting of the utility model, wherein:

[0014] Figure 1 It is a schematic view of the temporary support device for tunnel construction of an embodiment of the utility model;

[0015] Figure 2 It is a schematic view of the temporary support device for tunnel construction of an embodiment of the utility model; Figure 1 It is a right side partial enlarged schematic view of the temporary support device for tunnel construction in the utility model;

[0016] Figure 3 It is a schematic view of the internal combined type support frame of an embodiment of the utility model;

[0017] Figure 4 It is a schematic view of the internal combined type support frame of an embodiment of the utility model; Figure 3 It is a right side partial enlarged schematic view of the internal combined type support frame shown.

[0018] In the drawings, the component list represented by each sign is as follows:

[0019] 1, annular stiffening rib, 2, transverse distribution beam, 3, internal combined type support frame, 31, rectangular frame, 32, inclined support, 33, top inclined mounting pedestal, 34, lower inclined mounting pedestal, 35, middle mounting pedestal, 36, top vertical mounting pedestal, 4, second bolt, 5, hydraulic jack, 6, connecting pin shaft, 7, top support lead screw, 8, top support support, 9, walking wheel set, 10, tunnel inner wall. DETAILED DESCRIPTION

[0020] In the following, the embodiment of the temporary support device for tunnel construction of the utility model will be described with reference to the drawings.

[0021] The embodiments described herein are specific embodiments of the present application, used to illustrate the concept of the present application, and are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present application and the scope of the present application. In addition to the embodiments described herein, those skilled in the art can also employ other technical solutions that are obvious based on the content disclosed in the claims and the description of the present application, which include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0022] The drawings of the present specification are schematic drawings that assist in illustrating the concept of the present application, and schematically represent the shape of each part and the relationship therebetween. Please note that, in order to clearly show the structure of each component of the embodiments of the present application, the drawings are not drawn according to the same scale. The same reference signs are used to represent the same parts.

[0023] During tunnel construction, the main function of the temporary support device is to provide the necessary bearing capacity before the tunnel structure is completed or stabilized, so as to prevent the tunnel from collapsing or the surrounding rock from deforming out of control. In combination with Figures 1 to 4 An embodiment of the present application is described as a temporary support device for tunnel construction, which comprises:

[0024] The annular stiffening rib 1 is arranged on the inner side of the tunnel inner wall 10, and a transverse distribution beam 2 parallel to the extension direction of the tunnel is arranged between the annular stiffening rib 1 and the tunnel inner wall 10; the length of the transverse distribution beam 2 is greater than or equal to the support length of the tunnel, and the annular stiffening ribs 1 are arranged at a predetermined distance apart; in one specific embodiment, the length of the tunnel that needs to be supported is 5 meters, the length of the transverse distribution beam is 5 meters, the spacing distance of the annular stiffening ribs is 1 meter, and a total of six sets of annular stiffening ribs need to be arranged. The support force between different annular stiffening ribs can be balanced by the distribution beam, so as to avoid excessive deformation of a certain annular stiffening rib due to uneven local support. In one preferred embodiment of the temporary support device for tunnel construction, the annular stiffening rib 1 is a spliced structure spliced by multiple segments, and the segments are connected by first bolts; in Figure 1 The annular stiffening rib 1 shown in the figure is provided with a notch at the lower position for the contact of the walking wheel set and the track. In this embodiment, the annular stiffening rib 1 is spliced by seven segments, and bolt holes for connection are arranged at both ends of each segment, and the segments are connected by first bolts of appropriate structure. In one preferred embodiment, the annular stiffening rib 1 and the transverse distribution beam 2 are connected by second bolts 4, and the specifications and models of the first bolts and the second bolts 4 are the same. The model of the bolt is universal, which solves the problem of procurement and storage of different models of bolts.

[0025] The internal combined support frame 3 is arranged on the inner side of the annular stiffening rib 1; in combination with Figure 1 、 Figure 3 andFigure 4 As shown, the internal combined support frame 3 comprises a rectangular frame 31, and the mounting pedestal is fixed on the rectangular frame 31. In a preferred embodiment of the temporary support device for tunnel construction, the rectangular frame 31 is internally provided with diagonal supports 32, one end of the diagonal support 32 is connected to the top rod of the rectangular frame 31, and the other end of the diagonal support 32 is connected to the side rod of the rectangular frame 31; the two diagonal supports 32 are arranged in a figure-of-eight shape. Since the pressure from the top of the tunnel is greater than that at other positions, the pressure transmitted to the rectangular frame at this position is also greater, and the above-mentioned arrangement of the diagonal support can additionally strengthen the upper strength of the internal combined support frame, thereby avoiding structural deformation. In a preferred embodiment of the temporary support device for tunnel construction, the mounting pedestal comprises a top vertical mounting pedestal 36 and a top diagonal mounting pedestal 33, the top vertical mounting pedestal 36 is mounted in the middle of the top rod of the rectangular frame 31, and the top diagonal mounting pedestals 33 are respectively arranged outwardly and diagonally on both sides of the top vertical mounting pedestal 36. By arranging three mounting pedestals on the top rod of the rectangular frame 31, perfect support can be provided for the upper part of the tunnel. In a preferred embodiment of the temporary support device for tunnel construction, the mounting pedestal further comprises a lower diagonal mounting pedestal 34 and a middle mounting pedestal 35, the lower diagonal mounting pedestals 34 are respectively mounted on the lower part of the side rod of the rectangular frame 31, and the middle mounting pedestal 35 is mounted on the middle of the side rod of the rectangular frame 31.

[0026] The hydraulic jack 5 is mounted on the mounting pedestal of the internal combined support frame 3, and the end of the hydraulic jack 5 presses the annular stiffening rib 1.

[0027] The jacking screw 7 is connected to the internal combined support frame 3 at one end, and the other end of the jacking screw 7 abuts against the jacking support 8 located on the inner side of the annular stiffening rib 1. After the stress of the hydraulic jack is applied, the one end of the jacking screw 7 is mounted on the internal combined support frame 3 by using the connecting pin 6, and the end of the jacking screw is abutted against the stress surface of the jacking support 8 by rotating the jacking screw, so as to realize the support stress locking function and prevent the support from failing due to the stress loss of the hydraulic jack 5. In a further preferred embodiment, a stress meter can also be arranged in the screw to have a stress monitoring function, so as to timely warn and ensure safety.

[0028] In Figure 1 In a preferred embodiment of the temporary support device for tunnel construction, two jacking screws 7 are respectively mounted on the top vertical mounting pedestal 36 and the middle mounting pedestal 35, and the jacking screws 7 are arranged on both sides of the corresponding hydraulic jack 5. Since the above-mentioned positions receive the maximum pressure from the tunnel, the jacking screws arranged in the above-mentioned manner can not only avoid increasing the number of components by arranging the jacking screws on each mounting pedestal, but also can provide sufficient support stress locking at the key positions to prevent the support from failing due to the stress loss of the hydraulic jack 5.

[0029] The walking wheel set 9 is installed at the bottom of the internal combined support frame 3. After the temporary support device is completely assembled, external traction force, such as a battery car in the tunnel, can be used to realize movement in the tunnel, and other component materials can be carried in the internal space formed by the internal combined support frame, without the need to set up other transportation equipment in the narrow tunnel space, thereby reducing the labor and equipment costs generated by separate transportation.

[0030] The temporary support device for tunnel construction in the above-mentioned embodiments of the utility model is used as follows: the temporary support device can match annular stiffening ribs of different models according to different diameters of the tunnel, transverse distribution beams and hydraulic devices, after the model is determined according to the diameter of the tunnel, the internal combined support frame is assembled, the single internal combined support frame and each component are transported to the designated position by using the battery car, the annular stiffening ribs and the transverse distribution beams are assembled symmetrically on both sides from bottom to top in sequence, stress is applied by using the hydraulic jack, the transverse distribution beam is attached to the inner surface of the tunnel, after the hydraulic jack is returned, the jacking screw is installed by using the connecting pin shaft and is locked, and the jacking screw is installed on the internal combined support frame by the connecting pin shaft 6 and is rotated to the jacking support on the annular stiffening rib, the tunnel temporary internal support operation is completed by being closed into a ring from bottom to top, after the single area support task is completed, the materials can be disassembled according to the installation reverse process, are moved to the next operation area with the support frame, or are disassembled and transported out, and are transferred to the next tunnel needing support.

[0031] The temporary support device of the utility model is assembled by using bolts and pin shafts in a combination mode, can be disassembled and recycled, reduces the investment cost, is efficient, safe and reliable in construction, saves labor, avoids welding operation in the limited space compared with the traditional tunnel internal support, guarantees the personal safety of the operation personnel, can match tunnels of multiple diameters due to the replaceable different model components, has high utilization rate and wide application range.

[0032] The above-mentioned disclosed technical features are not limited to the disclosed combinations with other features, and other combinations between the technical features can be made by those skilled in the art according to the purpose of the utility model, and the purpose of the utility model is used as the criterion.

Claims

1. A temporary support device for tunnel construction, characterised in that, The utility model relates to a tunnel construction support device, which comprises a ring-shaped reinforcing rib (1), an internal combined support frame (3), a hydraulic jack (5), a jacking screw (7) and a walking wheel set (9), the ring-shaped reinforcing rib (1) is arranged on the inner side of the tunnel inner wall (10), a transverse distribution beam (2) parallel to the tunnel extension direction is arranged between the ring-shaped reinforcing rib (1) and the tunnel inner wall (10), the length of the transverse distribution beam (2) is greater than or equal to the support length of the tunnel, the ring-shaped reinforcing rib (1) is arranged at a predetermined distance, the internal combined support frame (3) is arranged on the inner side of the ring-shaped reinforcing rib (1), the hydraulic jack (5) is mounted on the mounting pedestal of the internal combined support frame (3), the end of the hydraulic jack (5) presses the ring-shaped reinforcing rib (1), one end of the jacking screw (7) is connected with the internal combined support frame (3), the other end of the jacking screw (7) abuts against the jacking support (8) on the inner side of the ring-shaped reinforcing rib (1), and the walking wheel set (9) is mounted on the bottom of the internal combined support frame (3). The ring-shaped reinforcing rib (1) is a spliced structure spliced by multiple segments, and the segments are connected by first bolts; the ring-shaped reinforcing rib (1) and the transverse distribution beam (2) are connected by second bolts (4), and the specifications and models of the first bolts and the second bolts (4) are the same.

2. The temporary support device for tunnel construction of claim 1, wherein, The internal combined support frame (3) comprises a rectangular frame (31), and the mounting pedestal is fixed on the rectangular frame (31).

3. The temporary support device for tunnel construction of claim 1, wherein, The rectangular frame (31) is internally provided with inclined supports (32), one end of the inclined support (32) is connected with the top rod of the rectangular frame (31), and the other end of the inclined support (32) is connected with the side rod of the rectangular frame (31); the two inclined supports (32) are arranged in an eight-character shape.

4. The temporary support device for tunnel construction of claim 3, wherein, The mounting pedestal comprises top vertical mounting pedestals (36) and top inclined mounting pedestals (33), the top vertical mounting pedestal (36) is mounted on the middle part of the top rod of the rectangular frame (31), and the top inclined mounting pedestals (33) are respectively arranged outward and obliquely on the two sides of the top vertical mounting pedestal (36).

5. The temporary support device for tunnel construction of claim 4, wherein, The mounting pedestal further comprises lower inclined mounting pedestals (34) and middle mounting pedestals (35), the lower inclined mounting pedestal (34) is respectively mounted on the lower part of the side rod of the rectangular frame (31), and the middle mounting pedestal (35) is mounted on the middle part of the side rod of the rectangular frame (31).

6. The temporary support device for tunnel construction of claim 5, wherein, ​

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