Supporting device for urban underground space engineering excavation

Abstract

The invention discloses a supporting device for urban underground space engineering excavation, which comprises supporting columns, supporting side plates, an arched bracket, a jacking mechanism and a supporting mechanism, the supporting columns are bilaterally symmetrically arranged along two sides of a roadway, the supporting side plates are arranged on the outer sides of the supporting columns, connecting seats are arranged at the tops of the supporting columns, and two ends of the arched bracket are respectively connected to the two connecting seats; the multiple jacking mechanisms are arranged on the outer side of the arched support in an annular mode and detachably connected with the arched support. A supporting plate is further arranged between the supporting columns, and the supporting mechanism is arranged in the supporting plate and detachably connected with the supporting side plates. By the adoption of the supporting device, adjustment can be conducted according to the actual width and height of a roadway, a formwork can be conveniently supported and fixed, the supporting requirement for underground space engineering excavation can be met, the working efficiency can be improved, the overall structure is simple, operation is convenient, the engineering excavation supporting effect is better, safety is higher, and practicability is high. And popularization and use are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering support devices, and in particular to a support device for excavation of urban underground space engineering. Background Art

[0002] As the space above ground becomes more and more urgent, considering various factors, the development of underground space is a development direction for mankind, and the utilization of underground space plays an important role in improving the ground environment. In recent years, the development and utilization of urban underground space has made great progress. In the process of urban underground space development and construction, underground engineering construction is a form of human utilization of urban underground space. With the acceleration of urbanization and the continuous increase in population density, the development and utilization of underground space has become an important direction for urban development. The construction of underground space can not only effectively alleviate the problem of urban land shortage, but also improve the comprehensive carrying capacity and operation efficiency of the city. Temporary support equipment is often needed in the construction process of underground space. The support equipment is used to support the construction environment of the staff to avoid landslides.

[0003] Tunnels are a common type of tunnel space engineering in underground spaces. The structure of tunnels consists of two parts: the main building and ancillary equipment. The main building consists of a tunnel body and a tunnel portal, while the ancillary equipment includes a car shelter, fire-fighting facilities, emergency communications, and drainage facilities. For tunnels of relatively long lengths, ventilation and lighting equipment are also required. The excavation disturbance of the tunnel will cause large deformation of the surrounding rock, and the tunnel excavation needs to be supported by corresponding support measures. If the support measures are not in place, the deformation of the surrounding rock may exceed its allowable range, which may cause tunnel collapse in severe cases, resulting in significant economic losses. At the same time, it is necessary to set up a formwork on the inner wall of the tunnel, pour concrete through the formwork, and remove the formwork after the concrete solidifies. During the construction process, the formwork needs to be fixed with multiple support equipment to prevent collapse. Since the upper part of the tunnel is semicircular, it needs to be supported one by one with the help of multiple support equipment, resulting in a large workload for fixing the formwork, which seriously affects the progress of the project.

[0004] At present, the solution to tunnel excavation protection is to support the tunnel support surface through support devices to ensure the progress and safety of the project excavation. Existing support devices generally adopt fixed support structures, using brackets and jacks for rigid support. This support method cannot be adjusted according to the actual width and height of the tunnel, resulting in its inflexible use and poor applicability. In addition, since the height of the underground space is not fixed, the height adjustment function of the bracket is indispensable. It needs to support the top of the underground space from bottom to top; stability, high flexibility and the ability to quickly install or disassemble are also necessary conditions, otherwise it will be difficult to meet market demand. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the problems existing in the background technology, thereby providing a support device with a simple structure and easy operation. The support device can be adjusted according to the actual width and height of the tunnel, so as to facilitate the support and fixation of the template to meet the support needs for excavation of underground space projects. Specifically, it is a support device for excavation of urban underground space projects.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a supporting device for excavation of urban underground space engineering, including supporting columns, supporting side plates, arched supports, a tightening mechanism and a supporting mechanism, the supporting columns are symmetrically arranged along both sides of the tunnel, the supporting side plates are arranged on the outside of the supporting columns, and a connecting seat is provided on the top of the supporting column, and the two ends of the arched support are respectively connected to two connecting seats symmetrically arranged on the left and right; there are multiple tightening mechanisms, and the multiple tightening mechanisms are arranged in a ring shape on the outside of the arched support and are detachably connected to the arched support; a support plate is also provided between the supporting columns, the support plate is arranged on the side close to the connecting seat, and the supporting mechanism is provided in the support plate and is detachably connected to the supporting side plate.

[0007] Furthermore, a supporting device for excavation of urban underground space engineering described in the present invention is adopted, and the tightening mechanism includes an arc-shaped support block, a support adjustment rod and a support sleeve, the arc-shaped support block is arranged in an arc structure, the support sleeve is fixed on the arch support and extends to the inner side of the arch support, the support sleeve is a cylindrical structure with a sealed bottom, the support adjustment rod includes a first rod member, a turning handle and a second rod member, an integrally formed threaded rod is provided at both ends of the turning handle, and the external threads on the two threaded rods have opposite rotation directions, one end of the first rod member and the second rod member are respectively threadedly connected to the threaded rods at both ends of the turning handle; the other end of the first rod member is fixed to the bottom of the inner side surface of the arc-shaped support block, and the other end of the second rod member is placed in the support sleeve.

[0008] Furthermore, in the support device for excavation of urban underground space engineering described in the present invention, the tightening mechanism also includes a rotating operating rod, and a rotating through hole matching the rotating operating rod is also provided in the middle of the rotating handle. The rotating operating rod is detachably connected to the rotating handle through the rotating through hole, and the rotating handle is driven to rotate by the rotating operating rod under the action of external force.

[0009] Furthermore, in the support device for excavation of urban underground space engineering described in the present invention, a plurality of reinforcing rods are provided on the inner wall of the arch support, and a reinforcing rod is provided between each of two adjacent supporting sleeves in the tightening mechanism.

[0010] Furthermore, a supporting device for excavation of urban underground space engineering projects described in the present invention is adopted, and the supporting mechanism includes a fixed column, a fixed cylinder, a slider, a guide rod, a supporting assembly and an adjusting assembly. The fixed column is arranged at the center of the bottom surface of the supporting plate, and two communicating fixed cylinders are symmetrically fixedly connected to the fixed column, and the inner sides of the two fixed cylinders are slidably connected with sliders, and the two sliders are fixedly connected with guide rods on the sides away from the fixed columns, and the two guide rods are provided with supporting assemblies, and the inner side of the fixed column is provided with an adjusting assembly for adjusting the distance between the two sliders; the supporting mechanism is in contact and connected with the supporting side plate through the supporting assembly.

[0011] Furthermore, a supporting device for excavation of urban underground space engineering projects described in the present invention is adopted, wherein the supporting assembly includes a connecting sleeve, a connecting rod and a supporting plate, the guide rod passes through the supporting column and extends to the outside of the supporting column, the connecting sleeve is fixed on the guide rod on the side away from the fixed column, and L-shaped connecting rods are symmetrically fixedly connected on the upper and lower sides and the left and right sides of the connecting sleeve, the supporting plate is fixed to the end of the connecting rod, and the supporting assembly is in contact with the supporting side through the support plate.

[0012] Furthermore, a supporting device for excavation of urban underground space engineering described in the present invention is adopted, and the adjusting component includes a servo motor, a forward and reverse thread transmission rod, a first gear and a second gear. The fixed column and the guide rod are both hollow tubular structures, and the sliders in the two fixed cylinders are threadedly connected with the forward and reverse thread transmission rod; the second gear is fixed to the middle of the forward and reverse thread transmission rod; the servo motor is installed at the bottom of the fixed column, and the output shaft of the servo motor is located in the inner cavity of the fixed column and penetrates upward to the fixed cylinder, and the first gear is installed at the end of the output shaft of the servo motor, and the first gear and the second gear are meshed with each other; under the action of the servo motor, the second gear is driven to rotate by the first gear, and the forward and reverse thread transmission rod is driven to rotate synchronously. During the rotation of the forward and reverse thread transmission rod, the sliders in the two fixed cylinders are driven to move synchronously inward or outward toward the center of the forward and reverse thread transmission shaft, and the support assembly and the supporting side plate are connected or separated by each other through the synchronous movement of the sliders.

[0013] Furthermore, a supporting device for excavation of urban underground space engineering projects described in the present invention is adopted, and the forward and reverse threaded transmission rod is configured as a screw structure with a smooth rod portion in the middle and threaded portions on both sides, and the second gear is fixed on the smooth rod portion in the forward and reverse threaded transmission rod, and the threaded portions located on both sides of the second gear have a positive thread on one side and a negative thread corresponding to the positive thread on the other side, and screw through holes matching the forward and reverse threaded transmission rod are respectively provided in the two sliding blocks, and the sliding blocks in the two fixed cylinders are screwed to the forward and reverse threaded transmission rod by means of threads.

[0014] Furthermore, a supporting device for excavation of urban underground space engineering projects described in the present invention is adopted, and the support column includes an upper support rod, a middle support rod, a lower support rod and connecting bolts. The upper support rod and the lower support rod are each provided with a through hole matched with the middle support rod. The upper support rod and the lower support rod are slidably fitted at both ends of the middle support rod, and are fixedly connected between the upper support rod and the lower support rod and the middle support rod by connecting bolts. The support column forms a telescopic rod structure through the upper support rod, the middle support rod and the lower support rod.

[0015] Furthermore, a supporting device for excavation of urban underground space engineering projects described in the present invention is adopted, and a support seat is also provided at the bottom of the lower support rod, and the support seat includes a base plate, a connecting seat, fastening bolts and anchor nails. The connecting seat is arranged on the top of the base plate, and a plurality of through holes corresponding to the anchor nails are provided in the base plate. The anchor nails are inserted into the tunnel ground through the through holes, and the lower support rod is fixed in the connecting seat in the support seat by fastening bolts.

[0016] Compared with the prior art, the supporting device for urban underground space engineering excavation described in the present invention has the following beneficial effects: since an adjustable tightening mechanism is provided on the outside of the arch support, the tightening mechanism can be used to support the template used for engineering excavation. At the same time, a supporting side plate is provided on the outside of the support column, and the supporting mechanism can be used to support and fix the supporting side plate. The template on the outside of the support column can be supported and fixed by the supporting side plate, so that the support needs of underground spaces of different widths can be met. In addition, the support column adopts a telescopic rod structure, so that the height of the entire supporting device can be adjusted to meet the support needs of underground spaces of different heights. It can be seen that the supporting device described in the present invention can be used to adjust according to the actual width and height of the lane, which is convenient for supporting and fixing the template, which can not only meet the support needs for underground space engineering excavation, but also improve work efficiency. It has the advantages of simple overall structure, convenient operation, low labor intensity, etc., which makes the engineering excavation support effect better and safer, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure enlargement at the center A; Figure 3 yes Figure 1 A schematic diagram of the structure enlarged at B in the middle; Figure 4 It is a structural schematic diagram of the support assembly described in the present invention.

[0019] As shown in the figure: 1-support column, 11-upper support rod, 12-middle support rod, 13-lower support rod, 14-connecting bolt, 2-support side plate, 3-arch bracket, 4-tightening mechanism, 41-arc support block, 42-support adjustment rod, 421-first rod, 422-turn handle, 423-second rod, 424-threaded rod, 43-support sleeve, 44-rotating operating rod, 5-support mechanism, 51-fixed column, 52-fixed cylinder, 53-slider, 54-guide rod, 55-connecting sleeve, 56-connecting rod, 57-support plate, 58-servo motor, 59-positive and negative threaded transmission rod, 510-first gear, 511-second gear, 6-connecting seat, 7-support plate, 8-reinforcement rod, 9-support seat, 91-bottom plate, 92-connecting seat, 93-fastening bolt, 94-anchor nail. DETAILED DESCRIPTION

[0020] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0021] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. Example 1

[0024] like Figures 1 to 4 As shown, this embodiment provides a supporting device for excavation of urban underground space engineering, including support columns 1, supporting side plates 2, arch supports 3, tightening mechanisms 4 and supporting mechanisms 5. The support columns 1 are symmetrically arranged along both sides of the tunnel, the supporting side plates 2 are arranged on the outside of the support columns 1, and a connecting seat 6 is provided on the top of the support column 1. The two ends of the arch support 3 are respectively connected to two connecting seats 6 symmetrically arranged on the left and right; there are multiple tightening mechanisms 4, and the multiple tightening mechanisms 4 are arranged in a ring shape on the outside of the arch support 3, and are detachably connected to the arch support 3; a support plate 7 is also provided between the support columns 1, and the support plate 7 is arranged on a side close to the connecting seat 6, and the supporting mechanism 5 is provided in the support plate 7, and is detachably connected to the supporting side plates 2.

[0025] Among them, the tightening mechanism 4 includes an arc-shaped support block 41, a support adjustment rod 42 and a support sleeve 43. The arc-shaped support block 41 is arranged in an arc structure. The support sleeve 43 is fixed on the arch bracket 3 and extends to the inner side of the arch bracket 3. The support sleeve 43 is a cylindrical structure with a sealed bottom. The support adjustment rod 42 includes a first rod member 421, a turning handle 422 and a second rod member 423. An integrally formed threaded rod 424 is provided at both ends of the turning handle 422, and the external threads on the two threaded rods 424 are rotated in opposite directions. One end of the first rod member 421 and the second rod member 423 are respectively threadedly connected to the threaded rods 424 at both ends of the turning handle 422; the other end of the first rod member 421 is fixed to the bottom of the inner side surface of the arc-shaped support block 41, and the other end of the second rod member 423 is placed in the support sleeve 43. In a specific preparation process, the length of the second rod 423 is greater than the length of the first rod 421 , and the second rod 423 and the supporting sleeve 43 are connected in a sliding fit.

[0026] The supporting mechanism 5 includes a fixed column 51, a fixed tube 52, a slider 53, a guide rod 54, a supporting assembly and an adjusting assembly. The fixed column 51 is arranged at the center of the bottom surface of the supporting plate 7. Two communicating fixed tubes 52 are symmetrically fixedly connected to the fixed column 51. The inner sides of the two fixed tubes 52 are slidably connected with sliders 53. The two sliders 53 are fixedly connected with guide rods 54 on the side away from the fixed column 51. The two guide rods 54 are provided with supporting assemblies, and an adjusting assembly for adjusting the distance between the two sliders 53 is provided on the inner side of the fixed column 51. The supporting mechanism 5 is in contact with and connected to the supporting side plate 2 through the supporting assembly.

[0027] Furthermore, a supporting device for excavation of an urban underground space project described in this embodiment is adopted, wherein the supporting assembly includes a connecting sleeve 55, a connecting rod 56 and a supporting plate 57, the guide rod 54 passes through the supporting column 1 and extends to the outside of the supporting column 1, the connecting sleeve 55 is fixed on the guide rod 54 on the side away from the fixed column 51, and L-shaped connecting rods 56 are symmetrically fixedly connected on the upper and lower sides and the left and right sides of the connecting sleeve 55, the supporting plate 57 is fixed to the end of the connecting rod 56, and the supporting assembly is in contact and connected with the supporting side plate 2 through the support plate 57.

[0028] The adjustment assembly includes a servo motor 58, a forward and reverse thread transmission rod 59, a first gear 510 and a second gear 511. The fixed column 51 and the guide rod 54 are both hollow tube structures. The sliders 53 in the two fixed cylinders 52 are threadedly connected with the forward and reverse thread transmission rod 59; the second gear 511 is fixed to the middle of the forward and reverse thread transmission rod 59; the servo motor 58 is installed at the bottom of the fixed column 51, and the output shaft of the servo motor 58 is located in the inner cavity of the fixed column 51 and penetrates upward to the fixed cylinder 52. The first gear 510 is installed at the bottom of the fixed column 51. Installed at the end of the output shaft of the servo motor 58, the first gear 510 and the second gear 511 are meshed with each other; under the action of the servo motor 58, the first gear 510 drives the second gear 511 to rotate, and synchronously drives the forward and reverse thread transmission rod 59 to rotate. During the rotation of the forward and reverse thread transmission rod 59, the sliders 53 in the two fixed cylinders 52 are driven to move synchronously inward or outward toward the center of the forward and reverse thread transmission shaft 59. Through the synchronous movement of the sliders 53, the support assembly and the supporting side plate 2 are connected or separated from each other in a close contact. In the specific manufacturing process, the first gear 510 and the second gear 511 are both selected to be bevel gears that mesh with each other, so as to realize the transmission of the forward and reverse thread transmission rod 59.

[0029] Further, a supporting device for excavation of an urban underground space project described in this embodiment is adopted, the forward and reverse thread transmission rod 59 is set as a screw structure with a smooth rod portion in the middle and threaded portions on both sides, the second gear 511 is fixed on the smooth rod portion in the forward and reverse thread transmission rod 59, and the threaded portions on both sides of the second gear 511, one side of which is a positive thread and the other side is a negative thread corresponding to the positive thread, and screw-connected through holes matching the forward and reverse thread transmission rod 59 are respectively provided in the two sliders 53, and the sliders 53 in the two fixed cylinders 52 are screwed with the forward and reverse thread transmission rod 59 by means of threads. In the specific manufacturing process, the length of the forward and reverse thread transmission rod 59 needs to be greater than the fixed cylinder 52, and the threaded portions at both ends thereof need to extend outwardly into the inner cavity of the guide rod 54 after passing through the slider 53, so as to enhance the stability of the forward and reverse thread transmission rod 59, and it is also necessary to use the end of the fixed cylinder 52 to limit the movement of the slider 53 to prevent the slider 53 from moving outward to the outside of the fixed cylinder 52.

[0030] Furthermore, a supporting device for excavation of an urban underground space engineering project described in this embodiment is adopted, and a plurality of reinforcing rods 8 are also provided on the inner wall of the arch support 3, and a reinforcing rod 8 is respectively provided between two adjacent supporting sleeves 43 in the tightening mechanism 4. Through the configured reinforcing rods 8, the structural strength of the arch support 3 can be improved, the deformation of the arch support 3 can be prevented, and the stability of the arch support 3 can be enhanced. Example 2

[0031] This embodiment is based on the embodiment 1. In order to reduce the labor intensity and facilitate the operation of the jacking mechanism 4, the support device provided by this embodiment is adopted. The jacking mechanism 4 also includes a rotating operating rod 44. A rotating through hole matching the rotating operating rod 44 is also provided in the middle of the rotating handle 422. The rotating operating rod 44 is detachably connected to the rotating handle 422 through the rotating through hole. Under the action of external force, the rotating handle 422 is driven to rotate by the rotating operating rod 44. When using the configured rotating operating rod 44, one end of the rotating operating rod 44 is passed through the rotating through hole, and the two ends are located outside the rotating handle 422. The rotating operating rod 44 is held with both hands, and the rotating operating rod 44 is rotated with force. The rotating operating rod 44 is used to drive the rotating handle 422 to rotate, and finally the arc-shaped support block 41 is tightened by the support adjustment rod 42, so as to achieve the support and fixation of the template. Example 3

[0032] This embodiment is based on the embodiment 2. In order to meet the use requirements of the support device for different heights and facilitate the adjustment of the support column 1, the support device provided by this embodiment is adopted. The support column 1 includes an upper support rod 11, a middle support rod 12, a lower support rod 13 and a connecting bolt 14. The upper support rod 11 and the lower support rod 13 are provided with through holes adapted to the middle support rod 12. The upper support rod 11 and the lower support rod 13 are slidably matched at both ends of the middle support rod 12, and the upper support rod 11 and the lower support rod 13 are fixedly connected to the middle support rod 12 by connecting bolts 14. The support column 1 is formed into a telescopic rod structure by the upper support rod 11, the middle support rod 12 and the lower support rod 13. By setting the support column 1 as a telescopic rod structure, the length of the support column 1 can be adjusted according to the height of different lane side walls to meet the support height requirements of the tightening mechanism 4 and enhance the applicability of the support device. Example 4

[0033] This embodiment is based on the embodiment 3. In order to enhance the stability of the support column 1 and facilitate installation and disassembly, the support device provided by this embodiment is adopted. A support seat 9 is further provided at the bottom of the lower support rod 13. The support seat 9 includes a bottom plate 91, a connecting seat 92, a fastening bolt 93 and an anchoring nail 94. The connecting seat 92 is arranged on the top of the bottom plate 91, and a plurality of through holes corresponding to the anchoring nails 94 are provided in the bottom plate 91. The anchoring nails 94 pass through the through holes and are inserted into the tunnel ground, and the lower support rod 13 is fixed in the connecting seat 92 in the support seat 9 by the fastening bolts 93. Through the configured support seat 9, the contact area between the support column 1 and the ground can be increased, thereby improving the stability of the entire support device.

[0034] The supporting device for excavation of urban underground space engineering described in the present invention has the following working principle and use process: during installation, the height of the support column 1 can be adjusted according to the height of the side wall of the tunnel, and the fixing is completed by connecting bolts 14, and then the support plate 7 is installed between the support columns 1, and then the two ends of the arch support 3 are respectively connected to the two connecting seats 6 arranged symmetrically on the left and right, and then the arrangement of the tightening mechanism 4 is completed in sequence, and finally it is fixed between two adjacent support sleeves 43 through the reinforcing rod 8. During use, the rotating operating rod 44 is used to drive the rotating handle 422 to rotate, and finally the arc support block 41 is tightened by the support adjustment rod 42, so as to realize the support and fixation of the template arranged outside the arc support block 41.

[0035] After the tightening mechanism 4 is completed to support and fix the formwork, when it is necessary to support both sides of the support tunnel, the supporting side plate 2 is set on the outside of the supporting column 1, and the supporting mechanism 5 is installed at the bottom of the supporting plate 7 in advance, and the servo motor 58 in the adjusting assembly is started, and the second gear 511 is driven to rotate through the first gear 510, and the forward and reverse thread transmission rod 59 is driven to rotate synchronously. During the rotation of the forward and reverse thread transmission rod 59, the sliders 53 in the two fixed cylinders 52 are driven to move synchronously inward or outward toward the center of the forward and reverse thread transmission shaft 59, and the contact connection between the supporting assembly and the supporting side plate 2 is achieved through the synchronous movement of the slider 53. The support assembly includes a connecting sleeve 55, a connecting rod 56 and a support plate 57. The guide rod 54 passes through the support column 1 and extends to the outside of the support column 1. The connecting sleeve 55 is fixed on the guide rod 54 on the side away from the fixed column 51. L-shaped connecting rods 56 are symmetrically fixedly connected on the upper and lower sides and the left and right sides of the connecting sleeve 55. The support plate 57 is fixed to the end of the connecting rod 56. In this way, the four groups of support plates 57 arranged symmetrically can be in contact and connected with the support side plates 2. Finally, the support side plates 2 can be used to support the templates on both sides of the support tunnel. The width can be adjusted through the configured adjustment components to meet the support requirements of different widths.

[0036] It can be seen that by adopting the support device described in the present invention, since an adjustable tightening mechanism 4 is provided on the outside of the arch bracket 3, the tightening mechanism 4 can be used to support the formwork used for engineering excavation. At the same time, a supporting side plate 2 is provided on the outside of the support column 1, and the supporting mechanism 5 can be used to support and fix the supporting side plate 2. The formwork on the outside of the support column 1 is supported and fixed by the supporting side plate 2, and the support needs of underground spaces of different widths can be met. In addition, the support column 1 adopts a telescopic rod structure, so that the height of the entire support device can be adjusted, thereby meeting the support needs of underground spaces of different heights.

[0037] To sum up, the support device described in the present invention can be used adjustably according to the actual width and height of the tunnel, which is convenient for supporting and fixing the formwork. It can not only meet the support needs for underground space engineering excavation, but also improve work efficiency. It has the advantages of simple overall structure, easy operation, low labor intensity, etc., which makes the engineering excavation support effect better and safer, and is suitable for popularization and use.

[0038] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0039] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. The above description is only a preferred implementation method of the present invention and does not limit the present invention. Any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.

Claims

1. A supporting device for excavation of urban underground space engineering, characterized in that: The invention comprises a support column (1), a supporting side plate (2), an arch support (3), a tightening mechanism (4) and a supporting mechanism (5), wherein the support column (1) is symmetrically arranged along both sides of the tunnel, the supporting side plate (2) is arranged on the outside of the support column (1), a connecting seat (6) is arranged on the top of the support column (1), and the two ends of the arch support (3) are respectively connected to two connecting seats (6) symmetrically arranged on the left and right; a plurality of the tightening mechanisms (4) are arranged in a ring shape on the outside of the arch support (3) and are detachably connected to the arch support (3); a supporting plate (7) is also arranged between the support columns (1), the supporting plate (7) is arranged on a side close to the connecting seat (6), and the supporting mechanism (5) is arranged in the supporting plate (7) and is detachably connected to the supporting side plate (2).

2. The supporting device for excavation of urban underground space engineering according to claim 1, characterized in that: The tightening mechanism (4) comprises an arc-shaped support block (41), a support adjustment rod (42) and a support sleeve (43); the arc-shaped support block (41) is arranged in an arc structure; the support sleeve (43) is fixed on the arch support (3) and extends to the inner side of the arch support (3); the support sleeve (43) is a cylindrical structure with a sealed bottom; the support adjustment rod (42) comprises a first rod member (421), a rotating handle (422) and a second rod member (423); The two ends of the rotating handle (422) are provided with an integrally formed threaded rod (424), and the external threads on the two threaded rods (424) are screwed in opposite directions. One end of the first rod (421) and the second rod (423) are respectively threadedly connected to the threaded rods (424) at the two ends of the rotating handle (422); the other end of the first rod (421) is fixed to the bottom of the inner side surface of the arc-shaped support block (41), and the other end of the second rod (423) is placed in the support sleeve (43).

3. A supporting device for excavation of urban underground space engineering according to claim 2, characterized in that: The tightening mechanism (4) further comprises a rotating operating rod (44), and a rotating through hole matching the rotating operating rod (44) is also provided in the middle of the rotating handle (422). The rotating operating rod (44) is detachably connected to the rotating handle (422) via the rotating through hole. Under the action of an external force, the rotating handle (422) is driven to rotate via the rotating operating rod (44).

4. The supporting device for excavation of urban underground space engineering according to claim 2, characterized in that: A plurality of reinforcing rods (8) are also provided on the inner side wall of the arch support (3), and a reinforcing rod (8) is respectively provided between two adjacent supporting sleeves (43) in the tightening mechanism (4).

5. The supporting device for excavation of urban underground space engineering according to claim 1, characterized in that: The support mechanism (5) comprises a fixed column (51), a fixed cylinder (52), a slider (53), a guide rod (54), a support assembly and an adjustment assembly. The fixed column (51) is arranged at the center of the bottom surface of the support plate (7). Two communicating fixed cylinders (52) are symmetrically fixedly connected to the fixed column (51). The inner sides of the two fixed cylinders (52) are slidably connected with sliders (53). The sides of the two sliders (53) away from the fixed column (51) are fixedly connected with guide rods (54). The two guide rods (54) are provided with support assemblies, and the inner side of the fixed column (51) is provided with an adjustment assembly for adjusting the distance between the two sliders (53). The support mechanism (5) is contacted and connected with the supporting side plate (2) through the support assembly.

6. The supporting device for excavation of urban underground space engineering according to claim 5, characterized in that: The support assembly comprises a connecting sleeve (55), a connecting rod (56) and a supporting plate (57); the guide rod (54) passes through the supporting column (1) and extends to the outside of the supporting column (1); the connecting sleeve (55) is fixed to the guide rod (54) on the side away from the fixing column (51); L-shaped connecting rods (56) are symmetrically fixedly connected to the upper and lower sides and the left and right sides of the connecting sleeve (55); the supporting plate (57) is fixed to the end of the connecting rod (56); and the support assembly is in contact with and connected to the supporting side plate (2) via the supporting plate (57).

7. The supporting device for excavation of urban underground space engineering according to claim 5, characterized in that: The adjustment assembly comprises a servo motor (58), a forward and reverse thread transmission rod (59), a first gear (510) and a second gear (511); the fixed column (51) and the guide rod (54) are both hollow tube structures; the sliders (53) in the two fixed cylinders (52) are threadedly connected to the forward and reverse thread transmission rod (59); the second gear (511) is fixed to the middle of the forward and reverse thread transmission rod (59); the servo motor (58) is installed at the bottom of the fixed column (51); the output shaft of the servo motor (58) is located in the inner cavity of the fixed column (51) and penetrates upward to the fixed cylinder (52); the first gear (510) is connected to the fixed column (52); 0) is installed at the end of the output shaft of the servo motor (58), and the first gear (510) and the second gear (511) are meshed with each other; under the action of the servo motor (58), the first gear (510) drives the second gear (511) to rotate, and synchronously drives the forward and reverse thread transmission rod (59) to rotate. During the rotation of the forward and reverse thread transmission rod (59), the sliders (53) in the two fixed cylinders (52) are driven to move synchronously inward or outward toward the center of the forward and reverse thread transmission shaft (59). Through the synchronous movement of the sliders (53), the support assembly and the supporting side plate (2) are in close contact with each other or separated from each other.

8. The supporting device for excavation of urban underground space engineering according to claim 7, characterized in that: The forward and reverse thread transmission rod (59) is configured as a screw structure with a smooth rod portion in the middle and threaded portions on both sides. The second gear (511) is fixed to the smooth rod portion in the forward and reverse thread transmission rod (59). The threaded portions on both sides of the second gear (511) have a positive thread on one side and a negative thread corresponding to the positive thread on the other side.

9. The supporting device for excavation of urban underground space engineering according to claim 1, characterized in that: The support column (1) comprises an upper support rod (11), a middle support rod (12), a lower support rod (13) and a connecting bolt (14); the upper support rod (11) and the lower support rod (13) are both provided with through holes matched with the middle support rod (12); the upper support rod (11) and the lower support rod (13) are slidably matched at the two ends of the middle support rod (12); and the upper support rod (11) and the lower support rod (13) are fixedly connected with the middle support rod (12) by the connecting bolt (14); the support column (1) forms a telescopic rod structure through the upper support rod (11), the middle support rod (12) and the lower support rod (13).

10. A supporting device for excavation of an urban underground space engineering project according to claim 9, characterized in that: A support seat (9) is also provided at the bottom of the lower support rod (13), and the support seat (9) includes a base plate (91), a connecting seat (92), a fastening bolt (93) and an anchoring nail (94). The connecting seat (92) is arranged on the top of the base plate (91), and a plurality of through holes corresponding to the anchoring nails (94) are provided in the base plate (91). The anchoring nails (94) pass through the through holes and are inserted into the tunnel ground, and the lower support rod (13) is fixed in the connecting seat (92) in the support seat (9) by the fastening bolts (93).

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