Temporary supporting structure used before underground structure holing

Abstract

The utility model discloses a temporary supporting structure used before holing of an underground structure. The temporary supporting structure comprises a plurality of pipe joints which are sequentially fixed and connected in a sealed mode. Wherein a holing area is arranged on one side of part of the connected pipe joints, and the supporting structure is characterized by further comprising supporting beams, and the supporting beams are arranged above and below the holing area and abut against the inner walls of the pipe joints; the two ends of the supporting beam both exceed the boundaries of the corresponding ends of the holing area, each end at least exceeds a complete pipe joint adjacent to the boundaries of the corresponding ends of the holing area, a connecting piece is pre-buried on the inner wall of the pipe joint at the abutting position of the supporting beam, and the supporting beam is further fixedly connected with the pipe joint through the connecting piece. The working condition that the bearing capacity of an original structure is reduced due to hole opening operation of the duct piece can be effectively handled, and the stability and the safety of the whole structure are ensured; meanwhile, installation is easy and convenient, the construction period is shortened, and construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe jacking construction, and particularly relates to a temporary support structure for underground structures before opening holes. Background Technique

[0002] During the pipe jacking construction process, it is sometimes necessary to open holes in the pipe segments of the pipe jacking to meet specific engineering requirements. Since opening holes will weaken the bearing capacity of the original structure, before opening holes in the underground structure, in order to ensure the safety of construction workers, measures must be taken to support and stabilize the surrounding soil. As an effective support measure, the temporary support structure can prevent soil collapse and provide a safe working environment for construction workers. Its functions and significance lie in ensuring construction safety, protecting the surrounding environment, improving construction efficiency, adapting to complex geological conditions, and meeting the requirements of specifications, etc.

[0003] The existing temporary support forms used before opening holes in underground structures mainly use steel beams and steel columns as temporary support structures. This method can support and protect underground structures to a certain extent, but it has high requirements for installation accuracy and welding quality during construction, and there are defects such as incomplete penetration, slag inclusion, and cracks, which affect the connection strength and overall stability. Content of the Utility Model

[0004] In view of the above technical defects existing in the existing temporary support structure used before opening holes in underground structures, the utility model provides a temporary support structure with convenient installation, good stability and safety, which saves the construction period and improves the work efficiency.

[0005] In order to achieve the above technical effects, the technical solution adopted by the utility model is:

[0006] A temporary support structure for underground structures before opening holes, including a plurality of pipe sections fixedly and hermetically connected in sequence; wherein, an opening area is provided on one side of some connected pipe sections, and it further includes a support beam, the support beam is arranged above and below the opening area and abuts against the inner wall of the pipe section; both ends of the support beam exceed the boundaries of the corresponding ends of the opening area, and each end exceeds at least one complete pipe section adjacent to the corresponding end boundary of the opening area. Connectors are embedded on the inner wall of the pipe section at the abutting position of the support beam, and the support beam is also fixedly connected to the pipe section through the connectors.

[0007] Further, the support beam is a profiled steel beam, which has at least one horizontal end and one vertical end in cross-section, the end faces of the horizontal end and the vertical end both abut against the inner wall of the pipe section, and the horizontal end and the vertical end are both fixedly connected to the connector.

[0008] Further, the support beam is a profiled steel beam, which has at least one arc end matching the arc surface of the pipe section in cross-section, the arc end abuts against the inner wall of the pipe section and is fixedly connected to the connector.

[0009] Furthermore, the support beam is a reinforced concrete beam, the cross-section of the support beam is a fan-shaped structure, and horizontal transverse bars, longitudinal main bars, vertical bars and stirrups are arranged inside the support beam. The horizontal transverse bars and the vertical bars are perpendicularly and fixedly connected to the longitudinal main bars, and the horizontal transverse bars and the vertical bars are also fixedly connected to the connectors at the corresponding positions of the pipe sections.

[0010] Furthermore, the connector is a coupler. The outer end of the coupler is flush with the inner wall of the corresponding pipe section, and the inner end of the coupler is fixedly connected to the main bar inside the pipe section by welding a tension bar; the coupler and the support beam are connected by bolts or welding.

[0011] Furthermore, 2-3 first couplers and 2-3 second couplers are pre-embedded above and below the opening area of each pipe section, and the two are not both 3 at the same time. The couplers are symmetrically arranged left and right on the pipe section.

[0012] Furthermore, the connector is a steel plate member. The steel plate member includes a pre-embedded steel plate on the inner wall of the pipe section and stud bolts pre-embedded in the pipe section. The small head end of the stud bolt is fixedly welded to the inner surface of the pre-embedded steel plate.

[0013] Furthermore, two rows of steel plate members are provided above and below the opening area of each pipe section. The pre-embedded steel plates of the two rows of steel plate members on the same side of the opening area are fixedly welded to the upper and lower ends of the support beam on that side.

[0014] Furthermore, 3-4 steel plate members are arranged at intervals in each row of steel plate members on each pipe section, and are symmetrically arranged left and right on the pipe section.

[0015] Furthermore, four stud bolts are provided on the pre-embedded steel plate, and the four stud bolts are arranged at the vertices of a rectangle.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] By constructing a temporary enhanced structural system with a support beam as the main body and pre-embedding connectors in the pipe section and fixing the connectors to the support beam, the present utility model can effectively cope with the working condition of the decrease in the bearing capacity of the original structure caused by the hole-opening operation of the segment, ensuring the stability and safety of the overall structure; at the same time, the installation is simple, the construction period is saved, and the construction efficiency is improved.

[0018] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Description of the Drawings

[0019] Figure 1 Cross-sectional view of the temporary support structure in Embodiment 1 using a coupler as a connecting member;

[0020] Figure 2 For Figure 1 A-A cross-sectional view of

[0021] Figure 3 For Figure 1 Enlarged view of part B of

[0022] Figure 4 Cross-sectional view of the temporary support structure in Embodiment 1 using a steel plate member as a connecting member;

[0023] Figure 5 For Figure 4 C-C cross-sectional view of

[0024] Figure 6 For Figure 4 Enlarged view of part D of

[0025] Figure 7 Stereo structure diagram of the steel plate member in Embodiment 1;

[0026] Figure 8 Cross-sectional structure diagram of the box-shaped reinforcement beam in Embodiment 2;

[0027] Figure 9 Cross-sectional structure diagram of a steel section beam in Embodiment 3;

[0028] Figure 10 Cross-sectional structure diagram of another steel section beam in Embodiment 3;

[0029] Figure 11 Connection structure diagram of the support beam and the coupler in Embodiment 4.

[0030] The reference numerals and corresponding names in the drawings are:

[0031] 1. Pipe section, 11. First pipe section, 12. Second pipe section,

[0032] 13. Third pipe section, 2. Holed area, 3. Support beam,

[0033] 31. Horizontal end, 32. Vertical end, 33. Arc end,

[0034] 34. Rib plate, 35. Horizontal transverse reinforcement, 36. Longitudinal main reinforcement,

[0035] 37. Vertical reinforcement, 38. Stirrup, 4. Connector,

[0036] 41. Coupler, 411. First coupler, 412. Second coupler,

[0037] 413. Tie bar, 42. Steel plate member, 421. Embedded steel plate,

[0038] 422. Stud, 43. Bolt. Detailed implementation mode

[0039] Embodiment 1

[0040] As shown in Figures 1-5 A temporary support structure for an underground structure before opening a hole includes a plurality of sequentially fixed and sealed rectangular jacking pipe sections 1 and a support beam 3 installed on the inner wall of the pipe section 1. Among them, an opening area 2 is provided on one side of some connected pipe sections 1. The four corners of the pipe section 1 are all arc corner structures, which include a first pipe section 11, a second pipe section 12 and a third pipe section 13 of the same size. The first pipe section 11 is the main pipe section forming the opening area, the second pipe section 12 is arranged on both sides of a plurality of closely connected first pipe sections 11, and the third pipe section 13 is arranged outside the second pipe sections 12 on both sides, and the third pipe section 13 is a common pipe section. The specific number of the first pipe sections 11 is determined according to the size of the opening area 2 actually required and the length of the pipe section 1 itself. There is at least one second pipe section on each side of the opening area 2. The support beam 3 is arranged at the corner parts of the first pipe section 11 above and below the opening area 2. Both ends of the support beam 3 extend beyond the boundary of the opening area 2, and each end extends at least beyond the length of one second pipe section 12. Preferably, 2-4 second pipe sections 12 are provided on each side of the opening area 2, and both ends of the support beam 3 are flush with the outer ends of the outermost second pipe sections 12. In this way, the support beam 3 lifts at least two pipe sections on both sides of the opening area 2, which can prevent the structure from being damaged due to excessive structural deformation when the pipe section is opened. The support beam 3 abuts against the arc-shaped inner wall of the pipe section 1 in its area. Connectors 4 are embedded on the inner walls of the first pipe section 11 and the second pipe section 12 on one side of the opening area 2 and at their arc corner parts. The support beam 3 is fixedly connected to the first pipe section 11 and the second pipe section 12 through the connectors 4.

[0041] Preferably, the connector 4 is a coupler 41 or a steel plate member 42 composed of an embedded steel plate 421 and a stud 422.

[0042] When the connecting member 4 adopts a coupler 41, the coupler 41 is embedded in the inner walls of the first pipe section 11 and the second pipe section 12. Its outer end is flush with the inner wall of the pipe section, and its inner end is fixedly connected to the internal main reinforcement of the pipe section by welding a tie bar 413. The coupler 41 and the support beam 3 are connected by bolts or welded by a jig. Two groups of couplers 41 are provided at the upper and lower corner parts of the first pipe section 11 and the second pipe section 12. One group is the first coupler 411 arranged horizontally, and the other group is the second coupler 412 arranged vertically. The first coupler 411 is closer to the opening area 2 than the second coupler 412. More preferably, the number of the first couplers 411 and the second couplers 412 embedded at the upper and lower corner parts of the first pipe section 11 and the second pipe section 12 is 2-4, and any first coupler 411 and any second coupler 412 on the same side (upper or lower) of the pipe section are not in the same vertical plane.

[0043] When the connecting member 4 adopts a steel plate member 42, the embedded steel plate 421 of the steel plate member 42 is embedded in the inner walls of the first pipe section 11 and the second pipe section 12. Its outer end is flush with the inner wall of the pipe section, and the stud 422 is embedded inside the pipe section. The small head end of it is fixedly welded to the inner surface of the embedded steel plate 421. Two rows of steel plate members 42 are provided at the upper and lower corner parts of the first pipe section 11 and the second pipe section 12. The embedded steel plates 421 of the two rows of steel plate members 42 on the same side (upper or lower) of the opening area are correspondingly welded to the upper and lower ends of the support beam 3 on this side. More preferably, as Figure 7 shown, each steel plate member 42 is provided with four studs 422, and the four studs 422 are arranged in a rectangular vertex structure on the embedded steel plate. 3-4 steel plate members 42 are arranged at intervals in each row of the steel plate members 42 on each pipe section 1, and are arranged symmetrically left and right on the pipe section 1. In addition, when the connecting member 4 adopts a steel plate member 42, the inner surface of the embedded steel plate 421 can also be connected to the internal main reinforcement of the pipe section by welding a tie bar.

[0044] The utility model takes the support beam as the main body, embeds a connecting member in the pipe section, and fixes the connecting member and the support beam to form a temporary enhanced structural system, so as to effectively cope with the working condition that the bearing capacity of the original structure of the segment decreases due to the opening operation, and ensure the stability and safety of the overall structure; at the same time, the installation is simple, the construction period is saved, and the construction efficiency is improved. By adopting a coupler or a steel plate member as the connecting member, the inner end of the coupler is connected to the main reinforcement of the pipe section by welding a tie bar or the small head of the stud is welded to the embedded steel plate, so as to effectively ensure the connection strength of the connecting member in the pipe section, and further ensure the connection strength and reliability between the support beam and the pipe section. In addition, by arranging a plurality of steel plate members at intervals in the pipe section, the support beam and the discontinuous embedded steel plates on the pipe section are welded, so as to reduce the labor intensity, shorten the welding time, improve the work efficiency and save the cost.

[0045] Example Two

[0046] This embodiment is based on Example One. The support beam 3 is made of a profiled steel beam, which has at least one horizontal end 31 and one vertical end 32 in cross-section. The end faces of the horizontal end 31 and the vertical end 32 are both abutted against the inner walls of the first pipe section 11 and the second pipe section 12, and both the horizontal end 31 and the vertical end 32 are fixedly connected to the connecting member 4, and the horizontal end 31 is closer to the opening area 2 than the vertical end 32. Preferably, the profiled steel beam can be an L-shaped structural beam as shown in Figure 3 , 6 . Or an L-shaped reinforced beam formed by adding rib plates inside the L-shaped structural beam. Or a box-shaped beam formed by closing the open end of the L-shaped structural beam with an arc-shaped sealing plate, or a box-shaped reinforced beam formed by adding rib plates 34 inside the box-shaped beam as shown in Figures 8-10 . The rib plates 34 added inside the box-shaped beam can be arranged horizontally, vertically and / or obliquely.

[0047] As shown in Figure 3 , when the connecting member 4 is a coupler 41, through holes are provided at the parts of the horizontal end 31 and the vertical end 32 corresponding to the connecting member 4. The horizontal end 31 is fixedly connected to the second coupler 412 through a bolt 43 inserted into its through hole, and the vertical end 32 is fixedly connected to the first coupler 411 through a bolt 43 inserted into its through hole. Of course, when using other profiled steel beams except the L-shaped structural beam, through holes are also provided at the corresponding parts on the rib plates or arc-shaped sealing plates where the bolts pass through to form interference parts.

[0048] As shown in Figure 6 , when the connecting member 4 is a steel plate member 42, the end faces of the horizontal end 31 and the vertical end 32 are respectively abutted against the surfaces of the embedded steel plates 421 in the corresponding rows and are welded and fixed to the embedded steel plates 421. Preferably, the four stud bolts 422 of each steel plate member 42 are distributed in pairs on both sides of the horizontal end 31 or the vertical end 32.

[0049] By using a profiled steel beam as the support beam and using a coupler or a steel plate member as the connecting member, the present utility model makes the installation of the support beam convenient and fast, and the disassembly is simple after construction. The disassembled support beam can be recycled.

[0050] Example Three

[0051] This embodiment is based on Example One. The support beam 3 is made of a profiled steel beam, which has at least one arc-shaped end 33 that matches the arc-shaped corner surface of the pipe section 1 in cross-section, and its arc-shaped end 33 is abutted against the inner wall of the pipe section 1 and is fixedly connected to the connecting member 4. Preferably, the profiled steel beam can be as shown in Figures 8-10The box girder or reinforced girder shown can also be other special-shaped girders with arc-shaped ends 33, etc. When the connecting member 4 adopts a coupler 41, through holes are provided at the positions of the arc-shaped ends 33 of the steel girder corresponding to the couplers 41, and the arc-shaped ends 33 are fixedly connected to the couplers 41 by bolts 43. When the connecting member 4 adopts a steel plate member 42, the upper and lower parts of its arc-shaped ends 33 are fixedly connected to the embedded steel plates 421 by welding. Of course, in this embodiment, when the steel girder has both arc-shaped ends 33, horizontal ends 31, and vertical ends 32, this embodiment has certain similarities with Embodiment 2, except that one is fixedly connected to the connecting member 4 through the horizontal end 31 and vertical end 32 of the steel girder, and the other is fixedly connected to the connecting member 4 through the arc-shaped end 33 of the steel girder.

[0052] Embodiment 4

[0053] This embodiment is based on Embodiment 1, and its support girder 3 adopts a reinforced concrete girder, as Figure 11 shown. The cross-section of the support girder 3 is a fan-shaped structure. The support girder 3 is internally provided with horizontal transverse bars 35, longitudinal main bars 36, vertical bars 37, and stirrups 38. The horizontal transverse bars 35 and vertical bars 37 are both perpendicularly and fixedly connected to some of the longitudinal main bars 36. At the same time, the horizontal transverse bars 35 and vertical bars 37 are also fixedly connected to the connecting member 4 at the corresponding positions of the pipe section 1. Specifically, when the connecting member 4 adopts a coupler 41, the horizontal transverse bars 35 and vertical bars 37 extend out of the reinforced concrete girder and are inserted into the couplers 41 at the corresponding positions and fixedly connected to the couplers 41. When the connecting member 4 adopts a steel plate member 42, the horizontal transverse bars 35 and vertical bars 37 are welded to the embedded steel plates 421 by welding.

[0054] The utility model adopts a reinforced concrete girder as the support girder, and connects the coupler or steel plate member by using the internal steel bars, which is convenient and fast in material taking and construction, and has a low construction cost.

[0055] The utility model is not limited to the above specific embodiments. For those of ordinary skill in the art, starting from the above concept, all kinds of transformations made without creative labor fall within the protection scope of the utility model.

Claims

1. A temporary support structure for underground structures before opening a hole, comprising a plurality of pipe sections fixed in sequence and sealed and connected; wherein one side of some of the connected pipe sections is provided with an opening area, characterized in that: It also includes a supporting beam, which is arranged above and below the opening area and abuts against the inner wall of the pipe segment; both ends of the supporting beam extend beyond the corresponding end boundary of the opening area, and each end extends beyond the corresponding end boundary of the opening area by at least one pipe segment length, and a connecting piece is pre-embedded on the inner wall of the pipe segment at the abutment of the supporting beam, and the supporting beam is also fixedly connected to the pipe segment through the connecting piece.

2. A temporary support structure for underground structure before opening a hole according to claim 1, characterized in that: The support beam is a steel beam having at least one horizontal end and one vertical end in cross section. The end faces of the horizontal end and the vertical end are both in contact with the inner wall of the pipe segment, and the horizontal end and the vertical end are fixedly connected to the connecting piece.

3. A temporary support structure for underground structure before opening a hole according to claim 1, characterized in that: The support beam is a steel beam, which has at least one arc-shaped end in cross section that matches the arc-shaped surface of the pipe segment. The arc-shaped end abuts against the inner wall of the pipe segment and is fixedly connected to the connecting piece.

4. A temporary support structure for underground structure before opening a hole according to claim 1, characterized in that: The supporting beam is a reinforced concrete beam with a fan-shaped cross-section. Horizontal transverse reinforcement, longitudinal main reinforcement, vertical reinforcement and stirrups are arranged inside the supporting beam. The horizontal transverse reinforcement and vertical reinforcement are vertically fixedly connected to the longitudinal main reinforcement, and the horizontal transverse reinforcement and vertical reinforcement are also fixedly connected to the connecting pieces at the corresponding positions of the pipe sections.

5. A temporary support structure for underground structure before opening a hole according to any one of claims 1 to 4, characterized in that: The connecting piece is a connector, the outer end of the connector is flush with the inner wall of the corresponding pipe segment, and the inner end of the connector is fixedly connected to the main reinforcement inside the pipe segment by welding reinforcement; the connector and the supporting beam are connected by bolts or welding.

6. A temporary support structure for underground structure before opening a hole according to claim 5, characterized in that: Each pipe segment is pre-buried with 2-4 first connectors and 2-4 second connectors above and below the opening area, and any first connector and any second connector located above or below the same side of the pipe segment are not on the same vertical plane.

7. A temporary support structure for underground structure before opening a hole according to any one of claims 1 to 4, characterized in that: The connecting piece is a steel plate component, which includes a pre-embedded steel plate embedded in the inner wall of the pipe segment and a bolt embedded in the pipe segment, and the small head end of the bolt is welded and fixed to the inner surface of the pre-embedded steel plate.

8. A temporary support structure for underground structure before opening a hole according to claim 7, characterized in that: Each pipe segment is provided with two rows of steel plate components above and below the opening area, and the embedded steel plates of the two rows of steel plate components on the same side of the opening area are welded and fixed to the upper and lower ends of the side support beam.

9. A temporary support structure for underground structure before opening a hole according to claim 8, characterized in that: Each row of steel plate components on each pipe section is arranged with 3-4 steel plate components at intervals and are arranged symmetrically on the pipe section.

10. A temporary support structure for underground structure before opening a hole according to claim 9, characterized in that: The embedded steel plate is provided with four bolts, and the four bolts are arranged at the vertices of a rectangle.

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