Supporting box group for open excavation of municipal pipe network

Abstract

The utility model discloses a support box group for open excavation of a municipal pipe network, which comprises a pushing support box and a soil retaining support box, the pushing support box and the soil retaining support box cooperate with each other, and the width of the pushing support box and the width of the soil retaining support box along the width direction of a groove are telescopic and adjustable, so that the pushing support box and the soil retaining support box are used for oppositely jacking two groove walls of the groove to support the groove. The pushing supporting box is further used for installing and supporting a to-be-installed pipeline in the longitudinal direction of trench excavation and stretching out and drawing back in the longitudinal direction of trench excavation so as to push the soil retaining supporting box arranged behind, so that the soil retaining supporting box abuts against a backfill layer located behind the soil retaining supporting box and formed by the backfill trench, and the soil retaining supporting box is further used for supporting the backfill layer. And earthwork backfilling is synchronously carried out in the soil retaining supporting box while a groove in front of the pushing supporting box is excavated. When the novel support box group is used, excavation, support, pipeline installation and backfilling can form synchronous line production, so that the construction period and the construction efficiency are guaranteed, the construction cost is effectively reduced, the construction safety is high, and the backfilling construction quality is good.

Description

Technical Field

[0001] This utility model relates to the technical fields of trench excavation and support, pipeline installation and backfilling construction, and in particular, to a support box assembly for open excavation of municipal pipeline networks. Background Technology

[0002] With the continuous acceleration of underground pipeline network renovation across various regions and the widespread application of various new technologies and methods, the technology for underground pipeline network renovation is constantly being upgraded, and the market size is further expanding. Commonly used methods for municipal pipeline network construction include pipe jacking and open-cut methods. However, the renovation of municipal pipelines in cities is limited by various reasons. Since pipeline construction is often located in urban villages, old urban areas, and urban-rural fringe areas, the construction site is small, and there are problems such as the intricate existing municipal pipelines and complex traffic environment. Moreover, urban pipeline network renovation usually involves small-diameter pipes and shallow soil cover. Therefore, the cost of using the pipe jacking method is much higher than that of the open-cut method. Furthermore, the trench excavation process for pipeline construction is increasingly affected by traffic, construction site conditions, and existing pipelines, resulting in limited excavation sites, untimely foundation pit support leading to pipeline damage, and high construction safety risks.

[0003] Typically, trench excavation using the slope method requires a sufficiently large construction site, which also increases the amount of excavation and backfilling work; or using sheet pile support is prone to conflict with existing pipelines, increasing the amount of pipeline protection and relocation work; when conventional support boxes are used instead of sheet pile support, workers need to go down into the well to work, the construction space is narrow, and the cross-operation between upper and lower levels increases safety risks, and it cannot form a continuous operation with trench backfilling, resulting in a long construction period.

[0004] Therefore, finding a suitable support box for open-cut municipal pipelines has become a common challenge in the industry. Utility Model Content

[0005] This utility model provides a support box assembly for open-cut municipal pipeline networks to solve the technical problems of high construction safety risks, inability to form continuous operations, resulting in long construction cycles and low construction efficiency in existing construction.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A support box assembly for open-cut municipal pipelines includes: a jacking support box and a retaining support box, which are arranged sequentially and cooperate with each other along the trench excavation direction. The widths of both the jacking support box and the retaining support box are adjustable along the width of the trench to support the two sides of the trench. The jacking support box is also used to support the pipeline to be installed along the longitudinal direction of the trench excavation, and to extend and retract along the longitudinal direction of the trench excavation to jack the retaining support box set behind it, so that the retaining support box is pressed against the backfill layer formed by the backfill trench behind it. The retaining support box is also used to support the backfill layer and to simultaneously carry out earthwork backfilling inside the retaining support box while the trench is being excavated in front of the jacking support box.

[0008] Furthermore, the jacking support box includes two first support plates arranged opposite each other along the width of the trench, a first transverse support disposed on the inner wall of one of the first support plates, pipe supports disposed on the inner walls of the two first support plates and arranged opposite each other, and a jacking cylinder disposed on the inner wall of at least one of the first support plates; the first transverse support is telescopically arranged along the width of the trench to brace the two first support plates against the two trench walls; the pipe supports are telescopically arranged along the width of the trench to cooperate with another set of corresponding pipe supports to clamp and fix the pipes; the jacking cylinder is telescopically arranged along the longitudinal extension of the trench to jack the retaining support box located behind.

[0009] Furthermore, the first support plate includes a first raised section and a first standard section arranged in plate shape, and a first connecting member that serves to connect them; the first raised section and the first standard section are arranged sequentially up and down along the depth direction of the trench; the first connecting member is disposed between the first raised section and the first standard section for detachably fixing the two.

[0010] Furthermore, the inner sidewalls of the two first support plates are also provided with first sliding grooves extending along the depth direction of the groove; the first lateral support includes a first inner support and a first outer support that are fitted together, a support jack located inside the first outer support and tightened between the inner end face of the first outer support and the outer end face of the first inner support, and a first support slider fixedly connected to the end of the first outer support; the first support slider is slidably connected to the first sliding groove on the first first support plate and fixed by fasteners; the first inner support is used to extend relative to the first outer support and abut against the first sliding groove on the second first support plate under the action of the support jack.

[0011] Furthermore, the inner walls of the two first support plates are also provided with corresponding slides extending along the depth of the groove, and each end of the slide is provided with an adjusting jack that extends and retracts along the extension direction of the slide; the ends of the pipe supports are slidably connected to the corresponding slide grooves and are located between the upper and lower sets of adjusting jacks.

[0012] Furthermore, the pipe bracing includes a bracing slider that is slidably connected to the slide rail, a first support section and a second support section that are axially fitted together, a rotating component that is rotatably connected to the extended end of the second support section, and a clamping block connected to the rotating component; the end of the first support section is fixedly connected to the bracing slider.

[0013] Furthermore, the jacking support box also includes a stroke extender for increasing the stroke of the jacking cylinder, which is used to brace between the jacking cylinder and the retaining support box.

[0014] Furthermore, the retaining support box includes three second support plates that form the three sides of the square box body, and a second transverse support set on the inner wall of one of the second support plates in the trench width direction; the second transverse support is extended and retracted in the trench width direction to tighten the retaining support box relative to each other in the trench width direction.

[0015] Furthermore, the second support plate includes a plate-shaped second heightening section and a second standard section, and a second connecting member for connecting them; the second heightening section and the second standard section are arranged vertically along the depth direction of the trench; the second connecting member is disposed between the second heightening section and the second standard section for detachably fixing them; the inner sidewalls of the two second support plates in the width direction are also provided with corresponding second sliding grooves extending along the depth direction of the trench; the second lateral support includes a second inner support and a second outer support disposed in an inner and outer sleeve, a support jack located inside the second outer support and tightened between the inner end face of the second outer support and the outer end face of the second inner support, and a second support slider fixedly connected to the end of the second outer support; the second support slider is slidably connected to the second sliding groove on the first second support plate and fixed by fasteners; the second inner support is used to extend relative to the second outer support and abut against the second sliding groove on the second second support plate under the action of the support jack.

[0016] Furthermore, the retaining support box also includes a jacking support rib connected to the outer wall of the second support plate arranged in the direction of vertical trench width, and a yoke rib connected to the junction of two vertically intersecting second support plates; the jacking support rib is used to abut against the end of the jacking cylinder.

[0017] This utility model has the following beneficial effects:

[0018] When the support box assembly of this utility model is applied to open-cut construction, such as Figure 9-10As shown, since the widths of both the jacking support box and the retaining support box are adjustable along the trench width direction, their widths can be adjusted so that they respectively abut against the two trench walls along the trench width direction, thereby providing excavation support for the trench. Furthermore, during the layered excavation of the first section of the trench, the jacking support box can be pressed in step by step to simultaneously support the excavated trench, solving the support problem during trench excavation. Simultaneously, the jacking support box can also be installed along the longitudinal direction of the trench excavation to support the pipeline to be installed, for positioning and support of the pipeline, improving pipeline construction efficiency. To ensure the stability of the construction, the jacking support box also extends and retracts longitudinally along the trench excavation to jack the retaining support box set behind it. This allows the retaining support box to press tightly against the backfill layer formed by the backfill trench behind it. This not only allows the retaining support box to support the backfill layer and improve the stability of the backfill, but also allows for simultaneous backfilling of soil within the retaining support box while the trench in front of the jacking support box is being excavated. This enables excavation, support, pipeline installation, and backfilling to form a synchronized, continuous operation, thereby ensuring the construction period and efficiency, effectively reducing construction costs, while also ensuring high construction safety and good backfill quality.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the spatial structure of the top-push support box according to a preferred embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 Front view structural diagram;

[0023] Figure 3 yes Figure 1 A top-view structural diagram;

[0024] Figure 4 yes Figure 1 A schematic diagram of the structure viewed from below;

[0025] Figure 5 This is a schematic diagram of the spatial structure of the retaining support box according to a preferred embodiment of the present utility model;

[0026] Figure 6 yes Figure 5 A schematic diagram of the rear-view main view structure;

[0027] Figure 7yes Figure 5 A top-view structural diagram;

[0028] Figure 8 yes Figure 5 A schematic diagram of the structure viewed from below;

[0029] Figure 9 This is a top view of the application status of the support box assembly for open-cut municipal pipelines according to a preferred embodiment of this utility model.

[0030] Figure 10 This is a front view of the engineering application status of the support box assembly for open-cut municipal pipeline network according to a preferred embodiment of this utility model.

[0031] Legend:

[0032] 1. Jacking support box; 11. First heightening section; 12. First standard section; 13. First connecting piece;

[0033] 14. First lateral support; 141. First outer support; 142. First inner support; 143. First support slider;

[0034] 15. Pipe support; 151. First section support; 152. Second section support; 153. Rotating component; 154. Support slider; 155. Clamping block;

[0035] 16. Push cylinder; 17. First slide groove; 18. Slide rail; 19. Adjusting jack;

[0036] 2. Retaining support box; 21. Second heightened section; 22. Second standard section; 23. Second connecting piece;

[0037] 24. Second lateral support; 241. Second outer support; 242. Second inner support; 243. Second support slider;

[0038] 25. Second slide groove; 26. Push support rib; 27. Armpit corner rib;

[0039] 3. Backfill layer; 5. Pipeline. Detailed Implementation

[0040] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0041] Reference Figure 1 , Figure 5 , Figure 9-10A preferred embodiment of this utility model provides a support box assembly for open-cut municipal pipeline networks, comprising: a jacking support box 1 and a retaining support box 2, which are arranged sequentially and cooperate with each other along the trench excavation direction. The widths of both the jacking support box 1 and the retaining support box 2 are adjustable along the trench width direction to relatively press against the two trench walls, thereby supporting the trench. The jacking support box 1 is also used to support the pipe 5 to be installed along the longitudinal direction of the trench excavation, and to extend and retract along the longitudinal direction of the trench excavation to jack against the retaining support box 2 arranged behind it, so that the retaining support box 2 presses against the backfill layer 3 formed by the backfill trench behind it, so that the retaining support box 2 also supports the backfill layer 3, and is used to simultaneously carry out earthwork backfilling inside the retaining support box 2 while the trench is being excavated in front of the jacking support box 1.

[0042] When the support box assembly of this utility model is applied to open-cut construction, such as Figure 9-10 As shown, since the widths of both the jacking support box 1 and the retaining support box 2 are adjustable along the width direction of the trench, their widths can be adjusted so that they respectively abut against the two trench walls along the width direction of the trench, thereby providing excavation support for the trench. Furthermore, during the layered excavation of the first section of the trench, the jacking support box 1 can be pressed in step by step to simultaneously support the excavated trench, solving the support problem during trench excavation. Simultaneously, the jacking support box 1 can also be installed along the longitudinal direction of the trench excavation to support the pipeline 5 to be installed, thereby positioning and supporting the pipeline 5 and improving its height. To ensure construction stability, the jacking support box 1 extends and retracts longitudinally along the trench excavation to jack the retaining support box 2 set behind it. This allows the retaining support box 2 to press tightly against the backfill layer 3 formed by the backfill trench behind it. This not only supports the backfill layer 3 and improves the stability of the backfill, but also allows for simultaneous backfilling within the retaining support box 2 while the trench in front of the jacking support box 1 is being excavated. This enables excavation, support, pipeline installation, and backfilling to be carried out in a synchronized, continuous operation, thus ensuring construction period and efficiency, effectively reducing construction costs, while also ensuring high construction safety and good backfill quality.

[0043] Optionally, such as Figure 1-4As shown, the jacking support box 1 includes two first support plates arranged opposite each other along the width of the trench, a first transverse support 14 disposed on the inner wall of one of the first support plates, pipe supports 15 disposed on the inner walls of the two first support plates and arranged opposite each other, and a jacking cylinder 16 disposed on the inner wall of at least one of the first support plates. The first transverse support 14 is telescopically arranged along the width of the trench to tighten the two first support plates against the two trench walls. The pipe supports 15 are telescopically arranged along the width of the trench to cooperate with another set of corresponding pipe supports 15 to clamp and fix the pipes 5. The jacking cylinder 16 is telescopically arranged along the longitudinal direction of the trench to jack the retaining support box 2 located behind it. In this optional scheme, each component of the jacking support box 1 is processed from formed steel components, thereby making the jacking support box 1 have high overall rigidity and good support stability.

[0044] In this optional solution, such as Figure 1 As shown, the first support plate includes a first raised section 11 and a first standard section 12 arranged in a plate shape, and a first connecting member 13 for connecting them. The first raised section 11 and the first standard section 12 are arranged vertically along the depth direction of the trench. The first connecting member 13 is disposed between the first raised section 11 and the first standard section 12 for detachably fixing the two. In this optional embodiment, the first connecting member 13 includes a connecting strip with an "H" shaped cross-section, and a connecting bolt or connecting screw for connecting; the upper and lower long grooves of the connecting strip respectively engage the bottom end of the first raised section 11 and the top end of the first standard section 12; after the connecting bolt or connecting screw passes through the connecting strip, the connecting strip connects and fixes the first raised section 11 and the first standard section 12 respectively.

[0045] In this optional solution, such as Figure 1 As shown, the inner walls of the two first support plates are also provided with first sliding grooves 17 extending along the depth direction of the groove. Figure 2 As shown, the first lateral support 14 includes an inner support 142 and an outer support 141 fitted together, a support jack located inside the outer support 141 and tightened between the inner end face of the outer support 141 and the outer end face of the inner support 142, and a first support slider 143 fixedly connected to the end of the outer support 141. The first support slider 143 is slidably connected to the first groove 17 on the first first support plate and fixed by fasteners. The first inner support 142 is used to extend relative to the first outer support 141 and abut against the first groove 17 on the second first support plate under the action of the support jack. In this optional solution, such as Figure 1As shown, the first slide groove 17 is a concave component, welded to the first support plate, used for fixing the first transverse support 14 and adjusting its up and down sliding, and also serves to reinforce the first support plate; the first support slider 143 is a mountain-shaped component, connected to the support for the up and down sliding of the first slide groove 17, and after adjustment, the fixed end is bolted to one side of the first slide groove 17.

[0046] In this optional solution, such as Figure 1 As shown, the inner walls of the two first support plates are also provided with corresponding slides 18 extending along the depth of the groove. Each end of the slide 18 is provided with an adjusting jack 19 that extends and retracts along the extension direction of the slide 18. The end of the pipe support 15 is slidably connected to the corresponding groove and is located between the upper and lower sets of adjusting jacks 19. In this optional scheme, the slide 18 also serves to reinforce the first support plates; the two sets of adjusting jacks 19 are used to limit the vertical height of the pipe support 15 located within the slide 18.

[0047] In this optional solution, such as Figure 2 As shown, the pipe support 15 includes a support slider 154 slidably connected to the slide rail 18, a first support section 151 and a second support section 152 axially fitted together, a rotating component 153 rotatably connected to the extended end of the second-stage support, and a clamping block 155 connected to the rotating component 153. The end of the first support section 151 is fixedly connected to the support slider 154. In this optional embodiment, the rotating component 153 is a conventional rotatable component, used to adjust the circumferential angle of the connected clamping block 155, thereby facilitating better clamping of the pipe 5 by the clamping block 155.

[0048] In this optional solution, the jacking support box 1 also includes a stroke extender for increasing the stroke of the jacking cylinder 16. The stroke extender is used to brace between the jacking cylinder 16 and the retaining support box 2 to extend the stroke of the jacking cylinder 16.

[0049] Optionally, such as Figure 5-8 As shown, the retaining support box 2 includes three second support plates forming the three sides of the square box body, and a second transverse support 24 installed on the inner wall of one of the second support plates in the trench width direction. The second transverse support 24 is telescopically arranged along the width direction of the trench to tighten the retaining support box 2 relative to each other in the trench width direction. In this optional scheme, each component of the retaining support box 2 is processed from formed steel components, thereby making the retaining support box 2 have high overall rigidity and good support stability. Moreover, the structure of the retaining support box 2 is relatively simple, and the strength and construction of the components are basically the same as those of the jacking support box 1. The length is slightly smaller than that of the jacking support box 1, and it is mainly used for earthwork backfilling and providing jacking reaction force.

[0050] In this optional solution, such as Figure 5As shown, the second support plate includes a plate-shaped second extension section 21 and a second standard section 22, and a second connecting member 23 for connecting them. The second extension section 21 and the second standard section 22 are arranged sequentially vertically along the depth direction of the trench. The second connecting member 23 is disposed between the second extension section 21 and the second standard section 22 for detachably fixing the two. In this optional embodiment, the second connecting member 23 includes a connecting strip with an "H"-shaped cross-section, and a connecting bolt or connecting screw for connecting; the upper and lower long grooves of the connecting strip respectively engage the bottom end of the second extension section 21 and the top end of the second standard section 22; after the connecting bolt or connecting screw passes through the connecting strip, it connects and fixes the second extension section 21 and the second standard section 22 respectively.

[0051] In this optional solution, such as Figure 5 and Figure 6 As shown, the inner sidewalls of the two second support plates in the width direction are also provided with second sliding grooves 25 extending along the groove depth direction. The second transverse support 24 includes a second inner support 242 and a second outer support 241 that are fitted together, a support jack located inside the second outer support 241 and tightened between the inner end face of the second outer support 241 and the outer end face of the second inner support 242, and a second support slider 243 fixedly connected to the end of the second outer support 241. The second support slider 243 is slidably connected to the second sliding groove 25 on the first second support plate and fixed by fasteners. The second inner support 242 is used to extend relative to the second outer support 241 and abut against the second sliding groove 25 on the second second support plate under the action of the support jack. In this optional solution, such as Figure 1 As shown, the second slide groove 25 is a concave component, welded to the second support plate, used for fixing the second transverse support 24 and adjusting its up and down sliding, and also serves to reinforce the second support plate; the second support slider 243 is a mountain-shaped component, connected to the support for the up and down sliding of the second slide groove 25, and after adjustment, the fixed end is bolted to one side of the second slide groove 25.

[0052] Preferably, such as Figure 5 As shown, the retaining support box 2 also includes a jacking support rib 26 connected to the outer wall of the second support plate arranged vertically in the trench width direction, and a haunch corner rib 27 connected to the connection of two perpendicularly intersecting second support plates. The jacking support rib 26 is used to abut against the end of the jacking cylinder 16. In this preferred embodiment, a triangular haunch corner rib 27 is added at the connection of two adjacent second support plates to strengthen the support capacity of the second support plate and also to ensure compaction at the corner of the backfill. The jacking support rib 26 is provided on the outer front end of the retaining support box 2 at the position opposite to the jacking cylinder 16. It is composed of double-jointed I-beams welded together. The jacking support rib 26 can be used to provide jacking reaction force and also to reinforce the overall panel.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A support box assembly for open-cut municipal pipeline networks, characterized in that, include: The jacking support box (1) and the retaining support box (2) are installed sequentially and cooperate with each other along the trench excavation direction. The width of the jacking support box (1) and the retaining support box (2) is adjustable along the width of the trench so as to relatively press against the two sides of the trench wall to support the trench. The jacking support box (1) is also used to support the pipe (5) to be installed in the longitudinal direction of the trench excavation, and to jack the retaining support box (2) set behind it in the longitudinal direction of the trench excavation, so that the retaining support box (2) is pressed against the backfill layer (3) formed by the backfill trench behind it, so that the retaining support box (2) is also used to support the backfill layer (3), and to carry out earthwork backfilling in the retaining support box (2) at the same time as the trench is excavated in front of the jacking support box (1).

2. The support box assembly for open-cut municipal pipelines according to claim 1, characterized in that, The jacking support box (1) includes two first support plates arranged opposite each other along the width of the trench, a first transverse support (14) set on the inner side wall of one of the first support plates, a pipe brace (15) set on the inner side walls of the two first support plates and arranged opposite each other, and a jacking cylinder (16) set on the inner side wall of at least one first support plate. The first transverse support (14) is telescopically provided along the width of the trench to brace the two first support plates against the two trench walls. The pipe bracing (15) is extended and retracted along the width of the trench to cooperate with another set of pipe bracing (15) to clamp and fix the pipe (5) relatively. The jacking cylinder (16) is longitudinally telescopically extended along the trench to jack up the retaining support box (2) located behind it.

3. The support box assembly for open-cut municipal pipelines according to claim 2, characterized in that, The first support plate includes a first heightening section (11) and a first standard section (12) arranged in plate shape, and a first connecting member (13) that serves as a connection; The first heightened section (11) and the first standard section (12) are arranged sequentially up and down along the depth direction of the trench; A first connector (13) is disposed between the first heightening section (11) and the first standard section (12) for detachably fixing the two together.

4. The support box assembly for open-cut municipal pipelines according to claim 2, characterized in that, The inner walls of the two first support plates are also provided with first sliding grooves (17) extending along the depth of the groove; The first lateral support (14) includes a first inner support (142) and a first outer support (141) that are arranged in an inner and outer sleeve, a support jack located inside the first outer support (141) and tightened between the inner end face of the first outer support (141) and the outer end face of the first inner support (142), and a first support slider (143) that is fixedly connected to the end of the first outer support (141). The first support slider (143) is slidably connected to the first groove (17) on the first first support plate and is fixed by fasteners; The first inner support (142) is used to extend relative to the first outer support (141) and abut against the first groove (17) on the second first support plate under the action of the support jack.

5. The support box assembly for open-cut municipal pipelines according to claim 2, characterized in that, The inner walls of the two first support plates are also provided with corresponding slides (18) extending along the depth of the groove, and at both ends of the slides (18) are adjustable jacks (19) that extend and retract along the extension direction of the slides (18). The end of the pipe support (15) is slidably connected to the corresponding groove and is located between the upper and lower sets of adjusting jacks (19).

6. The support box assembly for open-cut municipal pipelines according to claim 5, characterized in that, The pipe bracing (15) includes a bracing slider (154) that is slidably connected to the slide (18), a first section support (151) and a second section support (152) that are axially fitted together, a rotating component (153) that is rotatably connected to the extended end of the second section support, and a clamping block (155) that is connected to the rotating component (153). The end of the first support (151) is fixedly connected to the counter-support slider (154).

7. The support box assembly for open-cut municipal pipelines according to claim 2, characterized in that, The jacking support box (1) also includes a stroke extender for increasing the stroke of the jacking cylinder (16), which is used to brace between the jacking cylinder (16) and the retaining support box (2).

8. The support box assembly for open-cut municipal pipelines according to claim 1, characterized in that, The retaining support box (2) includes three second support plates for forming the three sides of the square box, and a second transverse support (24) set on the inner wall of one of the second support plates in the trench width direction; The second transverse support (24) is extended and retracted along the width of the trench to tighten the retaining support box (2) relative to each other along the width of the trench.

9. The support box assembly for open-cut municipal pipelines according to claim 8, characterized in that, The second support plate includes a second raised section (21) and a second standard section (22) arranged in a plate shape, and a second connector (23) that serves as a connection; the second raised section (21) and the second standard section (22) are arranged vertically along the depth direction of the groove; the second connector (23) is arranged between the second raised section (21) and the second standard section (22) for detachably fixing the two; The inner sidewalls of the two second support plates in the width direction are also provided with a second sliding groove (25) extending along the depth direction of the groove; the second transverse support (24) includes a second inner support (242) and a second outer support (241) that are fitted together, a support jack located inside the second outer support (241) and tightened between the inner end face of the second outer support (241) and the outer end face of the second inner support (242), and a second support slider (243) that is fixedly connected to the end of the second outer support (241); the second support slider (243) is slidably connected to the second sliding groove (25) on the first second support plate and fixed by fasteners; the second inner support (242) is used to extend relative to the second outer support (241) and abut against the second sliding groove (25) on the second second support plate under the action of the support jack.

10. The support box assembly for open-cut municipal pipelines according to claim 8, characterized in that, The retaining support box (2) also includes a push support rib (26) connected to the outer wall of the second support plate arranged in the direction of vertical trench width, and a rib (27) connected to the junction of two vertically intersecting second support plates. The push support rib (26) is used to abut against the end of the push cylinder (16).

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