Municipal road foundation pit supporting structure

Abstract

The invention relates to a municipal road foundation pit supporting structure, and belongs to the technical field of foundation pit construction protection, the municipal road foundation pit supporting structure comprises two breast boards and a supporting assembly arranged between the breast boards, the supporting assembly comprises two lower supporting beams which are obliquely and downwards arranged between the two breast boards, and one ends of the two lower supporting beams are fixedly connected with the bottoms of the inner sides of the breast boards; the two upper supporting beams are horizontally arranged between the two breast boards, one ends of the two upper supporting beams are fixedly connected with the tops of the inner sides of the breast boards, and the connecting mechanism is connected to the two upper supporting beams. The lower supporting beams and the upper supporting beams can support the breast boards on the two sides, and the two lower supporting beams are mutually independent to avoid shear stress concentration; the two upper supporting beams are connected through the connecting mechanism, so that the upper supporting beams pull the tops of the two soil retaining plates inwards, the soil pressure of the foundation pit on the lower supporting beams and the upper supporting beams is balanced, the situation that the supporting assembly is broken due to uneven stress is avoided, and the stability of the municipal road foundation pit supporting structure is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of foundation pit construction protection, and in particular relates to a municipal road foundation pit support structure. Background Art

[0002] Since the soil under urban roads is relatively soft, municipal maintenance personnel need to support the pipeline foundation pit when working in it to prevent the collapse of the pipeline foundation pit and the danger to personnel and pipelines. Existing foundation pit support methods include slope support, strut support, underground continuous wall support, sheet pile support, concrete spray anchor support, etc. However, urban roads are mostly surrounded by buildings or other facilities, and during construction, it is necessary to minimize the impact on traffic and surrounding buildings. The width of the pipeline foundation pit on municipal roads is generally narrow. Among them, slope support, underground continuous wall support, and sheet pile support have certain requirements for the width of the foundation pit. At the same time, the pipelines under municipal roads are complex, and concrete spray anchor support requires driving anchor rods into the side walls of the foundation pit, which is easy to damage other pipeline facilities. Therefore, the pipeline foundation pits on existing municipal roads generally use strut support. Support plates are placed vertically on the inner walls on both sides of the foundation pit, and then struts are used to support the two support plates, thereby supporting the pipeline foundation pit.

[0003] When municipal workers remove old pipes and install new ones at the bottom of the pipeline foundation pit, they often place braces on the upper side between two support plates to prevent them from interfering with their work. However, the earth pressure on the pit sidewalls increases with depth. Vehicles passing through the pit cause the soil to vibrate, further increasing the earth pressure at the bottom of the pit. This in turn causes the pit bottom to shift inward, tilting the support plates and destabilizing the brace support structure.

[0004] At present, in order to improve the stability of the support for pipeline foundation pits on municipal roads, the existing technology mostly uses X-shaped brackets to replace the struts between the two support plates. The ends of the X-shaped brackets are respectively connected to the upper and lower sides of the support plates, thereby supporting the upper and lower sides of the pipeline foundation pit at the same time, and preventing the support plates from tilting and causing the support structure to become unstable. However, during the support process, the X-shaped brackets broke around their hinges. After research and analysis, it was found that since the soil pressure on the upper and lower parts of the X-shaped brackets was transmitted through the hinges, there was a large shear stress at the hinges of the X-shaped brackets. The soil pressure on the two arms on the lower side of the X-shaped bracket was greater than the soil pressure on the two arms on the upper side. The uneven force on the hinges of the X-shaped brackets made it easy to break, resulting in limited improvement in the stability of the pipeline foundation pit support on municipal roads. Summary of the Invention

[0005] In view of this, the present invention provides a municipal road foundation pit support structure to address the deficiencies in the prior art. The present invention improves the stability of the municipal road foundation pit support by balancing the soil pressure at the bottom and top of the foundation pit on the support structure.

[0006] The two supporting plates are connected to each other to form a vertical cam, and the two supporting plates are connected to each other to form a vertical cam.

[0007] Preferably, the connecting mechanism includes: an M-shaped connecting piece and a fastener, the M-shaped connecting piece is arranged on two upper support beams, the side of the upper support beam close to the lower support beam is located in the through groove of the M-shaped connecting piece, and the fastener passes through the M-shaped connecting piece and is connected to the upper support beam.

[0008] Preferably, it also includes: a U-shaped connector, the U-shaped connector is vertically upwardly sleeved on the M-shaped connector, the M-shaped connector and the lower support beam are in contact with the inner wall of the U-shaped connector, and the fastener passes through the U-shaped connector and is connected thereto.

[0009] Preferably, a mounting groove is horizontally opened at the bottom of the upper support beam, and the mounting groove is parallel to the through groove of the M-shaped connecting piece. The top of the lower support beam has a horizontal section, which extends into the mounting groove and abuts against its inner wall. The bottom of the horizontal section abuts against the U-shaped connecting piece, and the fastener extends into the mounting groove and is fixedly connected to the lower support beam.

[0010] Preferably, a limiting column is vertically provided in the U-shaped connector, one end of the limiting column is fixedly connected to the U-shaped connector, a countersunk hole is vertically opened at the bottom of the horizontal section, and the other end of the limiting column extends into the countersunk hole and is cooperatively connected therewith.

[0011] Preferably, the upper support beam is provided with a guide groove horizontally on one side of the mounting groove close to the inner wall of the U-shaped connector, the guide groove is connected to the mounting groove, and the fastener passes through the guide groove and is slidably connected thereto.

[0012] Preferably, a plurality of columns are fixed vertically continuously along the length direction on the side wall of the M-shaped connector, and a plurality of limiting grooves are opened vertically continuously along the length direction on one side of the upper support beam, and the columns are embedded in the limiting grooves and connected therewith.

[0013] Preferably, a plurality of reinforcing ribs are provided horizontally between the retaining plate and the lower support beam provided thereon at equal vertical intervals, one end of the reinforcing rib is connected to the retaining plate, and the other end is connected to the lower support beam.

[0014] Preferably, a stabilizing bar is connected between the lower support beam and the upper support beam located on the same retaining plate.

[0015] Compared with the prior art, the present invention provides a municipal road foundation pit support structure, which can realize the support of the retaining plates on both sides by the lower support beam and the upper support beam of the support assembly through the use of two retaining plates in conjunction with the lower support beam and the upper support beam of the support assembly. The two lower support beams are independent of each other to avoid shear stress concentration, and the two upper support beams are connected by a connecting mechanism, so that the upper support beam pulls the tops of the two retaining plates inward, thereby balancing the soil pressure of the bottom and top of the foundation pit on the lower support beam and the upper support beam, avoiding the support assembly from being broken due to uneven force, and improving the stability of the municipal road foundation pit support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of the support structure of the present invention; Figure 2 is a top view of the support structure of the present invention; Figure 3 This invention Figure 2 AA section view in; Figure 4 This invention Figure 2 BB cross-sectional view in; Figure 5 This invention Figure 2 The CC section view in the figure; Figure 6 This is a schematic diagram of the installation of the support structure of the present invention; Figure 7 is a front view of the upper support beam of the present invention; Figure 8 is a top view of the upper support beam of the present invention; Figure 9 is a front view of the M-shaped connector of the present invention; Figure 10 is a bottom view of the M-shaped connector of the present invention; Figure 11 It is a top view of the U-shaped connector of the present invention.

[0017] Explanation of the accompanying reference numerals: 1. retaining plate; 2. lower support beam; 3. upper support beam; 4. M-shaped connector; 5. U-shaped connector; 6. stabilizer bar; 11. reinforcing rib; 12. clamp; 31. mounting groove; 32. guide groove; 33. limiting groove; 41. column; 42. slot; 51. limiting column. DETAILED DESCRIPTION

[0018] The present invention provides a municipal road foundation pit support structure, which is combined with Figures 1 to 11 The present invention is described with reference to a structural schematic diagram of FIG.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] Roads are a vital component of urban infrastructure, supporting the flow of traffic and serving as pathways for vehicles and pedestrians. Furthermore, the various pipelines and associated infrastructure buried beneath them are crucial components of urban infrastructure, ensuring the proper functioning of vital services such as water supply, drainage, electricity, communications, and gas. Burying pipelines beneath roads minimizes environmental impacts (such as storms and natural disasters) and the risk of vehicle collisions and damage. However, these pipelines can also deteriorate over time. Therefore, inspection wells are installed along roads, allowing municipal maintenance personnel to access these pipes. However, these wells can only repair minor damage to pipes. Long-distance pipe damage cannot be replaced through the wells by lowering a new pipe underground. Consequently, a foundation pit must be excavated above ground to replace the entire section of pipe.

[0021] Since the soil under urban roads is relatively soft, municipal maintenance personnel need to support the foundation pit to prevent the collapse of the foundation pit from causing danger to personnel and pipelines when replacing the pipes in the foundation pit. Existing foundation pit support methods include slope support, strut support, underground continuous wall support, sheet pile support, concrete spray anchor support, etc. However, urban roads are mostly surrounded by buildings or other facilities, and during construction, it is necessary to minimize the impact on traffic and surrounding buildings. The width of the foundation pit on municipal roads is generally narrow. Among them, slope support, underground continuous wall support, and sheet pile support have certain requirements for the width of the foundation pit. At the same time, the pipelines under municipal roads are complex, and concrete spray anchor support requires driving anchor rods into the side walls of the foundation pit, which is easy to damage other pipeline facilities. Therefore, the foundation pits on existing municipal roads generally use strut support. Support plates are placed vertically on the inner walls on both sides of the foundation pit, and then struts are used to support the two support plates, thereby supporting the foundation pit.

[0022] When municipal workers remove old pipes and install new ones at the bottom of the foundation pit, they often place braces on the upper side between two support plates to prevent them from interfering with their work. However, the earth pressure on the pit walls increases with depth. Vehicles passing through the pit cause the soil to vibrate, further increasing the earth pressure at the bottom of the pit. This in turn causes the pit bottom to shift inward, tilting the support plates and destabilizing the bracing support structure.

[0023] At present, in order to improve the stability of the support for pipeline foundation pits on municipal roads, the existing technology mostly uses X-shaped brackets to replace the struts between the two support plates. The ends of the X-shaped brackets are respectively connected to the upper and lower sides of the support plates, thereby supporting the upper and lower sides of the pipeline foundation pit at the same time, and preventing the support plates from tilting and causing the support structure to become unstable. However, during the support process, the X-shaped brackets broke around their hinges. After research and analysis, it was found that since the soil pressure on the upper and lower parts of the X-shaped brackets was transmitted through the hinges, there was a large shear stress at the hinges of the X-shaped brackets. The soil pressure on the two arms on the lower side of the X-shaped bracket was greater than the soil pressure on the two arms on the upper side. The uneven force on the hinges of the X-shaped brackets made it easy to break, resulting in limited improvement in the stability of the pipeline foundation pit support on municipal roads.

[0024] Based on the above problems, an embodiment of the present invention provides a municipal road foundation pit support structure, which can realize that the lower support beam and the upper support beam support the retaining plates on both sides. The two lower support beams do not need to be connected and are independent of each other to avoid the phenomenon of shear stress concentration. The connecting mechanism connects the two upper support beams, so that the upper support beam pulls the tops of the two retaining plates inward, thereby balancing the soil pressure of the bottom and top of the foundation pit on the lower support beam and the upper support beam, avoiding the situation where the support components are unevenly stressed and cause breakage, thereby improving the stability of the municipal road foundation pit support. At the same time, the horizontally arranged upper support beam directly supports or pulls the retaining plates, which can further improve the support for the retaining plates and the effect of balancing the upper and lower soil pressures.

[0025] In addition, in this embodiment, when the inclined lower support beam is used in conjunction with the horizontal upper support beam and the retaining plate to support the foundation pit, the distance between the two lower support beams can be increased. Compared with the existing X-shaped bracket, municipal personnel have more operating space to dismantle old pipes and install new pipes at the bottom of the foundation pit.

[0026] Figure 1 This is the front view of the support structure of this embodiment, refer to Figure 1The camming member 1 is a pair of parallel rods 2 arranged on the sidewalls of the two support rails 1 and 2, and the two support rails 2 are connected along the longitudinal direction of the camming frame 1 , so that the support rails 2 can extend out of the camming frame 1 and are located adjacent to the support rail 1 .

[0027] The municipal road foundation pit support structure disclosed in this embodiment can be assembled simultaneously with the foundation pit excavation. The two retaining plates 1 are placed vertically opposite each other using a lifting device, and the lower support beam 2 and the upper support beam 3 are fixedly connected to the two retaining plates 1 respectively. Then, the two upper support beams 3 are connected by a connecting mechanism. When the foundation pit on the municipal road or other narrow foundation pits are excavated, Figure 6 This is a schematic diagram of the support structure installation in this embodiment, refer to Figure 6 As shown, the entire support structure is hoisted into the foundation pit by a lifting device, and the two retaining plates 1 are respectively abutted against the inner walls on both sides of the width direction of the foundation pit, and the interconnected lower support beam 2 and upper support beam 3 separately support the upper and lower sides of the retaining plate 1, and at the same time, the two lower support beams 2 are separated to avoid the phenomenon of shear stress concentration. At the same time, the connecting mechanism connects the two upper support beams 3, so that the two upper support beams 3 pull the tops of the two retaining plates 1 inward, thereby balancing the soil pressure of the bottom and top of the foundation pit on the lower support beam 2 and the upper support beam 4, avoiding the upper support beam 3 and the lower support beam 2 of the support assembly from being subjected to uneven force and breaking, thereby enhancing the stability of the foundation pit support and ensuring the safety of people in the foundation pit.

[0028] In addition, when the space around the foundation pit is small and it is inconvenient to assemble the support structure, the foundation pit support structure in this embodiment can also be assembled in the excavated foundation pit. The two retaining plates 1 are hoisted into the foundation pit through lifting equipment, and temporary supports are used to ensure that the two retaining plates 1 are in contact with the pit wall of the foundation pit, and then the support assembly is hoisted into the foundation pit for connection.

[0029] In this embodiment, countersunk holes are horizontally opened on the upper and lower sides of the retaining plate 1, and the upper support beam 3 and the lower support beam 2 are inserted into the countersunk holes. At the same time, the upper support beam 3 and the lower support beam 2 are provided with connecting flanges on the side close to the retaining plate 1, and the connecting flanges are fixedly connected to the retaining plate 1 by fasteners.

[0030] Figure 2 This is a top view of the support structure of this embodiment, refer to Figure 2 As shown, as a further optimization solution, the connecting mechanism in this embodiment includes: an M-shaped connecting member 4 and a fastener. The M-shaped connecting member 4 is arranged on the two upper support beams 3, and the side of the upper support beam 3 close to the lower support beam 2 is located in the through groove of the M-shaped connecting member 4. The fastener passes through the M-shaped connecting member 4 and is connected to the upper support beam 3.

[0031] In this embodiment, a specific composition of a connecting mechanism is provided, in which the distal ends of the two upper support beams 3 are located in the through grooves of the M-shaped connecting piece 4. When the two upper support beams 3 are connected by fasteners passing through the M-shaped connecting piece 4, not only the stability of the connection between the two upper support beams 3 is improved, but also the pulling forces of the two upper support beams 3 on the retaining plate 1 remain parallel to each other, so that the two upper support beams 3 can directly balance the soil pressure on the retaining plate 1 above and below, thereby further improving the stability of the foundation pit support.

[0032] In the above embodiment, the M-shaped connector 4 is used to prevent the two upper support beams 3 from shaking in the length direction of the foundation pit, thereby ensuring the overall stability of the support structure.

[0033] As a further optimization solution, this embodiment also includes: a U-shaped connector 5, which is vertically upwardly sleeved on the M-shaped connector 4, the M-shaped connector 4 and the lower support beam 2 are in contact with the inner wall of the U-shaped connector 5, and the fastener passes through the U-shaped connector 5 and is connected thereto.

[0034] In this embodiment, a U-shaped connector 5 is installed under the M-shaped connector 4, and a fastener is used to pass through the U-shaped connector 5 to wrap and tighten the M-shaped connector 4, further enhancing the stability of the connection between the two upper support beams 3 by the M-shaped connector 4 and preventing the two upper support beams 3 from shaking in the length direction of the foundation pit. At the same time, the connection between the upper support beam 3 and the lower support beam 2 is located inside the M-shaped connector 4 and the U-shaped connector 5, and the M-shaped connector 4 and the U-shaped connector 5 are used to enhance the stability of the connection between the upper support beam 3 and the lower support beam 2.

[0035] Figure 9 This is a front view of the M-shaped connector of this embodiment, referring to Figure 9As shown, in the above embodiment, there are card grooves 42 on the outer walls on both sides of the M-shaped connector 4. When the U-shaped connector 5 is mounted on the M-shaped connector 4 from the bottom to the top, the two sides of the opening of the U-shaped connector 5 are embedded in the card grooves 42 and connected with them. This not only improves the effect of the U-shaped connector 5 holding the M-shaped connector 4 tightly, but also uses the card grooves 42 to position the U-shaped connector 5, so that the fasteners can smoothly pass through the connecting holes on the U-shaped connector 5 and the M-shaped connector 4, thereby avoiding the connection holes on the U-shaped connector 5 and the M-shaped connector 4 being too large to reduce the stability of the support structure. It also makes it convenient for construction personnel to assemble and connect the support structure.

[0036] Figure 3 This is the AA cross-sectional view of the support structure of this embodiment, refer to Figure 3 As shown, as a further optimization scheme, in this embodiment, a mounting groove 31 is horizontally opened at the bottom of the upper support beam 3, and the mounting groove 31 is parallel to the through groove of the M-shaped connecting member 4. The top of the lower support beam 2 has a horizontal section, which extends into the mounting groove 31 and abuts against its inner wall, and the bottom of the horizontal section abuts against the U-shaped connecting member 5, and the fastener extends into the mounting groove 31 and is fixedly connected to the lower support beam 2.

[0037] In this embodiment, the mounting groove 31 at the bottom of the upper support beam 3 is used to allow the horizontal section at the top of the lower support beam 2 to be inserted into the mounting groove 31 and connected to the upper support beam 3, so that the soil pressure at the bottom of the foundation pit on the retaining plate 1 is transmitted to the top of the retaining plate 1 on the other side by means of the lower support beam 2 and the upper support beam 3, so that the force is transmitted in a direction perpendicular to the retaining plate 1, so that the soil pressure on the upper and lower sides of the retaining plate 1, the supporting force of the lower support beam 2 and the upper support beam 3, and the pulling force of the two upper support beams 3 are all close to the horizontal direction, thereby reducing the shear stress in the support structure and further improving the stability of the municipal road foundation pit support structure.

[0038] In the above embodiment, when the mounting groove 31 at the bottom of the upper support beam 3 is connected to the horizontal section at the top of the lower support beam 2, the continuity of the overall support of the upper support beam 3 and the lower support beam 2 can be improved, so that the forces on the upper and lower sides of the retaining plate 1 are transmitted on the same straight line. At the same time, the cooperation of the M-shaped connector 4 and the U-shaped connector 5 can also enhance the connection strength of the upper support beam 3 and the lower support beam 2, thereby improving the stability of the support structure.

[0039] Figure 11 This is a top view of the U-shaped connector of this embodiment, refer to Figure 11 As shown, as a further optimization solution, in this embodiment, a limiting column 51 is vertically provided in the U-shaped connecting member 5, one end of the limiting column 51 is fixedly connected to the U-shaped connecting member 5, and a countersunk hole is vertically opened at the bottom of the horizontal section, and the other end of the limiting column 51 extends into the countersunk hole and is matched with it.

[0040] In this embodiment, a limiting column 51 provided at the inner bottom of the U-shaped connector 5 is used to connect the U-shaped connector 5 to the lower support beam 2 in the vertical direction, and cooperate with the transversely connected fasteners to enable the M-shaped connector 4 and the U-shaped connector 5 to connect and reinforce the lower support beam 2 and the upper support beam 3 from the top and bottom and left and right directions, thereby improving the overall strength of the support assembly.

[0041] At the same time, in the above embodiment, the limiting column 51 can be used to ensure that the position of the U-shaped connector 5 remains stable when it embraces the M-shaped connector 4 and the lower support beam 2, further improving the stability of the support structure.

[0042] Figure 7 This is a front view of the upper support beam of this embodiment, refer to Figure 7 As shown, as a further optimization solution, in this embodiment, the upper support beam 3 is horizontally provided with a guide groove 32 on one side of the inner wall of the installation groove 31 close to the U-shaped connecting member 5, and the guide groove 32 is connected to the installation groove 31. The fastener passes through the guide groove 32 and is slidably connected thereto.

[0043] In this embodiment, the guide groove 32 provided on the upper support beam 3 is utilized so that the fastener can slide on the guide groove 32, and can change the position of the horizontal section at the top of the lower support beam 2 in the installation groove 31, thereby adjusting the horizontal distance between the bottom of the lower support beam 2 and the upper support beam 3, so that the support structure can adapt to foundation pits of different widths. On the basis of realizing the adjustment of the support spacing, the fastener passes through the U-shaped connector 5, the guide groove 32, the horizontal section of the lower support beam 2, and then connects to the middle part of the M-shaped connector 4, and can still maintain the stability of the support structure.

[0044] In order to adjust the spacing of the support structure in the above embodiment, the fastener needs to pass through the U-shaped connector 5, the guide groove 32, the horizontal section of the lower support beam 2 and connect with the middle part of the M-shaped connector 4, which will cause the length of the fastener to be too long. The fastener is subjected to huge shear stress, and it is necessary to avoid the fastener from being broken due to excessive shear stress.

[0045] Figure 8 This is a top view of the upper support beam of this embodiment. Figure 10 This is a bottom view of the M-shaped connector of this embodiment, referring to Figure 8 、 Figure 10 As shown, based on this, this embodiment provides a solution. A plurality of columns 41 are fixed vertically and continuously along the length direction on the side wall of the M-shaped connecting member 4, and a plurality of limiting grooves 33 are opened vertically and continuously along the length direction on one side of the upper support beam 3. The columns 41 are embedded in the limiting grooves 33 and are connected therewith.

[0046] In this embodiment, the columns 41 provided on the side walls of the M-shaped connector 4 cooperate with the limiting grooves 33 on the upper support beam 3, so that the two upper support beams 3 are connected to the M-shaped connector 4 in the width direction of the foundation pit, and the two upper support beams 3 pull the retaining plate 1 inward. At the same time, no fasteners need to extend to the middle part of the M-shaped connector 4 for connection. The fasteners only need to pass through the U-shaped connector 5, the M-shaped connector 4, and the guide groove 32 and then be connected to the horizontal section of the lower support beam 2 to avoid breakage caused by excessive length of the fasteners. A fastener is provided on each side of the middle part of the M-shaped connector 4, so that the lower support beam 2, the upper support beam 3, the M-shaped connector 4 and the U-shaped connector 5 can be connected and reinforced, thereby improving the stability of the foundation pit support structure and the convenience of assembly and connection of the support structure.

[0047] In the above embodiment, by utilizing the cooperation between the column 41 and the limiting groove 33 on the upper support beam 3, the contact area between the M-shaped connecting member 4 and the two upper support beams 3 can be increased, the pressure on the contact surface between the limiting groove 33 and the column 41 can be reduced, and deformation of the limiting groove 33 and the column 41 during the support process can be avoided, thereby improving the stability of the connection between the two upper support beams 3.

[0048] As a further optimization solution, in this embodiment, multiple reinforcing ribs 11 are horizontally arranged at equal vertical intervals between the retaining plate 1 and the lower support beam 2 arranged thereon. One end of the reinforcing rib 11 is connected to the retaining plate 1, and the other end is connected to the lower support beam 2.

[0049] In this embodiment, reinforcing ribs 11 are used to connect the lower support beam 2 and the retaining plate 1, so that the lower support beam 2 supports the retaining plate 1 below the upper support beam 3, thereby improving the support effect of the retaining plate 1 on the inner wall of the foundation pit. At the same time, a triangular connection is formed between the reinforcing ribs 11 and the retaining plate 1, thereby improving the stability of the connection between the lower support beam 2 and the retaining plate 1, preventing the lower support beam 2 from remaining stable in the vertical and horizontal directions, and ensuring the stability of the entire support structure.

[0050] Figure 5 This is the CC cross-sectional view of the support structure of this embodiment, refer to Figure 5 As shown, on the basis of the above embodiment, a clamp 12 is provided at one end of the reinforcing rib 11 away from the retaining plate 1, and the clamp 12 is sleeved on the lower support beam 2 and connected therewith.

[0051] In this embodiment, the clamp 12 is used to facilitate the connection between the reinforcing rib 11 and the lower support beam 2. In addition, the clamp 12 can also be arc-shaped. After the clamp 12 is mounted on the lower support beam 2, it is fixedly connected thereto by fasteners, which is also convenient for disassembly after use.

[0052] Figure 4 This is the BB cross-sectional view of the support structure of this embodiment, refer to Figure 4As shown, as a further optimization solution, in this embodiment, a stabilizing bar 6 is connected between the lower support beam 2 and the upper support beam 3 located on the same retaining plate 1.

[0053] In this embodiment, the lower support beam 2 and the upper support beam 3 located on the same side are connected by a stabilizing rod 6, thereby improving the stability of the connection between the upper and lower support beams 2 and the upper support beam 3 of the same retaining plate 1, further avoiding the lower support beam 2 and the upper support beam 3 from shaking in the length direction of the foundation pit, and similar to the use of reinforcing ribs 11 in the aforementioned embodiment, the stabilizing rod 6 and the retaining plate 1, the upper and lower support beams 2 and the upper support beam 3 form a stable triangular connection, further improving the stability of the foundation pit structure.

[0054] In the above embodiment, sleeves are fixedly provided at both ends of the stabilizing bar 6, and corresponding connecting columns are provided on the upper and lower support beams 2 and the upper support beam 3, and the sleeves are fixedly connected with the connecting columns.

[0055] The above disclosure is only a preferred specific embodiment of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A municipal road foundation pit support structure, used for supporting pipeline foundation pits, characterized in that: The support structure includes: Two retaining plates (1) and a support assembly arranged between the retaining plates (1), the two retaining plates (1) being arranged vertically and parallel to each other, the outer sides of the retaining plates (1) being in contact with the pit wall in the width direction of the pipeline foundation pit, and the support assembly comprising: Two lower support beams (2) are arranged obliquely downward between the two retaining plates (1), and one end of the two lower support beams (2) is fixedly connected to the inner bottom of the retaining plate (1) in a one-to-one correspondence; Two upper support beams (3) are horizontally arranged between the two retaining plates (1), the two upper support beams (3) are parallel to each other, one end of the two upper support beams (3) is fixedly connected to the inner top of the retaining plate (1) in a one-to-one correspondence, and the other end is respectively connected to the end of the lower support beam (2) away from the bottom of the retaining plate (1) to support the bottom and top of the retaining plate (1); The connecting mechanism is connected to the two upper support beams (3) so that the upper support beams (3) pull the tops of the two retaining plates (1) inward.

2. The municipal road foundation pit support structure according to claim 1, characterized in that: The connecting mechanism comprises: an M-shaped connecting member (4) and a fastener, wherein the M-shaped connecting member (4) is arranged on two upper support beams (3), a side of the upper support beam (3) close to the lower support beam (2) is located in a through groove of the M-shaped connecting member (4), and the fastener passes through the M-shaped connecting member (4) and is connected to the upper support beam (3).

3. The municipal road foundation pit support structure according to claim 2, characterized in that: Also includes: A U-shaped connecting piece (5) is vertically sleeved on the M-shaped connecting piece (4), the M-shaped connecting piece (4) and the lower support beam (2) are in contact with the inner wall of the U-shaped connecting piece (5), and the fastener passes through the U-shaped connecting piece (5) and is connected thereto.

4. The municipal road foundation pit support structure according to claim 3, characterized in that: The bottom of the upper support beam (3) is horizontally provided with a mounting groove (31), and the mounting groove (31) and the through groove of the M-shaped connecting member (4) are parallel to each other. The top of the lower support beam (2) has a horizontal section, and the horizontal section extends into the mounting groove (31) and abuts against the inner wall thereof. The bottom of the horizontal section abuts against the U-shaped connecting member (5), and the fastener extends into the mounting groove (31) and is fixedly connected to the lower support beam (2).

5. The municipal road foundation pit supporting structure according to claim 4, characterized in that: A limiting column (51) is vertically provided in the U-shaped connecting piece (5), one end of the limiting column (51) is fixedly connected to the U-shaped connecting piece (5), a countersunk hole is vertically opened at the bottom of the horizontal section, and the other end of the limiting column (51) extends into the countersunk hole and is cooperatively connected thereto.

6. The municipal road foundation pit support structure according to claim 4, characterized in that: The upper support beam (3) is provided with a guide groove (32) horizontally on one side of the mounting groove (31) close to the inner wall of the U-shaped connecting piece (5); the guide groove (32) is communicated with the mounting groove (31); and the fastener passes through the guide groove (32) and is slidably connected thereto.

7. The municipal road foundation pit support structure according to claim 2, characterized in that: A plurality of columns (41) are vertically fixedly provided on the side wall of the M-shaped connecting member (4) along its length direction, and a plurality of limiting grooves (33) are vertically opened on one side of the upper support beam (3) along its length direction, and the columns (41) are embedded in the limiting grooves (33) and are connected thereto.

8. The municipal road foundation pit supporting structure according to claim 1, characterized in that: A plurality of reinforcing ribs (11) are arranged horizontally at equal intervals along the vertical direction between the retaining plate (1) and the lower support beam (2) arranged thereon; one end of the reinforcing rib (11) is connected to the retaining plate (1), and the other end is connected to the lower support beam (2).

9. The municipal road foundation pit supporting structure according to claim 1, characterized in that: A stabilizing rod (6) is connected between the lower support beam (2) and the upper support beam (3) located on the same retaining plate (1).

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