A foundation pit enclosure of a prestressed structure

Abstract

The utility model belongs to the foundation pit construction technical field, concretely is a kind of foundation pit enclosure structure of prestressed structure, including foundation pit retaining wall, connecting angle plate is arranged between foundation pit retaining wall, the outer surface of foundation pit retaining wall is provided with fixed plate, fixed plate is provided with mounting shell between, the inside of mounting shell is provided with support rod, one end of support rod is fixedly connected with fixed plate respectively, the inside of mounting shell is provided with pressure sensor, alarm device is provided on the end surface of mounting shell, the inside of fixed plate is provided with inhaul cable, one end of inhaul cable is provided with the first fixed anchor that can adjust stress, and the first fixed anchor is slidably connected with fixed plate, the utility model can pull one end of inhaul cable to the periphery of foundation pit by setting fixed plate and fixed ring mechanism etc., solve the existing device and usually set up supporting device in the inside of foundation pit to support foundation pit retaining wall, but supporting device volume is huge, can influence staff construction, even endanger the safety of staff.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit construction technology, and in particular relates to a prestressed foundation pit retaining structure. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plane dimensions. However, the excavation pit retaining structure mainly bears the water pressure and soil pressure generated by the excavation and unloading of the excavation pit, and transmits this pressure to the support. It is a temporary construction retaining wall structure for stabilizing the excavation pit and preventing the outer soil layer from collapsing.

[0003] Patent No. CN216615881U discloses an arched prestressed support structure for foundation pit retaining structures, including a concrete pile foundation, a top arched support, and a waist arched support. A top support and a waist support are fixedly installed on the concrete pile foundation. The top arched support is rotatably mounted on the top support, and the waist arched support is rotatably mounted on the waist support. The top arched support and the waist arched support are detachably connected to the concrete pile foundation. Lateral pressure adjustment components are installed inside both the top arched support and the waist arched support. The detachable installation of the top support and the waist support on the concrete pile foundation facilitates the recycling of the top support and the waist support, reducing material waste. Through the setting of the lateral pressure adjustment components, this prestressed support structure can actively adjust the reverse lateral pressure and compensate for the lateral displacement of the retaining piles.

[0004] In existing technologies, arched supports and waist-arched supports can provide good support, but the following problems still exist in the overall use: First, existing foundation pit retaining structures usually set up support devices inside the foundation pit to support the foundation pit wall, but the support devices are bulky, which will affect the construction workers and even endanger their safety. Therefore, there is an urgent need for an external stress structure to strengthen foundation pit protection; Second, when the existing foundation pit wall comes into contact with the soil inside the foundation pit, the moisture contained in the foundation pit soil or the surrounding rainwater will cause soil erosion, resulting in instability of the foundation pit wall and easy collapse, which will endanger the safety of workers. Existing devices cannot clean the moisture in the soil near the foundation pit. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a prestressed foundation pit retaining structure. By setting up mechanisms such as fixing plates and fixing rings, one end of the cable can be pulled towards the perimeter of the foundation pit. This solves the problem that existing devices typically use support devices inside the foundation pit to support the retaining wall, but these support devices are bulky, affecting the construction work and even endangering the safety of workers. By setting up structures such as diversion pipes and heating pipes, concrete can be filled around the foundation pit retaining wall through the reinforcement cavity. This solves the problem that when the existing foundation pit retaining wall comes into contact with the soil inside the foundation pit, the moisture contained in the soil or the surrounding rainwater will cause soil erosion, leading to instability of the foundation pit retaining wall and easy collapse.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a prestressed foundation pit retaining structure, including foundation pit walls, connecting corner plates provided between multiple foundation pit walls, fixing plates provided on the outer surfaces of multiple foundation pit walls, an installation shell provided between multiple fixing plates, multiple support rods provided inside the installation shell, one end of each of the multiple support rods being fixedly connected to a fixing plate, multiple pressure sensors provided inside the installation shell, the detection ends of the multiple pressure sensors being movably abutting against the support rods, an alarm device provided on the end face of the installation shell, multiple cables provided inside each of the multiple fixing plates, one end of each of the multiple cables being provided with a first fixing anchor capable of adjusting stress, the first fixing anchor being slidably connected to the fixing plate.

[0007] Preferably, the outer surface of the first fixed anchor is provided with a fixing ring, the inside of the fixing ring is provided with a threaded rod, one end of the threaded rod is provided with a handle, one end of the threaded rod is rotatably connected to the fixing plate, and the inside of the fixing ring is provided with an auxiliary rod, one end of the auxiliary rod is fixedly connected to the fixing plate.

[0008] Preferably, one end of each of the plurality of cables is provided with a second fixed anchor, the bottom end face of each of the plurality of second fixed anchors is provided with a force-shaping plate, and the bottom end face of each of the plurality of force-shaping plates is provided with a plurality of fins.

[0009] Preferably, the outer surfaces of the multiple foundation pit retaining walls are provided with top reinforcement chambers, the interior of the top reinforcement chambers is provided with reinforcement cavities, and the bottom of the reinforcement cavities is provided with multiple diversion pipes connected to the bottom end face of the top reinforcement chambers, and the outer surfaces of the multiple diversion pipes are provided with multiple mud outlets.

[0010] Preferably, a drying chamber is provided inside the top reinforcement chamber on one side of the reinforcement cavity, and multiple heating pipes are connected to the bottom end face of the top reinforcement chamber below the drying chamber. One bottom end of the multiple heating pipes is connected to a bottom air outlet chamber, and an exhaust pipe is provided inside the bottom air outlet chamber.

[0011] Preferably, each of the plurality of exhaust pipes has an exhaust port on one side of the outer surface of the pit retaining wall, and an air inlet is provided above the exhaust port. The air inlet is connected to the interior of the drying chamber, and a mud injection port is provided on one side of the air inlet, which is connected to the interior of the reinforcement cavity.

[0012] Preferably, a drying fan is provided on the end face of the mounting housing, and the drying fan is detachably connected to the air inlet via a flexible hose.

[0013] Preferably, the outer surfaces of the top reinforced compartment and the bottom air vent compartment are provided with multiple protruding tips.

[0014] In summary, compared with existing technologies, the beneficial effects of this solution are as follows: (1) By setting up a first fixed anchor and cable, as well as a fixed plate and a fixed ring, this utility model can pull one end of the cable to the periphery of the foundation pit, thereby fixing multiple fixed plates, reducing the space occupied inside the foundation pit, thus facilitating construction by workers. At the same time, by setting up a fixed ring and a threaded rod, the first fixed anchor can be tensioned, so that the first fixed anchor can tighten the cable and adjust the prestress. By setting up wing plates, the friction between the force distribution plate and the ground can be increased, thereby improving the overall stability of the device. (2) By setting up a top reinforcement chamber, a bottom air outlet chamber, a diversion pipe and a heating pipe, etc., this utility model can fill concrete around the foundation pit wall through the reinforcement chamber to prevent soil erosion and insufficient foundation pit support, thereby improving the stability of the device. At the same time, by setting up a heating pipe and a drying chamber, it can heat the surrounding soil, dry the nearby moisture, and accelerate the solidification of concrete, thereby improving the molding efficiency of the device. (3) By setting up a support rod and a pressure sensor, this utility model can detect the position of the foundation pit retaining wall. When the foundation pit retaining wall tilts, the pressure sensor can judge the danger by the pressure it receives and start the alarm device through electrical connection to evacuate the staff. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 for Figure 2 A three-dimensional sectional view at point AA; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 for Figure 3 A magnified view of a section at point C; Figure 6 for Figure 1 A magnified view of a section at point D; Figure 7 A structural schematic diagram of the top reinforcement compartment components; In the diagram: Pit wall 10, fixing plate 11, stop block 12, first fixing anchor 13, cable 14, force distribution plate 15, second fixing anchor 16, wing plate 17, top reinforcement chamber 18, bottom air outlet chamber 19, extension tip 20, reinforcement cavity 21, diversion pipe 22, drying chamber 23, heating pipe 24, exhaust pipe 25, mounting shell 26, support rod 27, pressure sensor 28, alarm device 29, air inlet connection port 30, drying fan 31, mud injection port 32, exhaust port 33, fixing ring 34, threaded rod 35, handle 36, auxiliary rod 37, connecting angle plate 38, mud outlet 40. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A prestressed foundation pit retaining structure includes foundation pit retaining walls 10, with connecting corner plates 38 arranged between multiple foundation pit retaining walls 10. Fixing plates 11 are provided on the outer surfaces of the multiple foundation pit retaining walls 10, and stoppers 12 are provided between the fixing plates 11 and the connecting corner plates 38. Mounting shells 26 are provided between the multiple fixing plates 11, and multiple support rods 27 are provided inside the mounting shells 26. One end of each support rod 27 is fixedly connected to a fixing plate 11. The support rods 27 provide support for the inner walls of the foundation pit retaining walls 10. The support rods 27 are located at the top of the foundation pit retaining walls and can avoid... To avoid affecting the work of staff and improve the convenience of the device, multiple pressure sensors 28 are installed inside the mounting shell 26. The detection ends of the multiple pressure sensors 28 are movably abutting against the support rod 27. An alarm device 29 is installed on the end face of the mounting shell 26. When the pit wall 10 tilts, the support rod 27 will move into the mounting shell 26 and squeeze the detection ends of the pressure sensors 28. After receiving the signal, the detection ends of the pressure sensors 28 will activate the alarm device 29 through electrical connection, causing the alarm device 29 to sound an alarm and alert the staff to evacuate, thereby improving the safety of the device.

[0018] Further reference Figure 2 , Figure 3 , Figure 5 and Figure 6Multiple fixing plates 11 each contain multiple cables 14. One end of each cable 14 is fitted with a first fixing anchor 13 capable of adjusting stress. The first fixing anchor 13 is slidably connected to the fixing plate 11. A fixing ring 34 is provided on the outer surface of the first fixing anchor 13. A threaded rod 35 is rotatably mounted inside the fixing ring 34. A threaded sleeve is also provided inside the fixing ring 34, and the threaded sleeve is fixedly connected to the threaded rod 35. A handle 36 is provided at one end of the threaded rod 35, and this end is rotatably connected to the fixing plate 11. An auxiliary rod 37 is slidably mounted inside the fixing ring 34, and one end of the auxiliary rod 37 is fixedly connected to the fixing plate 11. Each cable 14 has a second fixing anchor 16 at one end, and a force-sharing plate 15 is provided on the bottom end face of each second fixing anchor 16. Each force-shaping plate 15 has multiple fins 17 on its bottom end face. By setting the fins 17, the friction between the force-shaping plate 15 and the ground can be increased, thereby improving the stability of the second fixed anchor 16. When supporting the retaining wall, the threaded rod 35 is rotated by rotating the handle 36, which causes the threaded rod 35 to move the fixed ring 34. When the fixed ring 34 moves, it causes the first fixed anchor 13 inside to move away from the fixed plate 11. While moving, the first fixed anchor 13 pulls multiple internal cables 14, making the cables 14 taut. The other end of the cables 14 passes through the soil of the foundation pit and is fixedly connected to the second fixed anchor 16. The force-shaping plate 15 at the bottom of the second fixed anchor 16 is fixedly connected to the ground around the foundation pit. Concrete can be pre-embedded in the ground around the foundation pit to improve the stability of the force-shaping plate 15 and the ground.

[0019] It should be noted that in actual operation, multiple retractable and foldable corrugated sleeves are installed on the outside of the threaded rod 35, between the fixed ring 34 and the handle 36, and between the fixed ring 34 and the fixed plate 11, to prevent waste or dust generated during operation from falling to the outside of the threaded rod 35 and to ensure the normal transmission of the threaded rod 35. This is prior art, and this application will not draw or describe it in detail.

[0020] Further reference Figure 1 , Figure 2 and Figure 7Multiple pit retaining walls 10 have top reinforcement chambers 18 on their outer surfaces. Each top reinforcement chamber 18 contains a reinforcement cavity 21. Multiple diversion pipes 22 are connected to the bottom end face of the top reinforcement chamber 18 below the reinforcement cavity 21. Multiple mud outlets 40 are located on the outer surface of each diversion pipe 22. A drying chamber 23 is located on one side of the reinforcement cavity 21 inside the top reinforcement chamber 18. Multiple heating pipes 24 are connected to the bottom end face of the top reinforcement chamber 18 below the drying chamber 23. A bottom air outlet chamber 19 is connected to one bottom end of each heating pipe 24. An exhaust pipe 25 is located inside the bottom air outlet chamber 19. Each exhaust pipe 25 has an exhaust port 33 on one side of its outer surface on the pit retaining wall 10. An air inlet 30 is located above the exhaust port 33 and connects to the interior of the drying chamber 23. A mud injection port 32 is located on one side of the air inlet 30. The inlet 32 ​​is connected to the interior of the reinforcement chamber 21. A drying fan 31 is provided on the end face of the mounting shell 26. The drying fan 31 is detachably connected to the air inlet 30 via a hose. The detachment can be achieved through a quick-connect coupling, which is a common and conventional technology. Therefore, it is not described or drawn in detail in this solution. The outer surfaces of the top reinforcement chamber 18 and the bottom air outlet chamber 19 are provided with multiple protruding tips 20. When installing the foundation pit retaining wall 10, the top reinforcement chamber 18, the bottom air outlet chamber 19, and the protruding tips 20 are inserted into the surrounding soil. Concrete is injected into the interior of the mud injection port 32 through an external circulation pump or conveying equipment. The concrete enters the interior of the reinforcement chamber 21 through the mud injection port 32 and flows through the reinforcement chamber 21 to multiple diversion pipes 22. It then flows out from the mud outlet 40 on the outer surface of the diversion pipes 22, thereby filling the surrounding soil and improving the supporting capacity of the surrounding soil for the foundation pit retaining wall 10.

[0021] Simultaneously, during the installation of the foundation pit retaining wall 10 or in rainy weather, the drying fan 31 is started, and the hoses at the air outlet of the drying fan 31 are connected to the air inlet 30. The drying fan 31 delivers dry hot air into the drying chamber 23 through the air inlet 30. The dry hot air exchanges heat with the soil or concrete through the heating pipe 24, heating the soil or concrete, accelerating concrete molding and soil drying, and reducing soil erosion. At the same time, by setting up multiple columnar structures such as the heating pipe 24 and the diversion pipe 22, the connection between the foundation pit retaining wall 10 and the surrounding soil of the foundation pit can be increased, further improving the stability of the device.

[0022] The prestressed foundation pit retaining structure of this utility model uses common mechanical methods for installation and connection. The control of the driving component by the detection component and the related detection methods and specific circuit relationships of each detection component can all adopt conventional electrical control technology. As long as the corresponding motion relationship can be completed and its beneficial effect can be achieved in this solution, it can be implemented. The pressure sensor 28, alarm device 29, drying fan 31, first fixed anchor 13, and second fixed anchor 16 in the prestressed foundation pit retaining structure of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0023] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0024] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0025] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A prestressed foundation pit retaining structure, comprising a foundation pit retaining wall (10), characterized in that, A connecting corner plate (38) is provided between each of the multiple foundation pit retaining walls (10). A fixing plate (11) is provided on the outer surface of each of the multiple foundation pit retaining walls (10). An installation shell (26) is provided between the multiple fixing plates (11). A multiple support rod (27) is provided inside the installation shell (26). One end of each of the multiple support rods (27) is fixedly connected to the fixing plate (11). A multiple pressure sensor (28) is provided inside the installation shell (26). The detection end of each of the multiple pressure sensor (28) is movably abutting against the support rod (27). An alarm device (29) is provided on the end face of the installation shell (26). A multiple cable (14) is provided inside each of the multiple fixing plates (11). One end of each of the multiple cable (14) is provided with a first fixed anchor (13) that can adjust the stress. The first fixed anchor (13) is slidably connected to the fixing plate (11).

2. The prestressed foundation pit retaining structure according to claim 1, characterized in that, The first fixed anchor (13) has a fixed ring (34) on its outer surface. The fixed ring (34) has a threaded rod (35) rotatably mounted inside it. One end of the threaded rod (35) has a handle (36) and one end of the threaded rod (35) is rotatably connected to the fixed plate (11). The fixed ring (34) has an auxiliary rod (37) slidably mounted inside it and one end of the auxiliary rod (37) is fixedly connected to the fixed plate (11).

3. The prestressed foundation pit retaining structure according to claim 1, characterized in that, Each of the multiple cables (14) is provided with a second fixed anchor (16) at one end, and each of the multiple second fixed anchors (16) is provided with a force-shaping plate (15) at the bottom end face, and each of the multiple force-shaping plates (15) is provided with a multiple wing plate (17) at the bottom end face.

4. The prestressed foundation pit retaining structure according to claim 1, characterized in that, The outer surfaces of the multiple foundation pit retaining walls (10) are provided with top reinforcement chambers (18), and the interior of the top reinforcement chambers (18) is provided with reinforcement cavities (21). The bottom of the reinforcement cavities (21) is connected to the bottom end face of the top reinforcement chambers (18) and multiple diversion pipes (22) are provided on the outer surfaces of the multiple diversion pipes (22). Multiple mud outlets (40) are provided on the outer surfaces of the multiple diversion pipes (22).

5. The prestressed foundation pit retaining structure according to claim 4, characterized in that, Inside the top reinforced chamber (18), a drying chamber (23) is provided on one side of the reinforced cavity (21). Below the drying chamber (23), multiple heating pipes (24) are connected to the bottom end face of the top reinforced chamber (18). One bottom end of the multiple heating pipes (24) is connected to a bottom air outlet chamber (19). An exhaust pipe (25) is provided inside the bottom air outlet chamber (19).

6. The prestressed foundation pit retaining structure according to claim 5, characterized in that, Each of the multiple exhaust pipes (25) has an exhaust port (33) on one side of the outer surface of the pit retaining wall (10). An air inlet (30) is provided above the exhaust port (33). The air inlet (30) is connected to the interior of the drying chamber (23). A mud injection port (32) is provided on one side of the air inlet (30). The mud injection port (32) is connected to the interior of the reinforcement cavity (21).

7. The prestressed foundation pit retaining structure according to claim 1, characterized in that, A drying fan (31) is provided on the end face of the mounting shell (26), and the drying fan (31) is detachably connected to the air inlet (30) through a hose.

8. The prestressed foundation pit retaining structure according to claim 5, characterized in that, The outer surfaces of the top reinforced compartment (18) and the bottom air vent compartment (19) are provided with multiple protruding tips (20).

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