A safety protection device for a deep foundation pit of a construction site

Abstract

The application discloses a kind of safety protection devices for building site deep foundation pit, including base plate, fixed seat, collection water tank, the side of the base plate is fixedly connected with support plate by bolt, the top of the base plate is fixedly connected with atomization water tank and dust setting atomizer, both sides of the atomization water tank are inserted with water pipe two, the atomization water tank provides water source for dust setting atomizer, the surface of the base plate and support plate is all provided with water diversion channel, the beneficial effects of the present application are: by the cooperation between adjusting device, reinforcing mechanism, monitoring system, under the gradually increasing soil pressure, the capacity of sliding water tank is increased by using electric telescopic rod to drive telescopic plate to move, so as to increase the weight of sliding water tank, since sliding water tank slides on the top of support plate, there is a supporting force on support plate, so as to increase the supporting force of support plate on deep foundation pit sidewall, to improve the safety of foundation pit construction.

Description

Technical Field

[0001] This invention belongs to the field of deep foundation pit protection technology, specifically relating to a safety protection device for deep foundation pits at construction sites. Background Technology

[0002] When constructing large buildings, deep foundation pits are required to ensure the stability of the buildings. Deep foundation pits refer to projects with an excavation depth of more than 5 meters, or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters. Because deep foundation pits are deep, protective structures need to be set up inside the pit to improve the stability of the pit sidewalls and reduce the occurrence of safety accidents.

[0003] Existing structural fixing methods are limited and have weak reinforcement strength. They are easily affected by rain, which can cause changes in the strength and stability of the soil, thereby increasing the risks of foundation pit construction.

[0004] Chinese patent CN202223179320.7 discloses a deep foundation pit support frame. Through the cooperation of connecting plates and connecting grooves, the support plates can be spliced, making the deep foundation pit support frame applicable to foundation pits of different sizes, thus improving its versatility. The fixing device enhances the stability of the connection between the support plates. The cooperation of the connecting grooves, connecting plates, and fixing devices improves the convenience of splicing and disassembling the deep foundation pit support frame. However, some shortcomings still exist: Foundation pit engineering has strong spatiotemporal effects. The depth and planar shape of the foundation pit have a significant impact on the stability and deformation of the foundation pit support system. Soil exhibits creep, especially during rainy weather. The soil pressure acting on the support structure increases over time, and creep reduces soil strength and slope stability, making it prone to collapse. Current foundation pit protection devices involve setting up support frames around the deep pit for support and protection. However, existing structural fixing methods are limited, and the stability of the foundation pit sidewalls decreases during rainy weather, making it prone to collapse and increasing the risks of foundation pit construction. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses a safety protection device for deep foundation pits at construction sites. Through the coordination of a water diversion channel and a drainage pipe, this device can collect rainwater during rainfall and utilize a reinforcement mechanism to enhance the protective effect of the support plate, reducing the risk of collapse of the deep foundation pit sidewalls. By adjusting the coordination between the device, the reinforcement mechanism, and the monitoring system, the capacity of the sliding water tank is increased under gradually increasing soil pressure, thereby increasing the weight of the sliding water tank. Since the sliding water tank slides on top of the support plate, it provides support to the support plate, further increasing the support force of the support plate on the deep foundation pit sidewalls, thus improving the safety of foundation pit construction.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A safety protection device for deep foundation pits at construction sites includes a base plate, a fixed base, and a water collection tank. A vertical support plate is bolted to one side of the base plate. Several anchor rods are bolted to the interior of the support plate. An atomizing water tank and a dust-suppressing atomizer are fixedly connected to the top of the base plate. Water pipes are inserted into both sides of the atomizing water tank, which provides water to the dust-suppressing atomizer. Water channels are formed on the surfaces of both the base plate and the support plate. The device is characterized by: adjusting devices on both sides of the support plate; a reinforcing mechanism movably connected to the top of the fixed base; and a closing mechanism on one side of the reinforcing mechanism. The device is configured to use the soil pressure on the sidewall of the deep foundation pit to compress the contact plate and spring, thereby moving the fixed shaft and triggering the monitoring system. This causes the reinforcement mechanism to increase its weight and apply pressure to the support plate. The reinforcement mechanism is configured to move the telescopic plate by moving the electric telescopic rod, thereby controlling the weight of the sliding water tank to support the support plate. The monitoring system is configured to detect the pressure of the sliding plate against the pressure sensor through a processor to control the stroke of the electric telescopic rod. When the pressure of the pressure sensor increases, the electric telescopic rod will retract, increasing the capacity of the sliding water tank. This causes the weight of the sliding water tank to increase according to the increase in soil pressure, thus protecting the sidewall of the deep foundation pit.

[0007] Furthermore, both of the aforementioned adjustment devices include a fixed frame, which is fixedly connected to the support plate. A contact plate is slidably connected inside the fixed frame. Several spring seats are fixedly connected to one side of the fixed frame. A spring is fixedly connected inside the spring seat. One end of the spring is fixedly connected to the contact plate. A fixed shaft is fixedly connected to one side of the contact plate. The fixed shaft is slidably connected to the fixed frame. A fixed block is fixedly connected to one end of the fixed shaft.

[0008] Furthermore, the fixing base is fixed to the bottom of the deep foundation pit, and a support plate is fixedly connected to the top of the fixing base. The support plate is an inclined plate.

[0009] Furthermore, the reinforcement mechanism includes a sliding water tank, which is slidably connected to the top of the support plate. One side of the sliding water tank is in contact with the support plate. An electric telescopic rod is fixedly installed inside the sliding water tank. A telescopic plate is fixedly connected to the telescopic end of the electric telescopic rod. The telescopic plate is slidably connected to the inside of the sliding water tank. A water pipe is inserted into both sides of the sliding water tank.

[0010] Furthermore, the closure mechanism includes a support frame, which is fixedly connected to the inside of the sliding water tank. Two guide rods are fixedly connected to one side of the support frame, and floats are slidably connected to the outer walls of the two guide rods. A plug is fixedly connected to one side of the float.

[0011] Furthermore, a drain pipe is fixedly connected to one side of the support plate, a spring tube is inserted into the bottom of the drain pipe, one end of the spring tube is inserted into the top of the sliding water tank, and the plug can slide on one end of the spring tube.

[0012] Furthermore, a connecting pipe is inserted into one side of the water collection tank, and the connecting pipe is connected to the drain pipe. A water pump is installed on one side of the water collection tank. The pump's pumping end is connected to the water collection tank, and the pump's outlet end is connected to the water pipe. Two solenoid valves are installed at the pump's outlet end, and when one solenoid valve is open, the other solenoid valve is closed.

[0013] Furthermore, the monitoring system includes two extension seats, which are fixedly connected to the outer wall of the sliding water tank. A sliding plate is slidably connected inside the extension seat, and one side of the sliding plate is in contact with a fixed block. A pressure sensor is fixedly installed inside the extension seat and is fixedly connected to the sliding plate. A processor is fixedly connected inside the extension seat and is electrically connected to the pressure sensor.

[0014] Furthermore, a liquid level sensor is fixedly installed inside the atomizing water tank, and the liquid level sensor is electrically connected to the processor.

[0015] Furthermore, when the atomizing water tank is full of water, a signal is transmitted to the processor through the liquid level sensor, which closes one of the solenoid valves to block the water supply from the collection tank to the atomizing water tank, while opening the other solenoid valve to transport the water in the collection tank to an external water tank for processing.

[0016] The beneficial effects of this invention are as follows: This invention discloses a safety protection device for deep foundation pits at construction sites. Through the coordination of a water diversion channel and a drainage pipe, the device can collect rainwater during rainfall (addressing the situation of prolonged rainfall). A reinforcement mechanism enhances the protective effect of the support plate, reducing the risk of deep foundation pit sidewall collapse. By adjusting the coordination between the device, reinforcement mechanism, and monitoring system, under gradually increasing soil pressure, an electric telescopic rod drives the telescopic plate to move, increasing the capacity and weight of the sliding water tank. Since the sliding water tank slides on top of the support plate, it provides support to the support plate, thereby increasing the support force of the support plate on the deep foundation pit sidewall and improving the safety of foundation pit construction. Rainwater enters the drainage pipe from the irrigation canal, then enters the interior of the sliding water tank through the spring tube, and then enters the interior of the sliding water tank through the water pipe, so that the water in each sliding water tank is at the same level, achieving the effect of balancing pressure. In addition, a liquid level sensor is fixedly installed inside the atomizing water tank. When the atomizing water tank is full of water, the liquid level sensor can transmit a signal to the processor, which will close one of the solenoid valves to stop the collection water tank from continuing to supply water to the atomizing water tank, and at the same time open the other solenoid valve to transport the water in the collection water tank to the external water tank for processing.

[0017] (2) The safety protection device for deep foundation pits at construction sites described in this invention is arranged and installed sequentially on the side wall of the deep foundation pit according to the actual situation. Through the cooperation of water diversion channel and drainage pipe, it can reduce the contact of rainwater with the side wall of the deep foundation pit on rainy days, thereby reducing the degree of soil creep and enabling the soil on the side wall of the deep foundation pit to maintain a certain stability, thereby reducing the probability of the side wall of the deep foundation pit collapsing. In addition, the collected rainwater can be used for dust suppression atomizers during construction, saving energy consumption and further improving the practicality of the safety protection device for deep foundation pits at construction sites. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sequential arrangement and installation provided by the present invention; Figure 3 This is a partial structural cross-sectional view provided by the present invention; Figure 4 A schematic diagram of the structure of the closure mechanism provided by the present invention; Figure 5 This is a schematic diagram of the sequentially arranged sliding water tanks provided by the present invention; Figure 6 A cross-sectional view of the adjustment device provided by the present invention; Figure 7 This is a top sectional view of the adjustment device and monitoring system provided by the present invention. Figure 8 This is a schematic diagram of the adjustment device structure provided by the present invention; Figure 9 This is a front sectional view of the adjustment device and monitoring system provided by the present invention; Figure 10 This is a structural schematic diagram of the support plate portion provided by the present invention.

[0019] List of identifiers in attached diagrams: 1. Base plate; 2. Support plate; 3. Adjustment device; 31. Fixing frame; 32. Contact plate; 33. Fixing shaft; 34. Spring 1; 35. Spring seat; 36. Fixing block; 4. Fixing seat; 41. Support plate; 5. Reinforcing mechanism; 51. Telescopic plate; 52. Electric telescopic rod; 53. Sliding water tank; 6. Monitoring system; 61. Extension seat; 62. Pressure sensor; 63. Slide plate; 64. Processor; 7. Drainage pipe; 8. Water pipe 1; 9. Water diversion channel; 10. Atomizing water tank; 11. Water pipe 2; 12. Dust suppressing atomizer; 13. Collection water tank; 14. Connecting pipe; 15. Anchor rod; 16. Sealing mechanism; 161. Support frame; 162. Guide rod; 163. Float plate; 164. Block; 17. Spring tube. Implementation

[0020] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Example

[0021] like Figures 1-10 As shown, this embodiment of the invention provides a safety protection device for deep foundation pits at construction sites, including a base plate 1, a fixing seat 4, and a water collection tank 13. The fixing seat 4 is fixed to the bottom of the deep foundation pit, and a support plate 41 is fixedly connected to the top of the fixing seat 4. The support plate 41 is an inclined plate. A vertical support plate 2 is fixedly connected to one side of the base plate 1 by bolts. Several anchor rods 15 are fixedly connected to the inside of the support plate 2 by bolts. An atomizing water tank 10 and a dust suppressing atomizer 12 are fixedly connected to the top of the base plate 1. Water pipes 11 are inserted into both sides of the atomizing water tank 10 to provide water for the dust suppressing atomizer 12. Water channels 9 are opened on the surfaces of the base plate 1 and the support plate 2. Adjustment devices 3 are provided on both sides of the support plate 2. A reinforcing mechanism 5 is movably connected to the top of the fixing seat 4. A closing mechanism 16 is provided on one side of the reinforcing mechanism 5.

[0022] The adjustment device 3 is configured to use the soil pressure on the sidewall of the deep foundation pit to compress the spring 34 of the contact plate 32, thereby moving the fixed shaft 33 and triggering the monitoring system 6 to increase the weight of the reinforcement mechanism 5 to apply pressure to the support plate 2.

[0023] The reinforcement mechanism 5 is assembled to drive the telescopic plate 51 to move through the movement of the electric telescopic rod 52, thereby controlling the weight of the sliding water tank 53 and supporting the support plate 2.

[0024] The monitoring system 6 is configured to detect the pressure of the sliding plate 63 on the pressure sensor 62 through the processor 64 to control the stroke of the electric telescopic rod 52. When the pressure of the pressure sensor 62 increases, the electric telescopic rod 52 will retract, increasing the capacity of the sliding water tank 53, so that the weight of the sliding water tank 53 increases according to the increase of soil pressure, thus protecting the side wall of the deep foundation pit.

[0025] In this embodiment, by adjusting the coordination between the device 3, the reinforcement mechanism 5, and the monitoring system 6, under gradually increasing soil pressure, the electric telescopic rod 52 drives the telescopic plate 51 to move, thereby increasing the capacity of the sliding water tank 53 and thus increasing its weight. Since the sliding water tank 53 slides on the top of the support plate 41, it provides support to the support plate 2, thereby increasing the support force of the support plate 2 on the side wall of the deep foundation pit and improving the safety of the foundation pit construction. Rainwater enters from the water diversion channel 9 into the drainage pipe 7, then enters the interior of the sliding water tank 53 through the spring pipe 17, and then through the water pipe 8, so that the water in each sliding water tank 53 is at the same level, achieving the effect of balancing pressure.

[0026] Both adjustment devices 3 include a fixing frame 31, which is fixedly connected to the support plate 2. A contact plate 32 is slidably connected inside the fixing frame 31. Several spring seats 35 are fixedly connected to one side of the fixing frame 31. A spring 34 is fixedly connected inside the spring seat 35. One end of the spring 34 is fixedly connected to the contact plate 32. A fixing shaft 33 is fixedly connected to one side of the contact plate 32. The fixing shaft 33 is slidably connected to the fixing frame 31. A fixing block 36 is fixedly connected to one end of the fixing shaft 33. The monitoring system 6 includes two extension seats 61, which are fixedly connected to the outer wall of the sliding water tank 53. A sliding plate 63 is slidably connected inside the extension seat 61. One side is in contact with the fixed block 36. A pressure sensor 62 is fixedly installed inside the extension seat 61. The pressure sensor 62 is fixedly connected to the slide plate 63. A processor 64 is fixedly connected inside the extension seat 61. The processor 64 is electrically connected to the pressure sensor 62. The reinforcement mechanism 5 includes a sliding water tank 53. The sliding water tank 53 is slidably connected to the top of the support plate 41. One side of the sliding water tank 53 is in contact with the support plate 2. An electric telescopic rod 52 is fixedly installed inside the sliding water tank 53. A telescopic plate 51 is fixedly connected to the telescopic end of the electric telescopic rod 52. The telescopic plate 51 is slidably connected to the inside of the sliding water tank 53. Water pipes 8 are inserted into both sides of the sliding water tank 53.

[0027] The closing mechanism 16 includes a support frame 161, which is fixedly connected to the inside of the sliding water tank 53. Two guide rods 162 are fixedly connected to one side of the support frame 161. A float plate 163 is slidably connected to the outer wall of the two guide rods 162. A plug 164 is fixedly connected to one side of the float plate 163. A drain pipe 7 is fixedly connected to one side of the support plate 2. A spring tube 17 is inserted into the bottom of the drain pipe 7. One end of the spring tube 17 is inserted into the top of the sliding water tank 53. The plug 164 can slide on one end of the spring tube 17.

[0028] In this embodiment, a filter screen is provided at one end of the spring tube 17 to filter impurities in the rainwater in the drain pipe 7.

[0029] A connecting pipe 14 is inserted into one side of the water collection tank 13, and the connecting pipe 14 is connected to the drain pipe 7. A water pump is installed on one side of the water collection tank 13. The pump's suction end is connected to the water collection tank 13, and the pump's outlet end is connected to the second water pipe 11. When all the sliding water tanks 53 are full of water, the rainwater in the drain pipe 7 will enter the water collection tank 13 through the connecting pipe 14 for collection. Then, the water is pumped to the atomizing water tank 10 by the water pump. The atomizing water tank 10 is connected to the second water pipe 11 so that the water in each atomizing water tank 10 is at the same level. The water in the atomizing water tank 10 is used to supply the dust suppression atomizer 12. This safety protection device for deep foundation pits at construction sites uses the collected rainwater for the dust suppression atomizer 12 during construction, saving energy consumption and further improving the practicality of the safety protection device for deep foundation pits at construction sites.

[0030] In this embodiment, the safety protection device for deep foundation pits at construction sites can be installed sequentially according to the actual situation. A liquid level sensor is fixedly installed inside the atomizing water tank 10. The liquid level sensor is electrically connected to the processor 64. Two solenoid valves are installed at the water outlet of the water pump. The solenoid valves are electrically connected to the processor 64. When one solenoid valve is open, the other solenoid valve is closed. When the atomizing water tank 10 is full of water, the liquid level sensor transmits a signal to the processor 64, which closes one of the solenoid valves, blocking the water supply from the collection tank 13 to the atomizing water tank 10. At the same time, the other solenoid valve is opened, and the water in the collection tank 13 is transported to an external water tank for treatment. This avoids the situation where rainwater cannot be discharged when the atomizing water tank 10 is full during prolonged rain. In other words, the water pump can be connected to another external water tank for collection.

[0031] Specific working methods: In use, the base plate 1 is fixed to the side wall edge of the deep foundation pit, and the support plate 2 is fixed to the base plate 1 with bolts. The support plate 2 should be in contact with the side wall of the deep foundation pit during installation. The fixing seat 4 is installed at the bottom of the deep foundation pit, and one side of the sliding water tank 53 is in contact with the support plate 2. According to the actual situation, the safety protection device for the deep foundation pit of the construction site is installed in sequence. On rainy days, the safety protection device for the deep foundation pit of the construction site will protect the side wall of the deep foundation pit from contact with rainwater. Rainwater enters the drainage pipe 7 from the water diversion channel 9, then enters the interior of the sliding water tank 53 through the spring pipe 17, and then enters the interior of the sliding water tank 53 through the water pipe 8, so that the water in each sliding water tank 53 is at the same level. When the soil pressure on the support plate 2 increases at a certain point on the sidewall of the deep foundation pit due to construction or water pressure, the contact plate 32 will compress the spring 34, which will drive the fixed shaft 33 and the fixed block 36 to apply pressure to the sliding plate 63 and the pressure sensor 62. The processor 64 monitors the data of the pressure sensor 62 in real time, and the electric telescopic rod 52 also moves according to the data of the pressure sensor 62; that is, the capacity of the sliding water tank 53 is adjusted according to the data of the pressure sensor 62. The electric telescopic rod 52 drives the telescopic plate 51 to move, expanding the water storage capacity in the sliding water tank 53. This allows water from the adjacent sliding water tank 53 to enter the sliding water tank 53 through the water pipe 8, thereby increasing the weight of the sliding water tank 53 and thus increasing the protective force on the support plate 2 at this location. (The sliding water tank 53 slides on the top of the support plate 41, providing support for the support plate 2.) The sliding water tank 53 contains a float plate 163, which moves along the guide rod 162 following the water source within the sliding water tank 53. When the water source in the sliding water tank 53 reaches a certain level, the blockage 164 on the float plate 163 will block the spring tube 17, meaning that no more water will enter the sliding water tank 53; this, in turn, will improve the water storage speed of other sliding water tanks 53. When all the other sliding water tanks 53 are full of water, the rainwater in the drain pipe 7 will enter the collection water tank 13 through the connecting pipe 14 for collection, and then be pumped to the atomizing water tank 10 by the water pump. The atomizing water tank 10 is connected to the water pipe 11 so that the water in each atomizing water tank 10 is at the same level. The water in the atomizing water tank 10 is used to supply the dust suppression atomizer 12.

[0032] It should be noted that the above content merely illustrates the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A safety protection device for deep foundation pits at construction sites, comprising a base plate (1), a fixing seat (4), and a water collection tank (13), wherein a vertical support plate (2) is fixedly connected to one side of the base plate (1) by bolts, and a plurality of anchor rods (15) are fixedly connected to the inside of the support plate (2) by bolts, and an atomizing water tank (10) and a dust suppressing atomizer (12) are fixedly connected to the top of the base plate (1), and water pipes (11) are inserted into both sides of the atomizing water tank (10), the atomizing water tank (10) provides water to the dust suppressing atomizer (12), and water channels (9) are opened on the surfaces of the base plate (1) and the support plate (2), characterized in that: Adjustment devices (3) are provided on both sides of the support plate (2), and a reinforcement mechanism (5) is movably connected to the top of the fixed seat (4). A closing mechanism (16) is provided on one side of the reinforcement mechanism (5). The adjustment device (3) is assembled to compress the spring (34) of the contact plate (32) through the soil pressure of the deep foundation pit sidewall, thereby moving the fixed shaft (33) and triggering the monitoring system (6) to increase the weight of the reinforcement mechanism (5) to apply pressure to the support plate (2); Both of the adjustment devices (3) include a fixing frame (31), which is fixedly connected to the support plate (2). A contact plate (32) is slidably connected inside the fixing frame (31). Several spring seats (35) are fixedly connected to one side of the fixing frame (31). A spring (34) is fixedly connected inside the spring seat (35). One end of the spring (34) is fixedly connected to the contact plate (32). A fixing shaft (33) is fixedly connected to one side of the contact plate (32). The fixing shaft (33) is slidably connected to the fixing frame (31). A fixing block (36) is fixedly connected to one end of the fixing shaft (33). The fixing seat (4) is fixed to the bottom of the deep foundation pit, and a support plate (41) is fixedly connected to the top of the fixing seat (4). The support plate (41) is an inclined plate. The reinforcement mechanism (5) is assembled to drive the telescopic plate (51) to move through the movement of the electric telescopic rod (52), thereby controlling the weight of the sliding water tank (53) and supporting the support plate (2); The reinforcement mechanism (5) includes a sliding water tank (53), which is slidably connected to the top of the support plate (41). One side of the sliding water tank (53) is in contact with the support plate (2). An electric telescopic rod (52) is fixedly installed inside the sliding water tank (53). A telescopic plate (51) is fixedly connected to the telescopic end of the electric telescopic rod (52). The telescopic plate (51) is slidably connected to the inside of the sliding water tank (53). A water pipe (8) is inserted into both sides of the sliding water tank (53). The monitoring system (6) is configured to detect the pressure of the slide plate (63) on the pressure sensor (62) through the processor (64) to control the stroke of the electric telescopic rod (52). When the pressure of the pressure sensor (62) increases, the electric telescopic rod (52) will retract, increasing the capacity of the sliding water tank (53) and making the weight of the sliding water tank (53) increase according to the increase of the soil pressure, thus protecting the side wall of the deep foundation pit.

2. The safety protection device for deep foundation pits at construction sites as described in claim 1, characterized in that: The closing mechanism (16) includes a support frame (161), which is fixedly connected to the inside of the sliding water tank (53). Two guide rods (162) are fixedly connected to one side of the support frame (161), and float plates (163) are slidably connected to the outer walls of the two guide rods (162). A plug (164) is fixedly connected to one side of the float plate (163).

3. A safety protection device for deep foundation pits at construction sites as described in claim 2, characterized in that: A drain pipe (7) is fixedly connected to one side of the support plate (2). A spring tube (17) is inserted into the bottom of the drain pipe (7). One end of the spring tube (17) is inserted into the top of the sliding water tank (53). The plug (164) can slide on one end of the spring tube (17).

4. A safety protection device for deep foundation pits at construction sites as described in claim 1, characterized in that: A connecting pipe (14) is inserted into one side of the water collection tank (13), and the connecting pipe (14) is connected to the drain pipe (7). A water pump is installed on one side of the water collection tank (13), the pumping end of the water pump is connected to the water collection tank (13), and the outlet end of the water pump is connected to the second water pipe (11). Two solenoid valves are installed at the outlet end of the water pump, and when one of the solenoid valves is open, the other solenoid valve is closed.

5. A safety protection device for deep foundation pits at construction sites as described in claim 1, characterized in that: The monitoring system (6) includes two extension seats (61), which are fixedly connected to the outer wall of the sliding water tank (53). A sliding plate (63) is slidably connected inside the extension seat (61). One side of the sliding plate (63) is in contact with the fixed block (36). A pressure sensor (62) is fixedly installed inside the extension seat (61). The pressure sensor (62) is fixedly connected to the sliding plate (63). A processor (64) is fixedly connected inside the extension seat (61). A liquid level sensor is fixedly installed inside the atomizing water tank (10). The liquid level sensor is electrically connected to the processor (64). The processor (64) is electrically connected to the pressure sensor (62).

6. A safety protection device for deep foundation pits at construction sites as described in claim 4, characterized in that: When the atomizing water tank (10) is full of water, a signal is transmitted to the processor (64) through the liquid level sensor, that is, one of the solenoid valves is closed to block the water source from the collection tank (13) to the atomizing water tank (10), and at the same time, the other solenoid valve is opened to transport the water in the collection tank (13) to the external water tank for processing.

7. The method of using a safety protection device for deep foundation pits at construction sites as described in claim 1, characterized in that: First, fix the base plate (1) to the side wall edge of the deep pit, fix the support plate (2) to the base plate (1) with bolts, and the support plate (2) should be in contact with the side wall of the deep pit during installation. Install the fixing seat (4) at the bottom of the deep pit, and the side of the sliding water tank (53) is in contact with the support plate (2). Rainwater enters the drainage pipe (7) from the water diversion channel (9), then enters the interior of the sliding water tank (53) through the spring pipe (17), and then enters the interior of the sliding water tank (53) through the water pipe (8), so that the water in each sliding water tank (53) is at the same level. When the soil pressure on the support plate (2) increases at a certain point on the side wall of the deep foundation pit due to construction or water pressure, the contact plate (32) will compress the spring (34), which will drive the fixed shaft (33) and the fixed block (36) to apply pressure to the sliding plate (63) and the pressure sensor (62). The processor (64) monitors the data of the pressure sensor (62) in real time, and the electric telescopic rod (52) also moves according to the data of the pressure sensor (62); that is, the capacity of the sliding water tank (53) is adjusted according to the data of the pressure sensor (62). The electric telescopic rod (52) drives the telescopic plate (51) to move, expanding the water storage capacity in the sliding water tank (53), so that the water in the adjacent sliding water tank (53) enters the sliding water tank (53) through the water pipe (8), thereby increasing the weight of the sliding water tank (53), and thus increasing the protective force on the support plate (2) at this location. The sliding water tank (53) slides on the top of the support plate (41), providing a supporting force to the support plate (2). The sliding water tank (53) has a float plate (163) that moves along the guide rod (162) along with the water source in the sliding water tank (53). When the water source in the sliding water tank (53) is filled to a certain level, the blockage (164) on the float plate (163) will block the spring tube (17), that is, no more water will enter the sliding water tank (53); thus, it will be beneficial to the water storage speed of other sliding water tanks. When all the other sliding water tanks (53) are full of water, the rainwater in the drain pipe (7) will enter the collection water tank (13) through the connecting pipe (14) for collection, and then be pumped to the atomizing water tank (10) by the water pump. The atomizing water tank (10) is connected to the water pipe (11) so that the water in each atomizing water tank (10) is at the same level. The water in the atomizing water tank (10) is used to supply the dust atomizer (12).

Images