Peripheral protection device for deep foundation pit

Abstract

The invention relates to a deep foundation pit periphery protection device, which is characterized by comprising a front bottom plate, a rear bottom plate, a top plate and a bottom plate, the rear bottom plate is hinged with the front bottom plate, and the bottom of the rear bottom plate is also provided with a fixed anchor rod; the supporting columns are vertically arranged on the front bottom plate at intervals; the fence is arranged on the rear bottom plate in a sliding mode in the front-back direction, and the bottom of the fence is further connected with the rear bottom plate in a fastened mode through connecting bolts. The supporting columns arranged front and back and the fence form a double-layer blocking structure, the double-layer energy dissipation buffering effect is achieved when the foundation pit is impacted, in addition, the fence is arranged on the rear bottom plate in a sliding mode, the sliding arrangement of the fence further has the primary energy dissipation effect, in this way, a large amount of kinetic energy can be absorbed after the foundation pit is impacted, and the effective protection effect on the foundation pit is achieved.

Description

Technical Field

[0001] The invention relates to the field of foundation pit protection construction engineering, in particular to a perimeter protection device for a deep foundation pit. Background Art

[0002] A deep foundation pit refers to an engineering project with an excavation depth exceeding 5 meters (including 5 meters), or a project with a depth of less than 5 meters but particularly complex geological conditions, surrounding environment and underground pipelines. Generally, steel pipes need to be laid on the edges. The surface of the steel pipes needs to be coated with black and yellow anti-rust paint, and skirting boards and drainage ditches of not less than 20 cm need to be set. The protective perimeter is fully enclosed and needs to be driven into the ground 50 to 70 cm to form a fixation. On the basis of construction specifications, the existing technology will also improve the peripheral protection structure. For example, the existing technology with patent number CN118208093A is an improvement made for edge protection.

[0003] However, in the prior art, the edge protection devices have low versatility, especially when facing a single project. Once the deep foundation pit project is completed, the protection device cannot be used anymore. At the same time, in the surrounding protection process, the effect of preventing vehicle collisions or providing reminders and warnings at night is poor, especially the buffering effect of the equipment is usually poor. In severe cases, it will cause damage to the fixed structure of the slope of the foundation pit, and landslides on the slope of the deep foundation pit, eventually causing safety accidents. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a deep foundation pit perimeter protection device to solve the problems that the existing protection devices are not recyclable and have poor anti-collision and buffering effects.

[0005] The technical solution to achieve the above purpose is:

[0006] The present invention provides a deep foundation pit perimeter protection device, which is characterized by comprising:

[0007] The front bottom plate has a fixing anchor rod at the bottom;

[0008] The rear bottom plate is hinged to the front bottom plate, and a fixing anchor rod is also provided at the bottom;

[0009] A plurality of pillars are erected on the front bottom plate at intervals; and

[0010] A baffle is slidably arranged on the rear bottom plate along the front-rear direction, and the bottom of the baffle is fastened to the rear bottom plate by connecting bolts.

[0011] A further improvement of the deep foundation pit perimeter protection device of the present invention is that a plurality of extension rods are provided at intervals on the front side of the front bottom plate, and the extension rods are extended forward.

[0012] A further improvement of the deep foundation pit perimeter protection device of the present invention is that an eccentric groove is provided on the front bottom plate corresponding to the support column;

[0013] A vertical connecting rod partially inserted into the eccentric groove is provided in the front bottom plate, and an end of the vertical connecting rod passes through the eccentric groove and is fixedly connected to the bottom of the corresponding support;

[0014] A transverse connecting rod fixedly connected to the other end of the vertical connecting rod is also provided in the front bottom plate, and the transverse connecting rod is fixedly connected to the end of the extension rod.

[0015] A further improvement of the deep foundation pit perimeter protection device of the present invention is that a mounting opening is provided on the front side of the front bottom plate, and a threaded connection sleeve is provided on the inner side of the front bottom plate corresponding to the mounting opening;

[0016] The corresponding end of the transverse connecting rod is threadedly connected to the threaded connection sleeve;

[0017] The end of the extension rod extends from the corresponding installation opening and is fixedly connected with the end of the transverse connecting rod.

[0018] A further improvement of the deep foundation pit perimeter protection device of the present invention is that it also includes a connecting column whose top is hinged to the transverse connecting rod, the bottom of the connecting column is in contact with the bottom of the front bottom plate, an electrode groove is provided at the rear side of the bottom of the connecting column, and an upper electrode sheet is provided in the electrode groove;

[0019] A lower electrode sheet opposite to the upper electrode sheet is provided at the bottom of the front bottom plate;

[0020] The upper electrode sheet and the lower electrode sheet are electrically connected to a buzzer arranged on the support column.

[0021] A further improvement of the deep foundation pit perimeter protection device of the present invention is that a slide groove is provided on opposite sides of the rear bottom plate, a slider is slidably provided in the slide groove, a telescopic spring supporting and connecting the slider and the rear groove wall of the slide groove is also provided in the slide groove, and the telescopic spring pushes the slider so that the slider contacts the front groove wall of the slide groove;

[0022] Support feet are provided on both sides of the enclosure, and the support feet are plug-connected with the sliding block.

[0023] A further improvement of the deep foundation pit perimeter protection device of the present invention is that an inclined stopper located behind the enclosure is provided on the rear bottom plate.

[0024] A further improvement of the deep foundation pit perimeter protection device of the present invention is that the front bottom plate and the rear bottom plate are hingedly connected via a rotating shaft, and a fracture crack is provided at the bottom of the rotating shaft.

[0025] A further improvement of the deep foundation pit perimeter protection device of the present invention is that a lighting lamp is provided on the top of the pillar;

[0026] A controller and a battery are arranged in the rear bottom plate. The battery is connected to the controller, and the controller is also connected to the lighting lamp.

[0027] A further improvement of the deep foundation pit perimeter protection device of the present invention is that a solar panel located behind the enclosure is also provided at the rear bottom plate, and the solar panel is electrically connected to the battery.

[0028] The beneficial effects of the deep foundation pit perimeter protection device of the present invention are:

[0029] The present invention forms a double-layer blocking structure through the front and rear pillars and enclosures, which has a double-layer buffering and energy dissipation effect when impacted. In addition, the enclosure is slidably arranged on the rear bottom plate, and its sliding arrangement also has a primary energy dissipation effect. Therefore, the present invention can absorb a large amount of kinetic energy after a collision and play an effective protective role on the foundation pit.

[0030] The bottom of the pillar of the front floor of the present invention is connected to the extension rod through a vertical connecting rod and a transverse connecting rod. When the pillar is hit and tilts backward, the front floor can rotate upward, and then the extension rod can be tilted upward, which can hit objects such as vehicles or cargoes, achieving the impact effect of reducing kinetic energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the deep foundation pit periphery protection device of the present invention.

[0032] Figure 2 It is a side view of the enclosure in the deep foundation pit perimeter protection device of the present invention.

[0033] Figure 3 It is a top view of the rear bottom plate of the deep foundation pit perimeter protection device of the present invention.

[0034] Figure 4 It is a cross-sectional view of the slide groove on the rear bottom plate of the deep foundation pit perimeter protection device of the present invention.

[0035] Figure 5 It is a cross-sectional view of the support column in the deep foundation pit perimeter protection device of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] See also Figure 1The present invention provides a perimeter protection device for a deep foundation pit. By designing a double-layer blocking structure at the front and rear, a buzzer arranged on the pillar can form a certain degree of early warning effect when impacted. The rear bottom plate is mainly a fixed structure, and a two-side buffer structure is arranged on the inner side of the slideway, which can absorb a large amount of kinetic energy when impacted. The perimeter protection device for a deep foundation pit of the present invention is described below in conjunction with the accompanying drawings.

[0038] See also Figure 1 , showing a three-dimensional structural schematic diagram of the deep foundation pit perimeter protection device of the present invention. Figure 1 , the deep foundation pit perimeter protection device of the present invention is described.

[0039] like Figure 1 As shown, the perimeter protection device of the deep foundation pit of the present invention comprises a front bottom plate 1, a rear bottom plate 2, pillars 401 and a fence 5. The front bottom plate 1 and the rear bottom plate 2 are hingedly connected. A fixed anchor rod 3 is provided at the bottom of the front bottom plate 1. The front bottom plate 1 can be fixed to the ground by the fixed anchor rod 3. The fixed anchor rod 3 can be driven or drilled into the soil for fixing. A fixed anchor rod 3 is also provided at the bottom of the rear bottom plate 2. Similarly, the rear bottom plate 2 can be fixed to the ground by the fixed anchor rod 3. There are a plurality of fixed anchor rods 3, which are arranged at intervals at the bottom of the front bottom plate 1 and the rear bottom plate 2. The rear side of the front bottom plate 1 is hingedly connected to the front side of the rear bottom plate 2. There are a plurality of pillars 401, which are arranged at intervals on the front bottom plate 1; the fence 5 is slidably arranged on the rear bottom plate 2 along the front-back direction. The bottom of the fence 5 is also fastened to the rear bottom plate 2 by connecting bolts 505. The fence 5 is arranged behind the plurality of pillars 401.

[0040] On the one hand, the enclosure 5 of the present invention is fastened to the rear floor 2 by the connecting bolts 505, and on the other hand, it is slidably arranged on the rear floor 2. In this way, when in use, the enclosure 5 forms a second blocking structure, and the pillar 401 is the first blocking structure. When the enclosure 5 is impacted, the force of the impact first acts on the connecting bolts 505. If the connecting bolts 505 break and the impact still exists, the enclosure 5 can slide relative to the rear floor 2 to achieve further energy absorption.

[0041] In a specific embodiment of the present invention, Figure 1 and Figure 4 As shown, a plurality of extension rods 4 are arranged at intervals on the front side of the front bottom plate 1, and the extension rods 4 are extended forward.

[0042] A plurality of extending rods 4 are arranged in an interval arrangement on the front side of the front bottom plate 1. The extending rods 4 protrude forward and can serve as another blocking structure of the protective device of the present invention. When an impact object such as a vehicle or cargo collides with the protective device, the impact object can first resist the extending rods 4, and the extending rods 4 have a blocking effect on the impact object.

[0043] Furthermore, if Figure 4 As shown, an eccentric groove 6 is opened on the front bottom plate 1 corresponding to the pillar 401; a vertical connecting rod 601 partially inserted into the eccentric groove 6 is provided in the front bottom plate 1, and the end of the vertical connecting rod 601 passes through the eccentric groove 6 and is fixedly connected to the bottom of the corresponding pillar 401; a transverse connecting rod 602 fixedly connected to the other end of the vertical connecting rod 601 is also provided in the front bottom plate 1, and the transverse connecting rod 602 is fixedly connected to the end of the extension rod 4.

[0044] The front bottom plate 1 is a box-shaped plate with a hollow interior, including an upper top plate, a lower bottom plate, a front side plate and a rear side plate. The vertical connecting rod 601 and the transverse connecting rod 602 are arranged inside the front bottom plate 1. The eccentric groove 6 is opened on the upper top plate. The center of the eccentric groove 6 is staggered with the center of the pillar 401, and the center of the eccentric groove 6 is arranged close to the rear side of the pillar 401.

[0045] The bottom of the pillar 401 is fixedly connected to the extension rod 4 through the vertical connecting rod 601 and the horizontal connecting rod 602. When the pillar 401 is hit, the pillar 401 will tilt backward with the eccentric groove 6 and the vertical connecting rod 601 as the fulcrum. If the impact force is large, the pillar 401 will fall backward, and then rotate upward with the lower base plate 1, so that the extension rod 4 will tilt upward. The extension rod 4 can make the impact object, such as a vehicle or a heavy object, tilt its head, thereby achieving the impact effect of reducing kinetic energy.

[0046] Furthermore, a mounting opening is provided at the front side of the front bottom plate 1, and a threaded connection sleeve is provided at the inner side of the front bottom plate 1 corresponding to the mounting opening, and the corresponding end of the transverse connecting rod 602 is threadedly connected to the threaded connection sleeve; the end of the extension rod 4 extends from the corresponding mounting opening and is fixedly connected to the end of the transverse connecting rod 602. The end portion of the extension rod 4 is embedded in the front bottom plate 1.

[0047] Furthermore, it also includes a connecting column 603 hinged to the transverse connecting rod 602 at the top, the bottom of the connecting column 603 is in contact with the bottom of the front bottom plate 1, and an electrode groove 604 is provided on the rear side of the bottom of the connecting column 603, and an upper electrode sheet is provided in the electrode groove 604; a lower electrode sheet opposite to the upper electrode sheet is provided at the bottom of the front bottom plate 1; the upper electrode sheet and the lower electrode sheet are electrically connected to the buzzer 402 arranged on the pillar 401.

[0048] The upper electrode sheet and the lower electrode sheet are in contact with each other to realize the control buzzer 402 to be powered on and started.

[0049] Specifically, the buzzer 402 is arranged on the upper part of the pillar 401, and the switch power line of the buzzer 402 extends into the electrode groove 604. One end of the switch power line is connected to the upper electrode sheet, and the other end is connected to the lower electrode sheet. Initially, the upper electrode sheet and the lower electrode sheet are not in contact and are separated, so that the buzzer 402 is not powered on. When the pillar 401 is hit, the force of the pillar 401 will be transmitted to the vertical connecting rod 601 and the horizontal connecting rod 602. If the impact force causes the connecting column 603 to rotate to a certain extent, that is, the electrode groove 604 is deformed to a certain extent, so that the upper electrode sheet is in contact with the lower electrode sheet, the switch power line is turned on, and the switch power line is connected to the battery. The buzzer 402 is powered on and starts to alarm.

[0050] Preferably, the top of the connecting column 603 is hinged to the middle of the transverse connecting rod 602 via a hinge support.

[0051] In a specific embodiment of the present invention, Figures 1 to 4 As shown, a slide groove 201 is provided on the opposite sides of the rear bottom plate 2, a slider 202 is slidably provided in the slide groove 201, and a telescopic spring 204 supporting and connecting the slider 202 and the rear groove wall of the slide groove 201 is also provided in the slide groove 201, and the telescopic spring 204 pushes the slider 202 so that the slider 202 contacts the front groove wall of the slide groove 201; supporting feet 501 are provided on both sides of the enclosure 5, and the supporting feet 501 are plug-connected with the slider 202.

[0052] In order to improve the structural stability of the telescopic spring 204 , a telescopic rod is provided inside the telescopic spring 204 , and the telescopic rod can support and guide the telescopic spring 204 . The telescopic rod is telescopically adjusted synchronously with the telescopic adjustment of the telescopic spring 204 .

[0053] Furthermore, the top side of the slider 202 is provided with an insertion slot 208, and the support leg 501 of the enclosure 5 is provided corresponding to the insertion slot 208, and the support leg 501 can be inserted into the insertion slot 208, and the support leg 501 and the insertion slot 208 can be further fixed by a riveting fixing structure or a press-type buckle structure. Since the enclosure 5 is provided with the support leg 501, the device of the present invention can remove the enclosure 5 after use and use it as a common guardrail, such as for protection of other openings.

[0054] A slide rail 203 is provided in the slide groove 201 , and a slider 202 is slidably provided on the slide rail 203 . The slider 202 slides forward and backward on the slide rail 203 .

[0055] In a specific embodiment of the present invention, Figure 1 , Figure 3 and Figure 4As shown, the rear bottom plate 1 is provided with an inclined stopper 205 located behind the enclosure 5. The inclined stopper 205 has an inclined surface, which is arranged on a side of the rear bottom plate 1 away from the enclosure 5.

[0056] The enclosure 5 includes a horizontal plate 502 disposed up and down and a plurality of vertical plates 503 supported between the horizontal plates 502 disposed up and down. The vertical plates 503 are disposed at intervals. A column is disposed at the end of the horizontal plate 502, and a support leg 501 is disposed at the bottom of the column. A shielding net 504 is disposed at the rear side of the horizontal plate 502, and the shielding net 504 shields the space enclosed by the horizontal plate 502 and the column. A connecting bolt 505 is disposed on the lower horizontal plate 502, and the connecting bolt 505 is threadedly connected to a threaded hole 506 on the rear bottom plate.

[0057] A groove 206 is provided on the inclined stopper 205 at a position corresponding to the vertical plate 503, and the width of the groove 206 is consistent with the width of the vertical plate 503. The inclined stopper 205 is preferably triangular.

[0058] In a specific embodiment of the present invention, Figure 1 As shown, the front bottom plate 1 and the rear bottom plate 2 are hingedly connected by a rotating shaft 101, and a fracture crack is provided at the bottom of the rotating shaft 101. The fracture crack is provided on the rotating shaft 101 to reduce the strength of the rotating shaft 101, so that the rotating shaft 101 can be tempered first when the front bottom plate 1 is impacted, and the rotating shaft 101 serves as the first breaking point. The rotating shaft 101 is a hinge structure, which is used to connect the front bottom plate 1 and the rear bottom plate 2. Preferably, the length of the fracture crack does not exceed 3 cm.

[0059] In a specific embodiment of the present invention, Figure 1 As shown, a lighting lamp 403 is provided on the top of the pillar 401; a controller and a battery are provided in the rear bottom plate 2, the battery is connected to the controller, and the controller is also connected to the lighting lamp. The controller can control the battery to supply power to the lighting lamp 403, so that the lighting lamp 403 can illuminate. The controller is used to control the on and off of the lighting lamp, and the controller also includes a light sensor to detect light, and control the lighting lamp to be turned on for lighting warning when the light is insufficient.

[0060] Further, the rear bottom plate 2 is also provided with a solar panel 207 located behind the enclosure 5, and the solar panel 207 is electrically connected to the battery. The solar panel 207 can realize solar power generation, and the generated electric energy is stored in the battery to power the lighting lamp.

[0061] Furthermore, if Figure 5 As shown, a reflective strip 404 is attached to the pillar 401 to serve as a warning.

[0062] When installing, the fixing anchor rod 3 on the rear base plate of the protective device of the present invention can be rotatably fixed in the soil. Of course, the fixing anchor rod 3 of the front base plate and the rear base plate can also be inserted into the soil and fixed by pressure from top to bottom.

[0063] The protective device of the present invention sets a rotating shaft 101 between the front bottom plate 1 and the rear bottom plate 2. The bottom of the rotating shaft 101 is provided with a breaking crack. When the front bottom plate 1 is subjected to a lateral impact, the breaking point is at the rotating shaft 101, so that the front bottom plate 1 can be directly flipped upward along the rotating shaft 101.

[0064] In normal use, the lighting lamp 403 on the pillar 401 can be turned on by the controller to light up the lighting lamp 403 to provide warning and lighting effects. The lighting lamp 403 is powered by a battery arranged on the rear bottom plate 2, and the power of the battery can be supplemented by solar power generation of the solar panel 207. The reflective strip 404 arranged on the pillar 401 can also serve as a reminder at night.

[0065] In the event of a light collision, the pillar 401 and the extension rod 4 can form a certain degree of barrier effect. In the event of a heavy collision, the rear end of the bottom of the pillar 401 is adjacent to the eccentric groove 6. When a head-on lateral load is applied, the pillar 401 will tilt backwards. Since the bottom end of the pillar 401 is connected to the extension rod 4 through the vertical connecting rod 601 and the transverse connecting rod 602, the connecting column 603 at the bottom of the transverse connecting rod 602 forms a fulcrum to transfer the kinetic energy absorbed by the pillar 401 downwards. A large-scale load impact will cause the pillar 401 to use the eccentric groove 6 as a fulcrum again, so that the impact force causes the gap at the rotating shaft 101 to break, allowing the front bottom plate 1 to rotate upwards until the front extension rod 4 tilts upwards, so that the extension rod 4 allows the impacted object, such as a vehicle or cargo, to tilt up, thereby reducing the impact effect of the kinetic energy. If there is still residual kinetic energy, the transferred kinetic energy is absorbed by the structure at the rear bottom plate 2 again.

[0066] The top sides of the rear bottom plate 2 are provided with a slide groove 201 and a slider 202 structure. Since the top of the slider 202 is provided with an insertion groove 208, a riveting fixing structure or a press-type buckle structure for fixing is provided at the insertion groove 208, that is, the column can be inserted into the slider 202 as shown in the figure. Figure 1 The rear shielding function of the type Figure 2 As shown, the bottom of the overall structure is further provided with a support leg 501, which can be used as a common guardrail after being disassembled, and can be used as protection for other openings after being used in the deep foundation pit;

[0067] When used as a device, a vertical plate 503 structure is also provided between the upper and lower horizontal plates 502 at the column, and a shielding net 503 is fixedly installed at the rear end. When fixing, the connecting bolts 505 are mainly passed through the vertical plates 503, and the connecting bolts 505 are threadedly connected to the threaded holes 506 to complete the overall fixing function. The lighting lamp 403 of the front pillar 401 can also be used as lighting at the column. To show the shielding height of the column; if a severe collision occurs, and the front bottom plate 1 structure has finished absorbing energy but still has high kinetic energy, the shielding fence at the column will constitute a barrier again, that is, the connecting bolts 505 at the shielding fence are impacted first, and the impact will cause the middle part of the shielding fence to be concave, until the connecting bolts 505 break, and the sliders 202 on both sides will move at the slide rails 203 in the slide groove 201 at this time, and the sliders 202 will cooperate with the telescopic springs 204 to form an energy absorption effect, and cooperate with the front bottom plate 1 and the connecting bolts 505 to form the third section of the overall energy absorption effect;

[0068] If the telescopic spring 204 finishes absorbing energy and kinetic energy still exists, the slider 202 will be adjacent to the inclined stopper 205 at the rear end. Because the inclined stopper 205 is located at the bottom horizontal plate 502 on the inner side of the column, the front end part of the sliders 202 at both ends that are riveted or snap-connected to the bottom end of the column will have a certain degree of fracture, and will bend with the riveted or snap-connected rear end part as the axis until the vertical plate 503 overlaps the groove 206 of the inclined stopper 205, so that the inclined stopper 205 forms a blocking effect at the bottom end. At this time, the fixed anchor rod 3 spirally inserted into the soil at the rear bottom plate 2 will also support the rear bottom plate 2, thereby forming the fourth stage of energy absorption, and finally protecting heavy objects or vehicles from entering the edge of the deep foundation pit, and completing the four-stage energy absorption to stop the entry of vehicles at a long distance.

[0069] At the same time, when the front bottom plate 1 is hit, the lateral connecting rod 602 will use the connecting column 603 as a fulcrum. At this time, the connecting column 603 as a whole, especially the electrode slot 604 at the rear end, will be subjected to greater pressure and deform, causing the electrode sheets at the upper and lower ends of the electrode slot 604 to contact each other. After contact, the buzzer 402 of the rear support 401 will be activated to issue an early warning, prompting the surrounding staff to leave the impact range and take protective measures, and it can also prompt the driver to stop driving.

[0070] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A deep foundation pit perimeter protection device, characterized in that: include: The front bottom plate has a fixing anchor rod at the bottom; The rear bottom plate is hinged to the front bottom plate, and the bottom is also provided with a fixing anchor rod; A plurality of pillars are erected on the front bottom plate at intervals; as well as A baffle is slidably arranged on the rear bottom plate along the front-rear direction, and the bottom of the baffle is fastened to the rear bottom plate by connecting bolts.

2. The deep foundation pit perimeter protection device according to claim 1, characterized in that: A plurality of extending rods are arranged at intervals on the front side of the front bottom plate, and the extending rods are extended forward.

3. The deep foundation pit perimeter protection device according to claim 2, characterized in that: An eccentric groove is provided on the front bottom plate corresponding to the support pillar; A vertical connecting rod partially inserted into the eccentric groove is provided in the front bottom plate, and an end of the vertical connecting rod passes through the eccentric groove and is fixedly connected to the bottom of the corresponding support; A transverse connecting rod fixedly connected to the other end of the vertical connecting rod is also provided in the front bottom plate, and the transverse connecting rod is fixedly connected to the end of the extension rod.

4. The deep foundation pit perimeter protection device according to claim 3, characterized in that: A mounting opening is provided on the front side of the front bottom plate, and a threaded connection sleeve is provided on the inner side of the front bottom plate corresponding to the mounting opening; The corresponding end of the transverse connecting rod is threadedly connected to the threaded connection sleeve; The end of the extension rod extends from the corresponding installation opening and is fixedly connected with the end of the transverse connecting rod.

5. The deep foundation pit perimeter protection device according to claim 2, characterized in that: It also includes a connecting column whose top is hinged to the transverse connecting rod, whose bottom contacts the bottom of the front bottom plate, and an electrode groove is provided at the rear side of the bottom of the connecting column, wherein an upper electrode sheet is provided in the electrode groove; A lower electrode sheet opposite to the upper electrode sheet is provided at the bottom of the front bottom plate; The upper electrode sheet and the lower electrode sheet are electrically connected to a buzzer arranged on the support column.

6. The deep foundation pit perimeter protection device according to claim 1, characterized in that: The rear bottom plate is provided with a slide groove at two opposite sides, a slider is slidably arranged in the slide groove, and a telescopic spring supporting and connecting the slider and the rear groove wall of the slide groove is also arranged in the slide groove, and the telescopic spring pushes the slider so that the slider contacts the front groove wall of the slide groove; Support feet are provided on both sides of the enclosure, and the support feet are plug-connected with the sliding block.

7. The deep foundation pit perimeter protection device according to claim 1, characterized in that: The rear bottom plate is provided with an inclined stopper located behind the enclosure.

8. The deep foundation pit perimeter protection device according to claim 1, characterized in that: The front bottom plate and the rear bottom plate are hingedly connected via a rotating shaft, and a fracture crack is arranged at the bottom of the rotating shaft.

9. The deep foundation pit perimeter protection device according to claim 1, characterized in that: A lighting lamp is provided on the top of the pillar; A controller and a battery are arranged in the rear bottom plate. The battery is connected to the controller, and the controller is also connected to the lighting lamp.

10. The deep foundation pit perimeter protection device according to claim 9, characterized in that: The rear bottom plate is also provided with a solar panel located behind the enclosure, and the solar panel is electrically connected to the battery.

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