Foundation pit safety protection device for building construction

Abstract

The utility model relates to a kind of building construction with foundation pit safety protection device, including multiple blocking parts and multiple alarm parts, multiple the blocking part is fixed in the top of the foundation pit wall and sequentially arranged along the edge of the top of the foundation pit wall, the blocking part is used to form blocking in the edge of the top of the foundation pit wall, every two adjacent the blocking part corresponds one alarm part, one of the blocking part in two adjacent the blocking part relative to another blocking part moves a certain distance in vertical direction, and corresponding alarm part sends alarm. Since the above technical solution is adopted, the building construction with foundation pit safety protection device of the utility model can not only form blocking to the edge of the top of the foundation pit wall, but also has the function of monitoring and early warning for the deformation of the foundation pit wall, which can further improve the safety of foundation pit construction.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a safety protection device for foundation pits in building construction. Background Technology

[0002] An excavation pit is a pit dug according to the foundation design location, base elevation, and foundation dimensions. Excavation pit construction is a common task in construction. For excavation pits with a depth exceeding 2 meters, the top edge of the pit wall must be protected to reduce the possibility of workers accidentally falling into the pit. Furthermore, in the construction of some deeper pits, the pit wall also needs to be supported to reduce the possibility of collapse. However, for excavation pits in locations with poor geological conditions, even with support, the pit wall can still gradually deform and collapse.

[0003] Currently, guardrails installed at the top edge of the pit wall are commonly used as safety protection devices for the pit. Although the guardrails can block the top edge of the pit wall to achieve the purpose of safety protection, the existing guardrails have a single function, only serving as a barrier and unable to monitor and warn of pit wall deformation. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a safety protection device for foundation pits in building construction, so as to solve the technical problem that existing safety protection devices for foundation pits can only play a blocking role and cannot monitor and warn of the deformation of the foundation pit wall.

[0005] This utility model is achieved through the following technical solution:

[0006] A safety protection device for foundation pits in building construction includes multiple blocking parts and multiple alarm parts. The multiple blocking parts are fixed to the top of the foundation pit wall and arranged sequentially along the edge of the top of the foundation pit wall. The blocking parts are used to form a block at the edge of the top of the foundation pit wall. Each pair of adjacent blocking parts corresponds to one alarm part. When one of the two adjacent blocking parts moves a certain distance in the vertical direction relative to the other blocking part, the corresponding alarm part sounds an alarm.

[0007] Furthermore, the alarm unit includes a first plate, a second plate, a first power supply, and a first alarm. Both the first plate and the second plate are made of conductive material. The first plate is fixed on one of the blocking parts. There are two second plates, and both second plates are fixed on another blocking part adjacent to the blocking part where the first plate is located. The two second plates are located above and below the first plate, respectively. The projections of the two second plates on a horizontal plane coincide with the projection of the first plate on the horizontal plane.

[0008] The positive terminal of the first power supply is electrically connected to the positive terminal of the first alarm, the negative terminal of the first power supply is electrically connected to both of the second plates, and the negative terminal of the first alarm is electrically connected to the first plate.

[0009] Furthermore, the alarm unit also includes a first insulating block and a second insulating block, the first insulating block being bonded and fixed to one of the blocking parts, and the second insulating block being bonded and fixed to another blocking part adjacent to the blocking part where the first insulating block is located;

[0010] The first plate is fixed on the first insulating block, and both second plates are fixed on the second insulating block.

[0011] Furthermore, the alarm unit also includes a rubber tube, one end of which is sealed and fixed to the first insulating block, and the other end of which is sealed and fixed to the second insulating block. A wire hole is formed on the lower side wall of the rubber tube.

[0012] The first plate and the two second plates corresponding to the first plate are all located inside the corresponding rubber cylinder.

[0013] Furthermore, a window is provided on the side wall of the rubber cylinder, and a transparent plastic film is fixed inside the window to seal the window.

[0014] Furthermore, the alarm unit includes a rod, a cylinder, a second power supply, and a second alarm. Both the rod and the cylinder are horizontally arranged and made of conductive material. The rod is fixed to one of the blocking parts, and the cylinder is fixed to another blocking part adjacent to the blocking part where the rod is located. The cylinder is sleeved on the rod, and there is a gap between the inner wall of the cylinder and the outer surface of the rod.

[0015] The positive terminal of the second power supply is electrically connected to the positive terminal of the second alarm, the negative terminal of the second power supply is electrically connected to the cylinder, and the negative terminal of the second alarm is electrically connected to the rod.

[0016] Furthermore, a sealing block is fixed inside the cylinder, the sealing block is integrally formed with the cylinder, the sealing block is located on the side of the rod body opposite to the other end of the rod body at one end inside the cylinder, the sealing block is spaced apart from the rod body, and the sealing block is a conductor.

[0017] Furthermore, a first convex ring protrudes inward from the inner circumferential surface of the cylinder, and there is a gap between the inner wall of the first convex ring and the outer surface of the rod. A second convex ring protrudes outward from the outer circumferential surface of the rod, and there is a gap between the outer circumferential surface of the second convex ring and the inner circumferential surface of the cylinder. The diameter of the second convex ring is larger than the diameter of the inner hole of the first convex ring. The second convex ring is located between the sealing block and the first convex ring, and the second convex ring is spaced apart from the first convex ring. Both the first convex ring and the second convex ring are conductors.

[0018] Furthermore, the blocking part includes a fixing seat, a square frame, and a steel mesh. The fixing seat is used to fix it to the top of the pit wall. The square frame is fixed on the fixing seat and arranged vertically. The steel mesh is fixed inside the square frame and cooperates with the square frame.

[0019] Furthermore, the fixing base includes a vertical pole and a base plate fixed to the lower end of the vertical pole, and the base plate has a plurality of mounting holes.

[0020] The beneficial effects of this utility model are as follows:

[0021] During the settlement and deformation process of the foundation pit wall at a location corresponding to a blocking part, the blocking part will move a certain distance vertically relative to another adjacent blocking part. At this time, the alarms corresponding to the two adjacent blocking parts will sound an alarm, enabling construction workers to promptly detect the deformation of the foundation pit wall and focus on further supporting the deformed area, thereby further improving the safety of foundation pit construction. In addition to blocking the top edge of the foundation pit wall, the foundation pit safety protection device for building construction described in this utility model also has the function of monitoring and warning of foundation pit wall deformation, further improving the safety of foundation pit construction.

[0022] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0023] Figure 1This is a structural schematic diagram of a preferred embodiment of the safety protection device for foundation pits in building construction according to the present invention.

[0024] Figure 2 for Figure 1 Enlarged view of 'a' in the middle;

[0025] Figure 3 for Figure 1 Enlarged view of b in the middle;

[0026] Figure 4 This is a structural diagram of the alarm unit in a preferred embodiment of the foundation pit safety protection device for building construction of this utility model, in which the first alarm and the first power supply are omitted.

[0027] Figure 5 This is a top view of a preferred embodiment of the safety protection device for foundation pits in building construction, in which the first alarm and the first power supply are omitted from the alarm unit.

[0028] Figure 6 for Figure 5 AA section view;

[0029] Figure 7 This is a diagram illustrating the usage state of a preferred embodiment of the safety protection device for foundation pits in building construction according to this utility model.

[0030] Figure 8 for Figure 7 Enlarged view of C in the middle;

[0031] Figure 9 for Figure 7 Enlarged view of d in the middle;

[0032] Figure 10 This is a top view of another preferred embodiment of the safety protection device for foundation pits in building construction, where the alarm unit omits the second alarm and the second power supply.

[0033] Figure 11 for Figure 10 BB section view;

[0034] Figure 12 This is a top view of a preferred embodiment of the safety protection device for foundation pits in building construction, where the alarm unit omits the second alarm and the second power supply.

[0035] Figure 13 for Figure 12 CC section view.

[0036] In the diagram: First plate - 1; Second plate - 2; First insulating block - 3; and Second insulating block - 4; Rubber tube - 5; Wire hole - 6; Window - 7; Plastic film - 8; Square frame - 9; Steel mesh - 10; Upright pole - 11; Base plate - 12; Mounting hole - 13; Concrete base - 14; Anchor bolt - 15; Pole - 16; Cylinder - 17; Sealing block - 18; First convex ring - 19; Second convex ring - 20. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0042] Example 1

[0043] Please see Figure 1-9This utility model provides a technical solution: a safety protection device for foundation pits in building construction, including multiple blocking parts and multiple alarm parts. The multiple blocking parts are fixed on the top of the foundation pit wall and arranged sequentially along the edge of the top of the foundation pit wall. The blocking parts are used to form a block at the edge of the top of the foundation pit wall. Each pair of adjacent blocking parts corresponds to one alarm part. When one of the two adjacent blocking parts moves a certain distance in the vertical direction relative to the other blocking part, the corresponding alarm part sounds an alarm.

[0044] When using the construction pit safety protection device of this utility model, multiple blocking parts are fixed to the ground at the top of the pit wall, and arranged sequentially along the edge of the top of the pit wall. When fixing the multiple blocking parts to the ground at the top of the pit wall, it is necessary to ensure that the gap between any two adjacent blocking parts is impassable. Specifically, the distance between any two adjacent blocking parts should be 3cm-8cm. After fixing the multiple blocking parts to the ground at the top of the pit wall, they form a barrier at the top edge of the pit wall, reducing the possibility of construction workers accidentally falling into the pit from the top edge. The construction pit safety protection device of this utility model thus achieves the purpose of safety protection.

[0045] During the settlement and deformation process of the foundation pit wall at the location corresponding to a blocking part, the blocking part will move a certain distance in the vertical direction relative to another adjacent blocking part. At this time, the alarm corresponding to the two adjacent blocking parts will sound an alarm, so that the construction workers can promptly detect the deformation of the foundation pit wall and focus on further supporting the deformed part of the foundation pit wall, which can further improve the safety of foundation pit construction.

[0046] The safety protection device for foundation pits in this invention not only blocks the top edge of the foundation pit wall, but also monitors and warns of foundation pit wall deformation, thereby further improving the safety of foundation pit construction.

[0047] In this embodiment, the alarm unit includes a first plate 1, a second plate 2, a first power supply (not shown in the figure), and a first alarm (not shown in the figure). The first plate 1 and the second plate 2 are both made of conductive material. Specifically, the first plate 1 and the second plate 2 are both made of copper or aluminum. The first plate 1 is fixed on one of the blocking parts. There are two second plates 2, and each of the two second plates 2 is fixed on another blocking part adjacent to the blocking part where the first plate 1 is located. The two second plates 2 are respectively located above and below the first plate 1. The projections of the two second plates 2 on a horizontal plane coincide with the projection of the first plate 1 on the horizontal plane. The first plate 1 is insulated from the corresponding blocking part, and the second plate 2 is insulated from the corresponding blocking part.

[0048] The first power source can be a lithium battery. The positive terminal of the first power source is electrically connected to the positive terminal of the first alarm, and the negative terminal of the first power source is electrically connected to both second plates 2. The first alarm can be an audible and visual alarm of model SL-125R, and the negative terminal of the first alarm is electrically connected to the first plate 1. Specifically, the positive terminal of the first power source is electrically connected to the positive terminal of the first alarm, the negative terminal of the first power source is electrically connected to both second plates 2, and the negative terminal of the first alarm is electrically connected to the first plate 1 via wires.

[0049] During the settlement and deformation process at the location of a blocking part in the foundation pit wall, when the blocking part moves a certain distance vertically relative to another adjacent blocking part, the first plate 1 can move a certain distance vertically along with the corresponding blocking part. The first plate 1 can then contact the second plate 2 located above or below it. At this time, the positive terminal of the first alarm is connected to the positive terminal of the first power supply, and the negative terminal of the first alarm is also connected to the negative terminal of the first power supply, energizing the first alarm and triggering an alarm. With this structure, when one of two adjacent blocking parts moves a certain distance vertically relative to the other, the corresponding alarm part can trigger an alarm.

[0050] In this embodiment, the alarm unit further includes a first insulating block 3 and a second insulating block 4. Both the first insulating block 3 and the second insulating block 4 are made of insulating material. Specifically, both the first insulating block 3 and the second insulating block 4 can be made of plastic. The first insulating block 3 is bonded and fixed to one of the blocking parts, and the second insulating block 4 is bonded and fixed to another blocking part adjacent to the blocking part where the first insulating block 3 is located. Specifically, the first insulating block 3 is bonded and fixed to one of the blocking parts with strong adhesive, and the second insulating block 4 is bonded and fixed to another blocking part with strong adhesive.

[0051] The first plate 1 is fixed on the first insulating block 3, and the two second plates 2 are both fixed on the second insulating block 4.

[0052] When installing the foundation pit safety protection device for construction as described in this utility model, firstly, fix all the multiple blocking parts to the ground at the top of the foundation pit wall. Then, glue and fix the first insulating block 3 to the corresponding blocking part, and glue and fix the second insulating block 4 to the corresponding blocking part. After gluing and fixing the first insulating block 3 to the corresponding blocking part, when gluing and fixing the second insulating block 4 to the corresponding blocking part, first adjust the vertical position of the second insulating block 4 so that the two second plates 2 on the second insulating block 4 are respectively located directly above and directly below the first plate 1 on the first insulating block 3, and make the distance between the two second plates 2 and the first plate 1 approximately the same. Then, glue and fix the second insulating block 4 to the corresponding blocking part with strong adhesive. When installing the foundation pit safety protection device for construction as described in this utility model, it is relatively convenient to make the distance between the two second plates 2 and the first plate 1 approximately the same.

[0053] The first plate 1 is fixed to the corresponding blocking part by an insulating first insulating block 3, and the second plate 2 is fixed to the corresponding blocking part by an insulating second insulating block 4. With this structure, the first plate 1 can be insulated from the corresponding blocking part, and the second plate 2 can be insulated from the corresponding blocking part.

[0054] In this embodiment, the alarm unit further includes a rubber cylinder 5. One end of the rubber cylinder 5 is sealed and fixed to the first insulating block 3, meaning that one end of the rubber cylinder 5 is fixed to the first insulating block 3, and water and air cannot pass through the connection between the one end of the rubber cylinder 5 and the first insulating block 3. Specifically, the one end of the rubber cylinder 5 can be fixed to the first insulating block 3 by adhesive bonding. The other end of the rubber cylinder 5 is sealed and fixed to the second insulating block 4, meaning that the other end of the rubber cylinder 5 is fixed to the second insulating block 4, and water and air cannot pass through the connection between the other end of the rubber cylinder 5 and the second insulating block 4. Specifically, the other end of the rubber cylinder 5 can be fixed to the second insulating block 4 by adhesive bonding. A wire hole 6 is formed on the lower side wall of the rubber cylinder 5; the first plate 1 and the two second plates 2 corresponding to the first plate 1 are both located inside the corresponding rubber cylinder 5.

[0055] The rubber sleeve 5 protects the first plate 1 and the second plate 2 located inside it, making them less susceptible to rainwater erosion. When the negative terminal of the first power source and the second plate 2 are electrically connected by wires, and when the negative terminal of the alarm and the first plate 1 are electrically connected by wires, the wires can be passed through the wire hole 6 into the rubber sleeve 5.

[0056] In this embodiment, a window 7 is provided on the side wall of the rubber cylinder 5, and a transparent plastic film 8 is fixed inside the window 7 to close the window 7.

[0057] After the first insulating block 3 is glued and fixed to the corresponding blocking part, when adjusting the vertical position of the second insulating block 4, it is convenient to observe the relative position of the two second plates 2 and the first plate 1 through the window 7, so as to make the distance between the two second plates 2 and the first plate 1 approximately the same. The plastic film 8 can seal the window 7, preventing rainwater from entering the rubber cylinder 5 through the window 7.

[0058] In this embodiment, the blocking part includes a fixing base, a square frame 9, and a steel mesh 10. The fixing base is used to fix it to the top of the pit wall. The square frame 9 is fixed on the fixing base and arranged vertically. The steel mesh 10 is fixed inside the square frame 9, and the steel mesh 10 cooperates with the square frame 9. Fixing the fixing base to the ground at the top of the pit wall can fix the blocking part to the top wall of the pit wall. After fixing the fixing base to the ground at the top of the pit wall, the square frame 9 and the steel mesh 10 can form a barrier at the top edge of the pit wall. The spacing between each pair of adjacent blocking parts should preferably be 3cm-8cm. Specifically, the spacing between each pair of adjacent square frames 9 should preferably be 3cm-8cm.

[0059] In this embodiment, the fixing base includes an upright 11 and a base plate 12 fixed to the lower end of the upright 11. The base plate 12 has multiple mounting holes 13. Before installing the upright 11 on the ground above the pit wall, a concrete base 14 is poured at the location where the fixing base needs to be installed on the ground above the pit wall, and anchor bolts 15 are pre-embedded in the concrete base 14 at positions corresponding to the mounting holes 13. When the upright 11 is installed on the ground above the pit wall, the base plate 12 and the upright 11 can be fixed to the ground above the pit wall through the mounting holes 13 and their corresponding anchor bolts 15. The fixing base is thus fixed to the top of the pit wall.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 is that the structure of the alarm unit is different, while the rest are the same as in Embodiment 1.

[0062] For details, please refer to Figure 10-11 In this embodiment, the alarm unit includes a rod 16, a cylinder 17, a second power supply (not shown in the figure), and a second alarm (not shown in the figure). Both the rod 16 and the cylinder 17 are horizontally arranged and are made of conductive material. Specifically, both the rod 16 and the cylinder 17 are made of copper or aluminum. The rod 16 is fixed to one of the blocking parts, and the cylinder 17 is fixed to another blocking part adjacent to the blocking part where the rod 16 is located. The cylinder 17 is sleeved on the rod 16, and there is a gap between the inner wall of the cylinder 17 and the outer surface of the rod 16. The rod 16 is insulated from the corresponding blocking part, and the cylinder 17 is insulated from the corresponding blocking part. Specifically, the rod 16 can also be fixed to the corresponding blocking part by a first insulating block made of plastic, and the cylinder 17 can also be fixed to the corresponding blocking part by a second insulating block made of plastic.

[0063] The second power source can also be a lithium battery. The positive terminal of the second power source is electrically connected to the positive terminal of the second alarm, and the negative terminal of the second power source is electrically connected to the cylinder 17. The first alarm can also be a sound and light alarm of model SL-125R. The negative terminal of the second alarm is electrically connected to the rod 16. Specifically, the positive terminals of the second power source and the second alarm are electrically connected, as are the negative terminals of the second power source and the cylinder 17, and the negative terminals of the second alarm and the rod 16, respectively, via wires.

[0064] During the settlement and deformation process at the location of a blocking part in the foundation pit wall, when the blocking part moves a certain distance vertically relative to another adjacent blocking part, the rod 16 can move a certain distance vertically along with the corresponding blocking part. The rod 16 can contact the upper or lower side wall of the cylinder 17. At this time, the positive terminal of the second alarm is connected to the positive terminal of the second power supply, and the negative terminal of the second alarm can also be connected to the negative terminal of the second power supply. The second alarm is powered on and sounds an alarm. With this structure, when one of the two adjacent blocking parts moves a certain distance vertically relative to the other blocking part, the corresponding alarm part can also sound an alarm.

[0065] When the pit wall deforms, and the position of the top surface of the pit wall corresponding to one of the aforementioned blocking parts moves towards or away from the center of the pit relative to the position of another blocking part adjacent to that blocking part, the rod 16 can move relative to the cylinder 17 towards or away from the center of the pit. After the rod 16 moves a certain distance relative to the cylinder 17, it can contact the side wall of the cylinder 17 near the center of the pit or the side wall of the cylinder 17 away from the center of the pit. At this time, the positive terminal of the second alarm is connected to the positive terminal of the second power supply, and the negative terminal of the second alarm is also connected to the negative terminal of the second power supply. The second alarm is powered on and sounds an alarm.

[0066] With this structure, the foundation pit safety protection device for building construction described in this utility model can not only monitor and warn of the vertical deformation of the foundation pit wall, but also monitor and warn of the deformation of the foundation pit wall towards the middle of the foundation pit and the deformation away from the middle of the foundation pit, thus enabling more comprehensive monitoring and early warning of the deformation of the foundation pit wall.

[0067] In this embodiment, a sealing block 18 is fixed inside the cylinder 17. The sealing block 18 is integrally formed with the cylinder 17. The sealing block 18 is located on the side of the rod 16 located inside the cylinder 17, facing away from the other end of the rod 16. The sealing block 18 is spaced apart from the rod 16. The sealing block 18 is a conductor. Specifically, the sealing block 18 is made of copper or aluminum.

[0068] When the pit wall undergoes compressive deformation in a direction parallel to the top edge of the pit wall, that is, when the position of the top ground of the pit wall corresponding to one of the blocking parts moves toward the position of the top ground of the pit wall corresponding to another blocking part adjacent to the blocking part, the rod 16 can move further into the cylinder 17 relative to the cylinder 17. After the rod 16 is further inserted into the cylinder 17 by a certain distance, the rod 16 can contact the sealing block 18. At this time, the positive terminal of the second alarm is connected to the positive terminal of the second power supply, and the negative terminal of the second alarm can also be connected to the negative terminal of the second power supply. The second alarm is powered on and sounds an alarm.

[0069] With this structure, the construction pit safety protection device of this utility model can also monitor and warn of the compression deformation of the pit wall in the direction parallel to the top edge of the pit wall, and can more comprehensively monitor and warn of the deformation of the pit wall.

[0070] Example 3

[0071] The difference between this embodiment and Embodiment 2 is that the structure of the alarm unit is different, while the rest are the same as in Embodiment 2.

[0072] For details, please refer to Figure 12-13 In this embodiment, a first convex ring 19 protrudes inward from the inner circumferential surface of the cylinder 17. The inner wall of the first convex ring 19 is spaced from the outer surface of the rod 16. A second convex ring 20 protrudes outward from the outer circumferential surface of the rod 16. The outer circumferential surface of the second convex ring 20 is spaced from the inner circumferential surface of the cylinder 17. The diameter of the second convex ring 20 is larger than the diameter of the inner hole of the first convex ring 19. The second convex ring 20 is located between the sealing block 18 and the first convex ring 19. The second convex ring 20 and the first convex ring 19 are spaced apart. Both the first convex ring 19 and the second convex ring 20 are conductors. Specifically, both the first convex ring 19 and the second convex ring 20 are made of copper or aluminum.

[0073] When the pit wall undergoes tensile deformation in a direction parallel to the top edge of the pit wall, that is, when the position of the top ground of the pit wall corresponding to one of the blocking parts moves away from the position of the top ground of the pit wall corresponding to another blocking part adjacent to the blocking part, the rod 16 can move relative to the cylinder 17 in the direction of being pulled out of the cylinder 17. After the rod 16 is pulled out of the cylinder 17 a certain distance, the second convex ring 20 can contact the first convex ring 19. At this time, the positive terminal of the second alarm is connected to the positive terminal of the second power supply, and the negative terminal of the second alarm can also be connected to the negative terminal of the second power supply. The second alarm is powered on and sounds an alarm.

[0074] With this structure, the foundation pit safety protection device for building construction described in this utility model can also monitor and warn of the tensile deformation of the foundation pit wall in the direction parallel to the top edge of the foundation pit wall, and can more comprehensively monitor and warn of the deformation of the foundation pit wall.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A safety protection device for foundation pits in building construction, characterized in that: It includes multiple blocking parts and multiple alarm parts. The multiple blocking parts are fixed on the top of the pit wall and arranged sequentially along the edge of the top of the pit wall. The blocking parts are used to form a block at the edge of the top of the pit wall. Each pair of adjacent blocking parts corresponds to one alarm part. When one of the two adjacent blocking parts moves a certain distance in the vertical direction relative to the other blocking part, the corresponding alarm part will sound an alarm. The alarm unit includes a first plate, a second plate, a first power supply, and a first alarm. Both the first plate and the second plate are made of conductive material. The first plate is fixed on one of the blocking parts. There are two second plates, and both second plates are fixed on another blocking part adjacent to the blocking part where the first plate is located. The two second plates are located above and below the first plate, respectively. The projections of the two second plates on a horizontal plane coincide with the projection of the first plate on the horizontal plane. The positive terminal of the first power supply is electrically connected to the positive terminal of the first alarm, the negative terminal of the first power supply is electrically connected to both of the second plates, and the negative terminal of the first alarm is electrically connected to the first plate. The blocking part includes a fixed base, a square frame, and a steel mesh. The fixed base is used to fix it to the top of the pit wall. The square frame is fixed on the fixed base and arranged vertically. The steel mesh is fixed inside the square frame and cooperates with the square frame.

2. The safety protection device for foundation pits in building construction according to claim 1, characterized in that: The alarm unit further includes a first insulating block and a second insulating block. The first insulating block is bonded and fixed to one of the blocking parts, and the second insulating block is bonded and fixed to another blocking part adjacent to the blocking part where the first insulating block is located. The first plate is fixed on the first insulating block, and both second plates are fixed on the second insulating block.

3. The safety protection device for foundation pits in building construction according to claim 2, characterized in that: The alarm unit also includes a rubber tube, one end of which is sealed and fixed to the first insulating block, and the other end of which is sealed and fixed to the second insulating block. A wire hole is formed on the lower side wall of the rubber tube. The first plate and the two second plates corresponding to the first plate are all located inside the corresponding rubber cylinder.

4. The safety protection device for foundation pits in building construction according to claim 3, characterized in that: A window is provided on the side wall of the rubber cylinder, and a transparent plastic film is fixed inside the window to seal the window.

5. The safety protection device for foundation pits in building construction according to claim 1, characterized in that: The alarm unit includes a rod, a cylinder, a second power supply, and a second alarm. Both the rod and the cylinder are horizontally arranged and made of conductive material. The rod is fixed to one of the blocking parts, and the cylinder is fixed to another blocking part adjacent to the blocking part where the rod is located. The cylinder is sleeved on the rod, and there is a gap between the inner wall of the cylinder and the outer surface of the rod. The positive terminal of the second power supply is electrically connected to the positive terminal of the second alarm, the negative terminal of the second power supply is electrically connected to the cylinder, and the negative terminal of the second alarm is electrically connected to the rod.

6. The safety protection device for foundation pits in building construction according to claim 5, characterized in that: A sealing block is fixed inside the cylinder. The sealing block is integrally formed with the cylinder. The sealing block is located on the side of the rod body opposite to the other end of the rod body, at one end inside the cylinder. The sealing block is spaced apart from the rod body. The sealing block is a conductor.

7. The safety protection device for foundation pits in building construction according to claim 6, characterized in that: The inner circumferential surface of the cylinder protrudes inward to form a first convex ring, and there is a gap between the inner hole wall of the first convex ring and the outer surface of the rod. The outer circumferential surface of the rod protrudes outward to form a second convex ring, and there is a gap between the outer circumferential surface of the second convex ring and the inner circumferential surface of the cylinder. The diameter of the second convex ring is larger than the diameter of the inner hole of the first convex ring. The second convex ring is located between the sealing block and the first convex ring. The second convex ring and the first convex ring are spaced apart. Both the first convex ring and the second convex ring are conductors.

8. The safety protection device for foundation pits in building construction according to claim 1, characterized in that: The mounting base includes a vertical pole and a base plate fixed to the lower end of the vertical pole, and the base plate has multiple mounting holes.

Images