A foundation pit support device for building construction

Abstract

This invention relates to the field of building construction technology, and more particularly to a foundation pit support device for building construction. It includes retaining plates and telescopic screws, with the telescopic screws positioned between two retaining plates. Each end of the telescopic screw is connected to a positioning block, and the positioning blocks have circular holes. The retaining plates are equipped with guide frames, the number of which matches the number of telescopic screws. This invention, through the design of telescopic screws, positioning blocks, guide frames, sleeves, movable columns, and sliding frames, achieves rapid assembly and disassembly of the foundation pit support device, greatly simplifying the installation and dismantling process, significantly improving construction efficiency, and effectively reducing the labor intensity of workers. Furthermore, during the insertion or removal of the device from the foundation pit, the roller and flat belt design transforms traditional sliding friction into rolling friction, significantly reducing the friction between the outer side of the device and the soil. This prevents the surrounding soil from loosening, falling off, or even collapsing due to excessive friction, thus improving the safety of foundation pit construction.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a foundation pit support device for building construction. Background Technology

[0002] In the construction process, foundation pit support devices are crucial equipment for ensuring the safety of underground engineering construction. Their main function is to support the sidewalls of the foundation pit, prevent soil collapse, ensure the safety of construction personnel and equipment, and provide a stable working environment for subsequent underground structure construction. Traditional foundation pit support devices typically consist of two retaining plates and several horizontal struts. In actual use, workers need to use bolts to fix the horizontal struts between the two retaining plates to form an integral support structure.

[0003] However, this traditional support device has obvious drawbacks: First, the assembly and disassembly operations using bolt connections are cumbersome, which not only increases the labor intensity of workers but also reduces construction efficiency. Especially when the construction site conditions are complex and tools are limited, the installation and removal of bolts are particularly inconvenient, affecting the progress of the entire project. Second, when the existing foundation pit support device is placed into or removed from the foundation pit, the friction between the outer side of the device and the soil is large, which can easily cause a large amount of surrounding soil to loosen, resulting in a large amount of local soil loss, and in severe cases, it can even cause the entire foundation pit to collapse. Summary of the Invention

[0004] In view of this, the present invention provides a foundation pit support device for building construction, which can solve the problems of cumbersome assembly and disassembly operations of traditional support devices, which not only increases the labor intensity of workers but also reduces construction efficiency. Furthermore, traditional support devices have greater friction between the outer side and the soil, which makes it easy for a large amount of soil to fall off.

[0005] The technical implementation of this invention is as follows: A foundation pit support device for building construction includes retaining plates and telescopic screws. A telescopic screw is provided between two retaining plates, and positioning blocks are connected to both ends of the telescopic screw. Circular holes are provided on the positioning blocks. Guide frames, matching the number of telescopic screws, are provided on the retaining plates. The guide frames guide and limit the positioning blocks. Sleeves are spaced apart on the retaining plates, and movable columns are slidably installed inside the sleeves. The movable columns are used to lock the positioning blocks by engaging with the circular holes. A first spring connects the movable column to the inner side of the sleeve. A trapezoidal hole is provided on the movable column. A sliding frame is slidably installed on the retaining plate, and an insert plate is connected to the sliding frame. The insert plate is inserted into the trapezoidal hole of the movable column, and by pressing the movable column out of the circular hole, the locking of the movable column to the positioning blocks is released. Two rollers are provided on the retaining plates, and a flat belt is provided between the two rollers. The flat belt is used to contact the soil in the foundation pit.

[0006] Furthermore, it also includes scrapers, which are installed on the retaining plate and are used to scrape off the soil from the surface of the flat belt.

[0007] Furthermore, it also includes sponge blocks, which are installed on the scraper and are used to absorb liquid on the surface of the flat belt.

[0008] Furthermore, it also includes a fixing mechanism, which includes a connecting frame, a first electric push rod, a movable cylinder, a second spring, and a pointed cone. The connecting frame is installed on the retaining plate, and the first electric push rod is set on the connecting frame. The movable cylinder is slidably set on the telescopic rod of the first electric push rod. The second spring is connected between the inner side of the movable cylinder and the telescopic rod of the first electric push rod. The pointed cone is connected to the movable cylinder and is used to insert into the soil.

[0009] Furthermore, it also includes a limiting plate, which is connected to the first electric push rod. A groove is provided on the inner side of the movable cylinder, and the limiting plate slides in the groove.

[0010] Furthermore, it also includes a hooking mechanism, which includes a guide rod, a movable block, a third spring, and a connecting block. The guide rod is provided inside the movable cylinder, and the movable blocks are symmetrically slidably arranged on the guide rod. The third spring is connected between the movable blocks on both sides of the guide rod. The connecting block is connected to the telescopic rod of the first electric push rod. The connecting block is used to squeeze the movable blocks on the guide rod.

[0011] Furthermore, it also includes a support mechanism, which includes a fixed frame, a pressure sensor, a controller, a rotating plate, a support frame, a second electric push rod, a support block, a triangular block, a locking block, and a fourth spring. The fixed frame and controller are installed on the retaining plate. The pressure sensor is connected to the fixed frame. The rotating plate is rotatably installed on the fixed frame. The support frame is slidably installed on the rotating plate. The second electric push rod is rotatably installed on the retaining plate. The telescopic rod of the second electric push rod is rotatably connected to the rotating plate. The support block is installed on the retaining plate to support the support frame. Triangular blocks are spaced apart inside the rotating plate. The locking block is slidably installed on the support frame. The triangular blocks contact the locking block. The fourth spring connects the locking block and the support frame.

[0012] Furthermore, it also includes a movable frame, which is slidably mounted on the support frame and is used to squeeze the card block to move.

[0013] The present invention has the following advantages: 1. By setting up structures such as telescopic screws, positioning blocks, guide frames, sleeves, movable columns and sliding frames, the present invention realizes the rapid assembly and disassembly of the foundation pit support device, which greatly simplifies the installation and dismantling process, significantly improves construction efficiency, and effectively reduces the labor intensity of workers. Moreover, during the process of placing or removing the device into the foundation pit, the design of the roller and flat belt transforms the traditional sliding friction into rolling friction, which greatly reduces the friction between the outer side of the device and the soil, thereby preventing the surrounding soil from loosening, falling off or even collapsing due to excessive friction, and improving the safety of foundation pit construction.

[0014] 2. The present invention can automatically remove dirt and liquid adhering to the surface of the flat belt by setting up scrapers and sponge blocks, ensuring that the flat belt remains clean during the circulation process, avoiding dirt accumulation from affecting equipment operation, and also helping to extend the service life of the equipment.

[0015] 3. The support mechanism of this invention combines a pressure sensor, a controller, and an electric push rod to achieve real-time monitoring and response to the stress on the retaining plate. When the pressure on the retaining plate exceeds a set threshold, the system automatically unfolds the support frame and locks it, thereby timely distributing the pressure on the retaining plate, preventing serious deformation, and ensuring construction safety. Moreover, after completing the temporary support task, the locking block can be released by manually lifting the movable frame, and the electric push rod can be used to drive the rotating plate and support frame to return to the retracted state, facilitating subsequent passage and operation for construction personnel, and also facilitating equipment maintenance and reuse. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the guide frame, sleeve, and sliding frame of the present invention.

[0018] Figure 3 This is a structural separation diagram of the positioning block and guide frame of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the movable column, the first spring, and the insert plate of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the retaining plate, flat belt and scraper of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the roller, scraper, and sponge block of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the connecting frame, fixing frame, and controller of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the fixing mechanism and the supporting mechanism of the present invention.

[0024] Figure 9 This is a cross-sectional view of the fixing mechanism of the present invention.

[0025] Figure 10 This is a three-dimensional structural diagram of the hooking mechanism of the present invention.

[0026] Figure 11 This is a structural separation diagram of the rotating plate and support frame of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram of the card block and the fourth spring of the present invention.

[0028] The meanings of the reference numerals in the diagram are as follows: 1: retaining plate, 2: telescopic screw, 3: positioning block, 4: round hole, 5: guide frame, 6: sleeve, 7: movable column, 8: first spring, 9: trapezoidal hole, 10: sliding frame, 11: insert plate, 12: roller, 13: flat belt, 14: scraper, 15: sponge block, 16: connecting frame, 17: first electric push rod, 18: movable cylinder, 19: second spring, 20: pointed cone, 21: limiting plate, 22: slide groove, 23: guide rod, 24: movable block, 25: third spring, 26: connecting block, 27: fixed frame, 28: pressure sensor, 29: controller, 30: rotating plate, 31: support frame, 32: second electric push rod, 33: support block, 34: triangular block, 35: locking block, 36: fourth spring, 37: movable frame. Detailed Implementation

[0029] Example: A foundation pit support device for building construction, see below. Figures 1-6As shown, it includes retaining plates 1 and telescopic screws 2; there are two retaining plates 1, and the two retaining plates 1 are distributed front and back; four telescopic screws 2 are provided between the two retaining plates 1, and the length of the telescopic screws 2 can be adjusted by twisting the screws on the telescopic screws 2 to rotate forward or backward as needed; it also includes positioning blocks 3, guide frames 5, sleeves 6, movable columns 7, first springs 8, sliding frames 10, insert plates 11, rollers 12 and flat belts 13; positioning blocks 3 are connected to both ends of the four telescopic screws 2, and there are eight positioning blocks 3; the positioning blocks 3 have round holes 4; four guide frames 5 are spaced apart on the upper part of the side of the two retaining plates 1 that are close to each other, and there are eight guide frames 5, which are used to guide and limit the positioning blocks 3; four sets of sleeves 6 are spaced apart on the retaining plates 1, and there are two sleeves 6 in each set, with the two sleeves 6 in the same set distributed left and right; movable columns 7 are slidably installed in the sleeves 6, and the movable columns 7 are far from the A conical surface is provided on one side of the support frame 31, and the movable column 7 is used to lock the positioning block 3 into the round hole 4, thereby fixing the telescopic screw 2 and the retaining plate 1. A first spring 8 is connected between the movable column 7 and the inner side of the sleeve 6. A trapezoidal hole 9 is opened on the movable column 7. A sliding frame 10 is symmetrically slidably arranged on the upper side of the retaining plate 1. Four insert plates 11 are connected to the sliding frame 10. The insert plates 11 are inserted into the trapezoidal hole 9 of the movable column 7. The insert plates 11 contact the inclined surface of the trapezoidal hole 9. When the insert plates 11 move down, they can squeeze the movable column 7, causing the movable column 7 to leave the round hole 4, thereby releasing the locking of the movable column 7 to the positioning block 3. Rollers 12 are provided at the top and bottom of the retaining plate 1. A flat belt 13 is provided between the two rollers 12 on the retaining plate 1. The flat belt 13 is used to contact the soil surface of the inner wall of the foundation pit. During the up and down movement of the foundation pit support device, the frictional resistance is reduced by rolling, thereby preventing the soil from loosening and falling off.

[0030] In use, first, rotate the screw on the telescopic screw 2 clockwise or counterclockwise to adjust the length of the telescopic screw 2 as needed. After the length of the telescopic screw 2 is adjusted, move the retaining plate 1 closer to the telescopic screw 2, aligning the positioning block 3 connected to the telescopic screw 2 with the guide frame 5. When the guide frame 5 contacts the positioning block 3, the guide frame 5 will guide the positioning block 3 between the two sleeves 6 in the same group, and the guide frame 5 will limit the positioning block 3. When the positioning block 3 contacts the conical surface of the movable column 7, the positioning block 3 will squeeze the movable column 7 back into the sleeve 6, compressing the first spring 8. When the movable column 7 aligns with the round hole 4 on the positioning block 3, the first spring 8 returns to its original state, and the first spring 8 drives the movable column 7 to extend out of the sleeve 6, so that the movable column 7 is inserted into the round hole 4 of the positioning block 3, thereby making the movable column... 7. Lock the positioning block 3 to fix the telescopic screw 2 and the retaining plate 1. When all the positioning blocks 3 on the telescopic screw 2 are in the corresponding guide frame 5 and locked by the corresponding movable column 7, the four telescopic screws 2 and the retaining plates 1 on both sides can be fixed, thus completing the assembly of the foundation pit support device. Then, the assembled foundation pit support device is hoisted into the foundation pit by a crane until the assembled foundation pit support device is placed in the foundation pit. During this process, when the soil at the edge of the foundation pit comes into contact with the flat belt 13, the foundation pit support device will drive the flat belt 13 to circulate on the soil at the edge of the foundation pit. This rolling on the soil can reduce the friction on the soil compared with the traditional sliding (turning the original sliding friction into rolling friction), thereby preventing the soil from loosening and reducing the falling of soil.

[0031] When not in use, the assembled pit support device is lifted out of the pit by a crane. During this process, the pit support device will drive the flat belt 13 to perform a reverse circulation motion on the soil at the edge of the pit until the soil at the edge of the pit separates from the flat belt 13. After the assembled pit support device is lifted out of the pit, the sliding frame 10 is pressed down to move it downwards, causing the sliding frame 10 to drive the insert plate 11 downwards. This causes the insert plate 11 to press the movable column 7 through the inclined surface of the trapezoidal hole 9 and retract it into the sleeve 6. The first spring 8 is compressed, thereby causing the movable column 7 to retract into the sleeve 6. The movable column 7 leaves the round hole 4 of the positioning block 3, thereby releasing the locking of the positioning block 3 to the movable column 7. Then, move the retaining plate 1 away from the telescopic screw 2, so that the positioning block 3 on the telescopic screw 2 leaves the guide frame 5 and separates the guide frame 5 from the positioning block 3. Finally, release the sliding frame 10, and the first spring 8 returns to its original state. The first spring 8 drives the movable column 7 to extend out of the sleeve 6, so that the movable column 7 moves upward and resets by pressing the insert plate 11 and the sliding frame 10 through the inclined surface of the trapezoidal hole 9. In this way, the disassembly of the foundation pit support device can be completed.

[0032] See Figure 5 and Figure 6As shown, it also includes a scraper 14; the lower part of the two retaining plates 1 on the side that are close to each other is connected to the scraper 14, the scraper 14 is in contact with the surface of the flat belt 13, and the scraper 14 is used to scrape off the soil on the surface of the flat belt 13.

[0033] By setting up a scraper 14, when the dirt adhering to the flat belt 13 comes into contact with the scraper 14, the scraper 14 will scrape off the dirt adhering to the surface of the flat belt 13, thereby cleaning the dirt on the surface of the flat belt 13.

[0034] See Figure 6 As shown, it also includes a sponge block 15; a sponge block 15 is provided in the middle of the scraper 14, the sponge block 15 is in contact with the surface of the flat belt 13, and the sponge block 15 is used to absorb the liquid on the surface of the flat belt 13.

[0035] By setting up the sponge block 15, when the liquid adhering to the flat belt 13 comes into contact with the sponge block 15, the sponge block 15 will absorb the liquid adhering to the surface of the flat belt 13, thereby cleaning the liquid on the surface of the flat belt 13.

[0036] See Figures 7-9 As shown, it also includes a fixing mechanism, which includes a connecting frame 16, a first electric push rod 17, a movable cylinder 18, a second spring 19, and a pointed cone 20; the connecting frame 16 is symmetrically arranged on the left and right sides of the middle of the retaining plate 1; the first electric push rod 17 is arranged on the connecting frame 16; the movable cylinder 18 is slidably arranged on the telescopic rod of the first electric push rod 17; the second spring 19 is connected between the inner side of the movable cylinder 18 and the telescopic rod of the first electric push rod 17; the pointed cone 20 is connected to the end of the movable cylinder 18, and the pointed cone 20 is used to insert into the soil.

[0037] See Figure 9 As shown, it also includes a limiting plate 21; the upper and lower sides of the first electric push rod 17 are connected to the limiting plate 21, and the upper and lower sides of the movable cylinder 18 are provided with sliding grooves 22, and the limiting plate 21 slides in the sliding grooves 22.

[0038] See Figure 9 and Figure 10As shown, it also includes a hooking mechanism, which includes a guide rod 23, a movable block 24, a third spring 25, and a connecting block 26. Four guide rods 23 are provided inside the movable cylinder 18. Two movable blocks 24 are slidably arranged between the four guide rods 23 inside the movable cylinder 18. The two movable blocks 24 are symmetrically distributed from left to right, and the movable cylinder 18 is provided with through holes for the movable blocks 24 to extend out of the movable cylinder 18. The side of the two movable blocks 24 that is far apart from each other is provided with a cone structure, which facilitates insertion into the soil. The side of the two movable blocks 24 that is close to each other is provided with an inclined surface. Four third springs 25 are connected between the two movable blocks 24 on the guide rod 23. A connecting block 26 is connected to the telescopic rod of the first electric push rod 17. The connecting block 26 is used to squeeze the movable blocks 24 on the guide rod 23.

[0039] By setting up a fixing mechanism, a limiting plate 21, and a hooking mechanism, after the foundation pit support device is placed in the foundation pit, the extension rod of the first electric push rod 17 can be controlled to extend. This causes the extension rod of the first electric push rod 17 to drive the connecting block 26, the second spring 19, the movable cylinder 18, the cone 20, the guide rod 23, and the movable block 24 to move towards the side closer to the soil inside the foundation pit. This allows the limiting plate 21 on the first electric push rod 17 to slide within the sliding groove 22. When the cone 20 contacts the inner wall of the foundation pit, it will insert into the soil, thereby limiting the movable cylinder 18, the first electric push rod 17, the connecting frame 16, and the retaining plate 1. This limits the foundation pit support device inside the foundation pit, preventing it from being compressed on both sides. When displacement occurs, and the limiting plate 21 moves to the end of the chute 22, it will block the movement of the movable cylinder 18, the cone 20, the guide rod 23, and the movable block 24, causing them to stop moving. Then, as the telescopic rod of the first electric push rod 17 continues to extend, the second spring 19 is compressed. Simultaneously, the telescopic rod of the first electric push rod 17 drives the connecting block 26 to continue moving closer to the interior of the foundation pit soil. When the connecting block 26 contacts the inclined surface on the movable block 24, it will compress the movable block 24, causing it to extend out of the movable cylinder 18 through the through hole. The third spring 25 will then extend, causing the conical structure of the movable block 24 to contact the soil, allowing the movable block 24 to insert into the soil using its conical structure. In this way, the movable block 24 and the movable cylinder 18 can form a "claw"-like structure that hooks into the soil. When the retaining plate 1 is pressured by the soil at the edge of the foundation pit, the "claw"-like structure formed by the movable block 24 and the movable cylinder 18 can provide a certain pulling force to the retaining plate 1, thereby reducing the pressure on the retaining plate 1 and improving the stability of the foundation pit support device. When it is necessary to lift the assembled foundation pit support device out of the foundation pit by a crane, the telescopic rod of the first electric push rod 17 is first controlled to shorten and reset, so that the telescopic rod of the first electric push rod 17 drives the connecting block 26 to move and reset to the side away from the soil inside the foundation pit. During this period, the second spring 19 gradually returns to its original state. When the connecting block 26 separates from the inclined surface on the movable block 24, the third spring 2 5. After restoring to its original state, the third spring 25 drives the movable block 24 to retract into the movable cylinder 18 through the through hole, causing the cone structure of the movable block 24 to leave the soil. When the second spring 19 returns to its original state, the telescopic rod of the first electric push rod 17 will drive the second spring 19, the movable cylinder 18, the cone 20, the guide rod 23, and the movable block 24 to move and reset to the side away from the soil inside the foundation pit, causing the cone 20 to leave the inner wall of the foundation pit, thereby releasing the restriction on the movable cylinder 18, the first electric push rod 17, the connecting frame 16, and the retaining plate 1, and thus releasing the restriction on the foundation pit support device in the foundation pit. At the same time, the limiting plate 21 on the first electric push rod 17 slides and resets in the sliding groove 22. After that, the assembled foundation pit support device can be lifted out of the foundation pit by the crane.

[0040] See Figure 7 , Figure 8 , Figure 11 and Figure 12 As shown, it also includes a support mechanism, which includes a fixed frame 27, a pressure sensor 28, a controller 29, a rotating plate 30, a support frame 31, a second electric push rod 32, a support block 33, a triangular block 34, a locking block 35, and a fourth spring 36; a fixed frame 27 is provided on the upper part of the side of the two retaining plates 1 that are close to each other; a pressure sensor 28 is provided on the side of the two fixed frames 27 that are far from each other; two controllers 29 are provided on the lower part of the side of the two retaining plates 1 that are close to each other, and the controllers 29 are electrically connected to the pressure sensors 28; three rotating plates 30 are rotatably arranged on the fixed frame 27 at intervals, and a support frame 31 is slidably arranged between the three rotating plates 30 on the same fixed frame 27; two second electric push rods 32 are rotatably arranged on the lower part of the side of the two retaining plates 1 that are close to each other, and the second electric push rods 32 are located at the control Below the device 29, and the second electric push rod 32 is electrically connected to the controller 29. The telescopic rod of the second electric push rod 32 is rotatably connected to the adjacent rotating plate 30. Two support blocks 33 are provided on the lower part of the side of the retaining plate 1 that is close to each other. The support blocks 33 are located below the second electric push rod 32 and are used to support the support frame 31. Triangular blocks 34 are symmetrically spaced on the inner side of the rotating plate 30. The triangular blocks 34 are isosceles right triangles. One right-angled side of the triangular block 34 is connected to the rotating plate 30, and the other right-angled side faces downward. Three sets of locking blocks 35 are provided on the upper side of the support frame 31. There are six locking blocks 35 in each set. The six locking blocks 35 in the same set are symmetrically distributed on the left and right. The side of the locking block 35 away from the inside of the support frame 31 is provided with an inclined surface. A fourth spring 36 is connected between the locking block 35 and the support frame 31.

[0041] See Figure 11 As shown, it also includes movable frames 37. Three movable frames 37 are slidably arranged on the upper side of the support frame 31. The movable frames 37 are used to squeeze the movement of the card block 35.

[0042] By setting up a support mechanism and movable frame 37, during the use of the foundation pit support device in the foundation pit, when the soil at the edge of the foundation pit applies pressure to the upper middle part of the retaining plate 1 via the flat belt 13, the upper middle part of the retaining plate 1 will apply pressure to the pressure sensor 28 via the flat belt 13. When the pressure sensor 28 senses that the pressure is greater than the preset value, the pressure sensor 28 will send a signal. After receiving the signal, the controller 29 will control the extension rod of the second electric push rod 32 to extend, so that the extension rod of the second electric push rod 32 drives the rotating plate 30 and the support frame 31 to rotate and unfold. When the support frame 31 separates from the support block 33, the support frame 31 will lose the support of the support block 33, and then the support frame 31 and the clips on it will... Block 35 and movable frame 37 will fall downwards due to gravity. When block 35 falls to contact the inclined surface of triangular block 34, triangular block 34 will squeeze block 35 back into the support frame 31, and the fourth spring 36 will compress. When block 35 falls past the inclined surface of triangular block 34, the fourth spring 36 will return to its original state, and the fourth spring 36 will drive block 35 to extend out of the support frame 31, so that the top surface of block 35 contacts the bottom of triangular block 34, until the support frame 31 falls to contact the ground, so that the support frame 31 is supported on the ground. Thus, the support frame 31 uses the top surface of block 35 and the bottom of triangular block 34 to support the rotating plate 30, thereby supporting the fixed frame 27 and the retaining plate 1, and then... The pressure on the retaining plate 1 is reduced to further improve its stability and prevent excessive deformation. After the operator observes that the support frame 31 is firmly planted on the ground, the soil around the retaining plate 1 can be reinforced to reduce its pressure. Once the soil around the retaining plate 1 is reinforced, the movable frame 37 is moved upwards until it contacts the inclined surface of the locking block 35. This causes the movable frame 37 to press the locking block 35 back into the support frame 31, compressing the fourth spring 36 and separating the top of the locking block 35 from the bottom of the triangular block 34. The support frame 31 is then pulled upwards to reset, and the second electric push rod 32 is then controlled. The telescopic rod is shortened and reset, causing the telescopic rod of the second electric push rod 32 to drive the rotating plate 30 and the support frame 31 to reverse and retract, so as to prevent the unfolded rotating plate 30 and support frame 31 from obstructing the passage and construction operations of workers in the foundation pit support device. When the support frame 31 contacts the support block 33, the support block 33 will support the support frame 31 again. Then the movable frame 37 is released, causing the movable frame 37 to fall down and reset under the influence of gravity. When the movable frame 37 separates from the locking block 35, the fourth spring 36 returns to its original state. The fourth spring 36 drives the locking block 35 to extend out from the inside of the support frame 31. In this way, support can be provided in time when the retaining plate 1 is under excessive pressure, thereby avoiding serious deformation of the retaining plate 1 due to excessive pressure.

Claims

1. A foundation pit support device for building construction, comprising retaining plates (1) and telescopic screws (2), wherein the telescopic screws (2) are provided between two retaining plates (1), characterized in that, Both ends of the telescopic screw (2) are connected to positioning blocks (3). The positioning blocks (3) have round holes (4). The retaining plate (1) is provided with guide frames (5) in the same number as the telescopic screw (2). The guide frames (5) are used to guide and limit the positioning blocks (3). The retaining plate (1) is provided with sleeves (6) at intervals. The sleeves (6) are slidably provided with movable columns (7). The movable columns (7) are used to lock the positioning blocks (3) into the round holes (4). A first spring (8) is connected between the movable column (7) and the inner side of the sleeve (6). A trapezoidal hole (9) is provided on the movable column (7), and a sliding frame (10) is slidably provided on the retaining plate (1). An insert plate (11) is connected to the sliding frame (10). The insert plate (11) is inserted into the trapezoidal hole (9) of the movable column (7). The movable column (7) is squeezed out of the round hole (4) by the insert plate (11), thereby releasing the locking of the movable column (7) to the positioning block (3). Two rollers (12) are provided on the retaining plate (1), and a flat belt (13) is provided between the two rollers (12). The flat belt (13) is used to contact the soil of the foundation pit. The contact also includes a support mechanism, which includes a fixed frame (27), a pressure sensor (28), a controller (29), a rotating plate (30), a support frame (31), a second electric push rod (32), a support block (33), a triangular block (34), a locking block (35), and a fourth spring (36). The retaining plate (1) is provided with a fixed frame (27) and a controller (29). The pressure sensor (28) is connected to the fixed frame (27). The rotating plate (30) is rotatably provided on the fixed frame (27). The rotating plate (30) is slidably provided with... The support frame (31) has a second electric push rod (32) rotatably mounted on the retaining plate (1). The telescopic rod of the second electric push rod (32) is rotatably connected to the rotating plate (30). The retaining plate (1) has a support block (33) for supporting the support frame (31). The rotating plate (30) has triangular blocks (34) spaced apart. The support frame (31) has a locking block (35) slidably mounted on the support frame (31). The triangular block (34) contacts the locking block (35). The locking block (35) is connected to the support frame (31) by a fourth spring (36).

2. A foundation pit support device for building construction according to claim 1, characterized in that, It also includes a scraper (14), which is installed on the retaining plate (1). The scraper (14) is used to scrape off the soil on the surface of the flat belt (13).

3. A foundation pit support device for building construction according to claim 2, characterized in that, It also includes a sponge block (15), which is provided on the scraper (14). The sponge block (15) is used to absorb the liquid on the surface of the flat belt (13).

4. A foundation pit support device for building construction according to claim 1, characterized in that, It also includes a fixing mechanism, which includes a connecting frame (16), a first electric push rod (17), a movable cylinder (18), a second spring (19), and a cone (20). The connecting frame (16) is installed on the retaining plate (1), and the first electric push rod (17) is provided on the connecting frame (16). The movable cylinder (18) is slidably provided on the telescopic rod of the first electric push rod (17). The second spring (19) is connected between the inner side of the movable cylinder (18) and the telescopic rod of the first electric push rod (17). The cone (20) is connected to the movable cylinder (18) and is used to insert into the soil.

5. A foundation pit support device for building construction according to claim 4, characterized in that, It also includes a limiting plate (21), the first electric push rod (17) is connected to the limiting plate (21), and the inner side of the movable cylinder (18) is provided with a sliding groove (22), and the limiting plate (21) slides in the sliding groove (22).

6. A foundation pit support device for building construction according to claim 4, characterized in that, It also includes a hooking mechanism, which includes a guide rod (23), a movable block (24), a third spring (25) and a connecting block (26). The guide rod (23) is provided inside the movable cylinder (18). The movable block (24) is symmetrically slidably arranged on the guide rod (23). The third spring (25) is connected between the movable blocks (24) on both sides of the guide rod (23). The connecting block (26) is connected to the telescopic rod of the first electric push rod (17). The connecting block (26) is used to squeeze the movable block (24) on the guide rod (23).

7. A foundation pit support device for building construction according to claim 1, characterized in that, It also includes a movable frame (37), which is slidably mounted on the support frame (31). The movable frame (37) is used to press the card block (35) to move.

Images