Foundation pit supporting device for building construction

Abstract

The invention relates to the technical field of building construction, in particular to a foundation pit supporting device for building construction. Comprising soil retaining plates and telescopic screw rods, the telescopic screw rods are arranged between the two soil retaining plates, positioning blocks are connected to the two ends of each telescopic screw rod, round holes are formed in the positioning blocks, and guide frames with the same number as the telescopic screw rods are arranged on the soil retaining plates. By arranging the telescopic screw rod, the positioning block, the guide frame, the sleeve, the movable column, the sliding frame and other structures, rapid assembly and disassembly of the foundation pit supporting device are achieved, the assembly and disassembly processes are greatly simplified, the construction efficiency is remarkably improved, the labor intensity of workers is effectively reduced, and in the process that the device is placed into or taken out of a foundation pit, the construction efficiency is greatly improved. According to the design of the rolling shafts and the flat belts, traditional sliding friction is converted into rolling friction, the friction force between the outer side of the device and the soil body is greatly reduced, therefore, the situation that the surrounding soil body is loosened, falls off and even collapses due to too large friction is prevented, and the safety of foundation pit construction is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a foundation pit supporting device for building construction. Background Art

[0002] During construction, foundation pit support systems are crucial equipment for ensuring underground construction safety. Their primary function is to support the sidewalls of the foundation pit, prevent soil collapse, ensure the safety of construction workers and equipment, and provide a stable working environment for subsequent underground structure construction. Traditional foundation pit support systems typically consist of two retaining plates and several horizontal braces. In actual use, workers bolt the horizontal braces between the two retaining plates to form an integrated support structure.

[0003] However, this traditional support device has obvious defects: 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 process of the bolts is 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, due to the large friction between the outside of the device and the soil, it is easy to cause a large amount of surrounding soil to loosen, thereby causing a large amount of local soil to fall off, and in severe cases, it is even easy to 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 construction, which can solve the problem that the assembly and disassembly operations of traditional support devices are cumbersome, which not only increases the labor intensity of workers, but also reduces construction efficiency. In addition, the traditional support device has a large friction between its outer side and the soil, which makes it easy to cause a large amount of soil to fall off.

[0005] The cam is provided with a plurality of guide rails at two ends, and a guide rail is provided at the two ends of the guide rail, and a guide rail is provided at the two ends of the guide rail for guiding and limiting the positioning block.

[0006] Furthermore, a scraper is also included. The scraper is installed on the retaining plate and is used to scrape off the soil on the surface of the flat belt.

[0007] Furthermore, a sponge block is also included. The scraper is provided with a sponge block, and the sponge block is used to absorb the 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 provided on the connecting frame. The movable cylinder is slidably provided 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 movable cylinder is connected to the pointed cone, and the pointed cone is used to be inserted into the soil.

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

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

[0011] Furthermore, it also includes a supporting mechanism, which includes a fixed frame, a pressure sensor, a controller, a rotating plate, a supporting frame, a second electric push rod, a supporting block, a triangular block, a clamping block and a fourth spring. A fixed frame and a controller are provided on the retaining plate, the fixed frame is connected to the pressure sensor, a rotating plate is rotatably provided on the fixed frame, a supporting frame is slidably provided on the rotating plate, a second electric push rod is rotatably provided on the retaining plate, the telescopic rod of the second electric push rod is rotatably connected to the rotating plate, a supporting block is provided on the retaining plate, the supporting block is used to support the supporting frame, triangular blocks are arranged at intervals in the rotating plate, a clamping block is slidably provided on the supporting frame, the triangular block is in contact with the clamping block, and a fourth spring is connected between the clamping block and the supporting frame.

[0012] Furthermore, a movable frame is also included. The movable frame is slidably arranged on the support frame, and the movable frame is used to squeeze the card block to move.

[0013] The present invention has the following advantages: 1. The present invention realizes the rapid assembly and disassembly of the foundation pit support device by arranging structures such as telescopic screws, positioning blocks, guide frames, sleeves, movable columns and sliding frames, greatly simplifies the installation and dismantling processes, significantly improves construction efficiency, and effectively reduces the labor intensity of workers. Moreover, in the process of placing the device in or out of the foundation pit, the design of rollers and flat belts converts traditional sliding friction into rolling friction, greatly reducing the friction between the outside of the device and the soil, thereby preventing the surrounding soil from loosening, falling off or even collapsing due to excessive friction, thereby improving the safety of foundation pit construction.

[0014] 2. The present invention can automatically remove the dirt and liquid attached to the surface of the flat belt through the arrangement of the scraper and sponge block, ensuring that the flat belt always remains clean during the circulation process, avoiding the accumulation of dirt that affects the operation of the equipment, and also helping to extend the service life of the equipment.

[0015] 3. The support mechanism of the present invention combines a pressure sensor, a controller and an electric push rod to realize real-time monitoring and response to the stress condition of the retaining plate. When it is detected that the pressure on the retaining plate exceeds the set threshold, the system automatically deploys the support frame and locks it, thereby timely sharing the pressure on the retaining plate, preventing it from serious deformation, and ensuring construction safety. After completing the temporary support task, the block lock 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 reset to the retracted state, which is convenient for subsequent construction personnel to pass and work, and also facilitates the maintenance and reuse of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure 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 the guide frame of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the movable column, the first spring and the inserting plate of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the earth retaining plate, flat belt and scraper of the present invention.

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

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

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

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

[0025] Figure 10 It is a schematic diagram of the three-dimensional structure of the hooking mechanism of the present invention.

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

[0027] Figure 12 It is a schematic diagram of the three-dimensional structure of the clamping block and the fourth spring of the present invention.

[0028] The meanings of the reference numerals in the figure 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: inserting 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: supporting frame, 32: second electric push rod, 33: supporting block, 34: triangular block, 35: clamping block, 36: fourth spring, 37: movable frame. DETAILED DESCRIPTION

[0029] Example: A foundation pit support device for construction, see Figures 1-6The utility model shows that it comprises a retaining plate 1 and a telescopic screw 2; the number of retaining plates 1 is two, 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 screw 2 can be adjusted according to demand by twisting the screw on the telescopic screw 2 for forward or reverse rotation; it also comprises a positioning block 3, a guide frame 5, a sleeve 6, a movable column 7, a first spring 8, a sliding frame 10, a plug plate 11, a roller 12 and a flat belt 13; both ends of the four telescopic screws 2 are connected with a positioning block 3, and the number of the positioning blocks 3 is eight; a circular hole 4 is opened on the positioning block 3; four guide frames 5 are arranged at intervals on the upper part of the side where the two retaining plates 1 are close to each other, and the number of the guide frames 5 is eight, and the guide frames 5 are used to guide and limit the positioning blocks 3; four groups of sleeves 6 are arranged at intervals on the retaining plate 1, and the number of a group of sleeves 6 is two, and the two sleeves 6 of the same group are distributed left and right; a movable column 7 is slidingly provided in the sleeve 6, and the movable column 7 is far When the lever 1 is moved downwards, the movable column 7 is pressed against the bottom surface of the workpiece 3 and the movable column 7 is moved out of the circular hole 4 so as to release the locking cam 3 from the movable column 7. The movable column 7 is provided with a first spring 8 between the movable column 7 and the inner side of the sleeve 6. A trapezoidal hole 9 is provided on the movable column 7. A sliding frame 10 is provided on the upper side of the retaining plate 1 for sliding symmetrically. Four plug-ins 11 are connected to the sliding frame 10. The plug-ins 11 are inserted into the trapezoidal holes 9 of the movable column 7. The plug-ins 11 contact the inclined surfaces of the trapezoidal holes 9. When the plug-ins 11 move downwards, they can squeeze the movable column 7 so that the movable column 7 leaves the circular hole 4, thereby releasing the locking cam 3 of the movable column 7 on 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. The friction resistance is reduced by rolling during the up and down movement of the foundation pit support device, thereby preventing the soil from loosening and falling off.

[0030] When in use, first twist the screw on the telescopic screw 2 to rotate forward or reverse, so as to adjust the length of the telescopic screw 2 according to demand. After the length of the telescopic screw 2 is adjusted, move the retaining plate 1 to the side close to the telescopic screw 2, and align 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 of 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, and the first spring 8 is compressed. When the movable column 7 is aligned with the circular 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 from the sleeve 6, so that the movable column 7 is stuck in the circular hole 4 of the positioning block 3, thereby making the movable column 7 locks the positioning blocks 3 to fix the telescopic screw 2 and the retaining plate 1. In this way, when the positioning blocks 3 on the telescopic screw 2 all enter the corresponding guide frames 5 and the corresponding movable columns 7 lock the positioning blocks 3, the four telescopic screws 2 can be completely fixed to the retaining plates 1 on both sides, thereby completing the assembly of the foundation pit supporting device. Subsequently, the assembled foundation pit supporting device is hoisted into the foundation pit by a crane until the assembled foundation pit supporting device is completely placed in the foundation pit. During this period, when the soil at the edge of the foundation pit contacts the flat belt 13, the foundation pit supporting device will drive the flat belt 13 to circulate on the soil at the edge of the foundation pit. By rolling on the soil, the friction on the soil can be reduced compared with traditional sliding (the original sliding friction is converted into rolling friction), thereby preventing the soil from loosening and reducing the falling of soil. When it is no longer needed, the assembled foundation pit support device is lifted out of the foundation pit by a crane. During this period, the foundation pit support device will drive the flat belt 13 to perform reverse circulation on the soil at the edge of the foundation pit until the soil at the edge of the foundation pit is separated from the flat belt 13. After the assembled foundation pit support device is lifted out of the foundation pit, the sliding frame 10 is pressed to move downward, so that the sliding frame 10 drives the inserting plate 11 to move downward, so that the inserting plate 11 squeezes the movable column 7 through the inclined surface of the trapezoidal hole 9 and retracts it into the sleeve 6. The first spring 8 is compressed, thereby causing the movable column 7 to Leave the circular hole 4 of the positioning block 3 to release the lock of the positioning block 3 by the movable column 7, then move the retaining plate 1 to the side away from the telescopic screw 2, so that the positioning block 3 on the telescopic screw 2 leaves the guide frame 5, and the guide frame 5 is separated from the positioning block 3, and 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 from the sleeve 6, so that the movable column 7 passes through the inclined surface of the trapezoidal hole 9 to squeeze the insert plate 11 and the sliding frame 10 and move upward to reset. In this way, the disassembly of the foundation pit support device can be completed.

[0031] See Figure 5 and Figure 6As shown, a scraper 14 is also included; the lower portion of the two retaining plates 1 close to each other is connected to a 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.

[0032] By providing the scraper 14 , when the dirt adhered to the flat belt 13 contacts the scraper 14 , the scraper 14 will scrape off the dirt adhered to the surface of the flat belt 13 , thereby cleaning the dirt on the surface of the flat belt 13 .

[0033] See Figure 6 As shown, a sponge block 15 is also included; 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.

[0034] By providing the sponge block 15 , when the liquid adhered to the flat belt 13 contacts the sponge block 15 , the sponge block 15 will absorb the liquid adhered to the surface of the flat belt 13 , thereby cleaning the liquid on the surface of the flat belt 13 .

[0035] See Figure 7-Figure 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; a connecting frame 16 is symmetrically provided on the left and right sides of the middle part of the earth retaining plate 1; a first electric push rod 17 is provided on the connecting frame 16; a movable cylinder 18 is slidably provided on the telescopic rod of the first electric push rod 17; a 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; a pointed cone 20 is connected to the end of the movable cylinder 18, and the pointed cone 20 is used to be inserted into the soil.

[0036] See Figure 9 As shown, it also includes a limit plate 21; the upper and lower sides of the first electric push rod 17 are connected to the limit plate 21, and the upper and lower sides of the interior of the movable cylinder 18 are provided with a slide groove 22, and the limit plate 21 slides in the slide groove 22.

[0037] 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 on the inner side of the movable cylinder 18, and two movable blocks 24 are slidably provided between the four guide rods 23 in the movable cylinder 18, and the two movable blocks 24 are symmetrically distributed on the left and right, and a through hole for the movable block 24 to extend is opened on the movable cylinder 18, so that the movable block 24 can extend out of the movable cylinder 18 through the through hole, and the side where the two movable blocks 24 are away from each other is set as a cone structure, which is convenient for inserting into the soil, and the side where the two movable blocks 24 are 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, and the connecting block 26 is used to squeeze the movable block 24 on the guide rod 23.

[0038] By setting a fixing mechanism, a limiting plate 21 and a hooking mechanism, after the foundation pit supporting device is placed in the foundation pit, the telescopic rod of the first electric push rod 17 can be controlled to extend, so that the telescopic rod of the first electric push rod 17 drives the connecting block 26, the second spring 19, the movable cylinder 18, the sharp cone 20, the guide rod 23 and the movable block 24 to move to the side close to the interior of the foundation pit soil, so that the limiting plate 21 on the first electric push rod 17 slides in the slide groove 22. When the sharp cone 20 contacts the inner wall of the foundation pit, the sharp cone 20 will be inserted into the soil, thereby limiting the movable cylinder 18, the first electric push rod 17, the connecting frame 16 and the retaining plate 1, thereby limiting the foundation pit supporting device in the foundation pit, and preventing the left and right sides of the foundation pit supporting device from being compressed. When displacement occurs, when the limit plate 21 moves to the end of the slide groove 22, the limit plate 21 will prevent the movable cylinder 18, the pointed cone 20, the guide rod 23 and the movable block 24 from continuing to move, so that the movable cylinder 18, the pointed cone 20, the guide rod 23 and the movable block 24 stop moving. Then, as the telescopic rod of the first electric push rod 17 continues to extend, the second spring 19 is compressed, and at the same time, the telescopic rod of the first electric push rod 17 drives the connecting block 26 to continue to move to the side close to the inside of the foundation pit soil. When the connecting block 26 contacts the inclined surface on the movable block 24, the connecting block 26 squeezes the movable block 24 through the through hole and extends out of the movable cylinder 18. The third spring 25 is stretched, so that the cone structure of the movable block 24 contacts the soil, so that the movable block 24 uses the vertebral structure to insert into the soil. In this way, the movable block 24 and the movable cylinder 18 can form a structure similar to a "claw" to hook in the soil. When the retaining plate 1 is pressed by the soil at the edge of the foundation pit, the movable block 24 and the movable cylinder 18 form a similar "claw" structure to 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 the crane, first control the telescopic rod of the first electric push rod 17 to shorten and reset, so that the telescopic rod of the first electric push rod 17 drives the connecting block 26 to move to the side away from the inside of the foundation pit soil and reset. 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 returns to its original state, the third spring 25 drives the movable block 24 to retract into the movable cylinder 18 through the through hole, so that the cone structure of the movable block 24 leaves the soil. When the second spring 19 returns to its original state, the telescopic rod of the first electric push rod 17 drives the second spring 19, the movable cylinder 18, the pointed cone 20, the guide rod 23 and the movable block 24 to move and reset to the side away from the interior of the foundation pit soil, so that the pointed cone 20 leaves 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 further releasing the restriction on the foundation pit supporting 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 slide groove 22. After that, the assembled foundation pit supporting device can be lifted out of the foundation pit by a crane.

[0039] See Figure 7 、 Figure 8 、 Figure 11 and Figure 12 As shown, it also includes a supporting mechanism, which includes a fixing frame 27, a pressure sensor 28, a controller 29, a rotating plate 30, a supporting frame 31, a second electric push rod 32, a supporting block 33, a triangular block 34, a clamping block 35 and a fourth spring 36; a fixing frame 27 is provided on the upper part of the side where the two retaining plates 1 are close to each other; a pressure sensor 28 is provided on the side where the two retaining plates 27 are away from each other; two controllers 29 are provided on the lower part of the side where the two retaining plates 1 are close to each other, and the controller 29 is electrically connected to the pressure sensor 28; three rotating plates 30 are provided on the fixing frame 27 for rotation at intervals, and a supporting frame 31 is provided for sliding between the three rotating plates 30 on the same fixing frame 27; two second electric push rods 32 are provided on the lower part of the side where the two retaining plates 1 are close to each other, and the second electric push rods 32 are located at the control The cam 35 is connected to the control panel 29 by the second electric push rod 32, and 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 close to each other of the retaining plate 1, and the support block 33 is located below the second electric push rod 32, and the support block 33 is used to support the support frame 31; triangular blocks 34 are symmetrically arranged at intervals on the inside of the rotating plate 30, and the triangular blocks 34 are isosceles right triangles. One of the right-angled sides of the triangular blocks 34 is connected to the rotating plate 30, and the other right-angled side faces downward; three groups of card blocks 35 are provided on the upper side of the support frame 31, and the number of a group of card blocks 35 is six. The six card blocks 35 in the same group are symmetrically distributed on the left and right. The card block 35 is provided with an inclined surface on the side away from the inside of the support frame 31, and a fourth spring 36 is connected between the card block 35 and the support frame 31.

[0040] See Figure 11 As shown, a movable frame 37 is also included. Three movable frames 37 are slidably provided on the upper side of the support frame 31. The movable frames 37 are used to squeeze the clamping block 35 to move.

[0041] By setting the supporting mechanism and the movable frame 37, during the use of the foundation pit supporting device in the foundation pit, when the soil at the edge of the foundation pit applies pressure to the middle and upper part of the retaining plate 1 through the flat belt 13, the middle and upper part of the retaining plate 1 will apply pressure to the pressure sensor 28 through 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 telescopic rod of the second electric push rod 32 to extend, so that the telescopic 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 is separated 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 card thereon will be pressed. The block 35 and the movable frame 37 will fall downward under the influence of gravity. When the block 35 falls and contacts the inclined surface of the triangular block 34, the triangular block 34 will squeeze the block 35 and retract it into the support frame 31. The fourth spring 36 is compressed. When the block 35 falls and passes over the inclined surface of the triangular block 34, the fourth spring 36 returns to its original state. The fourth spring 36 drives the block 35 to extend from the inside of the support frame 31, so that the top surface of the block 35 contacts the bottom of the triangular block 34 until the support frame 31 falls and contacts the ground, so that the support frame 31 is supported on the ground, so that the support frame 31 uses the top surface of the block 35 and the bottom of the triangular block 34 to support the rotating plate 30, thereby supporting the fixing frame 27 and the retaining plate 1, and then dividing The pressure on the retaining plate 1 is spread out, thereby further improving the stability of the retaining plate 1 and preventing the retaining plate 1 from being seriously deformed due to excessive pressure. After that, when the operator observes that the support frame 31 is supported on the ground, the soil around the retaining plate 1 can be reinforced to reduce the pressure of the surrounding soil on the retaining plate 1. After the soil around the retaining plate 1 is reinforced, the movable frame 37 is moved upward by hand, so that the movable frame 37 contacts the inclined surface of the block 35, so that the movable frame 37 squeezes the block 35 and retracts it into the support frame 31. The fourth spring 36 is compressed, thereby separating the top of the block 35 from the bottom of the triangular block 34. Then the support frame 31 is pulled upward to reset, and then the second electric push rod 32 is controlled. 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, and the movable frame 37 falls down and resets under the influence of gravity. When the movable frame 37 is separated from the block 35, the fourth spring 36 returns to its original state, and the fourth spring 36 drives the block 35 to extend from the inside of the support frame 31. In this way, support can be provided in time when the retaining plate 1 is under too much pressure, thereby avoiding serious deformation of the retaining plate 1 due to excessive pressure.

Claims

1. A foundation pit support device for construction, comprising a retaining plate (1) and a telescopic screw (2), wherein the telescopic screw (2) is provided between the two retaining plates (1), and wherein: Both ends of the telescopic screw (2) are connected to positioning blocks (3), and a circular hole (4) is opened on the positioning block (3). The retaining plate (1) is provided with guide frames (5) of the same number as the telescopic screw (2). The guide frames (5) are used to guide and limit the positioning blocks (3). Sleeves (6) are provided at intervals on the retaining plate (1). A movable column (7) is provided in the sleeve (6) for sliding. The movable column (7) is used to be inserted into the circular hole (4) to lock the positioning block (3). 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), a sliding frame (10) is slidably provided on the retaining plate (1), a plug plate (11) is connected to the sliding frame (10), the plug plate (11) is inserted into the trapezoidal hole (9) of the movable column (7), and the movable column (7) is squeezed out of the circular hole (4) by the plug plate (11), thereby releasing the locking of the movable column (7) on the positioning block (3), and two rollers (12) are provided on the retaining plate (1), and a flat belt (13) is provided between the two rollers (12), and the flat belt (13) is used to contact the soil of the foundation pit.

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

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

4. A foundation pit support device for construction according to claim 1, characterized in that: The invention 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 earth retaining plate (1) is installed with a connecting frame (16), the connecting frame (16) is provided with a first electric push rod (17), 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 movable cylinder (18) is connected with a pointed cone (20), and the pointed cone (20) is used to be inserted into the soil.

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

6. A foundation pit support device for construction according to claim 4, characterized in that: The invention 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), and the movable block (24) is symmetrically slidably provided 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), and the connecting block (26) is used to squeeze the movable block (24) on the guide rod (23).

7. A foundation pit support device for construction according to claim 1, characterized in that: The invention 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 clamping block (35) and a fourth spring (36). The retaining plate (1) is provided with a fixed frame (27) and a controller (29), the fixed frame (27) is connected to the pressure sensor (28), the fixed frame (27) is rotatably provided with a rotating plate (30), and the rotating plate (30) is slidably provided with a support frame (31). A support frame (31) is provided with a second electric push rod (32) for rotation on the retaining plate (1), a telescopic rod of the second electric push rod (32) is rotatably connected to the rotating plate (30), a support block (33) is provided on the retaining plate (1), the support block (33) is used to support the support frame (31), a triangular block (34) is provided at intervals in the rotating plate (30), a clamping block (35) is slidably provided on the support frame (31), the triangular block (34) is in contact with the clamping block (35), and a fourth spring (36) is connected between the clamping block (35) and the support frame (31).

8. A foundation pit supporting device for construction according to claim 7, characterized in that: It also includes a movable frame (37), which is slidably provided on the support frame (31), and the movable frame (37) is used to squeeze the card block (35) to move.

Images