Foundation pit supporting device for building construction

Abstract

The invention discloses a foundation pit supporting device for building construction, and belongs to the technical field of building construction supporting equipment. The device mainly comprises a pressing plate, a ground nail is fixedly connected to the bottom of the pressing plate, an expansion assembly is slidably arranged on the inner wall of the ground nail, a first sliding groove is fixedly formed in the top of the pressing plate, a sliding extrusion block is slidably connected to the first sliding groove, a threaded rod is rotatably connected to the side wall of the pressing plate, and a rotating base is fixedly connected to the top of the sliding extrusion block; a cylinder groove is fixedly formed in the mounting cylinder and slidably connected with a supporting rod, the top of the supporting rod is rotationally connected with a baffle, and the other end of the baffle is rotationally connected with the pressing plate. By arranging the pressing plate, the ground nails are inserted into the stratum, and then the expansion nails are transversely inserted into the soil layer, so that the stability of the supporting device is improved, and the situation that the head of the supporting device is warped and lifted when the baffle is subjected to large extrusion force is avoided. The supporting device is mainly used for supporting the foundation pit.

Description

Technical Field

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

[0002] With the acceleration of urbanization, foundation pit support devices in construction have gradually become an indispensable and important part of the civil engineering field. The main purpose of the foundation pit support device is to effectively support and protect the side walls of the foundation pit and the surrounding environment during the foundation pit excavation process to prevent the occurrence of safety accidents such as foundation pit collapse and collapse, ensure the safety of construction personnel, and ensure the smooth progress of the project construction.

[0003] A Chinese patent with publication number "CN217629973U" discloses a foundation pit support device for construction, including a support plate and a connecting assembly. A plurality of mounting rails are provided on one side of the support plate, support bars are interspersed between the mounting rails, and a fixing bar is installed on one side of the support bar through the connecting assembly. The user fits the support plate to the slope, inserts the support bar into the mounting rail, and the fixing bar is fixedly connected to the ground through ground nails. The support plate is supported by the fixing bar, the support bar, the support rod and the support screw.

[0004] During the later use, the device still has the following problems: 1. As the pressure on the support plate from the side wall of the foundation pit gradually increases, the ground nails cannot completely ensure that the fixing strip is in contact with the ground, causing the front end of the fixing strip to curl up, affecting the support effect; 2. When installing the support device, workers are required to rotate the screw sleeve forcefully so that the support plate can apply pre-pressure to the side wall of the foundation pit to support the side wall of the foundation pit. However, manually rotating the screw sleeve is not only time-consuming and labor-intensive, but also cannot ensure that the support plate can apply sufficient pre-pressure to the side wall of the foundation pit, and the preset support effect cannot be achieved. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a foundation pit support device for construction, which increases the stability of the support device by setting a pressure plate, inserting the ground nails into the ground layer and then inserting the expansion nails horizontally into the soil layer, so as to avoid the support device from tilting and being lifted up when the baffle is subjected to a large extrusion pressure.

[0006] The foundation pit supporting device for construction comprises a pressing plate, a ground nail is fixedly connected to the bottom of the pressing plate, a sliding groove three is fixedly provided at the bottom of the inner wall of the ground nail, an extension component is slidably provided on the inner wall of the ground nail, a sliding groove one is fixedly provided on the top of the pressing plate, a sliding extrusion block is slidably connected to the sliding groove one, a sliding groove two is fixedly provided at the bottom of the sliding groove one, a plurality of groups of limiting plates are slidably connected to the sliding groove two, a compression spring two is fixedly connected to the rear of the limiting plate, a plurality of groups of mounting grooves are fixedly provided on the side wall of the sliding groove two, the inner wall of the mounting groove is fixedly connected to the other end of the compression spring two, and a screw is rotatably connected to the side wall of the pressing plate. One end of the screw is fixedly connected with a rotating cap, and a pressure plate is extended outwardly from the rotating cap. The top of the sliding extrusion block is fixedly connected with a rotating seat, and the rotating seat is rotatably connected to a mounting cylinder. A cylinder groove is fixedly provided inside the mounting cylinder, and a support rod is slidably connected to the cylinder groove. Multiple groups of driving slots are fixedly provided on the side wall of the support rod. A baffle is rotatably connected to the top of the support rod, and the other end of the baffle is rotatably connected to the pressure plate. An extrusion rod is slidably connected inside the mounting cylinder, and a driving rotating rod is rotatably connected to the extrusion rod. A backstop assembly is fixedly connected to the top of the mounting cylinder, and the backstop assembly, the extrusion rod and the driving rotating rod all cooperate with the support rod.

[0007] Preferably, the sliding extrusion block is fixedly provided with a screw hole, the screw hole is meshed with the screw rod, driving extrusion columns are fixedly connected to both sides of the sliding extrusion block, a limiting slide groove is fixedly provided on the upper part of the sliding extrusion block, and multiple groups of limiting holes are fixedly provided on the inner wall of the limiting slide groove, a support plate assembly is slidably connected in the limiting slide groove, support plates are fixedly connected on both sides of the support plate assembly, the support plate cooperates with the limiting plate, a sliding hole is fixedly provided in the middle of the support plate assembly, two groups of limiting columns are slidably connected in the sliding area, a compression spring is fixedly connected between the two groups of limiting columns, and the limiting columns cooperate with the limiting holes.

[0008] Preferably, a driving pressure groove is fixedly opened on the inner wall at the top of the expansion component, and the driving pressure groove cooperates with the driving extrusion column. A plurality of sets of latch teeth are fixedly connected to the outer wall at the top of the expansion component, and the latch teeth cooperate with the limit plate. The two sides of the bottom of the expansion component are rotatably connected with connecting blocks, and the other end of the connecting block is rotatably connected with an expansion nail, and the expansion nail is slidably connected with the slide groove.

[0009] Preferably, the bottom of the extrusion rod is fixedly connected to a pushing base plate, the upper parts of both sides of the pushing base plate are fixedly connected to upper compression springs, the lower parts of both sides of the pushing base plate are fixedly connected to lower compression springs, the upper part of the pushing base plate is fixedly provided with a limited rotation groove, the bottom of the limited rotation groove is fixedly provided with a slot one, the top of the pushing base plate is fixedly connected to a push-pull rod one, the top of the push-pull rod one is fixedly connected to a push-pull rod two, the top of the push-pull rod two is fixedly connected to a fixed sliding frame, the fixed sliding frame is slidably connected to a friction block, the side wall of the friction block is fixedly connected to a compression spring three, the other end of the compression spring three is fixedly connected to the inner side wall of the fixed sliding frame, and the friction block cooperates with the side wall of the support rod.

[0010] Preferably, a swivel is fixedly provided at the bottom of the driving rotating rod, the swivel cooperates with the limiting rotating groove, a second slot is fixedly provided on the swivel, an extrusion rotating rod is fixedly connected to the bottom of the second slot, a push-pull rod three is fixedly connected to the top of the swivel, a top tooth wedge block is fixedly connected to the top of the push-pull rod three, and the top tooth wedge block cooperates with the driving slot.

[0011] Preferably, the bottom of the mounting cylinder is fixedly provided with a placement slot, the bottom of the placement slot is fixedly connected to a limited rotating piece, the limited rotating piece cooperates with the extrusion rotating rod, both sides of the placement slot are fixedly provided with installation slide grooves, the installation slide grooves are slidably connected to the pushing bottom plate, the top inner wall of the installation slide groove is fixedly connected to the top of the upper compression spring, the bottom inner wall of the installation slide groove is fixedly connected to the bottom end of the lower compression spring, the left and right parts of the mounting cylinder are fixedly provided with extrusion vertical slots, the extrusion vertical slots are slidably connected to the fixed slide frame, the bottom of the extrusion vertical slots is fixedly connected with an extrusion top block, the extrusion top block cooperates with the friction block, the bottom of the extrusion top block is fixedly provided with a vertical slot, the vertical slot is slidably connected to the second push-pull rod, the bottom of the cylinder slot is fixedly provided with a through slot, the through slot is slidably connected to the first push-pull rod.

[0012] Preferably, the upper and lower parts of the mounting cylinder are fixedly provided with rotation grooves, which cooperate with the push-pull rods. A right baffle plate and a left baffle plate are fixedly connected to the rotation groove. A connecting port is fixedly provided on the top of the right baffle plate, which connects the rotation groove with the cylinder groove. A limited rotation plate is fixedly connected to the top of the left baffle plate, which cooperates with the top tooth wedge block.

[0013] Preferably, the anti-recoil assembly includes an anti-recoil ring, a top cover is fixedly connected to the top of the anti-recoil ring, an opening is fixedly opened on the top cover, a rubber wedge is provided on the anti-recoil ring, the rubber wedge cooperates with the support rod, a handle is connected to the top of the rubber wedge, a compression spring four is fixedly provided on the outside of the handle, a fixing ring is fixedly connected to the upper part of the handle, the fixing ring cooperates with the opening, and the compression spring four cooperates with the inner wall of the top cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a pressure plate, insert the ground nails into the ground layer and then insert the expansion nails horizontally into the soil layer, the stability of the support device is increased to prevent the support device from tilting and being lifted up when the baffle is subjected to a large extrusion force; 2. By setting the installation tube and the support rod, the baffle can be squeezed and supported by adjusting the extended length of the support rod. By using tools such as hydraulic jacks to repeatedly push the extrusion rod upward, the support rod can be driven to extend continuously. By using tools such as hydraulic jacks to push the extrusion rod, the support rod can be slowly retracted into the installation tube under the combined effect of gravity and the baffle pressure, thereby improving the convenience of using the support device; 3. By setting up a backstop assembly and utilizing the structural features between the backstop ring and the rubber wedge block, when the support rod drives the multiple groups of rubber wedge blocks 902 to move downward, the rubber wedge blocks squeeze the backstop ring, and at the same time the backstop ring squeezes the rubber wedge blocks toward the support rod again, so that the further the support rod moves downward, the greater the friction force it is subjected to from the rubber wedge blocks, so that the support rod can only extend relative to the mounting tube, providing long-term supporting force for the baffle, and when the handle is pulled upward, the rubber wedge blocks are away from the backstop ring, and the support rod can be retracted into the mounting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention in a folded state; Figure 2 It is a schematic diagram of the structure of the present invention in the support state after being deployed; Figure 3 Schematic diagram of the internal structure of the pressing plate; Figure 4 It is a structural schematic diagram of the pressing plate; Figure 5 It is a schematic diagram of the structure of the extended component; Figure 6 It is a structural schematic diagram of the sliding extrusion block; Figure 7 It is a structural schematic diagram of the sliding extrusion block and the support plate; Figure 8 It is a schematic diagram of the internal structure of the sliding extrusion block and the support plate; Fig. 9 It is a schematic diagram of the structure of the expansion component and the sliding extrusion block; Fig.10 It is a schematic diagram of the structure of the installation tube and the support rod; Fig.11 It is a schematic diagram of the internal structure of the installation cylinder; Fig.12 It is a schematic diagram of the structure of the extrusion rod and the driving rotating rod; Fig.13 It is a structural schematic diagram of the extrusion slider at the top of the extrusion rod; Fig.14 It is a schematic diagram of the installation structure of the extrusion rod and the driving rotating rod; Fig.15 It is a schematic diagram of the bottom structure of the extrusion rod and the driving rotating rod; Fig.16 is a schematic diagram of the structure of the support rod; Fig.17 A schematic diagram of the structure of the backstop assembly; Fig.18 It is a schematic diagram of the external structure of the installation tube; Fig.19 It is a schematic diagram of the lower part of the installation tube; Fig. 20It is a schematic diagram of the installation structure of the extrusion rod inside the installation cylinder; Fig.21 for Fig. 20 A magnified view of the structure at center A; Fig. 22 A schematic diagram of the installation structure of the driving rod inside the installation cylinder; Fig.23 for Fig. 22 A magnified view of the structure at B in the middle; Fig.24 This is a schematic diagram of the structure for installing the transfer tank in the drum.

[0016] In the figure, 1, pressing plate; 101, ground nail; 102, slide slot 1; 103, slide slot 2; 104, slide slot 3; 105, mounting slot; 2, extension component; 201, driving pressing slot; 202, latching teeth; 203, connecting block; 204, extension nail; 3, screw rod; 301, rotating cap; 4, sliding extrusion block; 401, rotating seat; 402, screw hole; 403, driving extrusion column; 404, limiting slide slot; 404A, limit hole; 405, support plate assembly; 405A, support plate; 405B, compression spring 1; 405C, limit column; 405D, slide hole; 5, limit plate; 501, compression spring 2; 6, installation cylinder; 601, placement notch; 601A, limit rotating piece; 602, installation slide; 603, extrusion vertical groove; 603A, extrusion top block; 603B, vertical groove; 603C, through groove; 604, Cylinder groove; 605, rotating groove; 605A, right baffle; 605B, left baffle; 605C, connecting port; 605D, limit rotating plate; 7, extrusion rod; 701, push bottom plate; 701A, limit rotating groove; 701B, slot 1; 702, push-pull rod 1; 703, push-pull rod 2; 703A, fixed slide frame; 704, friction block; 704A, compression spring 3; 705, upper compression spring; 706, lower Compression spring; 8, driving rotating rod; 801, rotating ring; 801A, slot two; 801B, squeezing rotating rod; 802, push-pull rod three; 803, top tooth wedge block; 9, backstop assembly; 901, backstop ring; 901A, top cover; 901B, opening; 902, rubber wedge block; 903, handle; 904, compression spring four; 905, fixing ring; 10, support rod; 1001, driving notch; 11, baffle. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings: The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0018] like Figure 1 , Figure 2 and Fig.10 As shown, a foundation pit support device for construction includes a pressing plate 1. By setting the pressing plate 1, after the ground nail 101 is inserted into the stratum, the expansion nail 204 is horizontally inserted into the soil layer, so as to increase the stability of the support device and prevent the support device from tilting and being lifted when the baffle 11 is subjected to a large extrusion force; the bottom of the pressing plate 1 is fixedly connected to the ground nail 101, and the bottom of the inner wall of the ground nail 101 is fixedly provided with a sliding groove 3 104, such as Figure 3 and Figure 4 As shown, an extension component 2 is slidably provided on the inner wall of the ground nail 101. When the extension component 2 is pressed down, the extension nail 204 is driven to extend from the side wall of the ground nail 101 and inserted into the soil layer. When the extension component 2 is lifted upward, the extension nail 204 is driven to retract into the ground nail 101, so that the ground nail 101 can be quickly pulled out after the support operation is completed; a slide groove 102 is fixedly provided on the top of the pressure plate 1, and a sliding extrusion block 4 is slidably connected to the slide groove 102, and the sliding extrusion block 4 can slide repeatedly on the slide groove 102; a slide groove 2 103 is fixedly provided at the bottom of the slide groove 102, and a plurality of groups of limiting plates 5 are slidably connected to the slide groove 2 103, and the limiting plates 5 can fix and limit the extension component 2 to prevent the extension component 2 from extending or retracting the ground nail 101 at will under the action of external force; The rear of the limit plate 5 is fixedly connected with a compression spring 501, and the side wall of the slide groove 103 is fixedly provided with multiple groups of installation grooves 105. The inner wall of the installation groove 105 is fixedly connected to the other end of the compression spring 501. The side wall of the pressure plate 1 is rotatably connected with a screw rod 3, and one end of the screw rod 3 is fixedly connected with a rotating cap 301. The rotating cap 301 extends outward from the pressure plate 1. After the worker puts the support device in place, he inserts and rotates the rotating cap 301 with an electric wrench or other tool to drive the screw 3 to rotate quickly, and controls the sliding extrusion block 4 to move on the pressure plate 1; the top of the sliding extrusion block 4 is fixedly connected There is a swivel seat 401, which is rotatably connected to a mounting cylinder 6, a cylinder groove 604 is fixedly opened inside the mounting cylinder 6, and a support rod 10 is slidably connected to the cylinder groove 604. By setting the mounting cylinder 6 and the support rod 10, the length of the support rod 10 can be adjusted to squeeze and support the baffle 11. By using a hydraulic jack and other tools to repeatedly push the squeezing rod 7 upward, the support rod 10 can be driven to continuously extend. By pushing the squeezing rod 7 by a hydraulic jack and other tools, the support rod 10 can be allowed to slowly retract into the mounting cylinder 6 under the combined action of gravity and the pressure of the baffle 11. like Fig.16As shown, a plurality of driving slots 1001 are fixedly provided on the side wall of the support rod 10, and a baffle 11 is rotatably connected to the top of the support rod 10, and the baffle 11 supports the foundation pit guard plate to prevent the occurrence of conditions such as foundation pit collapse and landslide; the other end of the baffle 11 is rotatably connected to the pressure plate 1, and an extrusion rod 7 is slidably connected inside the installation cylinder 6, and a driving rotating rod 8 is rotatably connected to the extrusion rod 7. By setting the extrusion rod 7 and the driving rotating rod 8, when the extrusion rod 7 moves downward, the friction block 704 is driven to squeeze the support rod 10. The longer the distance the extrusion rod 7 moves downward, the greater the friction between the friction block 704 and the support rod 10, and the slower the speed at which the support rod 10 retracts into the installation cylinder 6. When the driving rotating rod 8 moves upward, the driving slot 1001 is buckled by the top tooth wedge block 803 to lift the support rod 10 upward; The top of the installation tube 6 is fixedly connected with a backstop assembly 9, and the backstop assembly 9, the extrusion rod 7 and the driving rotating rod 8 are all matched with the support rod 10. By setting the backstop assembly 9 and utilizing the structural features between the backstop ring 901 and the rubber wedge block 902, when the support rod 10 drives the multiple groups of rubber wedge blocks 902 to move downward, the rubber wedge blocks 902 squeeze the backstop ring 901, and at the same time, the backstop ring 901 squeezes the rubber wedge blocks 902 toward the support rod 10 again, so that the more the support rod 10 moves downward, the greater the friction force of the rubber wedge blocks 902 is, so that the support rod 10 can only extend relative to the installation tube 6, providing a long-term support force for the baffle 11, and when the handle 903 is pulled upward, the rubber wedge blocks 902 are away from the backstop ring 901, and the support rod 10 can be retracted into the installation tube 6.

[0019] like Figure 6 , Figure 7 and Figure 8 As shown, the sliding extrusion block 4 is fixedly provided with a screw hole 402, which is meshed with the screw rod 3, and driving extrusion columns 403 are fixedly connected on both sides of the sliding extrusion block 4. A limiting slide groove 404 is fixedly provided on the upper part of the sliding extrusion block 4, and a plurality of groups of limiting holes 404A are fixedly provided on the inner wall of the limiting slide groove 404. A support plate assembly 405 is slidably connected in the limiting slide groove 404, and support plates 405A are fixedly connected on both sides of the support plate assembly 405. The support plate 405A cooperates with the limiting plate 5, and a sliding hole 405D is fixedly provided in the middle of the support plate assembly 405. Two groups of limiting columns 405C are slidably connected in the sliding inner part, and a compression spring 405B is fixedly connected between the two groups of limiting columns 405C, and the limiting column 405C cooperates with the limiting hole 404A.

[0020] When the support plate assembly 405 slides to the front end or the rear end in the limiting slide groove 404, the limiting column 405C is inserted into the limiting hole 404A under the elastic force of the compression spring 1 405B. When the support plate assembly 405 slides back and forth with the sliding extrusion block 4, the support plate 405A can open the limiting plate 5 outward, thereby adjusting the position of the extension component 2. When the sliding extrusion block 4 moves to the front end of the slide groove 103, the support plate 405A collides with the side wall of the slide groove 103 and overcomes the limiting effect of the limiting column 405C and moves backward. At this time, the limiting column 405C is again in contact with the limiting hole 404A at the rear. The support plate 405A protrudes backward relative to the sliding extrusion block 4, and the front part of the support plate 405A is flush with the front end face of the sliding extrusion block 4. When the sliding extrusion block 4 moves backward, since the support plate 405A protrudes further backward, the support plate 405A will open the limit plate 5 before the sliding extrusion block 4 contacts the expansion component 2, so as to facilitate the adjustment of the position of the expansion component 2. After the position of the expansion component 2 is adjusted, since the front part of the support plate 405A is flush with the front end face of the sliding extrusion block 4, the limit plate 5 can limit and fix the position of the expansion component 2 at the moment when the expansion component 2 is adjusted. like Figure 5 and Fig. 9 As shown, a driving pressing groove 201 is fixedly opened on the inner wall of the top of the expansion component 2, and the driving pressing groove 201 cooperates with the driving extrusion column 403. When the sliding extrusion block 4 slides and unfolds from the front to the back, it drives the driving extrusion column 403 to contact with the driving pressing groove 201, and squeezes the expansion component 2 downward, thereby driving the expansion nail 204 to extend from the slide groove 104 and insert into the soil layer, thereby improving the stability of the support device. When the sliding extrusion block 4 slides and retracts from the back to the front, it drives the driving extrusion column 403 to contact with the driving pressing groove 201. 1, lift the expansion component 2 upward, thereby driving the expansion nail 204 to retract into the slide groove three 104 and leave the soil layer; a plurality of groups of latch teeth 202 are fixedly connected to the outer wall of the top of the expansion component 2, and the latch teeth 202 cooperate with the limit plate 5. By setting the latch teeth 202, the friction between the expansion component 2 and the limit plate 5 can be improved; the two sides of the bottom of the expansion component 2 are rotatably connected with the connecting blocks 203, and the other end of the connecting block 203 is rotatably connected with the expansion nail 204, and the expansion nail 204 is slidably connected with the slide groove three 104.

[0021] like Fig.11 , Fig.12 and Fig.13As shown, the bottom of the extrusion rod 7 is fixedly connected to a pushing base plate 701, upper compression springs 705 are fixedly connected to the upper parts of both sides of the pushing base plate 701, lower compression springs 706 are fixedly connected to the lower parts of both sides of the pushing base plate 701, a limited rotation groove 701A is fixedly provided on the upper part of the pushing base plate 701, and a slot 1 701B is fixedly provided at the bottom of the limited rotation groove 701A, a push-pull rod 1 702 is fixedly connected to the top of the pushing base plate 701, a push-pull rod 2 703 is fixedly connected to the top of the push-pull rod 1 702, a fixed sliding frame 703A is fixedly connected to the top of the push-pull rod 2 703, a friction block 704 is slidably connected to the fixed sliding frame 703A, a compression spring 3 704A is fixedly connected to the side wall of the friction block 704, the other end of the compression spring 3 704A is fixedly connected to the inner side wall of the fixed sliding frame 703A, and the friction block 704 cooperates with the side wall of the support rod 10.

[0022] The push bottom plate 701 is kept in the middle of the placement slot 601 under the elastic force of the upper compression spring 705 and the lower compression spring 706. The worker can use the hydraulic jack to push the push bottom plate 701 upward by placing the hydraulic jack at the lower position of the placement slot 601. When the worker places the hydraulic jack at the upper position of the placement slot 601, the hydraulic jack can be used to press the push bottom plate 701 downward. Since the push bottom plate 701 is rotatably connected to the swivel 801, the upward and downward movement of the push bottom plate 701 can also drive the swivel 801 to move in the upward and downward directions; when the push bottom plate 701 moves in the upper area of ​​the placement slot 601, the friction block 704 cannot apply friction to the support rod 10. When the push bottom plate 701 moves in the lower area of ​​the placement slot 601, the friction block 704 continuously squeezes the support rod 10 under the limiting action of the squeezing top block 603A. The further the push bottom plate 701 moves downward, the greater the squeezing force of the friction block 704 on the support rod 10. like Fig.14 and Fig.15 As shown, a swivel 801 is fixedly provided at the bottom of the driving rotating rod 8, and the swivel 801 cooperates with the limiting rotating groove 701A. A slot 2 801A is fixedly provided on the swivel 801, and an extrusion rotating rod 801B is fixedly connected to the bottom of the slot 2 801A. A push-pull rod 3 802 is fixedly connected to the top of the swivel 801, and a top tooth wedge block 803 is fixedly connected to the top of the push-pull rod 3 802, and the top tooth wedge block 803 cooperates with the driving slot 1001.

[0023] While the driving rotating rod 8 moves up and down relative to the mounting tube 6, it can also rotate at a certain angle relative to the mounting tube 6, so as to adjust the contact area between the top tooth wedge block 803 and the right baffle 605A or the left baffle 605B. When in contact with different areas, the driving rotating rod 8 has different functions: 1. When the top tooth wedge block 803 cooperates with the connecting port 605C area on the upper part of the right baffle 605A, the top tooth wedge block 803 cooperates with the driving notch 1001, and the driving rotating rod 8 can drive the support rod 10 to move upward; 2. When the top tooth wedge block 803 is in contact with the connecting port 605C area on the upper part of the right baffle 605A, the top tooth wedge block 803 cooperates with the driving notch 1001, and the driving rotating rod 8 can drive the support rod 10 to move upward; 3. When the top tooth wedge block 803 is in contact with the connecting port 605C area on the upper part of the right baffle 605A, the top tooth wedge block 803 cooperates with the driving notch 1001, and the driving rotating rod 8 can drive the support rod 10 to move upward; 4. When the top tooth wedge block 803 is in contact with the connecting port 605C area on the upper part of the right baffle 605A, the top tooth wedge block 803 is in contact with the driving notch 1001, and the driving rotating rod 8 can drive the support rod 10 to move upward; 5. 1. When the top tooth wedge block 803 contacts the lower area of ​​the right baffle plate 605A, as the driving rotating rod 8 moves downward, the top tooth wedge block 803 is stretched open by the right baffle plate 605A and loses contact with the support rod 10; 2. When the top tooth wedge block 803 contacts the lower area of ​​the left baffle plate 605B, the top tooth wedge block 803 continues to be unable to contact the support rod 10; 3. When the top tooth wedge block 803 contacts the upper area of ​​the left baffle plate 605B, as the driving rotating rod 8 moves upward, the top tooth wedge block 803 rotates under the limiting action of the limiting rotating plate 605D and moves to the area of ​​the connecting port 605C.

[0024] like Fig.18 , Fig.19 , Fig. 20 and Fig.21 As shown, a placement slot 601 is fixedly provided at the bottom of the installation cylinder 6, and a limit rotating piece 601A is fixedly connected to the bottom of the placement slot 601. The limit rotating piece 601A cooperates with the extrusion rotating rod 801B. When the driving rotating rod 8 moves downward to the lowest position, the extrusion rotating rod 801B contacts the limit rotating piece 601A, so that the driving rotating rod 8 rotates to the left, and the top tooth wedge block 803 is driven by the push-pull rod 3 802 to move to the area of ​​the left baffle 605B; installation slide grooves 602 are fixedly provided on both sides of the placement slot 601, and the installation slide grooves 602 are slidably connected to the pushing bottom plate 701. The top inner wall of the installation slide groove 602 It is fixedly connected to the top of the upper compression spring 705, the bottom inner wall of the mounting slide groove 602 is fixedly connected to the bottom end of the lower compression spring 706, the left and right parts of the mounting cylinder 6 are fixedly provided with extrusion vertical grooves 603, the extrusion vertical grooves 603 are slidably connected to the fixed slide frame 703A, the bottom of the extrusion vertical groove 603 is fixedly connected with an extrusion top block 603A, the extrusion top block 603A cooperates with the friction block 704, the bottom of the extrusion top block 603A is fixedly provided with a vertical groove 603B, the vertical groove 603B is slidably connected to the push-pull rod 2 703, the bottom of the cylinder groove 604 is fixedly provided with a through groove 603C, the through groove 603C is slidably connected to the push-pull rod 1 702. When the push base 701 moves in the upper area of ​​the placement slot 601, the friction block 704 moves in the installation slide groove 602. At this time, the friction block 704 does not contact the support rod 10 due to the elastic force of the compression spring three 704A. When the push base 701 moves in the lower area of ​​the placement slot 601, the friction block 704 is pushed by the extrusion top block 603A to squeeze the support rod 10.

[0025] like Fig. 22 , Fig.23 and Fig.24 As shown, the upper and lower parts of the mounting cylinder 6 are fixedly provided with a rotation groove 605, and the rotation groove 605 cooperates with the push-pull rod three 802. The space of the rotation groove 605 is relatively large, allowing the push-pull rod three 802 to rotate at a certain angle in the rotation groove 605; the rotation groove 605 is fixedly connected with a right baffle plate 605A and a left baffle plate 605B, and the top of the right baffle plate 605A is fixedly provided with a connecting port 605C, and the connecting port 605C connects the rotation groove 605 with the cylinder groove 604, and the top of the left baffle plate 605B is fixedly connected with a limited rotation plate 605D, and the limited rotation plate 605D cooperates with the top tooth wedge block 803.

[0026] When the driving rotating rod 8 follows the pushing base plate 701 to move in the upper area of ​​the placement slot 601, the top tooth wedge block 803 cooperates with the connecting port 605C. When the pushing base plate 701 just moves downward to the lower part of the placement slot 601, the top tooth wedge block 803 still cooperates with the connecting port 605C. As the pushing base plate 701 continues to move downward, the top tooth wedge block 803 begins to contact the right baffle plate 605A. When the pushing base plate 701 moves downward to the bottom, under the joint action of the limiting rotating plate 601A and the extruding rotating rod 801B, the driving rotating rod 8 begins to rotate to the left, and the top tooth wedge block 803 contacts the left baffle plate 605B. When the pushing base plate 701 moves upward again to the upper area of ​​the placement slot 601, the top tooth wedge block 803 contacts the limiting rotating plate 605D and rotates right to the area of ​​the connecting port 605C.

[0027] like Fig.17 As shown, the anti-retraction assembly 9 includes an anti-retraction ring 901, a top cover 901A is fixedly connected to the top of the anti-retraction ring 901, an opening 901B is fixedly opened on the top cover 901A, a rubber wedge 902 is provided on the anti-retraction ring 901, the rubber wedge 902 cooperates with the support rod 10, a handle 903 is connected to the top of the rubber wedge 902, a compression spring four 904 is fixedly provided on the outer side of the handle 903, a fixing ring 905 is fixedly connected to the upper part of the handle 903, the fixing ring 905 cooperates with the opening 901B, and the compression spring four 904 cooperates with the inner wall of the top cover 901A. Under normal conditions, the fixing ring 905 is inside the top cover 901A. At this time, under the elastic force of the compression spring 904, the rubber wedge block 902 keeps in contact with the support rod 10 and the anti-retraction ring 901, and the support rod 10 is prevented from retreating. When the support rod 10 needs to be retracted into the installation tube 6, the handle 903 is pulled upward to pull the fixing ring 905 from the opening 901B to the outside of the top cover 901A. At this time, the rubber wedge block 902 is out of contact with the anti-retraction ring 901, and the support rod 10 cannot be prevented from retreating.

[0028] Usage process: 1. Place the folded support device at the designated location and press it down to insert the ground nail 101 deeply into the ground. Use an electric wrench or other tool to rotate the rotating cap 301. Slide the extrusion block 4 to drive the bottom of the installation tube 6 to gradually move to the right, and gradually unfold the installation tube 6: 2. During the expansion process, the sliding extrusion block 4 contacts and squeezes each group of expansion components 2 one by one, so that the expansion nails 204 of each group of expansion components 2 extend out of the ground nails 101 and insert into the soil layer. When the sliding extrusion block 4 moves to the rightmost side of the chute 102, the expansion operation is completed; 3. Place the hydraulic jack at the lower part of the placement slot 601, so that the bottom plate 701 can be pushed up. At this time, the top tooth wedge block 803 pushes the support rod 10 upward, and the backstop assembly 9 allows the support rod 10 to extend upward, pushing the bottom plate 701 to move to the middle of the placement slot 601 under the elastic force of the upper compression spring 705. The top tooth wedge block 803 is deformed and moves downward along the support rod 10. The backstop assembly 9 prevents the support rod 10 from retracting, and the hydraulic jack extends again, so that the support rod 10 can be continuously extended out of the installation tube 6, thereby supporting the baffle 11, and completing the support operation of the foundation pit; 4. During the process of supporting the foundation pit, the stop assembly 9 is responsible for limiting the position of the support rod 10, and the driving rotating rod 8 does not need to bear the pressure of the support rod 10 during this period, thereby increasing the service life of the driving rotating rod 8; 5. When the support operation is completed, the hydraulic jack is placed again at the bottom of the placement slot 601 and lifted up. The top tooth wedge block 803 slightly lifts the support rod 10 to facilitate the release of pressure of the backstop assembly 9. The handle 903 is pulled to pull the fixing ring 905 from the opening 901B to the upper part of the top cover 901A, so that the backstop assembly 9 loses the backstop operation ability. The downward pressure of the support rod 10 is borne by the driving rotating rod 8. 6. Control the hydraulic jack to gradually retract, pushing the bottom plate 701 to continue to move downward under the pressure of the support rod 10. In the early stage of the downward movement, the driving rod 8 bears the pressure of the support rod 10 while driving the support rod 10 to move downward for a distance. At the same time, the friction block 704 on the squeezing rod 7 starts to squeeze the support rod 10 and gradually increases the squeezing force, and finally completely clamps the support rod 10; 7. Place the hydraulic rod on the upper part of the placement slot 601 and squeeze the bottom plate 701 downwards, so that the bottom plate 701 continues to move downwards, and the top tooth wedge block 803 on the driving rotating rod 8 is forcibly opened by the right stop 605A and separated from the support rod 10, and deflected with the help of the limit rotating piece 601A, and the top tooth wedge block 803 contacts the left stop plate 605B, and the pressure of the support rod 10 is completely borne by the friction block 704, and the friction block 704 continues to increase the squeezing force on the support rod 10, and directly transmits the pressure of the support rod 10 to the installation cylinder 6; 8. Place the hydraulic rod again at the lower part of the placement slot 601 and push the bottom plate 701 upward. During this process, the top tooth wedge block 803 is in contact with the left baffle plate 605B throughout the entire process, but at the same time, the friction force of the friction block 704 on the support rod 10 gradually decreases. By controlling the degree to which the hydraulic rod pushes the bottom plate 701 upward, the friction force of the friction block 704 on the support rod 10 can be adjusted, so that the support rod 10 is slowly retracted into the installation cylinder 6 under the action of gravity. 9. Use an electric wrench to reversely rotate the rotating cap 301, slide the sliding extrusion block 4 to the left to retract the installation cylinder 6, and while moving, retract the expansion pin 204 of the expansion component 2 into the sliding groove 3 104, thus completing the support operation; The present invention provides a pressure plate 1, inserts the ground nail 101 into the stratum, and then laterally inserts the expansion nail 204 into the soil layer, thereby increasing the stability of the support device and preventing the support device from tilting and being lifted up when the baffle 11 is subjected to a large extrusion force; by providing an installation tube 6 and a support rod 10, the baffle 11 can be squeezed and supported by adjusting the extended length of the support rod 10, and the support rod 10 can be driven to continuously extend by repeatedly pushing the extrusion rod 7 upwards using a tool such as a hydraulic jack, and the extrusion rod 7 can be pushed by a tool such as a hydraulic jack, so that the support rod 10 can begin to slowly retract the installation tube 6 under the combined action of gravity and the pressure of the baffle 11, thereby improving the support device. Convenience of use: by setting up the anti-recognition component 9 and utilizing the structural features between the anti-recognition ring 901 and the rubber wedge block 902, when the support rod 10 drives multiple groups of rubber wedge blocks 902 to move downward, the rubber wedge blocks 902 squeeze the anti-recognition ring 901, and at the same time, the anti-recognition ring 901 squeezes the rubber wedge blocks 902 toward the support rod 10 again, so that the further the support rod 10 moves downward, the greater the friction force it is subjected to by the rubber wedge blocks 902, so that the support rod 10 can only extend relative to the mounting tube 6, providing long-term supporting force for the baffle 11, and when the handle 903 is pulled upward, the rubber wedge blocks 902 are away from the anti-recognition ring 901, and the support rod 10 can be retracted into the mounting tube 6.

Claims

1. A foundation pit support device for building construction, characterized in that: The invention comprises a pressure plate (1), wherein the bottom of the pressure plate (1) is fixedly connected to a ground nail (101), the bottom of the inner wall of the ground nail (101) is fixedly provided with a third slide groove (104), the inner wall of the ground nail (101) is slidably provided with an expansion component (2), the top of the pressure plate (1) is fixedly provided with a first slide groove (102), the first slide groove (102) is slidably connected with a sliding extrusion block (4), the bottom of the first slide groove (102) is fixedly provided with a second slide groove (103), the second slide groove (103) is slidably connected with a plurality of limit plates (5), the rear of the limit plate (5) is fixedly connected with a second compression spring (501), the side wall of the second slide groove (103) is fixedly provided with a plurality of installation grooves (105), the inner wall of the installation groove (105) is fixedly connected to the other end of the second compression spring (501), the side wall of the pressure plate (1) is rotatably connected with a screw rod (3), one end of the screw rod (3) is fixedly connected with a rotating The cap (301) is provided with a rotating cap (301) extending outwardly from the pressure plate (1). The top of the sliding extrusion block (4) is fixedly connected with a rotating seat (401). The rotating seat (401) is rotatably connected with a mounting cylinder (6). A cylinder groove (604) is fixedly provided inside the mounting cylinder (6). A support rod (10) is slidably connected with the cylinder groove (604). A plurality of groups of driving notches (1001) are fixedly provided on the side wall of the support rod (10). A baffle plate (11) is rotatably connected with the top of the support rod (10). The other end of the baffle plate (11) is rotatably connected with the pressure plate (1). An extrusion rod (7) is slidably connected inside the mounting cylinder (6). A driving rotating rod (8) is rotatably connected to the extrusion rod (7). A backstop assembly (9) is fixedly connected with the top of the mounting cylinder (6). The backstop assembly (9), the extrusion rod (7) and the driving rotating rod (8) are all matched with the support rod (10).

2. A foundation pit support device for construction according to claim 1, characterized in that: The sliding extrusion block (4) is fixedly provided with a screw hole (402), the screw hole (402) is meshedly connected with the screw rod (3), driving extrusion columns (403) are fixedly connected to both sides of the sliding extrusion block (4), a limiting slide groove (404) is fixedly provided on the upper part of the sliding extrusion block (4), a plurality of groups of limiting holes (404A) are fixedly provided on the inner wall of the limiting slide groove (404), a support plate assembly (405) is slidably connected in the limiting slide groove (404), support plates (405A) are fixedly connected on both sides of the support plate assembly (405), the support plate (405A) cooperates with the limiting plate (5), a sliding hole (405D) is fixedly provided in the middle of the support plate assembly (405), two groups of limiting columns (405C) are slidably connected in the sliding part, a compression spring (405B) is fixedly connected between the two groups of limiting columns (405C), and the limiting column (405C) cooperates with the limiting hole (404A).

3. A foundation pit support device for construction according to claim 1, characterized in that: A driving pressing groove (201) is fixedly provided on the inner wall at the top of the extension component (2), and the driving pressing groove (201) cooperates with the driving extrusion column (403). A plurality of groups of latch teeth (202) are fixedly connected to the outer wall at the top of the extension component (2), and the latch teeth (202) cooperate with the limit plate (5). Connecting blocks (203) are rotatably connected to the two sides of the bottom of the extension component (2), and the other end of the connecting block (203) is rotatably connected to an expansion pin (204), and the expansion pin (204) is slidably connected to the third slide groove (104).

4. A foundation pit support device for construction according to claim 1, characterized in that: The bottom of the extrusion rod (7) is fixedly connected to a pushing base plate (701), upper compression springs (705) are fixedly connected to the upper parts of both sides of the pushing base plate (701), lower compression springs (706) are fixedly connected to the lower parts of both sides of the pushing base plate (701), a limited rotation groove (701A) is fixedly provided on the upper part of the pushing base plate (701), a slot (701B) is fixedly provided on the bottom of the limited rotation groove (701A), and a push-pull rod (702) is fixedly connected to the top of the pushing base plate (701). The top of the push-pull rod 1 (702) is fixedly connected to the push-pull rod 2 (703), the top of the push-pull rod 2 (703) is fixedly connected to the fixed sliding frame (703A), the fixed sliding frame (703A) is slidably connected to a friction block (704), the side wall of the friction block (704) is fixedly connected to a compression spring 3 (704A), the other end of the compression spring 3 (704A) is fixedly connected to the inner side wall of the fixed sliding frame (703A), and the friction block (704) cooperates with the side wall of the support rod (10).

5. A foundation pit support device for construction according to claim 1, characterized in that: The bottom of the driving rotating rod (8) is fixedly provided with a rotating ring (801), the rotating ring (801) cooperates with the limiting rotating groove (701A), the rotating ring (801) is fixedly provided with a second slot (801A), the bottom of the second slot (801A) is fixedly connected to an extruding rotating rod (801B), the top of the rotating ring (801) is fixedly connected to a push-pull rod three (802), the top of the push-pull rod three (802) is fixedly connected to a top tooth wedge block (803), and the top tooth wedge block (803) cooperates with the driving notch (1001).

6. A foundation pit support device for construction according to claim 1, characterized in that: The bottom of the installation tube (6) is fixedly provided with a placement slot (601), the bottom of the placement slot (601) is fixedly connected to a limit rotating plate (601A), the limit rotating plate (601A) cooperates with the extrusion rotating rod (801B), and installation slide grooves (602) are fixedly provided on both sides of the placement slot (601), the installation slide grooves (602) are slidably connected to the pushing bottom plate (701), the top inner wall of the installation slide groove (602) is fixedly connected to the top of the upper compression spring (705), the bottom inner wall of the installation slide groove (602) is fixedly connected to the bottom end of the lower compression spring (706), and the installation tube (6) is fixedly provided with a placement slot (601). The left and right parts are both fixedly provided with an extrusion vertical groove (603), the extrusion vertical groove (603) is slidably connected to a fixed sliding frame (703A), the bottom of the extrusion vertical groove (603) is fixedly connected with an extrusion top block (603A), the extrusion top block (603A) cooperates with a friction block (704), the bottom of the extrusion top block (603A) is fixedly provided with a vertical groove (603B), the vertical groove (603B) is slidably connected to the second push-pull rod (703), the bottom of the barrel groove (604) is fixedly provided with a through groove (603C), and the through groove (603C) is slidably connected to the first push-pull rod (702).

7. A foundation pit support device for construction according to claim 1, characterized in that: The upper and lower parts of the installation cylinder (6) are fixedly provided with a rotation groove (605), the rotation groove (605) cooperates with the push-pull rod three (802), the rotation groove (605) is fixedly connected with a right baffle plate (605A) and a left baffle plate (605B), the top of the right baffle plate (605A) is fixedly provided with a connecting port (605C), the connecting port (605C connects the rotation groove (605) with the cylinder groove (604), the top of the left baffle plate (605B) is fixedly connected with a limited rotation plate (605D), and the limited rotation plate (605D) cooperates with the top tooth wedge block (803).

8. A foundation pit support device for construction according to claim 1, characterized in that: The anti-recoil assembly (9) comprises an anti-recoil ring (901), the top of the anti-recoil ring (901) is fixedly connected to a top cover (901A), the top cover (901A) is fixedly provided with an opening (901B), the anti-recoil ring (901) is provided with a rubber wedge (902), the rubber wedge (902) cooperates with the support rod (10), the top of the rubber wedge (902) is connected to a handle (903), the outer side of the handle (903) is fixedly provided with a fourth compression spring (904), the upper part of the handle (903) is fixedly connected to a fixing ring (905), the fixing ring (905) cooperates with the opening (901B), and the fourth compression spring (904) cooperates with the inner wall of the top cover (901A).

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