A deep foundation pit support structure for building construction

Abstract

This invention discloses a deep foundation pit support structure for building construction, comprising a base, a base plate, and an adjusting plate. The base plate is vertically fixed on the base, and several first diagonal braces are connected between the rear end of the base plate and the base. A transition plate is fixed to the top of the base plate, and sliding grooves are provided at both ends of the transition plate. Sliding seats are provided at both ends of the bottom of the adjusting plate, and the sliding seats are slidably assembled on the corresponding sliding grooves, allowing the adjusting plate to move vertically along the transition plate. A lead screw and several sliding rods are provided at the top of the rear end of the base plate, and the lead screw and sliding rods are arranged parallel to the base. A support seat is provided at the rear end of the base, and the other ends of the lead screw and sliding rods are connected to the support seat. An adjusting seat is threaded into the lead screw. This invention converts horizontal displacement into vertical thrust through a linkage mechanism of lead screw and hinge, thereby driving the adjusting plate to move and adjust in the vertical direction, realizing stepless adjustment of the support height, and completely solving the problem of repetitive design caused by changes in foundation pit depth in fixed structures.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically a deep foundation pit support structure for building construction. Background Technology

[0002] A deep foundation pit refers to an excavation depth exceeding 5 meters (including 5 meters), or an engineering project with particularly complex geological conditions, surrounding environment, and underground pipelines, even if the depth does not exceed 5 meters. Deep foundation pit support refers to the measures taken to support, reinforce, and protect the sidewalls and surrounding environment of a deep foundation pit to ensure the safety of underground structure construction and the surrounding environment.

[0003] Current deep foundation pit support technologies in building construction mainly employ fixed structures (such as pile banks, diaphragm walls, and steel supports), whose height is fixed during the design phase. The limitations of this type of structure are as follows:

[0004] Insufficient adaptability: Support schemes need to be customized for different foundation pit depths, resulting in material redundancy or repeated design, which increases construction costs.

[0005] Significant waste of resources: Temporary support structures are difficult to reuse after demolition, generating a large amount of construction waste, which contradicts the concept of green construction.

[0006] Low construction efficiency: When the depth of the foundation pit changes, components need to be reinstalled or stacked, which prolongs the construction period. Summary of the Invention

[0007] The purpose of this invention is to provide a deep foundation pit support structure for building construction, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a deep foundation pit support structure for building construction, comprising a base, a base plate, and an adjusting plate. The base plate is vertically fixed on the base, and a plurality of first diagonal braces are connected between the rear end of the base plate and the base. A transition plate is fixed at the top of the base plate, and sliding grooves are provided at both the left and right ends of the transition plate. Sliding seats are provided at both the bottom ends of the adjusting plate, and the sliding seats are slidably assembled on the corresponding sliding grooves, so that the adjusting plate can move vertically along the transition plate.

[0009] The base plate has a lead screw and several slide rods at its rear end. The lead screw and slide rods are arranged parallel to the base. The base has a support seat at its rear end. The other end of the lead screw and slide rods is connected to the support seat. An adjustment seat is threaded onto the lead screw, and the side end of the adjustment seat is slidably connected to the slide rod. An adjustment frame for pushing is hinged on the adjustment seat. The other end of the adjustment frame is hinged to the top of the adjustment plate, so that when the adjustment seat moves horizontally, the adjustment frame drives the adjustment plate to rise and fall synchronously. A rotating wheel is rotatably provided at the rear end of the support seat, and the rotating shaft of the rotating wheel extends through and is connected to the lead screw.

[0010] The transition plate is provided with several movable pressure plates. When the adjusting plate moves upward under the action of the adjusting frame and is freed from the constraint of the pressure plates, the pressure plates can extend forward and abut against the pit wall.

[0011] Furthermore, the left side of the base plate and the adjustment plate are provided with a number of storage slots at equal intervals, and the right side is provided with a number of corresponding fixing slots at equal intervals. A connecting frame is hinged in the storage slot, and a bayonet is provided at the other end of the connecting frame. A locking rod corresponding to the bayonet is provided in the fixing slot.

[0012] Furthermore, the connecting frame has a fixing hole that passes through both the front and rear ends. A drill pipe is detachably installed in the fixing hole. The connecting frame has a fixing port that passes through both the upper and lower sides in the middle. A limit plate is slidably installed in the fixing port. A spring is connected between the limit plate and the front end of the fixing port. The limit plate has an opening corresponding to the fixing hole. Through holes are opened at both the left and right ends of the front side of the fixing hole. The through holes are connected to the fixing port. Limit rods corresponding to the through holes are provided at both the left and right ends of the rear side of the drill pipe. A limit block is provided at the rear end of the drill pipe. The limit block is located at the rear end of the limit rod.

[0013] Furthermore, the outer circumferential surface of the drill pipe is provided with a plurality of barbs, and the rear end of the barbs is provided with a water inlet hole, which is connected to the inside of the drill pipe. An inner tube is movably arranged inside the drill pipe, and water inlets are provided at equal intervals on the outer circumferential surface of the inner tube. A baffle is provided on the water inlet.

[0014] Furthermore, the connecting frame has pile holes that extend through both the upper and lower sides, and the central axes of all pile holes on the same side are in the same vertical plane, forming a positioning channel for the vertical penetration of the fixed pile.

[0015] Furthermore, the front end of the transition plate is provided with several placement slots, the pressure plate is located in the placement slots, and push rods are provided on both the left and right sides of the rear end of the pressure plate. The rear end face of the transition plate is provided with several fixed cylinders corresponding to the push rods. The push rods pass through the transition plate and extend into the fixed cylinders. The rear end of the push rods is rotatably provided with push blocks. A thrust spring is connected between the push blocks and the rear end of the inner wall of the fixed cylinders. The left and right ends of the fixed cylinders are provided with slide openings. The rear end of the slide openings is provided with limit openings. The limit openings and slide openings are staggered. The left and right ends of the push blocks are provided with locking rods. The locking rods extend out of the slide openings and can rotate along the slide openings to the limit openings to form a self-locking mechanism.

[0016] Furthermore, a second inclined support is connected between the top left and right sides of the transition plate and the top of the support base, and a third inclined support is connected between the top front end of the support base and the bottom rear end of the substrate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention converts horizontal displacement into vertical thrust through a linkage mechanism of lead screw and hinge, thereby driving the adjustment plate to move and adjust in the vertical direction, realizing stepless adjustment of the support height, and completely solving the problem of repetitive design caused by changes in the depth of the foundation pit in fixed structures; through the mechanical self-locking structure of the pressure plate, the plate pops out and abuts against the pit wall after it rises, working together with the base plate and the adjustment plate to complete the upper, middle and lower sections of the foundation pit support, improving the overall support effect of the support structure;

[0019] 2. The foldable connecting frame of this invention allows for the rapid assembly of adjacent support units, thereby forming a continuous shear wall. Combined with integrated anchoring and drainage drilling pipes, it enables the connection between support units and coordinated water and soil control. The overall structure creates a self-locking, continuous, and self-draining support system, significantly reducing construction costs and engineering risks, and promoting the upgrading of temporary support structures towards reusability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a deep foundation pit support structure for building construction according to the present invention;

[0021] Figure 2 This is a schematic diagram showing the connected state of multiple support structures in this invention;

[0022] Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the connecting frame structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the drill pipe structure of the present invention;

[0025] Figure 6 This is a cross-sectional view of the pressure plate of the present invention.

[0026] In the diagram, the components are: base-1, base plate-2, adjusting plate-3, first diagonal brace-4, transition plate-5, sliding groove-6, sliding seat-7, lead screw-8, sliding rod-9, support seat-10, adjusting seat-11, adjusting frame-12, rotating wheel-13, pressure plate-14, storage groove-15, connecting frame-16, bayonet-17, fixing hole-18, drill pipe-19, fixing port-20, limiting plate-21, spring-22, through hole-23, limiting rod-24, limiting block-25, barb-26, water inlet-27, inner tube-28, baffle net-29, pile hole-30, fixing pile-31, push rod-32, push block-33, thrust spring-34, sliding strip opening-35, limiting port-36, locking rod-37, second diagonal support-38, third diagonal support-39, and fixing cylinder-40. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, a deep foundation pit support structure for building construction includes a base 1, a base plate 2, and an adjusting plate 3. The base plate 2 is vertically fixed on the base 1, and several first diagonal braces 4 are connected between the rear end of the base plate 2 and the base 1. A transition plate 5 is fixed at the top of the base plate 2. Slide grooves 6 are provided at both the left and right ends of the transition plate 5. Slide seats 7 are provided at both the bottom ends of the adjusting plate 3. The slide seats 7 are slidably assembled on the corresponding slide grooves 6, so that the adjusting plate 3 can move vertically along the transition plate 5.

[0029] The rear end of the base plate 2 is provided with a lead screw 8 and several slide rods 9. The lead screw 8 and slide rods 9 are arranged parallel to the base 1. The rear end of the base 1 is provided with a support seat 10. The other end of the lead screw 8 and slide rods 9 are connected to the support seat 10. An adjustment seat 11 is threadedly connected to the lead screw 8, and the side end of the adjustment seat 11 is slidably connected to the slide rod 9. An adjustment frame 12 for pushing is hinged on the adjustment seat 11. The other end of the adjustment frame 12 is hinged to the top of the adjustment plate 3. Thus, when the adjustment seat 11 moves horizontally, the adjustment frame 12 drives the adjustment plate 3 to rise and fall synchronously. The rear end of the support seat 10 is rotatably provided with a rotating wheel 13. The rotating shaft of the rotating wheel 13 extends through and is connected to the lead screw 8.

[0030] The transition plate 5 is provided with several movable pressure plates 14. When the adjusting plate 3 moves upward under the action of the adjusting frame 12 and gets rid of the constraint on the pressure plates 14, the pressure plates 14 can extend forward and abut against the pit wall.

[0031] In this embodiment, the front end of the transition plate 5 is provided with several placement slots, and the pressure plate 14 is located in the placement slots. Push rods 32 are provided on both the left and right sides of the rear end of the pressure plate 14. The rear end face of the transition plate 5 is provided with several fixed cylinders 40 corresponding to the push rods 32. The push rods 32 pass through the transition plate 5 and extend into the fixed cylinders 40. The rear end of the push rods 32 is rotatably provided with push blocks 33. A thrust spring 34 is connected between the push blocks 33 and the rear end of the inner wall of the fixed cylinder 40. Sliding slots 35 are provided at both the left and right ends of the fixed cylinder 40. The rear end of the sliding slots 35 is provided with... A limiting port 36 is provided, which is staggered with the slide bar opening 35. Both ends of the push block 33 are provided with locking rods 37. The locking rods 37 extend out of the slide bar opening 35 and can rotate along the slide bar opening 35 to the limiting port 36 to form a self-locking mechanism. Before installation, the locking rods 37 are pulled backward by the equipment, thereby driving the pressure plate 14 to be embedded into the placement groove and compressing the thrust spring 34. After the locking rods 37 have moved to the end, the locking rods 37 are rotated so that the locking rods 37 are rotated into the limiting port 36, thereby fixing the pressure plate 14.

[0032] The working principle of this embodiment is as follows: During installation, the support unit is hoisted to a predetermined position, so that the base plate 2 and the adjusting plate 3 are attached to the side wall of the pit. Then, the base 1 is anchored to the ground with multiple piles. Next, according to the depth of the pit, the worker rotates the rotating wheel 13, thereby driving the lead screw 8 to rotate and pushing the adjusting seat 11 to move horizontally away from the support seat 10 along the slide rod 9. The opening angle of the hinged adjusting frame 12 increases from 30° to 60°, converting the horizontal displacement into vertical thrust, which drives the adjusting plate. 3 rises along the slide 6 of the transition plate 5. When the adjustment plate 3 rises to the preset height, the base plate 2 and the adjustment plate 3 just support the upper and lower parts of the pit. At the same time, the bottom of the adjustment plate 3 disengages from the cover of the pressure plate 14 in the corresponding placement slot. The operator rotates the locking rod 37 on the corresponding fixed cylinder 40 counterclockwise, so that the locking rod 37 disengages from the limit port 36. The thrust spring 34 is released, thereby pushing the push rod 32 forward. The pressure plate 14 pops forward and abuts against the pit wall, thereby supporting the middle position of the pit through the pressure plate 14.

[0033] In this embodiment, the left side of the base plate 2 and the adjustment plate 3 are provided with a plurality of storage slots 15 at equal intervals, and the right side is provided with a plurality of corresponding fixing slots at equal intervals. A connecting frame 16 is hinged in the storage slot 15, and a bayonet 17 is provided at the other end of the connecting frame 16. A locking rod corresponding to the bayonet 17 is provided in the fixing slot. The connecting frame 16 is provided with pile holes 30 that pass through the upper and lower sides. The central axis of all pile holes 30 on the same side is in the same vertical plane, forming a positioning channel for the fixing pile 31 to be vertically inserted.

[0034] After the installation of multiple support units is completed, adjacent support units can be connected by unfolding the connecting frame 16. By pulling the connecting frame 16 out of the storage slot 15 and rotating it to the adjacent fixing slot, the end slot 17 of the connecting frame 16 engages with the locking rod in the fixing slot. After connecting all the connecting frames 16, the pile holes 30 on them are aligned to form a vertical channel. At this time, the fixing pile 31 is inserted and inserted into the ground, thereby forming a continuous shear wall, so that the various support units are connected as one, forming a continuous support surface.

[0035] In this embodiment, the connecting frame 16 has a fixing hole 18 extending through both the front and rear ends. A drill pipe 19 is detachably installed in the fixing hole 18. A fixing opening 20 extending through both the upper and lower sides is provided in the middle of the connecting frame 16. A limiting plate 21 is slidably installed in the fixing opening 20. A spring 22 is connected between the limiting plate 21 and the front end of the fixing opening 20. An opening corresponding to the fixing hole 18 is provided on the limiting plate 21. Through holes 23 are provided at both the left and right ends of the front side of the fixing hole 18. The through holes 23 and the fixing opening 20 are connected. The drill pipe 19 is connected to the drill pipe 19. Both the left and right ends of the rear side are provided with limiting rods 24 corresponding to the through holes 23. The rear end of the drill pipe 19 is provided with a limiting block 25, which is located at the rear end of the limiting rods 24. The outer circumferential surface of the drill pipe 19 is provided with several barbs 26. The rear end of the barbs 26 is provided with a water inlet hole 27, which is connected to the inside of the drill pipe 19. An inner tube 28 is movably installed inside the drill pipe 19. Water inlets are provided at equal intervals on the outer circumferential surface of the inner tube 28, and a baffle 29 is provided on the water inlet.

[0036] After the connecting frames 16 are unfolded and connected, the drill pipe 19 is inserted into the pit wall through the fixing hole 18 until the limiting rod 24 passes through the through hole 23 and the limiting block 25 abuts against the connecting frame 16. Then the drill pipe is rotated 90° so that the limiting rod 24 is misaligned with the through hole 23, thereby fixing the drill pipe 19 horizontally through the limiting block 25 and the limiting rod 24. At the same time, the limiting plate 21 applies pressure to the limiting rod 24 under the action of the spring 22 to prevent the limiting rod 24 from rotating on its own. After the drill pipe 19 is inserted into the pit wall, the barbs on it form an anchoring structure, thereby improving the pull-out resistance of the support unit.

[0037] During the insertion of the drill pipe 19, the water inlet on the inner tube 28 and the barb 26 are staggered, thus sealing the water inlet 27 of the barb 26 through the outer surface of the inner wall, preventing soil from entering the drill pipe 19 through the water inlet 27 during insertion. After the drill pipe 19 is installed, rotate the inner tube 28 so that the water inlet is aligned with the barb 26. If there is water in the pit wall, the water will flow to the drill pipe 19 immediately and enter the inner tube 28 through the water inlet 27, and finally flow out from the rear end of the inner tube 28. The baffle 29 filters the mud and sand, ensuring that the drainage channel is unobstructed. A collection trough can be placed at the bottom between the two support units to collect the outflowing seepage water. After a period of use, the inner tube 28 can be pulled out of the drill pipe to clean the mud and sand inside.

[0038] In this embodiment, the top left and right sides of the transition plate 5 are connected to the top of the support base 10, and the front top of the support base 10 is connected to the rear bottom of the base plate 2, and the second inclined support 38 and the third inclined support 39 are connected to each other. The second inclined support 38 and the third inclined support 39 work together to enhance the structural stability through the principle of triangular truss: the second inclined support 38 resists the lateral earth pressure transmitted by the pressure plate 14, suppresses the bending deformation of the transition plate 5, and ensures the flatness of the support surface; the third inclined support 39 balances the horizontal thrust component of the screw 8 system and prevents the support base 10 from tilting forward and becoming unstable. The two form a statically indeterminate structure, and the load is automatically redistributed when there is a local failure, which improves the overall anti-collapse ability of the support system.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A building construction deep foundation pit support structure, characterized by: The utility model provides a kind of adjustable support device, including base, base plate and adjusting plate, the base plate is vertically fixed on base, and the rear end of base plate is connected with several first inclined bracing between base, the top end of base plate is fixed with transition plate, the left and right ends of transition plate are all set with sliding slot, the bottom of adjusting plate both ends is provided with slide, the slide is slidably assembled in corresponding sliding slot, so that adjusting plate can be moved in vertical direction along transition plate; The rear end of base plate is provided with screw rod and several slide rods on top, the screw rod and slide rod are parallelly arranged with base, the rear end of base is provided with support seat, the other end of screw rod and slide rod is connected with support seat, the screw rod is threadedly connected with adjusting seat in inner, and the side end of adjusting seat is slidably connected with slide rod, the adjusting seat is hingedly provided with adjusting frame for pushing, the other end of adjusting frame is hingedly connected with the top of adjusting plate, so that adjusting plate is synchronously lifted when adjusting seat is horizontally moved by adjusting frame, the rear end of support seat is rotatably provided with rotating wheel, the rotating shaft of rotating wheel extends through and connects with screw rod; The transition plate is provided with several movable pressing plates, when adjusting plate is moved upward and separated from pressing plate under the action of adjusting frame, the pressing plate can be extended forward and abut against pit wall; The left side end of base plate and adjusting plate is all set with several storage grooves at equal intervals, the right side end is all set with several corresponding fixed slots at equal intervals, the connecting frame is hingedly provided in storage groove, the other end of connecting frame is provided with bayonet, the fixed slot is provided with corresponding clamping rod with the bayonet;The connecting frame is provided with through-hole on upper and lower sides, the center axis of all through-holes on the same side is in the same vertical plane, forming positioning channel for vertical penetration of fixing pile: The connecting frame is provided with fixed hole through front and back ends, the drilling pipe is detachably assembled in fixed hole, the connecting frame is provided with fixed port through upper and lower sides in the middle, the limiting plate is slidably arranged in fixed port, the spring is connected between the front end of limiting plate and fixed port, the opening corresponding to fixed hole is opened in limiting plate, the through hole is opened in the left and right ends of front side of fixed hole, the through hole is communicated with fixed port, the limiting rod corresponding to through hole is arranged in the left and right ends of rear side of drilling pipe, the limiting block is arranged in the rear end of drilling pipe; The front end of transition plate is provided with several placing grooves, the pressing plate is in placing groove, the left and right sides of rear end of pressing plate are provided with push rod, the rear end surface of transition plate is provided with several fixed cylinders corresponding to push rod, the push rod extends through transition plate and extends into fixed cylinder, the push block is rotatably arranged in the rear end of push rod, the push spring is connected between the rear end of push block and inner wall of fixed cylinder, the left and right ends of fixed cylinder are provided with slide slot, the rear end of slide slot is provided with limiting port, the limiting port and slide slot are staggered, the left and right ends of push block are provided with clamping rod, the clamping rod extends out of slide slot, and can be turned to limiting port along slide slot to form self-locking.

2. The building construction deep foundation pit support structure according to claim 1, characterized in that: The outer circumferential surface of the drill pipe is provided with a plurality of barb portions, rear ends of the barb portions are provided with water inlet holes, the water inlet holes are communicated with the inside of the drill pipe, an inner pipe is movably arranged in the drill pipe, the outer circumferential surface of the inner pipe is provided with water through holes at equal intervals, and the water through holes are provided with a screen.

3. The building construction deep foundation pit support structure according to claim 1, characterized in that: Second inclined supports are connected between the top of the transition plate and the top end of the support seat on the left and right sides, and a third inclined support is connected between the top of the front end of the support seat and the bottom of the rear end of the base plate.

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