Extruding and expanding supporting disc device capable of guaranteeing disc body construction quality and construction method

Abstract

The invention discloses an extruding and expanding supporting disc device capable of guaranteeing the construction quality of a disc body and a construction method.The extruding and expanding supporting disc device comprises a reinforcement cage, a supporting mechanism, a supporting panel and pull rods, the reinforcement cage is composed of a plurality of reinforcement cage longitudinal ribs distributed in the circumferential direction and annular stirrups arranged along the longitudinal ribs at intervals, and the pull rods are vertically assembled on the inner sides of the reinforcement cage longitudinal ribs; a plurality of supporting mechanisms are arranged on the outer side of a reinforcement cage at intervals in the longitudinal direction, each supporting mechanism comprises a plurality of supporting assemblies distributed in the circumferential direction, one ends of the supporting assemblies are fixedly connected with longitudinal ribs of the reinforcement cage, the other ends of the supporting assemblies are fixed to pull rods, the longitudinal ribs are kept fixed, and the pull rods can move up and down in a reciprocating mode relative to the supporting assemblies. And the pull rod is driven to move up and down, so that the supporting assembly is radially expanded and contracted. When the concrete is poured, the supporting panel applies the radial supporting force to the soil body around the disc body, hole collapse and hole shrinkage of the soil body are effectively avoided, the integrity of the concrete of the disc body is ensured, and the construction quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pile foundation engineering, and more particularly to an extruded supporting disc device and construction method capable of guaranteeing disc construction quality. BACKGROUND

[0002] As a kind of efficient foundation bearing structure, the core technical principle of the extruded supporting disc pile is that, through a special extruding machine with a hydraulic power system, a controllable extrusion force is applied to the soil around the hole wall at the preset position of the pile body by using the bow arm type working device, so that the soil is plastically deformed and compacted, and finally a plurality of conical disc-shaped cavities are formed around the pile body. After the extrusion operation is completed, the reinforcement cage is lowered into the hole, and then the concrete is poured through the guide pipe method, so that the concrete fills the main body of the pile hole and each disc-shaped cavity, and after solidification, a variable cross-section pile body composed of the main body of the pile and the multi-stage bearing disc is formed. This special structure greatly increases the contact area between the pile body and the soil, thereby significantly improving the vertical bearing capacity and uplift resistance.

[0003] Since the technology was gradually popularized and applied in China in the 1990s, after nearly three decades of engineering practice and technical iteration, a complete technical system covering geological survey adaptation, structural parameter design, construction equipment selection, site operation specification and quality detection evaluation has been formed. Its application scenarios have expanded from the initial high-rise building foundation to bridge pier foundation, port wharf bearing structure, large storage tank foundation, power transmission tower foundation and high-speed railway subgrade reinforcement, etc. In soft soil distribution areas such as the Yangtze River Delta and the Pearl River Delta, it has become an optimal solution to solve the bearing problem of soft soil foundation by precisely utilizing the advantages of deep silty clay, sand layer and other high-quality bearing layers.

[0004] Although the technology is becoming more and more perfect, the key link of supporting disc forming still has technical pain points that need to be broken through. For example, in loose sand layer, soft plastic soil layer and other adverse geological conditions, the disc cavity formed by extrusion has poor stability and is prone to collapse; even in stable stratum, the extrusion operation will also disturb the soil around the disc cavity. These problems directly lead to disc forming quality defects: hole wall collapse will make the designed conical disc body unable to form completely, causing the effective bearing area to be reduced, and the pile body bearing capacity to be greatly reduced; at the same time, the mixed soil in the concrete will also cause uneven concrete strength at the disc position, and even cause major engineering hazards such as broken pile and necking. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides an extrusion support disc device and construction method that can guarantee the construction quality of the disc body, wherein the support assembly adopts a composite hinge structure of a first connecting rod, a second connecting rod, a first reinforcing connecting rod and a second reinforcing connecting rod, and is matched with a modular connecting seat of a connecting barrel and an ear plate, so as to disperse the stress of the connecting rod across the middle, avoid bending deformation, and accurately and uniformly transmit force; the threaded locking design of the upper and lower fasteners can stably fix the support range, the support panel is composed of an upper disc opening, an upper disc surface, a lower disc surface and a lower disc opening made of stainless steel, and is flexibly spliced through a rubber connecting ring, can be synchronously expanded and contracted with the support assembly, the multi-point fixed connection of the panel with the connecting rod and the connecting seat ensures smooth linkage and can closely support the soil profile, reduces the support gap, ensures that the support state is not loose during concrete pouring, effectively resists the soil pressure and concrete lateral pressure, effectively avoids the problems of hole collapse and diameter reduction of the soil due to disturbance, ensures the integrity of the disc pouring space, and further guarantees the forming quality of the disc concrete, and reduces the pouring defects caused by soil collapse.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a disc body construction quality guaranteeing extrusion support disc device is provided, comprising a reinforcement cage, a support mechanism, a support panel and a pull rod; wherein, The reinforcement cage comprises a plurality of circumferentially arranged reinforcement cage longitudinal bars, and a plurality of hoop bars are arranged in the longitudinal direction of the reinforcement cage longitudinal bars, forming a stable cage body; The pull rod is vertically arranged and assembled on the inner side of the reinforcement cage longitudinal bar, and a plurality of support mechanisms are arranged on the outer side of the reinforcement cage longitudinal bar in the longitudinal direction, each support mechanism comprises a plurality of support assemblies arranged in sequence in the circumferential direction of the reinforcement cage longitudinal bar, one end of the support assembly is fixedly connected with the reinforcement cage longitudinal bar, the other end is fixedly connected with the pull rod, and the reinforcement cage longitudinal bar remains in a fixed state, and the pull rod can move up and down relative to the reinforcement cage longitudinal bar; The outer side of the support assembly is fixedly provided with a support panel, and the support panel and the support assembly form a linkage structure and can move synchronously with the support assembly, and by driving the pull rod to move up and down, the radial expansion and contraction of the support assembly can be realized synchronously, and during the concrete pouring operation, the support panel can apply a radial support force to the soil around the disc body, effectively avoiding the problems of hole collapse and diameter reduction of the soil due to disturbance, and ensuring the integrity of the disc pouring space.

[0007] Further, the support assembly comprises a first connecting seat, a second connecting seat, a first connecting rod, a second connecting rod, a third connecting seat, a transmission member, an upper fastener and a lower fastener, the first connecting seat is fixedly sleeved on the outer sidewall of the longitudinal reinforcement cage, the third connecting seat is movably sleeved on the outer sidewall of the longitudinal reinforcement cage and arranged below the first connecting seat along the axial direction of the longitudinal reinforcement cage and can slide along the axial direction of the longitudinal reinforcement cage, the first connecting seat is hingedly connected to one end of the second connecting rod, the other end of the second connecting rod is hingedly connected to one end of the first connecting rod, the other end of the first connecting rod is hingedly connected to the third connecting seat, the inner side of the third connecting seat is fixedly connected to the transmission member, the transmission member is movably sleeved on the outer sidewall of the pull rod, the upper end of the transmission member is provided with the upper fastener, and the lower end of the transmission member is provided with the lower fastener, and the upper fastener and the lower fastener are threadedly connected to the pull rod.

[0008] Further, the support assembly further comprises a first reinforcing connecting rod, a second reinforcing connecting rod and a second connecting seat, the second connecting seat is movably sleeved on the outer sidewall of the longitudinal reinforcement cage and arranged between the first connecting seat and the third connecting seat along the axial direction of the longitudinal reinforcement cage and can slide along the axial direction of the longitudinal reinforcement cage. One end of the first reinforcing connecting rod and the second reinforcing connecting rod is hingedly connected to the second connecting seat, the other end of the first reinforcing connecting rod is hingedly connected to the middle region of the second connecting rod, and the other end of the second reinforcing connecting rod is hingedly connected to the middle region of the first connecting rod, and the first connecting rod and the second connecting rod jointly form a multi-node cooperative stress composite support mechanism.

[0009] Further, the first connecting seat comprises a first connecting cylinder and a first connecting ear plate, the first connecting ear plate is fixedly assembled on the outer sidewall of the first connecting cylinder, and the first connecting ear plate is hingedly connected to one end of the second connecting rod, and the first connecting cylinder is fixedly sleeved on the outer sidewall of the longitudinal reinforcement cage. The second connecting seat comprises a second connecting cylinder and a second connecting ear plate, the second connecting ear plate is fixedly assembled on the outer sidewall of the second connecting cylinder, and the second connecting ear plate is hingedly connected to one end of the first reinforcing connecting rod and the second reinforcing connecting rod, and the second connecting cylinder is movably sleeved on the outer sidewall of the longitudinal reinforcement cage and can slide along the axial direction of the longitudinal reinforcement cage. The third connecting seat comprises a third connecting cylinder and a third connecting ear plate, the third connecting ear plate is fixedly assembled on the outer sidewall of the third connecting cylinder, and the third connecting ear plate is hingedly connected to one end of the first connecting rod, and the third connecting cylinder is movably sleeved on the outer sidewall of the longitudinal reinforcement cage and can slide along the axial direction of the longitudinal reinforcement cage.

[0010] Further, the support panel comprises an upper disc mouth, an upper disc surface, a lower disc surface, a lower disc mouth, a first connecting ring, a second connecting ring and a third connecting ring, the upper disc mouth is connected with the upper disc surface through the first connecting ring, the upper disc surface is connected with the lower disc surface through the second connecting ring, and the lower disc surface is connected with the lower disc mouth through the third connecting ring.

[0011] Further, the upper disc mouth, the upper disc surface, the lower disc surface, the lower disc mouth, the first connecting ring, the second connecting ring and the third connecting ring are integrally formed by using rubber material, and the upper disc mouth, the upper disc surface, the lower disc surface and the lower disc mouth are spliced to form an integrated deformable support panel structure through the first connecting ring, the second connecting ring and the third connecting ring, so that the support panel structure can realize self-adaptive mode adjustment with the expansion and contraction action of the support assembly.

[0012] Further, the upper disc mouth is fixedly connected with the top of the first connecting ear plate, the upper disc surface is fixedly assembled on the outer side wall of the second connecting rod, the lower disc surface is fixedly assembled on the outer side wall of the first connecting rod, and the inner side wall of the lower disc mouth is fixedly connected with the outer side wall of the third connecting barrel, thereby forming a lower fixed structure of the support panel.

[0013] Further, a plurality of through holes are uniformly arranged on the upper disc surface and the lower disc surface along the respective circumferences.

[0014] According to the second aspect of the present application, a construction method of an extrusion and expansion support disc device capable of guaranteeing the construction quality of a disc body is provided, and the method is implemented by using the extrusion and expansion support disc device, and comprises the following steps: S100: According to the conventional construction specification of a cast-in-place bored pile, drilling is performed to a designed pile length depth, and after drilling is completed, a hole cleaning device is used to perform special hole cleaning operation on the hole, so as to ensure that the thickness of the sediment in the hole strictly meets the requirements of the design document and the construction specification, and to provide a clean hole wall environment for subsequent extrusion and expansion operation and concrete pouring; S201: The special extrusion and expansion device is hoisted into the hole of the pile which has been cleaned by using hoisting machinery, the device bow arm is accurately controlled through a ground hydraulic control system, and the device bow arm is slowly radially opened in the hard soil layer area at the designed elevation, so as to apply extrusion force to the soil body of the hole wall, so that the soil body is compacted and a plurality of conical disc-shaped bearing disc cavities are formed, after a single support disc position is extruded and formed, the bow arm is controlled to be retracted, the extrusion and expansion device is shifted to the next designed support disc elevation, the above-mentioned extrusion and expansion operation is repeated, and until all the bearing disc cavities are completely formed; S300: After the extrusion and expansion device is taken out, the extrusion and expansion support disc device is immediately hoisted into the hole of the pile, the pull rod is pre-pressed to the lowest point before being lowered, so as to ensure that the internal reinforcement cage, the support assembly and the support panel of the device maintain a vertical concentric state, and are closely attached to the longitudinal reinforcement of the reinforcement cage, so as to avoid deviation during the lowering process, when the device is lowered to the designed elevation position, the pull rod is stretched upward through the ground traction mechanism, the support assembly is driven to radially expand the support panel, a disc body support surface which is adapted to the bearing disc cavity is formed, and stable support to the soil body of the hole wall is realized. S400: Adopting the method of pipe to carry out underwater concrete pouring operation, the concrete meeting the design strength grade is slowly injected into the pile hole through the pipe, the concrete fills the main space of the pile hole and all the cavity of the bearing plate under the action of gravity, and finally forms an integrated extruded bearing plate pile body with multiple bearing plates after the concrete hardens.

[0015] Further, the pull rod is pre-pressed to the lowest point before the extruded bearing plate device is lowered, so as to ensure that the parts of the device are vertically concentric and closely fit the longitudinal reinforcement of the reinforcement cage.

[0016] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects: 1. The extruded bearing plate device of the present application can guarantee the construction quality of the plate body, the support assembly adopts a composite hinge structure of the first connecting rod, the second connecting rod, the first reinforcing connecting rod and the second reinforcing connecting rod, and is matched with a modular connection seat of "connection cylinder + ear plate", so as to disperse the stress across the connecting rod, avoid bending deformation, and accurately and uniformly transmit force; in combination with the threaded locking design of the upper and lower fasteners, the support range can be stably fixed, the support state during concrete pouring can be ensured not to be loose, the soil pressure and the concrete lateral pressure can be effectively resisted, and the hole collapse and diameter reduction in the plate body area can be prevented.

[0017] 2. The extruded bearing plate device of the present application can guarantee the construction quality of the plate body, the upper disc mouth, the upper disc surface, the lower disc surface, the lower disc mouth, the first connecting ring, the second connecting ring and the third connecting ring are integrally formed by using rubber material. The upper disc mouth, the upper disc surface, the lower disc surface and the lower disc mouth are spliced to form an integrated deformable support panel structure through the first connecting ring, the second connecting ring and the third connecting ring, so that they can realize self-adaptive mode adjustment with the opening and closing action of the support assembly. The integrally formed rubber material structure has good flexibility and structural strength, can avoid splicing failure, can resist soil extrusion and construction wear, and prolongs the service life; the use of rubber material gives the panel good flexibility and toughness, avoids fracture caused by rigid pulling during opening and closing, and enables the panel to fit the soil profile to realize close support, improve support sealing, and reduce the risk of soil leakage.

[0018] 3. The extruded bearing plate device of the present application can guarantee the construction quality of the plate body, the through holes circumferentially formed in the upper disc surface and the lower disc surface enable the concrete to penetrate into the gap between the soil and the panel during concrete pouring, form a transition bonding layer, enhance the bonding force between the plate body concrete and the surrounding soil, and improve the pile body uplift resistance and overall bearing capacity; at the same time, the small gaps are filled to avoid non-dense concrete pouring, reduce defects such as honeycomb and hole, and guarantee the integrity of the plate body structure.

[0019] 4. The extrusion support disc device of the present application can guarantee the construction quality of the disc body, the steel reinforcement cage is bound by the longitudinal reinforcement and the hoop reinforcement to form a stable foundation, the pull rod is vertically assembled on the inside of the cage, and is accurately connected with the support assembly, only needs to drive the pull rod up and down to control the support assembly to expand and contract, and the operation is convenient; the overall structure of the device is modular, convenient to disassemble, assemble and circulate, suitable for the support disc construction of different depths and diameters, reduces the construction cost, and improves the operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 2 It is a partial enlarged view of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 3 It is a structure schematic view of the support assembly of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 4 It is a side view of the support panel of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 5 It is a bottom view of the support panel of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 6 It is a large view of the connecting seat of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 7 It is a structure view after pouring concrete of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body; Figure 8 It is a flowchart of the construction method of the extrusion support disc device of the present application which can guarantee the construction quality of the disc body.

[0021] In all the drawings, the same reference signs represent the same technical features, specifically: 1-longitudinal reinforcement of steel reinforcement cage, 2-hoop reinforcement, 3-support assembly, 301-first connecting rod, 302-second connecting rod, 303-first reinforcing connecting rod, 304-second reinforcing connecting rod, 305-first connecting seat, 3051-first connecting cylinder, 3052-first connecting ear plate, 306-second connecting seat, 3061-second connecting cylinder, 3062-second connecting ear plate, 307-third connecting seat, 3071-third connecting cylinder, 3072-third connecting ear plate, 308-transmission member, 309-upper fastener, 310-lower fastener, 4-support panel, 401-upper disc opening, 402-upper disc surface, 403-lower disc surface, 404-lower disc opening, 405-first connecting ring, 406-second connecting ring, 407-third connecting ring, 5-pull rod, 6-pile concrete, 7-disc concrete. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0023] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can implement it, and when the combination of technical solutions contradicts each other or cannot be implemented, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0025] In this patent, the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "comprise" do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0026] Embodiment 1 As Figures 1-7As shown, the embodiment of the present application provides an extrusion support disc device which can guarantee the construction quality of the disc body, comprising a reinforcement cage, a support mechanism, a support panel 4 and a pull rod 5, wherein the reinforcement cage comprises a plurality of steel reinforcement cage longitudinal bars 1 arranged in sequence along the circumference, and the reinforcement cage further comprises a plurality of hoop reinforcement bars 2 arranged in the longitudinal direction of the steel reinforcement cage longitudinal bars 1, the hoop reinforcement bars 2 are fixedly installed on the outer periphery of the steel reinforcement cage longitudinal bars 1 by binding with wire, forming a cage body with stable structure, providing a reliable installation foundation for the subsequent support structure; the pull rod 5 is arranged vertically and assembled on the inner side area of the steel reinforcement cage longitudinal bars 1, realizing coaxial arrangement with the cage body; a plurality of support mechanisms are arranged in the longitudinal direction of the outer side of the steel reinforcement cage, each of the support mechanisms comprises a plurality of support assemblies 3, the support assemblies 3 are arranged in sequence along the circumference of the steel reinforcement cage longitudinal bars 1, one end of the support assembly 3 is fixedly connected with the steel reinforcement cage longitudinal bars 1, the other end is fixedly connected with the pull rod 5, and the steel reinforcement cage longitudinal bars 1 remain in a fixed state, the pull rod 5 can move up and down relative to the steel reinforcement cage longitudinal bars 1, the outer side of the support assembly 3 is fixedly assembled with the support panel 4, the support panel 4 and the support assembly 3 form a linkage structure and can move synchronously with the support assembly 3; by driving the pull rod 5 to move up and down, the radial expansion and contraction actions of the support assembly 3 can be realized synchronously, in the process of concrete pouring operation, the support panel 4 can apply radial support force to the soil around the disc body, effectively avoiding the problems of hole collapse, diameter reduction and the like of the soil due to disturbance, ensuring the integrity of the disc pouring space, and further guaranteeing the forming quality of the disc concrete and reducing the pouring defects caused by soil collapse. The device improves the bearing stability and durability of the disc structure through mechanical support, and has simple structure and convenient operation, greatly improving the construction efficiency and engineering quality qualification rate. In the concrete construction stage, the guide pipe method is used for concrete pouring operation, the concrete falls along the guide pipe under the action of its own weight, gradually filling the main body space of the pile hole and all the disc cavities, and finally forming an integrated structure composed of the pile body concrete 6 and the disc body concrete 7, i.e. an extrusion support disc pile body with multiple support discs.

[0027] Furthermore, the support assembly 3 includes a first connecting rod 301, a second connecting rod 302, a first connecting seat 305, a third connecting seat 307, a transmission component 308, an upper fastener 309, and a lower fastener 310. The first connecting seat 305 is fixedly sleeved on the outer wall of the longitudinal reinforcement 1 of the reinforcing cage, forming a stable fixed hinge fulcrum. The third connecting seat 307 is movably sleeved on the outer wall of the longitudinal reinforcement 1 of the reinforcing cage and is arranged below the first connecting seat 305 along the axial direction of the longitudinal reinforcement 1 of the reinforcing cage, allowing it to slide flexibly along the axial direction of the longitudinal reinforcement 1 of the reinforcing cage, providing a guiding foundation for the extension and retraction of the linkage mechanism. The first connecting seat 305 is hinged to one end of the second connecting rod 302, the other end of the second connecting rod 302 is hinged to one end of the first connecting rod 301, and the other end of the first connecting rod 301 is hinged to the third connecting seat 307, forming a foldable linkage mechanism with precise transmission. This structure, through the multi-link hinged cooperation, achieves uniform transmission of support force and avoids local stress concentration. The inner side of the third connecting seat 307 is fixedly connected to the transmission component 308. The transmission component 308 is movably sleeved on the outer side wall of the pull rod 5, ensuring that the transmission component 308 moves axially synchronously with the pull rod 5. The upper end of the transmission component 308 is equipped with an upper fastener 309, and the lower end is equipped with a lower fastener 310. Both the upper fastener 309 and the lower fastener 310 are screwed into the pull rod 5 through a threaded structure. By tightening or loosening the upper fastener 309 and the lower fastener 310, the axial position of the transmission component 308 on the pull rod 5 can be quickly locked. By pulling the pull rod 5 up and down, the support assembly 3 can be opened and folded.

[0028] Furthermore, the support assembly 3 also includes a first reinforcing link 303, a second reinforcing link 304, and a second connecting seat 306. The second connecting seat 306 is movably sleeved on the outer wall of the longitudinal reinforcement 1 of the reinforcing cage, and is arranged axially between the first connecting seat 305 and the third connecting seat 307 along the longitudinal reinforcement 1 of the reinforcing cage, and can slide axially along the longitudinal reinforcement 1 of the reinforcing cage. One end of the first reinforcing link 303 and the second reinforcing link 304 are hinged to the second connecting seat 306. The other end of the first reinforcing link 303 is hinged to the middle region of the second link 302, and the other end of the second reinforcing link 304 is hinged to the middle region of the first link 301. Together with the first link 301 and the second link 302, they form a composite support mechanism with multi-node coordinated force bearing. By setting the second connecting seat 306 on the longitudinal reinforcement 1 of the steel cage, and forming a central support with the first reinforcing link 303 and the second reinforcing link 304, the mid-span stress of the first link 301 and the second link 302 can be significantly dispersed, avoiding bending, deformation or even breakage of the link due to concentrated force, and greatly improving the structural strength and bearing stability of the support component 3. At the same time, it makes the opening and closing action of the support panel 4 more stable and synchronous, ensuring that the support force is evenly applied to the soil around the panel, effectively avoiding the risk of hole collapse caused by local support failure.

[0029] Further, the first connecting seat 305 comprises a first connecting barrel 3051 and a first connecting lug plate 3052, the first connecting lug plate 3052 is fixedly assembled on the outer side wall of the first connecting barrel 3051, and the first connecting lug plate 3052 is hinged to one end of the second connecting rod 302, the first connecting barrel 3051 is fixedly sleeved on the outer side wall of the longitudinal reinforcement 1, forming a rigid fixed fulcrum, ensuring no displacement deviation when the hinge is stressed, and ensuring the stability of force transmission; the second connecting seat 306 comprises a second connecting barrel 3061 and a second connecting lug plate 3062, the second connecting lug plate 3062 is fixedly assembled on the outer side wall of the second connecting barrel 3061, and the second connecting lug plate 3062 is hinged to one end of the first reinforcing connecting rod 303 and the second reinforcing connecting rod 304, the second connecting barrel 3061 is movably sleeved on the outer side wall of the longitudinal reinforcement 1, and can flexibly slide along the axial direction of the longitudinal reinforcement 1, providing accurate guidance for the linkage movement of the reinforcing connecting rod and avoiding movement jamming; the third connecting seat 307 comprises a third connecting barrel 3071 and a third connecting lug plate 3072, the third connecting lug plate 3072 is fixedly assembled on the outer side wall of the third connecting barrel 3071, and the third connecting lug plate 3072 is hinged to one end of the first connecting rod 301, the third connecting barrel 3071 is movably sleeved on the outer side wall of the longitudinal reinforcement 1, and can flexibly slide along the axial direction of the longitudinal reinforcement 1, ensuring the smoothness of the expansion and contraction action of the supporting assembly 3. Through the modular structure of "connecting barrel + lug plate", the assembly mode (fixed / movable) of each connecting seat and the longitudinal reinforcement 1 of the reinforcing cage can accurately match the functional requirements, which not only ensures the rigidity of the fixed fulcrum, but also realizes the flexible movement of the movable part. At the same time, the sleeving cooperation of the connecting barrel and the longitudinal reinforcement 1 of the reinforcing cage improves the assembly coaxiality, the hinge of the lug plate and the connecting rod reduces the transmission resistance, the overall structure has high strength and convenient assembly, can effectively avoid the problem of unstable support caused by connection failure, prolong the service life of the device, and ensure the construction quality of the disc body.

[0030] Further, the support panel 4 comprises an upper disc mouth 401, an upper disc surface 402, a lower disc surface 403, a lower disc mouth 404, a first connecting ring 405, a second connecting ring 406, and a third connecting ring 407. The upper disc mouth 401, the lower disc mouth 404, the first connecting ring 405, the second connecting ring 406, and the third connecting ring 407 are all annular structures. The upper disc surface 402 and the lower disc surface 403 are both conical surface structures. The support panel 4 is fixedly assembled to the outer side of the support assembly 3 and forms a synchronous linkage structure with the support assembly 3. The upper disc mouth 401 is connected with the upper disc surface 402 through the first connecting ring 405. The upper disc surface 402 is connected with the lower disc surface 403 through the second connecting ring 406. The lower disc surface 403 is connected with the lower disc mouth 404 through the third connecting ring 407. The upper disc mouth 401, the upper disc surface 402, the lower disc surface 403, the lower disc mouth 404, the first connecting ring 405, the second connecting ring 406, and the third connecting ring 407 are all integrally formed by using rubber material. The upper disc mouth 401, the upper disc surface 402, the lower disc surface 403, and the lower disc mouth 404 are spliced to form an integrated deformable support panel structure through the first connecting ring 405, the second connecting ring 406, and the third connecting ring 407, so that the integrated deformable support panel structure can realize adaptive mode adjustment with the opening and closing actions of the support assembly 3. The integrally formed rubber material structure has good flexibility and structural strength, can avoid fracture failure at the spliced part, can resist soil extrusion and construction wear, and prolongs the service life. The use of rubber material gives the panel good flexibility and toughness, avoids fracture caused by rigid pulling during the opening and closing process, and enables the panel to fit the soil profile to realize close support, improve support sealing, and reduce the risk of soil leakage. The integrated deformable structure not only ensures uniform transmission of support force, but also adapts to different opening amplitudes of construction requirements, further strengthens the stable support effect on the soil around the disc body, and ensures the concrete pouring quality.

[0031] Further, the upper disc surface 402 and the lower disc surface 403 are uniformly provided with a plurality of through holes along the respective circumferences. The through holes are concrete permeation channels. When concrete pouring is performed, part of the concrete can penetrate into the gap area between the soil and the support panel 4 through the through holes, realize the penetration and combination of the concrete and the surrounding soil, form a transition combined layer, enhance the interfacial adhesion between the disc body and the soil, improve the overall bearing capacity and anti-pulling performance of the disc body, fill the small gaps between the support panel and the soil, avoid the existence of gaps leading to non-dense pouring of the disc body concrete, reduce quality defects such as honeycomb and hole, and further ensure the integrity and durability of the disc body structure.

[0032] Furthermore, the upper flange 401 is fixedly connected to the top of the first connecting ear plate 3052 to form the upper fixed fulcrum of the support panel 4. The upper disc surface 402 is fixedly assembled to the outer side wall of the second connecting rod 302, and the lower disc surface 403 is fixedly assembled to the outer side wall of the first connecting rod 301, realizing the rigid linkage between the support panel and the support assembly 3. The inner side wall of the lower flange 404 is fixedly connected to the outer side wall of the third connecting cylinder 3071 to form the lower fixed structure of the support panel 4, so that the components of the support panel 4 are precisely aligned and firmly connected to the core transmission structure of the support assembly 3, ensuring that when the support assembly 3 is opened and closed, the upper flange 401, the upper disc surface 402, the lower disc surface 403 and the lower flange 404 can move synchronously, avoiding panel deformation or connection failure caused by relative displacement. Meanwhile, the rigid connection method ensures the efficient transmission of support force from the linkage mechanism to the panel, enabling the support panel 4 to apply a uniform and stable support force to the soil, enhancing the reliability of the support. The synchronous linkage characteristic ensures that the expansion amplitude of each part of the panel is consistent, conforming to the contour of the soil to form a regular pouring space, providing a solid guarantee for the molding accuracy and structural integrity of the concrete.

[0033] Example 2 Combination Figures 1-7 ,like Figure 8 As shown, this invention provides an installation method for an extrusion expansion support device that can ensure the construction quality of the extrusion plate. The method utilizes the aforementioned extrusion expansion support device, and the specific steps are as follows: S100: Drill the hole to the designed pile length depth in accordance with the conventional construction specifications for bored piles. After drilling is completed, use a hole cleaning equipment to carry out a special hole cleaning operation to ensure that the thickness of sediment in the hole strictly meets the requirements of the design documents and construction specifications, so as to provide a clean hole wall environment for subsequent expansion operations and concrete pouring. S201: The special extrusion expansion equipment is hoisted into the cleaned pile hole by a crane. The equipment boom is precisely controlled by the ground hydraulic control system. It slowly expands radially in the hard soil layer area at the design elevation, applying extrusion pressure to the soil wall to make the soil compact and form multiple conical bearing plate cavities. After the single bearing plate position is extruded and formed, the boom is controlled to retract and the extrusion expansion equipment is moved to the next design bearing plate elevation. The above extrusion expansion operation is repeated until all bearing plate cavities are formed. S300: After removing the expansion device, immediately hoist the expansion support plate device into the pile hole. Before lowering, pre-press the tie rod 5 to the lowest point to ensure that the steel cage, support component 3 and support panel 4 inside the device remain vertically concentric and are tightly attached to the longitudinal reinforcement 1 of the steel cage to avoid displacement during the lowering process. After the device is lowered to the design elevation, the tie rod 5 is pulled upward by the ground traction mechanism to drive the support component 3 to radially expand the support panel 4, forming a plate support surface that matches the cavity of the bearing plate, thereby achieving stable support for the soil of the hole wall. S400: Underwater concrete pouring is carried out using the tremie pipe method. Concrete that meets the design strength grade is slowly injected into the pile hole through the tremie pipe. Under its own weight, the concrete fills the main space of the pile hole and all the cavities of the bearing plate. After the concrete has finally set and hardened, an integrated extrusion-expanded support plate pile with multiple bearing plates is finally formed.

[0034] Furthermore, before lowering the expansion support plate device, the tie rod 5 is pre-pressed to the lowest point to ensure that all components of the device are vertically concentric and tightly fitted with the longitudinal reinforcement 1 of the steel cage.

[0035] This construction method, through its "expansion-cavity formation-device support-precision pouring" process design, effectively solves the pain points of cavity collapse and insufficient concrete compaction in traditional construction. The supporting device ensures the dimensional accuracy of the cavity, allowing the concrete to be fully filled and formed, significantly improving the bearing capacity of the bearing plate and the overall stability of the pile. At the same time, the construction process is compact, convenient, and efficient, which can greatly improve the pass rate of construction quality and work efficiency.

[0036] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for expanding and distributing a support disc that ensures the quality of disc construction, characterized in that, Includes a steel cage, a support mechanism, a support panel (4), and tie rods (5); among which, The steel cage includes multiple longitudinal steel bars (1) arranged sequentially along the circumference, and the longitudinal steel bars (1) are provided with multiple circumferential stirrups (2) at intervals in the longitudinal direction to form a structurally stable cage. The tie rod (5) is vertically arranged and assembled in the inner area of ​​the longitudinal reinforcement (1) of the steel cage. Multiple support mechanisms are arranged at intervals along the longitudinal direction of the outer side of the steel cage. Each support mechanism includes multiple support components (3). The support components (3) are arranged sequentially along the circumference of the longitudinal reinforcement (1) of the steel cage. One end of the support component (3) is fixedly connected to the longitudinal reinforcement (1) of the steel cage, and the other end is fixedly connected to the tie rod (5). The longitudinal reinforcement (1) of the steel cage remains fixed. The tie rod (5) can move up and down relative to the longitudinal reinforcement (1) of the steel cage. The support panel (4) is fixedly mounted on the outside of the support component (3). The support panel (4) and the support component (3) form a linkage structure and can move synchronously with the support component (3). By driving the tie rod (5) to move up and down, the radial expansion and contraction of the support component (3) can be realized synchronously. During the concrete pouring operation, the support panel (4) can apply radial support force to the soil around the plate, effectively avoiding the problem of soil collapse and shrinkage due to disturbance, and ensuring the integrity of the plate pouring space.

2. The extrusion expansion support device for ensuring the construction quality of the disc body according to claim 1, characterized in that, The support assembly (3) includes a first connecting rod (301), a second connecting rod (302), a first connecting seat (305), a third connecting seat (307), a transmission component (308), an upper fastener (309), and a lower fastener (310). The first connecting seat (305) is fixedly sleeved on the outer wall of the longitudinal reinforcement (1) of the steel cage. The third connecting seat (307) is movably sleeved on the outer wall of the longitudinal reinforcement (1) of the steel cage and is arranged below the first connecting seat (305) along the axial direction of the longitudinal reinforcement (1) of the steel cage, and can slide flexibly along the axial direction of the longitudinal reinforcement (1). The first link (301) is hinged to one end of the second link (302), and the other end of the second link (302) is hinged to one end of the first link (301). The other end of the first link (301) is hinged to the third connecting seat (307). The inner side of the third connecting seat (307) is fixedly connected to the transmission component (308). The transmission component (308) is movably sleeved on the outer side wall of the pull rod (5). The upper end of the transmission component (308) is equipped with an upper fastener (309), and the lower end is equipped with a lower fastener (310). Both the upper fastener (309) and the lower fastener (310) are threadedly connected to the pull rod (5).

3. The extrusion expansion support device for ensuring the construction quality of the disc body according to claim 2, characterized in that, The support assembly (3) further includes a first reinforcing link (303), a second reinforcing link (304) and a second connecting seat (306). The second connecting seat (306) is movably sleeved on the outer wall of the longitudinal reinforcement (1) of the steel cage and is arranged between the first connecting seat (305) and the third connecting seat (307) along the axial direction of the longitudinal reinforcement (1) of the steel cage, and can slide along the axial direction of the longitudinal reinforcement (1) of the steel cage. One end of the first reinforcing link (303) and the second reinforcing link (304) are hinged to the second connecting seat (306). The other end of the first reinforcing link (303) is hinged to the middle region of the second link (302), and the other end of the second reinforcing link (304) is hinged to the middle region of the first link (301). Together with the first link (301) and the second link (302), they form a composite support mechanism with multi-node coordinated force.

4. The extrusion expansion support device for ensuring the construction quality of the disc body according to claim 3, characterized in that, The first connecting seat (305) includes a first connecting cylinder (3051) and a first connecting ear plate (3052). The first connecting ear plate (3052) is fixedly assembled on the outer side wall of the first connecting cylinder (3051), and the first connecting ear plate (3052) is hinged to one end of the second connecting rod (302). The first connecting cylinder (3051) is fixedly sleeved on the outer side wall of the longitudinal reinforcement (1) of the steel cage. The second connecting seat (306) includes a second connecting cylinder (3061) and a second connecting ear plate (3062). The second connecting ear plate (3062) is fixedly assembled on the outer side wall of the second connecting cylinder (3061), and the second connecting ear plate (3062) is hinged to one end of the first reinforcing rod (303) and the second reinforcing rod (304). The second connecting cylinder (3061) is movably sleeved on the outer side wall of the longitudinal reinforcement (1) of the steel cage, and can slide flexibly along the axial direction of the longitudinal reinforcement (1) of the steel cage. The third connecting seat (307) includes a third connecting cylinder (3071) and a third connecting ear plate (3072). The third connecting ear plate (3072) is fixedly assembled on the outer side wall of the third connecting cylinder (3071), and the third connecting ear plate (3072) is hinged to one end of the first connecting rod (301). The third connecting cylinder (3071) is movably sleeved on the outer side wall of the longitudinal reinforcement (1) of the steel cage, and can slide flexibly along the axial direction of the longitudinal reinforcement (1) of the steel cage.

5. The extrusion expansion support device according to claim 1, characterized in that, The support panel (4) includes an upper opening (401), an upper plate surface (402), a lower plate surface (403), a lower opening (404), a first connecting ring (405), a second connecting ring (406), and a third connecting ring (407). The upper opening (401) is connected to the upper plate surface (402) through the first connecting ring (405). The upper plate surface (402) is connected to the lower plate surface (403) through the second connecting ring (406). The lower plate surface (403) is connected to the lower opening (404) through the third connecting ring (407).

6. The extrusion expansion support device according to claim 5, characterized in that, The upper plate opening (401), upper plate surface (402), lower plate surface (403), lower plate opening (404), first connecting ring (405), second connecting ring (406) and third connecting ring (407) are all integrally formed of rubber material. The upper plate opening (401), upper plate surface (402), lower plate surface (403) and lower plate opening (404) are spliced ​​together by the first connecting ring (405), second connecting ring (406) and third connecting ring (407) to form an integrated deformable support panel structure, so that it can achieve adaptive shape adjustment with the opening and closing action of the support component (3).

7. The extrusion expansion support device according to claim 6, characterized in that, The upper plate (401) is fixedly connected to the top of the first connecting ear plate (3052), the upper plate surface (402) is fixedly assembled to the outer side wall of the second connecting rod (302), the lower plate surface (403) is fixedly assembled to the outer side wall of the first connecting rod (301), and the inner side wall of the lower plate (404) is fixedly connected to the outer side wall of the third connecting cylinder (3071), forming the lower fixed structure of the support panel (4).

8. The extrusion expansion support device according to claim 7, characterized in that, The upper plate (402) and the lower plate (403) are each provided with a plurality of through holes evenly distributed along their respective circumferences.

9. A construction method for an extrusion and expansion support device that can ensure the construction quality of the disc body, characterized in that, The method employs a disc expansion support device as described in any one of claims 1-8, which ensures the construction quality of the disc body, characterized by comprising the following steps: S100: Drill the hole to the designed pile length depth in accordance with the conventional construction specifications for bored piles. After drilling is completed, use a hole cleaning equipment to carry out a special hole cleaning operation to ensure that the thickness of sediment in the hole strictly meets the requirements of the design documents and construction specifications, so as to provide a clean hole wall environment for subsequent expansion operations and concrete pouring. S201: The special extrusion expansion equipment is hoisted into the cleaned pile hole by a crane. The equipment boom is precisely controlled by the ground hydraulic control system. It slowly expands radially in the hard soil layer area at the design elevation, applying extrusion pressure to the soil wall to make the soil compact and form multiple conical bearing plate cavities. After the single bearing plate position is extruded and formed, the boom is controlled to retract and the extrusion expansion equipment is moved to the next design bearing plate elevation. The above extrusion expansion operation is repeated until all bearing plate cavities are formed. S300: After taking out the expansion device, immediately hoist the expansion support plate device into the pile hole. Before lowering, pre-press the tie rod (5) to the lowest point to ensure that the steel cage, support component (3) and support panel (4) inside the device remain vertically concentric and closely fit with the longitudinal reinforcement (1) of the steel cage to avoid deviation during the lowering process. When the device is lowered to the design elevation position, pull the tie rod (5) upward through the ground traction mechanism to drive the support component (3) to radially expand the support panel (4) to form a plate support surface that is compatible with the cavity of the bearing plate, so as to achieve stable support for the soil of the hole wall. S400: Underwater concrete pouring is carried out using the tremie pipe method. Concrete that meets the design strength grade is slowly injected into the pile hole through the tremie pipe. Under its own weight, the concrete fills the main space of the pile hole and all the cavities of the bearing plate. After the concrete has finally set and hardened, an integrated extrusion-expanded support plate pile with multiple bearing plates is finally formed.

10. A construction method for an extrusion and expansion support device that can ensure the construction quality of the disc body according to claim 9, characterized in that, Before lowering the expansion support plate device, pre-press the tie rod (5) to the lowest point to ensure that all parts of the device are vertically concentric and closely fit with the longitudinal reinforcement (1) of the steel cage.

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