Reinforcing structure of composite foundation and construction method of reinforcing structure

Abstract

The invention relates to a reinforcing structure of a composite foundation and a construction method thereof, and belongs to the technical field of foundation reinforcement. The reinforcing structure of the composite foundation comprises a plurality of prefabricated reinforcing piles and a connecting plate, the connecting plate is used for connecting the prefabricated reinforcing piles, the prefabricated reinforcing piles are provided with reinforcing assemblies at intervals along the axis, and the tops of the prefabricated reinforcing piles are provided with driving assemblies for driving the reinforcing assemblies to slide or rotate; the reinforcing assembly comprises a reinforcing box body and is provided with a matched transmission part matched with the second driving part; the reinforcing box body slides out of the embedded reinforcing column through the first driving part, and then rotation of the reinforcing box body is achieved through the second driving part. The effect of improving the stability and the bearing capacity of the composite foundation is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of foundation reinforcement, and in particular to a composite foundation reinforcement structure and a construction method thereof. Background Art

[0002] Composite foundation refers to an artificial foundation in which part of the soil of the natural foundation is strengthened or replaced during the foundation treatment process, or reinforcement and reinforcement bodies are set in the natural foundation. The composite foundation is jointly borne by the base and reinforcement bodies.

[0003] At present, pile foundation reinforcement method is used to reinforce natural soft foundation with thick soil layer and high water content. Conventional pile foundation reinforcement method uses reinforced concrete piles, cast-in-place piles, precast piles, etc., and evenly distributes the above reinforcement piles in the foundation. The bearing function is realized only by the contact of soil with the reinforcement piles. However, the friction force of soft soil foundation on the outer wall of reinforcement pile is limited. At the same time, the strength of different positions of soft soil foundation is different, resulting in uneven settlement of multiple reinforcement piles, so that the bearing capacity and stability of reinforcement piles need to be improved. Summary of the invention

[0004] In order to improve the bearing capacity and stability of the reinforcement piles, the present application provides a reinforcement structure of a composite foundation and a construction method thereof.

[0005] In the first aspect, the present application provides a composite foundation reinforcement structure adopting the following technical solution: A reinforcement structure for a composite foundation, comprising a plurality of prefabricated reinforcement piles inserted into the foundation and a connecting plate disposed on the top of the prefabricated reinforcement piles, the connecting plate being used to connect the plurality of prefabricated reinforcement piles, the prefabricated reinforcement piles being provided with reinforcement components spaced apart along an axis, and a driving component for driving the reinforcement components to slide or rotate being disposed on the top; The reinforcement assembly comprises a reinforcement box, wherein the reinforcement box has a containing chamber, the containing chamber is filled with a reinforcing agent for reacting with a medium to solidify, and the containing chamber is provided with a flow hole connecting the inner and outer chambers and a sealing film sealing the flow hole; The driving assembly includes a sliding column vertically slidingly arranged in the prefabricated reinforcement pile, a first driving member arranged at intervals along the axis of the sliding column, and a second driving member staggered with the first driving member, the first driving member is used to drive the reinforcement box to move in a direction away from the axis of the prefabricated reinforcement column, the second driving member is used to drive the reinforcement box to rotate, and the reinforcement assembly has a matching transmission member adapted to the second driving member; when the reinforcement box slides out of the embedded reinforcement column, the reinforcement box is driven to rotate by the driving assembly.

[0006] By adopting the above technical solution, the prefabricated reinforcement piles are inserted into the foundation using the above reinforcement structure, and a plurality of prefabricated reinforcement piles are connected to each other through connecting plates to form a whole, thereby improving the stability of the reinforcement piles; after the prefabricated reinforcement piles are inserted into the foundation, the reinforcement box located in the prefabricated reinforcement piles is first driven horizontally by the first driving member, and the reinforcement box is inserted into the foundation along the radial direction of the prefabricated reinforcement piles, and then the reinforcement box is driven circumferentially by the second driving member, so that the reinforcing agent in the reinforcement box and the moisture in the soft soil foundation can fully react, thereby improving the connection strength between the prefabricated reinforcement piles and the foundation, and improving the bearing capacity.

[0007] Optionally, the connecting plate member includes a first plate body and a second plate body mounted on the first plate body, one side of the first plate body has a mounting groove, the second plate body has a mounting plate adapted to the mounting groove, and the mounting plate and the mounting groove are coaxially provided with a first through hole for inserting the prefabricated reinforcement pile.

[0008] By adopting the above technical scheme, the structure of the connecting plate is disclosed. The prefabricated reinforcement piles are placed before insertion, and the first penetration holes formed after the connecting plate is fixed to the foundation surface play a positioning effect for the installation of the prefabricated reinforcement piles. At the same time, the connection strength between the two plates is increased, thereby improving the overall structural strength of the reinforced structure.

[0009] Optionally, the first plate body has a plurality of erection sinking grooves, the second plate body has the erection plates matching the number of the erection sinking grooves, the first plate body and the second plate body are further provided with second penetration holes for inserting the prefabricated reinforcement piles, and the second penetration holes are arranged alternately with the erection sinking grooves; The connecting plate is also provided with a connecting piece for connecting the prefabricated reinforcement pile in the first penetration hole and the prefabricated reinforcement pile in the second penetration hole, the connecting piece includes a connecting ring fixed on the top of the prefabricated fixing pile, a connecting rod inserted into the connecting ring and a locking pin, and a plurality of connecting slots for inserting the connecting rod are circumferentially spaced apart on the connecting ring.

[0010] By adopting the above technical solution, the setting of the second through hole further improves the structural strength of the reinforced structure at the end face of the connecting plate; the setting of the connecting piece can connect and fix adjacent prefabricated reinforcement piles, reducing the probability of uneven settlement.

[0011] Optionally, the reinforcement assembly includes a push rod abutting against the reinforcement box, a sliding sleeve rotatably mounted on the prefabricated reinforcement pile and sleeved on the push rod, and an elastic plunger member arranged on the outer wall of the push rod and used to radially fix the sliding sleeve; The end of the reinforcement sliding sleeve is provided with a first sliding portion, and the first sliding portion is axially slidably installed on the reinforcement box body, and the matching transmission member is fixed to the end of the sliding sleeve rod away from the first sliding portion. The inner side of the sliding sleeve rod is provided with a limiting groove and an annular groove for the elastic plunger member to slide, and the limiting groove and the annular groove are connected. When the reinforcement box body slides out to the prefabricated reinforcement pile, the elastic plunger member is separated from the limiting groove and slides to the annular groove.

[0012] By adopting the above technical scheme, the structural composition of the reinforcement assembly is further disclosed. The push rod and the sliding sleeve are fixedly connected by an elastic plunger before the prefabricated reinforcement pile is inserted into the foundation. When the prefabricated reinforcement pile is inserted into the first penetration hole and the second penetration hole, the sliding column is moved vertically, and the push rod is driven to slide horizontally through the first driving member until the elastic plunger disengages from the limiting groove and moves to the annular groove, thereby releasing the lock of the push rod and the sliding sleeve. At this time, the sliding sleeve can rotate relative to the push rod.

[0013] Optionally, the first driving member is fixedly connected to the sliding column, the end of the push rod is provided with a first inclined surface, and the end of the push rod has a second inclined surface that cooperates and abuts with the first inclined surface, and when the sliding rod moves toward the bottom of the prefabricated reinforcement pile, the first driving member drives the push rod to move in a direction away from the axis of the prefabricated reinforcement pile.

[0014] By adopting the above technical solution, the matching mode of the first driving member and the reinforcement assembly is specifically disclosed. When the sliding column moves vertically downward, the first inclined surface of the first driving member abuts against the second inclined surface at the end of the pushing rod, so that the pushing rod starts to move radially in the horizontal direction. The matching mode of the above first driving member and the pushing rod is simple and easy to operate.

[0015] Optionally, the second driving member is a first bevel gear fixed to the pushing rod, the mating transmission member is a second bevel gear, a fixing member for inserting and fixing the sliding column is provided at the bottom of the inner cavity of the prefabricated reinforcement pile, the fixing member is rotationally matched with the prefabricated reinforcement pile, and when the elastic plunger moves to the annular groove, the sliding column is inserted into the fixing member.

[0016] By adopting the above technical scheme, the cooperation mode of the second driving member and the cooperating transmission member is specifically disclosed. When the reinforcement box pushes out the prefabricated reinforcement pile, the elastic plunger moves to the annular groove to release the radial locking of the push rod and the sliding sleeve. At this time, when the second driving member drives the sliding sleeve to rotate, it will not drive the push rod to rotate synchronously, thereby ensuring that the first driving member is always in a cooperative state with the push rod. The setting of the fixing member can make the rotation of the sliding column smoother and improve the stability of the sliding column.

[0017] Optionally, the prefabricated reinforcement pile has a through hole for the reinforcement box to be slidably inserted into the foundation, and the inner wall of the through hole is provided with a cutting piece for abutting the sealing film.

[0018] By adopting the above technical solution and setting the cutting blade, after the reinforcement box slides out of the prefabricated reinforcement pile, the cutting blade tears the sealing film of the reinforcement box, allowing the curing agent in the reinforcement box to flow out to the outside and be evenly mixed with the foundation under the action of rotation. The moisture in the foundation and the curing agent are combined to mix the curing agent and the foundation soil and solidify, thereby improving the connection strength between the prefabricated reinforcement pile and the foundation.

[0019] Optionally, one end of the reinforcement box away from the axis of the prefabricated reinforcement pile has a pointed portion.

[0020] By adopting the above technical solution, when the driving component moves the reinforcement box horizontally, the side of the reinforcement box facing the foundation is configured to be pointed, which can facilitate the reinforcement box to be inserted into the foundation compared to the flat end.

[0021] In a second aspect, a construction method of a composite foundation reinforcement structure is applied to the above-mentioned composite foundation reinforcement structure, comprising the following steps: S1, cleaning the roadbed surface and opening a foundation pit on the roadbed surface; S2, setting a connecting plate at the foundation pit, and casting and fixing the edge of the connecting plate and the inner wall of the foundation pit; S3, drilling holes at the first through hole and the second through hole on the connecting plate to form foundation pile holes; S4, inserting the prefabricated reinforcement pile into the first penetration hole and the second penetration hole; S5, using the driving assembly to vertically move the sliding column, and through the cooperation of the first driving member and the abutting column, the reinforcement box slides horizontally out of the prefabricated reinforcement pile and is inserted into the foundation, and the sealing film of the reinforcement box is broken under the action of the cutting blade, so that the reinforcement agent in the reinforcement box flows out; S6, driving the pump body to transport water along the connecting pipe to the reinforcement box body, and then starting the driving assembly again, and driving the reinforcement box body and the sliding sleeve rod to rotate synchronously through the cooperation of the second driving member and the matching transmission member, so that the reinforcement agent flows evenly to the outer peripheral side of the reinforcement box body; S7, injecting grout into the prefabricated reinforcement piles, and after the prefabricated reinforcement piles are formed, fixing adjacent prefabricated reinforcement piles by connecting pieces.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the prefabricated reinforcement pile of the present application is inserted into the foundation, the prefabricated reinforcement box is driven by the first driving member to horizontally pass through the prefabricated reinforcement pile, and then the reinforcement box is driven by the second driving member to rotate, so that the curing agent in the reinforcement box and the foundation soil are mixed and stirred, thereby increasing the connection strength between the prefabricated reinforcement pile and the foundation; 2. The present application connects a plurality of prefabricated reinforcement piles by setting a connecting plate, thereby improving the stability of the prefabricated reinforcement piles and reducing the probability of uneven settlement; 3. The sliding sleeve of the present application is connected to the prefabricated reinforcement pile through the sliding cooperation between the first sliding part and the reinforcement box. When the reinforcement box slides out horizontally, the sliding sleeve is in a relatively static state. After the elastic plunger moves to the annular groove, the driving sliding sleeve can synchronously drive the reinforcement box to rotate, and the push rod is always in a state of abutting against the reinforcement box, which is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is an exploded schematic diagram of the connecting plate of an embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the overall cross-section of the prefabricated reinforcement piles of the embodiment of the present application.

[0026] Figure 4 It is a cross-sectional schematic diagram of the reinforcement box of the embodiment of the present application sliding out of the prefabricated reinforcement piles.

[0027] Figure 5 It is an exploded schematic diagram of the reinforcement component of an embodiment of the present application.

[0028] Figure 6 yes Figure 4 A local enlarged schematic diagram of point A in the middle.

[0029] Figure 7 It is a cross-sectional schematic diagram of the reinforcement box according to the embodiment of the present application without sliding out of the prefabricated reinforcement piles.

[0030] Figure 8 It is a schematic diagram of the structure of the cutting blade and the reinforcement box according to the embodiment of the present application.

[0031] Description of reference numerals: 1. Prefabricated reinforcement pile; 11. Positioning slot; 12. Through hole; 14. Fixing piece; 15. Cutting blade; 2. Connecting plate; 21. First plate; 211. Erection sink groove; 212. First through hole; 213. Second through hole; 22. Second plate; 221. Erection plate; 23. Connecting piece; 231. Connecting ring; 2311. Connecting slot; 232. Connecting rod; 233. Locking pin; 3. Reinforcement assembly; 31. Reinforcement box; 311. Accommodating chamber; 312, flow hole; 313, sealing film; 314, axial groove; 315, limiting sliding groove; 32, pushing rod; 321, second inclined surface; 33, sliding sleeve rod; 331, first sliding part; 3311, first section; 3312, second section; 332, limiting groove; 333, annular groove; 34, elastic plunger; 341, guide surface; 35, matching transmission member; 4, driving assembly; 41, sliding column; 42, first driving member; 421, first inclined surface; 43, second driving member. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0033] The following is combined with Figure 1-8 This application is described in further detail.

[0034] The embodiments of the present application disclose a composite foundation reinforcement structure and a construction method thereof.

[0035] Reference Figure 1 A composite foundation reinforcement structure includes a plurality of prefabricated reinforcement piles 1 inserted into the foundation and a connecting plate 2 located on the top of the prefabricated reinforcement piles 1. Before construction, a foundation pit for arranging the connecting plate 2 is dug on the surface of the foundation to be reinforced, and the depth of the foundation pit is adapted to the thickness of the connecting plate 2.

[0036] Reference Figure 1 and Figure 2 The connecting plate 2 includes a first plate body 21 and a second plate body 22 mounted on the first plate body 21. Both the first plate body 21 and the second plate body 22 are rectangular plates. The side of the first plate body 21 has a mounting sink 211, and the mounting sink 211 is evenly spaced along the side. Among them, the first plate body 21 close to the side wall of the foundation pit has the mounting sink 211 only on one side, and the first plate body 21 located in the middle area of ​​the foundation pit has the mounting sink 211 on both opposite sides. The second plate body 22 has mounting plates 221 adapted to the mounting sink 211 on both opposite sides.

[0037] The bottom wall of the erection plate 221 and the erection trough 211 is coaxially provided with a first through hole 212 penetrating through the two side end faces, and the prefabricated reinforcement pile 1 is inserted into the foundation through the first through hole 212. In order to further improve the structural strength of the reinforced structure of the present application, the first plate body 21 and the second plate body 22 are also provided with a second through hole 213 for inserting the prefabricated reinforcement pile 1. The second through hole 213 and the first through hole 212 are arranged alternately and spaced apart, and are closer to the middle of the plate body than the first through hole 212.

[0038] A connecting piece 23 for connecting two adjacent prefabricated reinforcement piles 1 is installed on the connecting plate 2. The two adjacent prefabricated reinforcement piles 1 are prefabricated reinforcement piles 1 located at the first penetration hole 212 and the second penetration hole 213, respectively. After the connecting piece 23 is fixed, the four prefabricated reinforcement piles 1 become a combined unit. The connecting piece 23 includes a connecting ring 231, a connecting rod 232 and a locking pin 233. The connecting ring 231 is fixedly inserted into the top of the prefabricated reinforcement pile 1, and the circumferential side of the connecting ring 231 is evenly spaced with connecting slots 2311 for inserting the ends of the connecting rod 232. The two ends of the connecting rod 232 are respectively inserted into the connecting slots 2311 of the two adjacent connecting rings 231, and then fixed by the locking pin 233. The locking pin 233 is used to lock the connecting ring 231 and the prefabricated reinforcement pile 1, wherein a part of the locking pin 233 passes through the connecting rod 232 and the connecting ring 231 in sequence, and is finally inserted into the prefabricated reinforcement pile 1, and another part of the locking pin 233 is directly inserted into the connecting slot 2311 and passes through the connecting ring 231 to the prefabricated reinforcement pile 1.

[0039] The arrangement of the connecting plate 2 and the connecting member 23 facilitates the positioning and insertion of the prefabricated reinforcement pile 1, and at the same time, multiple prefabricated reinforcement piles 1 and the connecting plate 2 are connected as a whole, ensuring that the connecting plate 2 is not prone to uneven settlement.

[0040] Reference Figure 3 and Figure 4 The prefabricated reinforcement pile 1 is a hollow cylindrical steel pipe, and the top thereof has a positioning slot 11 for inserting the connecting ring 231. After the connecting ring 231 is inserted into the positioning slot 11, the connecting ring 231 and the connecting plate 2 are fixed by grouting.

[0041] A plurality of reinforcement components 3 and a driving component 4 for driving the reinforcement components 3 to slide or rotate are evenly arranged on the prefabricated reinforcement pile 1 along the axial direction. The reinforcement component 3 includes a reinforcement box 31, a push rod 32 abutting against the reinforcement box 31, a sliding sleeve rod 33 rotatably mounted on the prefabricated reinforcement pile 1, and an elastic plunger 34 for connecting the sliding sleeve rod 33 and the reinforcement plate.

[0042] The reinforcement box 31 is a cylindrical shell with a circular radial cross-section as a whole. The opposite side walls of the prefabricated reinforcement pile 1 have through holes 12 for the reinforcement box 31 to pass through horizontally. The reinforcement box 31 has a accommodating chamber 311, and the accommodating chamber 311 is filled with a reinforcing agent. The reinforcement box 31 is symmetrically provided with flow holes 312 connected to the accommodating chamber 311 along the axis, and a sealing film 313 is sealed at the flow point. In this embodiment, the reinforcing agent is lime or gypsum, etc., and the reinforcing agent condenses after encountering moisture in the soft foundation, so that the reinforcement box 31 and the foundation are fixedly connected. Among them, the end of the reinforcement box 31 is pointed, which is convenient for insertion into the foundation soil.

[0043] Combination Figure 5 and Figure 6 , a first sliding portion 331 is integrally provided at one end of the sliding sleeve 33 facing the reinforcement box 31, and the first sliding portion 331 is axially slidably installed on the reinforcement box 31. The outer wall of the reinforcement box 31 has a limiting sliding groove 315 along its axial direction for the first sliding portion 331 to limit the sliding. The first sliding portion 331 includes a first section 3311 and a second section 3312. The outer wall of the first section 3311 is flush with the outer wall of the reinforcement box 31, and the second section 3312 is limitedly installed on the reinforcement box 31. When the push rod 32 abuts against and pushes the reinforcement box 31, the sliding sleeve 33 and the reinforcement box 31 slide relative to each other, and at the same time, the circumferential fixation is achieved by the first sliding portion 331. In this embodiment, the sliding sleeve 33 has two groups of first sliding portions 331, and the two groups of first sliding portions 331 are symmetrically arranged along the axis of the sliding sleeve 33.

[0044] The elastic plunger 34 is fixed to the outer wall of the push rod 32, and includes a plunger housing, a plunger spring and a plunger head. The inner wall of the sliding sleeve 33 has a limit groove 332 and an annular groove for the plunger head of the elastic plunger 34 to slide, and the limit groove 332 and the annular groove are connected. The limit groove 332 and the plunger head are adapted to achieve a fixed connection between the push rod 32 and the sliding sleeve 33. The annular groove is an annular groove 333. After the plunger head moves to the annular groove, the push rod 32 and the sliding sleeve 33 are unlocked. Among them, the side of the plunger head facing the reinforcement box 31 has a guide surface 341 to facilitate the elastic plunger 34 to disengage from the limit groove 332.

[0045] The driving assembly 4 includes a sliding column 41 vertically slidingly installed in the prefabricated reinforcement pile 1 , a first driving member 42 fixed to the sliding column 41 and used to push the pushing rod 32 , and a second driving member 43 fixed to the sliding column 41 and used to rotate the sliding sleeve rod 33 .

[0046] The sliding column 41 is coaxially arranged with the prefabricated reinforcement pile 1, and its top passes through the top of the prefabricated reinforcement pile 1. The lifting and lowering of the sliding column 41 can be achieved by a crane. A fixing part 14 is provided at the bottom of the prefabricated reinforcement pile 1 for the end of the sliding column 41 to be inserted. The fixing part 14 is a rotary bearing, the inner ring of the fixing part 14 and the sliding column 41 are plugged and fixed, and the outer ring is fixedly connected to the inner wall of the prefabricated reinforcement pile 1. After the sliding column 41 is inserted into the fixing part 14, the sliding column 41 is fixed in the height direction, and then the sliding column 41 is driven to rotate by a rotating motor or other equipment.

[0047] The first driving member 42 is fixedly sleeved on the sliding column 41 and corresponds to the reinforcing assembly 3. The first driving member 42 is annular as a whole, and its outer side wall has a first inclined surface 421 inclined inwardly toward the fixing member 14. The end of the push rod 32 has a second inclined surface 321 abutting against the first inclined surface 421.

[0048] The second driving member 43 is a first bevel gear, which is coaxially fixed on the sliding column 41. The second driving member 43 corresponds to the reinforcement box 31 one by one, and is located above each group of first driving members 42. A matching transmission member 35 for matching with the second driving member 43 is coaxially fixed on one side of the sliding sleeve 33 facing the sliding column 41. The matching transmission member 35 is a second bevel gear. The inner wall of the sliding sleeve 33 is close to one end of the sliding column 41 and is rotatably matched with the push rod 32.

[0049] according to Figures 4 to 7 When the driving component 4 is started, the sliding column 41 is first moved vertically until the end of the sliding column 41 is inserted into the fixing member 14. At this time, the pushing rod 32 moves away from the axis under the action of the first driving member 42, and at the same time pushes the reinforcement box 31 out of the prefabricated reinforcement pile 1. At this time, the second driving member 43 and the matching transmission member 35 correspond to each other, and the two cooperate with each other. Then, the sliding column 41 is rotated to make the sliding sleeve rod 33 rotate, thereby driving the reinforcement box 31 to rotate synchronously.

[0050] Reference Figure 8 The prefabricated reinforcement pile 1 is provided with a cutting blade 15 for cutting the sealing film 313 on the inner wall of the through hole 12. The cutting blade 15 and the sealing film 313 are arranged correspondingly, and an axial groove 314 corresponding to the cutting blade 15 is provided on the outer wall of the reinforcement box 31. When the reinforcement box 31 slides out of the prefabricated reinforcement pile 1, the sealing film 313 is cut by the cutting blade 15, so that the curing agent in the reinforcement box 31 flows out and mixes with the foundation soil.

[0051] The implementation principle of a reinforcement structure of a composite foundation in an embodiment of the present application is as follows: first, the connecting plate 2 is fixedly placed on the surface of the foundation pit, and then holes are drilled according to the first drill hole 212 and the second drill hole 213 of the connecting plate 2; the prefabricated reinforcement pile 1 is inserted into the drill hole, and the adjacent prefabricated reinforcement piles 1 are fixed by the connecting member 23, and then the driving member is started, and the sliding column 41 is first vertically downward to make the reinforcement box 31 slide out of the prefabricated reinforcement pile 1 horizontally and inserted into the foundation, and the diaphragm is torn to make the curing agent flow out and mix with the foundation soil; after the sliding column 41 is inserted into the fixing member 14, the sliding column 41 is started to rotate, and under the action of the second driving member 43, the reinforcement box 31 is driven to rotate, thereby increasing the outflow of the curing agent from the reinforcement box 31, and mixing it evenly with the foundation soil, and as the curing agent continuously absorbs moisture in the foundation, the foundation mixing and fixation of the reinforcement box 31 is achieved.

[0052] A construction method for composite foundation reinforcement structure S1, cleaning the roadbed surface and opening a foundation pit on the roadbed surface; S2, a connecting plate 2 is arranged at the foundation pit, and the edge of the connecting plate 2 and the inner wall of the foundation pit are cast and fixed; S3, drilling holes at the first drilling hole 212 and the second drilling hole 213 on the connecting plate 2 to form foundation pile holes; S4, inserting the prefabricated reinforcement pile 1 into the first drilling hole 212 and the second drilling hole 213; S5, use the driving assembly 4 to vertically move the sliding column 41, and through the cooperation of the first driving member 42 and the abutting column, the reinforcement box 31 slides horizontally out of the prefabricated reinforcement pile 1 and is inserted into the foundation. The sealing film 313 of the reinforcement box 31 is broken under the action of the cutting blade 15, so that the reinforcement agent in the reinforcement box 31 flows out; S6, the water is transported to the reinforcement box 31 along the connecting pipe by driving the pump body, and then the driving assembly 4 is started again, and the reinforcement box 31 and the sliding sleeve rod 33 are driven to rotate synchronously through the cooperation of the second driving member 43 and the matching transmission member 35, so that the reinforcement agent flows evenly to the outer peripheral side of the reinforcement box 31; S7, injecting grout into the prefabricated reinforcement piles 1, and after the prefabricated reinforcement piles 1 are formed, fixing the adjacent prefabricated reinforcement piles 1 by the connecting pieces 23.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A composite foundation reinforcement structure, characterized in that: The invention comprises a plurality of prefabricated reinforcement piles (1) inserted into a foundation and a connecting plate (2) arranged on the top of the prefabricated reinforcement piles (1), wherein the connecting plate (2) is used to connect the plurality of prefabricated reinforcement piles (1), and the prefabricated reinforcement piles (1) are provided with reinforcement components (3) arranged at intervals along the axis, and a driving component (4) is arranged on the top to drive the reinforcement component (3) to slide or rotate; The reinforcement assembly (3) comprises a reinforcement box (31), wherein the reinforcement box (31) has a containing chamber (311), wherein the containing chamber (311) is filled with a reinforcing agent for reacting with a medium to solidify, and wherein the containing chamber (311) is provided with a flow hole (312) communicating with the inner and outer chambers and a sealing film (313) sealing the flow hole (312); The driving assembly (4) comprises a sliding column (41) vertically slidingly arranged in the prefabricated reinforcement pile (1), a first driving member (42) arranged at intervals along the axis of the sliding column (41), and a second driving member (43) arranged alternately with the first driving member (42), the first driving member (42) being used to drive the reinforcement box (31) to move in a direction away from the axis of the prefabricated reinforcement column, the second driving member (43) being used to drive the reinforcement box (31) to rotate, and the reinforcement assembly (3) having a matching transmission member (35) adapted to the second driving member (43); the reinforcement box (31) first slides out of the pre-buried reinforcement column through the first driving member (42), and then the reinforcement box (31) is rotated through the second driving member (43).

2. A composite foundation reinforcement structure according to claim 1, characterized in that: The connecting plate member (2) comprises a first plate body (21) and a second plate body (22) mounted on the first plate body (21); the first plate body (21) has a mounting groove (211) on its side; the second plate body (22) has a mounting plate (221) adapted to the mounting groove (211); the mounting plate (221) and the bottom wall of the mounting groove (211) are coaxially provided with a first through hole (212) for inserting the prefabricated reinforcement pile (1).

3. A composite foundation reinforcement structure according to claim 2, characterized in that: The first plate body (21) has a plurality of erection sinking grooves (211), the second plate body (22) has erection plates (221) whose number matches the erection sinking grooves (211), the first plate body (21) and the second plate body (22) are further provided with second penetration holes (213) for inserting the prefabricated reinforcement piles (1), and the second penetration holes (213) and the erection sinking grooves (211) are arranged alternately; The connecting plate (2) is further provided with a connecting piece (23) for connecting the prefabricated reinforcement pile (1) in the first penetration hole (212) and the prefabricated reinforcement pile (1) in the second penetration hole (213), the connecting piece (23) comprising a connecting ring (231) fixed to the top of the prefabricated fixing pile, a connecting rod (232) inserted into the connecting ring (231), and a locking pin (233), and a plurality of connecting slots (2311) for inserting the connecting rods (232) are provided at intervals in the circumferential direction on the connecting ring (231).

4. A composite foundation reinforcement structure according to claim 1, characterized in that: The reinforcement assembly (3) comprises a push rod (32) abutting against the reinforcement box (31), a sliding sleeve (33) rotatably mounted on the prefabricated reinforcement pile (1) and sleeved on the push rod (32), and an elastic plunger (34) arranged on the outer wall of the push rod (32) and used to radially fix the sliding sleeve (33); A first sliding portion (331) is provided at the end of the sliding sleeve (33), and the first sliding portion (331) is axially slidably mounted on the reinforcement box (31). The matching transmission member (35) is fixed to an end of the sliding sleeve (33) away from the first sliding portion (331). The sliding sleeve (33) has a limiting groove (332) and an annular groove on the inner side thereof for the elastic plunger member (34) to slide. The limiting groove (332) and the annular groove are communicated. When the reinforcement box (31) slides out to the prefabricated reinforcement pile (1), the elastic plunger member (34) is separated from the limiting groove (332) and slides to the annular groove.

5. A composite foundation reinforcement structure according to claim 4, characterized in that: The first driving member (42) is fixedly connected to the sliding column (41); the end of the pushing rod (32) is provided with a first inclined surface (421); the end of the pushing rod (32) has a second inclined surface (321) that cooperates and abuts against the first inclined surface (421); when the sliding rod moves toward the bottom of the prefabricated reinforcement pile (1), the first driving member (42) drives the pushing rod (32) to move in a direction away from the axis of the prefabricated reinforcement pile (1).

6. A composite foundation reinforcement structure according to claim 5, characterized in that: The second driving member (43) is a first bevel gear fixed to the pushing rod (32), the matching transmission member (35) is a second bevel gear, and a fixing member (14) for the sliding column (41) to be inserted and fixed is provided at the bottom of the inner cavity of the prefabricated reinforcement pile (1), and the fixing member (14) is rotationally matched with the prefabricated reinforcement pile (1), and when the elastic plunger member (34) moves to the annular groove, the sliding column (41) is inserted into the fixing member (14).

7. The composite foundation reinforcement structure according to claim 1, characterized in that: The prefabricated reinforcement pile (1) has a through hole (12) for the reinforcement box (31) to be slidably inserted into the foundation, and the inner wall of the through hole (12) is provided with a cutting piece (15) for abutting against the sealing film (313).

8. The composite foundation reinforcement structure according to claim 1, characterized in that: One end of the reinforcement box (31) away from the axis of the prefabricated reinforcement pile (1) has a pointed portion.

9. A construction method for a composite foundation reinforcement structure, applied to the composite foundation reinforcement structure of any one of claims 1 to 9, characterized in that: The steps include: S1, cleaning the roadbed surface and opening a foundation pit on the roadbed surface; S2, a connecting plate (2) is arranged at the foundation pit, and the edge of the connecting plate (2) and the inner wall of the foundation pit are cast and fixed; S3, drilling holes at the first drilling hole (212) and the second drilling hole (213) on the connecting plate (2) to form foundation pile holes; S4, inserting the prefabricated reinforcement pile (1) into the first penetration hole (212) and the second penetration hole (213); S5, using the driving assembly (4) to vertically move the sliding column (41), and through the cooperation of the first driving member (42) and the abutting column, the reinforcement box (31) slides horizontally out of the prefabricated reinforcement pile (1) and is inserted into the foundation, and the sealing film (313) of the reinforcement box (31) is broken under the action of the cutting blade (15), so that the reinforcement agent in the reinforcement box (31) flows out; S6, driving the pump body to transport water along the connecting pipe to the reinforcement box (31), then starting the driving assembly (4) again, and driving the reinforcement box (31) and the sliding sleeve (33) to rotate synchronously through the cooperation of the second driving member (43) and the matching transmission member (35), so that the reinforcement agent flows evenly toward the outer peripheral side of the reinforcement box (31); S7, injecting grout into the prefabricated reinforcement piles (1), and after the prefabricated reinforcement piles (1) are formed, fixing adjacent prefabricated reinforcement piles (1) by connecting pieces (23).

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