Soft soil roadbed anti-sedimentation reinforcing structure and construction method thereof

Abstract

The invention relates to an anti-sedimentation reinforcing structure for a soft soil roadbed, and belongs to the technical field of foundation sedimentation prevention. The anti-sedimentation reinforcing structure comprises a reinforcing assembly, a connecting assembly, a filling assembly and a drainage assembly. The reinforcing assembly comprises a fixing rod and a sliding rod arranged in the fixing rod in a sealed and sliding mode, a fixing cavity is formed in the fixing rod, outflow holes communicating with the fixing cavity are formed in the fixing rod in the length direction at intervals, a circulation cavity is formed in the sliding rod, and a communicating hole communicating with the fixing cavity is formed in the end of the sliding rod. And a geopolymer is injected into the sliding rod, reaches the fixed cavity along the communicating hole and then penetrates through the outflow hole from the fixed cavity to fix the peripheral side of the rod. The anti-settling agent has the effects of improving the anti-settling performance and improving the structural strength of soil.

Description

Technical Field

[0001] The present application relates to the technical field of foundation anti-settlement, and in particular to a soft soil roadbed anti-settlement reinforcement structure and a construction method thereof. Background Art

[0002] Soft soil foundation is a foundation composed of soft soil, and its soil component is mainly soft soil. Soft soil is mainly composed of fine-grained soil, which has the characteristics of large porosity, high natural water content, high compressibility and low strength. Due to the low strength of soft soil and large potential settlement, under the action of external loads, the soft soil foundation is prone to sinking, landslide, instability and cracking, which brings great harm to road projects.

[0003] The transition section between the soft soil roadbed and the normal roadbed section is the weak link of the roadbed. Under the long-term effect of the road surface load, the roadbed may crack longitudinally and transversely, causing uneven settlement of the road surface and affecting the use of the entire roadbed. At present, common methods for soft soil roadbed construction include soil improvement method, pile foundation reinforcement method, drainage consolidation method, replacement method, etc., which are used to improve the bearing capacity and stability of the soft soil foundation. However, the above processing methods have the problems of large engineering workload, poor anti-settlement effect and low service life. Summary of the invention

[0004] In order to improve the structural strength between the soft foundation and the normal roadbed, the present application provides a soft soil roadbed anti-settlement reinforcement structure and a construction method thereof.

[0005] The present application provides a soft soil roadbed anti-settlement reinforcement structure and a construction method thereof, which adopts the following technical solutions: In a first aspect, a soft soil roadbed anti-settlement reinforcement structure is used for reinforcing and connecting a soft foundation and a road foundation, wherein reinforcement piles are arranged at intervals in the extension direction in the road foundation, and a connection pit is arranged at the connection between the soft foundation and the road foundation, characterized in that it includes a reinforcement component arranged in the connection pit and arranged one-to-one with the reinforcement piles, a connection component connecting the reinforcement component and the reinforcement piles, a filling component filling the connection pit, and a drainage component arranged in the filling pit; the reinforcement component includes a fixing rod and a sealing rod. A sliding rod is slidably arranged in the fixing rod, a fixing chamber is provided in the fixing rod, outflow holes communicating with the fixing chamber are provided at intervals along the length direction of the fixing rod, a flow chamber is provided in the sliding rod, and a connecting hole communicating with the fixing chamber is provided at the end thereof, geopolymer is injected into the sliding rod, the geopolymer flows along the connecting hole to the fixing chamber, and then passes from the fixing chamber to the outer peripheral side of the fixing rod through the outflow hole; the connecting assembly comprises a first connecting rod connecting the fixing rod and the reinforcement assembly, and a second connecting rod inserted into the soft foundation.

[0006] By adopting the above technical solution, during the construction of the anti-settlement reinforcement structure, the fixed rod and the sliding rod are first assembled together, and then the reinforcement pile assembly is inserted into the connection foundation as a whole, and then the geopolymer is injected into the sliding rod, and the geopolymer enters the fixed chamber along the outflow hole, and then flows out to the outer peripheral side of the fixed rod through the outflow hole. After the geopolymer condenses, it fills the gap in the soft foundation and forms a reinforcement body; at regular intervals, the sliding rod slides upward at intervals, so that continuous expansion reinforcement bodies are sequentially formed outside the fixed rod; The first connecting rod of the connecting assembly connects the fixing rod and the reinforcement pile of the road foundation, and the second connecting rod is inserted into the soft foundation to further improve the connection strength between the soft foundation and the road foundation; the filling assembly fills and covers the connecting foundation, and uses the drainage assembly to reduce the impact of external moisture and underground moisture on the connecting assembly and the reinforcement assembly.

[0007] Optionally, a positioning assembly for interval sliding is provided on the sliding rod, and the positioning assembly includes a positioning block provided on the outer side wall of the sliding rod and a positioning elastic member connected to the positioning block, and positioning grooves cooperating with the positioning block are provided on the inner wall of the fixed rod at intervals along the axis; The positioning groove is located between adjacent outflow holes, the inner wall of the fixing rod has a limiting slot for the positioning assembly to be inserted, the end of the limiting slot is provided with a rotation groove extending circumferentially, and the inner axis of the fixing rod has a limiting groove corresponding to the positioning groove.

[0008] By adopting the above technical solution and setting the positioning assembly, when the sliding rod slides upward, the sliding rod can be positioned and paused between adjacent outflow holes through the cooperation of the positioning block and the positioning groove, so that the construction workers on the ground can pour according to the pause situation of the sliding rod and ensure the continuous uniformity of the reinforcement on the outer side of the fixed rod; the setting of the limiting slot can limit the insertion of the sliding rod and improve the smoothness of the sliding insertion of the sliding rod; when pouring is required, the sliding rod is rotated so that the positioning assembly corresponds to the positioning groove in the axial direction, and the limiting groove and the circumference of the sliding rod are used to limit the sliding rod.

[0009] Optionally, there are multiple outflow holes evenly spaced along the axis, and guide slopes are provided on the upper and lower sides of the opening of the outflow hole. The guide slope on the upper side extends to the outflow hole at the top, and a blocking plate is provided below the outflow hole to block the extension of the guide slope.

[0010] By adopting the above technical solution, the outflow holes are evenly arranged on the fixed rod in the circumference, so that after the geopolymer flows out, an annular reinforcement body is formed outside the fixed rod. Under the action of the guide slope, the geopolymer solidifies into a sphere, and the blocking plate can block the flow of the geopolymer, reducing the probability of the geopolymer entering the outflow hole of the upper layer.

[0011] Optionally, a seal for sealing the limiting slot is also provided on the sliding rod, and the seal includes a sealing elastic member, two sealing extrusion blocks and a sealing deformation bag. The sealing extrusion block is radially slidably installed on the sliding rod through the sealing elastic member, and the sealing deformation bag connects the two sealing extrusion blocks. The sealing extrusion block is provided with a sealing inclined surface for abutting the side wall of the limiting side groove; when the seal and the limiting slot correspond, the sealing elastic member drives the sealing extrusion block to slide radially, and through the abutment between the sealing inclined surface and the side wall of the limiting side groove, drives the two sealing extrusion blocks to move circumferentially toward each other, thereby driving the sealing deformation bag to expand and deform.

[0012] By adopting the above technical solution and setting the seal, the gap formed between the sliding rod and the limiting slot after the sliding rod rotates can be sealed and filled, so that the geopolymer is not easy to leak upward along the limiting slot, thereby further improving the forming effect of the reinforcement body. The above seal has a simple structure and is easy to assemble. After the seal is rotated to correspond to the limiting slot, the seal automatically slides radially into the limiting slot and undergoes a certain expansion deformation, and the sealing effect is ideal.

[0013] Optionally, an insertion cone is provided at the end of the fixed rod, and the insertion cone includes two inclined plates symmetrically arranged along an axis and a rotating shaft. The end of the fixed rod has a rotating shaft rotatably connected to the two inclined plates. The inclined plate is provided with a sliding groove along the inclined direction, and a rotating seat cooperating with the rotating shaft is slidably provided in the sliding groove.

[0014] By adopting the above technical solution, the setting of the insertion cone can facilitate the axial insertion of the fixing rod into the connection pit, thereby improving the efficiency of insertion. The insertion cone includes two inclined plates. The cooperation between the two inclined plates and the fixing rod and the sliding rod enables the insertion cone to switch from a V-shape to a straight shape when the sliding rod rotates upward, thereby improving the stability of the fixing rod in the foundation.

[0015] Optionally, the connecting assembly includes a first connecting rod arranged at the top of the fixing rod and a connecting elastic member connected to the first connecting rod, the reinforcement pile body has an extension rod body toward the first connecting rod in a radial direction, the first connecting rod is radially slidably arranged on the fixing rod, the first connecting rod has a connecting chamber connected to the fixing chamber, and the extension rod body has an extension chamber for inserting the first connecting rod.

[0016] By adopting the above technical solution, a matching method of the first connecting rod and the reinforced pile body is disclosed. The first connecting rod and the extension rod body are plug-in matched. When the bottom of the sliding rod moves to the top of the fixed chamber, the geopolymer can enter the first connecting rod and the extension rod. After the geopolymer solidifies, the connection between the fixed rod and the reinforced pile body is realized, thereby improving the anti-settling ability of the reinforcement assembly.

[0017] Optionally, an inward-retracting portion is provided at the top of the sliding rod, and the outer diameter of the inward-retracting portion is smaller than the fixed chamber. When the inward-retracting portion corresponds to the first connecting rod, the first connecting rod and the extension rod body are in a spaced state. When the sliding rod slides upward, the sliding rod drives the first connecting rod to move toward the extension rod body and inserts the first connecting rod into the extension rod body. The sliding rod has a side through hole corresponding to the first connecting rod.

[0018] By adopting the above technical solution, a method for inserting the first connecting rod is disclosed, so that after the sliding rod is rotated, the correspondence between the positioning assembly and the positioning groove, the correspondence between the seal and the limit slot, and the horizontal movement of the first connecting rod are achieved simultaneously during the subsequent lifting.

[0019] Optionally, the second connecting rod is symmetrically arranged with the first connecting rod along the axis, and the cooperation mode between the second connecting rod and the fixing rod is consistent with the cooperation mode between the first connecting rod and the fixing rod. The second connecting rod is tilted downward, and an insertion portion is provided at the end of the second connecting rod.

[0020] By adopting the above technical solution, the second connecting rod is inserted into the soft foundation, which further improves the connection strength between the fixing rod and the soft foundation.

[0021] Optionally, the filling component includes a deep reinforcement layer, a middle reinforcement layer and a shallow reinforcement layer in sequence along the height direction; the drainage component is arranged in the shallow reinforcement layer, the drainage component includes a prefabricated plate and a cover plate arranged on the top of the prefabricated plate, the shallow reinforcement layer has a drainage groove for installing the drainage component, the top surface of the shallow reinforcement layer has an inclined slope leading to the drainage groove, and the cover plate has a drainage hole connected to the drainage groove.

[0022] In a second aspect, a construction method for a soft soil roadbed anti-settlement reinforcement structure is applied to the above anti-settlement reinforcement structure, comprising the following steps: S1, digging the trapezoidal pit at the connection between the soft foundation and the road foundation, the trapezoidal pit being a connection foundation pit, and the extension rod of the reinforcement pile body is exposed at the bottom of the connection foundation pit; S2, installing an anti-settlement reinforcement structure inside the soft soil layer, assembling a fixed rod and a sliding rod, so that the bottom wall of the sliding rod is attached to the bottom wall of the fixed chamber, the positioning assembly is located in the limiting slot, the sealing elastic member of the sealing member is in a compressed state, and the insertion cone is in a V shape; S3, inserting the fixing rod axially into the connection pit along the height direction, and stopping the insertion of the fixing rod after the fixing rod and the extension rod body correspond to each other in the horizontal direction; S4, rotating the sliding rod, so that the positioning assembly is separated from the limiting slot and corresponds to the positioning slot, the sealing member seals the gap between the sliding rod and the limiting slot, and then the sliding rod is lifted upward, and the intermittent rise of the sliding rod is achieved through the cooperation of the positioning block and the positioning slot, and the insertion cone is rotated and deformed into a straight line under the action of the sliding rod, and at the same time, the first connecting rod and the second connecting rod are respectively inserted into the extension rod body and the soft foundation; S5. Inject geopolymer into the sliding rod at each interval. The geopolymer passes through the connecting hole, the fixed chamber, and the outflow hole, and solidifies with the soft foundation and the road foundation to form a reinforced body. After the geopolymer solidifies for the first time, the sliding rod is lifted, which will cause the insertion cone and the sliding rod to separate; S6, after the sliding rod moves upward to the top of the fixed chamber, the fixed rod is inserted into the extension rod body, and the geopolymer flows toward the extension rod body and the second connecting rod; S7. After the sliding rod is completely separated from the fixed rod, a deep reinforcement layer, a middle reinforcement layer and a shallow reinforcement layer are laid in the connection pit in sequence; S8. Install drainage components on top of the shallow reinforcement layer.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application forms a continuous expansion reinforcement body along the axial direction on the outer side wall of the fixing rod by setting a reinforcement component, thereby improving the anti-settling performance; 2. The present application sets up a connection component, wherein the first connecting rod connects the fixing rod and the reinforcement pile of the road foundation, and the second connecting rod is inserted into the soft foundation to further improve the connection strength between the soft foundation and the road foundation. The filling component fills and covers the connection foundation, and the drainage component reduces the impact of external moisture and underground moisture on the connection component and the reinforcement component; 3. The present application can seal and fill the gap formed between the sliding rod and the limiting slot after the sliding rod rotates through the setting of the sealing member, so that the geopolymer is not easy to leak upward along the limiting slot, thereby improving the forming effect of the reinforcement body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall cross-sectional schematic diagram of an embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the structure of the reinforcement component of the embodiment of the present application.

[0026] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0027] Figure 4 It is a schematic diagram of the inner wall of the fixing rod according to an embodiment of the present application.

[0028] Figure 5It is a schematic diagram of the structure of the sealing member according to an embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the structure of the insertion cone portion of an embodiment of the present application.

[0030] Figure 7 It is a schematic diagram of the structure of the inclined plate of an embodiment of the present application.

[0031] Figure 8 This is a schematic diagram of an embodiment of the present application when the first connecting rod and the extension rod are not matched.

[0032] Fig. 9 It is a schematic diagram of the structure of the filling component and the drainage component of the embodiment of the present application.

[0033] Explanation of the reference numerals: 1. soft foundation; 2. road foundation; 21. reinforcement pile body; 211. extension rod body; 2111. extension chamber; 2112. snap-in groove; 3. reinforcement assembly; 31. fixing rod; 311. fixing chamber; 312. outflow hole; 3121. guide slope; 313. positioning groove; 314. limiting slot; 315. rotation groove; 316. blocking plate; 32. sliding rod; 321. circulation chamber; 322. connecting hole; 323. mounting groove; 324. hinge seat; 325. retracting part; 33. insertion cone; 331. inclined plate; 3311. sliding groove; 3312. rotation seat; 332. rotation axis ; 34. Positioning assembly; 341. Positioning block; 3411. Abutment slope; 342. Positioning elastic member; 35. Sealing member; 351. Sealing elastic member; 352. Sealing extrusion block; 3521. Sealing slope; 353. Sealing deformation bag; 36. Telescopic rod; 361. Easy-to-break area; 4. Connecting assembly; 41. First connecting rod; 411. Connecting chamber; 412. Snap-in member; 42. Second connecting rod; 5. Filling assembly; 51. Deep reinforcement layer; 52. Middle reinforcement layer; 53. Shallow reinforcement layer; 531. Drainage trough; 532. Inclined slope; 6. Drainage assembly; 61. Prefabricated board; 62. Cover plate; 621. Drainage hole. DETAILED DESCRIPTION

[0034] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] The following is combined with Figure 1-9 This application is described in further detail.

[0036] The embodiment of the present application discloses a soft soil roadbed anti-settlement reinforcement structure.

[0037] Reference Figure 1 , a soft soil roadbed anti-settlement reinforcement structure, used for structural reinforcement of the connection between soft foundation 1 and road foundation 2 to improve the anti-settlement ability. The road foundation 2 is formed by combining the two processes of pile foundation reinforcement method and replacement filling method, and its top surface is used as a road to bear vertical loads for a long time. Reinforcement pile bodies 21 are pre-buried in the road foundation 2 at uniform intervals along the extension direction of the road, and the reinforcement pile bodies 21 are concrete steel bars. The soft foundation 1 is located on both sides of the road foundation 2, and a connection pit for the construction of the reinforcement structure of this application is dug along the extension direction of the road at the connection between the soft foundation 1 and the road foundation 2, and the cross-section of the connection pit in the height direction is trapezoidal. The opposite side walls of the reinforcement pile body 21 have an extension rod body 211 that passes through the road foundation 2 and extends to the connection pit.

[0038] The anti-settlement reinforcement structure includes a reinforcement component 3 for inserting into a connection pit, a connection component 4 connecting the reinforcement component 3 and the reinforcement pile body 21 , a filling component 5 for filling the connection pit, and a drainage component 6 arranged on the filling component 5 .

[0039] Reference Figure 1 and Figure 2The reinforcement assembly 3 and the reinforcement pile body 21 are arranged one by one, and the reinforcement assembly 3 includes a fixed rod 31, a sliding rod 32 slidably arranged in the fixed rod 31, and an insertion cone 33 arranged at the bottom end of the fixed rod 31 and connected to the sliding rod 32. The fixed rod 31 is a circular rod with an open top as a whole, and has a fixed chamber 311 inside the fixed rod 31, and the fixed rod 31 is evenly spaced along the axial direction. The outflow holes 312 connected to the fixed chamber 311 are opened, and the outflow holes 312 are used for the outflow of the geopolymer in the fixed chamber 311.

[0040] The sliding rod 32 is also a round rod with an opening at the top, and its outer wall is matched with the inner wall of the fixed rod 31. The sliding rod 32 has a circulation chamber 321, and the sliding rod 32 has a connecting hole 322 on the bottom wall of the circulation chamber 321 that penetrates the two side end faces and connects to the fixed chamber 311. After the reinforcement component 3 is inserted, the sliding rod 32 is moved upward so that the bottom of the sliding rod 32 and the inner wall of the fixed rod 31 form a fixed chamber 311 with a certain space, and the geopolymer is injected into the sliding rod 32. The geopolymer passes through the connecting hole 322 to the fixed chamber 311, and then passes through the outflow hole 312 to the outside of the fixed rod 31. After the geopolymer solidifies, it forms a reinforcement body with the fixed rod 31. Geopolymer is a prior art, which is an inorganic polymer material made of natural minerals containing silicon and aluminum or industrial solid waste as the main raw materials through a specific preparation process.

[0041] Reference Figure 2 and Figure 3 In order to facilitate the interval upward movement of the sliding rod 32, a positioning assembly 34 is provided on the sliding rod 32, and positioning grooves 313 cooperating with the positioning assembly 34 are provided at intervals along the axis on the inner wall of the fixed rod 31, and the positioning grooves 313 are located between adjacent outflow holes 312. The positioning assembly 34 includes a positioning block 341 and a positioning elastic member 342 connected to the positioning block 341. The positioning elastic member 342 is a spring member, and the sliding rod 32 has a mounting groove 323 for mounting the positioning assembly 34. One end of the positioning elastic member 342 is fixed to the bottom wall of the mounting groove 323, and the other end is fixedly connected to the positioning block 341. The positioning block 341 fits the side wall of the mounting groove 323 to reduce the probability of the geopolymer entering the positioning groove 313.

[0042] When the construction workers use the lifting equipment or manually lift the sliding rod 32, the pause produced by the positioning block 341 and the positioning groove 313 can limit the movement of the sliding rod 32 to a certain extent. The construction workers stop lifting according to the pause produced by the sliding rod, and then inject geopolymer into the sliding rod 32. After the solidification time of the geopolymer is exceeded, the sliding rod 32 is continuously lifted upward to carry out the construction of the next layer of reinforcement. Among them, the top of the positioning block 341 also has an abutting inclined surface 3411 for abutting the top wall of the positioning groove 313, so that the positioning block 341 can be easily removed from the positioning groove 313, thereby improving the lifting efficiency of the sliding rod 32.

[0043] Combination Figure 4 and Figure 5 The inner wall of the fixed rod 31 also has a limiting slot 314 for the sliding rod 32 to be inserted into, and the limiting slot 314 and the positioning block 341 are adapted. The limiting slot 314 is arranged along the axial direction. The top of the limiting slot 314 passes through the top surface of the fixed rod 31, and there is a gap between the bottom and the bottom wall of the fixed chamber 311. The bottom wall of the limiting slot 314 extends along the circumferential direction to form a rotation groove 315. One end of the rotation groove 315 is connected to the limiting slot 314, and the other end corresponds to the positioning slot 313, so that when the sliding rod 32 is inserted into the fixed rod 31, the positioning block 341 and the limiting slot 314 are first inserted correspondingly, and when the sliding rod 32 needs to be lifted, the sliding rod 32 is rotated circumferentially and then lifted upward.

[0044] The side wall of the sliding rod 32 is also slidably mounted with a sealing member 35 for sealing the limiting slot 314. The sealing member 35 includes two groups of sealing elastic members 351 spaced apart in the circumferential direction, a sealing extrusion block 352 connecting the ends of the sealing elastic members 351, and a sealing deformation bag 353 connecting the two sealing extrusion blocks 352. The sealing elastic member 351 is a compression spring member. Under normal conditions, the sealing elastic member 351 is in a compressed state. When the sliding rod 32 rotates, the sealing member 35 corresponds to the limiting slot 314, and the sealing elastic member 351 drives the sealing extrusion block 352 to slide radially toward the limiting slot 314.

[0045] The sealing deformation capsule 353 has a deformation chamber inside, and its outer wall is evenly arranged with deformation lines along the circumference of the axis. The two ends of the sealing deformation capsule 353 in the circumferential direction are respectively fixedly connected to the two sealing extrusion blocks 352. The sealing extrusion blocks 352 and the sealing deformation capsule 353 form a sealing arc for inserting into the limiting slot 314. When the sealing arc is in the sliding rod 32, its curvature is greater than the curvature of the limiting slot 314. The cross section of the sealing arc facing the inner wall of the fixed rod 31 is adapted to the inner wall of the limiting slot 314.

[0046] The end of the sealing extrusion block 352 has a sealing slope 3521 for abutting against the side wall of the limiting slot 314. Through the setting of the sealing slope 3521, when the sealing arc slides radially, the two sealing extrusion blocks 352 move toward each other, so that the sealing deformation capsule 353 is squeezed and deformed, thereby improving the sealing effect of the limiting slot 314 and reducing the probability of the geopolymer flowing upward along the limiting slot 314.

[0047] Reference Figure 3 and Figure 4In this embodiment, the number of outflow holes 312 on the same horizontal plane is four, and the four outflow holes 312 are evenly spaced along the axis. Guide slopes 3121 are provided on both the upper and lower sides of the opening of the outflow hole 312. The two guide slopes 3121 are arranged in a trend away from each other from the fixed chamber 311 to the outside. The upper guide slope 3121 is defined as an upper slope, and the upper slope extends upward to the lower side of the previous outflow hole 312. A blocking plate 316 corresponding to the upper slope is fixedly installed below the outflow hole 312 to prevent the polymer of the next layer from spreading into the previous outflow hole 312.

[0048] Reference Figure 6 and Figure 7 The insertion cone 33 includes two inclined plates 331 symmetrically arranged along the axis and a rotating shaft 332 connecting the two inclined plates 331. The two inclined plates 331 are V-shaped after being assembled, and the rotating shaft 332 corresponds to the central axis of the fixed rod 31 and is perpendicular to each other. The bottom of the fixed rod 31 is provided with rotating shafts respectively connected to the two inclined plates 331. The inclined plate 331 has a sliding groove 3311 along the inclined direction on one side close to the fixed rod 31, and the inclined plate 331 is slidingly installed with a rotating seat 3312 that is rotatably matched with the rotating shaft 332 in the sliding groove 3311. Among them, the inclined plate 331 is located outside the axis of the fixed rod 31 away from the outside of the blocking plate 316, that is, the projection of the blocking plate 316 in the axis direction is located inside the inclined plate 331, so that when the fixed rod 31 is inserted into the connection pit, the insertion cone 33 can improve the efficiency of insertion, and at the same time, it plays a protective role for the blocking plate 316 at the outflow hole 312.

[0049] A telescopic rod 36 is provided on the outer side of the bottom of the sliding rod 32, which passes through the bottom of the fixed rod 31 and is connected to the inclined plate 331. The telescopic rod 36 includes an outer rod hinged to the top surface of the inclined plate 331 and an inner rod sleeved on the outer rod and rotatably installed at the bottom of the sliding rod 32. A compression spring member abutting the inner rod is installed in the outer rod. A hinge seat 324 for the inner rod to rotate is installed at the bottom of the sliding rod 32 in a circumferentially sliding manner. The inner rod has an easy-to-bend area 361 on one side close to the bottom of the sliding rod, so that the sliding rod 32 can slide upward, and when the inclined plate 331 rotates in a V-shape to a horizontal straight line, the sliding rod 32 is continuously pulled upward, which will cause the easy-to-bend area 361 of the sliding rod 32 to break, and the sliding rod 32 and the inserted cone 33 are separated.

[0050] Reference Figure 8 and Fig. 9The connecting assembly 4 includes a first connecting rod 41 for connecting the fixed rod 31 and the extension rod body 211, and a second connecting rod 42 inserted into the soft foundation 1. The first connecting rod 41 is radially slidably installed on the top of the fixed rod 31, and the first connecting rod 41 has a connecting chamber 411 connected to the fixed chamber 311. The extension rod body 211 is tubular as a whole, and has an extension chamber 2111 inside, and the inner diameter of the extension chamber 2111 is larger than the outer diameter of the first connecting rod 41.

[0051] The top of the sliding rod 32 has an inward portion 325, the outer diameter of the inward portion 325 is smaller than the inner diameter of the fixed chamber 311, and its horizontal cross-section is an arc. A plurality of clips 412 are arranged at intervals on the side wall of the first connecting rod 41. The clips 412 are fixed to the side wall of the first connecting rod 41 by a spring, so they have a certain deformation ability, and the extension chamber 2111 has a clip groove 2112 for locking with the clip 412. When the end of the inward portion 325 corresponds to the first connecting rod 41, the first connecting rod 41 and the extension rod body 211 are not sleeved and matched. When the sliding rod 32 rotates, the first connecting rod 41 is inserted into the connecting chamber 411 under the guidance of the inward portion 325, so that the clip 412 and the clip groove 2112 match.

[0052] The second connecting rod 42 and the first connecting rod 41 are arranged symmetrically along the axis, and are used to be radially inserted into the soft foundation 1. The cooperation mode between the second connecting rod 42 and the fixing rod 31 is the same as the cooperation mode between the first connecting rod 41 and the fixing rod 31. The difference between the first connecting rod 41 and the second connecting rod 42 is that the end of the second connecting rod 42 has a guide cone portion for inserting into the soft foundation 1, and a through hole connected to the inner cavity of the second connecting rod 42 is opened on the guide cone portion.

[0053] Reference Fig. 9 The filling assembly 5 is used to fill the connection foundation pit constructed by the reinforcement assembly 3. The filling assembly 5 includes a deep reinforcement layer 51, a middle reinforcement layer 52 and a shallow reinforcement layer 53 in the height direction. The deep reinforcement layer 51 is paved with a material with larger particles and higher density, which is a gravel layer in this application. The middle reinforcement layer 52 is a material that can physically and chemically react with soft soil, such as ash soil. The shallow reinforcement layer 53 is a material with better compactness, which is fine sand, clay, etc. in this application.

[0054] The drainage assembly 6 includes a prefabricated plate 61 and a cover plate 62 installed on the top of the prefabricated plate 61. The top surface of the shallow reinforcement layer 53 has a drainage groove 531 for installing the drainage assembly 6. The top surface of the shallow reinforcement layer 53 has an inclined slope 532 leading to the drainage groove 531. The cover plate 62 is provided with drainage holes 621 connected to the drainage groove 531 at intervals along the extension direction of the road. The end of the drainage groove 531 is connected to a hidden well in the foundation.

[0055] A construction method for a soft soil roadbed anti-settlement reinforcement structure, the specific steps are as follows: S1, digging the trapezoidal pit at the connection between the soft foundation 1 and the road foundation 2, the trapezoidal pit is a connecting foundation pit, and the extension rod body 211 of the reinforcement pile body 21 is exposed at the bottom of the connecting foundation pit; S2, installing an anti-settlement reinforcement structure inside the soft soil layer, assembling the fixed rod 31 and the sliding rod 32, so that the bottom wall of the sliding rod 32 is attached to the bottom wall of the fixed chamber 311, the positioning assembly 34 is located in the limiting slot 314, the sealing elastic member 351 of the sealing member 35 is in a compressed state, and the inserted cone 33 is in a V shape; S3, insert the fixing rod 31 axially into the connection foundation pit along the height direction, and stop inserting the fixing rod 31 after the fixing rod 31 and the extension rod body 211 correspond to each other in the horizontal direction. At this time, the second connecting rod 42 has been obliquely inserted into the soft foundation 1; S4, the sliding rod 32 is rotated so that the positioning assembly 34 is disengaged from the limiting slot 314 and corresponds to the positioning slot 313, and the sealing member 35 seals the gap between the sliding rod 32 and the limiting slot 314, and then the sliding rod 32 is lifted upward, and the positioning block 341 cooperates with the positioning slot 313 to realize the intermittent rise of the sliding rod 32, and the inserted cone 33 is rotated and deformed into a straight line under the action of the sliding rod 32; S5. Geopolymer is injected into the sliding rod 32 at each interval. The geopolymer passes through the connecting hole 322, the fixed chamber 311, and the outflow hole 312, and solidifies with the soft foundation 1 and the road foundation 2 to form a reinforced body. After the geopolymer solidifies for the first time, the sliding rod 32 is lifted, which will cause the insertion cone 33 and the sliding rod 32 to separate. S6, after the sliding rod 32 moves upward to the top of the fixing chamber 311, the fixing rod 31 is inserted into the extension rod body 211, and the geopolymer flows toward the extension rod body 211 and the second connecting rod 42; S7, after the sliding rod 32 is completely separated from the fixed rod 31, a deep reinforcement layer 51, a middle reinforcement layer 52 and a shallow reinforcement layer 53 are laid in the connection pit in sequence; S8. Install the drainage assembly 6 on the top of the shallow reinforcement layer 53.

[0056] 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 soft soil roadbed anti-settlement reinforcement structure, used for reinforcing and connecting a soft foundation (1) and a road foundation (2), wherein reinforcement piles (21) are arranged at intervals in the road foundation (2) along the extension direction, and a connection foundation pit is arranged at the connection between the soft foundation (1) and the road foundation (2), characterized in that: It comprises a reinforcement component (3) arranged in the connection pit and arranged one-to-one with the reinforcement pile body (21), a connection component (4) connecting the reinforcement component (3) and the reinforcement pile body (21), a filling component (5) for filling the connection pit, and a drainage component (6) arranged in the filling pit; The reinforcement assembly (3) comprises a fixed rod (31) and a sliding rod (32) sealingly and slidingly arranged in the fixed rod (31); a fixed chamber (311) is provided in the fixed rod (31); outflow holes (312) communicating with the fixed chamber (311) are provided in the fixed rod (31) at intervals along the length direction; a flow chamber (321) is provided in the sliding rod (32) and a connecting hole (322) communicating with the fixed chamber (311) is provided at an end thereof; a geopolymer is injected into the sliding rod (32); the geopolymer flows along the connecting hole (322) to the fixed chamber (311), and then passes from the fixed chamber (311) through the outflow hole (312) to the outer peripheral side of the fixed rod (31); The connection assembly (4) comprises a first connecting rod (41) connecting the fixing rod (31) and the reinforcement assembly (3), and a second connecting rod (42) inserted into the soft foundation (1).

2. The soft soil roadbed anti-settlement reinforcement structure according to claim 1, characterized in that: The sliding rod (32) is provided with a positioning assembly (34) for interval sliding, the positioning assembly (34) comprising a positioning block (341) provided on the outer wall of the sliding rod (32) and a positioning elastic member (342) connected to the positioning block (341), and the inner wall of the fixed rod (31) is provided with positioning grooves (313) cooperating with the positioning block (341) at intervals along the axis; The positioning groove (313) is located between adjacent outflow holes (312), the inner wall of the fixing rod (31) has a limiting slot (314) for the positioning assembly (34) to be inserted into, and a rotation groove (315) is provided at the end of the limiting slot (314) along the circumferential extension.

3. The soft soil roadbed anti-settlement reinforcement structure according to claim 1, characterized in that: A plurality of the outflow holes (312) are evenly spaced along the axis, and guide slopes (3121) are provided on both upper and lower sides of the opening of the outflow hole (312), the guide slope (3121) on the upper side extends to the outflow hole (312) at the top, and a blocking plate (316) is provided below the outflow hole (312) of the upper layer to limit the extension of the guide slope (3121) of the lower layer.

4. The soft soil roadbed anti-settlement reinforcement structure according to claim 2, characterized in that: The sliding rod (32) is also provided with a sealing member (35) for sealing the limiting slot (314), the sealing member (35) comprising a sealing elastic member (351), two sealing extrusion blocks (352) and a sealing deformation capsule (353), the sealing extrusion block (352) being radially slidably mounted on the sliding rod (32) via the sealing elastic member (351), the sealing deformation capsule (353) connecting the two sealing extrusion blocks (352), and the sealing extrusion block (352) being provided with a sealing inclined surface (3521) for abutting against the side wall of the limiting side groove; when the sealing member (35) corresponds to the limiting slot, the sealing elastic member (351) drives the sealing extrusion block (352) to slide radially, and through the abutment between the sealing inclined surface (3521) and the side wall of the limiting side groove, drives the two sealing extrusion blocks (352) to move circumferentially in a direction of approaching each other, thereby driving the sealing deformation capsule (353) to expand and deform.

5. The soft soil roadbed anti-settlement reinforcement structure according to claim 1, characterized in that: An insertion cone (33) is provided at the end of the fixed rod (31), and the insertion cone (33) comprises two inclined plates (331) and a rotation shaft (332) symmetrically arranged along an axis. The two inclined plates (331) are connected via the rotation shaft (332), and the rotation shaft (332) and the fixed rod (31) are coaxially corresponding. The end of the fixed rod (31) has a rotation shaft (332) rotatably connected to the two inclined plates (331). The inclined plates (331) ) is provided with a sliding groove (3311) along the tilting direction, and a rotating seat (3312) cooperating with the rotating shaft (332) is slidably arranged in the sliding groove (3311); a telescopic rod (36) connected to the tilting plate (331) is arranged at the bottom of the sliding rod (32), and both ends of the telescopic rod (36) are respectively hinged to the sliding rod (32) and the tilting plate (331), and one end of the telescopic rod (36) and the sliding rod (32) is hinged and can slide circumferentially along the axis.

6. The soft soil roadbed anti-settlement reinforcement structure according to claim 1, characterized in that: The connecting assembly (4) comprises a first connecting rod (41) arranged at the top of the fixing rod (31) and a clamping piece arranged on the side wall of the first connecting rod (41); the reinforcing pile body (21) has an extension rod body (211) facing the first connecting rod (41) in the radial direction; the first connecting rod (41) is radially slidably arranged on the fixing rod (31); the first connecting rod (41) has a connecting chamber (411) connected to the fixing chamber (311); the extension rod body (211) has an extension chamber (2111) for inserting the first connecting rod (41); and the clamping piece (412) is clamped on the inner wall of the extension chamber (2111).

7. The soft soil roadbed anti-settlement reinforcement structure according to claim 6, characterized in that: An inwardly-retracted portion (325) is provided at the top of the sliding rod (32), and the outer diameter of the inwardly-retracted portion (325) is smaller than that of the fixed chamber (311). When the inwardly-retracted portion (325) corresponds to the first connecting rod (41), the first connecting rod (41) and the extension rod body (211) are in a spaced state. When the sliding rod (32) slides upward, the sliding rod (32) drives the first connecting rod (41) to move toward the extension rod body (211) and enables the first connecting rod (41) to be inserted into the extension rod body (211).

8. The soft soil roadbed anti-settlement reinforcement structure according to claim 1, characterized in that: The second connecting rod (42) and the first connecting rod (41) are symmetrically arranged along the axis, and the matching mode between the second connecting rod (42) and the fixing rod (31) is consistent with the matching mode between the first connecting rod (41) and the fixing rod (31), and a guide cone is provided at the end of the second connecting rod (42).

9. The soft soil roadbed anti-settlement reinforcement structure according to claim 1, characterized in that: The filling component (5) comprises a deep reinforcement layer (51), a middle reinforcement layer (52) and a shallow reinforcement layer (53) in sequence along the height direction; the drainage component (6) is arranged on the shallow reinforcement layer (53), the drainage component (6) comprises a prefabricated plate (61) and a cover plate (62) arranged on the top of the prefabricated plate (61), the shallow reinforcement layer (53) has a drainage groove (531) for installing the drainage component (6), the top surface of the shallow reinforcement layer (53) has an inclined slope leading to the drainage groove (531), and the cover plate (62) has a drainage hole (621) connected to the drainage groove (531).

10. A construction method for a soft soil roadbed anti-settlement reinforcement structure, applied to the reinforcement structure according to any one of claims 1 to 9, characterized in that: The steps include: S1. Digging the trapezoidal pit at the connection between the soft foundation and the road foundation, the trapezoidal pit is a connecting foundation pit, and the extension rod of the reinforcement pile body is exposed at the bottom of the connecting foundation pit; S2, installing an anti-settlement reinforcement structure inside the soft soil layer, assembling a fixed rod and a sliding rod, so that the bottom wall of the sliding rod is attached to the bottom wall of the fixed chamber, the positioning assembly is located in the limiting slot, the sealing elastic member of the sealing member is in a compressed state, and the insertion cone is in a V shape; S3, inserting the fixing rod axially into the connection pit along the height direction, and stopping the insertion of the fixing rod after the fixing rod and the extension rod body correspond to each other in the horizontal direction; S4, rotating the sliding rod, so that the positioning assembly is separated from the limiting slot and corresponds to the positioning slot, the sealing member seals the gap between the sliding rod and the limiting slot, and then the sliding rod is lifted upward, and the intermittent rise of the sliding rod is achieved through the cooperation of the positioning block and the positioning slot, and the insertion cone is rotated and deformed into a straight line under the action of the sliding rod, and at the same time, the first connecting rod and the second connecting rod are respectively inserted into the extension rod body and the soft foundation; S5. Inject geopolymer into the sliding rod at each interval. The geopolymer passes through the connecting hole, the fixed chamber, and the outflow hole, and solidifies with the soft foundation and the road foundation to form a reinforced body. After the geopolymer solidifies for the first time, the sliding rod is lifted, which will cause the insertion cone and the sliding rod to separate; S6, after the sliding rod moves upward to the top of the fixed chamber, the fixed rod is inserted into the extension rod body, and the geopolymer flows toward the extension rod body and the second connecting rod; S7. After the sliding rod is completely separated from the fixed rod, a deep reinforcement layer, a middle reinforcement layer and a shallow reinforcement layer are laid in the connection pit in sequence; S8. Install drainage components on top of the shallow reinforcement layer.

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