CN113293664B

CN113293664B - Large-area weak roadbed reinforcing structure

Info

Publication number: CN113293664B
Application number: CN202110559202.XA
Authority: CN
Inventors: 郭福金; 杨章财; 彭赛; 李治军; 欧阳波
Original assignee: Hunan Zhongyao Transportation Engineering Co ltd
Current assignee: Hunan Zhongyao Transportation Engineering Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-10-14
Anticipated expiration: 2041-05-21
Also published as: CN113293664A

Abstract

The application relates to a large-area weak roadbed reinforcing structure which comprises a geogrid, a gravel layer and a plurality of gravel piles, wherein a positioning piece is arranged on the end wall of each gravel pile, which faces the geogrid, and comprises a positioning square column, a clamping screw rod, a butt plate and a control hand wheel; the end wall of the gravel pile facing the geogrid is provided with a preset groove, the end wall of the positioning square column far away from the direction of the gravel pile is provided with a locking groove, and one end of the clamping screw rod close to the positioning square column is in threaded fit in the locking groove; the butt board sets up in the one end that the location square column direction was kept away from to the joint lead screw, the lateral wall of gravel layer direction is kept away from in geogrid to butt board butt, control hand wheel sets up in the lateral wall that the joint lead screw direction was kept away from to the butt board. This application has effectively ensures geogrid at the intraformational stability in reinforcement, has improved the whole bearing strength and the stable effect of application at the gravel pile top of back up coat.

Description

Large-area weak roadbed reinforcing structure

Technical Field

The application relates to the field of roadbed reinforcement structures, in particular to a large-area weak roadbed reinforcement structure.

Background

The weak subgrade generally refers to a soil foundation layer formed by loose soil such as silt, miscellaneous soil, filling soil and the like. In road construction, because the water content inside the soft foundation is large and the combination tightness between soil layer structures is low, the surface layer of the soft foundation is easy to have uneven settlement, and then the road foundation must be compacted and reinforced when being constructed.

In actual construction, operators mostly adopt technical means such as soil replacement reinforcement, compaction pile reinforcement and deep cement mixing pile to reinforce the weak roadbed. However, for a large-area weak roadbed, operators mostly adopt a means of combining multiple reinforcement methods to ensure the overall stability of the large-area weak roadbed.

The related technology discloses a method for reinforcing a large-area weak roadbed, which comprises the following steps: s100, roadbed compaction replacement: a gravel pile is driven into the weak roadbed, and soft soil is compacted and replaced through the gravel pile, so that the bearing capacity of the soft soil is improved; s200, paving a reinforcing layer: paving a gravel layer on the pile top of the gravel pile to accelerate the consolidation of soft soil; laying geogrids on the gravel layer, and restraining the positions between adjacent gravels through the geogrids; finally, backfilling soil into the geogrid, and forming a reinforcing layer at the top of the gravel pile to further tamp the soft roadbed; s300, pre-burying a reinforcement body: before backfilling, a reinforcement body is pre-embedded on the geogrid, and one end, far away from the broken stone, of the reinforcement body is used for being fixed inside a concrete road which is poured subsequently, so that the integrity of the reinforcement layer and the newly-paved road is improved.

Aiming at the related technologies, the inventor thinks that the broken stone is easy to dissociate to a certain degree under the influence of the uneven settlement acting force of the soft foundation, and the dissociated broken stone is easy to drive the geogrid to displace together, so that the connection tightness of the reinforcing layer and the gravel pile is greatly influenced, and the defects of the whole bearing strength and the application stability of the reinforcing layer are reduced.

Disclosure of Invention

In order to improve the problem that the position stability of geogrid in the reinforced layer is on the low side, this application provides a soft roadbed reinforced structure of large tracts of land.

The application provides a soft roadbed reinforced structure of large tracts of land adopts following technical scheme:

a large-area weak roadbed reinforcing structure comprises a geogrid, a gravel layer and a plurality of gravel piles, wherein the gravel layer is arranged at one end of each gravel pile in the height direction; the end wall of the gravel pile facing the geogrid is provided with a preset groove, and one end, close to the gravel pile, of the positioning square column is arranged in the inner cavity of the preset groove; a locking groove is formed in the end wall of the positioning square column far away from the direction of the gravel pile, and one end, close to the positioning square column, of the clamping screw rod is in threaded fit in the locking groove; the butt board sets up in the one end that the location square column direction was kept away from to the joint lead screw, the lateral wall of gravel layer direction is kept away from in geogrid to butt board butt, control hand wheel sets up in the lateral wall that the joint lead screw direction was kept away from to the butt board.

Through adopting above-mentioned technical scheme, joint lead screw thread is screwed up when locking inslot cavity, the lateral wall that butt joint board and metalling moved towards each other offsets, gland geogrid is stabilized to the butt board, in order to reduce the relative rubble of geogrid and appear dissociating, the phenomenon of migration, and then improved the positional stability and the connection compactness of the relative rubble stake of metalling layer and geogrid, and ensured the positional stability of the relative rubble stake of soil layer of follow-up paving in the geogrid top, the whole bearing strength and the application stability of the back up coat of consolidating in weak subgrade roof have been improved.

Preferably, the positioning square column and the gravel pile are provided with a fixing piece together, and the fixing piece comprises an external coaming and a fixing bolt; the external coaming is arranged on the outer side wall of the positioning square column, and the fixing bolt is used for fixedly connecting the external coaming and the gravel pile.

By adopting the technical scheme, the external coaming increases the contact area of the positioning square column and the gravel pile, and ensures the position stability of the positioning square column relative to the gravel pile; the fixing bolt is fixedly connected with the external coaming and the gravel pile so that the positioning square column is quickly and stably fixedly connected with the gravel pile.

Preferably, the end wall of the gravel pile in the height direction is provided with a settling tank around the periphery of the preset tank, and the external coaming is located in the inner cavity of the settling tank.

Through adopting above-mentioned technical scheme, after the location square column supports into predetermineeing the groove inner chamber, external bounding wall can support into the subsider inner chamber completely, and the subsider has effectively injectd the position of the relative gravel pile of external bounding wall, and then has effectively reduced the relative gravel pile of external bounding wall and has appeared the phenomenon that the pine shakes, moves partially, has improved the joint strength of location square column and gravel pile.

Preferably, the lateral wall that the butt joint lead screw direction was kept away from to the butt plate runs through and is provided with the hole of stepping down, the joint lead screw is close to the end wall of butt joint board direction and is located the hole department of stepping down and is provided with the through-connection hole, the joint lead screw is provided with the concrete jointly with the location square column and waters the piece.

Through adopting above-mentioned technical scheme, operating personnel can pour into the concrete slurry and pour into through the hole of stepping down and lead to hole and locking groove inner chamber, and the concrete slurry is in lead to hole and the consolidation shaping of locking groove inner chamber and water the piece with the common formation concrete, and the concrete waters the piece and has further improved the joint strength of joint lead screw and location square column, and then has further ensured the positional stability of joint lead screw and butt plate relative location square column to further improved geogrid positional stability on the metalling.

Preferably, the abutting plate and the geogrid are provided with abutting pieces together, and the abutting pieces comprise abutting ring plates and clamping bolts; the laminating annular plate is arranged on the side wall, far away from the butt joint plate direction, of the geogrid, and the clamping bolt is used for fixedly connecting the butt joint plate and the laminating annular plate.

Through adopting above-mentioned technical scheme, the laminating crown plate welds in the lateral wall of geogrid towards the metalling to cooperation butt board centre gripping geogrid jointly, behind joint bolt fixed connection laminating crown plate and the butt board, butt board further improves with geogrid's joint strength, and then has further improved geogrid on the metalling position stability.

Preferably, the adjacent positioning square columns are provided with a reinforcing member together, and the reinforcing member comprises a fixed block, a pair of pulling plates, an end plate and a clamping bolt; the end plates are respectively arranged at two ends of the pulling plate in the length direction, the fixing blocks are arranged on the side walls of the two positioning square columns facing each other, guide grooves convenient for the end plates to abut into are formed in the outer side walls of the fixing blocks, and the clamping and fixing bolts are used for fixedly connecting the end plates and the fixing blocks.

Through adopting above-mentioned technical scheme, after the tip board supported the guide way inner chamber, be fixed in between two adjacent location square columns simultaneously to the pulling plate to ensure the joint strength of two adjacent location square columns, and then improved the positional stability of location square column, joint lead screw and butt joint board, ensured the inside tight degree of connection of reinforcement soil layer, improved the whole bearing strength and the application stability who consolidates the soil layer.

Preferably, a plurality of stabilizing plates are arranged on the outer side wall of the opposite pulling plate at intervals.

Through adopting above-mentioned technical scheme, the steadying plate has increased the area of contact to arm-tie and rubble, and then through to providing the supporting force at any time, has increased the connection compactness between adjacent rubble, has reduced the phenomenon that appears dissociating, the migration between adjacent rubble, has ensured the positional stability of rubble to further reduced the rubble and driven geogrid and the phenomenon that the position shifts appears.

Preferably, the gravel pile, the positioning square column and the abutting plate are provided with a stabilizing part together, and the stabilizing part comprises a sleeved arc plate, an extension coaming, a connecting steel cable and a limiting column; the sleeved arc plate and the limiting column are arranged on the end wall of the gravel pile facing the gravel layer, and the extending coaming plate is arranged on the outer side wall of the positioning square column; connecting wire rope length direction's one end with cup joint arc board fixed connection, the lateral wall that extends the bounding wall and keeps away from the gravel pile direction runs through and is provided with the first guiding hole that is convenient for connecting wire rope to pass, the lateral wall that the gravel pile direction was kept away from to the butt joint board runs through and is provided with the second guiding hole that is convenient for connecting wire rope to pass, connecting wire rope keeps away from the one end and the spacing post fixed connection who cup joints the arc board.

Through adopting above-mentioned technical scheme, behind the connecting cable passed first guiding hole and second guiding hole in proper order, can connect simultaneously and cup joint the arc board, extend bounding wall, butt board and spacing post, and then make and produce the interact power between gravel pile, location square column, joint lead screw and the butt board, and then further improved and spread the internal connection compactness and the wholeness in the reinforcement soil layer at gravel pile top.

Preferably, the connecting steel cable and the limiting column are provided with a locking piece together, and the locking piece comprises a bearing ring plate and a locking bolt; the bearing ring plate is arranged at one end of the connecting steel cable far away from the direction of the sleeved arc plate, and the locking bolt is used for fixedly connecting the bearing ring plate and the limiting column.

By adopting the technical scheme, the sleeve ring plate increases the contact area of the connecting steel cable and the limiting column, and improves the positioning stability of the connecting steel cable and the limiting column; the locking bolt can be used for quickly and fixedly connecting the sleeve ring plate and the limiting column, and effectively guaranteeing the connection strength of the connecting steel cable and the limiting column.

In summary, the present application includes at least one of the following beneficial technical effects:

1. one end of the clamping screw rod, which is close to the positioning square column, is screwed tightly in an inner cavity of the locking groove, the abutting plate abuts against the side wall, which faces to the gravel layer, of the abutting plate, so that the geogrid is pressed by the abutting plate, the position stability of the geogrid on the gravel layer is guaranteed, the phenomena that the geogrid is free and moves relative to the gravel layer are effectively reduced, and the overall stability and the bearing strength of a reinforced soil layer at the top of the gravel pile are improved;

2. connecting cable connects simultaneously and cup joints arc board, location square column, butt board and spacing post for cup joint and produce the interact power between arc board, location square column, butt board and the spacing post, and then ensured to pave in the inside connection compactness and the wholeness of the reinforcement soil layer at gravel pile top, and further improved the butt intensity of butt board to geogrid.

Drawings

Fig. 1 is a schematic structural diagram of a large-area weak roadbed reinforcing structure according to an embodiment of the application;

FIG. 2 is an exploded view of the positional relationship of the clamping screw, geogrid and positioning square column;

FIG. 3 is a schematic view of the connection of the connecting cable to the bell crank, extension fence and abutment plate;

FIG. 4 is an exploded view of the positional relationship of the clamping screw rod, the positioning square column and the concrete casting block;

FIG. 5 is an exploded view of the connection of the pull plate, the fixing block and the positioning square column;

fig. 6 is an exploded view of the connection relationship between the connecting cable and the restraining post.

Description of reference numerals: 1. gravel piles; 11. a crushed stone layer; 12. a geogrid; 13. presetting a groove; 14. a settling tank; 2. a positioning member; 21. positioning a square column; 211. a locking groove; 22. clamping a screw rod; 221. a through hole; 222. concrete pouring blocks; 23. a butt joint plate; 231. a hole for abdication; 232. a second guide hole; 24. a control hand wheel; 3. a fixing member; 31. connecting a coaming externally; 32. fixing the bolt; 4. an abutting piece; 41. fitting a ring plate; 42. clamping a bolt; 5. a reinforcement; 51. a fixed block; 511. a guide groove; 52. oppositely pulling the plates; 521. a stabilizing plate; 53. an end plate; 54. clamping and fixing the bolt; 6. a stabilizing member; 61. sleeving an arc plate; 62. extending the enclosing plate; 621. a first guide hole; 63. connecting a steel cable; 64. a limiting post; 7. a locking member; 71. a receiving ring plate; 72. and locking the bolt.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses soft roadbed reinforced structure of large tracts of land. Referring to fig. 1, a large-area weak roadbed reinforcing structure comprises a plurality of gravel piles 1, gravel layers 11 and geogrids 12. The gravel pile 1 is propped into the soft roadbed through a pile driver so as to compact and tamp the soft roadbed. The gravel layer 11 is formed by paving a certain amount of gravel on the end wall of all the gravel piles 1 far away from the soft foundation, and the geogrid 12 is paved on the side wall of the gravel layer 11 far away from the gravel piles 1.

Referring to fig. 1 and 2, a positioning piece 2 is arranged on the side wall of the gravel pile 1 facing the geogrid 12, and the positioning piece 2 comprises a positioning square column 21, a clamping screw rod 22, a butt plate 23 and a control hand wheel 24.

Referring to fig. 3 and 4, the positioning square column 21 is provided to the end wall of the gravel pile 1 facing the geogrid 12 by a fixing member 3, and the fixing member 3 includes a circumscribing coaming 31 and a fixing bolt 32. External bounding wall 31 welds in location square column 21 lateral wall, and gravel pile 1 is provided with towards the end wall of geogrid 12 and predetermines groove 13, predetermines the internal diameter size of groove 13 and the peripheral size looks adaptation of location square column 21. The end wall of the gravel pile 1 facing the geogrid 12 is provided with a settling tank 14 around the periphery of the preset tank 13, and the inner diameter of the settling tank 14 is matched with the outer periphery of the external enclosing plate 31.

Referring to fig. 3 and 4, after the operator completely props the end of the positioning square column 21 close to the gravel pile 1 into the inner cavity of the pre-set groove 13, the external coaming 31 also completely props into the inner cavity of the settling tank 14. An operator can penetrate the rod body of the fixing bolt 32 through the external coaming 31 and screw the rod body in a thread groove preset in the bottom wall of the settling tank 14, so that the external coaming 31 is fixed in the inner cavity of the settling tank 14, and the positioning square column 21 is fixedly connected with the gravel pile 1. When the operator lays the gravel layer 11, the height dimension of the gravel layer 11 is equal to the height dimension of the positioning square column 21.

Referring to fig. 4, the end wall of the positioning square column 21 in the direction away from the gravel pile 1 is provided with a locking groove 211, in this embodiment, the locking groove 211 is a thread groove capable of being in threaded fit with the clamping screw rod 22, and the height dimension of the locking groove 211 is smaller than that of the positioning square column 21.

Referring to fig. 4, the abutting plate 23 is welded to the end wall of the clamping screw 22 far from the positioning square column 21 along the horizontal direction, and the outer circumference of the abutting plate 23 is larger than the outer diameter of the clamping screw 22. Control hand wheel 24 welds perpendicularly in the lateral wall that butt plate 23 kept away from joint lead screw 22 direction, and operating personnel lays geogrid 12 in the lateral wall that gravel layer 11 kept away from gravel pile 1 direction after, and operating personnel can rotate control hand wheel 24 and rotate to twist joint lead screw 22 screw soon in locking groove 211 inner chamber, until butt plate 23 offsets with the lateral wall that gravel layer 11 was towards each other. At this time, the geogrid 12 is pressed against between the gravel layer 11 and the abutment plate 23 to effectively define the position of the geogrid 12 and the gravel.

Referring to fig. 4, a yielding hole 231 is longitudinally penetratingly formed in a side wall of the abutting plate 23 far away from the direction of the clamping screw rod 22, a through hole 221 is longitudinally penetratingly formed in an end wall of the clamping screw rod 22 near the direction of the abutting plate 23, and the through hole 221 and the yielding hole 231 are mutually symmetrical and communicated in inner cavities. After the abutting plate 23 abuts against the side wall of the gravel layer 11 facing each other, an operator can inject concrete slurry into the yielding hole 231, and the inner cavity of the locking groove 211 and the inner cavity of the through hole 221 can be filled with the concrete slurry. The concrete slurry is solidified and formed to form the concrete pouring block 222, and the concrete pouring block 222 further improves the connection strength of the clamping screw rod 22 and the positioning square column 21 so as to improve the abutting strength of the abutting plate 23 to the geogrid 12.

Referring to fig. 2, the abutting plate 23 is provided with an abutting member 4 together with the geogrid 12, and the abutting member 4 includes an abutting ring plate 41 and a snap bolt 42. The attachment ring plate 41 is welded to the side wall of the geogrid 12 facing the gravel layer 11 in the horizontal direction, and after the geogrid 12 is laid on the side wall of the gravel layer 11 far away from the gravel pile 1, one end of the clamping screw rod 22 far away from the direction of the attachment ring plate 23 penetrates through a through hole of the attachment ring plate 41 and is screwed in an inner cavity of the locking groove 211 in a threaded manner. At this time, the abutting plate 23 abuts against the side wall of the attaching ring plate 41 facing each other, and the rod body of the fastening bolt 42 penetrates through the abutting plate 23 and is screwed in a preset thread groove on the outer side wall of the attaching ring plate 41, so that the abutting plate 23 is fixedly connected with the attaching ring plate 41, and the position stability of the geogrid 12 is further improved.

Referring to fig. 3 and 5, the adjacent positioning square columns 21 are provided with the reinforcing members 5 together, the reinforcing members 5 are located inside the gravel layer 11, and the reinforcing members 5 comprise fixing blocks 51, counter-pulling plates 52, end plates 53 and clamping bolts 54. The fixing block 51 is welded to the side walls of the two adjacent positioning square columns 21 facing each other in the longitudinal direction, the end plates 53 are welded to both ends of the pulling plate 52 in the longitudinal direction, and one end of each end plate 53 facing the fixing block 51 extends to the outside of the pulling plate 52. The side wall of the fixing block 51 facing the end plate 53 is provided with a guide groove 511, and the inner diameter of the guide groove 511 is matched with the outer circumference of the end plate 53.

Referring to fig. 5, an operator may push one end of the end plate 53 close to the fixed block 51 into the cavity of the guide slot 511, so that the opposite pulling plate 52 is simultaneously positioned on the outer side walls of two fixed blocks 51, so as to simultaneously opposite pull two adjacent positioning square columns 21. An operator can penetrate the rod body of the clamping bolt 54 through the end plate 53 and screw the rod body into a thread groove preset in the bottom wall of the guide groove 511, so that the end plate 53 is fixedly connected with the fixed block 51, the opposite pulling plate 52 is fixedly connected between the two adjacent positioning square columns 21, the position stability of the positioning square columns 21, the clamping screw rod 22 and the abutting plate 23 is improved, and the limiting stability of the abutting plate 23 on the geogrid 12 is further improved.

Referring to fig. 5, a plurality of stabilizing plates 521 are arranged on the outer side wall of the opposite pulling plate 52 at intervals along the longitudinal direction, and the stabilizing plates 521 are used for increasing the contact area between the opposite pulling plate 52 and the crushed stones, so as to increase the difficulty of the adjacent crushed stones in dissociation and deflection, and further improve the position stability of the geogrid 12 relative to the crushed stone layer 11.

Referring to fig. 1 and 3, the gravel pile 1, the positioning square column 21 and the abutting plate 23 are provided with a stabilizing member 6, and the stabilizing member 6 comprises a sleeved arc plate 61, an extending enclosing plate 62, a connecting steel cable 63 and a limiting column 64. In this embodiment, the connecting steel cable 63 is an aircraft carrier intercepting cable, the limiting column 64 is a solid steel column, and one end of the limiting column 64 away from the gravel pile 1 is located above the gravel layer 11. Spacing post 64 and cup joint cambered plate 61 all weld in the end wall of gravel pile 1 towards geogrid 12, extend bounding wall 62 and weld in location square column 21 lateral wall along the horizontal direction, extend bounding wall 62 and be located gravel layer 11 inside, and extend the bounding wall 62 and keep away from the lateral wall of gravel pile 1 direction and be provided with a plurality of first guiding holes 621 along vertically running through. The abutting plate 23 is provided with a plurality of second guide holes 232 penetrating in the longitudinal direction from the side wall far away from the gravel pile 1.

Referring to fig. 3, an operator may adjust one end of the connecting cable 63 in the length direction to the outer edge of the socket arc plate 61, then pass one side of the other end of the connecting cable 63 in the length direction through the first guide hole 621 and the second guide hole 232, and finally, fixedly connect one end of the connecting cable 63 far away from the socket arc plate 61 with the limit post 64 through the locking member 7. At this moment, the connecting steel cable 63 is simultaneously connected in series with the gravel pile 1, the extending coaming 62, the abutting plate 23 and the limiting column 64 so as to further improve the position stability of the abutting plate 23 relative to the positioning square column 21 and the gravel pile 1, and further improve the position stability of the geogrid 12 on the gravel layer 11.

Referring to fig. 6, the locking member 7 includes a receiving ring plate 71 and a locking bolt 72, and the receiving ring plate 71 is integrally formed at an end of the connecting cable 63 away from the sleeving arc plate 61. After the connecting steel cable 63 is sequentially connected with the extending coaming 62 and the abutting plate 23, an operator can wind the connecting steel cable 63 on the outer edge of the limiting column 64, abut the bearing ring plate 71 on the end wall of the limiting column 64 far away from the direction of the gravel pile 1, and finally, the rod body of the locking bolt 72 penetrates through the through hole of the bearing ring plate 71 and is screwed in the preset thread groove of the end wall of the limiting column 64 in the height direction in a threaded manner, so that the bearing ring plate 71 is fixedly connected with the limiting column 64, and the connecting strength of the connecting steel cable 63 and the limiting column 64 is further ensured.

The implementation principle of the large-area weak roadbed reinforcing structure provided by the embodiment of the application is as follows: after an operator supports one end, close to the gravel pile 1, of the positioning square column 21 into the inner cavity of the preset groove 13, the external coaming 31 completely supports into the inner cavity of the settling tank 14, and the operator is fixedly connected with the external coaming 31 and the gravel pile 1 through the fixing bolt 32. Then, the operator sleeves one end of the connecting cable 63 in the length direction on the outer edge of the sleeving arc plate 61, and then passes the other end of the connecting cable 63 in the length direction through the second guiding hole 232 for standby.

The operator will lay all the gravel piles 1 on top of each other at any time to form the gravel layer 11. Then, the operator screws one end of the clamping screw rod 22 close to the positioning square column 21 into the inner cavity of the locking groove 211 until the abutting plate 23 abuts against the side wall of the geogrid 12 facing each other. Then, the operator fixedly connects the joint ring plate 41 and the abutting plate 23 by the clamping bolt 42, then passes the connecting steel cable 63 through the first guide hole 621 and winds the connecting steel cable around the outer edge of the limiting post 64, and finally, fixedly connects the receiving ring plate 71 and the limiting post 64 by the locking bolt 72, so that the connecting steel cable 63 is fixedly connected with the limiting post 64.

An operator can inject concrete slurry into the inner cavity of the abdicating hole 231, so that the inner cavity of the locking groove 211 and the inner cavity of the through connecting hole 221 are filled with the concrete slurry to form the concrete pouring block 222 fixedly connecting the clamping screw rod 22 and the positioning square column 21. At this moment, butt geogrid 12 is stabilized to butt board 23 to effectively reduce geogrid 12 and appear dissociating, the phenomenon of prejudicial motion, and then effectively ensured the relative gravel pile 1's of soil layer of rubble layer 11 and follow-up paving in geogrid 12 top connection compactness and bearing strength, application stability.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a soft road bed reinforced structure of large tracts of land, includes geogrid (12), rubble layer (11) and many rubble piles (1), rubble layer (11) set up in the one end of all rubble piles (1) direction of height, geogrid (12) set up in rubble layer (11) and keep away from the lateral wall of rubble pile (1) direction, its characterized in that: a positioning piece (2) is arranged on the end wall, facing the geogrid (12), of the gravel pile (1), and the positioning piece (2) comprises a positioning square column (21), a clamping connection screw rod (22), a butt plate (23) and a control hand wheel (24); a preset groove (13) is formed in the end wall, facing the geogrid (12), of the gravel pile (1), and one end, close to the gravel pile (1), of the positioning square column (21) is arranged in the inner cavity of the preset groove (13); a locking groove (211) is formed in the end wall of the positioning square column (21) far away from the gravel pile (1), and one end, close to the positioning square column (21), of the clamping screw rod (22) is in threaded fit in the locking groove (211); the abutting plate (23) is arranged at one end, away from the direction of the positioning square column (21), of the clamping screw rod (22), the abutting plate (23) abuts against the side wall, away from the direction of the gravel layer (11), of the geogrid (12), and the control hand wheel (24) is arranged on the side wall, away from the direction of the clamping screw rod (22), of the abutting plate (23); the side wall of the butt joint plate (23) far away from the direction of the clamping screw rod (22) is provided with a yielding hole (231) in a penetrating mode, the clamping screw rod (22) is close to the end wall of the butt joint plate (23) in the direction and provided with a communicating hole (221) at the position of the yielding hole (231), and the clamping screw rod (22) and the positioning square column (21) are provided with a concrete pouring block (222) together; an operator injects concrete slurry into the abdicating hole (231), and the concrete slurry is solidified and formed to form a concrete pouring block (222); the adjacent positioning square columns (21) are provided with reinforcing members (5) together, and each reinforcing member (5) comprises a fixing block (51), a counter-pulling plate (52), an end plate (53) and a clamping and fixing bolt (54); the end plates (53) are respectively arranged at two ends of the opposite pull plate (52) in the length direction, the fixing blocks (51) are arranged on the mutually-oriented side walls of the two positioning square columns (21), the outer side walls of the fixing blocks (51) are provided with guide grooves (511) which are convenient for the end plates (53) to abut into, and the clamping bolts (54) are used for fixedly connecting the end plates (53) and the fixing blocks (51); an operator penetrates the rod body of the clamping bolt (54) through the end plate (53) and screws the rod body into a threaded groove preset in the bottom wall of the guide groove (511) so as to fixedly connect the end plate (53) with the fixed block (51).

2. The large-area weak roadbed reinforcing structure as claimed in claim 1, wherein: the positioning square column (21) and the gravel pile (1) are provided with a fixing piece (3) together, and the fixing piece (3) comprises an external coaming (31) and a fixing bolt (32); the external coaming (31) is arranged on the outer side wall of the positioning square column (21), and the fixing bolt (32) is used for fixedly connecting the external coaming (31) and the gravel pile (1).

3. The large-area weak roadbed reinforcing structure as claimed in claim 2, wherein: the end wall of gravel pile (1) direction of height is provided with subsider (14) around presetting groove (13) periphery, external bounding wall (31) are located subsider (14) inner chamber.

4. The large-area weak roadbed reinforcing structure as claimed in claim 1, wherein: the abutting plate (23) and the geogrid (12) are provided with abutting pieces (4) together, and each abutting piece (4) comprises an abutting ring plate (41) and a clamping bolt (42); laminating crown plate (41) set up in geogrid (12) and keep away from the lateral wall of butt joint board (23) direction, joint bolt (42) are used for fixed connection butt joint board (23) and laminating crown plate (41).

5. The large-area weak roadbed reinforcement structure of claim 1, wherein: a plurality of stabilizing plates (521) are arranged on the outer side wall of the pull plate pair (52) at intervals.

6. The large-area weak roadbed reinforcing structure as claimed in claim 1, wherein: the gravel pile (1), the positioning square column (21) and the abutting plate (23) are provided with a stabilizing part (6) together, and the stabilizing part (6) comprises a sleeved arc plate (61), an extending enclosing plate (62), a connecting steel cable (63) and a limiting column (64); the sleeved arc plate (61) and the limiting column (64) are arranged on the end wall, facing the gravel layer (11), of the gravel pile (1), and the extending coaming (62) is arranged on the outer side wall of the positioning square column (21); connecting wire rope (63) length direction's one end with cup joint cambered plate (61) fixed connection, extend bounding wall (62) and keep away from lateral wall of gravel pile (1) direction and run through first guiding hole (621) that are provided with be convenient for connecting wire rope (63) and pass, the lateral wall that gravel pile (1) direction was kept away from in butt plate (23) runs through and is provided with second guiding hole (232) that are convenient for connecting wire rope (63) and pass, connecting wire rope (63) are kept away from the one end and spacing post (64) fixed connection that cup joint cambered plate (61).

7. The large-area weak roadbed reinforcement structure of claim 6, wherein: the connecting steel cable (63) and the limiting column (64) are provided with a locking piece (7) together, and the locking piece (7) comprises a bearing ring plate (71) and a locking bolt (72); the bearing ring plate (71) is arranged at one end of the connecting steel cable (63) far away from the direction of the sleeving arc plate (61), and the locking bolt (72) is used for fixedly connecting the bearing ring plate (71) and the limiting column (64).