CN214613372U

CN214613372U - New and old road bed links up structure

Info

Publication number: CN214613372U
Application number: CN202120510872.8U
Authority: CN
Inventors: 胡志恒; 姜志平; 赵文雪
Original assignee: Hangzhou Highway Engineering Supervision & Consultant Co
Current assignee: Hangzhou Highway Engineering Supervision & Consultant Co
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-11-05
Anticipated expiration: 2031-03-10

Abstract

The utility model belongs to the technical field of the technique of road bed construction and specifically relates to a new and old road bed links up structure is related to, and it includes old road bed and new road bed, old road bed and new road bed link up the department and are formed with the step, still include prefabricated platform, prefabricated platform is buried underground in new road bed, prefabricated platform bottom is equipped with the anchor pile, prefabricated platform level runs through and has seted up the horizontal hole, wear to be equipped with the horizon bar in the horizontal hole, in the step was worn to establish by horizon bar one end, just welded connection has the drive handle in the new road bed is worn to establish by the horizon bar other end, be formed with the clearance between horizontal hole and the horizon bar, prefabricated platform has seted up the slip casting hole from the top, slip casting hole intercommunication clearance, it has the strengthening layer to fill in proper order in slip casting hole and the clearance. The prefabricated platform can improve the structural strength of old road bed and new road bed linking department, and the connection performance between new road bed, old road bed and the prefabricated platform can be improved to the horizontal pole, and then makes this application have the effect of improving people's use road.

Description

New and old road bed links up structure

Technical Field

The application relates to the technical field of roadbed construction, in particular to a new roadbed and old roadbed connection structure.

Background

The roadbed is a foundation of a track or a road surface and is an earth structure formed by excavation or filling. Nowadays, need to lengthen the road bed on original road bed basis, and then lengthen the highway to satisfy people to the user demand of highway. However, the joints of the old and new roadbeds often have cracks due to weak structures, and further normal use of roads is affected.

SUMMERY OF THE UTILITY MODEL

In order to improve new and old road bed joint and produce the crack because of the structure is weak, and then improve the normal use of new and old road junction, this application provides a new and old road bed joint structure.

The application provides a new and old road bed links up structure adopts following technical scheme:

the utility model provides a new and old road bed links up structure, it includes old road bed and new road bed, old road bed and new road bed link up the department and are formed with the step, still include prefabricated platform, prefabricated platform is buried underground in new road bed, prefabricated platform bottom is equipped with the anchor pile, prefabricated platform level runs through and has seted up the horizontal hole, wear to be equipped with the horizon bar in the horizontal hole, the horizon bar one end is worn to establish in the step, the horizon bar other end is worn to establish in the new road bed and welded connection has the drive handle, be formed with the clearance between horizontal hole and the horizon bar, prefabricated platform has seted up the slip casting hole from the top, slip casting hole intercommunication clearance, it has the strengthening layer to fill in proper order in slip casting hole and the clearance.

Through adopting above-mentioned technical scheme, earlier be the step form earlier on old roadbed top-down and repairment, the back clearance flattening new roadbed portion's bed, support tight step lower part with the prefabricated platform and place the bed top after the flattening. And penetrating the horizontal rod into the step from the horizontal hole by using the driving handle, then filling joint filling mortar into the grouting hole, and forming a reinforcing layer in the grouting hole and the gap by using the joint filling mortar. The prefabricated platform can improve the structural strength of old road bed and new road bed linking department, and the connection performance between new road bed, old road bed and the prefabricated platform can be improved to the horizon bar, and then makes the structural performance between old road bed and the new road bed improve, finally makes this scheme have because of improving the structural performance of old road bed and new road bed linking department and reduce and produce the crack, and then improves the effect that people used the road.

Optionally, one end of the horizontal rod, which is positioned in the old roadbed, is provided with a threaded drill bit.

Through adopting above-mentioned technical scheme, utilize the drive handle to rotate the horizon bar, under the effect of screw drill bit, the horizon bar conveniently moves to the step internal motion to conveniently connect old road bed and prefabricated platform.

Optionally, the peripheral wall of the horizontal rod is formed with an external thread.

Through adopting above-mentioned technical scheme, the external screw thread can cooperate the work of thread drill bit on the one hand, and then improves the efficiency that the horizon bar bored into the step, and external screw thread on the other hand can improve the area of contact between horizon bar and old roadbed, horizon bar and reinforcement layer, horizon bar and the new roadbed, and then improves the connection performance between horizon bar, new roadbed, old roadbed and the prefabricated platform.

Optionally, the new roadbed comprises a geogrid layer, a first clay layer, a second clay layer and a stone layer, the geogrid layer, the first clay layer, the stone layer and the second clay layer are sequentially laid from bottom to top on the top of the foundation bed, and the driving handle is located in the stone layer.

Through adopting above-mentioned technical scheme, the geogrid layer is laid and is formed by utilizing geosynthetic material, and the geogrid layer has the advantage that improves new roadbed bearing capacity, and first clay layer, lump stone layer and second clay layer are used for improving the stability of prefabricated platform and new roadbed inner structure.

Optionally, the new roadbed further comprises a broken stone cushion layer and a lime clay layer, the broken stone cushion layer is laid on the top of the second clay layer, and the lime clay layer is laid on the top of the broken stone cushion layer.

Through adopting above-mentioned technical scheme, the rubble bed course can decompose and transmit the load that comes from vertical decurrent uniformly, and the lime clay layer is made for lime mixed clay and has good structural strength to improve the inside structural performance of new road bed.

Optionally, a sand layer is laid on the top of the lime clay layer, and a steel mesh is laid in the sand layer.

Through adopting above-mentioned technical scheme, the sand layer is that the sand is laid the compaction and is formed and have good structural strength, and built-in reinforcing bar net piece further strengthens sand layer structural strength, further improves the inside structural performance of new road bed.

Optionally, a ceramsite layer and an asphalt layer are sequentially paved on the top of the sand soil layer from bottom to top, and the asphalt layer is lapped on the top of the old roadbed.

By adopting the technical scheme, the ceramsite layer and the asphalt layer have a waterproof effect, so that water seepage from the joint of the old roadbed and the new roadbed to the lower part is reduced, and further cracks generated by water seepage at the joint of the old roadbed and the new roadbed are weakened.

Optionally, the two sides of the prefabricated platform are respectively and fixedly provided with a reinforcing platform, and the top of the reinforcing platform is flush with the top of the old roadbed.

Through adopting above-mentioned technical scheme, strengthen the platform and can improve the wholeness ability of prefabricated platform, finally improve the wholeness ability of old road bed and new road bed junction.

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

1. the prefabricated platform can improve the structural strength of the joint of the old roadbed and the new roadbed, and the horizontal rods can improve the connection performance among the new roadbed, the old roadbed and the prefabricated platform, so that the scheme has the effect of reducing cracks due to the improvement of the structural performance of the joint of the old roadbed and the new roadbed;

2. the horizontal rod is rotated by using the driving handle, and the thread drill moves towards the inside of the step;

3. the reinforcing table can improve the overall performance of the prefabricated table.

Drawings

FIG. 1 is a schematic top view of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is an enlarged schematic view of the structure at line B in fig. 2.

Description of reference numerals: 1. old roadbed; 2. a new roadbed; 21. a geogrid layer; 22. a first clay layer; 23. a second clay layer; 24. a lump stone layer; 25. a gravel cushion layer; 26. a lime clay layer; 27. a sandy soil layer; 271. reinforcing mesh sheets; 28. a ceramic layer; 29. an asphalt layer; 3. a step; 31. a first vertical surface; 32. a vertical surface II; 33. a third vertical surface; 34. a first transverse surface; 35. a second transverse surface; 4. a prefabricating platform; 41. a horizontal hole; 42. grouting holes; 43. a horizontal bar; 44. a drive handle; 45. a thread drill bit; 46. a reinforcing layer; 5. anchoring piles; 6. a reinforcing table; 7. and (4) a foundation bed.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses new old road bed 1 links up structure, refer to fig. 1, fig. 2, and it includes old road bed 1, new road bed 2, step 3, prefabricated platform 4, anchor pile 5 and reinforcing platform 6, and old road bed 1 is used for laying at the top of foundation bed 7 with new road bed 2. The step 3 is formed at the joint of the old roadbed 1 and the new roadbed 2, the step 3 is in a ladder shape, the prefabricated platform 4 is of a reinforced concrete structure, the width of the prefabricated platform 4 is consistent with that of the old roadbed 1, and the bottom of the prefabricated platform 4 is lower than that of the old roadbed 1. Anchor piles 5 are of a reinforced concrete structure and are a plurality of, the anchor piles 5 are arrayed along the length direction and the width direction of the bottom of the prefabricated platform 4 at even intervals, the top of any anchor pile 5 is fixedly connected to the bottom of the prefabricated platform 4, and the bottom of any anchor pile 5 is used for being fixedly buried in a foundation bed 7. Reinforcing platform 6 is right angle trapezoidal form, and reinforcing platform 6 has two, and two reinforcing platforms 6 are reinforced concrete structure, and reinforcing platform 6 relative right angle face lateral wall is fixed connection respectively in 4 lateral walls of prefabricated platform, and 2 top overlap joints of new road bed are laid in 1 top of old road bed. The anchor piles 5 improve the structural performance of the prefabricated platform 4 and the foundation bed 7, the prefabricated platform 4 improves the structural performance between the old roadbed 1 and the new roadbed 2, and further improves the structural performance of the joint of the old roadbed 1 and the new roadbed 2 so as to improve the probability of cracks generated at the joint of the old roadbed 1 and the new roadbed 2 due to weak structure.

Referring to fig. 2 and 3, the step 3 includes a first vertical surface 31, a second vertical surface 32, a third vertical surface 33, a first transverse surface 34 and a second transverse surface 35, wherein the first vertical surface 31, the first transverse surface 34, the second vertical surface 32, the second transverse surface 35 and the third vertical surface 33 are arranged in a step shape and are sequentially and vertically connected end to end. The prefabricating platform 4 is provided with a plurality of horizontal holes 41 from one side of the new roadbed 2 to one side of the old roadbed 1 in a penetrating manner, and the horizontal holes 41 are uniformly distributed at intervals along the width direction of the first vertical surface 31; the horizontal holes 41 are also evenly distributed along the width direction of the second vertical surface 32 at intervals. Run through from prefabricated 4 tops of platform to prefabricated 4 bottoms of platform and seted up slip casting hole 42, slip casting hole 42 has a plurality ofly, and slip casting hole 42 is arranged along the even interval of old roadbed 1 width direction, and two horizontal holes 41 of interval about arbitrary slip casting hole 42 all communicates in proper order.

The horizontal rods 43 penetrate through any horizontal hole 41, one end of any horizontal rod 43 is fixedly connected with a threaded drill bit 45, the other end of any horizontal rod 43 is fixedly connected with a driving handle 44, and the driving handle 44 is Z-shaped. A thread drill bit 45 at the end part of any lower horizontal rod 43 penetrates through the first vertical surface 31, and a driving handle 44 at the end part of any lower horizontal rod 43 is positioned in the new roadbed 2; the thread drill bit 45 at the end of any upper horizontal rod 43 is arranged in the vertical plane two 32 in a penetrating way, and the driving handle 44 at the end of any upper horizontal rod 43 is arranged in the new roadbed 2. The end parts of the horizontal rods 43 with the threaded drill bits 45 are sequentially rotated to penetrate into the corresponding horizontal holes 41 and the old roadbed 1 by utilizing the driving handles 44, gaps are formed between the horizontal rods 43 and the corresponding horizontal holes 41, joint filling mortar is filled in the grouting holes 42, and reinforcing layers 46 are formed in the grouting holes 42 and the gaps, so that the connection performance between the horizontal rods 43 and the prefabricating platform 4 is improved.

The new roadbed 2 comprises a geogrid layer 21, a first clay layer 22, a second clay layer 23, a stone layer 24, a broken stone cushion layer 25, a lime clay layer 26, a sand layer 27, a ceramsite layer 28 and an asphalt layer 29, wherein the geogrid layer 21 is formed by laying geogrids, the geogrids are made of geosynthetic materials, and square or rectangular polymer mesh materials are formed by stretching, so that the geogrids have high bearing capacity in the longitudinal and transverse directions.

The geogrid layer 21 is laid on the top of the foundation bed 7 and is connected to one side, far away from the vertical surface I31, of the prefabricated platform 4 in an abutting mode; the first clay layer 22 is laid on the top of the geogrid layer 21, and the first clay layer 22 is connected to one side, far away from the vertical face I31, of the prefabricating platform 4 in an abutting mode. The first clay layer 22 is formed by paving and compacting clay, which can be obtained from local resources, and is an economical material, and the clay can be closely connected with the geogrid layer 21. The bottom of the block stone layer 24 is sequentially laid on the top of the first clay layer 22 and the top of the first transverse face 34, the block stone layer 24 positioned on the top of the first clay layer 22 is tightly connected to one side, away from the old roadbed 1, of the prefabricated platform 4, and meanwhile, the block stone layer 24 positioned on the top of the first transverse face 34 is tightly connected to the second vertical face 32. One end of the horizontal rod 43 far away from the old roadbed 1 is positioned in the block stone layer 24, the horizontal rods 43 between the second vertical surface 32 and the prefabricated platform 4 are positioned in the block stone layer 24, and the top of the block stone layer 24 is flush with the top of the prefabricated platform 4. The block stone layer 24 is formed by throwing block stones, and the block stones have excellent strength so as to improve the internal structure performance of the new roadbed 2.

The second clay layer 23, the broken stone cushion layer 25, the lime clay layer 26, the sand layer 27, the ceramsite layer 28 and the asphalt layer 29 are sequentially laid from bottom to top on the top of the stone layer 24, the second clay layer 23 is formed by clay laying and compacting, gaps exist inside the stone layer 24, and the second clay layer 23 can be used for filling the gaps so as to improve the structural performance of the stone layer 24. The rubble layer is laid for the rubble and forms, and the rubble has the ability of decomposing the transmission vertical load, and the load that bears at second clay layer 23 is applyed in even regulation to the structure of protection rubble layer below. The lime clay layer 26 is made of lime mixed clay, and the structural strength of the clay layer can be effectively improved. The sandy soil layer 27 is formed by paving and compacting sandy soil, the performance of the sandy soil is superior to that of clay, meanwhile, a steel bar net piece 271 is buried in the sandy soil layer 27, and the structural performance of the sandy soil layer 27 is further improved by the steel bar net piece 271, so that the overall performance between the old roadbed 1 and the new roadbed 2 is further improved. The ceramsite layer 28 is formed by paving and compacting ceramsite, the asphalt layer 29 is formed by paving asphalt slag, the ceramsite has excellent strength performance and waterproof performance, and the asphalt slag also has waterproof performance, so that the waterproof performance of the joint of the new foundation and the old foundation is improved together, and the collapse of the joint of the old foundation 1 and the new foundation 2 caused by water seepage is weakened. Meanwhile, the bottom of the asphalt layer 29 is flush with the top of the old roadbed 1, the bottom of one side of the asphalt layer 29 is laid towards the old roadbed 1 in a slope shape, and the bottom of the other side of the asphalt layer 29 is laid towards the new roadbed 2 in a slope shape, so that the connection performance and the waterproof performance of the top of the joint of the old roadbed 1 and the new roadbed 2 are further improved, and the structural performance of the joint of the old roadbed 1 and the new roadbed 2 is improved.

The implementation principle of the embodiment of the application is as follows:

firstly, finishing the joints of the old roadbed 1 into a step shape, and then cleaning and leveling the top of the foundation bed 7 corresponding to the new roadbed 2;

using the step two, sequentially arranging the prefabricating platform 4 and the reinforcing platform 6 on one side, close to the new roadbed 2, of the old roadbed 1, and enabling the prefabricating platform 4 to tightly abut against the vertical surface I31;

thirdly, laying the geogrid layer 21 and the first clay layer 22 in sequence, then sequentially penetrating the horizontal rods 43 into the old roadbed 1 from the horizontal holes 41 by using the driving handles 44, and then conveying joint filling mortar into the grouting holes 42;

finally, a stone block layer 24, a second clay layer 23, a gravel cushion layer 25, a lime clay layer 26, a sand layer 27, a ceramsite layer 28 and an asphalt layer 29 are sequentially laid.

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

Claims

1. A new and old road bed (1) linking structure comprises an old road bed (1) and a new road bed (2), wherein a step (3) is formed at the joint of the old road bed (1) and the new road bed (2), and the new and old road bed linking structure is characterized in that: still include prefabricated platform (4), prefabricated platform (4) are buried underground in new road bed (2), prefabricated platform (4) bottom is equipped with anchor pile (5), prefabricated platform (4) level runs through and has seted up horizontal hole (41), wear to be equipped with horizon bar (43) in horizontal hole (41), in horizontal bar (43) one end is worn to establish step (3), in horizon bar (43) other end is worn to establish and is had drive handle (44) in new road bed (2), be formed with the clearance between horizon bar (41) and horizon bar (43), prefabricated platform (4) have been seted up slip casting hole (42) from the top, slip casting hole (42) intercommunication clearance, it has layer (46) to reinforce in proper order in slip casting hole (42) and the clearance.

2. A new and old roadbed (1) connection structure according to claim 1, characterized in that: one end of the horizontal rod (43) positioned in the old roadbed (1) is provided with a threaded drill bit (45).

3. A new and old roadbed (1) connection structure according to claim 2, characterized in that: the peripheral wall of the horizontal rod (43) is provided with an external thread.

4. A new and old roadbed (1) connection structure according to claim 1, characterized in that: new road bed (2) include geogrid layer (21), first clay layer (22), second clay layer (23) and stone layer (24), geogrid layer (21), first clay layer (22), stone layer (24) and second clay layer (23) are laid from beddings (7) top from bottom to top in proper order, and driven handle (44) are located stone layer (24).

5. A new and old roadbed (1) connection structure according to claim 4, characterized in that: the novel roadbed (2) further comprises a broken stone cushion layer (25) and a lime clay layer (26), wherein the broken stone cushion layer (25) is laid on the top of the second clay layer (23), and the lime clay layer (26) is laid on the top of the broken stone cushion layer (25).

6. A connection structure of new and old road foundations (1) according to claim 5, characterized in that: a sand layer (27) is laid on the top of the lime clay layer (26), and a steel bar net piece (271) is laid in the sand layer (27).

7. A connection structure of new and old road foundations (1) according to claim 6, characterized in that: the sand layer (27) top has laid ceramsite layer (28) and pitch layer (29) from bottom to top in proper order, pitch layer (29) overlap joint in old road bed (1) top.

8. A new and old roadbed (1) connection structure according to claim 1, characterized in that: and reinforcing platforms (6) are respectively fixedly arranged on two sides of the prefabricated platform (4), and the tops of the reinforcing platforms (6) are flush with the tops of the old roadbed (1).