CN217678394U - Road structure applied above subway - Google Patents

Abstract

The utility model belongs to the technical field of road design and specifically relates to a be applied to road structure of subway top and specifically relates to a road structure, it includes the road surface structural layer, the below of road surface structural layer is equipped with foam light soil layer, be equipped with a plurality of reinforcement piles in the foam light soil. The foam light soil layer is a novel engineering filler with light weight and excellent mechanical property, has stronger loading capacity, and can effectively avoid the phenomenon of foundation settlement. The arrangement of the reinforcing piles can improve the connection strength between the foamed light soil layer and other layers. The combination of foam light soil layer and reinforced pile compares in traditional pile sand layer joint concrete material, has strengthened subway top foundation structure's stability more effectively.

Description

Road structure applied above subway

Technical Field

The application relates to the field of road design, in particular to a road structure applied to the upper portion of a subway.

Background

Along with the continuous deepening of urbanization, the construction of subways is accelerated in cities, the subways become one of important transportation tools for people to go out, and meanwhile, the situation that the subways are crossed on newly repaired roads in the cities is more and more, so that the structure of the roads above the subways plays a key role in the safe operation of the subways. If road engineering is built above the subway, the sand piling layer is adopted to joint the concrete material, which is the most common pouring mode for the subway. Aiming at the related technologies, the inventor thinks that the joint concrete material of the sand piling layer can form a roadbed structure with certain thickness and density, and provides a stable and safe tunnel structure for the subway, but when the load on the subway surface is overlarge, the subway tunnel can generate additional stress, the phenomenon of foundation settlement easily occurs on the ground, and great potential safety hazard is generated on the operation safety of the subway.

SUMMERY OF THE UTILITY MODEL

In order to improve subway tunnel structure's stability, this application provides a road structure who is applied to subway top.

The application provides a pair of be applied to road structure above subway adopts following technical scheme:

the utility model provides a be applied to road structure above subway, includes the road surface structural layer, the bottom of road surface structural layer is equipped with foam light soil layer, be equipped with a plurality of anchor piles in the foam light soil layer.

By adopting the technical scheme, the foam light soil layer is a novel engineering filler with light dead weight, high strength and stable performance, and is laid under the pavement structure layer to replace the original sand piling layer to be jointed with a concrete roadbed layer, so that the load effect on the subway tunnel can be reduced, the stability of a roadbed structure above the subway is enhanced, and the phenomenon of foundation settlement when the load is overlarge is avoided. The reinforcing piles are arranged in the foam light soil layer, so that the connection strength inside the foam light soil layer is improved, and the stability of the foam light soil layer is improved.

In a specific implementation mode, a reinforced concrete layer is arranged between the pavement structure layer and the foamed light soil layer, a waterproof geomembrane is arranged between the reinforced concrete layer and the foamed light soil layer, and a galvanized wire netting is arranged above the waterproof geomembrane.

Through adopting above-mentioned technical scheme, the setting on reinforced concrete layer has improved the mechanical strength of road surface structural layer, is of value to road structure's stability. The waterproof geomembrane is arranged on the foam light soil layer, most of accumulated water can be intercepted and discharged to the outside to a certain degree, the stability of the structure of the foam light soil layer is enhanced, and the waterproof geomembrane has excellent mechanical property and strong strain force and is suitable for settlement engineering with uneven geology. The setting of zinc-plated wire netting can reduce the removal of waterproof geomembrane, helps improving the stability of waterproof geomembrane.

In a specific implementation mode, a gravel layer is arranged below the foamed light soil layer, a holding groove is formed in the top surface of the gravel layer, and first geogrids are arranged on two sides of the gravel layer. And a composite geomembrane is arranged between the gravel layer and the foam light soil layer, and the bottom end of the reinforcing pile is positioned above the composite geomembrane.

Through adopting above-mentioned technical scheme, the intensity of ground can be improved in the setting of metalling, and the holding tank setting can reduce the removal on foam light soil layer, and then has strengthened the stability on foam light soil layer. Set up first geogrid in rubble layer both sides, can reduce the removal of rubble to improve the stability of rubble layer. Set up compound geomembrane at rubble layer top, can reduce the removal of rubble, the stability of reinforcing foam light soil layer and rubble layer. The bottom of each reinforcing pile is arranged above the composite geomembrane, so that the connection strength between the foam light soil layer and the gravel layer can be enhanced.

In a particular embodiment, the composite geomembrane comprises a filament geotextile bonded beneath a plastic film and a plastic film.

Through adopting above-mentioned technical scheme, long filament geotechnological cloth has good mechanical properties and anti deformability, and the plastic film has good waterproof performance, and long filament geotechnological cloth has formed the compound geomembrane that has existing straining force and waterproof function again with the plastic film combination, sets up compound geomembrane at the metalling, can improve the stability of metalling, can effectively reduce the metalling and subside the phenomenon and take place.

In a specific practical implementation mode, a grouting reinforcement layer is arranged below the gravel cushion layer, a second geogrid is arranged between the gravel layer and the grouting reinforcement layer, a plurality of connecting buckles are arranged on one side, close to the second geogrid, of the first geogrid, and the first geogrid and the second geogrid are connected through the connecting buckles.

Through adopting above-mentioned technical scheme, when setting up the slip casting back up coat, need subaerial pore-forming, in will slip casting thick liquid pours into the downthehole into again, the thick liquid passes through the crack of pressure transfer underground, can further consolidate the fracture layer to slip casting back up coat's stability and intensity have been improved. The second geogrid is arranged to reduce movement of broken stones in the gravel layer, and the connecting buckles are arranged to effectively connect the first geogrid and the second geogrid together, so that the integrity and the strength of the gravel layer are improved.

In a specific embodiment, the connecting buckle comprises a connecting plate and a buckle head plate, the connecting plate is provided with a plurality of clamping ports, and the buckle head plate is provided with a plurality of clamping protrusions.

Through adopting above-mentioned technical scheme, the joint interface that sets up on the connecting plate uses with protruding supporting, can closely fix first geogrid and second geogrid together, during the dismantlement, only needs to take out the joint arch from the joint interface, and this process convenient operation is safe again.

In a specific implementation mode, clay slopes are arranged on two sides of the foam light soil layer, the top ends of the clay slopes and the top end of the pavement structure layer are located on the same plane, rigid plastic nets are arranged on the clay slopes, and the clay slopes are located above the gravel layers.

Through adopting above-mentioned technical scheme, be equipped with the clay slope in foam light soil layer both sides, can alleviate the rainwater and to the impact wear of road surface structural layer, reinforced concrete layer and foam light soil layer both sides, can further improve the stability and the intensity of road surface structural layer, reinforced concrete layer and foam light soil layer. The rigid plastic net has the advantages of high wear resistance, high corrosion resistance and high toughness, and the rigid plastic net covers the clay slope, so that the clay moving loss can be effectively reduced, and the stability of the clay slope is enhanced.

In a specific implementation mode, a water drainage pipeline is arranged in the clay slope and communicated with the waterproof geomembrane, plain soil is arranged on one side, away from the reinforced concrete layer, of the clay slope, and a water drainage groove communicated with the water drainage pipeline is formed in the plain soil.

Through adopting above-mentioned technical scheme, when waterproof geomembrane has ponding, the drain pipe can be with ponding drainage to water drainage tank as the drainage media, can accelerate the emission of ponding to reduce the erosion influence of ponding to foam light soil layer, strengthened foam light soil layer's stability.

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

1. the foam light soil layer is a novel engineering filler with light weight and excellent mechanical property, has stronger loading capacity, and can effectively avoid the phenomenon of foundation settlement. The arrangement of the reinforcing piles can improve the connection strength between the foamed light soil layer and other layers. The combination of foam light soil layer and reinforced pile compares in traditional pile sand layer joint concrete material, has strengthened subway top foundation structure's stability more effectively.

2. The setting of this application slip casting back up coat, the gap of stratum underground is repaired through the mode of slip casting, has improved the intensity and the stability of foundation basis.

Drawings

Fig. 1 is a schematic general structural diagram of a road structure applied above a subway according to an embodiment of the present application.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic view of the connection of a first geogrid and a second geogrid according to an embodiment of the present application.

Fig. 4 is a schematic structural view of the connection buckle according to the embodiment of the present application.

Fig. 5 is an exploded schematic view of a road structure applied above a subway according to an embodiment of the present application.

Description of reference numerals: 1. a pavement structure layer; 2. a foamed light soil layer; 3. reinforcing piles; 4. galvanizing wire netting; 5. a reinforced concrete layer; 6. a waterproof geomembrane; 7. a crushed stone layer; 8. compounding the geomembrane; 81. filament geotextile; 82. a plastic film; 9. grouting a reinforcing layer; 10. a clay slope; 11. a rigid plastic mesh; 12. a water drainage pipe; 13. a water discharge tank; 14. a first geogrid; 15. a second geogrid; 16. connecting buckles; 161. a connecting plate; 162. buckling a head plate; 17. a card interface; 18. clamping the bulges; 19. and (5) plain soil.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a road structure applied to the upper portion of a subway. Referring to fig. 1 and 2, a road structure for subway top is including setting up the slip casting back up coat 9 subaerial, makes the hole of a plurality of cylindrical tube-shapes of certain degree of depth subaerial earlier, pours into the slip casting concrete into downtheholely, and the slip casting concrete passes through the crack of pressure transfer underground, plays the effect of repairing the fracture layer, has improved the stability and the intensity of slip casting back up coat 9. And laying a second geogrid 15 on the grouting reinforcement layer 9, laying a certain amount of broken stones on the second geogrid 15 to form a gravel layer 7, and fixing two sides of the gravel layer 7 by using first geogrids 14.

Referring to fig. 3 and 4, one side of the first geogrid 14 close to the second geogrid 15 is provided with a plurality of connecting buckles 16, each connecting buckle 16 comprises a connecting plate 161 and a buckle head plate 162, the connecting plate 161 is provided with a plurality of clamping ports 17, the clamping ports 17 are uniformly distributed on the connecting plate 161, the buckle head plate 162 is a plate with a net shape, the buckle head plate 162 is provided with a plurality of clamping protrusions 18, each clamping protrusion 18 is conical, and the clamping protrusions 18 are uniformly distributed on the buckle head plate 162. Through joint interface 17 and the protruding 18 supporting use of joint and link together connecting plate 161 and buckle head board 162, during the dismantlement, only need with joint protruding 18 from joint interface 17 take out can. The first geogrid 14 is connected with the second geogrid 15 through the connecting buckles 16, and the effect of fixing the gravel layer 7 is achieved, so that movement of gravel in the gravel layer 7 is reduced.

Referring to fig. 2 and 5, the top surface of the crushed stone layer 7 is provided with an accommodating groove, which is arc-shaped in this embodiment. Composite geomembrane 8 is laid to the top surface of metalling 7, and the laminating of composite geomembrane 8 is at the tank bottom of holding tank, and composite geomembrane 8 includes long filament geotechnological cloth 81 and plastic film 82, and long filament geotechnological cloth 81 bonds in the below of plastic film 82, and composite geomembrane 8 has good straining force and waterproof performance, sets up the structural stability that composite geomembrane 8 can strengthen metalling 7 on metalling 7, reduces the rainwater erosion, and the effective metalling 7 settlement phenomenon that reduces takes place. The reinforcing piles 3 are arranged above the containing groove, the bottom ends of the reinforcing piles 3 are located above the composite geomembrane 8, after the reinforcing piles 3 are poured and formed, the foam light soil layer 2 is laid above the composite geomembrane 8, the height of the foam light soil layer 2 is equal to that of the top ends of the reinforcing piles 3, the foam light soil layer 2 is composed of foam light soil, the foam light soil is light novel engineering filler, the reinforcing pile has the advantages of small density and light weight, the conventional sand piling layer combined concrete is replaced, the load effect on a subway tunnel can be reduced, the phenomenon of foundation settlement under the condition of overload is avoided, the reinforcing piles 3 can tightly connect the foam light soil layer 2 and the gravel layer 7, and the stability of the foam light soil layer 2 can be improved. The waterproof geomembrane 6 is laid above the foam light soil layer 2, accumulated water can be intercepted and discharged outside, the accumulated water is prevented from permeating the foam light soil layer 2, the stability of the foam light soil layer 2 is enhanced, the galvanized iron wire mesh 4 is laid on the waterproof geomembrane 6, the galvanized iron wire mesh 4 can play a role in fixing the waterproof geomembrane 6, and the stability of the waterproof geomembrane 6 is improved. A reinforced concrete layer 5 is poured above the galvanized wire mesh 4, and the reinforced concrete layer 5 has good mechanical strength. And a pavement structure layer 1 is arranged above the reinforced concrete layer 5.

Referring to fig. 5, foam light soil layer 2 both sides all are equipped with clay slope 10, and the top of clay slope 10 and the top of road surface structural layer 1 are on same water flat line, and the bottom of clay slope 10 is located the top of metalling 7, and the setting of clay slope 10 can alleviate the rainwater to the impact wear on reinforced concrete layer 5 and foam light soil layer 2 both sides, improves reinforced concrete layer 5 and foam light soil layer 2's stability and intensity. Because the rigid plastic net 11 has the characteristics of high wear resistance, corrosion resistance and toughness, the rigid plastic net 11 covers the surface of the clay slope 10, so that the clay moving loss can be effectively reduced, and the stability of the clay slope 10 is enhanced. Meanwhile, the design of the mesh structure in the rigid plastic net 11 can also increase the aesthetic property of the clay slope 10. Be equipped with outlet pipe 12 in the clay slope 10, outlet pipe 12 is connected with one side on foam light soil layer 2 top, and outlet pipe 12 is located galvanized iron wire net 4's top, and ponding between reinforced concrete layer 5 and the foam light soil layer 2 can be discharged through outlet pipe 12. Clay slope 10 deviates from one side on reinforced concrete layer 5 and is equipped with plain soil 19, is equipped with the water drainage tank 13 with drain pipe 12 intercommunication on the plain soil 19, drains the ponding drainage tank 13 that drain pipe 12 discharged out, can accelerate the discharge process of ponding, and then reduces the erosion influence of ponding to foam light soil layer 2, has strengthened foam light soil layer 2's stability.

The implementation principle of the road structure applied above the subway is as follows: and (3) forming a plurality of cylindrical holes on the ground, injecting the grout concrete into the holes to obtain a grouting reinforcement layer 9, wherein the grouting reinforcement layer 9 can enhance the firmness of the construction road foundation. And laying a second geogrid 15 on the grouting reinforcement layer 9, laying gravels with a certain thickness on the second geogrid 15 to obtain a gravel layer 7, arranging first geogrids 14 on two sides of the gravel layer 7, and tightly connecting the first geogrids 14 and the second geogrids 15 through connecting buckles 16, so that the gravel layer 7 can be stably fixed above the grouting reinforcement layer 9. Composite geomembrane 8 has been laid to 7 top surfaces of metalling, and composite geomembrane 8 can prevent that ponding further permeates metalling 7, and 7 top surfaces of metalling are equipped with the holding tank, and the setting of holding tank can reduce the focus of top foam light soil layer 2 for 2 structures on foam light soil layer are more stable. Be equipped with in the foam light soil layer 2 and add the stake 3 for it is more firm between the foam light soil layer 2 is inside, and add the bottom of stake 3 and establish on the top surface of metalling 7, can strengthen the joint strength between metalling 7 and the foam light soil layer 2. And a waterproof geomembrane 6 is laid above the foam light soil layer 2, and the waterproof geomembrane 6 can prevent accumulated water from permeating into the foam light soil layer 2 and strengthen the structural stability of the foam light soil layer 2. The zinc-plated wire netting 4 can fix waterproof geomembrane 6, reduces waterproof geomembrane 6's removal. 4 tops of galvanized iron wire net are equipped with reinforced concrete layer 5, and the both sides on reinforced concrete layer 5 are equipped with clay slope 10, and the setting of clay slope 10 can reduce the both sides of road surface structural layer 1, reinforced concrete layer 5 and foam light soil layer 2 and receive the erodeing of rainwater. The arrangement of the drainage pipeline 12 and the drainage channel 13 can quickly drain accumulated water, and the accumulated water is prevented from permeating into the foam light soil layer 2 structure.

Compared with the prior art, the arrangement of the foam light soil layer 2 in the embodiment of the application provides a light and high-strength novel engineering material for the road structure above the subway, the arrangement of the reinforcing piles 3 further strengthens the connection strength between the inner parts of the foam light soil layer 2, and the arrangement of the foam light soil layer 2 and the reinforcing piles 3 improves the stability of the road structure above the subway.

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 (8)

1. The utility model provides a be applied to road structure of subway top which characterized in that: the road surface structure layer is characterized by comprising a road surface structure layer (1), wherein a foam light soil layer (2) is arranged below the road surface structure layer (1), and a plurality of reinforcing piles (3) are arranged in the foam light soil layer (2).

2. A road structure for use above a subway as claimed in claim 1, wherein: be equipped with reinforced concrete layer (5) between road surface structural layer (1) and foam light soil layer (2), be equipped with galvanized wire netting (4) between reinforced concrete layer (5) and foam light soil layer (2), galvanized wire netting (4) below is equipped with waterproof geomembrane (6).

3. A road structure for use above a subway according to claim 1, wherein: the below of foam light soil layer (2) is equipped with metalling (7), the top surface of metalling (7) is equipped with the holding tank, metalling (7) both sides are equipped with first geogrid (14), be equipped with compound geomembrane (8) between metalling (7) and foam light soil layer (2), the bottom of reinforcing pile (3) is located the top of compound geomembrane (8).

4. A road structure for use above a subway according to claim 3, wherein: the composite geomembrane (8) comprises filament geotextile (81) and a plastic film (82), wherein the filament geotextile (81) is bonded below the plastic film (82).

5. A road structure for use above a subway according to claim 3, wherein: gravel layer (7) below is equipped with slip casting back up coat (9), be equipped with second geogrid (15) between gravel layer (7) and slip casting back up coat (9), one side that first geogrid (14) are close to second geogrid (15) is equipped with a plurality of connector links (16), and first geogrid (14) and second geogrid (15) are connected through connector link (16).

6. A road structure for applying above subway according to claim 5, characterized in that: the connector link (16) includes connecting plate (161) and discount board (162), connecting plate (161) are equipped with a plurality of joint interfaces (17), discount board (162) are equipped with a plurality of joint arch (18).

7. A road structure for use above a subway according to claim 3, wherein: foam light soil layer (2) both sides all are equipped with clay slope (10), the top of clay slope (10) is in on same plane with the top of road surface structural layer (1), be equipped with rigid plastic net (11) on clay slope (10), clay slope (10) are located the top of metalling (7).

8. A road structure for applying above subway according to claim 7, characterized in that: be equipped with outlet conduit (12) in clay slope (10), outlet conduit (12) and waterproof geomembrane (6) intercommunication, one side that clay slope (10) deviates from reinforced concrete layer (5) is equipped with plain soil (19), is equipped with water drainage tank (13) with outlet conduit (12) intercommunication on plain soil (19).

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