CN115506200B - Construction method of expressway roadbed and rapid drainage structure - Google Patents

Construction method of expressway roadbed and rapid drainage structure Download PDF

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Publication number
CN115506200B
CN115506200B CN202211290931.0A CN202211290931A CN115506200B CN 115506200 B CN115506200 B CN 115506200B CN 202211290931 A CN202211290931 A CN 202211290931A CN 115506200 B CN115506200 B CN 115506200B
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layer
roadbed
radial
highway
drain pipe
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CN115506200A (en
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姜旭
鲁春晖
郝静华
李恩波
阚科平
石磊
李伟
杨森
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/22Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224Surface drainage of streets
    • E01C11/225Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • E01C11/226Coherent pavings
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F5/00Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F1/00Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/002Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
    • E03F1/003Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells via underground elongated vaulted elements
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F3/00Sewer pipe-line systems
    • E03F3/04Pipes or fittings specially adapted to sewers

Abstract

The application discloses a highway subgrade and a construction method of a rapid drainage structure, and relates to the technical field of subgrades, wherein the subgrade comprises a base layer which is paved on the surface of a highway soil layer, and the construction method further comprises the following steps: the regenerated gravel layer is paved at the top end of the base layer; the roadbed surface layer structure is arranged at the top end of the regenerated gravel layer; the roadbed periphery side structure is arranged at two ends of the base layer, a longitudinal drainage structure and a radial drainage structure are arranged between the roadbed periphery side structure and the base layer in a penetrating manner, and the longitudinal drainage structure is communicated with the radial drainage structure; the slope protection structure is arranged on a mountain body outside the roadbed surface layer, the slope protection structure comprises a intercepting canal, the bottom end of the intercepting canal is further provided with an intercepting drain pipe, and the intercepting drain pipe is communicated with the radial drain structure. The application effectively improves the erosion effect of water flow on the roadbed in the mountain area and prolongs the service life of the roadbed.

Description

Construction method of expressway roadbed and rapid drainage structure
Technical Field
The application relates to the technical field of roadbeds, in particular to a highway roadbed and a construction method of a rapid drainage structure.
Background
In the prior art, the application patent CN110172884A discloses a mountain highway subgrade and a construction method, and the application also discloses a relatively mature technical scheme at present, the novel mountain highway subgrade comprises a hollowed subgrade and a filling subgrade, a main drainage ditch is built at the joint of the hollowed subgrade and a mountain, a plurality of row of guest grid boxes are arranged at the top end of the hollowed subgrade, the guest grid boxes are arranged from the inside of the main drainage ditch to the hollowed subgrade, a concrete ridge is longitudinally built at one side of the top end of the hollowed subgrade, which is opposite to the filling subgrade, the concrete ridge is higher than the guest grid boxes and the top surface of the filling subgrade, a waterproof layer is paved on the top surface of the filling subgrade, the top surface of the concrete ridge and the top surface of the waterproof layer are used for paving a pavement structure layer. The scheme can ensure the structural strength of the roadbed, expand the effective drainage cross-sectional area of the drainage ditch, has the characteristics of strong drainage capacity and reliable drainage, and can protect the roadbed safety for a long time;
in mountain highway construction, most highways need to be built by taking mountains, and the slope of two banks of some projects is steep, and the drainage work is used as the important basic part of highway construction, not only influences the life of road surface, but also influences the stability of road bed, especially in mountain highway's application, in partial prior art, mountain highway is eroded in heavy rain, very easy landslide collapses, cause the road facilities to destroy, cause very big potential safety hazard for driving, the scheme in the above-mentioned prior art can play certain mountain highway drainage effect, but its highway bottom overall structure distributes inequality, leads to whole road bed density inequality, easily takes place deformation at mountain road section, leads to the life of highway to receive the influence.
Disclosure of Invention
The embodiment of the application provides a highway subgrade and a construction method of a rapid drainage structure, and mainly aims to solve the problems of highway collapse and deformation caused by unsmooth drainage in mountain areas.
To achieve the above object, a first aspect of the embodiments of the present application provides an expressway subgrade, including a base layer, where the base layer is laid on a soil layer surface of an expressway, further including:
the regenerated gravel layer is paved at the top end of the base layer;
the roadbed surface layer structure is arranged at the top end of the regenerated gravel layer;
the roadbed periphery side structure is arranged at two ends of the base layer, a longitudinal drainage structure and a radial drainage structure are arranged between the roadbed periphery side structure and the base layer in a penetrating manner, and the longitudinal drainage structure is communicated with the radial drainage structure;
the slope protection structure is arranged on a mountain body outside the roadbed surface layer, the slope protection structure comprises a intercepting canal, the bottom end of the intercepting canal is further provided with an intercepting drain pipe, and the intercepting drain pipe is communicated with the radial drain structure.
In one possible embodiment, the subgrade surface layer structure comprises: the first concrete layer, the geogrid layer, the second concrete layer and the pavement asphalt layer; the pavement asphalt layer is arranged at the top end of the second concrete layer and the top end of the first concrete layer, a geogrid layer is further arranged between the second concrete layer and the first concrete layer, and two sides of the geogrid layer extend to the outer sides of two ends of the second concrete layer and the first concrete layer and penetrate through the longitudinal drainage structure.
In one possible embodiment, the longitudinal drain structure comprises a infiltration block, a support plate, an underdrain, a first grouting closure, an edge drain; the infiltration blocks are fixedly arranged at the top end edges of the geogrid layer, underdrain is arranged at the top ends of the infiltration blocks, support plates are arranged at the top ends of the underdrain, the top ends of the support plates are tightly attached to the pavement asphalt layer, and a plurality of edge drain pipes which are arranged at intervals are longitudinally arranged at two sides of the regeneration rubble layer, the base layer, the first concrete layer and the second concrete layer; the opening position of the top end of the side drain pipe corresponds to the permeation position of the permeation block, and a first grouting sealing piece is further arranged on the outer wall of the side drain pipe and used for protecting and reinforcing the side drain pipe.
In a possible implementation mode, the support plate and the infiltration block are provided with tiny infiltration holes, and a horizontal reinforcing steel bar structure is further arranged in the support plate.
In one possible embodiment, the radial drain structure comprises: radial shunt tubes, external drain tubes, and connectors; the road soft soil layer is characterized in that the radial shunt tubes are arranged above the road soft soil layer and are positioned at the bottom end of a base layer, through holes are formed in the positions of the tops of the radial shunt tubes, two ends of each radial shunt tube are respectively connected with the intercepting drain tube and the roadbed peripheral side structure, the outer drain tube is arranged on the roadbed peripheral side structure and is communicated with the radial shunt tubes, a plurality of connecting pieces are fixedly sleeved on the outer walls of the radial shunt tubes, water inlets at the tops of the connecting pieces are also connected with the bottoms of the side drain tubes, water interception plates are horizontally paved on the tops of the radial shunt tubes, and the water interception plates are in one-to-one correspondence with the positions of the through holes.
In a possible implementation mode, the slope protection structure comprises a slope protection enclosing baffle, a shutoff protection piece and a shutoff plate, wherein the slope protection enclosing baffle is used for covering mountain bodies beside a highway, the shutoff protection piece is detachably arranged at the bottom of a channel of the shutoff channel, and the shutoff plate is fixedly arranged on one side channel edge, close to the highway, outside the shutoff channel.
In a possible implementation mode, the roadbed surface layer structure further comprises gentle slope portions and railings, wherein the gentle slope portions are arranged at two ends of the pavement asphalt layer and are located on the outer side of the underdrain, the gentle slope portions are higher than the pavement asphalt layer above the underdrain, and the railings are arranged on the gentle slope portions at intervals.
In one possible embodiment, the roadbed peripheral side structure comprises gabions, a second grouting closure, an edge reinforcement zone, a regenerated macadam filling zone, a partition plate and a water tank; the gabion is the incline state and arranges in the both sides of basic unit, the gabion inboard still is provided with regeneration rubble filling area for the packing regeneration rubble, the gabion outside is still fixedly provided with the second slip casting closure piece, the slip casting of second slip casting closure piece forms limit portion reinforcing area, is located the mountain body and keeps away from one side the second slip casting closure piece inner chamber bottom still is provided with the division board, the division board will the bottom of second slip casting closure piece is cut apart and is formed the basin, the basin is linked together with a plurality of radial shunt tubes.
In a feasible implementation mode, the slope protection structure further comprises a fixing piece, a plug tube and reinforcing columns, wherein the fixing piece is fixedly arranged at the top end of the intercepting drain pipe, a plurality of detachable plug tubes are further arranged in the intercepting drain pipe, the bottom ends of the plug tubes are all extended to the inner side of the intercepting drain pipe, the top ends of the plug tubes are clamped at the bottom end of the inner wall of the intercepting drain pipe, and a plurality of reinforcing columns are welded between the fixing piece and the intercepting drain pipe.
In a second aspect of the present application, there is provided a rapid drainage structure construction method of an expressway subgrade as described in the first aspect, comprising the steps of:
leveling a road surface, and arranging radial shunt pipes and intercepting drain pipes at intervals according to preset sizes;
paving a water interception plate, keeping the hole positions corresponding to each other, and paving a roadbed layer and a roadbed surface layer structure;
determining the position of the longitudinal drainage structure, and finishing grouting fixation of the longitudinal drainage structure;
arranging an inclined roadbed peripheral side structure towards the edge of the base layer, and perfecting a drainage underdrain structure at the edge of the roadbed surface layer structure;
constructing mountain slope protection structure, setting up the shutoff canal to with shutoff drain pipe intercommunication.
The construction method of the expressway subgrade and the rapid drainage structure provided by the application has at least the following beneficial effects:
1. the highway subgrade provided by the application comprises a base layer and a regenerated gravel layer, and has certain environmental protection value, wherein the longitudinal drainage structures are arranged at the two sides of the highway and are used for collecting water flow on the peripheral side structure of the highway, so that the water flow can be discharged through the pipeline structure arranged at the inner side of the highway subgrade, the erosion of long-time rainwater to the peripheral side of the highway subgrade is reduced, and the service life of the highway subgrade is ensured;
2. the longitudinal drainage structure is communicated with the radial drainage structure, the radial drainage structure penetrates through the whole roadbed at the bottom end of the base layer, and the scheme is suitable for roads beside mountain bodies, water flows are easily collected at mountain positions of the roads, including debris flows and the like, the damage degree of the roads is relatively serious, the slope protection structure can effectively protect the slope parts of the mountain bodies, if water flows are left, the slope protection structure can effectively intercept the water flows, has a certain filtering effect, intercepts the water flows radially flowing to the roads, vertically guides the water flows to the underground, and effectively prevents erosion and impact of the radial water flows to the roads.
3. The intercepting drain pipe, the longitudinal drain structure, the radial drain structure and the roadbed peripheral side structure are all in a communication state, for example, when the flow rate of a slope protection part is extremely high, the drainage capacity of the intercepting drain pipe penetrating into a mountain is reduced, the water level in the intercepting drain pipe is increased, when the water level is increased to the radial drain pipe, flood can be discharged from the other side of a highway through the radial drain pipe, and a protection measure is taken when the water flow is in a high-flow state.
Drawings
Fig. 1 is a schematic perspective view of a highway subgrade according to an embodiment of the present application;
fig. 2 is a schematic cross-sectional structure of a highway subgrade according to an embodiment of the present application;
fig. 3 is a schematic structural view of a cartridge according to an embodiment of the present application;
fig. 4 is an enlarged view at a in fig. 1;
FIG. 5 is an enlarged view at B in FIG. 2;
FIG. 6 is an enlarged view at C in FIG. 2;
fig. 7 is a flowchart illustrating a construction method of a rapid drainage structure of a highway subgrade according to an embodiment of the present application.
In the figure: 1. the construction method comprises the following steps of a base layer, 2, a regenerated gravel layer, 3, a first concrete layer, 4, a geogrid layer, 5, a second concrete layer, 6, a pavement asphalt layer, 7, a slope protection structure, 8, a closure drain pipe, 9, a gentle slope part, 10, a railing, 11, a support plate, 12, an underdrain, 13, a permeable block, 14, a first grouting closure, 15, a side drain pipe, 16, a radial shunt pipe, 17, an external drain pipe, 18, a connecting piece, 19, a water interception plate, 20, a water permeable hole, 21, gabion, 22, a second grouting closure, 23, a side reinforcement area, 24, a regenerated gravel filling area, 25, a partition plate, 26, a water tank, 27, a fixing piece, 28, an insertion barrel, 29, a reinforcing column, 71, a slope protection fence, 72, a closure, 73 and a closure plate.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the following detailed description of the technical solutions of the embodiments of the present specification is made through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes two or more cases.
The embodiment of the application provides a highway subgrade and a construction method of a rapid drainage structure, and mainly aims to solve the problems of highway collapse and deformation caused by unsmooth drainage in mountain areas.
As shown in fig. 1 to 6, an expressway subgrade comprises a base layer 1, wherein the base layer 1 is paved on the surface of a highway soil layer, and the expressway subgrade further comprises: the device comprises a regenerated gravel layer 2, a roadbed surface layer structure, a roadbed peripheral side structure, a longitudinal drainage structure, a radial drainage structure, a slope protection structure 7 and a interception drain pipe 8; the regenerated gravel layer 2 is paved on the top end of the base layer 1; the roadbed surface layer structure is arranged at the top end of the regenerated gravel layer 2; the road foundation peripheral side structures are arranged at two ends of the base layer 1, and a longitudinal drainage structure and a radial drainage structure are arranged between the road foundation peripheral side structures and the base layer 1 in a penetrating manner, and are communicated; the slope protection structure 7 is arranged on a mountain body outside the roadbed surface layer, the slope protection structure 7 comprises a intercepting canal, the bottom end of the intercepting canal is further provided with an intercepting drain pipe 8, and the intercepting drain pipe 8 is communicated with the radial drain structure.
According to the technical scheme, the expressway subgrade comprises the base layer 1 and the regenerated gravel layer 2, wherein the regenerated gravel layer 2 is paved at the top end of the base layer 1, the regenerated gravel layer 2 has a certain environmental protection value and good water permeability, the top end of the regenerated gravel layer 2 is also provided with a subgrade surface layer structure, the subgrade surface layer structure is used for fixedly connecting an integral highway structure, and the integral highway structure comprises the regenerated gravel layer 2, longitudinal drainage structures on two sides and a subgrade peripheral side structure, so that the integral highway comprehensive performance is improved, the longitudinal drainage structures are arranged on the two sides of the highway and used for collecting water flow on the peripheral side structure of the highway, so that the water flow can be discharged through the pipeline structure arranged on the inner side of the expressway, corrosion of long-time rainwater on the peripheral side of the roadbed is reduced, and the service life of the subgrade is ensured; in addition, the longitudinal drainage structure is communicated with the radial drainage structure, and the radial drainage structure penetrates through the whole roadbed at the bottom end of the base layer 1, so that the scheme is suitable for roads beside mountain bodies, water flows are easily collected at mountain positions of the roads, the situation of debris flows and the like flows down in a homeotropic mode, the damage degree of the roads is relatively serious, the slope protection structure 7 can effectively protect the slope of the mountain bodies, if water flows are left through the slope protection structure 7, the water flows can be effectively intercepted, a certain filtering effect is achieved, the water flows radially flowing to the roads are intercepted, and the water flows are vertically led to the ground, and corrosion and impact of the radial water flows to the roads are effectively prevented.
In addition, the intercepting drain pipe 8, the longitudinal drain structure, the radial drain structure and the roadbed peripheral side structure are all in a communication state, for example, when the flow rate of a slope protection part is extremely high, the drainage capacity of the intercepting drain pipe 8 penetrating into a mountain is reduced, the water level in the intercepting drain pipe 8 is increased, when the water level is increased to the radial drain pipe, flood can be discharged from the other side of a highway through the radial drain pipe, and a protection measure is taken when the water flow is high, the side drain pipes 15 are positioned at two sides of the highway and are connected with the radial shunt pipes 16, wherein the two ends of the radial separation pipes are water outlets, and when the water quantity on the surface of the highway is relatively high, flood discharge and drainage can be well carried out, so that the roadbed structure is protected from corrosion damage.
The regenerated macadam is a novel recycling material proposed by the current construction industry, waste base 1 materials excavated from old roads are recycled in the prior art, the cement macadam is used in base 1 fillers of the roads on a large scale after being cemented by lime, and the cement macadam is regenerated into base 1 materials after being stabilized, so that the cement macadam has huge economic, environmental and social benefits.
Referring to fig. 2, in some examples, the subgrade surface structure includes: a first concrete layer, a geogrid layer 4, a second concrete layer 5 and a pavement asphalt layer 6;
wherein second concrete layer 5 and first concrete layer are laid on regeneration rubble layer 2, and pavement asphalt layer 6 arranges on the top of second concrete layer 5 and first concrete layer, wherein still is provided with geogrid layer 4 between second concrete layer 5 and the first concrete layer, and geogrid layer 4's both sides extend to the both ends outside of second concrete layer 5 and first concrete layer to run through in vertical drainage structures.
It can be understood that the geogrid layer 4 in the application has the effect of stabilizing materials, wherein the two ends of the geogrid layer 4 are positioned on the outer side of the concrete layer, and the peripheral side structure and the longitudinal drainage structure of the roadbed on the two sides of the roadbed surface structure can be tightly connected with the geogrid layer, so that the side and the top structure of the whole roadbed are more reliable, and meanwhile, the geogrid layer 4 does not influence the rainwater infiltration effect, and the application effect is better.
Referring to FIG. 2, in some examples, the longitudinal drain structure includes a permeate block 13, a support sheet 11, an underdrain 12, a first grouting closure 14, and an edge drain 15;
the infiltration blocks 13 are fixedly arranged at the top end edges of the geogrid layer 4, the underdrain 12 is arranged at the top ends of the infiltration blocks 13, the supporting plates 11 are arranged at the top ends of the underdrains 12, the top ends of the supporting plates 11 are tightly attached to the pavement asphalt layer 6, and a plurality of side drain pipes 15 which are arranged at intervals are longitudinally arranged at two sides of the regenerated gravel layer 2, the base layer 1, the first concrete layer and the second concrete layer 5; the open position on limit drain pipe 15 top corresponds with the infiltration position of infiltration piece 13, and the outer wall of limit drain pipe 15 still is provided with first slip casting closure 14 for protect reinforcement to limit drain pipe 15, all arrange tiny infiltration hole on backplate 11 and the infiltration piece 13, still be provided with horizontal reinforced structure in the backplate 11.
It can be understood that asphalt has a better water permeable effect, and meanwhile, the asphalt is excellent in wear resistance, and is mostly used for construction of highway surface structures, specifically, when the rainfall is large, part of rainwater on a highway surface flows to the upper parts of underdrains 12 on two sides from the middle part of the highway, the rainwater permeates to the permeation block 13 through the asphalt layer and the support plate 11, the underdrains 12 can supply water flow through the permeation block 13, the permeation is carried out through the permeation position of the permeation block 13 in the water flow process, the permeation is carried out to the side drain pipes 15 and flows downwards, the water flows into the radial drain pipes and finally flows out to two sides of the highway through the external drain pipes 17 or the intercepting drain pipes 8 on two sides, and the drainage pipeline of the drainage structure in the roadbed provided by the scheme is reasonable, and can effectively cope with extreme weather such as burst floodwater.
Wherein, be provided with the infiltration point of different positions on the infiltration piece 13, when the infiltration position of one of them department appears the infiltration ability decline, can permeate through the radial other infiltration points of underdrain 12, permeate between rivers in the in-process that flows and reduce, effectively guarantee the drainage effect of structure.
Referring to fig. 2 and 6, in some examples, the radial drain structure includes: a radial shunt tube 16, an external drain tube 17, and a connector 18;
the radial shunt tubes 16 are arranged above a highway soft soil layer and are positioned at the bottom end of the base layer 1, through holes are formed in the positions of the top ends of the radial shunt tubes 16, two ends of each radial shunt tube 16 are respectively connected with the intercepting drain tube 8 and the roadbed peripheral side structure, an external drain tube 17 is arranged on the roadbed peripheral side structure and is communicated with the radial shunt tubes 16, a plurality of connecting pieces 18 are fixedly sleeved on the outer wall of each radial shunt tube 16, water inlets at the top ends of the connecting pieces 18 are further connected with the bottom ends of the side drain tubes 15, a water interception plate 19 is further arranged between the base layer 1 and the radial shunt tubes 16, the water interception plate 19 is horizontally paved at the top ends of the radial shunt tubes 16, a plurality of water penetration holes 20 are formed in the water interception plate 19, and the water penetration holes 20 correspond to the positions of the through holes one by one.
It will be appreciated that the radial shunt tube 16 is provided in the present application, wherein the radial shunt tube 16 penetrates through the whole highway subgrade, the radial shunt tube 16 plays multiple roles in the present scheme, wherein the primary role is to provide a flow path for the water flow penetrating through the highway radially, so as to prevent the erosion state of the water flow in the direction to the highway subgrade, in addition, when the water draining capacity of one side of the radial shunt tube 16 is reduced, the water can be drained to the other side, therefore, the radial shunt tube 16 plays a reliable drainage effect in the present application, in addition, besides the longitudinal drainage structure, a small amount of water flow can permeate from the asphalt layer on the highway surface, the permeated water flow permeates into the regenerated gravel layer 2 through the highway surface layer structure and finally permeates to the top end of the water interception plate 19, the water flow is intercepted through the water interception plate 19 and permeates into the radial drainage pipeline through the through holes on the water interception plate 19, and the water interception plate 19 is provided to effectively place the hollow space below the subgrade caused by the permeated water flow through the highway subgrade, so that the water and soil is lost, and the service life of the highway is effectively ensured.
Referring to fig. 3, in some examples, the slope protection structure 7 includes a slope protection fence, a closure guard 72 and a closure plate 73, the slope protection fence is used for covering a mountain beside a highway, the closure guard 72 is detachably arranged at the bottom of a closure canal, and the closure plate 73 is fixedly arranged on a side canal edge, which is close to the highway, outside the closure canal.
It can be understood that the slope protection structure 7 ensures that the soil rock on the surface layer of the mountain body beside the highway is not scattered, prevents the condition such as mud-rock flow that the rain wash caused, moreover the shutoff canal in the slope protection structure 7 plays the shutoff effect of mountain water flow, wherein the shutoff canal is provided with the shutoff protection 72 pieces, can play certain filter effect to the water flow about to flow into the mountain body through the shutoff protection 72 pieces, places too much impurity leaf, and branch shutoff drain pipe 8, so the shutoff protection 72 pieces can play the unblocked of the drainage structure in the whole highway subgrade.
Referring to fig. 2, in some examples, the roadbed surface layer structure further includes a gentle slope portion 9 and a railing 10, the gentle slope portion 9 is disposed at two ends of the road asphalt layer 6 and is located outside the underdrain 12, the gentle slope portion 9 is higher than the road asphalt layer 6 above the underdrain 12, and the railing 10 is disposed on the gentle slope portion 9 at intervals.
It will also be appreciated that the provision of the gentle slope 9 ensures the gathering effect of the water flow above the underdrain 12, prevents the water flow on the road surface from flushing the curb, further ensures the protection effect of the road bed, and the balustrade 10 intercepts and protects the road edge.
Referring to fig. 2, in some examples, the roadbed perimeter structures include gabions 21, second grouting enclosures 22, edge reinforcement areas 23, reclaimed crushed stone filling areas 24, dividers 25, and water tanks 26;
the gabion 21 is arranged on two sides of the base layer 1 in an inclined state, a regenerated broken stone filling area 24 is further arranged on the inner side of the gabion 21 and used for filling regenerated broken stone, a second grouting sealing piece 22 is further fixedly arranged on the outer side of the gabion 21, an edge reinforcing area 23 is formed by grouting of the second grouting sealing piece 22, a partition plate 25 is further arranged at the bottom end of an inner cavity of the second grouting sealing piece 22 located on one side, far away from a mountain, a water tank 26 is formed by dividing the bottom end of the second grouting sealing piece 22 through the partition plate 25, and the water tank 26 is communicated with the radial shunt tubes 16.
It is worth mentioning that traditional highway subgrade does not set up the protective structure to the subgrade along with highway practical year's increase in the both sides of subgrade mostly, the long-lasting rivers impact of receiving of subgrade and the rolling of vehicle, its subgrade border position can take place corresponding structural change, the second slip casting closure 22 that provides in this example can intercept the protection to the road base both sides, keep the trapezoidal shape and the inclination of whole subgrade, wherein still fill between second slip casting closure 22 and the basic unit 1 and have regeneration rubble, regeneration rubble is spacing to keep in the inboard of second slip casting closure 22 through gabion 21, use more environmental protection through adopting the scheme of regeneration rubble on the one hand to the subgrade limit structure, on the other hand regeneration rubble is effectual to the shock resistance of rivers for the comprehensive properties of the subgrade structure that this scheme provided obtains showing and promotes.
Referring to fig. 3, in some examples, the slope protection structure 7 further includes a fixing member 27, an inserting cylinder 28 and a reinforcing column 29, wherein the fixing member 27 is fixedly arranged at the top end of the intercepting drain pipe 8, a plurality of detachable inserting cylinders 28 are further arranged in the intercepting drain pipe, the bottom end of each inserting cylinder 28 extends to the inner side of the intercepting drain pipe 8, the top end of each inserting cylinder 28 is clamped at the bottom end of the inner wall of the intercepting drain pipe, and a plurality of reinforcing columns 29 are welded between the fixing member 27 and the intercepting drain pipe.
In the concrete implementation process, the intercepting drain pipe 8 is buried underground for a long time, so that a structure convenient for maintaining a pipe orifice is arranged, namely, the inserting cylinder 28 in the example is inserted into the intercepting drain pipe 8 in a detachable mode, if the inserting cylinder 28 deforms, wears or is blocked, the intercepting drain pipe can be directly taken out for replacement or cleaning, the maintenance difficulty of staff is reduced, and the reinforcing column 29 and the fixing piece 27 effectively ensure the fixed connection effect between the slope protection structure 7 and the intercepting drain pipe 8.
A second aspect of the present application provides a construction method for a rapid drainage structure of an expressway subgrade, fig. 7 is a flowchart of a construction method for a rapid drainage structure and an expressway subgrade according to an embodiment of the present application,
as shown in fig. 7, the embodiment of the present application provides, in a second aspect, the rapid drainage structure construction method as in the first aspect, including the steps of:
s1, flattening a road surface, and arranging radial shunt tubes 16 and a cut-off drain pipe 8 at intervals according to preset sizes, wherein one side of the radial shunt tubes 16 with through holes faces upwards, and a plurality of radial shunt tubes 16 can be filled with a fixing material;
s2, paving a water interception plate 19, keeping hole positions corresponding to each other, paving two ends of the water interception plate 19 to the bottom of a regenerated broken stone filling area 24, and paving a roadbed layer 1 and a roadbed surface layer structure;
s3, determining the position of the longitudinal drainage structure, arranging the edge drainage pipe 15, and completing grouting fixing operation of the longitudinal drainage structure;
s4, arranging an inclined roadbed peripheral side structure towards the edge of the base layer 1, enabling the whole roadbed to keep a trapezoid structure, perfecting the structure of the drainage underdrain 12 at the edge of the roadbed surface layer structure, comprising the arrangement of the underdrain 12 and the support plate 11, paving an asphalt layer towards the top end of the support plate 11, and grouting in the second grouting sealing piece 22;
s5, constructing a mountain slope protection structure 7, setting a cut-off channel, installing a cut-off plate 73 at the side of the cut-off channel to intercept flood, setting a plug cylinder 28 to place a jack at the bottom of the cut-off channel, and communicating with a cut-off drain pipe.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process or method comprising such elements.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (4)

1. The utility model provides a highway subgrade, includes the basic unit, the basic unit is laid on highway soil layer surface, its characterized in that still includes:
the regenerated gravel layer is paved at the top end of the base layer;
the roadbed surface layer structure is arranged at the top end of the regenerated gravel layer;
the roadbed periphery side structure is arranged at two ends of the base layer, a longitudinal drainage structure and a radial drainage structure are arranged between the roadbed periphery side structure and the base layer in a penetrating manner, and the longitudinal drainage structure is communicated with the radial drainage structure;
the slope protection structure is arranged on a mountain body outside the roadbed surface layer and comprises a shutoff channel, a shutoff drain pipe is further arranged at the bottom end of the shutoff channel, and the shutoff drain pipe is communicated with the radial drain structure;
the roadbed surface layer structure comprises: the first concrete layer, the geogrid layer, the second concrete layer and the pavement asphalt layer;
the second concrete layer and the first concrete layer are paved on the regenerated gravel layer, the pavement asphalt layer is arranged at the top ends of the second concrete layer and the first concrete layer, a geogrid layer is further arranged between the second concrete layer and the first concrete layer, and two sides of the geogrid layer extend to the outer sides of two ends of the second concrete layer and the first concrete layer and penetrate through the longitudinal drainage structure;
the longitudinal drainage structure comprises a penetration block, a support plate, an underdrain, a first grouting sealing piece and an edge drainage pipe;
the infiltration blocks are fixedly arranged at the top end edges of the geogrid layer, underdrain is arranged at the top ends of the infiltration blocks, support plates are arranged at the top ends of the underdrain, the top ends of the support plates are tightly attached to the pavement asphalt layer, and a plurality of edge drain pipes which are arranged at intervals are longitudinally arranged at two sides of the regeneration rubble layer, the base layer, the first concrete layer and the second concrete layer; the top end of the side drain pipe is provided with an opening corresponding to the penetration position of the penetration block, and the outer wall of the side drain pipe is also provided with a first grouting sealing piece for protecting and reinforcing the side drain pipe;
fine infiltration holes are uniformly distributed on the support plate and the infiltration blocks, and a horizontal reinforcing steel bar structure is also arranged in the support plate;
the radial drainage structure includes: radial shunt tubes, external drain tubes, and connectors;
the radial shunt tubes are arranged above a highway soft soil layer and positioned at the bottom end of a base layer, through holes are formed in the positions of the top ends of the radial shunt tubes, two ends of the radial shunt tubes are respectively connected with the intercepting drain tubes and the roadbed peripheral side structure, the external drain tubes are arranged on the roadbed peripheral side structure and are communicated with the radial shunt tubes, a plurality of connecting pieces are fixedly sleeved on the outer walls of the radial shunt tubes, water inlets at the top ends of the connecting pieces are also connected with the bottom ends of the edge drain tubes, water interception plates are further arranged between the base layer and the radial shunt tubes and are horizontally paved at the top ends of the radial shunt tubes, and a plurality of water penetration holes are formed in the water interception plates and correspond to the positions of the through holes one by one;
the slope protection structure comprises a slope protection enclosing baffle, a closure protection piece and a closure plate, wherein the slope protection enclosing baffle is used for covering mountain bodies beside a highway, the closure protection piece is detachably arranged at the bottom of a closure canal, and the closure plate is fixedly arranged on the side of the closure canal, which is close to the highway, outside the closure canal;
the roadbed surface layer structure further comprises gentle slope portions and railings, the gentle slope portions are arranged at two ends of the pavement asphalt layer and located on the outer side of the underdrain, the gentle slope portions are higher than the pavement asphalt layer above the underdrain, and the railings are arranged on the gentle slope portions at intervals.
2. The highway subgrade according to claim 1, wherein:
the roadbed peripheral side structure comprises gabions, a second grouting sealing piece, an edge reinforcing area, a regenerated broken stone filling area, a partition plate and a water tank;
the gabion is the incline state and arranges in the both sides of basic unit, the gabion inboard still is provided with regeneration rubble filling area for the packing regeneration rubble, the gabion outside is still fixedly provided with the second slip casting closure piece, the slip casting of second slip casting closure piece forms limit portion reinforcing area, is located the mountain body and keeps away from one side the second slip casting closure piece inner chamber bottom still is provided with the division board, the division board will the bottom of second slip casting closure piece is cut apart and is formed the basin, the basin is linked together with a plurality of radial shunt tubes.
3. The highway subgrade according to claim 1, wherein:
the slope protection structure further comprises a fixing piece, an inserting cylinder and reinforcing columns, wherein the fixing piece is fixedly arranged at the top end of the intercepting drain pipe, a plurality of detachable inserting cylinders are further arranged in the intercepting channel, the bottom ends of the inserting cylinders are all extended to the inner side of the intercepting drain pipe, the top ends of the inserting cylinders are clamped at the bottom end of the inner wall of the intercepting channel, and a plurality of reinforcing columns are welded between the fixing piece and the intercepting channel.
4. A method of constructing a rapid drainage structure of a highway subgrade as claimed in any one of claims 1 to 3, comprising the steps of:
leveling a road surface, and arranging radial shunt pipes and intercepting drain pipes at intervals according to preset sizes;
paving a water interception plate, keeping the hole positions corresponding to each other, and paving a roadbed layer and a roadbed surface layer structure;
determining the position of the longitudinal drainage structure, and finishing grouting fixation of the longitudinal drainage structure;
arranging an inclined roadbed peripheral side structure towards the edge of the base layer, and perfecting a drainage underdrain structure at the edge of the roadbed surface layer structure;
constructing mountain slope protection structure, setting up the shutoff canal to with shutoff drain pipe intercommunication.
CN202211290931.0A 2022-10-21 2022-10-21 Construction method of expressway roadbed and rapid drainage structure Active CN115506200B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104264557A (en) * 2014-08-28 2015-01-07 杭州江润科技有限公司 Semi-filling and semi-excavating ecological subgrade structure and construction method
CN206553854U (en) * 2017-03-02 2017-10-13 莫禄 A kind of ruggedized construction of retaining wall and roadbed
CN211036590U (en) * 2019-09-25 2020-07-17 东莞市鸿宇世纪建设工程有限公司 Roadbed protective structure permeates water
CN211142681U (en) * 2019-11-18 2020-07-31 黑龙江省八达路桥建设有限公司 Highway subgrade settlement-preventing device
CN211472024U (en) * 2019-12-21 2020-09-11 广东恒基隆建设有限公司 Town road laying structure
CN113106799A (en) * 2021-04-15 2021-07-13 核工业南方工程总公司 Roadbed structure of road and bridge engineering and construction method thereof
CN113417180A (en) * 2021-01-26 2021-09-21 绍兴文理学院 Regenerated broken stone rapid drainage roadbed structure
CN214882663U (en) * 2021-04-28 2021-11-26 鑫蓝设计集团有限公司 Road design roadbed reinforced structure
CN215800763U (en) * 2021-09-22 2022-02-11 吴继镔 Highway asphalt concrete pavement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104264557A (en) * 2014-08-28 2015-01-07 杭州江润科技有限公司 Semi-filling and semi-excavating ecological subgrade structure and construction method
CN206553854U (en) * 2017-03-02 2017-10-13 莫禄 A kind of ruggedized construction of retaining wall and roadbed
CN211036590U (en) * 2019-09-25 2020-07-17 东莞市鸿宇世纪建设工程有限公司 Roadbed protective structure permeates water
CN211142681U (en) * 2019-11-18 2020-07-31 黑龙江省八达路桥建设有限公司 Highway subgrade settlement-preventing device
CN211472024U (en) * 2019-12-21 2020-09-11 广东恒基隆建设有限公司 Town road laying structure
CN113417180A (en) * 2021-01-26 2021-09-21 绍兴文理学院 Regenerated broken stone rapid drainage roadbed structure
CN113106799A (en) * 2021-04-15 2021-07-13 核工业南方工程总公司 Roadbed structure of road and bridge engineering and construction method thereof
CN214882663U (en) * 2021-04-28 2021-11-26 鑫蓝设计集团有限公司 Road design roadbed reinforced structure
CN215800763U (en) * 2021-09-22 2022-02-11 吴继镔 Highway asphalt concrete pavement

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