CN117027009A - Underpass road structure and its construction method - Google Patents
Underpass road structure and its construction method Download PDFInfo
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- CN117027009A CN117027009A CN202310468017.9A CN202310468017A CN117027009A CN 117027009 A CN117027009 A CN 117027009A CN 202310468017 A CN202310468017 A CN 202310468017A CN 117027009 A CN117027009 A CN 117027009A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
- E03F3/046—Open sewage channels
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Civil Engineering (AREA)
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- Water Supply & Treatment (AREA)
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- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Road Paving Structures (AREA)
Abstract
本发明公开了一种下穿道路结构及其施工方法，属于下穿道路领域，本下穿道路结构包括雨水排水系统，雨水排水系统设置在桥梁两侧的纵坡上，雨水排水系统用于收集输送径流雨水。地下水排水系统，地下水排水系统设置在桥梁两侧纵坡下方，地下水排水系统与雨水排水系统连通，地下水排水系统标高低于雨水排水系统，地下水排水系统包括若干盲管，若干盲管上开设有若干过水孔，若干盲管用于降低地下水水位。通过防水支档结构，阻挡地下水向纵坡覆盖区域渗流，通过地下水排水系统降低地下水位，进而减小运维期间泵站抽排量，有效降低路基范围稳定地下水位高度，隔断路基工作区毛细水，根除涉水路面病害问题，延长路面结构使用寿命。
The invention discloses an underpass road structure and a construction method thereof, belonging to the field of underpass roads. The underpass road structure includes a rainwater drainage system. The rainwater drainage system is arranged on the longitudinal slopes on both sides of the bridge. The rainwater drainage system is used to collect rainwater. Transport runoff rainwater. Groundwater drainage system. The groundwater drainage system is set under the longitudinal slopes on both sides of the bridge. The groundwater drainage system is connected with the rainwater drainage system. The elevation of the groundwater drainage system is lower than that of the rainwater drainage system. The groundwater drainage system includes a number of blind pipes, and a number of blind pipes are opened on them. Water holes and several blind tubes are used to lower the groundwater level. The waterproof support structure prevents groundwater from seeping into the longitudinal slope coverage area, reduces the groundwater level through the groundwater drainage system, thereby reducing the pumping volume of the pump station during operation and maintenance, effectively reducing the stable groundwater level within the subgrade range, and blocking capillary water in the subgrade working area. , eradicate water-related pavement disease problems and extend the service life of the pavement structure.
Description
Technical Field
The invention relates to the field of underpass roads, in particular to an underpass road structure and a construction method thereof.
Background
The soil quality in plain areas is mainly silty soil and silty clay, and belongs to the soil quality with low permeability coefficient. With the rapid development of the transportation industry, the condition of crossing existing roads and railways under the road becomes more frequent.
At present, a downward-penetrating road structure generally adopts a closed frame form, longitudinal slopes on two sides adopt a retaining wall and side ditch drainage structure, and the scheme of retaining wall and side ditch drainage enables the downward-penetrating road to have larger water seepage amount during operation, the groundwater level is higher and difficult to drain, and the groundwater seepage is coupled with capillary action, so that roadbeds are easily hollowed out, and road diseases such as pavement subsidence, broken plates, crack staggering and the like are frequently generated.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and therefore, the invention provides a downward-penetrating road structure and a construction method thereof, which can reduce the seepage of groundwater and prevent road diseases such as broken plates, cracks, staggered platforms and the like caused by uneven settlement of a road surface.
The underpass road structure comprises a rainwater drainage system, wherein the rainwater drainage system is arranged on longitudinal slopes on two sides of a bridge and is used for collecting and conveying runoff rainwater. The underground water drainage system is arranged below longitudinal slopes on two sides of the bridge and is communicated with the rainwater drainage system, the elevation of the underground water drainage system is lower than that of the rainwater drainage system, the underground water drainage system comprises a plurality of blind pipes, a plurality of water passing holes are formed in the blind pipes, and the blind pipes are used for reducing the water level of the underground water.
The underpass road structure provided by the embodiment of the invention has at least the following beneficial effects: through waterproof backing structure, block groundwater to longitudinal slope coverage area seepage flow, reduce groundwater level through groundwater drainage system, and then reduce pump station pumping capacity during fortune dimension, effectively reduce the steady groundwater level of road bed scope, cut off road bed work area capillary water, guarantee road bed work area water stable strength, eradicate wading road surface disease problem, extension road surface structure life.
According to some embodiments of the invention, the bridge further comprises a waterproof retaining structure, wherein the waterproof retaining structure is arranged on two sides of the bridge and surrounds the longitudinal slope edges on two sides of the bridge, the waterproof retaining structure penetrates through the ground and underground to form a vertical barrier, and the waterproof retaining structure is used for reducing groundwater seepage.
According to some embodiments of the invention, a waterproof retaining structure comprises: the underground supporting structure is arranged below the longitudinal slopes at two sides of the bridge and is arranged around the edges of the longitudinal slopes in a closed mode, and the underground supporting structure is used for blocking underground water from penetrating into the coverage area of the longitudinal slopes; the ground supporting structure is arranged at the upper end of the underground supporting structure, the ground supporting structure is arranged on two sides of the longitudinal slope, the ground supporting structure is arranged along the extending direction of the road, and the ground supporting structure is used for preventing surface runoffs from converging into the longitudinal slope.
According to some embodiments of the invention, the groundwater drainage system further comprises: the drainage cushion layer is used for guiding surface runoff to infiltrate into the blind pipes; the drainage pump station is communicated with the blind pipes and is used for pumping accumulated water.
According to some embodiments of the invention, a stormwater drainage system comprises: the first side ditch is arranged on the longitudinal slope, is arranged along the extending direction of the road and is communicated with the drainage pump station; the second side ditch is arranged on the longitudinal slope and is perpendicular to the extending direction of the road, the second side ditch is positioned at one end of the longitudinal slope with a lower elevation, the second side ditch is used for intercepting the runoff of the longitudinal slope, and the second side ditch is communicated with the drainage pump station; the water accumulation well is communicated with the first side ditch and the second side ditch, is communicated with a plurality of blind pipes and is communicated with a drainage pump station, and is used for collecting accumulated water.
According to some embodiments of the invention, the bridge further comprises a connecting structure, wherein the connecting structure is arranged at the joint of the bridge and the longitudinal slopes at two sides, and the connecting structure is used for reducing sedimentation between the longitudinal slopes and the bridge.
According to some embodiments of the invention, the engagement structure comprises a butt strap, the butt strap is arranged at the joint of the longitudinal slope and the bridge in a covering manner, the butt strap is arranged at the upper end of the underground supporting structure, and the butt strap is used for enabling the longitudinal slope and the bridge to be engaged smoothly.
The underpass road construction method according to the embodiment of the second aspect of the present invention includes:
step 1: sequentially constructing an underground supporting structure along the edge direction of the longitudinal slope, and constructing an overground supporting structure at the upper end of the underground supporting structure;
step 2: backfilling the earthwork of the ground supporting and retaining structure after construction is completed, and connecting the ground supporting and retaining structure with a bridge;
step 3: the method comprises the steps of determining the changing and filling thickness, the road vertical requirement and the blind pipe size, digging a road groove in the range of a road surface structural layer according to the changing and filling thickness and the road vertical requirement, digging a blind pipe groove in the road groove according to the blind pipe diameter, and constructing and installing a plurality of blind pipes to enable the blind pipes to be communicated with a drainage pump station;
step 4: arranging a clay layer at the bottom of the blind pipe, wrapping the blind pipe by using geotextile, backfilling the blind pipe groove with sand gravel to form a roadbed drainage cushion layer, and backfilling the roadbed groove with a dense material to form a roadbed;
step 5: chiseling the edge of the existing bridge bottom plate to form an L-shaped rabbet, implanting anchor bars into the bridge bottom plate at equal intervals, binding the reinforcing steel bars of the access plate, and pouring concrete to form the access plate.
According to some embodiments of the invention, in step 1, a leveling layer is provided between the above-ground and below-ground retaining structures.
According to some embodiments of the invention, in step 2, a settlement joint is provided between the ground retaining structure and the bridge.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of a underpass road structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of one side of the underpass of FIG. 1;
FIG. 3 is a plan view of FIG. 1;
FIG. 4 is a schematic view of the engagement structure of FIG. 1;
FIG. 5 is a cross-sectional view of the engagement structure of FIG. 1;
FIG. 6 is a cross-sectional view of the groundwater drainage system and the rainwater drainage system of FIG. 1;
FIG. 7 is a cross-sectional view showing the connection of the retaining wall and the waterproof curtain of FIG. 1;
FIG. 8 is a cross-sectional view of the drainage mat of FIG. 2;
FIG. 9 is an enlarged view of a portion of FIG. 3;
fig. 10 is a flow chart of a construction method of the underpass road structure in fig. 1.
Reference numerals:
a rainwater drainage system 100, a first side ditch 110, a second side ditch 120, and a ponding well 130;
groundwater drainage system 200, blind pipe 210, water passing hole 211, first blind pipe 212, second blind pipe 213, drainage mat 220, clay layer 230, road bed 240;
a waterproof retaining structure 300, an underground retaining structure 310, an overground retaining structure 320, and a leveling layer 330;
joining structure 400, butt strap 410, rigid butt strap 411, elastic butt strap 412, sleeper beam 420, tongue-and-groove 430;
bridge 10, longitudinal slope 20.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that the direction or positional relationship indicated in reference to the description of the orientation, such as up, down, front, rear, left, right, etc., is based on the direction or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be structured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
A underpass road structure and a construction method thereof according to an embodiment of the present invention are described with reference to fig. 1 to 10.
As shown in fig. 1 to 10, the underpass road structure according to the embodiment of the present invention includes: the rainwater drainage system 100, the rainwater drainage system 100 is arranged on the longitudinal slopes 20 on two sides of the bridge 10, and the rainwater drainage system 100 is used for collecting and conveying runoff rainwater. The underground water drainage system 200, the underground water drainage system 200 sets up in bridge 10 both sides longitudinal slope 20 below, and underground water drainage system 200 and rainwater drainage system 100 intercommunication, and underground water drainage system 200 elevation is less than rainwater drainage system 100, and underground water drainage system 200 includes a plurality of blind pipes 210, has seted up a plurality of water holes 211 on a plurality of blind pipes 210, and a plurality of blind pipes 210 are used for reducing the groundwater water level.
As shown in fig. 1 and 3, the bridge 10 is provided with a longitudinal slope 20 on the front and rear sides, the underpass section is a low-lying section, the vehicle runs downwards through the longitudinal slope 20, and runs upwards to a straight lane through the longitudinal slope 20 on the other side after passing through the bottom of the bridge, and it should be noted that the bridge 10 in this embodiment is a frame bridge, and the frame bridge is a pile foundation light bridge abutment in a frame structure in the transverse bridge direction, and is mainly used for an interchange between a railway and a highway and an interchange between a highway and a highway. The rainwater drainage systems 100 are arranged on the longitudinal slopes 20 on two sides of the frame bridge, and the rainwater drainage systems 100 are used for collecting and conveying surface runoffs and reducing the penetration of the surface runoffs into the road surface structures of the longitudinal slopes 20 so as to enable the groundwater level to rise. The underground water drainage system 200 is located below the longitudinal slopes 20 on two sides of the frame bridge, the elevation of the underground water drainage system 200 is lower than that of the rainwater drainage system 100, the underground water drainage system 200 is communicated with the rainwater drainage system 100, the underground water drainage system 200 comprises a plurality of blind pipes 210, and a plurality of water passing holes 211 are formed in the blind pipes 210. Thereby, surface runoff is prevented from further penetrating into the road structure, groundwater can flow into the blind pipe 210 through the water passing holes 211, and surface runoff and groundwater seepage are collected and discharged through the cooperation of the groundwater drainage system 200 and the rainwater drainage system 100, thereby achieving the reduction of groundwater level.
Further, as shown in fig. 3 and 6, the plurality of blind pipes 210 includes a first blind pipe 212 and a second blind pipe 213, where the first blind pipe 212 and the second blind pipe 213 are mutually communicated, the first blind pipe 212 is disposed along the front-back direction, the trend of the first blind pipe 212 is consistent with that of the longitudinal slope 20, in this embodiment, two first blind pipes 212 are disposed, and the two first blind pipes 212 are respectively located on the left and right sides of the longitudinal slope 20. The second blind pipe 213 is arranged along the left-right direction, the gradient of the second blind pipe 213 is consistent with the composite gradient of the road extending direction and the vertical road extending direction, and the first blind pipe 212 and the second blind pipe 213 are communicated in a herringbone shape so as to increase the contact area between the underground water and the second blind pipe 213 and enable more underground water to flow out through the first blind pipe 212 and the second blind pipe 213. In this embodiment, six second blind pipes 213 are provided, the six second blind pipes 213 are all disposed intersecting with two first blind pipes 212, the six second blind pipes 213 are respectively communicated with the two first blind pipes 212, and the plurality of second blind pipes 213 are mutually communicated. From this, in groundwater infiltration first blind pipe 212 and the second blind pipe 213, carry out the drainage through the drainage pump station to ponding in first blind pipe 212 and the second blind pipe 213, reduce the height of groundwater level, make the groundwater level height in 20 road beds of longitudinal slope in steady state, guarantee that the road bed keeps stable intensity.
It is contemplated that the first blind pipe 212 may be provided with one, three, five, etc., and the second blind pipe 213 may be provided with two, four, eight, etc., and that the plurality of first blind pipes 212 and the plurality of second blind pipes 213 may each increase the contact surface finish of the groundwater with the first blind pipes 212 and the second blind pipes 213 so that more groundwater can be collected in the first blind pipes 212 and the second blind pipes 213.
In some embodiments of the present invention, the waterproof supporting structure 300 is further included, the waterproof supporting structure 300 is disposed at two sides of the bridge 10, the waterproof supporting structure 300 is disposed around edges of longitudinal slopes 20 at two sides of the bridge 10, the waterproof supporting structure 300 forms a vertical barrier throughout the ground and underground, and the waterproof supporting structure 300 is used for reducing groundwater seepage.
The longitudinal slopes 20 at the front end and the rear end of the frame bridge are provided with waterproof supporting structures 300, the waterproof supporting structures 300 are arranged around the edges of the longitudinal slopes 20 in a surrounding mode, the waterproof supporting structures 300 are arranged on the ground and underground in a penetrating mode, therefore, a vertical barrier surrounding the longitudinal slopes 20 is formed through the waterproof supporting structures 300, the seepage flow of underground water is reduced, and the water level of the underground water is further reduced.
In some embodiments of the present invention, the waterproof standoff structure 300 includes: the underground supporting structure 310 is arranged below the longitudinal slopes 20 on two sides of the bridge 10, the underground supporting structure 310 is arranged around the edges of the longitudinal slopes 20 in a closed mode, and the underground supporting structure 310 is used for preventing underground water from penetrating into the coverage areas of the longitudinal slopes 20; the ground supporting structure 320, the ground supporting structure 320 sets up in underground supporting structure 310 upper end, and ground supporting structure 320 sets up in the longitudinal slope 20 both sides, and ground supporting structure 320 sets up along the road extending direction, and ground supporting structure 320 is used for preventing the surface runoff and gathers into longitudinal slope 20.
As shown in fig. 2 and 3, the waterproof supporting structure 300 includes an above-ground supporting structure 320 and an under-ground supporting structure 310, the under-ground supporting structure 310 is disposed below the ground surface, the under-ground supporting structure 310 is disposed around the edge of the longitudinal slope 20 in a closed manner, the above-ground supporting structure 320 is disposed through the ground surface, the above-ground supporting structure 320 is disposed at the upper end of the under-ground supporting structure 310, the above-ground supporting structure 320 is disposed at the left and right sides of the longitudinal slope 20, and the above-ground supporting structure 320 is disposed in the front-rear direction, so that the above-ground supporting structure 320 and the under-ground supporting structure 310 form a waterproof supporting barrier in the vertical direction around the edge of the longitudinal slope 20, and can prevent groundwater outside the coverage area of the longitudinal slope 20 from penetrating into the coverage area of the longitudinal slope 20, thereby reducing the total amount of groundwater.
Further, as shown in fig. 3 and 9, the underground supporting structures 310 on the left and right sides of the longitudinal slope 20 protrude from the underground supporting structure on the rear side of the longitudinal slope 20 to further block the infiltration of groundwater into the roadbed of the longitudinal slope 20.
Specifically, the above-ground retaining structure 320 is a cantilever retaining wall, the thickness of the cantilever retaining wall is small, the self weight is light, the cantilever retaining wall can adapt to the condition of low bearing capacity of the foundation, and the waterproof curtain can prevent seepage of a permeable layer outside the longitudinal slope 20 into the longitudinal slope 20 under the action of the level difference between the inside and the outside of the longitudinal slope 20 and prevent damage caused by seepage of sand and the like.
In some embodiments of the present invention, the groundwater drainage system 200 further includes: a drainage mat 220, the drainage mat 220 being used to guide surface runoff to penetrate into the plurality of blind pipes 210; the drainage pump station is communicated with the blind pipes 210 and is used for pumping accumulated water.
As shown in fig. 3 and 6, the groundwater drainage system 200 further includes a drainage mat 220 and a drainage pump station, where the drainage pump station is communicated with the first blind pipe 212 and the second blind pipe 213, and the drainage pump station can pump and drain the accumulated water in the first blind pipe 212 and the second blind pipe 213, so as to reduce the height of the groundwater level, make the groundwater level height in the range of 20 roadbeds of the longitudinal slope be in a stable state, and ensure that the roadbeds maintain stable strength.
In some embodiments of the present invention, the stormwater drainage system 100 comprises: the first side ditch 110, the first side ditch 110 is arranged on the longitudinal slope 20, the first side ditch 110 is arranged along the extending direction of the road, and the first side ditch 110 is communicated with the drainage pump station; the second side ditch 120 is arranged on the longitudinal slope 20, the second side ditch 120 is arranged perpendicular to the extending direction of the road, the second side ditch 120 is positioned at one end of the longitudinal slope 20 with a lower elevation, the second side ditch 120 is used for intercepting runoff of the longitudinal slope 20, and the second side ditch 120 is communicated with the drainage pump station; the water accumulation well 130, the water accumulation well 130 is communicated with the first side ditch 110 and the second side ditch 120, the water accumulation well 130 is communicated with the blind pipes 210, the water accumulation well 130 is communicated with a drainage pump station, and the water accumulation well 130 is used for collecting water accumulation.
As shown in fig. 2 and 3, the rainwater drainage system 100 includes a first side ditch 110, a second side ditch 120 and a water accumulation well 130, and as shown in fig. 6, the first blind pipe 212, the second blind pipe 213, the first side ditch 110, the second side ditch 120 and the water accumulation well 130 are all communicated with a drainage pump station, and the drainage pump station can pump and drain the water accumulation in the first side ditch 110, the second side ditch 120, the first blind pipe 212, the second blind pipe 213 and the water accumulation well 130. The first side grooves 110 are disposed along the front-rear direction, in this embodiment, the first side grooves 110 are disposed in two, and are respectively located at the left and right sides of the longitudinal slope 20, and the first side grooves 110 are disposed near the ground supporting structures 320 at the left and right sides of the longitudinal slope 20. The second side ditch 120 is arranged on the longitudinal slope 20, the second side ditch 120 is arranged along the left-right direction, the second side ditch 120 is positioned at one end of the longitudinal slope 20 with lower elevation, as shown in fig. 3, the second side ditch 120 is arranged at the right end of the longitudinal slope 20 and communicated with the first side ditch 110 so as to cut off the runoff of the rainwater on the road surface, and the accumulated water is prevented from entering the underpass section road of the frame bridge to form accumulated water so as to cause damage to the road. The water-accumulating wells 130 are disposed on the longitudinal slope 20, and the water-accumulating wells 130 are located at one end of the longitudinal slope 20 with a lower elevation, as shown in fig. 3, where the water-accumulating wells 130 are disposed at the right end of the longitudinal slope 20, in this embodiment, four water-accumulating wells 130 are disposed along the left-right direction, and four water-accumulating wells 130 are located on the same straight line. Thus, the rainwater falls on the longitudinal slope 20, flows into the first side ditch 110 and the second side ditch 120 at the lower elevation end of the longitudinal slope 20 along with the longitudinal slope 20, finally flows into the water accumulation well 130, and flows out through the pumping drainage of the drainage pumping station.
Specifically, the accumulated water collected by the first blind pipe 212, the second blind pipe 213, the first side ditch 110 and the second side ditch 120 is collected into the water accumulation well 130, when the water level of the accumulated water rises to a designated elevation, a water pump switch of the drainage pump station is triggered to pump the accumulated water, the water level is reduced to a water pump protection height, and then the water pump stops running.
In some embodiments of the present invention, the bridge further comprises a joining structure 400, wherein the joining structure 400 is disposed at the junction of the bridge 10 and the longitudinal slopes 20 at both sides, and the joining structure 400 is used for reducing sedimentation between the longitudinal slopes 20 and the bridge 10.
As shown in fig. 4 and 5, in order to reduce differential settlement between the roadbed of the longitudinal slope 20 and the frame bridge and ensure driving safety and comfort, a joint structure 400 is arranged at the joint of the longitudinal slope 20 and the frame bridge, and the joint structure 400 covers the upper part of the joint of the longitudinal slope 20 and the frame bridge.
In some embodiments of the present invention, the binding structure includes a butt strap 410, the butt strap 410 is disposed at the junction of the longitudinal slope 20 and the bridge 10 in a covering manner, the butt strap 410 is disposed at the upper end of the underground support structure 310, and the butt strap 410 is used to smoothly connect the longitudinal slope 20 and the bridge 10.
As shown in fig. 5, the engagement structure 400 includes a bridge plate 410, and the bridge plate 410 covers the junction between the longitudinal slope 20 and the frame bridge, specifically, a sleeper beam 420 is provided under the bridge plate 410, and the bridge plate 410 is connected with the underground supporting structure 310 through the sleeper beam 420. Specifically, the access panel 410 is connected to the frame bridge by a planted bar.
Further, the butt strap 410 includes a rigid butt strap 411 and an elastic butt strap 412, the rigid butt strap 411 is disposed between the sleeper beam 420 and the frame bridge, the elastic butt strap 412 is disposed between the longitudinal slope 20 and the sleeper beam 420, the rigid butt strap 411 and the sleeper beam 420 form a hinge support by the alternate arrangement of the rigid butt strap 411 and the elastic butt strap 412, the elastic butt strap 412 is supported on the longitudinal slope 20, so that the smooth connection transition of the roadbed-frame bridge can be realized, and meanwhile, the butt strap 410 can also prevent the infiltration of groundwater, and has a waterproof protection effect on the roadbed 240 and the frame bridge of the longitudinal slope 20.
As shown in fig. 10, the following describes a construction method of the present underpass road structure with a specific construction example:
step 1: sequentially constructing waterproof curtains along the edge direction of the longitudinal slope 20, constructing cantilever retaining walls at the upper ends of the waterproof curtains along the left side and the right side of the longitudinal slope 20, and arranging a leveling layer 330 between the cantilever retaining walls and the waterproof curtains;
step 2: backfilling the earthwork of the cantilever retaining wall after construction, performing construction of a settlement joint, arranging a rubber water stop between the settlement joints, enabling two ends of the rubber water stop to penetrate through the cantilever retaining wall and a frame bridge respectively, burying the rubber water stop between the cantilever retaining wall and the frame bridge, and then filling joints with asphalt hemp yarns and plugging the joints with caulking paste.
Step 3: the method comprises the steps of determining the filling thickness, the road vertical requirement and the size of the blind pipes 210, digging a road groove in the range of a pavement structural layer according to the filling thickness and the road vertical requirement, digging blind pipe 210 grooves in the road groove according to the diameter of the blind pipes 210, constructing and installing a plurality of blind pipes 210, and communicating a plurality of blind pipes 210 with a drainage pump station;
step 4: a 10cm thick clay layer 230 is arranged at the bottoms of the first blind pipe 212 and the second blind pipe 213, geotextiles are used for wrapping the first blind pipe 212 and the second blind pipe 213 respectively, sand gravel is used for backfilling the blind pipe 210 to form a drainage cushion layer 220 with the thickness of 50cm, and dense material is used for backfilling the road grooves to form a road bed 240;
step 5: the edge of the bottom plate of the existing bridge 10 is chiseled to form an L-shaped rabbet 430, the depth of the L-shaped rabbet 430 is the same as the thickness of the butt strap 410, anchor bars are implanted in the bottom plate of the bridge 10 at equal intervals, the butt strap 410 steel bars are bound, and concrete is poured to form the butt strap 410.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (10)
1. A underpass structure comprising:
the rainwater drainage system (100) is arranged on longitudinal slopes (20) at two sides of the bridge (10), and the rainwater drainage system (100) is used for collecting and conveying runoff rainwater;
groundwater drainage system (200), groundwater drainage system (200) set up in bridge (10) both sides longitudinal slope (20) below, groundwater drainage system (200) with rainwater drainage system (100) intercommunication, groundwater drainage system (200) elevation is less than rainwater drainage system (100), groundwater drainage system (200) include a plurality of blind pipes (210), a plurality of water hole (211) have been seted up on blind pipe (210), a plurality of blind pipe (210) are used for reducing groundwater water level.
2. The underpass road structure of claim 1, further comprising a waterproof retaining structure (300), the waterproof retaining structure (300) being disposed on both sides of the bridge (10), the waterproof retaining structure (300) being disposed around edges of longitudinal slopes (20) on both sides of the bridge (10), the waterproof retaining structure (300) forming a vertical barrier throughout the ground and underground, the waterproof retaining structure (300) being for reducing groundwater seepage.
3. The underpass road structure of claim 2, wherein said waterproof retaining structure (300) comprises:
the underground supporting structure (310) is arranged below the longitudinal slopes (20) on two sides of the bridge (10), the underground supporting structure (310) is arranged around the edges of the longitudinal slopes (20) in a closed mode, and the underground supporting structure (310) is used for preventing underground water from penetrating into the coverage area of the longitudinal slopes (20);
the ground supporting structure (320), the ground supporting structure (320) is arranged at the upper end of the underground supporting structure (310), the ground supporting structure (320) is arranged at two sides of the longitudinal slope (20), the ground supporting structure (320) is arranged along the extending direction of a road, and the ground supporting structure (320) is used for preventing surface runoffs from remitting into the longitudinal slope (20).
4. A underpass road structure according to claim 3, wherein the groundwater drainage system (200) further comprises:
a drainage mat (220), the drainage mat (220) being used to guide surface runoff to penetrate into a plurality of the blind pipes (210);
the drainage pump station is communicated with the blind pipes (210) and is used for draining accumulated water.
5. The underpass road structure of claim 4, wherein said rainwater drainage system (100) comprises:
the first side ditch (110), the first side ditch (110) is arranged on the longitudinal slope (20), the first side ditch (110) is arranged along the extending direction of the road, and the first side ditch (110) is communicated with the drainage pump station;
the second side ditch (120) is arranged on the longitudinal slope (20), the second side ditch (120) is arranged perpendicular to the extending direction of the road, the second side ditch (120) is positioned at one end of the longitudinal slope (20) with a lower elevation, the second side ditch (120) is used for intercepting the runoff of the longitudinal slope (20), and the second side ditch (120) is communicated with the drainage pump station;
the water accumulation well (130), water accumulation well (130) with first side ditch (110) second side ditch (120) intercommunication, water accumulation well (130) with a plurality of blind pipe (210) intercommunication, water accumulation well (130) with drainage pump station intercommunication, water accumulation well (130) are used for collecting ponding.
6. The underpass road structure of claim 5, further comprising a joining structure (400), said joining structure (400) being disposed at the junction of the bridge (10) and the side longitudinal slopes (20), said joining structure (400) being used to reduce sedimentation between the longitudinal slopes (20) and the bridge (10).
7. The underpass road structure of claim 6, wherein the engagement structure (400) comprises an access panel (410), the access panel (410) being disposed over the junction of the longitudinal slope (20) and the bridge (10), the access panel (410) being disposed on the upper end of the underground support structure (310), the access panel (410) being configured to smoothly engage the longitudinal slope (20) with the bridge (10).
8. A construction method of a underpass road structure, characterized in that the underpass road structure is the underpass road structure according to claim 7, the construction method comprising:
step 1: sequentially constructing the underground supporting structure (310) along the edge direction of the longitudinal slope (20), and constructing the above-ground supporting structure (320) at the upper end of the underground supporting structure (310);
step 2: backfilling the earthwork of the ground supporting structure (320) after construction is completed, and connecting the ground supporting structure (320) with the bridge (10);
step 3: defining a filling thickness, a road vertical requirement and a blind pipe (210) size, digging a road groove in the range of a pavement structural layer according to the filling thickness and the road vertical requirement, digging a blind pipe (210) groove in the road groove according to the diameter of the blind pipe (210), and constructing and installing a plurality of blind pipes (210) so that the blind pipes (210) are communicated with the drainage pump station;
step 4: arranging a clay layer (230) at the bottom of the blind pipe (210), wrapping the blind pipe (210) by using geotextile, backfilling the blind pipe (210) groove with sand gravel to form a roadbed drainage cushion layer (220), and backfilling the roadbed groove with a dense material to form a roadbed (240);
step 5: chiseling the edge of the bottom plate of the existing bridge (10) to form an L-shaped rabbet (430), implanting anchor bars into the bottom plate of the bridge (10) at equal intervals, binding the steel bars of the access plate (410), and pouring concrete to form the access plate (410).
9. The method of constructing a underpass road structure according to claim 8, wherein in step 1, a leveling layer (330) is provided between the above-ground abutment structure (320) and the below-ground abutment structure (310).
10. The method of constructing a underpass road structure according to claim 8, wherein in step 2, a settlement joint is provided between the ground stopper structure (320) and the bridge (10).
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| CN202310468017.9A CN117027009B (en) | 2023-04-27 | 2023-04-27 | Underpass Road Structure and Construction Method |
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| CN118668731A (en) * | 2024-08-16 | 2024-09-20 | 中国矿业大学 | Method for reinforcing coal measure stratum mudstone side slope system |
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| CN117027009B (en) | 2026-04-17 |
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