CN113481777B

CN113481777B - Fast bus traveling roadbed

Info

Publication number: CN113481777B
Application number: CN202110834252.4A
Authority: CN
Inventors: 袁春坤; 刘声树; 黄飞; 鞠志成
Original assignee: China Road and Bridge Corp
Current assignee: China Road and Bridge Corp
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-06-24
Anticipated expiration: 2041-07-21
Also published as: CN113481777A

Abstract

The invention discloses a rapid public transport vehicle roadbed, which comprises a roadbed and a roadbed, wherein the roadbed is sequentially provided with the following components from bottom to top: the soft soil base layer is formed by leveling and tamping soft soil, and a main drainage pipe is pre-buried in the soft soil base layer; the gravel layer is formed above the soft soil base layer by pouring gravel and cement, and a retaining wall, a bearing frame and a monitoring structure are arranged inside the gravel layer; the gravel layer is formed by pouring gravel and cement, and a water tank is arranged inside the gravel layer; the permeable brick layer is formed by a brick body above the crushed stone layer and is provided with a permeable structure; the bituminous concrete layer is formed above the permeable brick layer and comprises coarse-grained bituminous concrete below, medium-grained bituminous concrete above and a stiffening rod inserted between the coarse-grained bituminous concrete and the medium-grained bituminous concrete; and the pavement layer is formed above the asphalt concrete layer. The invention can drain water quickly, improve the driving safety of the bus rapid transit in rainy days, control the pavement settlement, perform effective jacking and timely response and prolong the service life of the bus rapid transit roadbed.

Description

Fast bus traveling roadbed

Technical Field

The invention relates to the technical field of municipal construction. More particularly, the present invention relates to a rapid transit vehicle roadbed.

Background

The application of Bus Rapid Transit (BRT) in China is more and more extensive, most of BRT special road surfaces in China adopt asphalt road surfaces, early damage of different degrees occurs in the process of construction and use, and not only is the traffic influence caused to social traffic, but also great loss is caused economically. The problem of early damage to the subgrade and pavement of BRT-only roadways has attracted considerable attention.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

Still another object of the present invention is to provide a rapid transit roadbed, which can rapidly drain water, improve the safety of rapid transit driving in rainy days, simultaneously control the pavement settlement, and effectively jack up and respond in time, thereby improving the service life of the rapid transit roadbed.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a rapid transit vehicle roadbed comprising, arranged from bottom to top in sequence:

the soft soil base layer is formed by leveling and tamping soft soil, and a main drainage pipe is embedded in the soft soil base layer and is communicated with a municipal drainage pipeline;

the gravel layer is formed by pouring gravel and cement above the soft soil base layer, a retaining wall, a bearing frame and a monitoring structure are arranged inside the gravel layer, the monitoring structure comprises bagged quicklime, a water delivery pipe, an electromagnetic valve and a trigger switch, the bearing frame is positioned inside the retaining wall to contain the bagged quicklime, and the trigger switch is triggered by settlement to enable the electromagnetic valve to be electrified to input water into the bagged quicklime;

the gravel layer is formed by pouring gravel and cement above the gravel layer, and a water tank is arranged inside the gravel layer;

the brick layer permeates water, it forms for the brick body above the rubble layer, pave the water-proof membrane between rubble layer and the brick layer permeates water, the middle part of the brick layer permeates water is equipped with the water-proof board and locates in the permeable structure of the water-proof board, its top surface is parallel and level with the brick layer permeates water, the permeable structure includes that the prefabricated brick is folded up and down, form the tortuous path of permeating water, the brick layer permeates water below the water-proof board has the pore along vertical reservation, permeate the pore and communicate with the said water tank, the pore above the said water tank has water outlet pipeline and communicates with said main sewer, the sidewall of the said water tank communicates with said raceway;

the asphalt concrete layer is formed above the water permeable brick layer and comprises coarse asphalt concrete below the asphalt concrete layer, medium asphalt concrete above the asphalt concrete layer and stiffening rods inserted between the coarse asphalt concrete and the medium asphalt concrete;

a pavement layer formed over the asphalt concrete layer.

Preferably, the road center line of the road surface layer is slightly higher than the road shoulder, and the road shoulder is provided with a drainage channel and is communicated with the drainage main pipe through a pipeline.

Preferably, the trigger switch includes:

the inductive switch is electrically connected with the electromagnetic valve;

the protective pressure spring is sleeved on the periphery of the inductive switch and is higher than the inductive switch when naturally extending;

and the touch pressure rod is vertically arranged above the induction switch, and a touch pressure surface is formed at the bottom end of the touch pressure rod.

Preferably, the periphery of the trigger switch is provided with a protective wall, the protective wall is higher than the natural extension height of the protective pressure spring, and the size of a cavity surrounded by the protective wall is slightly larger than the contact surface.

Preferably, the top end of the stiffening rod is provided with a claw.

Preferably, the prefabricated bricks comprise L-shaped bricks positioned at two sides and T-shaped bricks positioned in the middle and buckled up and down in sequence.

Preferably, a vertical supporting structure is further arranged inside the permeable brick layer, and the vertical supporting structure comprises supporting piles, vertical supporting nets and horizontal supporting rings.

The invention at least comprises the following beneficial effects:

firstly, the soft soil base layer, the gravel layer, the permeable brick layer, the asphalt concrete layer and the pavement layer are sequentially arranged from bottom to top, so that water can be drained quickly, the driving safety of the bus rapid transit in rainy days is improved, meanwhile, the pavement settlement is controlled, effective jacking and timely response are carried out, and the service life of the bus rapid transit roadbed is prolonged;

secondly, the soft soil base layer is leveled and tamped through arrangement, and the drainage header pipe is pre-buried for rapid drainage, the soft soil base layer below the gravel layer is protected, rainwater is prevented from permeating into the roadbed, soil loss caused by excessive soil moisture is prevented, meanwhile, the retaining wall is arranged for preventing bagged quick lime from laterally deforming and extruding the existing gravel layer, the pavement settlement is convenient to monitor, when a certain pavement subsides, a corresponding monitoring structure below the retaining wall is detected and maintained, the trigger switch can select infrared induction and can also select a displacement sensor and the like, when the roadbed subsides, the trigger switch is triggered by the electromagnetic valve to be powered on and closed in a waterway, the water conveying pipe conveys water from the upper water tank, the water conveying pipe injects water into the bagged quick lime, the bagged quick lime absorbs water to expand and jack up through the quick lime, the volume is slowly increased, the pavement settlement is compensated, the bearing frame forms a component for limiting the appearance of the bagged quick lime, and the bagged quick lime can be effectively fixed, the bottom of the monitoring device is ensured to be flat to form a good supporting effect, the number of the bearing frames corresponds to that of the monitoring structures, and the number of the bagged quicklime can be multiple, and the bagged quicklime is respectively communicated with the water delivery pipe through the water delivery branch pipes, so that a good expansion jacking effect is formed; the gravel layer compacts the gravel layer to avoid the softening of soil;

thirdly, the water permeable brick layer is provided with a water permeable structure for permeating and collecting the accumulated water on the road surface, the prefabricated bricks of the water permeable structure can be overlapped or buckled by arc-shaped bricks to form a zigzag water permeable path, water-stop sheets are arranged to discharge rainwater to the water permeable bricks, so that a large amount of rainwater on the road surface is prevented from being collected with rainwater in the soil to form massive garbage, the road surface is kept purified and the roadbed is prevented from softening, the water permeable bricks are respectively arranged at the periphery and below the water permeable structure, the formed pore channels are convenient for water to enter the water tank, the flow rate of the water in the water tank is increased, when too much rainwater is generated, the rainwater can be quickly discharged from a water outlet pipeline, the drainage efficiency is improved, when the rainwater is less, the rainwater can store the purified water in the water tank and is communicated with a water delivery pipe, the water delivery pipe is provided with a water pump, and when the water is required, the purified water flows out of the water tank; the asphalt concrete layer comprises asphalt retarding soil with a fine upper part and a coarse lower part and is used for supporting the upper pavement, the coarse asphalt concrete at the lower part is a main load-bearing structure and improves the structural integrity of the pavement, the design of the vertical stiffening rods can improve the connection firmness of the coarse asphalt concrete and the medium-grain asphalt concrete and the structural stability, and the stiffening rods can select reinforcing steel bundles and can bear vertical load; the pavement layer is used for the bus rapid transit, has high requirements on structural integrity and flatness, and prevents potholes to ensure the driving safety;

fourthly, the road surface layer is designed to be high in the middle and high in the bottoms of two sides, and the drainage grooves in the two sides of the road surface can quickly collect rainwater on the road surface and discharge the rainwater through a drainage main pipe, so that excessive accumulated water on the road surface is avoided; the trigger switch is designed into an inductive switch, a protective pressure spring and a contact pressure rod, can be quickly monitored and quickly responds, water is conveyed to bagged quicklime through a water conveying pipe only when the pavement is settled and deformed, when a certain pavement is settled, the contact pressure rod below is subjected to downward pressure and moves downwards to compress the protective pressure spring, the storage force of the protective pressure spring in the compression process is gradually exposed out of the inductive switch, the contact pressure surface of the contact pressure rod is a bulging surface to trigger the inductive switch to be closed, and when the pavement is gradually jacked up, the elastic force of the protective pressure spring pushes the contact pressure rod to reset; the design of the protective wall reduces the advancing resistance of the contact pressure rod when the ground is settled, so that the corresponding operation at the first time is facilitated; the design of the claw teeth can transfer stress through the anchoring effect of the pile body; the L-shaped bricks and the T-shaped bricks are spliced in a plurality of rows and columns in a high mode, so that a composite water filtering and seepage structure can be formed, carried silt is reduced, and the purification degree of water stored in the water tank is improved; the supporting structure is designed into the supporting pile, the supporting net and the supporting ring, so that the structure can be reinforced, and the stability of the permeable brick layer is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

fig. 2 is an enlarged view of a in fig. 1 according to the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

As shown in fig. 1, the invention provides a rapid transit roadbed, which comprises, from bottom to top:

the soft soil base layer 110 is formed by leveling and tamping soft soil, and a main drainage pipe 120 is embedded in the soft soil base layer 110 and is communicated with municipal drainage pipelines;

a gravel layer 210 formed by pouring gravel and cement above the soft soil base layer 110, wherein a retaining wall, a bearing frame and a monitoring structure are arranged inside the gravel layer 210, the monitoring structure comprises bagged quicklime 220, a water delivery pipe, an electromagnetic valve and a trigger switch, the bearing frame is positioned inside the retaining wall to contain the bagged quicklime 220, and the trigger switch is triggered by settlement to enable the electromagnetic valve to be electrified to input water to the bagged quicklime 220;

a gravel layer 310 formed by pouring gravel and cement on the gravel layer 210, wherein a water tank 320 is arranged inside the gravel layer 310;

the brick layer 410 is a brick body formed above the rubble layer 310, a water-stop film 420 is laid between the rubble layer 310 and the brick layer 410, a water-stop plate 430 and a water-stop structure arranged on the water-stop plate 430 are arranged in the middle of the brick layer 410, the top surface of the brick layer is flush with the brick layer 410, the water-stop structure comprises prefabricated bricks 440 which are vertically stacked to form a zigzag water-stop path, a hole is reserved in the brick layer 410 below the water-stop plate 430 along the vertical direction, the hole is communicated with the water tank 320, a water outlet pipeline is arranged in the hole above the water tank 320 and is communicated with the main drain pipe 120, and the side wall of the water tank 320 is communicated with the water delivery pipeline;

an asphalt concrete layer 510 formed above the water permeable brick layer 410, the asphalt concrete layer 510 including coarse asphalt concrete below and medium asphalt concrete above, and a stiffener 520 interposed therebetween;

a pavement layer 610 formed over the asphalt concrete layer 510.

In the technical scheme, through the soft soil base layer 110, the gravel layer 210, the gravel layer 310, the water permeable brick layer 410, the asphalt concrete layer 510 and the pavement layer 610 which are sequentially arranged from bottom to top, water can be drained quickly, the driving safety of the bus rapid transit in rainy days is improved, meanwhile, the pavement settlement is controlled, effective jacking and timely response are carried out, and the service life of the bus rapid transit roadbed is prolonged.

The soft soil base layer 110 is leveled and tamped through arrangement, the pre-buried drainage main pipe 120 is used for rapid drainage, the soft soil base layer 110 below the gravel layer 210 is protected, rainwater is prevented from permeating into a roadbed, soil loss caused by excessive soil moisture is prevented, meanwhile, a retaining wall is arranged to prevent bagged quick lime 220 from laterally deforming and extruding the existing gravel layer 210, pavement settlement is convenient to monitor, when a certain pavement subsides, a corresponding monitoring structure below the roadbed is detected and maintained, a trigger switch can select infrared induction and a displacement sensor and the like, when the pavement subsides, the trigger switch is triggered by a solenoid valve to switch on a power-on waterway to be closed, a water conveying pipe is conveyed by an upper water tank 320, the water conveying pipe is filled into the bagged quick lime 220, the bagged quick lime 220 is jacked up through water absorption expansion of quick lime, the volume is slowly increased, the pavement settlement is compensated, a bearing frame forms a component for limiting the appearance of the bagged quick lime 220, and the bagged quick lime 220 can be effectively fixed, the bottom of the device is ensured to be flat to form a good supporting effect, the number of the bearing frames corresponds to that of the monitoring structures, and a plurality of bagged quicklime 220 can be communicated with the water delivery pipe through the water delivery branch pipes respectively, so that a good expansion jacking effect can be formed; the gravel layer 310 compacts the gravel layer 210 to prevent soil from softening.

The water permeable brick layer 410 is designed with a water permeable structure for seeping and collecting accumulated water on the road surface, the precast bricks 440 of the water permeable structure can be overlapped or buckled by arc-shaped bricks to form a zigzag water permeable path, the water-stop sheet 430 is arranged to discharge rainwater to the water permeable bricks, so that a large amount of rainwater on the road surface is prevented from being collected with rainwater in soil to form massive garbage, thereby purifying the road surface and preventing softening a roadbed, the water permeable bricks are respectively arranged at the periphery and below the water permeable structure, the formed pore channels are convenient for water to enter the water tank 320, the flow rate of the water in the water tank 320 is increased, when too much rainwater is discharged from a water outlet pipeline, the drainage efficiency is improved, when less rainwater is, the water can be stored in the water tank 320 and is communicated with a water delivery pipe, the water delivery pipe is provided with a water pump, and when water is needed, purified water flows out of the water tank 320; asphalt concrete layer 510 includes the pitch slow setting soil of upper fine and lower thick, and the bearing top road surface, below coarse grain asphalt concrete are main load structure, improve the structural integrity on road surface, and the design of vertically stiffener 520 can improve the fastness of being connected of coarse grain asphalt concrete and medium grain asphalt concrete and the stability of structure, and the stiffener 520 can select the reinforcing bar bundle, can bear vertical load.

In another technical solution, the road center line of the road surface layer 610 is slightly higher than the road shoulder, and the road shoulder is provided with a drainage channel and is communicated with the drainage main 120 through a pipeline. The pavement layer 610 is designed to be high in the middle and at the bottom of two sides, and the drainage grooves on two sides of the pavement can quickly collect rainwater on the pavement and discharge the rainwater through the drainage main pipe 120, so that excessive surface water is avoided. The supporting structure is designed into supporting piles, supporting nets and supporting rings, so that the structure can be reinforced, and the stability of the permeable brick layer 410 is improved.

In another embodiment, as shown in fig. 2, the trigger switch includes:

the inductive switch is electrically connected with the electromagnetic valve;

In the technical scheme, be inductive switch with the trigger switch design, the protection pressure spring, touch the depression bar, can rapid monitoring and respond rapidly, only just through the raceway to the 220 water delivery of quick lime in bags when the road surface subsides deformation, when a certain road surface subsides, the depression bar that touches of below receives decurrent pressure and moves down to compression protection pressure spring, inductive switch is exposed simultaneously gradually to the process storage power of protection pressure spring compression, touch the face that touches of depression bar and trigger inductive switch closure for the face that swells, when the road surface is by jack-up gradually, the elastic force of protection pressure spring pushes away the depression bar and resets.

In another technical scheme, a protective wall is arranged on the periphery of the trigger switch and is higher than the natural extension height of the protective pressure spring, and the size of a cavity surrounded by the protective wall is slightly larger than the contact surface. The design of protection wall reduces the resistance of marcing of touching the depression bar when ground subsides, and the very first time corresponding operation of being convenient for.

In another technical solution, the top end of the stiffening rod 520 is provided with a claw. The design of the claw teeth can transmit stress through the anchoring effect of the pile body.

In another technical scheme, the prefabricated bricks 440 include L-shaped bricks located at both sides and T-shaped bricks located in the middle and fastened in sequence from top to bottom. The L-shaped bricks and the T-shaped bricks are spliced in a plurality of rows and columns in a high mode, so that a composite water filtering and water permeating structure can be formed, carried silt is reduced, and the water storage purification degree of the water tank 320 is improved.

In another technical solution, a vertical supporting structure is further disposed inside the permeable brick layer 410, and the vertical supporting structure includes supporting piles, vertical supporting nets, and horizontal supporting rings. The pavement layer 610 is used for bus rapid transit, has high requirements on structural integrity and flatness, and can prevent potholes to ensure driving safety.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.

Claims

1. Bus rapid transit roadbed, its characterized in that includes that from bottom to top sets gradually:

the monitoring structure comprises bagged quicklime, a water delivery pipe, an electromagnetic valve and a trigger switch, the bearing frame is positioned in the retaining wall to contain the bagged quicklime, and the trigger switch is triggered by settlement to electrify the electromagnetic valve to input water into the bagged quicklime;

the brick layer permeates water, it forms for the brick body above the rubble layer, lay the water-proof membrane between rubble layer and the brick layer permeates water, the brick layer middle part permeates water is equipped with the water-proof sheet and locates in the permeable structure above the water-proof sheet, the permeable structure top surface is parallel and level with the brick layer permeates water, the permeable structure includes that the prefabricated brick is overlapped from top to bottom, form tortuous path of permeating water, the brick layer permeates water below the water-proof sheet has pore along vertical reservation, the pore is linked with the water tank, the pore above the water tank has the outlet conduit and is linked with the main sewer, the lateral wall of the water tank is linked with the raceway, the raceway is transported water by the water tank above, the raceway is to the water injection of bagged lime;

a pavement layer formed over the asphalt concrete layer.

2. A rapid transit vehicle roadbed as claimed in claim 1, wherein the road surface layer has a road centerline slightly higher than a road shoulder to allow rainwater to smoothly flow from the road centerline to the road shoulder, the road shoulder being provided with a drainage channel and communicating with the drainage header pipe through a pipeline.

3. A bus rapid travel base according to claim 2, wherein the trigger switch comprises:

the inductive switch is electrically connected with the electromagnetic valve;

4. The rapid transit roadbed of claim 3, wherein the periphery of the trigger switch is provided with a protective wall which is higher than the natural extension height of the protective compression spring, and the size of a chamber which is surrounded by the protective compression spring is slightly larger than the contact surface, so that the contact surface can just move up and down in the chamber.

5. The rapid transit roadbed of claim 4, wherein the top end of the stiffening rod is provided with a claw.

6. The rapid transit roadbed of claim 5, wherein the prefabricated bricks comprise L-shaped bricks at two sides and T-shaped bricks in the middle, wherein the T-shaped bricks are sequentially buckled up and down.

7. A rapid public transport vehicle roadbed according to claim 6, wherein a vertical supporting structure is further arranged inside the permeable brick layer, and comprises supporting piles, a vertical supporting net and a horizontal supporting ring.