CN115075071A - Bridge traffic conversion belt between tunnels and design method thereof - Google Patents
Bridge traffic conversion belt between tunnels and design method thereof Download PDFInfo
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- CN115075071A CN115075071A CN202210688161.9A CN202210688161A CN115075071A CN 115075071 A CN115075071 A CN 115075071A CN 202210688161 A CN202210688161 A CN 202210688161A CN 115075071 A CN115075071 A CN 115075071A
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- 238000012546 transfer Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000010920 waste tyre Substances 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
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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
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
- E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
- E01F7/045—Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a traffic conversion belt for a bridge between tunnels and a design method thereof, compared with the prior art, the invention calculates the opening length of the traffic conversion belt based on the basic conditions of the driving speed, the distance between the left and right frames and the S-shaped turning radius, further optimizes the length of the traffic conversion belt, ensures that the conversion belt can resist certain falling rock impact by arranging a safety protection shed, a falling rock buffer measure and other protection structures, can ensure the operation safety of the bridge between tunnels, can keep the road smooth in emergency situations, and simultaneously reduces the construction cost, the road surface maintenance cost of the conversion belt by fully utilizing waste materials such as waste tires, saves energy, protects the environment and is beneficial to reducing the carbon consumption.
Description
Technical Field
The invention relates to the technical field of highway tunnels, in particular to an inter-tunnel bridge traffic conversion belt and a design method thereof.
Background
The method is characterized in that a plurality of high-grade roads and railways are built in mountainous areas, such as recently developed Kun railways, Sichuan-Tibetan railways, Jinshajiang expressway and the like, the path percentage of tunnels exceeds 50%, the tunnels are bridged when meeting water, holes are drilled when meeting mountains, and more tunnels are built. Many sections are that a tunnel is connected with a bridge and then connected with the tunnel, due to complicated landforms, mountain heights and slopes are steep, the weathering of rock strata is serious, dangerous rocks fall down on a hill above the bridge between the tunnels, the operation safety of roads is affected, such as the rocks fall down to endanger the bridge at Yakang high speed, Yaxi high speed and the like, the repair period of the bridge is long, the safety of the bridge between the tunnels in an extra-long tunnel group is particularly important, and due to the limitation of sight lines, the situation that a slope surface cannot be seen in the tunnel is easy to occur, so that the safety problem is easy to occur. Safety is introduced into a redundancy principle, the time and probability of safety occurrence are not easy to predict, but how to reduce loss after falling rocks and timely recover traffic are very necessary. In recent years, engineers and technicians do much work in this regard, such as installing traffic conversion belts in tunnels, steel sheds on main bridges, and the like. However, the method has the problems that the line of sight in the tunnel is poor, the traffic conversion zone in the tunnel is hardly used at present, the manufacturing cost is extremely expensive, the section is large, intersections are multiple, the construction risk is high, and owners call for canceling the structure. Meanwhile, in order to avoid falling rocks, the main bridge is provided with the steel shed tunnel, and is only limited to conventional bridges such as a conventional simply supported girder bridge, and the steel shed tunnel is difficult to design or cannot be arranged for a bridge with a special structure.
At present, the design rule of the road route requires that the length of the traffic conversion belt is not longer than 40m, the number of lanes of 8 lanes and above can be increased properly but not more than 50m, and then no other rule is provided. This results in a design that is set to 40m to meet the design specification, but is wasteful of the project. If the longitudinal length of the traffic conversion belt can be reduced, a lot of construction cost can be saved, and the construction difficulty is reduced. In particular to a separated structure with the bridge distance between the left tunnel and the right tunnel more than 20 meters. In addition, the gully of bridge below between the tunnel is mostly the mud-rock flow ditch, and the bridge is mostly a stride and cross between the tunnel, and these bridges are mostly special structure bridge, and conventional letter bridge is few, or be steel-concrete composite beam, or be the steel pipe arched bridge, how to piece together the width between these special structure bridge of width about, how the conversion tape bridge width of cloth sets up, how three special structure bridge link up the scheduling problem and do not have the solution. Therefore, how to carry out optimal design to the bridge traffic conversion area between the tunnel, to avoiding the falling rocks to strike and guaranteeing the safety of central division area and practice thrift the investment has important meaning.
Disclosure of Invention
The invention aims to solve the technical problem of disclosing a traffic conversion belt structure and a design method for bridges between tunnels.
The invention is realized by the following technical scheme:
a design method of a bridge traffic transition belt between tunnels comprises the following steps:
s1: the position of the traffic conversion belt is arranged between the bridges between the tunnels;
s2: under the conditions of turning around and lane borrowing, the traffic conversion band limit is adoptedBraking velocity V L Coefficient of lateral friction between road surface and tire
And cross slope i h Calculating a turning radius R1 of a turning working condition conversion road and a turning radius R2 of a lane change working condition conversion road, and taking the maximum value of R1 and R2 as the maximum turning radius R of the traffic conversion belt;
s3: according to the formula
Calculating the distance T of the protective shed struts along the length direction of the highway, wherein beta is a circular curve corner of a driving track under a lane borrowing working condition, and R is the maximum turning radius of a traffic conversion zone;
s4: according to the formula
Calculating the minimum length L of the traffic conversion belt, wherein R is the maximum turning radius of the traffic conversion belt, and B is the deviation transverse distance of the driving track under the turning working condition or the lane borrowing working condition;
s5: along the longitudinal length direction of the road, in the range of the minimum length L of the traffic conversion zone, a protective shed pillar is arranged at each interval distance T outside the highway building limits on two sides of the highway, as the left lane and the right lane are both in one-way driving, one of two working conditions for traffic conversion is turning and turning, the other is S-shaped lane changing driving, the position close to the left lane and the right lane in the middle of the traffic conversion zone can not be covered by the driving track of the vehicle all the time, and meanwhile, the driving sight obstacle can not be caused at the point, so that a protective shed fulcrum is arranged at the position, the transverse one-span is adjusted into three-span, the longitudinal one-span is adjusted into two-span, the span of the protective shed is reduced, the bending moment and the shearing force are greatly reduced, and the production and the construction of the protective shed are convenient.
As a preferable aspect of the present invention, in step S1, the distance between the positions of the traffic belt is not more than 4 km in the longitudinal direction of the road.
As a preferred technical solution of the present invention, in step S2, the turning round condition is changed to a half of a turn on the roadDiameter R 1 Changing road turning radius R by lane borrowing working condition 2 Calculated according to the following formula
In the formula, R 1、2 Conversion of road turning radius for traffic conversion with vehicle turning behavior and/or conversion of road turning radius for lane-by-lane driving behavior in units of m, V L The speed is limited for the traffic conversion belt, and the unit km/h,
is the coefficient of transverse friction between road surface and tyre, i h The cross slope is taken according to the direction of the most unfavorable super-high cross slope at the traffic conversion zone.
As a preferable technical scheme of the invention, the traffic conversion belt limits the speed V L Less than or equal to 20 km/h.
As a preferred technical scheme of the invention, the method also comprises the step of converting the turning radius R of the highway under the turning working condition 1 And calculating according to the total calculated length of the articulated train.
As a preferred embodiment of the present invention, in step S4, the u-turn operating mode or the lane-passing operating mode deviates by a lateral distance B that satisfies B-B 1 +B 2 A relation of (A), and B 1 Is the width of the left line first lane or the width of the right line first lane, B 2 The width of the intermediate belt.
A bridge traffic conversion belt between tunnels is designed by adopting a design method of the bridge traffic conversion belt between tunnels, and comprises a protective shed, protective shed pillars and a road; the protection shed is supported by the protection shed support column arranged outside the highway building limit; the highway comprises a bridge width highway and a conversion highway, wherein the protective shed is erected in two spans in the width direction of the bridge width highway and is erected in three spans in the width direction of the conversion highway; one end of the traffic conversion belt is arranged close to the bridge opening between the tunnels, so that the roadbed at the bridge opening between the tunnels can be fully utilized, the engineering quantity is reduced, and the construction is convenient.
As a preferred technical solution of the present invention, in order to ensure the goal of "small stone is not damaged, medium stone is repairable, and large stone is not fallen", not only a protective shed needs to be installed, but also the impact resistance of the road surface of the conversion zone needs to be enhanced, and an impact resistant layer needs to be installed on the road surface of the traffic conversion zone after a waterproof layer is laid on the road surface, so that the road surface of the highway comprises a base layer, a waterproof layer and an impact resistant layer from bottom to top, and the impact resistant layer comprises a rubber layer, a steel plate layer and a crushed stone layer from bottom to top.
In a preferred embodiment of the present invention, the rubber layer has a thickness of 30cm or more, the steel plate layer has a thickness of 16mm or more, and the crushed stone layer has a thickness of 30cm or more.
As a preferred technical scheme of the invention, a deformation joint is arranged between the conversion road and a left/right tunnel bridge of the bridge width road.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method calculates the opening length of the traffic conversion belt of the bridge between tunnels based on the basic conditions of the driving speed, the distance between the left and right frames and the maximum turning radius, and further optimizes the length of the traffic conversion belt. Meanwhile, by arranging the safety protection shed and protection structures such as rockfall buffering measures, the conversion zone can be ensured to resist certain rockfall impact.
1. The technical scheme of the invention has wide practicability, is widely suitable for the safety rescue of the bridge between high-speed tunnels in mountainous areas, and solves the safety rescue problem of the extra-long tunnel group.
2. The invention has simple construction and easy operation, and the materials of the protective shed, the waste tire, the steel plate and the like related to the invention are all easy to obtain and the construction is also conventional.
3. The invention does not need to adopt additional materials, fully utilizes waste materials and waste tires, reduces the road surface maintenance cost of the conversion belt on the basis of reducing the construction cost, meets the requirements of new technology, new materials, new processes and new equipment in engineering construction, effectively promotes the improvement of productivity, reduces the engineering cost, is energy-saving and environment-friendly, and is beneficial to reducing the carbon consumption.
4. The design scheme of the invention is beneficial to improving the high-speed operation safety guarantee in mountainous areas, once a disaster occurs, the alternative scheme can be used for passing, although the speed is slightly reduced during traffic conversion, the design scheme is very beneficial to the high-speed passing in mountainous areas, and particularly can provide a life channel when the disaster occurs.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
fig. 1 shows a flow chart of a design method of a bridge traffic transition zone between tunnels according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a calculation of a length of a traffic transition zone according to an embodiment of the present invention;
FIG. 3 is a schematic view of a shelter of a traffic transformation belt according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a conversion highway shelter and an upright post according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a bridge amplitude road protection shed and an upright post according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating a position of a pillar of a traffic conversion belt according to an embodiment of the present invention;
FIG. 7 is a schematic view of a traffic transition belt pavement structure;
FIG. 8 is a schematic view of a u-turn condition;
fig. 9 is a schematic view of the lane-borrowing condition.
Reference numbers and corresponding part names in the drawings:
1-protective shed support, 2-protective shed, 3-bridge road, 4-conversion road, 5-rubber layer, 6-steel plate layer and 7-rubble layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, materials, or methods have not been described in detail in order to avoid obscuring the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Examples
The method for designing the bridge traffic transition belt between tunnels, as shown in fig. 1-2, provided by the embodiment of the invention, comprises the following steps:
s1: the position of the traffic conversion belt is arranged between the bridges between the tunnels;
s2: limiting the speed V according to the traffic conversion belt under the conditions of turning around and lane borrowing L Coefficient of lateral friction between road surface and tire
And cross slope i h Calculating the turning radius R1 of the turning working condition and the turning half of the lane conditionThe radius R2, and the maximum value of R1 and R2 is taken as the maximum turning radius R of the traffic conversion belt;
s3: according to the formula
Calculating the distance T of the protective shed struts along the length direction of the highway, wherein beta is a circular curve corner of a driving track under a lane borrowing working condition, and R is the maximum turning radius of a traffic conversion zone;
s4: according to the formula
Calculating the minimum length L of the traffic conversion belt, wherein R is the maximum turning radius of the traffic conversion belt, and B is the deviation transverse distance of the driving track under the turning working condition or the lane borrowing working condition;
s5: along the longitudinal length direction of the road, in the range of the minimum length L of the traffic conversion zone, protection shed pillars are arranged at intervals T outside the highway building limits on two sides of the road, and because the lanes on the left and right lines are both in one-way driving, one of two working conditions for traffic conversion is turning around, as shown in figure 8, the other is S-shaped lane changing driving, as shown in figure 9, the positions in the middle of the traffic conversion zone close to the left and right lanes can not be covered by the driving tracks of the vehicles all the time, and meanwhile, the driving sight obstacle can not be caused at the point, so that a protection shed fulcrum is arranged at the position, the transverse one span is adjusted into three spans, and the longitudinal one span is adjusted into two spans, thereby not only reducing the span of the protection shed, but also greatly reducing the bending moment and the shearing force, and being convenient for the production and construction of the protection shed.
In step S1, the distance between the positions of the traffic conversion belts is less than or equal to 4 km along the longitudinal length direction of the road.
In step S2, the turning round condition is used to change the turning radius R of the road 1 And changing the turning radius R of the highway by the working condition of the lane 2 Calculated according to the following formula
In the formula, R 1、2 Conversion of road turning radius for traffic conversion with vehicle turning behavior and/or conversion of road turning radius for lane-by-lane driving behavior in units of m, V L Speed limit for traffic transfer belts, in km/h, usually V L Less than or equal to 20km/h,
is the coefficient of transverse friction between road surface and tyre, i h The cross slope is taken according to the direction of the most unfavorable super-high cross slope at the traffic conversion zone. In addition, the calculated total length of the articulated train is longest, and the required turning radius is largest, namely, as long as the articulated train can turn around, other types of automobiles can turn around, so that the turning radius R of the traffic conversion belt under the turning working condition needs to be calculated according to the calculated total length of the articulated train 1 。
In step S4, the turning operating condition or the borrowing operating condition is shifted by the transverse distance B to satisfy that B is equal to B 1 +B 2 A relation of (A), and B 1 Is the width of the left line first lane or the width of the right line first lane, B 2 The width of the intermediate belt.
A bridge traffic transition zone between tunnels, as shown in figures 3-6, is designed by a design method of the bridge traffic transition zone between tunnels, and comprises a protective shed 2, protective shed pillars 1 and a road; the protection shed 2 is supported by the protection shed support 1 arranged outside the highway building limit; the highway comprises a bridge width highway 3 and a conversion highway 4, wherein the protective shed 2 is erected in two spans in the width direction of the bridge width highway 3, and is erected in three spans in the width direction of the conversion highway 4; one end of the traffic conversion belt is arranged close to the bridge opening between the tunnels, so that the roadbed at the bridge opening between the tunnels can be fully utilized, the engineering quantity is reduced, and the construction is convenient.
In order to ensure the purpose of preventing small stones from being damaged, repairing middle stones and preventing large stones from falling down, a protective shed needs to be arranged, the impact resistance of the road surface of the conversion zone needs to be enhanced, and an impact resistant layer needs to be arranged on the road surface of the traffic conversion zone after a waterproof layer is laid on the road surface, so that the road surface of the highway comprises a base layer, a waterproof layer and an impact resistant layer from bottom to top, as shown in fig. 7, the impact resistant layer comprises a waste tire layer, a steel plate layer and a gravel layer from bottom to top, the thickness of the waste tire layer is greater than or equal to 30cm, the thickness of the steel plate layer is greater than or equal to 16mm, and the thickness of the gravel layer is greater than or equal to 30 cm.
Wherein, for making things convenient for structure safety and construction simple and convenient change highway 4 with set up the movement joint between the bridge of the left/right width of cloth tunnel of bridge width of cloth highway 3.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be understood by those skilled in the art that all or part of the steps of the above facts and methods can be implemented by hardware related to instructions of a program, and the related program or the program can be stored in a computer readable storage medium, and when executed, the program includes the following steps: corresponding method steps are introduced here, and the storage medium may be a ROM/RAM, a magnetic disk, an optical disk, etc.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A design method of a bridge traffic transition belt between tunnels is characterized by comprising the following steps:
s1: the position of the traffic conversion belt is arranged between the bridges between the tunnels;
s2: limiting the speed V according to the traffic conversion belt under the conditions of turning around and lane borrowing L Coefficient of lateral friction between road surface and tire
And cross slope i h Calculating turning radius R of road under turning working condition 1 And changing the turning radius R of the highway by the working condition of the lane 2 And R is 1 And R 2 The maximum value of (2) is used as the maximum turning radius R of the traffic conversion belt;
s3: according to the formula
Calculating the distance T of the protective shed struts along the length direction of the highway, wherein beta is a circular curve corner of a driving track under the lane borrowing working condition, and R is the maximum turning radius of a traffic conversion zone;
s4: according to the formula
Calculating the minimum length L of the traffic conversion belt, wherein R is the maximum turning radius of the traffic conversion belt, and B is the deviation transverse distance of the driving track under the turning working condition or the lane borrowing working condition;
s5: along the longitudinal length direction of the route, in the range of the minimum length L of the traffic conversion zone, protective shed pillars are arranged at intervals of distance T outside building limits on two sides of the highway, and protective sheds are erected.
2. The method as claimed in claim 1, wherein in step S1, the distance between the positions of the traffic belt is not more than 4 km along the longitudinal length direction of the road.
3. The method for designing a bridge-road traffic belt according to claim 1, wherein in step S2, the turning-around operation condition is used for changing the turning radius R of the road 1 And changing the turning radius R of the highway by the working condition of the lane 2 Calculated according to the following formula
In the formula, R 1、2 Converting road turning radius for traffic conversion with vehicle turning driving condition and/or converting road turning radius for lane borrowing driving condition in units of m, V L The speed is limited for the traffic conversion belt, and the unit km/h,
for road surface and tireTransverse coefficient of friction between, i h The cross slope is taken according to the direction of the most unfavorable super-high cross slope at the traffic conversion zone.
4. The design method of bridge traffic belt for tunnel according to claim 3, wherein the traffic belt limits speed V L Less than or equal to 20 km/h.
5. The design method of a bridge-to-tunnel traffic transition belt according to claim 3, further comprising changing a turning radius R of a road according to a turning condition 1 And calculating according to the total calculated length of the articulated train.
6. The method for designing a bridge-to-tunnel traffic belt according to claim 3, wherein in step S4, the driving track is shifted by a lateral distance B satisfying B-B in the U-turn condition or the borrowing condition 1 +B 2 A relation of (A), and B 1 Is the width of the left line first lane or the width of the right line first lane, B 2 The width of the intermediate belt.
7. A bridge traffic transfer belt between tunnels is designed by adopting the design method of the bridge traffic transfer belt between tunnels as claimed in any claim 1 to 6, and is characterized by comprising a protective shed (2), a protective shed pillar (1) and a road; the protection shed (2) is supported by the protection shed support column (1) arranged outside the highway building limit; the highway comprises a bridge width highway (3) and a conversion highway (4), wherein the protective shed (2) is erected in two spans in the width direction of the bridge width highway (3), and is erected in three spans in the width direction of the conversion highway (4); one end of the traffic conversion belt is arranged close to the opening of the bridge between the tunnels.
8. The bridge-to-tunnel traffic conversion belt according to claim 7, wherein the road surface of the road comprises a base layer, a waterproof layer and an impact resistant layer from bottom to top, and the impact resistant layer comprises a rubber layer (5), a steel plate layer (6) and a gravel layer (7) from bottom to top.
9. The bridge-to-tunnel traffic conversion belt according to claim 8, wherein the rubber layer (5) has a thickness of 30cm or more, the steel plate layer (6) has a thickness of 16mm or more, and the gravel layer (7) has a thickness of 30cm or more.
10. The bridge-to-tunnel traffic transition belt according to claim 7, characterized in that a deformation joint is provided between the transition road (4) and the left/right tunnel bridge of the bridge-width road (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210688161.9A CN115075071B (en) | 2022-06-17 | 2022-06-17 | Tunnel bridge traffic conversion belt and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210688161.9A CN115075071B (en) | 2022-06-17 | 2022-06-17 | Tunnel bridge traffic conversion belt and design method thereof |
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| Publication Number | Publication Date |
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| CN115075071A true CN115075071A (en) | 2022-09-20 |
| CN115075071B CN115075071B (en) | 2024-03-26 |
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| CN202210688161.9A Active CN115075071B (en) | 2022-06-17 | 2022-06-17 | Tunnel bridge traffic conversion belt and design method thereof |
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