CN112813752A - Harbor type berthing belt structure for large-flow road section and layout method thereof - Google Patents
Harbor type berthing belt structure for large-flow road section and layout method thereof Download PDFInfo
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- CN112813752A CN112813752A CN202011641044.4A CN202011641044A CN112813752A CN 112813752 A CN112813752 A CN 112813752A CN 202011641044 A CN202011641044 A CN 202011641044A CN 112813752 A CN112813752 A CN 112813752A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000010426 asphalt Substances 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims 3
- 238000005266 casting Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 13
- 239000010410 layer Substances 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
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Classifications
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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
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
-
- 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
- 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
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of highways, in particular to a harbor type berthing belt structure for a large-flow road section, which comprises: old road part, old road surface and old roadbed; the splicing wide part is arranged on the outer side of the old road part and further comprises a splicing road surface and a splicing roadbed; the protection part is arranged on the outer side of the splicing width part and comprises a retaining wall; the old pavement and the old roadbed are cut into step shapes and are respectively connected with the spliced pavement and the spliced roadbed; the retaining wall comprises a concrete foundation and an assembled retaining wall arranged on the concrete foundation. The invention adopts a step type connection mode to improve the crack resistance of the widening part, and simultaneously adopts an assembled retaining wall structure to improve the convenience and the safety performance of construction. The invention also discloses a layout method of the bay type berthing belt structure of the high-flow road section.
Description
Technical Field
The invention relates to the technical field of highways, in particular to a harbor type berthing belt structure for a large-flow road section and a layout method thereof.
Background
The bay type parking belt is a temporary parking belt used for emergency parking of vehicles with sudden failures or other reasons on an expressway in order to reduce the influence of traffic events on traffic flow, and has the functions of quickly processing road emergency conditions, quickly recovering traffic and guaranteeing the safety of drivers and passengers in a large-flow traffic state.
The expressway harbor type stopping belt in the prior art is mostly formed by planning and paving at the same time in the expressway design and construction stage, however, various factors after road operation cannot be fully considered in the design process, so that the position and the length of a large-flow road section cannot be accurately estimated, the harbor type stopping belt cannot be accurately and reasonably arranged, and the phenomenon of poor rescue and obstacle clearing efficiency under the expressway congestion state is often caused.
In view of the above problems, the designer is actively making research and innovation based on the practical experience and professional knowledge that is abundant for years in engineering application of such products, and is expected to create a harbor type berthing belt structure for a large-flow road section and a layout method thereof, so that the harbor type berthing belt structure has higher practicability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a large-traffic highway section bay formula berth band structure realizes rationally increasing the bay formula berth band on current highway's basis, improves the guarantee for large-traffic highway section traffic initiative management and control application, and the bay formula berth band that increases satisfies the requirement that the construction is convenient, stable in structure moreover.
In order to achieve the above object, the present invention provides, in one aspect, an estuary parking belt structure for a high-flow road section, comprising:
old road parts including old road surfaces and old road beds;
the splicing wide part is arranged on the outer side of the old road part and further comprises a splicing road surface and a splicing roadbed;
the protection part is arranged on the outer side of the splicing width part and comprises a retaining wall;
the old pavement and the old roadbed are cut into step shapes and are respectively connected with the spliced pavement and the spliced roadbed; the retaining wall comprises a concrete foundation and an assembled retaining wall arranged on the concrete foundation.
Furthermore, the old pavement and the spliced pavement are of a layered structure, emulsified asphalt is smeared on the joint section of the same structural layer, and polyester glass fiber cloth is paved on the joint of the lower-layer asphalt pavement.
Further, the step slope that old road bed and concatenation road bed concatenation had is 1: 0.5.
furthermore, the spliced roadbed is made of a foam light soil material.
Further, the protection panel of the fabricated retaining wall is formed by pouring concrete.
Further, protection part still includes waterproof construction, waterproof construction includes the waterproof geomembrane that the concatenation road bed top layer was laid, lay waterproof geomembrane and towards the horizontal drain pipe of roadside and fix vertical drain pipe on the fabricated barricade.
Furthermore, the protection part also comprises a guard rail, the guard rail is arranged at the top of the assembled guard wall, the bottom of the guard rail is connected with an embedded part, and the embedded part is embedded at the top of the assembled guard wall.
The invention also provides a layout method of the bay type berthing belt structure of the high-flow road section, which comprises the following steps:
monitoring vehicles on the road surface through a camera and a millimeter-scale radar which are arranged on the road;
when the camera monitors that the vehicle stopping time is longer than the preset time, the vehicle accident is judged;
monitoring the average maximum speed of each accident vehicle and the average speed of the road section through a millimeter-scale radar;
counting the average monthly fault vehicle number of each road section;
and setting a parking belt on the road section of which the average monthly number of the fault vehicles is greater than the threshold value.
Further, the length of the parking belt is calculated by the average maximum speed of the accident vehicle and the average vehicle speed of the road section.
The invention has the beneficial effects that: the method monitors the road surface through the camera and the millimeter radar, identifies the road section with higher vehicle accident occurrence frequency, determines the road section with the harbor type parking belt to be laid through grading division according to the whole line accident occurrence frequency, and performs targeted construction according to the road section. In the construction process of the bay type stopping belt, the step type connection mode is adopted to improve the anti-cracking performance of the new and old pavements and roadbeds of the width splicing part; meanwhile, the assembled retaining wall structure is adopted, so that the safety performance is guaranteed, and the convenience of construction is improved; secondly, on the basis of the original design form of the side ditch, a roadside small-interval drain pipe arrangement form is adopted and drained to the side ditch, and the pavement drainage efficiency is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of an estuary dock belt structure for a high-traffic route segment according to an embodiment of the invention;
FIG. 2 is a general cross-sectional view of an estuary dock belt structure in a high-traffic segment according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of a half section of a landing strip in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a splicing structure of a used part and a widening part in an embodiment of the present invention;
FIG. 5 is a schematic view of a retaining wall structure according to an embodiment of the present invention;
fig. 6 is a layout flowchart of an estuary parking belt structure in a high-traffic road section in an embodiment of the invention.
Reference numerals: 10. an old road section; 11. old road surface; 12. old roadbed; 20. a width splicing part; 21. splicing the pavement; 22. splicing the roadbed; 30. a protective portion; 31. a retaining wall; 32. a waterproof structure; 33. a guard rail.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
An estuary dock belt structure for a high flow route section as shown in fig. 1 to 5, comprising an old road section 10, a widening section 20 and a protection section 30, wherein:
the old road part 10 comprises an old road surface 11 and an old roadbed 12;
the widening part 20 is arranged on the outer side of the old road part 10 and further comprises a spliced road surface 21 and a spliced roadbed 22;
the guard portion 30 is provided outside the widening portion 20, and includes a retaining wall 31;
wherein, the old pavement 11 and the old roadbed 12 are cut into step shapes and are respectively connected with the spliced pavement 21 and the spliced roadbed 22; the retaining wall 31 includes a concrete foundation and an assembled retaining wall provided on the concrete foundation.
In the above embodiment, the anti-crack performance of the widening portion 20 is improved by adopting a step connection manner, and the convenience and safety performance of construction are improved by adopting the assembled retaining wall 31 structure.
Specifically, in the embodiment of the present invention, the old pavement 11 and the spliced pavement 21 are in a layered structure, emulsified asphalt is applied to the joint section of the same structural layer, and polyester glass fiber cloth is laid at the joint of the lower-layer asphalt pavement. As shown in fig. 4, the upper three layers are surface layers, and the connection effect of the pavement layer structure is ensured by coating emulsified asphalt and paving polyester glass fiber cloth. In addition, old road surface layer step width is not less than 15cm, through certain thickness, the structural strength of old road surface layer during the guarantee construction to joint strength and structural strength after the guarantee new and old road surface layer concatenation.
Further, the gradient of the step formed by splicing the old roadbed 12 and the spliced roadbed 22 is 1: 0.5. in order to prevent fatigue cracking at the joints of the asphalt subgrade, the original subgrade is cut into steps, and the steps have certain slopes so as to facilitate construction.
Considering the engineering characteristics, construction cheapness, economy and other factors, the spliced roadbed 22 is made of foam light soil materials. It is to be noted here that the light soil is specifically air-bubble mixed.
In the embodiment of the invention, the protective panel of the fabricated retaining wall is formed by pouring concrete. Specifically, the retaining wall 31 is based on C30 hydraulic concrete. The pull rods are arranged at the positions with the interval of 30cm, the protective panel is poured by C30 small stone concrete, and C30 concrete is pressed against the top. And the earth can be excavated by a roadbed before the retaining wall for backfilling. The protection panel adopts C30 small stone concrete placement, sets up through above-mentioned preliminary treatment for the efficiency of construction of barricade improves greatly, sets up through pull rod and C30 coping, has improved the structural strength of barricade moreover. It should be noted here that the concrete C30 means concrete with a compressive strength of C30, and C30 means concrete with a compressive strength of 30 MPa.
In the embodiment of the present invention, the guard portion 30 further includes a waterproof structure 32, and the waterproof structure 32 includes a waterproof geomembrane laid on the top layer of the spliced roadbed 22, a horizontal drain pipe laid on the waterproof geomembrane and directed toward the roadside, and a vertical drain pipe fixed to the fabricated retaining wall. The road surface drainage mainly flows to the outside of a road through a cross slope of the road surface, water is guided to a side ditch through roadside drainage pipes, the collected water flows into a natural ditch through the side ditch, the arrangement intervals of the roadside drainage pipes are 20m, and the side ditch keeps the original design form. The middle zone keeps the original drainage form unchanged, one widened side is lengthened to a roadside ditch by a PE pipe with the same caliber as the original drainage pipe, and water is led out of the roadbed range.
In the embodiment of the present invention, the protection portion 30 further includes a guard rail 33, the guard rail 33 is disposed on the top of the assembled wall, and the bottom of the guard rail 33 is connected to an embedded part, which is embedded in the top of the assembled wall. Be the high risk point to parking way tip position, need set up safer drum-type anticollision barrier, when reducing the traffic accident, because of the secondary injury that the vehicle striking guardrail produced.
The invention also provides a layout method of the harbor type berthing belt structure of the large-flow road section, which comprises the following steps as shown in fig. 6:
s10: monitoring vehicles on the road surface through a camera and a millimeter-scale radar which are arranged on the road; the camera is used for detecting road surface condition simultaneously, and millimeter level radar is used for information such as the speed of a vehicle of test vehicle. The millimeter wave radar is used for collecting traffic data of traffic flow, speed and occupancy rate and assisting in judging the position and the condition of a traffic incident; the camera accurately identifies accurate information such as a license plate, a vehicle type, a motion track and the like of the vehicle;
s20: when the camera monitors that the vehicle stopping time is longer than the preset time, the vehicle accident is judged; the predetermined time may be set by itself, for example, if the vehicle is determined to be in an accident if the vehicle is stationary for five minutes.
S30: monitoring the average maximum speed of each accident vehicle and the average speed of the road section through a millimeter-scale radar; the purpose of testing the maximum speed and the average speed is to calculate the average braking distance of the vehicle in order to determine the length of the parking belt;
s40: counting the average monthly fault vehicle number of each road section; through statistics, the condition of each road section can be known, and further analysis on the road sections with more faults can be determined.
S50: and setting a parking belt on the road section of which the average monthly number of the fault vehicles is greater than the threshold value.
Specifically, the length of the parking belt is calculated by the average maximum speed of the accident vehicle and the average vehicle speed of the road section, and the specific calculation formula is as follows:
in the formula:
l-bay dock length (m);
L1-deceleration lane length (m);
L1S-a deceleration transition length (m);
L2-acceleration lane length (m);
L2S-accelerating the transition length (m);
LW-waiting for a distance (m) for the outer lane to travel through the gap;
V1-average speed of the road section (km/h);
V2-terminal velocity (km/h), Q is taken as 5 km/h;
addeceleration, the deceleration that most drivers adopt when encountering an accident requiring deceleration, being higher than 3.4m/s2Therefore, the scheme is to be 3.4m/s2As a general deceleration value of the bay type parking belt deceleration lane;
aracceleration, according to vehicle dynamics, of 2.78m/s2；
By-hard shoulder width;
tw-lane change waiting for an average waiting time that can be inserted into the gap.
In the formula: t a critical vehicle clearance(s), generally taking the value of 4s according to relevant studies; λ -average arrival rate per unit time; q is the maximum service traffic, and the second-level service level is taken in the text; the minimum value of the time interval of the head of tau is generally 1.2s according to the research. The average waiting time t of the one-way four-lane insertable gap can be obtained according to the formulaw＝1.981s。
According to the statistics of radar data, the section average speed is 80km/h, and the minimum length of the harbor docking band is 211 m.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A large-flow road bay dock belt structure, comprising:
old road parts including old road surfaces and old road beds;
the splicing wide part is arranged on the outer side of the old road part and further comprises a splicing road surface and a splicing roadbed;
the protection part is arranged on the outer side of the splicing width part and comprises a retaining wall;
the old pavement and the old roadbed are cut into step shapes and are respectively connected with the spliced pavement and the spliced roadbed; the retaining wall comprises a concrete foundation and an assembled retaining wall arranged on the concrete foundation.
2. The structure of the harbor type berthing belt for the large-flow road section as claimed in claim 1, wherein the old road surface and the spliced road surface are layered, emulsified asphalt is applied to the joint section of the same structural layer, and polyester glass fiber cloth is laid at the joint section of the lower asphalt road surface.
3. The structure of a large-flow port bay dock berth according to claim 1, wherein the slope of the step formed by splicing the old roadbed and the spliced roadbed is 1: 0.5.
4. the harbor berthing belt structure for large traffic road sections according to claim 1, wherein the spliced roadbed is made of foamed lightweight soil material.
5. The structure of a large flow road harbor berthing belt according to claim 1, wherein the protective panels of the fabricated barricade are formed by casting concrete.
6. The structure of a large-traffic road bay dock-type dock belt according to claim 1, wherein said protective section further comprises a waterproofing structure comprising a waterproofing geomembrane laid on said spliced subgrade top layer, a horizontal drainage pipe laid on said waterproofing geomembrane and directed toward the road side, and a vertical drainage pipe fixed on said fabricated retaining wall.
7. The structure of the harbor berthing belt in the high-flow road section according to claim 1, wherein the protection part further comprises a guard rail, the guard rail is arranged on the top of the assembled retaining wall, the bottom of the guard rail is connected with an embedded part, and the embedded part is embedded in the top of the assembled retaining wall.
8. A layout method of a large-flow road section harbor type berthing belt structure is characterized by comprising the following steps:
monitoring vehicles on the road surface through a camera and a millimeter-scale radar which are arranged on the road;
when the camera monitors that the vehicle stopping time is longer than the preset time, the vehicle accident is judged;
monitoring the average maximum speed of each accident vehicle and the average speed of the road section through a millimeter-scale radar;
counting the average monthly fault vehicle number of each road section;
and setting a parking belt on the road section of which the average monthly number of the fault vehicles is greater than the threshold value.
9. The method of claim 8, wherein the length of the landing strip is calculated from the average maximum speed of the emergency vehicle and the average vehicle speed for the segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011641044.4A CN112813752A (en) | 2020-12-31 | 2020-12-31 | Harbor type berthing belt structure for large-flow road section and layout method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011641044.4A CN112813752A (en) | 2020-12-31 | 2020-12-31 | Harbor type berthing belt structure for large-flow road section and layout method thereof |
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| CN112813752A true CN112813752A (en) | 2021-05-18 |
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