CN206859125U - A kind of anticollision guardrail structure suitable for Expressway Extension Project - Google Patents

Abstract

The utility model discloses a kind of anticollision guardrail structure suitable for Expressway Extension Project, mainly include guardrail basis, guardrail main body, energy-absorbing power transmission rod member, antiglare shield and delineator, guardrail main body is cast-in-place concrete structure, and the bar-mat reinforcement and reinforced steel of the different ratios of reinforcement are set for highway straight way, bend, big longitudinal gradient section etc.；Described energy-absorbing power transmission rod member is arranged between adjacent barrier, is made up of the service sleeve of two kinds of sizes, round bar transmission rod, 5mm thickness welding steels, and 5mm welding steels width is 240mm, length 100mm, and service sleeve uses Ф 45 and the round steel of Ф 60；After the completion of design safety detection is carried out using 55 tons of truck field vehicle full scale crash tests, as a result show that the guardrail globality is good, anticollision intensity is high, and construction technology is ripe, weight, the incidence of especially big pernicious traffic accident caused by motor vehicle passes through median strip can effectively be reduced in highway, and consider the traffic safety in the bend section of Frequent Accidents, it is worth a wide range of and promotes.

Description

A kind of anticollision guardrail structure suitable for Expressway Extension Project

Technical field

A kind of anticollision guardrail structure suitable for Expressway Extension Project is the utility model is related to, the utility model is whole Body is good, anticollision intensity is high, and construction technology is ripe, can effectively reduce in highway because motor vehicle passes through median strip Weight, the incidence of especially big pernicious traffic accident are caused, belongs to road engineering technical field.

Background technology

China's Freeway Traffic Volume had showed the trend of rapid growth since in recent years, increase in part province volume of traffic year Rate is more than 10%, the close even more than design traffic volume in local section.Shown according to national related accidents statistics, because of road Median barrier protective capacities is relatively low, can not stop that large and medium-sized vehicles traverse median barrier touches with opposed vehicle The problem of hitting and causing secondary major accident is serious；After traditional corrugated beam barrier crashes, maintenance workload is big, Construction period influences road passage capability, and may further induce traffic accident.Certain saves highway section 2012 extremely The traffic accident 33 that accumulative generation motor vehicle passes through median barrier in 3 years in 2014 rises, and causes 5 dead, 4 wounds altogether, applies Work section occurs accident 458 and risen altogether, and cause casualties 58 people, and such accident shows the trend increased year by year, Wherein, the accident 15 for passing through median barrier altogether in 2014 rises, and accounts for the one of 2012 ~ 2014 years 3 years accumulative accidents Half left and right.Because Expressway Central Strip guardrail protective capacities is relatively low, large and medium-sized vehicle occurs traffic accident and easily passes through center Dividing strip, head-on crash occurs with opposed vehicle and further results in weight, especially big pernicious traffic accident, it has also become endangers highway One of major reason of traffic safety.Thus, it is necessary to study a kind of anticollision barrier suitable for Expressway Extension Project Structure, novel guardrail can not only be satisfied with the needs of Expressway Extension Project, and can effectively improve guardrail anticollision etc. Level and security performance, ensure driver drives vehicle security.

The content of the invention

Technical problem to be solved in the utility model is to research and develop a kind of anticollision suitable for Expressway Extension Project Guard bar structure, the guard bar structure for highway, national trunk highway reconstruction and extension project in it is practical, can solve existing The strength problem of concrete guardrail structure, improve travel safety.

To achieve the above object, the technical solution of the utility model is：

A kind of anticollision guardrail structure suitable for Expressway Extension Project, it is characterised in that including guardrail basis, shield Column main body, energy-absorbing power transmission rod member, antiglare shield, delineator；The guardrail basis, using cast-in-place concrete structure, both sides use C30 Concrete cast-in-situ is connected with road surface, and guardrail buried depth is 20cm, and is set continuously inside guardrail basis and cast-in-place concrete Bar-mat reinforcement；The guardrail main body, longitudinal reinforcement uses hot rolling plain bar in bar-mat reinforcement, special for accident-prone road section, condition Different bend section and big longitudinal gradient section, the bar-mat reinforcement and reinforced steel of the different ratios of reinforcement are set, on upper and lower service sleeve Portion respectively adds interior away from runway edge line with 4 continuous light circle longitudinal reinforcements, guarantee casing stability and power transmission, left side side trip 10cm sets vibration graticule, and the top angle of gradient α on guardrail inclined-plane is 88 °, bottom angle of gradient β is 54 °；The energy-absorbing transmission rod Part, it is made up of service sleeve, power transmission reinforcing bar, steel plate, takes plain adapter to add the processing of power transmission reinforcing bar, one end between adjacent two guardrail It is fixed in concrete, one end is fixed in sleeve, and upper and lower service sleeve is respectively Ф 45 and the round steel of Ф 60, on service sleeve, Under be welded with steel plate, thickness 5mm, width 240mm, length 100mm, two steel plates are coplanar, and place plane intersects at set Pipe axis；The antiglare shield, antiglare shield and pedestal are made using hard alloy composite material, are integrally formed, thickness of slab 3.5mm, Color is green, and centrally disposed dividing strip concrete guardrail top, setting spacing is 1m, sets the antiglare shield lamp shielding angle with straightway Degree is no less than 8 °, and the flat, lamp shielding angle in vertical curve section should be 8 ° ~ 15 °, for median strip concrete guardrail and bridge list slope Type concrete guardrail transition section, median strip concrete guardrail and bridge combined type guard bar changeover portion, median strip concrete guardrail and bridge Pier protects guardrail section in corrugated beam barrier changeover portion, bridge, and antiglare shield is arranged on the top of upstream side concrete guardrail；The profile Mark, using adhesive boundary sign, is made up of, delineator is attached to reinforced concrete fence V classes reflective membrane, support and connector On, fixed by expansion bolt, other associated specifications should meet the related request of design document.

The beneficial effects of the utility model are as follows：

Guardrail main body provided by the utility model, the transverse and longitudinal reinforcing bar collocation method of bar-mat reinforcement, it is with reference to fracture mechanics, bullet Property the theory of mechanics such as mechanics, with Abaqus finite element simulation calculations and carry out 55 tons of truck field vehicle full scale crash tests and determine , longitudinal reinforcement uses hot rolling plain bar in bar-mat reinforcement, for the special bend section of accident-prone road section, condition and vertical greatly Slope section, the bar-mat reinforcement and reinforced steel of the different ratios of reinforcement are set, respectively added with 4 continuous light on upper and lower service sleeve top Circle longitudinal reinforcement, ensures casing stability and power transmission, and on the premise of crashworthiness is ensured, the ratio of reinforcement is verified by calculating And experimental verification, construction material dosage is suited measures to local conditions, Guard Rail Structure Design is scientific and reasonable, can effectively save social resources.

Guardrail basis provided by the utility model, both sides are connected using C30 concrete cast-in-situs with road surface, and on guardrail basis An entirety is formed it into setting continuity reinforcement(bar) net inside cast-in-place concrete, guardrail buried depth is 20cm, with traditional F types anticollision Guardrail is compared with reinforced F types anticollision barrier, increases the weight of base foundation, and foundation area is 1.5 ~ 4 times of conventional guard rail, is carried The high bulk strength and stability of guardrail, effectively can be diffused into ground by the collision energy that top is transmitted by basic reinforcement network Face, and being collided in large and medium-sized vehicle, when guardrail is had the trend of overturning, guardrail basis and both sides road surface by with Muscle and connect the unified overall of formation, can be effectively by pavement structure by vehicle by guardrail basis interlocking in pavement structure Deadweight is converted into the anchorage of guardrail, reduces the incidence for causing secondary heavy, especially big traffic accident.

Guardrail main body provided by the utility model, in the theories of mechanics such as rational mechanics, Elasticity, Abaqus finite element moulds Intend on the basis of calculating, the top angle of gradient α on guardrail inclined-plane is 88 °, bottom angle of gradient β is 54 °, using such angle design The break in grade of guardrail can be effectively reduced, and then the Uplifting amount after large and medium-sized vehicle collides can be significantly decreased, In guardrail upper width necessarily and on the premise of guarantee guard rail crashworthiness, guardrail foundation width is using traditional design angle When foundation width 85 ~ 95%, occupation of land can be saved in Expressway Extension Project, further widens side trip, is driver More buffering reaction time are provided after meeting with fortuitous event, reduce accident rate.

The utility model can not only be satisfied with the need of Expressway Extension Project through highway projects Construction practices Will, and guardrail anti-collision level and security performance can be effectively improved, ensure driver drives vehicle security.

Brief description of the drawings

Fig. 1 is a kind of anticollision guardrail structure schematic diagram suitable for Expressway Extension Project of the utility model；Fig. 2 is The utility model guardrail body interior reinforcement structure schematic diagram.

1. antiglare shield in figure, 2. transverse steels, service sleeve on 3., 4. delineators, 5. times service sleeves, 6.5mm welding Steel plate, 7.C30 concrete in-situ layers, 8.C15 concrete backfill layers, 9. guardrail reinforcement foundation nets, 10. longitudinal reinforcements, pre-buried set on 11. Pipe tack power transmission reinforcing bar, 12. times service sleeve tack power transmission reinforcing bars.

Embodiment

In order to be better understood from the utility model, the utility model is made into one below with reference to drawings and the specific embodiments Step describes in detail, and described embodiment is not new to limit this practicality only to illustrate the technical solution of the utility model Type.

A kind of anticollision guardrail structure suitable for Expressway Extension Project of the present utility model, including guardrail basis, Guardrail main body, energy-absorbing power transmission rod member, antiglare shield and delineator.Shown in reference picture 1, C15 concrete is used in median strip Backfill, according to median strip actual grade, C15 concrete backfills layer (8) thickness is about 40cm；Median strip concrete is prevented Guardrail construction is hit, the longitudinal direction construction section length per node guard bar is 30m, and the connection between adjacent two guardrail uses energy-absorbing transmission rod Part, by upper service sleeve (3), upper service sleeve tack power transmission reinforcing bar (11) and lower service sleeve (5), lower service sleeve tack pass Power reinforcing bar (12), 5mm welding steels (6) composition, 1 expansion joint (E.J.) is set per spacing 30m, width 2cm, stitches interior addition joint sealing material； Measurement and positioning, wire is set, one stake is set per 4m along road axis using total powerstation；Aligned in place using slip-form machine, Voluntarily rear adjustment mould elevation tentatively in place and level, are allowed to meet design attitude, tighten bolt and fix, adjustment sensor is allowed to Wire, fixed sensor are close to, slip-form machine aligns finish in place, and concrete mixing can not surpass with transport, the slump of concrete Cross standard slump 1cm；Shown in reference picture 2, the prefabricated work of bar-mat reinforcement of transverse steel (2) and longitudinal reinforcement (10) is carried out, is adopted Constructed with slip-form machine, guardrail sets 1 transverse expansion joint at interval of 20m, width 2cm, stitches interior addition joint sealing material, guardrail every Every 4m, one of baste, cutting-in 4cm, 3~5mm of slit width are set；Curing fluid is first sprayed in maintenance, concrete curing, coordinates concrete dyeing Agent and concrete hardener use, and covering curing cloth sprinkled water maintenance no less than 7 days again, and curing fluid should be sprayed uniformly, after sprinkling Concrete surface must not have color distortion；Solidifying native anticollision guardrail structure both sides side trip is poured using C30, C30 concretes in-situ layer with Prefabricated guardrail reinforcement foundation net (9) is answered before pouring in guardrail basis；Supporting antiglare shield (1) is installed at the top of guardrail, spacing 1m, The facilities such as adhesive boundary sign (4) are installed on guard bar structure.

Claims (1)

1. a kind of anticollision guardrail structure suitable for Expressway Extension Project, it is characterised in that including guardrail basis, guardrail Main body, energy-absorbing power transmission rod member, antiglare shield, delineator；

Described guardrail basis, using cast-in-place concrete structure, both sides are connected using C30 concrete cast-in-situs with road surface, and guardrail buries It is 20cm to put depth, and sets continuity reinforcement(bar) net inside guardrail basis and cast-in-place concrete；

Described guardrail main body, longitudinal reinforcement uses hot rolling plain bar in bar-mat reinforcement, respectively adds on upper and lower service sleeve top and matches somebody with somebody 4 continuous light circle longitudinal reinforcements, left side side trip is interior to set vibration graticule, the top on guardrail inclined-plane away from runway edge line 10cm Angle of gradient α is 88 °, bottom angle of gradient β is 54 °；

Described energy-absorbing power transmission rod member, is made up of service sleeve, power transmission reinforcing bar, steel plate, and plain adapter is taken between adjacent two guardrail Add the processing of power transmission reinforcing bar, one end is fixed in concrete, and one end is fixed in sleeve, and upper and lower service sleeve is respectively Ф 45 With the round steel of Ф 60, service sleeve is upper and lower to be welded with steel plate, thickness 5mm, width 240mm, length 100mm, and two steel plates are same Plane, place plane intersect at casing axis；

Described antiglare shield, antiglare shield and pedestal are made using hard alloy composite material, are integrally formed, thickness of slab 3.5mm, face Color is green, and centrally disposed dividing strip concrete guardrail top, setting spacing is 1m, sets the antiglare shield shading angle with straightway No less than 8 °, the flat, lamp shielding angle in vertical curve section should be 8 °~15 °, for median strip concrete guardrail and bridge list shelving Concrete guardrail transition section, median strip concrete guardrail and bridge combined type guard bar changeover portion, median strip concrete guardrail and bridge ripple Pier protects guardrail section in ellbeam guardrail transition section, bridge, and antiglare shield is arranged on the top of upstream side concrete guardrail；

Described delineator, using adhesive boundary sign, it is made up of V classes reflective membrane, support and connector, delineator is attached to steel On reinforced concrete guardrail, fixed by expansion bolt.