CN115652710A - Temporary construction method for highway reconstruction and extension - Google Patents

Abstract

The invention provides a construction method for reconstruction and extension of a highway, which comprises the following steps: reinforcing the corrugated plate of the old road, removing the isolation net, and performing roadbed filling construction of the newly built road; installing a movable steel guardrail on the inner side of the corrugated plate, dismantling the corrugated plate, and carrying out pavement laying construction of a newly constructed road; after construction is finished, corrugated plates are installed on two sides of a highway; after the corrugated plate is installed, reconstruction and extension construction of the bidirectional pavement is completed through a multiple-time guide reconstruction scheme. The method provided by the invention can be used for carrying out the expansion and reconstruction construction of the highway on the basis of ensuring the normal safe traffic of vehicles, thereby achieving the protection level of the highway, effectively protecting the construction area and personnel, improving the construction efficiency, and ensuring the quality and quantity to finish the reconstruction and expansion engineering of the highway.

Description

Temporary construction method for highway reconstruction and extension

Technical Field

The invention relates to the technical field of road construction, in particular to a temporary construction method for highway reconstruction and extension.

Background

Along with the continuous increase of the traffic flow, the road transportation pressure is higher and higher, and the promotion of highway reconstruction and extension projects is imperative. Meanwhile, because the traffic volume is increased rapidly, the original highway can not meet the current traffic requirements, so that the original highway is urgently needed to be reconstructed and expanded.

The expressway rebuilding and expansion project is generally implemented on a road on which a vehicle is built, and usually needs a long construction period, so that the expressway rebuilding and expansion project needs to be implemented under the condition of not interrupting traffic in the construction process. In particular, the highway has high traffic protection requirements and tight construction period requirements, when a construction area occupies a traffic lane, the original road surface is narrowed, and in order to facilitate construction, passing vehicles generally need to be forcedly decelerated and the lanes are changed, and slowly run through the construction road section at low speed. In the road section, traffic accidents caused by the fact that vehicles are out of control or the fact that passing vehicles collide with personnel or equipment in a construction area often occur.

In order to ensure normal and safe traffic of the expressway, the protective guard is adopted for active protection and guide modification, so that the requirement on the anti-collision safety of the protective guard is high, and the protective guard needs to have good anti-collision performance to protect construction areas and personnel; meanwhile, the guide and modification can be quickly completed in the guide and modification process so as to improve the construction efficiency.

Disclosure of Invention

In order to solve the technical problems, the invention provides a temporary construction method for highway reconstruction and extension, which is used for reconstructing a highway on the basis of ensuring the normal and safe traffic of vehicles, can quickly realize the highway reconstruction and extension by adopting a movable steel guardrail and an anchorage-free guardrail, achieves the highway protection grade, effectively protects the construction area and personnel, improves the construction efficiency and ensures the quality and quantity.

The invention provides a construction method for reconstruction and extension of a highway, which comprises the following steps:

reinforcing the corrugated plate of the old road, removing the isolation net, and performing roadbed filling construction of the newly built road;

installing a movable steel guardrail on the inner side of the corrugated plate, dismantling the corrugated plate, and carrying out pavement laying construction of a newly constructed road; after construction is finished, corrugated plates are installed on two sides of a highway;

after the corrugated plate is installed, vehicles on the left old road are guided to the left newly-built road, vehicles on the right old road are guided to the left old road, and the first guiding and changing is completed;

closing the right highway, removing the movable steel guardrails in the closed area, renovating the road surface of the right old road, and completing the reconstruction and extension of the right highway after the renovation is finished;

installing an anchoring-free guardrail on a split line of a right road, guiding and changing vehicles on a left old road to the right side of the anchoring-free guardrail, guiding and changing vehicles on a left newly built road to the left side of the anchoring-free guardrail, and finishing the second guiding and changing;

closing the left highway, removing the movable steel guardrails in the closed area, renovating the road surface of the left old road, and completing the reconstruction and extension of the left highway after the renovation is finished;

and (4) guiding and modifying the vehicle on the left side of the anchoring-free guardrail to the left road, finishing the third guiding and modifying, dismantling the anchoring-free guardrail and finishing the construction.

Further, under the condition that the left and right road frames are communicated with the vehicle, roadbed filling construction and pavement laying construction are simultaneously carried out on the left and right road frames.

Furthermore, before the first guide and modification, the position of the movable steel guardrail on the left old road is adjusted, and the movable steel guardrail is moved to the center parting line of the left road.

Furthermore, a median strip is arranged between the left road and the right road, and corresponding median strip openings are arranged in the median strip when the first guide modification, the second guide modification and the third guide modification are carried out.

Furthermore, when guiding and modifying for the third time, the method also comprises the step of closing and reinforcing the opening of the median strip.

Furthermore, when the first guide change, the second guide change and the third guide change are carried out, a guide device is adopted to form a guide angle and a guide channel.

Furthermore, two ends of the guide device are provided with a locking part and a connecting part for connecting the guide device and steering the guide angle.

Furthermore, the movable steel guardrail is formed by sequentially connecting a plurality of movable units and a plurality of fixed units; wherein the content of the first and second substances,

the movable unit comprises a guide unit and a support unit; the bottom of the supporting unit is provided with a sliding part which slides on the road surface; the guide unit is fixedly arranged on the support unit and used for guiding and guiding the vehicle;

the fixing unit is provided with a mounting hole for fixing the guide unit; the bottom of the fixing unit is provided with a fixing part for being fixedly installed on a road surface.

Further, the anchoring-free guardrail comprises a guardrail unit and a base unit; wherein the content of the first and second substances,

mounting holes are formed in the two ends of the guardrail unit and used for being mounted on the base unit;

the two sides of the base unit are provided with fixing holes which are fixed with the mounting holes through bolts.

And further, under the condition that the right road is kept open, the anchoring-free guardrail is dismantled.

The reconstruction and extension construction method disclosed by the invention has the following technical effects: by adopting the movable guardrail, the safety protection level of the highway is met under the action of ensuring guidance, and meanwhile, the construction time for installation and fixation is reduced; the anchoring-free guardrail is adopted on the newly-built pavement, so that the construction safety is improved, and meanwhile, the damage to the newly-built pavement is reduced; the movable guide device is adopted, so that the safety level of a guide channel is met, and guide change conversion can be rapidly and accurately carried out; by the guide and modification design, the reconstruction and expansion of the highway are completed under the condition of ensuring the traffic of the highway, and the traffic closure is not generated; the safety of a construction area is better realized by combining a plurality of guardrails, the construction requirement is met, and the construction is accelerated; various guardrails are made of the same material, and are forged and cut by waste materials, so that the effects of waste utilization, environmental protection and energy conservation are achieved.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

FIG. 1 is a flow chart of a construction method of the present disclosure;

fig. 2 is a sectional structural view of a new road pavement of the construction method of the present disclosure;

FIG. 3 is a schematic illustration of road vehicle travel after new road construction according to the disclosed construction method;

FIG. 4 is a schematic illustration of a first lead vehicle run of the construction method of the present disclosure;

FIG. 5 is a schematic illustration of a second guided vehicle trip of the construction method of the present disclosure;

FIG. 6 is a schematic illustration of a third guided vehicle trip of the disclosed construction method;

FIG. 7 is a schematic illustration of a third lead-modified anchor-free guardrail demolition of the disclosed construction method;

FIG. 8 is a schematic structural view of a mobile steel guard rail of the construction method of the present disclosure;

fig. 9 is a schematic view showing a structure of a guide unit of the construction method of the present disclosure;

FIG. 10 is a second schematic view of the structure of the guiding unit of the construction method of the present disclosure;

FIG. 11 is a schematic structural view of a support base of the construction method of the present disclosure;

fig. 12 is a schematic structural view of a sliding portion of the support base according to the construction method of the present disclosure;

fig. 13 is a schematic view of a fixing structure of a fixing unit of the construction method of the present disclosure;

FIG. 14 is a schematic structural view of an anchor-free guardrail of the construction method of the present disclosure;

FIG. 15 is a schematic view of the construction of the guide apparatus of the construction method of the present disclosure;

fig. 16 is a schematic structural view of a connecting portion of a guide apparatus of a construction method of the present disclosure;

FIG. 17 is a schematic view of a second embodiment of the guide device of the construction method of the present disclosure;

wherein, the corresponding relationship between the reference numbers and the component names in fig. 1-17 is:

1, a corrugated plate;

2 moving steel guard rails, 21 fixing units, 211 anchoring glue, 212 sleeves, 213 ground nails, 214 fixing parts, 22 guide units, 221 connecting rods, 222 corrugated plates, 23 supporting units, 231 supporting seats, 232 sliding parts, 2321 sliding plates and 2322 buffer angles;

3, an anchor-free guardrail, 31 a guardrail unit and 32 a base unit;

4, median banding;

5, a guide device, a 51 guide unit, a 511 male head, a 512 female head and a 52 balancing weight; 53 supporting rods, 54 fixed steel wire ropes, 55 extending connecting rods, 56 anti-collision vehicles and 57 anti-collision cushions;

a, newly building a road, A1 a roadbed and A2 a pavement; b old road and C road surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the term "and/or" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The following describes a construction method for road reconstruction and expansion according to the present invention with reference to fig. 1 to 5, and includes the following steps:

s1: and (3) a new road subgrade filling stage: selecting a construction road section, reinforcing the corrugated plate of the old road B of the road section, removing the isolation net, and performing roadbed A1 filling construction of the newly constructed road A of the road section, as shown in figure 2;

s2: and (3) paving a newly constructed road: installing a movable steel guardrail 2 on the inner side of the corrugated plate, dismantling the corrugated plate, and laying the pavement A2 of the newly built road A as shown in figure 2; after construction is finished, the corrugated plates 1 are installed on two sides of the highway, as shown in figure 3;

s3: and (3) in the old road surface renovating stage: and (4) road guidance is carried out, and under the condition that the left and right road frames are communicated, the old road surface B of the left or right road frame is renovated. The specific guiding and modifying method comprises the following steps:

s31: a first guiding modification stage: after the corrugated plate 1 is installed, the vehicles on the left old road B are guided to the left new road A, the vehicles on the right old road B are guided to the left old road B, and the first guiding and changing are completed, as shown in FIG. 4;

closing the right highway, dismantling the movable steel guardrails 2 in the closed area, renovating the pavement of the right old road B, and completing the rebuilding and expansion of the right highway after renovating;

s32: and a second guiding modification stage: installing an anchoring-free guardrail 3 on a split line of a right road, guiding and changing the vehicles of a left old road B to the right side of the anchoring-free guardrail 3, guiding and changing the vehicles of a left newly-built road A to the left side of the anchoring-free guardrail 3, and finishing the second guiding and changing, as shown in FIG. 5;

closing the left highway, dismantling the movable steel guardrail 2 in the closed area, renovating the road surface of the left old road B, and completing the reconstruction and extension of the left highway after the renovation is finished;

s33: and a third guiding modification stage: and (3) guiding and modifying the vehicle on the left side of the anchoring-free guardrail (3) to a left road, completing the third guiding and modifying, dismantling the anchoring-free guardrail (3) and completing the construction of the bidirectional road section, as shown in fig. 6.

In the above embodiment, in the step S1, the corrugated plate of the old road B in the construction section needs to be reinforced, but guard rails such as the corrugated plate are not arranged on two sides of some roads, for example, at the places where the ground height difference between the highways or two sides of the roads is small and the filling soil is low, at this time, the guard rails need to be installed first, the reinforced corrugated plate can be selected, or the guard rails such as the steel guard rails can be selected to be moved, and after the guard rails are installed, the detachment of the isolation net and the filling construction of the roadbed A1 of the newly constructed road a in the section are performed.

In the above embodiment, as shown in fig. 3, it is defined that the vehicle on the left side of the road travels to the right and the vehicle on the right side of the road travels to the left, for the following detailed description.

In the above embodiment, in the case where the left and right road frames are both open, the left and right road frames are subjected to the roadbed filling construction and the road surface paving construction at the same time. By reinforcing the corrugated plates 1 on the two sides of the highway, the protection level is increased, and the safety of the construction area is improved. Under the safe condition, the construction of the left and right road frames is implemented simultaneously, the construction period can be shortened, and the traffic is ensured.

In this embodiment, in the S1 stage, the reinforcement of the corrugated plate 1 may be divided into: adding a group of corrugated plates to the left side and the right side of the single-row corrugated plate; or the two-wave waved plate is added into a three-wave or four-wave waved plate; or a group of corrugated plates are added on the reverse side of the single-row corrugated plate; or one or more long rectangular pipes are added on the reverse side of the single-row corrugated plate; wherein, the height of newly-increased wave plate can be parallel to or lower than or be higher than with former wave plate, plays the effect that increases the protection level.

In the embodiment, in the S2 stage, the corrugated plates are required to be installed on two sides of the highway after construction is completed, the corrugated plates can be installed on two sides of the highway to form permanent corrugated plates by adopting reinforced corrugated plates which are dismantled before operation, or the beam plates of the reinforced corrugated plates are directly used on permanent corrugated plate guardrails after being dismantled, so that the utilization rate of guardrail products is improved, waste caused by repeated use is avoided, the transportation cost is reduced, and the effects of low carbon, environmental protection and cyclic utilization are achieved. The protection grade of the permanent corrugated plate is increased by changing the direction of the removed reinforced corrugated plate, the work of improving the protection grade of the permanent corrugated plate is advanced to the time of reinforcing the corrugated plate construction, so that the whole construction period is relatively short, no redundant workload is caused, most of the work is to repair or replace the original corrugated plate when the original corrugated plate is damaged or destroyed, and the work can be completed when the corrugated plate is reinforced.

In the above embodiment, before the first guidance and correction, the position of the movable steel fence 2 on the left old road is adjusted, and the movable steel fence 2 is moved to the center line of the left road. This embodiment adopts and removes steel guardrail 2, has firstly guaranteed the protection level, and secondly the position of being convenient for removes, when newly-built road surface ground layer is leveled with old road surface layer, leads for the first time and changes. In order to ensure the balance between the lanes, the moving steel guard rail 2 may be appropriately positionally adjusted to ensure that it is positioned on the center line between the lanes. In the construction process, the mounting position of the movable steel guardrail 2 is approximately at the position of a hard road shoulder at an interval of 1000-1500mm, and a buffer space is reserved, so that construction danger caused by collision of vehicles on the movable steel guardrail 2 when traffic accidents happen is prevented. If in the construction process, the position of the movable steel guardrail 2 does not influence the running of the vehicle on the lane, and the movable steel guardrail can be directly guided and changed without moving.

In the above embodiment, the median 4 is provided between the left road and the right road, and the median 4 is provided with corresponding median openings when the first guidance and modification, the second guidance and modification and the third guidance and modification are performed, as shown in fig. 3 to 5. The median 4 is a protective zone between roads, and when guiding and modifying are carried out, the position and the length of an opening of the median are designed according to the angle and the direction of the guiding and modifying and the length of a guiding and modifying channel by combining the corrugated plates 1 on the two sides of the road and the movable steel guardrails 2 in the road.

In the above embodiment, the guide device 5 is used to form the guide angle and the guide passage in the first guide change, the second guide change, and the third guide change. The connecting portion and the locking portion that can connect are set up at the both ends of guider 5, are connected through connecting portion and removal steel guardrail 2, median strip 4 and exempt from anchor guardrail 3, fix through locking portion. Connecting portion and the portion of screwing can adopt the prefab, realize the high-speed joint when the installation, reduce the engineering time. Wherein, connecting portion in the connection process, still can form locking connection after certain angle with being connected the railing for direction angle's needs. The angle of the guide device 5 is screwed and fixed through the locking part, when the guide angle is converted, the locking part is only required to be loosened, the guide device is integrally rotated by taking the connecting part as a circle center, and the guide device is locked at a specified angle, so that the construction time is reduced to 2-5min, the construction period is greatly shortened, and the operation of workers is reduced.

In the above embodiment, in the third guiding modification, the method further includes closing and reinforcing the opening of the median strip, as shown in fig. 6. The third guiding and changing is to guide and change the vehicles on the left side of the anchoring-free guardrail 3 in the right road frame to the left road frame, at the moment, the vehicles on the left road frame run rightwards, and the vehicles on the right road frame run leftwards. At this time, the middle belt opening in the guide modification process needs to be sealed, and the construction is completed. The reinforcing corrugated plate detached in construction is adopted to repair the middle zone opening, materials are fully utilized, and the purposes of low carbon, environmental protection and cyclic utilization are achieved.

In the above embodiment, in the case where the right-hand road is to be kept open, the anchor-free guard rail 3 is removed.

Before the construction is completed, the anchor-free guardrail 3 needs to be dismantled, as shown in fig. 7, the dismantling process is as follows:

the opening of the middle sub-band is closed, the guide device 5 of the movable steel guardrail on the left side of the highway is reversed, the middle sub-band 4 is connected to the corrugated plate 1 connected with the left side, and vehicles traveling on the right side of the right highway are guided to the left highway; at the moment, the position of the guide device 5 of the right road is fixed, and the construction is carried out on the left side of the anchoring-free guardrail 3 to remove the anchoring-free guardrail 3 under the condition of ensuring that left-going vehicles of the right road pass; and after the anchor-free guardrail 3 is removed, removing the guide device 5 for connecting the right road with the median strip 4 to complete construction.

In the above embodiment, as shown in fig. 8, the moving steel guard rail 2 is composed of a plurality of movable units and a plurality of fixed units 21 connected in sequence; wherein the movable unit comprises a guide unit 22 and a support unit 23; the bottom of the supporting unit 23 is provided with a sliding part which slides on the road surface; the guide unit 22 is fixedly mounted on the support unit 23 and used for guiding and guiding the vehicle; mounting holes are formed in two sides of the fixing unit 21 and used for fixing the guide unit 22; the bottom of the fixing unit 21 is provided with a fixing portion for fixing and mounting on a road surface. The concrete connection combination of the movable steel guard bar 2 can be formed by connecting a plurality of movable units with one fixed unit 21 and then connecting a plurality of movable units, wherein the connection number of the movable units is determined according to the collision avoidance level, the deformation rate and the displacement length of the movable units and the traction force of the fixed unit 21.

In this embodiment, as shown in fig. 9 and 10, the guide unit 22 is provided with a plurality of sets of connection rods 221 or wave plates 222. Each group of connecting rods 221 is formed by one or more connecting rods 221 which are parallel and parallel; one end of the connecting rod 221 is provided with a mounting hole, and the other end is provided with a bolt piece for fixedly connecting with the mounting hole arranged at one end of the adjacent connecting rod 221. An anti-dazzle plate mounting hole is formed in the connecting rod 221 at the top of the guide unit 22 and used for mounting an anti-dazzle plate, and safety is improved. Each group of the corrugated plates 222 is formed by combining two waves and three waves, and mounting holes are formed in two sides of each group of the corrugated plates 222 and used for being mounted on the supporting unit 23. The connecting rod 221 may be one or a combination of several of corrugated plates, i-beams, channel steels, round tube steels, rectangular tube steels, and deformed steels used at the present stage. Or a combination of the connecting rods 221 and the corrugated plate 222 as shown in fig. 10.

In this embodiment, as shown in fig. 9, a resistance portion 223 is arranged between the connecting rod 221 and the connecting rod 221, and the resistance portion 223 is arranged to increase the impact and play a role in resistance, and to prevent glare, and third, a reflective film is arranged on the resistance portion at intervals, so that the function of landscape is achieved on the basis of increasing the driving safety at night, and fourth, the safety protection effect is increased, so that animals and people are prevented from drilling into roads from gaps of the connecting rod, and construction danger is caused. Specifically, the resistance portions may be in a rod-like, sheet-like or net-like structure, and are spaced between the connection rods 221. A safety part 224 is also arranged between the bottom connecting rod 221 of the guide unit 22 and the road base surface, and the safety part 224 can also adopt a rod-shaped, sheet-shaped or net-shaped structure, so that firstly, collision is increased, a certain blocking effect is achieved, secondly, a safety protection effect is achieved, mainly, animals and people outside the road are prevented from entering the road, traffic accidents are avoided, and the safety effect is increased through blocking.

In this embodiment, the connecting rods 221 are fixedly connected with the supporting units 23 through the mounting holes of the connecting rods 221, and also need to be connected with the connecting rods 211, the connecting rods 221 are fixedly connected through connecting pieces, which can be straight plate pieces, the straight plate pieces are inserted into the adjacent connecting rods 221 and fixedly connected through bolt pieces, and the processing is convenient, and the material is easy to save; or a large square pipe fitting is sleeved outside the adjacent end of the adjacent connecting rod 221 and fixedly connected through a bolt piece; or Fang Guanjian, the small square pipe piece is inserted into the opening of the adjacent end of the adjacent connecting piece 221 and is fixedly connected through a bolt piece; the connecting rod 221 can also be a round pipe fitting which is more suitable for being matched with a round pipe, the round pipe fitting is inserted into the opening at the adjacent end of the adjacent connecting rod 221 and is fixedly connected through the bolt piece, and a better splicing and fixing effect is achieved.

In this embodiment, as shown in fig. 9, the supporting unit 23 is provided with a support seat 231; the bottom of the supporting seat 231 is provided with a sliding part 232 which is in contact with a road base surface and is used for supporting and fixing the guide unit 22; the supporting seats 231 are arranged at the end parts or the middle parts of each group of connecting rods 221, and the connecting rods 221 are arranged at the upper parts of the supporting seats 231.

In this embodiment, the supporting seat 231 is different from the installation form of the prior art, which is generally fixed on the road base surface, while the supporting seat 231 of the present invention is assembled in a manner of sliding relative to the road base surface, and different sliding manners are set according to different supporting part material selection, and this arrangement, in the case that the end of the construction method is fixed by the fixing unit 21, when the vehicle is impacted, the guiding unit 22 decomposes a part of the impact force according to the ductility of the steel material itself, and also decomposes the impact force into the friction sliding of the supporting part and the road base surface, so as to play a role of semi-rigid protection for the vehicle, and better realize the protection for the vehicle and the guarantee of the safety of the personnel in the vehicle.

In this embodiment, the bottom of the support seat 231 is provided with a sliding part 232; the sliding portion 232 contacts with the road base surface and is impacted by a force to drive the supporting portion to slide on the road surface. In order to better embody the anti-collision effect of the support seat 231, the bottom of the support seat 231 is subjected to sliding treatment. For example, the bottom of the square steel support seat 231 is polished to reduce the friction with the road base surface as much as possible, so that a part of the friction with the road is lost to be decomposed, but the moving distance of the guide unit 22 is increased, so that the impact force decomposed by the friction is converted into the deformation force and the extension force of the guide unit 22 through the connecting rod 221 to decompose and buffer the impact force, the probability of toppling over due to an overlarge construction method by the friction is reduced, the buffer distance of vehicle impact is increased, and a better protection effect is achieved.

In this embodiment, as shown in the left view of fig. 11, the support seat 231 is in a shape of a Chinese character 'ji', has a narrow top and a wide bottom, and is forged from steel; as shown in fig. 11 and the right drawing, the supporting seat 231 may further adopt a structure of a base and a connecting rod 221, the connecting rod 221 adopts a square tube, the square tube penetrates into the supporting seat 231 to be fixed, or the connecting rod 221 adopts a corrugated plate to play a role in supporting and installing the connecting rod 221, the base increases a contact area with a public road base surface, and the stability is strong. The base of this structure equals the bottom of the supporting seat 231 of other structures, and the structure at both ends is favorable to the installation to dismantle about adopting. Regardless of the structure of the supporting seat 231, the bottom of the supporting seat is in contact with the road surface by a sliding portion, and the supporting seat has a sliding effect when receiving an impact through a grinding or polishing process.

In this embodiment, as shown in fig. 12, the sliding portion 232 is provided with a sliding plate 2321 and a buffer angle 2322; wherein, the sliding plate 2321 is parallel to the road base surface, two side edges are vertically provided with the reinforcing plate 2323, and the reinforcing plate 2323 is installed at the bottom of the supporting seat 231; the buffer angle 2322 is an arc part, is arranged at two ends of the sliding part 232 and forms a round angle with the road base surface; one corner of the buffering corner 2322 is fixedly connected with the side plate of the supporting seat 231, and the other corner is fixedly connected with the sliding plate 2321.

In this embodiment, the buffer angle 2322 may be C-shaped, U-shaped, or other rounded shape. The effect of this is to effectively prevent the moving set of the supporting seat 231 when the supporting seat 231 contacts the base surface of the road. The buffer angle 2322 may be fixed to the supporting seat 231 by welding, riveting, or the like, or may be integrally formed with the supporting seat 231.

It should be noted that in all the above embodiments, the support seat or the sliding part, which is smooth at the bottom, is used for supporting, i.e. contacting with the ground, the sliding component. When the guide unit 22 is subjected to an impact force, the guide unit 22 is turned in the direction of the force, the lower edge of the support seat 231 is in contact with the ground, the edge of the support seat 231 is in contact with the ground under the action of the force, the ground traveling situation occurs, and under the further action of the impact force, the guide unit 22 is in a state of being overturned, so that the safety of the vehicle cannot be guaranteed. When the support seat 231 provided with the sliding portion 232 of the present embodiment encounters impact force, and the guide unit 22 turns over on one side, the arc portion of the buffering angle is in contact with the ground, so that the support seat 231 cannot move to the ground, and due to the continuous smooth outer surface of the arc portion, when the arc portion is in contact with the ground, the guardrail can keep a translational motion state, and the situation that the guardrail turns over is avoided.

In this embodiment, the fixing unit 21 may be a widened supporting unit 231, and only after the sliding portion 232 at the bottom is removed, the fixing portions 214 are provided at both sides of the supporting base 231, and fixed on the road by ground nails.

In this embodiment, the fixing unit 21 may also be a widened upright column and a widened base, and a fixing portion 214 is disposed at a position where the base contacts a base surface of a highway, and the fixing unit is fixed on the highway by ground nails, in which the fixing manner is not limited to be fixed on the ground by nail-shaped structures, but may also be fixed on the ground by anchoring, and may also be fixed by other fixing manners in the prior art. However, in a common construction mode, ground nails are directly driven into the ground, and the ground nail holes damage the road surface to a certain extent, so that the overall structure of the road surface is damaged, and the service life of the road surface is influenced. Therefore, the embodiment adopts the installation mode of the embedded sleeve.

Specifically, as shown in fig. 13, one end of the sleeve 212 is open, and the other end is open or closed, and is a rigid straight pipe. The installation mode of the embedded sleeve is as follows: during road construction, a plurality of prefabricated holes are reserved in corresponding positions in the process of pouring on the pavement C, after the inner walls of the prefabricated holes are coated with the anchoring glue 211, the sleeve 212 is inserted, the sleeve 212 is fixed through the anchoring glue 211, the anchoring glue 211 can fill the gap between the outer wall of the sleeve 212 and the hole wall, the sleeve 212 can be a metal sleeve or a rubber sleeve or a plastic sleeve, and the sleeve 212 can be directly formed by pouring concrete. When the guardrail is installed, the ground nail on the guardrail directly penetrates through the installation hole of the fixing part 214 and is inserted into the sleeve 212 to fix the ground nail, so that the ground nail is prevented from being directly driven into the road surface, and the damage to the road surface when the ground nail is installed is reduced; after the construction is finished, the corresponding ground nail is pulled out of the sleeve 212, the corresponding guardrail can be detached, the prefabricated hole and the sleeve 212 are filled with the building materials which are the same as the road surface, and the prefabricated hole and the sleeve are parallel and level to the road surface, so that the integrity and the attractiveness of the road are guaranteed, and the service life of the road is prolonged.

In the above embodiment, as shown in fig. 14, the anchor-free guard rail 3 includes the guard rail unit 31 and the base unit 32; wherein, both ends of the guardrail unit 31 are provided with mounting holes for mounting on the base unit 32; the base unit 32 is provided with fixing holes at both sides thereof, and is fixed to the mounting holes by bolts.

In this embodiment, the barrier unit 31 employs the movable unit 22 of the moving steel barrier 2, which is combined by a single or multiple sets of connecting rods and corrugated plates; the base unit 32, because of its anchor-free nature, cannot adopt the mechanism of the support unit 23 and needs to be redesigned according to the road protection class. In this embodiment, base unit 32 adopts the structure of the kind of piece of joining in marriage, and the balancing weight can adopt materials such as cement, reinforced concrete and metal, and the balancing weight is the square column shape, or the base is greater than the toper or the several font of top area, utilizes the weight of balancing weight to improve the holistic firm effect of guardrail and the crashproof effect that will reach.

In this embodiment, the weight block is directly contacted with the road base surface, that is, the weight block is directly placed on the road base surface, and the guardrail unit 31 is supported and fixed by its own weight. Such design, firstly guardrail unit 31 can satisfy the needs of direction, secondly receive the striking back of vehicle, utilize the frictional force of balancing weight and highway base plane and guardrail unit 31 self steel's ductility to carry out the buffering of impact force, when the impact force reaches certain degree, still can further carry out the decomposition buffering of impact force through the slip with the highway base plane, reach the protection level.

At current protective equipment, like anti-collision barrel, water horse etc., do not have the anticollision grade of highway construction requirement, and adopt the qualified rail guard of anticollision grade, will install fixedly on newly-built highway base face, thereby can cause the destruction to newly-built road surface, even the fixed orifices of the fixed guardrail of drilling is very little, can fill etc. after the construction is accomplished, but still can destroy the whole aesthetic property on newly-built road surface, also can cause the destruction to the road bed, in order to thoroughly solve this problem, in this embodiment, adopt and exempt from the anchor guardrail, the rail guard of having avoided installing other forms completely is to the destruction on road surface, reached the anticollision grade simultaneously, the security of construction has been increased.

In the above embodiment, as shown in fig. 15, the guiding device 5 includes a guiding unit 51 and a weight block 52, wherein a connecting portion and a locking portion are provided at both ends of the guiding unit 51, the guiding unit is connected to the corrugated plate 1 and the weight block 52 through the connecting portion, and the guiding unit is fixed by the locking portion after the guiding angle is adjusted; the weight block 52 is connected to the fixing unit 23 of the moving steel guard rail 2 to form a guide passage with the other guide 5 disposed opposite thereto.

In this embodiment, the guiding unit 51 may adopt the movable unit 22 of the movable steel fence 2, which is combined by a single group or multiple groups of connecting rods and corrugated plates, and simultaneously, the sliding part 232 of the movable unit 22 contacting with the road base surface is used to realize the sliding on the road base surface, and the characteristic of movable position by simple pushing realizes the quick reversing of the guiding unit 51, and realizes the quick guiding of the guiding device 5; the balancing weight can adopt fixed unit 23 or exempt from base unit 32 of anchor guardrail 3, and one side is connected with removal steel guardrail 2, and one side is connected with movable unit 22, forms the direction and guides. The counterweight 52 acts to support the stably movable unit 22, while increasing the anticollision rating of the guide 5; on the basis of construction conditions and the performance of the movable unit 22, the balancing weight 52 can be omitted, the movable unit 22 can be directly connected between the corrugated plate 1 and the movable steel guardrail 2, and the guiding function can be achieved, and the connection needs to be added at the connection part of the movable unit 22, the corrugated plate 1 and the movable steel guardrail 2, namely the arrangement of the connection part, and the connection part needs to be added as required, so that the stability of the movable unit 22 is improved.

In this embodiment, in order to increase the installation speed and save the construction difficulty, the connection portion may be a connection plate with a specific male head and a specific female head, as shown in fig. 16, the connection portion is composed of two connection plates capable of being connected in an embedded manner, which are a male head 511 and a female head 512, when in installation, the female head 512 is installed in advance on various guardrails already installed on the road, such as the corrugated plate 1, and the male head 511 is installed on the connection rod of the guide unit or the installation side of the corrugated plate, and may be connected through a pin shaft of a pin hole, or may be connected through other methods, such as welding. After the guiding angle of the female head 512 is adjusted, the female head 512 is fixed through the locking part, and when the male head 511 is connected with the female head 512, the male head 511 is inserted into the female head, so that the connection purpose can be achieved, and the installation skill and the installation time are greatly saved. The strength requirement is met through the selection of the material and the size design of the connecting plate, and the style is not limited to the 3-shaped quick-connection connecting plates shown in the figure 16. Solves the problems of the traditional welding and bolt connection method, and is more suitable for the use and installation of the prior galvanized plate guardrail. Because the galvanized sheet material can not be welded by using a welding technology, if welding is not needed, the galvanized sheet needs to be subjected to dezincification and then welded, and after welding, anti-corrosion treatment is carried out, so that the installation of the galvanized sheet can be completed.

In this embodiment, as shown in fig. 17, two support rods 53 are further installed on two sides of the weight 52, the two support rods 53 are installed on different sides of the weight 52 in a connected manner, meanwhile, a fixed steel wire rope 54 is installed on a side of the weight 52 away from the support rods 53, and the other end of the fixed steel wire rope 54 is fixed on the corrugated plate 1, so that the position relationship between the guide unit 51 and the weight 52 is more stable by using the angle of the support rods 53 and the fixed steel wire rope 54 to stabilize the weight 52, thereby ensuring the stabilizing effect of the whole triangular structure. The use of bracing piece 53 and fixed wire rope 54 has also played simultaneously when the vehicle striking, realizes the decomposition of power and more possible increase buffering dynamics, plays better crashproof effect, guarantees the safety of vehicle and construction site. In consideration of actual construction and transportation, the support rod 53 is a telescopic rod in the present embodiment. Specifically speaking, the telescopic link is the telescopic link that can lock, like this, can be according to actual conditions, the inclination of adjustment guider 5, makes its suitability stronger.

In this embodiment, the connection portion may perform the connection of the connection corrugated plate 1 to the guide unit 51 using the extension connection rod 55. By using the extension connecting rod 55, the length of the guide unit 51 can be increased, and the problems that the length of the group of movable units 22 is increased beyond the range and the length of the group of movable units 22 is insufficient can be avoided. The extension connecting rod 55 may be comprised of one to more telescopic rods. Specifically speaking, the telescopic link is the telescopic link that can lock, like this, can be according to actual conditions, adjustment guider 5's guide angle and direction passageway make its suitability stronger.

In order to further protect the vehicle, in the present embodiment, a crash barrier 56 is further provided, and the crash barrier 56 is provided in the vehicle traveling direction in the construction zone. Thus, if the vehicle is driven into the construction area at too high a speed, the vehicle will hit the bumper 56, thereby achieving the purpose of buffering the impact force of the vehicle.

To further protect the vehicle, a crash pad 57 is also provided between the bumper 56 and the stationary cable 54. The crash pad 57 can further realize the buffering and the interception of the vehicle, and meanwhile, the crash pad 57 can also form the placement of the guide unit 51, the balancing weight 52 and the crash pad 57, so that the transportation of the crash pad is realized, and meanwhile, the crash pad can also play a role in warning the vehicle, thereby achieving the purpose of achieving multiple purposes at one stroke.

Through foretell setting, utilize guider 5 not only to play the effect of direction, can also play better crashproof effect to the vehicle, provide the guarantee for the safety of traveling of vehicle.

In this embodiment, the guiding device 5 mainly plays a role of guiding according to the guiding position, such as the guiding of the vehicles on the left and right sides of the median strip 4, and the guiding between adjacent lanes, such as when the guiding device 5 is installed on the median strip 4, the protection function is weakened, and it is not necessary to perform equipment for increasing the protection level, such as the counterweight 52, the supporting rod 53 and the fixed steel wire rope 54, and only the guiding unit 51 is needed, and the guiding unit 51 directly connects the median strip 4 and the movable steel guard rail 2 or the anchor-free guard rail 3 to form guiding guidance.

In the above embodiment, the corrugated plate 1, the movable steel guard rail 2, the non-anchoring guard rail 3, the guide device 5 and the median strip 4 are designed in different structures according to construction characteristics, and in practical application, the corrugated plate 1 can be exchanged, for example, the movable steel guard rail 2 is replaced by the corrugated plate 1, so that the protection level is increased, the two rows of corrugated plates 1 oppositely arranged can be adopted for the structure of the median strip 4, the median strip can be realized by the movable steel guard rail 2, and the protection level of a vehicle is increased. Meanwhile, the anti-dizziness plates are arranged on the guardrails on the two sides of the road and the middle dividing belt, and only mounting holes are needed to be additionally formed above the guardrails for mounting the anti-dizziness plates and the like. Still can increase warning portion above the guardrail, warning portion adopts the steel pipe perpendicular setting, sets up the warning subsides on the steel pipe, increases the warning effect of traveling night.

In this embodiment, in the whole construction guiding operation, not only the combination use of the movable steel guard rail 2, the anchoring-free guard rail 3 and the guiding device 5 can be adopted, but also the corresponding change can be made according to the actual requirement or the requirement of the engineering budget, and the guiding construction is carried out by adopting one or the combination of a plurality of the corrugated plates 1, the movable steel guard rail 2, the anchoring-free guard rail 3, the median strip 4 and the guiding device 5 on the road side and the road of the construction.

In the above embodiment, the connection mode of the male head 511 and the female head 512 of the guide device 5 and the installation mode of the sleeve 212 and the ground nail 213 of the fixing unit of the movable steel fence 2 are common in the construction process, and the fence is fixed on the road base surface by a specific installation and fixing mode and the connection between the fences is performed by a characteristic connection mode.

The reconstruction and extension construction method disclosed by the invention has the following technical effects: by adopting the movable guardrail, the safety protection level of the highway is met under the action of ensuring guidance, and meanwhile, the construction time for installation and fixation is reduced; the anchoring-free guardrail is adopted on the newly-built pavement, so that the construction safety is improved, and meanwhile, the damage to the newly-built pavement is reduced; the movable guide device is adopted, so that the safety level of a guide channel is met, and guide change conversion can be rapidly and accurately carried out; by the guide and modification design, the reconstruction and expansion of the highway are completed under the condition of ensuring the traffic of the highway, and the traffic closure is not generated; the safety of a construction area is better realized by combining a plurality of guardrails, the construction requirement is met, and the construction is accelerated; various guardrails are made of the same material, and are forged and cut by waste materials, so that the effects of waste utilization, environmental protection and energy conservation are achieved.

In the description of the present invention, the terms "connect", "mount", "fix", and the like are used in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A construction method for road reconstruction and expansion is characterized by comprising the following steps:

reinforcing the corrugated plate of the old road, removing the isolation net, and performing roadbed filling construction of the newly built road;

installing a movable steel guardrail on the inner side of the corrugated plate, dismantling the corrugated plate, and carrying out pavement laying construction of a newly constructed road; after construction is finished, corrugated plates are installed on two sides of a highway;

after the corrugated plate is installed, vehicles on the left old road are guided to the left newly-built road, vehicles on the right old road are guided to the left old road, and the first guiding and changing is completed;

closing the right highway, removing the movable steel guardrails in the closed area, renovating the road surface of the right old road, and completing the reconstruction and extension of the right highway after the renovation is finished;

installing an anchoring-free guardrail on a split line of a right road, guiding and changing vehicles on a left old road to the right side of the anchoring-free guardrail, guiding and changing vehicles on a left newly built road to the left side of the anchoring-free guardrail, and finishing the second guiding and changing;

closing the left highway, dismantling the movable steel guardrails in the closed area, renovating the pavement of the left old highway, and completing the renovation and the extension of the left highway after the renovation;

and (4) guiding and modifying the vehicle on the left side of the anchoring-free guardrail to the left road, completing the third guiding and modifying, dismantling the anchoring-free guardrail and completing construction.

2. The construction method according to claim 1,

and under the condition that the left and right road frames are communicated with the vehicle, the left and right road frames are simultaneously subjected to roadbed filling construction and pavement laying construction.

3. The construction method according to claim 1,

and before the first guide and modification, adjusting the position of the movable steel guardrail on the left old road, and moving the movable steel guardrail to a center parting line of the left road.

4. The construction method according to claim 1,

and a median strip is arranged between the left road and the right road, and is provided with corresponding median strip openings when the first guide modification, the second guide modification and the third guide modification are carried out.

5. The construction method according to claim 4,

and when the third guide is changed, the sealing and reinforcing of the opening of the median strip are further carried out.

6. The construction method according to claim 1,

and adopting a guide device to form a guide angle and a guide channel when the first guide modification, the second guide modification and the third guide modification are carried out.

7. The construction method according to claim 6,

and locking parts and connecting parts are arranged at two ends of the guide device and are used for connecting the guide device and steering the guide angle.

8. The construction method according to claim 1,

the movable steel guardrail is formed by sequentially connecting a plurality of movable units and a plurality of fixed units; wherein the content of the first and second substances,

the movable unit comprises a guide unit and a support unit; the bottom of the supporting unit is provided with a sliding part which slides on the road surface; the guide unit is fixedly arranged on the support unit and used for guiding and guiding the vehicle;

the fixing unit is provided with a mounting hole for fixing the guide unit; the bottom of the fixing unit is provided with a fixing part for being fixedly installed on a road surface.

9. The construction method according to claim 1,

the anchoring-free guardrail comprises a guardrail unit and a base unit; wherein the content of the first and second substances,

mounting holes are formed in the two ends of the guardrail unit and used for being mounted on the base unit;

and fixing holes are formed in two sides of the base unit and are fixed with the mounting holes through bolts.

10. The construction method according to claim 1,

and under the condition of keeping the right road open, dismantling the anchoring-free guardrail.

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