CN111622103A - Cross-channel highway bridge with load and speed limiting function and pouring method of width limiting pier - Google Patents

Abstract

The invention discloses a cross-channel highway bridge with load-limiting and speed-limiting functions, which belongs to the technical field of load-limiting and speed-limiting of cross-channel highway bridges and comprises a bridge body, wherein a bridge floor is arranged on the bridge body, and a sidewalk I, a trolley one-way road I, a cart one-way road, a trolley one-way road II and a sidewalk II are sequentially arranged on the bridge floor from left to right; and deceleration strips are respectively arranged at two ends of the bridge floor. The invention redesigns the bridge deck lane, not only adds the deceleration strip, but also marks out the driving lane for cars individually to ensure the safety of the cars, creatively adds the design concept of 'big car one-way lane, alternate traffic' to reduce the load of the bridge, avoid the excessive and too fast vehicles to pass on the bridge together, prolong the service life of the bridge and avoid influencing pedestrians.

Description

Cross-channel highway bridge with load and speed limiting function and pouring method of width limiting pier

Technical Field

The invention relates to the technical field of load and speed limitation of a cross-channel highway bridge, in particular to a cross-channel highway bridge with a load and speed limiting function and a pouring method of a width limiting pier.

Background

The cross-channel highway bridge generally has large carrying capacity of passing vehicles and higher passing frequency of super-tonnage vehicles, the arrangement of the double lanes not only influences the safe running of other cars which want to pass through the bridge, but also influences the bearing capacity and durability of the bridge, and moreover, the vibration generated by too many too fast vehicles running on the bridge is larger, and the comfort level of pedestrians around the bridge is seriously influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a cross-channel highway bridge with load limiting and speed limiting functions; this cross channel highway bridge with limit for load speed limit function is designed for solving above-mentioned problem specially, and this highway bridge redesign bridge floor lane has not only add the deceleration strip, still marks out the lane of traveling alone for the car, guarantees its security, and the creative design concept of having added "big car one-way road, it is current in turn" has reduced the burden for the bridge unloading, avoids too much too fast vehicle to pass on the bridge together, prolongs the life of bridge, avoids influencing the pedestrian.

In order to solve the technical problems, the channel-crossing highway bridge with the load-limiting and speed-limiting functions comprises a bridge body, wherein a bridge floor is arranged on the bridge body, and a sidewalk I, a trolley one-way road I, a cart one-way road, a trolley one-way road II and a sidewalk II are sequentially arranged on the bridge floor from left to right; and deceleration strips are respectively arranged at two ends of the bridge floor.

The speed bump can well reduce the driving speed; the driving lanes are independently marked for the cars, so that the safety of the cars is ensured; the creative design concept of 'big vehicle one-way road and alternate traffic' enables big vehicles to be only arranged on the bridge in a single row, so that load shedding and load shedding are realized for the bridge, traffic lights are arranged near the bridge heads at two ends during use, the orderly alternate traffic of the big vehicles at two ends of the bridge is assisted, excessive and too fast vehicles are prevented from passing on the bridge together, and the service life of the bridge is prolonged.

In the further improvement of the invention, a guardrail I is arranged at the junction of the sidewalk I and the trolley one-way road I; and a guardrail II is arranged at the junction of the sidewalk II and the trolley one-way road II.

Through the design, the scheme can be more favorable for the safety of pedestrians, avoids the mutual channeling of the trolley and the pedestrians to drive, and causes safety accidents.

In the further improvement of the invention, a dividing pier group I is arranged at the junction of the trolley one-way road I and the cart one-way road I, two ends of the dividing pier group I are respectively provided with a width limiting pier I, and the width limiting piers I are positioned at the end head of the bridge floor.

Through the setting, this scheme can more do benefit to the safety of traveling of dolly, avoids dolly and cart to scurry the way each other and traveles, causes the incident, and the setting of limit for width mound I is also that the vehicle for better avoiding the super width is current, further avoids the bridge to overload.

In the further improvement of the invention, a dividing pier group II is arranged at the junction of the large-vehicle single-road and the small-vehicle single-road II, two ends of the dividing pier group II are respectively provided with a width limiting pier II, and the width limiting piers II are positioned at the end head of the bridge floor.

Through the design, the scheme can be more favorable for the driving safety of the trolley, the trolley and the cart are prevented from running in a channel mutually, safety accidents are caused, the setting of the width limiting pier II is also used for better avoiding the vehicle passing through with the super-width, and the bridge overload is further avoided.

In the further improvement of the invention, the isolation pier group I and the isolation pier group II both adopt a concrete prefabricated isolation pier and steel pipe combined structure.

Through the design, the lane isolation device can better isolate lanes.

In the further improvement of the invention, the isolation pier is fixed on the bridge floor by using the embedded bars or the expansion bolts.

Through the design, the scheme can be more favorable for firm connection of the isolation pier and the bridge floor.

In the further improvement of the invention, the width limiting pier I and the width limiting pier II are both square concrete piers, 5 multiplied by 5cm equilateral angle steel is embedded at four corners of each square concrete pier for edge covering, and the square concrete piers are formed by pouring C30 plain concrete.

Through the design, the scheme can be more favorable for prolonging the service life and the use stability of the width limiting pier (the width limiting pier I and the width limiting pier II).

In a further improvement of the invention, the square concrete pier is provided with a restriction signboard.

Through the design, the running vehicle can know the lane from which the vehicle runs more clearly.

In the further improvement of the invention, the deceleration strip is made of cast iron, and the distance between the deceleration strip and an end expansion joint of the bridge floor is 5-15 m.

Through the design, the service life of the deceleration strip can be prolonged more conveniently by the scheme.

In a further improvement of the invention, a height limiting mechanism is arranged on the bridge deck.

The height of passing vehicles can be limited by the arrangement of the height limiting mechanism, and the overload work of the bridge is better avoided.

In a further improvement of the invention, the height limiting mechanism comprises a height limiting frame, a driving motor is arranged at the top of the height limiting frame, the driving motor is connected with a double-output-shaft speed reducer, two output ends of the double-output-shaft speed reducer are respectively connected with a screw rod lifter, an extending end of the screw rod lifter is connected with a height limiting cross rod, and the height limiting cross rod is connected with the height limiting frame in a sliding manner.

Through above-mentioned design, this scheme can be more convenient for according to the height of current requirement adjustment limit for height mechanism, during the use, power transmission direction: a driving motor, a double output shaft speed reducer, a lead screw lifter and a height limiting cross bar.

In a further improvement of the invention, the height limiting frame is in an inverted U shape, and comprises a rod I, the rod I is connected with a rod II, and the rod II is connected with a rod III; the rod II and the rod III are both made of channel steel; and the outer wall of the rod II and the outer wall of the rod III are respectively provided with a corresponding dial gauge.

Through the design, the height of the height limiting mechanism can be adjusted conveniently by the scheme.

In a further improvement of the invention, the inner walls of the rod II and the rod III are respectively provided with a slideway, the slideways are connected with sliding blocks in a sliding manner, and two ends of the height-limiting cross rod are respectively provided with the sliding blocks.

Through the design, the height limiting cross rod can ascend or descend more smoothly.

A pouring method of a width-limiting pier adopts commercial mixed cast-in-place, and specifically comprises the following steps:

(1) erecting a mould after in-situ lofting, wherein the mould is erected by adopting a square wood bamboo plywood, and reinforcing a steel pipe;

(2) pouring concrete into the mould, and vibrating by using a vibrator;

(3) standing for 1 hour, initially setting the concrete, and covering, preserving heat and maintaining;

(4) the mould is dismantled after 2 days;

(5) standing for more than 48 hours, and evaporating the water on the surface of the concrete;

(6) and (3) coating the surface, coating red and white alternate oblique strip warning paint on the surface, specifically, priming the surface with white paint, and brushing the surface with red paint elastic lines.

Through the design, the width limiting pier can be manufactured conveniently by the scheme.

Compared with the prior art, the invention has the following beneficial effects:

the invention redesigns the bridge deck lane, not only adds the deceleration strip, but also marks out the driving lane for cars individually to ensure the safety of the cars, creatively adds the design concept of 'big car one-way lane, alternate traffic' to reduce the load of the bridge, avoid the excessive and too fast vehicles to pass on the bridge together, prolong the service life of the bridge and avoid influencing pedestrians.

Drawings

To more clearly illustrate the background art or the technical solutions of the present invention, the following brief description of the drawings incorporated in the prior art or the detailed description of the present invention; it should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is to be given the full breadth of the present disclosure, and are not intended to limit the scope of the present disclosure.

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

Fig. 2 is a schematic view of the pouring process of the width-limited pier of the invention.

Shown in the figure: 1-bridge deck; 2-guardrail I; 3-guardrail II; 4-hard shoulder group I; 5-width limiting pier I; 6-hard shoulder group II; 7-width limiting pier II; 8-isolation piers; 9-steel pipe.

Detailed Description

In order to make the technical solution of the present invention better understood, the following description is provided with reference to the accompanying drawings, the technical solutions in the embodiments of the present invention are clearly and completely described, and obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, which are consistent with the present invention, all other embodiments that may be devised by those skilled in the art without departing from the scope and spirit of the invention, meanwhile, the terms such as "upper", "lower", "front", "rear" and "middle" used in the present specification are for clarity of description only and are not intended to limit the scope of the present invention, changes and modifications in the relative relationship to each other without substantial technical change should also be considered as the scope of the present invention.

As shown in fig. 1, the channel-crossing highway bridge with the load-limiting and speed-limiting functions comprises a bridge body, wherein a bridge floor 1 is arranged on the bridge body, and a sidewalk I, a trolley one-way road I, a cart one-way road, a trolley one-way road II and a sidewalk II are sequentially arranged on the bridge floor 1 from left to right; deceleration strips are respectively arranged at two ends of the bridge floor 1; the deceleration strip is made of cast iron, and the distance between the deceleration strip and an end expansion joint of the bridge floor is 5-15 m.

A guardrail I2 is arranged at the junction of the sidewalk I and the trolley one-way road I; and a guardrail II 3 is arranged at the junction of the sidewalk II and the trolley one-way road II.

The juncture of the trolley one-way road I and the cart one-way road is provided with a dividing pier group I4, two ends of the dividing pier group I4 are respectively provided with a width limiting pier I5, and the width limiting pier I5 is positioned at the end of the bridge deck 1.

And a partition pier group II 6 is arranged at the junction of the cart one-way road and the trolley one-way road II, two ends of the partition pier group II 6 are respectively provided with a width limiting pier II 7, and the width limiting piers II 7 are positioned at the end of the bridge deck 1.

The isolation pier group I4 and the isolation pier group II 5 both adopt a concrete prefabricated isolation pier 8 and steel pipe 9 combined structure; the hard shoulder 8 is fixed on the bridge floor 1 by adopting embedded bars or expansion bolts.

The width limiting piers I5 and the width limiting piers II 7 are both square concrete piers, 5 multiplied by 5cm equilateral angle steel wrapping edges are pre-embedded at four corners of each square concrete pier, and the square concrete piers are formed by pouring C30 plain concrete; and a traffic control signboard is arranged on the square concrete pier.

As shown in fig. 2, a pouring method of a width-limiting pier adopts commercial mixed cast-in-place, and specifically comprises the following steps:

(1) erecting a mould after in-situ lofting, wherein the mould is erected by adopting a square wood bamboo plywood, and reinforcing a steel pipe;

(2) pouring concrete into the mould, and vibrating by using a vibrator;

(3) standing for 1 hour, initially setting the concrete, and covering, preserving heat and maintaining;

(4) the mould is dismantled after 2 days;

(5) standing for more than 48 hours, and evaporating the water on the surface of the concrete;

(6) and (3) coating the surface, coating red and white alternate oblique strip warning paint on the surface, specifically, priming the surface with white paint, and brushing the surface with red paint elastic lines.

This scheme sets up through limit for tonnage, speed limit and makes current vehicle reduce the through speed, carries out big small vehicle lane separation greatly reduced vehicle accident rate, extension bridge's life simultaneously, simultaneously because three lanes independent operation, can use the single lane current when bridge floor health clearance or daily maintenance, does not influence the normal use of bridge.

The common deceleration strip is usually made of rubber and cast iron according to different materials, the traffic characteristics of the bridge are considered, and the cast iron deceleration strip is adopted according to the scheme according to the consideration of heavy traffic; in order to reduce the vibration of the heavy vehicle on the bridge, deceleration strips are arranged at two ends of the east and west bridge and are 5-15m away from an expansion joint of the bridge ends.

The common width limiting piers comprise cylindrical piers and square piers, and are divided into steel piers, concrete piers and steel pipe concrete piers according to materials; considering that the bridge is a large vehicle, the scheme adopts a square concrete pier, the length, width and height are 2 multiplied by 1 multiplied by 1.5m, C30 plain concrete is adopted, and 5 multiplied by 5cm equilateral angle steel edge-covering is pre-embedded at four corners of the width limiting pier; the bridge heads on two sides are respectively provided with 2 width limiting piers, the width limiting piers are arranged from the expansion joints of the bridge heads outwards, the transverse distance is 5m, the width limiting piers are symmetrically arranged along the axis of the bridge, and the transverse clear distance between the piers is 3.5 m; after the width limiting piers are installed, concrete prefabricated isolation piers with the width of 35cm are additionally installed on lanes on the south and north sides, and the width of two lanes on the outer sides is limited to be 2.5 m.

The width limiting pier is poured in a commercial mixing site, and a template is erected after in-situ lofting; the template is supported by square wood bamboo plywood and reinforced by steel pipes. Considering weather factors, erecting the template by the four width limiting piers at one time, and constructing simultaneously; pouring left and right at 9 am with higher average temperature, and covering, insulating and maintaining after pouring, vibrating and initial setting; removing the mold after 2 days, and performing surface coating after the water on the surface of the concrete is evaporated; red and white alternate oblique strip warning paint is coated on the surface of the width limiting pier. And (4) priming white paint, and brushing a red paint bullet line.

The number of concrete prefabricated type isolation piers required by lane width limitation is 16, and the isolation piers and the bridge floor are fixed by adopting embedded bars or expansion bolts.

The restriction nameplate is arranged on the outer side of the right curb belt of the bridgehead, circular signs of round tubes and single columns are adopted, the sign diameter is not less than 80cm, the column diameter is 10cm, the height is not less than 3m, and the distance from the bridgehead is 10-15 m. The specific form and the marking content are negotiated and determined with a management department, and the use authority of the installation position of the warning board needs to be determined.

The bridge deck traffic restriction isolation adopts a 3.2m +4.65m +3.2m three-lane scheme, the middle lane is a heavy lane and is limited to be crossed for single vehicles, and the lanes on the two sides are used for one-way driving of the trolleys and the non-motor vehicles.

The bridge deck lane isolation belt adopts a combination form of precast concrete piers and steel pipes, the center distance between the isolation piers is 3m, and the steel pipes are connected in a through length mode; the prefabricated isolation pier has the length of 50cm, the height of 50cm, the top width of 12cm and the bottom width of 35cm, the weight of a single isolation pier is about 0.12t, and a steel pipe with the diameter of 32mm is arranged in the middle of the isolation pier for fixing.

Considering the prefabricated hard shoulder with the bridgehead matching the lane limit, the full bridge (75 meters long) needs about 56 blocks in total, and the total weight is about 7 t.

The prefabricated isolation pier is purchased, finished products are transported to the field, and then manual lofting and line snapping are carried out; after the two isolation piers are installed in place, steel pipes are penetrated and fixed to form an isolation belt; and after the steel pipe is installed, coating yellow-black space paint on the surface of the steel pipe, and matching the steel pipe with the isolation pier.

Before the concrete isolation pier scheme is determined, a counseling design unit is suggested to manage, and the weight of the isolation piers increased by the bridge deck and the influence of a canalized traffic control form on the use safety of the bridge are determined.

In the scheme, due to the arrangement of the deceleration strip, the passing vehicle is decelerated and passed, so that the probability of accidents is reduced; by adopting lane separation measures, the big and small vehicles respectively go on their own lanes and pass in one way, so that the accident rate of the vehicles is greatly reduced, and the service life of the bridge is prolonged; due to the fact that the three lanes run independently, one to two lanes can be temporarily closed during sanitary cleaning or daily maintenance, and single lane passing is used without influencing normal traffic passing.

According to the current implementation effect, the passing vehicle speed is obviously reduced, the sanitation of the surrounding environment for cleaning the temporarily closed lane is greatly improved, the service life of the bridge is prolonged, and the accident rate of the vehicle passing through the bridge is reduced; the investment cost is not high, for example, a bridge 75m long and 16m wide is taken as an example, the total cost of reconstruction is about twenty thousand yuan.

Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a stride channel highway bridge with limit load speed limit function, includes the pontic, be provided with the bridge floor on the pontic, its characterized in that: a sidewalk I, a trolley one-way road I, a cart one-way road, a trolley one-way road II and a sidewalk II are sequentially arranged on the bridge floor from left to right; and deceleration strips are respectively arranged at two ends of the bridge floor.

2. The cross-channel highway bridge with load and speed limiting functions according to claim 1, wherein: a guardrail I is arranged at the junction of the sidewalk I and the trolley one-way road I; and a guardrail II is arranged at the junction of the sidewalk II and the trolley one-way road II.

3. The cross-channel highway bridge with load and speed limiting functions according to claim 2, wherein: dolly one-way road I and cart one-way road's juncture is provided with hard shoulder group I, and hard shoulder group I's both ends are provided with a limit for width mound I respectively, and limit for width mound I is located the bridge floor end.

4. The cross-channel highway bridge with load and speed limiting functions according to claim 3, wherein: and a dividing pier group II is arranged at the junction of the cart one-way road and the trolley one-way road II, two ends of the dividing pier group II are respectively provided with a width limiting pier II, and the width limiting piers II are positioned at the end of the bridge deck.

5. The cross-channel highway bridge with load and speed limiting functions according to claim 4, wherein: the isolation pier group I and the isolation pier group II both adopt a concrete prefabricated isolation pier and steel pipe combined structure.

6. The cross-channel highway bridge with load and speed limiting functions according to claim 5, wherein: the hard shoulder is fixed on the bridge floor by adopting embedded bars or expansion bolts.

7. The cross-channel highway bridge with load and speed limiting functions according to claim 4, wherein: the width limiting piers I and the width limiting piers II are both square concrete piers, the four corners of each square concrete pier are embedded with 5 multiplied by 5cm equilateral angle steel for edge wrapping, and the square concrete piers are formed by pouring C30 plain concrete.

8. The cross-channel highway bridge with load and speed limiting functions according to claim 7, wherein: and a traffic control signboard is arranged on the square concrete pier.

9. The cross-channel highway bridge with load and speed limiting functions according to claim 1, wherein: the deceleration strip is made of cast iron, and the distance between the deceleration strip and an end expansion joint of the bridge floor is 5-15 m.

10. A pouring method of a width-limiting pier is characterized by comprising the following steps: the method adopts commercial mixed cast-in-place, and specifically comprises the following steps:

(1) erecting a mould after in-situ lofting, wherein the mould is erected by adopting a square wood bamboo plywood, and reinforcing a steel pipe;

(2) pouring concrete into the mould, and vibrating by using a vibrator;

(3) standing for 1 hour, initially setting the concrete, and covering, preserving heat and maintaining;

(4) the mould is dismantled after 2 days;

(5) standing for more than 48 hours, and evaporating the water on the surface of the concrete;

(6) and (3) coating the surface, coating red and white alternate oblique strip warning paint on the surface, specifically, priming the surface with white paint, and brushing the surface with red paint elastic lines.

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