CN110904756B

CN110904756B - Construction method of three-layer bridge

Info

Publication number: CN110904756B
Application number: CN201911290868.9A
Authority: CN
Inventors: 崔欣; 付秀松; 刘亚飞; 叶青; 高清波; 罗坤鹏; 彭奇琛
Original assignee: North China University of Water Resources and Electric Power
Current assignee: North China University of Water Resources and Electric Power
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-08-03
Anticipated expiration: 2039-12-13
Also published as: CN110904756A

Abstract

The invention provides a construction method of a three-layer bridge, which comprises a bridge pier, wherein the upper end of the bridge pier is fixedly connected with a bridge abutment, the upper end of the bridge abutment is fixedly connected with a prefabricated slab layer, the upper end of the prefabricated slab layer is fixedly connected with a cast-in-place layer, two sides of the upper end of the cast-in-place layer are fixedly connected with supporting steel structures, the upper end of each supporting steel structure is fixedly connected with a vehicle pedestrian layer, a bridge deck is arranged above the vehicle pedestrian layer, the upper end of the bridge pier is fixedly connected with a Y-shaped support and penetrates through the prefabricated slab layer and the cast-in-place layer, the middle of the Y-shaped support is fixedly connected with the vehicle pedestrian layer, and one ends of the prefabricated slab layer, the cast-in-place layer, the vehicle pedestrian layer and the bridge deck are fixedly connected with a slope. This application three-layer bridge structures is exquisite, and the construction is simple, both increases the circulation, does not have the width that increases the bridge again.

Description

Construction method of three-layer bridge

Technical Field

The invention relates to the technical field of bridge engineering, in particular to a three-layer bridge and a construction method thereof.

Background

The bridge is generally a structure which is erected on rivers, lakes and seas and allows vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, bridges are also extended to be constructed to span mountain stream, unfavorable geology or meet other traffic needs, so that the buildings are convenient to pass. The bridge generally comprises an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge span structure and is a main structure for spanning obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.

At present, prefabricated structural parts are mostly adopted for building in bridge engineering, but the overall quality of the bridge is different, particularly at the joint of the prefabricated parts. Meanwhile, in general, the width of a bridge is increased if the flow rate of the bridge is increased, but the space in the vertical direction of the bridge cannot be fully utilized. And the material consumption of engineering materials is large, and the cost is high.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a construction method of a three-layer bridge, which solves the problems of the overall performance difference of the bridge and the low utilization of the vertical space of the bridge after a prefabricated member is used.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a three-layer bridge comprises bridge piers, wherein the upper ends of the bridge piers 1 are fixedly connected with bridge abutments, the upper end of the abutment is fixedly connected with a prefabricated slab layer, the upper end of the prefabricated slab layer is fixedly connected with a cast-in-situ layer, the two sides of the cast-in-situ layer are fixedly provided with a supporting steel structure, the upper end of the W-shaped supporting steel structure is fixedly supported on the bottom surface of the pedestrian layer, a bridge deck layer is arranged above the vehicle pedestrian layer, the vehicle pedestrian layer and the bridge deck layer are fixedly connected through a support pillar, one end of a Y-shaped support is fixedly arranged on a pier, the other end of the Y-shaped support penetrates through the prefabricated plate layer and the cast-in-place layer, the middle part that Y shape supported and vehicle pedestrian layer fixed connection, the top of Y shape support and the bottom fixed connection of bridge floor layer, the one end of prefabricated plate layer and cast-in-place layer, vehicle pedestrian layer and bridge floor layer all with domatic fixed connection, domatic side is provided with first import and export and the second is imported and exported.

Preferably, a track is laid in the middle of the cast-in-place layer, reinforcing steel bars are arranged in the cast-in-place layer, more reinforcing steel bars are arranged at the supporting steel structure, and positioning fixing protrusions of the supporting steel structure are formed at the same time.

Preferably, the vehicle and pedestrian layer comprises a sidewalk and a traffic lane, and the sidewalk is fixedly connected to both sides of the traffic lane.

Preferably, the outer side of the upper end of the sidewalk is fixedly connected with a first guardrail, and the distance from the sidewalk to the bottom of the bridge deck layer is 1.9-2.2M.

Preferably, both sides of the upper end of the traffic lane are fixedly connected with second guardrails, the second guardrails separate the first inlet and the second inlet at one end of the slope, and the distance from the traffic lane to the bottom of the bridge deck is 1.7-1.9M.

Preferably, the upper end of the travelling lane is in the outside of the second guardrail and the middle of the travelling lane is fixedly connected with a support column, and the upper section of the support column is fixedly connected with the lower end of the bridge deck layer.

Preferably, both sides of the upper end of the bridge deck layer are fixedly connected with third guardrails.

Preferably, the construction method of the three-layer bridge comprises the following construction steps:

sp 1: construction procedure of bridge pier

a. If the watershed of the constructed bridge pier is in a dry season, a dam can be constructed in the construction range of the bridge pier to block water, and deep excavation and pouring construction of the bridge pier foundation is carried out; if the watershed is not in the dry season, detecting the layering condition and the water flow speed of the riverbed by using related instruments, determining the number and the depth of the driven supporting steel pipes, welding the supporting steel pipes with steel plates by using an underwater welding technology to form a closed space, draining water in the space, and pouring a bridge foundation;

b. welding a reinforcement cage on the bridge foundation, surrounding the reinforcement cage by using a building template, pouring, and reserving a reinforcement at the upper end of the bridge pier;

c. after the pier is solidified, fixing a building template at the upper end of the pier, wherein the shape of the building template is consistent with that of the abutment, placing reinforcing steel bars in the building template, welding the lower ends of the reinforcing steel bars with the reinforcing steel bars reserved at the upper end of the pier, pouring and reserving the reinforcing steel bars at the upper part of the abutment;

sp 2: construction steps of prefabricated slab layer and cast-in-place layer

a. Hoisting the prefabricated slab layer on the abutment by using hoisting equipment by taking the abutment as a fulcrum, welding and fixing exposed reinforcing steel bars at two ends of the prefabricated slab layer and reserved reinforcing steel bars at the upper end of the abutment, and binding and constructing a reinforcing steel cage required by the Y-shaped support upwards;

b. arranging a building template required by a cast-in-place layer and a building template at the lower end of the Y-shaped support at the upper end of the prefabricated slab layer, reserving connecting pieces of support steel structures at two sides of the cast-in-place layer, and pouring;

c. after the cast-in-place layer is condensed, fixedly connecting supporting steel structures on two sides of the cast-in-place layer;

sp 3: construction steps of vehicle and pedestrian layer

a. Taking a cast-in-place layer as a construction platform, building a construction template of a vehicle pedestrian layer on the cast-in-place layer, building a reinforcement cage at the upper section of a Y-shaped support and installing a construction template, constructing and arranging reinforcements in the template, embedding a support steel structure into sidewalks at two sides of the vehicle pedestrian layer, and then performing pouring operation;

b. after the pedestrian layer of the vehicle is condensed, constructing support columns at the two sides and the middle part of the traffic lane;

sp 4: construction steps of bridge deck

a. And (3) taking the sidewalk and the traffic lane as construction platforms, building a building template for the bridge deck layer, arranging reinforcing steel bars, embedding the Y-shaped support and the support column into the bridge deck layer, and pouring.

Preferably, in step Sp4, the method further comprises:

b. after the bridge deck layer is condensed, asphalt concrete is paved at the upper end of the bridge deck layer, and meanwhile, third guardrails are fixedly installed at the two ends of the bridge deck layer respectively.

Preferably, in step Sp3, the method further comprises:

c. after the pedestrian layer of the vehicle is condensed, a first guardrail and a second guardrail are respectively arranged on two sides of the sidewalk and the traffic lane.

(III) advantageous effects

The invention provides a construction method of a three-layer bridge. The method has the following beneficial effects:

1. the vehicle pedestrian layer divide into pavement and traffic lane, and the position traffic lane of its pavement is low, not only reduces the use amount that supports the steel construction, still is favorable to the pedestrian to walk in comparatively broad space to and the high enough two-wheeled vehicle in traffic lane is current.

2. Be provided with the three-layer in this bridge, not only satisfy the crowd of different bridge demands, still separate the crowd, ensured crowd's safety, the space of make full use of vertical direction is provided with to the design of three-layer.

Drawings

FIG. 1 is a schematic side view of a bridgehead according to the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Wherein, 1, bridge piers; 2. an abutment; 3. prefabricating a slab layer; 4. a cast-in-place layer; 5. supporting the steel structure; 6. A vehicle pedestrian layer; 7. a first guardrail; 8. a slope surface; 9. a first inlet/outlet; 10. a second guard rail; 11. a second inlet/outlet; 12. a support pillar; 13. a third guardrail; 14. a bridge deck layer; 15. a Y-shaped support; 16. A track; 17. a sidewalk; 18. a roadway; 19. and reinforcing the steel bars.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

as shown in figures 1-3, the embodiment of the invention provides a three-layer bridge, which comprises a bridge pier 1, wherein the upper end of the bridge pier 1 is fixedly connected with a bridge abutment 2, the upper end of the bridge abutment 2 is fixedly connected with a prefabricated slab layer 3, the upper end of the prefabricated slab layer 3 is fixedly connected with a cast-in-place layer 4, two sides of the cast-in-place layer 4 are fixedly provided with supporting steel structures 5, the upper ends of the W-shaped supporting steel structures 5 are fixedly supported on the bottom surface of a vehicle pedestrian layer 6, a bridge deck layer 14 is arranged above the vehicle pedestrian layer 6, the vehicle pedestrian layer 6 and the bridge deck layer 14 are fixedly connected through supporting columns 12, one end of a Y-shaped support 15 is fixedly arranged on the bridge pier 1, the other end of the Y-shaped support penetrates through the prefabricated slab layer 3 and the cast-in-place layer 4, the middle part of the Y-shaped support 15 is fixedly connected with the vehicle pedestrian layer 6, the top end of the Y-shaped support 15 is fixedly connected with the bottom of the bridge deck layer 14, the prefabricated slab layer 3 and the cast-in-place layer 4, One end of the vehicle pedestrian layer 6 and one end of the bridge surface layer 14 are fixedly connected with the slope surface 8, and the side surface of the slope surface 8 is provided with a first inlet and outlet 9 and a second inlet and outlet 11.

A track 16 is laid in the middle of the cast-in-place layer 4, reinforcing steel bars 19 are arranged in the cast-in-place layer 4, more reinforcing steel bars 19 are arranged at the positions where the supporting steel structures 5 are arranged, positioning fixing protrusions of the supporting steel structures 5 are formed, the vehicle pedestrian layer 6 comprises sidewalks 17 and traffic lanes 18, the sidewalks 17 are arranged on two sides of the traffic lanes 18, the sidewalks 17 are lower than the traffic lanes 18, a first guardrail 7 is fixedly connected to the outer side of the upper end of each sidewalk 17, the distance from each sidewalk 17 to the bottom of the bridge deck layer 14 is 1.9-2.2M, second guardrails 10 are fixedly connected to two sides of the upper end of each traffic lane 18, each second guardrail 10 separates a first inlet and a second outlet 9 from each other at one end of the slope 8, the distance from each traffic lane 18 to the bottom of the bridge deck layer 14 is 1.7-1.9M, supporting columns 12 are fixedly connected to the outer sides of the second guardrails 10 at two ends of each traffic lane 18 and the middle of the traffic lane 18, the upper end of the support column 12 is fixedly connected with the lower bottom surface of the bridge surface layer 14, and the two sides of the upper top surface of the bridge surface layer 14 are fixedly connected with third guardrails 13.

Example two:

a construction method of a three-layer bridge comprises the following construction steps:

sp 1: construction procedure of pier 1

a. If the watershed of the pier 1 is in a dry season, a dam can be built in the construction range of the pier 1 to block water, and deep excavation and pouring construction of the pier 1 foundation is carried out; if the water quantity of the watershed is not in the dry season, related instruments are used for detecting the layering condition and the water flow speed of the riverbed, the number and the depth of the driven supporting steel pipes are determined, the underwater welding technology is used for welding the supporting steel pipes with steel plates to form a closed space, water in the space is discharged, and the bridge base is poured.

b. And welding a reinforcement cage on the bridge foundation, surrounding by using a building template, pouring, and reserving a reinforcement at the upper end of the pier 1.

c. After the pier 1 is initially set, a building template is fixed at the upper end of the pier 1, the shape of the building template is consistent with that of the abutment 2, reinforcing steel bars are placed in the building template, the lower ends of the reinforcing steel bars are welded with the reinforcing steel bars reserved at the upper end of the pier 1, and then pouring is carried out, and the reinforcing steel bars at the upper end of the abutment 2 are reserved.

Sp 2: construction steps of prefabricated slab layer 3 and cast-in-place layer 4

a. Use abutment 2 as the fulcrum, utilize hoisting equipment to hoist prefabricated sheet layer 3 on abutment 2, the exposed reinforcing bar in both ends of prefabricated sheet layer 3 and the reinforcing bar welded fastening of abutment 2 upper end to upwards ligature construction Y shape supports the required steel reinforcement cage of 15.

b. And a building template required by a cast-in-place layer 4 and a building template at the lower end of the Y-shaped support 15 are arranged at the upper end of the prefabricated slab layer 3, and connecting pieces for supporting the steel structure 5 at two sides of the cast-in-place layer 4 are reserved for pouring.

c. After the cast-in-place layer 4 is solidified, the two sides of the cast-in-place layer 4 are fixedly connected with the supporting steel structures 5.

Sp 3: construction step of the pedestrian layer 6 of vehicles

a. Use cast-in-place layer 4 as construction platform, build the construction template for vehicle pedestrian layer 6 on cast-in-place layer 4, build the steel reinforcement cage and the installation building templates of Y shape support 15 upper segment simultaneously to arrange the reinforcing bar in the template, and support steel construction 5 and bury in the pavement 17 on vehicle pedestrian layer 6 both sides, then pour.

b. After the vehicle and pedestrian layer 6 is fixed, the first guardrail 7 and the second guardrail 10 are respectively arranged on two sides of the sidewalk 17 and the traffic lane 18.

c. The support columns 12 are constructed on both sides and in the middle of the roadway 18.

Sp 4: construction step of bridge deck 14

a. Building templates and arranging steel bars for the bridge surface layer 14 are built by taking the sidewalks 17 and the traffic lanes 18 as construction platforms, the Y-shaped supports 15 and the support columns 12 are buried in the bridge surface layer 14, and pouring is started.

b. After the bridge surface layer 14 is solidified, asphalt is paved on the upper end of the bridge surface layer 14, and meanwhile, third guardrails 13 are fixedly installed at two ends of the bridge surface layer 14 respectively.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A construction method of a three-layer bridge comprises a bridge pier (1), and is characterized in that: the upper end of the pier (1) is fixedly connected with a bridge abutment (2), the upper end of the bridge abutment (2) is fixedly connected with a prefabricated slab layer (3), the upper end of the prefabricated slab layer (3) is fixedly connected with a cast-in-place layer (4), two sides of the cast-in-place layer (4) are fixedly provided with supporting steel structures (5), the upper end of the W-shaped supporting steel structure (5) is fixedly supported on the bottom surface of a vehicle pedestrian layer (6), a bridge deck layer (14) is arranged above the vehicle pedestrian layer (6), the vehicle pedestrian layer (6) and the bridge deck layer (14) are fixedly connected through a supporting column (12), one end of a Y-shaped support (15) is fixedly arranged on the pier (1), the other end of the Y-shaped support penetrates through the prefabricated slab layer (3) and the cast-in-place layer (4), the middle part of the Y-shaped support (15) is fixedly connected with the vehicle pedestrian layer (6), and the top end of the Y-shaped support (15) is fixedly connected with the bottom of the bridge deck layer (14), one end of each of the prefabricated slab layer (3), the cast-in-place layer (4), the pedestrian-vehicle layer (6) and the bridge deck layer (14) is fixedly connected with the slope surface (8), and a first inlet and a second inlet (9) and a second inlet and a second outlet (11) are formed in the side surface of the slope surface (8);

the construction method of the three-layer bridge comprises the following construction steps:

sp 1: construction procedure of bridge pier (1)

a. If the watershed of the constructed pier (1) is in a dry season, a dam can be constructed in the construction range of the pier (1) to block water, and deep excavation and pouring construction of the foundation of the pier (1) is carried out; if the watershed is not in the dry season, detecting the layering condition and the water flow speed of the riverbed by using related instruments, determining the number and the depth of the driven supporting steel pipes, welding the supporting steel pipes with steel plates by using an underwater welding technology to form a closed space, draining water in the space, and pouring a bridge foundation;

b. welding a reinforcement cage on the bridge foundation, surrounding the reinforcement cage by using a building template, and pouring, wherein a reinforcement is reserved at the upper end of the bridge pier (1);

c. after the pier (1) is solidified, fixing a building template at the upper end of the pier (1), wherein the shape of the building template is consistent with that of the abutment (2), placing reinforcing steel bars in the building template, welding the lower ends of the reinforcing steel bars with the reinforcing steel bars reserved at the upper end of the pier (1), pouring and reserving the reinforcing steel bars at the upper part of the abutment (2);

sp 2: construction steps of prefabricated slab layer (3) and cast-in-place layer (4)

a. The prefabricated slab layer (3) is hoisted on the bridge abutment (2) by utilizing hoisting equipment by taking the bridge abutment (2) as a fulcrum

Welding and fixing exposed reinforcing steel bars at two ends of the prefabricated slab layer (3) and reserved reinforcing steel bars at the upper end of the abutment (2), and binding a reinforcing steel cage required by the construction of the Y-shaped support (15) upwards;

b. arranging a building template required by a cast-in-place layer (4) and building templates at the lower ends of Y-shaped supports (15) at the upper end of the prefabricated slab layer (3), reserving connecting pieces of support steel structures (5) at two sides of the cast-in-place layer (4) at the same time, and pouring;

c. after the cast-in-situ layer (4) is condensed, fixedly connecting supporting steel structures (5) on two sides of the cast-in-situ layer (4);

sp 3: construction step of vehicle pedestrian layer (6)

a. The construction method comprises the following steps of taking a cast-in-place layer (4) as a construction platform, building a construction template of a vehicle pedestrian layer (6) on the cast-in-place layer (4), building a reinforcement cage on the upper section of a Y-shaped support (15) and installing the construction template, constructing and arranging reinforcements in the template, embedding a support steel structure (5) into sidewalks (17) on two sides of the vehicle pedestrian layer (6), and then performing pouring operation;

b. after the vehicle pedestrian layer (6) is condensed, constructing support columns (12) at two sides and the middle part of the traffic lane (18);

sp 4: construction step of bridge deck (14)

a. A sidewalk (17) and a traffic lane (18) are used as construction platforms, a building template is built for a bridge surface layer (14), steel bars are arranged, a Y-shaped support (15) and a support column (12) are buried in the bridge surface layer (14), and pouring is started.

2. The construction method of the three-layer bridge according to claim 1, wherein: a track (16) is laid in the middle of the cast-in-place layer (4), reinforcing steel bars (19) are arranged in the cast-in-place layer (4), and more reinforcing steel bars (19) are arranged at the supporting steel structure (5) and are simultaneously formed with positioning fixing protrusions of the supporting steel structure (5).

3. The method for constructing a three-layer bridge according to claim 1 or 2, wherein: the vehicle pedestrian layer (6) comprises a sidewalk (17) and a traffic lane (18), and the sidewalk (17) is fixedly connected to the two sides of the traffic lane (18).

4. The construction method of the three-layer bridge according to claim 3, wherein: the outer side of the upper end of the sidewalk (17) is fixedly connected with a first guardrail (7), and the distance from the sidewalk (17) to the bottom of the bridge deck layer (14) is 1.9-2.2M.

5. A method of constructing a triple layer bridge according to claim 1 or 3, wherein: the two sides of the upper end of the traffic lane (18) are fixedly connected with second guardrails (10), the first inlet and outlet (9) and the second inlet and outlet (11) are separated by the second guardrails (10) at one end of the slope (8), and the distance from the traffic lane (18) to the bottom of the bridge deck (14) is 1.7-1.9M.

6. A method of constructing a three-layer bridge according to claim 1, 3 or 5, wherein: the upper end of the traffic lane (18) is in the outer side of the second guardrail (10) and the middle of the traffic lane (18) is fixedly connected with a support column (12), and the upper section of the support column (12) is fixedly connected with the lower end of the bridge deck (14).

7. The construction method of the three-layer bridge according to claim 1, wherein: and both sides of the upper end of the bridge surface layer (14) are fixedly connected with third guardrails (13).

8. The method for constructing a three-layer bridge according to claim 1, wherein in step Sp4, the method further comprises:

b. after the bridge deck layer (14) is condensed, asphalt concrete is paved at the upper end of the bridge deck layer (14), and meanwhile, third guardrails (13) are fixedly installed at the two ends of the bridge deck layer (14) respectively.

9. The method for constructing a three-layer bridge according to claim 1, wherein in step Sp3, the method further comprises:

c. after the vehicle pedestrian layer (6) is condensed, a first guardrail (7) and a second guardrail (10) are respectively arranged on two sides of the sidewalk (17) and the traffic lane (18).