CN211735003U

CN211735003U - Portal pier and viaduct

Info

Publication number: CN211735003U
Application number: CN201922103200.0U
Authority: CN
Inventors: 黄光辉; 毛李伟; 覃业艳; 龙俊贤; 邹向农; 陈银伟; 李前名; 钟浩; 耿天琪; 吴帅峰; 张帆; 蔡东; 耿天麒
Original assignee: China Railway Wuhan Survey and Design and Institute Co Ltd
Current assignee: Wuhan Branch Of China Railway Bridge Survey And Design Institute Group Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-10-23
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to a pier technical field provides a portal pier, including first pier stud and the second pier stud of locating the barrier both sides respectively, still including locating actuating system on the first pier stud and can by actuating system drives the bent cap with the removal, the bent cap has and locates stiff end on the first pier stud and can by driving system drives the back and stridees across the barrier and fall in expansion end on the second pier stud. Still provide an elevated bridge, including foretell portal pier, portal pier the bent cap is put on the shelf and is equipped with the bridge. The utility model discloses a driving system comes to stride across the barrier after prefabricated bent cap directly drives to accomplish the construction of portal pier, solved among the prior art and be difficult to directly pour and the maintenance concrete in the railway top, disturb big, the unable hoist and mount of limited district and bring defects such as very big risk to railway operation safety to the railway operation.

Description

Portal pier and viaduct

Technical Field

The utility model relates to a pier technical field specifically is a portal pier and overpass.

Background

The existing newly-built railway and the existing railway are crossed and generally adopt a beam type structure. When the intersection angle of the newly-built bridge and the existing line is small, the span of the beam type structure is too large, the manufacturing cost is high, and the bridge is difficult to span, the railway can be spanned by using the portal pier and the standard span beam bridge.

However, the scheme is limited by the crossed railway, namely when the existing railway line is crossed, because the operation of the existing railway line cannot be interrupted, concrete is difficult to pour and maintain directly above the railway; secondly, when the steel bent cap is hoisted, skylight points of the railway need to be utilized, and the interference on the railway operation is large. Thirdly, when the steel bent cap is hoisted, large hoisting equipment is needed, and the ground limited area cannot be hoisted; and fourthly, in the using stage, rust prevention measures need to be taken for the steel bent cap, operation is needed to be carried out right above the railway during treatment, and great risks are brought to railway operation safety.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portal pier and overpass will make prefabricated bent cap directly drive the back and stride across the barrier through actuating system to accomplish the construction of portal pier, overcome above-mentioned technological problem.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the utility model provides a portal pier, is including locating first pier stud and the second pier stud of barrier both sides respectively, still including locating actuating system on the first pier stud and can by actuating system drives the bent cap with the removal, the bent cap has locates stiff end on the first pier stud and can by stride across after actuating system drives the barrier and fall in expansion end on the second pier stud.

Furthermore, a support is arranged at the position, where the second pier stud receives the movable end of the bent cap.

Furthermore, the movable end which falls on the second pier stud is fixed on the support through a first fixing piece, and the fixed end is fixed on the driving system through a second fixing piece.

Further, the first fixing piece and the second fixing piece are both made of concrete.

Further, the driving system comprises a rotating mechanism which can drive the bent cap to rotate by taking the fixed end of the bent cap as a rotating point and enable the movable end to fall on the second pier column.

Furthermore, the swivel mechanism comprises an upper rotating disc and a lower rotating disc which are oppositely arranged, the upper rotating disc and the lower rotating disc are connected through a spherical hinge, and the fixed end of the cover beam is fixedly arranged on the upper rotating disc; the swivel mechanism further comprises a driving piece for driving the cover beam to rotate by taking the spherical hinge as a rotating point.

Further, the driving piece comprises a steel strand wound on the lower rotary table and a continuous jack capable of tensioning the steel strand and the cover beam.

Further, the continuous jack is connected with the steel strand and the bent cap through a back cable.

The embodiment of the utility model provides another kind of technical scheme: the overhead bridge comprises the portal pier, and a bridge is erected on the bent cap of the portal pier.

Compared with the prior art, the beneficial effects of the utility model are that: the prefabricated bent cap is directly driven by the driving system to cross the barrier so as to complete construction of the portal pier, and the defects that concrete is difficult to pour and maintain directly above a railway, the interference on railway operation is large, a limited area cannot be hoisted, great risk is brought to railway operation safety and the like in the prior art are overcome.

Drawings

Fig. 1 is a schematic view of a portal pier at a first view angle according to an embodiment of the present invention before construction;

fig. 2 is a schematic diagram of a portal pier after construction at a first view angle according to an embodiment of the present invention;

fig. 3 is a schematic view of a portal pier at a second view angle according to an embodiment of the present invention before construction;

fig. 4 is a schematic diagram of a portal pier after construction at a second view angle according to an embodiment of the present invention;

fig. 5 is a schematic view of a first view angle of a driving system of a gantry pier according to an embodiment of the present invention;

fig. 6 is a schematic view of a second view angle of the driving system of a gantry pier according to an embodiment of the present invention;

fig. 7 is a schematic view of a viaduct according to an embodiment of the present invention;

in the reference symbols: 1-a first pier stud; 2-a second pier stud; 20-a support; 3-an obstacle; 4-a swivel mechanism; 40-upper turntable; 41-lower turntable; 42-spherical hinge; 43-dorsal cable; 44-traction reaction seat; 45-positioning a steel pin shaft; 46-ground base; 47-anchor points; 5-a capping beam; 50-fixed end; 51-a movable end; 52-Cap center line; 6-concrete; 7-a bridge; 8-side slope.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-6, an embodiment of the present invention provides a portal pier, including a first pier stud 1 and a second pier stud 2 respectively disposed at two sides of an obstacle 3, further including a driving system disposed on the first pier stud 1 and a cover beam 5 driven by the driving system to move, where the cover beam 5 has a fixed end 50 disposed on the first pier stud 1 and a movable end 51 capable of crossing the obstacle 3 and falling on the second pier stud 2 after being driven by the driving system. In the prior art, when the intersection angle of the newly-built bridge 7 and the existing line is small, a portal pier is adopted for solving the problem, however, the existing portal pier is limited by the crossing of the railway and often brings great difficulty, and even if the crossing is finally realized, a large amount of manpower, material resources and time are consumed, so that the problem is very realistic. Therefore, in the present embodiment, in order to solve this problem, a gantry pier having a driving system is used to solve the above-mentioned drawbacks. Specifically, first pier 1 and second pier 2 are respectively arranged on two sides of barrier 3, then drive system is arranged on first pier 1, and certainly, drive system is arranged on second pier 2 and is not tasted, and the drive system is not primary or secondary. After the driving system is constructed, the prefabricated bent cap 5 can be directly driven by the driving system to cross the obstacle 3, so that the other end of the bent cap 5 is located on the second pier 2, for convenience of description, the end of the bent cap 5 on the first pier 1 is defined as a fixed end 50, and the other end of the bent cap 5 which can move greatly to cross the obstacle 3 is defined as a movable end 51. Therefore, various defects caused by field operation are avoided, construction is relatively simple, the whole construction time is far shorter than the time for field construction in the prior art, and the manufacturing time of the portal pier is further saved as the cover beam 5 is prefabricated. The barrier 3 described in this embodiment may be an existing railway line if it is in the railway field, or a road if it is in the highway field, and thus the portal pier may be applied to various fields.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1-4, a support 20 is disposed at a position where the second pier stud 2 receives the movable end 51 of the bent cap 5. In this embodiment, in order to make the movable end 51 of the bent cap 5 stable after it is dropped on the second pier 2, a seat 20 is provided to stand for dropping. Preferably, the movable end 51 located at the second pier stud 2 is fixed on the support 20 by a first fixing member, and the fixed end 50 is fixed on the driving system by a second fixing member. After the capping beam 5 is erected, the first fixing member and the second fixing member are preferably both made of concrete 6, and are fixed by the concrete 6, and the fixing manner may be other than concrete, and this embodiment is not limited thereto. Of course, if the second abutment 2 is provided with a drive system, then the first abutment 1 is provided with the support 20. For the pillars which are not arranged in the primary and secondary sequence, the following embodiments are not described again.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1-6, the driving system includes a swivel mechanism 4 that can drive the bent cap 5 to rotate with the fixed end 50 as a rotation point and make the movable end 51 fall on the second pier 2. In the present embodiment, the spanning manner is a rotation spanning manner, that is, the fixed end 50 of the capping beam 5 is used as a rotation point, the body of the capping beam 5 is used as a rotation radius, the swivel mechanism 4 is used to drive the capping beam 5 to rotate, in a preliminary stage, when the capping beam 5 is constructed along the forming direction, for example, a railway, the capping beam 5 is placed on one side of the railway, the length direction of the capping beam 5 is made to coincide with the traveling direction of the railway, the fixed end 50 of the capping beam 5 is used as a rotation point and is arranged on the first pier 1, the capping beam 5 can be rotated to span the railway by the rotation of the swivel mechanism 4 (the arrow in fig. 4 is the rotation direction, the broken line is the capping beam 5 before rotation), and finally the movable end 51 of the capping beam 5 is dropped on the second pier 2 to complete the construction of the portal pier, of course, the support 20, the concrete and the like described in the above embodiment are provided to make the portal pier more stable after the construction, the purpose of the concrete 6 is to perform sealing. On the other hand, besides the construction of the cap beam 5 by the swivel mechanism 4 through rotating spanning, the direct hoisting can be adopted, which is also a possible way, but the swivel mechanism 4 with a supporting point is more labor-saving and convenient to operate.

The swivel mechanism 4 is detailed, please refer to fig. 1 to 6, the swivel mechanism 4 includes an upper rotary table 40 and a lower rotary table 41 which are oppositely disposed, the upper rotary table 40 and the lower rotary table 41 are connected by a spherical hinge 42, and the fixed end 50 of the bent cap 5 is fixedly mounted on the upper rotary table 40; the swivel mechanism 4 further comprises a driving member for driving the cover beam 5 to rotate with the spherical hinge 42 as a rotation point. In this embodiment the upper turntable 40 and the lower turntable 41 are prefabricated from concrete and are connected by a ball joint 42, so that the cover beam 5 can be more easily carried over the obstacle 3. The swivel mechanism 4 includes two drag reaction mounts 44 and the rotating rear cap beam centerline 52 is varied. The lower turntable 41 is mounted on a ground foundation 46 by a positioning steel pin 45.

In order to further optimize the above solution, referring to fig. 1 to 6, the driving member includes a steel strand wound around the lower turntable 41, and a continuous jack capable of tensioning the steel strand and the capping beam 5. In this embodiment, the driving member is wound by a steel strand and then tensioned by a continuous jack. Preferably, the continuous jack is connected to the steel strand and the capping beam 5 by a back cable 43, the pulling is facilitated by the back cable 43, and an anchoring point 47 is provided on the slope 8 for anchoring the back cable 43.

Example two:

the embodiment of the utility model provides a viaduct please refer to fig. 1-7, including foretell portal pier, the portal pier the bent cap 5 is put on the shelf and is equipped with bridge 7. The portal pier is applied to the viaduct, so that the construction of the viaduct is facilitated, a plurality of defects caused by field construction in the prior art are overcome, and detailed description is omitted. The bridge 7 in fig. 3 and 4 is schematic.

For other steps of the viaduct, please refer to the first embodiment, which will not be described herein.

The specific construction method of the portal pier comprises the following steps: s1, constructing a first pier stud 1 and a second pier stud 2 on two sides of the barrier 3 in advance respectively, and prefabricating a bent cap 5; s2, installing a driving system on the first pier stud 1, and arranging one end of the prefabricated bent cap 5 on the first pier stud 1; and S3, after the construction and installation are completed, the driving system is adopted to drive the bent cap 5 to cross the barrier 3, and the other end of the bent cap 5 is made to fall on the second pier stud 2, so that the fabrication of the portal pier is completed. In the present embodiment, a trestle type pier having a driving system is used to solve the above-mentioned drawbacks. Specifically, first pier 1 and second pier 2 are respectively arranged on two sides of barrier 3, then drive system is arranged on first pier 1, and certainly, drive system is arranged on second pier 2 and is not tasted, and the drive system is not primary or secondary. After the driving system is constructed, the prefabricated bent cap 5 can be directly driven by the driving system to cross the obstacle 3, so that the other end of the bent cap 5 is located on the second pier 2, for convenience of description, the end of the bent cap 5 on the first pier 1 is defined as a fixed end 50, and the other end of the bent cap 5 which can move greatly to cross the obstacle 3 is defined as a movable end 51. Therefore, various defects caused by field operation are avoided, construction is relatively simple, the whole construction time is far shorter than the time for field construction in the prior art, and the manufacturing time of the portal pier is further saved as the cover beam 5 is prefabricated. The barrier 3 described in this embodiment may be an existing railway line if it is in the railway field, or a road if it is in the highway field, and thus the portal pier may be applied to various fields.

For other steps of the method, please refer to embodiment one, which will not be described herein.

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. The utility model provides a portal pier, is including locating first pier stud and the second pier stud of barrier both sides respectively, its characterized in that: still including locating actuating system on the first pier stud and can by actuating system drives the bent cap with the removal, the bent cap has to locate stiff end on the first pier stud and can by stride across after actuating system drives the barrier and fall in the expansion end on the second pier stud.

2. A trestle pier as defined in claim 1, wherein: and a support is arranged at the part of the second pier column, which receives the movable end of the bent cap.

3. A trestle pier as defined in claim 2, wherein: the movable end falling on the second pier stud is fixed on the support through a first fixing piece, and the fixed end is fixed on the driving system through a second fixing piece.

4. A trestle pier as defined in claim 3, wherein: the first fixing piece and the second fixing piece are both made of concrete.

5. A trestle pier as defined in claim 1, wherein: the driving system comprises a rotating mechanism which can drive the bent cap to rotate by taking a fixed end of the bent cap as a rotating point and enable the movable end to fall on the second pier column.

6. The trestle pier of claim 5, wherein: the rotating mechanism comprises an upper rotating disc and a lower rotating disc which are oppositely arranged, the upper rotating disc is connected with the lower rotating disc through a spherical hinge, and the fixed end of the cover beam is fixedly arranged on the upper rotating disc; the swivel mechanism further comprises a driving piece for driving the cover beam to rotate by taking the spherical hinge as a rotating point.

7. The trestle pier of claim 6, wherein: the driving piece comprises a steel strand wound on the lower rotary table and a continuous jack capable of tensioning the steel strand and the cover beam.

8. A trestle pier as defined in claim 7, wherein: and the continuous jack is connected with the steel strand and the bent cap through a back cable.

9. A viaduct is characterized in that: the trestle bridge pier comprises the trestle bridge pier as claimed in any one of claims 1 to 8, and a bridge is erected on the capping beam of the trestle bridge pier.