CN216515077U

CN216515077U - Utilize overhanging type pier to increase the overhead pipeline structure of span

Info

Publication number: CN216515077U
Application number: CN202122842623.1U
Authority: CN
Inventors: 虞鸿; 吴伟明; 张永进; 王芳; 朱明笛; 阙剑生; 董坚
Original assignee: Zhejiang Design Institute of Water Conservancy and Hydroelectric Power
Current assignee: Zhejiang Design Institute of Water Conservancy and Hydroelectric Power
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-05-13
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses an overhead pipeline structure for increasing span by utilizing overhanging type piers, which comprises anchor piers positioned on two banks, overhanging type piers, overhead pipelines, pipeline supports, maintenance temporary bridges arranged on two sides of the overhead pipelines and telescopic joints. Two side edges of the upper part of the overhanging and overhanging type pier are respectively provided with a pipeline support, and the whole overhead pipeline forms a continuous beam structure with long span and short span which are alternated; the two-end anchor blocks are used as fixed ends of the overhead pipeline, and the pipeline support is arranged in the middle of the overhead pipeline; the telescopic joint is arranged on the overhanging type pier in the middle of the two banks and is positioned in the middle of the short span; the overhaul access bridge is installed on two sides of the overhead pipeline by adopting the hoops, and the overhaul access bridge and the overhanging type piers are communicated by adopting the pedestrian oblique stepping to form an overhaul channel. The utility model effectively increases the overhead distance, can ensure the temperature expansion and adjustment performance, and can conveniently carry out pipeline maintenance and repair work.

Description

Utilize overhanging type pier to increase the overhead pipeline structure of span

Technical Field

The utility model relates to an overhead pipeline structure applied to hydraulic engineering and bridge construction, in particular to an overhead pipeline structure which utilizes overhanging type piers to increase span and is suitable for an application scene that the basic span is between 30 and 50m and no additional bearing structure is arranged.

Background

In long-distance water transmission projects, the problem that a water transmission line crosses natural or artificial obstacles such as rivers, lakes, reservoirs, mountain canyons, traffic lines and the like is often required to be solved. The existing solution is to arrange inverted siphon or overhead pipes to pass through from the lower part or the upper part of the obstacle after being staggered from the space. The scheme of the overhead pipeline under the common condition is flexible in arrangement, relatively good in operation condition, small in actual construction difficulty, friendly in environment influence and wide in application range.

The main types of overhead pipelines are pipe arches, girder type pipe bridges, suspension type pipe bridges, cable-stayed type pipe bridges, etc., among which the girder type pipe bridges are most commonly used, which support the pipelines on pipe frames in the form of continuous beams suitable for spatial crossing with a pedestal distance below 50 m. If the span between adjacent piers is less than 30m, the self bearing capacity of the pipeline material can be fully utilized for the pipeline with the pipe diameter between DN300 and DN1800, the pipe frame structure is simplified or even cancelled, and the self-supporting straight steel pipe is directly erected between the adjacent piers. However, when the span between adjacent piers reaches 30-50 m, the bearing capacity of the pipeline needs to be enhanced by adopting a truss structure, and the temperature deformation of the long-distance pipeline and the maintenance and curing conditions during the operation of the pipeline need to be treated. However, in practice, the pipeline is often restricted by factors such as sites and landscapes, and when the pipeline cannot be reinforced by adopting a truss structure, a light structure is needed, the pipeline can be stably supported, the adjusting device for temperature stretching deformation can be properly arranged, and the maintenance and the repair of the pipeline can be considered.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that the span of the existing self-supporting straight overhead steel pipe is insufficient, the utility model provides an overhead pipeline structure for increasing the span by using overhanging type piers, the structure can effectively increase the overhead distance between the piers by using the structural performance of a pipeline and a pipeline support, the adjustment performance of a temperature expansion device can be ensured, and the pipeline maintenance and repair work can be conveniently carried out.

In order to achieve the purpose, the utility model adopts the technical scheme that:

utilize the overhead pipeline structure of overhanging pier increase span, including the overhanging pier, overhead pipeline, the pipeline support that are arranged in the range of being located the anchor pier on both sides, built on stilts respectively, locate the maintenance temporary bridge of overhead pipeline both sides to and the telescopic joint. The lower structure of the overhanging type pier comprises a pile foundation, a bearing platform, an upright post and a longitudinal capping beam and is used for transmitting vertical load downwards. And the two side edges of the upper part of the overhanging and extending type pier are respectively provided with a pipeline support for supporting the overhead pipeline. The overhead pipeline part between two supports on the same overhanging type pier forms a short span, the overhead pipeline part between adjacent overhanging type piers forms a long span, and the whole overhead pipeline forms a continuous beam structure with the long span and the short span alternating with each other; the both ends anchor block is as the stiff end of overhead pipeline, the pipeline support is located the overhead pipeline along the line, as the simple support of overhead pipeline. The stress principle of the whole structure is that the internal force in a long span is reduced by utilizing the self-weight internal force of a short span on the overhanging pier, so that the aim of increasing the temporary space span between the overhanging pier is fulfilled; the telescopic joint is arranged on the overhanging type pier in the middle of two banks and positioned in the middle of the short span and used as a spring connection of overhead pipelines at two sides, and the overhead pipelines between the telescopic joint and the nearest pipeline support form an overhanging cantilever structure. The lengths of the overhead pipelines on the two sides of the telescopic joint are the same or the length difference of the overhead pipelines on the two sides is less than 5%, the vertical deformation sizes of the overhanging cantilever structures can be consistent or basically consistent, the relative displacement difference is minimum, and the adjusting performance of the telescopic joint can be fully exerted. The overhaul access bridge is installed on two sides of the overhead pipeline by adopting the hoops, and the overhaul access bridge is communicated with the overhanging type bridge piers by adopting the walking inclined stepping to form an overhaul channel. The maintenance access bridge comprises outer side handrails arranged on two sides of the maintenance access bridge, inner side handrails arranged on two sides of the overhead pipeline and a maintenance bridge floor, and is used for carrying out rust removal and corrosion prevention operation on the overhead pipeline. Adopt the equidistant connection of staple bolt between maintenance access bridge and the overhead line, set up inboard railing between the adjacent staple bolt and adopt welding or bolted connection with the staple bolt, inboard railing height should be greater than the clearance between overhead line and the maintenance bridge floor, prevents that personnel from falling.

In the above overhead pipeline structure, the pipeline support is composed of the support ring and a support lower structure, and the support ring can move or rotate on the support lower structure along the pipe axis direction to eliminate the temperature deformation of the overhead pipeline. And the lower part structure of the support is connected with the overhanging type pier by adopting an embedded part.

In the overhead pipeline structure, the overhanging and overhanging type piers are preferably arranged at equal intervals, and can also be arranged at unequal intervals near two banks according to actual landforms, but the distance between the overhanging and overhanging type piers is greater than the short span length; the structural dimension and the overhanging distance of the longitudinal capping beam can be completely the same, and the longitudinal capping beam can also be provided with proper size according to the requirement so as to adapt to the requirements of different span ranges. The pile foundation can adopt various types such as cast-in-place piles, steel pipe piles, precast concrete piles and the like. The plane shape of the bearing platform can be rectangular, triangular, circular and the like according to the arrangement mode of the piles. The length of the upright columns can be adjusted according to the longitudinal gradient requirement of the overhead pipeline, and the number of the upright columns can be selected from single columns, double columns or multiple columns.

In the above overhead pipeline structure, the material of the pipeline may be a material with load bearing capacity, such as common steel, stainless steel or glass fiber reinforced plastic. The pipeline support can adopt a movable mechanism in the forms of sliding, roll shaft or rotating and the like according to the axial deformation of the overhead pipeline. The expansion joint can be a corrugated or telescopic expansion joint according to the thermal expansion and cold contraction deformation of the pipeline.

The above overhead pipeline structure, the ballast block is used for fixing the overhead pipeline and the steering pipe joint, and can adopt a full-package type, a half-package type or an open type structure. The top of full package formula anchor block and the upper and lower traffic of overhauing between the temporary bridge can adopt and take the cage cat ladder, and the traffic mode between other types of anchor block and the overhaul temporary bridge can be according to forms such as discrepancy in elevation selection vertical ladder or inclined ladder.

The utility model has the beneficial effects that:

1. the internal force of the overhead pipeline is balanced by using a continuous beam structure formed by the overhanging type piers and having alternate long spans and short spans, so that the effect of increasing the distance between lower structures is achieved, and the spatial span of the distance of more than 30m between adjacent overhanging type piers is realized;

2. the expansion joint is arranged between the two pipeline supports on the overhanging type bridge pier in the middle of the overhead pipeline, the overhead pipelines on two sides of the expansion joint form an overhanging cantilever structure, and the vertical deformation synchronization characteristic ensures that the two sides of the expansion joint do not have relative displacement basically in the vertical direction. The expansion joint only needs to adjust the axial change of the pipeline caused by the thermal expansion and contraction of materials caused by sunshine exposure in summer and low-temperature water flow in the pipeline in winter.

3. The maintenance temporary bridges on the two sides are combined with the overhead pipelines, and an operation channel is provided for maintenance of the later-stage overhead pipelines.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of an overhanging pier of the present invention;

FIG. 3 is an isometric view of a telescopic joint arrangement in the middle of an overhead pipe of the present invention;

FIG. 4 is an isometric view of the overhead line and access bridge of the present invention;

figure 5 is an isometric view of a ballast structure;

figure 6 is an isometric view of the pipe holder.

In the figure, 1, a ballast pier, 2, an overhanging type pier, 3, an expansion joint, 4, an overhead pipeline, 5, an overhaul access bridge, 6, a pipeline support, 7, a hoop, 8, a pedestrian slant step, 9, a pile foundation, 10, a cushion cap, 11, an upright post, 12, a longitudinal capping beam, 13, an outer side rail, 14, an inner side rail, 15, an overhaul bridge floor, 16, a ladder with a cage, 17, a steering pipe joint, 18, a support ring, 19, a support lower structure and 20, a support embedded part are arranged.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

The utility model relates to an overhead pipeline structure for increasing span by utilizing overhanging type piers, which comprises anchor piers 1 positioned on two banks, overhanging type piers 2 arranged in an overhead range, an overhead pipeline 4 and maintenance temporary bridges 5 on two sides of the pipeline, and is shown in figure 1. Two pipeline supports 6 are arranged on the overhanging type pier 2 to support the empty pipeline 4, and a telescopic joint 3 is arranged at the center of the two supports on the overhanging type pier 2 at the half position of the whole spanning distance to connect the overhead steel pipes 4 at the two sides, as shown in fig. 3. The overhaul access bridge 5 is arranged on two sides of the overhead pipeline 4 by adopting anchor ears 7, and the overhaul access bridge 5 is communicated with the overhanging pier 2 by adopting a pedestrian oblique step 8.

The overhanging pier 2 comprises a pile foundation 9, a cap 10, a column 11 and a longitudinal capping beam 12, as shown in fig. 2.

The access bridge 5 comprises two outer side railings 13 on two sides, two inner side railings 14 on two sides of the pipeline and an access bridge floor 15, as shown in figure 4. The maintenance access bridge 5 is connected with the overhead pipeline 4 at equal intervals by the hoop 7, the inner side handrail 14 is also connected with the hoop 7, the height of the handrail is larger than the clearance between the overhead pipeline 4 and the maintenance bridge floor 15, and personnel are prevented from falling.

The ballast 1 is used for fixing the frame hollow pipe 4 and the steering knuckle 17 as shown in fig. 5. The ballast pier 1 and the maintenance access bridge 5 are also communicated by adopting a pedestrian inclined step 8. The anchor block 1 is provided with the ladder stand 16 with the protective cage, so that the maintainers can conveniently go up and down.

The pipe support 6 consists of a support ring 18 and a support substructure 19, as shown in fig. 6. The support ring 18 can be moved or rotated on the support substructure 19 in the direction of the pipe axis in order to relieve the temperature stress of the overhead pipe 4. The support substructure 19 is connected to the overhanging pier 2 using a support embedment 20.

The overhanging type piers 2 are preferably arranged at equal intervals and can also be arranged at unequal intervals according to actual landforms; the structure and the overhanging distance of the longitudinal capping beam 12 of each pier can be completely the same, and the capping beams can also have proper sizes according to requirements so as to adapt to the requirements of different spanning ranges. The pile foundation 9 can adopt various types such as cast-in-place piles, steel pipe piles, precast concrete piles and the like, the plane shape of the bearing platform 10 can be rectangular, triangular, circular and the like according to the arrangement mode of the piles, the length of the upright columns 11 can be adjusted according to the longitudinal gradient requirement of the overhead pipeline, and the number of the upright columns 11 can be selected from single columns, double columns or multiple columns.

The material for manufacturing the overhead steel pipe 4 can be common steel, stainless steel, glass fiber reinforced plastic or the like. The connecting mechanism of the pipeline support 6 can adopt the forms of sliding, roll shaft or rotation and the like according to the deformation of the overhead pipeline 4. The expansion joint 3 in the middle of the pipeline can be a corrugated or telescopic expansion joint according to the expansion and contraction deformation of the pipeline.

The ballast 1 may be of a full-bag, half-bag or open-top construction. The ladder stand 16 with the cage can be arranged according to the height difference of the terrain or adopt the forms of a straight ladder, an inclined ladder and the like.

It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. Utilize the overhead pipeline structure of overhanging pier increase span, its characterized in that: the device comprises anchor piers respectively positioned on two banks, overhanging type pier arranged in an overhead range, an overhead pipeline, a pipeline support, maintenance access bridges arranged on two sides of the overhead pipeline and telescopic joints; the lower structure of the overhanging type pier comprises a pile foundation, a bearing platform, an upright post and a longitudinal capping beam and is used for transmitting vertical load downwards; the pipeline support is arranged on the edges of two sides of the upper part of the overhanging type pier and used for supporting the overhead pipeline; the overhead pipeline part between two supports on the same overhanging type pier forms a short span, the overhead pipeline part between adjacent overhanging type piers forms a long span, and the whole overhead pipeline forms a continuous beam structure with the long span and the short span alternating with each other; the two-end anchor blocks are used as fixed ends of the overhead pipeline, and the pipeline support is arranged in the middle of the overhead pipeline and used as a simple support of the overhead pipeline; the telescopic joint is arranged on the overhanging type pier in the middle of two banks and positioned in the middle of the short span and used as a spring connection of overhead pipelines at two sides, and the overhead pipeline between the telescopic joint and the nearest pipeline support forms an overhanging cantilever structure; the overhaul access bridge is installed on two sides of the overhead pipeline by adopting the hoops, and the overhaul access bridge is communicated with the overhanging type bridge piers by adopting the walking inclined stepping to form an overhaul channel.

2. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the lengths of the overhead pipelines on the two sides of the telescopic joint are the same or the length difference of the overhead pipelines on the two sides is less than 5%.

3. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the maintenance access bridge comprises outer side railings arranged on two sides of the maintenance access bridge, inner side railings arranged on two sides of the overhead pipeline and a maintenance bridge floor, and is used for carrying out rust removal and corrosion prevention operation on the overhead pipeline; the maintenance access bridge and the overhead pipeline are connected at equal intervals by adopting hoops, and the inner side handrails are welded or connected with the hoops by bolts.

4. The overhead pipeline structure for increasing the span by using the overhanging pier according to claim 3, wherein: the height of the inner side rail is larger than the clearance between the overhead pipeline and the overhaul bridge floor, so that personnel can be prevented from falling.

5. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the pipeline support consists of a support ring and a support mechanism, wherein the support ring can move or rotate along the direction of a pipe shaft on a lower structure of the support to eliminate the temperature stress of the overhead pipeline; and the lower part structure of the support is connected with the overhanging type pier by adopting an embedded part.

6. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the overhanging type piers are arranged at equal intervals; or the overhanging type piers are arranged near two banks at unequal intervals according to the actual terrain, but the distance between the overhanging type piers is larger than the short span length.

7. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the pile foundation adopts a cast-in-place pile, a steel pipe pile or a precast concrete pile.

8. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the plane shape of the bearing platform is rectangular, triangular or circular according to the arrangement mode of the piles.

9. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the pipeline support adopts a sliding or roll shaft or a rotary moving mechanism according to the axial deformation of the overhead pipeline; the expansion joint adopts a corrugated or sleeve expansion joint according to the thermal expansion and cold contraction deformation of the pipeline.

10. The overhead pipeline structure for increasing the span by using the overhanging type pier according to claim 1, wherein: the ballast pier is used for fixing the overhead pipeline and the steering pipe joint and adopts a full-package type, or semi-package type or open type structure; the top of full package formula anchor block with traffic about overhauing between the temporary bridge adopts the area to protect the cage cat ladder, and traffic between half package formula anchor block or the open type anchor block and the temporary bridge of overhauing adopts vertical ladder or inclined ladder according to the difference in height.