CN113863111A

CN113863111A - Bridge structure

Info

Publication number: CN113863111A
Application number: CN202111108974.8A
Authority: CN
Inventors: 王斌; 赵剑锋; 沈哲亮; 文望青; 严爱国; 陈晓辉; 刘显陆; 彭小林; 吴积胜; 武兵; 李的平; 徐长节; 吴亮秦
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2021-12-31
Anticipated expiration: 2041-09-22
Also published as: CN113863111B

Abstract

The invention provides a bridge structure, comprising: the main beam extends along a first direction; the invisible bent cap is fixedly connected with the main beam and extends along a second direction to form a cross structure with the main beam; the pair of upright posts are spaced in the second direction and are rigidly connected with the invisible bent cap, the upright posts extend along a third direction, and the third direction is perpendicular to the first direction and the second direction; a plurality of activity pier stud set up in the first direction the both sides of stand, just activity pier stud with the girder passes through the movable support and connects.

Description

Bridge structure

Technical Field

The invention belongs to the technical field of bridges, and particularly relates to a bridge structure.

Background

The top of the bridge structure applied to the railway field is used for laying a railway, the related bridge structure adopts a mode that a main beam is connected with an invisible capping beam, the extending direction of the main beam is called longitudinal direction, the extending direction of the invisible capping beam is called transverse direction, the invisible capping beams are arranged on two sides of the main beam, and the invisible capping beams are supported by stand columns and are connected with the stand columns through supports, so that the transverse displacement of the main beam is not easy to control, and the safety of the track structure and the running safety of a train are influenced.

Disclosure of Invention

In view of this, the present invention provides a bridge structure to solve the technical problem of how to improve the coordination of the lateral deformation of the main beam at each position.

The technical scheme of the invention is realized as follows:

an embodiment of the present invention provides a bridge structure, including:

the main beam extends along a first direction;

the invisible bent cap is fixedly connected with the main beam and extends along a second direction to form a cross structure with the main beam;

the pair of upright posts are spaced in the second direction and are rigidly connected with the invisible bent cap, the upright posts extend along a third direction, and the third direction is perpendicular to the first direction and the second direction;

a plurality of activity pier stud set up in the first direction the both sides of stand, just activity pier stud with the girder passes through the movable support and connects.

In some embodiments, the main beam and the invisible capping beam are located at the same horizontal plane.

In some embodiments, a pair of movable pillars is correspondingly arranged at the same position of the main beam in the first direction, and the same pair of movable pillars is arranged at intervals in the second direction.

In some embodiments, one movable support corresponding to each movable abutment is a longitudinal movable support capable of moving along the first direction.

In some embodiments, the one cradle and the invisible capping beam have a zero point of transverse deformation in the second direction that is in a first line.

In some embodiments, the other movable support in the same pair of movable abutments is a multi-directional movable support movable in the first and second directions.

In some embodiments, the other movable support corresponding to each movable abutment is located on the second straight line.

In some embodiments, the first line is parallel to the second line.

In some embodiments, at least one of the pair of posts is adjustable in position relative to the invisible capping beam in the second direction.

In some embodiments, the mobile abutment comprises:

a pair of secondary middle piers symmetrically arranged relative to the upright column in the first direction, wherein the distance from each secondary middle pier to the upright column in the first direction is L1;

a pair of side piers symmetrically disposed in a first direction with respect to the column and each side pier is spaced from the column by a distance L2 in the first direction, wherein L2 is greater than L1.

The embodiment of the invention provides a bridge structure which comprises a main beam, invisible capping beams, upright columns and movable pier columns, wherein the main beam extends along a first direction, the invisible capping beams are fixedly connected with the main beam, the invisible capping beams extend along a second direction to form a cross structure with the main beam, the first direction is vertical to the second direction, the invisible capping beams of the upright columns are rigidly connected, and the movable pier columns are arranged on two sides of the upright columns in the first direction. According to the embodiment of the invention, the pair of upright columns is rigidly connected with the invisible bent cap, so that a large support is omitted, and the production cost is reduced; and the vertical columns are rigidly connected with the invisible capping beams, so that the transverse deformation zero points of the invisible capping beams and other movable pier columns are positioned on the same straight line, and the transverse deformation consistency of all positions of the main beams can be realized.

Drawings

FIG. 1 is a side view of a bridge construction according to an embodiment of the present invention;

FIG. 2 is a top view of a bridge construction according to an embodiment of the present invention;

FIG. 3 is a schematic view of a portion of a bridge structure according to an embodiment of the invention;

fig. 4 is a sectional view of the portion L-L in fig. 3.

Description of reference numerals:

1. a main beam; 2. invisible capping beams; 3. a column; 4. a movable pier stud; 41. secondary middle pier; 41a, a first middle pier; 41b, secondary middle pier; 42. side piers; 42a, a first side pier; 42b, a second side pier; 5. a movable support; 51. a longitudinal movable support; 52. a multidirectional movable support.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The individual features described in the embodiments can be combined in any suitable manner without departing from the scope, for example different embodiments and aspects can be formed by combining different features. In order to avoid unnecessary repetition, various possible combinations of the specific features of the invention will not be described further.

In the following description, the term "first/second/so" is used merely to distinguish different objects and does not mean that there is a common or relationship between the objects. It should be understood that the description of the "upper", "lower", "outer" and "inner" directions as related to the orientation in the normal use state, and the "left" and "right" directions indicate the left and right directions indicated in the corresponding schematic drawings, and may or may not be the left and right directions in the normal use state.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. "plurality" means greater than or equal to two.

Embodiments of the present invention provide a bridge structure that can be applied to structures such as high-speed railways and highways through which vehicles, pedestrians, and the like can smoothly pass. High speed railway refers to a railway that may run at speeds greater than 250 km/h. It should be noted that the application scenario type in the embodiment of the present invention does not limit the bridge structure in the embodiment of the present invention.

The following description is made in a scenario where the bridge structure is applied to a high-speed railway, and as shown in fig. 1 to 4, an embodiment of the present invention provides a bridge structure including a main beam 1, an invisible capping beam 2, a pair of columns 3, and a plurality of movable piers 4. Wherein the main beam 1 is used for carrying and transferring loads.

Wherein, the load that girder 1 bore includes dead load, live load and other loads. The dead load is also called as permanent load, and the dead load of the bridge structure does not change along with time or can be ignored compared with the average value in the design service life of the bridge structure. The constant load of the bridge structure consists of six parts, namely the structure gravity, the pre-stress, the gravity and the soil side pressure of the soil, the shrinkage and creep influence force of the concrete, the foundation displacement influence force, the buoyancy of water and the like of the bridge structure. Among them, the concrete shrinkage and creep influence force, the foundation displacement influence force, and the buoyancy of water are generally time-dependent, but are also included as permanent loads in consideration of the fact that these forces are inevitably generated, act for a long time, and change slowly. Live loads are generally represented by common live loads and special live loads. The common live load is the weight of the rolling stock; special live loads represent some concentrated axle weights (which are decisive for the design of small span bridges and local beams). Because the axle weights and the axle distances of different types of locomotives (or vehicles) are different, the design is carried out according to the live load of the train formulated by the current design specifications. The live load can not only summarize the actual situation of the current locomotive vehicle, but also consider the future development. Other loads include: wind, earthquake, etc., generally, the wind force acting on the bridge structure is regarded as a horizontal static force in any direction; in addition, there are running water pressure, ice pressure, impact of ships, rafts or drifters, and temporary loads occurring at construction stages as the case may be.

As shown in fig. 1, the main beam 1 extends along a first direction (a left-right direction shown in fig. 1, the first direction is a longitudinal direction), and the invisible bent cap 2 extends along a second direction (a direction perpendicular to the paper surface shown in fig. 1, the second direction is a transverse direction), so that the invisible bent cap 2 and the main beam 1 form a cross-shaped structure; wherein the second direction is substantially perpendicular to the first direction. The substantially perpendicular includes the case where the angle between the first direction and the second direction is not strictly 90 degrees, and the angle between the two directions is considered to be greater than 80 degrees, i.e. the two directions are substantially perpendicular, so that the case of processing and installation errors can be covered. Of course, in other embodiments, the first direction and the second direction may not be perpendicular, and the first direction and the second direction may be adaptively adjusted according to specific working conditions.

As shown in fig. 1, the main beam 1 and the hidden cover beam 2 are located at the same horizontal plane, that is, the height of the bridge structure in the embodiment of the present invention is low, wherein for the associated gate-type pier structure, the main beam is supported above the gate-type pier cover beam, and the main beam and the gate-type pier cover beam are in an upper-layer structure and a lower-layer structure in the vertical direction, so that the height of the associated bridge structure is large. In the bridge structure in the embodiment of the invention, the invisible bent cap 2 and the main beam 1 form a cross-shaped integral structure, and the invisible bent cap and the main beam are basically positioned at the same height, so that the integral height of the bridge structure is smaller, and the bridge structure is favorable for being applied to a scene of crossing structures under a bridge and is particularly suitable for an upper-crossing design working condition with limited beam height. The bridge structure provided by the embodiment of the invention has the advantages of good structural system integrity and high structural rigidity.

As shown in fig. 4, the invisible bent cap 2 is fixedly connected with the main beam 1, and under the condition that the invisible bent cap 2 is rigidly connected with the upright post 3, the invisible bent cap 2, the main beam 1 and the upright post 3 form a continuous beam structure system of the invisible bent cap gate-type pier T. According to the related portal pier structure, the main beam is supported above the portal pier capping beam, the main beam and the portal pier capping beam are of an upper layer structure and a lower layer structure, the total bridge structure is large in height, and the occupied space is large. The invisible capping beam and the main beam form a cross-shaped integral structure, and the invisible capping beam and the main beam are basically positioned at the same height, so that the height of the total bridge structure is smaller, the invisible capping beam and the main beam can be suitable for a scene of crossing structures under a bridge, and the problem of clearance limitation under the condition of the existing structures is solved.

As shown in fig. 2, the columns 3 are spaced in the second direction (the up-down direction shown in fig. 2) and are rigidly connected to the invisible capping beam 2, that is, two columns 3 are respectively fixed to the invisible capping beam 2, and no support is provided between the column 3 and the invisible capping beam 2, so that the column 3 is a fixed pier and extends in the third direction (the direction perpendicular to the paper surface shown in fig. 2), which is perpendicular to both the first direction and the second direction, and the third direction can be regarded as the vertical direction in the use state. Through concreting stand 3 and stealthy bent cap 2 rigid, compare in the mode that adopts support to connect stand and bent cap among the correlation technique, the experiment reachs that the horizontal deformation zero point Z of stealthy bent cap 2 is roughly located stealthy bent cap 2's central point department for stand and girder atress jointly have reduced the moment of flexure of girder, thereby have controlled stealthy bent cap's lateral displacement. The transverse deformation indicates that the main beam is deformed in the second direction (transverse direction) when the main beam contracts and creeps under the influence of temperature, wherein the transverse deformation zero point Z indicates a position where the deformation amount of the main beam in the second direction is substantially zero.

As shown in fig. 2, the position of the transverse deformation zero point Z of the invisible capping beam 2 is also related to other factors, for example, the distance between each of the two columns and the midpoint of the main beam in the second direction can be adjusted by adjusting the length of the invisible capping beam 2 in the second direction (the up-down direction shown in fig. 2) to change the position of the transverse deformation zero point Z of the main beam. Of course, the zero point Z of the transverse deformation of the main beam is also related to the rigidity of the two struts and other factors.

As shown in fig. 1, a plurality of movable piers 4 are arranged at two sides of the upright column in the first direction, and the movable piers are connected with the main beam through movable supports. The main beam 1 in the embodiment of the present invention is a continuous beam, that is, the main beam 1 is provided with three or more piers in the first direction (the left-right direction shown in fig. 1). The pier is a sub-building which supports a bridge structure and transmits constant load and live load of a vehicle to a foundation. The pier in the middle part of the continuous beam is a middle pier (namely the upright 3 in the embodiment of the invention), the upright 3-position fixed pier in the embodiment of the invention, the pier close to the middle pier in the continuous beam is a secondary middle pier 41, the pier far away from the middle pier relative to the secondary middle pier 41 in the continuous beam is a side pier 42, and the secondary middle pier and the side pier in the embodiment of the invention are both movable piers 4.

The embodiment of the invention provides a bridge structure which comprises a main beam, invisible capping beams, upright columns and movable pier columns, wherein the main beam extends along a first direction, the invisible capping beams are fixedly connected with the main beam, the invisible capping beams extend along a second direction to form a cross structure with the main beam, the first direction is vertical to the second direction, the invisible capping beams of the upright columns are rigidly connected, and the movable pier columns are arranged on two sides of the upright columns in the first direction. According to the embodiment of the invention, the pair of upright columns is rigidly connected with the invisible bent cap, so that a large support is omitted, and the production cost is reduced; and the mode of consolidation is adopted, the upright posts and the main beam are stressed together, and the bending moment of the main beam is smaller than that of the continuous beam and the simply supported beam with the same span, so that the integral structure of the bridge structure is higher in rigidity, and the longitudinal and transverse thrust rigidity of the bridge span structure is improved.

In some embodiments, as shown in fig. 1, movable pier 4 comprises a pair of secondary middle piers 41 and a pair of side piers 42, symmetrically arranged with respect to upright 3 in a first direction (left-right direction shown in fig. 1, longitudinal direction), and each secondary middle pier 41 is at a distance L1 from upright 3 in the first direction; the side abutments 42 are arranged symmetrically with respect to the upright 3 in the first direction and each side abutment 42 is spaced from the upright 3 by a distance L2 in the first direction, wherein L2 is greater than L1. That is, the side pier 42 is disposed on the side of the sub-middle pier 41 relatively distant from the column 3 in the first direction.

In some embodiments, as shown in fig. 1, the plurality of movable abutments 4 are disposed symmetrically with respect to the upright 3 in the first direction (the left-right direction shown in fig. 1). That is to say, in the length direction of girder 1, all be provided with activity pier stud 4 with the both sides that the stand 3 distance equals. For example, two sub-middle piers 41 and two side piers 42 are provided in the first direction, the two sub-middle piers 41 are symmetrically provided with respect to the column 3 in the first direction, and the two side piers 42 are also symmetrically provided with respect to the column 3 in the first direction. The number of the movable piers is not limited in the embodiment of the invention, and in other embodiments, the number of the movable piers can be set according to factors such as actual construction environment and the like. According to the embodiment of the invention, the movable pier columns are symmetrically arranged opposite to the opposite columns in the first direction, so that the longitudinal deformation of the main beam is coordinated and consistent, the longitudinal deformation of the main beam is reduced, and the stability of the main beam is improved.

In some embodiments, as shown in fig. 2, a pair of movable abutments 4 is disposed on the main beam 1 at the same position in the first direction (the left-right direction shown in fig. 2, the longitudinal direction), and the same pair of movable abutments 4 is disposed at intervals in the second direction (the up-down direction shown in fig. 2, the transverse direction). For example, the secondary middle piers 41 in fig. 2 are provided in two, respectively, a first secondary middle pier 41a and a second secondary middle pier 41b, the first secondary middle pier 41a and the second secondary middle pier 41b being disposed at intervals in the second direction (the up-down direction shown in fig. 2, the lateral direction); the side abutments 42 are provided in two, respectively first and second side abutments 42a and 42b, the first and second side abutments 42a and 42b being spaced apart in a second direction (up and down direction shown in fig. 2, transverse direction). The second direction is not limited to a direction of a straight line, but may be a direction of a set of parallel lines, for example, the second direction is a vertical direction, and is not limited to a straight line extending vertically. According to the embodiment of the invention, the pair of movable pier columns is correspondingly arranged at the same position of the main beam in the first direction, and the same pair of movable pier columns is arranged at intervals in the second direction, so that the stability of the bridge structure is improved.

In some embodiments, as shown in fig. 1 and 2, one movable support 5 corresponding to each movable abutment 4 is a longitudinal movable support 51 movable in a first direction (left-right direction shown in fig. 2, transverse direction). It should be noted that, in the embodiment of the present invention, the longitudinal extending direction of the main beam 1 is defined as a first direction, and the first direction is the longitudinal direction of the main beam 1, and correspondingly, the direction perpendicular to the first direction is defined as a second direction, and the second direction is the longitudinal direction of the main beam 1. The longitudinal movable support 51 indicates that the movable support connects the movable pier stud 4 and the main beam 1, and the main beam 1 can move in a first direction relative to the movable pier stud 4, and the movement in the embodiment of the present invention can be a relative movement generated by the main beam under the action of a constant load, a live load and other loads. In addition, the longitudinal movable support 51 in the embodiment of the present invention is further used to indicate that the movement of the main beam 1 and the movable pier stud 4 in the second direction is limited, that is, in the process of vibration of the main beam 1, the longitudinal movable support 51 limits the vibration of the main beam 1 in the second direction, so that the longitudinal displacement of the main beam 1 is reduced, and the longitudinal stability of the main beam 1 is improved.

In some embodiments, the zero point Z of the transverse deformation of one cradle 5 and the invisible capping beam 2 in the second direction lies on the first line a. The movable support is the longitudinal movable support in the embodiment, at least one of the same pair of movable supports is set as the longitudinal movable support, and the longitudinal movable supports of the movable piers in the first direction and the transverse deformation zero point Z of the invisible bent cap are positioned on the first straight line A, so that the transverse displacement of each movable pier of the main beam in the first direction tends to be consistent, and the transverse displacement difference of each movable pier is reduced.

When the embodiment of the invention is applied to transportation of a high-speed railway, when a concrete bridge is connected with a roadbed or a steel bridge and the temperature of a main beam changes, stress of a ballastless track structure on the bridge and rail-direction irregularity are influenced due to the difference of transverse telescopic displacement of two sides of a beam joint. According to the embodiment of the invention, the transverse deformation zero point Z of the movable support and the invisible capping beam in the second direction is positioned on the first straight line, so that the transverse deformation coordination of the main beam at each movable pier column is realized, the transverse displacement difference of the main beam at each movable pier column is reduced, the smoothness of a ballastless track structure can be improved, and the safety and the comfort of the operation of a high-speed train are further improved.

In some embodiments, as shown in fig. 2, the other movable support in the same pair of movable abutments 4 is a multi-directional movable support 52 that is movable in a first direction (left-right direction in fig. 2, longitudinal direction) and a second direction (up-down direction in fig. 2, lateral direction). That is to say, the main beam 1 is correspondingly provided with a pair of movable pillars 4 at the same position in the first direction, one of the movable pillars 4 is a longitudinal movable support 51, and the other is a multidirectional movable support 52. The movable pier stud 4 and the main beam 1 connected with the multidirectional movable support 52 can move relatively in all directions, for example, the position where the main beam 1 is connected with the multidirectional movable support 52 can move relatively to the movable pier stud 4 in a first direction (the left and right directions shown in fig. 2, the longitudinal direction) and a second direction (the up and down directions shown in fig. 2, the transverse direction), the longitudinal movable support 51 is adopted to limit the deformation of the main beam 1 in the longitudinal direction, and the multidirectional movable support 52 is used for absorbing the vibration of the main beam 1 relative to the movable pier stud 4, so that the stability and the safety of the bridge are improved.

In some embodiments, as shown in fig. 2, the other cradle corresponding to each mobile abutment 4 is located on the second straight line B. That is to say, the multidirectional movable support 52 that every activity pier stud 4 corresponds all is located second straight line B, through setting up multidirectional movable support on a straight line, can improve the uniformity that the girder warp to reduce the girder lateral displacement difference of each activity pier stud department, can improve ballastless track structure's ride comfort, and then improved the security and the travelling comfort of high-speed train operation.

In some embodiments, as shown in fig. 2, the first line a is parallel to the second line B. It should be noted that the first straight line a and the second straight line B in the embodiment of the present invention may be understood as being substantially parallel, and substantially parallel means that an included angle between the first straight line a and the second straight line B is less than or equal to 10 °. According to the embodiment of the invention, the first straight line A and the second straight line B are parallel, so that the coordination of the main beam in all directions is improved, the smoothness of a ballastless track structure can be improved, and the safety and the comfort of the operation of a high-speed train are further improved.

In some embodiments, as shown in fig. 2, at least one upright 3 of the pair of uprights 3 is adjustable in position with respect to the hidden canopy beam 2 in a second direction (up-down direction, lateral direction, shown in fig. 2). According to the embodiment of the invention, the position of the transverse deformation zero point Z of the main beam can be changed by adjusting the length of the invisible bent cap 2 in the second direction (the vertical direction and the transverse direction shown in fig. 2), so that the transverse deformation zero point Z of the main beam is closer to the first straight line A, and the stability of the main beam is improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A bridge construction, comprising:

the main beam extends along a first direction;

2. The bridge construction of claim 1, wherein the main beam and the invisible capping beam are located at the same horizontal plane.

3. The bridge structure of claim 2, wherein the main beam is provided with a pair of movable piers at the same position in the first direction, and the movable piers are spaced in the second direction.

4. The bridge structure of claim 3, wherein the mobile support corresponding to each mobile pier is a longitudinal mobile support that can move along the first direction.

5. The bridge construction of claim 4, wherein the one cradle and the invisible capping beam have a zero point of transverse deformation in the second direction that is in a first line.

6. The bridge structure of claim 5, wherein the other cradle in the same pair of said floating piers is a multi-directional cradle movable in said first and second directions.

7. The bridge construction of claim 6, wherein another cradle corresponding to each of the plurality of mobile abutments is located on a second straight line.

8. The bridge construction of claim 7, wherein the first line is parallel to the second line.

9. The bridge construction of claim 4, wherein at least one of the pair of columns is adjustable in position relative to the invisible capping beam in the second direction.

10. The bridge construction of claim 4, wherein the movable pier comprises: