CN113863111B - Bridge structure - Google Patents
Bridge structure Download PDFInfo
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- CN113863111B CN113863111B CN202111108974.8A CN202111108974A CN113863111B CN 113863111 B CN113863111 B CN 113863111B CN 202111108974 A CN202111108974 A CN 202111108974A CN 113863111 B CN113863111 B CN 113863111B
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- movable
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- main beam
- piers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a bridge structure, comprising: a main beam extending in 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 upright posts are spaced in the second direction and are rigidly connected with the invisible bent cap, extend along a third direction and are perpendicular to the first direction and the second direction; the movable pier columns are arranged on two sides of the upright columns in the first direction, and the movable pier columns are connected with the main beams through movable supports.
Description
Technical Field
The invention belongs to the technical field of bridges, and particularly relates to a bridge structure.
Background
The bridge structure applied to the railway field is used for paving a railway at the top of the bridge structure, the related bridge structure adopts a mode that a main beam is connected with an invisible bent cap, the extending direction of the main beam is called as the longitudinal direction, the extending direction of the invisible bent cap is called as the transverse direction, the invisible bent cap is arranged on two sides of the main beam, and the invisible bent cap is supported by a stand column and is connected with the stand column through a support, so that the transverse displacement of the main beam is not easy to control, and 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 transverse deformation of each position of the main beam.
The technical scheme of the invention is realized as follows:
the embodiment of the invention provides a bridge structure, which comprises:
a main beam extending in 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 upright posts are spaced in the second direction and are rigidly connected with the invisible bent cap, extend along a third direction and are perpendicular to the first direction and the second direction;
the movable pier columns are arranged on two sides of the upright columns in the first direction, and the movable pier columns are connected with the main beams through movable supports.
In some embodiments, the main beams are located at the same level as the hidden cap beams.
In some embodiments, the main beams are correspondingly provided with a pair of movable piers at the same position in the first direction, and the movable piers of the same pair are arranged at intervals in the second direction.
In some embodiments, one of the movable abutments corresponding to each of the movable abutments is a longitudinal movable abutment movable in the first direction.
In some embodiments, the zero point of the lateral deformation of the one cradle and the hidden cap beam in the second direction is located in a first straight line.
In some embodiments, the other cradle of the same pair of mobile abutment is a multi-directional cradle movable in the first and second directions.
In some embodiments, the other movable support corresponding to each movable pier is located on the second straight line.
In some embodiments, the first line is parallel to the second line.
In some embodiments, the position of at least one of the pair of posts relative to the hidden cap beam in the second direction is adjustable.
In some embodiments, the movable pier stud comprises:
the pair of sub-middle piers are symmetrically arranged relative to the upright post in the first direction, and the distance from each sub-middle pier to the upright post in the first direction is L1;
the pair of side piers are symmetrically arranged relative to the upright posts in the first direction, and the distance from each side pier to the upright posts in the first direction is L2, wherein L2 is larger than L1.
The embodiment of the invention provides a bridge structure, which comprises a main beam, an invisible bent cap, upright posts and movable pier columns, wherein the main beam is arranged in an extending mode along a first direction, the invisible bent cap is fixedly connected with the main beam, the invisible bent cap extends along a second direction to form a cross-shaped structure with the main beam, the first direction is perpendicular to the second direction, the upright posts are in rigid connection, and the movable pier columns are arranged on two sides of the upright posts in the first direction. According to the embodiment of the invention, the mode of rigidly connecting the pair of upright posts and the invisible bent cap is adopted, so that a large support is omitted, and the production cost is reduced; and the upright posts are rigidly connected with the invisible bent cap, so that the transverse deformation zero points of the invisible bent cap and other movable pier columns are positioned on the same straight line, and the transverse deformation consistency of all positions of the main beam can be realized.
Drawings
FIG. 1 is a side view of a bridge structure in accordance with an embodiment of the present invention;
FIG. 2 is a top view of a bridge structure 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 present invention;
fig. 4 is a sectional view of the L-L portion of fig. 3.
Reference numerals illustrate:
1. a main beam; 2. invisible bent cap; 3. a column; 4. a movable pier column; 41. secondary middle piers; 41a, first middle pier; 41b, second middle pier; 42. side piers; 42a, a first side pier; 42b, second side piers; 5. a movable support; 51. a longitudinal movable support; 52. multidirectional movable support.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The individual features described in the specific embodiments can be combined in any suitable manner, without contradiction, for example by combination of different specific features, to form different embodiments and solutions. Various combinations of the specific features of the invention are not described in detail in order to avoid unnecessary repetition.
In the following description, references to the term "first/second/are merely to distinguish between different objects and do not indicate that the objects have the same or a relationship therebetween. It should be understood that references to orientations of "above", "below", "outside" and "inside" are all orientations in normal use, and "left" and "right" directions refer to left and right directions illustrated in the specific corresponding schematic drawings, and may or may not be left and right directions in normal use.
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 one … …" 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.
The embodiment of the invention provides a bridge structure which can be applied to structures such as high-speed railways, highways and the like capable of enabling vehicles, pedestrians and the like to pass smoothly. High speed railways refer to railways that may run at speeds greater than 250 km/h. The application scene type of the embodiment of the invention is not limited to the bridge structure of the embodiment of the invention.
The following describes a scenario of applying a bridge structure to a high-speed railway, as shown in fig. 1 to 4, an embodiment of the present invention provides a bridge structure, which includes a main beam 1, an invisible capping beam 2, a pair of upright posts 3, and a plurality of movable pier posts 4. Wherein the main girder 1 is used for carrying and transferring loads.
The loads to which the main beam 1 is subjected include constant load, live load and other loads. The constant load is also known as "permanent load", and does not change over time or changes in the constant load of the bridge structure are negligible compared to the average value over the designed lifetime of the bridge structure. The constant load of the bridge structure consists of six parts including the structural gravity, the prestress, the gravity of soil, the side pressure of the soil, the shrinkage and creep influence of the concrete, the foundation deflection influence and the buoyancy of water. Among them, concrete shrinkage and creep influence, foundation deflection influence and buoyancy of water are generally time-dependent, but considering that these forces are necessarily generated, long-acting and slowly varying, they are also included in the permanent load. The live load is generally represented by a normal live load and a special live load. The common live load is the weight of the rolling stock; special live loads represent some concentrated axle weights (which play a decisive role in the design of small span bridges and local bars). Because the axle weights and the axle bases of locomotives (or vehicles) of different models are different, the train live load is designed according to the current design specification. The live load can not only summarize the actual situation of the current rolling stock, but also consider future development. Other loads include: wind, earthquake, etc., generally consider the wind force acting on a bridge structure as a horizontal static force in any direction; in addition, there are still running water pressure, ice pressure, impact force of ships, rafts or drifts, temporary load occurring at the construction stage depending on the case, and the like.
As shown in fig. 1, the main beam 1 extends along a first direction (left-right direction shown in fig. 1, namely, a longitudinal direction), and the invisible bent cap 2 extends along a second direction (vertical to the paper surface direction shown in fig. 1, namely, a transverse direction), so that the invisible bent cap 2 and the main beam 1 form a cross structure; wherein the second direction is substantially perpendicular to the first direction. The substantially vertical includes the case where the angle between the first direction and the second direction is not strictly 90 degrees, and it can be considered that the angle between the two directions is more than 80 degrees, i.e., belongs to the substantially vertical, so that the case of machining 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 invisible bent cap 2 are located on the same horizontal plane, that is, the height of the bridge structure in the embodiment of the invention is lower, wherein for the related gate pier structure, the main beam is supported above the gate pier bent cap, and the main beam and the gate pier bent cap are in an upper layer structure and a lower layer structure in the vertical direction, so that the height of the related bridge structure is larger. In the bridge structure provided by the embodiment of the invention, the invisible bent cap 2 and the main girder 1 form a cross-shaped integral structure, and the invisible bent cap 2 and the main girder 1 are basically positioned at the same height, so that the integral height of the bridge structure is smaller, and the bridge structure is beneficial to being applied to a scene of crossing a structure under a bridge, and is particularly suitable for a crossing design working condition with limited girder 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 hidden cap beam 2 is fixedly connected with the main beam 1, and under the condition that the hidden cap beam 2 is just connected with the upright post 3, the hidden cap beam 2, the main beam 1 and the upright post 3 jointly form a hidden cap beam door type pier T-shaped continuous beam structure system. In the related gate pier structure, the main beam is supported above the gate pier capping beam, the main beam and the gate pier capping beam are of an upper layer structure and a lower layer structure, the total bridge structure is large in height and occupies more space. The invisible bent cap and the main beam in the embodiment of the invention 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 height of the total bridge structure is smaller, thereby being applicable to a scene of crossing an under-bridge structure and solving the problem of limited clearance under the condition of the existing structure.
As shown in fig. 2, the upright posts 3 are spaced in a second direction (up-down direction shown in fig. 2) and are rigidly connected with the hidden cap beam 2, that is, two upright posts 3 are respectively fixedly connected with the hidden cap beam 2, no support is arranged between the upright posts 3 and the hidden cap beam 2, so that the upright posts 3 are fixed piers, extend along a third direction (vertical direction of the paper surface shown in fig. 2), are vertical to the first direction and the second direction, and can be regarded as vertical directions in a use state. Compared with the mode of connecting the upright post and the hidden cap beam by adopting the support in the related art, the method has the advantages that the transverse deformation zero Z of the hidden cap beam 2 is approximately positioned at the center of the hidden cap beam 2 through experiments, so that the upright post and the main beam are stressed together, the bending moment of the main beam is reduced, and the transverse displacement of the hidden cap beam is controlled. The transverse deformation means that the main beam is deformed in the second direction (transverse direction) when the main beam is contracted and deformed under the influence of temperature, and the transverse deformation zero point Z means 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 hidden cap beam 2 is also related to other factors, for example, by adjusting the length of the hidden cap beam 2 in the second direction (up-down direction shown in fig. 2) to change the position of the transverse deformation zero point Z of the main beam, it can be understood that adjusting the distances between the two upright posts to the middle points of the main beam in the second direction respectively. Of course, the transverse deformation zero Z of the main beam is also related to factors such as the rigidity of the two struts.
As shown in fig. 1, a plurality of movable piers 4 are provided on both sides of the upright in the first direction, and the movable piers are connected with the girder through movable supports. The girder 1 in the embodiment of the present invention is a continuous girder, that is, the girder 1 is provided with three or more piers in the first direction (the left-right direction shown in fig. 1). Pier is a substructure that supports bridge structures and transfers constant and vehicular loads to the foundation. The bridge pier of the middle part of the continuous beam is a middle pier (namely, the upright post 3 in the embodiment of the invention), the upright post 3 in the embodiment of the invention is a fixed pier, the bridge pier close to the middle pier in the continuous beam is a secondary middle pier 41, the bridge pier far away from the middle pier relative to the secondary middle pier 41 in the continuous beam is an edge pier 42, and the secondary middle pier and the edge pier in the embodiment of the invention are movable pier posts 4.
The embodiment of the invention provides a bridge structure, which comprises a main beam, an invisible bent cap, upright posts and movable pier columns, wherein the main beam is arranged in an extending mode along a first direction, the invisible bent cap is fixedly connected with the main beam, the invisible bent cap extends along a second direction to form a cross-shaped structure with the main beam, the first direction is perpendicular to the second direction, the upright posts are in rigid connection, and the movable pier columns are arranged on two sides of the upright posts in the first direction. According to the embodiment of the invention, the mode of rigidly connecting the pair of upright posts and the invisible bent cap is adopted, so that a large support is omitted, and the production cost is reduced; and the upright post and the main beam are stressed together in a consolidation mode, and the bending moment of the main beam is smaller than that of a continuous beam and a simply supported beam with the same span, so that the rigidity of the whole structure of the bridge structure is higher, and the longitudinal and transverse thrust rigidity of the bridge span structure is improved.
In some embodiments, as shown in fig. 1, the movable pier 4 includes a pair of sub-middle piers 41 and a pair of side piers 42, symmetrically disposed with respect to the column 3 in a first direction (left-right direction, longitudinal direction as shown in fig. 1), and a distance L1 from each sub-middle pier 41 to the column 3 in the first direction; the side piers 42 are symmetrically arranged with respect to the upright 3 in the first direction, and the distance from each side pier 42 to the upright 3 in the first direction is L2, wherein L2 is greater than L1. That is, the side pier 42 is disposed on the side of the sub-center pier 41 relatively far from the column 3 in the first direction.
In some embodiments, as shown in fig. 1, the plurality of movable piers 4 are disposed symmetrically with respect to the upright 3 in the first direction (left-right direction shown in fig. 1). That is, in the length direction of the main beam 1, movable piers 4 are provided on both sides at equal distances from the columns 3. 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 provided symmetrically with respect to the column 3 in the first direction, and the two side piers 42 are also provided symmetrically with respect to the column 3 in the first direction. The number of movable piers is not limited in the embodiments of the present invention, and in other embodiments, the number of movable piers may be set according to factors such as the actual construction environment. According to the embodiment of the invention, the movable pier columns are symmetrically arranged relative to the upright 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 piers 4 are correspondingly disposed at the same position of the main beam 1 in the first direction (the left-right direction and the longitudinal direction in fig. 2), and the pair of movable piers 4 are disposed at intervals in the second direction (the up-down direction and the transverse direction in fig. 2). For example, the secondary middle piers 41 in fig. 2 are provided with two, i.e., a first secondary middle pier 41a and a second secondary middle pier 41b, respectively, the first secondary middle piers 41a and the second secondary middle piers 41b being spaced apart in a second direction (up-down direction shown in fig. 2, lateral direction); the side piers 42 are provided with two, a first side pier 42a and a second side pier 42b, respectively, and the first side pier 42a and the second side pier 42b are disposed at intervals in the second direction (up-down direction, lateral direction in fig. 2). The second direction is not limited to a certain straight line direction, but may be a set of parallel line directions, for example, the second direction is a vertical direction and is not limited to a certain straight line direction extending vertically. According to the embodiment of the invention, the pair of movable pier columns are correspondingly arranged at the same position of the main beam in the first direction, and the same pair of movable pier columns are 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 cradle 5 corresponding to each movable pier 4 is a longitudinal cradle 51 movable in a first direction (left-right direction, lateral direction in fig. 2). It should be noted that, in the embodiment of the present invention, the length extension direction of the main beam 1 is defined as a first direction, the first direction is the longitudinal direction of the main beam 1, and correspondingly, a direction perpendicular to the first direction is defined as a second direction, and the second direction is the transverse direction of the main beam 1. The longitudinal movable support 51 is shown as the movable support connecting the movable pier column 4 and the girder 1, and the girder 1 can move in the first direction relative to the movable pier column 4, and the movement in the embodiment of the present invention may be the relative movement generated by the girder under the action of constant load, live load and other loads. The longitudinal movable support 51 in the embodiment of the present invention is also used to indicate that the movement of the main beam 1 and the movable pier 4 in the second direction is limited, that is, the longitudinal movable support 51 limits the vibration of the main beam 1 in the second direction during the vibration of the main beam 1, thereby reducing the displacement of the main beam 1 in the longitudinal direction and improving the stability of the main beam 1 in the longitudinal direction.
In some embodiments, the zero point Z of the lateral deformation of one cradle 5 and hidden cap beam 2 in the second direction is located on the first line a. The movable support is the longitudinal movable support according to the embodiment, at least one of the same pair of movable supports is set as the longitudinal movable support, and the longitudinal movable support of the movable pier columns in the first direction and the transverse deformation zero Z of the invisible bent cap are located on the first straight line A, so that the transverse displacement of the main beam at each movable pier column in the first direction tends to be consistent, and the transverse displacement difference of each movable pier column is reduced.
When the concrete bridge is connected with a roadbed or a steel bridge in transportation of a high-speed railway, the stress and the track irregularity of the ballastless track structure on the bridge can be influenced due to the difference of transverse telescopic displacement at two sides of a girder seam when the temperature of the girder changes. According to the embodiment of the invention, the transverse deformation zero Z of the movable support and the invisible bent cap in the second direction is positioned on the first straight line, so that the transverse deformation coordination and consistency of the main beams at the positions of the movable pier columns are realized, the transverse displacement difference of the main beams at the positions of the movable pier columns is reduced, the smoothness of the 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 cradle of the same pair of movable piers 4 is a multi-directional cradle 52 movable in a first direction (left-right direction in fig. 2, longitudinal) and a second direction (up-down direction in fig. 2, transverse). That is, the girder 1 is provided with a pair of movable piers 4 at the same position in the first direction, one of the movable piers 4 is a longitudinal movable support 51, and the other is a multi-directional movable support 52. The movable pier column 4 and the girder 1 connected with the multi-directional movable support 52 can relatively move in various directions, for example, the position where the girder 1 is connected with the multi-directional movable support 52 can relatively move in a first direction (left-right direction shown in fig. 2, longitudinal direction) and a second direction (up-down direction shown in fig. 2, transverse direction), the deformation of the girder 1 in the longitudinal direction is limited by adopting the longitudinal movable support 51, and the vibration of the girder 1 relative to the movable pier column 4 is absorbed by the multi-directional movable support 52, so that the stability and safety of the bridge are improved.
In some embodiments, as shown in fig. 2, the other cradle corresponding to each movable pier 4 is located on the second straight line B. That is, the multi-directional movable support 52 corresponding to each movable pier column 4 is located on the second straight line B, and the consistency of the deformation of the main beam can be improved by arranging the multi-directional movable support on the same straight line, so that the transverse displacement difference of the main beam at each movable pier column is reduced, the smoothness of the ballastless track structure can be improved, and the safety and the comfort of the operation of the high-speed train are further improved.
In some embodiments, as shown in fig. 2, the first line a is parallel to the second line B. It should be noted that, in the embodiment of the present invention, the first line a and the second line B may be understood as being substantially parallel, and the substantially parallel means that an included angle between the first line a and the second line B is less than or equal to 10 °. According to the embodiment of the invention, the first straight line A is parallel to the second straight line B, so that the coordination of the main beam in all directions is improved, the smoothness of the ballastless track structure is 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 position of at least one column 3 of the pair of columns 3 relative to the hidden cap beam 2 in the second direction (up-down direction, lateral direction as shown in fig. 2) is adjustable. According to the embodiment of the invention, the length of the invisible bent cap 2 in the second direction (up-down direction and transverse direction shown in fig. 2) is adjusted, so that the position of the transverse deformation zero Z of the main beam can be changed, the transverse deformation zero Z of the main beam is closer to the first straight line A, and the stability of the main beam is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. A bridge construction, comprising:
a main beam extending in 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 upright posts are spaced in the second direction and are rigidly connected with the invisible bent cap, extend along a third direction and are perpendicular to the first direction and the second direction;
the movable pier columns are arranged on two sides of the upright posts in the first direction and are connected with the main beams through movable supports; each movable pier column is connected with the main beam through two movable supports, one movable support corresponding to each movable pier column is a longitudinal movable support capable of moving along the first direction, and the other movable support in the same movable pier column is a multi-directional movable support capable of moving along the first direction and the second direction.
2. The bridge construction of claim 1, wherein the main beams are located at the same level as the hidden cap beams.
3. The bridge structure of claim 2, wherein the main beams are provided with a pair of movable piers at the same position in the first direction, and the movable piers of the same pair are provided at intervals in the second direction.
4. A bridge construction according to claim 3, wherein the zero point of transverse deformation of the one cradle and the hidden cap beam in the second direction is located in a first straight line.
5. The bridge construction of claim 4, wherein the other movable abutment for each movable abutment is located on a second straight line.
6. The bridge construction of claim 5, wherein the first line is parallel to the second line.
7. A bridge construction according to claim 3, wherein the position of at least one of the pair of uprights relative to the hidden roof beam in the second direction is adjustable.
8. A bridge construction according to claim 3, wherein the movable pier comprises:
the pair of sub-middle piers are symmetrically arranged relative to the upright post in the first direction, and the distance from each sub-middle pier to the upright post in the first direction is L1;
the pair of side piers are symmetrically arranged relative to the upright posts in the first direction, and the distance from each side pier to the upright posts in the first direction is L2, wherein L2 is larger than L1.
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| CN202111108974.8A CN113863111B (en) | 2021-09-22 | 2021-09-22 | Bridge structure |
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| CN202111108974.8A CN113863111B (en) | 2021-09-22 | 2021-09-22 | Bridge structure |
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