CN111119036A - Bridge bearing - Google Patents
Bridge bearing Download PDFInfo
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- CN111119036A CN111119036A CN202010018232.5A CN202010018232A CN111119036A CN 111119036 A CN111119036 A CN 111119036A CN 202010018232 A CN202010018232 A CN 202010018232A CN 111119036 A CN111119036 A CN 111119036A
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- wedge
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- height
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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
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
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Abstract
The invention discloses a bridge support and relates to the field of bridges. The bridge beam supports include: a carrier. And the wedge assembly is arranged on the bearing piece, wherein the wedge assembly comprises a plurality of wedges which are in contact with each other, and the inclination angle of the wedges is smaller than a preset threshold value. And the cushion block is arranged between the bridge and the wedge assembly. Wherein, the plurality of wedges can slide relatively to each other to adjust the height of the wedge assembly. The height of the bridge can be greatly adjusted, and meanwhile, the adjustment precision of the height of the bridge is guaranteed.
Description
Technical Field
The invention relates to the field of bridges, in particular to a bridge support.
Background
In the use of bridge, under the effect of factors such as geological settlement, the elevation that the height of bridge can deviate from the design needs to adjust the height of bridge through the bridge beam supports.
The method for adjusting the height of the bridge by the related bridge support mainly comprises the following steps: screw height adjustment, hydraulic height adjustment, backing plate height adjustment and wedge height adjustment. The bearing capacity of the screw heightening is limited by the shearing resistance of the screw thread, and the screw heightening cannot bear heavy load; the hydraulic heightening process is complex and the manufacturing cost is high; the precision of the height adjustment of the cushion block is limited by the dimensional precision of the cushion block, and the precise adjustment cannot be realized; the adjusting range of the height adjustment of the wedge block is small, and under the condition that the inclination angle of the wedge block is too large, the wedge block can retreat under the action of the gravity of the bridge, so that the adjusting precision of the height of the bridge is influenced.
Disclosure of Invention
In view of this, an embodiment of the present invention mainly aims to provide a bridge support to solve the technical problem of how to adjust the height of a bridge greatly and ensure the adjustment accuracy of the height of the bridge.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a bridge bearing, which comprises: a carrier; the wedge assembly is arranged on the bearing piece and comprises a plurality of wedges which are in contact with each other, and the inclination angle of each wedge is smaller than a preset threshold value; a pad block disposed between the bridge and the wedge assembly; wherein the wedges are slidable relative to each other to adjust the height of the wedge assembly.
Further, the plurality of wedges comprises: the bottom surface of the first wedge block is arranged on the bearing piece, a first included angle is formed between the top surface of the first wedge block and the bottom surface of the first wedge block, and the first included angle is the inclination angle of the first wedge block; and the bottom surface of the second wedge block is in contact with the top surface of the first wedge block and can slide along the top surface of the first wedge block, a second included angle is formed between the bottom surface of the second wedge block and the top surface of the second wedge block, and the second included angle is the inclination angle of the second wedge block.
Further, the first included angle is equal to the second included angle.
Further, the top surface of the carrier is parallel to the horizontal plane.
Further, a bottom surface of the first wedge slidably contacts or is fixed to a top surface of the carrier
Further, the bridge bearing further comprises: and the wedge driving piece is movably connected with the bearing piece and is used for driving the wedge to move.
Further, the bearing part is provided with a threaded hole; the wedge drive includes a threaded rod having at least a portion thereof disposed in the threaded bore to movably connect the threaded rod with the carriage; in the extending direction of the screw, the first end of the screw is in contact with the wedge.
Further, the wedge drive further comprises: the driving device is connected with the bearing part in a translation manner; the driving device is connected with a second end, opposite to the first end, of the screw rod so as to drive the screw rod to rotate.
Further, the bridge bearing further comprises: and the movable assembly is arranged between the wedge assembly and the cushion block and is used for enabling the bridge and the pier to move relatively within a preset range.
Further, the movable assembly comprises: the bottom surface of the lower support is in contact with the wedge block; the top surface of the upper support is in contact with the cushion block, and the bottom surface of the upper support is movably connected with the top surface of the lower support.
The bridge support provided by the embodiment of the invention comprises a wedge assembly arranged on a bearing piece and a cushion block arranged between the wedge assembly and a bridge, wherein the inclination angle of the wedge block is smaller than a preset threshold value. Through the height dimension who adjusts the cushion, realize adjusting the big stroke low accuracy of bridge height, through the height dimension who adjusts the wedge subassembly, realize adjusting the little stroke high accuracy of bridge height, simultaneously, through making the angle of inclination of voussoir be less than predetermined threshold value, make the voussoir can not take place to roll back under the effect of the gravity of bridge and lead to the high emergence of bridge to change to can guarantee the adjustment accuracy of bridge height when adjusting the bridge height by a wide margin.
Drawings
FIG. 1 is a half-sectional view illustrating an assembly diagram of a bridge, a bridge bearer and a pier according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a bridge support according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating an assembly of a load bearing member and a wedge assembly in a bridge bearer according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a force analysis of a first wedge in a bridge bearing according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a force analysis of a wedge assembly in a bridge bearer according to an embodiment of the present invention;
FIG. 6 is a half-sectional view of another bridge deck according to an embodiment of the present invention;
FIG. 7 is a half-sectional view of an assembly of a load bearing member, a wedge assembly and a wedge driving member in a bridge bearer according to an embodiment of the present invention;
FIG. 8 is a half-sectional view of an alternative embodiment of the present invention showing the assembly of the load bearing member, wedge assembly and wedge driver in a bridge deck;
FIG. 9 is an exploded view of a first type of wedge driver and carrier in a bridge deck according to an embodiment of the present invention;
FIG. 10 is an exploded view of a second type of wedge driver and carrier in a bridge deck according to an embodiment of the present invention;
FIG. 11 is a half-sectional view of another bridge deck according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a movable assembly in a bridge bearing provided by an embodiment of the invention.
Description of the reference numerals
1-bridge support, 2-bridge pier, 3-bridge, 10-bearing piece, 11-first anchor rod, 12-limiting structure, 13-through hole, 14-threaded hole, 20-wedge component, 21-first wedge block, 22-second wedge block, 30-cushion block, 40-separation plate, 41-second anchor rod, 50-wedge block driving piece, 50A-push rod, 50B-screw rod, 51-first driving piece, 52-second driving piece, 60-movable component, 61-lower support, 62-upper support and 63-spherical cap lining plate.
Detailed Description
Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and various possible combinations of the specific features in the present invention will not be further described in order to avoid unnecessary repetition.
In a particular embodiment, the bridge deck is a bridge deck in any beam bridge. As shown in fig. 1, the girder bridge may include a pier 2 and a bridge 3, the pier 2 being fixed to the ground, and the bridge 3 being disposed on the pier 2. The bridge 3 is used for bearing bending moment and transmitting longitudinal load to the bridge pier 2, and the bridge pier 2 is used for bearing longitudinal load and transmitting the longitudinal load to the ground. A bridge support 1 is arranged between the bridge pier 2 and the bridge 3, the height of the bridge support 1 is adjustable, and the height of the bridge 3 can be adjusted by adjusting the height of the bridge support 1. The structure of the bridge deck 1 will be described in detail below.
As shown in fig. 2, the bridge deck 1 includes: the bearing member 10 is fixed to the pier, and specifically, the first anchor rod 11 is arranged at the bottom of the bearing member 10, and the first anchor rod 11 is anchored in the pier, so that the bearing member 10 is fixed to the pier.
A wedge assembly 20 is arranged on the carrier 10, wherein the wedge assembly 20 comprises a plurality of wedges in contact with each other. Specifically, a plurality of wedges are distributed along the height direction of the bridge support 1, that is, along the height direction of the bridge support 1, the bottom surface of one wedge abuts against the top surface of the other wedge, an included angle exists between the bottom surface and the top surface of the wedge, the wedges can slide relatively, and in the process of relative sliding of the wedges, the height dimension of the wedge assembly 20 is continuously changed, so that the height of the bridge can be continuously adjusted, that is, the height of the bridge can be continuously adjusted with high precision by making the wedges in the wedge assembly 20 slide relatively. The inclined angle of the wedge block is smaller than a preset threshold value, wherein an included angle between the bottom surface and the top surface of the wedge block is the inclined angle of the wedge block, specifically, the inclined angle of the wedge block needs to enable each wedge block and the bearing piece to meet a friction self-locking condition, namely, the friction force between contact surfaces of the wedge blocks is not smaller than the component force of the gravity of the bridge in the direction of the contact surfaces of the wedge blocks, so that the wedge block is prevented from returning under the action of the gravity of the bridge, the height of the bridge is prevented from being reduced, and the adjusting precision of the height of the bridge is further. The wedge retraction means a relative movement between wedges which lowers the height of the bridge by the gravity of the bridge.
The cushion block 30 is disposed between the bridge and the wedge assembly 20, and specifically, the cushion block 30 includes a plurality of sub cushion blocks having the same or different sizes, and the height size of the cushion block 30 can be adjusted by adjusting the number and size of the sub cushion blocks, thereby realizing a large-stroke adjustment of the height of the bridge. Optionally, the pad 30 directly contacts the wedge assembly 20, that is, the bottom surface of the pad 30 abuts against the top surface of the wedge assembly 20, so that the bridge support 1 has a compact structure and the height of the bridge support 1 is reduced. Optionally, as shown in fig. 2, a separation plate 40 is disposed between the wedge assembly 20 and the pad block 30 to increase a contact area between the pad block 30 and the wedge assembly 20, so as to reduce a positive stress applied to the wedge assembly 20 by the pad block 30 and prolong a service life of the pad block 30. Optionally, the separation plate 40 is further provided with a second anchor 41, and the second anchor 41 passes through the cushion block 30 and is inserted into the bridge, so as to connect the bridge bearing 1 with the bridge, and at the same time, the second anchor 41 can limit the relative movement between the cushion block 30 and the separation plate 40 in the horizontal direction. Optionally, a limiting structure 12 is disposed on the bearing member 10, and the limiting structure 12 is disposed on two sides of the cushion block 30 in a transverse direction to limit the movement of the cushion block 30 in the horizontal direction, wherein the transverse direction is perpendicular to the height direction of the bridge bearing 1. By arranging the limiting structure 12, in the process of relative sliding of the wedge blocks, the cushion block 30 can only move along the high-size direction of the bridge bearing, and cannot move in the horizontal direction under the action of the friction force between the cushion block 30 and the wedge blocks.
The method for adjusting the height of the bridge using the bridge deck will be described in detail below. Firstly, a bridge is moved from a bridge support 1 to a temporary support through a beam moving device, wherein the beam moving device can be a jack, for example; then, the height size of the cushion block 30 is adjusted according to the difference between the actual height and the target height of the bridge, so that the difference between the actual height and the target height of the bridge is smaller than a difference threshold, wherein the difference threshold can be 10 millimeters, for example, namely, the height of the bridge is adjusted with a large stroke and low precision by adjusting the height size of the cushion block 30; after the difference between the actual height of the beam and the target height is smaller than the difference threshold, relative sliding occurs between the wedges in the wedge assembly 20 to continuously change the height dimension of the wedge assembly 20 until the actual height of the bridge is equal to the target height, i.e., the height of the bridge is adjusted with small stroke and high precision by sliding the wedges; after the actual height of the bridge is equal to the target height, the bridge is moved from the temporary support to the bridge support 1 by the beam moving device.
In the above process of adjusting the height of the bridge, the actual height of the bridge refers to the height of the top surface of the pad block 30, and after the height of the top surface of the pad block 30 is adjusted to the target height, the bridge is moved from the temporary support to the bridge support 1 by the beam moving device, at this time, the bottom surface of the bridge abuts against the top surface of the pad block 30, and the height of the top surface of the pad block 30 is made to be the same as the target height, so that the height of the bottom surface of the bridge is ensured to be the same as the target height after the bridge is moved from the temporary support to the bridge support 1. Optionally, for the condition that the height of the top surface of the bridge needs to be the same as the target height, the difference between the top surface of the cushion block 30 and the target height is equal to the distance between the bottom surface and the top surface of the bridge, so as to ensure that the height of the top surface of the bridge is the same as the target height after the bridge is moved from the temporary support to the bridge support 1.
The bridge support provided by the embodiment of the invention comprises a wedge assembly arranged on a bearing piece and a cushion block arranged between the wedge assembly and a bridge, wherein the inclination angle of the wedge block is smaller than a preset threshold value. Through the height dimension who adjusts the cushion, realize adjusting the big stroke low accuracy of bridge height, through the height dimension who adjusts the wedge subassembly, realize adjusting the little stroke high accuracy of bridge height, simultaneously, through making the angle of inclination of voussoir be less than predetermined threshold value, make the voussoir can not take place to roll back under the effect of the gravity of bridge and lead to the high emergence of bridge to change to when can adjusting the bridge height by a wide margin, guarantee the adjustment accuracy of bridge height.
In some embodiments, as shown in fig. 3, the plurality of wedges in wedge assembly 20 include: a first wedge 21 and a second wedge 22. The bottom surface of first voussoir 21 sets up on bearing the piece, is first contained angle between the top surface of first voussoir 21 and the bottom surface of first voussoir, and first contained angle is the angle of inclination of first voussoir 21. The bottom surface of the second wedge 22 contacts the top surface of the first wedge 21, and a second included angle is formed between the bottom surface of the second wedge 22 and the top surface of the second wedge 22, and the second included angle is the inclination angle of the second wedge 22. It should be noted that the top and bottom surfaces are defined as the top and bottom surfaces of the corresponding component under normal operating conditions. The second wedge 22 is slidable along the top surface of the first wedge 21. Alternatively, the number of the second wedges 22 may be one or more, wherein, in the case of a plurality of second wedges 22, the bottom surface of one second wedge 22 abuts against and slides along the top surface of another second wedge 22, the larger the number of the second wedges 22 is, the larger the adjustment stroke of the wedge assembly 20 is, considering that the large stroke adjustment of the bridge height is already achieved through the spacer 30, and the larger the number of the second wedges 22 is, the larger the height of the bridge deck 1 is, and the more complicated the adjustment of the bridge height is, the following description will be made with the number of the second wedges 22 being one.
In some embodiments, the first angle is equal to the second angle, i.e. the angle between the bottom surface and the top surface of the first wedge 21 is equal to the angle between the bottom surface and the top surface of the second wedge 22, and by making the first angle equal to the second angle, the calculation of the predetermined threshold value of the inclination angle can be simplified. Meanwhile, in a state where the first included angle is equal to the second included angle, the top surface of the second wedge 22 is parallel to the bottom surface of the first wedge 21, and the bottom surface of the first wedge 21 abuts against the top surface of the load bearing member 10, that is, in a state where the first included angle is equal to the second included angle, the top surface of the second wedge 22 is parallel to the top surface of the load bearing member 10.
Further, the top surface of the carrier 10 is parallel to the horizontal plane, wherein horizontal plane refers to the plane of the completely stationary water formation, or a plane parallel to this plane. In a state where the first included angle is equal to the second included angle, the top surface of the second wedge 22 is parallel to the top surface of the carrier 10, that is, the top surface of the second wedge 22 is parallel to the horizontal plane, thereby preventing the weight of the pad 30 and the bridge from generating a lateral component force on the top surface of the second wedge 22 and a lateral component force on the top surface of the carrier 10, and further enabling the wedge assembly 20 to more firmly support the pad 30 and the bridge, and enabling the carrier 10 to more firmly support the wedge assembly 20, the pad 30 and the bridge.
In some embodiments, the bottom surface of the first wedge 21 is in slidable contact with the top surface of the carrier 10, i.e., the first wedge 21 is slidable along the top surface of the carrier 10, and the second wedge 22 is slidable along the top surface of the first wedge 21, and the first wedge 21 and the second wedge 22 are moved toward each other or away from each other simultaneously by applying an external force to the first wedge 21 and the second wedge 22 simultaneously, thereby increasing the speed of adjusting the bridge height by the wedge assembly 20.
In some embodiments, the bottom surface of the first wedge 21 is fixed to the top surface of the carrier 10, i.e., the first wedge 21 is fixed to the top surface of the carrier 10, and the second wedge 22 is slidable along the top surface of the first wedge 21 by applying an external force to the second wedge 22. Under the state that the first wedge 21 and the bearing part 10 are fixed, only external force needs to be applied to the second wedge 22, so that the second wedge 22 and the first wedge 21 can be driven to move relatively, the external force does not need to be applied to the first wedge 21, the first wedge 21 and the second wedge 22 do not move together, and the external force needed for driving the first wedge 21 and the second wedge 22 to move relatively is saved.
In some embodiments, the second included angle is smaller than a preset threshold value, so as to prevent the first wedge 21 and the second wedge 22 from retracting under the gravity of the bridge, that is, prevent the first wedge 21 and the second wedge 22 from retracting under the gravity of the bridge, thereby ensuring the adjustment accuracy of the height of the bridge.
Alternatively, the bottom surface of the first wedge 21 is slidably contacted with the top surface of the carrier 10, and in order to prevent relative movement between the first wedge 21 and the second wedge 22, it is necessary to ensure that the frictional self-locking condition between the first wedge 21 and the second wedge 22 is satisfied, and specifically, by making the inclination angle of the second wedge 22 smaller than a predetermined first threshold value, so that the component of the gravity of the bridge along the top surface of the second wedge 22 is always smaller than the frictional force applied by the first wedge 21 to the second wedge 22, and the component of the force applied by the second wedge 22 to the first wedge 21 along the top surface of the carrier 10 is always smaller than the frictional force applied by the top surface of the carrier 10 to the first wedge 21.
Alternatively, the bottom surface of the first wedge 21 is fixed to the top surface of the carrier 10, and if no relative motion occurs between the first wedge 21 and the second wedge 22, it is only necessary to ensure that the friction self-locking condition between the first wedge 21 and the second wedge 22 is satisfied, and specifically, by making the inclination angle of the second wedge 22 smaller than a preset second threshold value, the component force of the gravity of the bridge along the top surface of the second wedge 22 is always smaller than the friction force applied by the first wedge 21 to the second wedge 22.
In a state where the first included angle is equal to the second included angle and the top surfaces of the second wedge 22 and the carrier 10 are both parallel to the horizontal plane, the first threshold value is equal to the second threshold value, and a specific analysis process is given below. It should be noted that the gravity of the bridge is much greater than the gravity of the first wedge 21 and the second wedge 22, the influence of the gravity of the first wedge 21 and the second wedge 22 on the calculation of the first threshold and the second threshold is negligible, and the gravity of the first wedge 21 and the second wedge 22 is ignored in the following analysis process in order to simplify the analysis process.
The second wedge 22 is first subjected to a force analysis by means of an isolation method, as shown in fig. 4, acting onThe forces of the second wedge 22 include: the positive pressure G applied by the bridge to the second wedge 22 and the supporting force N applied by the first wedge 21 to the second wedge 221And the friction force f exerted by the first wedge 21 on the second wedge 221. Here, the bridge is supported by a plurality of bridge piers, bridge bearers 1 are provided between the bridge piers and the bridge, the bridge bearers bear the weight of the bridge in common, the magnitude of the positive pressure G applied to the second wedge 22 by the bridge is the weight of the bridge divided by the number of the bridge bearers 1, for convenience of description, the positive pressure G applied to the second wedge 22 by the bridge is referred to as a first positive pressure G, a direction parallel to the bottom surface of the second wedge 22 is referred to as a lateral direction, and a direction perpendicular to the bottom surface of the second wedge 22 is referred to as a longitudinal direction. Orthogonally decomposing the first positive pressure G along the transverse direction and the longitudinal direction to obtain a transverse component force G of the first positive pressurexAnd a longitudinal component G of the first positive pressureyWherein, in the step (A),
Gx＝Gsinθ2(1)
Gy＝Gcosθ2(2)
in the formulae (1) and (2), θ2Is the angle of inclination of the second wedge 22, i.e., the second included angle.
In the longitudinal direction, the second wedge 22 remains relatively stationary with respect to the first wedge 21, so N1＝Gcosθ2(ii) a If it is necessary to prevent the second wedge 22 from moving relative to the first wedge 21 under the action of the gravity of the bridge, that is, the friction self-locking condition between the second wedge 22 and the first wedge 21 is satisfied, it is necessary to ensure the maximum static friction force f applied by the first wedge 21 to the second wedge 221maxTransverse component G not less than first positive pressurex. Specifically, the maximum static friction force f exerted by the first wedge 21 on the second wedge 221maxAnd a transverse component G of the first positive pressurexThe following conditions need to be satisfied:
f1max≥Gx(3)
maximum static friction force f1maxApproximating the dynamic friction between the first wedge 21 and the second wedge 22, we obtain:
f1max＝μ1N1＝μ1Gcosθ2(4)
in the formula, mu1In the case where equations (1) and (4) are taken into equation (3) to obtain the coefficient of friction between the first wedge 21 and the second wedge 22, the following are:
μ1Gcosθ2≥Gsinθ2(5)
both ends of formula (5) are simultaneously divided by Gcos theta2A friction self-locking condition between the second wedge 22 and the first wedge 21 is obtained:
θ2≤arctanμ1(6)
on the premise that the inclination angle of the second wedge 22 satisfies formula (6), no relative movement occurs between the first wedge 21 and the second wedge 22, the first wedge 21 and the second wedge 22 may be regarded as a whole, and the wedge assembly 20 including the first wedge 21 and the second wedge 22 as a whole is subjected to a stress analysis, as shown in fig. 5, in a state where the first included angle is equal to the second included angle and the top surface of the second wedge 22 and the top surface of the carrier 10 are both parallel to a horizontal plane, a component force of the first positive pressure G in the direction of the top surface of the carrier 10 is zero, that is, the first wedge 21 does not slide along the top surface of the carrier 10 under the gravity of the bridge either in a state where the first wedge 21 is in slidable contact with the top surface of the carrier 10 or in a state where the first wedge 21 is fixed to the top surface of the carrier 10.
In summary, in both cases where the bottom surface of the first wedge 21 is slidably in contact with the top surface of the carrier 10 and where the bottom surface of the first wedge 21 is fixed to the top surface of the carrier 10, it is only necessary for the inclination angle of the second wedge 22 to satisfy the formula (6) to ensure that no relative movement occurs between the first wedge 21 and the second wedge 22, and at the same time, to ensure that the first wedge 21 does not slide along the top surface of the carrier 10, i.e., the first threshold value is equal to the second threshold value, and both the first threshold value and the second threshold value are arctan μ ″1。
In some embodiments, as shown in fig. 6, the bridge deck 1 further comprises a wedge drive 50. The wedge drive 50 is movably connected to the carrier 10 for driving the wedge to move, and in particular, during the movement of the wedge drive 50 relative to the carrier 10, the wedge drive 50 drives the wedges of the wedge assembly 20 to move relative to each other, thereby adjusting the height of the bridge. Alternatively, as shown in fig. 7, the first wedge 21 is slidably in contact with the top surface of the carriage 10, the wedge drive 50 comprises a first drive 51 and a second drive 52, the first drive 51 is movably connected to the carriage 10, and the first drive 51 is in contact with the second wedge; the second drive member 52 is movably connected to the carrier 10, and the second drive member 52 is in contact with or connected to the first wedge. During the movement of the first and second drivers 51, 52 relative to the carrier 10, a relative movement between the first and second wedges 21, 22 is simultaneously driven, thereby adjusting the height of the bridge. Alternatively, as shown in fig. 8, the bottom surface of the first wedge 21 is fixed to the top surface of the carrier 10, the wedge driving member 50 includes a first driving member 51, the first driving member 51 is movably connected to the carrier 10, and the first driving member 51 is in contact with the second wedge. The first driver 51 drives the second wedge 22 to slide along the top surface of the first wedge 21, thereby adjusting the height of the bridge.
The wedge drive 50 is any element that can drive relative movement of the wedges in the wedge assembly, and the construction of the wedge drive 50 is described below with reference to fig. 9 and 10, respectively, and it will be understood by those skilled in the art that the wedge drive 50 can be other than the two constructions described below.
As shown in fig. 9, the first type of wedge drive is a push rod 50A, the carrier 10 is provided with a through hole 13, and the push rod 50A passes through the through hole 13 to slidably connect the push rod 50A with the carrier 10. The push rod 50A can slide along the length direction of the through hole 13, and one end of the push rod 50A abuts against the wedge blocks in the wedge assembly 20 along the length direction of the through hole 13, so as to push the wedge blocks in the wedge assembly 20 to move relatively, thereby adjusting the height of the bridge.
As shown in fig. 10, the second type of wedge drive comprises a screw 50B, the carrier 10 is provided with a threaded bore 14, and the internal thread of the threaded bore 14 matches the external thread of the screw 50B. At least a portion of the threaded rod 50B is positioned in the threaded aperture 14, i.e., the threaded rod 50B is threaded into the threaded aperture 14, thereby movably connecting the threaded rod 50B to the carrier 10. Rotating the screw 50B drives the screw 50B to move linearly along the length of the threaded hole 14, and the first end of the screw 50B contacts the wedge in the length of the threaded hole 14, and the wedge in the wedge assembly 20 is driven to move relatively by rotating the screw 50B, so as to adjust the height of the bridge.
The relationship between the rotation angle of the screw 50B and the stroke of the linear motion of the screw 50B can be obtained according to the pitch of the external thread of the screw 50B, and the relationship between the stroke of the linear motion of the screw 50B and the variation of the height of the bridge can be obtained according to the inclination angle of the wedge in the wedge assembly 20. Specifically, the relationship between the rotation angle of the screw 50B and the linear movement stroke of the screw 50B is:
in the formula (7), x is a stroke of the linear motion of the screw 50B, α is a rotation angle of the screw 50B, and d is a pitch of the external thread of the screw 50B.
The relationship between the stroke of the linear movement of the screw 50B and the amount of change in the height of the bridge is:
Δh＝xtanθ (8)
in equation (8), Δ h is the amount of change in bridge height, x is the stroke of linear movement of the screw 50B, and θ is the inclination angle of the wedge in contact with the screw 50B, and the relationship between the rotation angle of the screw 50B and the amount of change in bridge height can be obtained by taking equation (8) into equation (7):
according to the formula (9), the variable quantity of the height of the bridge can be accurately adjusted by controlling the rotation angle of the screw rod 50B, so that the adjustment accuracy of the height of the bridge is further improved.
Optionally, the second type of wedge driving member further includes a driving device, the driving device is connected with the bearing member 10 in a translational manner, and the driving device is connected with a second end, opposite to the first end, of the screw 50B, so as to drive the screw 50B to rotate, thereby realizing adjustment of the height of the bridge. Optionally, the driving device is a stepping motor, and the stepping motor can accurately adjust the rotation angle of the screw 50B according to formula (9), so that the adjustment accuracy of the height of the bridge is further improved.
In some embodiments, as shown in fig. 11, the bridge deck 1 further comprises a movable assembly 60. The movable assembly 60 is disposed between the pad 30 and the wedge assembly 20 for enabling relative movement between the bridge and the pier within a predetermined range. Under the effect that receives external load or external temperature variation, relative motion's trend may produce between bridge and the pier, if directly fix bridge and pier through bridge beam supports, can produce the internal stress in bridge, bridge beam supports and pier, lead to the life of bridge, bridge supports and pier to shorten, through set up movable assembly 60 between cushion 30 and wedge subassembly 20, allow to take place relative motion between bridge and the pier in the within range of predetermineeing, thereby release above-mentioned internal stress through the relative motion between bridge and the pier, and then prolong the life of bridge, bridge beam supports and pier.
Optionally, the movable assembly is a damping element, relative motion between the bridge and the pier can be achieved within a preset range through deformation of the damping element, and meanwhile, kinetic energy of the bridge is converted into internal energy of the damping element through friction between molecules of the damping element.
Alternatively, as shown in fig. 12, the movable assembly 60 includes: a lower seat 61 and an upper seat 62. The bottom surface of lower seat 61 contacts the wedge in wedge assembly 20, the top surface of upper seat 62 contacts pad 30, and the bottom surface of upper seat 62 is movably connected to the top surface of lower seat 61. Optionally, the upper support 62 slidably abuts against the top surface of the lower support 61, so that the upper support 62 can slide along the top surface of the lower support 61, and the bridge can move linearly within a preset range with respect to the bridge pier. Optionally, as shown in fig. 12, a spherical cap liner 63 is provided between the lower support 61 and the upper support 62. Specifically, the bottom surface of the spherical cap lining plate 63 is a spherical curved surface, the top surface of the spherical cap lining plate 63 is a plane, the top surface of the lower support 61 is provided with a spherical groove matched with the bottom surface of the spherical cap lining plate 63, the bottom surface of the spherical cap lining plate 63 abuts against the arc-shaped curved surface of the spherical groove, and the upper support 62 abuts against the top surface of the spherical cap lining plate 63. The bottom surface of the spherical cap lining plate 63 can slide along the arc-shaped curved surface of the spherical groove, so that the upper support 62 and the lower support 61 can deflect relatively, and further the bridge can deflect relatively with the pier.
Optionally, a spherical sliding plate is arranged between the circular arc-shaped curved surface of the spherical groove and the bottom surface of the spherical cap lining plate 63 to reduce the friction force between the circular arc-shaped curved surface of the spherical groove and the bottom surface of the spherical cap lining plate 63, and the spherical sliding plate is a spherical teflon sliding plate and is made of teflon.
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 (10)
1. A bridge support for supporting a bridge, comprising:
a carrier;
the wedge assembly is arranged on the bearing piece and comprises a plurality of wedges which are in contact with each other, and the inclination angle of each wedge is smaller than a preset threshold value;
a pad block disposed between the bridge and the wedge assembly;
wherein the wedges are slidable relative to each other to adjust the height of the wedge assembly.
2. The bridge deck according to claim 1, wherein the plurality of wedges comprises:
the bottom surface of the first wedge block is arranged on the bearing piece, a first included angle is formed between the top surface of the first wedge block and the bottom surface of the first wedge block, and the first included angle is the inclination angle of the first wedge block;
and the bottom surface of the second wedge block is in contact with the top surface of the first wedge block and can slide along the top surface of the first wedge block, a second included angle is formed between the bottom surface of the second wedge block and the top surface of the second wedge block, and the second included angle is the inclination angle of the second wedge block.
3. The bridge bearer according to claim 2, wherein the first included angle is equal to the second included angle.
4. The bridge deck according to claim 3, wherein the top surface of the load bearing member is parallel to the horizontal plane.
5. The bridge support according to claim 4, wherein a bottom surface of the first wedge is in slidable contact with or fixed to a top surface of the carrier.
6. The bridge deck according to claim 1, further comprising:
and the wedge driving piece is movably connected with the bearing piece and is used for driving the wedge to move.
7. The bridge support according to claim 6, wherein the carrier is provided with a threaded hole;
the wedge drive includes a threaded rod having at least a portion thereof disposed in the threaded bore to movably connect the threaded rod with the carriage;
in the extending direction of the screw, the first end of the screw is in contact with the wedge.
8. The bridge deck according to claim 7, wherein said wedge drive further comprises: the driving device is connected with the bearing part in a translation manner;
the driving device is connected with a second end, opposite to the first end, of the screw rod so as to drive the screw rod to rotate.
9. The bridge deck according to claim 1, further comprising:
and the movable assembly is arranged between the wedge assembly and the cushion block.
10. The bridge deck according to claim 9, wherein said movable assembly comprises:
the bottom surface of the lower support is in contact with the wedge block;
the top surface of the upper support is in contact with the cushion block, and the bottom surface of the upper support is movably connected with the top surface of the lower support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018232.5A CN111119036A (en) | 2020-01-08 | 2020-01-08 | Bridge bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010018232.5A CN111119036A (en) | 2020-01-08 | 2020-01-08 | Bridge bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111119036A true CN111119036A (en) | 2020-05-08 |
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ID=70487503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010018232.5A Pending CN111119036A (en) | 2020-01-08 | 2020-01-08 | Bridge bearing |
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| Country | Link |
|---|---|
| CN (1) | CN111119036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818336A (en) * | 2021-09-03 | 2021-12-21 | 上海路博减振科技股份有限公司 | Method for adjusting position of support node |
-
2020
- 2020-01-08 CN CN202010018232.5A patent/CN111119036A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818336A (en) * | 2021-09-03 | 2021-12-21 | 上海路博减振科技股份有限公司 | Method for adjusting position of support node |
| CN113818336B (en) * | 2021-09-03 | 2023-02-24 | 上海路博减振科技股份有限公司 | Method for adjusting position of support node |
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