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CN-117488663-B - Vase pier bridge structure

CN117488663BCN 117488663 BCN117488663 BCN 117488663BCN-117488663-B

Abstract

The invention relates to the technical field of bridges, and particularly discloses a vase pier bridge structure which comprises a cross beam, a vase pier body, oblique supports arranged between the cross beam and the vase pier body, wherein the oblique supports are symmetrically arranged at two ends of the upper edge of the vase pier body along the transverse direction of the bridge, an included angle formed by the axis of the oblique supports and the axis of the vase pier body is theta, and a stop block mechanism playing a limiting role in the transverse direction of the bridge is further arranged on the vase pier body, wherein theta is less than or equal to 25 degrees. The invention uses the oblique support to change the direction of the vertical force of the support, thereby greatly improving the stress state of the vase pier, eliminating the pull rod reinforcing steel bars and the oblique steel bars at the top edge of the pier, optimizing the thickness of the pier, optimizing the number of the stop block mechanisms, and simultaneously, the stop block mechanisms not only play a role in preventing the girder from falling under the earthquake action, but also completely replace the function of the transverse limit support under the normal use state, thereby eliminating the transverse limit support of the full bridge and reducing the engineering cost and the construction difficulty.

Inventors

  • RAO HAOMIAO
  • XU YING
  • LIU CHUNZHENG
  • ZHENG YUAN
  • ZENG BEN
  • SUN QUANLI
  • WANG SHIHAO
  • HUANG JINGFENG

Assignees

  • 广州市城市规划勘测设计研究院有限公司

Dates

Publication Date
20260512
Application Date
20231212

Claims (9)

  1. 1. The utility model provides a vase mound bridge construction, includes crossbeam (10) and vase mound body (20), its characterized in that: The vase pier comprises a cross beam (10) and a vase pier body (20), and is characterized by further comprising an inclined support (30) arranged between the cross beam (10) and the vase pier body (20), wherein the inclined support (30) is symmetrically arranged at two ends of the upper edge of the vase pier body (20) along the transverse bridge direction, and an included angle formed by the axis of the inclined support (30) and the axis of the vase pier body (20) is theta; Wherein θ is less than or equal to 25 °; The vase pier body (20) comprises a straight line section (21) and an arc section (22), the inclined support (30) is arranged at the upper edge of the arc section (22), and an included angle formed by the axis of the inclined support (30) and the axis of the vase pier body (20) is theta, so that the following formula is satisfied: (1) in the formula (1), H represents the height of the arc section (22), b represents the width of the straight line section (21), and s represents the distance between the center points of the two inclined supports (30).
  2. 2. The bridge structure of a vase pier according to claim 1, characterized in that the middle part of the arc section (22) is provided with a hollowed-out area (24) so that the arc section (22) forms two supporting legs (23), the oblique support (30) is arranged at the upper edges of the supporting legs (23), and the stop block mechanism is arranged in the hollowed-out area (24).
  3. 3. The bridge structure of a vase pier according to claim 2, characterized in that the stop block mechanism comprises a connecting plate (25) arranged in the hollowed-out area (24), a limit groove (26) is formed in the upper edge of the connecting plate (25) along the longitudinal bridge direction, the stop block mechanism further comprises a stop block (11) arranged in the middle of the lower edge of the cross beam (10), one end of the stop block (11) extends into the limit groove (26), and a gap exists between the lower edge of the stop block (11) and the connecting plate (25), so that the stop block (11) can move relatively in the longitudinal bridge direction and the vertical direction.
  4. 4. A vase pier bridge construction according to claim 3, characterized in that the stop (11) extends into the limit groove (26) to a depth of not less than 20cm.
  5. 5. A vase pier bridge construction according to claim 3, characterized in that the stop blocks (11) are provided with rubber strips (27) along the lateral sides of the bridge.
  6. 6. A vase pier bridge construction according to claim 3, characterized in that the thickness of the contact plate (25) is not less than 30cm, and the thickness of the contact plate (25) is not less than 0.2 times the thickness of the vase pier body (20), the height and width of the contact plate (25) being less than the width b of the straight section (21).
  7. 7. The vase pier bridge structure according to claim 1, characterized in that the width of the cross beam (10) in the transverse bridge direction is less than or equal to 16m, the distance s between the central points of the two inclined supports (30) is less than or equal to 6m, the height H of the circular arc section (22) is less than or equal to 5m, and the width b of the straight line section (21) is more than or equal to 2.5m.
  8. 8. A vase pier bridge construction according to claim 1, characterized in that the lower edge of the cross member (10) is provided with tension bars (12) in the transverse direction.
  9. 9. A vase pier bridge construction according to claim 1, characterized in that both of the oblique supports (30) are basin-type movable supports in their oblique direction.

Description

Vase pier bridge structure Technical Field The invention relates to the technical field of bridges, in particular to a vase pier bridge structure. Background At present, a plurality of pier-beam connection modes exist in a continuous bridge, more common is that supports are arranged between pier beams, the pier has a plurality of construction modes, wherein the vase pier is in a common pier shape, and the vase pier 2' is fixed Yu Cheng and 4', as shown in fig. 1 and 2, the main characteristic of the conventional continuous bridge is that the plane of the support 3' is basically parallel to the vase pier 2' and the cross beam 1 '. One of the two supports 3' on the pier top is a limiting support along the transverse bridge direction, and the other is a movable support, wherein the limiting support mainly transmits transverse force between the transverse beam 1' and the vase pier 2 '. As shown in fig. 2, the support 3' sequentially includes a support pad 31' from bottom to top, a support body 32' and a beam bottom leveling block 33', a beam falling preventing stop 5' is generally disposed at the inner side of the support 3', a certain gap is reserved between the beam falling preventing stop 5' and the support pad 31', under the action of an earthquake, after the transverse limiting support is sheared by the earthquake force, the cross beam 1' has the possibility of moving a beam falling by a transverse bridge, and the beam falling preventing stop 5' and the support pad 31' can be prevented from being blocked. However, the continuous bridge described above still has the following drawbacks: 1. The existing vase pier is basically in a ' pull-compression bar ' mode when being stressed in the transverse bridge direction, the transverse beam 1' is mainly stressed by the upper edge, the lower edge is mainly stressed, the stressed mode of the vase pier 2' is shown in fig. 3, a larger pulling force exists at the upper edge of the pier, due to the fact that the compressive strength of concrete is high and the tensile strength is lower, multiple layers of transverse-bridge-direction pull rod steel bars 221' are needed to be arranged at the pier top to bear the pulling force, in addition, the tensile capacity of the pier top is guaranteed, the shearing bearing capacity of concrete below a support is also needed to be guaranteed, more diagonal bars 222' are needed to be arranged to guarantee the shearing bearing capacity of the concrete below the support, as shown in fig. 4 and 5, the concrete is difficult to vibrate due to the fact that the steel bars at the pier top are dense, the construction difficulty is greatly increased, the construction efficiency is affected, in addition, when the vertical force of the support 3' is large, the shearing area of the concrete below the support is possibly insufficient, the pier thickness is needed to be increased, the consumption of the building material is further increased, and the engineering investment is increased. Wherein the tension fs=fd of the pull rod reinforcement 221' (Fd represents the vertical force of the support, θ represents the included angle formed by the vertical force of the support and the concrete compression bar of the vase pier 2 '), and the larger the vertical force of the support and the value of θ, the more unfavorable the stress on the vase pier 2'; 2. The pier top of the vase pier 2' is generally provided with only one limiting support along the transverse bridge, the cost of the limiting support is higher than that of the movable support under the condition of the same bearing capacity, the common support is easily sheared under the action of high intensity earthquake, and a special anti-seismic support can be arranged, but the anti-seismic support is more complex in process and more expensive. Disclosure of Invention The invention aims to solve the technical problems of difficult construction and high manufacturing cost of the existing vase pier. In order to solve the technical problems, the invention provides a vase pier bridge structure, which comprises a cross beam and a vase pier body; The vase pier comprises a transverse beam, a vase pier body, an oblique support, a stop block mechanism, a limiting mechanism and a positioning mechanism, wherein the transverse beam is arranged on the vase pier body; Wherein θ is less than or equal to 25 °. Still preferably, the vase pier body comprises a straight line section and an arc section, the oblique support is arranged at the upper edge of the arc section, and an included angle formed by the axis of the oblique support and the axis of the vase pier body is theta, which meets the following formula: θ=arctan{0.45(2s―b)/H} (1) in the formula (1), H represents the height of the arc section, b represents the width of the straight line section, and s represents the distance between the center points of the two inclined supports. Further preferably, a hollowed-out area is formed in the middle of the arc section,