Prestressed construction column structure and construction method suitable for reinforcing stone arch bridge pier body

Abstract

The application provides a prestressed construction column structure suitable for reinforcing a stone arch bridge pier body, comprising a plurality of reinforced concrete construction columns arranged in the interior of the pier body, each direction construction column is connected into a whole through a corbel structure and a tie beam structure, and prestressed beam structures are arranged in the interior of each construction column; the prestressed beam structures extend upward to the top of the corbel structure and extend downward to the bearing platform, thereby applying prestress to the construction column; a longitudinal reinforced concrete corbel connects the construction columns into a whole along the longitudinal direction of the bridge, and the both ends thereof form cantilevers; a transverse reinforced concrete corbel connects the construction columns into a whole along the transverse direction of the bridge, and the both ends thereof are flush with the edges of the construction columns. The prestressed construction column structure can reinforce the stone arch bridge pier body, improve the shearing strength of the pier body, avoid the adverse effect of the strong horizontal force formed by water flow on the root of the pier body under the action of water flow, enhance the integrity of the stone arch bridge, and improve the bearing capacity of the stone arch bridge.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge engineering, and particularly relates to a prestressed construction column structure and a construction method suitable for reinforcing a pier body of a stone arch bridge. BACKGROUND

[0002] In the early development of bridge engineering, stone arch bridges with various characteristics were generally used. Although the stone arch bridges have advantages such as convenient material selection, simple construction and long service life, the original design cannot meet today's technical standards due to the limitations of the construction technology and economy at that time, and especially after decades of operation, various problems and safety hazards are prone to occur. Common problems mainly include arch ring cracks, insufficient pier body stress, foundation deformation and the like. As one of the main stress structures of the stone arch bridge, the mechanical properties of the pier body are related to the safety performance of the entire stone arch bridge, and especially under the action of adverse loads such as large floods, the horizontal force on the pier body is large, and the shear strength of the pier body is difficult to meet the structural design requirements, and there is a large safety hazard. Therefore, it is necessary to take pier body reinforcement measures to improve the bearing capacity of the pier body and ensure the safety of the entire stone arch bridge structure. SUMMARY

[0003] In view of this, the present application aims to overcome the defects in the prior art and provide a prestressed construction column structure and a construction method suitable for reinforcing a pier body of a stone arch bridge.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A prestressed construction column structure suitable for reinforcing a pier body of a stone arch bridge, comprising a plurality of steel reinforced concrete construction columns arranged symmetrically along the transverse bridge direction and the longitudinal bridge direction inside the pier body, the construction columns in each direction are connected into a whole through a crown beam structure and a tie beam structure, and a prestressed beam structure is arranged inside each construction column; the prestressed beam structure extends upward to the top of the crown beam structure and extends downward to the pile cap, thereby applying prestress to the construction column; the crown beam structure comprises a longitudinal steel reinforced concrete crown beam and a transverse steel reinforced concrete crown beam arranged at the top of the construction column, and the tie beam structure comprises a longitudinal steel reinforced concrete tie beam and a transverse steel reinforced concrete tie beam arranged at the middle of the construction column; the longitudinal steel reinforced concrete crown beam connects the construction columns into a whole along the longitudinal bridge direction, and forms cantilevers at both ends thereof; the transverse steel reinforced concrete crown beam connects the construction columns into a whole along the transverse bridge direction, and the both ends thereof are flush with the edges of the construction columns; the cross-sectional width of the longitudinal and transverse steel reinforced concrete crown beams is the same as the cross-sectional width of the construction column; the prestressed beam structure comprises a steel strand prestressed beam penetrating through the construction column, the steel strand prestressed beam extends upward to the top of the crown beam, and a prestressed tensioning device is arranged at the top of the crown beam structure, the steel strand prestressed beam extends downward to the inside of the pile cap, and a prestressed beam anchoring device is arranged inside the pile cap.

[0006] Further, the cross-sectional shape of the construction column includes, but is not limited to, a square, a rectangle or a circle.

[0007] Further, the longitudinal steel reinforced concrete tie beams connect the construction columns in pairs along the longitudinal direction.

[0008] Further, the construction columns are symmetrically provided with at least two rows along the longitudinal direction.

[0009] Further, the construction columns are provided with a steel strand prestressed beam pipe hole in the center, and the steel strand prestressed beam is arranged through the center of the construction column.

[0010] A construction method of a prestressed construction column structure suitable for reinforcing a stone arch bridge pier is provided below, including the following steps:

[0011] A plurality of steel reinforced concrete construction columns are symmetrically constructed in the pier along the transverse direction and the longitudinal direction, and a pipe hole is reserved in the center of the construction column;

[0012] The construction columns in each direction are connected into a whole through the crown beam structure and the tie beam structure;

[0013] A steel strand prestressed beam is arranged in each construction column;

[0014] The steel strand prestressed beam is extended downward to the inside of the pile cap, and the steel strand prestressed beam is fixed by a prestressed beam anchoring device in the inside of the pile cap;

[0015] The steel strand prestressed beam is extended upward to the top of the crown beam, and prestress is applied to the steel strand prestressed beam by a prestressed tensioning device at the top of the crown beam structure.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The stone arch bridge pier is reinforced by the prestressed construction column structure, which can effectively improve the shear strength of the pier, avoid the adverse effects of the strong horizontal force formed by the water flow on the root of the pier under the action of the water flow, effectively strengthen the arch ring at the arch foot, enhance the stress performance of the arch ring at the arch foot, play a role in protecting the arch, thereby enhancing the integrity of the stone arch bridge and improving the self-bearing capacity of the stone arch bridge. By combining the reinforced concrete structure with the stone masonry structure, the advantages of the reinforced concrete structure, such as high strength and high overall stability, are fully utilized, the shortcomings of the stone arch bridge masonry structure in terms of stress are made up, and the prestressed construction column structure in the present application is simple and flexible, has the characteristics of convenient construction, safety and efficiency, economy and practicality, has good economic effect and social benefit, and can be widely and flexibly applied. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The illustrations are shown singularly in the drawings. It will be appreciated that the drawings are not limiting of the present application, but rather serve as an aid in understanding it.

[0019] Figure 1 Elevation view of the present application;

[0020] Figure 2 Elevation view of the present application; Figure 1 Cross-sectional view of the present application;

[0021] Figure 3 Cross-sectional view of the present application; Figure 1 Cross-sectional view of the present application;

[0022] Figure 4 Cross-sectional view of the present application; Figure 1 Cross-sectional view of the present application;

[0023] Figure 5 Schematic view of the prestressing tensioning device part of the present application;

[0024] Figure 6 Schematic view of the anchoring device part of the present application. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] A prestressed structural column structure suitable for reinforcing the piers of stone arch bridges, such as Figures 1 to 6 As shown, the structure includes several reinforced concrete structural columns 2 symmetrically arranged along the transverse and longitudinal directions inside the pier body 1. The structural columns in each direction are connected into a whole by a cap beam structure and a tie beam structure, and a prestressed tendon structure is provided inside each structural column. The prestressed tendon structure extends upward to the top of the cap beam structure and downward to the inside of the pier cap 10, thereby applying prestress to the structural column. The cap beam structure includes a longitudinal reinforced concrete cap beam 3 and a transverse reinforced concrete cap beam 4 arranged at the top of the structural column. The tie beam structure includes a longitudinal reinforced concrete tie beam 5 and a transverse reinforced concrete tie beam 6 arranged in the middle of the structural column.

[0030] The longitudinal reinforced concrete capping beam connects the structural columns into a whole along the longitudinal direction of the bridge and forms cantilevered sections at both ends; the transverse reinforced concrete capping beam connects the structural columns into a whole along the transverse direction of the bridge and its two ends are flush with the edges of the structural columns; the cross-sectional widths of the longitudinal and transverse reinforced concrete capping beams are the same as the cross-sectional widths of the structural columns; the prestressed tendon structure includes steel strand prestressed tendons 7 that penetrate the structural columns, the steel strand prestressed tendons extending upward to the top of the capping beam, and a prestressing tensioning device 8 is installed at the top of the capping beam structure; the steel strand prestressed tendons extend downward to the interior of the pier cap, and a prestressed tendon anchoring device 9 is installed inside the pier cap.

[0031] The cross-sectional shape of the aforementioned structural columns includes, but is not limited to, square, rectangular, or circular shapes. The prestressing tensioning device and anchoring device can both be conventionally designed using existing technology. For example, the prestressing tensioning device 8 includes steel strand prestressing tendons 7, corrugated pipes 11, steel mesh 12, spiral reinforcement 13, anchor cups 14, and anchorages 15. The anchoring device 9 includes prestressing tendons 7, corrugated pipes 11, steel mesh 12, spiral reinforcement 13, and compression springs 16. The prestressed structural column structure, extending from the top of the cap beam to the abutment, is installed inside the stone arch bridge pier, effectively bearing the load of the pier body and the load transmitted from the arch ring, and transferring the load to the abutment foundation.

[0032] The longitudinal reinforced concrete tie beams connect the constructional columns two by two in the longitudinal bridge direction; the transverse reinforced concrete tie beams connect the constructional columns two by two in the transverse bridge direction. The sectional width of the longitudinal reinforced concrete tie beams and the transverse reinforced concrete tie beams is less than or equal to the sectional width of the constructional columns, so that the stress points and the transmission routes of the constructional column structure are clear, and the stress condition is better.

[0033] The number of the constructional columns arranged in the transverse bridge direction and the longitudinal bridge direction can be reasonably and flexibly determined according to the actual size and stress characteristics of the pier body. Generally, at least two rows of the constructional columns are symmetrically arranged in the longitudinal bridge direction. As an example, the constructional column is provided with a steel strand prestressed beam pipe hole in the center, and the steel strand prestressed beam is arranged through the center of the constructional column.

[0034] The reinforced concrete constructional column structure has high strength and strong stability, and can well optimize the mechanical properties of the overall structure of the stone arch bridge. The crown beam structure and the tie beam structure connect the constructional columns into a whole, and the steel strand prestressed beam is arranged in the constructional column to apply prestress to the constructional column. At the same time, the tie beams in the longitudinal bridge direction are provided with appropriate cantilever lengths at both ends, which not only ensures the structural safety of the pier body, but also enhances the mechanical properties of the arch ring at the arch spring, thereby improving the overall structural bearing capacity and durability of the stone arch bridge, and greatly improving the structural reliability.

[0035] A construction method of a prestressed constructional column structure suitable for reinforcing a pier body of a stone arch bridge is provided below, which comprises the following steps:

[0036] A plurality of reinforced concrete constructional columns are symmetrically constructed in the transverse bridge direction and in the longitudinal bridge direction inside the pier body, and a pipe hole is reserved in the center of the constructional column;

[0037] The constructional columns in each direction are connected into a whole through the crown beam structure and the tie beam structure;

[0038] A steel strand prestressed beam is arranged in each constructional column;

[0039] The steel strand prestressed beam is extended downward to the inside of the pile cap, and is fixed by a prestressed beam anchoring device in the inside of the pile cap;

[0040] The steel strand prestressed beam is extended upward to the top of the crown beam, and is applied with prestress by a prestressed tensioning device at the top of the crown beam structure.

[0041] The prestressed construction column structure is used for reinforcing the stone arch bridge pier body, the shear strength of the pier body can be effectively improved, under the action of water flow, the adverse effect of the strong horizontal force formed by the water flow on the root of the pier body can be avoided, meanwhile, the arch ring at the arch foot is effectively strengthened, the stress performance of the arch ring at the arch foot is enhanced, the arch is protected, the integrity of the stone arch bridge is enhanced, and the self bearing capacity of the stone arch bridge is improved. The prestressed construction column structure is combined with the reinforced concrete structure and the stone masonry structure, the advantages of the reinforced concrete structure, such as high strength and high overall stability, are fully utilized, the stress deficiency of the stone masonry structure of the stone arch bridge is made up, the prestressed construction column structure in the application has the characteristics of simple and flexible structure, convenient construction, safe and efficient, economical and practical, and the like, has good economic and social benefits, and can be widely and flexibly applied.

[0042] The above merely describes the preferred embodiments of the application, and is not intended to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A prestressed structural column structure suitable for reinforcing the piers of stone arch bridges, characterized in that: The pier structure includes several reinforced concrete structural columns symmetrically arranged along both the transverse and longitudinal directions. These columns are connected as a whole by capping beams and tie beams, and each column contains a prestressed tendon structure. The prestressed tendon structure extends upwards to the top of the capping beam structure and downwards to the pier cap, thus applying prestress to the structural column. The capping beam structure includes longitudinal and transverse reinforced concrete capping beams located at the top of the structural columns. The tie beam structure includes longitudinal and transverse reinforced concrete tie beams located in the middle of the structural columns. The longitudinal reinforced concrete capping beams connect the structural columns along the longitudinal direction and form cantilevered sections at both ends. The transverse reinforced concrete... The capping beam connects the structural columns transversely along the bridge direction into a whole, with both ends flush with the edges of the structural columns; the cross-sectional widths of the longitudinal and transverse reinforced concrete capping beams are the same as the cross-sectional widths of the structural columns; the prestressed tendon structure includes steel strand prestressed tendons that penetrate the structural columns, extending upwards to the top of the capping beam, with a prestressing tensioning device installed at the top of the capping beam structure; the steel strand prestressed tendons extend downwards into the foundation, with a prestressed tendon anchoring device installed inside the foundation; longitudinal reinforced concrete tie beams connect the structural columns in pairs along the longitudinal direction; transverse reinforced concrete tie beams connect the structural columns in pairs along the transverse direction; a pre-drilled hole for the steel strand prestressed tendons is reserved in the center of each structural column, and the steel strand prestressed tendons are arranged through the center of the structural column.

2. The prestressed structural column structure for reinforcing stone arch bridge piers according to claim 1, characterized in that: The cross-sectional shape of the structural column includes, but is not limited to, a square, a rectangle, or a circle.

3. The prestressed structural column structure for reinforcing stone arch bridge piers according to claim 1, characterized in that: The structural columns are arranged symmetrically in at least two rows along the longitudinal direction of the bridge.

4. A construction method for a prestressed structural column structure suitable for reinforcing the piers of stone arch bridges, characterized in that, Includes the following steps: Several reinforced concrete structural columns are symmetrically constructed inside the pier along the transverse and longitudinal directions of the bridge, and pipe holes are reserved in the center of the structural columns. The structural columns in all directions are connected into a whole through the cap beam structure and tie beam structure; Steel strand prestressed tendons are threaded inside each structural column. The steel strand prestressed tendons are extended downward into the pile cap, and the steel strand prestressed tendons are fixed inside the pile cap by a prestressed tendon anchoring device. The steel strand prestressed tendons are extended upward to the top of the cap beam, and prestress is applied to the steel strand prestressed tendons at the top of the cap beam structure through a prestressing tensioning device.

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