Double-limb thin-wall Y-shaped pier

Abstract

The present invention discloses a double-limb thin-walled Y-shaped column and a double-limb thin-walled Y-shaped pier, which includes a pile cap foundation and arc-shaped columns. The arc-shaped columns are arranged in pairs on the pile cap foundation, and the two arc-shaped columns form a double-leg Y-shaped pier column with a hollow middle. A column cap is installed at the top of the arc-shaped column, and the two column caps are connected by a transverse tie beam. The beneficial effects of the present invention are as follows: It is split into two column caps and two arc-shaped columns, and prefabricated and processed by mechanized flow operation in the factory. The arc-shaped columns can be prefabricated in a supine position, which is convenient for manufacturing, storage and transportation. Before installation, it can be assembled into an integral double-limb thin-walled Y-shaped pier in the factory. The above-mentioned split prefabrication and assembly into hollow components not only ensure its structural strength but also save 30% - 40% of raw materials. During on-site installation, mechanized hoisting is adopted, and the on-site operation time is less than 3 days. Compared with the original cast-in-place pier column, the on-site operation time is significantly shortened, thus reducing the time of road traffic and urban environmental impact.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, especially the double-limb thin-wall Y-shaped pier. Background Art

[0002] The pier mainly consists of a top cap or capping beam and a pier body. The abutment mainly consists of a top cap and an abutment body. The function of the top cap or capping beam is to evenly disperse the large and concentrated forces transmitted from the bridge span supports to the pier body and the abutment body. Therefore, the top cap has relatively high strength requirements. In addition, the top cap and capping beam must also have a relatively large planar dimension to provide a necessary working surface for construction, beam erection, maintenance, and repair. The pier body and the abutment body are the main structures supporting the bridge span. They not only bear all the loads transmitted from the bridge span structure but also directly bear various loads such as earth pressure, water flow impact force, ice pressure, and ship impact force. Therefore, both the pier body and the abutment body have sufficient strength, stiffness, and stability.

[0003] Piers can be divided into thin-wall piers, flexible piers, column piers, and pile piers. The existing thin-wall piers include reinforced concrete thin-wall piers, double-wall piers, and V-shaped piers. Their advantages are that they can save materials, reduce the self-weight of the pier, and at the same time, the double-wall pier can increase the stiffness of the pier, reduce the negative moment at the main beam support point, and enhance the aesthetics of the bridge. However, during the construction of the existing piers, on-site casting is required. Before casting, formwork and supports need to be erected, and after reaching the age, the formwork and supports need to be removed. The pier also requires a long time for maintenance, and the pier column, capping beam, and top cap need to be constructed separately, resulting in a long overall construction period, a large demand for construction sites, and a greater impact on the traffic of the roads along the line and the urban environment. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a double-limb thin-wall Y-shaped pier that is convenient for construction, saves raw materials, and has a stable structure.

[0005] The purpose of the present invention is achieved through the following technical solutions: A double-limb thin-wall Y-shaped pier, including a caisson foundation and arc columns. The arc columns are arranged in pairs on the caisson foundation, and the two arc columns form a double-leg Y-shaped pier column with a hollow middle. A column cap is installed at the top of the arc columns, and the two column caps are connected by a transverse tie beam.

[0006] Preferably, the column cap is located at the upper end of the arc column and is precast integrally with the arc column.

[0007] Preferably, anchor holes are reserved inside the column cap for the anchor bars of the transverse tie beam to pass through.

[0008] Preferably, the two arc columns are also connected by a transverse tie beam.

[0009] Preferably, the pile cap base includes pile foundations, a base installation layer, and a fixing layer. The pile cap base is supported by the pile foundations. A groove B is provided on the upper surface of the base installation layer. The lower end of the arc-shaped column is installed in the groove B. The fixing layer is cast on the upper surface of the base installation layer by concrete, and the lower end of the arc-shaped column is located within the fixing layer.

[0010] Preferably, steel bars B are embedded in the groove B of the base installation layer. The steel bars B are located between the two arc-shaped columns and are within the fixing layer.

[0011] Preferably, a number of anchor rod groups are embedded in the base installation layer. A connecting member is installed on the anchor rod groups through nuts. One side wall of the connecting member is in contact with the outer side wall of the arc-shaped column.

[0012] Preferably, a threaded connection sleeve is embedded on the outer side of the lower end of the arc-shaped column, and the threaded connection sleeve corresponds to the anchor rod group in terms of spatial position.

[0013] Preferably, the connecting member is a steel section member. Through holes for the anchor rod groups to pass through and through holes for the screw rods to pass through are provided on the working surface of the connecting member. The screw rods pass through the corresponding through holes and are connected to the threaded connection sleeve. The anchor rod groups pass through the corresponding through holes and are locked by nuts.

[0014] The present invention has the following advantages: For the double-limb thin-walled Y-shaped pier of the present invention, the arc-shaped column and the column cap are prefabricated integrally and completed by mechanized flow operation in the factory. The arc-shaped column can be prefabricated in a supine position, which is convenient for manufacturing, storage, and transportation. Before installation, the integral double-limb thin-walled Y-shaped pier can be assembled in the factory. The above-mentioned split prefabrication and assembly into a hollow member not only ensure its structural strength but also save 30% - 40% of raw materials. During on-site installation, mechanized hoisting can be adopted, and the on-site operation time is less than 3 days. Compared with the on-site operation time of more than 25 days required for the original cast-in-place pier column cap, the on-site operation time is significantly shortened, thereby reducing the time of road traffic and urban environmental impact. A groove B is provided on the base installation layer, the arc-shaped column is installed in the groove B, and the arc-shaped column is temporarily fixed through the connecting member. Finally, the fixing layer is cast to fill the lower end of the arc-shaped column within a certain range into a solid pier column to improve the anti-collision ability of the double-limb thin-walled Y-shaped pier of the double-limb thin-walled pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the structural schematic diagram of the present invention Figure 1 ;

[0016] Figure 2 is the side view schematic diagram of the column cap in the Figure 1 A-A direction;

[0017] Figure 3 is the installation schematic diagram of the anchor rod group;

[0018] Figure 4 is for Figure 3Schematic diagram of the structure of H-H;

[0019] Figure 5 Figure 3 Schematic diagram of the structure of J-J;

[0020] Figure 6 Installation schematic diagram of the connecting piece;

[0021] In the figure, 1 - arc column, 2 - transverse tie beam, 3 - pile cap foundation, 4 - column cap, 31 - pile foundation, 32 - foundation installation layer, 33 - fixing layer, 34 - groove B, 35 - steel bar B, 36 - anchor rod group, 37 - connecting piece, 41 - groove A, 42 - anchor hole. Specific implementation mode

[0022] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0025] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] As Figure 1 shown, the double-limb thin-wall Y-shaped pier includes a bearing platform base 3 and an arc column 1. The arc columns 1 are arranged in pairs on the bearing platform base 3, and the two arc columns 1 form a double-leg Y-shaped pier column with a hollow middle. A column cap 4 is installed on the top of the arc column 1. Further, the two column caps 4 are connected by a transverse tie beam 2, and the two arc columns 1 are also connected by the transverse tie beam 2. The transverse tie beam 2 is provided to increase the lateral stiffness of the Y-shaped pier, thereby increasing the structural strength of the Y-shaped pier. The bearing platform base 3 belongs to on-site construction, while the column cap 4 and the arc column 1 are both prefabricated and processed by mechanized flow operation in the factory. The arc column 1 can be prefabricated in a supine position, which is convenient for manufacturing, storage and transportation. Before installation, the arc column 1 and the column cap 4 can be assembled into an integral double-limb thin-wall Y-shaped pier in the factory. The arc column 1 and the column cap 4 are prefabricated integrally, and the two arc columns 1 are assembled into a hollow member through the transverse tie beam 2, which not only ensures its structural strength but also saves 30% - 40% of raw materials. During on-site installation, mechanized hoisting can be used, and its on-site operation takes less than 3 days. Compared with the on-site operation time of more than 25 days required for the original cast-in-place pier column cap 4, the on-site operation time is significantly shortened, thereby reducing the time of road traffic and urban environmental impact.

[0029] In this embodiment, as Figure 2As shown, anchor bars for the transverse tie beam are reserved inside the column cap 4 to pass through the anchor holes 42 for the anchor bars of the top transverse tie beam 2 to pass through. Further, for the curved column 1, its cross-section can be rectangular, circular or other shapes, and the material can be reinforced concrete, concrete-filled steel tube, or steel structure. Preferably, the cross-section of the curved column 1 is rectangular. Therefore, the groove A41 is a rectangular groove, and the size of the groove A41 is slightly larger than the external size after the two curved columns 1 are assembled. A number of anchor bolts can be provided inside the middle of the curved column 1 for connecting members of the middle transverse tie beam 2. In this embodiment, both the through holes of the column cap 4 and the anchor bolts in the middle of the curved column 1 are set during the prefabrication of the precast curved column 1. During installation, the anchor bolts pass through the anchor bolt holes and are then locked with nuts. Further, after the anchor bolts are installed, grouting holes are reserved on the column cap 4, and grout is poured into the grouting holes to fill the gap between the anchor bolts and the anchor bolt holes, and at the same time, the firmness of the installation between the beam and the curved column 1 is also improved.

[0030] In this embodiment, as Figure 3As shown in FIGS. 0 to 6, the pile cap base 3 includes a pile foundation 31, a base installation layer 32 and a fixing layer 33. The pile cap base 3 is supported by the pile foundation 31. A groove B34 is provided on the upper surface of the base installation layer 32. The lower end of the arc-shaped column 1 is installed in the groove B34. The groove B34 is also a rectangular groove, and its size is slightly larger than the external dimension after the two arc-shaped columns 1 are assembled. Further, steel bars B35 are embedded in the groove B34 of the base installation layer 32. The steel bars B35 are located between the two arc-shaped columns 1. To facilitate the installation of the arc-shaped column 1, a number of anchor rod groups 36 are embedded in the base installation layer 32. A connecting member 37 is installed on the anchor rod group 36 through a nut. One side wall of the connecting member 37 is in contact with the outer side wall of the arc-shaped column 1. Further, a threaded connection sleeve is embedded on the outer side of the lower end of the arc-shaped column 1, and the threaded connection sleeve corresponds to the anchor rod group 36 in spatial position. Preferably, the connecting member 37 is a profiled steel member, and the two working surfaces of the connecting member 37 intersect at a right angle. Through holes for the anchor rod group 36 to pass through and through holes for the screw rod to pass through are provided on the working surface of the connecting member 37. The screw rod passes through the corresponding through hole and is connected to the threaded connection sleeve. The anchor rod group 36 passes through the corresponding through hole and is locked by a nut. When installing the arc-shaped column 1, the lower end of the arc-shaped column 1 is installed in the groove B34, and then the connecting member 37 is installed so that one working surface of the connecting member 37 is closely attached to the top of the base installation layer 32, and the other working surface is closely attached to the outer side wall of the arc-shaped column 1. Then, the arc-shaped column 1 can be temporarily fixed by using the nut and the screw rod. Further, to facilitate the installation of the connecting member 37, the through hole for the anchor rod group 36 to pass through on the connecting member 37 is a round hole or a long strip-shaped waist-shaped hole. Preferably, the through hole is a long strip-shaped waist-shaped hole. After the arc-shaped column 1 is pre-fixed, the fixing layer 33 is poured on the base installation layer 32. When the fixing layer 33 is poured well, at this time, the lower end of the arc-shaped column 1 is located in the fixing layer 33, and the steel bars B35 are also located in the fixing layer 33. Therefore, the fixing layer 33 pours the lower end of the arc-shaped column 1 into a solid pier within a certain range to improve the anti-collision ability of the double-limb thin-wall Y-shaped pier, thereby improving the reliability of the double-limb thin-wall Y-shaped pier.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Double-limb thin-wall Y-shaped pier, characterized in that: It includes a bearing platform base and arc-shaped columns. The arc-shaped columns are arranged in pairs on the bearing platform base, and the two arc-shaped columns form a double-leg Y-shaped pier column with a hollow middle. A column cap is installed at the top of the arc-shaped columns, and the two column caps are connected by a transverse tie beam. The two arc-shaped columns are also connected by the transverse tie beam. The column cap is located at the upper end of the arc-shaped column and is precast integrally with the arc-shaped column. Anchor holes for the anchoring steel bars of the transverse tie beam are reserved inside the column cap. The arc-shaped columns are precast in a supine position, and the cross-section of the arc-shaped column is rectangular. The bearing platform base includes pile foundations, a base installation layer, and a fixing layer. The bearing platform base is supported by the pile foundations. A groove B is provided on the upper surface of the base installation layer, and the lower end of the arc-shaped column is installed in the groove B. The fixing layer is cast with concrete on the upper surface of the base installation layer, and the lower end of the arc-shaped column is located inside the fixing layer. Reinforcing bars B are embedded in the groove B of the base installation layer. The reinforcing bars B are located between the two arc-shaped columns and are inside the fixing layer. A number of anchor rod groups are embedded on the base installation layer. Connectors are installed on the anchor rod groups through nuts. One side wall of the connector is in contact with the outer side wall of the arc-shaped column. Threaded connection sleeves are embedded on the outer side of the lower end of the arc-shaped column, and the threaded connection sleeves correspond to the anchor rod groups in spatial position.

2. The double-limb thin-walled Y-shaped pier according to claim 1, wherein: The connector is a steel section member. Through holes for the anchor rod groups to pass through and through holes for the screw rods to pass through are provided on the working surface of the connector. The screw rods pass through the corresponding through holes and are connected to the threaded connection sleeves. The anchor rod groups pass through the corresponding through holes and are locked by the nuts.

Images