Full-prefabricated assembly type double-column high pier device

Abstract

The utility model discloses a full-prefabricated assembly type double-column high pier device which comprises a cover beam (13), a bearing platform (6), a pier column upper section (11), a pier column lower section (1) and a pier column middle section (10) with a tie beam, socket holes (14) are formed in the bottom face of the cover beam (13) and the top face of the bearing platform (6), and pier column socket sections (9) embedded in the socket holes (14) are arranged on the upper portion of the pier column upper section (11) and the lower portion of the pier column lower section (1) respectively. Gaps (3) between the pier column socket sections (9) and the socket holes (14) are filled with high-strength shrinkage-free cement grouting materials (4), and corrugated steel pipes (5) are adopted on the inner walls of the socket holes (14) of the cover beam (13) and the bearing platform (6) to serve as permanent templates. The component is low in transporting and hoisting difficulty, the mechanical property of a connecting joint is reliable, the construction precision requirement is low, and good economic benefits are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to highway bridge construction device, and specifically points to full prefabricated assembly type double column high pier device. BACKGROUND

[0002] With the continuous promotion of new industrialization and urbanization, prefabricated assembly type bridge construction technology has been widely used, significantly improving engineering efficiency, realizing component standardization and orderly work cycle, reducing environmental interference while accelerating the bridge construction process. At present, the prefabricated assembly type pier column system has developed a variety of node connection schemes, such as grouting sleeve connection, grouting corrugated pipe connection, slot type connection and socket type connection. Among them, the socket type connection node is to insert the prefabricated pier column into the reserved hole of the target connecting component, and to be fixedly connected by filling high-strength grouting material in the gap. Compared with other connection methods, socket type connection has the advantages of low precision requirement, less on-site construction and installation operation, and simple construction process. However, socket type connection technology is mostly used for the connection of pier column and pile cap and bent cap. For common double column high pier, the volume of pier column is large, and the transportation and hoisting are difficult. Moreover, since the inter-pier beam is often used to connect the double column high pier, the transportation and hoisting of prefabricated pier column are further difficult, which is not conducive to the advantages of prefabricated assembly technology, such as convenient and efficient construction.

[0003] Therefore, in view of the above-mentioned deficiencies of the prior art, there is an urgent need in the market for a new full prefabricated assembly type double column high pier device. SUMMARY

[0004] The utility model provides a kind of full prefabricated assembly type double column high pier device, and the full prefabricated assembly type double column high pier device and its construction method are further on the basis of socket type connection, pier column segment connection technology is further used, high pier is disassembled into short pier column segment and pier column segment with tie beam, welding connection is used to ensure the quick splicing and connection strength between pier column segment, overcome the problem that prefabricated component volume is large and is not easy to transport and hoist caused by double column high pier.

[0005] Technical scheme: the utility model provides full prefabricated assembly type double column high pier device, including bent cap, pile cap, pier column upper segment, pier column lower segment and pier column middle segment with tie beam, bent cap bottom surface and pile cap top surface are equipped with socket hole, pier column upper segment upper portion and pier column lower segment lower portion are respectively pier socket segment embedded in the socket hole of bent cap and pile cap, after pier socket segment is inserted into socket hole, high-strength non-shrinkage cement grouting material is filled in gap to connect pier column and bent cap and pile cap, and the inner wall of socket hole of bent cap and pile cap is used as permanent formwork.

[0006] Preferably, the lower part of the upper segment of the pier column, the upper part of the lower segment of the pier column and the two ends of the middle segment of the pier column with tie beam are provided with circular steel plates, and notches are provided on the periphery of the steel plates. The connection of the pier column segments is achieved by butt jointing the steel plates of the two segments of the pier column and then circumferentially welding in the notches.

[0007] Preferably, the socketed segments of the lower segment of the pier column and the upper segment of the pier column are provided with a plurality of circumferential shear key teeth, and the diameter of the pier column cross section in the recessed part of the shear key teeth is smaller than the diameter of the cross section of the non-socketed segment of the pier column.

[0008] Preferably, the top of the bent cap is provided with grouting holes, preferably 5, and the size of the grouting holes is not less than 5 cm. The center of one of the grouting holes coincides with the center of the socket hole, and the remaining four grouting holes are arranged in a ring above the gap between the socketed segment of the upper segment of the pier column and the socket hole, connecting the top surface of the bent cap and the socket hole.

[0009] Preferably, the diameter of the circular steel plate is consistent with the diameter of the non-socketed segment of the pier column, and the surface is provided with a through hole. The plane position of the center of the hole is consistent with the plane position of the center of the longitudinal reinforcement of the pier column. The diameter of the hole is 1.2 times the diameter of the longitudinal reinforcement of the pier column on the side where the longitudinal reinforcement of the pier column penetrates the steel plate, and expands outward at an angle of 45° to the thickness direction of the steel plate until the other side of the steel plate. The longitudinal reinforcement of the pier column is inserted into the hole, and the end plane of the longitudinal reinforcement is flush with the plane of the circular steel plate. The hole is filled with a hole plug, and the hole plug is welded.

[0010] The construction method of the full-precast assembled double-column high pier device comprises the following steps:

[0011] Step 1, prefabrication of the pile cap and the bent cap: binding the reinforcement cages of the pile cap and the bent cap, wherein the bent cap reinforcement cage is inverted so that the reserved socket hole faces upward, installing the corrugated steel pipes and the outer formwork in the reserved holes of the pile cap and the bent cap reinforcement cages, and pouring the pile cap and the bent cap;

[0012] Step 2, prefabrication of the pier column segments: binding the reinforcement cages of the pier column, inserting the circular steel plates into the longitudinal reinforcement of the pier column according to the hole position at the top of the upper segment of the pier column, the bottom of the lower segment of the pier column and the top and bottom of the middle segment of the pier column with tie beam, and making the end plane of the longitudinal reinforcement of the pier column flush with the plane of the circular steel plate, performing hole plug welding of the longitudinal reinforcement of the pier column, directly pouring the upper and lower segments of the pier column, and pouring the two pier column reinforcement cages according to the distance between the double-column piers and the tie beam reinforcement cage after being placed in combination;

[0013] Step 3, splicing of the lower segment of the pier column and the pile cap: placing a cushion on the bottom surface of the pile cap socket hole, the height of the cushion is 2 cm, hoisting the two lower segments of the pier column into the two socket holes of the pile cap respectively, and pouring high-strength non-shrinkage cement grout into the gap between the socketed segment of the pier column and the socket hole;

[0014] Step 4, splicing the lower segment of the pier column with the middle segment of the pier column with tie beam: hoist the middle segment of the pier column with tie beam and place it on the top surface of the two lower segments 1 of the pier column, so that the circular steel plates on the bottom surface of the two pier columns of the middle segment of the pier column with tie beam coincide with the circular steel plates on the top surface of the two pier columns of the lower segment of the pier column, and perform circumferential welding through the groove on the side of the steel plate at the splicing point.

[0015] Step 5, splicing the upper segment of the pier and the middle segment of the pier with tie beam: hoist the two upper segments of the pier to the top surfaces of the two middle segments of the pier with tie beam, and make the circular steel plate on the bottom surface of the upper segment of the pier coincide with the two circular steel plates on the bottom surface of the middle segment of the pier with tie beam. Then, perform circumferential welding through the groove on the side of the steel plate at the splicing point.

[0016] Step 6, splicing the cap beam and the upper segment of the pier: Place pads 2cm high on the top surface of the upper segments of the two piers respectively. Hoist the cap beam so that the two socket holes are aligned with the upper segments of the two piers respectively and then lower it into position. First, start grouting from the four circumferential grouting holes. Select two of them as grouting holes and the other two as vent holes. After the grouting holes are filled, grout the other two grouting holes until they are full. Finally, grout the middle grouting hole until it is full, and complete the construction of the fully prefabricated double-column high pier device.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] (1) The fully prefabricated double-column high pier device of this utility model adopts a socket connection between the pier column, the cap beam and the pier cap, which has the characteristics of low construction accuracy requirements and fast construction speed.

[0019] (2) The large-volume double-column high piers are broken down into small-volume tie beam pier segments and other short pier segments, which reduces the difficulty of transporting and hoisting prefabricated components.

[0020] (3) The pier segments are connected by welding, which is fast and has good mechanical properties, and can prevent the connection from being damaged under seismic action;

[0021] (4) Corrugated steel pipes are used as permanent templates for the socket holes of the pier cap and the cap beam, which reduces the use of templates. At the same time, the corrugated steel pipes can improve the restraint effect of the pier cap and the cap beam on the pier column, prevent the socket joint from being damaged under seismic action, and ensure that the damage occurs in the plastic hinge area of ​​the pier column. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a top view showing the location of the grouting holes in the cap beam;

[0024] Figure 3This is a top view of the connection between the cap beam and the pier column;

[0025] Figure 4 This is a top view of a mid-segment of a pier column with tie beams;

[0026] Figure 5 This is a top view of the connection between the foundation and the pier column;

[0027] Figure 6 for Figure 1 A magnified view of part A. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described below.

[0029] like Figures 1 to 6 As shown, the fully prefabricated double-column high pier device of this embodiment includes a cap beam 13, a pier cap 6, an upper pier segment 11, a lower pier segment 1, and a middle pier segment 10 with a tie beam. The bottom surface of the cap beam 13 and the top surface of the pier cap 6 are provided with socket holes 14. The upper part of the upper pier segment 11 and the lower part of the lower pier segment 1 are respectively embedded in the socket holes 14 of the cap beam 13 and the pier cap 6. After the pier segment 9 is inserted into the socket hole 14, high-strength non-shrink cement grout 4 is poured into the gap 3 to connect the pier with the cap beam 13 and the pier cap 6. The lower part of the upper pier segment 11, the upper part of the lower pier segment 1, and both ends of the middle pier segment 10 with a tie beam are provided with circular steel plates 7. The outer periphery of the steel plates 7 is provided with grooves. The connection of the pier segments is achieved by butt welding the steel plates 7 of the two pier segments together and then circumferentially welding them in the grooves.

[0030] The inner walls of the socket holes 14 of the cap beam 13 and the pier cap 6 are made of corrugated steel pipe 5 as permanent formwork. The use of corrugated steel pipe 5 can reduce the use of formwork, and at the same time, it has a good restraining effect on the pier columns inserted therein, preventing the pier columns from being pulled out of the pier cap 6 and the cap beam 13 under the action of earthquake, thus avoiding the occurrence of a non-ideal brittle failure mode.

[0031] The lower segment 1 and the upper segment 11 of the pier are provided with multiple circumferential trapezoidal shear keys 8. The diameter of the pier section at the recess of the shear key 8 is smaller than the diameter of the non-supplied segment of the pier.

[0032] Five grouting holes 12 are provided on the top of the cap beam 13. The diameter of the grouting hole 12 is not less than 5cm. The center of one of the grouting holes 12 coincides with the center of the socket hole 14. The other four grouting holes 12 are arranged circumferentially above the gap 3 between the socket section 9 of the upper segment 11 of the pier column and the socket hole 14, connecting the top surface of the cap beam 13 and the socket hole 14.

[0033] The diameter of the circular steel plate 7 is the same as that of the non-supplied section of the pier column. A through hole is reserved on the surface. The plane position of the center of the hole is the same as the plane position of the center of the longitudinal reinforcement 2 of the pier column. The diameter of the hole is 1.2 times the diameter of the longitudinal reinforcement 2 of the pier column on the side where the longitudinal reinforcement 2 of the pier column passes through the steel plate 7. The hole expands outward at a 45° angle with the thickness direction of the steel plate 2 until the other side of the steel plate 2 to provide sufficient space for welding connection between the longitudinal reinforcement 2 of the pier column and the steel plate 7. The longitudinal reinforcement 2 of the pier column is inserted into the hole and its end plane is flush with the plane of the circular steel plate 7. Through-hole plug welding is performed between the longitudinal reinforcement 2 of the pier column and the hole of the circular steel plate 7.

[0034] The construction method of the fully prefabricated double-column high pier device in this embodiment.

[0035] Step 1, Prefabrication of foundation 6 and cap beam 13: Tie the steel reinforcement cages of foundation 6 and cap beam 13, wherein the steel reinforcement cage of cap beam 13 is inverted so that the reserved socket hole faces upward. Install corrugated steel pipe 5 and external formwork in the reserved hole of the steel reinforcement cage of foundation 6 and cap beam 13, and pour the concrete for foundation 6 and cap beam 13.

[0036] Step 2, Prefabrication of pier segments: Tie the reinforcing cage of the pier. Insert circular steel plates 7 into the longitudinal reinforcement 2 of the pier according to the hole positions at the top of the reinforcing cage of the upper segment 11 of the pier, the bottom of the reinforcing cage of the lower segment 1 of the pier, and the top and bottom of the middle segment 10 of the pier with tie beams, so that the end plane of the longitudinal reinforcement 2 of the pier is flush with the plane of the circular steel plate 7. Perform through-hole plug welding on the longitudinal reinforcement 2 of the pier. The upper and lower segments of the pier are directly cast. The two pier reinforcing cages of the middle segment 10 of the pier with tie beams are placed according to the double-column pier spacing and then combined with the tie beam reinforcing cage for casting.

[0037] Step 3, splicing of the lower segment 1 of the pier column and the foundation 6: Place a pad block with a height of 2cm on the bottom surface of the socket hole 14 of the foundation 6, hoist the two lower segments 1 of the pier column into the two socket holes 14 of the foundation 6 respectively, and inject high-strength non-shrink cement grout 4 into the gap 3 between the socket segment 9 of the pier column and the socket hole 14.

[0038] Step 4, splicing of the lower segment 1 of the pier and the middle segment 10 of the pier with tie beam: The middle segment 10 of the pier with tie beam is hoisted and placed on the top surface of the two lower segments 1 of the pier, so that the circular steel plates 7 on the bottom surface of the two pier segments 10 of the middle segment 10 of the pier with tie beam coincide with the circular steel plates 7 on the top surface of the two pier segments 1 of the lower segment 1 of the pier. Circumferential welding is performed through the groove on the side of the steel plate at the splicing point.

[0039] Step 5, splicing of the upper segment 11 of the pier and the middle segment 10 of the pier with tie beam: hoist the two upper segments 11 of the pier to the top surfaces of the two middle segments 10 of the pier with tie beam, and make the circular steel plate 7 on the bottom surface of the upper segment 11 of the pier overlap with the two circular steel plates 7 on the bottom surface of the middle segment 10 of the pier with tie beam, and perform circumferential welding through the groove on the side of the steel plate at the splicing point.

[0040] Step 6, splicing the cap beam 13 with the upper segment 11 of the pier: Place pads 2cm high on the top surface of the upper segment 11 of the two piers respectively. Hoist the cap beam 13 so that the two socket holes 14 are aligned with the upper segments 11 of the two piers respectively and then lower it into position. First, start grouting from the four circumferential grouting holes 12. Select two of them as grouting holes and the other two as vent holes. After the grouting holes are filled, grout the other two grouting holes 12 until they are full. Finally, grout the middle grouting hole 12 until it is full, and complete the construction of the fully prefabricated double-column high pier device.

[0041] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A fully prefabricated, assembled double-column high pier device, comprising a cap beam (13), a pier cap (6), an upper segment (11) of the pier column, a lower segment (1) of the pier column, and a middle segment (10) of the pier column with a tie beam, characterized in that: The bottom surface of the cap beam (13) and the top surface of the pier cap (6) are provided with socket holes (14). The upper part of the upper segment (11) of the pier column and the lower part of the lower segment (1) of the pier column are respectively provided with pier column socket sections (9) embedded in the socket holes (14). The gap (3) between the pier column socket section (9) and the socket hole (14) is filled with high-strength non-shrink cement grout (4). The inner wall of the socket holes (14) of the cap beam (13) and the pier cap (6) is made of corrugated steel pipe (5) as a permanent template.

2. The fully prefabricated assembled double-column high pier device according to claim 1, characterized in that: The lower segment (1) and the upper segment (11) of the pier are provided with multiple circumferential shear keys (8). The diameter of the pier section at the recess of the shear key (8) is smaller than the diameter of the non-supplied segment of the pier.

3. The fully prefabricated assembled double-column high pier device according to claim 1, characterized in that: The lower part of the upper segment (11) of the pier, the upper part of the lower segment (1) of the pier, and both ends of the middle segment (10) of the pier with tie beam are provided with circular steel plates (7). The steel plates (7) are provided with grooves on the outside. The connection of the pier segments is achieved by connecting the steel plates (7) of the two pier segments together and then circumferentially welding them in the grooves.

4. The fully prefabricated assembled double-column high pier device according to claim 1, characterized in that: The top of the cap beam (13) is provided with grouting holes (12), preferably five, one of which has the center of the grouting hole (12) coinciding with the center of the socket hole (14), and the other four grouting holes (12) are arranged circumferentially above the gap (3) between the socket section (9) and the socket hole (14) on the upper segment of the pier column, connecting the top surface of the cap beam (13) and the socket hole (14).

5. The fully prefabricated assembled double-column high pier device according to claim 1, characterized in that: The diameter of the circular steel plate (7) is the same as that of the non-supplied section of the pier column, and a through hole is reserved on the surface. The plane position of the center of the hole is the same as the plane position of the center of the longitudinal reinforcement of the pier column.

6. The fully prefabricated assembled double-column high pier device according to claim 5, characterized in that: The diameter of the hole is 1.2 times the diameter of the longitudinal reinforcement (2) of the pier column on the side where the longitudinal reinforcement (2) of the pier column enters the steel plate, and expands outward at a 45° angle to the thickness direction of the steel plate (7) until the other side of the steel plate.

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