CN-224213102-U - Segmental assembled bridge pier capping beam

Abstract

The utility model belongs to the technical field of bridge construction, and particularly relates to a segmental assembled pier capping beam. The bent cap is formed by splicing a left prefabricated bent cap section and a right prefabricated bent cap section along the length direction through a bracket type seam, the bracket type seam comprises a bracket supporting point extending out of the lower part of the splicing side of the left bent cap section and a cantilever structure extending out of the upper part of the splicing side of the right bent cap section, two vertical splicing surfaces and one horizontal splicing surface are formed, epoxy adhesive is coated on the splicing surfaces of the left bent cap section and the right bent cap section, corresponding reserved holes are formed in the two sections, and a continuous prestress rib channel is formed after splicing. The workload of the installation construction site of the bent cap is small, the installation procedure is simple, convenient and quick, a bracket and a template are not required to be erected, and the construction safety is improved.

Inventors

• GAN HONG
• ZHANG QING
• XU YANGFU
• WU FEI
• ZHU LINSHENG
• LI YONGGU
• TAN ZHICHENG
• QI TIAN
• XIONG HUA
• ZHANG WEI
• WANG ZHIWU
• WEI HAITAO
• He Chaofa
• CHEN YONG
• XU ZHOU
• XIONG MIN
• Lai Qinhui
• HUANG BAISHENG
• LI GUOQING
• QIU WEI

Assignees

• 江西赣粤高速公路股份有限公司
• 上海市政预制技术开发有限公司
• 江西省交通设计研究院有限责任公司
• 江西省交通工程集团有限公司

Dates

Publication Date

20260508

Application Date

20250430

Claims (4)

1. 1. A segmental assembled bridge pier bent cap is characterized in that a left prefabricated bent cap section (1) and a right prefabricated bent cap section (2) are spliced through a bracket type joint (3) along the length direction of the bent cap, the bracket type joint (3) comprises a bracket fulcrum extending out of the lower portion of the splicing side of the left bent cap section (1) and a cantilever structure extending out of the upper portion of the splicing side of the right bent cap section (2), two vertical splicing surfaces and one horizontal splicing surface are formed, epoxy adhesive is coated on the splicing surfaces of the left bent cap section (1) and the right bent cap section (2), corresponding reserved holes are formed in the two sections, and a continuous prestressed rib channel (12) is formed after splicing.
2. 2. The segment-assembled bridge pier capping beam according to claim 1, wherein the connection node of the capping beam left segment (1) and the pier column (4) comprises a vertical steel bar grouting corrugated steel pipe (5) pre-buried in the capping beam left segment (1) and a pre-buried main rib (6) extending from the top of the pier column (4), the pre-buried main rib (6) is inserted into the steel bar grouting corrugated steel pipe (5), the connection node of the capping beam right segment (2) and the pier column (4) comprises a vertical steel bar grouting corrugated steel pipe (5) pre-buried in the capping beam right segment (2) and a pre-buried steel bar grouting sleeve (7) at the top of the pier column (4), and the post-insertion main rib (11) is inserted into the steel bar grouting sleeve (7).
3. 3. The segment-fitted pier capping beam according to claim 1, wherein the tendon channels (12) are internally fitted with tendons for applying permanent prestressing to form the capping beam into a unitary structure.
4. 4. The segmental assembled bridge pier capping beam according to claim 1, wherein temporary anchor blocks (8) are arranged on the upper sides of the left and right segmental prefabricated capping beams, the joint surfaces of the bracket type joints (3) are tightly attached through horizontal temporary prestress, and the temporary prestress is applied through the temporary anchor blocks (8) and jack (9) tensioning prestress steel bars (10).

Description

Segmental assembled bridge pier capping beam Technical Field The utility model belongs to the technical field of bridge construction, and particularly relates to a segmental assembled pier capping beam. Background The fully prefabricated assembled bridge is rapidly popularized in the engineering world due to the advantages of high construction speed, good engineering quality, labor saving, traffic and environmental impact reduction and the like. But the weight of the bent cap in the lower structure is large compared with the upper structure of the bridge, which causes great difficulty in transportation and hoisting. The weight of the bent cap has two directions, namely, 1. The weight of the member is reduced by the member being segmented or segmented, and 2. The weight of the member is reduced by adopting a new structure or a new material. After the components are segmented or sliced, the size and the weight are reduced, and the transportation and hoisting difficulties can be reduced. At present, the method is generally adopted in domestic prefabrication projects. The bent cap segmentation is a bent cap lightweight method which is preferred by engineers at present, and generally has two modes, namely a joint in a bent cap span, and can be used for two situations of larger and smaller column spacing, and a joint on a bent cap cantilever arm at the outer side of a column, and is suitable for the situation of smaller column spacing. For the bent cap with cast-in-place seams in the midspan, the common practice is that after the bent cap is connected with the upright post through a sleeve or a grouting corrugated pipe, a wider cast-in-place seam is reserved in the midspan, and the steel bars passing through the seam are connected in a welding mode. However, the connection mode has larger field workload and troublesome construction. If the reliable and efficient segment assembled bent cap can be provided, a bracket and a template are not required to be erected, the construction is more convenient, and the popularization of the assembled bent cap is facilitated. Disclosure of utility model In view of the above, an object of the present utility model is to provide a segment-assembled pier capping beam. The capping beam has the advantages of small workload of the installation construction site, simple and quick installation procedure, no need of erecting a bracket and a template, and high construction safety. In order to achieve the above purpose, the utility model is realized by the following technical scheme: The bridge pier bent cap with the assembled sections is formed by splicing a left prefabricated bent cap section and a right prefabricated bent cap section along the length direction through bracket type joints, wherein each bracket type joint comprises a bracket fulcrum extending out of the lower part of the splicing side of the left bent cap section and a cantilever structure extending out of the upper part of the splicing side of the right bent cap section, two vertical splicing surfaces and one horizontal splicing surface are formed, epoxy adhesive is coated on the splicing surfaces of the left bent cap section and the right bent cap section, corresponding reserved holes are formed in the two sections, and a continuous prestressed rib channel is formed after splicing. Further, the connection node of the left section of the capping beam and the pier column comprises a vertical steel bar grouting corrugated steel pipe pre-buried in the left section of the capping beam and a pre-buried main rib extending out of the top of the pier column, the pre-buried main rib is inserted into the steel bar grouting corrugated steel pipe, the connection node of the right section of the capping beam and the pier column comprises a vertical steel bar grouting corrugated steel pipe pre-buried in the right section of the capping beam and a pre-buried steel bar grouting sleeve at the top of the pier column, and the main rib is inserted after the steel bar grouting sleeve is inserted. Furthermore, the prestressing tendons are arranged in the prestressing tendon channels and are used for applying permanent prestressing force so that the bent cap forms an integral structure. Further, temporary anchor blocks are arranged on the upper sides of the left section and the right section of the prefabricated bent cap, the joint surfaces of the bracket type joints are tightly attached through horizontal temporary prestress, and the temporary prestress is applied through the temporary anchor blocks and jack tensioning prestress steel bars. Correspondingly, the utility model also provides a method for installing the segmental assembled pier capping beam, which comprises the following steps of: A. Installing a left section of the capping beam, and sleeving a pre-buried main rib extending out of the top of the pier column into a pre-buried steel bar grouting corrugated steel pipe of the left section of the capping beam; B. Cleaning the splicin