US 12,234,657 B2
TRE assemble permanent column formwork and manufacturing method thereof
Shiping Yin, Xuzhou (CN); Zhangtao Peng, Xuzhou (CN); Xiuxian Li, Xuzhou (CN); Yuntao Hua, Xuzhou (CN); Xudong Ren, Xuzhou (CN); Yingde Zhao, Xuzhou (CN); Haofeng Long, Xuzhou (CN); and Haonan Cong, Xuzhou (CN)
Assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Xuzhou (CN)
Appl. No. 17/435,029
Filed by CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Xuzhou (CN)
PCT Filed Sep. 29, 2020, PCT No. PCT/CN2020/118604
§ 371(c)(1), (2) Date Aug. 30, 2021,
PCT Pub. No. WO2021/212750, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 202010317159.1 (CN), filed on Apr. 21, 2020.
Prior Publication US 2022/0325542 A1, Oct. 13, 2022
Int. Cl. E04G 13/02 (2006.01); B28B 11/24 (2006.01)
CPC E04G 13/021 (2013.01) [B28B 11/245 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A TRE assemble permanent column formwork, comprising first panels (1), second panels (2), circumferential bolts (4), longitudinal bolts (5), nuts and gaskets, wherein the first panels (1) are used for assembling the column formwork at the two ends of a column, the second panels (2) are used for assembling the column formwork in the middle section of the column, the panels are provided with preformed bolt holes (3) at assembling positions, and the bolt holes among the panels are corresponding to each other; the first panel (1) and the second panel (2) are in an arc shape respectively; the first panel (1) has a circular sector-shaped flat surface at the top end, a bottom end of the first panel (1) is provided with a boss, a left end of the first panel (1) is provided with a circumferential boss, and a right end of the first panel (1) is provided with a groove to be fitted with the circumferential boss; the second panel (2) has a groove at the top end and at the bottom end respectively to be fitted with the boss at the bottom end of the first panel (1), a left end of the second panel (2) is provided with a circumferential boss, and a right end of the second panel (2) is provided with a groove to be fitted with the circumferential boss; both the circumferential bolt (4) and the longitudinal bolt (5) comprise bolt heads and bolt rods at head end and at the tail end wherein the bolt rod of the circumferential bolt (4) is arc, while the bolt rod of the longitudinal bolt (5) is straight; the shape of the bolt head is a solid body formed by two semi-ellipsoidal surfaces angled with respect to each other and curved surfaces between the circumferences of the two semi-ellipsoidal surfaces; the major axes of the two semi-ellipsoidal surfaces are different from each other, the two ends of the bolt head have male threads, the semi-ellipsoidal surface of the bolt head with a shorter major axis is provided with female threads at the center, the bolt rod is connected with the bolt heads through threads, and the shape of the bolt holes is a groove to be fitted with the bolt head; the first panel (1) and the second panel (2) are manufactured from an engineered cementitious composite ECC and a woven fabric net (6), the woven fabric net (6) is arranged at the central part of the panel.