Title:
SUPER-LONG PRESTRESSING STEEL TENDON CONSTRUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/029647
Kind Code:
A1
Abstract:
A super-long prestressing steel tendon construction method, comprising the following steps: prestressing duct positioning and installation; top-surface prestressing steel tendon threading; top-surface prestress tensioning; top-surface prestressing tendon duct grouting; and top-surface prestress anchorage sealing. By using a construction method of "a traction cable being pulled by means of a mechanical method to perform whole-hole threading; performing cable threading, tensioning, and grouting by using reserved hole positions; and adding tensioning and anchorage sealing notches at tensioning ports", the problems of having limited space, being time-consuming and labor-consuming, steel strands tending to damage a hole wall, the grouting not being full, and the anchorage sealing construction being difficult during the construction of a top-surface super-long prestressing steel tendon are solved.
Inventors:
LIU WENSHENG (CN)
ZHANG ZHIGUO (CN)
LI FENGCHENG (CN)
FENG CHAO (CN)
WANG GAOPING (CN)
CHEN ZHAOPO (CN)
SHANG YAXIN (CN)
SU LI (CN)
MIN KUN (CN)
XIE LEI (CN)
CHEN YUNMING (CN)
ZHANG ZHIGUO (CN)
LI FENGCHENG (CN)
FENG CHAO (CN)
WANG GAOPING (CN)
CHEN ZHAOPO (CN)
SHANG YAXIN (CN)
SU LI (CN)
MIN KUN (CN)
XIE LEI (CN)
CHEN YUNMING (CN)
Application Number:
PCT/CN2022/098283
Publication Date:
March 09, 2023
Filing Date:
June 11, 2022
Export Citation:
Assignee:
CHINA RAILWAY BEIJING ENG BUREAU GROUP NO 2 ENG CO LTD (CN)
International Classes:
E01D21/00
Domestic Patent References:
| WO2011005049A2 | 2011-01-13 |
Foreign References:
| CN113585091A | 2021-11-02 | |||
| CN110453603A | 2019-11-15 |
Other References:
"Master’s Dissertation", 22 December 2010, SOUTHEAST UNIVERSITY, CN, article LIU, FANGZHEN: "Research on Construction Technology of Sutong Bridge with 268m Continuous Rigid Frame Main Span", pages: 1 - 114, XP009544147
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