CONSTRUCTION METHOD FOR ULTRA-LONG PRE-STRESSED STEEL BUNDLE

• Main Authors: WANG GAO PING, MIN KUN, SHANG YAXIN, FENG CHAO, CHEN YUNMING, LI FENGCHENG, XIE LEI, ZHANG ZHI GUO, SU LI, LIU WENSHENG, CHEN ZHAO BO
• Format: Patent
• Language: English; Japanese
• Published: 14.03.2023
• Subjects: ASSEMBLY OF BRIDGES; BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; OR VIADUCTS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING

To solve the problem that although a large part of a pre-stressed steel twist yarn in an existing construction method is provided in a vertical surface and a bottom surface, an artificial beam is usually adopted, a maximum length of the artificial beam is generally within 70 m, it is a large technique difficulty how to save time and labor and realize ultra-long pre-stressed bundle, tension, slurry and anchor sealing for an ultra-long pre-stressed steel bundle having a top face thin layer structure.SOLUTION: A construction method for an ultra-long pre-stressed steel bundle includes the steps of: positioning and assembling a pre-stressed tube; inserting an upper face pre-stressed steel bundle; pre-stressing and tensing the upper face; mortar-pressing an upper face pre-stressed bundle tube; and pre-stressing and anchor-embedding the upper face. Mechanical means can be adopted in place of artificial means. Power is provided by an insertion machine, a steel drawn line is penetrated, and efficiency is improved.SELECTED DRAWING: Figure 1 【課題】既存の施工法におけるプレストレスト鋼撚糸の大部分は立面と底面に配置され、通常は人工ビームを採用し、人工ビームの最大長は一般的に70m以内である。しかし、頂面薄層構造の超長プレストレスト鋼束に対して、どのように時間と省力を節約して超長プレストレスト束、張力、スラリー、アンカー封じの実現を確保するかは大きな技術難点である。【解決手段】超長予応力鋼製束の施工方法は、予応力管道のポジショニングと組立するステップと、上面予応力鋼製束を挿通させるステップと、上面予応力緊張させるステップと、上面予応力束管道のモルタルプレスするステップと、上面予応力アンカー埋込みするステップと、を含む。人工に代えて機械手段を採用できる。挿通機により動力を提供して鋼絞線の貫設を実現し、効率を向上する。【選択図】図１