当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2015年
5期
1149-1151
,共3页
蓝晓民%王盛智%王国维%兰天
藍曉民%王盛智%王國維%蘭天
람효민%왕성지%왕국유%란천
固定墩%预应力%地下管道
固定墩%預應力%地下管道
고정돈%예응력%지하관도
Fixed pier%Prestressed%Underground pipeline
地下管道的轴向力对管道系统的危害较大,产生的轴向应变会对管道系统造成破坏,减小这一影响的方法是采用固定墩,但固定墩的体积往往很大,增加了管道系统的成本和施工难度。以往对于解决地下管道固定墩体积过大问题的通用方法是借助地基原状土的抗力,将支墩设计成异型支墩,但这种方法对于土质情况的准确把握较困难,同时现场地质条件制约的因素较大,计算起来也较复杂。提出预应力处理法,通过对管道的预处理,达到减小管道轴向力和倾覆力矩的影响,实现科学、简便施工设计的目的。
地下管道的軸嚮力對管道繫統的危害較大,產生的軸嚮應變會對管道繫統造成破壞,減小這一影響的方法是採用固定墩,但固定墩的體積往往很大,增加瞭管道繫統的成本和施工難度。以往對于解決地下管道固定墩體積過大問題的通用方法是藉助地基原狀土的抗力,將支墩設計成異型支墩,但這種方法對于土質情況的準確把握較睏難,同時現場地質條件製約的因素較大,計算起來也較複雜。提齣預應力處理法,通過對管道的預處理,達到減小管道軸嚮力和傾覆力矩的影響,實現科學、簡便施工設計的目的。
지하관도적축향력대관도계통적위해교대,산생적축향응변회대관도계통조성파배,감소저일영향적방법시채용고정돈,단고정돈적체적왕왕흔대,증가료관도계통적성본화시공난도。이왕대우해결지하관도고정돈체적과대문제적통용방법시차조지기원상토적항력,장지돈설계성이형지돈,단저충방법대우토질정황적준학파악교곤난,동시현장지질조건제약적인소교대,계산기래야교복잡。제출예응력처리법,통과대관도적예처리,체도감소관도축향력화경복력구적영향,실현과학、간편시공설계적목적。
Underground pipeline axial force has big harm to the pipe system, produced axial strain will damage the piping system. The method to reduce the influence is to adopt the fixed piers, but the volume of a fixed pier is often large, building the pier will increase the cost of the pipeline system and construction difficulty. In the past, in order to solve the problem that underground pipe fixed block size is too large, common method is to design special-shaped piers with the help of the undisturbed soil resistance, but this method asks an accurate grasp of the soil conditions, which is more difficult, at the same time the field geological conditions have larger restraint on the method, and the calculation is relatively complex. In this paper, prestressed treatment method was put forward. After the pretreatment of the pipeline, the effect of axial force and overturning moment can be decreased to realize the objective of scientific and simple construction design.