II
江苏大学硕士学位论文
Abstract
The bridge structure durability is a key factor affecting the life of bridge its safety and structure, the early damage of the upper structure such as deflection, cracking and other destroys and bridge accidents are increasingly concerned by the domestic transportation industies. The investigation and detection showed that large prestressed bridge and prestressed concrete bridge quality problems mainly come from the substandard prestressing construction technology and lacking of effective grouting quality control method. The establish effective prestress are ment of directly connected with the bridge reliability safety and its life. How to improve the prestressed construction technology, and how to effectively control the prestressed bridge, have become an important problem to be urgently resolved. This paper carried out the research work in the following three aspects: The first one is the basic theory for prestressed concrete structures and prestressed intelligent tensioning system practical application of the process was studied, emphatically discussing the intelligent leverage theory, and pointing out that the current real situation of traditional tensioning construction technology, and related problems among them. The advantage of the intelligent tension system implementation is fited. The second one is studying of the prestressed intelligent grouting system and its application, mainly including the slurry process, working principle and the main functions and characteristics of pressure prestressed intelligent bridge. Through the analysis of the technology innovation, the necessity of improving the traditional grouting system is ststed. The third is the intelligent tension and grouting technology are empirically assessed and its actual application effect is wholely tested and verified. Based on the clear traditional process defects, the prestress intelligent tensioning system and intelligent grouting systemare put forward. The prestressed intelligent tension system overcomes those disadvant ages such as: the comb compiling technology in traditional tensioning process through beam process is relatively rough; tension control error is too large; the stietch-draw elongation value is inauurate The new system’s advantages and advanced furctions are that it can win the applied stress, check elongation timely and it is convenient to realize the "double control" and symmetrical and synchronous tension; easy to correct the tension process and to reduce prestress loss.The intelligent grouting system overcomes the disadvantages of the traditional process of sealing anchor .The former anchor plate installation is non-standard and the fluidity is uncontrollable.The voltage stabilizing time is not enough.The software system can only be used to control the grouting process Its advantages are accurate pressure control, flow regulation, accurate control of water binder ratio, high integration,
分类号 UDC
U445.57 624.21/.8
密级 公 开 编号 10299G102203
工 程 硕 士 学 位 论 文 预应力智能张拉及智能压浆工艺 在桥梁施工中的应用研究
Prestressed intelligent tensioning and intelligent grouting technology Application in bridge construction
I
江苏大学硕士学位论文
桥梁预应力采用智能张拉和智能压浆施工技术， 改变了传统的张拉压浆工艺， 严格控制预应力张拉的精度和管道压浆的密实度，对提高预应力混凝土的施工质 量，提高桥梁结构的耐久性和使用寿命、降低桥梁的寿命周期成本具有重大现实 意义。 关键词：预应力桥梁；智能张拉；智能压浆；桥梁质量、桥梁安全
万 孝 军
指导教师 刘 荣 桂 硕士 2014.04 教授 刘 工程领域 江苏大学 答辩委员会主席 评阅人 林 高工 2014.06.11 2014.06 陆建飞 申请学位级别 论文提交日期 建筑与土木工程
论文答辩日期
学位授予单位和日期
学位论文版权使用授权书
本学位论文作者完全了解学校有关保留、使用学位论文的规定， 同意学校保留并向国家有关部门或机构送交论文的复印件和电子版， 允许论文被查阅和借阅。本人授权江苏大学可以将本学位论文的全部 内容或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫 描等复制手段保存和汇编本学位论文。
学位论文作者签名：
日期：
年
月
江苏大学硕士学位论文
摘
要
桥梁结构耐久性是影响桥梁安全、结构寿命的关键因素，上部结构的提前损 坏如出现早期下挠、开裂等病害和桥梁安全事故发生是国内交通行业日益关注的 问题。大量预应力桥梁调查和检测表明，预应力桥梁质量隐患主要来源于预应力 张拉施工工艺不规范和缺乏有效的压浆质量控制手段，有效预应力的建立直接关 系桥梁安全性、可靠性和使用寿命。如何改进预应力施工技术，如何对桥梁预应 力进行有效控制，已经成为亟待解决的重要问题。 本文主要开展了以下三个方面的研究工作： 一是对预应力混凝土结构的基本理论和预应力智能张拉系统实际应用的过程 进行了研究，着重论述了智能杠杆理论，并指出了目前传统张拉施工工艺现实状 况，以及其中存在的相关问题，对智能张拉系统系统实施的优势进行定位； 二是对预应力智能压浆系统及其应用进行了研究，主要包括了桥梁预应力智 能压浆技术工艺流程、工作原理以及主要功能与特点，通过对技术创新的分析， 阐述了对传统压浆系统进行改进的必要性； 三是重点对智能张拉以及压浆技术进行了实证分析，对其实际的应用效果进 行全面的检验和验证。本文在明了传统工艺不足的基础上，提出了预应力智能张 拉系统和智能压浆系统：预应力智能张拉系统克服了传统张拉工艺中梳编穿束工 艺比较粗糙、张拉力控制误差过大、张拉伸长值测量不准确的弊端，具有能赢取 施加应力，及时校核伸长量，便于实现“双控”及对称同步张拉，易于规范张拉 过程、减少预应力损失等先进的功能和优点；智能压浆系统克服了传统工艺中封 锚及锚垫板安装不规范、流动度不可控、稳压时间不足等缺点，同时提出的利用 软件系统智能控制压浆过程，其具有准确控制压力、调节流量，准确控制水胶比， 系统集成度高，简单实用等功能和优点。 工程实践表明，在智能张拉系统的工作过程中，其张拉均衡稳定，未出现断 丝、滑丝现象，张拉控制应力良好，极好地达到了“双控”和同步张拉的规范要 求；进一步的测量结果表明，张拉的伸长值偏差在 2.6%～3.5%之间，基本为正偏 差，这说明预应力度得到了有效保证。智能压浆的过程也能有效保证管道浆液内 的元气室、气仓，管道内浆液的密实，在对浆液的水胶比、灌浆压力和浆液流量 进行严格控制的基础上，能够有效保证灌浆质量。