【作者】 黄祚继；

【导师】 顾冲时； 吴太平；

【作者基本信息】 河海大学 ， 水利水电工程， 2005， 硕士

【摘要】 水工混凝土建筑物的裂缝,不仅会影响工程外观和正常运行,还可能影响工程安全,缩短工程寿命,防止水工混凝土建筑物产生裂缝,历来是水工建筑物设计和施工的重大课题,由于水工混凝土裂缝大部分属于温度裂缝,温度控制防裂成为解决问题的关键,本文结合该问题进行了深入的研究,主要内容如下:1、 研究了混凝土工程发展的历程,分析了存在的问题,并重点对混凝土添加剂的作用进行了探讨,分析了多种添加剂的性能以及对防止混凝土裂缝产生的效应。2、 分析了产生温度应力的条件,研究了混凝土抗裂性能,并从混凝土裂缝形成和发展机理方面,分析了裂缝对水工建筑物的危害性。3、 临淮岗船闸工程,通过试验,研究了粉煤灰及外加剂的性能,对混凝土的配合比进行设计,并对底板混凝土的温度裂缝进行了验算分析。4、 对临淮岗船闸底板混凝土的温度观测资料进行了分析,据此研究了混凝土温度变化对船闸底板混凝土应力的影响,提出了温度控制的措施。更多还原

【Abstract】 The cracks of hydraulic concrete structure influence not only the semblance and normal operation of the structure, but also the safe operation of the project. They can also shorten the lifespan of project. Preventing or reducing cracks, is always an important subject in design and construction of hydraulic structure. Because most of the cracks of hydraulic structure belong to temperature crack, preventing temperature crack as the key of problem is studied deeply in the issues. The primary coverage of this issue is represented as following:1 The developing process of concrete project is studied, problems existed are analyzed and the function of addictive is focused on to research, the performance of kinds of addictive and the effect of preventing concrete cracks is analyzed.2 The condition of producing temperature stress, the function of concrete’s anti-crack is analyzed, and the harmfulness of crack to hydraulic structure is also analyzed from the.aspects of the formation and the developing mechanics of concrete dam.3 In combination with Linhuaigang lock project and test, the function of flyash and addictive is analyzed, the concrete proportioning is designed and the temperature crack of soleplate is checked.4 According to the observation data of the soleplate of Linhuaigang lock, the influence of temperature variation on concrete stress of soleplate is studied, and then the temperature control measure is proposed.更多还原