1、 毕毕 业业 论论 文文 题题 目：目： 水准测量在桥梁预压中的应用水准测量在桥梁预压中的应用 English Title：Level measurement in bridge pre fracturing 二二 零零 一一 二二 年年 六六 月月 摘摘 要要 为了能及时发现桥梁梁板安装在施工过程中以及竣工后存在的常规弹性变量 所带来的隐患，通常通过预压来解决其问题。现在通常采用袋装砂石料或钢材作为 荷载进行预压，并按施工设计荷载的 1.2 倍进行最终试压。为检验现浇箱梁模板的 安全性和实际弹性变形量，可通过预压消除结构非弹性变形和提前测试桥梁构件安 全系数。本文主要论述利用水准测量原理，先
2、布设预压所需水准导线，然后在装载 中再逐次加载梁体设计荷载的 30%，100%，120%，并逐次进行沉降变形观测，记录 其相应的标高，并于加载 120%后连续测量其七天内相应的标高，测出稳定后的模板 标高，即可卸载，卸载后测量人员再次对布置点进行测量，得出模板标高，最后根 据此沉降量及回弹量调整相应模板标高。利用该方法可提前发现支架结构及构件加 工、安装所存在的问题和隐患，提前调整，防患于未然。 关键词：关键词：水准测量； 桥梁预压； S114 大桥 ABSTRACT In order to timely detection of bridge plate installed during c
3、onstruction and after the completion of existing conventional elastic variable brings hidden trouble, usually by preloading to solve their problems. Now usually used sand stone or steel as a load precompression, and according to the construction design load is 1.2times of the final pressure test. Fo
4、r inspection of cast-in-place box girder model safety and the actual amount of elastic deformation, can be achieved by preloading elimination structure of non elastic deformation and early testing bridge safety coefficient. This paper mainly discusses the use of the principle of leveling, first laying preloading the level required to traverse, and then in the loading of successive load beam design load is 30%,100%,120%, and by means of settlement deformation observation, recording
