单桩承载力地理信息系统应用研究

【作者】 郝猷猷；

【导师】 黄强；

【作者基本信息】 中国建筑科学研究院 ， 岩土工程， 2004， 硕士

【摘要】 本文首先建立了单桩承载力数据库，包括静载试验数据库、计算参数库、计算结果库等子库，采用目前通用的Microsoft Access关系型数据库，并且在此基础上建立了单桩承载力地理信息系统。该系统是一个以单桩静载试验数据及相关数据为主要管理对象的应用型地理信息系统，其最大的特点是能够快速提供实时性强、真实准确的单桩的各种信息，克服了以往信息管理系统软件的单纯数据库管理功能，实现了图形库与数据库综合管理，并集成了强大的地理分析与查询功能，为桩基础管理、设计、施工等提供可靠的依据。 其次，利用单桩承载力地理信息系统详细分析了肇庆市971根工程试桩的静载试验曲线，进一步了解了荷载—位移曲线的变形趋势以及嵌岩桩的承载性状。利用灰色系统理论的方法从已经获得的试桩的Q～s曲线中进一步分析单桩承载力性状。 最后，根据971根工程试桩的静载试验数据的统计分析结果，对肇庆市使用经验参数法计算单桩极限承载力提出了以下建议：桩的极限侧阻力q_sik、端阻力q_pk标准值，尤其是桩端岩石的端阻力标准值q_pk的取值。使得用经验参数法计算出的承载力值较传统计算方法更能反映实际的单桩承载力，有利于肇庆市单桩承载力设计水平的提高。更多还原

【Abstract】 Firstly the database of bearing capacity of single pile is established in the paper including the database of static test, calculating parameter , calculating result and so forth, which adopts the interrelated-type database of Microsoft Access used universally in the world. And what’s more, Geographical Information System of bearing capacity of single piles is set up on this foundation. This system is an applicable geographical information system that regards static test data of single piles and related as main managing objective. As a result, the merit of this system is the case it could quickly offer all kinds of information about static test on piles very exactly and actually at the real-time. It is different from other system whose management is just for database, and it could also offer comprehensive management between graph-base and database too. The system could offer reliable data on management, design and construction of pile foundation through powerful function of geographical analysis and query.Secondly, the paper analyses load-displacement curve on 971 test piles in Zhaoqing by using this system, and the paper further studies on the deformation trend of load-displacement curve and load-bearing character of rock-socketed piles. Then, the paper further studies on the character of bearing capacity of single piles by using Grey System Theory.Finally, according to the result of static loading test data of 971 piles in Zhaoqing, the paper gives some suggestions to calculate ultimate carrying capacity of single pile by empirical formula, such as the limit value of side friction of soil along the pile shaft and the end bearing, especially the end bearing by the rock at the bottom. The result is the closest pile capacity compared with the tradition method, and it is propitious to increase the design level of pile capacity.更多还原