基于现场旋切触探的岩体力学参数及工程岩体分级研究

发布时间：2018-04-25 00:29

本文选题：旋切触探 + 弹性模量　；参考：《西安理工大学》2017年硕士论文

【摘要】：岩体力学参数的重要性不言而喻,准确、快速的获取岩体力学参数有助于岩体工程更快、更好设计施工。本文利用李宁教授课题组研制的XCY-1型岩体力学参数旋切触探仪,通过现场旋切触探实验及理论分析,揭示岩体旋切钻进过程中能量特性,基于旋切钻进过程中能量守恒,提出了XCY-1型岩体力学参数旋切触探仪的弹性模量计算方法和确定工程岩体分级的方法,并通过大量的现场试验数据来验证此方法的正确性。结合实际工程勘察资料和规范资料,确定了适用于XCY-1型旋切仪的弹性模量计算公式和围岩分级的适用条件。本文的具体研究内容及成果如下:首先,归纳总结了静力触探的发展史,然后在西安理工大学李宁、刘奉银等室内试验和理论研究基础上,参与设计研发了适应于岩体的XCY-1型岩体力学参数旋切触探仪。验证了XCY-1型岩体力学参数旋切触探仪在现场应用的合理性和准确性。其次,基于功的原理和能量守恒的思想,推导出适用于XCY-1型岩体力学参数旋切触探仪的弹性模量计算方法,并给出了适用条件。通过现场试验验证得出三级围岩弹性模量为6-16GPa,与规范弹性模量6-16GPa相比较是合理的。基于旋切触探技术和工程岩体分级规范,提出了利用钻速和弹性模量相结合的方法来确定工程岩体分级。通过大量的现场旋切试验,假定在旋切触探的钻压、扭矩和转数一定的情况下,预测钻速0-0.2mm/s,弹性模量E大于33GPa,预测为工程岩体分级是一级;钻速0.2mm/s-0.5mm/s,弹性模量16GPa-33GPa,则工程岩体分级是二级;钻速0.5mm/s-1.0mm/s,弹性模量6GPa-16GPa,则工程岩体分级是三级;钻速1.0mm/s以上,弹性模量小于6GPa,则工程岩体分级是四级及以上。最后,编写了BP神经网络程序,实现了对实验数据的管理,并实现了试验范围内的数据预测。
[Abstract]:The importance of mechanical parameters of rock mass is self-evident. Accurate and rapid acquisition of mechanical parameters of rock mass is helpful for faster design and construction of rock mass engineering. In this paper, the XCY-1 type rotary penetration tester for rock mass mechanical parameters developed by Professor Li Ning is used to reveal the energy characteristics of rock mass rotary drilling process through field experiments and theoretical analysis, based on the conservation of energy during rotary drilling. The calculation method of elastic modulus of XCY-1 type rock mass mechanical parameter rotary penetration detector and the method of determining the classification of engineering rock mass are put forward, and the correctness of this method is verified by a large number of field test data. Based on the actual engineering survey data and the code data, the formula for calculating elastic modulus and the applicable conditions for the classification of surrounding rock are determined. The specific research contents and results are as follows: firstly, the history of static penetration is summarized, and then based on the laboratory experiments and theoretical studies, such as Li Ning and Liu Fengyin of Xi'an University of Science and Technology, Participate in the design and development of XCY-1 type rock mass mechanical parameters rotary penetration detector suitable for rock mass. The rationality and accuracy of the application of XCY-1 type rock mass mechanical parameter rotary penetration detector in the field are verified. Secondly, based on the principle of work and the idea of conservation of energy, the calculation method of elastic modulus suitable for XCY-1 type rock mass mechanical parameter rotary penetration detector is derived, and the applicable conditions are given. Field tests show that the elastic modulus of the third grade surrounding rock is 6-16 GPA, which is reasonable compared with the standard elastic modulus 6-16GPa. Based on the rotary penetration detection technique and the engineering rock mass classification code, a method combining drilling speed and elastic modulus is proposed to determine the engineering rock mass classification. Through a large number of field tests, it is assumed that the predicted drilling speed is 0-0.2mm / s, the elastic modulus E is greater than 33GPa, and the engineering rock mass classification is the first grade, assuming that the drilling speed is 0-0.2mm / s under the condition of constant drilling pressure, torque and rotation number of the rotary penetration probe. If the drilling speed is 0.2mm / s-0.5mm / s, the elastic modulus is 16GPa-33GPa, then the engineering rock mass classification is second-order; the drilling rate 0.5mm / s-1.0mm / s, the elastic modulus 6GPa-16GPa-grade is three grade; the drilling speed 1.0mm/s is higher than 6GPaand the elastic modulus is less than 6GPa. then the engineering rock mass classification is grade four and above. Finally, a BP neural network program is developed to manage the experimental data and predict the experimental data.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU45

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