静力触探技术在水坠坝质量检测中的应用
发布时间：2019-03-23 19:37
【摘要】：水坠法修筑淤地坝技术近年来得到了广泛的应用和推广,但对于成型的水坠坝缺乏系统和科学的质量检测方法。本研究以陕西省延安市志丹县前拐沟淤地坝为研究对象,运用静力触探技术,通过对边埂碾压层、坝顶碾压层、水坠冲填层的静力触探数据分析,初步检测、评价其质量;借助SURFER软件的优势,快速绘制比贯入阻力等值线图,方便对静力触探试验冗繁的数据量进行处理和分析,准确、清楚的呈现坝体不同位置强度的大小,并借此分析水坠坝工程质量;建立中粉质壤土所筑水坠坝含水率与静力触探比贯入阻力之间的相关关系,用以对坝体流态区位置的推求,方便静力触探技术探求水坠坝流态区位置这一新技术的应用与推广;将该水坠坝质量检测方法与传统方法相结合,希望形成一套完整的、科学的、系统的、贯穿施工期和运营期的水坠坝质量检测方法。本论文得出的主要结论如下:(1)筑坝土料的颗粒分析试验和界限含水率试验结果表明:根据《土工试验规程》(SL237-1999)中相关规定,该筑坝土料属低液限粘土(CL)。根据《水坠坝技术规范》(SL302-2004)中相关规定,该筑坝土料属中粉质壤土。(2)通过对坝坡碾压层比贯入阻力值变化规律的分析,说明施工过程中边坡修整和碾压法现行施工工艺对边埂碾压层质量有一定影响,具体表现为边埂碾压层的外侧强度较小,在恶劣天气的影响下,易出现裂缝、沉陷等现象;通过对坝顶碾压层比贯入阻力值变化规律的分析,我们可以确定碾压施工时,单次碾压的填土厚度及碾压质量;水坠冲填层比贯入阻力值的分析主要是对水坠冲填体均匀程度的分析,我们引入变异系数(CV)作为其定量描述的指标,从该角度为水坠冲填层质量进行分析。(3)含水率与比贯入阻力值之间呈现幂函数关系,相关性达到了极显著水平,二者的拟合方程为:y=0.018x-2.72(其中y为比贯入阻力值,x为含水率)。当运用静力触探技术探求水坠坝流态区位置时,可以直接应用《铁路工程地质原位测试规程》中的相关数据,而针对整个水坠冲填体进行研究,宜在该规程数据的基础上,自行建立含水率与比贯入阻力值的相关关系,进而推求对应筑坝土料不同塑性状态的临界比贯入阻力值。(4)借助SURFER软件的优势,快速绘制比贯入阻力等值线图,减轻了图件绘制的工作量。坝体比贯入阻力等值线图的绘制可以方便我们对静力触探试验冗繁的数据量进行处理和分析,可以更加准确、清楚的呈现坝体不同位置强度的大小,方便进行进一步的分析和研究。将静力触探比贯入阻力等值线图中等值线等级作适当调整,填充适宜颜色后,可以针对性的对坝体碾压层和水坠冲填层进行具体分析。针对坝体碾压层绘制的比贯入阻力等值线彩图清楚地呈现出坝体不同位置的碾压层的强度,进而可以分析坝体不同位置碾压层质量,在施工期,可以推测鼓肚、变形、管涌等现象的易发区域,成坝后,可以为坝体的加固提供科学依据。针对水坠冲填层绘制的坝体塑性状态分区图可以清楚地呈现坝体五个塑性状态分区的具体范围,其中,流塑区,即流态区的范围应高度重视,不同时间节点坝体塑性状态分区图可以方便我们对坝体流态区的消散进行形成、发展,以及消散进行分析,进而判断坝体的稳定与安全。
[Abstract]:The construction of the silt dam by the water-drop method has been widely used and promoted in recent years, but it is lack of system and scientific quality detection method for the formed water-drop dam. In this study, a static sounding technique is used to analyze the static contact data of the side-bank rolling layer, the dam crest rolling layer and the water-drop impact-filling layer by using the static sounding technique, and the advantages of the SURFER software are evaluated by using the static sounding technique. It is convenient to process and analyze the data volume of the dead complex of the static sounding test, and the size of different positions of the dam body can be accurately and clearly presented, and the project quality of the water falling dam is analyzed. The relationship between the water content of the dam and the penetration resistance of the dam in the medium silty soil is established, and the application and extension of the new technology for the location of the flow state area of the water fall dam are studied by means of the static sounding technique. The quality detection method of the water drop dam is combined with the traditional method to form a complete, scientific and systematic method for detecting the quality of the water falling dam which runs through the construction period and the operation period. The main conclusions of this paper are as follows: (1) The test of the particle analysis and the limit water content of the dam-building soil material show that the dam-building material belongs to the low-liquid-limit clay (CL) according to the relevant provisions in the Code for Geotechnical Test (SL237-1999). According to the relevant provisions of the Technical Specification for Water-falling Dam (SL302-2004), the dam-building material belongs to the medium silty soil. (2) Through the analysis of the change law of the specific penetration resistance value of the rolling layer of the dam slope, it is indicated that the current construction technology of the side slope trimming and rolling method in the construction process has a certain influence on the quality of the side ridge rolling layer, It is easy to have the phenomena of crack, subsidence and so on. Through the analysis of the change law of the specific penetration resistance value of the rolling layer on the dam crest, we can determine the filling thickness and the rolling quality of the single rolling during the rolling construction. The analysis of the penetration resistance value of the water-drop impact-filling layer is mainly the analysis of the uniform degree of the water-drop filling body, and the coefficient of variation (CV) is introduced as the index of the quantitative description, and the quality of the water falling-filling layer is analyzed from the angle. (3) There is a power function relation between water content and the penetration resistance value, and the correlation has reached a very significant level. The fitting equation of the two is: y = 0.018x-2.72 (where y is the specific penetration resistance value and x is the water content). When a static sounding technique is used to explore the position of the water drop dam, the relevant data of the in-situ test procedure for the engineering geological in-situ test of the railway can be directly applied, The relationship between the water content and the specific penetration resistance is established, and the critical specific penetration resistance value corresponding to the different plastic state of the dam is obtained. (4) With the advantage of the SURFER software, the plot of the specific penetration resistance is quickly drawn, and the workload of the drawing is reduced. The drawing of the contour map of the specific penetration resistance of the dam body can be convenient for us to process and analyze the data volume of the static sounding test, and the size of different positions of the dam body can be more accurately and clearly presented, and further analysis and research can be carried out conveniently. The proper adjustment of the contour level of the static sounding and penetration resistance contour map is made, and after the proper color is filled, the rolling layer of the dam body and the water drop impact layer can be specifically analyzed. The color map of the specific penetration resistance drawn for the rolling layer of the dam body clearly presents the strength of the rolling layer at different positions of the dam body, and further the quality of the rolling layer at different positions of the dam body can be analyzed, And can provide a scientific basis for the reinforcement of the dam body. The specific scope of the five plastic state zones of the dam body can be clearly presented for the plastic state zoning map of the dam body drawn by the water-drop impact-filling layer, wherein the flow-plastic zone, i.e. the range of the flow state area, should be paid great attention, The zoning map of the plastic state of the dam body at different time can be convenient for us to form, develop and analyze the dissipation of the dam body, and then to judge the stability and safety of the dam body.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S157
本文编号：2446160
[Abstract]:The construction of the silt dam by the water-drop method has been widely used and promoted in recent years, but it is lack of system and scientific quality detection method for the formed water-drop dam. In this study, a static sounding technique is used to analyze the static contact data of the side-bank rolling layer, the dam crest rolling layer and the water-drop impact-filling layer by using the static sounding technique, and the advantages of the SURFER software are evaluated by using the static sounding technique. It is convenient to process and analyze the data volume of the dead complex of the static sounding test, and the size of different positions of the dam body can be accurately and clearly presented, and the project quality of the water falling dam is analyzed. The relationship between the water content of the dam and the penetration resistance of the dam in the medium silty soil is established, and the application and extension of the new technology for the location of the flow state area of the water fall dam are studied by means of the static sounding technique. The quality detection method of the water drop dam is combined with the traditional method to form a complete, scientific and systematic method for detecting the quality of the water falling dam which runs through the construction period and the operation period. The main conclusions of this paper are as follows: (1) The test of the particle analysis and the limit water content of the dam-building soil material show that the dam-building material belongs to the low-liquid-limit clay (CL) according to the relevant provisions in the Code for Geotechnical Test (SL237-1999). According to the relevant provisions of the Technical Specification for Water-falling Dam (SL302-2004), the dam-building material belongs to the medium silty soil. (2) Through the analysis of the change law of the specific penetration resistance value of the rolling layer of the dam slope, it is indicated that the current construction technology of the side slope trimming and rolling method in the construction process has a certain influence on the quality of the side ridge rolling layer, It is easy to have the phenomena of crack, subsidence and so on. Through the analysis of the change law of the specific penetration resistance value of the rolling layer on the dam crest, we can determine the filling thickness and the rolling quality of the single rolling during the rolling construction. The analysis of the penetration resistance value of the water-drop impact-filling layer is mainly the analysis of the uniform degree of the water-drop filling body, and the coefficient of variation (CV) is introduced as the index of the quantitative description, and the quality of the water falling-filling layer is analyzed from the angle. (3) There is a power function relation between water content and the penetration resistance value, and the correlation has reached a very significant level. The fitting equation of the two is: y = 0.018x-2.72 (where y is the specific penetration resistance value and x is the water content). When a static sounding technique is used to explore the position of the water drop dam, the relevant data of the in-situ test procedure for the engineering geological in-situ test of the railway can be directly applied, The relationship between the water content and the specific penetration resistance is established, and the critical specific penetration resistance value corresponding to the different plastic state of the dam is obtained. (4) With the advantage of the SURFER software, the plot of the specific penetration resistance is quickly drawn, and the workload of the drawing is reduced. The drawing of the contour map of the specific penetration resistance of the dam body can be convenient for us to process and analyze the data volume of the static sounding test, and the size of different positions of the dam body can be more accurately and clearly presented, and further analysis and research can be carried out conveniently. The proper adjustment of the contour level of the static sounding and penetration resistance contour map is made, and after the proper color is filled, the rolling layer of the dam body and the water drop impact layer can be specifically analyzed. The color map of the specific penetration resistance drawn for the rolling layer of the dam body clearly presents the strength of the rolling layer at different positions of the dam body, and further the quality of the rolling layer at different positions of the dam body can be analyzed, And can provide a scientific basis for the reinforcement of the dam body. The specific scope of the five plastic state zones of the dam body can be clearly presented for the plastic state zoning map of the dam body drawn by the water-drop impact-filling layer, wherein the flow-plastic zone, i.e. the range of the flow state area, should be paid great attention, The zoning map of the plastic state of the dam body at different time can be convenient for us to form, develop and analyze the dissipation of the dam body, and then to judge the stability and safety of the dam body.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S157
【参考文献】
相关期刊论文 前1条
1 胡良军,张晓萍,杨勤科,李锐;黄土高原区域水土流失评价数据库的建立[J];水利学报;2002年01期
，本文编号：2446160
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