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1986～1988年间我院接受了嘉陵江苍溪至合川段九个梯级的规划、可行性研究以及初步设计三个阶段的地勘工作。工作区内除沿河阶地、河床和冲沟底部有部份第四系松散堆积外,地层主要为中生界红色陆相碎屑地层(即红层)。其中阆中以上属白垩系,阆中至合川为中上侏罗系地层。岩性为砂岩(湿抗压强度约50MPa)、泥质砂岩、砂质粘土岩和粘土岩(湿抗压在5MPa以下)。据以往工程经验,在以软岩为主的红层中修建水工建筑物,不同成因的软弱夹层是个很重要的工程地质问题,而九个梯级中均不同程度的存在软弱夹层,因此,如何通过有效而又经济省时的手段来了解它的空间分布以及化学、物理、力学特性是非常重要的。除依靠平
From 1986 to 1988, our hospital accepted the nine steps of Cangxi-Hechuan section of Jialing River, feasibility study and preliminary design of three stages of geological prospecting work. In addition to some loose Quaternary sediments along river terraces, river beds and gully bottom in the working area, the strata are mainly the Mesozoic red terrigenous clastic formations (ie red beds). Among them, there are Cretaceous above Langzhong, and middle Jurassic strata from Langzhong to Hechuan. Lithology is sandstone (wet compressive strength of about 50MPa), argillaceous sandstone, sandy clay rock and clay rock (wet compressive strength below 5MPa). According to the engineering experience in the past, it is an important engineering geological problem to construct hydraulic structures in red beds with soft rock as the main cause. However, weak sandwiches exist in all of the 9 steps It is important to understand its spatial distribution, as well as its chemical, physical, and mechanical properties through effective and economical time-saving measures. In addition to rely on flat