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三河尖付井表土段穿过第四纪冲积层,厚215.9米。其中砂性土22层,计厚47.84米;粘性土36层,计厚126.24米;含粘土砂砾10层,计厚40.36米。主要流砂层分布在垂深65～130米之间,含水丰富,厚层粘土则主要分布在表土段底部。 井筒表土段采用冻结法施工。冻结深度为250米,施工净径为7.26米,外壁厚500毫米,内壁厚度在垂深130米以上为700毫米,在垂深130～245米为800毫米,井壁结构为双层钢筋混凝土。
The Sanhe tip pay well surface section through the Quaternary alluvial layer, 215.9 meters thick. Among them, there are 22 layers of sandy soil with thickness of 47.84 meters, 36 layers of clay, 126.24 meters of thickness, 10 layers of clay gravel and 40.36 meters of thickness. The main sand layer located in the vertical depth of 65 to 130 meters, rich in water, thick clay is mainly distributed in the bottom of the soil section. Wellbore surface soil freezing method construction. The freezing depth is 250 meters, the construction net diameter is 7.26 meters, the outer wall thickness is 500 mm, the thickness of the inner wall is 700 mm above the vertical depth of 130 meters and 800 mm at the depth of 130 to 245 meters.