编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第PAGE7页共NUMPAGES7页第PAGE\*MERGEFORMAT7页共NUMPAGES\*MERGEFORMAT7页1总则1.0.1为了统一石油化工企业土建工程中地脚螺栓设计参数的取值，特制定本规定。1.0.2本规定适用于钢框架、钢管架、钢支架及钢平台的柱脚地脚了螺（C级）设计参数的取值。1.0.3本规定引用的标准和规范：a）普通螺纹基本尺寸（GB196-81）；b）1型六角螺母-C级（GB41-86）；c）平垫圈-C级（GB95-85）；d）钢结构设计规范（GBJ17-88）；e）混凝土结构设计规范（GBJ10-98）。2设计参数2.0.1地脚螺栓的设计参数应按表2.0.1取值：表2.0.1地脚螺栓设计参数取值表地脚螺栓直径螺距P有效直径de有效面积Ae抗拉承载力设计值N（KN）螺母重每个垫圈重每个螺杆重每延米d（mm）（mm）（mm）（mm）Q235钢16Mn钢（kg）（kg）（kg）101.508.592758.08.1210.440.0110.0030.62121.7510.358284.311.8015.170.0160.0060.89（14）2.0012.1236115.416.1620.770.0250.0081.21162.0014.1236156.721.9428.210.0340.0111.58（18）2.5015.6545192.526.9534.650.0440.0142.00202.5017.6545244.834.2744.060.0620.0162.47（22）2.5019.6545303.442.4854.610.0760.0182.99243.0021.1854352.549.3563.450.1120.0313.55（27）3.0024.1854459.464.3282.690.1680.0394.49303.5026.7163560.678.48100.910.2340.0515.55（33）3.5029.7163693.697.10124.850.2800.0716.71364.0032.2472816.7114.34147.010.3710.0877.99（39）4.0035.2472975.8136.61175.640.1269.37424.5037.77811121.0156.94201.780.5990.20010.88（45）4.5040.77811306.0182.84235.080.24312.49485.0043.30901473.0206.20265.140.9570.28414.21（52）5.0047.30901758.0246.12316.441.1000.31916.68565.5050.83992030.0284.20365.401.4200.44319.35（60）5.5054.83992362.0330.68425.160.47722.21646.0058.37082676.0374.64481.681.9120.51325.27（68）6.0062.37083055.0427.70549.900.55028.53726.0066.37083460.0484.40622.800.58831.99（76）6.0070.37083889.0544.46700.020.70935.64806.0074.37084344.0608.16781.920.90239.49（85）6.0079.37084948.0692.70890.640.94244.58906.0084.37085591.0782.741006.381.21249.98（95）6.0089.37086273.0878.221129.141.25955.681006.0094.37086995.0979.301259.101.65461.70注：①括号内的地脚螺栓，尽可能不采用。②表中螺距系按国标GB196-81《普通螺纹基本尺寸》查得，如图示：③地脚螺栓有效面积Ae=④地脚螺栓抗拉承载力设计值N=Ae×ff（地脚螺栓抗拉强度设计值）=140N/mm2（Q235钢）f（地脚螺栓抗拉强度设计值）=180N/mm2（16Mn钢）2.0.2地脚螺栓伸出基础面长度（H），（基础顶面至地脚螺栓顶的距离），应符合下列公式要求（图2.0.2）：单螺母垫圈双螺母及垫圈图2.0.2地脚螺栓伸出基础面长度a)单螺母及垫圈H≥h+1.5d(2.0.2-1)b)双螺母及垫圈H≥h+2.3d(2.0.2-2)式中