您好，老师 麻烦想问您下 基坑支护中的锚索一般怎么计算工程量和套哪个清单和定额子目啊？

                                                                                                                                                                                                                                                                                                                                              基坑支护中的锚索按施工图长度乘以锚索单位重量按重量“吨”计算工程量。套用2013清单规范清单编码010515005项目名称后张法预应钢筋，套用2011土建预算定额A4-442有粘结预应力钢绞线定额子目。