土石方工程中土的种类有哪些?

2025-03-15 22:01:29
推荐回答(1个)
回答(1):

土的分类、土的级别、土的名称、坚实系数f、密度(kg/m3)、开挖方法及工具
一类土(松软土)
Ⅰ砂土、粉土、冲积砂土层;疏松的种植土、淤泥(泥炭)0.5~0.6600~1500用锹、锄头挖掘,少许用脚蹬
二类土(普通土)
Ⅱ粉质粘土;潮湿的黄土;夹有碎石、卵石的砂;粉质混卵(碎)石;种植土、填土0.6~0.81100~1600用锹、锄头挖掘,少许用镐翻松
三类土(坚土)
Ⅲ软及中等密实粘土;重粉质粘土、砾石土;干黄土、含有碎石卵石的黄土、粉质粘土,压实的填土0.8~1.01750~1900主要用镐,少许用锹、锄头挖掘,部分用撬棍
四类土(砂砾坚土)
Ⅳ坚硬密实的粘性土或黄土;汗碎石、卵石的中等密实是粘性土或黄土;粗卵石;天然级配砾石;软泥灰岩1.0~1.51900整个先用镐、撬棍,后用锹挖掘,部分用楔子及大锤
五类土(软石)
Ⅴ~Ⅵ硬质粘土;中密的页岩、泥灰岩、白垩土;胶结不紧的砾岩;软石灰岩及贝壳石灰岩1.5~4.01100~2700用镐或撬棍、大锤挖掘,部分使用爆破方法
六类土(次坚石)
Ⅶ~Ⅸ泥岩、砂岩、砾岩;坚实的页岩、泥灰岩、密实的石灰岩;风化花岗岩、片麻岩及正长岩4.0~10.02200~2900用爆破方法开挖,部分用风镐
七类土(坚石)
Ⅹ~ⅫⅠ大理岩、辉绿岩;玢岩;粗、中粒花岗岩;坚实的白云岩、砂岩、砾岩、片麻岩、石灰岩;微风化安山岩、玄武岩10.0~18.02500~3100用爆破方法开挖
八类土(特坚石)
ⅪⅤ~ⅩⅥ安山岩、玄武岩;花岗片麻岩;坚实的细粒花岗岩、闪长岩、石英岩、辉长岩、辉绿岩、玢岩、角闪岩
18.0~25.0以上2700~3300用爆破方法开挖

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