这几篇也可以参考一下

//m.gwm99.com/Data_List.aspx?SearchValue=%E7%AE%A1%E9%81%93%E6%96%BD%E5%B7%A5

管道沟槽开挖方案:http://wk.baidu.com/view/d2747addd15abe23482f4dfc?pcf=2&spm=0.0.0.0.bECjiA

管道沟槽开挖专项施工方案_百度文库
http://wenku.baidu.com/link?url=jQ88fsAavYs579J2ABc4PsAv59_DDijyG3lGMoRpNXRYI1aF2-COql9xDhsLgZaV-_n_37RgNnIESPzfm6HepV53xFwsKMWWYorHZpa4rQ3