A.速度型傳感器靈敏度應(yīng)大于100mv/g, B.頻帶寬度應(yīng)不窄于10~1000Hz, C.放大系統(tǒng)增益應(yīng)大于60DB, D.采樣時(shí)間為50~1000s
A.對(duì)粘性土不應(yīng)少于14D B.對(duì)砂土不應(yīng)少于3D C.水沖沉樁不應(yīng)少于28D D.對(duì)粘性土不應(yīng)少于20D
A.磨細(xì)粒化高爐礦渣50~80% B.粉煤灰25~50% C.硅灰5~10% D.早強(qiáng)劑