江西理工大学学报
江西理工大學學報
강서리공대학학보
JOURNAL OF JIANGXI UNIVERSITY OF SCIENCE AND TECHNOLOGY
2015年
1期
37-42
,共6页
红砂岩土%土层厚度%击数%密度%加固范围
紅砂巖土%土層厚度%擊數%密度%加固範圍
홍사암토%토층후도%격수%밀도%가고범위
red sandstone soil%soil thickness%tamp count%density%reinforcement range
利用相同单击夯击能，通过改变土层厚度和击数对赣南地区红砂岩土进行室内单点冲击试验，采用自制小环刀取土测试不同位置土体的密度。试验结果表明，土体的累计沉降量与累计夯击能基本符合y=Ax/(1+Bx）的关系；夯击能在土中的传播存在着一定的影响深度，且随着能量的增加在一定范围内是逐渐增加的，但增长的幅度是逐渐减小的；在夯击能量的作用下，土体密度的变化在竖直平面内近似椭圆形分布；基于土体密实度改变的特点和沉降量与加固深度的关系，推导出加固深度和加固宽度的理论计算公式。
利用相同單擊夯擊能，通過改變土層厚度和擊數對贛南地區紅砂巖土進行室內單點遲擊試驗，採用自製小環刀取土測試不同位置土體的密度。試驗結果錶明，土體的纍計沉降量與纍計夯擊能基本符閤y=Ax/(1+Bx）的關繫；夯擊能在土中的傳播存在著一定的影響深度，且隨著能量的增加在一定範圍內是逐漸增加的，但增長的幅度是逐漸減小的；在夯擊能量的作用下，土體密度的變化在豎直平麵內近似橢圓形分佈；基于土體密實度改變的特點和沉降量與加固深度的關繫，推導齣加固深度和加固寬度的理論計算公式。
이용상동단격항격능，통과개변토층후도화격수대공남지구홍사암토진행실내단점충격시험，채용자제소배도취토측시불동위치토체적밀도。시험결과표명，토체적루계침강량여루계항격능기본부합y=Ax/(1+Bx）적관계；항격능재토중적전파존재착일정적영향심도，차수착능량적증가재일정범위내시축점증가적，단증장적폭도시축점감소적；재항격능량적작용하，토체밀도적변화재수직평면내근사타원형분포；기우토체밀실도개변적특점화침강량여가고심도적관계，추도출가고심도화가고관도적이론계산공식。
The indoor single-point impact test was done on red sandstone soil of southern Jiangxi by using the same tamping energy and changing the layer thickness and the tamp count, and the density of soil at different positions were tested by using homemade cutting ring. The results show that the relationship between cumulative settlement amount of soil and the cumulative tamping energy is in compliance with y=Ax/(1+Bx);there is a certain influence of depth in the soil for the transmission of tamping energy and it is increasing with energy within a certain range, but the growth rate is gradually reduced; the changes of soil density under tamping energy represent elliptical distribution approximately on the vertical plane; based on the change of the soil's density and the relationship between the settlement amount and the reinforcement depth, the theoretical formula of reinforcement depth and width is deduced.
