摘要
全方位深松部件能造成鼠道的结构特征是其呈梯形框架式，并且底刀向前和下方伸出。底刀伸出量的垂直投影即为鼠道高度。鼠道顶部形状取决于底刀末端截面线的形状。能形成鼠道的土壤含水率为12％～23%。在土箱中采用静态和动态方法模拟造成鼠道，并研究其承载强度。鼠道承载强度峰值所对应的土壤含水率为23．4%；土壤体积密度超过1．42g·cm－3后，承载强度急剧增大；抛物线型拱顶鼠道的承载强度较平面型拱顶大11．25%。在土槽中用测力台车测试底刀模型部件的结果表明：当底刀末端拱线矢高分别为10，15和20mm时，深松比阻的增长率分别为3．1%，10%和30．5％，因而在生产中不宜采用曲面型拱顶的鼠道。
The constructional feature for bulk subsoiler to form mole lies in that its working part has the form of trapezoid frame,and its base blade is extending forward and downward.The top form of mole depends on the end section outline of the base blade. The proper soil moisture for forming mole is 12%~23%. The mole has been simulated in soil box by both static and dynamic ways for testing bearing capacity(BC). The peak of BC appears when the soil moisture is 23.4%,BC increases sharply,while the bulk density of soil has the value of 1.42 g·cm-3,and the mole with curved top has more BC than that with the plane top. The draft of 4 model parts with different shaped base blade has been tested in soil bin. When the arch height has the value of 10, 15, 20 mm, the correspending rate of increase for specific draft is 3.1 %, 10%, 30.5%. So the mole with curved top is not suitable for practical use.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1997年第4期53-58,共6页
Journal of China Agricultural University
关键词
深松机
鼠道
稳定性
承载强度
深松比阻
bulk subsoiler
mole
stability
bearing capacity
specific draft
