CAJ | 학술논문

在固定的土壤含水量和干密度条件下，分别选取直径3，5和7 mm的落叶松、油松、白桦和蒙古栎根系，采用水平埋根、垂直埋根和复合埋根的方式制备直径为101 mm的根土复合体试样；应用全自动三轴压缩仪，设定围压分别为200，400和600 kPa，对试样进行固结不排水试验，评价埋根方式和根系直径对土壤抗剪强度的影响。结果表明：加根复合体的抗剪强度明显大于素土，抗剪强度随着埋根直径的增加而增大，土壤抗剪强度表现为复合根复合体＞水平根复合体＞垂直根复合体。植物根系在土壤中形成横纵交错的状态对减少滑坡等自然灾害可起到更好的作用。
재고정적토양함수량화간밀도조건하，분별선취직경3，5화7 mm적락협송、유송、백화화몽고력근계，채용수평매근、수직매근화복합매근적방식제비직경위101 mm적근토복합체시양；응용전자동삼축압축의，설정위압분별위200，400화600 kPa，대시양진행고결불배수시험，평개매근방식화근계직경대토양항전강도적영향。결과표명：가근복합체적항전강도명현대우소토，항전강도수착매근직경적증가이증대，토양항전강도표현위복합근복합체＞수평근복합체＞수직근복합체。식물근계재토양중형성횡종교착적상태대감소활파등자연재해가기도경호적작용。
In order to explore the mechanical mechanism of arbors roots to prevent shallow landslide by holding water and soil,we selected root systems of diameter in 3,5 and 7 mm of larch,pine,birch and Mongolia oak,and buried horizontally or vertically roots and buried horizontally and vertically roots to make into root-soil composite plots with a diameter of 101 mm in the soil with fixed water content and dry density conditions. Then a consolidated undrained ( CU) test was conducted with an automatic triaxial compression tester by setting the confining pressure in 200 ,400 and 600 kPa to evaluate the impact of buried-root modes and root diameters on the shear strength of the soil. The results showed that root-soil complex in shearing strength was significantly greater than pure soil,and the shear strength was in an order of:complex root complex > horizontal root complexes > vertical root complex. It was shown that the composite root in enhancing soil strength effect was most efficient,and thus,the composite root forest tree species would be the best in enhancing the soil strength to maintain soil stability.