上海地质
上海地質
상해지질
2010年
B11期
98~100
,共null页
工程勘察 注水试验 渗透系数 渗透段 土层各向异性
工程勘察 註水試驗 滲透繫數 滲透段 土層各嚮異性
공정감찰 주수시험 삼투계수 삼투단 토층각향이성
geotechnical investigation; water injection test; permeability coefficient; permeability section; soil layer anisotropy
本文分析了钻孔降水头试验的渗透系数计算公式，并与上海勘察规范的渗透系数计算公式进行对比，发现上海规范公式未能反映渗水段的各种边界条件、套管内径与渗水段直径差异、土层各向异性。在粉土或砂土层做注水试验、且套管隔水设置在上覆粘性土层中或者在夹粉土较多粘性土层做注水试验，采用上海规范公式计算得到的渗透系数将偏小。采用钻孔＋隔水带注水试验方法时，采用上海规范公式计算得到的渗透系数将偏大。综合分析结果，建议对上海规范公式进行适当修正。
本文分析瞭鑽孔降水頭試驗的滲透繫數計算公式，併與上海勘察規範的滲透繫數計算公式進行對比，髮現上海規範公式未能反映滲水段的各種邊界條件、套管內徑與滲水段直徑差異、土層各嚮異性。在粉土或砂土層做註水試驗、且套管隔水設置在上覆粘性土層中或者在夾粉土較多粘性土層做註水試驗，採用上海規範公式計算得到的滲透繫數將偏小。採用鑽孔＋隔水帶註水試驗方法時，採用上海規範公式計算得到的滲透繫數將偏大。綜閤分析結果，建議對上海規範公式進行適噹脩正。
본문분석료찬공강수두시험적삼투계수계산공식，병여상해감찰규범적삼투계수계산공식진행대비，발현상해규범공식미능반영삼수단적각충변계조건、투관내경여삼수단직경차이、토층각향이성。재분토혹사토층주주수시험、차투관격수설치재상복점성토층중혹자재협분토교다점성토층주주수시험，채용상해규범공식계산득도적삼투계수장편소。채용찬공＋격수대주수시험방법시，채용상해규범공식계산득도적삼투계수장편대。종합분석결과，건의대상해규범공식진행괄당수정。
Formula of permeability coefficient was analyzed for precipitation test and taken comparison against the formula of Shanghai geotechnical investigation code. It is indicated that the formula of permeability coefficient by Shanghai code failed to reflect the various boundary conditions, bush bore size, diameter difference between pipe and permeability section and the soil layer anisotropy. The permeability coefficient would be smaller by the Shanghai geotechnical investigation code when the water injection test was done in the layer of silt or sand mingled more clay. When drilling and impermeable section were taken in the water injection test, the permeability coefficient would be larger by the Shanghai geotechnical investigation code. Summarily, the formula by Shanghai code was hoped to be amended appropriately.
