水利工程围岩分类规范英文翻译.doc

The appendix J engineering geology classification of surrounding rockJ.0.1 The engineering geologic classification of surrounding rock can be divided into preliminary classification and detailed classification. The classification results can be used to evaluate the stability of surrounding rock and as the basis of support type. Classification of surrounding rock shall conform to table 0.1.JTable J.0.1 Engineering geology classification of surrounding rockSurrounding Rock typeStability evaluationof surrounding rockSupport typeStability: stable for a long timeNo need supporting or use anchor at some place or filling with concrete. Big span, shotcrete, system anchoring bolt and steel mesh.Stable on the whole, the overall stability of surrounding rock, wont produce plastic deformation and local combination block instability may be produced.Stability is poor at Some place: the strength of surrounding rock is insufficient, plastic deformation, may produce at some place, landslides or deformation may be produced when there is not supporting. The intact soft rock may be short-term instabilityShotcrete, system anchoring bolt and steel mesh, for the big span case, it should be strengthen the flexible and rigid supporting.Unstable: the stability of surrounding rock is short-time, larger deformation and damage can occur.Shotcrete, system anchoring bolt and steel mesh, for the big span case,strengthen the flexible and rigid supporting or pour concrete lining.Very poor stability: the surrounding rock cant keep stability at short-term. deformation and failure will occur seriously.J.0.2 A preliminary classification of surrounding rock is mainly on the basis of rock type and rock mass structure type or the integrite degree, rock mass is suitable for the planning and preliminary feasibility study phase, and should be in accordance with the table below.Table J.0.2 Preliminary classification of surrounding rockRock typesstructural types of rock massdegree of rock integritypreliminary classification of surrounding rockclassesinstructionHard rockThe integrate structure or the thick layered structureintegrity、The hard rock(Rb60) is, (when 60Rb30) is Blocky structurerelative integrity、The hard rock(Rb60) is , (when 60Rb30) is .Submissive structure、In thick bedded or middle-thick layered structure、Interbreeding structure、Axis hole less than 30 degree Angle with the strike of the strata, 4 class.lamellar structure Integrity is poor、when rock is homogeneous,and there is no weak interlayer, classmosaic structure-Block crack structure-Cataclastic structureRelativelyBroken rock、When there are groundwater, classFragmental or fragment structurebrokencompletely-Soft rockThe integrate structure or the thick layered structureintegrity、when 30Rb15 and no groundwater is class.when it has groundwater, class.when 15Rb5 Soft, classblocky structure or submissive structurerelative integrity、When there is no groundwater, class; when it has groundwater, classthick bedded or middle-thick layered structure or interbreeding structurelamellar structure or blocky structureIntegrity is poor、when 15Rb5 soft and no groundwater; classCataclastic textureRelativelybroken rock、broken structure or fragment structurebrokencompletely-J.0.3 The determination of rock types, should comply with the table J.0.3.Table J.0.3 The classification of rock typesrock typesHard RockSoft RockHard RockMid Hard RockLittle Soft RockSoft RockSaturated uniaxial compressive strength of rockRc(Mpa)Rc6060Rc3030Rc1515Rc5J.0.4 The determination of rockmass integral degree, should comply with the table J.0.4Table J.0.4 The determination of rockmass integral degreeIntegral degree of rock mass IntegralRelatively integralLow integralLittle crushCrushGroup Number of structural plane development 12122323233disorderlyStructural plane spacing10010050503030101085485T65465T45245T252T25-Note:For 、 types, when the stress ratio is less than the above, then the rock type corresponding lower level .J.0.7 The strength-stress ratio, S, may be obtained by the following equation (J.0.7): S=RbKVm (J.0.7)Where: RbSaturated uniaxial compression strength of rock (MPa); KvIntegrity coefficient of rock mass, i.e.: square of ratio of longitudinal wave velocity of rock mass to that of rock therein; mmax. principle stress of surrounding rock (MPa), if there is no measured data available , it may be replaced by self-weight stress.J.0.8 The ratings of five factors in the detailed classification shall comply with the following stipulations.1. The ratings of rock strength shall comply with Table J.0.8-1. Table J.0.8-1 Rating of rock strengthRock strength typeHard rockSoft RockStiffModerately stiffModerately weakWeakSaturated uniaxial compression strength Rb (MPa)Rb 6060Rb3030Rb1515Rb5Rating (A)3020201010550Notes: (1) For rock with saturated uniaxial compression strength of greater than 100MPa, the rating of strength shall be 30. (2) When the sum of the ratings of rock integrity and structural plane conditions is less than 5, the rating of rock strength shall be taken as 20 in the case that it is greater than 20.2. The rating of rock mass integrity shall comply with Table J.0.8-2. Table J.0.8-2 Rating of rock mass integrityRock mass integrityIntegralRelatively integralPoorly integralRelatively crushedCrushedIntegrity coefficient of rock mass KVKV0.750.75KV 0.550.55KV 0.350.35KV 0.15KV0.15Rating (B)Hard rock4030302222141466Soft rock251919141499430MPa, and the sum of ratings of integrity and structural plane conditions is greater than 65, the rating shall be taken as 65;(2) If 30MPaRb15MPa, and the sum of ratings of integrity and structural plane conditions is greater than 55, the rating shall be taken as 55;(3) If 15MPaRb5MPa, and the sum of ratings of integrity and structural plane conditions is greater than 40, the rating shall be taken as 40;(4) For very soft rock with Rb5MPa, integrity of rock mass and structural plane 7conditions will not be involved in rating.3. The rating of structural plane conditions shall comply with Table J.0.8-3.Table J.0.8-3 Rating of Structural Planes ConditionsStructural planes conditionsOpening W(mm)Closed W0.5Slight open 0.5W5.0Open W5.0Filling material-NoneRock debrisMudRock debrisMudRolling and rough conditionsRolling and roughStraight and smoothRolling and roughRolling and smooth or straight and roughStraight and smoothRolling and roughRolling and smooth or straight and roughStraight and smoothRolling and roughRolling and smooth or straight and roughStraight and smooth-Rating (C)Hard rock272124211521171215129126Relatively soft rock272124211521171215129126Soft rock18141714814118108684Note: (1) For a structural plane with an extended length of less than 3m, the ratings of structural plane conditions for hard and relatively soft rocks shall be added by 3 respectively, and rating for soft rock added by 2; for a structural plane with an extended length of greater than 10m, the ratings of hard and relatively soft rocks shall be cut down by 3, and rating for soft rock cut down by 2.(2) For a structural plane with an opening of greater than 10mm and with no filling material, the rating of structural plane conditions shall be zero.4. The rating of ground water conditions shall comply with Table J.0.8-4 Table J.0.8-4 Rating of ground water conditionsRegimeDry to seep dripLinear running waterWater gushingDischarge q (L/min10m cavern length) or pressure head H(m)q25 or H1025q125 or 10125 or H100Rating of basic factors (T)T85Rating of ground water (D)00 -2-2 -685T650 -2-2 -6-6 -1065T45-2 -6-6 -10-10 -1445T25-6 -10-10 -14-14 -18T25-10 -14-14 -18-18 -20Note: The rating of basic factors T refers to the sum of the above ratings A, B and C.5. The rating of occurrence of main structural plane shall comply with Table J.0.8-5. Table J.0.8-5 Rating of occurrence of main structural planeIncluding angle of structural plane strike with axis of cavern90 6060 307070 4545 207070 4545 207070 4545 2020Rating(E)Roof0-2-5-10-2-5-10-12-5-10-12-12Side walls-2-5-20-5-10-20-10-12-50Note: For surrounding roc