水利工程围岩分类规范英文翻译

The appendix J engineering geology classification of surrounding rock

J.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.J

Table

J.0.1

Engineering geology classification of surrounding rock

Surrounding

Rock type

Ⅰ

Stability evaluation

of surrounding rock

Stability: stable for a long time

Stable

on

the

whole,

the

overall

stability

of

Ⅱ

surrounding

rock,

won't

produce

plastic

deformation

and

local

combination

block

instability may be produced.

Stability

is

poor

at

Some

place:

the

strengt

h

of

surrounding

rock

is

insufficient,

plasti

Ⅲ

c

deformation,

may

produce

at

some

place,

landslides

or

deformation

may

be

produce

d

when

there

is

not

supporting.

The

intact

soft

rock

may

be

short-term

instability

Unstable:

the

stability

of

surrounding

rock

is

Ⅳ

short-time, larger deformation and damage can

Shotcrete,

system

anchoring

bolt

and

steel

m

occur.

Ⅴ

esh,

for

the

big

span

case,strengthen

the

flexi

Very

poor

stability:

the

surrounding

rock

ble

and

rigid

supporting

can't

keep

stability

at

short-term.

deformation

or pour concrete lining.

and failure will occur seriously.

Shotcrete,

system

anchoring

bolt

and

steel

m

esh,

for

the

big

span

case,

it

should

be

stren

gthen

the

flexible

and

rigid

supporting.

Support type

No need supporting or use anchor at some place

or filling with concrete. Big span, shotcrete,

system anchoring bolt and steel mesh.

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.

1

Table J.0.2

Preliminary classification of surrounding rock

Rock types

structural types of rock mass

The

integrate

structure

or

the

thick

layered structure

Blocky structure

Submissive structure

In

thick

bedded

or

middle-thick

layered structure

Interbreeding structure

Hard rock

lamellar structure

mosaic structure

Block crack structure

Cataclastic structure

Fragmental or fragment

structure

The

integrate

structure

or

the

thick

layered structure

blocky

structure

or

submissive

structure

thick

bedded

or

middle- thick

Soft rock

layered

structure

or

interbreeding

structure

lamellar

structure

structure

or

blocky

Integrity

poor

Relatively

Cataclastic texture

broken rock

broken

structure

structure

or

fragment

broken

completely

Ⅴ

----

Ⅳ、Ⅴ

is

Ⅳ、Ⅴ

when

15>Rb>5

soft

and

no

groundwater;

Ⅳ

class

relative

integrity

When

t

here

is

no

groundwater,

Ⅳ、Ⅴ

Ⅳ

class;

when it has groundwater,

Ⅴ

class

Relatively

Broken rock

broken

completely

when

integrity

Ⅲ、Ⅳ

30>Rb>15

and

no

groundwater is

Ⅲ

class.

when it has groundwater,

Ⅳ

class.

when 15>Rb>5 Soft,

Ⅳ

class

Ⅴ

Ⅳ

Ⅳ、Ⅴ

---

When

there

are

groundwater,

Ⅴ

class

---

Integrity

poor

is

Ⅲ

Ⅲ、Ⅳ

relative

integrity

Ⅲ、Ⅳ

degree of rock

preliminary classification of surrounding rock

integrity

integrity

classes

Ⅰ、Ⅱ

Ⅱ、Ⅲ

Ⅱ、Ⅲ

Ⅱ、Ⅲ

The

hard

rock(Rb>60)

is

Ⅱ

,

(when 60>Rb>30) is

Ⅲ

.

instruction

The

hard

rock(Rb>60)

is

Ⅰ

,

(when 60>Rb>30) is

Ⅱ

Axis

hole

less

than

30

degree

Angle with the strike of the strata,

4 class.

when

rock

is

homogeneous,and

there

is

no

weak

interlayer,

Ⅲ

class

---

2

J.0.3

The determination of rock types, should comply with the table J.0.3.

Table J.0.3

The classification of rock types

rock types

Saturated uniaxial compressive

strength of rock

Rc(Mpa)

Rc>60

60≥Rc>30

30≥Rc>15

15≥Rc>5

Hard Rock

Hard Rock

Mid Hard Rock

Soft Rock

Little Soft Rock

Soft Rock

J.0.4

The determination of rockmass integral degree, should comply with the table J.0.4

Table J.0.4

The determination of rockmass integral degree

Integral

degree

of

rock mass

Group

Number

of

structural

development

Structural

spacing

The development

degree of structure

plane

No

plane

>100

100~50

slightly

-developed

50~30

Medium-

developed

30~10

relatively

developed

<10

Developed

<10

High

developed

-

plane

1~2

1~2

2~3

2~3

2~3

>3

disorderly

Integral

Relatively integral

Low integral

Little crush

Crush

-

Note: Structural plane spacing means the average value

J.0.5

The determination of rock mass structural type should comply with appendix N.

J.0.6

Detailed classification of surrounding rock should be to control the rock strength, rock mass

integrity

of

the

surrounding

rock,

structure

state,

groundwater,

and

main

structural

plane

occurrence overall rating of the sum of the five factors are divided into basic criterion, it is mainly

used for feasibility study, detail design stage, bidding and construction and shall comply with the

provisions of the table .

Table

J.0.6

Detailed classification of surrounding rock of underground cavern

Overall rating of

Surrounding rock type

Ⅰ

Ⅱ

Ⅲ

Ⅳ

Ⅴ

surrounding rock

T

T>85

85≥T>65

65≥T>45

45≥T>2

5

T≤25

Stress ratio of

surrounding rock strength

S

>4

>4

>2

>2

-

Note:For

Ⅰ、Ⅱ、Ⅲ、Ⅳ

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):

3