I
8.3 M@ do k h h g ch& diem
6.3.1 M# dQ kh6ng ch6 d i h tuv thuQc v i o nhkng yku t6 sau:
- Tq I+ bHn dd: Tq le cang Ian bien t h i b tiv 1: 5.000 - I: 200, met d@dikm cang day.
- Hinh dang khu do: Khu vyc k60 dai theo bring, phHi b6 tri day dpc theo bang ....
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- ElIj phivc tap dia hinh, dia vet khu do. - ' €10 chinh xac do thikt kk yCu c h .
- Khi d0 dbc tuykn d6, tuykn k6, tuykn b b x6i I5 .... i 5 1/10.000 khbng chk m$t b&ng phAi day hon khi dQ dbc > 11 10.000.
Khi xac dinh tim dB, cbng trinh cha dB xay dwng bhng bC t6ng dbi hdi c6p chinh x6c va mat do dikm khbng chk day hon khi do tim d6 didu b h g d6t ...
B.3.2 Quy djnh chung v& m+t dQ nhwsau:
8.3.2.1 06i viri iw&i giHi tich: Quy djnh cho khu vwc trung binh ( dia hinh c6p 11, Ill), trung binh: 5 km2
c6 dikm tam giac hang 4; 2 krn2 c6 dikm giHi tich 1; 1 km2 c6 diem giHi tich 2 vbi t)i le binh db 1: 5.000.
- He s6 tang dikm tiv 1.2- 1.5 khi cap dia hinh Iring trcvhg ICn thinh c61p IV, c6p V, cap VI.
- Hg s6 giHm 1,5 khi vB binh db 1110.000, tang tiv 1,2- 1,5 khi v6 1:2.000, 1:1.000 va tang 2 lan khi v& 1: 500. 1:200.
6.3.2.2 . . ..~.. . ~ 6 i . . . .. viri d w n g c h u y h Quy djnh chung cha khu v(pc c6 dia hinh trung blnh (c6p 11. Ill), . . . . . . . . . . . . ... . . .
binh db 1: 5.000. L,
Dwbng chuydn hang IV: trung binh 2 km c6 1 dii?m.
- Dwbng chuykn c6p 1: 0.5- 1 km c6 1 dikm.
- Dwivng chuykn cap 11: 0,2- 0.5 km c6 1 dikm.
- Khi c6p dia hinh tang trw5ng hoac c6 y6u c i u dac biet vk kv thuet cha thi& kk !hi cbng c6 thi? b6 tri day g&p 1.2- 1.5 !An.
TCYN 8481 : 2010
Kkt ho.p dkm a, b dufff~ day quy dmh me! dB !rung binh nhv sau
Brin db t$ le 115000, 112000 trung binh tren 1 km2 p h i i c6 4 : 5 dikm kh6ng c l d c2c loai (Iiang 4.
cap1 , cap 2)
BBn db t)i 19 111000, 11500, 11200: trung binh tr&n 1 km' phai co 5 : 12 di6n-i i:.h8ny chk cbi: ic,:!i
TCVN 8481 : 2010
Phy l y c C (Quy dinh)
E)Q c h i n h xac, pham vi ivng d y n g va m$t do k h h g ch6 c a o dQ
C.1 DQ c h i n h xQc
c.1.1 Lwbi thug C ~ U & hang III
Khoing cach do tiu may dkn rnia r 50 m. (adsbygoogle = window.adsbygoogle || []).push({});
- Sai s6 khep tuyin: fh i f lOmrn d ~ , L = km di, dAi tuydn thuq c h u h
C.l.2 Lwwi thuq c h u h hang IV
- Khoing cach tiu may dkn rnia s 100 rn.
- Sai s6 khep cao do: fh s f 20 rnm JL.
C.1.3 Thuq chudn kjr thuat