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Diro vidt Dodn, Nguy6n Tdi Tidn
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vi6t Do)n, Nguy6n Xu6n L6p
Nguy6n Phan Duy
Nguy6n Phan Duy
Trinh
LA
Hing, Nguy6n
Thi Thu Nga
Nguy6n Xu6n Min, Nguy6n Duy6n Phong,
59
63
167
17 O
17 4
179
1 83
1 86
1 89
1 93
1
Interaction anal),sis ofcp-pile-foundation
1
[xperimental study and numeriol simulation 0n mechankal behaviours ofcoral sand
in generalized GibsonS soil model
Researching to produc€ ultra high performan(e
in
lruong 5a lsland
onffete with fine aggregate
Num€ri(al anallais forthe effect ofvacuum deep well on tunnel (onstruction in soft - soil
Factors affect
the deformation in rock mass surrounding cir(ulartunnels
study 0n determining the nability distance fiom tunnel face to fault
A study on
deflection ofgfip reinforced concrete b€am undershort-term and long-term loading in differentworking shges
Physi(al-mechaniel properties offiber conoete using fiber recycled from steel wire rope
Soil erosion assessment using univeBal soil lossEuation
(usle). a
csestudyin
huong hoa
QuangTri province
distri4
Effect ofblasting 0n the stress state in the rock mass around the tunnel
Nguy6n Ngoc HuA, Pham Dic Hinh
Si llggc
Er
Anh, Cao Chu Quang, Nguy6n Qu6c 86o
Qung
Qng
Hoc, N9uy6n Thinh
LA,
T6ng Thi Hanh
Vdn Ki€n, V6 Trong Hi.rng, D6 Ngoc Anh
V0 Trong Hidu, Dam Trong Thdng
fEmTrongThing,V0Trong Hidu,
LA
Hdng H6i
Nguy6n Vin Tti
196
199
203
208
21 1
21 4
'Generating the artifi(ial a(eleration with response spectra mathing using Wavelet adjustmenf'
5tudyand establish subsiden(eforeost
Research on the effuct
lgi
l€gcThn,
Tdng Vdn L6m, Nguy6n Tidn Nam
Nguydn V0 Hirng, Hoing Vdn Tudn
Nguy6n Duydn Phong, Nguy6n Xu6n Man,
21a
222
225
Pankratrenko A.N, Pham Thi Y6n
Nguy6n ChiTho, Nguy6n Xu6n Birng
L6 H6i Dtlong, Nguy6n TriTd
l,lguy€n Cdng Nghi, LA Anh Tudn, V0 Dinh Ldi
Nguy6n Vdn Hidu
Nguy6n NgocTri Hu)'nh, H6lhanhTri,
on
the
subsiden(eftom m0nitoring results
adjacent existing tunnel during tunnel excavation by blasting method
Study 0n determination ofthe sp€cific (onsumpti0n ofexplosives
a(ording
to the
md fragmentation
index and the average rock size after blasting
Research on determination method ofthe mck fragmentation index in blasting
Dynamic (akulation of Elasto-plastic Planar trame Acording to Genenlized (lough Model in Consideration ofGeometric Nonlinearity ofStuctures and
Effect ofAxial Forc on Planic
S.l,
models in a(ordanc€ with anal),sis andforecastsoftground
ofblaning vibration
timit Stah of(ross
-
Sections
50luti0n to enhanG the effiden(y in application oftechnology ement soils to improve soft soils
Researd on effect ofiddenc angle on blasting wave pressure ading 0n structur€s by software ansys aut0dyn 3d
Calculation ofsupporting shell in (onnecting-tunnel
between two metrostations in romplex geological conditions based on balancestate"supporting
shell-rockmas
229
232
235
2 38
241
Research estimating the stength
oflightweight
c0mposite fortitude and proposing usage
oiteria
Research project(alculation ofthe steel fiame covered with tarpaulin (ombined sandbags
Researding about p0ssibility ofexplosion pressurc redudion ofelastic materials
by
experiment
Modern methods ofspectum density estimations for airfield pavements level
Study on durability performance ofsupersulfated cement in marine environment
Nguy6n Phung AnhToin, Nguy6n Kh6nh Son
Hai Dudng
246
250
254
Kidu D6 Trung KiCn, LC Minh Sdn,
258
V0 D)nh Hudng, LA Anh Tudn
TriT5, Nguy6n Nhr.t Hirng, Nguy6n Lam Tdi
Nguy6nTriTd,
LA
5D0F method for
identifiing
natural fuquency, mode shape, and damping ratio ofstuctures from measurement data
Building automated s0ftware for (akulating and simulating the viability ofbuildings based on
G15
technology
Research on the impact ofthe particular exposure (oncerning publi( strudural component (onceming environmental intervention to the environment
affecting debt in soil
Using an
adivity nano-silic (si0-2)
prepared from rice husk ash t0
fabricte the high ompressive stength mortar
Nguy6n V0 UyAn Nhi, D6 Quang Minh
Nguy6n Huy Hi6p, Mai Ddng Nh6n
Tr6n H6ng Hdi, L6 Quang Trung, Hd Ngoc Khoa
L6 Minh Hing,Tdng Thi Hqnh
Nguy6n V6Th6n9,
D6Vin
Manh
Phan Quang Minh, BiiThiCn Lam
Nguy6n Trdn Hidu, V! Anh Tudn
Nguy6n 86oThinh
261
264
267
27 1
27 4
278
28 1
Reseach 0n fast calculation method to determine effed ofdeep excvation on strip footing ofadjacent building
Researdes about lateral pressure ofselfconsolidating
An analysis
ofbuilt-up
Inspecting and evaluating cracking Guses ofreinforced (onsete slab 0fhighris€ building
Study and proprosal ofgust loading factort0 Gkulate wind load on fiame-wall buildings according toVietnamese standardICVN 2737:1995
Studythe behaviorofsteel-(oncrete composite beam by experimentand numedcal simulation
Capturing The Value
oflhe"Righg'to
Office:37 Le Dai Hanh, Hanoi
Editorial Board:
04.397 407 44; 09833821 88
Design:Thac Cuong, Quoc Khanh
Publication: No:
(onoete
land dDnge detertion in Hanoi using multitemporal remote sensing data
372IGP-BTTTT date 5th, July/201 6
Account:1 13000001 172
Joint Stock Commercial Bank of Vietnam Industrial
and Com,mercial Branch, Hai Ba Trung, Hanoi
Printed in: Nhandan printing HCMC limited Company
Build High-rise Buildings in Vietnam: Real E tate Devel0pe6 and Planne6 in Ho
(hi Minh City
Editorial commission:
Scientific commission:
Le Quang Hung, Ph.D
Prof. Nguyen Van Lien, Sc.D
(Chairman of Editorial commission)
fusoc. Prof. Pham Duy Hoa, Ph.D
tusoc. Prof. Nguyen MinhTam, Ph.D
LeTrungThanh, Ph.D
Tran Van Khoi. Ph.D
Assoc. Prof. Ho Ngoc Khoa, Ph.D
(Chairman of Scientific Board)
Prof. Phan Quang Minh, Ph.D
Secretary of Scientific Counci
Prof. Nguyen Thi Kim Thai, Ph.D
Prof. Nguyen Huu Dung, Ph.D
Prof. Cao DuyTien, Ph.D
Prof. Hiroshi Takahashi. Ph.D
Prof. Chien Ming Wang, Ph.D
Prof. Ryoichi Fukagawa, Ph.D
Ass. Prof. Nguyen QuocThong, Ph.D
7.2017 XIEDUNC 15
Tinh todn v6 ch6ng doqn him nOi giCua hai ga metro trong di6u kign dla
ch6t phuc-tqp tr6n co s& nghiOn c*u trgng inai cdn bing-",j" h6 ,lv6
ch6ng-kh6i ddt de"
(alculation of supportingshell in connecting-tunnel
between two meilo stations in complexgeological conditions based
on balance state"supporting shell-rock mass"
Ngiy nh6n bdi: I5l6l20t7
Ngdy sura bdi: 221 612017
Ngiry ch6'p nh6n ddng: 0617120t7
Nguy6n Duy6n Phong, Nguy6n Xu6n MEn,
Pankratrenko A.N, Phqm Th! YAh
tolt tAt'
Giii quydt vdn
dd giao th6ng d6 thi ld mdt vdn tld hdt srtc thdi srt, dic bi6t ln tht d6
He Ndi vi rhinh ph6 Hd chi Minh. Dd gini quydt v{n ttd ndy d6 dda ra gi6i ph6p
xay dti"g c6c tuy6n tau dicn tr6n cao vi tdu diQn ngdm. Tr6n thric t6 khi xay drrng
c6c tuy6n tiu di6n ngdm di qua c6c khu di tich lich sir, m{t d0 dnn s6 cao, c6 nhidu
cdng trinh b6 mat, ... thi phrtong ph6p thi c6ng hd kh6ng kh6 thi, cdn sfi dUng
phriong phdp thi c6ng ngdm. c6c khu vtic ndy thrrong li ddt y6u, c6c chi ti6u co-l1i
cira ddt gay bdt loi cho c6ng t6c thi c6ng hdm; ching han nhu r\ic dinh nh6, g6c
ndi ma s6t b6, d6 r6ng l6n, h€ sd thdm cao, d0 bio hoa nu6c ldn, srrc bdn ch6ng c6t
nh6' ... Nhfing ydu t6 n6u trdn hinh thdnh n6n didu ki€n dia chdt phrlc tap trong
thi c6ng hdm. vdi dic didm d6 vi€c tinh to6n lua chgn cdu tao v6 ch6ng cho c6i
tluong hdm li cdn thi6t, mang tinh thoi srr. Bii vi6t tld cip
v0ng vi dn dinh cho c6ng trinh.
Titkh6a: Ttnh todn, dndnghdm, itidukiAn dia chdt
1
. Cd
sd ly
thuydt
Di€u ki6n dia chdt phtlc tqp trong bii vidt niry cfrloc
hidu li nhrrng y6u t6, didu kiAn mi kh6i ddt cf6 xung
quanh ph6t sinh, phdt tridn khi clio hdm g6y bdt loi
cho c6ng tdc thi c6ng. Khiii quiit rtidu ki6n dia chdt
ph(c tqp d tl6y tltroc hidu la ddt c6 srtc ch6ng cit nh6
do luc dinh Cvi g6c ndi ma sdt E nh6; dO r6ng ldn, h6
s6 thdm cao, et6 b6o hda nudc ldn, c6 thd phiit sinh
ddt-ciit chiy, h6a l6ng, th)nh vdch h6 dio kh6ng dn
dinh d6 sqp ttd, ... Nhrlng y6u t6 tr6n cirng vdi didu
ki6n ch6t hep vd kh6ng gian, m6t dQ giao th6ng vi
c6ng trinh bd mdt cao, ... s6 lim cho vi6c thi cdng
c6ng trinh ng6m kh6 khin, ddi h6i phdi srlt dung cdc
phrrong ph6p phi th6ng thudng.
Vi6c tinh to6n kdt cdu v6 ch6ng cho cdc tuydn hdm
c0a tiu efi6n ngdm b5 tritrong khu vuc etia chdt
phfc tap ndu trdn sE tdn tai rlng sudt ban ddu - dp
f
ucth0ytinh:
o(0x0) -o(0x0)
=-yH, {)t't =g.
(1)
Addressing traffic congestion in urban areas is a very urgent matter, especially in
capital Hanoi and Ho chi Minh city. In order to solve this problem, a soluion has been proposed for the construction ofoverhead tram and subway lines. In
reality, when constructing subway lines through areas having historical sites, high
population density, many above-ground stnrctures, etc., the opening excavation
nethod is not feasible, it is necessary to use the underground construction methThese areas are often weak soil, of which the physical-mechanical properties
detrimental to the tunnel construction; Such as small cohesion, small internal
ion angle, high porosity, high permeability coeficient, high water saturation
, small shear strength etc. These factors create complex geological conditions
constructing the tunnel. Hence, the calculation to select the supporting shell
re is necessary. The article deals with the calculation ofthe tunnel supporing
between two metro stations in complex geological conditions to ensure the
and stability ofthe structure.
calculation, tunnel, geological conditions.
n Duy€n Phong, Trudng Dai hoc M6-Dia chdt
n Xuin Mdn, Trildng Dai hgc M6-Dia chdt
A.N, Dal hqc tdng hqp nghi€n cfiu vd c6ng nghQ qu6c gia MISIS.
Thi Y6n, Trildng Dai hoc M6-Dia chdt
d cfdy: y - trong ludng thd tich trung binh cOa ddt rld;
H - chi6u sAu b6 tri dat dudng hdm; ddu trir (-) trlong
fng v6i fng sudt n6n.
Ap dung nguy€n l! chdng chdt cho ph6p m6 hinh
h6a toirn bd r"?ng sudt trong kh6i cfdt l6n c6n xung
quanh cludng hdm bing tdng rlng sudt ban cldu d0)
tot
vd fng sudt bd sung ollxo) (kh0 rlng sudt), didu ki4n
hinh thdnh drfdng hdm: o:{0) = o{0x0) + o{1)(0).
otdt ca ciic thinh phdn tenxo,ing ,rftl
Kh6i ni6m "khrl rlng sudt"cfrloc GS. Rosdin t.V. t5l dua
ra ef6 m6 ph6ng hinh thinh drrdng hdm vdi rlng sudt
trudc c0a kh6i ddt clii c6 trong luong. S0 dung kh6i
ni6m d6 don gi6n ehla ra ring: sau khi dudng hdm
dlloc dio thi tr€n bi6n hdm cdn ph6i9i6i ph6ng toin
b6 tdt cd fng sudt phdp tuydn vir rlng su5t ti6p tuydn.
D6 ld c6 thd dat t6i sq x6p ch6ng tr6n midn r-lng sudt
d tl6y: k1i hi6u
ban cfdu xung quanh tludng hdm gi6 tri bing nhu
vdy, nhung ngudc lai bdng ddu hi6u fng sudt bd
sung. Theo quy lu6t trr nhi6n / nghia ring tiic d6ng
d6n bi6n drrdng hdm tidp sau sd lir fng sudt ban cldu
cdn ph6i gi6m r,lng sudt.
Sau khi dudng hdm dugc l5p dung v6 chdng, v6
chdng s6 c6 dQ cfng x6c cfinh, phu thudc vio chidu
7.2017 MEDUMCI225
dly
cdu tao c6ng trinh ngdm vi tinh chdt bidn
dang cOa vdt li6u v6 ch6ng, tr] d6 ch6 tao v6
chdng, trong kh6i ddt ditxly ra sr,r ph6n b6 l4i
fng sudt. TrJ trUdng hop d6, khi n)o v6 ch6ng
duoc bd tri truc tidp tr6n gudng, ngay l6p trlc
sau khi mat cdt dudng hdm cluoc md ra, kh0 (bd
sung) fng sudt, tiic ddng vd phia kh6i ddt dd,
hoin toirn ilua ra trong v6 ch6ng vdi gid tri t6i
trgng (;ip luc theo hudng bdn kinh). V6 ch6ng
s€ lim vi6c chung vdi kh6i ddt itd trong tinh
chdt ph0c hop phdn t0 th6n9 nhdt bidn dang
h€ "v6 chdng-khdi ddt dit,: So dd tinh todn dd
x6c clinh chuydn dich cho ph6p cOa kh6i ddt dd
vd fng sudt trong v6 ch6ng cfr.toc clua ra tr6n
h)nh 1.
Til di6u kiAn (4) c6 kd ddn ph6n trtc v6 chdng q^
dang: o,(l)(il =yH - qo= -@o- Vtl),
sE c6
6
So dd trdn cho thdy vdi bii todn dit ra thi ldi gi6i
9i6i tich trong cdc tii li6u ttl, t2l, I3l, tal, 16l vd
[7] da dua ra m6t s6 ldi gi6i khdc nhau.
Gia thi6t ring dudng hdm kh6ng ch6ng:
Khi d6 tr6n bi6n lo (virng So) u?ng su6t toin phdn
trong hA toa cf6 cr,rc (c6 kd d6n bidu thr?c (t) vi
(2)) c6 thd vi6t nhtJ sau:
6ta) _o(1)(o) +o(o)tol _o{t)to)
_yH:O
- phdn h,tc v6 chdng; khi q" = g - 6nn
vdi trudng hop kh6ng ch6ng gi0 thi (S) trirng
voi (4)
Trong bi6u thfc (5) nh6n thdy ring, fng sudt
phdp tuydn t6c d6ng tr€n bi6n hdm L" trong
virng 50, ld n6n mang ddu Am,r,i
BOn ngoii bi€n v6 ch6ng (vdng S,) xudt hien
fng sudt n6n theo hudng bdn kinh q^, md hinh
h6a dp hlc m6 cdu tao c6ng trinh'ngdm voi
mit kh6i ddt d6 (virng 5o). 86 qua fng sudt ban
cldu trong v6 ch6ng yH,vidt bidu thrlc dd bd
sung ung sudt theo phuong biin kinh trong
vong 5, trdn elrrdng bi6n t^ vdi kh6i ddt dd:
--
qo
,
Vdi trudng hop khi nio v6 ch6ng Uun. OO(rXl
trtrc tidp tren gudng hdm, dd gi6i quy6t nhiCm
vu n)y c6 thd nhdn afuoc kdt qu6 vdi sfi dung loi
gi6i bdi toSn Lame [B]: m6 hinh h6a v6 ch6no
tit bi6n dang ph3n9 chidu dAy th)nh 6ng, t[
di6u ki6n c6n bing chuydn dich b6n kinh tr6n
dudng ti6p xric v6 chdng v6i kh6i ddt dii. Gi6 s0
tiic d6ng rlng sudt bd sung (5), (6) nh6n phllong
trinh.giri tri tudng d6i ph6n lrrc qo.
Ap dung voi chrj,! phLlong tic d6ng cOa t6i
trong vi clua vio trong bidu thri'c Lame bdn
kinh b6n ngoii 5ng ro= a, 6p lUc bdn ngodi p^
= 0, ti/ d6 vi6t bidu thrlc dich chuydn m6i
quong vd cirng (khdi ddt d6) tr6n bi6n L0:
uo=
'tclao-
YHI
(3)
Go
-
Xem x6t trudng hop khi dudng hdm c6 v6
ch6ng:
Vdi gi6 thi6t ring v6 ch6ng ngin c6n bi6n dang trr
do tr6n bi6n lo CtUdng hdm khi d6 s6 tao n6n ph6n
lUc qo. Xem x6t tUong t6c c0a phdn t0thu6c h6,,v6
ch6ng-kh6i ddt dd'| cho tr6n hinh 2.
ldm6crundichchuvdn:
o"=;h
c6thdvidtthdnh:
/
^qn= ffu") = q" = yu( t-?8 ,)- rn -r^ron ,
'
t Ho yH )
Tir(7)
vi(8)
d d6y
dit:
(S)
bi6n mdt cdt drrdng hdm uo. Vdi kdt qu6 niy ta
b)i to6n Lame vdi b;in kinh ngoii 6ng
ro= Rr 6p h-lc bdn ngoii po = qo, bdn kinh b6n
trong rr = R, vd 6p h.tc bdn trong pr = 0, di tdi bei
todn bi6n dang phSng c0a v6 ch6ng. Giii dich
chuydn hudng kfnh crla m6t didm b6n nqoiri
bi6n v6 ch6ng s6 lir:
XAEDUNS 7.2017
ch6ng. Ta vidt lai
qo= uotga.
(1
li
0)
= ffuo), vd
duong ddc tinh crli v6
0) nhu sau:
(1
1
)_,
"_
dd6yd;t tg"=!--fi--Ri
-
n. | (_zp,)Ri+Ril'
-.
(12)
Bidu di6n (9) vi (1 t) bing dd thi trCn cing h6
toa cl6 (qo, u/ cho trdn hinh 3. Giao didm A cOa
dudng 7 vd 2 bidu thi trang th6i can bing cia h€
th6ng nhdt"v6 ch6ng-kh6i ddt dii,i
I
Hinh 3. Dd thi xiic dinh trang thdi cdn bing cria h0 thdng nhdt
"v6 chdng-khdi ddt dit':
Hidn nhi6n rins,['li1l'J 4 sioa hai dd thi
tL/dng ung vdi trang thdi c6n bing c0a h6,,v6
ch6ng-kh6i ddt d6'i Gid tri q" = P fng v6i 6p
h,rc tdc dung l6n v6 ch6ng; gid tri uo
= U _ dich
chuydn titOiaat aa. roa J6 aigr,q ta toi gi6i c0a
h6 2 phuong trinh (9) vd (t 1); tit cfdy rrit ra:
,.o
afua vdo
trong thdng nhdt bidn dang h0,,vd chdng-khdi
quan h6 d6 chinh
Qo
(e)
De ddng nh6n thdy (9) li phuong tr)nh c6n bing
trang th6i c0a ddt dd, cho thdy rdng m6i gid tri
ph6n lrrc v6 ch6ng eo (dp lqrc d6n v6 ch6ng)
tuong ung vdi d6 ldn xdc clinh cia dich chuydn
50 dd tei
(1
Bidu th0c (10) c6 thd ifura ra dang
trong Trdn hinh 3: ih.tdng thing I - bidu di6n phr,rong
dic tinh co hoE c1a cfdt ild, gor: trinh (1 1); duong thSng 2 - bidu di6n phLtong
,
(4)
.
b6 tr6n bi6n lo dich chuydn vao phia
dudng hdm;
tr6n bi6n dudng hdm kh6ng ch6ng s6 ld:
=YH
zp)ni-nif
_
(7)
didu
d dAy: fng sudt tidp kh6ng cdn d6 cAp do bii
to6n d6i xr.?ng truc. Khi d6 fng sudt bd sung
o!t)to)
.
d Cl6y: ddu "-" trong bidu thrlc (7) th6a man
ki6n qo < yH - ung sudt trong kh6i ddt dd phdn
.
o^
no -I1
dAy: qo
o',""
Hinh 1. So dd tinh toiln v6 chdng
R^
,"=+;:+Ltt
z9l
(s)
(1
3)
Ung sudt b6 sung trong v6 chdng xdc otnn
bing bidu thr.?c:
ngoii bi6n v6 ch6ng
- Bdn
1t
-(ei)
"d
_
p2
,,0
- ---Etlo
1 ,']
D2
,Io
-
.
lo:
ol1) =
-qo I
didm cdn bing gidi han c6 tung dQ qo= P",c6
nghia ring dQ bdn v6 ch6ng s6 d6m b6o tir
--2-0".
'' -
- Bdn trong bi6n v6 ch6ng L,: o'
1"1
(1s)
dgc N vd m6 men u6n M trong mdt cdt
ngang cOa v6 chdng xdc dinh theo [5] nhu sau:
|
^tii\
N="t
^le,\
,"t
_
^tin\ ^le\ bL,
M=:_!_____:_o
bt;
l16L
dcfAv: a=R^-R
- chi6u
=nlr-lL
"\. Ro
dly v6 chdng;
t6 thi c6ng l5p dqtng v6 ch6ng cho hdm
c6 thd ti6n hinh truc ti6p ngay 6 gr,long diro
v6i lo = 0 hodc ldp dqng v6 ch6ng chqm hon
vdi khoang c6ch tr6 ld /o * 0 tinh tr)I guong ddo.
Trong trurdng hop niy dd thi dd xdc Cfinh trang
thiii cAn c0a h€ h6 "v6 ch6n9-kh6i ddt dd" nhtt
tr6n hlnh 4.
.
,
('15)
"=
'
|
2G'
'/
- dich chuydn bi6n hdm.
Kdt qu6 tim dugc tr6n ddy phir hop vdi ldi 9i6i
c0a biri todn phSng quen thu6c khi hdm Cfutoc
xem l) 16 kho6t trdn khdng l5p dqng v6 ch6ng
b6n trong.
Nghidn cr?u su tdn tai dich chuydn bi6n hdm
vdi su phu thudc khodng cdch tfdn guong hdm
c6 nhi€u tbi li€u dd cap nhLlDavuid6p N.A.
v) Baydendischen M. t1 11. Ldi gi6i phir hop
vdi bii todn coa lyi thuydt din hdi vdi viQc 6p
dung phuong ph6p s6, phr,long phdp phdn trlt
hrtu han. Kdt qu6 nghi6n ctlu c0a Baudendisten
M., GS. Bunuichep N.S., [3J cho ph6p r(t ra m6i
li6n hA gi0a giii tri o- v) kho6ng c5ch tuong d6i
/o/Ro ddn gtlong cfudng hdm theo tudng quan
bing d0 dii
v)o bi6u thfc
M=-tuRi
('16),
0]
him m0
b(r!-\'
R"/
" I
'l,*t'|
( &l
'
[1
nh4n dugc:
f.,Ri )
9&rl "'t"' L
u(/.)
u(4) .
"' u(-)-.( n"yu \ ,ula1=RolH
2Go
dcl6v: f{/^t=
di
I
)
gia tri b ldy
tlonvi ddi,b=1m.
Thay bidu thrlc (14) vir
(21)
Thuc
R;
Lr,Ic
oreuKren:P
sau:
(
a- -0.64
'I
e
.,.t"/
-'Ro \
(17\
Cin
cr,l
vdo N vd M x5c dinh theo
(1
7) c6 thd
(24)
Hinh 4. Xiic dinh trang thiii cdn bing hQ"vd chdng-khdi diit dii"
kidm tra d0 bdn c0a v6 ch6ng tren mdt c6t
khi ldp dqng v6 chdng vdi khodng ciich lotilguong.
Til dAy cho ph6p rrit ra sr.t phu thuQc dd didu
chinh fng sudt ban afdu:
ngang.
Ching hqn, di6u kiQn bdn v6 ch6ng vi6t drrdi
dang [9]:
wl< Ns.
(1 8)
gidi han kh6 ning mang t6i crla mit
cit v6 ch6ng lirm bing be t6ng c6 cuong efQ
d ddy: N5 -
chiu n6n l) R' x5c clinh tU bidu thric:
xs=m,rc(t-=);6v *=t, * =l#l
-ttQ l€ch t6m c0a lqlc dgc N.
Srldung bidu thrlc (1 7) vd bi6n cldi cho ta:
f
rs
= r
-.39r)
=
*,u
(
'
.412+
1_R,
R,)
!|
Ro'J
lI
t"lr[r*4'J
\.
'
R6'
thing
thd hiCn dd thi trang
thdi cdn bing gia c6 dudng hdm; dtlong thSng
2 - dd thi trang th6i c6n bing cOa v6 ch5ng, 15p
dung v6i khoing cdch tr6 /^ tiJ gudng. Didm A
Trdn hinh 4 drtong
7
-
giao didm dd thi tudng fn! vdi trang thdi cAn
bing cOa hQ "v6 ch6ng-kh6i ddt d6': Dd so siinh
ctuong thing 3 (ttlldng n6t dr-tt) cho thdy d6 thi
c6n bing trqng th6i v6 ch6ng ldp dr,tng ngay
trdn guong; didm B - giao di6m d6 thitrang th6i
c6n bing vdi trudng hgp l5p dung tr6n guong.
Phdn dich chuydn kh6i ddt d5 u(/o) trudc khi tidn
hinh l5p drrng v6 ch6ng vdi kho6ng ciich tidn
gudng I dugc thd hi6n tr6n dd thi bing doqn
OO". N6u duong hdm cdn lai kh6ng gia c6 k6o
dai thdi gian (di€u chinh kho6ng c5ch d6ng
kd v6 ch6ng tir gudng khi nio /o -+ -), chuydn
dich kh6ng gia c6 dt-tdng hdm khi d6 ld: u(-) =
yHR/2G0.
(1e)
Inay ( ry) vao ( ru) va oe y oen
giii ra cho:
(|
/l/
oren oor va
l,'-4.)l.,.t]
o=o^a8kR,\ R6l\ R,j l.
3b (^
ni )'
I J+--:
(.
I
R;l
(20)
6 ddy: P" - gidi han 6p hlc, dp luc mi v6 chdng
driu drtgc nhung kh6ng lirm t6n thdt kh6 ning
mang tdi.
dtrdng thSng 2 tr6n h)nh 3 di6n t6
trqng thdi cdn bing cOa v6 ch6ng bA t6ng;
Trdn hlnh 4 cho thdy ring sr.t ch6m 15p dung v6
ch6ng trigudng hdm se ldm gi6m dp luc d6n
v6 ch6ng, t(c l) c6 didu kiAn P < P. Trong co
hoc c6ng trinh ngdm [7] dd ttnh hi€u qu6 didu
d6 srl dung bidu thrlc: P = P-a- hoac a. = P/F.
(22)
Xdc dinh o'c6 thd tidn hinh bing ciich x6t cdc
tam giSc d6ng dang (tr€n h)nh 4 cho th6y c6c
tam gi6c ddng d4ng AEF vi OBF; O-AD vit OBE
til cl6 r(t ra:
. P AD o'A oF oo' u(o)-ut/") . ultrt , ,,,
A =- =
,(-)
,(-)
P BE OB OF
)
Nhr-t vqy,
d-(0)(0)
=-yHa'
-d.(0x0)
2. Kdt luen
- Khi giim chi6u
qi6m qid tri
^=R^
,
".11,,0,=O
.
diy v6 ch6ng dudng
-n,
(25)
hAm, trlc
=a[r-&]
"l Ro ) thi hJcdocNva
m6 men u6n M trong mat c5t ngang v6 ch6ng
thrlc (16)). Khi R, -+ R0 thi A
-+ 0, d5n d6n N = 0, M = 0 vir do d6 6p h.rc c6
s6 gi6m (theo c6ng
go+0.
-Trong cfdt rdt y6u th6a min tfi€u ki6n G, >> Go,
(G, - m6 cfun bi6n dang cOa vit liQu v6 ch6ng;
Go - m6 cfun biSn d4n9 c0a ddt, vi do ddt rdt y6u
ndn Go rdt nh6); khi tl6 c6 thd xem GolG, -+ 0,
do d6 qo ti6n d6n gi5 tri rlng sudt ban cldu trong
kh6i ddt .16, tfc la qo+ yH.
- Khigi6 tri /o cirng ldn, tr,?c li dr;ng 15p v6 ch6ng
tr6 hon, khdng l5p durng ngay v6 ch6ng khi m6
hdm mi ta dd bien ddt d;i dich chuydn tr,l do
mQt thdi gian to fng v6i kho6ng c6ch tr6 /o thi
6p h.rc t5c dung lAn v6 ch6ng giim, dich chuydn
c0a v6 ch6ng s6 tdng.
- Tit d6y c6 thd r(t ra rlng dung thqc ti6n nhLI
sau:
+ Sf dung k6t cdu ch6ng mdm, linh hoat kich
lim gi6m tai l6n k6t cdu;
k6t cdu ch5ng crlng, c6 sq dich
chuydn nh6, s6 l)m ting t6i tdc dqng l6n kdt
thr-tdc sE
+
Sr1 dr,rng
cdu;
(23)
+ N6u sau khi ddo mir ti6n hinh dr;ng l5p v6
7.2017 xffiEuNG
227
chdng ngay thi t6i trong tdc dqng l6n k6t cdu
tang;
+ N6u sau khi diro ta d6 bi6n hdm bi6n dang tU
do mQt thdi gian t0 fng vdi kho6ng c6ch tr6 /o
m6i ti6n hirnh dr,lng l5p v6 ch6ng thi t6i trqng
t5c dr,rng l€n kdt cdu s€ 9i6m.
TAI TITU THAM IHAO
[1]. Vo Trong Hirng, Phlng Manh Ddc. Co hoc tl6 rlng dung trong
x6y dung cdng trinh ng6m v) khai thiic m6 NXBKHKT. Hit NQi,
2008,
(d hgc dii. NXB Xay dung. Hir NOi, 2006.
[2]. Nguy6n Quang Phkh.
(o hoc d6. NXB Xay drng. Hi N0i, 2004.
[3]. Nghi0m H[u Hanh.
[4]. Nguy6n 5i Nggc. Cd hqc dii. Nhir xudt bin giao th0ng vqn
t;i, H) Noi,2005.
[5]. Polr,rx
14.8. [ttuuaeman Harpy3Ka
il
ropHoe AaBneHile.
14ccnegoearun roptoro gasneruR. - M.: locroprexu3Aar, 1960.-
c.343-374.
[6]. Sarnauoe 14.B., Kapro:r.rr 6.A. Mexanuxa noA3eMHblx
coopyxeruft n rorcrpyrrluu xpenett. M.: Henpa, 1984. - 324 c.
[7]. 6ynurqee H.(. lVlexatr,xa noA3eMHblx coopyxenr,ll: he6.
4nr eyroa, - 2-e u:g., nepepa6. r,r 4on. - M.: Hegpa. -1994. 382
C.
l8l. Caltynr
8.14. OcHoeut
Teopil[ ynpyrocTt4 u
nnacT[qHocTl4.
Yqe6. floco6ue Anr cTyAeHToB eyroa. M.: Butcur. uxona, 1982.
-264
c.
t9l.
Pyxoeogcreo
roprux aurpa6orox td
flo
npoeKr[poBaHiln
noA3eMHblx
pacqeTy rpenr,r. BHI'lMl4, BHl4l/0MlllC
Murymenporvra (C(P.- M.: Crpor,rr,r:ga1 1983. - 273 c.
[10]. Aasuraoea H.A. flptt6ruxerroe peuJeHle 3aAaqu 0
cMeueHilrx noBepxH0cTt4 6ecroleqlot'l liunIHApt4qecKoI
noJlocr[, 3alpyxeHHoi xecTKl4lil KotlbqeBblM uraMn0M
xoreqrofi nnnrul. OTnPflil. - 1968.-
Ne3.
- c. 111-1'l7.
[11]. Baudendistel M. Zum Entwurf von Tunnellen mit grossen
Ausbruchsquerschnitt. Rock Mechanics. - 1979. - 5uppl. Ne 8. - p.
95-100.
