Nghiên cứu thực nghiệm xác định vùng đất chịu ảnh hưởng lực đầm dưới bánh lu rung

NGHIEN CU'U - TRAO OOl

NGHIEN CLTU THLPC NGHIEM XAC DjNH VON G DA T

CHIU ANH HU'dNG LLTC DA M DU'O'I BAN H LU RUNG

EXPERIMENTAL STUDY TO DETERMINE THE SOIL AREA EFFECTED BY THE FORCE

OF A VIBRATION ROLLER

TS. TVan Hiru Ly

Hgc vien Ky thudt Qudn su

r6MTAT

Co the gidi bdi todn truyen song de xdc dinh vung dnh huong ciia trong Idn thdng qua viec

:dc dinh do sdu md a do cuang do hdp thu ndng lugmg rung ciia ddt bang khong. Tuy nhien, de gidi

mi toan trt^en sdng trong ddt dam, cdc md hinh da chdp nhgn gid thiet ve mdi truang vd rdng buoc

hem mdt sd dieu kien bien, kit qud nhgn dugc da cd nhung sai sd nhdt dinh. Bdi bdo dd xdy dung

zasa ly thuyet, md hinh vd quy trinh thuc nghiem de xdc dinh vung ddt chui dnh hudng cua lifc rung

idng duai bdnh lu cua mdy lu rung tu hdnh cd ke din yeu to di chuyen cua mdy. Kit qud nghien cuu

fdxdc dinh dugc phgm vi dnh hu&ng vdphdn bd dp h^c dam theo chiiu sdu.

Tir khoa: Vung dnh huong, trdng lan, mdy lu rung, van tdc, thuc nghiem.

^STRACT

It is able to apply the wave propagation problem to estimate the space compaction of a drum

Ty determining the depth that specific absorbing compaction energy is null. The problem of wave

propagation in soil, however, include some idealised parameters of soil and boundary conditions.

'Consequently, it could be that there are certainly unacccuracy in the receiving results This article

iresents therorical, modeling and process of an experiment to determine the efficient conpactimi

pace of a self propelled roller incoporarion of the moving speed. The results of this work indicated

he efficient conpaction and the varying of dynamic pressures at different depths.

Keywords: Efficient compaction space, self propelled roller, moving speed, experiment.

I. BAT VAN DE dam [1,5,6]. Phuang phdp rung mat thudng

dugc sii dung de lam chat ndn dudng, ndn cdc

Dat sau khi dap cho cdc cdng trinh phai cdng trinh xay dung, hidu qud lam chat tu 0.5

luge In ddm de ddm bdo do chat edn thiet, chdt -^Im. Luc rung tde dung Idn vat lieu, gay ra

ugng lu ddm dugc xdc dinh bdi hai ydu td la hieu ling di chuydn rung lam vdt lieu bi len

y Irgng vd md dun bidn dang ciia ddt. Cdc ydu chat lai. Rung ddng 1dm cho luc ma sat va luc

d anh hudng d6n chdt lugng dim cd thd kd dinh giiia cac hat vat lieu gidm di, eac hat vdt

ten la luc ddm, do dm, Ihdi gian ddm, sd lugt lieu dao ddng theo phuang thing diing toi vi"^

ISSN 0866 - 7056

TAP CHi CO KHl VIET NAM, Sd 1+2 nam 2017