Phân tích kết cấu bộ phận công tác của thiết bị khoan - phun - trộn cọc xi măng đất

Phan tich ket cau bo phan cong tdc

caa thiQt bj khoan - phan - tron coc xi mang ddt

PGS.TS. Nguyin H6ng Ngdn', ThS. Huynh Cdng Ldn", ThS. Trdn Cdng TriS

'Bd mdn Cd gidi hda Xi nghiep Xdy dflng, Khoa Cd khi, Trfldng Dai hpc Bdeh khoa TR HCM

^Bd mdn May Xay dflng, Khoa Cd khi, Trfldng Dai hpc Giao thdng Vdn tdi TP HCM

TOM TAT

Bdi viet trinh bdy scf lUdc vi gidi phdp xii ly nin ddt yiu bdng cgc xi mdng ddt. Phdn tich dnh

hudng cua kit cdu bg phdn ldm viic din chdt lUdng cgc xi mdng ddt. Tii do dUa ra kit cdu ldm viec phii

hdp vdi diiu kien tU nhiin cua Viet Nam, dong thdi, dUa ra cdc thong so ky thudt cua cong nghi cgcxi

mdng ddt dp dung trong nhiing diiu kien ddt khdc nhau.

I. DAT VAN DE 2. TONG QUAN VE CQC XI MAN G DAT

Nhilu cdng trinh xdy dflng cua nfldc ta 2.1. Gidi thieu chung

dfldc thflc hiln trln nln dat ylu. Di xdy dflng can

phdi tiln hdnh xfl ly nln mdng sao cho hilu qua Cpc xi mang dat (hay cdn gpi Id cpt xi

va tilt kilm, phu hpp dilu kiln kinh tl - ky thudt mang dat, tru xi mdng dat) - (Deep soil mixing

cu thi. Mdt trong nhflng phfldng phdp xfl ly nln columns, soil mixing pile), la mdt cpc hinh tru

yeu hilu qua Id dung cpc xi mdng dat khdng cd cdt trdn tao thdnh bdi hdn h ^ dflpc trdn diu gifla

thep. dat nguyin trang vdi xi mang dfldc phun xuong

nln dat bdi thilt bi khoan - phun.

Cdng nghe thi cdng tao cpc xi mdng dat

dflpc dp dung d nfldc ta chfla Idu, nhilu van dl Qud trinh thi cdng tao thdnh cpc xi mang

vl ly ludn vd thflc tiln van cdn chfla dflpc nghiln dat dung phfldng phdp khoan trdn sdu. Sfl dung

cflu day du, dac bilt la nhflng nghiln cflu vl kit mdy khoan vd cdc thilt bi chuyin dflng (can

cau cua bd phdn lam viec - mdt trong nhflng ylu khoan, mui khoan...), khoan vdo dat vdi dfldng

td anh hfldng ldn nhat din chat Iflg'ng cua cpc xi kinh vd chilu sdu Id khoan theo thilt kl. Dat

mang ddt. trong qud trinh khoan khdng dfldc lay lln khoi lo

khoan ma bi phd vd kit cau, dfldc cdc canh mui

Vdi nhflng xu thi dd, viec nghien cflu gidi khoan nghiln tdi, trdn diu vdi chat kit dinh (chat

quylt van dl vl kit cdu cua bd phdn lam viec dl kit dinh thdng thfldng Id xi mang hoac vdi, thach

phu hdp vdi dilu kiln tfl nhien cua nfldc ta la hit cao... ddi khi cd thlm chat phu gia va cat),

sflc can thilt.

TAP CHf CO KHf VlfiT NAM • Sd 03 (Thang 3 nam 2012)