Hom 10 boring pawg tsav tsheb yog ib qho tseem ceeb ntawm cov cuab yeej siv rau kev kho lub hauv paus ntawm cov choj thiab cov tsev siab -nce. Kab lus no muab cov kev tshuaj ntsuam xyuas los ntawm plaub yam: kev xaiv cov khoom siv, txheej txheem tsim kho, kev daws teeb meem, thiab kev ua kom zoo dua qub.
I. Core Parameter Analysis#pib tsav tsheb ua haujlwm#
1. Fais fab thiab Drilling Capacity: Mainstream qauv muaj lub hwj chim lub taub hau ntawm 45-110kW, nrog dual- lub cev muaj zog configurations ua tau ib tug torque ntawm 48kN·m. Cov qauv siv hluav taws xob siab yog nyiam rau cov txheej av tawv. Drilling diameters li ntawm 400-1500mm, nrog rau qhov tob ntawm 10-30m, yuav tsum tau sib piv rau qhov ntev ntawm pawg tsim. Hauv thaj chaw cov av mos, qhov tob tob txhua hnub rau Φ800mm qhov tuaj yeem ncav cuag 28m. Rau cov txheej pob zeb nyuaj, yuav tsum muaj kev sib xyaw ua ke ntawm qhov drilling rig.
2. Kev txav thiab ruaj khov: Cov qauv taug qab muaj lub kaum sab xis ntawm 30 degree. Hydraulic taug kev qauv muab qhov tseeb qhov tseeb tab sis muaj zog tsis muaj zog. Tej yaam num nyob rau sab hnub poob toj roob hauv pes qhia tau hais tias plaub lub hydraulic outriggers tsim txo cov av siab los ntawm 42%, txo qhov kev co ntawm kev tsim kho.
3. Mud System Configuration: Ib tug av nkos twj tso kua mis nrog ib tug txaus tus nqi ntawm ntau tshaj los yog sib npaug zos rau 300m³ / h yog yuav tsum tau rau ib tug Φ800mm borehole. Lub peev xwm tsis txaus yuav ua rau lub sijhawm tu lub borehole los ntawm 1.8 npaug, cuam tshuam ncaj qha rau pawg zoo.
II. Txheej txheem kev tsim kho#pile tsav ua haujlwm#
1. Kev npaj kev tsim kho: Obstacles yuav tsum tau muab tshem tawm thiab lub site compacted. Lub casing qhov tob nyob rau hauv cov xuab zeb txheej yuav tsum ntau tshaj los yog sib npaug zos rau 2m, thaum nyob rau hauv av nplaum txheej nws yuav txo tau mus rau 1.5m. Hauv Tianjin qhov project, hauv av- nkag mus rau radar pretreatment txo cov cuab yeej siv sijhawm los ntawm 60%.
2. Kev tswj lub qhov dej: Cov av nplaum tshwj xeeb Tsawg dua lossis sib npaug ntawm 1.25, viscosity 18-20S, xuab zeb cov ntsiab lus Tsawg dua lossis sib npaug li 6%. Gravel txheej yuav tsum thickening rau phab ntsa tiv thaiv. Nyob rau hauv Nanjing Metro project, optimized formula txhim kho borehole phab ntsa stability los ntawm 58%. Drilling ceev yog tswj nyob rau hauv theem; nyob rau hauv Wuhan Yangtze River Choj qhov project, verticality sib txawv tau tswj tsis pub dhau 0.3%.
3. Kev Ntxuav thiab Grouting: Ob txoj kev tu kom huv si kom cov pob zeb tuab tsawg dua lossis sib npaug li 5cm, thiab cov yeeb nkab pib qhov kev taw qhia yog faus rau ntawm qhov tob ntau dua lossis sib npaug li 1m. Cov ntaub ntawv los ntawm Guangzhou super siab-nce qhov project qhia tau hais tias nruj me ntsis ua raws li ntau tshaj - cov qauv grouting tuaj yeem txo cov pawg taub hau tawg los ntawm 40%.
III. Fault Diagnosis
1. Kev tuav lub borehole collapse: me me borehole vau tuaj yeem hais los ntawm kev txhim kho av nkos; Kev tawg loj heev yuav tsum tau rov qab nrog av nplaum + cement mortar. Lub Jinan lub hauv paus qhov project siv C20 pob zeb backfilling, ua tiav 98% dhau tus nqi rau qhov thib ob drilling.
2. Drill Stuck Handling: Re-drilling nrog kev sib xyaw ntawm cov pob zeb thiab av nplaum yog siv. Txoj haujlwm Chengdu Metro tau siv lub zog saib xyuas los kwv yees qhov xwm txheej ntawm kev sib tsoo, txo qis sijhawm los ntawm 72 teev.
3. Qhia Pipe Blockage: Kev teeb tsa ntawm cov cuab yeej vibration thaum muaj xwm ceev tuaj yeem ua rau muaj kev vam meej ntawm kev tshem tawm cov blockage mus rau 92%, raws li kev txheeb xyuas los ntawm Shenzhen cross- sea choj project.
IV. Efficiency Optimization
Geological adaptation siv cov txheej txheem "rotary drilling + cuam tshuam", ua kom cov pawg ua tiav txhua hnub mus rau 4.8 hauv thaj chaw roob roob Guiyang. Txoj haujlwm Beijing tau ua tiav 83% rov siv dua tus nqi los ntawm kev kho av nkos siab pom, thiab Hangzhou kev lag luam qhov kev ntsuas qhov ntsuas - txuas kev tswj kom luv lub sijhawm rau pawg tsim ib lub cubic meter ntawm pob zeb rau 38 feeb. Cov txheej txheem kev ua haujlwm tau zoo tuaj yeem txhim kho kev ua haujlwm tag nrho los ntawm ntau dua 40% # pawg tsav tsheb ua haujlwm #
