Kev siv cov granite hauv cov qauv choj tuaj yeem muab faib ua ob theem: ua ntej, nws yog siv ncaj qha raws li lub pob zeb ntuj hauv cov khoom siv choj; thib ob, nws cuam tshuam tus choj foundation tsim raws li ib tug geological bedrock. Cov hauv qab no yog ib qho kev qhia txog kev ua haujlwm ntawm kev ua haujlwm engineering.
I. Kev siv Granite ua cov khoom siv
Granite yog lub pob zeb uas tsis muaj zog nrog qhov ceev (kwv yees li 2.6-2.7 g / cm³), siab compressive zog (100-250 MPa), muaj zog hnav tsis kam, tsis tshua muaj dej nqus, thiab huab cua tsis zoo. Hauv choj engineering, nws feem ntau yog siv rau hauv cov hauv qab no:
1. Choj Deck Paving thiab Crash Barrier Facing
Nyob rau hauv txoj kev loj choj, granite feem ntau siv rau kev kho mob ntawm kev sib tsoo teeb meem (guardrails). Piv txwv li, kev sib tsoo thaiv kev tsim ntawm Changshanbao Grand Choj (1797.52 meters ntev) ntawm Shenyang-Jilin Expressway siv granite ntsib, zoo daws cov teeb meem ntawm npuas nto, honeycomb pitting, thiab lub caij ntuj no ntsev corrosion ntawm tsoos pob zeb tsoo teeb meem, ho txhim kho kev tsim kho thiab tsos.
2. Choj railings thiab cov khoom siv kho kom zoo nkauj
Granite, nrog nws cov zoo nkauj thiab ruaj khov zoo nkauj, yog dav siv nyob rau hauv railings, kem, thiab lawj kho kom zoo nkauj ntawm nroog txuas hniav. Nyob rau hauv lub nroog loj txoj kev ntawm Lijiang City, granite yog siv rau paving choj decks, tsim choj railings, thiab kho kom zoo nkauj piers, bears ntev - lub sij hawm loads ntawm tsheb thiab neeg taug kev thaum txhim kho lub nroog toj roob hauv pes.
3. Pier Foundations thiab Retaining Wall Structures
Granite blocks lossis slabs tuaj yeem siv los ntxiv dag zog thiab tiv thaiv tus choj pier foundation, tshwj xeeb tshaj yog nyob rau hauv ntug dej hiav txwv lossis siab - thaj chaw av noo. Lawv cov tshuaj ruaj khov muaj txiaj ntsig zoo tiv thaiv chloride ion yaig thiab acid / alkali corrosion, tiv thaiv steel reinforcement corrosion thiab txuas tus choj txoj kev pab cuam lub neej. Tsis tas li ntawd, granite blocks feem ntau siv rau hauv kev tsim kho cov phab ntsa thiab kev tiv thaiv kab nqes hauv roob choj mus rau txoj kev ua haujlwm.
4. Cov khoom siv txhawb zog
Hauv kev txhawb nqa ntawm cov txuas hniav uas twb muaj lawm, granite slabs tuaj yeem siv los ua cov ntaub ntawv hauv ob sab phlu los yog pier cladding, txhim kho kev ruaj ntseg ntawm cov pob zeb nyob ib puag ncig thiab tiv thaiv kev puas tsuaj ntxiv rau cov qauv los ntawm dej yaig thiab huab cua.
II. Qhov cuam tshuam ntawm Granite Geological Bodies ntawm Choj Foundations
Hauv kev ua haujlwm ntawm geotechnical engineering, granite, raws li cov kabmob stratum, muaj kev txiav txim siab ntawm tus choj tsim qauv, feem ntau tseem ceeb tshaj qhov kev siv ntawm pob zeb nws tus kheej.
1. Xaus-Bearing Pile Foundations for Cross-Sea Bridges
Granite bedrock yog ib qho zoo tagnrho bearing stratum rau pawg kawg ntawm cov ntoo khaub lig loj - hiav txwv txuas hniav. Piv txwv li:
Lub Hong Kong-Zhuhai-Macau Choj: Lub hauv paus yog Yanshanian granite, ua haujlwm sib txawv ntawm tus ntoo khaub lig-section steel yeeb nkab puas pawg hauv paus, nrog qhov siab kawg ntawm pawg kab ntawm 2.5 meters thiab qhov siab kawg ntawm pawg ntev ntawm 137 meters, tsim raws li qhov kawg - kev sib tsoo.
Txoj Kev Pingtan Strait -Rail Choj: Lub ntug hiav txwv npog yog qhov ntiav lossis tsis muaj, lub hauv paus hauv paus yog granite, thiab cov dej qhov tob ntawm cov chaw pier yog tshaj 40 meters. Loj -inch dhuav cam khwb cia-hauv- qhov chaw pawg hauv paus yog siv, nrog lub siab tshaj plaws pawg kab ntawm 4.5 meters, tsim raws li kem- pawg hauv paus.
2. Geological Challenges ntawm Roob Choj
Kev tsim cov choj hauv granite- thaj chaw roob nplua nuj feem ntau nthuav tawm cov kev sib tw geotechnical engineering tshwj xeeb. Ib txoj kev tshawb nrhiav choj nyob rau thaj tsam roob ntawm sab qaum teb New South Wales, Australia, qhia txog qhov tsis sib xws ntawm granite huab cua txheej, zoo -tsim spheroidal weathering (pob zeb sib cais), thiab kev nkag mus ntawm cov pob zeb tsis muaj zog yuav tsum tau hloov kho rau lub hauv paus loj loj tsim, yuav tsum tau hloov lub hauv paus thiab micropile foundation. Qhov no tau ntxiv dag zog nrog cov phab ntsa hauv av thiab cov pob zeb tiv thaiv kev tiv thaiv kom ntseeg tau tias kev ruaj ntseg ntawm tus choj mus rau txoj kev thiab abutments.
III. Granite Crushed Khoom raws li pob zeb sib sau
Crushed granite yog ib qho siab -cov khoom siv dag zog zoo siv dav hauv choj pob zeb thiab asphalt sib tov. Nws lub zog siab thiab hnav tsis kam ua kom zoo dua qub ntawm tus choj lawj paving thiab pob zeb ua qauv. Mount Airy granite hauv North Carolina, Tebchaws Asmeskas, txawm tias tau siv los ua cov khoom siv hauv lub hauv paus rau cov haujlwm iconic xws li Washington World War II Memorial thiab Arlington Memorial Choj.
Granite plays ob lub luag haujlwm hauv kev tsim choj choj: ntawm ib sab, nws ua haujlwm ncaj qha raws li siab - pob zeb ua haujlwm zoo rau cov choj decks, railings, kev sib tsoo, thiab cov qauv zoo nkauj; ntawm qhov tod tes, nws ua hauj lwm raws li ib tug nyuaj bedrock, ua rau nws ib tug zoo tagnrho bearing txheej rau pawg thawj coj ntawm tus ntoo khaub lig- hiav txwv choj thiab roob txuas hniav. Nrog rau kev nce qib ntawm kev siv thev naus laus zis, kev siv cov khoom siv granite hauv kev txhim kho choj thiab kev txhim kho durability yog maj mam nthuav dav. Txawm li cas los xij, lawv tus kheej loj - hnyav thiab cov nqi ua haujlwm siab kuj yuav tsum tau ua kom muaj kev sib luag hauv kev tsim qauv engineering.