Siab khib nyiab nyob rau hauv cov xwm

khoom hauv lub xeev siab - nws yog feem ntau cov thawj builders ntawm tus yeeb ncuab. Vim lub fact tias muaj yog ib tug siab ntawm cov khib nyiab, nws yog tsis yooj yim sua mus nqa tawm ib co tej yaam num nyob rau hauv tus. Interestingly, lub ancient, on qhov tsis tooj enjoyed cov cuab yeej, cov zoo kawg li vaj tse. Pyramids thiab ntau lwm monuments ntawm architecture - tag nrho cov no yog cov kev tshwm sim ntawm zog ua hauj lwm nyob rau hauv tsim zoo kawg li masterpieces. Xav txog hais tias xws li siab txheeb ze mus rau khib nyiab.

Pom txawm nyob rau hauv cov lub sij hawm lub siab khib nyiab mis muab:

P = F / S,

ie tus quab yuam sawv rau ntawm qhov chaw yog hais txog txoj kev siab.

Nws yuav tsum tau muab sau tseg tias nyob rau hauv qhov tseeb, lub siab quab yuam ntawm lub cev yog ib txwm zoo thiab siv tau nyob rau hauv ob qho tib si qhia. Ntawm no ua hauj lwm Newton tus thawj txoj kev cai - lub hwj chim ntawm kev txiav txim ncaj rau tus quab yuam ntawm kuj. Muaj feem xyuam rau lub neej - lub siab sib sib zog tsa los ntawm tus luj ntawm lub tsev, nws yuav tsum yog tib yam rau qhov qis dua khaubncaws sab nraud povtseg thiab foundation. Yog li ntawd, designers, builders yeej ib txwm cia siab tias Will lub hauv paus ntawm ib lub tsev. Ntawm cov hoob kawm, qhov no xam muaj xws li lwm yam (cua quab yuam - los ntawm lub-ru tsev, hauv qab av, seismic yam kev ua si thiab li ntawd.).

Vim li cas kuv xav tau ib tug neeg mus rau disperse koj qhov ceeb thawj tshaj ib tug loj nto? Thiab ces xav seb ib rab koob los yog ib tug riam. Ob leeg muaj ib tug ntse ib feem, kom zoo allergic muaj peev xwm ua. Tam sim no nco ntsoov skiing thiab khiav-hom tsheb laij. Caij ski tsis poob mus rau hauv cov daus, thiab tsheb laij yog zoo tus ntoo khaub lig los ntawm lub swamps, raws li lawv muaj ib tug loj hu cheeb tsam - mus rau ib tug tsawg imbeddability. Qhov no qhia qhov yooj yim mis qhia siab khib nyiab - nrog rau tib lub hwj chim, tab sis cheeb tsam sib txawv, lub siab yuav sib txawv. Nws yog inversely xwm yeem mus rau square. Xws li tus loj dua cov cheeb tsam, ntau dua qhov lub siab. Thiab vice versa.

Tam sim no rov qab mus rau lub builders. Vim li cas lawv siab - ib tug loj mob taub hau? Tag nrho cov teeb meem nyob rau hauv tib cheeb tsam. Tom qab tag nrho, lub check cov ntaub ntawv uas, li ntawd, nws yog nyuaj. Xav hnyav qhob slabs-sib tshooj. Ntawm cov hoob kawm, nyob rau hauv peb lub sij hawm, muaj ib tug ntau ntawm muaj zog, khaub-ncaws nyias cov ntaub ntawv. Tab sis nws tsis yog tag nrho ib qho yooj yim. Tej kev txua project yog kwv yees li profitability. Thiab yog hais tias tus nqi ntawm xws super-ntaub ntawv yog high school, thiab kev tsim kho nqi kwv yees yuav loj. Raws li ib tug tshwm sim, ib tug neeg tsis rub lub nyiaj txiag los yog lub project yuav them tawm rau ib ntev lub sij hawm. Tab sis peb tau hais tias saum toj no, hais tias cov ancients siv lub siab ntawm cov khib nyiab nyob rau hauv lawv cov haum.

Nyob rau hauv cov hnub, siv cov ntaub ntawv es txwv nyob rau hauv ntau yam thiab nyob rau hauv kom muaj nuj nqis. Tom qab tag nrho, lub tsuas kev lag luam tsis yog, thiab lub pob zeb carved los ntawm txhais tes. qhob los yog mortar twb tseem tsis ntaus coupling ntsiab. Nws yuav tsum tau muab siv es tsis txhob ntawm attaching lub siab khib nyiab. Qhov tseeb yog hais tias tus loj dua cov siab, tus loj dua cov yuav tsum tau lub dag lub zog ntawm cov ntaub ntawv. Tiam sis nyob rau lwm cov tes, qhov no yog ib tug zoo kawg frictional quab yuam. Thiab nws yog lub npe hu, yuav ua rau ib tug loj loj sib txawv. Raws li ib tug tshwm sim, peb pom tias tus kho vajtse twb tsis xav tau, txhua yam so nyob rau hauv kev quab yuam ntawm lub ntiajteb txawj nqus thiab cov frictional quab yuam.

Tam sim no xav txog tej yam yuav ua li cas npaum li cas siab muaj ib tug tsheb ciav hlau nyob ntsia - 300000 kPa !!! Thaum ib tug siab ntawm tshwj xeeb crawler tsheb laij teb - 20 kPa. Heev ib qho kev nthuav taw tes, nws yuav zoo li, qhov hnyav hav iav tsheb laij teb, tsim ib tug kuj tsis tshua muaj siab rau hauv av. Qhov no tso cai rau nws rau koj tsiv nyob ib ncig ntawm lub rhuav txhua thiab marshland vim wider khiav. Yog hais tias peb hais txog cov saum toj no-hais tsis sib haum xeeb, nws yuav ua tau ntau hom thiab yog muab los ntawm:

F = μ × N, [H]

qhov twg F - frictional quab yuam [N]

μ - kev sib txhuam coefficient

N - ib txwm tshuaj tiv thaiv [H].

Lub quab yuam ntawm siab raws li tau pom, muaj ob zoo thiab tsis zoo cov ntsiab lus. Xwm tau nruj heev heev rau no phenomenon. Cov neeg los ntawm cov ingeniously yooj yim siv tsiv mus rau cov invention ntawm cov ntaub ntawv tshiab thiab technologies. Xws li ib tug tshwm sim nyob rau hauv qhov thiab tau nws yuav tsum reckoned nrog.