Indlela Yokuhlola Amandla Ezinto Zomhlabathi
Ukuhlolwa kwamandla enhlabathi kuyisinyathelo esibalulekile ekuhleleni nasekusetshenzisweni kwamaphrojekthi ocwaningo lokwakha, ezolimo, kanye nolwe-geotechnical. Inhlabathi iyinto ehlukahlukene, enezakhiwo zemishini ezihlukahluka kakhulu kuye ngezimo zemvelo, ukwakheka kwezimbiwa, kanye nomlando we-geological. Ngakho-ke, ukuqonda amandla ezinto zenhlabathi kubalulekile ukuqinisekisa ukuzinza nokuphepha kwezakhiwo ezakhiwe phezu kwayo. Lesi sihloko sizoxoxa ngezindlela ezahlukene zokuhlola amandla enhlabathi kanye nokusetshenziswa kwazo emikhakheni eyahlukene.
1. Ukubaluleka Kokuhlolwa Kwamandla Ezinto Zomhlabathi
Ngaphambi kokuxoxa ngezindlela zokuhlola, kubalulekile ukuqonda ukuthi kungani ukuhlolwa kwamandla enhlabathi kubaluleke kangaka:
1. Ukuphepha Kwesakhiwo: Ukwakha izakhiwo, imigwaqo, namabhuloho konke kudinga isisekelo esiqinile. Inhlabathi, njengesisekelo, kumele ikwazi ukusekela umthwalo ngaphandle kokucwila noma ukudilika.
2. Ukuzinza Kwethambeka: Ezindaweni ezinamagquma noma ezintabeni, ukuzinza kwethambeka kuncike emandleni okucheba kwenhlabathi. Inhlabathi ebuthaka ingabangela ukudilika kwenhlabathi.
3. Ukusebenza Kahle Kokwakha: Ukwazi amandla enhlabathi kuvumela ukuhlela okungabizi ngokukhetha amasu nezinto ezifanele.
2. Indlela Yokuhlola Ukuqina Kwezinto Zomhlabathi
Izindlela ezahlukene zokuhlola amandla enhlabathi ziye zasungulwa ukuze kulinganiswe izakhiwo zenhlabathi. Nazi ezinye zezindlela eziyinhloko ezivame ukusetshenziswa:
a. Ukuhlolwa Kokungena Okujwayelekile (i-SPT)
Ukuhlolwa kokungena okujwayelekile kungenye yezindlela ezaziwa kakhulu zokuhlola amandla enhlabathi. Le nqubo ihilela ukushaya ishubhu lesampula enhlabathini ngesando. Inani lokushaywa okudingekayo ukufaka ishubhu enhlabathini lifinyelele ekujuleni okucacisiwe (ngokuvamile okungu-30 cm) lisetshenziswa njengesibonakaliso samandla enhlabathi. Le nqubo ilula kodwa inikeza ulwazi olubalulekile mayelana nobuningi namandla enhlabathi enama-granular.
b. Ukuhlolwa Kokucheba Okuqondile
Ukuhlolwa kwamandla okusika okuqondile kusetshenziselwa ukukala amandla okusika enhlabathi, okuyikhono lenhlabathi lokumelana namandla abangela ukufuduka. Kulolu vivinyo, isampula yenhlabathi ifakwa ngaphakathi kwebhokisi lokusika, bese kusetshenziswa amandla ngokuvundlile kuze kube yilapho inhlabathi yehluleka. Imininingwane evela kulolu vivinyo ingasetshenziswa ukuthola ukuhlangana kanye ne-engeli yokungqubuzana kwangaphakathi kwenhlabathi.
c. Ukuhlolwa kwe-Triaxial
Ukuhlolwa kwe-Triaxial kuyindlela eyinkimbinkimbi kakhulu kodwa inikeza ulwazi oluningiliziwe mayelana nezakhiwo zenhlabathi. Kulolu vivinyo, isampula yenhlabathi ifakwa esitokisini se-triaxial bese icindezelwa ngokulinganayo kuzo zonke izinhlangothi (ingcindezi yokuvala). Ingcindezi eyengeziwe ifakwa nge-axial kuze kube yilapho inhlabathi yehluleka. Lolu vivinyo lungenziwa ngaphansi kwezimo ezahlukene zokukhipha amanzi ukuze kulingiswe izimo ezahlukene zensimu, njengokuhlolwa kwe-triaxial okuhlanganisiwe (i-CD), okungahlanganisiwe (i-UU), kanye nokuhlolwa kwe-triaxial okuhlanganisiwe (i-CU).
d. Ukuhlolwa Kokucindezela Okungavinjelwe
Ukuhlolwa kokucindezela okungagodliwe kusetshenziselwa ukukala amandla enhlabathi yobumba engagodliwe. Isampula yenhlabathi esilinda icindezelwa nge-axial kuze kube yilapho yehluleka. Ngenxa yokuthi akukho ngcindezi yokuvala esetshenziswayo, lokhu kuhlolwa kunikeza ulwazi ngamandla okucindezela enhlabathi ngaphansi kwezimo ezingakhiphi amanzi.
e. Ukuhlolwa kwe-CBR (California Bearing Ratio)
Ukuhlolwa kwe-CBR kuyindlela evame ukusetshenziswa ukuhlola amandla okuthwala inhlabathi ekwakhiweni komgwaqo. Kulokhu kuhlolwa, i-piston icindezelwa enhlabathini ngesivinini esithile, bese kulinganiswa ukumelana kwenhlabathi. Inani le-CBR libalwa njengesilinganiso sokumelana kwenhlabathi nokumelana kwezinto ezijwayelekile. Inani eliphezulu le-CBR libonisa amandla amahle kanye namandla okuthwala.
f. Ukuhlolwa Kokungena Kwekhoni (CPT)
Ukuhlolwa kokungena kwekhoni kuyindlela ewusizo esebenzisa ikhoni ukuhlola amandla enhlabathi angaphakathi. Ikhoni idonswa enhlabathini bese ukumelana okukhona kuqoshwa ngokujula kokungena. Imininingwane evelayo ingasetshenziswa ukuhlola iphrofayili yenhlabathi kanye nezakhiwo zayo zemishini.
3. Ukusetshenziswa Kwezindlela Zokuhlola
a. Ukwakhiwa Kwezakhiwo
Kubunjiniyela bezokwakha, imiphumela yokuhlolwa kwenhlabathi isetshenziselwa ukuklama izisekelo zezakhiwo, imigwaqo, kanye nezinye izingqalasizinda. Isibonelo, ukuhlolwa kwe-SPT kanye ne-CPT kuvame ukusetshenziselwa ukuhlola ubuningi namandla enhlabathi yesihlabathi, kuyilapho ukuhlolwa kwe-triaxial kusetshenziswa enhlabathini yobumba enokuziphatha okuyinkimbinkimbi kakhulu.
b. Ezolimo
Kwezolimo, ukuqonda amandla enhlabathi kubalulekile ekuphathweni komhlaba, ekuniseleni, nasekusetshenzisweni kwemishini esindayo. Inhlabathi enamandla aphansi okucindezela ingaba nokuminyana ngokweqile, kuncishiswe ukungena kwamanzi kanye nokukhula kwezimpande zezitshalo.
c. Ucwaningo Lwezobuchwepheshe Bezwe
Izindlela zokuhlola inhlabathi zisetshenziswa kabanzi ocwaningweni lwe-geotechnical ukuhlola izakhiwo eziyinkimbinkimbi neziguquguqukayo zenhlabathi. Lolu cwaningo luhlanganisa ukuhlaziywa kokuqina kwethambeka, impendulo yenhlabathi ekuzamazameni komhlaba, kanye nezinguquko ezakhiweni zenhlabathi ngenxa yokushintsha kwesimo sezulu kanye nemisebenzi yabantu.
4. Isiphetho
Ukuhlolwa kwamandla enhlabathi kuyisici esibalulekile emikhakheni eyahlukene, ikakhulukazi kwezokwakha, ezolimo, kanye nocwaningo lwe-geotechnical. Izindlela okuxoxwe ngazo kulesi sihloko, njenge-Standard Penetration Test (SPT), i-Direct Shear Strength Test, i-Triaxial Test, i-Unconfined Compression Test, i-CBR Test, kanye ne-Cone Penetration Test (CPT), zinikeza izindlela ezahlukahlukene kodwa ezibalulekile zokuqonda amandla nezici zemishini zenhlabathi.
Ngokwenza ukuhlolwa okufanele kwamandla enhlabathi, onjiniyela nososayensi bangaklama izakhiwo eziphephile, basungule izindlela ezifanele zezolimo, futhi benze ucwaningo oluphelele lwe-geotechnical. Lolu lwazi ekugcineni lusiza ekwakheni indawo ephephile nehlala isikhathi eside.
Ngokuqonda kangcono amandla enhlabathi, singanciphisa ingozi yokwehluleka kwesakhiwo, sithuthukise ukusebenza kahle kokwakha, futhi siqinisekise ukuthi umhlaba usetshenziswa ngendlela ekhiqiza kakhulu neqhubekayo.
