Izimbotshelo zeAcrow: Ukuqala Ngokushesha, Ukuthuthwa Okukhulu

Ukuqala Ngokushesha Nangokwemiphumela KweAcrow Props

Ukuqala kahle kwe-Acrow props kugcininza ukusheshwa nokudala kwesithonga esihlobene nesikhathi. Isondlo se-2023 sibekwe ngu Isigaba Sombuso Wethempolari sifindela ukuthi izinhlelo ezisebenzisa izimo ezivamele ziqeda izikhathi eziphaziywa zi-41% ngelokhu kuyakhumbula ubumbano.

Inkcazelo Ephaqele kuthiwa Kwenza Izipropu zeAcrow Ngendlela Eshisayo Nangokukhanya

1. Sula indawo yokusebenza yomthwalo futhi qinisekise ukuthi izihlangothi ezilondoloza umthwalo zilengaphakade
2. Faka izibhodi zezibuko ukuze zilondolose umthwalo ngokulinganayo emhlabathini
3. Hlela ithiyubhu ephinde-phindayo kude kube 150 mm kuqhakazulu olithile
4. Londoloza ibhodi yasekhohlo usebenzisa ileveli yasidlo ukuqinisekisa ukulayisha ngokuphelele kwezinkanyezi
5. Sebenzisa izilungiselelo ezifanelekileyo ngokumechanismi wosobo olunqamlezileyo ukuze kutholakale konke okulayishwayo

Ukuvikelwa Kuphaya Nasezansi Iphlethe Ukunciphisa Isibindi

Iphlethe zomjane ufanele zikhiphe okungenani amaphara 3 athiwe, ngelixa iiphelethe zamakhoba ethu 8 mm zivikela ukugcwaliswa kwisikhala. Kwiindawo ezingavumelekanga, sebenzisa izikrweyithi ezinokutshintsha phantsi kwephlethe yomjane ukuze zenzeke ngenxa yezihlangothi ezingu-5°.

Isilinganiso Esifanelekileyo: Mangaki Imaprophi Acrow Ngomethe kuNye Ukuze Kuwusebenzi Okuphelele

Isilinganiso Sokulayisha (kN/m²)	Isilinganiso Seprop (mm)	Ububanzi Bephlethe (mm)
10–20	900–1200	5–6
20–35	600–900	8–10
35–50	450–600	12+

Vele ubuyele kule thebhu yokulayisha yomphathi wengcali kumodeli yakho eyithile yeprop.

Iintsuku Ezilungileyo Ukuba Kusetyenziswe Ngokushesha Kwaye Kuphuculwe Indlela Yokusebenza EsiGangeni

• Shenxela improphe ngemibala ngokusebenzisa izixhobo zokulayisha ngemipuqo yezibhamu
• Vula izigaba ngaphambi kokumiswa kumazwe okugcinwa kuyo ngenkathi ayisebenzi
• Sebenzisa amalayini wazelaseri ukumaka izindawo zokufaka kumadoda amakhulu
• Shintshana izigaba ngalinye i-90 yamaminithi ukuzivikela ukugcina isimo sokucoca kwizinto ezifanayo

Umdasiso wokusebenza kweTemporary Works Forum we-2023 ubonakala ukuthi izigaba ezisebenzisa lezi ndlela ngokuphathelene kumkhipha iziciro zokufaka iziphingo ngemizuzwana engu-27% ngaphakade kunemigaqo yesifuba.

Ukulinganisa Kwezakhiwo Nokukhetha Amakhasi Ngokulinganisa Ukusebenza Kwesivumelwano

Indlela okufakelwa ngayo kwe-telescopic kuvumela ukuba kube yimini okanye okhulu kweziciro ze-acrow props

Izenzo ezinikezelayo zisebenza ngokunquma iisthangi zezilika kwaye zibaniswe nezipini eziphathelene, zenzela ukuba ubeke ubude ngalinye elingama-50. Ingqalelo yonke iyakwamukela izikhalo phakathi kwezi-1.8 kuya kumazi-4.3 ngaphandle kokudinga kwezinto ezongeziweyo. Xa abasebenzi abakhethayo kufuneka banyuse isithuthi sesandla, basekunye umthambeka waphakade wayo usebenzisa iphini enegunya. Oku kwenza kube lula kukho konke okuhlala kumgangatho nokuba ziziphi na iindlela ezingavumelekanga okanye iizikhampani. Iimodeli ezininzi zifumaneka ngezixhobo zezibhase ezingavumela ukubuyisela kwiimi-15, okusiza ekulungiseni imiphazamo encinci kwizikalo zabuciko.

Ukukhetha ubungakanani be-acrow prop ngokulingana nokudinga kweprojekthi

Izinto ezintathu ezibalulekileyo ziqonda ukukhetha ubungakanani:

• Ubude obugcweleyo : Landelanisa ubude obuphindekileyo nobude phakathi kweziphawuli zobulungisa (yongeza ama-100–150mm ukuba nendlela yokulungisa)
• Imyengelelo yeMdloti : Imimodeli eyisisekelo (1.8–3m) ihlawula kwi-20–35kN; izinhlelo eziphakeme (3–4.3m) zihlawula kwi-12–20kN
• Izimo Zendawo : Khetha izipropu ze-steel ezibovuzekayo emakhelweni apholile kakhulu futhi iziversion eziphathelene nezinye kakhulu kumakhelwane apholile

Ukufakela okufanele kwezindleko ngokuphathelene nokuphakama nokudebe

Isidebe se-tube siphatha indima ekhethekile kumthamo wokulahla—isi-48mm se-outer tube siqinisa amandla angaphezu kuka-35% kunomdeli we-42mm kuqhakaziso efanayo. Ukufika kisikhathi esilungileyo:

• Sebenzisa izipropu ze-1.8–2.4m nesidebe se-48mm ukulwa kwebhola lebetone (>25kN/m²)
• Sebenzisa izipropu ze-3–4m nesidebe se-42mm ukuthutha kwemvumbuka yezincitha (<15kN/m²)
• Hlola njalo itafula yamanje yomphathi, ngoba umthamo uphazamisa kwi-8–12% ngasinye isihlwa se-0.5m ekugcineni kweqhakaziso

Lolu hlelo lunciphisa ukuthi uhlobo olulodwa lwepropu lithuthane nezidingo ezahlukene kusukela emshwaleni ophakeme kakhulu kubetone ukuya kuhlola kwebhedla yezinduku emsakathini wokuhlela.

Umthamo Wokulahla Nokusebenza Kwesithunzi Sezintonga Ze-Acrow

Ukuzinza Inhla Yomlando We-Acrow: Idatha Ebalulekile Kusuka Kwi-Tabeli Zokuloda

Izinhla zomlando zisebenzisa izinhla zokuloda eziqinisekisiwe ukuze kugunyaziwe amandla okusebenza ngendlela ethembekile. Isibonelo, inhla yamaphesenti ama-2 ihlaya kuya kuma-20 kN ngaphansi kwe-standards ye-BS 4074, nokho amandla aphephelwa ngama-30% emaphesentini ama-3 ngokungahle kwezinkinga zokugayaya. Lezi tabeli zihlinzela izinguquko ezibalulekile:

Ubude Behlangothi	Amandla Okuloda Okakhulu (kN)	Ifakthara Yethemba
1.5m	25	3:1
2.0m	20	2.5:1
3.0m	14	2:1

Qaphela ukuthi uhlinzeke nezimvo zokudala ezigcinwe ngendawo kabefore ukubeka.

Izinto Ezifaka Isiphumo Kumsindle Wokuloda: Ubude, Umbono, Ukukhokelela

Isimo sikhiwe yizinto ezintathu eziphambene:

• Ubude : Amadoda aphazanyiswa ngokuxhasa ngebude—ngaproximately 8% ngasinye isikhathi esifushane se-0.5m ngaphandle kwe-1.5m
• Impahla : Izinhla zomlando we-Grade 43 zihlaya amandla angcono ngama-15% kunazo ezifanayo zakaliminiyamu
• Ukugcinwa : Ukubamba okungqamile kuhlela ubunzima ngama-40% emakheleni angaphezu kwe-2.5m

Ukuzivikela ukubalwa kabanzi: Imisebenzi yasebhakheni ngendlela iyaphatha nguye vs. Inani elibekwe

Ize zomphakathi zibonisa ukuthambeka kwe-23% phakathi kweenhloso ezivaviniweyo kwi-labhu nasebhakheni (Ibhali Eziphathekayo Yezulu 2023). Iziphumo ezifana nokuba isiphefumlo sibe sinikezelo esingahleli (kukhupha amandla ngo-18–35%), ukuxhasa ngokuphambene ngenxa yokucala kwebhethone, nokuchithwa kwemifula eziphathelene neentsika.

Ukukhetha i-Acrow Props ngeBuko obulungileyo kanye neenguqulelo zokwenza amandla ezivumelekileyo

Thembani izinto ezivumelekile nguqobo lobudlelane ezinezincazo ze-EN 1065 noma BS 4074. Kumaformwork amakhulu (>15 kN/m²), sebenzisa izimpendulo ze-20kN ezigcwele ngama-±1.8m noma izimpandela ezilandelanayo ezinobumba obugcwele kumakhela angaphezu kwe-4m. Qaphela zonke izikhathi ukuthi iinguqulelo zokwenza amandla ziyalingana nezibhalwe nguNgxoxi weshishini, engenakwenzela umfanekiso ojikeleze wokwakhiwa.

Imisebenzi Ehlakaniphileyo Yobumnandi kanye nokuvikela ingqalelo xa usebenzisa i-Acrow Props

Ukuhlola i-Acrow Props ukuthatha iqiniso ngaphambi kokusetshenziswa ngalinye

Ukukhazimba okujulile kuvikela izinkinga ezivame ukuthi zibangela izinto eziphatha (Occupational Safety Journal 2023). Khambalaza:

• Amaphethini noma amakhiqizi apholile emathuba atholakala kwezithuthi
• Ukuciphisa okuphakeme kunesilinganiso se-10% sesandla
• Amaphini ephepha enezimali nezinkomba zokulungisa
• Amaphawu okugcina akhiwe ngempilo emaqoshini wobuchwepheshe

Ukulungiselela Amasandla Ebamba Umdlalo Ukuvikela Ukuguqulwa Noma Ukungena

Hlukanisa ubunzima ngokusebenzisa i-base plates ezinzulu zezithuthi ezingcolile. Kusolwandle:

1. Sula izinto ezilahlekile kumakhampusi abuchwepheshe
2. Sebenzisa iziqwebhe zokulungisa kusolwandle okungafani ±5°
3. Faka iziphashephasi zebamba kumahlaza amahlabela

Lokhu kuvikelwa izinkinga yokufaka ngaphansi ngenkathi engu-40% ikusasa kususela ekufakeni ngqo (Ukwazi Kwemithombo Yekhono 2022).

Uqinisekisa Ukulayisha Okwenzakalelayo Kunye Nokuthembeka Kwegumbi Ngapha Kwesimo

Misinise ukulayishwa okwesibini kwi-3° yesitingi esiphambile ngexesha lokufakelwa. Jinani lezi zinto ezilandelayo ezibandakanya nokuthembeka:

• Ukuxhasana kwegumba: ≥90% ukuxhasana kwezandla
• Ubunzima bokuxhasana: ubungakanani bu-0.5mm
• Ubude besimo: ±28 imini yisikhathi esigcweleyo

Ukuletha isiphetho esingumngcipheko: Izilinganiso eziningi ezingaphezu kokulinganiselwa

Izinkinga ezintathu zika-Acrow zihlela izilinganiso phakathi kwe-20kN ne-50kN, kodwa izilinganiso zomsebenzi zonke zibonisa ukuthi ngaphandle kuka-12 iphesenti ehlukileyo zizohlula phansi kwezidingo zazo. Kungani lokhu kuhluleka? Kulokhu kukhona iminyaka engaphezu kweminyaka. Okokuqala, amakhemikhali aphelele kangako ambalwa avela kuze kube khona ekugcineni kwezinto ezifinyelela. Emva koko kukhona inkinga yezimali ezingalindelekile xa kususwa isandla, into abaningi abasebenzi basekhanda ngcono. Futhi masingenze ukuthini uMama Ntfo - utshintsho kwegunya nokuhlukunyuswa kwezililo kungahlukanisa ubuchwepheshe bwezinto kusukela kuya kuma-9 kuya kuma-15 iphesenti ngexesha. Ngokwesiqiniseko esishicilelwe ngozwelonyaka ngabasebenzi basezimali, kufanele kube khona kuphela okuqukethwe ngu-70 iphesenti yezidingo zazo xa kusebenziswa emaphrojekthi apholile apho ubuhlobo bukhulu.

Imibuzo Evame Ukubuzwa

Izinkinga ze-Acrow zisetshenziswa njani?

Izinkinga ze-Acrow ziyizixhumanisi ze-steel ezingavamiselwa zisetshenziswa ekujikijweni ukuphatha kwezimali zomntwana njengoba kusebenza noma ukulungisa izinxenye zezimali.

Ungalungise njani ubude obufaneleka be-Acrow prop?

Ubude obufaneleka be-Acrow prop bulungiswa ngokulula kwebanga, izidingo zolawulo, nezimo ezikhiyanini. Sicela uvuse izinhlu zomphathi wezimali ukuthola ubude obucophele.

Kungani Acrow props kumele kube khona ukuze kube nesiphazamiso esihle?

Qinisekisa ukuthi amabhaseplethi achaphazela okungenani 3x ubude be-prop, sebenzisa amawhasi okulungisa emakhondlo angahambelani, kanye nokugcina isivinini sesivinini ngaphakathi kwesikhathi sokufaka.

Kuzikuphi izizathu eziphathelene nokuhlukana kwe-Acrow prop?

Izizathu ezifanayo kuzo kukhona ukudluliswa kwezinto ezahlukene nezinkinga, amandla angalindelekile ekususweni kwemvumo, nezimo zendalo njenge-corrosion kanye neguquko lempilo ethintana nesithunzi sesteel.