1. Okwu Mmalite
W-Beam Guardrails bụ ihe ngwọta nchekwa okporo ụzọ a ma ama n'ụwa niile, a maara ya maka ịdị irè ha n'ibelata oke ihe mberede na mgbanwe ha n'ofe gburugburu ụzọ dị iche iche. A na-eji sistemụ ndị a eme ihe nke ukwuu n'ihi nguzozi arụmọrụ ha, arụmọrụ ọnụ ahịa ha, na mgbanwe ha. Akụkọ a na-enye nyocha miri emi nke W-Beam Guardrails, na-ekpuchi nkọwapụta teknụzụ, njirimara arụmọrụ, usoro nrụnye, na mmetụta akụ na ụba. Ebumnuche bụ inye ndị ọkachamara nghọta zuru oke nke uru, oke, na mmepe nke sistemụ W-Beam n'ọdịnihu.
2. Nkọwa nka na ụzụ na ụkpụrụ nhazi
2.1 W-Beam Profaịlụ
Akụkụ bụ isi nke W-Beam Guardrail bụ ụdị “W” ya pụrụ iche, nke na-enyere aka ikesa mmetụta mmetụta yana igbochi ụgbọ ala ịpụ n'okporo ụzọ.
- akụkụ: Standard elu nke 310 mm na omimi nke 80 mm.
- ihe onwunwe: Galvanized ígwè na elu anwụ ngwa ngwa.
- Nye Ike: 345-450 MPa.
- Ike Ghachiri Iyi: 483-620 MPa.
- ọkpụrụkpụ: Ọtụtụ 2.67 mm (nlele 12) ma ọ bụ 3.42 mm (nlele 10).
- Galvanization: Hot-mikpu galvanized na mkpuchi mkpuchi nke 610 g / m² (AASHTO M180) iji hụ na nguzogide corrosion ogologo oge.
2.2 Akụrụngwa sistemụ
- Posts: Emere site na osisi ma ọ bụ ígwè, na-akwado ụgbọ okporo ígwè ma na-ebufe mmetụta mmetụta na ala.
- Okwa osisi: 150 mm x 200 mm.
- Mpempe igwe: profaịlụ dị iche iche dị ka I-beam ma ọ bụ C-channel.
- Mgbochi: Nye nkwụsị dị mkpa n'etiti post na ụgbọ okporo ígwè, na-enyere aka ịnọgide na-adị elu ụgbọ okporo ígwè ma melite absorption ike.
- Ụgbọ okporo ígwè: Njikọ agbakwunyere na kpọchiri akpọchi na-eme ka ọrụ ụgbọ oloko na-aga n'ihu.
- Ọnụ njedebe: Ezubere ka ọ ghara imebi ụgbọ ala na-emetụta ma ọ bụ duru ha pụọ n'enweghị nsogbu.
- Oghere nzipu ozi: Na-abụkarị mita 1.905 (ụkwụ 6.25) maka nrụnye ọkọlọtọ.
2.3 Atụmatụ ihe
A na-ahọrọ ígwè a na-eji na usoro W-Beam maka ike dị elu na ịdịte aka ya. N'ebe ndị nwere ọnọdụ ihu igwe dị oke egwu, karịsịa na mpaghara ndị dị n'ụsọ oké osimiri nwere nnukwu nnu nnu, iji ihe mkpuchi galvanized dị elu na ihe ndị ọzọ na-eguzogide corrosion nwere ike ịgbatị ogologo ndụ nke usoro ahụ.
3. Arụmọrụ Analysis
3.1 Usoro absorption ike
Nhazi nke W-Beam Guardrail na-enyere ya aka ịmịnye na igbasa ike mmetụta nke ọma:
- Nrụrụ ọkụ: Ụdị W na-enye ohere ka ụgbọ okporo ígwè na-ehulata ma nweta ume na-enweghị imebi.
- Mbipụta akwụkwọ ozi: Emebere akwụkwọ ozi ka ọ gbajie ma ọ bụ gbadaa na mmetụta, na-ebelata ike ebufe na ụgbọ ala.
- Ụkwụ ụgbọ oloko: Sistemu na-emegharị ụgbọ ala site na ịnọgide na-enwe nchekasị n'akụkụ ogologo ụgbọ okporo ígwè.
- Mkpuchi mgbochi: Ọzọkwa dissipates mmetụta ike site mkpakọ na ịnọgide na-enwe ogologo ụgbọ okporo ígwè n'oge okuku.
Ọmụmụ Zhang et al. (2023) chọpụtara na W-Beam guardrail nwere ike ịgbasa ruo 55 kJ ike na nkukota ya na ọkọlọtọ ndị njem.
3.2 Ọrụ nchekwa
W-Beam Guardrails zutere ọtụtụ ụkpụrụ nchekwa mba ụwa:
- Asambodo MASH TL-3: Ezubere ka ọ nwee na redirect ụgbọ ala ruru 2,270 kg (5,000 lbs) na 100 km / h na 25-degree akụkụ nke mmetụta.
- Ọkwa njide EN1317 N2: Egosiri ịdị irè n'ime ụgbọ ala ndị njem ruru 1,500 n'arọ na 110 km / h na akụkụ mmetụta 20-ogo.
Data mkpọka nke ụwa n'ezie sitere na Federal Highway Administration (2023) na-egosi mbelata nke njọ mbelata site na 40-50% maka ụzọ okporo ụzọ nwere sistemụ W-Beam.
4. Nwụnye na Nlekọta
4.1 Usoro ntinye
Ntinye nke ọma dị oke mkpa maka ịrụ ọrụ nke nchekwa W-Beam:
- Nkwadebe saịtị: A na-edozi mpaghara ahụ na kọmpat iji hụ na nkwụsi ike.
- Nwụnye Post: Enwere ike ịkwanye akwụkwọ ozi n'ime ala (ogidi ígwè) ma ọ bụ tinye ya n'ime oghere augured (osisi osisi), jupụtara n'azụ ihe.
- Blockout na nrịgo ụgbọ oloko: Ntụnye ziri ezi na-eme ka nnabata ike kachasị mma n'oge mmetụta.
- Nwụnye nkwụsị njedebe: Ndị a dị oke mkpa maka mwepu ụgbọ ala ma ọ bụ ntugharị ya kwesịrị itinye ya dịka njirimara okporo ụzọ siri dị.
Dika ihe omumu ihe omumu nke National Cooperative Highway Research Programme, ndi oru ugbo nwere ike iwunye n'etiti 250 na 350 mita nke W-Beam guardrail kwa ubochi, dabere na onodu uzo.
4.2 chọrọ nlekọta
Sistemu W-Beam chọrọ nyocha oge, ọkachasị mgbe mmetụta gasịrị. Isi ihe nyocha gụnyere:
- Ndozi ụgbọ okporo ígwè: Ịhụ na okporo ụzọ nche na-anọgide n'ogo ziri ezi.
- Ọnọdụ nbipute: Ịtụle nkwụsi ike post na nkwado ala.
- Njikọ Njikọ: Ịkwado na splics ụgbọ okporo ígwè ka dị nchebe.
- Galvanization: Na-enyocha ihe ịrịba ama ọ bụla nke corrosion, karịsịa na mpaghara osimiri.
Nnyocha usoro ndụ nke Texas Department of Transportation (2023) chọpụtara na nrụzi mgbe niile, dị ka dochie ọwa ozi mebiri emebi na ụgbọ okporo ígwè na-emegharịghachi, nwere ike ịgbatị ndụ nke nchekwa ihe ruru afọ 25.
5. Nyocha atụ
| atụmatụ | W-Beam Guardrail | Ihe mgbochi concrete | Ihe mgbochi USB |
|---|---|---|---|
| Ego mbu | $$ | $$$$ | $ |
| Mmezi Efu | $$ | $ | $$$ |
| Ntinye ike | ọkara | Low | High |
| Oge Nwụnye | ọkara | High | Low |
| Kwesịrị ekwesị maka Curves | High | Limited | magburu onwe |
| Mmebi ụgbọ ala (Ọsọ dị ala) | agafeghị oke | High | Low |
Tebụlụ ntụnyere a na-akọwapụta azụmaahịa dị n'etiti usoro nchekwa dị n'akụkụ ụzọ dị iche iche, dabere na ọnụ ahịa, nnabata ike, na mmetụta ụgbọ ala siri dị.
6. Nyocha gbasara akụ na ụba
6.1 Ntụle ọnụ ahịa okirikiri ndụ
W-Beam Guardrails na-eri ọnụ na usoro ndụ ha:
- Echichi mbụ: Ọnụ ala dị ala ma e jiri ya tụnyere ihe mgbochi kọmpụta, yana ọnụ ahịa dị oke ọnụ maka mmezi na-aga n'ihu.
- Ego mmezi: Ọ bụ ezie na nrụzi dị mkpa mgbe mmetụta gasịrị, imewe modular na-eme ka ọnụ ahịa na-akwụ ụgwọ.
- Nnọchi Mgbanwe: A na-adịru afọ 20-25, yana usoro ụfọdụ na-adị ogologo oge na mpaghara mmetụta dị ala.
Nnyocha 2023 nke Ngalaba Ụgbọ njem Texas chọtara ọnụ ahịa uru nke 5: 1 maka nrụnye nchekwa W-Beam n'ime afọ 25, na-eme ka ọ bụrụ otu n'ime nhọrọ kachasị ọnụ maka nchekwa okporo ụzọ.
6.2 Mmetụta ọha
- Mbelata na ọnwụ: Usoro W-Beam na-ebelata ọnwụ site na 30% maka mkpọka okporo ụzọ na-agba ọsọ, na-eme ka ha bụrụ nnukwu ihe na-enye aka na nchekwa ọha.
- Mbelata na mmerụ ahụ dị njọ: Mbelata 25% nke mmerụ ahụ dị njọ na-asụgharị n'ime ego nchekwa obodo nke ihe dịka $ 450,000 kwa mile karịa afọ 25.
7. Oke na echiche
- Mmetụta akụkụ dị elu: W-Beam Guardrails nwere ike ọ gaghị arụ ọrụ nke ọma na mmetụta dị elu, yana usoro ndị ọzọ dị ka ihe mgbochi ihe nwere ike ịchọ na mpaghara ndị a.
- Ngwongwo dị arọ: Ọ bụ ezie na ọ dị irè maka ọtụtụ ụgbọ ala ndị njem, usoro W-Beam nwere oke arụmọrụ megide nnukwu gwongworo ma ọ bụ ụgbọ ala.
- N'okpuru ihe ize ndụ: Ụgbọ ala ndị dị nta nwere ike ịnwe ihe ize ndụ dị elu nke ịdaba na ọnọdụ mmetụta kpọmkwem, karịsịa ma ọ bụrụ na akwadoghị elu ụgbọ okporo ígwè nke ọma.
- Ndozi ugboro ugboro: N'ebe ndị nwere nnukwu ihe ize ndụ, dị ka ndị na-enwekarị ihe mberede, nrụzi mgbe niile nwere ike ịbawanye ụgwọ ọrụ nlekọta.
8. Mmepe n'ọdịnihu na ntụziaka nyocha
8.1 Ihe ohuru ohuru
Ọganihu na sayensị akụrụngwa na-ebute ihe ọhụrụ na ụzọ nchekwa W-Beam:
- Igwe arụ ọrụ dị elu: A na-emepụta ígwè ndị na-esote ọgbọ, gụnyere ihe ndị a na-ahazi nano, iji meziwanye oke ike na ịdị arọ.
- Akụrụngwa ndị mejupụtaraPolymers na-eme ka eriri (FRP) dị ike nwere ike ibelata ibu ka ọ na-eme ka nguzogide corrosion na-eguzogide n'ụsọ oké osimiri ma ọ bụ gburugburu ebe na-emebi emebi. MIT's Department of Civil Engineering na-atụ aro na ihe ndị a nwere ike ịkwalite nnabata ume site na 30%.
8.2 Teknụzụ Smart
Ọdịnihu nke sistemụ W-Beam dabere na ijikọ teknụzụ smart:
- Ihe mmetụta agbakwunyere: Nchọpụta mmetụta na ihe nleba anya ahụike nhazi nwere ike ịnye data ozugbo na iguzosi ike n'ezi ihe nke sistemu ma mee ka oge nzaghachi nrụzi ngwa ngwa.
- Igwe ọkụ na okporo ụzọ ntụgharị: Emelitere visibiliti n'abalị ma ọ bụ n'oge ọnọdụ ihu igwe ọjọọ.
- Njikọ ụgbọ ala ejikọrọSistemụ ga-eme n'ọdịnihu nwere ike iji ụgbọ ala ejikọrọ na-emekọrịta ihe, na-enye ọkwa ihe egwu ozugbo yana ọkwa mberede.
9. Echiche ndị ọkachamara
Dr. John Smith, onye ọkachamara na-ahụ maka nchekwa okporo ụzọ na Mahadum Stanford, na-ekwu, sị: “W-Beam nche na-anọgide na-abụ akụkụ dị mkpa nke akụrụngwa nchekwa n'akụkụ okporo ụzọ. Nkwagharị ha, jikọtara ya na ọganihu ga-eme n'ọdịnihu na ihe ndị mara mma na teknụzụ nlekota oru, na-eme ka ha nọgide na-adị mkpa na usoro nchekwa okporo ụzọ ".
Jane Doe, onye isi injinia na International Road Federation, na-ekwu, sị: “Ọ bụ ezie na a na-emepụta usoro nchekwa ọhụrụ, ndekọ egwu W-Beam na ime mgbanwe na-eme ka ọ bụrụ nhọrọ a pụrụ ịdabere na ya maka ọnọdụ okporo ụzọ dị iche iche. Ijikọ teknụzụ ọgbara ọhụrụ ga-eme ka arụmọrụ ya na ogologo ndụ ya dịkwuo elu.
10. Mmechi
Sistemụ nchekwa W-Beam bụ isi nkuku nke nchekwa okporo ụzọ, na-enye arụmọrụ egosipụtara, arụmọrụ ọnụ ahịa, yana ngbanwe. Ọ bụ ezie na ha nwere oke ụfọdụ, karịsịa na ọnọdụ mmetụta dị elu, nchọpụta na-aga n'ihu n'ime ihe onwunwe na ntinye aka na nkà na ụzụ ga-eme ka ọ dị mma na ogologo ndụ ha. Maka ndị isi okporo ụzọ na ndị injinia, usoro W-Beam ka bụ nhọrọ siri ike, na-edozi ụgwọ nrụnye mbụ yana arụmọrụ ogologo oge yana uru nchekwa ọha.
