Dab tsi yog cov khoom seem?

Slump yog qhov taw qhia tseem ceeb ntawm qhob wangability. Nws txiav txim siab los ntawm ntsuas qhov qhov siab qhov qhov qhov siab tom qab cov qhob ntws hauv nws tus kheej qhov hnyav. Ib qho kev poob qis dua qhia tau zoo dua cov hluav taws xob dav dav thiab ua haujlwm zoo dua rau kev tsim kho. Cov khau khiab feem ntau ntsuas siv lub khob hliav qab, tamped ua kom pom qhov qhov siab txawv ntawm qhov chaw siab tshaj plaws ntawm cov pob zeb siab tshaj plaws. Txwv tsis pub ua rau txo qis tsis yog cov ntoo thiab dej ua haujlwm tab sis kuj cuam tshuam txog kev ua haujlwm thiab kev ua tau zoo ntawm kev hnav khaub ncaws thiab nruj.

Daim ntawv qhia txog kev tawm tsam me me yuav tsum muaj rau cov pob zeb sib txawv raws cov qhob zog ua kom tiav. Cov no muaj raws li hauv qab no:

• Rau cov pob zeb ua kom muaj zog ua kom qis dua C50, yuav tsum tsawg dua 180mm.
• Rau cov pob zeb ua nrog lub zog loj dua C50, cov swb yuav tsum muaj ntau dua 180mm.

Pub nkag rau kev sib txawv rau kev poob qis kuj sib txawv raws li qhov qis dua tus nqi:

• Rau slump tsawg dua 40mm, tus muaj kev pub dawb yog ± 10mm.
• Rau slump ntawm 50mm thiab 90 hli, cov kev sib txawv yog ± 20mm.
• Rau kev poob qis tshaj 100 hli, kev sib txawv yog ± 30mm.

Rau ntau hom pob zeb ua, xws li tso cov pob zeb ua lossis hauv qab cov pob zeb hauv av, cov khoom poob qis kuj sib txawv. Piv txwv li, cov swb rau twj pob zeb ua kom muaj ntau dua los ntawm 100mm, thaum lub pob zeb poob qis ntawm 180mm thiab 220mm.

Yog li no, qhov kev poob qis tshwj xeeb yuav tsum raug txiav txim siab raws li cov pob zeb ua kom tiav, txoj kev ua haujlwm, thiab cov phiaj xwm tshwj xeeb.

Cov Qauv Tseeb rau Kev Ua Vaj Tse

Raws li cov qauv tshiab tshiab, cov kev poob qis yog raws li hauv qab no:

• Rau cov pob zeb ua kom muaj zog ua kom qis dua C50, yuav tsum tsawg dua 180mm.
• Rau cov pob zeb ua nrog lub zog loj dua C50, cov swb yuav tsum muaj ntau dua 180mm.

Cov hau kev rau kev ntsuas cov pob zeb uas muaj cov txheej txheem cinee thiab stanford funnel groundnel.

Cov dej ntws tawm rau cov tub pob zeb txawv yog:

• T1 Cov Khaub Ncaws Kub Quav (C1): 10 ~ 40 hli
• T2 Yas Pob Zeb Ua (C2): 50 ~ 90mm
• T3 Flowable Qhob (C3): 100 ~ 150 hli
• T4 High Flowability Qhob (C4): Ntau dua los yog sib npaug rau 160 hli

Qhov loj me me yuav tsum ua raws li cov txheej txheem kev tsim kho. Piv txwv li, cov swb rau cov txheej txheem hauv paus lossis tiv thaiv cov khaubncaws sab nraud lossis cov khaubncaws sab nraud povtseg yuav tsum tau nruab nrab ntawm 140mm thiab cov kab teeb thiab kab ntawv, nws yuav tsum yog ntawm 160 hli thiab 180mm.

Lub swb rau npaj-sib qhob qheb feem ntau yog li 100mm rau 200mmm los xyuas kom muaj kev thauj khoom zoo thiab nqus tau.

Cov khoom lag luam tshwj xeeb yuav tsum nyob rau hauv cov kev tsim kho

Qhov tshwj xeeb poob raws li kev tsim kho sib txawv yog raws li hauv qab no:

1. Tso tawm ntawm qhov siab tso tawm ntawm cov pob zeb:

• Rau kev tso cov twj tso tawm qis dua 30 metres, cov swb yuav tsum yog nruab nrab ntawm 100mm thiab 140mm.
• Rau kev tso tawm ntawm 30 metres thiab 60 metres, cov swb yuav tsum yog nruab nrab ntawm 140mm thiab 160mm.
• Rau tso twj siab ntawm 60 metres thiab 100 meters, cov swb yuav tsum yog nruab nrab ntawm 160mm thiab 180mm.
• Kev tso tawm ntawm qhov siab ntau dua 100 metres, cov swb yuav tsum yog nruab nrab ntawm 180mm thiab 220mm.

2. Tso tawm ntawm cov tsev ua haujlwm ruaj khov rau ntawm cov pob zeb:

• Rau cov pob zeb ua kom muaj zog ua kom qis dua C50, yuav tsum tau tswj cov pob zeb tsis pub dhau 180mm.
• Rau cov pob zeb ua nrog lub zog ua haujlwm siab dua C50, yuav tsum muaj ntau dua 180 hli.

3.ffect ntawm kub thiab av noo:

• Nyob rau hauv kev siv kub-kev tsim cua, cov swb yuav tsum tsis pub tsawg tshaj 70 hli. Rau feem ntau lub vev xaib siv, nws yog feem ntau 100 koob, thiab muaj kev mob siab rau 160 hli.
• Nyob rau hauv lub caij ntuj no siv, cov swb yuav tsum nyob nruab nrab ntawm 160 ± 20mm.