Dulmar guud oo ku saabsan baararka birta bannaan ee barroosinka
Biraha birta bannaan ee barroosinka waxaa loo soo saaray qaybo leh dhererka caadiga ah ee 2.0, 3.0 ama 4.0 m. Dhexroorka caadiga ah ee birta bannaan waxay u dhaxaysaa 30.0 mm ilaa 127.0 mm. Haddii loo baahdo, birta bannaan ee birta ah ayaa lagu sii wadaa iyada oo la raacayo nuts. Noocyada kala duwan ee qashin-qubka laydhka ayaa la isticmaalaa iyadoo ku xidhan nooca ciidda ama cufka dhagaxa. Birta godan waxa ay ka fiican tahay birta adag ee leh aag isku mid ah, sababtoo ah hab-dhismeedkeeda qaabdhismeed ee ka wanaagsan marka la eego laabta, wareega iyo qalooca qalooca. Natiijadu waa xajin sare iyo xasillooni dabacsanaan oo isku mid ah birta.
Tilmaamaha Ulaha Barroosinka Is-Doodida
| Tilmaamid | R25N | R32L | R32N | R32/18.5 | R32S | R32SS | R38N | R38/19 | R51L | R51N | T76N | T76S |
| Dhexroor ka baxsan (mm) | 25 | 32 | 32 | 32 | 32 | 32 | 38 | 38 | 51 | 51 | 76 | 76 |
| Dhexroorka gudaha, celceliska(mm) | 14 | 22 | 21 | 18.5 | 17 | 15.5 | 21 | 19 | 36 | 33 | 52 | 45 |
| Dhexroorka dibadda, wax ku ool ah (mm) | 22.5 | 29.1 | 29.1 | 29.1 | 29.1 | 29.1 | 35.7 | 35.7 | 47.8 | 47.8 | 71 | 71 |
| Awoodda culeyska ugu dambeeya (kN) | 200 | 260 | 280 | 280 | 360 | 405 | 500 | 500 | 550 | 800 | 1600 | 1900kii |
| Awoodda wax-soo-saarka (kN) | 150 | 200 | 230 | 230 | 280 | 350 | 400 | 400 | 450 | 630 | 1200 | 1500 |
| Xoog xajin, Rm (N/mm2) | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 |
| Xoogga wax-soo-saarka, Rp0, 2(N/mm2) | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 |
| Miisaanka (kg/m) | 2.3 | 2.8 | 2.9 | 3.4 | 3.4 | 3.6 | 4.8 | 5.5 | 6.0 | 7.6 | 16.5 | 19.0 |
| Nooca dunta (gacanta bidix) | ISO 10208 | ISO 1720 | Mai T76 heerka | |||||||||
| Heerka birta | EN 10083-1 | |||||||||||
Codsiyada Ulaha Barroosinka Is-Doodidda
Sanadihii la soo dhaafay, iyadoo baahida sii kordheysa ee taageerada juqraafiyeedka, qalabka qodista ayaa si joogto ah loo cusbooneysiiyay oo loo horumariyay. Isla mar ahaantaana, kharashka shaqada iyo kiraynta ayaa kor u kacay, iyo shuruudaha muddada dhismuhu waxay noqdeen kuwo aad u sarreeya. Intaa waxaa dheer, isticmaalka is-qodidda ulo barroosinnada godan xaaladaha juqraafiyeed ee u nugul inay burburaan waxay leedahay saameyn ku qotonta heer sare ah. Sababahaas ayaa horseeday in si isa soo taraysa loo adeegsado is- qodida ulaha barroosinka ee godan. Ulaha barroosinka ee godan ee is-qodi kara ayaa inta badan loo adeegsadaa xaaladaha soo socda:
1. Loo isticmaalo sidii usha barroosinka ee prestressed: loo isticmaalo xaaladaha sida jiirada, qodista dhulka hoostiisa, iyo lid sabaynta si loogu beddelo fiilooyinka barroosinka. Ulaha barroosinka ah ee godan ayaa la qodayaa si qoto dheer oo loo baahan yahay, ka dibna grouting dhamaadka ayaa la sameeyaa. Ka dib markii la adkeeyo, xiisad ayaa lagu dabaqaa;
2. Waxaa loo isticmaalaa sida micropiles: Ulaha barroosinka godlan ee is- qodida waa la daadin karaa oo hoos loo gooyn karaa si ay u sameeyaan micropiles, oo caadi ahaan loo isticmaalo aasaaska munaaradda warshadda tamarta dabaysha, aasaaska munaaradda gudbinta, aasaaska dhisidda, ilaalinta aasaaska tuulan derbiga, aasaaska tuulan buundada, iwm;
3. Loo isticmaalo ciddiyaha ciidda: caadi ahaan loo isticmaalo taageerada jiirada, beddelidda ulaha bar birta ah ee caadiga ah, iyo sidoo kale waxaa loo isticmaali karaa taageerada jiirada jaranjarada ee gunta hoose;
4. Loo isticmaalo ciddiyaha dhagaxa: Jiirarka dhagaxyada ama tunnelyada leh cimilo aad u daran ama horumarka wadajirka ah, ulaha barroosinka ah ee godan ayaa iskood wax u qodaya oo loo isticmaali karaa in lagu xidho dhagxaanta dhagxaanta si loo hagaajiyo xasiloonidooda. Tusaale ahaan, jiirarka dhagxaanta ee waddooyinka waaweyn iyo tareenada ee u nugul inay burburaan waa la xoojin karaa, tuubooyinka tuubooyinka caadiga ah ayaa sidoo kale lagu beddeli karaa xoojinta meelaha bannaan ee tunnel-ka;
5. Xoojinta aasaasiga ah ama maareynta musiibada. Maaddaama wakhtiga taageerada ee nidaamka taageerada asalka ah ee geotechnical uu kordho, qaababkan taageerada ayaa laga yaabaa inay la kulmaan qaar ka mid ah dhibaatooyinka u baahan xoojinta ama daaweynta, sida qallafsanaanta jiirada asalka ah, dejinta aasaaska asalka ah, iyo kor u qaadista dusha waddada. Ulaha barroosinka ah ee godan ayaa loo istcimaali karaa in lagu dalooliyo jiirada asalka ah, aasaaska, ama dhulka dariiqa, iwm.
