Barcha asoslarni beton zanjirli keramik (RCC)dan qilish kerak. RCC qurilmalarining dizayni va qurilishi IS:456 bo'yicha amalga oshiriladi va betonning minimal darajasi M-20 bo'lishi kerak.
Dizayn usuli chegaraviy holat metodi bo'lib, uni qo'llash kerak.
IS:1786 yoki TMT barlariga mos keladigan sovuq tortilgan deformatsiya barlari armatura sifatida ishlatilishi kerak.
Asoslarni metall konstruktsiyalar, jihozlar yoki yuklash uchun kritik yuk kombinatsiyasiga qarab ishlab chiqish kerak.
Agar talab qilinsa, asosga himoya berilishi kerak, shuningdek, aggressiv alkali to'qim, qora paxta to'qim yoki beton asoslarga zarar yetkazadigan boshqa to'qimlar uchun maxsus talablarni qondirish kerak.
Barcha qurilmalar, qurilish va ishlash shartlari uchun aralash yuk kombinatsiyalari bo'yicha suvda suvga solinish va qaytarib qo'yilish stabilizatsiyasini tekshirish kerak.
Qaytarib qo'yilishka qarshi tekshirishda, asosning tepasidagi to'qimning vertikal yuklanishi hisobga olinishi kerak va asosning tepasidagi to'qimning piramidal formasini hisobga olib bo'lmaydi.
Pastki markaziy joylashuvdagi asos ham eng yuqori suv standarti uchun ishlab chiqilishi kerak. Bouncy uchun kamida 1.5 xavfsizlik faktori ta'minlanishi kerak.
Ustun va jihoz asoslari, normal shartlarda 2.2 va qisqa muntazam shartlarda 1.65 xavfsizlik faktorini hisobga olgan holda, suvga solinish, qaytarib qo'yilish va chiqarishka qarshi tekshirilishi kerak.
Elektrik ustunlari turli joylarda joylashtirilishi mumkin. Energetika tarmog'i dunyo bo'lgan barcha joylarda tarqalmoqda. Turli joylardagi to'qim sharoiti ham farqli. To'qimning turi qandayligiga qarab, elektrik ustunlarning asoslari tanlanib, shunday qilib qurilishi kerak. Biz sizga turli to'qim sharoitlaridagi elektrik ustunlarning asoslarini sinflash uchun aniq va qisqa ko'rsatmalar berishga harakat qildik.
SL |
Name of soil encountered |
Type of foundation to be adopted |
1 |
In good soil (silty sand mixed with clay) |
Normal Dry |
2 |
Where top layer of Black Cotton soil extends upto 50% of the depth with good soil there after. |
Partial Black Cotton |
3 |
Where top layer of black cotton soil exceeds 50% and extends upto full depth or is followed by good soil. |
Black Cotton |
4 |
Where top layer is good soil upto 50% of the depth but the lower layer is a black cotton soil |
Black Cotton |
5 |
Where subsoil water is met at 1.5 ml or more below the ground level in good soil |
Wet |
6 |
Good soil locations which are in surface water for long period with water penetration not exceeding 1.0 m below ground level (e.g. paddy fields). |
Wet |
7 |
In good soil where subsoil water is encountered between 0.75m and 1.5m depth from ground level. |
Partially submerged |
8 |
In good soil where subsoil water is encountered within 0.75m depth from ground level |
Fully Submerged |
9 |
Where top layer of normal dry soil extends upto 85% of the depth followed by fissured rock without presence of water. |
Dry Fissured Rock |
10 |
Where top layer is lissured rock followed by good soil/sandy soil with/without presence of water |
Special foundation |
11 |
Where normal soil/tissured rock extends upto 85% of the depth followed by hard rock |
Dry fissured Rock with under cut in Fisured Rock combined with anchor bar for hard rock design |
12 |
Where fissure rock os encountered with subsoil water within 0.75m or below 0.75m from G.L. (Top layer may be either a good soil or black cotton soil) |
Submerged Fissured Rock |
13 |
Where Hard Rock is encountered at 1.5 m or less below ground level. |
Hard Rock |
14 |
Where Hard Rock is encountered from 1.5 m to 2.5m below G.L. (Top layer being good soil) |
with chimney for Normal Soil Hard Rock Foundation |
15 |
Where hard rock is encountered from 1.5m to 2.5 m below G./L. (Top layer either in Black cotton) soil or fissured Rock |
Hard Rock Foundation design with chimneys designed for wet black cotton soil. |
16 |
Where fissured rock is encountered at the bottom of pit (with black cotton soil at top) |
Composite Foundation |
17 |
Where hard rock is encountered at bottom with water and black cotton soil at top and hard rock layer depth is less than 1.5 m. |
Hard Rock |
18 |
Sandy soil with clay content not exceeding 10% |
Dry Sandy soil foudation |
19 |
Sandy soil with water table in the pits |
Wet sandy soil design to be developed considering the depth of water |
20 |
Where top layer upto 1.5 m below G.L. is normal dry soil and thereafter hard soil/murrum |
Normal dry with undercut |
21 |
Where bottom layer is marshy soil with top layer of good soil/fissured rock/black cotton |
Soil investigation is to be carried out and special foundation design to be developed. |
22 |
Where the top layers are a combination of clinker mixed with firm soil, gravel and stone chips upto 60% of foundation deapth from ground level followed by hard murrum |
Normal dry with undercut |
23 |
Where top layers are combination of hard murrum, soft rock etc. followed by yellow/black clayee soil |
Special foundation design is to be developed after carrying out soil investigation. |
Yuqorida ko'rsatilmagan qolgan barcha qopqoq kombinatsiyalari uchun maxsus asos loyihasini ishlab chiqish talab qilinadi.
Eslatma: Orijinalni hursandlik bilan ulashishga qadrdor bo'ling, agar huquqlar buzilsa, iltimos, o'chirib tashlash uchun bog'laning.
