Legal Advisor
Our Legal Advisor on IP (Intellectual Property) Matters:Huasun Patent Attorneys & Attorneys-at-law
Tel: +49 (0) 89 3838 0170
Fax: +49 (0) 89 3838 0171
Email:sun@huasun.de
Website:www.huasun.de
Address: Friedrichstr. 33, 80801 Munich Germany
If there is any enquiry of IP legal issues, please feel free to contract us. Patent Clarification
Contact us
Tel: (86)757-87662928
Fax: (86)757-87662921
Email:china@pvpowerway.com
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Scope of application of different foundations
No. Soil type Description Ground anchor Screw pile Steel pillar Micro pile Concrete foundation 0 PT, OH - - - - - OK 1 MH, CH, OL, ML, CL Clay, silt OK OK OK OK OK 2 SC, SM, SP Clay, silt, poorly graded sands OK OK OK OK OK 3 SW, GC, GM, GP Well graded sands; clay, silt, poorly graded gravel OK OK OK OK OK 4 GW Well graded gravel OK OK possible OK OK 5 RMR＜20 Poorly graded rock mass possible - - possible OK 6 RMR21-60 Common graded rock mass preboring - - possible OK 7 RMR61-100 Well graded rock mass preboring - - possible OK Seven Types of Soil
Soil class Name Components Ground screw Drilling Ⅰ topsoil Sand, gravel, silt and clay mixture may contain humans and creatures OK Predrilled with spiral snake hole hammer drill Ⅱ Flowing soil Liquid to mushy ground water OK, but the soil has no strength Predrilled with spiral snake hole hammer drill Ⅲ Light and lose detachable soil non-bonded or weakly bonded sand, gravel or sand/gravel mixes OK, but has little resistance Predrilled with spiral snake hole hammer drill Ⅳ Mid-heavy lose soil sand, gravel, silt and clay of at least 15% grain size ＜0.06 mm, a maximum of 30% rock fragments and more than 63 mm diam. or 0.01 m3 volume Predrilled with spiral snake hole hammer drill Ⅴ difficult to solve soil types ground with more than 30% stone content> 63 mm diam. or 0.01m3 to 0.1 m3 volume very rigid tone, depending on water content soft or firm OK Predrilled with spiral snake hole hammer drill Ⅵ easy release and see rocky soil rocky, heavily jointed, brittle, crumbly, slate, soft or weathered and see consolidated, non-cohesive and cohesive soils OK, drill with hole hammer Predrilled with spiral snake hole hammer drill Ⅶ removable hard rock little rock with high structural strength jointed and weathered defined, weathered shale, slag heaps of iron and steel works OK, drill with hole hammer Predrilled with spiral snake hole hammer drill -
Our standard products are designed for compression loads up to four metric tons and tensile loads up to two metric tons. We can offer earth screws with higher bearing loads as well. Typically, you require one earth screw to support one KW.
Soil type Test load PW-GS: 76*800 PW-GS: 76*1600 PW-GS: 90*1200 PW-GS: 90*2000 PW-GS: 114*1400 PW-GS: 140*1400 Sand Pressure(kN/lbs) 15.9/3574 32.3/7261 34.3/7711 53.4/12005 39.8/8947 40.8/9172 Tensile(kN/lbs) 10.0/2248 19.9/4473 21.1/4743 30.7/6902 24.3/5463 17.5/3934 Lateral(kN/lbs) 4.0/899 4.5/1011 6.4/1438 7.3/1640 10.5/2360 11.0/2472 Gravel Pressure(kN/lbs) 14.1/3170 28.8/6474 30.5/6857 47.7/10723 35.5/7981 24.5/5508 Tensile(kN/lbs) 10.7/2405 21.0/4721 22.4/5036 31.0/6969 25.6/5755 18.9/4249 Lateral(kN/lbs) 4.6/1034 5.9/1326 7.7/1730 7.9/1775 9.2/2067 10.4/2337 Cohesive soil Pressure(kN/lbs) 10.6/2383 20.2/4541 21.6/4856 26.9/6047 24.4/5485 18.9/4249 Tensile(kN/lbs) 8.5/1911 16.0/3597 17.0/3822 19.7/4429 19.1/4294 15.3/3440 Lateral(kN/lbs) 5.1/1146 7.2/1618 8.4/1888 9.1/2045 11.8/2652 13.9/3124