Optimal Design and Experimental Research of Photovoltaic Support Micro Anti Pull-out Foundation in Northwest China(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2019年01期
- Page:
- 120-126
- Research Field:
- Publishing date:
Info
- Title:
- Optimal Design and Experimental Research of Photovoltaic Support Micro Anti Pull-out Foundation in Northwest China
- Author(s):
- ZHANG Guang-ping; HUANG Xue-feng; ZHANG Pei-ran; LI Yu-run; XI Zenghong
- China Energy Engineering Group Gansu Electric Power Design Institute Co., Ltd
- Keywords:
- pile foundation engineering; anti pull-out optimization design; field test; micro anchor composite pile; displacement; bearing capacity
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to solve the design and application of photovoltaic support foundation in northwest China, the composite pile with micro anchor composite pile was put forward on the basis of traditional anti pullout foundation. The field fullscale test of sand gravel site was carried out in a photovoltaic power station in northwest China, the displacement and axial force changes of the test piles during the loading process were monitored dynamically at full time by the vertical displacement observation device and the stress gauges embedded in different depths. The bearing capacity and engineering application of the traditional anti pullout foundation and micro anchor composite piles were compared and analyzed. The results show that the loaddisplacement curves of the traditional anti pullout foundation vary with the pile type, and the curves of micro anchor composite pile exhibit slow change type. The ultimate bearing capacity of the traditional anti pullout foundation is generally lower than 15 kN, while that of the micro anchor composite pile is generally higher than 60 kN. The bearing capacity of micro anchor composite pile increases greatly, but it has critical length (4 m) with the increase of pile length. The optimal parameters of anti pullout bearing characteristic of micro anchor composite pile reflect excellent working performance with similar pile size in three aspects quantitatively, including the bearing capacity, displacement and composite optimal effect. It is suggested that the micro anchor composite pile can be applied as the pullout foundation of the photovoltaic support in the northwest sand gravel site, and the design of pile length can be controlled within 4 m.
Last Update: 2019-01-23