延安市體育場大直徑嵌巖灌注樁設(shè)計
田敏
- 摘 要
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（中國建筑西北設(shè)計研究院，西安710003）［提要］ 延安市體育場采用人工挖孔大直徑嵌巖灌注樁，從樁基受力機(jī)理方面分析了采用嵌巖樁的優(yōu)越性。與擴(kuò)底灌注樁相比，嵌巖樁充分發(fā)揮了嵌巖段的側(cè)壁摩阻力和樁端阻力，節(jié)省了樁端擴(kuò)底需開鑿粗砂巖的工作量，避免了因擴(kuò)底而喪失斜面高度范圍內(nèi)的側(cè)阻力。嵌巖樁能大幅提高單樁豎向承載力，減少柱下布樁的數(shù)量和承臺尺寸。單樁豎向抗壓靜載荷試驗檢驗了設(shè)計方法的正確性。介紹了該樁的設(shè)計參數(shù)及靜載荷試驗結(jié)果，可供同類工程設(shè)計時參考。［關(guān)鍵詞］嵌巖灌注樁；擴(kuò)底灌注樁；試樁；錨；靜載荷試驗Design of Large-diameter Anchor Compresol Pile Foundation in Yan"an Stadium/Tian Min（China Northwest Building Design Research Institute, Xi"an 710003，China）Abstract:The large-diameter anchor compresol pile is used in the project of Yan"an stadium. The advantage of using anchor pile from mechanics mechanism is analyzed. The anchor compresol pile can exert the lateral resistance and end resistance of anchor segment fully, reduce the working capacity of cutting grotty rock comparing with pedestal compresol pile and avoid losing lateral resistance because of club-footed within the inclined planed height. Anchor compresol pile can raise the single pile vertical load-bearing capacity largely. The test shows that the pile design is correct through sign pile vertical compressive resistance static test. The design parameter of these piles and results of static test are introduced. It should be a design consultation to the same kind of engineering.Keywords:anchor compresol pile； pedestal compresol pile； pile test； anchor pile； static test
