【摘要】：結(jié)合東非某工程12 mm壁厚鋼管樁沉樁實(shí)踐,總結(jié)薄壁鋼管樁在強(qiáng)風(fēng)化巖層的沉樁規(guī)律,得出以下結(jié)論:鋼管樁進(jìn)入標(biāo)貫擊數(shù)50擊的強(qiáng)風(fēng)化珊瑚石灰?guī)r面時,其貫入度為21.5~28.3 mm湓擊。樁尖位于強(qiáng)風(fēng)化巖層時液壓錘能量傳遞系數(shù)最大可達(dá)94.5%,薄壁鋼管樁進(jìn)入強(qiáng)風(fēng)化珊瑚石灰?guī)r持力層最深可達(dá)7.1 m,此時貫入度為1.5 mm湓擊�；鶚禗1和E1高應(yīng)變結(jié)果顯示,薄壁鋼管樁樁尖進(jìn)入強(qiáng)風(fēng)化巖層3.7 m時,端阻力值增加明顯趨緩,此時比剛?cè)霂r端阻力值增加30.8%~32.8%。
[Abstract]:Combined with the piling practice of 12 mm thick steel pipe pile in East Africa, the paper summarizes the piling rule of thin-walled steel pipe pile in strong weathering rock, and draws the following conclusions: when steel pipe pile enters the strongly weathered coral limestone surface with 50 hits, The penetration rate is 21.5 mm. 3. The maximum energy transfer coefficient of hydraulic hammer can reach 94.5m when the pile tip is located in strongly weathered rock stratum, and the deepest value of thin-walled steel pipe pile entering the strongly weathered coral limestone layer can reach 7.1m.The penetration is 1.5 mm. The results of high strain of foundation piles D1 and E1 show that when the tip of thin-walled steel tube piles enters the strongly weathered rock layer 3.7 m, the end resistance value increases more slowly, and the resistance value increases 30.8% and 32.8% than that of the newly entered rock end.
【作者單位】： 中交四航局第一工程有限公司;
【分類號】：U655.55
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本文編號：2289628