强夯振动对人工岛海堤影响及处理措施
某人工岛工程强夯加固区距海堤很近,强夯振动很可能影响海堤的结构安全,因而非常有必要对强夯振动的影响和隔振措施进行研究。文中论述了2个能级为1500kN·m和3000kN·m的强夯现场试验,并对强夯振动进行了监测,结果表明:无隔振沟时,1500kN·m夯击能对14m外海堤产生13cm/s振动,远大于设计要求的5cm/s的限制;有隔振沟时,3000kN·m能级强夯下海堤处振动速度皆小于5cm/s,满足设计要求,隔振沟对于振动具有很强的削弱作用;除强夯能级外,土层性质对于振动速度也有较大影响。...
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| Published in | 中国港湾建设 Vol. 38; no. 3; pp. 29 - 33 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
2018
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2095-7874 |
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| Summary: | 某人工岛工程强夯加固区距海堤很近,强夯振动很可能影响海堤的结构安全,因而非常有必要对强夯振动的影响和隔振措施进行研究。文中论述了2个能级为1500kN·m和3000kN·m的强夯现场试验,并对强夯振动进行了监测,结果表明:无隔振沟时,1500kN·m夯击能对14m外海堤产生13cm/s振动,远大于设计要求的5cm/s的限制;有隔振沟时,3000kN·m能级强夯下海堤处振动速度皆小于5cm/s,满足设计要求,隔振沟对于振动具有很强的削弱作用;除强夯能级外,土层性质对于振动速度也有较大影响。 |
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| Bibliography: | The dynamic consolidation zone of an artificial island project is very close to the seawall.The vibration of dynamic consolidation may endanger the structural safety of seawall.Therefore,it is very necessary to study the influence of dynamic compaction and vibration isolation measures.We carried out two levels of1500kN·m and3000kN·m dynamic compaction vibration field tests.Test results show that:vibration velocity at seawall14m away at the1500kN·m energy level test without vibration isolation ditch is13cm/s,which is much larger than the design required velocity of the5cm/s limit;vibration velocity at seawall at the3000kN·m energy level test with vibration isolation ditch all less than5cm/s which is accord with the design required velocity;the vibration isolation ditch has a strong weakening effect on vibration;in addition,the layer properties also have a great influence on the vibration velocity. dynamic compaction; vibration velocity; vibration isolation ditch 12-1310/U |
| ISSN: | 2095-7874 |