抛石棱体分层强夯工艺在重力式码头施工中的应用

重力式码头前后轨道梁的沉降差异是港口建设的难题。前轨道梁作用在沉箱上，沉降量不大，沉降过程在施工期基本能够完成；后轨道梁一般作用在棱体上，考虑到沉箱的安全，一般不采取夯实处理措施，靠回填料自身密实，导致在使用期沉降量明显大于前轨，影响设备运行。若采取灌注桩基础，由于灌注桩需要穿透块石或开山石的棱体，给灌注桩施工带来很大难度。以国投曹妃甸煤码头续建工程为例，采用棱体陆上、水下多层强夯工艺，有效缓解了前后轨道梁沉降差异的问题，获得了良好的经济效益和社会效益，并为类似工程结构设计及施工提供参考依据。

Application of riprap prismatic layered dynamic compaction technology in gravity quay construction

Differential settlement of track beams before and after gravity quay has long been a difficult problem to harbor construct.The front track beams act on caissons,the settlement is not large,and the settlement process can be basically completed during construction period.The rear track beams generally act on prisms,and tamping measures are generally not adopted considering the safety of caisson.The backfill itself is compacted,resulting in a significantly large settlement during the service period,which affects the operation of the equipment.If the cast-in-place pile foundation is adopted,because the cast-in-place pile needs to penetrate prism with block stone or karst stone,which brings great difficulty to the construction of cast-in-place pile.Taking Caofeidian Coal Terminal of Guotou as an application example,this paper adopts prism multi-layer dynamic consolidation technology on land and underwater,which effectively alleviates the differential settlement between front and rear rails,obtains good economic and social benefits,and provides a reference basis for the design and construction of similar engineering structures.