浅谈五缘湾2013P03钢筋混凝土预制方桩施工的质量控制

随着社会经济的飞速发展,城市建设的统筹规划。福建沿海滩涂地带将涌现出越来越多的超高层建筑。建筑的形式大多选择框架结构,其地基选择桩基础。结合五缘湾2013P03地块实际工程的施工,简要分析影响预制方桩施工的各种因素,并提出了相应的改善措施。

钢筋混凝土预制方桩在沭南闸施工中的技术要点分析及控制

钢筋混凝土预制桩在沭南闸拆建施工中为重要的基础工程,如何保证打桩的质量是保证基础稳定性的重要措施。本研究从地基处理、桩型及设计要求、桩位测量放样、桩进场验收及施打过程控制、桩的垂直度、深度、标高及终止值的控制等方面阐述了钢筋混凝土预制方桩施工的主要技术要点和质量控制措施。

水磨钻施工技术辅助人工挖孔桩施工技术

随着城市交通事业的发展,跨线及紧邻修建工程的情况日益增多,紧邻施工对工艺的要求较高,施工技术水平随之提高。一般情况下,采用常规方法便能解决施工中遇到的问题,但特殊情况下,常规施工方法无法解决。在岩层硬度较高的特殊路段且附近有河流、铁路、隧道、桥梁等构造物的桩基施工过程中,采用人工或炸药破除的效率低且对周边的扰动大,在既要确保安全又不影响既有构筑物正常使用的要求下进行桩基施工时,难度极大。我司在进行张社大道K0+410-K0+670段挡墙人工挖孔方桩施工时就遭遇了上述情况,经筛选多种方法后,最终选择了采用水磨钻施工技术解决上述难题,取得了较好效果。

钢筋混凝土中预制桩施工问题及质量控制措施

随着社会经济的高速发展以及城市化建设的持续深入,我国经济已经进入全新的发展进程中,这也为建筑工程行业的发展起到了良好的促进作用。而站在建筑工程实际情况的角度上来看,钢筋混凝土预制桩施工已经得到了较为广泛的应用,属于建筑施工阶段中至关重要的内容,甚至会直接影响到建筑工程项目的整体质量。所以,为了更好地满足现代化建筑对于建筑结构的多样化需求,施工企业就必须要提高对于钢筋混凝土预制桩施工技术的重视程度。因此,文章首先对建筑钢筋混凝土预制桩的制作要点与基本条件加以明确;其次对钢筋混凝土预制桩施工技术的问题与预防措施展开深入分析;最后在此基础上,提出钢筋混凝土预制桩施工技术的质量控制措施,以期为后期相关施工提供参考。

Verification of Seismic Performance of Pile Foundation in Composite Ground through Experimental and Numerical Methods

A new construction method of pile foundation in composite ground, in which, prior to installing piles, the ground is improved around the heads of the piles in soft ground or ground subject to liquefaction, which is introduced in this paper. This construction method uses a combination of pile foundation construction together with common ground improvement methods, including deep mixing, preloading and sand compaction piling, and it is referred to as the composite ground pile method. Since an artificial ground with relatively high rigidity comparing with that of the original ground was formed around the pile in this method, and the seismic performance has not been made clear, thus the seismic performance of piles in composite ground was systematically analyzed through a series of centrifuge model tests and numerical analyses by using dynamic nonlinear finite element method, and a verification method for the seismic performance of piles in composite ground was proposed on the basis of the experimental and numerical results.

Discussion of Construction Related to Sheet-piled Wharf

In this paper, firstly, the characteristics of sheet-piled wharf construction are introduced. And then, six aspects of sheet-piled wharf construction are discussed： sheet pile, anchorage structure, guiding girder, anchor rod, backfilling behind sheet pile wall, superstructure of sheet-piled wharf etc. The construction of sheet pile involves piling on the land or piling？on？the sea, piling methods, piling patterns, guide frame, embedding sheet piles etc.