本文介绍桩身混凝土缺陷的原因分析和改进措施。
The paper analysised the reasons of generating flaw and introduced the methods of improvement.
超声检测灌注桩混凝土强度是指在超声检测桩身混凝土匀质性、完整性的同时确定桩身混凝土的强度。
The Inspection of concrete strength of cast in situ piles by Ultrasonic is to identify concrete strength at the same time to test uniformity and integrality of pile body.
试验结果表明，桩身混凝土随时间的推移不断劣化，主要表现为其中性化深度与时间的平方根成线性关系。
The experimental results indicate that concrete deteriorate continuously with time, mainly presented as that there is a linear relationship between concrete neutralization and square of time.
阐明了声波透射法的原理和方法 ，通过实测工程表明该方法是检测长桩桩身混凝土质量的一种行之有效的手段 ，并提出了现场准确可靠地采集和分析数据的措施。
This paper made a analyses for load transmission principle of piles on weak fundation, and deductived simple method to determine effective length of the extra long piles.
对桩身水下混凝土灌注的质量控制具有一定的指导意义。
It has guiding meaning to the quality control of the underwater concrete pile grouting.
为此采用广角度监测技术，跟踪观测钢护筒、桩身钢筋和混凝土的应力响应。
Therefore, extensive angle monitoring is adopted to observe the structure response of steel casing, reinforcing steel bar and concrete.
采用该分析模型，分析了桩身几何参数、桩顶荷载水平、混凝土弹塑性和桩侧阻软化效应对大直径超长单桩承载变形性状的影响。
The effects of shaft geometry, load level, concrete elastoplasticity and shaft resistance softening on bearing and deformation characteristic of LDSLP were studied by using this model.
通过在南京某高层公寓深基坑支护中的应用，并对其桩身应力、支护结构的侧向位移的实测研究，获得了混凝土芯水泥土搅拌桩支护结构在软土地区受力和变形的基本特征。
According to application of this structure in Nanjing deep excavation, the basic rules of concrete-core DCM pile retaining structure in stress and deformation in the soft soil area were obtained.
现场静载试验检测和低应变检测结果表明，单桩承载力满足设计要求，桩身完整，其混凝土强度达到了设计值，可满足工程需要。
The static load test in-situ and low-strain detection show that the bearing capacity of single pile meets design demand; pile integrity is good; concrete strength of pile reaches design value.
现场静载试验检测和低应变检测结果表明，单桩承载力满足设计要求，桩身完整，其混凝土强度达到了设计值，可满足工程需要。
The static load test in-situ and low-strain detection show that the bearing capacity of single pile meets design demand; pile integrity is good; concrete strength of pile reaches design value.
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