目前人们对大直径扩底桩端阻力折减问题有不同的看法。
The current viewpoints on the modifying coefficient problem of end-bearing resistance of large diameter belled piles are different.
主营产品：后扩底机械锚栓、自切底机械锚栓、扩孔钻头。
Main products: After mechanical reamed anchor bolt, anchor bolt, self undercut machine reamer.
结果表明，扩底钻孔灌注桩的使用保证了地基工程的安全性。
The results show that the use of under-reamed bored pile can assure the safety of foundation engineering.
通过实例介绍人工挖孔大直径扩底灌注桩工程量的计算方法。
The paper illustrates the calculation of the amount of work in man-operated well digging and pile depositing with the bottom enlarged in diameter.
结果表明，可用直接试验法和间接试验法确定扩底墩的竖向承载力。
The analysis shows that the pier ultimate bearing capacity can be confirmed by direct test method and indirect test method.
南宁市地王商会中心的楼层高、荷载大，其基础采用了软岩扩底桩。
Enlarged toe piles embedded in weak-rock foundation is adopted in Nanning Diwang Commerce Center for the height of the building is great and the load on it is large.
文章主要介绍监理工程师在人工挖孔扩底灌注桩施工过程的质量控制。
This article mainly introduces quality control based on supervising engineer in course of the construction about the poured pile by artificial excavation expanding bottom.
结合典型工程实例，总结和分析了大直径扩底桩在砂层中的扩底稳定问题。
Based on typical engineering examples, the stability problem of base expansion of large diameter expanded-base piles in sand layer is summarized and analyzed.
本文介绍了我院打破常规在松散残积土层采用砖拱支护扩底施工的成功尝试。
Now it has been used successfully in the residual soil, with brick arch supporting system.
国内外关于扩底抗拔桩的承载力研究较多，而对扩底抗拔桩的位移研究较少。
The domestic and foreign researchers paid more attention to the uplift capacity than to the deformation of the base-enlarged tension piles.
文中提出的承载力取值和沉降计算是一套适合于我国大直径扩底桩的设计方法。
The way to value the bearing capacity and settlement calculation given herein are fit for the design of large diameter belled pile in China.
主营产品：后扩底机械锚栓、自切底机械锚栓、切扩一体式机械锚栓、扩孔钻头。
Main products:After mechanical reamed anchor bolt, anchor bolt, self undercut machine reamer.
人工挖孔大直径扩底桩具有承载能力高，结构传力简明，地质条件合适时沉降小等优点。
Large diameter bulb pile constructed by manual excavation has many advantages, such as high bearing capacity, direct load transfer, and little settlement on proper geological conditions.
试验研究表明，可变式支盘扩底桩可满足工程上高层建筑承载力较高、沉降量较低的要求。
The test research shows that the concrete pour pile with changeable muld-under-reamed enlarged bottom can meet the demands of high bearing capacity and low settlement for high-rise building.
泵吸反循环钻孔扩底灌注桩与人工挖孔灌注桩相比，地质条件的适应性强，施工安全可靠。
Compared to artificial digging-hole pile, the pumping reverse-circulation under-reamed bored pile has higher adaptability to geological condition, and its construction is safety and reliability.
为了了解扩底抗拔桩的抗拔机理和抗浮特点，进行扩底抗拔桩和等截面抗拔桩的试桩试验。
In order to understand float resisting mechanism and its characteristic a test on the bored cast-in-place pile with enlarged bottom and up-lift resistance pile with equal section is carried out.
扩底桩的上拔破坏模式随埋深增大由桩周土体倒圆锥台形破坏变为扩底圆周土体局部破坏。
The failure pattern of the soil around the pile changed from inverted truncated cone slip-surface to local failure around the enlarged base with the increase of embedment ratio.
采用高精度滑动测微计测试AM扩底桩在各级荷载下的桩身应变，测试精度高，测试结果可靠。
The pile strain of AM bulb cast-in-place pile is tested by high precision sliding micrometer, which can have high precision and reliable testing results.
人工挖孔扩底灌注桩是高层建筑常用的一种桩基础形式，其施工质量的好坏直接影响到建筑的结构安全。
Usually the poured pile by artificial excavation expanding bottom is one foundation pile style of tall building, whose quality can affect the structural safety of the construction directly.
扩底后注浆灌注桩是在普通灌注桩基础上通过扩底和后注浆两种施工工艺结合所衍生出来的一种新桩型。
The pedestal post-injected caisson pile is a new type of pile that is derived from the two construction technologies of pedestal pile and post-injecting based on the common caisson pile.
在有限的扩底桩计算公式中，普遍存在着对爆扩桩的承载机理不清楚，对扩大头作用的体现机理表达不准确等问题。
In the limited formula of explosive-enlarged hole pile, there are some unclear expressions of the mechanism in bearing load.
根据同一试验场地厚层非湿陷性黄土状土中8根大直径扩底墩、2根等直径桩的竖向承载力静载试验，对扩底墩的竖向承载性状进行了研究。
Based on the load tests of 8 large diameter belled piers and 2 friction piles, the vertical bearing behavior of the belled pier in non-collapsing loess-like soil is studied.
为了分析不同尺寸条件下扩底墩的承载机理，利用三维有限元，建立墩土接触模型，分析不同墩身长度、扩底直径以及扩大头锅底高度时扩底墩的承载性状。
In order to analyze the bearing mechanism of belled pier with different dimensions, by three-dimensional finite element, a contact model of pier and soil was established.
为了分析不同尺寸条件下扩底墩的承载机理，利用三维有限元，建立墩土接触模型，分析不同墩身长度、扩底直径以及扩大头锅底高度时扩底墩的承载性状。
In order to analyze the bearing mechanism of belled pier with different dimensions, by three-dimensional finite element, a contact model of pier and soil was established.
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