锚桩法静载桩基检测在电厂工程试桩中应用

通过介绍嵌岩钻孔灌注桩基试桩方案和锚桩静载荷试验,分析了单桩竖向抗压极限承载力综合确定以及灌注桩成桩施工工艺的选择.     

青岛某地区嵌岩打入桩静载试验分析

结合青岛某工程3根嵌岩桩静载荷试验,研究了强风化泥质粉砂岩上的嵌岩打入桩承载力和沉降性状。试验结果表明:在竖向荷载作用下,3根试桩均达到了设计要求的单桩极限承载力,桩顶总沉降均小于40mm。     

嵌岩桩承载性状的灰色关联分析

通过不同场地五根嵌岩桩载荷试验结果的灰色关联分析，指出嵌岩桩的实际承载性状与人们的传统认识有着很大差别，从而为嵌岩桩的设计和承载力的计算提供了新的思路。     

嵌岩桩承载力问题的探讨

针对嵌岩桩的特性,在系统分析嵌岩桩承载力影响因素的基础上,对目前确定嵌岩桩承载力的三种方法进行评述,最后对其承载力的确定提出一些建议。     

载荷试验确定CFG桩复合地基承载力的研究

通过对利用载荷试验确定CFG桩复合地基承载力特征值现状的研究,得出了利用多桩复合地基载荷试验(或足尺试验)及单桩复合地基载荷试验准确、合理地确定CFG桩复合地基承载力特征值的方法.     

徐州客运站综合楼嵌岩灌注桩试桩结果分析

当基岩抗压强度较高时，嵌岩灌注桩的承载力往往由桩身材料强度控制。通过对徐州客运站综合楼主楼嵌岩灌注桩试桩结果的分析，提出了正确运用《建筑桩基技术规范》（ＪＧＪ９４—９４）和桩身材料力学性质指标确定由桩身材料强度所决策的单桩竖向抗压极限承载力的方法。     

冲击成孔嵌岩桩事故分析及处理

钻孔灌注桩在桩基工程中广泛使用,由于施工质量影响常出现桩底沉渣、混凝土离析、桩身缺陷等问题,影响桩基承载力。本文针对某工程嵌岩基桩工程出现的质量问题,详细介绍了通过低应变法的波形分析和抽芯验证确定嵌岩桩桩底有无沉渣的方法;分析了嵌岩桩出现桩底沉渣的原因及需要采取的应对措施;根据设计单桩承载力高、废桩比例大和场地狭窄的情况,合理确定补桩数量及位置,对今后桩基工程中此类问题的处理具有一定的参考意义。     

长沙红层嵌岩桩承载力计算探讨

通过对不同规范中嵌岩桩承载力计算取值的对比和对长沙红层嵌岩桩承载力的原位测试分析 ,指出了比较合乎实际的计算方法。     

长沙红层嵌岩桩承载力计算探讨

通过对不同规范中嵌岩桩承载力计算取值的对比和对长沙红层嵌岩桩承载力的原位测试分析,指出了比较合乎实际的计算方法.     

长沙红层嵌岩桩承载务计算探讨

通过对不同规范中嵌岩桩承载力计算取值的对比和对长沙红层嵌岩桩承载力的原位测试分析，指出了比较合乎实际的计算方法。     

循环加卸载下岩石力学性能的加载速率效应研究

矿山开采过程中存在岩石受周期性扰动影响,对岩石的力学性质产生显著影响。为了解不同循环加卸载方式下岩石的加载速率效应,对矽卡岩试样进行不同加载速率的恒下限循环加卸载和变下限循环加卸载试验,对比分析了不同加载速率两种循环加卸载方式下试样的变形特征、能量演化规律以及破坏特性。结果表明：试样的峰值强度和残余变形具有不同加速率效应,但其峰值强度相比于常规单轴压缩试验均有提升;随加载速率增大,试样各阶段的输入能、弹性能和耗散能均呈增长趋势,但表现形式有所差异;试样的破坏方式及形态均表现出加速率效应,随着加载速率的增大其破坏程度加剧。     

Design of automated loading buckets

Conclusions The study has shown the possibility of designing automated loading elements which can make the operation of machines easier, improve the dynamic conditions of work, and raise the efficiency of remote-controlled loaders. The classification of loaders according to the principle of suspension of the bucket and the corresponding schemes of placement of sensors encompasses all underground loading, unloading, and transportation machines, surface frontal loaders, and power shovels with loading units. The horizontal or tangential components of the forces of resistance to bucket advance in the rock pile or the moments from one of these forces relative to the suspension axis of the loading equipment on the gantry can be used as the main control signal; the moment from the resultant force relative to the suspension axis can also be used. Functional flowcharts of systems with automatic scooping of rock mass are suggested for loaders, transporters, frontal loaders, rock loading machines, and power shovels with bucket-type loading equipment. The choice of the placement of sensors, the signals, and the functional flowcharts of the control systems is based on experimental tests of mass-produced front-end loaders TO-1 (T-157) and TO-7 (D-574) manufactured by Berdyansk DORMASh Factory, frontal TO-6 (D-561) made by Orlov Loader Factory, rock-loading mine machine MPR-6, and loader-transporter BD-8M equipped with experimental automatic control systems. The machines have been tested in industrial trials with loading of non-ore materials in quarries, granular and lumpy material at railroad stations, and with the loading of rock masses of different particle sizes in underground mines and quarries. The results of the study are being used in the design of Soviet automated loading and transporting machines at the Institute of Mining Machine Desing and Development; they can provide a basis for developing a family of front-end loaders and power shovels with a bucket-type loading unit. Institute of Mining, Siberian Branch of the Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 79–86, July–August, 1986.     

Triaxial unequal-component loading test system

Institute of Problems of Mechanics, Academy of Sciences of the USSR, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 65-70, March-April, 1992.     

Rock salt deformation under sustained loading

The results of field research of rock salt deformation under sustained uniaxial compression show that the viscoelastic Maxwell medium adequately characterizes time-dependent behavior of deformation parameters. The paper presents the accelerated test procedure and defines the long-term strengths for various types of rock salts from the Upper Kama Potash Deposit.     

载体桩之设计体会

论文通过工程实例,简要介绍了载体桩的成桩工艺,分析了载体桩的受力机理:充分利用了地下较硬土层和钢筋混凝土桩的强度,有效提高了地基承载力;根据建筑物的安全等级、建筑场地情况和结构形式合理选用载体桩,必将产生较好的经济、社会和环境效益.     

AutoCAD线型的定制与加载

介绍了AUTOCAD线型文件的格式和新线型的定制与加载 ,为地质图件的绘制提供各种需要的线型。     

水平气井积液诊断方法及携液模型研究进展

近年来,我国对天然气的需求量逐年增加,目前的天然气产量已经无法满足人民生产生活需求。为了满足生产以及国民生活的需求,我国对天然气田的开发力度不断加大。随着天然气井开采年限的延长,解决气井积液问题成为各大气田提高产量的关键。解决气井积液的难点在于积液判断的准确性和临界携液流量计算的适用性不高,分析了气井积液机理,总结了气井积液的几种诊断方法,为判断积液问题提供了理论依据。对于水平井3个井段的临界携液模型的研究进行了分类和梳理,提高了模型计算的准确性,对目前模型存在的问题和未来的发展进行了总结。