The extruding effect in driving piles influences the quality of the completed piles in soft soil area. The monitoring of excess pore water pressure,as an important monitoring method,is very meaningful to guide the information construction of piles. Owing to the incomplete consideration on the characteristics of bound water and soil strength,the current monitoring criterion of excess pore water pressure is not applied well in engineering practices. In the paper,the strongly-combined water is assumed as a part of soil skeleton,by which the calculation method for effective overburden pressure in saturated soft clay is modified,and the monitoring criterion of excess pore water pressure based on theoretic equation for excess pore water pressure of soil induced by the single pile driving is established. This criterion preferably reflects the effects of controlling speed and changing area in driving piles on the variation of excess pore water pressure.

Driving pile group in soft soil is a difficulty in geotechnical engineering,and it is also a problem in construction of big power plant in river basin and costal area.In this paper,the practice of pile engineering for a big fossil power plant is discussed from the following aspects:geotechnical engineering investigation,integrated pile tests and informational monitoring in driving piles.

In combination with compiling for Techical Code of Investigation for Nuclear Power Plant,the present existing issue of geotechincal engineering investigation in preliminary feasibility stage of nuclear power plant are discussed and relevant approaches are given.

Based on the results from the numerical calculation, some aspects of the seismic response of soil layer varying with artificial boundary, the scope of soil region, damping coefficient etc., are discussed. With linear visco-elastic assumption analytical solution in time domain and the formula of transforming frequency derived from lag-damping coefficient are given. Finally, we developed the computer program SR2D which may perform 2-dimensional finite element analysis.

该文简要介绍了自平衡法试桩的原理和方法,并根据上海吴淞口大跨越工程实例总结了相关经验,以便该方法在上海地区推广应用和深入研究.

论述电力系统开展电力工程地震安评工作的内容、模式、管理程序及其必要性.

本文介绍了在水泥土搅拌桩中插入型钢形成一种新型的地下连续墙支护结构(SMW墙),该墙体充分利用了水泥土搅拌桩的高止水性和型钢所具有的强度和刚度;而在完成基坑施工之后,可取出型钢,供重复使用,这不仅降低了工程造价,而且减少了墙体的厚度,在窄小的施工场地特别适用.

选择合适的优质砂源和冲填工艺、合理安排冲填流程是保证填海造陆建筑场地地基均匀的前提,针对冲填后的场地上采用排水固结预处理是提高地基承载能力、降低地基沉降量的重要措施.

常用的水泥土搅拌桩复合地基和挡土墙在软土地基加固和基坑围护工程中普遍应用,但是水泥土搅拌桩的强度较低,因此承载能力不高.加芯水泥土搅拌桩以预制的钢筋混凝土小桩作为核心,插入水泥土搅拌桩中形成复合桩,使其获得较高的承载力,而且没有打入桩的噪音和挤土,没有钻孔灌注浆的泥浆污染,是一种经济效益和社会效益较高的新桩型.

电厂灰场采用多级子坝分期建设的方案档仅加快了工程进度,节约了投资造价,而且充分利用坝内储存的灰渣干滩作为子坝的地基,降低了筑坝的费用,而在实现子坝工程地基稳定条件方面,灰场排水固结是最为重要的措施,本文介绍最新的软式透水管在徐州电厂川里湖灰场应用的成功例子,说明土工织物的一种--软式透水管的实效.

本文用配点法对流体——重力式锥状单腿平台结构——土相互作用体系在地震作用下的动力响应问题进行了研究。采用频域分析法，将锥柱体Ｎ等分，利用运动方程和边界条件联立解方程组，继而求出平台结构顶端弹性位移和腿柱所受的动水压力、基础平移和基础转角的频响函数。分析不同锥角下体系的动力响应的影响，并分析研究了刚性地基和考虑土——结构相互作用时结构体系的动力响应情况，得到一些很有益的结果。