题目内容

已知墙下条形基础的底面宽度为2.5m,墙宽0.5m,基底压力在全断面分布为三角形,基底最大边缘压力为200kPa,求作用于每延米基底上的轴向力和弯矩。

查看答案
更多问题

对强风化较破碎的砂岩采取岩块进行了室内饱和单轴抗压强度试验,其试验值为9MPa、11MPa、13MPa、10MPa、15MPa、7MPa,据《建筑地基基础设计规范》(GB50007—2011)确定岩石地基承载力特征值的最大取值。

The Internet, E-commerce and globalization are making a new economic era possible. In the future, capitalist markets will largely be replaced by a new kind of economic system based on networked relationships, contractual arrangements and access rights. Has the quality of our lives at work, at home and in our communities increased in direct proportion to all the new Internet and business-to-business Internet services being introduced into our lives I have asked this question of hundreds of CEOS and corporate executives in Europe and the United States. Surprisingly, virtually everyone has said, "No, quite contrary." The very people responsible for ushering in what some have called a "technological renaissance" say they are working longer hours, feel more stressed, are more impatient, and are even less civil in their dealings with colleagues and friends—not to mention strangers. And what’s more revealing, they place much of the blame on the very same technologies they are so aggressively championing. The techno gurus (领袖) promised us that access would make life more convenient and give us more time. Instead, the very technological wonders that were supposed to liberate us have begun to enslave us in a web of connections from which there seems to be no easy escape. If an earlier generation was preoccupied with the quest to enclose a vast geographic frontier, the .com generation, it seems, is more caught up in the colonization of time. Every spare moment of our time is being filled with some form of commercial connection, making time itself the most scarce of all resources. Our e-mail, voice mail and cell phones, our 24-hour Internet news and entertainment all seize for our attention. And while we have created every kind of labor-and time-saving device to service our needs, we are beginning to feel like we have less time available to us than any other humans in history. That is because the great proliferation of labor-and-time-saving services only increases the diversity, pace and flow of commodified activity around us. For example, e-mail is a great convenience. However, we now find ourselves spending much of our day frantically responding to each other’s electronic messages. The cell phone is a great time-saver. Except now we are always potentially in reach of someone else who wants our attention. Social conservatives talk about the decline in civility and blame it on the loss of a moral compass and religious values. Has anyone bothered to ask whether the hyper speed culture is making all of us less patient and less willing to listen and defer, consider and reflect’ Maybe we need to ask what kinds of connections really count and what types of access really matter in the e-economy era. If this new technology revolution is only about hyper efficiency, then we risk losing something even precious than time—our sense of what it means to be a caring human being. In the sixth paragraph, the author implied that

A. social conservatives blamed the loss of morality on technology.
B. the .com generation was less civil than the earlier generations.
C. the hyper speed culture led to the decline in civility.
D. technology might make people less impatient.

某基础尺寸1.0m×1.m,埋深2.0m,基础置于3m×3m的基坑中持力层为黏性土,黏聚力ck=40kPa,内摩擦角φk=20°,土重度γ=18kN/m3,地下水位埋深地面下0.5m,试计算地基承载力特征值。

已知p1为已包括上部结构恒载、地下室结构永久荷载及可变荷载在内的总荷载传至基础底面的平均压力(已考虑浮力),p2为基础底面处的有效自重压力,p3为基底处筏形基础底板的自重压力,p4为基础底面处的水压力,在验算筏形基础底板的局部弯曲时,试求作用于基础底板的压力荷载值,并说明理由。

答案查题题库