qwes
发表于2008-8-28
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来自:岩土培训讲义
Unsaturated Flow: Movement of Soil Moisture Water molecules attract each other so that at the surface there is a net downward pull on the molecule. The net effect is surface tension.
最新回复:zhyl0802 2008-8-28 
qwes
发表于2008-8-28
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Stages of Desaturation 1. Complete saturation 2. Air entry 3. Funicular saturation a. Pores dewater from large to small b. Air and water phases are continuous c. Average suction (over REV...
最新回复:zhyl0802 2008-8-28 
sanyor
发表于2008-8-28
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来自:岩土培训讲义
这是国内著名教授的讲稿,内容包括: 深基坑工程在我国的发展; 逆作法与冻结法的应用; 基坑工程的失效模式与案例; 深基坑工程方案设计等。
最新回复:至尊无上 2008-8-28 
qwes
发表于2008-8-27
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来自:岩土培训讲义
Superposition Aquifer flow equation: ∂∂ H T ∂H H T ∂∂ ++ S Q = ∂x 2 ∂y 2 ∂t Subject to: H = A, and/or ∂ H = 0 along some boundary...
最新回复:zhyl0802 2008-8-27 
qwes
发表于2008-8-27
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Importance of Solute Transport in Groundwater • Geologic questions: ion migration, ore deposition. • Environmental problems: contamination of drinking water by organic compounds an
最新回复:zhyl0802 2008-8-27 
qwes
发表于2008-8-26
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来自:岩土培训讲义
History • The earliest model for interpretation of pumping test data was developed by Thiem (1906) (Adolf and Gunther) for o Constant pumping rate o Equilibrium conditions o Confined a
最新回复:zhyl0802 2008-8-26 
qwes
发表于2008-8-26
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来自:岩土培训讲义
随着城市建设的发展,地下空间在世界各大城市中得到开发利用。如高层建筑地下室、地下仓库、地下民防工事以及多种地下民用和工业设施等。在我国,地铁及高层建筑的兴建,产生了大量的基坑(深基坑)工程。 (1)基坑开挖的组成...
最新回复:zhyl0802 2008-8-26 
qwes
发表于2008-8-26
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来自:岩土培训讲义
Simulation: The prediction of quantities of interest (dependent variables) based upon an equation or series of equations that describe system behavior under a set of assumed simplifications.
最新回复:zhyl0802 2008-8-26 
qwes
发表于2008-8-25
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How does the mass of water stored in an aquifer change? Confined Aquifer – Compression of both the material and the water Unconfined Aquifer – Water drains out pores at the water table when the wate
最新回复:zhyl0802 2008-8-25 
qwes
发表于2008-8-25
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来自:岩土培训讲义
Streams • Streamflow is made up of two components: o Surface water component Surface Runoff Direct Rainfall o Groundwater component (baseflow) Seepage through t...
最新回复:zhyl0802 2008-8-25 
qwes
发表于2008-8-22
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来自:岩土培训讲义
Equation of Continuity • Our equations of hydrogeology are a combination of o Conservation of mass o Some empirical law (Darcy’s Law, Fick’s Law) • Develop a control volume, rectan
最新回复:zhyl0802 2008-8-22 
qwes
发表于2008-8-22
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来自:岩土培训讲义
Conceptual picture based on Hubbert’s potentials Recharge Zone between two streams. Discharge Zone (generally 5% to 30% of a watershed) Beneath ridge and valley one gets Groundwater Divide, an i
最新回复:zhyl0802 2008-8-22 
qwes
发表于2008-8-22
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来自:岩土培训讲义
本章学习要求: 掌握土方量计算的方法、场地设计标高确定的方法和用表上作业法进行土方调配。 能了解识别基槽、深浅基坑的各种支护方法并了解其适用范围和基坑监测项目。 理解流沙产生的原因,并了解其防治方法;掌...
最新回复:zhyl0802 2008-8-22 
qwes
发表于2008-8-21
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来自:岩土培训讲义
Unsaturated Zone, Vadose Zone, Soil Moisture Zone, Zone of Aeration – rock, water and air Capillary Fringe – region above water table where water rises due to capillary forces in the porous medium.
最新回复:zhyl0802 2008-8-21 
qwes
发表于2008-8-21
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Pressure at A = atmospheric (po) Pressure at B > atmospheric (po + Δp) Pressure at C = atmospheric (po) But flow is not from A to B to C. Flow is not “down pressure gradient.” Hubbert (194...
最新回复:zhyl0802 2008-8-21 
qwes
发表于2008-8-18
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来自:岩土培训讲义
Where does water come from? It cycles. The total supply doesn’t change much. 3000 BC – Ecclesiastes 1:7 (Solomon) “All the rivers run into the sea; yet the sea is not full; unto the place from
最新回复:zhyl0802 2008-8-18 
qwes
发表于2008-8-15
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来自:岩土培训讲义
地震是内力地质作用和外力地质作用能够引起的地壳震动现象的总称,它是地壳运动在某些阶段发生急剧变化时的一种自然现象。 对建筑工程而言,地震是一种不良地质条件。我国处在世界上最活跃的地震带,东濒环太平洋地震带,西...
最新回复:zhyl0802 2008-8-15 
qwes
发表于2008-8-15
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来自:岩土培训讲义
1 桩基础施工技术现状 111 桩的分类 桩可按荷载机理、材料、形状、直径(或断面)、长度、使用性能及桩端支承情况等多种范畴进行分类, 本节主要涉及以下3 种分类方法。 11111 按材料分类 桩按材料可分为木桩、...
最新回复:zhyl0802 2008-8-15 
qwes
发表于2008-8-14
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来自:岩土培训讲义
第一节 概述 成岩之初岩体是连续的,以后由于构造运动的影响,在岩体中形成各种地质界面,因此被各种结构面切割是岩体的主要特征。岩石是构成岩体的物质,岩体是由结构面和结构体(被结构面包围的岩块)两个基本单元组成。...
最新回复:zhyl0802 2008-8-14 
qwes
发表于2008-8-14
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来自:岩土培训讲义
一、岩爆发生的现象 岩爆是矿井进入深部开采以后更容易遇到的严重的灾害之一。 有记录的岩爆发生的历史 我国岩爆发生的基本情况 岩爆是岩石动力破坏的一种特殊形式 采矿引起岩石破坏的主要形式 1、岩块...
最新回复:zhyl0802 2008-8-14 