本文關(guān)鍵詞：杭州市區(qū)環(huán)境工程地質(zhì)及軟土地基穩(wěn)定性評價，由筆耕文化傳播整理發(fā)布。

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軟土     

soft-soil(144)

soft clays(20)

  

    STUDY OF SHANDONG HOLOCENE LITTORAL SOFT SOIL AND ITS ENGINEERING GEOLOGICAL HAZARD

    山東全新世濱海軟土與工程地質(zhì)災(zāi)害的研究

短句來源

    Study on an Anisotropic Elasto plasticity Model of Shanghai Soft Soil

    上海軟土各向異性彈塑性模型的研究

短句來源

    ENGINEERING GEOLOGIC CHARACTERISTICS OF SOFT SOIL IN LIAOYANG CITY

    遼陽市區(qū)軟土的工程地質(zhì)特征

短句來源

    Study of engineering geological properties of soft soil in Xiamen Harbour

    廈門港灣軟土的工程地質(zhì)性質(zhì)的研究

短句來源

    An Analysis of Elastoplastic Anisotropic Damage on Soft Soil

    軟土的彈塑性各向異性損傷分析

短句來源

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    The Comprehensive Evaluation of the Environment Engineer Geology and the Stability of Soft Clay Foundation in Hangzhou City

    杭州市區(qū)環(huán)境工程地質(zhì)及軟土地基穩(wěn)定性評價

短句來源

    Study on the Stress-strain Behavior of Soft Clay of Guangzhou

    廣州地區(qū)軟土應(yīng)力應(yīng)變特性研究

短句來源

    Analysis of Principle and Calculation Method on Ground Settlement of Soft Clay Foundations

    軟土地基沉降機理與計算方法分析

短句來源

    Study on Influence of Initial Stress State on Soft Clay in Shanghai

    上海軟土的初始應(yīng)力狀態(tài)的影響研究

短句來源

    Study on Normalized Behavior of Soft Clay in Shanghai

    上海軟土的歸一化性狀研究

短句來源

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    Analysis of deformation of soft ground considering damage

    考慮損傷的軟土地基變形分析

短句來源

    The contact stress and displacement fields of a fill slope on soft ground of a case study are simulated using PFC2D.

    采用顆粒流方法的基本理論,結(jié)合軟土地基上填土土坡穩(wěn)定工程實例,利用二維顆粒流程序(PFC2D)對土坡的接觸應(yīng)力場和位移場進行了模擬。

短句來源

    Characteristic Analyses of Quaternary Changle Formation Soft Ground in the Chengao Harbour Area, Sanduao Bay, South Fujian

    閩東三都澳城澳港區(qū)第四系長樂組軟土特性分析

短句來源

    Sliding Simulation of a Fill Slope on Soft Ground Using PFC2D

    軟土地基上填土土坡滑動顆粒流模擬

短句來源

    Analysis on Factors Affecting Deformation of Adjacent Buildings Caused by Construction of Deep Foundation Pit in Soft Ground and Countermeasures

    軟土地層深基坑工程對鄰近建筑物變形影響因素分析和應(yīng)對措施

短句來源

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    Research on rheological parameters of sullage soft-soil and BP neural network model

    淤泥質(zhì)軟土流變參數(shù)及BP神經(jīng)網(wǎng)絡(luò)模型研究

短句來源

    Studies of Microstructures of Soft-soil from the Pearl River Delta by Means of SEM

    珠江三角洲軟土微結(jié)構(gòu)的掃描電鏡研究

短句來源

    THE ENGINEERING GEOLOGICAL FEATURE OF SOFT-SOIL IN YUANJIANG

    沅江軟土工程地質(zhì)特征

短句來源

    The following research work has been deployed around the problem of the influencing factor of settlement and prediction of settlement on soft-soil ground for different processing method. Research on settlement influence factor of deep mixing pile and vertical drainage body through method of analysis, calculation and analytic, achieve influencing factor of different processing method.

    本文圍繞軟土地基處理方法對沉降的影響因素和沉降預(yù)測，通過假設(shè)、計算、分析的方法，獲得了深層攪拌樁法、豎向排水體法處理軟土地基對沉降的影響因素。

短句來源

    For these settlement influence factors, adopts BP-ANN to make the model directly base on field test data of Lian-Xu expressway, and uses MATLAB to programming for predicting settlement of soft-soil ground embankment.

    對分析后的沉降影響因素，利用BP神經(jīng)網(wǎng)絡(luò)在MATLAB中進行編程，，結(jié)合連(連云港)—徐(徐州)高速公路軟土地基沉降實測數(shù)據(jù)，建立沉降預(yù)測模型并進行了預(yù)測分析。

短句來源

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  soft soil

Design of a shaking table test box for a subway station structure in soft soil

      

A model box has been designed for the shaking table test of a subway station structure in the soft soil of Shanghai in the paper.

      

Under cyclic loadings, the plastic strain of soft soil will take place under very small shear strain.

      

So the visco-plastic model is appropriate to be used to model the dynamic characteristics of soft soil.

      

The predicted stress-strain relationships of soft soil are compared with the test results given by dynamic triaxial tests.

      

更多          

  soft clay

Experimental investigation of the influence on static and cyclic deformation of structural soft clay of stress level

      

The consolidation tests indicated that the vertical strains of undisturbed soft clay could be divided into three stages with load increasing, however, the remolded clays were almost independent of stress level.

      

The strains developed during cyclic tests of undisturbed and remolded soft clay, both having one turning point under different amplitude of cyclic stress.

      

Furthermore, the turning points of the remolded clay all fell on the same line of different confining stresses, including which of the undisturbed soft clay under confining pressure was larger than structural yielding stress.

      

It was also found that the deformation characteristic of undisturbed and remolded Xiaoshan clay tend to be consistent when the structure of undisturbed soft clay is damaged.

      

更多          

  soft ground

An equation is obtained which describes the propagation of long wave seismic signals of finite amplitude in soft ground.

      

Vacuum consolidation is a soil improvement technique that accelerates consolidation of soft ground by using the action of the atmospheric pressure in combination with a ground pore-pressure relief system.

      

Applying vacuum consolidation method with horizontal drain in order to improve reclaimed soft ground, non-linear finite consolidation phenomenon takes place.

      

Recently in China, soil-cement is widely used to improve the soft ground in the highway construction engineering.

      

No site on soft ground can be made as safe as a site on bedrock, independently of the SSE which is used, since seismic effects are random.

      

更多          

  soft-soil

The worst stations of the original GRSN were Berlin (BRLN), Hamburg (HAM) and Liddow (LID), all placed on unconsolidated soft-soil cover, between 50 m (at LID) and about 1.5 km thick (at HAM).

      

But no spectral noise peaks due to wave resonance in this soft-soil cover could be identified because the noise spectra at all these sites are clearly dominated by strong ambient noise sources (traffic, industry and/or coastal surf sea-noise).

      

Such phenomenon was frequently observed at soft-soil stations deployed in the Chia-Nan plain when a very shallow earthquake occurred.

      

These instruments provide additional response measurements of soft-soil sites in San Francisco.

      

The subjects continue through health monitoring, strong ground motion simulation, and soft-soil site effects.

      

Taking into consideration the historical seismic information, the mechanical properties of the ground layer in boreholes and the data on the local earthquake damage, it is concluded that in the Quaternary weak interbed of the littoral region the Qiongzhou earthquake caused such phenomena as liquation of soil soil flow, damage of foundation, and the like, which are responsible for the land subsidence in this seismic region.

本文通過地震史料考證,野外地質(zhì)調(diào)查,鉆孔土層力學性質(zhì)分析,場地震害考察等資料的研究,認為瓊州歷史地震在濱海地帶第四紀軟弱土層中誘發(fā)了砂土液化、軟土流滑、造成地基失效、場地不均勻沉陷的情況,是導致震區(qū)內(nèi)特殊地段“陸地沉陷”的主要原因。

The finite element method for analysing the effects of irregular topography on earthquake ground motion is presented in this paper. The emphases is laid on the discussion about the differences of the effects of irreguular topography induced by the different soil conditions. The computer program also dealt with here.

對我國近年來幾次大地震的震害考察中發(fā)現(xiàn)弧突山梁及弧立山包的頂部震害都比較重,國外也有不少類似的實例。雖然這種弧突地形條件對震害的不利影響,人們早已有了定性的認識,但對這個問題的定量研究,則遠遠不夠深入。因此各國規(guī)范都還沒有列入關(guān)于弧突地形條件的定量評價方法。在我國地形條件對地面運動及震害的影響問題是一個重要的有意義的課題。世界上近年來已發(fā)表了不少關(guān)于這個問題的論著,其中大部分都是采用解折法,並假定山體為某種簡單的幾何形體。對于復(fù)雜的不規(guī)則地形,解折法很難得出符合實際的結(jié)果。有限元法是研究復(fù)雜地形的有效工具。但三維有限元常常要求大型快速電子計算機,工作量大,費用昂貴。本文提出雙向剪切變形有限元模型,它可以把三維問題簡化為二維問題,使計算工作大為簡化。震害經(jīng)驗表明:由不同巖土條件構(gòu)成的地形,對地面運動的影響也有顯著差異。一般來說,堅硬基巖地形要比軟土條件的地形對震害影響要輕。黃土地區(qū),由于黃土松軟,地形條件又比較復(fù)雜、因此地形條件對震害的影響要比一般非黃土地區(qū)更為顯著。本文重點是討論不同巖土條件的不規(guī)則地形對震害影響的差異。主要結(jié)論如下: 1)地形條件對地面運動及震害的影響表現(xiàn)在兩個方面,地震加速度的...

對我國近年來幾次大地震的震害考察中發(fā)現(xiàn)弧突山梁及弧立山包的頂部震害都比較重,國外也有不少類似的實例。雖然這種弧突地形條件對震害的不利影響,人們早已有了定性的認識,但對這個問題的定量研究,則遠遠不夠深入。因此各國規(guī)范都還沒有列入關(guān)于弧突地形條件的定量評價方法。在我國地形條件對地面運動及震害的影響問題是一個重要的有意義的課題。世界上近年來已發(fā)表了不少關(guān)于這個問題的論著,其中大部分都是采用解折法,並假定山體為某種簡單的幾何形體。對于復(fù)雜的不規(guī)則地形,解折法很難得出符合實際的結(jié)果。有限元法是研究復(fù)雜地形的有效工具。但三維有限元常常要求大型快速電子計算機,工作量大,費用昂貴。本文提出雙向剪切變形有限元模型,它可以把三維問題簡化為二維問題,使計算工作大為簡化。震害經(jīng)驗表明:由不同巖土條件構(gòu)成的地形,對地面運動的影響也有顯著差異。一般來說,堅硬基巖地形要比軟土條件的地形對震害影響要輕。黃土地區(qū),由于黃土松軟,地形條件又比較復(fù)雜、因此地形條件對震害的影響要比一般非黃土地區(qū)更為顯著。本文重點是討論不同巖土條件的不規(guī)則地形對震害影響的差異。主要結(jié)論如下: 1)地形條件對地面運動及震害的影響表現(xiàn)在兩個方面,地震加速度的放大和地面運動頻譜特征的改變。這兩種影響都是對建筑物的抗震不利的。不同巖土條件的地形對地震地面運動的影響也不同。土質(zhì)越軟地形對震害的不利影響越明顯。對堅硬基巖,當高度低于30m,這種影響就不甚顯著。2)由于黃土特別松軟、所以黃土山梁,對霧害的影響也就特別顯著對黃土山梁當山梁高度較低土質(zhì)較梁時,山梁上部加速度的峰值要比其基底處的輸入加速度大,但當山梁較高而土質(zhì)較軟時,山梁加速度反應(yīng),將隨山梁高度的增加而降低。在這種情況下,山梁的位移反應(yīng),總是隨著山梁高度的增加而明顯增大。3)山梁地面運動加速度反應(yīng)譜特征,與其介質(zhì)性質(zhì)和幾何形態(tài)有密切關(guān)系。對于堅硬基巖的山梁,其對震害的不利影響主要表現(xiàn)在加速度的放大方面。對于軟土山梁其不利影響主要表現(xiàn)在地面運動頻譜的改變方面。這種加速度的放大和頻譜特征的改變都是對建筑物的抗震不利的。

In this paper, we are rolling in damage data and the results of a laboratory tests. A set of predictable method that is satisfactory to China's Northwestern sites damage are established with the principles of information distribution, fuzzy multifactorial evaluation and information concentration. Site is classified into three sorts: stable region, stable region in the main and non-stable region. Evaluated paramenters are geography and geomorphology, soil liquefaction potential, loess settlement, the thickness...

In this paper, we are rolling in damage data and the results of a laboratory tests. A set of predictable method that is satisfactory to China's Northwestern sites damage are established with the principles of information distribution, fuzzy multifactorial evaluation and information concentration. Site is classified into three sorts: stable region, stable region in the main and non-stable region. Evaluated paramenters are geography and geomorphology, soil liquefaction potential, loess settlement, the thickness of artificial filled soil, the depth of soft soil and slope stability. The damages of a few sites of Xian and Baoji Cities are evaluated by this method. And its results are in keeping with those of macrosopic analysis. This paper provide the prediction of China's Northwestern sites damage with a kind of quantitive reseach method. At same time, it is of importance to reseach of seismic microzonation.

本文收集了西北地區(qū)大量的震害資料及實驗室試驗結(jié)果,利用信息分配,模糊綜合評判及信息集中等原理建立了一套適用于西北地區(qū)的場地震害的預(yù)測方法。文中將場地分為三類:穩(wěn)定區(qū)、基本穩(wěn)定區(qū)和不穩(wěn)定區(qū)。以地形地貌、土的液化、土的震餡、人工填土的厚度、軟土(厚度大于0.3米)的埋深以及邊坡穩(wěn)定性等六個因素作為評價的指標。用這套方法對寶雞、西安兩市的一些場地震害進行了評價計算,其結(jié)果與宏觀分析的結(jié)果一致。

 

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  本文關(guān)鍵詞：杭州市區(qū)環(huán)境工程地質(zhì)及軟土地基穩(wěn)定性評價，由筆耕文化傳播整理發(fā)布。

本文編號：171584