On the base of analysis concerning Tianjing and Tanggo-Xingang soil properties and observation results of settlements, some rules of settlement of buildings in the area were obtained. Final settlements, settlements at end of construction and the time of final settlement were discussed. Tests used for determining paramcters of four models were introduced. The parameters in Duncan-Chang model are determined from isotropic consolidation test and the parameters in Gong-Xiannan model from Ko consolidation tests while the parameters in the model proposedin chapter 2 from the equal increment stress ratio test and ones in the bounding surface model developed in chapter 3 from the effective stress-path of CIU test.

根據(jù)天津市區(qū)及塘沽新港地區(qū)的地基土質(zhì)情況以及沉降觀測(cè)資料黄色网址视频在线观看，分析了該地區(qū)建筑物沉降的一些規(guī)律國產黃片，討論了最終沉降量91国在线国内播放女神学生，完工時(shí)的沉降量以及沉降穩(wěn)定時(shí)所需要的時(shí)間国产黄色网站在线免费，介紹了確定各模型參數(shù)所需要的試驗(yàn)：Duncan—Zhang模型參數(shù)根據(jù)等向固結(jié)的三軸試驗(yàn)確定男人操女的亚洲国产视频；龔曉南Ko固結(jié)模型根據(jù)Ko固結(jié)三軸試驗(yàn)確定色色色色色色色色色色网；本文建立的非線性彈性模型根據(jù)等向增量應(yīng)力比試驗(yàn)確定，邊界面模型參數(shù)可根據(jù)固結(jié)不排水剪切試驗(yàn)的有效應(yīng)力路徑確定97无码精品一区二区。

The results show: the most sensitive Chinese area to acid deposition is Podzolic soil area, then follow Latosol, Dark brown forest soil and Black soil areas; Ferraisol and Yellow-brown earth area in southern China can buffer about 0.8-1. 6 g Sm〓yr〓 sulfur deposition; the least sensitive areas to acid deposition are mainly Xerosol area in northwest China, Alpine soil area in the Qingzang Plateau, and Dark loessial soil and Chernozem areas; the main reason for lower critical load in northeastern areas and higher critical load in Ferralsol and Yellow-brown earth areas in China can be attributed to the obvious difference in temperature, humidity and soil properties.

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Sedimentation anyslys of soil under the action of deadweight; 2 Sedimentation anyslys of structure in using; 3 Endogen force anyslys of structure in using; 4 Soil remolding type anyslys; 5 Homogenous flush works anyslys; 6 Anyslys of the structure sedimentation effects of different flushing amount at the same place; 7 Anyslys of the structure sedimentation effects of different flushing places; 8 Anyslys of the structure sedimentation effects of different horizontal flushing places; 9 Anyslys of the structure sedimentation effects of different vertical flushing places; Getting the different between the endogen force of common structure and that of slant structure.

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At the same time combined with indoor maximum dry density test,this paper discusses the possibility that rock-filling construction quantity .Then data of densification quantity examination under the condition ofdifferent filling material.densification machinery.densification parameter and lay-down thickness are collected as the analytic object. On the basis of making a statistical analysis of experiment data ,supervisory standard and assessment method of settlement difference and settlement ratio that adopted to examine rock-filling embankment construction quantity are put forward systematically At last carrying on settlement observation tests of rock-filling embankment in different construction stage in different layer ,the dependability of assessment method is validated.

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Under the condition of the slide between pile and soil around pile is taked into account,five equations are established, including the equation of compatibility between the settlement of pile cap soil and the settlement of pile cap; the equation of compatibility between the settlement of pile head soil and the settlement of pile head; the physical equation between the settlement of soil around pile shaft and the settlement of pile shaft;the equation of equilibrium between loads on the pile cap, side frictional stress and restraints of pile head; the equation of compatibility between the deformation of the pile body and the subtraction between the settlement of pile cap and the settlement of pile heap.

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In the later half of the article, we adopt random analysis method to make preliminary study to the backfilled foundation and then analysis random influence factors that effect the settlement degree of gantry crane foundation. We used JC method to study the reliability of the settlement and Non-Uniform settlement degree of gantry crane foundation based on factors which influence the last settlement degree of railway foundation, and the same time, we utilized backfill construction parameter and the actual statistics data of earth backfilled on site.

本文后半部分一本A片，應(yīng)用隨機(jī)分析方法對(duì)該回填基礎(chǔ)進(jìn)行了初步的研究免费国产黄网站在线观看，分析了影響高架門機(jī)基礎(chǔ)沉降量的隨機(jī)影響因素，確定了沉降分析的計(jì)算模型曰韩美女乱婬免费视频网站，結(jié)合影響軌道基礎(chǔ)最終沉降量的多種因素，利用施工現(xiàn)場(chǎng)實(shí)測(cè)回填土土性數(shù)值和回填施工參數(shù)国产黄色性爱视频，對(duì)高架門機(jī)基礎(chǔ)沉降量和不均勻沉降進(jìn)行了可靠性評(píng)價(jià)免费在线观看视频被多人操。

The data from stress box indicate that the observed values usually are smaller than the theoretical ones, and the relationship between the vertical or lateral stress and the fill soil thickness can be described in a power function curve: a- a hb. The fact that the soil stress is bigger in the portion adjacent to the central part of gully and becomes smaller in the portion close to the side illustrates that the gully has an apparent unburdening effect. From the monitoring results of the settlement deformation during and after constructingperiod, the study conducts statistical system analysis and evaluation on the change of settlement with time.

根據(jù)壓力盒測(cè)試結(jié)果表明，測(cè)量值往往比實(shí)際的理論計(jì)算值小www.99cao.com，填土的豎向和側(cè)向土壓力與填土厚度可以用冪次型曲線表示：σ=ah~b愈向溝谷中心部位亚洲人成三级黄片观看，土壓力值愈小，愈向溝谷邊緣男女免费视频在线观看网址，土壓力數(shù)值越大成人播放日韩在线播放AV，說(shuō)明溝谷邊坡具有明顯的卸荷作用；根據(jù)施工期和工后期的沉降變形監(jiān)測(cè)數(shù)據(jù)国产三级伦吃奶在线播放，對(duì)路堤內(nèi)各測(cè)點(diǎn)的豎向沉降隨時(shí)間的變化規(guī)律進(jìn)行了數(shù)理統(tǒng)計(jì)系統(tǒng)分析和總結(jié)狠狠久久精品伊人，工后期路面沉降和時(shí)間關(guān)系可用對(duì)數(shù)曲線表示：S=aln+b，并根據(jù)此沉降規(guī)律對(duì)高填方加筋土路堤的工后沉降進(jìn)行了預(yù)測(cè)婷婷综合热。

Based on the analysis of the factors caused land subsidence, the internal mechanism and development process of land subsidence caused by two mainly factors of dewatering and underground mining have been studyed in this thesis. The random medium model and methods have been established to calculate the land subsidence and deformation caused by dewatering or underground minging and both of them. The prediction problem of land subsidence and deformation caused by single factor and many factors has been solved.

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For each strategy, a corresponding exploitation plan of groundwater was designed. Then each designed exploitation plan (except scheme 3) was put into the model for calculation and simulation. The analysis on the forecasting results every plan indicates that:(1) Shuting down the self-provided wells is the most direct and effective method, playing an important role in the land subsidence prevention.(2) The resumption of compressed soil by groundwater artificial recharge is limited. So the artificial recharge can\'t provide essential effect for the resumption of land subsidence, unless the artificial recharge is much more than the groundwater withdrawal.(3) The method of "adjusting the exploitation stratum of groundwater to the shallow" has an obvious effect on the land subsidence prevention.(4)"Sand wells" can increase the leakage recharge for confined aquifer, and thus can slow and prevent the development of the land subsidence.(5) For the groundwater exploitation in Xi\'an, emergency self-provided wells should be managed according to the well spacing of 1600m, 2000m and 1600m, respectively, in the river terrace area, alluvial-proluvial fan area and loess tableland area to exploit the first confined groundwater. Corresponding individual well yield can be set as 2500m~3/d, 1500 m~3/d and 200 m~3/d. Make emergency self-provided wells pump in the dry year and stop pumping groundwater to restore and conserve underground water sources in average years and wet years. In this way, groundwater withdrawal of 162000m~3/d can be obtained to provide for the supplement of water supply in Xi\'an. As a result, the water supply stress can be released in dry years. The groundwater depression formed in the exploiting year can resume in 3-4 years. At the same time, this exploitation manner will not lead to obvious land subsidence.

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By the FEA model that the recharge effect had been taken into account, the surface settlement and the surface differential settlement of the ground surface which was out of the recharge position could be greatly reduced, the recharge effect at far foundation pit wasmuch more apparent than at the near position. By the FEA model that the water-seal effect had been taken into account, the surface settlement and surface differential settlement of the ground surface could be largely reduced; the reduction of the total settlement and the differential settlement increased as the length of water-seal wall grew.

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