Based on the principle of variation of earth pressures on the culverts under different conditions, including topography, span of culvert, density of fill and the type of structure, and the property of arching action above the culvert, a nonlinear earth pressure theory for culverts beneath high fill is presented, the theory suggests the earth pressure on the culverts beneath high fill can be calculated with the formula σ=ξγH〓 as the fill up to higher height.

把這種方法與其它地下洞室的土壓力計(jì)算理論進(jìn)行的對(duì)比分析結(jié)果表明，非線性土壓力理論考慮了填土達(dá)到一定高度時(shí)在涵洞上方產(chǎn)生的拱效應(yīng)以及土拱的不穩(wěn)定性特點(diǎn)国产一区91福利在线观看，其計(jì)算的土壓力明顯低于不考慮拱效應(yīng)的低填方涵洞土壓力計(jì)算值欧美黄网站在线观看，但高于具有穩(wěn)定土拱效應(yīng)的地下洞室土壓力理論得到的土壓力。

The fruits of research in the thesis as follow:(1) The principle of variation of earth pressures on the culverts beneath the high fills are investigated in the thesis.

論文通過模型試驗(yàn)和數(shù)值模擬計(jì)算国产无码Av动漫在线观看，研究了狹窄溝谷地形男女猛烈无遮挡午夜视频、寬坦溝谷地形99riav国产原创国产精品、岸坡設(shè)涵和坡腳設(shè)涵四種邊界條件下的高填方涵洞土壓力隨填土高度變化的規(guī)律网站A级，研究結(jié)果表明，在各種邊界條件下在线日韩片精品免费观看，高填方涵洞涵頂土壓力變化規(guī)律相似欧美黑人黄色大片，當(dāng)填土達(dá)到一定高度后，仍有部分土壓力傳遞到涵頂上能看黄的网站在线一区，使高填方涵洞的土壓力不隨填土高度成線性增加，土壓力呈非線性變化，高填方涵洞的土壓力明顯低于理論土壓力σ=γH計(jì)算值国产三级视频试看。

The test results show the principle of variation of pressures on culverts beneath high fill is similar, it is that, even if the embankment is filled up to a higher height, the earth pressures can still partly transfer to the top of culvert, as a result the pressures on the culvert increase nonlinearly with the variation of height of fill and further the pressures are obviously lower than theoretical value by σ=γH.

模型試驗(yàn)和數(shù)值模擬計(jì)算結(jié)果表明，當(dāng)填土達(dá)到一定高度后在线播放18禁AV黄A片不卡，高填方涵洞上方將產(chǎn)生明顯的拱效應(yīng)美日韩AV人人操，但由于涵洞填土為破碎的巖土，其拱效應(yīng)與巖石中開挖洞室上方的拱效應(yīng)不同亚洲精品国产日本能看黄网站，高填方涵洞上方填土產(chǎn)生的"土拱"效應(yīng)具有不穩(wěn)定的特點(diǎn)天天透天天要，表現(xiàn)為隨著填土高度的增加仍有部分土壓力傳遞到涵洞上，涵頂土壓力隨填土高度成非線性增加日韩视频自拍第二页在线播放网站。

To simplify FEM analysis of concrete creep, the function to creep coefficient is proposed as per the Code for Design of Highway RC and PC Bridges and Culverts (JTG D62-2004), using a synthesis optimization software package "1 stopt" for stepped fitting with exponential functions.

為了便于進(jìn)行混凝土徐變有限元分析，對(duì)JTG D62-2004《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》提出的徐變系數(shù)函數(shù)超碰在线播，應(yīng)用綜合優(yōu)化軟件包1stopt進(jìn)行分段指數(shù)函數(shù)擬合。

An average 13 culverts per mile were used, totalling 105 miles of pipe.

平均每1公里公路有8條涵洞管道啪啪啪网战，管道總長(zhǎng)168公里黄色插入啪啪毛片。

During the night, stragglers from the Army engineer company, mostly South Koreans, but some Americans, streamed back off the hill and took cover in the ditches and culverts of Hagaru-ri itself.

在整個(gè)夜里久久黄色大片视频免费无码，陸軍工兵連的潰兵黄色视频免费网站免费，主要是南朝鮮人国产免费A片又爽又舒服，也有美國(guó)人免费的乱婬视频播放网站，連續(xù)不斷地從東山方向逃回下碣隅里的塹壕和藏身洞。

It also analyses corrosion mechanism and influence factor that corrugated steel pipe culverts in the soil, aqueous solution and atmosphere; and proposes the scheme of antisepesis of corrugated steel pipe culvers suitable for our countryAccording to the domestic construction experience and practice on the highway and railway of corrugated steel pipe culverts, this paper summarizes the construction craft of the corrugated steel pipe culverts suitable for our country, and put forward the corresponding construction requirement.

根據(jù)國(guó)內(nèi)鋼波紋管涵洞在公路和鐵路上的施工經(jīng)驗(yàn)和實(shí)踐成人黄色视频网站，分析總結(jié)出適用于我國(guó)鋼波紋管涵洞的施工工藝，提出了相應(yīng)的施工要求A黄片免费。

It has been used for box culverts structure design of Beijing project of South-North Water Transfer and other box culverts projects.

該系統(tǒng)榮獲北京市水利規(guī)劃設(shè)計(jì)研究院優(yōu)秀軟件一等獎(jiǎng)天天干欧美性爱皇冠，并且已經(jīng)用于南水北調(diào)中線工程北京段的箱涵結(jié)構(gòu)設(shè)計(jì)和北京五環(huán)路地下通道的結(jié)構(gòu)設(shè)計(jì)中。

Being a general software, it not only can be used in box culverts structure design for water conservancy project but also suited to culverts structure design for highway and railway projects.

同時(shí)日韩经典自拍电影院在线观看，該系統(tǒng)作為通用的箱涵結(jié)構(gòu)設(shè)計(jì)軟件，不僅可以用于水工箱涵的結(jié)構(gòu)設(shè)計(jì)工作日韩精品合集第一页在线观看，而且還可以用于鐵路无码人妻夜夜爽、交通等建設(shè)領(lǐng)域的箱涵的結(jié)構(gòu)設(shè)計(jì)之中。

According to the calculation data of experimental culverts, Calculation results of all kinds of theories formula, experience method about soil pressure of culverts are compared with measure data.

結(jié)合本次測(cè)試涵洞的有關(guān)計(jì)算數(shù)據(jù)35导航黄片，將國(guó)內(nèi)外現(xiàn)有上埋式構(gòu)筑物的垂直土壓力各種理論公式深夜福利影院、經(jīng)驗(yàn)方法的計(jì)算結(jié)果與實(shí)測(cè)值作了圖示比較，討論了各種方法的優(yōu)缺點(diǎn)在线天堂中文黄色，并給出求解涵洞土壓力的建議公式ⅹxx日本。5。