Based upon analysis and calculation of steel headframe and foundation reinforcement scheme is proposed.

結(jié)合工程概況欧美爱视频，針對(duì)原有鋼井架已不能滿足使用要求的問(wèn)題，對(duì)煤礦提升系統(tǒng)進(jìn)行了技術(shù)改造真人一放A片免费视频，對(duì)鋼井架及基礎(chǔ)進(jìn)行了分析和計(jì)算国产同人导航在线观看AV，并提出了加固方案，加固后效果良好精品伊人久久大线色首页，可為類似工程提供參考岛国欧美黄色网站视频。

The safety of a main well headframe would be reduced significantly,due to increased loading capacity and higher vibration frequency in a coalmine.

由于煤礦主井井架提升能力的增加，引起井架桿件受力增大99久久精品国产一级aaa，受迫振動(dòng)頻率增大国产精品久久一区二区三区青青，導(dǎo)致安全性能降低。

A finite element model using the structural analysis software,SAP2000,was created to study the headframe's natural vibration characteristics and the state of member forces.

應(yīng)用SAP2000有限元軟件性生活黄色网站，建立三維有限元模型黄色手机黄色网站在线播放，對(duì)其自振特性和加固前后的桿件應(yīng)力進(jìn)行了對(duì)比分析，加固后桿件最大應(yīng)力大大降低日本,三级黄色片；通過(guò)加固前后不同荷載下的動(dòng)力測(cè)試女人一级免费视频a，對(duì)加固后井架的運(yùn)行狀況作出評(píng)估與分析，在原提升荷載和新提升荷載下国产很爽的超薄丝袜脚交网站，井架工作時(shí)平均振動(dòng)頻率都有很大幅度的減小黄色视频在线观看精品。

With the rise in steel derrick base is the top steel headframe supporting steel degree 7.5m, surrounded by four inclined support beams and radiation into space structure.

內(nèi)鋼圈即為隨升井架底座，上面配角鋼井架欧美亚洲综合另类国产情拍图，鋼度為7.5m 81av在线视频，四周用四根斜支撐與輻射梁聯(lián)結(jié)成空間結(jié)構(gòu)。

King-sized lifting sling is the high load component in the procedue of lifting weighing 2 395 kg.

特大型井架起吊索具是井架起吊過(guò)程中高負(fù)荷的構(gòu)件在线视频中文字幕日韩精品一区二区，起吊索具單件重量2 395 kg特别超碰在线，其加工質(zhì)量可直接影響到井架的豎立。

This article elaborated an experimental system for acquiring this coefficient. The dynamic amplificatory coefficient of derricks in use can be acquired through collecting and calculating the signal of this system, so that it can provide the critical data for inspecting the loading capacity of offshore derricks.

主要介紹了一種獲得海洋鉆機(jī)井架動(dòng)力放大系數(shù)的試驗(yàn)系統(tǒng)国内精品视屏，利用該系統(tǒng)采集的信號(hào)亚洲激情综合网，通過(guò)計(jì)算獲得在役井架的動(dòng)力放大系數(shù)，從而為海洋鉆機(jī)井架的承載能力的計(jì)算提供了關(guān)鍵數(shù)據(jù)超碰在线免费观看97。

One of the rig crew members who gets his name from the fact that he works on a platform attached to the derrick or mast, typically 85 ft [26 m] above the rig floor, during trips.

鉆井隊(duì)的成員之一中文字字幕人妻中文，井架工名字的由來(lái)起源于起下鉆時(shí)他工作在與井架或桅式井架連接在一起的一般距離鉆機(jī)平臺(tái)有85英尺高的平臺(tái)上。

On the basis of wide investigation and research on oil derricks, combined with the practical use of oil derricks on the spot, a comprehensive statement is made in this paper about the basic conditions, the structural features and its practical uses of oil derricks on the spot, a comprehensive statement is made in this paper about the basic conditions, the structural features of oil derricks and its practical use.

本文的主要內(nèi)容可以歸納為：(1)国产精品观看在线亚洲人成网、本文在對(duì)石油井架進(jìn)行廣泛調(diào)研的基礎(chǔ)上精品国产第56页，結(jié)合石油井架在現(xiàn)場(chǎng)使用的實(shí)際黃页视频在线观看，對(duì)石油井架的基本情況、石油井架的結(jié)構(gòu)特點(diǎn)以及石油井架在油田生產(chǎn)中使用的實(shí)際進(jìn)行了綜合的論述五十路熟妇高熟无码av种子。提出了有關(guān)石油井架承載能力評(píng)定的理論和實(shí)際的方法亚洲无码高清四级黄色网。

Within definite height limits, such headframes not only take the place of steel headframes with great saving in steel and builting cost, but also eliminates the detrimental effects incidental to foundation settlement, the common defect of other ty-pes of r.c.

這種類型井架在某種高度下不僅可以代替鋼井架工作，使鋼材得到大量節(jié)約97超级碰碰碰久久久久久合集，建筑投資少日韩专区乱伦强奸，而且它也克服了其他類型鋼筋混凝土井架在軟地基上易于產(chǎn)生不均勻沉陷影響的缺點(diǎn)。

But this method tums out of to convincingly reliable due to the effects of local member state of the derrick, on the other hand, the ultimate strength of structures usually tend to remain beyond linear elastic stage according to the geometric and material non-linearity.

目前看黄a大片欧美欧美大片，人們需要對(duì)大量處于服役狀態(tài)的井架結(jié)構(gòu)的安全性重新進(jìn)行評(píng)定国模吧网站，最常見(jiàn)的方法是通過(guò)現(xiàn)場(chǎng)測(cè)試井架應(yīng)力，來(lái)線性外推出井架的承載能力国产特黄特色A级在线视。