From the aeolotropy of hard rock of tunnel engineering region, the stress distribution of several kinds of fault to the water gushing of tunnel, the type of geology disaster involved in macrocharacter, main control factors, disaster mechanism and control strategy in tunnel excavating are studied systematically in this thesis. The purpose is to establish a theory and technology method for forecast and decrease disaster in tunnel excavating.

本文以硬巖隧道開(kāi)挖工程區(qū)域巖體的各向異性研究為起點(diǎn)黄色a级片免费网站，從不同類型斷層為主要構(gòu)造形跡的應(yīng)力分布特征出發(fā)，并結(jié)合隧道地下涌水災(zāi)害，系統(tǒng)研究隧道開(kāi)挖的地質(zhì)災(zāi)害類型，以宏觀表象日韩精品天天在线观看视频免费网站、主控因素、災(zāi)害機(jī)制及防治對(duì)策為主要研究?jī)?nèi)容史上最婬荡野视频高潮，全面深入研究旨在為隧道開(kāi)挖期間防災(zāi)无码av免费一区二区三区、減災(zāi)提供理論基礎(chǔ)與技術(shù)路線。

Various ventilation methods are discussed and the necessity to use feed-forwards traffic forecast ventilation control is put forward. Autoregressive Moving Average process is implemented to forecast traffic volume. Fuzzy intelligent control strategy is developed to address the problem that tradition control methods could hardly response to cross-river tunnel contaminant in time.

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Took Chongqing Gong-he tunnel as an engineering example and studied the failure mechanism of surrounding rock and the correlation with bolt support system by using the methods of theoretical analysis, modeling test, numerical simulation and in situ test, some helpful conclusions were arrived as follows.Firstly, a new failure criterion for transversely isotropic rock mass was proposed with consideration of bedding plane orientation and major principal stress, and the corresponding algorithm, arrived through VC++6.0, can be easily embedded into the software FLAC3D for the geotechnical calculation.

論文在國(guó)家自然科學(xué)基金專項(xiàng)基金創(chuàng)新群體基金項(xiàng)目(No.50621403)以及國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目"隧道與地下空間工程結(jié)構(gòu)物的穩(wěn)定性與可靠性(No.50334060)"的資助下，以共和隧道為示范工程久久久国产99精品一国产，運(yùn)用理論分析99尤物无码国产福利在线观看、物理模型實(shí)驗(yàn)、數(shù)值模擬和現(xiàn)場(chǎng)測(cè)試等手段无码视频A片免费看无，對(duì)共和隧道大埋深段層狀巖體的圍巖變形破壞機(jī)理殴美aaaav、錨桿支護(hù)力學(xué)效應(yīng)及圍巖-支護(hù)結(jié)構(gòu)的變形特征等內(nèi)容進(jìn)行了研究，其主要研究成果有：①在總結(jié)和探討國(guó)內(nèi)外學(xué)者提出的層狀巖體經(jīng)驗(yàn)型連續(xù)介質(zhì)破壞準(zhǔn)則基礎(chǔ)上天堂网综合网，結(jié)合層狀巖體力學(xué)特性114毛片，考慮層面方向和最大主應(yīng)力方向兩個(gè)影響因素，提出了共和隧道層狀巖體橫觀各向同性破壞準(zhǔn)則日韩免费午夜毛片视频在线播放；采用匯編語(yǔ)言VC++6.0實(shí)現(xiàn)了橫觀各向同性彈塑性本構(gòu)關(guān)系的算法欧美视频大全，并嵌入FLAC3D有限差分?jǐn)?shù)值分析軟件接口中實(shí)現(xiàn)數(shù)值運(yùn)算。

The rectangle shaped member mentioned by this article is a prefabricated one for the internal construction of circular tunnel, and is located along tunnel axis line, to be lifted into place by a dedicated crane onboard the shield machine in synchronised manner, followed by placement at both sides of tunnel, of ballast block, or in-situ cast members, corbel, pavement slab and the like.

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Early start for the tunnel, decoration and equipment installation work plan in early March to open the tunnel structure; Dalian Road Tunnel builders are being intensified Eastern wells internal structure of the construction work, and Jiang contact corridors drilling works to ensure completion of the opening on October 1 this year; and extremely rare in the world of the double-barrel double-Hing Road Tunnel builders are conflicting for the Northern Line on February 8 out of its hole for active preparations, the project will be completed by the end of 2004 all opened.

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The results of numerically inverse Laplace transform are used to analyze the influences of boundary condition of tunnel and transversely isotropic property of soil on the stress,displacement and pore pressure.

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The observation results reveal the difference between surrounding rock pressures of shallow tunnel calculated by exiting methods and test results is large, pressure figure seems cat ear, surrounding rock pressure of deep tunnel belongs to clastic pressure, the test result is consistent with result by modified KAKE formula, the invert stress properties of shallow tunnel and deep tunnel are different, the axial force of lattice girder is at pressure in majority, and the stress of second lining is relatively small in loess highway tunnel.

實(shí)測(cè)結(jié)果表明：現(xiàn)有淺埋隧道圍巖壓力公式計(jì)算結(jié)果與實(shí)測(cè)結(jié)果偏差較大国产乱伦合集，其分布呈"貓耳朵"形狀；深埋隧道圍巖壓力屬形變壓力九九免费视频网站，其實(shí)測(cè)值與修正卡柯公式計(jì)算結(jié)果較為一致国产怕怕；深埋與淺埋隧道中仰拱的受力性態(tài)有所不同；格柵拱鋼筋軸力以受壓為主片毛视频在线观看网站；黃土公路隧道二次襯砌受力相對(duì)較小欧美特黄A级高清免费大片A片l。

In this paper the stress analysis solution of parallel circular tunnels in elastic ground under any coefficient of lateral pressure is derived, and the stress field and displacement field of parallel circular opening subjected to continuous boundary stresses are first solved, and then the ground pressure and the internal force in lining are obtained, using the displacement compatibility equation between linin...

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Authors gave the minimum rock covering thickness with comprehensive consideration of stability of surrounding rock and tunnel seepage volume.A...

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The key of maintaining the tunnel stability lies on how to deal with the advance core soil ahead of working face, which is obtained on basis of analysis on the problems in high speed railway tunnels with big crosssections in soft surrounding rock or soil. Fullface prereinforcing method by fiberglass bolts can enhance the equivalent rigidity of the advance core soil and control the deformation of the advance core soil, so that arch effect can play its role naturally and assure the excavation safety.

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