TSP203plus在岩溶隧道超前地质预报中的应用研究

岩溶地区隧道施工开挖过程中,常遇到溶洞、暗河、塌方、涌水等不良地质情况,为确保岩溶隧道施工安全,需对其进行超前地质预报.基于TSP203plus多次对贵州省在建高速公路某岩溶隧道的超前预报,结合勘察资料及现场实际溶洞揭露情况,总结出TSP系统在岩溶隧道的判识规律,并验证了其可行性.     

云桂铁路营盘山隧道溶洞综合勘察与评价

云桂铁路营盘山隧道工程地质条件复杂，施工期间在DK396+635揭示一大型溶洞.通过采用地质调查测绘、钻探、物探、综合分析等手段综合勘察，查明了溶洞的特征、性质及水文地质条件.该溶洞规模大，性质复杂，对隧道工程影响大.采取了回填、注浆加固、排水的综合处理措施，经运营检验，效果良好.研究印证了岩溶地区铁路选线的基本思路和工作方法，反映出超前地质预报工作在岩溶隧道施工中的重要作用.     

岩溶隧道地质超前预报及整治施工

主要对岩溶地区一座隧道的超前地质工作预报方法、揭示的溶洞情况和溶洞的治理措施做了分析，指出岩溶地区隧道地质超前预测预报工作要视具体情况采用综合的预测预报方法。     

隐伏溶洞影响下隧道开挖稳定性数值模拟

隐伏溶洞是引起隧道围岩失稳甚至塌方的常见不良地质之一,为分析其对隧道开挖稳定性的影响,采用FLAC3D有限差分法和现场监测手段,探讨了隐伏溶洞尺寸、溶洞与隧道净距及溶洞位置对隧道开挖过程中围岩应力场、应变场及隧道变形的影响规律。研究表明：①围岩最大剪应力与最大剪应变增量均随溶洞尺寸增大而增大（随净距增大而减小）,塑性区集中于隧道-溶洞中间岩柱;②隧道变形时程曲线呈“S”形,隧道变形随溶洞尺寸增大而增大（随净距增大而减小）;③当溶洞直径大于0.6倍隧道宽度,且与隧道净距小于0.6倍隧道宽度时,隐伏溶洞对围岩塑性区和隧道变形具有明显影响,且隧道侧部溶洞对隧道稳定性最为不利;④建议岩溶隧道工程采用动态化设计、施工及监测,并采用综合超前地质预报探明实时地质情况。     

地质雷达在贵州岩溶隧道超前地质预报中的应用

以贵州省某高速公路岩溶隧道超前地质预报应用为实例,介绍了地质雷达在岩溶隧道超前地质预报的方法,通过雷达软件数据处理,预报前方溶洞的大小和规模,降低隧道施工风险,确保隧道顺利掘进和正常施工.     

埋深对岩溶隧道地震动力响应影响分析

基于工程波动理论,应用ABAQUS数值模拟和理论解析方法,研究了溶洞中心与隧道中心处于同一水平时,埋深对岩溶隧道地震动力响应影响规律,并对比分析地震作用下有无溶洞时隧道的反应差异性.分析结果表明:岩溶隧道和非岩溶隧道发生较大位移的部位均为拱肩和拱脚;溶洞对隧道地震动有缓冲作用;岩溶隧道埋深越浅,地震动力响应位移越大;在地震作用下,隧道二次衬砌第一主应力较集中的部位是拱脚.埋深15 m时第一主应力最大,埋深100 m时第一主应力最小;埋深100 m时,岩溶隧道比非岩溶隧道的第一主应力小,说明溶洞对隧道岩体有一定的应力释放作用.     

岩溶区公路隧道施工围岩分级指标体系研究

岩溶在我国分布广泛,公路隧道勘察设计阶段的围岩分级准确度往往不能满足施工要求;而这点在岩溶区公路隧道表现尤为突出.为解决这个问题,通过对国内外常用围岩分级方法的指标和公路隧道施工现场常用围岩分级指标的统计分析,获得岩溶围岩分级共性指标;通过对南方岩溶区域地质特征分析,提出岩溶围岩分级特殊性指标,最终获得以岩溶围岩分级共性指标和特殊性指标(岩溶发育对隧道影响程度——与岩溶发育程度、水、溶洞充填物、溶洞规模及分布方位有关)为基础的岩溶围岩分级指标体系,然后利用规范定性定量法和打分制法获取各围岩分级指标参数.并在此基础上,利用围岩分级指标缩减试验验证南方岩溶围岩分级指标体系的可靠性和合理性,并将其应用于天生桥隧道和关上二号隧道进行围岩分级,准确率达93.3％.     

探地雷达岩溶高风险隧道中的应用

地质雷达是一种广泛用于地质探测的高频电磁脉冲波技术。针对某高速公路建设中岩溶隧道实际工程,阐述了在高风险岩溶隧道中地质雷达在探测不良地质体时的应用,分析了对裂隙、溶洞、富水体等不良地质体的典型雷达信号特征,有效保证了隧道安全,对类似条件下的隧道施工有一定指导意义。     

岩溶隧道洞中桥设计与铺架

通过田德线百布隧道洞中桥设计、施工及铺架,结合岩溶地质发育形态,总结了岩溶发育区桥梁基础地质勘探、溶洞顶板安全厚度计算、桩基设计及施工铺架等应注意的问题,确保隧道建设及运营的安全。并对今后岩溶地区隧道内桩基的设计与施工提供了经验。     

侧部溶洞对隧道围岩变形特征影响的数值分析及处治措施

以五里坡隧道岩溶工程地质特征及隧道结构加强措施为例,运用有限元数值分析基本理论,分析了既有侧部溶洞对隧道围岩变形特征的影响,辨识应力集中影响范围,并讨论了既有溶洞洞体形状对溶洞围岩应力状态的影响,同时进行了隧道围岩加固的施工技术探讨。由于岩溶地区工程地质条件的及其复杂性,施工开始前应详细查明地质情况并根据围岩地质条件有针对性地制定相应的施工措施和几套施工应急预案,以便遇到突发事件时能及时投入抢险工作;同时技术人员在施工中做到动态设计和动态施工,可有效地将施工安全风险和隧道结构安全风险降到最低。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-