水平地层

The Paleozoic tectonic stress field was reconstructed with the vertical stylolite structure found in the Ordovician and Carboniferous limestone. The identification of Paleozoic tectonic stress field showed that North China craton suffered the horizontal compression in the NNE-SSW direction and uplifted at the beginning of the Ordovician.

摘要利用奥陶系和石炭系灰岩地层中的垂直缝合线构造，对济阳坳陷古生代古构造应力场进行的判别结果表明，自奥陶纪开始华北克拉通盆地就受到NNE—SSW向的水平挤压而整体抬升，在遭受长达140Ma的剥蚀作用后，即至晚古生代古构造应力场仍未发生改变。

Affected by the backfilling, the tangential stress of shotcrete has a tendency is for pressure stress to be tensile stress; it is dangerous to induce the axial cranny.

对照现场实际，在近水平煤系地层中修建隧道，如有厚层硬岩层控制，只要对局部软岩层加强支护控制，是可以保证围岩的整体稳定的。

But in practical application, the results of calculation usually have a greater difference from reality, which are mainly the following several points: it is thought that single-phase to flow for fluid in the formula, and multiphase flow exists actually; also the impact of the pressure drop in horizontal section and the wellhole completion forms on the deliverability are not included, as well as the bottom water coning is a complex question affecting well deliverability.

但在实际应用中，计算结果与实际往往存在较大的差别，其原因是：公式推导中假设流体流动是单相流动，而实际地层往往是油水两相流动；公式中没有考虑水平井筒内压降的影响；不同的完井方式所对应的表皮系数不同，对产能影响也较大。

In operation, the downhole devices will be laid down with tubings which will move up and down using the operation machine. Since the injection head can rotate in the determined speed, the rotating flow, compared with the conventional stable axial flow, can prevent the sands from depositing in the horizontal annular and washing the screen. The jet from high-efficiency jet nozzle will wash the screen directly with concentrated hydro-power. The working fluid can be clean water, without damage to the formation.

作业时用油管下入该井下装置，利用作业机带动油管上下移动，由于喷头可按照既定速度旋转，返回流体在水平段由常规的平稳轴向流动变为旋转流动，既可实现对防砂管的全方位解堵，又能避免砂粒沉积；高效喷嘴产生的射流直接对着防砂管冲击，能量集中；工作介质为清水，不会对地层带来二次污染。

In operation, the downhole devices will be laid down with tubings which will move up and down using the operation machine. Since the injection head can rotate in the determined speed, the rotating flow, compared with the conventional stable axial flow, can prevent the sands from depositing in the horizontal annular and washing the screen. The jet form high-efficiency jet nozzle will wash the screen directly with concentrated hydro-power. The working fluid can be clean water, without damage to the formation.

作业时用油管下入该井下装置，利用作业机带动油管上下移动，由于喷头可按照既定速度旋转，返回流体在水平段由常规的平稳轴向流动变为旋转流动，既可实现对防砂管的全方位解堵，又能避免砂粒沉积；高效喷嘴产生的射流直接对着防砂管冲击，能量集中；工作介质为清水，不会对地层带来二次污染。

By the variety of the air temperature, air pressure, the wind velocity direction of wind...etc. similar from the strong aerodynamics angle in the valley breeze, formation and daytime contrary thermodynamic energy circulation, full elucidation oasis and the sky of the deserts really exist the level air pressure , then cause the vicinity district layer circulation produce, deliver the calories to the oasis to cause improving temperature effect the desert.

从大气动力学角度看气温、气压、风速风向等的变化类似于山谷风，形成与白天相反的热力环流，充分说明绿洲和沙漠上空确实存在着水平气压差，进而导致近地层环流产生，把热量传送到绿洲引起沙漠增温效应。

To discuss the feasibility of applying this technique into the practice of engineering, this paper references the real project of the running tunnel from Great Showplace to Scientific House in Shenzhen Metro, uses the geotechnical centrifuge of Southwest Jiaotong University, then researches the settlement of the ground and the influence on the pipeline underground in stratum with abundant water by the technique of undraining spin-spay pile, at last draws a conclusion about the principle of the ground settlement with the construction method of excavating soil rich in water without dewatering at Shenzhen Metro.

为了探讨离心模型试验技术这一研究手段在地下工程中应用的可行性，结合地质、水文、结构较为复杂的深圳地铁大～科区间暗挖施工SK3+355断面的具体实例，应用我校新近建成的100gt土工离心试验机，采用离心模型试验技术对在富水地层应用水平旋喷桩工艺进行控制降水施工对地表沉降变形及地下管线的影响进行了研究。

According to Snell law and Zoeppritz equation,the paper studies the rule of energy's distribution of elastic wave on the interface,obtain the rule of received energy variation with offset or angle,and also study the relation of the exploding freq...

根据Snell定理和Zoeppritz方程，通过水平层模型的正演模拟，研究了地震波在地层分界面上的能量与方位角关系，发现了地震反射波的能量在超临界角突然增强的变化规律。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失