地层

The Highway tunnel with small spacing entrance to cave a term of stratum thinner, belonging to strong effloresce band, wall rock generally more broken, and usually clipping soil layer, for this kind of disadvantage condition in soil arch, how reasonable exploitation every kind of construction method, while insuring the safe premise, lower the engineering cost, increasing work efficiency.

高速公路小净距隧道洞口段的地层较薄，多属于强风化带，围岩一般比较破碎，而且通常夹有土层，那么对于这种不利于土体成拱的条件下，怎样合理利用好各种施工方法，提高工作效率，同时对岩层的破坏机理研究，各种施工方法对围岩影响的研究，这些工作是目前急需解决的问题。

The shape of these layers is irregular but essentially ellipsoidal.

这些地层的形状并不规则，虽然近似地接近一个椭球。

Stratum near the bridge foundation is rhyolite porphyry in late Jurassic period. A little of slope eluvium exists on the top of the mountain, which is 200 m long and 80 m wide, and its all sides face to sea. The integrality of rock mass of the mountain is relatively poor because of the effect of some faults and other structural fissures.

桥基所在地层为晚侏罗系流纹斑岩，山体顶部有少量坡残积层，地形上该山体平均长200m、宽80m，四面临空，且受数条小断层及共他构造裂隙的影响，山体岩体完整性较差。

Based on the high-resolution sequence stratigraphy and subsidence analyses of 73 wells in the Beryl Embayment, Viking Graben, North Sea , this paper tries to describe the sedimentation and subsidence models of the Middle-Late Jurassic syn-rift phase, andto determine the timing and location of boundary fault linkage and variation of active extension directions, and their control onsedimentation and .

根据北海维京地堑Beryl淘73口井的高分辨率层序地层学分析和高分辨率沉降分析，阐明中、晚侏罗世沉积和沉降模式，确定应力场的变化及边界断层的连锁对沉积和含油气系统的控制作用。

Surfactant/polymer flooding become a new flooding means, which can furthest exert viscoelasticity of polymer, decrease effect of emulsion and make a clean sweep of encrustation of stratum and mineshaft due to being alkali. In this paper several dozen kinds of surfactants were screened for the polymer/surfactant system.

表面活性剂／聚合物二元复合驱作为一种新的驱油方法，可以最大限度地发挥聚合物的粘弹性，减少乳状液带来的不利影响，彻底清除由于碱的存在引起的地层及井筒结垢现象。

According to the principle of sequence stratigraphy , Pinghu formation of Eocene can be divided into four sequences.

根据层序地层学原理，西湖凹陷保俶斜坡始新统平湖组可划分为四个层序。

However, there are not only a lot of sporo-pollen assemblages from Eocene to Oligocene but also much more ichthyolite from Oligocene to Miocene.

然而，这套地层中存在大量始新世－渐新世的孢粉组合，同时赋存有相当数量的时代为渐新世－中新世的鱼化石。

Mudstone undercompaction phenomenon is one of the important characters of Eocene strata in the Dongtai depression of the Subei basin.

泥岩欠压实现象是苏北地区，特别是苏北盆地东台坳陷下第三系地层中重要的地质特征之一。

So, the timing of terrestrial strata can be defined from Eocene to Oligocene in Paleogene.

因此，尼玛盆地的陆相地层时代应为古近纪始新世－渐新世。

Therefore, borehole wall stability is systematically studied by applying multidiscipline, such as improving the basic theory of drilling geomechanics, precisely processing seismic profile, testing palaeomagnetic stress with core, computer simulation of equipotential surface of formation stress, and predicting stable period by core soaking.

为此，开展了系统研究工程，进行多学科、多角度的钻井井壁稳定性研究，即改进钻井地质力学的基本理论研究、精细化处理地震剖面图、岩心的古地磁应力测试、地层应力等势面的计算机模拟，井下岩心浸泡进行稳定周期预测等。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。