砂砾层

Sand gravel cushion is a kind of ground cushion treatment, it is widely applied because of its low cost.

砂砾石垫层是换填垫层法的一种，由于其比较经济，因此在实际工程中的应用比较广泛。

Lithology of Tertiary oil bearing reservoir in Taibei Sag is mainly fine sandstone and petrological types are mainly lithic arkose and hybrid sandstone.

台北凹陷第三系含油储层岩性以细砂岩为主，岩石学类型以岩屑长石砂岩和混合砂岩为主，含气储层岩性以砂砾岩为主，岩石学类型为岩屑砂砾岩。

Meso-experiment of fine sandstone thermal crack laws;2. Lithology of Tertiary oil bearing reservoir in Taibei Sag is mainly fine sandstone and petrological types are mainly lithic arkose and hybrid sandstone.

台北凹陷第三系含油储层岩性以细砂岩为主，岩石学类型以岩屑长石砂岩和混合砂岩为主，含气储层岩性以砂砾岩为主，岩石学类型为岩屑砂砾岩。

But normal pre-stack migration imaging method could not meet the need of exploration in great fault with big obliquity and strong anisotropism glutenite body.Pre-stock time migration processing technology could be applied in studying on pre-stack migration pre-processing technology, establishing final velocity model and electing key parameters.

采用叠前时间偏移处理技术，开展针对性的叠前预处理技术、精细的速度模型建立和关键参数的合理选取等研究，三维叠前时间偏移处理较常规三维叠后时间偏移处理获得了较高质量的成像剖面，且输出的道集可以用于砂砾岩体储层描述研究。

But the strata with high ground water level are composed of alluvium clays、 silty clay、 gravels and crushed stone soils in Chengdu;And the shield will drive in the interzone with complicated geologic environment, especially in the strata contained more than 50 percent of grav

而成都地铁工程将主要穿越由冲积粘性土、粉土、砂砾和碎石类土组成的覆盖层，地下水位高，盾构将通过大量地质条件和环境条件均极为复杂的区间，特别是地层中还夹杂有大漂石、胶结砾石层、粉细砂透镜体，隧道围岩中直径大于5cm的砾石含量一般都在50%以上，最大的漂石直径达1m左右，且地面多为建筑物密集的繁华地区，施工难度大，国内尚无先例，在国外也无完全成熟的经验。

This conglomeratic sand body has the characteristics of medium-high permeability, medium-high porosity, fairly serious heterogeneity and sensitivity. The lateral strong heterogeneity is in the northern part and the vertical one is in the upper part.

该砂砾岩体虽具有中高孔、中高渗储集层特点，但存在较严重的非均质性和敏感性问题，平面以北部非均质性最强，纵向以上部非均质性更严重。

But the strata with high ground water level are composed of alluvium clays、 silty clay、 gravels and crushed stone soils in Chengdu;And the shield will drive in the interzone with complicated geologic environment, especially in the strata contained more than 50 percent of gravels which diameter is greater than 5cm, also contained big grain size gravels(the maximum diameter is about 1m)、 cement gravels and silty sand with lentoid mass;And on the ground there have many serried buildings in the prosperous zone.

而成都地铁工程将主要穿越由冲积粘性土、粉土、砂砾和碎石类土组成的覆盖层，地下水位高，盾构将通过大量地质条件和环境条件均极为复杂的区间，特别是地层中还夹杂有大漂石、胶结砾石层、粉细砂透镜体，隧道围岩中直径大于5cm的砾石含量一般都在50%以上，最大的漂石直径达1m左右，且地面多为建筑物密集的繁华地区，施工难度大，国内尚无先例，在国外也无完全成熟的经验。

On the basis of the behavior of three CFRDs in China and Campos Novos CFRD in Brazil, the authors put forward three questions to need to be solved now on seepage control: first,segregation between face slab and bedding layer;second, the optimization design of material of bedding layer;third, the drainage design problemes of the CFRD.

根据国内3座坝和巴西的坎泼斯诺沃斯及其他几座坝的运行性状，从渗流控制的角度提出了高面板堆石坝当前需要研究的面板与垫层的脱开问题、垫层料的优化设计问题以及砂砾石面板坝的排水设计问题，并提出了相应的研究途径。

The brief target oil and gas zone are from 2300 to 2500 meters .

主要目的油气层在2300到2500米，其地层岩性为：砂岩、砂砾岩和泥岩互层。

A model for logging interpretation of glutenite reservoirs with large differences between lithology and physical property was not simply based on the criterion of siltstone reservoirs with similar lithology and physical property to be used.

对于岩性、物性差异较大的砂砾岩储层，测井解释模型的建立不能套用岩性物性相近的较为简单的砂泥岩储层标准。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。