| 1. | Underlying soil stratum , strata
下卧层土 |
| 2. | Construction treatment of sand - mixed soil stratum beneath the foundation of high - rise building beside basement garage
对地下车库边高层建筑结构基础下的悬置夹砂土层的施工处理 |
| 3. | Therefore , the structure and feature of different foundation soil strata can be distinguished for different kinds of frequency response of site
而这些频率又是与由地层内的波的重复反射产生的地基固有周期相对应。地脉动的频谱特性能够反映出场地土的构成和特性。 |
| 4. | The agricultural activities change their vertical distributions in the soil profile , and improve the richness and abundance of macro - arthropods in the lower soil stratum especially in july
研究区共捕获大型土壤节肢动物2357只，分别隶属于节肢动物门5纲9目70科。 |
| 5. | The site overburden layer with the structure of different foundation soil strata and different rigidity of soil layer transforms structure of frequency of ground micro - tremor with different degree
土层结构不同、土层刚度（值）不同，覆盖土层对地脉动源频率结构的改造程度也不一。 |
| 6. | However , although soft calyey soil stratum is actually layered with non - linear and rheological propertis , no theory of consolidation is available so far that can take consideration of all these basic properties of soft soils but only one or two of them
然而，虽然非线性、流变、成层性是实际软粘土的最基本特性，现有的各种固结理论仍不能将之同时考虑，而仅能考虑其一或其二。 |
| 7. | The ill uniformity of soil stratum distributing has great effect on the transverse displacement of the soil stratum . underground structures , should have sufficient stretchiness for enduring the displacement of soil stratum , therefore , avoid being cut and destroyed
场地土层分布的不均匀性对土层的横向位移影响很大，地下结构应该具有足够的延性来承受土层的位移，以避免剪切破坏的发生。 |
| 8. | Based on the research works of predecessor , the theory on the displacement of soil strata in deep foundation excavation construction and its application are studied in detail . by analysing the supervision , statistics from , the practical excavation engineering , soil rheology is thought to be the main reason of the displacement heavy of the soft soil and the destruction of the enclosure structure , in deep foundation excavation construction on condition of the high theriomorphic of enclosure structure and good seepage resitting
本文在已有研究成果的基础上，对大面积软土深基坑开挖时土层变位理论及应用进行了探讨：依据现场监测数据，推导出开挖时软土变形的经验公式，分析了软土深基开挖在围护结构刚度大、基坑防渗效果好的条件下，基坑土层变位、围护结构受力破坏发展的主要原因。 |
| 9. | The production of wheat is increased by 9 . 6 % under sewage irrigation ; ( 2 ) . dry matter and leaf area index of the wheat is much higher during nourishment growth stage , while dry matter and leaf area index of the wheat under fresh treatment is significant lower during productive growth stage ; ( 3 ) . heave metal from swage enriched in the soil stratum in the depth of 0 - 30 cm , and the root length under sewage treatment is larger than that under fresh treatment .
田间试验表明，在相同试验条件下，污水灌溉与清水灌溉相比： ( 1 )污水灌溉可使冬小麦增产9 . 6 ； ( 2 )作物地上部干物重和叶面积指数，在营养生长阶段清水灌溉比污水灌溉值高，而在生殖生长阶段清水灌溉比污水灌溉值明显降低； ( 3 )污水中营养物质主要富集在0 30cm土层中，在该土层中污水灌溉的小麦根量比清水灌溉的显著增多。 |
| 10. | The dynamical characteristics of ground soil and structure of frequency spectrum of ground micro - tremor in fuzhou and quanzhou of fujian province are studied in this thesis . the ground microtremor signals were observed , and the signals were analyzed by fast fourier transform method ( fft ) . the characteristics of structure of frequency - spectrum and response of ground soil to frequency of ground micro - tremor are revealed , and the function with frequency - dependence and frequency - selection of micro - tremor for different foundation soil strata is also researched
本文以福建省福州市区和泉州市区场地土的动力特性和地脉动频谱结构为研究对象，对福州市区和泉州市区等地进行了场地地脉动的测试，利用快速傅立叶变换（ fft ）方法对观测到的地脉动信号进行频谱分析，研究了地脉动频谱结构特征及场地土对地脉动的频率响应的特性。 |
