土体

2Combined with dense-constructed area of Shiqiaotou tunnel, a series of factors that lead to ground deformation and affect the stability of ground buildings are systematically analyzed.These factors include overbreak in shallow tunnel, reserved deformation and soil squeezing.By calculation and analysis of ground deformation of other sections,a division of settlement controling grade is made.

2以石桥头隧道地表变形重点控制地段为例，对浅埋隧道超挖、预留变形量、掌子面土体挤出等地层损失诱发的地表变形及其对地面建筑稳定性的影响进行了系统地计算和分析；通过地表变形的计算分析，对隧道不同地段的地表变形控制等级进行了划分。

Secondly, the methods of obtaining the distribution function of phreatic line and the seepage parameters were introduced on the basis of the research results of the formers.

在前人研究成果的基础上，总结坡前水位动态变化的成层土体浸润线的求解方法，并详细介绍非饱和非稳定渗流参数的确定方法。

Gradient distribution of soil n, p, and k along the distance from picea mongolica seedlings root surface .

沙地云杉幼苗根表土体中 n 、 p 、 k 的梯度分布。

It is assumed that volume of a soil mass not change if the effective stress is less than the preconsolidation stress, and the relation between the effective stress and the pore water pressure, the settlement and the preconsolidation stress was established.

1.3。在假定当土中有效应力小于先期固结应力时土体不产生排水固结变形的前提下，建立了有效应力与超静水压力、地基沉降以及先期固结应力之间的关系式。

Applying soil's nonlinear stress-stran relationships (the skelton curve adopts Hadin's hyperbola model and the loaded/unloaded curve adopts the Masing's law revised by Pyke), and taking the viscous boundary as flank artificial boundary, 2D dynamic analysis of the foundation is programed by FEM. It contains an automatic dividing-element subroutine. It could be employed to calculate the horizontal and vertical seismic responses of the soil and foundation.

本文按照土体的非线性应力—应变模式，即将Hadin的双曲线模式作为骨架曲线，加卸荷采用Pyke等修正的广义Masing二倍法则，采用粘性边界作为侧面人工边界，用八结点等参数有限元法在微机上编写了二维地基的动力分析程序，该程序含有网络自动剖分模块，能较好地模似地基和基础在水平方向和竖向的地震反应。

Therefore, to study the reconsolidation of disturbed soil and its influence on metro tunnel is very useful for controlling the disturbance of construction and the deformation of metro tunnel.

因此，研究扰动土体再固结及其对地铁隧道的影响，对于控制地下工程施工扰动和地铁隧道变形是很有用的。

For the tunnel built in soft soil, it would deform along with the reconsolidation of disturbed soil, and the structure of tunnel and the operation of metro would be endangered.

对于软土地区的地铁隧道来说，下卧扰动土体的再固结使隧道随之产生变形，从而危及隧道结构和地铁运营的安全。

The ecological processes of soil salination of alkaline minera lized water were discussed in this paper.

本文探讨了田间低矿化水灌溉的土壤盐碱化生态过程，结果表明：无论在水平方向还是垂直方向上，随着灌溉水矿化度的增加，带入土体中的NaHCO3增多，从而引起土壤pH，全盐，HCO3－，ESP及SAR逐渐升高。

A part of the volume of siol air is easily surrounded by water flow and entrapped in the pores of soil in the infiltration progress.

非饱和土体中的部分气体极容易在入渗过程中被封闭在孔隙或裂隙中，形成互不连通的与外界隔绝的封闭气泡。

However, there are many problems in the experiment and use of subterrene drills , such as the material of outer subterrene drills and heating resistant element , reasonable design of inner structure of the subterrene drills, etc.

但在岩土体的使用中还存在许多问题，如热熔器外壳及加热电阻元件的选材，热熔器内部结构的合理设计等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐