竖向排水

真空预压数值分析中竖向排水通道的讨论

Discussion of Vertical Drainage Channels for Numerical Analysis of Vacuum Preloading

竖向排水体施工具有挤土效应。

The construction of vertical drainage bodies causes compacting effect .

与C型塑料排水板相比，软式透水管作为竖向排水体可加快地基固结压缩，提高地基深层加固效果。

Comparing with C type of plastic drainage board , the flexible permeable hose can speed the consolidation and compression of the foundation and raise the deep reinforcing effect .

真空预压中，砂井和近年来使用得很多的预制竖向排水板PVDs是用来传递真空以及消散孔压的。

Sand drains and more recently prefabricated vertical drains , PVDs are used with vacuum loading to distribute the vacuum and dissipate the pore-water pressure .

本文基于Merchant模型分别推导了自由应变条件和等应变条件下打穿软粘土层的竖向排水井地基粘弹性固结问题解析解，同时考虑了井阻和涂抹作用的影响。

The rigorous solutions are derived for the consolidation problems of soils with drain wells through soft clay layer by use of the Merchant model under both free strain and equal strain conditions and in consideration of the effects of both well resistance and smear action .

变荷载下竖向排水井地基粘弹性固结沉降解析解

Analytical solutions for viscoelastic consolidation by vertical drains under time-dependent loading

竖向排水井地基工后沉降预测

Estimation of post construction settlement of ground with vertical drains

未打穿竖向排水井地基固结理论

Consolidation theory for soft soil with partially penetrated vertical drains

成层竖向排水井地基固结分析

Analysis of consolidation of layered ground with vertical drain

竖向排水井地基粘弹性固结解析理论

Viscoelastic consolidation theories of soils with vertical drain wells

珠江三角洲地区竖向排水体施工扰动初探

Preliminary study on construction disturbance of vertical drainage bodies in the Pearl River Delta

半透水边界的竖向排水井地基粘弹性固结分析

Analysis on viscoelastic consolidation of soil foundations by vertical drain wells considering semi-permeable boundary

新型竖向排水材料-软式透水管的应用研究

A Study of Flexible Permeable Hose as a New Vertical Drainage Material Applied in Ground Treatment

竖向排水体长度对真空联合堆载预压法处理软基效果的影响

Effect of Length of Vertical Drainage Body on Soft Foundation Treated by Vacuum Preloading Combined Surcharge Loading Method

根据所得解编制了计算程序，分析了未打穿竖向排水井地基的固结性状。

Corresponding computer program was developed and the consolidation behavior of soft soil with partially penetrated vertical drains was investigated .

通过设置间距合理的竖向排水体进行治理及现场监测，最终保证了桩基及整个基坑开挖的安全。

With reasonable vertical drainage system and through site monitoring , safe excavation of foundation pit and quality of piles were assured .

一般认为，袋装砂井主要作用在于可形成竖向排水通道，加速软基的固结。

Generally , it is believed that the bagged sand well works as a vertical drain channel which can accelerate the consolidation of soft foundation .

而含竖向排水体地基轴对称固结理论、平面应变固结理论和两种固结情况的等效方法这三部分是完成等效的理论组成部分。

Theories of axisymmetrical consolidation , plain strain consolidation and equivalent plain stain consolidation by vertical drains have become the theoretical parts of the problem .

作为一种非常经济有效的地基处理方法，砂井（包括袋装砂井、塑料排水带等竖向排水体）已被广泛的用于处理软土地基，砂井地基固结理论也得到了很大的发展。

As an efficient and economical method , vertical drains have been widely used to improve soft soil and the related consolidation theories were well developed .

以往较注重竖向排水系统排水能力的研究，而忽略了对水平排水系统排水能力的研究。

The drainage capacity of vitical drains has been paid more attention in the past , but drainage capacity of horizontal drainage system has been overlooked .

相应的，如何将含竖向排水体地基的三维固结等效成平面应变固结成为问题的焦点。竖向排水体施工具有挤土效应。

Then , the key is how to transfer the three-dimensional consolidation to the plain strain consolidation . The construction of vertical drainage bodies causes compacting effect .

为了加速预压的压缩过程，除超载预压外，还设置了水平排水和竖向排水。

In order to speed the silt layer 's compressive process caused by prepressing , besides taking overload prepressing measure , the horizontal and vertical drainages are also arranged .

最后，通过曲线拟合法对深层搅拌桩法、竖向排水体系法处理软土地基后沉降进行了预测，探讨了各种预测方法对软土地基处理方法的适用情况。

At last , we make settlement prediction for deep mixing pile and vertical drainage body by curve-fitting method , and approach the different settlement prediction method for the different processing method 's applicability .

结合未打穿和打穿竖井地基的工后监测数据，论述了竖向排水体长度对真空联合堆载预压处理软土地基效果的影响。

On the basis of the actual observation data on settlements after construction , the effect of the length of vertical drainage body on soft foundation treated by vacuum preloading combined surcharge loading method is explained .

在路基填筑期间，淤泥地基与竖向排水体之间的孔压差增大，加速土体固结。

The dissipation value of pore water pressure does not change along the depth . The pore water pressure difference between silt and PVDs increases and the soil consolidation velocity is accelerated during the embankment construction .

塑料排水板由于自身造价低、施工方便等特点已经取代了传统砂井或袋装砂井，是近年来真空预压试验最常用的一种竖向排水体。

Plastic drainage board has replace the traditional bag sand-well because of the lower cost and convenient construction . Plastic drainage board is the most common vertical drainage system of vacuum preloading tests in recent years .

通过实测沉降资料与近似理论曲线的拟合，获得竖向排水井地基的最终沉降量和平均固结度，从而预估其工后沉降量。

The least squares optimization method is used to best fit the theory settlement curve with the measured settlements and to determine total primary settlement and average consolidation degree , consequently post construction settlement can be estimated .

同时，以此解为基准，对现有未打穿竖向排水井地基平均固结度近似计算公式和方法进行了较为详细的比较，得出了现有近似计算公式及方法适用的范围。

On the basis of this solution , the approximate methods so far available for computing average consolidation degree of soft soil with partially penetrated vertical drains were compared in detail , and their applicable conditions were obtained .

它可以在软土层中形成竖向排水通道，加速孔隙水的排出和地基固结，减少工后沉降，提高地基土的承载力。

Driving the plastic drainage board could form the vertical drainage channel , accelerate the vent Of hole water and the concretion of clay , reduce the sedimentation after construction , enhance the load-bearing ability of the foundation .

计算表明扰动区半径可取塑性区半径的1.2倍，扰动区半径约为竖向排水体导管半径的9倍。

Theoretical analysis shows that the radius of construction disturbance zone in the soft clay ground is about 1.2 times of that of the plastic zone and 9 times of that of the guide tube of vertical drainage bodies .