天然地基

本文结合海南东环客运专线的建设，对天然地基和CFG桩加固地基断面沉降计算中遇到的一系列的问题进行了研究。

This paper , combined with the construction of Hainan East circle passenger dedicated line , studys on a series of problem of the settlement calculation of natural ground and CFG pile composition .

CFG桩网复合地基处理深厚层软土地基，与传统的CFG桩复合地基相比，具有对天然地基进行双向加强的特性，这使得其变形及沉降分析更为复杂。

To deal with the deep layers of soft clay ground , comparing with traditional composite foundation of CFG piles , the CFG pile-net composite foundation can strengthen the natural ground from two directions : vertically and horizontally , which makes more complex to analyze its deformation and sedimentation .

本文使用这种方法和双曲线法对天然地基断面和CFG桩复合地基断面的计算结果进行了比较，结果表明两种预测方法结果相近。

The method and the hyperbolic method are used in foreseeing the relationship of natural and CFG pile section . The results of two methods are approach .

山东某电厂2×600MW工程天然地基的勘测与评价

Investigation and Evaluation of Natural Foundation for a 2 × 600MW Power Plant in Shandong

针对目前天然地基、CFG桩复合地基变形计算中，存在压缩模量取值不当的问题，提出对固结试验结果进行拟合分析。

According to problem of selecting the incorrect compression modulus to calculate the deformation of natural foundation and CFG piles composite ground in currently , simulating the consolidation test results is put forward .

天然地基土承载力较高，但基础影响深度范围内存在软弱下卧层，不能满足设计要求的承载力和变形时，采用CFG桩法对软弱下卧层进行加固处理。

When natural soil , higher bearing capacity and soft substratum in influence depth , cannot satisfy the request of bearing capacity and deformation , CFG piles are adopted to strengthen soft substratum .

不同于天然地基的是，CFG桩的桩顶应力在静置期也缓慢增加，说明桩间土荷载通过土拱作用逐渐转移到桩顶。

Different from natural foundation , the stress on the top of pile may increase slowly when standing , which can explain the load transfer from soil among piles to pile top through soil arching . 3 .

CFG桩复合地基是一种经济、可靠的地基处理技术，该技术比天然地基能更好的提高地基承载力、更易控制地基变形，故在我国得到迅速的发展与广泛的应用。

CFG pile composite foundation is an economic and reliable foundation treatment technology . The composite ground has been widely used in engineering because it can enhance bearing capacity and control distortion of natural ground with relatively little cost .

复合桩基是桩基，属于基础范畴。CFG桩复合地基中单桩承载力大于自由单桩承载力，复合地基桩间土承载力一般情况下大于天然地基承载力。

The bearing capacity of one single pile in a CFG pile composite foudation is higher than that of a free single pile , and the bearing capacity of soil surrounding the CFG piles is commonly higher than that of natural soil .

数值模拟结果显示载荷板尺寸（即基础尺寸）增大时，桩身轴向应力、桩土应力比、沉降都增大，说明CFG桩复合地基与天然地基有着相似的工程特性。

The results of numerical simulation show that as load plate size ( base size ) increases , vertical stress , pile-soil stress ratio and the settlement had increased , indicate that composite foundation with CFG piles have the same engineering properties with the natural foundation .

地基承载力由天然地基的70kPa提高到380kPa，能满足拟建结构物对地基承载力和变形的要求。

The bearing capacity of the foundation is raised from 70 kPa for natural foundation to 380 kPa , which can meet the demands of bearing capacity and deformation of the planned structure .

天然地基上浅基础可靠性设计理论研究

Research on Shallow Foundation Reliability Design Theory on nature foundation soils

软弱下卧层上部天然地基基础底面积的简便计算方法

The Reduced Calculation Method of the Foundation Area above Soft Sub-base

天然地基上大跨度拱形结构抗推压基础设计

Design of Foundation of Long Span Arch Structure on Natural Subgrade

天然地基的现场检验及隐患处理

Check of Foundation Subsoil and Hidden Danger Treatment of the Natural Ground

天然地基筏形基础工程应用的分析与研究

Analysis and Research on Engineering Application of Raft Foundation on Natural Ground

天然地基结构物设计与计算方法探讨

Investigation & Discussion of Natural-foundation Structure Design and Calculation Method

天然地基承载力设计值的探讨

Discussion for the Design Value of Natural Subgrade Bearing Capacity

对天然地基承载力计算公式的理解和应用

Understanding and Application on Calculation Formulas for Bearing Capacity of Natural Foundation

天然地基土在基坑开挖侧向卸荷过程中的模量计算

Modulus formula for foundation soil under lateral unloading during excavation

软土层上硬壳层作为工业球罐天然地基的利用

On Using Hard Surface on Flexible Layer as Natural Foundation of Industry

天然地基与桩端持力层承载力差异的探讨

Discussion on Bearing Capacity Difference of Natural Foundation and Pile Tip Resistence

天然地基浅基础的震害分析

The Seismic Damage Analysis of Shallow Foundation on Natural Subsoils

复合地基与天然地基在地震作用下附加沉降的数值分析

Numerical analysis of settlement of composite foundation and natural foundation under earthquake action

天然地基上矩形平面高炉基础计算分析

A Calculating Analysis on Rectangular Plate Foundation of Blast Furnace on the Ground

一般景观美化为压实天然地基。

General landscaping is to be compacted natural ground .

高层建筑采用天然地基的探索

Study on the Natural Foundation Design for High-Rise Buildings

高层建筑天然地基基础形式的运用

Application of the natural base foundations of highrise buildings

深圳市某32层高层建筑采用天然地基的探讨

Discussion on A Building of 32 Layers Based on Natural Ground in Shenzhen

同时，天然地基有成层性的特点。

Another important character of natural subsoil is layer .