软地层

软地层中声波测井的波形特征

STRATUM Characteristics of Wave Form of Sonic Logging in Soft Formation

疏松软地层中钻大斜度井

Drilling Greatly Deviated Well in Loose and Soft Formation

DSI测井将偶极技术与单极技术相结合，可提供地层纵横波、斯通利波时差，即使在软地层和井眼条件较差等情况下也能测得可靠的横波时差；

DSI log can provide accuracy slowness of compressional wave and shear wave and stoneley wave by combining the dipole and monopole technique . It can still acquire reliable shear wave slowness even in bad hole or soft formation .

软地层中斜拉群锚特性的研究

Study of the Characteristics of Inclined Anchor Group in Soft Clay Ground

特软地层井孔中各模式波的传播特征

Propagation characteristics of mode waves in the borehole with ultra soft formations

软地层裸眼井中弹性波传播的数值研究

Study of Elastic Wave Propagation in Soft Formation

饱和软地层中土锚的时间效应

Time-Effect of Soil Anchors in Submerged Soft Ground

裸眼井中软地层多极子源激发的弹性波的传播

Propagation of elastic waves along a borehole excited by acoustic multipole sources in soft formations

三软地层下分层高档普采面顶板事故规律及其原因分析

Roof Accidents on Advanced-Conventional Working Face in Bottom Slice of " Three Soft " Strata and Their Cause Analysis

在软地层中主要表现为：沿程水力损失很大，水功率利用率极低，导致井底比水功率很低，井底和钻头清洗不良，影响机械钻速。

In soft formations , the main problems are the large hydraulic losses , low hydraulic horsepower , and poor bit cleaning conditions .

通过实验，总结出钻头结构对钻压的波动有很大影响，同样地层条件下，软地层钻头引起的钻压波动比硬地层钻头引起的钻压波动大；

In the same formation condition , the undulation swing of the bit weigh which the soft formation brings is bigger than those the soft formation brings .

在软地层中，可通过调节冲击钻具的性能参数，适当提高转数、冲击频率，同样可提高机械钻速。

In the soft formation , adjusting the performance parameters of percussion tools and increasing rotary speed and percussion frequency properly , then the penetration rate can be increased too .

快速专家辅助计算机自动拾取信息波初至的方法解决了信号弱的软地层信息波的初至拾取问题。

The method for automatically detecting first break of informational wave by fast specialist aided computer solved the problem of detecting first break of informational wave in soft formation having weak signal .

对于均匀细粒含粘土矿物较多的软地层风化形成的不整合来说，在上覆沉积载荷达到一定程度之前，卸荷-风化裂缝系统和底砾岩连通孔隙均是不整合疏导油气的主要通道。

For the uncomformity formed by uniform , fine grained , clay contained and soft formation , discharge-weathered fracture system and communicating pores of the bottom conglomerate are the main transportation channels before the overlapped sedimentation charge reaches a certain amount .

基于软地层测量横波的难题，数值考察了软地层随钻测井多极子波的频散特性及声全波波形，对比分析了电缆和随钻多极子声波测井。

Since it is difficult to measure the shear wave in slow formation , we numerically investigate the dispersion and full waveforms of Logging-While-Drilling ( LWD ) multipole wave in slow formation , and compare the wireline logging with the LWD multipole acoustic logging .

开敞式TBM在铁路长隧道特硬岩、软岩地层的施工技术

Construction technique of open TBM for long railway tunnels in very hard or soft rock strata

软土地层中的圆形隧道载荷模式研究

Study of the loading pattern on circular tunnel in soft ground

软土地层隧道抗震稳定分析

The earthquake resistance stability analysis of tunnels surrounded by soft soil

装配式圆形隧道与软土地层的相对刚度分析

Analysis of relative stiffness between fabricated circular tunnel and soft ground

软土地层土压平衡盾构洞门密封探讨

Talking about earth-pressure-balance shield tunnel hole water-proof sealing in soft stratum

软土地层盾构近距穿越老式建筑区掘进参数分析

Parameters analysis for shield tunneling under old buildings in soft ground

饱和软土地层中管幕法隧道施工方案研究

The study on construction method of pipe-roofing tunel in saturated soft soil

复合式土钉墙在软土地层的应用

Application of Compound Soil Nailed Retaining Wall in Soft Ground

软土地层花管压密注浆的有限元模拟

Finite element simulation on compaction grouting with bored pipe in soft soil

软基地层的高压旋喷防渗

High Pressure Jet Grouting for Seepage Prevention in Soft Soils

软岩地层隧道喷射混凝土衬砌研究

Study on tunnel lining with reactive powder shotcrete in soft rock strata

软土地层中盾构推进数值模拟

Numerical Simulation of the Shield Tunneling in Soft Soil Stratums

软土地层中双圆盾构法隧道的抗震分析

Seismic Analysis of DOT Shield Tunnel Surrounded by Soft Soil

软土地层中盾构隧道地震反应分析

Seismic response analysis of shield tunnel in soft soil

黄河三角洲区为粉土-软土地层结构。

The Yellow River delta is made up of silt and soft soil .