弱风化

在施工中，应给予合理地开挖和处理，要充分利用弱风化岩体。

Inconstruction dam foundation excavation should be handled properly and the weakly weathered rock can be fully utilized .

工程实践证明，这些方法成功地解决了上述条件下弱风化硬岩中大口径钻进的难题。

The engineering practice has proved that these methods solved successfully the problem of great caliber drilling in weakly weathered rigid rock by hydraulic piling rig .

同时，由PS测井所得到的土层及强、中、弱风化层的纵横波速还可对面波和折射波勘探中风化层位的划分起标定作用。

Meanwhile , the velocities of P-wave and S-wave gained by PS-wave logging from soil and severe , middling and mild weathering strata may take very important role in weathering demarcation for Rayleigh wave and refraction wave explorations .

三峡一期围堰全长2502m，其中665m长的一段基础中的强风化带含有块球体，弱风化带上部存在断层。

The first stage cofferdam of Three Gorges Project has a length of 2502 m , of which a 665 m long section 's foundation consists of the strong-weathered zone containing large ball rock blocks and the weak-weathered zone with a fault in its upper portion .

二是将已风化或弱风化岩体保护起来，配合锚固措施增加稳定性。

Protecting weathered rock and weak weathered rock with coordination of anchoring measures for increasing stability .

弱风化硬岩中大口径旋挖钻机钻进新工艺实例分析

Case study on new technique of great caliber drilling in weakly weathered rigid rock by Hydraulic Piling Rig

莲花水电站大坝趾板基础防渗帷幕，其轴线位于弱风化岩带，为了确保灌浆质量，采用了几种方法进行了质量检测。

The axes of the impervious curtain of toe slab foundation in Lianhua dam is located at the moderate weathering bedrock .

进入弱风化以后，岩体的力学参数达到Ⅲ级及以上岩体的标准。

Rock mass mechanical parameters of basalt and dolostone achieve or exceed criterion of grade III enter into weakly weathering belt .

弱风化淋溶的幼年土壤，多种营养元紊及其它肥力因子均较优越，具有更大的开发利用潜力。

Among them the soil with weak weathering has great exploitable potentiality according to contents of many nutritive elements and other factors of fertility .

松山引水工程大坝为面板堆石坝，趾板基础座落在弱风化安山岩上部。

The dam of Songjiang diversion project is a rockfill dam with face slab . The toe slab is situated on top of light weathering andesite .

对旋挖钻机在硬岩（如弱风化砂岩、灰岩）地层中进行大口径钻进的方法进行了研究。

It is studied the technique of great caliber drilling in rigid terrain ( such as weakly weathered sandstone or limestone ) using a hydraulic piling rig .

用于基岩固结灌浆，能使弱风化岩体的参数提高到微风化或新鲜岩体的水平；

If we use MMA for bedrock consolidation grouting , the parameters of weakly weathered rock can be lifted to the level of slightly weathered or fresh rock .

实验结果如下：（1）煤矸石风化物具有两个明显的成土发生层次：风化表层和弱风化淋溶层。

The result shows as following : ( 1 ) The weathering material of gangue pile has two obvious layers : weathering surface layer and weakly weathering eluviating layer .

杨庄截潜工程趾板段建基面以下为弱风化白云岩和含燧石条带白云岩，透水性较强，造成库水漏失严重。

The rock that under the foundation of toe-slab section of Yangzhuang dam is weak weathered zone of dolomite and flint dolomite with strong permeability , where cause severity seepage of the reservoir .

碾压混凝土坝高115.8m，设计建基面在弱风化带中部，局部软弱带采用固结灌浆提高其承载能力。

The design dam foundation surface is on the center of a weak weathered zone . Under this condition the consolidation grouting is adopted locally to the weak zone to heighten the bearing capacity ;

通过对应力扰动区的分析，以及隧道轴线位置、轴线升高或降低后各剖面应力扰动范围与弱风化层厚度的对比，很容易确定厦门海底隧道的最小顶板厚度；

By means of analysis of stress disturbed area , and comparing rock cover of weak regolith with stress disturbed area at axis and raising or decreasing , it is easy to determine minimal rock cover ;

从弱风化上段、弱风化下段到微新岩体，抗压强度以2～3倍的量级增大；而抗拉强度以一个数量级增大。

The compress strength of basaltic rock mass increases by 2 ~ 3 times from upper part , lower part of weakly weathered rock mass to fresh one , While tension strength increases with 1 magnitude .

当微、弱风化硬质岩石挖深超过34～36米，软质岩石或强风化硬质岩石挖深超过28～30米时，可考察采用隧道方案的技术可行性。

When the digging depth is greater than 34 ~ 36 meters in slight weathering hard rock or 28 ~ 30 meters in soft nature rock or in serious weathering hard nature rock , the tunnel scheme should be considered .

趾板基础和堆石体各区砂砾石基础开挖，除趾板与其下游1/9底宽范围以及坝脚挖除冲积层至弱风化（局部微风化）基岩外，其余部分均予以保留。

As for the excavation of the sand gravel zones , except the toe slab and its 1 / 9 bottom width down stream , the alluvial layers are excavated to the micro weathered rocks , while the other sections remain unexcavated .

本文对厦门花岗岩风化壳进行了系统地分带，共分为新鲜岩石带、微风化带、弱风化带、强风化带、不均匀风化岩土带及残积土带。

Based on comprehensive and systematical study , Xiamen granitic weathered crust is divided into different zones , which are fresh rocks , slightly weathered zone , moderately weathered zone , intensively weathered zone and uneven weathering rock or and soil zone and residual soil zone .

以三峡工程坝基岩体开挖爆破为背景，在弱风化花岗岩底板内进行了6次现场爆破试验，测量出距爆源不等距离处的36组地震波形。

Taking the excavation blasting of bed rock mass in Sania Project as the background , six blasting experiments have been done at the bottom of weak weathering granite in Sanxia dam and the 36 sets of seismic waveform at different positions away from the explosion sources are measured .

弱透水性溶蚀风化深槽地基加固机理分析

Mechanism Analysis of Foundation Consolidation of Weakly Pervious Dissolving Weathered Deep Groove