安徽铜山铜矿床有关地质体中稀土元素特征及其地质意义

通过铜山铜矿床某些地质体稀土元素特征的研究，对花岗岩体的物源、类型和形成环境、矽卡岩的成因类型、接触变质产物及变质作用类型等进行了追溯。深化了对该区矿床地质问题的研究。     

透地雷达检测路面脱空与灌浆加固的应用效果

应用透地雷达高精度检测公路混凝土路面脱空发育程度等病害，并采用水泥化学灌浆补强加固，取得了良好的效果。     

悬浮液原子荧光光谱法测定化探样品中的痕量汞

拟定了将悬浮液技术与汞蒸气原子荧光光谱法相结合测定化探样品中痕量Ｈｇ的分析方法。控制悬浮液中试样粒度在２００目，试样质量浓度１５ｇ／Ｌ，用电磁搅拌和载气搅拌保证悬浮液分散稳定，水溶液标准作校正曲线，方法的检出限为６ｎｇ／ｇＨｇ。对水系沉积物国家标准物质中痕量Ｈｇ进行测定，结果与标准值相符，对含Ｈｇ０１０μｇ／ｇ的ＧＢＷ０７３０５（ＧＳＤ５）测定１１次，ｘ为０１０５μｇ／ｇ，ＲＳＤ为５４％。     

粘土水泥浆在井筒地面预注浆中的应用

粘土水泥浆注浆材料是一种新型的较理想的注浆材料，在平顶山十三矿主，副井井筒地面预注浆中应用了粘土水泥浆注浆法，取得了良好效果，并积累了一定的经验。     

伊朗SK500m探层试验孔钻探工艺

在伊朗ＳＫ５００ｍ探层钻孔施工中，采用ＰＨＰ－ＣＭＣ凝胶低固相泥浆顶漏钻进覆盖层，以清水和金刚石单动双管取心钻具钻进试验段，进行压水试验后，一周 用ＰＨＰ－ＣＭＣ凝胶无固相冲洗液护壁钻进至终孔，并利用泵压注浆水加固孔壁，较好地解决了防斜，堵漏止涌以及取心困难等技术问题     

高速公路下伏采空塌陷区的治理方法

路基下方采空区的存在，严重地影响了高速公路的安全和运营。为解决此问题，根据不同采空区的工程地质条件，彩不同的压力注浆方法进行采空区治理。注浆浆液为水泥粘土浆液或水泥煤灰浆，水固比在１：１－１：２之间，水泥占固相总重量的１０％－５４％之间。     

压密注浆工艺在处理浜填土地基中的应用

通过对压密注浆工艺的技术和经济分析比较,并介绍该工艺在处理浜填土地基中的成功经验,从而得出压密注浆工艺是一种造价低、施工操作简便、周期短、加固效果良好的处理地基方法。     

振动成孔高压喷射注浆成墙技术

介绍了研究成功的振动成孔高压喷射注浆成墙技术的概况，设备配置及ＤＪ－６０型振孔高喷机，施工工艺和工程应用情况，并对其技术性，经济性作了简要分析。     

Compressibility behaviour of lime-treated marine clay

The necessity to tap natural marine resources from the ocean beds represents a considerable challenge for the construction of offshore structures on weak marine deposits. The use of lime to improve the behaviour of soft clays is not new. The present investigation examines lime-induced changes in the compressibility of marine clay. The test results indicate a reduction of 1/2 to 1/3 in the compressibility of the soil system within 30 to 45 days of treatment. The formation of various cementation compounds due to soil–lime reactions improves the soil characteristics with time. The results encourage the application of lime column and lime injection techniques to improve the engineering behaviour of soft marine clayey deposits. However, one has to be cautious in applying the lime technique to marine clays that contain sodium sulfate.     

Properties and performance of a high volume fly ash grout

Abstract

This study investigated the penetrability of high volume fly ash cement suspensions prepared with and without superplasticizer into sandy soil having different relative densities with 30%, 60%, 73%, and 83% through permeation grouting. Class C fly ash was used due to its pozzolanic activity and fineness. Due to engineering characteristics and cost, cementitious grouts are the most commonly used grout in both waterproofing and ground strengthening. Fly ash-cement grouts have relatively constant and low viscosity values for a reasonable period after preparation, exhibit limited or negligible bleed capacity and set and develop satisfactory strength within a relatively short period. Modeling of grouting of soil was done in laboratory and improvements in physical and mechanical properties of grouted soil were analyzed. Unconfined compressive strength, shear strength and permeability characteristics of grouted soil were studied as a result. Unconfined compressive strength values of grouted sand with high volume fly ash ranged between 410 and 1107?kPa. Morover, cohesion values were comparable to microfine cement grouting ranging from 373 to 511?kPa. Furthermore, permeability values were also approximately equal to the permeability of impervious liners, which is around 1?×?10^?7?cm/s. The findings support the applicability of grouting in different applications.