莲麓水电站大坝横缝渗漏骑缝钻孔阻渗处理技术

蓄水后出现渗漏是水电站施工的通病,其渗漏处理方法多种多样,但大部分都治标不治本。本文介绍了莲麓水电站大坝横缝渗漏采取骑缝钻孔进行化学灌浆阻渗的处理过程,其根治渗漏的经验可供水电站横缝渗漏治理作为参考。     

龙口水电站大坝横缝渗漏处理工程的施工工艺

介绍了坝顶垂直骑缝钻孔化学灌浆施工工艺在黄河龙口水电站大坝横缝渗漏处理工程中的应用,从施工后的效果来看,采用该施工工艺,圆满地解决了水电站大坝横缝渗漏的问题。     

湖北利川某水电站混凝土大坝裂缝普查及处理工艺

水电站混凝土大坝局部裂缝是常见的混凝土缺陷之一.本文介绍了湖北利川某电站混凝土大坝裂缝的普查分类和针对不同类别裂缝的处理工艺,对于浅层裂缝采用水泥基渗透结晶型防水材料涂刷,对于不渗水或渗水量较小的裂缝采用环氧树脂灌浆+环氧胶泥涂刷,对于渗水量较大的裂缝采用聚氨酯灌浆+环氧胶泥涂刷.上述处理方法可为水工建筑物混凝土裂缝处...     

官地水电站大坝混凝土裂缝检测及处理技术

文章结合官地水电站的实践经验,对碾压混凝土重力坝的裂缝检测、修补材料和修补处理技术进行了详细的介绍.     

溪洛渡水电站导流洞衬砌混凝土裂缝处理技术

在工程建设中,混凝土在硬化期间经常会出现各种形式的裂缝.根据混凝土裂缝的性质和具体情况可以采用不同的处理方式,即表面修补法处理和深度固化处理.根据溪洛渡水电站左岸1～3号导流洞衬砌混凝土裂缝情况,主要采用化学灌浆法进行裂缝处理,其化学灌浆材料分别选用PSI-CW改性环氧和Denepox40环氧树脂.左岸导流洞衬砌混凝土共处理了1267m裂缝.裂缝处理后,混凝土表面干燥,裂缝处未见渗水现象发生,裂缝处理取得了良好的效果.     

塘口水电站大坝水工混凝土裂缝处理

分析了水工建筑物混凝土裂缝产生的因素．介绍了常见的裂缝修补方法．并以塘口水电站大坝为例简要介绍了混凝土裂缝处理的具体措施。     

察汗乌苏水电站泄洪洞混凝土衬砌裂缝化学灌浆处理

结合察汗乌苏水电站泄洪洞混凝土渗漏水情况,采用"内填外堵、多层设防、复合防水"多重措施相结合的修补方案。对于宽度超过0.1mm,深度大于5cm的裂缝,采用LW和HW型水溶性聚氨酯化学灌浆材料进行充填处理。详细介绍了灌浆处理施工流程和施工工艺。经两次灌浆处理后,大部分裂缝治理效果明显。     

化学灌浆技术在宝钢热轧厂工程混凝土裂缝处理中的应用

上海宝山钢铁厂2050热轧带钢厂是从联邦德国成套引进的宝钢二期工程中最大的工程之一。该工程施工过程中广泛应用化学灌浆技术,先后处理了30多条混凝土裂缝及渗漏水问题,取得了一定成效。     

水电站工程重力坝混凝土裂缝的处理分析

本文对水电站工程重力坝混凝土裂缝产生的原因进行了分析,表明混凝土裂缝处理的重要性,并针对具体工程探讨了裂缝的控制和处理,以供参考。     

高压喷射灌浆在喜河水电站大坝围堰上的应用

用三管法高压旋喷灌浆的方式，进行上、下游围堰基础灌浆防渗处理。用回填灌浆与高喷灌浆相结合的灌浆方法，针对特殊孔段进行特殊处理。当局部漏水量偏大时，增加防渗排予以补强。墙体连续。防渗效果明显。     

拱坝坝肩开挖及地基处理措施研究

结合实际工程，对天花板拱坝的坝肩开挖及地基处理措施进行了研究，根据实际地质情况提出了坝基开挖、固结灌浆、接触灌浆、帷幕灌浆、基础排水、断层破碎带处理和岸坡锚固支护等措施，以使坝基满足稳定、应力、变形、抗渗和耐久性等各方面的要求。     

地下室混凝土裂缝的成因及治理

分析了某地下室防水工程出现裂缝从而引起渗漏的原因,介绍了该工程裂缝和渗漏的综合治理办法。     

Feasibility of columnar jointed basalt used for high-arch dam foundation

Columnar jointed basalt, with a lot of small-spacing structural planes and poor integrity, is a kind of fractured rock mass. Through comprehensive study of columnar joints shape, roughness of fracture surface and chemical composition of basalt, it is known that columnar joints of Baihetan dam area were formed as a result of cooling and shrinkage effects of magma. The columnar jointed basalt is mainly formed through chemical reaction of chlorite, kaolinite, epidote and tremolite, and the columnar joints mainly consist of chlorite according to slice identification and chemical analysis. Test results show that the columnar jointed basalt has high uniaxial compressive strength, low friction coefficient, and high cohesion, shear strength and deformation index. Meanwhile, the columnar jointed basalt is closely locked, and joint surfaces are well closed. The permeability of the rock is quite weak, and the P-wave velocity in the rock could get up to 5 000 m/s. All these show good rock properties. The columnar joints develop regularly, different from the general fractured rock masses. In summary, the columnar jointed basalt can be used directly as a foundation of dam.     

地基处理中后压浆混凝土灌注桩技术应用初探

以某地基处理项目试验桩工程为依托,对1#、2#混凝土灌注试验桩进行后压浆技术处理,3#、4#混凝土灌注试验桩不进行后压浆处理,做静载对比试验。结果显示,1#、2#桩的承载力明显高于3#、4#桩,说明后压浆混凝土灌注桩可以显著提高地基承载力。     

化学灌浆技术在云南某大型水电站坝体裂缝治理中的应用

云南某大型水电站坝体混凝土由于多种原因产生了多条贯穿或不贯穿的裂缝,严重影响了大坝的安全运行,经专家研究论证,宜采用化学灌浆技术对坝体混凝土裂缝进行处理。本文介绍了该水电站裂缝分布情况及产生的原因、化学灌浆施工技术要求、施工过程和化灌质量的评定情况。     

超长钻孔桩在软土地基中的应用

针对甬台温高速公路超长钻孔桩在软土地基施工中遇到的问题，介绍了一些简单易行、效果显著的处理措施，以保证桩基的施工质量，可参考借鉴。     

Treatment design of geological defects in dam foundation of Jinping I hydropower station

Jinping I hydropower station is one of the most challenging projects in China due to its highest arch dam and complex geological conditions for construction.After geological investigation into the dam foundation,a few large-scale weak discontinuities are observed.The rock masses in the left dam foundation are intensively unloaded,approximately to the depth of 150–300 m.These serious geological defects lead to a geological asymmetry on the left and right banks,and thus some major diffculties of dam construction are encountered.In this paper,the influences of geological defects on the project are analyzed,followed by the concepts and methods of treatment design.Based on the analysis,the treatment methods of the weak rock masses and discontinuities are carefully determined,including the concrete cushion,concrete replacement grids,and consolidation grouting.They work together to enhance the strength and integrity of the dam foundation.Evaluations and calibrations through geo-mechanical model tests in combination with feld monitoring results in early impoundment period show that the arch dam and its foundation are roughly stable,suggesting that the treatment designs are reasonable and effective.The proposed treatment methods and concepts in the context can be helpful for similar complex rock projects.     

混凝土裂缝灌浆修补的选材与处理

本文主要针对工程中经常出现的混凝土裂缝问题，详细论述了灌浆修补这一多用补救措施的选材与处理方式。文章从理论和实践的两方面来介绍这种修补裂缝的方法。