注浆混凝土桩在杭千高速公路路基处理中的应用

注浆混凝土桩是预填骨料压浆混凝土桩,它是近几年新开发的一种桩型.本文通过注浆混凝土桩在杭千高速软弱地基中的应用,具体讨论了该桩的设计理论和施工工艺,着重分析了设计施工中的关键-砂浆配比问题,并初步探讨了注浆混凝土桩施工过程中易发问题及其处理措施,以期为这种桩的推广应用提供借鉴作用.     

多层住宅现浇楼板裂缝产生的研究

本文以未确知数学相关理论为基础,探讨其在多层住宅现浇楼板裂缝产生与防治中的应用。     

注浆技术处理桩基事故

某工程由于桩挤土效应和基坑开挖不当引起桩基事故,根据桩质量检测结果和场地地质情况,对基底砂土进行注浆加固,然后在基础和地基之间铺设褥垫层形成复合地基,通过承载力和沉降计算提出了加固方案,静力触探和荷载试验结果均表明注浆明显提高了地基土的承载力,建筑物沉降达到了设计要求。     

Aragonese Tiles in a Flemish Castle: A Chivalric Gift-Exchange Network in Fifteenth-Century Europe

Excavation of the mid-fifteenth-century castle of Pieter Bladelin, a high-ranking Burgundian official, in the village of Middelburg-in-Flanders, near Bruges (Belgium), has unearthed a remarkable series of blue and white painted and glazed floor tiles. Post-excavation archival and heraldic inquiries into the tiles has led to a deeper understanding of the role that gift exchange of luxury objects played within the diplomatic network of Alfonso V “the Magnanimous”, King of Aragon, and Philip “the Good”, Duke of Burgundy, in shaping a shared chivalric and crusading culture between Burgundy and Aragon. The study demonstrates the added value of the integration of archaeological and historical data in studying economic, political and cultural processes for the later medieval or early modern period.     

顾桥煤矿南区进风井地面预注浆施工工艺

针对顾桥煤矿南区进风井井筒新生界松散层厚,注浆深度深、质量要求高、工期紧等特点,采用直孔与S型钻孔相结合的注浆施工技术,取得了良好的效果。着重介绍了注浆技术方案、施工工艺、注浆效果及经验、体会等。     

巷道底臌的治理与研究

根据爆破卸压的原理，在巷道底板通过爆破进行局部松动破坏形成一个松动圈，从而达到减缓或消除底臌，并研究单面卸压技术参数，对施工关键环节加以论述，为现场应用提供指导。     

Finite element study on impact sound transmission through a floating floor

To understand the characteristics of impact-sound transmission through a floor is very helpful for developing sound attenuation strategies to acquire a high quality of dwellings. Sound transmission through a floating floor to the room underneath was modeled by finite-element method (FEM). The sound pressure levels calculated by the FEM model on a scale of 1:4 was compared with the measured values, which demonstrate good agreement, particularly for impact sound of a relatively low frequency. The sound pressure level in a receiving room is strongly affected by the structural characteristics of both the floor and the room. The sound pressure transmitted through a clamped floor is lower than through a simply supported floor because of the larger rigidity of the clamped floor that contributes to the attenuation mechanism of stiffness. Increase in the thickness of the fiber-glass damping layer in the floor improves sound insulation. A larger room has a larger capacity to dissipate the sound pressure and thus has a lower sound pressure level. An asymmetric configuration of room avails sound attenuation because it has weaker structural and acoustic coupling than a symmetric one.     

现浇楼板砼裂缝的防治与控制

随着现浇楼板、商品混凝土的广泛应用和砼强度的提高，现浇楼板中出现的裂缝问题也越来越备受人们关注，本文结合工程实践，分析了裂缝的原因，并提出防治与控制方法。     

改性环氧丙烯酸UV树脂的合成及应用

采用聚乙二醇(200)代替部分丙烯酸来改性环氧丙烯酸UV树脂，可保持光固化时间基本不变而改变EA树脂的脆性，讨论了改性剂用量、催化剂选择、温度控制，得出了适宜反应条件。此树脂可和EA树脂配成UV木地板涂料。     

苏州胥江桥预应力施工技术

苏州胥江桥为预应力桥梁 ,桥型由预制梁形成连续梁和组合梁 ,本文主要介绍预应力铺束、张拉工艺、灌浆工艺。