盾构始发技术在沈阳地铁一号线中的应用

文章结合沈阳地铁一号线第4合同段盾构的正常始发,通过对盾构始发施工的技术难点分析,重点介绍其施工工艺及关键技术,并对常见的问题提出相应的预防措施。     

大股东隧道行为对中小投资者信心及行为的影响研究——基于问卷调查

本文利用问卷调查的方法,研究了普通中小投资者对大股东隧道行为、投资者保护等问题的认识和理解,以及隧道行为对中小投资者的信心、行为、投资策略等的影响。通过对问卷结果进行统计与分析,发现大股东的隧道行为会造成中小投资者信心缺失,并使投资者做出相应的行为调整,改变他们对市场发展的判断和看法,最终给资本市场带来负面影响。     

预加固技术在隧道不良地段的研究

预加固技术在隧道穿越不良地段时具有明显的支护效果及显著的经济效益,本文对各种预加固技术,如小导管,管棚,锚杆,水平旋喷注浆成拱,人工冻结,预切槽法进行了阐述与总结,并分析当前预支护的研究现状,提出相关建议及思考,供类似隧道施工参考。     

China’s secondary privatization: new evidence on controlling shareholders tunnelling

This article utilizes the 2005 split-share structure reform (SSSR) in China as a natural experiment and conducts difference-in-differences (DID) tests to analyse corporate governance changes among Chinese SOEs compared to POEs. We show that tunnelling significantly reduced in both POEs and SOEs after the SSSR. More importantly, we find a significant and positive ‘privatization effect’ on SOEs’ tunnelling activities during the post-reform period suggesting the reductions of tunnelling were smaller among SOEs than POEs following the SSSR. In contrast, excess returns around the SSSR indicate that investors expected a negative ‘privatization effect’ on SOEs’ tunnelling. These findings suggest that the quality of corporate governance did not improve among SOEs as a result of the secondary privatization as the stock market expected without fundamental changes to firm ownership and control following the SSSR. The benefits of privatization accrue to the government controlling shareholders rather than minority investors.     

煤矿掘进循环作业方式浅析

科学的安排掘进循环作业,是提高掘进速度和掘进效率的有效方式。本文阐述了掘进循环作业的意义,介绍了如何科学的选择循环作业方式、速度和时间。     

高地应力条件下软岩掘进技术浅析

本文结合锦屏二级电站C2标引水隧洞的具体施工,重点介绍在高地应力环境条件下,软弱围岩大断面隧洞的掘进技术,其措施可为类似工程施工提供借鉴与参考。     

Leadership and firm value among couples in charge: Evidence from Chinese listed family firms

This study investigates how leadership by married couples affects the firm value of family businesses in the institutional context of the Chinese capital market. Marital leadership is found to significantly decrease firm value compared with other family firms, which is supported by a battery of estimation strategies. Aggravating the principal–principal problem, tunnelling behaviour and financial fraud are confirmed as potential economic mechanisms. Moreover, monitoring from the internal corporate governance and external institution environment helps marital leadership focus on shareholder wealth beyond family interest. Our findings indicate that marital leadership implies more of a collusion effect than a collaboration effect in China.