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Mycetes in tunnel mainly come from outside and grows in humus in tunnel and increasingly pollutes more places.

坑道内的真菌主要来自于外界进入和坑道内部大量腐殖质繁殖，并逐步扩大污染范围。

According to the space distance between the metro structure and adjacent buildings, the degree of surface settlement and tilt of adjacent buildings caused by the construction of metro tunnel excavation, we divide the degree of adjacent buildings affected by a single metro tunnel construction into four adjacent grades, that is very nearby, quite adjacent, adjacent and nonadjacent, and give the criteria for the classification and the calculation method of the settlement and tilt of building close to metro.

依据地铁结构与邻近建筑物间的空间距离、地铁隧道暗挖施工引起地表沉降和邻近建筑物倾斜的程度，将受单个地铁隧道施工影响的邻近建筑物的邻近程度划分为很邻近、邻近、较邻近和不邻近4个邻近等级，并给出划分标准以及邻近地铁建筑物沉降及倾斜的计算方法。

To several cavities,such as circular cavity、oval cavity and olivary cavity, anlyses surrounding rock stability,and expatiates major factors which impact tunnel surrounding rock stability and determinant gists by considering the chacteristics of large span and flat tunnel.

对几种常见洞室—圆形洞室、椭圆形洞室和卵形洞室开挖后的应力重分布进行了分析，并结合大跨扁平隧道的特点，阐述了影响隧道围岩稳定性主要因素与判定依据。

The application of smoothwall blasting in crushed surrounding rock of No.2 tunnel with crushed surrounding rock has obtained more satisfactory results through selecting rational blasting parameters,adopting right supporting method and controlling the overbreak or underbreak of the tunnel effectively,etc.

文摘：在周家山2号隧道破碎围岩施工中，应用光面爆破技术，通过选择合理的爆破参数，正确的支护施工方法，有效地控制隧道的超欠挖，加快掘进速度，取得了较理想的效果。

2Combined with dense-constructed area of Shiqiaotou tunnel, a series of factors that lead to ground deformation and affect the stability of ground buildings are systematically analyzed.These factors include overbreak in shallow tunnel, reserved deformation and soil squeezing.By calculation and analysis of ground deformation of other sections,a division of settlement controling grade is made.

2以石桥头隧道地表变形重点控制地段为例，对浅埋隧道超挖、预留变形量、掌子面土体挤出等地层损失诱发的地表变形及其对地面建筑稳定性的影响进行了系统地计算和分析；通过地表变形的计算分析，对隧道不同地段的地表变形控制等级进行了划分。

Dabieshan mountainous area belongs to non-metamorphic petrographical region, and it is the first time for tunnel fire in the history of railway construction, which puts forward a new subject for the construction of gas tunnel in passenger dedicated line.

大别山区系非变质岩区，隧道着火为铁路施工史上的首次，给客运专线瓦斯隧道施工提出了新课题。

Underground PuNan section of Wucunshan Tunnel in Phase I project of Xiamen Airport Road construction is a typical example in China because of its large span shallow underground tunnel located just below concentrated urban architectural complex.

厦门市机场路一期工程梧村山隧道下穿浦南段是国内罕见的下穿密集建筑群的城市浅埋大跨连拱隧道，开挖跨度达34 m，围岩以Ⅵ级围岩为主，埋深仅10~30 m，地下水埋深2~4 m。

Therefore, to study the reconsolidation of disturbed soil and its influence on metro tunnel is very useful for controlling the disturbance of construction and the deformation of metro tunnel.

因此，研究扰动土体再固结及其对地铁隧道的影响，对于控制地下工程施工扰动和地铁隧道变形是很有用的。

For the tunnel built in soft soil, it would deform along with the reconsolidation of disturbed soil, and the structure of tunnel and the operation of metro would be endangered.

对于软土地区的地铁隧道来说，下卧扰动土体的再固结使隧道随之产生变形，从而危及隧道结构和地铁运营的安全。

With the rapid development of highway,the big section highway tunnel takes a new step forward,which promotes more advanced challenges and requestion to tunnel's design and construction technique.

随着高速公路的迅速发展，大断面公路隧道也跨上了一个新台阶，相应地对隧道设计和施工技术也提出了更高的挑战和要求。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。