安全地向前移动

帕丁顿车站（Paddington Station） - 全世界著名的不仅是其创作者Isambard Kingdom Brunel，而且还以一只小型果酱爱熊而闻名。每天平均有26,500名乘客从Paddingtion Station行驶。尽管具有维多利亚时代的优雅和富丽堂皇，但仍制定了计划建造直接在历史地标下方的全新地下车站。这个基础设施项目是由Crossrail进行的，是欧洲最大建筑项目的一部分。新车站将被称为Crossrail Paddington站。

Since July 2011, plans have been developed by Crossrail to complete a new underground network for London. In August 2011, working as a joint venture on behalf of Crossrail Limited, Costain Skanska was awarded Crossrail contract 405 to complete the complex £14.8 bn rail project. This project is creating a major new railway line, stretching 118 kilometres (approx. 73 miles) from Reading and Heathrow to the west of London, to Abbey Wood in the east. It will also pass directly underneath central London. The new network will now connect seven brand new mainline underground stations, all of which are important interchanges between existing Network Rail services and the London Underground. One of these new stations is the Crossrail Paddington Station.

细心的计划以监视上方和下方的结构
直接在伦敦的心脏地带工作有许多挑战。这座城市拥有超过800万人的家园，其地下将处理每年十亿的旅程。帕丁顿的新越野站不仅被现代建筑包围，而且还被历史悠久的建筑所包围。它还位于伦敦市中心密集的区域，其管道，电缆和下水道迷宫，使其成为一个极其复杂的建筑项目。由于伦敦被认为是一个全球城市，因此即使对于一个大规模的项目，它也必须不加干扰。因此，Crossrail站被建造为四层楼高的自上而下结构，在下面的开挖侧面进行时，地面上方有双向实时交通。

所有这些挖掘,放松Lo中部的污垢ndon could settle unevenly and potentially cause structures to tilt or severe cracking could develop. Constant monitoring of buildings in this area was vital to avoid possible damage and this is how Leica Geosystems products and solutions play an important role in securing the success of this new railway line by monitoring structures and the degree of earth settlement.

Robotic total stations observing Paddington 24/7
Costain-Skanska决定使用52 Leica TM30实施实时监控解决方案，尤其是用于监视设计的总站，以及在Paddington地区及其周围的所有类型的棱镜中超过1,800多个监视棱镜。亚博5分钟快三设备附在建筑物外部的各个关键位置上。高度准确的3D数据是从总站收集的，这些数据衡量了整个地区建筑物中战略性放置的各种棱镜的关键参亚博5分钟快三考点。这些测量值每天大约每天8,500点，每天进行。At the recent phase of the project which was called “the bulk dig”, the data capture for the majority of the area’s total stations takes place at six hour intervals each day, after which the data is sent to be processed with Leica GeoMoS, which sends the results to the web portal before they are distributed to the construction team. The use of Leica Geosystems monitoring sensors, software and communications is vital to the Crossrail project, as these accurate measurements provide information on any variations in structures caused by earth movement and minimise risks, not only to the buildings themselves, but also to public safety.

Automated data processing in near real-time
Such projects require constant observation, repetitively measuring the same routes and reference points several times daily throughout the entire project’s life span. By using robotic total stations such activities can be done automatically and data is directly transferred for processing using Leica GeoMoS, GeoMos Adjust and GeoOffice software.

Three interlinked servers are used to run the Leica Geosystems software programs at the Crossrail construction site. The software is used to detect and analyse ground movement and the deformation of buildings above and below the site, and also helps to speed up and simplify the processing of real-time data collected by the total stations by up to 90 %, allowing data to be available from field to issue quickly. This software solution for the new Crossrail Station is entirely from Leica Geosystems, and is the largest of its kind existing anywhere in the world. Engineering Survey Manager for Constain-Skanska Joint Venture, Steve Thurgood, reports
“软件系统必须非常规定和程序，以控制项目的质量和重复性，同时也可以进行环境和施工阶段变化的动态变化。我们的操作不停地运行，我们管理软件系统，以最大程度地减少可能发生的任何故障。这两个软件系统都记录了与惊人的准确性和精确度相关的惊人数据。”

The Leica GeoMoS software solution is a fully automated system for data generation. It offers automated processing and evaluation using statistical analysis, comparing new data to the original base model by using easy to understand graphs. The software also continuously updates deformation analysis and network adjustment with vast volumes of real-time data received by the 44 to 49 * total stations, resulting in highly accurate data delivered fast.

处理数据后，还通过网络调整软件进行了优化，以进行协调的几何形状，地形和准确性。如果任何数据都不在先前收集的数据的±10 mm球体内（通常不年龄在大约六个小时的情况下），则认为这是不正确的。监督操作的工程测量师评估并将数据与预定义的数据参数进行比较，并快速决定是否需要采取措施。

The co-ordination of displaying the processed data with on-site construction teams helps considerably to complete technical work without disruptions. GeoMoS increases not only productivity uptime by displaying real-time data but also simplifies workflows by constantly validating data before issuing it to the teams.

Dedicated teams and reliable equipment
Dedicated round-the-clock operation and maintenance teams actively maintain the entire Crossrail project’s Leica GeoMoS software solution and also clean and maintain the 42 to 49 total stations and over 1,800 prisms. The total stations take six people to run plus an additional part time support staff of five persons in the field. All involved total stations are serviced and maintained at Leica Geosystems Service Centre in Milton Keynes.

“Crossrail’s motto is ’Moving London Forward‘. Within our engineering surveying team who run the precise levelling scheme and the largest Leica Geosystems homogeneously adjusted total station scheme in the world, we adopted a complementary motto due to the success we’ve had to ’Moving surveying for monitoring forward’. None of the above however would be possible without the continued support of Leica Geosystems and its supply chain partners”, concludes Steve Thurgood, Engineering Survey Manager for Constain-Skanska Joint Venture.

Written by Natalie Binder