Slope movement monitoring at Hinkley Point C

案例分析

Hinkley Point C监视案例研究视觉

作者：史蒂夫·瑟古德（Steve Thurgood）

新的Hinkley Point C（HPC）核电站在英格兰萨默塞特郡的建设中将生产3.2 GWE可靠的低碳电力 - 足以为600万英国的房屋供电。该项目超出了大约7％的英国需求的低碳电力供应。它将为该地区带来社会经济利益，从增加当地就业机会到建立可持续的区域供应链，并提高新的培训设施和资格。

HPC’s slope monitoring programme started alongside the Kier BAM joint venture enabling works and constitutes a mixture of an automated total station (ATS) system, inclinometers, extensometers, strain gauges, and piezometers. The monitoring programme collectively monitors vertical slope movement against specific design parameters. The Kier BAM enabling works and the constructed slopes create the foundations for the nuclear power station and the working area to follow contractors. The applied monitoring solution is set to record any slope movement during the construction and operation phase.

处理大型项目

The HPC project scope meant any installed ATS system had to have an integrated optical and GNSS survey control network to transfer fixed control from stable positions to common control prisms within areas expected to see ground movement. A combination of theLeica Geosystems监视解决方案及其分销伙伴SCCS被选为通过经过考虑的调查提供ATS系统。解决方案包括Leica Nova TM50监视总站亚博5分钟快三通过驱动Leica GeoMoS和supported with theMicroSurvey Star*Net adjustment tool. The system runs every two hours, measuring slope monitoring prisms to the specification of ±1mm. The monitoring results are reported against construction and operational design triggers – accelerated ground movement beyond expected design would enable additional structural ground control measures.

The monitoring programme and the ATS system’s goal is to ensure slope movement performance against design, ultimately ensuring health and safety.

Image 1 (left): TM50 and mounting post, monitoring excavation. Image 2 (right): Typical setup of a monitoring system and control prism adjacent to excavation works

Image 1 (left): TM50 and mounting post, monitoring excavation
图像2（右）：监视系统和控制棱镜的典型设置与发掘作品相邻

Selecting the right equipment

Deciding on a hardware and software provider is all about partnership. For the HPC project, this was a crucial factor. Only a firm, all-encompassing collaboration can satisfy the expected monitoring needs in terms of performance, durability, and reliability.

“Hinkley Point C is located adjacent to the Severn Estuary and is exposed to the Atlantic’s prevailing winds. I needed a product that could withstand these conditions, and I believed Leica as a respected and established brand was a safe selection to meet the project requirements,” said Ben Crossland, Senior Monitoring Surveyor at HPC.

After comparing diverse solutions, available on the market, HPC went for the collective power of Leica Geosystems’ and their distributor SCCS. The reasoning behind the decision was multi-layered – the equipment had to withstand the site’s conditions; the instruments had to perform flawlessly and enable surveyor control network integration. HPC required an “all-inclusive” package, including software, hardware,服务和专业支持，以满足HPC自动化总站系统的自动化需求。

Image 3 (left): GNSS/360° prism survey control point. Image 4 (right): ATS with control box, WLAN radio and mounting post

Image3（左）：GNSS/360°Prism调查控制点
Image 4 (right): ATS with control box, WLAN radio and mounting post

解决方案

Leica Nova TM50监视总站亚博5分钟快三provided durable and precise instruments with the Leica GeoMoS monitoring software. Survey control measurements were processed by SCCS’s bespoke automatic adjustment script, which uses MicroSurvey Star*Net to adjust the ATS control network before every scheduled array slope monitoring measurement cycle. This system provided a fully integrated network, which would help remove the risk of false movement caused by survey control movement. The applied solution consists of the following components:

软件：

Hardware:

  • 40 xLeica Nova TM50监视总站亚博5分钟快三
  • 6 xLeica GMX910GNSS smart antenna
  • 25 xLeica GRZ122 prisms
  • 2000 GMP104和其他监控棱镜
  • 2 xLeica Nova MS60多阶段
  • 1 xLeica LS15digital level
  • 1 xLeica Nova TS60total station
  • 3 x PC具有独立功率和备份存储
  • 46 x Communication and power enclosures with GSM/WLAN radios and solar panels
  • 60 x TPS/GNSS/Prism mounting posts (1.2~1.8m tall) & protection enclosures for TPS

Leica LS15数字水平和Leica Nova TS60机器人总站手动用于调查控制和手动监视验证检查，以验证ATS网络正常运行。与这些检查一起，HPC有六个Leica GMX910智能天线通过Leica GNSS蜘蛛软件进行控制。一个天线坐在一个永久的基站上；其他人在工作区域内分布。天线的位置与Leica GRZ122 prisms允许ATS网络使用位置作为固定控制。调查方法的集成允许实时位置检查以确保相对稳定的位置不会受到施工的影响。在阻塞棱镜的地区Leica Nova MS60 MultiStation被用来扫描相关区域。然后将数据进口到Leica Infinity以进行云比较。当自动扫描是在危险区域内安装和维护棱镜的不切实际性，MS60的扫描能力也是在Geomos中使用的。”

“We placed our GNSS systems differentially – one in a stable position (and fixed), the others in relatively stable positions, that are also considered pseudo-fixed. The potential for the positions to move was the reason for including GNSS as part of the solution. In this way, we could ensure unforeseen movement of fixed control positions that we deemed stable, was captured and addressed,” informed Crossland about the technical challenge. “We started with just prisms then realised our reference frame was flexing,so we asked advice from our supplier who helped solve the network stability problems we had by integrating GNSS”.

We needed to trust the equipment and the expert suppliers

“与Leica Geosystems和SCC建立供应合作伙伴关系的主要好处是工具本身。这是我们信任品牌的地方。另外，它得到了极大的支持，” Crossland总结了他们的经验。“您知道您要支付的费用 - 高质量值得投资。我们对它的运作方式感到满意，并一直期待新的进步。”

另一个决定性的因素是所有事物无缝合作的方面。互操作性对于设置复杂的系统作为HPC监视至关重要。因此，Geomos平台将这些多个数据源组合到均匀的监视系统中。由于项目的动态性质，ATS系统布局每周都会改变。该公司始终努力优化该操作，因为新的工作区域开放/关闭并改善了监视过程，以确保劳动力的安全。

Customising the solution

Complex projects require the equipment/software provider to understand the customer’s needs thoroughly and always offer suggestions leading towards the optimal solution. The partnership went beyond the mere software/hardware support – with cooperation in operation plan optimisation, and custom builds related to the communication network (e.g., WLAN spanning the entire project).

典型的深度发掘被用岩石锚螺栓固定在裂缝的岩石中，并由岩土工具和各种地球棱镜阵列监测，并具有自动TM50，以确保工人的安全性和毗邻深挖掘的安全性。

图像5：用岩石锚螺栓的喷涂混凝土外墙固定在裂缝的岩石中的典型深部开挖，并由岩土仪器和各种大地棱镜阵列监测，并具有自动化的TM50，以确保工人在深度挖掘中的安全性。

It’s all about the data

每两个小时，一年中的每一天，Geomos都会完全自动完成计划的任务，以指示ATS系统收集一系列测量，以计算和更新ATS位置。一旦更新，他们就测量了斜率监视棱镜并计算出任何变形。在Geomos中报道了Prism反对基线的运动，并自动发送给客户的观看门户Missionos。Maxwell GeoSystems Mission OS组合了所有HPC监视数据，调查棱镜数据，倾斜度，应变计，压力计计和延伸仪。所有监视数据均通过每日部分审查小组进行审查，其中评估了针对建筑和操作触发器的运动。GMX910数据以每小时为平均每24小时以每小时为平均，以增强GNSS的数据稳定性，可靠性和准确性。GMX910处理的平均结果用于与ATS网络测量集成的Star*NET中，以实现所有系统的验证。

建议

一旦完成坡度监控项目，将库存工具分配给其他领域，尤其是那些面临和打击视线问题的领域，通常是由建筑计划引起的。

“我可以很容易地建议徕卡呈规则的产品。亚搏彩票手机版下载They are very transparent – I like to look into the GeoMoS system data, understand how the system operates, integrating the fine detail of observation and computation. The open access to raw data and log files was especially useful for a surveyor, so I understood how and why my system operated. I’ve used other products in the past which were supplied by 3路parties and missed that same transparency where you could drill down into specifics of measurement and the data behind it,” Crossland concludes.

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