Dirt Simple Paving – From String Lines to Complete 3D Machine Control Solution

作者：理查德·戴维斯

在全球范围内，空中旅行的数量在过去70年中成倍增加。根据24航班，在一天中，超过230,000架商业航班飞行。最近的研究E. Mazareanuestimates the number of passengers travelling on scheduled flights to be over 4.72 billion in 2020; it is around 137 per cent higher than in 2004.

The United Arab Emirates (UAE) in particular is fast becoming a significant hub for air travel, with both Abu Dhabi and Dubai International Airports competing for a growing connections market. The level of infrastructure needed to support this scale of operation is substantial. It is vital that it is constructed to the highest standards and that any downtime is limited when maintenance is required.

Al Nisr, a construction company based in the UAE, is a world leader in the construction of airfields and supporting infrastructure. The company is experiencing rapid growth and believes that investing in technology is vital when competing for complex contracts, particularly those that involve the paving of runways or aprons. The company has previously been involved with major UAE projects at Abu Dhabi International Airport, Al Maktoum International Airport, Sharjah International Airport, Al Bateen Executive Airport, Al Fujairah International Airport, and many military airbases across the UAE.

From traditional string line method to complete 3D paving solution

当铺平基础设施与跑道和机场围裙一样重要时，AL NISR的目标是铺设跑道的耐受性5毫米，这意味着厚度为5 mm或更少的厚度变化，表面高度。传统上，他们利用弦线方法在铺路工作中实现了这种准确性，使用手动布置的串放入地面上，以指导放置沥青的厚度和水平。正如Al Nisr的总经理Eng。

“We were using string lines – this limited the number of trucks that could come and drop materials. Sometimes people can hit the string lines, and this causes problems. Concrete is laid at night, and the survey of the site is carried out in the morning, so if the string is hit in the evening, it delays the project until the next morning. String is also sometimes not accurate and can experience sag – this can have a negative impact on the accuracy of the surface. With string, we could originally only pave 300m lengths at a time.”

With several significant upcoming projects such as a new airfield operated by Etihad Airways in Abu Dhabi and a military airfield, Al Nisr invested in aLeica iCON Pave Concrete机器控制系统Leica Geosystems, part of亚搏苹果app, to improve their efficiency and accuracy in work. The company was already aware of Leica Geosystems’ easy-to-use solutions, as one of their engineers had used the system in the UK and was impressed with the performance, understanding that it represented a complete solution for 3D asphalt paving. In addition, Al Nisr had previously used a variety of survey solutions from Leica Geosystems, including Leica TS9 and TPS1200亚博5分钟快三, along withLeica Viva GS14GNSS智能天线。他们总是对这款调查设备的可用性和可靠性感到满意，因此投资Leica Geosystems的机器控制解决方案是有意义的。

通过无绳铺路实现高准确性

Machine control systems save time and costs for a variety of heavy construction applications and are used in paving applications to avoid dependency on string lines, making work easier for operators and contractors, while reducing costs. Stringless concrete paving also increases the consistency and quality of the finished surface.

Al Nisr购买的Leica图标铺路混凝土系统由崎，防水和防水组成Leica MCP80control panel,Leica iCR80orTS16total stations, and twoLeica MPR122360° prisms for guidance, all supported byLeica MC1软件，用于机器控制的多合一软件平台。使用该系统时，来自Al NIR的操作员发现了图形接口直观且整洁，从而使他们能够专注于手头的工作，并以所需的精度快速完成工作。Leica ConXis a cloud-based solution and web interface allowing customers to visualise and validate localised reference models, survey data and constructed data, with powerful analysis tools for monitoring and reporting site productivity. Al Nisr found this feature particularly helpful, as it allowed their chief surveyor to accurately visualise progress on site from the comfort of his office.

Before paving work began, a survey was completed using Leica GS14 GNSS smart antenna and total station solutions from Leica Geosystems.Autodesk AutoCAD Civil 3Dsoftware was used to make a model of the site, before converting into an XML file and then simply uploading it directly to the pavers.Leica iCONstruct Field Simulator被用来确保一切都在工作之前是正确的。一旦完成了铺路的部分，就可以使用Leica Geosystems GNSS设备再次进行制造的检查Leica NA2自动级别。

由于Hexagon Portfolio提供的各种软件和硬件解决方案的简单集成和互操作性，Al Nisr能够从传统的工作流程转向更连接，数字化的建筑工地。亚搏苹果app

On-going on-site support and training from Leica Geosystems

The installation of the system was supported locally by dedicated machine control staff from Leica Geosystems and their local distribution partner, GECO Engineering. Al Nisr staff needed training – Leica Geosystems staff visited and sat with the engineers and all other staff involved with the project, to ensure they were comfortable with the system. On-going support was also provided during the project.

该系统使用Gomaco GHP2800和GP2400摊铺机铺设跑道和围裙，为Al NISR提供了各种好处，效率是主要的。最初，摊铺机的每晚线性300米，但现在每晚可以执行900 m线性或每晚近2000立方米。此外，借助这项技术，测量师的作用现在更加容易，更安全。办公室中开发的铺路图案和模型可以直接上传到摊铺机上，而无需敲打任何销钉线。得益于CONX提供的可见性的提高，所有利益相关者现在都可以看待该项目，并充满信心地说，它的完成速度将比以前快得多。

The benefits of using machine control are clear to chief surveyor, Arshad Mahmood:

“Everything is nice, we really like the system! In UAE, this system helps us to lead the market – we can now look at a project and say it can be completed in a much shorter time. I would say that we see up to three times more productivity than when we use a regular system”.

通过机器控制的预期截止日期过高

Initial calculations suggested that the Abu Dhabi airfield project could take up to 12 months, yet utilising machine control from Leica Geosystems, it took six months. With large infrastructure projects such as airfields, contractors want to complete well within deadline as this allows them to avoid significant financial punishments, and move onto other jobs.

Leveraging the wide-range products and brands of Hexagon’s heavy construction portfolio, Al Nisr is proud to be the pioneer of machine control for airfields in the United Arab Emirates. The approach increases the company’s performance, improves its reputation, and helps the business win more work.