Precisely milled substrate as a basis for safe, durable streets

Author: Ilona Bihlmayer

The civil engineering and road construction sector is facing ever more challenges. When it comes to motorway construction, public authorities require shorter build times to keep traffic jams and congestion to a minimum. Other challenges include the increasing number of heavy good vehicles due to the international movement of goods, increasing commuter traffic, the general increase in the number of individual cars on the road, and the size and weight of those cars.

For all these reasons, companies in the civil engineering and road construction sector need to be especially diligent to ensure roads are safer and more hard-wearing, and that they last longer. The planning parameters and target values for roads given by those who commission the builds should, in theory, guarantee the optimal run-off of surface water, good distribution of loads, and durability.

Roads that are tougher and safer thanks to digital measurement solutions

Using digital measurement solutions in road construction helps to transfer these target values into precise actual values on the ground. For this reason, Mr Stahl, head of the surveying department at LEONHARD WEISS decided to use a digital solution from Leica Geosystems for the milling work on the renovation of the superstructure of the German A70 autobahn (BAB A70), to speed up the work and ensure it is precise.

For this project, the state of Bavaria, through the North Bavarian Motorway department, has provided the planning data and the target values to the construction company in a design guide. When it comes to renovating a road, milling off the existing surface layer is an important step. An accurately milled substrate is a prerequisite for delivering the planed asphalt base layer as detailed in the design guide with precise cross slopes and gradients.

Digitisation should increase efficiency and precision without impeding progress

Stahl先生解释说：“该项目的目的是使用3D配置文件铣​​削来创建一个完全正确的配置文件的基础，然后我们可以继续进行。”他需要一个“准备快速使用的系统，以免施工过程停滞不前”。

When selecting a measurement system for the team and Stefan Stahl, easy-of-use and minimal effort required in upgrading the milling machine were also important factors.

The entry-level, GNSS-supported milling solution from Leica Geosystems met all those requirements and so Stahl opted for the Leica iCON site Milling Pilot.

As LEONHARD WEISS was already using the Leica iCON iCG70 and iCG60 construction rovers, the CC80 construction controller, and the iCON site-field software, introducing the Milling Pilot System was seamless. The iCON site software, developed specifically for positioning tasks in the construction industry and which runs on all Leica iCON-GNSS hardware, was particularly helpful here.

“我们的团队发现操作铣削飞行员很容易。该软件是直观的，铣削过程以图形方式显示，它帮助我们准确地设置了铣削深度。” Stahl强调。整个铣削团队都需要对系统进行简短的现场介绍，以便能够使用该系统。

An all-round digital solution for civil engineering and road construction

Projects like these are increasingly being handled digitally. In this case, the existing site was surveyed digitally by an engineering firm and the data was then transferred into the iCON software.

然后将设计指南中的目标值加载到软件中，并计算出需要铣削的截面。沿着道路的主要设定点上的目标和跨斜率值的2步预览实现了一致的铣削，没有不平衡。

The software’s visualisation function meant that the error-prone spray-on marking process was not necessary and it saved time and costs compared to the manual preparation process. In road construction, costs are also incurred when additional layers need to be applied if the milling has gone too deep. This is also avoided by the increased precision the system provides.

Simple installation

The iCON site Milling Pilot simply requires an iCON-GNSS smart antenna, a CC80 controller and the relevant software. Positioned on the top of the milling machine, the antenna, in this case the iCON gps 70 T, sends GNSS correction data to the controller. This data is displayed graphically by the software.

Impressive service and support from Leica Geosystems

Initially the LEONHARD WEISS team rented the system to see if it was the right solution for them. Shortly afterwards, they invested in a system of their own. “During the testing phase and with the installation of our own system, the service and support we received from the Leica Geosystems team in Germany was immensely helpful,” says Stahl.

Stahl went on to say that, “the Leica Geosystems team set up an individual installation just for us whereby the system was powered with electricity directly from the machine so there would be no need to charge batteries.”

As a long-standing customer of Leica Geosystems, Stahl knows he can rely on Leica Geosystems for support with a wide range of projects and, in conclusion, said that “he would recommend the iCON site Milling Pilot without hesitation for its precision and ease-of-use. This, and all the other systems from Leica Geosystems that I have used, makes work on the building site easier every day. The Leica service team is always there to answer our questions and help us optimise our processes.”

在很短的时间内，Leonhard Weiss Gmbh＆Co。KG的整个铣削团队都熟悉操作Icon网站磨坊飞行员。

The iCG70T is impressive, not just as a construction site rover with precise GNSS data, but also on top of a milling machine.

2步预览可实现精确的铣削结果，而无需不平衡

The Leica iCON CC80 controller uses the iCON site software to graphically display the milling depths prescribed.