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Ground penetrating radar adds "smart eyes" to tunnel shield tunneling machines
The shield machine, full name of the shield tunnel boring machine, is a special engineering machine for tunneling. Modern shield machines integrate optical, mechanical, electrical, hydraulic, sensing, and information technologies, and have the functions of excavating and cutting soil, transporting soil ballast, assembling tunnel lining, surveying, guiding, and correcting deviations. It involves geology, civil, mechanical, mechanical, hydraulic, electrical, control, and surveying, Moreover, it is necessary to design and manufacture according to different geological conditions, with extremely high reliability requirements. Shield tunneling machines have been widely used in tunnel projects such as subways, railways, highways, municipal engineering, and hydropower.
Difficulties in tunnel shield construction:
Tunnels are often constructed using shield tunneling, which creates a certain gap between the tunnel and the ground and is filled through grouting technology behind the wall. The filling of the gap behind the wall often occurs in an untimely or non dense manner. If not detected in a timely manner, it can lead to poor tunnel formation quality, surface settlement, and other problems during tunnel construction, as well as instability and leakage during subway operation.
The shield machine, full name of the shield tunnel boring machine, is a special engineering machine for tunneling. Modern shield machines integrate optical, mechanical, electrical, hydraulic, sensing, and information technologies, and have the functions of excavating and cutting soil, transporting soil ballast, assembling tunnel lining, surveying, guiding, and correcting deviations. It involves geology, civil, mechanical, mechanical, hydraulic, electrical, control, and surveying, Moreover, it is necessary to design and manufacture according to different geological conditions, with extremely high reliability requirements. Shield tunneling machines have been widely used in tunnel projects such as subways, railways, highways, municipal engineering, and hydropower.
Difficulties in tunnel shield construction:
Tunnels are often constructed using shield tunneling, which creates a certain gap between the tunnel and the ground and is filled through grouting technology behind the wall. The filling of the gap behind the wall often occurs in an untimely or non dense manner. If not detected in a timely manner, it can lead to poor tunnel formation quality, surface settlement, and other problems during tunnel construction, as well as instability and leakage during subway operation.
Creative combination of ground penetrating radar and shield tunneling machine. When the shield tunneling machine is moving forward, the ground penetrating radar can detect the condition of the tunnel wall in real-time. Due to the different feedback of water and concrete on electromagnetic waves, real-time scanning by the ground penetrating radar can accurately determine the composition of the medium between the pipe segment and the soil, and more accurately determine the filling situation of the grouting material behind the pipe segment. During the shield tunneling process, The synchronous grouting real-time monitoring system timely delivers the slurry to the building gap formed between the shield tunnel shell and the back of the pipe segment, so that the pipe segment detached from the shield tail can attach the slurry to the surrounding soil in a timely manner to obtain support, prevent the collapse of the soil around the pipe segment, control surface settlement, and if there are water leaks or cavities behind the wall, secondary grouting can be carried out in a timely manner, which will greatly improve construction safety and efficiency.
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