Cutterhead-built-in focusing type electrical method water detection system and method carried on shield tunneling machine

Abstract

The invention discloses a cutterhead-built-in focusing type electrical method water detection system and method carried on a shield tunneling machine. The system comprises an electrode system, an electrode telescopic device and an induced polarization detection instrument, pressure sensors are installed at the front end of the electrode telescopic device and the tail portion of the electrode system, in the testing process, the attachment situation of the electrode system and a soil layer is indirectly reflected according to the numerical value of pressure, after it is determined that the contact state of a measuring electrode and a power supply electrode is good, induced polarization parameter data are collected, and a water disaster source occurring in front of a shield tunneling machineis explored in real time. According to the cutterhead-built-in focusing type electrical method water detection system and carried on the shield tunneling machine, carrying integration of the shield tunneling machine and the induced polarization advanced detection instrument is achieved, shield construction is not interfered, and the automation degree is high.

Description

technical field [0001] The invention belongs to the field of geophysical detection, and in particular relates to a system and method of electric water detection with a built-in focusing type mounted on the cutter head of a shield machine. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In the construction of subway tunnels, the construction of shield method accounts for a large proportion in most cities. Most cities in my country are built on alluvial plains, and most of the soil tunnels. Some cities have relatively complex karst areas, rich Poor geology such as water layers, and most of them are built in downtown areas, which have strict requirements on the formation deformation and the protection of existing facilities. When the shield tunneling passes through the karst cave development area, it is easy to cause the shield machine to fal...

AI Technical Summary

Problems solved by technology

Ground detection is greatly affected by various interferences, such as vibration, electromagnetic interference, etc. For example, before the start of the Beijing subway, the ground radar method is required to scan holes, the distance between the measuring lines is 4m, and the detection depth is basically above 6m. The actual excavation of the tunnel is in Below 10m, this detection method is not very helpful for tunnel construction, and the space between the cutter head and the tunnel face is narrow, so the traditional forecasting method has no room for display, and less data can be obtained

[0005] The geological conditions in front of the subway construction are difficult to solve through ground exploration and traditional geological forecasting methods, and there are very few data available, which makes the construction have a lot of unknowns. Only the driver's experience and design drawings can be used to judge the ahead. Geological conditions are far from enough and also increase the risk of construction

This kind of unknown has caused the consumption of manpower and material resources, increased the cost, delayed the construction period, and even caused immeasurable losses to the surrounding personnel and buildings.

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