Loaded-To-Frame Detection Equipment for Backfill Grouting of Shield Tunnel

Abstract

The present invention relates to a loaded-to-frame detection equipment for backfill grouting of a shield tunnel, including an automatic loaded-to-frame transmission apparatus, a ground penetrating radar, and an intelligent backfill grouting processing and analysis software. The equipment is integrated by using software and hardware, and can implement real-time visual detection of a backfill grouting layer in a shield construction process. The loaded-to-frame automatic transmission apparatus mainly includes a track, a synchronous belt, a transmission mechanism, a servo machine, and a drive and reducer; and a new air-coupled radar detection apparatus is carried on the loaded-to-frame automatic transmission apparatus and is installed on a shield frame. With the shield performs tunneling, circular detection on a grouting body of the shield and visual layered display of the grouting body are implemented.

Claims

1. A loaded-to-frame detection equipment for backfill grouting of a shield tunnel, comprising a ground penetrating radar, a servo controller, a drive motor and reducer, a transmission mechanism, a radar acquisition box, a support, an assembly type track, a belt wheel, and a conveyor belt, wherein the assembly type track is of an arched structure, the ground penetrating radar is carried above the assembly type track through the support, and the ground penetrating radar can move back and forth along the assembly type track through the support; the transmission mechanism and the drive motor and reducer are fastened to one side of the assembly type track, the transmission mechanism is connected to the drive motor and reducer, the servo controller is fastened onto a side surface of the assembly type track, the servo controller is connected to the drive motor and reducer, and several belt wheels are fastened below the assembly type track; one end of the conveyor belt is connected to the support, the other end thereof bypasses above the assembly type track, passes the transmission mechanism, and passes through the several belt wheels in sequence, and after arriving at a bottom part of the other side of the assembly type track, the conveyor belt bypasses above the other side of the assembly type track and is connected to the support, so that the conveyor belt forms a closed loop; the radar acquisition box is fastened to the support, and the radar acquisition box is connected to the ground penetrating radar by using an coaxial cable; several shield machine assembly interfaces are disposed below the assembly type track; the loaded-to-frame detection equipment for backfill grouting of a shield tunnel is carried on a shield machine frame through the shield machine assembly interfaces; and under control of the servo controller, the transmission mechanism is driven by the drive motor and reducer, the transmission mechanism drives the conveyor belt and the belt wheel, and the conveyor belt drives, by driving the support, the ground penetrating radar to perform a circular motion.

2. The loaded-to-frame detection equipment for backfill grouting of a shield tunnel according to claim 1, wherein an antenna detection frequency of the ground penetrating radar is 300 MHz to 900 MHz.

3. The loaded-to-frame detection equipment for backfill grouting of a shield tunnel according to claim 1, wherein according to front clearance and operation requirements of a shield machine, a movement range of the ground penetrating radar can satisfy a detection requirement of 20 to 360, a motion mode of the ground penetrating radar comprises moving at a uniform speed and performing discontinuous pausing at an equal time interval, and each time a shield performs tunneling by one ring, the ground penetrating radar performs circular grouting detection of the shield.

4. The loaded-to-frame detection equipment for backfill grouting of a shield tunnel according to claim 1, wherein the radar acquisition box is connected to an operation room computer by using a network cable; and visual radar image analysis software is configured on the operation room computer for analysis to implement visual layered display of a grouting body.

5. The loaded-to-frame detection equipment for backfill grouting of a shield tunnel according to claim 1, wherein the assembly type track is formed by connecting several assembly type track sections in sequence.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 a schematic structural diagram of loaded-to-frame detection equipment for backfill grouting of a shield tunnel developed by the present invention;

[0017] FIG. 2 is a diagram of a section of an assembly type track;

[0018] FIG. 3 is a diagram of real-time processing of a radar signal by a signal processing unit by comprehensively using methods such as DEWOW (dislodge/remove weight of window), direct current removal, air layer removal, background removal and filtering, AGC/ACC (Automatic Gain Control/Automatic Chroma Control), and track equalization;

[0019] FIG. 4 is a visual display diagram of backfill grouting obtained through field detection, where (a) is an expanded view of layer thicknesses of a grouting body and a soil layer at a segment; (b) is a grouting fullness coefficient diagram (a percentage in this figure is a ratio of an actual detection thickness of a grouting body to a designed value), and (c) is a visual display diagram of backfill grouting distribution; and

[0020] FIG. 5 is a path diagram of an implementation of a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

[0021] The following further describes the present invention with reference to the accompanying drawings.

Embodiment 1

[0022] As shown in FIG. 1, an apparatus includes a ground penetrating radar 1, a servo controller 2, a drive motor and reducer 3, a transmission mechanism 4, a radar acquisition box 5, a support 6, an assembly type track 7, shield machine assembly interfaces 8, a belt wheel 9, and a conveyor belt 10. The ground penetrating radar 1 is connected to the conveyor belt 10 by using a support plate, the conveyor belt performs a circular motion through traction by the drive motor and reducer 3 and the transmission mechanism 4, and a motion mode thereof is controlled by the servo controller 2. The ground penetrating radar 1 obtains a radar signal and transmits the radar signal to the radar acquisition box 5 by using a coaxial cable, and transmits, preferably by using a network cable, the radar signal to an operation room computer to perform data analysis.

[0023] FIG. 2 is a diagram of a section of an assembly type track according to the present invention. A number of phases required for the section of the assembly type track are calculated according to a requirement of an actual detection angle. The assembly type track 7 is formed by connecting several assembly type track sections in sequence.

[0024] Referring to FIG. 5, in the present invention, a circular detection angle is first determined according to a detection requirement and operating space of a shield, and the angle is preferably controlled between 20 to 360. The number of required sections is calculated according to a requirement of an actual detection angle and a length of the assembly section shown in FIG. 2, and field assembly is performed to form integrated equipment shown in FIG. 1. After the assembly is completed, the integrated equipment shown in FIG. 1 is carried on a shield machine frame through shield machine assembly interfaces 8, to form an integrated equipment.

[0025] The equipment may move following a shield after being integrated, and performs circular detection on each segment. In a detection process, a radar acquisition box 5 collects radar data and sends the radar data back to an operation room computer in real time, preferably by using a network cable. Real-time processing is performed on a radar signal in real time by a signal processing module shown in FIG. 3 by comprehensively using methods such as DEWOW (dislodge/remove weight of window), direct current removal, air layer removal, background removal and filtering, AGC/ACC (Automatic Gain Control/Automatic Chroma Control), and track equalization), so as to obtain a visual diagram of a grouting layer as shown in FIG. 4, where (a) is an expanded view of layer thicknesses of a grouting body and a soil layer at a segment; (b) is a grouting fullness coefficient diagram (a percentage in this figure is a ratio of an actual detection thickness of a grouting body to a designed value), and (c) is a visual display diagram of backfill grouting distribution.

TABLE-US-00001 PARTS LIST 1 ground penetrating radar 2 servo controller 3 drive motor and reducer 4 transmission mechanism 5 radar acquisition box 6 support 7 assembly type track 8 shield machine assembly interface 9 belt wheel 10 conveyor belt