852 results about "Tunnel wall" patented technology

The invention discloses a tunnel heading-along earthquake advanced detection device taking a heading machine as an earthquake focus and a method thereof. The device comprises an earthquake detector, an earthquake focus signal receiving sensor and an earthquake wave receiving detector array, wherein the earthquake focus signal receiving sensor is arranged on the arm of the heading machine; and the earthquake wave receiving detector array is arranged on a tunnel wall. The method comprises the following steps of: continuously acquiring earthquake wave signals through a three-component sensor which is coupled on the arm of the heading machine and a three-component sensor array which is arranged on tunnel surrounding rock by taking vibration generated by cutting rock with a cutting head during working of the heading machine as a hypocenter; and recording the acquired signals for processing, and forecasting the position and structural detail of a geological anomalous body in front of a tunnel by analyzing received wave field imaging geometrical characteristics. Due to the adoption of the device and the method, the problem of oneness of an earthquake wave field of a pure explosive source in near flat ground layer tunnel advanced detection can be solved without influencing the tunnel heading work; the device has high working efficiency and high detection accuracy, and is free from safety risks; and accurate positioning of a geometrical anomalous body can be realized.

A drilling fluid composition for horizontal directional drilling is a flowable aqueous slurry of biodegradable, non-toxic, preferably edible plant particles. The particle size of the plant-derived particles depends on the drill bit used. The particles should be small enough not to clog the fluid jet orifices in normal use. The slurry is pumped through to the drill bit in a warm or preferably hot state, e.g. 80-100° C. After ejection, the slurry cools rapidly, causing solidification and creating a lining on the tunnel wall.

A luminaire for lighting a traffic surface in a tunnel is disclosed, wherein the luminaire has light sources disposed in an array for casting light on a traffic surface and structure for controlling and directing the light, such as a reflector or refractor lens. The luminaires are positioned along the length of the tunnel at angles to the traffic surface facilitating optimal use of the generated light. The luminaire is configured as a module that can be quickly installed into a support track mounted on the tunnel walls, and is dust and waterproof to endure mechanical and high pressure water cleaning by conventional tunnel washers. The luminaire is particularly well suited to employ light emitting diodes for generating and casting light.

A soft tissue fixation system, most typically applicable to orthopedic joint repairs, such as anterior cruciate ligament (ACL) knee repair procedures, comprises an implant which is placeable in a tunnel disposed in a portion of bone, wherein the tunnel is defined by walls comprised of bone. A first member is deployable outwardly to engage the tunnel walls for anchoring the implant in place in the tunnel, and a second member is deployable outwardly to engage tissue material to be fixed within the tunnel. The second member also functions to move the tissue material outwardly into contact with the tunnel walls to promote tendon-bone fixation. Extra graft length is eliminated by compression of the tendon against the bone at the aperture of the femoral tunnel, which more closely replicates the native ACL and increases graft stiffness. The inventive device provides high fixation of tendon to bone and active tendon-bone compression. Graft strength has been found to be greater than 1,000 N (Newtons), which is desirable for ACL reconstruction systems.

The invention discloses an intelligent unmanned aerial vehicle inspection system and method of a tunnel. On the basis of combination of the unmanned aerial vehicle technology and the image processing technology, the unmanned aerial vehicle is applied to tunnel inspection work. According to the invention, various sensors are added to an unmanned aerial vehicle platform; with data collected by a monocular black-and-white camera and an inertial measurement unit (IMU), precise positioning and navigation of the unmanned aerial vehicle in the tunnel are realized by means of multi-sensor data fusion according to a VINS-Mono positioning mapping algorithm; a 2D laser radar collects point cloud data to realize estimation of a tunnel wall direction and UAV obstacle avoidance; a high-resolution camera collects a tunnel image, a motion trajectory of the camera is restored based on an SfM algorithm, and a three-dimensional model of the tunnel is generated by combining a high-definition image, thereby realizing the detailed tunnel inspection task. Compared with the traditional tunnel inspection way relying on the personnel and vehicles, the intelligent unmanned aerial vehicle inspection system and method have advantages of high automation degree and high work efficiency and can be widely applied to tunnel inspection work.

The invention discloses a device and a method for carrying TBM (tunnel boring machine) seismic wave advanced prediction instruments. The device for carrying the TBM seismic wave advanced prediction instruments comprises a seismic wave excitation machine carrying device and a seismic wave detector carrying device. The seismic wave excitation machine carrying device comprises bases, and the bases are arranged on slide rails axially arranged along tunnels, are connected with first driving mechanisms and can move along the slide rails under the driving effects of the first driving mechanisms; the first driving mechanisms are connected with a controller; an excitation machine is mounted at the tail end of a mechanical arm, the other end of the mechanical arm is mounted on the bases, the bases can move along the slide rails under the driving effects of the first driving mechanisms, and accordingly excitation can be carried out on different cross sections by the excitation machine; the mechanical arm is connected with second driving mechanisms, and angles of the excitation machine and angles of tunnel walls can be adjusted by the mechanical arm under the effects of the second driving mechanisms, so that excitation effects can be guaranteed; the first driving mechanisms and the second driving mechanisms are connected with the controller.

The invention is a non-contact mine pressure observing and evaluating method, relating to a technique of monitoring and evaluating relative stress state of mine digging space or tunnel wall rock by non-contact monitoring the electromagnetic radiation information generated by loaded coal and rock, and the observing method: firstly selecting a region to be monitored, aligning the valid receiving direction of an oriented receiving electromagnetic antenna to an test point and obtaining Ei after test and testing until all test points are tested. And the evaluating method: index of mine pressure evaluation adopts average values Ei of electromagnetic radiation strengths of coal and rock, and calculating average value Eavg of all Ei; displaying the test results Ei in figure, and when the obtained electromagnetic radiation strength of a test point is higher than Eavg, the test point is evaluated as a high stress point; a region with two or more continuous test points whose electromagnetic radiation strengths are all higher than Eavg is evaluated as a high stress region; a region with two or more adjacent test points whose electromagnetic radiation strengths sharply increase by twice above or sharply decrease by above 50%, is evaluated as a high stress gradient region.

The invention discloses a tunnel arch crown detection device, which includes a geological radar, an extension mechanism and a base, wherein the geological radar is installed on the base through the extension mechanism; the extension mechanism includes a guiding rail, a guiding rail sliding block, a support rod and a driving assembly; the guiding rail is vertically arranged on the base; the support rod is installed on the guiding rail through the guiding rail sliding block in a sliding manner; the driving assembly drives the support rod to slide on the guiding rail; and the geological radar is installed at the top end of the support rod through a buffering mechanism enabling the geological radar to be elastically contacted with the tunnel wall. The tunnel arch crown detection device prevents the geological radar from being held manually by hands for detection through the additionally-arranged extension mechanism, improves the safety and stability in detection, and is suitable for tunnel detection.

In a method for lining tunnel walls or ceilings with protective nets or the like, web-shaped protective net material is unwound from a reel and is fastened to the tunnel walls or ceiling by tie bolts. The reel is rotatably arranged. The rotation of the reel about a shaft is controlled in order to unwind the protective net material, the shaft being mechanically moved in steps along the tunnel walls or ceiling together with the reel. The protective net material unwound in each step is preferably stretched and mechanically fastened. The individuals carrying out these processes are thus not exposed to any direct risk, while the lining process can be accelerated.

The invention provides a rectangular tunnel wireless propagation channel modelling method for a statistical channel model for a tunnel V2V scattering environment. A uniform linear antenna array is provided for each of a mobile transmitter and a receiver; supposing that scatters are freely distributed on a tunnel wall, and the transmitter and the receiver are located in mobile state; LOS and NLOS scattering conditions are considered in a rectangular tunnel scattering region; a 3D tunnel geometric model is analyzed to obtain a space-time frequency mutual-correlation function, a time self-correlation function and a frequency correlation function. For verifying the rationality and feasibility of the model, the theoretical parameter and a reference model are contrasted, a result shows that thetime self-correlation function and the frequency correlation function of the model conform to a reference channel model. And meanwhile, the influence on the Doppler power spectrum density and the MIMOchannel capacity by the model parameters is researched. By computing the statistical feature parameters of the rectangular channel, the tunnel V2V communication system performance is improved.