264 results about "Tunnel wall" patented technology

The invention provides a method for monitoring cracks in a high-pressure vibration state of a wind tunnel in real time, and belongs to the technical field of wind tunnels. A piezoelectric ceramic sensor array is arranged on the wall surface of the wind tunnel, a vibration fatigue matrix and a structure resonance matrix are established, and a self-adaptive filtering algorithm is adopted to preprocess sensor signals; establishing a vibration coupling equation set to extract crack characteristic parameters, constructing a dynamic threshold discrimination matrix and a risk assessment matrix, utilizing a multi-sensor data fusion algorithm to accurately position crack positions and sizes, calculating risk levels according to a crack risk assessment index equation, and performing three-level safety discrimination. A complete crack real-time monitoring and risk assessment system in the high-pressure vibration environment is formed, and the technical problems that in the prior art, crack monitoring precision is low in the high-pressure vibration environment, and real-time risk assessment cannot be achieved are solved.

The invention discloses a method and a device for correcting hole wall interference after wing type stall of a high-lift rotor wing and a medium, and belongs to the field of wing type wind tunnel test data correction. The method is based on a single-parameter linearization wall pressure information method, and upper and lower tunnel wall pressure and airfoil aerodynamic force data in a wind tunnel test are measured; obtaining a vorticity field through numerical simulation or a PIV test, identifying a separation vortex, and calculating a vorticity center of the separation vortex to determine a vortex core center position; a source is arranged in the center of the vortex core of each separation vortex, and the intensity of the source is the same as or integral multiple of the vorticity; the original singular point distribution is kept unchanged, and the influence of the superposition source realizes hole wall interference correction after stall, so that the corrected lift force, resistance and pitching moment coefficients are obtained. The method is suitable for a rotor wing type wind tunnel test with the incoming flow Mach number ranging from 0.1 Ma to 0.9 Ma, the aerodynamic data correction accuracy can be improved after stall, and the correction result is highly consistent with reference data.

The invention relates to the technical field of tunnel and underground engineering safety construction, in particular to a deeply-buried hard rock tunnel micro-seismic monitoring and segmented advanced blasting collaborative pressure relief method which comprises the steps that a pre-constructed micro-seismic monitoring system is arranged along the tunnel wall so as to collect and analyze seismic source parameters of a micro-seismic event; whether a preset early warning threshold value is exceeded is judged according to the judgment result; if yes, segmented advanced blasting pressure relief design is carried out based on the seismic source parameters of the micro-seismic event, so that blasting parameters are obtained; according to the blasting parameters, drilling wall protection and charging blasting are conducted on the tunnel hole wall, so that the blasted tunnel hole wall is obtained; the current surrounding rock response of the tunnel wall after blasting is observed, whether the current surrounding rock response exceeds a preset early warning threshold value or not is judged, if yes, it is judged that pressure relief is effective and tunneling is normal, and if not, blasting parameters are adjusted or pressure relief is supplemented in the next cycle. Therefore, the problems of passive rock burst risk early warning, poor pressure relief effect, extensive parameter control and the like under the high ground stress condition in drilling and blasting method construction of the deeply-buried hard rock tunnel are solved.

To provide a centering device capable of suppressing the detachment of an outer peripheral end member fixed to the outer peripheral surface of an end plate even when the setting and demolding of the end plate are repeated.SOLUTION: The arch center includes a diameter-expandable form 11 and an end plate unit 13 for closing a working face side with respect to a concrete placing space 502. The end plate unit 13 has an end plate 131, a hydraulic cylinder 133 attached to the end plate 131, an outer peripheral end member 137 inserted between the tunnel wall surface 501 and the outer peripheral surface of the end plate 131, and a support member 136 fixed to the outer peripheral surface of the end plate 131 and supporting the outer peripheral end member 137 from the concrete placing space 502 side.SELECTED DRAWING: Figure 2

This utility model relates to the field of tunnel lighting control technology, and more particularly to a wireless safety tunnel lighting controller. It includes a tunnel wall panel with an inner cavity groove on its surface. The controller body is mounted on the inner wall of the inner cavity groove. An adjustment device is provided on the bottom surface of the inner wall groove corresponding to the controller body. The adjustment device includes two fixed rods and a connecting plate. Both ends of the two fixed rods are fixedly connected to the bottom surface of the inner wall groove. Both ends of the connecting plate are rotatably connected to pulleys, and the arc surfaces of the pulleys are slidably connected to the arc surfaces of the fixed rods. A connecting rod is fixedly connected to the upper surface of the connecting plate, and a fixing frame is inserted into the surface of the connecting rod. The inner wall of the fixing frame is engaged with the surface of the controller body. This utility model provides a wireless safety tunnel lighting controller with the advantage of conveniently adjusting and limiting the position of the lighting controller within the tunnel.

The invention belongs to the technical field of steel bar conveying equipment, and particularly relates to a tunnel wall ring bar conveying trolley based on a chain type mechanical arm. According to the tunnel wall ring rib conveying trolley based on the chain type mechanical arm, the supporting trolley can be used for supporting the mechanical arm body, the tail section of the mechanical arm body can move into an inner ring of a ring rib manufactured by a ring rib forming machine, the ring rib is hooked by the hook by driving the conveying chain to act, and limiting and fixing of the ring rib are achieved; and then the mechanical arm body is controlled to act, the annular ribs on the mechanical arm body are conveyed to the designated position to be fixed, manual conveying of the annular ribs is replaced, the labor intensity and potential safety hazards during annular rib conveying are reduced, and the arrangement efficiency of the annular ribs is improved.

The utility model discloses an annular reinforcing steel bar laying frame for tunnel construction, which is suitable for a tunnel with a ditch formed at the edge of a bottom plate, and comprises a plurality of roller frames which are arranged at intervals along the length direction of the tunnel and are used for supporting annular reinforcing steel bars, one end of the roller frame is placed on the surface of the bottom plate, and the other end of the roller frame abuts against the tunnel wall. According to the circumferential reinforcing steel bar laying frame for tunnel construction, the roller frames arranged in the length direction of the tunnel at intervals are adopted for supporting the circumferential reinforcing steel bars, and due to the fact that the roller frames are arranged at intervals, the contact area between the circumferential reinforcing steel bars and the roller frames is smaller than the contact area between the circumferential reinforcing steel bars and the tunnel ground when the circumferential reinforcing steel bars are directly placed on the tunnel ground; therefore, friction force borne by the circumferential steel bars in the dragging process can be effectively reduced, swing is reduced, and meanwhile the requirement for traction force of tunnel reinforcement cage operation equipment is lowered.

The invention relates to the technical field of tunnel supporting, and discloses a crawler-type tunnel wall mold spraying device for an open-type TBM. The technical problems that in the prior art, concrete supporting time is too long, rocks deform greatly under the action of gravity, a TBM is stuck, and the construction period is delayed and economic losses are caused are solved. The mechanical arm comprises a center rotating assembly and a mechanical arm body. The center rotating assembly drives the mechanical arm to rotate; concrete spraying equipment is installed at the tail end of the mechanical arm, the mechanical arm drives the concrete spraying equipment to move to the to-be-operated position of the tunnel wall, and crawler-type formworks are installed on the mechanical arm and the position of a guniting opening of the concrete spraying equipment. Concrete spraying equipment can extend to the proper position of the tunnel wall to spray concrete, and the multiple nozzles can greatly improve the concrete spraying speed; and the crawler-type template of the mold spraying device slowly rolls over the surface of the concrete to solidify the concrete, so that a smaller flatness error of the surface of the concrete is ensured.

The application discloses a tunnel wall inspection equipment, comprising a vehicle body, a vertical frame vertically arranged on the vehicle body, and a plurality of inspection units arranged on the vertical frame in the height direction, each of the inspection units comprising a visual inspection module and a touch inspection module, and the visual inspection module and the touch inspection module are used for respectively performing visual and tactile inspection on the tunnel wall. The visual inspection module and the touch inspection module are integrated, audio and image information can be collected at the same time, and the audio and the video image can be analyzed in the later period, so that the structural integrity and the safety of the tunnel can be evaluated.

The application discloses a tunnel wall vibration prediction method and system considering line alignment constraint conditions, and is based on a constructed vehicle-line coupling dynamics, train-track-tunnel (soil body) system vibration integrated analysis model, studies the influence degree of different line parameters such as curve radius, line slope and combinations thereof on the system vibration response, obtains tunnel wall vibration acceleration data in the evaluation section, and further calculates the tunnel wall Z vibration level; based on the probability density distribution and numerical fitting method, the influence function relationship of different line parameters on the tunnel wall vibration level is derived. The application fully considers the objective problem that the influence factors of the existing environmental impact assessment prediction method are not comprehensive, quantifies the corresponding coupling relationship between the line parameters and the tunnel wall Z vibration level, can more systematically determine the prediction and evaluation results of the urban rail transit vehicle-induced tunnel wall vibration, and provides a theoretical basis and an engineering applicable method for realizing tunnel structure vibration prediction and line design optimization.

This utility model discloses a tunnel support structure, belonging to the field of tunnel support technology. It includes a support frame, with a concrete layer filling the space between the support frame and the tunnel wall. The support frame comprises multiple arc-shaped top plates connected by bolts, with L-shaped support plates bolted to both ends of each arc-shaped top plate. Multiple anchor bolts fixed to the tunnel are installed on the support plates, and a bottom plate is bolted between two support plates. This utility model, through the support frame and concrete layer, ensures sufficient support strength by using a precast support frame made of steel reinforcement and concrete. The concrete layer fills the gap between the support frame and the tunnel wall, preventing collapse. The support frame is assembled from multiple arc-shaped top plates, support plates, and a bottom plate, facilitating transportation and installation. All arc-shaped top plates, support plates, and bottom plates are precast, ensuring uniform quality and stable structural strength. The anchor bolts further enhance the stability of the support frame.

The present application relates to the technical field of railway contact network, especially relates to a kind of erecting device for railway contact network suspension column, to solve the problem of column and wall damage caused by column easy to sway and easy to collide with tunnel wall when installing suspension column currently.The present application provides a kind of erecting device for railway contact network suspension column, including moving device and stabilizing device;Moving device includes pressurized arc plate, horizontal slide plate, segmented force arm and heavy base;The inner wall of pressurized arc plate is in contact with the outer wall of preset suspension column, pressurized arc plate is connected with segmented force arm by horizontal slide plate, pressurized arc plate can move horizontally relative to segmented force arm, so that two pressurized arc plates clamp preset suspension column;Heavy base is slidably connected with guide slide rod on top, guide slide rod can move in vertical direction, to drive segmented force arm to move;Stabilizing device is arranged below pressurized arc plate, for supporting preset suspension column.

The invention provides a controllable deformation drawing anchor rod and a setting method thereof, and belongs to the technical field of tunnel construction. The controllable deformation pulling anchor rod comprises an anchor rod, at least two grouting parts and an anchor head, a main rod of the anchor rod is located on the side, away from a hole wall, of a telescopic rod, one end of the telescopic rod is nested with the main rod, the other end of the telescopic rod is located on the hole wall and connected with the anchor head, and a first stop-grouting plug of the first grouting part is located in the main rod and connected with the inner wall of the main rod; one end of the first grouting pipe is located on the side, away from the anchor head, of the first stop-grouting plug, a second stop-grouting plug of the second grouting part is connected with the telescopic rod and located on the side, close to the anchor head, of one second through hole, and one end of the second grouting pipe is located on the side, away from the anchor head, of the second stop-grouting plug. The telescopic rod can move in the direction away from the main rod relative to the main rod under the deformation, the anchor rod is continuously reinforced through the deformation of the anchor rod and multiple times of segmented grouting, a plurality of anchoring bodies are formed, and the effect of improving the fixing effect of the controllable deformation pulling anchor rod is achieved.

This invention discloses a device and method for detecting the flow properties of grout injected behind the tunnel wall, relating to the field of new material testing. In this invention, a tunnel boring machine (TBM) is simulated in tunnel construction using a TBM propulsion simulation system. Transparent soil grout containing tracer particles is injected into the grouting gap between a tunnel wall model and a segment model using a grouting device. Both the tunnel wall model and the segment model are made of transparent material. A laser emitter then emits a laser beam into the grouting gap. When the laser beam hits the transparent soil grout, the tracer particles within the grout scatter the laser beam. An axial visual detection unit and a radial visual detection unit respectively track the scattered laser beam from the radial and axial directions of the tunnel wall model. By coordinating the laser emitter, axial visual detection unit, and radial visual detection unit, the tracer particles are tracked, and the flow direction and flowability of the transparent soil grout are determined by the flow of the tracer particles.

The utility model discloses a high-pressure karst water-rich large section highway tunnel drainage and pressure reduction device, which comprises pressure reduction assemblies arranged along the axis of the tunnel in a mirroring manner and a drainage unit communicated with the two pressure reduction assemblies, the drainage unit is used for draining flowing water generated by the two pressure reduction assemblies, and each pressure reduction assembly comprises a pressure control unit, a pressure control unit and a pressure control unit, the pressure control unit comprises a gravel blind ditch arranged at the position of a tunnel wall foot and extending in the direction away from the axis of the tunnel and a water gathering pipe arranged in the gravel blind ditch. The end, close to the tunnel, of the water gathering pipe is connected with a water pressure valve. The stabilizing unit comprises a plurality of positioning ribs evenly distributed on the peripheral side of the water pressure valve and a plurality of obliquely-arranged locking anchor rods, and the ends, away from the water pressure valve, of the positioning ribs and the ends, away from the water pressure valve, of the locking anchor rods are deeply buried in the rock stratum through concrete; water pressure can be released intelligently according to the water pressure condition, drainage is started automatically when the water pressure reaches a certain degree, the threat of the water pressure in a rock stratum to a tunnel lining structure is effectively reduced, and the lining structure is prevented from being broken down and damaged due to too high water pressure.

The invention discloses a rail transit 5G Massive MIMO conformal antenna based on a holographic metasurface and a beam regulation and control method of the rail transit 5G Massive MIMO conformal antenna, and belongs to the technical field of wireless communication. The conformal antenna comprises a flexible dielectric substrate, a holographic metasurface unit array, an impedance matching layer, an active feed network and an intelligent control system. The beam regulation and control method comprises a hologram calculation step, a dynamic beam forming step and a multi-mode vortex beam generation step. Conformal deployment of the antenna, the tunnel inner wall, a train body and other complex curved surfaces is achieved through the holographic metasurface technology, the intelligent beam regulation and control algorithm is utilized to adapt to the rail transit fast time-varying channel environment, the problems that a traditional antenna is limited in form and too high in energy consumption are effectively solved, and meanwhile high-capacity, low-power-consumption and high-safety wireless communication is achieved.

The utility model discloses a tunnel trolley maintenance spraying device which comprises a trolley door frame and a spraying pipe fitting and further comprises a lifting base and a pushing mechanism, the spraying pipe fitting comprises a first water supply hose, a top arch plate and two side arch plates, the two side arch plates are movably installed at the two ends of the top arch plate in a hinged mode respectively, the top arch plate is fixedly installed at the upper end of the lifting base, and the top arch plate is fixedly installed at the lower end of the lifting base. Hydraulic rods are movably hinged to the two sides of the lifting base, piston shafts of the hydraulic rods are movably hinged to the side arch plates at the corresponding positions, and the pushing mechanism is installed on the trolley portal. When the trolley portal encounters a narrow section, the spraying pipe fitting can be controlled to descend through the lead screw motor, then the hydraulic rod is started to rotate the two side arch plates towards the position of the lifting seat, and the whole spraying pipe fitting can be folded at the moment, so that the trolley portal can conveniently pass through the narrow section, collision between the spraying pipe fitting and a tunnel wall is avoided, and the service life of the spraying pipe fitting is prolonged; when tunnels with different heights need to be sprayed, the height of the spraying pipe fitting can be accurately controlled through the lead screw motor, and therefore the spraying requirement is met.

The application discloses a device and method capable of realizing all-around real-time monitoring of tunnel structure deformation. The device comprises multiple non-contact displacement sensors, a rotating support assembly, a three-dimensional space locator assembly, an inclination sensor and a control unit. The multiple non-contact displacement sensors are equidistantly arranged along tunnel walls on the same cross section of the tunnel and are fixed through the rotating support assembly; the rotating support assembly can realize scanning measurement along the cross section and the longitudinal direction of the tunnel. The three-dimensional space locator assembly is used for monitoring the position change of the base point of the sensor, the inclination sensor is used for accurately controlling the scanning angle of the first rotating assembly, and the control unit is responsible for coordinated control and data processing. The application integrates automatic scanning, multiple sensor data mutual verification, environmental compensation and remote monitoring functions, can realize real-time, continuous and accurate monitoring of various deformation parameters such as tunnel ellipticity, segment misalignment and cross section convergence, significantly improves the monitoring efficiency and precision, and guarantees the tunnel operation safety.

The utility model discloses a tunnel support structure for tunnel construction, including setting on the tunnel wall reinforced frame, the reinforced frame is by multiple longitudinal reinforcement, multiple horizontal reinforcement is composed, multiple longitudinal reinforcement and multiple horizontal reinforcement crisscross with tunnel wall and is pasted, the surface of reinforced frame has poured multiple groups of concrete, and multiple groups of concrete between setting have support mechanism, through the reinforcing mechanism of design, makes the tunnel support structure in the construction process, and installs reinforcing mechanism in the tunnel ground simultaneously, and is fixed with reinforced frame and links up, and reinforcing mechanism increases the contact area of reinforced frame and soft ground, and soft bottom layer can bear greater load, prevents reinforced frame from sinking into the bottom layer, and reinforcing mechanism can make reinforced frame stress more evenly, reduces the risk of inclination or displacement caused by local excessive stress, maintains the stability of the whole tunnel support structure whole.

The invention relates to the technical field of tunnel construction, in particular to tunnel construction grouting equipment which comprises a base and further comprises a drilling and grouting integrated structure connected with the base, the drilling and grouting integrated structure comprises a deviation moving mechanism, the deviation moving mechanism is connected with a clamping rotating mechanism, the clamping rotating mechanism is connected with a set of drilling and grouting pieces, and each drilling and grouting piece comprises a multilateral groove sleeve. The polygonal groove sleeve is connected with an outer sleeve, the outer sleeve is connected with a stepped plug, the outer sleeve is connected with a plurality of groups of metal insertion pieces, the outer sleeve is slidably connected with a hollow pipe, the hollow pipe is fixedly connected with an annular groove sleeve through a butt joint pipe, and the hollow pipe is connected with a tool bit through a hollow conical extrusion head; and the grouting and reloading structure is connected with the base. Through cooperation of the drilling and grouting integrated structure and the grouting and material changing structure, the stability and the sealing performance of installation of the drilling and grouting piece are improved, drilling and grouting operation on the tunnel wall can be completed through one-time clamping, and additional dismounting and replacing operation is reduced.

The invention discloses a safety protection device for tunnel blasting, and relates to the field of technical building construction. The device comprises a base body and a driving assembly, a blocking assembly is arranged on the surface of the base body, the driving assembly is in transmission connection with a self-adaption assembly and an axial driving assembly, a spraying assembly is arranged on the surface of the blocking assembly, and the blocking assembly comprises a first blocking plate and second blocking plates hinged to the two sides of the first blocking plate correspondingly; the first blocking plate and the two sets of second blocking plates are each provided with a sliding blocking piece in a sliding mode. Through linkage of the driving assembly, the self-adaption assembly and the overturning assembly, the opening angle of the two second blocking plates can be automatically adjusted, the second blocking plates are made to be tightly attached to the tunnel inner walls with different widths, sliding sleeves and supporting columns in the self-adaption assembly are matched with elastic supporting pieces, stroke compensation and buffering can be achieved after the second blocking plates make contact with the tunnel walls, and the working efficiency is improved. And it is ensured that the device can reliably adapt to tunnel entrances with various section sizes.

The utility model discloses a D-shaped plugging structure for a shield tunnel, which relates to the technical field of shield tunnel plugging, and comprises a D-shaped reinforcing plate, a mounting mechanism arranged on the outer wall of the D-shaped reinforcing plate and used for mounting the whole structure, and a sealing connecting mechanism arranged on the inner side of the D-shaped reinforcing plate and used for sealing the whole structure. The D-shaped plugging structure for the shield tunnel is used for being connected with injection molding pipe fittings in a sealed mode, the installation mechanism comprises a sealing plate, the D-shaped plugging structure for the shield tunnel is provided with the installation mechanism, a structure convenient to install is generally designed through a fixing assembly in the installation mechanism, and the D-shaped plugging structure can be rapidly and accurately installed in place in the tunnel; and meanwhile, the fixing assembly can ensure that the D-shaped plugging structure is tightly attached to the tunnel wall, gaps between the plugging structure and the tunnel wall are reduced, and therefore the sealing performance of the plugging structure is improved, and underground water, soil particles and the like are prevented from leaking into the tunnel through the gaps.

The invention discloses a lining drainage structure of a hydraulic pressure tunnel and a construction method of the lining drainage structure. The drainage structure comprises double-layer permeable template cloth which is arranged between a primary support layer and a secondary lining layer of a tunnel wall; wherein the outer-layer water-permeable template cloth water-permeable layer is fixed and attached to the surface of the primary support layer; the inner-layer permeable template cloth permeable layer is fixed and attached to the surface of the secondary lining layer, and the inner-layer permeable template cloth filter layer and the outer-layer permeable template cloth filter layer are attached to each other; air holes which are permeable to water and air and are not permeable to slurry are formed in the outer-layer permeable template cloth permeable layer and the inner-layer permeable template cloth permeable layer in a penetrating manner; the outer-layer water-permeable template cloth filter layer and the inner-layer water-permeable template cloth filter layer are respectively of a fluffy structure with water retention and air permeability; a drainage pipe leading to the outer side of the tunnel is embedded in the wall of the tunnel, and an orifice of the drainage pipe is formed in the drainage hole. High-pressure underground water can be collected to other drainage holes through the drainage cushion layer and then is finally drained.

This application discloses a method and system for sensing rock strength in TBM tunnels (tunnels) based on the IPAN-EfficientNet network. The method includes: acquiring images of rock debris from the TBM tunnel (tunnel) and corresponding rebound strength data of the rock in the tunnel wall; establishing a rock debris image-rock strength level dataset; obtaining top-ranked indicators; constructing an IPAN-EfficientNet network; training the IPAN-EfficientNet network using the rock debris image-rock strength level dataset to obtain a rock strength level sensing model; and using the rock strength level sensing model to identify rock debris images, thereby achieving rock strength level sensing in the TBM tunnel (tunnel). The method described in this application achieves accurate sensing of rock strength at the TBM tunnel (tunnel) face, providing more scientific guidance for disaster early warning and tunneling support optimization during TBM tunnel (tunnel) construction, and ensuring TBM safety.

The invention relates to the technical field of tunnel detection equipment, and discloses a folding tunnel intelligent comprehensive detection platform which comprises a folding support module installed on a transport vehicle, the folding support module comprises a damping base installed at the top end of a vehicle body, and a supporting seat is arranged in the middle of the top end of the damping base. A plurality of telescopic rods are arranged along the outer side of the supporting seat at intervals, folding arms are hinged to the ends, away from the supporting seat, of the telescopic rods, and every two folding arms are connected through a joint. Stable scanning of the tunnel wall by the detection device is realized, and the effects of reducing space occupation and improving detection efficiency and safety are achieved.

The utility model discloses a tunnel foldable walkway plate, and relates to the technical field of shield tunneling machine corollary equipment, the tunnel foldable walkway plate comprises a main body plate and an extension plate, at least part of the main body plate is used for being arranged between a rear corollary trolley and a tunnel wall, and the main body plate is used for being connected with the rear corollary trolley; the extension plate is hinged to the main body plate, the included angle between a hinge shaft of the extension plate and the main body plate and the length direction of the rear matched trolley is smaller than 10 degrees, the extension plate has two states, one state is a folded state, the other state is an unfolded state, and the included angle between the extension plate in the folded state and the main body plate is smaller than 90 degrees; and the included angle between the extension plate in the unfolded state and the main body plate is greater than 90 degrees. The extension plate has the folded state and the unfolded state, the extension plate in the unfolded state can shield the gap between the main body plate and the tunnel wall, then the safety is improved, the extension plate in the folded state can reduce the size of the walkway plate in the width direction, and then the trafficability is improved.

The utility model relates to a detachable arc-shaped tunnel wall surface spraying device, and belongs to the technical field of spraying mechanisms. Comprising a rack, a walking mechanism, a swing arm power mechanism, a telescopic swing arm, a spray gun support, a spraying mechanism, a console and a power supply and distribution mechanism. Wherein the walking mechanism is installed at the bottom of the rack, the spray gun support is movably installed at the top of the telescopic swing arm, a spray gun on the spray gun support is connected with the spraying mechanism through a pipeline, and the swing arm power mechanism drives the telescopic swing arm to swing in a reciprocating mode with a connecting shaft as the axis and drives the spray gun to do arc-shaped motion to conduct reciprocating spraying on the arc-shaped wall face of a tunnel. According to the device, slurry can be uniformly sprayed on the arc-shaped inner wall of a tunnel, reciprocating spraying of an arc-shaped surface layer can be achieved, the device can adapt to continuous spraying operation of a large space and an arc-shaped surface, the spraying effect is good, the efficiency is high, meanwhile, the whole device can walk on the arc-shaped surface, and the dust filtering function is achieved.

The invention relates to the technical field of building materials, in particular to an energy-saving and noise-reducing composite material and a preparation method and application thereof. The energy-saving and noise-reducing composite material comprises a reflective layer and a matrix layer which are tightly jointed, the base body layer is formed by pressing and curing a base body material; the base material is composed of aggregate with the particle size of 1-3 mm, aggregate with the particle size of 3-5 mm and wollastonite mineral fibers with the length of 2-4 mm. The reflective layer is formed by curing a reflective material; the reflective material is composed of quartz sand with the particle size of 0.1-0.3 mm, pearl powder with the particle size of 50-100 [mu] m and glass bead powder with the particle size of 100-150 [mu] m. The composite material is provided with irregular-aperture through holes with the aperture covering 0.2-1 mm. The invention also discloses a preparation method and application of the energy-saving and noise-reducing composite The technical problems of tunnel closed reverberation noise reduction and illumination energy saving are solved, the high diffuse reflection rate and reverberation noise reduction of a tunnel wall material are cooperatively achieved, and the comfort and safety of a tunnel closed space are improved.

The invention provides a numerical simulation method for fluid-structure interaction vibration of wind tunnel airflow and a tunnel wall structure, and belongs to the technical field of wind tunnels. Geometric parameters of a wind tunnel section are obtained, a multi-layer grid sequence is established, an implicit Runge-Kutta format and an explicit Newmak method are adopted to solve a flow field and a structure field respectively, and the wind tunnel airflow and tunnel wall structure fluid-structure interaction vibration is obtained. Mesh deformation is realized by using tightly-supported radial basis function interpolation, a volume conservation constraint is introduced, an interface projection matrix is constructed based on a virtual work equivalence principle to transmit interface data, a force balance and displacement coordination constraint is introduced, and coupling iteration convergence is accelerated through an inverse Broyden formula. A density gradient shock wave sensor is adopted to drive grid adaptive encryption and a mixed indicator function to control turbulence model switching, and the technical problems that wind tunnel section airflow and wall surface structure fluid-structure interaction vibration numerical simulation calculation is low in efficiency and insufficient in precision are solved.

The utility model provides a tunnel boring machine (TBM) turning supporting device for a mine roadway, which relates to the field of tunnel construction equipment and comprises a fixing mechanism and a supporting mechanism, the supporting mechanism comprises a gripper shoe pre-tightening assembly and a tunnel wall supporting assembly, the gripper shoe pre-tightening assembly and the tunnel wall supporting assembly are arranged on two sides of the fixing mechanism, and the gripper shoe pre-tightening assembly comprises a gripper shoe attaching plate. The supporting shoe attaching plate can move in the horizontal direction to abut against the supporting shoe, the hole wall supporting assembly comprises a hole wall supporting plate, the hole wall supporting plate can rotate with the vertical direction as the axis to abut against the hole wall, the supporting structure comprises a supporting shoe pre-tightening assembly and a hole wall supporting assembly, the supporting shoe pre-tightening assembly is used for abutting against the supporting shoe of the TBM, and the hole wall supporting assembly is used for supporting the hole wall of the TBM. The tunnel wall supporting assembly is used for abutting against the tunnel wall, the suspended side of the TBM is supported, it can be guaranteed that in the turning process of the TBM, the two sides of a supporting shoe are stressed, supporting counter force is provided for tunneling or exiting, and therefore the safety of the construction process is enhanced.