33 results about "Tunnel under construction" patented technology

The invention discloses a tunnel steel arch recognition method based on three-dimensional imaging. The method comprises the following steps: data preprocessing, point cloud coordinate system correction, radial filtering, steel arch feature point extraction, steel arch extraction and the like. Through processing of three-dimensional point cloud data, a steel arch in a tunnel under construction canbe accurately recognized, and the method has high practical engineering significance in detection of the steel arch installation position and improvement of tunnel engineering machinery automation.

The invention discloses a conversion permeability coefficient-based method for controlling tunnel discharge by regions. The method comprises the following steps: dividing a tunnel under construction into a plurality of tunnel segments along a longitudinal extension direction from back to front, and respectively performing tunnel discharge control on the tunnel segments, wherein methods for controlling the tunnel discharge of all the tunnel segments are identical; the step of performing the tunnel discharge control on any tunnel segment comprises the following steps: I: predicting the tunnel discharge; II: calculating a lining conversion permeability coefficient; III: determining tunnel control discharge; IV: determining a water plugging and discharge limiting water level control standard; V: judging a water plugging and discharge limiting region; VI: performing water plugging and discharge limiting: grouting the outer side of a lining of each tunnel segment by adopting a grouting system and forming a grouting circle so as to perform water plugging and discharge limiting on the tunnel segment. The method disclosed by the invention is simple in steps, reasonable in design, convenient to implement and has a good using effect; the tunnel discharge of an ecologically sensitive region is effectively controlled by regions and by combining with the reasonable water plugging and discharge limiting water level control standard.

The invention discloses an intelligent monitoring, measuring and early warning system and method for construction safety of a tunnel under construction. The system comprises an intelligent photographing and camera shooting module, an advanced geological forecasting module, a monitoring and measuring module, an environment monitoring module, a wireless transmission module, a data comprehensive analysis module and an intelligent early warning module. According to the system, the informatization and automation degree of safety early warning management of tunnel construction under construction is improved, and the management and control difficulty of tunnel construction safety risks is reduced; and the level of tunnel safety management is improved. Through integration of seven modules, mutual correlation and mutual combination of data of each module, comparative analysis and comprehensive evaluation of monitoring data of each module, the system can greatly improve the precision of the monitoring data, dynamically feed back the monitoring data in real time and guide construction, and reduce the monitoring cost to the greatest extent. Intelligent early warning of tunnel construction safety is achieved, potential safety hazards and the probability of occurrence of safety accidents are reduced, casualties are avoided, and potential safety hazards are eliminated.

The invention discloses a tunnel deformation real-time monitoring method and a device, and the method comprises the steps: S1, erecting a plurality of structured light sources in an unstable region ofa tunnel structure which needs to be monitored, erecting a monitoring terminal in a relatively stable region of the tunnel structure, and enabling the monitoring terminal to communicate with the plurality of structured light sources; S2, adopting the monitoring terminal to observe all structured light in an unstable area of the tunnel structure and obtain a structured light curve in real time; and S3, adopting a data processing unit to analyze the structured light imaging change, detect the tunnel deformation degree and offset distance in real time, and monitor tunnel single-section settlement, convergence, multi-section overall settlement and other diseases. The method is suitable for tunnels under construction and operating tunnels, monitoring points are dense, and tunnel deformation can be monitored in real time.

The invention relates to a tunnel surrounding rock geological classification information prediction method based on a Bayesian neural network, and the method comprises the steps: collecting surrounding rock geological classification information of an existing tunnel and a fine collection tunnel under construction, carrying out the normalization processing, and determining the probability distribution of the tunnel surrounding rock geological classification information through Monte Carlo random analysis; preliminarily determining the number of nodes of an input layer, a hidden layer and an output layer of the Bayesian neural network model so as to establish a Bayesian neural network prediction model by utilizing the existing tunnel engineering data with similar geological information; andupdating the prediction model in real time by utilizing tunnel surrounding rock geological classification information newly obtained in the excavation process along with continuous forward advancing of the working face, and further gradually improving the prediction precision of the model. The prediction method provided by the invention has good universality and high prediction precision, can makeeffective judgment on geological classification information of an unknown section in front of tunnel excavation in advance, and is suitable for prediction of geological classification information ofmost tunnel surrounding rocks.

The invention discloses a ventilation equipment coordination control system for tunnel construction. The system comprises an air quality status detection apparatus for carrying out real-time detection on the air quality status at the tunnel face of a tunnel under construction and a coordination monitoring device for controlling tunnel ventilation equipment arranged in the tunnel under construction. The tunnel ventilation equipment comprises multiple stages of blower fans. The coordination monitoring device comprises a plurality of blower fan monitors for controlling starting and stopping time and working parameters of the multiple stages of blower fans respectively, a starting and stopping interval time setting unit, an air output difference value setting unit, a timing control circuit for controlling the starting and stopping time of the multiple stages of blower fans according to the interval time set by the starting and stopping interval time setting unit, and a concentration controller for performing concentration control on the multiple stages of blower fans according to detection results of the air quality status detection apparatus. The ventilation equipment coordination control system is reasonable in design, convenient to install and arrange, easy to use and operate, good in usage effect, and is capable of performing coordination control on the starting and stopping time and the working parameters of the multiple stages of blower fans.

The invention discloses a full-automatic tunnel wet spraying state detection method based on a three-dimensional laser radar. The method comprises the following steps of firstly, acquiring surface point cloud information of a tunnel under construction by using a three-dimensional laser radar, and then carrying out three-stage preprocessing on point cloud data, completing tunnel point cloud pose correction by using three times of projection; combining a random sampling consistency algorithm with a Euclidean clustering algorithm to complete extraction of tunnel surface point cloud, and filtering obstacles and ground point cloud data; compensating the point cloud data in combination with an adaptive threshold method and a segmented cubic Hermite interpolation algorithm; and finally, establishing a tunnel rock surface wet spraying state detection model, and solving a solution of the model in combination with a Gaussian-Newton iteration method. According to the method, a tunnel surface wet spraying state of the oval tunnel can be automatically detected, the to-be-wet-sprayed depth of each point on the tunnel surface is calculated, manual intervention is not needed in the whole process, and the method can be applied to state detection of tunnel wet spraying concrete and solution of the to-be-wet-sprayed depth.

The invention provides a method for detecting the irregularity of a temporary transportation track of an overlong TBM (Tunnel Boring Machine) tunnel under construction, which is applied to a track irregularity detection evaluation system and aims to solve the problem of low detection capability of track irregularity detection in the prior art, and comprises the following steps of: (1) running a rail train with a sensor on an initially paved temporary track according to different speeds; acquiring amplitudes of vehicles passing through track joints under different vehicle speed working conditions as initial values, and establishing a standard database; (2) acquiring data such as speed, amplitude, mileage and the like during operation of the rail train, comparing and analyzing the data with a standard database, and evaluating the irregularity of each contact, each section of rail and each kilometer of rail; and (3) reminding a driver of vehicle deceleration through a vehicle-mounted display device, and reminding a manager of temporary track maintenance through a background data report. The method has the advantages that real-time detection and evaluation can be achieved through double-track measurement, manual inspection is reduced, the detection frequency is improved, and the temporary railway vehicle driving risk is effectively reduced.

The invention discloses a tunnel construction ventilation monitoring system. The tunnel construction ventilation monitoring system comprises a smoke dust concentration meter arranged on the peripheral side of a face of a tunnel under construction, a harmful gas concentration detection unit arranged on the peripheral side of the face of the tunnel under the construction, an air speed monitor used to detect air speed at a pipe orifice of a flexible air pipe installed in the tunnel under the construction, an air pipe orifice size automatic regulating device which moves back and forth along the longitudinal extension direction in the tunnel under the construction, an upper monitor machine arranged on the outer side of the tunnel under the construction and a handheld remote control terminal carried by a tunnel ventilation constructor, wherein the smoke dust concentration meter, the harmful gas concentration detection unit and the air speed monitor are all connected with the upper monitor machine. The tunnel construction ventilation monitoring system is simple in structure, reasonable in design, simple and convenient to use, and good in use effect, can automatically monitor concentration of blasting fume and harmful gas around the face of the tunnel, and can correspondingly adjust the size of the pipe orifice of the flexible air pipe according to a monitor result so as to correspondingly adjust the air speed at the pipe orifice of the flexible air pipe.

The invention discloses a construction method for removing a temporary inverted arch of down-traversing obliquely crossed tunnels. The construction method is applied to obliquely crossed zones generated by tunnels under construction and the existing tunnels for demounting the temporary inverted arch. According to different kinds of stress of the tunnels under construction, the obliquely crossed zones generated by the tunnels under construction and the existing tunnels are divided into various demounted sections, one demounted section is selected as an experiment section, and the experiment section is gradually demounted sectionally in several times. Different construction methods can be adopted for all sections more specifically, and the construction safety is improved.

The invention discloses a tunnel three-dimensional reconstruction imaging method and system and application thereof. The method comprises the steps of: carrying out high-precision and multi-section scanning on each detection unit region divided on a tunnel main body structure through precise high-frequency electromagnetic waves; converting acquired electromagnetic wave signals into digital signals; generating a digital matrix based on the digital signals through a computer; and a three-dimensional image can be formed. The quality of the tunnel structure can be judged more visually and accurately. The method and system have the characteristics of short scanning time, convenience, rapidness, high-density resolution, clear images, three-dimensional directness, capability of generating high-precision sectioning planes in various directions and the like; the method and system can be used for construction quality evaluation of a tunnel under construction, three-dimensional nondestructive detection of an operated tunnel and building information model acquisition of the tunnel, can greatly improve the accuracy and efficiency of detection work, lower the risk of the detection work; and a three-dimensional image reconstructed after detection has the advantages of being visual and low in identification difficulty; and an important guarantee is provided for engineering quality and operation safety of traffic infrastructure.

The invention relates to the technical field of tunnel engineering construction, in particular to a construction method for underneath passing of a three-hole highway tunnel through an existing railway. Through the above scheme, the geological data of the three highway tunnels crossing the existing railway area and the geographic coordinate information of the existing railway are collected, the sensors are arranged on the existing railway, the collected information is imported into the modeling software to establish the geological model, and then the information collected by the sensors is transmitted to the model in real time. And the next circulating footage is adjusted in real time according to the settlement amount, monitored by the sensor, of each circulating footage, so that the technical defect that in the prior art, the construction progress of the tunnel under construction cannot be adjusted in real time according to information such as settlement displacement of an existing railway during tunnel excavation is overcome.