The invention belongs to the field of construction safety monitoring and wireless communication and discloses a construction tunnel safety protection method based on a wireless sensor network and a monitoring system thereof. The method is as follows: by acquiring environment, work amount and locating data of personnel in a tunnel, realizing alarming services of six types of dangerous situations and corresponding safety protection means, calling a protection plan to take protection measures on key parts of the system when emergent (dangerous) events occur, and with the purpose of guaranteeing personal safety, releasing a control command. The system comprises a wireless sensor network based on industrial wireless communication standard WIA-PA, a positioning network and a mobile network. If the dangerous situation develops further, the system exchanges data with a remote mobile server by a 3G network, leads a community security system into the range of a construction tunnel safety protection system, and provides united rescue of communities and disaster control services. The invention is used for tunnel construction safety monitoring, and a computer or 3G mobile equipment can obtain construction site information at any time; and the installation of the WIA-PA wireless network is flexible, and the formed safety protection system and sensing early-warning network make contribution to solving the problem of tunnel safety construction fundamentally.

Construction tunnel safety protection method based on wireless sensor network and a monitoring system thereof

Method for physical simulation test of stability of deep tunnel surrounding rock

The invention relates to a muddy water balance type shield simulation testing system. In the structure of the system, a model box for holding soil is fixed on a base; a refrigeration freezing device is communicated with a freezing pipe in the model box; the front part of a shield machine enters the model box through a guide sleeve on the side of the model box; a cutter disk at the front part of the shield machine is connected with the output shaft of a gearbox of a hydraulic power system through a main shaft; jacks at the left and right sides of the shield machine are connected between the model box and the gearbox; a space between a partition plate behind the cutter disk of the shield machine and the cutter disk forms a muddy water cabin; and an injection pipe of a muddy water pot, whichis connected with an air pressure boosting device, penetrates into the shield machine from the tail part of the shell of the shield machine. The system provided by the invention can simulate the tunneling process of the muddy water shield machine in a submerged tunnel construction with high water pressure and can synchronously record soil pressure, water pressure, displacement and the tunneling parameters of the shield machine, thereby finding out and analyzing the mechanism and conditions of muddy water pressure balance country rock and providing more reliable experiment basis for submerged tunnel construction and the design of a muddy water shield machine.

Muddy water balance type shield simulation testing system

The invention discloses a method and system for monitoring a plurality of control parameters of a synchronous grouting process behind a segment wall during shield tunnel piercing construction in a fiber grating sensing and optical fiber communication mode The method and system is mainly characterized in the remote and real-time multi-parameter monitoring, namely various fiber grating sensors which are pre-buried in segment control positions are used to perform remote and real-time monitoring on control parameters of pore water pressure, soil pressure, segment temperature, concrete stress, rebar stress and other control parameters in synchronous grouting process behind a segment wall, and the grouting pressure can be adjusted according to the monitoring data so as to ensure the grouting to be finished smoothly and ensure the grouting quality The method and system is strong in practical applicability and feasibility, can monitor any link in the synchronous grouting construction behind the tunnel segment wall and can improve the controllability of the synchronous grouting process and the grouting quality

Multi-parameter real-time monitoring method and system for synchronous grouting behind segment wall of shield tunnel

The invention discloses a construction method of an overlapped shield tunnel. The construction method of the overlapped shield tunnel comprises the following steps that a downlink shield tunnel is tunneled, and a tunnel structure adopts a reinforced pipe piece; a soil body clamped between an uplink tunnel and the downlink tunnel is grouted through grouting pipes in secondary grouting holes of the downlink tunnel; a trolley supporting system is arranged inside the downlink tunnel to protect the downlink tunnel before the uplink tunnel is constructed; the uplink tunnel is tunneled, and downlink tunnel supporting trolleys keep synchronous advancing with the tunneling of the uplink tunnel in the construction process; the soil body clamped between the uplink tunnel and the downlink tunnel is grouted through the grouting pipes in secondary grouting holes of the downlink tunnel. The construction method of the overlapped shield tunnel is suitable for the overlapped shield tunnel in the city underground engineering construction, can guarantee safe construction of the overlapped shield tunnel, and enables control measures to be operable, the construction is convenient and rapid, influences of construction on the structure of the overlapped shield tunnel are reduced, influences on the ambient environment are few, and environmental safety risks can be reduced.

Construction method of overlapped shield tunnel

The invention relates to a soil pressure balance type tunnel shield analog experiment system, a rectangular soil coelom with the upper part provided with an opening is internally provided with a shield machine model and filled with a simulated soil body, the axle wire of the shield machine model is overlapped with that of the soil coelom; the upper surface of the simulated soil body is covered with a layer of concrete cushion the upper surface of which is connected with a horizontal loading beam by more than two soil pressure jacks, the horizontal loading beam is connected with the bottom of the soil coelom by an anchor rope; and the simulated soil body is also internally embedded with a soil pressure box, a grating fiber optical sensor and a displacement meter, wherein, the soil pressurebox, the grating fiber optical sensor and the displacement meter are all electrically connected with a data acquisition and processing device. The system can simulate the influence of shield tunnel construction between subways of cities on the stratum and surrounding environment more conveniently, actually and effectively, and provide more actual and accurate experimental data for tunnel construction and design so as to guarantee the high-efficiency and safety of the shield tunnel construction of cities.

Soil pressure balancing type tunnel shielding simulation experiment system

The utility model relates to a soil pressure balancing-type shield construction process simulating tester; a model shield machine is arranged inside a rectangular soil body cavity with the upper part being opened and is filled with simulated soil body, and the axle line of the model shield machine is overlapped with the axle line of the soil body cavity; a concrete bedding layer is covered on the simulated soil body, and the upper surface of the concrete bedding layer is connected with a horizontal loading beam through two or more soil pressure jacks, and the horizontal loading beam is connected with the bottom part of the soil body cavity through an anchor rope; and a soil pressure box, a fiber grating sensor and a displacement meter are arranged inside the simulated soil body, and the soil pressure box, the fiber grating sensor and the displacement meter are electrically connected with a data collecting and processing device. The tester can conveniently and truly effectively simulate the influence of the subway interval shield channel construction on the ground layer and the periphery environment, thereby providing true and correct experiment data for the channel construction and design, and ensuring the high efficiency and safety of the urban shield tunnel construction.

Soil pressure balancing-type shield construction process simulating tester

The invention relates to a multi-tunnel assembling-type intelligent ventilation control method of expressway section, which comprises utilizing a continuity character that expressway traffic flow passes through a plurality of tunnels on sections in turn, an antecedence tunnel dopes out traffic flow data and contaminant concentration of a next control periodic time according to actual measured traffic flow and contaminant concentration data, a subsequent tunnel predicts traffic flow data and contaminant concentration of a next control periodic time of the subsequent tunnel according traffic flow of current control cycle of antecedence tunnel and the actual measured traffic flow and contaminant concentration data of the tunnel, and each tunnel controls the starting times of fans according predicted value of contaminant through adopting a model of intelligent fuzzy reasoning The method can more accurately beforehand predict concentration variation of traffic flow, smog and carbon monoxide in adjacent tunnels, thereby beforehand and accurately controlling starting amount of a jet fan, the control method has excellent ventilation control effect, which can simultaneously reduce energy consumption, and can improve service span of fans

Express highway section multi- tunnel gathering type intelligent aeration control method

The invention discloses an expressway tunnel group illumination system control system and method The system comprises illumination lamps, vehicle detectors, outside-tunnel luminance detectors and fuzzy logic control modules, wherein the illumination lamps, the vehicle detectors, the outside-tunnel luminance detectors and the fuzzy logic control modules are arranged at downstream tunnel inlet ends and adjacent upstream tunnel outlet ends of all basic control units Traffic flow parameters QV serve as first input parameters of the fuzzy logic control modules Outside-tunnel luminance L serves as second input parameters of the fuzzy logic control modules The distances D between every two adjacent tunnels are preset in the fuzzy logic control modules to serve as third input parameters Illumination intensity levels R are output after reasoning is conducted through logics preset in the fuzzy logic control modules Illumination of upstream tunnel outlets and illumination of adjacent downstream tunnel inlets are controlled according to the illumination intensity levels R By means of the expressway tunnel group illumination system control system and method, the influences of the distances of the adjacent tunnels of a tunnel group on illumination control are taken into full consideration, electric power consumption for tunnel illumination is lowered, and a better illumination effect is achieved

Expressway tunnel group illumination system control system and method

The invention relates to a linkage ventilation control method of adjacent tunnel of high speed highway, which comprises utilizing a continuity character that when high speed highway traffic flow passes through adjacent tunnels in turn, simultaneously calculating out the amount of contaminant of a front tunnel which is diffused into a subsequent tunnel. A data process and control system calculates the predicted value of contaminant concentration in future time step on the basis, and meanwhile, the front tunnel predicts predicted value of contaminant concentration in future time step according to actual measured traffic flow and wind speed, and then adopts a fuzzy deduction method to do fuzzy intelligence control for fan starting number of the front tunnel and the subsequent tunnel. The method can more accurately beforehand predict concentration variation of traffic flow, smog and carbon monoxide in adjacent tunnels, thereby beforehand and accurately controlling starting amount of a jet fan, the method has excellent ventilation control effect, which can simultaneously reduce energy consumption, and can improve service span of fans.

Yong Fang

Papers

Soil pressure balancing type tunnel shielding simulation experiment system

Soil pressure balancing-type shield construction process simulating tester

Express highway section multi- tunnel gathering type intelligent aeration control method

Expressway tunnel group illumination system control system and method

Express highway adjoining tunnel linkage aeration control method