107results about How to "Avoid Engineering Accidents" patented technology

A Sagnac-like optical fiber sending device of low coherent twisted type is prepared as connecting optical source and photoelectric detector at a side of a coupler and connecting another side of said coupler to a closed loop formed by series-connecting various single-mode optical sending arms with 2x2 couplers. The closed loop is featured as out-setting single-mode optical fiber of high reflection surface and single-mode out-set optical fiber, using self-focusing lens and scan-reflector to form demodulation end of optical fiber and returning partial light back to light detector through said single-mode optical fiber.

The invention discloses a construction method for a complex geological section earth pressure balance shield passing a middle air shaft. The construction method for a middle air shaft enclosure structure at the shield passing position comprises the following steps of: pouring a continuous middle air shaft enclosure wall, arranging four concrete supports on the enclosure wall, and reinforcing deep stirring piles of structural bottom plates; and constructing a plain concrete continuous wall on the outer side of the end enclosure structure to block a tunnel portal. A backfilling method comprises the following steps of: backfilling plastic concrete in a range of 3 meters, close to the tunnel portal, and backfilling cement stabilizing soil at the middle position. The construction method also comprises the following steps of: casting the structural concrete bottom plates, casting a side wall of a negative second layer to the position of 50 centimeters below the third support, performing horizontal hole prospection on the tunnel portal part, detaching the third support, and casting a structural concrete side wall to the position of 50 centimeters below a middle plate. Collapse accidents of the tunnel portal and serious safety accidents when an electrical park brake (EPB) shield reaches and a shield machine is buried can be effectively avoided under complex geological conditions; and secondary departure of the shield machine in the middle air shaft and related risks caused by the secondary departure can be avoided.

The present invention belongs to the field of cement technology, and is especially one kind of cement retardant and its application. The cement retardant is prepared with 2-acrylamido -2-methyl propyl sulfonic acid 20-50 wt%, itaconic acid 30-70 wt% and sodium hypophoshorate 10-20 wt%, and through mixing to react while adding water in 180-230 wt% and ammonium persulfate in 0.5-4 wt% at 65-92 deg.c for 1-4 hr. The cement retardant is added into cement mortar and used at circulation temperature lower than 95 deg.c to prolong the thickening time of cement mortar effectively.

The invention provides a novel concrete strain gauge and relates to a stress strain measurement device in a civil structure. The novel concrete strain gauge comprises a shell, a temperature sensor, a strain force sensor and a cable. The shell is internally provided with the temperature sensor and the strain force sensor. The middle part of the shell is provided with the cable which is connected with the temperature sensor and the strain force sensor. According to the novel concrete strain gauge, the temperature sensor is added into a common concrete strain gauge, temperature compensation is facilitated, the accuracy and reliability of monitoring data are raised, and an engineering accident caused by the influence of environmental temperature factors is avoided.

The invention discloses a pile foundation buckling critical load analytical solution analysis method based on a two-parameter foundation model. Aiming at the characteristic that overlong pile free sections such as a large-span bridge, a high-pile wharf and the like are easy to bend and damage when the slenderness ratio is overlarge; a constraint effect of soil around a pile is simulated accordingto a two-parameter foundation model, a total potential energy functional of a pile-soil system is established, a pile foundation buckling critical load analytical solution is obtained according to a potential energy standing principle and a variation method, and a reliable theoretical basis is provided for preventing engineering accidents caused by buckling damage of an ultra-long pile. Accordingto the method, the counter-force modulus and the shear modulus of foundation soil are fully considered, the dead weight of the pile foundation is considered, the total potential energy functional of apile-soil system is established, and the buckling critical load analytical solution of the pile foundation is obtained according to the potential energy standing principle and the variational method.Through comparison with the result of an example, the goodness of fit between the analysis result obtained by selecting the two-parameter foundation model and the test result of the pile test is high, and it is shown that the model can effectively reflect the actual stress characteristics and the constraint effect of soil around the pile when the pile foundation is bent.

The invention discloses a concrete strain meter having a temperature sensing function, and relates to the strain measuring device of stress in an earth/wood structure. The concrete strain meter comprises a housing, a temperature sensor, a strain force sensor, and a cable. The temperature sensor and the strain force sensor are disposed in the housing. The cable is disposed on the middle part of the housing, and is connected with the temperature sensor and the strain force sensor. According to the invention, the temperature sensor is additionally disposed in the common concrete strain meter, and therefore the temperature compensation can be facilitated, the accuracy and the reliability of the monitoring data can be improved, and the engineering accidents caused by the ambient temperature factor can be prevented.

The invention discloses an automatic recording instrument for static pressure pile construction and a static pressure pile construction device. The automatic recording instrument comprises a measuring unit and a data acquisition processing unit, wherein the measuring unit comprises a pile pressing force sensor and a pile pressing depth sensor; the data acquisition processing unit is provided with a main control module and a data acquisition module and an input and output module that are respectively connected into the main control module; the pile pressing force sensor and the pile pressing depth sensor are both connected into the data acquisition module; the pile pressing force sensor is installed in a hydraulic oil circuit of a hydraulic cylinder of a static pile pressing machine; the pile pressing depth sensor is installed on a support of the static pile pressing machine; and the outer periphery of a friction wheel is in contact and fit with a pile pressing platform. The automatic recording instrument for static pressure pile construction is convenient to install and suitable for working environments of high on-site dust concentration, oil pollution and the like. The measuring way that a roller rotates and moves is adopted, the structure is sturdy and durable and suitable for continuous operation, and the proper signal pulse width ensures sufficient pulse interval and anti-interference property.

The invention provides a strain gauge and relates to a stress strain measurement device in a civil structure. The strain gauge comprises a shell, a temperature sensor, a strain force sensor and a cable. The shell is internally provided with the temperature sensor and the strain force sensor. The middle part of the shell is provided with the cable which is connected with the temperature sensor and the strain force sensor. According to the strain gauge, the temperature sensor is added into a common concrete strain gauge, temperature compensation is facilitated, the accuracy and reliability of monitoring data are raised, and an engineering accident caused by the influence of environmental temperature factors is avoided.

The invention discloses an embedded type strain gauge, relating to the stress strain measurement device inside the construction structure. The embedded type strain gauge comprises a shell, a temperature sensor, a strain sensor, and a cable. A temperature sensor and a strain sensor are arranged inside the shell. The cable is arranged in the middle of the shell, and the cable is connected to the temperature sensor and the strain sensor. The embedded type strain gauge adds the temperature sensor in the common concrete strain gauge, which is convenient for the temperature compensation, improves the accuracy and reliability of the monitored data and prevents the engineering accidents caused by the environment factors.

The invention discloses a concrete strain gauge, relating to the stress strain measurement device inside the construction structure. The concrete strain gauge comprises a shell, a temperature sensor, a strain sensor, and a cable. A temperature sensor and a strain sensor are arranged inside the housing. The cable is arranged in the middle of the shell, and the cable is connected to the temperature sensor and the strain sensor. The concrete strain gauge adds the temperature sensor in the common concrete strain gauge, which is convenient for the temperature compensation, improves the accuracy and reliability of the monitored data and prevents the engineering accidents caused by the environment factors.

The invention provides a real-time discrimination method and system suitable for surrounding rock grade of a TBM tunneling tunnel. The method comprises the following steps that a statistical analysisis carried out on tunneling data of the existing TBM tunneling tunnel to determine main factors influencing the surrounding rock grade; the TBM tunneling data at each grade is collected, the inappropriate data is removed, and tunneling data sample banks at different surrounding rock grades are established; the data in the sample banks are used for training a BP neural network to obtain a classifier, so that a pattern recognition model is established; trend checking is carried out on each index in the model by using a trend checking method, and the BP neural network pattern recognition model can be obtained after the check is qualified; and an engineering project is tested, and after a testing result meets a set requirement, the final BP neural network pattern recognition model is used fordiscriminating the surrounding rock grades in real time based on importing of the real-time tunneling data.

The invention discloses a device and method for determining the inter-well distance and the direction during drilling of oil and gas wells and belongs to the field of exploration and development of oil and gas fields. The device includes a magnetic field exciter and a matching device, wherein the matching device includes an MWD instrument and a data processing system, a positive pole of the magnetic field exciter is connected with a first oil and gas well through a wire, a negative pole of the magnetic field exciter and a casing string of a second oil and gas well are connected through a wire,the MWD instrument is located in a drill string of the first oil and gas well, and the MWD instrument is connected with the data processing system. The device is advantaged in that in the drilling process of the first oil and gas well, the casing string of the second oil and gas well is loaded with the direct current by the magnetic field exciter to generate an additional electromagnetic field, so the MWD instrument can measure electromagnetic field intensity generated by the casing string in advance, the inter-well distance between the first oil and gas well and the second oil and gas well and the direction are determined, and thereby engineering accidents caused by collision due to the close distance between the first oil and gas well and the second oil and gas well are avoided.

The invention discloses a method for detecting directional reflection imaging of a single-drilled geological radar. The method comprises the following steps: drilling and sampling, placing a geological radar antenna into the bottom of a drill hole first, then pulling the geological radar antenna back to the ground, connecting a drilling radar directional detection tube through a thread, fixing a detection tube fixer to the ground, placing the geological radar antenna into a radar detection channel in the drilling radar directional detection tube, connecting the geological radar antenna to a distance measuring wheel and a computer, adjusting the angle of the drilling radar directional detection tube with the detection tube fixer and a tripod, contrasting full-space reflected radar wave images and reflected radar wave images of each fixed angle, and determining a specific orientation of the abnormal body. The method solves the problem that the single-hole geological radar reflection imaging cannot determine the orientation of a reflector through detection of different directions, and has great significance to the implementation of project and the transparency of the geological body.

The invention relates to the field of building electromechanical technology, and particularly discloses a building electromechanical cable temporary supporting device which comprises a base. A supporting rod is fixed on the upper surface of the base. A bottom groove is arranged in the bottom end of the base. The bottom groove is provided with a brake caster mechanism. The top end of the supportingrod is provided with a cable installation mechanism. The cable installation mechanism comprises a cable fixing frame and a cable movable frame. The supporting rod is provided with an adjustable installation table. The device is specialized for temporarily supporting the cable. The cable is utilized to provide power for electromechanical engineering in the course of construction. The device is flexible and changeable and can meet various requirements such as supporting, movement, installation and erection. The device has high practicability, uses the brake caster mechanism in the bottom grooveto move or fix, and the staff adjusts the height on the adjustable installation table according to the actual erection requirements, then uses the cable fixing frame in the cable installation mechanism to place the cable and then uses the cable movable frame to fix the cable so as to achieve the purpose of supporting.

The invention provides an intelligent air valve. The intelligent air valve comprises a main valve, a valve part, an instant pressure sensor, a displacement sensor and a data recorder; the instant pressure sensor extends into the main valve, and is used for sensing instant fluid pressure in the main valve and capable of outputting pressure information; the displacement sensor is used for sensing the position change of the valve part and capable of outputting valve part displacement information; the instant pressure sensor and the displacement sensor are both connected with the data recorder; and the data recorder can record and transmit the pressure information and the displacement information into the processor. Known from working states of the intelligent air valve, when the intelligent air valve breaks down, failures can be timely discovered and processed to prevent engineering accidents. The invention further provides a monitoring system comprising the intelligent air valve. The monitoring system facilitates remote monitoring by workers. The invention further provides an intelligent air valve monitoring method; and the method facilitates detection and mastering of the working states of the intelligent air valve.

The invention discloses a tunnel section sedimentation and convergence analytical instrument and measuring method. The analytical instrument comprises a semi-circle accurate laser ranging system which is connected with a system host. The system host is fixed on a host carrying plate, a front verticality measuring laser system and a rear verticality measuring laser system are arranged on the front and rear sides of the host carrying plate respectively. A left level bubble and a right level bubble are arranged on the left and right sides of the host carrying plate respectively. A left horizontality fine adjuster and a right horizontality fine adjuster are arranged on the left and right sides of the front verticality measuring laser system respectively. The host carrying plate is fixed on a tripod carrier system. The analytical instrument and the measuring method have the advantages that the front and rear verticality measuring laser systems are arranged on the instrument, so that the consistency and the accuracy of the instrument section before and after measurement are guaranteed; by the aid of the semi-circle accurate laser ranging system, sedimentation or convergence values of 19 measurement points o the tunnel can be measured accurately, and sedimentation or convergence of the tunnel section is monitored effectively.

The invention discloses a method for monitoring the maximum deformation in the lifting process of a large structure, which comprises the following steps of: performing laser irradiation on the surfaceof the structure to form laser speckles, and performing shooting by using a CCD (Charge Coupled Device) camera according to a certain time interval when the structure is not lifted and in the liftingprocess, processing the shot grey-scale map by an image acquisition card to obtain pixel point coordinates of speckles, clustering coordinate data by adopting a K-means module in Python, selecting aclustering center point from each speckle as an approximate substitute of the speckle position, calculating offsets of the corresponding pixel points in matlab to obtain the maximum offset, drawing abroken line graph of which the offset changes along with time; and in the lifting process, if the broken line graph has a special situation, immediately stopping the machine for overhauling. The method can improve the measurement precision of the surface deformation of the structure, simplifies the setting process of the measurement device, reduces the use cost, and greatly improves the measurement efficiency.

The invention relates to a wall damage monitoring device and a method for a underground comprehensive cable duct bank. The device comprises a lifting rail, cloud thermal image cameras, infrared thermal image detection devices, a main controller and a remote computer monitoring pre-warning system, wherein the lifting rail is arranged at the top of the cable duct bank, the number of the cloud thermal image cameras are more, and the cloud thermal image cameras are arranged on the lifting rail correspondingly, the number of the infrared thermal image detection devices are more, and the infrared thermal image detection devices are correspondingly arranged on walls behind the pipelines; and a plurality of cloud thermal image cameras and a plurality of infrared thermal image detection devices areprovided with communication modules correspondingly to carry out wireless communication with a main communication module in the main controller, the main controller is in wireless communication witha central control unit arranged in a control center through the main communication module. According to the device and the method, the walls in the cable duct bank can be monitored in real time, manpower and material resources are reduced, a pre-warning alarm is given out when cracks of the walls reaches 0.2mm or more, and an engineering accident is prevented; and the device is not limited by colliding of pipe column pipelines at the bottom of the cable duct bank, and can cover the cable duct bank containing stair sections, and is wider in detection range.

The invention discloses a mobile port crane data acquisition system based on GPRS, which comprises a field intelligent unit and a remote PC end, wherein the field intelligent unit comprises a PLC controller, a serial port, a field data acquisition end and a GPRS communication module; the remote PC end comprises a data monitoring module and a fault diagnosis module; the PLC controller acquires real-time parameters of the crane; the parameters are transmitted to the field data acquisition end through the serial port; the field data acquisition end carries out compression, processing and interface conversion on the real-time parameters of the crane; the parameters are then transmitted to the remote PC end through the GPRS communication module; the data monitoring module carries out decompression and processing on the received data to obtain the real-time parameters of the crane; and the fault diagnosis module diagnoses whether a fault happens according to the real-time parameters, and a diagnosis result is returned to the field intelligent unit. The data acquisition system of the invention can carry out remote and real-time acquisition, monitoring and fault diagnosis on the working state data of the mobile port crane, the transmission is stable, and the configurability is high.

The invention relates to the technical field of artificial intelligence, in particular to a mechanical part corrosion crack detection method based on artificial intelligence. The method comprises the following steps of acquiring a crack defect image of a mechanical part to obtain a crack defect area, and refining the cracks in the crack defect area to obtain a refined image; acquiring a crack end point in the refined image according to the continuity of the crack, and repairing the interrupted crack in the refined image based on an expansion region of the crack end point; and obtaining a plurality of crack sections of the repaired crack by utilizing the branch characteristics of the crack, and obtaining the damage degree of the crack defect to the mechanical part according to the length and angle of the crack sections so as to take corresponding measures according to the damage degree. The broken crack is repaired according to the continuity and branch characteristics of the crack, and the repaired crack is analyzed to obtain the damage degree of the crack to the mechanical part, so that the detection result is more accurate and reasonable, and the detection error is reduced.

The invention discloses a calculating method for the vertical bearing capacity correction coefficient and the bearing capacity of an inclined steep slope bridge pile foundation. The method comprises the steps that firstly, the pile foundation bearing capacity influence degree [alpha]v under different slopes is calculated, and then the pile foundation side friction reduction coefficient [zeta]v iscalculated according to the pile foundation bearing capacity influence degree [alpha]v obtained in the first step, wherein [zeta]v=1-[alpha]v. After the obtained bearing capacity is multiplied by thecorrection coefficient, the vertical bearing capacity of the pile foundation is closer to the actual bearing capacity of a bridge pile foundation in an inclined steep slope region, and the occurrencerate of engineering accidents is avoided. After the correction coefficient is considered, the vertical bearing capacity of the inclined steep slope bridge pile foundation is more accurate, the designaccuracy can be improved in the pile foundation design, and design changes caused by uncertainty factors in engineering are reduced. After the correction coefficient is multiplied, the design of the pile foundation is closer to an actual value, the material waste is reduced, and the construction cost of the pile foundation is reduced.

The invention provides a maritime work arm folding crane rope looseness detecting device. The detecting device comprises a main arm, a secondary arm, a main winch, a secondary arm pulley set, a PLC unit and a human-computer monitoring interface unit, wherein the secondary arm pulley set includes a pulley, and a sensor for measuring a collecting and releasing state of a steel wire rope on the pulley; the PLC unit is respectively connected with an absolute value encoder and the sensor for judging the state of the steel wire rope between the main winch and the pulley; and the human-computer monitoring interface unit is used for displaying the state of the steel wire rope. The detecting device can accurately obtain the looseness state information of the arm folding crane steel wire rope, reduces the wear of the steel wire rope due to mutual twisting, prevents engineering accidents, and guarantees the maritime work arm folding crane wave compensation precision.