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399 results about "Mass concrete" patented technology

Mass concrete is defined by American Concrete Institute Committee 207 as "any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat from hydration of cement and attendant volume change to minimize cracking."

Cooling water pipe for gravity dam construction based on destroying laminar sublayer and method thereof

The present application belongs to the technical field of mass concrete construction, and aims to solve the problem of high thermal resistance and slow heat dissipation of traditional cooling pipe laminar bottom layer, and discloses a gravity dam construction cooling water pipe based on destruction of laminar bottom layer and a method thereof. The cooling water pipe comprises a plurality of series water pipe units, each water pipe unit comprises a steel pipe, a flexible spring hose is arranged in the steel pipe, and the spring hose forms a spiral protruding turbulence structure along the inner wall of the steel pipe; the hose is fixed by pointwise anchoring and outer wall surface bonding with glue, and a ring is arranged at both ends for limiting and assisting turbulence. The present application breaks through the thermal resistance of laminar bottom layer, greatly improves the hydration heat conduction efficiency, is convenient to construct and has durable structure, and is suitable for mass concrete temperature control requirements.
Owner:SHANDONG PROVINCE WATER CONSERVANCY BUREAU CO LTD

Multi-parameter fusion early warning system for mass concrete water storage and maintenance process

The invention relates to the technical field of building engineering construction monitoring, and particularly discloses a mass concrete water storage and maintenance process multi-parameter fusion early warning system which comprises a multi-source heterogeneous sensing network, an edge computing gateway, a cloud fusion analysis platform and an early warning execution terminal. The sensing network collects multi-dimensional parameters such as temperature, humidity and stress of concrete and the environment; the cloud platform evaluates the maintenance state and generates a graded early warning instruction based on a multi-physics field coupling model and a fusion early warning algorithm; and the early warning terminal drives the field device to execute differential intervention. According to the invention, comprehensive perception, accurate evaluation and active regulation and control of the states of multiple physical fields in the maintenance process are realized, and the early warning reliability and the maintenance quality are improved.
Owner:福建新华夏建工集团有限公司

Concrete quality three-level monitoring device and method

The invention discloses a concrete quality three-level monitoring device and method, and belongs to the technical field of concrete construction. The method aims at solving the cracking problem caused by factors such as temperature stress and shrinkage stress in mass concrete construction and the key technical problems such as data islanding phenomenon and regulation and control lag in an existing monitoring method. According to the technical scheme, a three-level monitoring system of pouring layer-cooling layer-structural layer is constructed, and various key parameters such as temperature, humidity, flow velocity and cooling water flow of concrete in pouring, cooling and stabilizing stages are accurately monitored in real time; the central controller is used for carrying out real-time analysis processing and dynamic regulation and control on the data, so that comprehensive, accurate and continuous monitoring on the concrete construction quality is realized; the method is mainly applied to monitoring scenes of mass concrete construction quality, concrete cracking can be effectively prevented, the engineering quality and safety are remarkably improved, and reliable technical guarantee is provided for the concrete construction industry.
Owner:CHINA THREE GORGES UNIV

Temperature control system model, construction method and application

The invention belongs to the technical field of mass concrete construction, and discloses a temperature control system model, a construction method and application. A water cooling technology is mostly adopted in traditional mass concrete construction, but water is difficult to take in special construction sites, a large number of water resources need to be wasted, temperature control measures of the traditional water cooling technology are lagged, and the crack probability is remarkably increased. According to the temperature control system model, the construction method and the application, a second-order response surface is used for fitting a multi-parameter temperature control system model, and the temperature control system model is corrected and optimized according to measured data acquired by a temperature control acquisition unit, so that a closed-loop control system is formed. The concrete grid units and the corresponding air guide pipes serve as minimum temperature control units, construction, temperature control and management are carried out, the management and control granularity is finer and more accurate, and a new research and development direction is provided for the temperature control technology of mass concrete construction.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP CO LTD

Mass concrete three-dimensional warehousing path planning method

The invention discloses a mass concrete three-dimensional warehousing path planning method, effectively solves the problem of coordinated control of concrete warehousing speed and pumping pressure in a complex space, and avoids segregation or cold seam defects caused by improper speed setting. A dynamic path correction mechanism guarantees the motion precision of the material distributing machine in a three-dimensional space, a data-driven self-optimization model remarkably improves the stability and the construction efficiency of the pouring process, and complete collection and accurate modeling of spatial data of a pouring area are further achieved. The problems of equipment collision risk and path planning deviation caused by incomplete measurement data in traditional construction are solved. Through multi-source data fusion and intelligent processing, it is ensured that the three-dimensional model accurately reflects spatial constraint conditions of an actual construction environment, a reliable geometric reference is provided for distribution machine arrangement and pumping path planning, and construction rework and resource waste caused by model distortion are avoided.
Owner:POWER CHINA KUNMING ENG CORP LTD +2

Mass concrete construction temperature control and anti-cracking integrated system and method

The invention discloses a mass concrete construction temperature control anti-cracking integrated system and method, and the system comprises a construction module which is used for constructing a cooling water pipe fine model based on concrete thermodynamic parameters and construction conditions, solving a heat flow coupling control equation through a heat flow coupling algorithm, and determining a concrete internal temperature field and stress field distribution cloud chart; the monitoring module is used for collecting attribute data of concrete; the comparison module is used for comparing the attribute data with the concrete internal temperature field and stress field distribution cloud atlas, correcting model parameters of the heat flow coupling model according to a comparison result, generating a regulation and control instruction and sending the regulation and control instruction to the execution module; the execution module is used for receiving and executing the regulation and control instruction; the regulation and control instruction comprises at least one of temperature regulation and pouring time sequence optimization. A temperature field and a stress field are accurately predicted, complex construction working conditions are matched, mechanical and thermal state changes of the whole life cycle of concrete are captured in real time, temperature control adjustment is effectively conducted, and the construction quality is improved.
Owner:CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD +1

Mass concrete temperature measurement early warning method and system

The invention discloses a mass concrete temperature measurement early warning method and system, and belongs to the technical field of building engineering construction, and the method comprises the following steps: arranging a plurality of temperature sensor nodes in concrete through three-dimensional distributed real-time temperature collection, and collecting temperature data; performing temperature field reconstruction by using an edge computing gateway to generate a three-dimensional temperature cloud picture in the concrete; using an LSTM neural network to predict a future temperature change curve; calculating the temperature difference and the temperature rise rate of each node and the surface layer in real time, and dynamically determining a threshold value; and triggering multi-stage early warning, automatically starting a cooling system and pushing alarm information. According to the system, high-precision reconstruction of a three-dimensional temperature field in concrete and accurate prediction of a temperature change trend can be realized, generation of temperature cracks is effectively prevented through dynamic threshold determination and a multi-stage early warning mechanism, and the safety and durability of a mass concrete structure are ensured.
Owner:CHINA CONSTR THIRD BUREAU GRP (SHENZHEN) CO LTD +1

Optimized layout method and system for mass concrete hydration heat monitoring sensors

The invention relates to the technical field of mass concrete hydration heat monitoring, and particularly discloses an optimized layout method and system for mass concrete hydration heat monitoring sensors. The temperature field and the stress field are obtained through the trained prediction model and the target parameters of the concrete pouring project, the prediction precision of the temperature field is improved, meanwhile, the key monitoring area is determined according to the temperature field and the stress field, the contribution degree and optimization solution are combined, the optimal layout scheme is obtained, the space coverage degree of temperature monitoring is improved, and the prediction precision of the temperature field is improved. The use efficiency of the sensor is optimized, the monitoring cost is reduced, and a more intelligent solution is provided for hydration heat control in the mass concrete construction process.
Owner:SICHUAN RAILWAY CONSTR CO LTD +1

Method and device for monitoring temperature of mass concrete in construction of open cut tunnel with ultra-wide section

The invention provides a mass concrete temperature monitoring method and device for ultra-wide section open cut tunnel construction, and relates to the technical field of constructional engineering.The method includes the steps that geometric parameters of a tunnel are collected, a three-dimensional model is constructed, grid division is conducted in combination with concrete material attributes, and a simulation model is generated; the temperature gradient modulus of a node under each time step is calculated by simulating the whole process of concrete from pouring to cooling; a gradient extraction neighborhood is constructed with the initial temperature monitoring point as the center, the maximum gradient intensity in the neighborhood is extracted, a gradient integral index is calculated, and alternative monitoring points are screened out; and finally, by calculating representative weights between the alternative monitoring points and the nodes, selecting a final monitoring point with the best representativeness to carry out temperature sensor arrangement, so that scientific and dynamic monitoring of the concrete temperature field is realized, and the monitoring precision and efficiency are effectively improved.
Owner:SHIJIAZHUANG TIEDAO UNIV +2

Mass concrete temperature control construction method and system based on phase change energy storage

The invention discloses a mass concrete temperature control construction method and system based on phase change energy storage, and the method comprises the steps: S100, building a BIM model for a concrete member pouring region according to a design size, setting a temperature sensor in a concrete member to monitor data in real time, and predicting a temperature field in combination with the BIM model; s200, the space between the conventional cooling water pipe and the concrete protection layer is filled with phase change microcapsules in a gradient density mode, a phase change energy storage buffer layer is formed, and transfer of heat to the interior of the concrete member is delayed; s300, according to the predicted temperature field, the water inlet flow and the water temperature are dynamically adjusted, the temperature peak is controlled, and the cooling rate is controlled; s400, fiber grating sensors are arranged at the four corners and the midspan of the concrete member, and the strain change rate is detected; and S500, establishing a digital twin temperature control platform, integrating temperature, humidity and strain data, constructing a three-dimensional thermodynamic model, predicting the temperature rise trend of the concrete member, and performing adaptive regulation and control on the temperature. Temperature difference inside and outside the concrete is controlled through phase change temperature control.
Owner:CHINA RAILWAY BRIDGE SCI RES INST LTD +2

High-performance mass concrete regulation and control method based on hydration heat and shrinkage control

The invention discloses a high-performance mass concrete regulation and control method based on hydration heat and shrinkage control, and relates to the technical field of concrete regulation and control, and the method comprises the following steps: inputting a start response phase difference into a constructed collaborative entropy mapping model of a hydration heat release and volume shrinkage rhythm relationship based on a determined hydration start behavior asynchronous phenomenon, and obtaining a hydration heat release and volume shrinkage rhythm relationship; generating a synchronization parameter between the surface hydration heat release curve and the internal volume shrinkage curve to judge whether the concrete surface hydration heat release is matched with the internal shrinkage control rhythm or not; and according to a judgment result, calling a threshold hierarchical model to divide the concrete state into rhythm matching, moderate mismatching or serious mismatching, and obtaining a state grade result corresponding to the synchronization parameter. According to the method, the problem that concrete hydration starting behaviors are asynchronous and difficult to identify and regulate due to surface ventilation treatment is solved, and accurate matching and dynamic regulation and control of surface hydration heat and internal shrinkage rhythm are realized.
Owner:SHANGHAI TONGMIN NEW MATERIAL CO LTD +1

Mass concrete intelligent temperature control system

The invention discloses an intelligent temperature control system for mass concrete, and the system comprises a state collection module which collects initial parameters of the concrete in real time, carries out the time sequence alignment and noise filtering of the state parameters of the concrete, and obtains the temperature state data of the concrete; the intelligent analysis module is used for inverting concrete thermal parameters through a physical information neural network based on the concrete temperature control data, substituting the concrete thermal parameters into a heat conduction finite element control equation to calculate space-time evolution of the whole-field temperature and stress field, and obtaining twin data of the concrete structure; and the prediction optimization module is used for executing multi-step rolling in a multi-input single-output branch mode based on the twin data of the concrete structure to predict temperature and stress evolution in a future time period, and learning dynamic association among the temperature, the stress and the cooling flow to execute minimum energy consumption screening of a temperature control standard and stress constraint to obtain an optimal cooling control instruction.
Owner:NANYANG NORMAL UNIV

Concrete crack prevention and control method and system based on digital twinborn simulation

The invention provides a concrete crack prevention and control method and system based on digital twinning simulation, and relates to the technical field of digital twinning, and the method comprises the steps: building a digital twinning model of mass concrete, and simulating the temperature and stress development process of the mass concrete based on a thermal-mechanical coupling relation to predict the crack risk; generating an anti-crack strategy based on the predicted crack risk; and controlling intelligent maintenance equipment to execute the anti-cracking strategy so as to prevent and control concrete cracks. According to the method, the digital twin model of the mass concrete is constructed, dynamic evolution of temperature and stress is accurately simulated in combination with the thermal-mechanical coupling relation, the crack risk is effectively predicted, and prevention and control scientificity and accuracy are remarkably improved. The generated anti-crack strategy can guide intelligent maintenance equipment to realize automatic and precise maintenance operation, the manual intervention cost is reduced, and the crack occurrence probability is reduced, so that the durability and safety of a concrete structure are improved, and reliable technical support is provided for a large-scale engineering project.
Owner:CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD +1

Large-volume concrete cooling water flow control method and system and storage medium

The invention discloses a mass concrete cooling water flow control method and system and a storage medium, and relates to the technical field of engineering control, and the method comprises the following steps: collecting concrete internal temperature data and cooling water flow data and temperature data of each branch in a cooling water pipe network in real time; based on the collected concrete internal temperature data, establishing an exponential decay model, and predicting the temperature of each concrete area in a future preset time period; dynamically calculating an optimized flow set value required by each cooling water branch according to a heat balance principle; based on the optimized flow set value required by each cooling water branch, the opening degree of each branch control valve and the opening degree of a system water escape valve are dynamically adjusted through a cascade control strategy of flow and pressure, and control over the cooling water flow is achieved. Uniform and synchronous cooling of mass concrete can be achieved, the temperature difference between the inner surface and the outer surface is remarkably reduced, temperature cracks are effectively restrained, and the construction quality and the structural durability are improved.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP CO LTD

Temperature control system, method and equipment for mass concrete and storage medium

The invention relates to the technical field of concrete engineering, and discloses a mass concrete temperature control system, method and device and a storage medium, and the system comprises a multi-dimensional sensor module which is used for collecting the contact temperature of each temperature measurement point and transmitting the contact temperature to a controller; the non-contact monitoring module is used for collecting the non-contact temperature of a preset area of the mass concrete and transmitting the non-contact temperature to the controller; the controller is used for performing temperature analysis according to the contact temperature and the non-contact temperature of the mass concrete, generating three-dimensional temperature field distribution of the mass concrete, predicting a temperature change trend of a future preset time period according to the three-dimensional temperature field distribution, and generating a temperature adjusting instruction according to the temperature change trend; and the temperature adjusting module is used for adjusting the temperature of the concrete with the abnormal temperature change trend according to the temperature adjusting instruction. The crack risk of mass concrete caused by temperature change is effectively controlled, the engineering quality is guaranteed, and the construction intelligent level and the management efficiency are improved.
Owner:CHINA HUADIAN ENG CO LTD

Device for cooling concrete coarse aggregate by using cooling water and operation method thereof

The invention belongs to the technical field of building construction, and particularly provides a device for cooling concrete coarse aggregate by using cooling water, which comprises an aggregate storage bin, a temperature sensor, a weight sensor and a control unit, the top of the aggregate storage bin is provided with a water inlet and a feed inlet, the bottom of the aggregate storage bin is communicated with a water collecting device, and a water filter screen and a baffle are mounted in the aggregate storage bin; temperature sensors are mounted in the water inlet, the feed port and the water collecting device, weight sensors are mounted on the baffle and in the water collecting device, and the control unit comprises a heat exchange kinetic model and a water content calculation model. The concrete aggregate cooling device can conveniently cool concrete aggregate, can measure aggregate delivery temperature and moisture content data, realizes conversion from passive cooling to predictive intelligent control, effectively controls concrete mold entering temperature, reduces cracks caused by hydration heat, and improves mass concrete construction quality and structural safety. The invention also provides an operation method of the device for cooling the concrete coarse aggregate by using the cooling water.
Owner:HUNAN UNIV OF SCI & TECH

Temperature control anti-cracking process for mass concrete shear wall structure engineering

The invention relates to the technical field of constructional engineering, in particular to a temperature control anti-cracking process for mass concrete shear wall structural engineering. Comprising the following steps that raw materials of concrete are optimized, and the mix proportion of the concrete is determined; a layered and segmented pouring and alternate warehouse method is adopted for construction; the intelligent temperature control system is buried, and the temperature of the concrete is monitored in real time; after concrete pouring is completed, a dynamic heat preservation and maintenance process is carried out; dynamic stress release is carried out, stress monitoring and kerf release are carried out, and an early warning system is established; post-cast strip sealing and micro-expansion compensation are conducted; through the mode, the concrete temperature is accurately monitored in real time, the temperature change conditions inside and on the surface of the concrete are mastered in time, temperature control measures are dynamically adjusted according to actual temperature data, the temperature difference inside and outside the concrete is effectively controlled, and the crack problem caused by temperature stress can be effectively prevented.
Owner:LVYI CONSTR GRP CO LTD

Intelligent monitoring method and system for durability of mass concrete in salt-fresh water area

The invention discloses an intelligent monitoring method and system for the durability of mass concrete in a salt-fresh water area, and the method comprises the steps: carrying out the field analysis of a salt-fresh water mass concrete monitoring project, and dividing a salt-fresh water monitoring area into a plurality of monitoring nodes; according to the specific conditions of different salt-fresh water mass concrete monitoring projects, monitoring is carried out at each monitoring node through a sensor and an unmanned aerial vehicle; analyzing the sensor historical data set of each monitoring node through a priority level division algorithm, dividing monitoring priority level types, and generating a monitoring priority level list corresponding to each monitoring node; performing feature extraction and training on the unmanned aerial vehicle historical data set of each monitoring node through a DenseNet-MLP network model, wherein the trained model is used for durability risk monitoring of each monitoring point; through deep learning model monitoring, the monitoring node priority list is introduced for monitoring management and control, concrete durability intelligent monitoring is realized, and the concrete durability risk monitoring precision in the salt and fresh water area is improved.
Owner:CCCC FOURTH HARBOR ENG INST CO LTD +1

Dynamic temperature regulation and control method for mass concrete cooling water pipe of crash bearer bearing platform

The invention discloses a dynamic temperature regulation and control method for a mass concrete cooling water pipe of an anti-collision pier bearing platform. The method comprises the steps of deployment of a monitoring module, preprocessing of multi-source monitoring data, deployment of an execution module, establishment of a neural network model, training of the neural network model, real-time continuous decision making and dynamic temperature regulation and control. A neural network model based on physical constraints ensures that the regulation logic conforms to the thermodynamic law; through historical multi-working-condition data training, the model can respond to the environment change and the hydration process in real time, the optimal regulation and control parameters are output, the limitation of a traditional empirical formula or a simplified model is solved, and dynamic optimization regulation and control are achieved.
Owner:GUANGDONG GUANYUE HIGHWAY & BRIDGE

Mass concrete cooling device with additional thermoelectric material

The utility model discloses a large-volume concrete cooling device with additional thermoelectric materials. The large-volume concrete cooling device comprises a water pipe, a flexible joint, a thermoelectric assembly and a radiator, the multiple sections of water pipes are flexibly connected end to end through flexible joints, and water outlets and water inlets of the water pipes are communicated with an external water source to form a closed-loop water circulation path; a plurality of thermoelectric components are bonded on the outer surface of the water pipe at intervals and are connected with the radiator; the electric heating assembly is communicated with an external energy storage device. The cold end of the thermoelectric module is bonded with the aluminum pipe, and the hot end of the thermoelectric module is bonded with the copper radiator, so that real-time monitoring of the internal temperature of concrete and hydration heat power generation are synchronously realized; the thermoelectric module converts waste heat of a traditional water cooling system into electric energy through the thermoelectric power generation technology, and the problem of heat waste is solved. Meanwhile, a high-temperature area can be accurately positioned through electric signal feedback, and the crack risk is remarkably reduced.
Owner:CENT SOUTH UNIV +2

Aggregate supply bin for mass concrete production

The application discloses an aggregate supply bin suitable for mass concrete production and relates to the field of concrete production.The aggregate supply bin comprises a storage bin and a feeding port.The feeding port is arranged above the storage bin and is used for supplementing and adding aggregates in the storage bin.A sorting bin is connected below the storage bin, and a discharge port is arranged below the sorting bin.A discharge opening is arranged below the storage bin, and a discharge control mechanism is arranged in the discharge opening to control the discharge of the discharge opening.A feeding channel is communicated below the discharge opening, the feeding channel is arranged in the sorting bin, and a sorting cylinder is arranged on the right side of the feeding channel.The aggregate supply bin can sort aggregates before discharge through the arrangement of the sorting bin, the sorting cylinder is arranged in the sorting bin, the sorting cylinder can realize continuous screening through rotation, and the sorting cylinder can also avoid aggregate blockage, thereby ensuring the stability of subsequent discharge.
Owner:CCCC FIRST HARBOR ENGINEERING CO LTD +1

Mass concrete pouring articulated chute construction device

The utility model discloses a mass concrete pouring articulated chute construction device which comprises a main articulated chute and a plurality of supporting frames, the main articulated chute is arranged in an inclined mode, the supporting frames are supported below the main articulated chute at intervals, the lower side of the main articulated chute is connected with a plurality of vertical articulated chutes at intervals, and the vertical articulated chutes are connected with the main articulated chute. A tail end hopper is arranged at the lower end of each vertical articulated chute, branch articulated chutes are respectively arranged at the bottom and the side part of the tail end hopper, a discharging control plate is rotationally arranged at the position, corresponding to the inlet end of each branch articulated chute, in the tail end hopper, and the discharging control plate is used for controlling the opening and closing of the corresponding branch articulated chute. According to the articulated chute construction device, control over all pouring directions of mass concrete can be achieved conveniently, and meanwhile the whole articulated chute construction has the advantages of being easy and convenient to construct, low in cost and the like.
Owner:四川省建筑机械化工程有限公司

Construction on-line monitoring device and method for concrete top layer body of high-rise building

The invention relates to an on-line construction monitoring device and method for a concrete top layer body of a high-rise building, and the device comprises a cylindrical beam frame which is disposed on a steel reinforcement framework of the concrete top layer body of the high-rise building, and a resistivity / dielectric constant sensor (10), a vibration sensor (20), a temperature and humidity sensor (30) and an ultrasonic transmitting and receiving contact (40) which are disposed on the cylindrical beam frame. A resistivity / dielectric constant sensor (10), a vibration sensor (20), a temperature and humidity sensor (30) and an ultrasonic transmitting and receiving contact (40) are installed on a concrete top layer body in the construction process, and online parameter monitoring in the concrete pouring construction process is achieved through the resistivity / dielectric constant sensor (10) and the vibration sensor (20). Through a temperature and humidity sensor (30) and an ultrasonic transmitting and receiving contact (40), online parameter monitoring in the concrete pouring and curing process is achieved, and construction of a concrete top layer body of a high-rise building is achieved in the state that online parameter picking and monitoring are conducted to obtain a backup database. The technical problem that top layer quality control in mass concrete construction mainly depends on artificial experience and a single-parameter detection method is solved, and therefore the quality controllability and management efficiency of concrete top layer construction are improved.
Owner:THE SECOND CONSTR OF CHINA CONSTR EIGHTH ENG DIV +1

A method of mass concrete temperature monitoring and conditioning

The application discloses a mass concrete temperature monitoring and adjusting method and belongs to the technical field of mass concrete temperature monitoring and adjusting. In the existing mass concrete pouring process, internal temperature gradient is large, interlayer temperature difference is significant, cracks are easily caused, and structural durability is affected due to hydration heat release. Traditional methods rely on single-point threshold, have low spatial resolution, and cannot respond to the temperature change of concrete in real time. The application arranges temperature sensors in layers along cooling water pipes in a concrete pouring bin, and transmits data to an industrial computer in real time. Based on the collected internal temperature, cooling water inlet and outlet water temperature and environmental temperature, a three-dimensional temperature field is reconstructed in combination with thermodynamic parameters. Gradient change abnormal factors and interlayer mutation indexes are calculated to determine the abnormality. According to the determination result, the industrial computer dynamically adjusts the opening degree of the electric valve to realize layered local cooling. The application is suitable for mass concrete pouring, can effectively constrain the interlayer temperature difference, inhibit local high-temperature hot spots, and improve the engineering quality and safety.
Owner:SINOHYDRO BUREAU 14 CO LTD

Device for testing compression resistance of two ends of concrete member

The utility model belongs to the technical field of concrete strength detection instruments, and particularly relates to a compression resistance testing device for two ends of a concrete member, which comprises a base, a support plate fixed on the upper surface of the base and a pressurizing component arranged on the support plate, and four vertical guide columns are arranged between the base and the support plate. The pressurizing assembly comprises a telescopic cylinder and a movable plate, a plurality of door plates are movably connected between the supporting plate and the base, any guide column is composed of a long first stand column and a short second stand column, and the bottom end of the first stand column is detachably connected with a lifting assembly; the lifting assembly comprises a sleeve rotationally arranged on the base and a movable cylinder which is coaxial with the sleeve and is in threaded connection with the interior of the sleeve, and a groove is formed in the upper end face of the movable cylinder. And part of stand columns on the testing equipment can prevent concrete blocks from being put in, so that the working efficiency needs to be improved.
Owner:INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION

Mass concrete hydration heat cooling regulation method and system based on temperature difference control

This invention relates to the field of concrete pouring technology, and discloses a method and system for regulating the cooling of hydration heat in large-volume concrete based on temperature difference control. The method includes the following steps: Step S101, constructing a thickness temperature profile; Step S102, calculating the zone temperature difference and the cooling rate in the middle section; Step S103, calculating the equivalent age field; Step S104, calculating the time-varying elastic modulus and relaxation time; Step S105, constructing a base constraint weighting function; Step S106, calculating the constrained viscoelastic thermal stress field; Step S107, calculating the potential energy centroid drift intensity; Step S108, outputting control commands. This invention achieves multi-factor coupled calculation and multi-objective collaborative optimization for regulating the cooling of hydration heat in large-volume concrete, ensuring that cooling regulation aligns with the core requirements of crack resistance in engineering projects, thereby reducing the possibility of hydration heat cracking in concrete.
Owner:CHONGQING COMM CONSTR GRP

Concrete curing system and control method thereof

The invention provides a concrete curing system and a control method thereof.The concrete curing system comprises a windproof heat preservation cover arranged on a concrete structure in a covering mode and an environment regulation and control unit arranged in the windproof heat preservation cover; the method comprises the steps that target compressive strength information after concrete structure maintenance is completed and the actual temperature value and the actual humidity value in the windproof heat preservation cover are obtained; determining a temperature standard range value and a humidity standard range value required by the concrete structure in the curing process based on the target compressive strength information; and if the actual temperature value is outside the temperature standard range value or the actual humidity value is outside the humidity standard range value, controlling the environment regulation and control unit to correspondingly regulate the actual temperature value to be within the temperature standard range value or regulate the actual humidity value to be within the humidity standard range value. By applying the scheme, the technical problems of inaccurate temperature and humidity control and untimely response in the curing process of the mass concrete structure in severe environments such as mountainous regions can be solved.
Owner:CHINA THREE GORGES CORPORATION

A device for membrane curing of mass concrete and a method of use

The application discloses a kind of suitable for mass concrete film laying maintenance device and method, including the first drag frame of laying plastic film, laying geotextile second drag frame and water spraying conduit valve for watering, second drag frame is equipped with cast-in-place concrete, cast-in-place concrete below is equipped with water spraying position, the rear portion of first drag frame is equipped with first cutting die, and the rear portion of second drag frame is equipped with second cutting die.The application is suitable for mass concrete film laying maintenance device and method, once complete laying film, geotextile and the whole maintenance process of watering, improve work efficiency, save a lot of manpower, improve maintenance and cooling effect, can more quickly realize accurate control, improve mass concrete film laying maintenance efficiency, ensure that cast-in-place mass concrete can be timely laid film and watered and cooled.
Owner:CHINA CHEM SOUTH CONSTR INVESTMENT (JIANGXI) CO LTD

Intelligent control system and method for mass concrete temperature field

The invention provides an intelligent control system and method for a mass concrete temperature field, cooling pipes are buried in concrete in a layered manner, each layer of annular pipe is provided with a circulating valve, a distribution valve and a circulating pump, and is also provided with a second temperature sensor and a third temperature sensor which are used for detecting the water inlet temperature and the water outlet temperature; the first temperature sensor is used for detecting concrete temperature; the flowmeter is used for detecting water flow; the water tank is used for supplying water to the annular pipe; the annular pipes are a plurality of annular pipelines which are approximately concentrically arranged at equal intervals, and the diagonal positions of the annular pipelines are connected through communicating pipes which are arranged in a staggered mode. The circulating valve is arranged on the pipeline and used for switching the water flow direction of the annular pipe from outside to inside or from inside to outside; the distribution valve is arranged at a water outlet of the water tank and connected with the pipelines of all the layers. And the annular pipe is arranged, so that the temperature of the mass concrete can be better and more quickly adjusted, and the temperature field is more uniform. According to the control method, work is carried out by using the targets of reward and penalty functions of the artificial intelligence.
Owner:CHINA STATE RAILWAY GRP CO LTD +2

Grating vibration isolation foundation micro-vibration control construction technology

PendingCN121992813AAchieve full-frequency vibration controlAchieve Vibration ControlArtificial islandsProtective foundationTemperature controlVibration control
The invention discloses a micro-vibration control construction process for a grating vibration isolation foundation, and relates to the technical field of building construction. Comprising the following steps: S1, measuring and positioning: measuring and releasing sideline control piles of each shock insulation pier and a sand-gravel cushion layer; s2, construction of a graded gravel cushion layer; s3, compaction coefficient detection; s4, paying-off is conducted on the bottoms of the shock insulation piers, wherein the sideline control point of each shock insulation pier is measured and paid off; s5, side formwork installation and steel bar binding, wherein the distance between the vibration isolation pier and the equipment walkway foundation is 10 cm, a foam polyethylene plate with the thickness of 10 cm is adopted as the side formwork, and the side formwork and the steel bars are installed, bound and formed together; s6, mass concrete pouring and temperature control, wherein layered pushing type continuous pouring is adopted, and the thickness of each layer does not exceed 50 cm; s7, concrete curing; and S8, buffer seam treatment. The compaction graded gravel cushion layer is arranged as a vibration isolation filtering layer, and the large-scale independent vibration isolation pier body is combined, so that double isolation of earthquake dynamic response and environmental vibration is effectively realized, and stable operation of a precise instrument is ensured.
Owner:CHINA RAILWAY 10 BUREAU GRP NO 7 ENG CO LTD +1