611 results about "Mass concrete" patented technology

The invention relates to the technical field of temperature control, in particular to a mass concrete water cooling water temperature control method and system. The method comprises the following steps: collecting concrete key parameters through a multi-source sensor, constructing a microenvironment model based on information geometry, and generating a thermosensitive characteristic spectrum; forming a distributed thermodynamic model by utilizing a mutual information routing algorithm and heat-fluid-solid coupling analysis, and calculating an optimal cooling strategy; water flow path and flow optimization is realized in combination with fractional order particle swarm optimization; a pump set and a valve are adjusted through fuzzy self-adaptive control; and a potential instability region is identified through the spectrum energy gradient, and risk early warning is triggered. The precision and reliability of mass concrete cooling temperature control are remarkably improved, and intelligent, efficient and safe temperature control adjustment in the whole process is achieved.

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.

The invention relates to the technical field of building materials, in particular to anti-crack mass concrete and a preparation method thereof, and the concrete is prepared from a gelling system, composite aggregate, a gradient functional additive and water according to a specific ratio. The preparation method is achieved through premixing, gradient stirring and gradient temperature control curing, the three-stage expansion effect of the compound expanding agent is utilized to be matched with the concrete shrinkage process, the hydration heat inhibitor is combined for reducing the temperature peak, basalt fiber is used for reinforcing, and the cracking risk is quantitatively evaluated, so that the 28-day restrained expansion rate of the concrete reaches 0.012% or above, the cracking risk coefficient is smaller than or equal to 0.7, and the concrete has the good crack resistance. The hydration heat peak value is reduced to 48 DEG C or below, and the cement is suitable for engineering of ultra-long structures, large-volume side walls and the like, has no harmful cracks within one year or above, has crack resistance and mechanical properties, and is wide in application prospect.

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.

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.

The invention discloses an intelligent temperature control method and system, and belongs to the technical field of temperature control, and the method specifically comprises the steps: collecting the related data of a target region in real time; according to the relevant data of the target area, a four-field coupling dynamic prediction model is constructed, the temperature of the target area is predicted, the four-field coupling dynamic prediction model is constructed based on a four-field coupling model and the relevant data, collected in real time, of the target area, and the four-field coupling model is obtained based on simultaneous coupling of a basic field variable model; determining a cooling water pipe flow control strategy according to the predicted temperature of the target area; cooling the target area until the target temperature is reached; the temperature monitoring precision, the prediction accuracy and the control intelligence level of the mass concrete structure in the construction process are remarkably improved, the crack risk is effectively reduced, and the construction quality and the safety guarantee capacity are improved.

The invention discloses a temperature real-time monitoring method and system based on mass concrete continuous pouring, and the method comprises the steps: collecting data in a mass concrete continuous pouring process in real time through the arrangement of sensors, forming a global temperature set of temperature values at each collection moment, obtaining the temperature value of each layer at each collection moment according to pouring layering, and carrying out the real-time monitoring of the temperature of each layer; forming a layered temperature set of the temperature values of each layer; determining a concrete pouring abnormal index; determining a dynamic early warning threshold value in the concrete continuous pouring process, determining a multi-stage early warning and response mechanism according to comparison between the concrete abnormal index and the threshold value, and generating an early warning control signal; and based on the early warning control signal, controlling the water cooling equipment and carrying out real-time monitoring feedback. According to the method, the specific temperature conditions of each layer at different acquisition moments can be precisely known, the positions of the layers with abnormal temperature can be more precisely positioned, structural cracks caused by temperature incoordination between the layers are avoided, and real-time monitoring of the temperature of mass concrete continuous pouring is achieved.

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.

The invention belongs to the technical field of vibrating devices, and particularly relates to a vibrating device for large-volume concrete pouring construction of a fan foundation, the vibrating device comprises a vibrator, and one end of the vibrator is electrically connected with a vibrating rod through a connecting wire; a scraping mechanism is arranged on the surface of the vibrating rod, the scraping mechanism comprises a lantern ring fixedly connected to the surface of the vibrating rod in a sleeving mode, the interior of the lantern ring is hollow, an electric push rod is fixedly installed in the lantern ring, and a connecting rod is fixedly installed at the output end of the electric push rod; through reciprocating operation, concrete adhered to the surface of the vibrating rod can be quickly cleaned, so that the situation that the concrete on the surface of the vibrating rod is hardened and solidified, and subsequent cleaning is difficult is effectively avoided. And meanwhile, workers do not need to clean, so that the workload of the workers is reduced, and efficient cleaning operation can be achieved.

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.

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.

According to the mass concrete temperature field self-adaptive thermoelectric coordinated regulation and control system and method, the temperature difference between the inside and the outside of mass concrete is reduced through active directional heat transfer and self-adaptive thermal resistance regulation. The flexible thermoelectric thin film device prepared by the invention has high flexibility, high thermoelectric efficiency and strong environmental adaptability, and can meet the temperature control requirement of mass concrete, and the manufacturing process is compatible with the existing microelectronic processing technology, so that the flexible thermoelectric thin film device has large-scale production potential; the flexible thermoelectric device is attached to the surface of concrete, directional transmission of heat between the concrete and the thermoelectric module from a high-temperature area to a low-temperature area is achieved by switching the current direction through the Peltier effect, temperature balance is achieved completely through the active thermoelectric effect and passive heat conduction optimization, the temperature lag and durability defects of a phase change material are avoided, and the service life of the concrete is prolonged. And the heat transfer efficiency is improved through the heat conductivity coefficient gradient and the thermally induced variation characteristic of the gradient heat conduction interface material layer.

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.

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.

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.

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.

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.

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.

The invention discloses a mass concrete pouring temperature control method, system and equipment and a medium, and relates to the technical field of mass concrete pouring. The method comprises the steps that a mass concrete pouring structure layer is constructed; a temperature boundary condition is applied to the pouring structure layer, temperature field simulation of the pouring structure layer is carried out based on the temperature boundary condition, and temperature distribution characteristics in the pouring structure layer are obtained; based on the temperature distribution characteristics in the pouring structure layer, crack characteristics of the pouring structure layer under the temperature effect are determined; constructing a function relationship among the crack characteristics, the temperature distribution characteristics and the pouring parameters by adopting a pre-constructed bidirectional long-short time neural network; and inputting the function relationship, the real-time temperature information and the real-time crack information into an improved particle swarm algorithm for optimization, outputting an optimal pouring parameter of the function relationship when an iteration condition is met, and pouring the mass concrete based on the optimal pouring parameter.

The invention discloses a design method, system and equipment of a mass concrete structure water cooling system, and belongs to the technical field of concrete structure design. Aiming at the problems of large calculation amount, long time consumption and multiple trial calculation times in the design of the existing mass concrete structure water cooling system, the method comprises the following steps: establishing a concrete structure surface temperature field model by combining a heat conduction theory, a hydration heat model and a cooling water pipe heat absorption effect; based on the principle of energy conservation, under the boundary condition, an energy time-history change model of the concrete structure at each moment and an internal temperature model of the concrete structure in the temperature rise stage are established, the length of a cooling water pipe is determined, and the cooling water pipe is arranged; and finally determining the cooling rate and the cooling water flow rate of the concrete structure in the cooling stage to complete the design of the concrete structure water cooling system. According to the method, excessive finite element trial calculation can be avoided, the design efficiency is improved, the construction risk is reduced, and the quality and durability of the concrete structure are ensured.

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.

The invention relates to the technical field of bridge manufacturing, in particular to a bridge concrete pouring system and a control method thereof. According to the pouring system, the cold insulation device for controlling the temperature of the concrete and the material distribution device comprising the multiple pouring pipes for synchronous pouring are arranged, and the flow of the pouring point of each material distribution pipe is further accurately adjusted through the twin control platform. And the pouring flatness is ensured while the temperature of the poured concrete and the pouring uniformity are ensured. According to the scheme, from a mixing station to a pouring point, the cold insulation device wraps concrete all the time, heat loss and environment temperature influences in the transportation and waiting process are reduced to the maximum extent, through temporary storage and temperature control of the cold insulation device, the mold entering temperature can be effectively controlled, the risk of high-temperature exposure or low-temperature freezing is greatly reduced, and the production efficiency is improved. The problems that the initial setting time is shortened and the flowability is reduced due to temperature can be effectively avoided, and mass concrete temperature cracks are prevented.

The utility model discloses a mass concrete cooling and curing device which can be better installed by installing a cooling water embedded pipe in mass concrete in a segmented mode, and the two ends of the cooling water embedded pipe section are both located on the outer side of the concrete. The cooling water embedded pipe sections are sequentially connected end to end through connecting bent pipes so that the cooling water embedded pipe sections can be connected together in series to form a cooling pipeline, and the two ends of the connecting bent pipes are connected with the cooling water embedded pipe sections through movable connectors. When one cooling water embedded pipe section goes wrong, the other cooling water embedded pipe sections can still be communicated and circulated, and therefore the problem that the whole pipeline is scrapped due to blockage can be effectively solved. And the spraying curing device is additionally arranged on the connecting pipeline located on the uppermost side, the temperature of curing water can be consistent with the internal temperature of concrete through semi-automatic curing, concrete forming is better facilitated, temperature cracks are avoided, and the cooling curing control effect can be better achieved on the whole.

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.

The invention discloses high-crack-resistance and corrosion-resistance marine mass concrete based on an aluminoferrite-magnesium phosphate composite gel system and a preparation method thereof. The method comprises the following steps: 1, pretreating 35-50 parts by mass of aluminoferrite cement, 25-40 parts by mass of magnesium phosphate cement, 5-15 parts by mass of phosphorus slag powder and 10-20 parts by mass of lithium slag powder; 2, premixing the iron aluminate cement, the magnesium phosphate cement, the phosphorus slag powder and the lithium slag powder which are pretreated in the previous step; 3, 1-3 parts by mass of an ion erosion inhibitor and 2-4 parts by mass of a hydration heat regulating agent are added into the slurry obtained through premixing in the previous step, 0.5-2.0 parts by mass of temperature shrinkage fibers are doped, and concrete slurry is obtained after ultrasonic dispersion is conducted for 15 min or above; 4, after the slurry obtained in the previous step is poured, the high-crack-resistance and corrosion-resistance marine mass concrete is obtained. By adopting the method disclosed by the invention, the marine mass concrete with high crack resistance and corrosion resistance can be prepared.

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.

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.

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.

The invention discloses a mass concrete early-age strain monitoring method in a multi-field coupling state. The method comprises the following steps: S1, assembling a strain gauge; s2, carrying out sensitivity calibration on the assembled strain gauge; s3, before the strain gauge is embedded and installed, temperature rise-drop characteristics of the concrete hydration process are simulated in a standard temperature box, and a temperature sensitivity test of a substrate of the strain gauge is conducted, specifically, the correlativity of thermal strain-temperature in the temperature rise process and the temperature drop process is established; s4, temperature monitoring sensors are installed at the strain gauge installation points at the same time, and therefore the temperature monitoring value of concrete and strain gauge time synchronization is obtained; s5, after the strain gauge is pre-embedded and installed, accessing a data automatic acquisition and remote transmission system to realize key-controlled remote terminal data storage; and S6, constructing a remote data synchronous processing system, and realizing synchronous automatic acquisition and synchronous analysis processing of strain and temperature of each measuring point. According to the invention, the method is suitable for strain in-situ automatic monitoring in the whole maintenance process of the mass concrete structure.

The invention discloses mass concrete for a water-saving ship lock and a preparation method of the mass concrete. The mass concrete for the water-saving ship lock is prepared from the following raw materials: 252 to 282 parts of moderate-heat anti-cracking cement, 100 to 118 parts of anti-cracking admixture, 235 to 255 parts of phase change sand, 180 to 200 parts of natural sand, 980 to 1020 parts of coarse aggregate, 155 to 170 parts of water and 5 to 7 parts of water reducing agent. The moderate-heat anti-cracking cement is used for replacing ordinary Portland cement, the anti-cracking admixture is used for replacing conventional admixtures such as coal ash mineral powder, and the phase change sand is used for replacing part of natural sand as fine aggregate, so that hydration temperature rise and temperature drop stress of the mass concrete are effectively inhibited; the straw fiber is modified by the modifier, the capability of cellulose and lignin in the straw fiber in participating in cement hydration reaction is excited, the binding power of the fiber and a concrete matrix interface transition area is improved, and waste associated with agricultural products such as straw and chaff can be utilized with high value while the anti-cracking capability of the concrete is improved.