989 results about "Cofferdam" patented technology

The invention relates to the technical field of river bank protection, in particular to a river bank slope protection for cofferdam construction and a construction method thereof. S2, construction of a near-water area structure; s3, construction of a far water area structure; s4, ecological enhancement; triple optimization of river bank protection is achieved through dynamic water level monitoring and modular design, a double-layer reinforced concrete and elastic sealant structure is adopted in a near-water area, the compressive strength is improved by 20%, the crack width is smaller than or equal to 0.2 mm, and material waste is reduced by 15% in cooperation with dynamic width adjustment (+ / -2 m); the mold bag concrete slope protection is combined with an atomization spraying system, the anti-scouring capacity reaches 5 m / (m.s), the vegetation coverage rate is larger than or equal to 80% within 3 months, and the water and soil loss rate is reduced by 70%; the modular honeycomb structure inflation assembly efficiency is improved by 40%, the transportation cost is reduced by 50%, the distributed sensors achieve structure displacement / pressure three-level early warning, the operation and maintenance cost is reduced by 70%, the overall service life is prolonged by more than 5 years, and an ecological-engineering collaborative protection system is formed.

The invention relates to the technical field of underwater engineering, and discloses a steel pipe pile cofferdam and a cofferdam construction method.The steel pipe pile cofferdam comprises a plurality of steel pipe columns, the two sides of each steel pipe column are each provided with a first lock catch and a second lock catch which extend in the length direction of the steel pipe column, and steel pipe piles are buckled in pairs through the corresponding first lock catches and second lock catches; a sealing cavity is formed between the first lock catch and the second lock catch, and the sealing cavity is sequentially divided into a sealing cavity, an induction cavity and a grouting cavity from the outer side to the inner side of the cofferdam; the sealing cavity and the sensing cavity are separated through the elastic water stop lips, and shape memory alloy wires are arranged in the elastic water stop lips. The cofferdam has the beneficial effects that the first layer of sealing structure is formed by arranging the mechanical seal, then the second layer of sealing structure and the third layer of sealing structure are formed by the elastic water stop lip and the grouting area, and water located on the outer side of the cofferdam is prevented from entering the inner side of the cofferdam step by step through the three layers of sealing.

The invention relates to the technical field of water conservancy control, and discloses a water conservancy project cofferdam gate control system based on a PLC, and the system comprises a hydraulic drive and detection assembly and a controller. A discrete state observation module, a disturbance characteristic identification module, a virtual axis parameter scheduling module and a control law synthesis module are configured in the controller. The discrete state observation module reconstructs a system state and estimates total disturbance; the disturbance characteristic identification module judges normal, jamming or turbulent working conditions according to the disturbance characteristics; the virtual axis parameter scheduling module adjusts the virtual stiffness and the damping coefficient in real time according to the working condition, or executes an asymmetric auxiliary escape strategy; the control law synthesis module combines state feedback and feed-forward compensation to generate a control voltage. Through multi-modal parameter scheduling, water flow impact and non-linear friction interference are effectively overcome, decoupling under the turbulent working condition and flexible protection and auxiliary escape under the jamming working condition are achieved, and the synchronization precision and safety of gate control are improved.

The invention relates to the technical field of water conservancy project cofferdam construction, and discloses a cofferdam backfill supporting device which comprises a filler pipeline, a guide part is arranged on the filler pipeline, a positioning groove is formed in the outer wall of the filler pipeline, a supporting part is arranged on the filler pipeline, and the supporting part comprises a first supporting ring and a second supporting ring. The first supporting ring is slidably connected with the outer wall of the filling pipeline, a support is fixedly connected between the first supporting ring and the second supporting ring, a positioning part is arranged on the support and comprises a rod sleeve, and the rod sleeve is fixedly connected to the support. The guiding part and the supporting part are matched to avoid inclination and deviation of the pipeline, the positioning part and the calibration part are matched to improve the hole site calibration precision, the limiting part achieves conflict-free switching between the calibration part and backfill material injection, finally it is guaranteed that backfill materials are evenly filled, the problems of scattering and cavities do not exist, and the requirements for cofferdam impermeability and structural stability are met.

The invention relates to the technical field of water conservancy projects, in particular to a cofferdam for ship lock transformation and a construction method. A cofferdam for ship lock transformation comprises concrete cofferdam bodies and hollow concrete supporting structures, the concrete cofferdam bodies are tightly attached to the wall faces on the two sides of a ship lock and extend in the water flow direction, and the hollow concrete supporting structures are arranged between every two adjacent concrete cofferdam bodies. The hollow concrete supporting structure is fixedly connected with the concrete cofferdam body through a connecting device, the hollow concrete supporting structure comprises a bottom layer, a hollow layer and a top layer, a plurality of rows of cavities arranged side by side are formed in the hollow layer, and blasting devices are pre-buried in the concrete wall between every two adjacent cavities at equal intervals. The concrete cofferdam body is tightly attached to the wall face of the ship lock, a stable water retaining barrier can be formed, the self weight can be reduced through the design of the hollow layer, and compared with traditional mechanical or manual dismantling, efficient and controllable dismantling can be achieved through the blasting device embedded in the supporting structure, and the construction period can be greatly shortened.

The invention relates to the technical field of water conservancy projects, in particular to an anti-seepage control system for an earth rock cofferdam. The method comprises the following steps: periodically acquiring external hydro meteorological data and internal structure response data of a cofferdam through a sensor group based on a monitoring unit; establishing a multi-field coupling model based on a finite element method through a model building unit, and dynamically coupling a wave load, a tidal water level and an osmotic pressure field; the minimum cofferdam crest elevation is determined by comparing the difference between the minimum safety coefficient and a preset safety coefficient on the basis of a decision-making unit; and based on the analysis unit, inputting the minimum cofferdam crest elevation into the multi-field coupling model to obtain the maximum value of the hydraulic gradient of the escape point of the downstream slope within a third preset time period, determining an anti-seepage state based on the maximum value, and adjusting related parameters based on the anti-seepage state. The seepage risk of the cofferdam is monitored, predicted and actively controlled in real time, so that the seepage rate of the earth rock cofferdam is reduced.

The invention discloses an irrigation channel maintenance cofferdam system and a maintenance method, the system comprises a vehicle body with an arm, a rotating device, a cofferdam device and a sealing structure, a cantilever is hinged to the tail end of a working arm of the vehicle body with the arm, the rotating device is mounted at the lower end of the cantilever, and the cofferdam device is mounted at the lower end of the rotating device; the cofferdam device comprises a first baffle and second baffles, the two second baffles are installed at the left end and the right end of the first baffle correspondingly, an included angle is formed between each second baffle and the first baffle, and sealing structures are installed on the lower sides of the first baffle and the second baffles and the sides, away from the first baffle, of the second baffles correspondingly. A connecting base is installed on the upper side of the first baffle and connected with the rotating device. When the cofferdam device is installed, the cofferdam device is fixed through the working arm of the truck body with the arm, and the cofferdam device is more convenient to install.

The invention belongs to the technical field of crossing of artificial intelligence and computational mechanics, and particularly relates to an artificial intelligence-based MPM simulation method and system for a mold bag sand cofferdam, a three-dimensional simulation system of the mold bag sand cofferdam is constructed in combination with an MPM method, and the penetration state of sand and geotechnical cloth is detected in an accelerated manner by utilizing a penetration tracking algorithm and spatial Hash. An artificial intelligence algorithm is introduced, a reward function is designed with minimum penetration depth and penetration times as targets, penetration prediction of MPM particles is driven, the speed and stress of the MPM particles are further dynamically regulated and controlled on the basis of a predicted contact model and the artificial intelligence algorithm, penetration is prevented, numerical stability is ensured, and the prediction accuracy of the MPM particles is improved. The calculation precision is improved by adopting implicit integration and gradient descent methods; and bidirectional coupling of the sand and the geotechnical cloth is realized through a visualization module. The problems that in a traditional method, coupling simulation of sandy soil and a flexible structure is low in efficiency, easy to penetrate, unstable in numerical value and the like are solved, and the accuracy and reliability of simulation analysis of the mold bag sand cofferdam structure under the complex working condition are remarkably improved.

The invention belongs to the technical field of bridge engineering, and particularly relates to a deepwater lock catch steel pipe pile cofferdam construction method which comprises the following steps: construction preparation: delimiting a steel pipe pile cofferdam area; drilling and groove milling are carried out along the steel pipe pile cofferdam area to form a cofferdam groove, and sandy soil is backfilled in the cofferdam groove; a guide device is lowered along the bored pile steel casing, and steel pipe piles are inserted one by one to form a steel pipe pile cofferdam; a plurality of inner supporting systems are assembled; a covering layer is excavated on the inner side of the steel pipe pile cofferdam to the designed elevation; underwater grouting is conducted on the inner sides and the outer sides of the steel pipe piles located in the cofferdam grooves; the multiple inner supporting systems are sequentially lowered to the designed elevation; a gap between each enclosing purlin structure and the steel pipe pile is checked; the bottom of the foundation pit is cleaned, water is pumped layer by layer, and concrete is poured between the enclosing purlin structure and the steel pipe piles till water pumping in the cofferdam is completed; the bearing platform / pier body is constructed, and backwater of the corresponding inner supporting systems is sequentially removed along with construction of the bearing platform / pier body till water flows out of the bearing platform / pier body; and dismantling the steel pipe pile cofferdam.

The invention relates to the technical field of steel sheet pile cofferdams, in particular to a deep and long steel sheet pile cofferdam structure which comprises two steel pipe sets symmetrically distributed front and back, each steel pipe set is composed of a plurality of steel pipes linearly and evenly distributed, and a steel sheet pile is jointly connected between every two adjacent steel pipes. The deep and long steel sheet pile cofferdam structure further comprises a plurality of supporting mechanisms, and the supporting mechanisms are evenly distributed on the front sides and the rear sides of the two steel pipe sets. The sealing limiting parts and the supporting parts are alternately distributed and connected with each other, so that the multiple sealing limiting parts and the multiple supporting parts form a whole, two gaps with the same structure and adjacent positions are mutually complemented, force transmission can be conducted between the multiple sealing limiting parts and the multiple supporting parts, stress is uniform, and the sealing effect is good. And therefore, the overall supporting and limiting strength of the multiple sealing and limiting parts and the multiple supporting parts on the multiple steel pipes and the multiple steel sheet piles is improved, and the phenomenon that the single section of the cofferdam deforms is avoided.

The invention discloses a shared lock catch steel pipe pile cofferdam close to a bridge bearing platform under a high-speed railway line and a construction method, and the shared lock catch steel pipe pile cofferdam close to the bridge bearing platform under the high-speed railway line comprises a first lock catch steel pipe pile, a second lock catch steel pipe pile, a third lock catch steel pipe pile and a fourth lock catch steel pipe pile, the third lock catch steel pipe pile and the fourth lock catch steel pipe pile are connected with the first lock catch steel pipe pile and the second lock catch steel pipe pile. The lock catch steel pipe pile cofferdam is adopted to replace a double-wall steel cofferdam, the problems that the clear distance close to a bridge bearing platform is too small, and no space exists for independently arranging an overwater steel cofferdam are solved, and under the condition that two projects are both control projects and need to be constructed synchronously, a row of shared lock catch steel pipe piles are inserted in the middle to be used in the construction stage of the two bridge bearing platforms at the same time; an independent and separated cofferdam stress system is formed, the condition of synchronous construction of the two newly-built bridges is guaranteed, the using number of the steel pipe pile cofferdams is reduced, and material consumption is reduced.

The present invention relates to the technical field of water conservancy engineering, and specifically to a cofferdam for ship lock reconstruction and a construction method. A cofferdam for ship lock reconstruction comprises a concrete cofferdam body and a hollow concrete support structure. The concrete cofferdam body is closely attached to the walls on both sides of the ship lock and extends along the direction of water flow. The hollow concrete support structure is arranged between two adjacent concrete cofferdam bodies. The hollow concrete support structure is fixedly connected to the concrete cofferdam body by a connecting device. The hollow concrete support structure comprises a bottom layer, a hollow layer, and a top layer. Multiple rows of cavities arranged in parallel are formed inside the hollow layer. Blasting devices are equidistantly embedded in the concrete wall between two adjacent cavities. This application forms a stable water retaining barrier by placing the concrete cofferdam body close to the ship lock wall. The hollow layer design can reduce its own weight. In addition, the blasting device embedded in the support structure can achieve efficient and controllable demolition compared to traditional mechanical or manual demolition, which can greatly shorten the construction period.

The utility model discloses an embankment danger removal and reinforcement combined type movable cofferdam which comprises a cofferdam assembly I and a cofferdam assembly II, and is characterized in that hollow cavities are formed in the cofferdam assembly I and the cofferdam assembly II at the middle joints of notches; the hollow cavities in the first cofferdam assembly and the hollow cavities in the second cofferdam assembly are in a circular shape after being combined. The combined type movable cofferdam has the beneficial effects that by arranging a group of expansion type filling sealing structures consisting of the filling air bags, the air bag end parts, the connecting parts, the communicating pipes, the electronic barometers and the air pumps, when the combined type movable cofferdam is combined and connected or is used after being combined, when the cofferdam slightly vibrates or displaces accidentally, the cofferdam can be filled with the filling air bags; when the combined type movable cofferdam is in butt joint, the butt joint gap can be expanded, at the moment, the filling air bag is subjected to flexible deformation expansion under the action of internal stored air pressure, the expanded gap can be filled, the water blocking effect of the filling air bag is ensured, and the overall water blocking effect of the combined type movable cofferdam is more ideal.

The invention relates to the technical field of Larsen steel sheet pile construction, and discloses a Larsen steel sheet pile cofferdam construction method suitable for a deepwater area, which comprises the following construction steps: 1) arranging a construction platform; (2) four positioning piles are driven into the construction position to form a construction area; 3) arranging a guide frame in the construction area, wherein the guide frame is provided with a guide arm; (4) a plurality of Larsen steel sheet piles are driven along the guide arms, the bottoms of the Larsen steel sheet piles extend into the solid soil layer, and adjacent Larsen steel sheet piles are arranged in a sealed mode; (5) enclosing purlins are arranged on the pile rows, and steel supports are arranged between the enclosing purlins to form an inner supporting structure; (6) water and sludge in the construction area are sucked till the solid soil layer is exposed at the bottom, and the Larsen steel sheet pile cofferdam is formed by the multiple Larsen steel sheet piles and the multiple inner supporting structures; the bottoms of the Larsen steel sheet piles extend to a solid soil layer and are arranged in a sealed mode, and a plurality of inner supporting structures are arranged, so that the water stopping performance of the cofferdam is improved, and meanwhile the stability and the water flow impact resistance are enhanced.

The utility model relates to the technical field of steel sheet pile cofferdams, in particular to a detachable cofferdam module for flood control engineering, which comprises a steel sheet pile structure, connecting buckle structures are fixed on two opposite side surfaces of the steel sheet pile structure, each connecting buckle structure comprises a first inserting buckle and a second inserting buckle, and a hollow area is arranged in a steel sheet pile. And a plurality of triangular support frame structures are fixed in the hollow area. The steel sheet pile solves the problems that two adjacent steel sheet piles in the prior art cannot be installed at a right angle or a smaller angle during installation, the structure is simple, and the steel sheet piles are easy to bend.

The invention relates to the technical field of cofferdams, and discloses a cofferdam auxiliary lattice reinforcing mechanism which is mounted on a cofferdam, the cofferdam comprises two cylindrical main lattices, a first arc auxiliary lattice, a second arc auxiliary lattice and a filling body, the first arc auxiliary lattice and the second arc auxiliary lattice are connected between the two cylindrical main lattices, and the filling body is filled between the first arc auxiliary lattice and the second arc auxiliary lattice. The reinforcing mechanism comprises a conduction device, the two ends of the conduction device are connected to the side walls of the two cylindrical main grids respectively, the conduction device is arranged between the filling body and the first arc auxiliary grid or the second arc auxiliary grid and provided with a first stress side and a second stress side which are opposite in direction, the first stress side is connected with the filling body, and the second stress side is connected with the second arc auxiliary grid. The second stress side is connected with the first arc secondary grid or the second arc secondary grid; when the first arc auxiliary grid or the second arc auxiliary grid bears an external load, the external load can be transmitted to the cylindrical main grid through the transmission device, and meanwhile, the filling body applies pressure opposite to the external load to the first stress side. The cofferdam has the advantage that the overall strength of the cofferdam can be improved.

The invention discloses a dredged mud upper and lower part double-face combined vacuum consolidation drainage method, which comprises the following specific implementation processes: laying a horizontal sand bag containing a PVC (Polyvinyl Chloride) pipe and a vertical drainage pipe at the bottom of a cofferdam foundation pit to serve as a bottom drainage system, blowing and filling dredged mud in a layered manner, controlling the thickness and the water content of each layer, and when the water content of a soil body is lower than twice liquid limit, stopping drainage; starting the bottom vacuum water pumping device to perform preliminary water drainage, inserting straw bundles into the soil body through hollow pipes with bottom covers to form a vertical water drainage structure after the strength of the soil body meets the requirement, sequentially laying geotechnical cloth, a straw woven blanket, a PVC water drainage pipe network and a sealing film on the top to construct a top vacuum system, and finally synchronously starting the top vacuum water pumping device and the bottom vacuum water pumping device. The vacuum difference is controlled by adjusting the ventilation device, and upper and lower double-face combined vacuum consolidation drainage is achieved. The drainage consolidation of the dredged mud is effectively accelerated, the treatment efficiency is improved, and the drainage effect is enhanced through precise control over the vacuum degree and application of materials such as straw.

The invention relates to a water and land construction rapid filling method suitable for a cofferdam with cohesive soil at a soil taking point. The water and land construction rapid filling method comprises the following steps of A, underwater throwing filling, B, overwater turning filling and C, land filling of a dam core. Water throwing and land throwing are combined, cofferdam forming is accelerated, inland river conventional equipment is adopted for overwater construction, construction organization is facilitated, adopted dredgers are backhoe dredgers and grab dredgers which are commonly used for earth cutting in inland rivers, and the ships are shallow in draught, convenient to transport in the inland rivers, free of weather influence, capable of working continuously, capable of saving the construction period, capable of reducing soil disturbance and convenient to throw and fill water. The overall stability of the cofferdam can be improved, earthwork balance is achieved, cost is saved, environment friendliness is achieved, and good social and economic benefits are achieved.

The invention discloses a digital twinning-AI prediction driven cofferdam directional micro-blasting system, which relates to the technical field of underwater blasting engineering, and comprises the following steps of: constructing multi-domain digital twinning, reading a compliance rule machine by a loading machine, fusing a hydrophone array, shore-based vibration and distributed optical fiber observation assimilation to form a baseline field; defining an isobaric surface leakage volume, a sector deflection angle, a closure degree and a frequency band energy ratio, and establishing two sets of equivalent boundary admittances and preselection of a switchable physical layer; training a multi-output AI element model, combining opportunity constraint and hard constraint, performing linkage optimization on a physical layer and a detonation network, and generating a linkage instruction and a sensitivity atlas; and small-dose trial explosion is executed by a hierarchical correction state machine, and on-line guarding and knowledge writing-back are carried out in combination with sequential ratio test and quantile tracking. And minute-level interpretable prediction can be realized, leakage and direction drift are inhibited, the safety of an ecological structure is guaranteed, and the construction period and the cost are reduced.

The invention discloses a combined revetment for channel reinforcement and a construction method thereof, the combined revetment comprises stress piles and insert plate piles, the stress piles are inserted along the edge of a channel, one insert plate pile is inserted between every two adjacent stress piles, each stress pile is at least connected with one anchor rod used for pulling and fixing the stress pile, anchor holes corresponding to the anchor rods are formed in the stress piles, and the insert plate piles are inserted into the anchor holes. The anchor hole is of a contracted structure from the upstream face of the stress pile to the downstream face of the stress pile and forms installation guiding and limiting on the anchor rod, and the two side edges, connected with the insertion plate pile, of the stress pile are each provided with a stopping part used for limiting the insertion plate pile to move in the upstream face direction of the insertion plate pile. The combined revetment has the beneficial effects that the combined revetment and a navigation shore are connected into a whole, the structure stress condition is optimized, the revetment function is enhanced, rapid reinforcement of a navigation channel is facilitated, the cost is low, and the adverse effect of a reinforcement structure on the navigation width is reduced to the maximum extent; underwater construction can be achieved through the arrangement of the anchor hole structure, cofferdams do not need to be built, the influence on navigation is small, and the construction efficiency and safety are effectively improved.

The utility model relates to a high-pressure jet grouting cutoff wall clay core wall earth rock cofferdam construction structure which comprises the following steps: S1, surveying and lofting by a surveying ship, and determining a block stone throwing and filling area; s2, rubble embankment riprap filling and dynamic elevation re-checking are carried out; s3, filling construction of a clay core wall in a central area; s4, construction of the high-pressure jet grouting expansion diaphragm wall; and S5, anti-seepage construction of the composite geomembrane of the upper slope section is conducted. According to the construction method of the clay core wall earth rock cofferdam of the high-pressure jet grouting cutoff wall, the construction speed is high, the anti-seepage effect is good, and the construction technical defects that in the construction process of an existing deepwater earth rock cofferdam, the riprap precision is low, the high-pressure jet grouting cutoff wall leaks slurry, the anti-seepage effect of an upstream slope is poor and the like are overcome; the construction method has the construction advantages of high stability, high efficiency, high benefits and the like during implementation, and the technical benefits are remarkable.

The invention discloses a cofferdam staging construction method which comprises the following steps: on the basis of the overall design of a cofferdam, adding a first-stage cofferdam design, and transversely dividing a river channel into a main river channel and a non-main river channel according to hydrological survey information; the first-stage cofferdam comprises an upstream cofferdam, a downstream cofferdam and a first-stage cofferdam overflowing riprap protector from a bank slope on one side of a non-main riverway to a main riverway joint part; the second-stage cofferdam is combined from a bank slope on one side of the main river channel to the first-stage cofferdam to form an integral Meanwhile, a first-stage cofferdam flood season flood season scheme is designed; according to the method, cofferdam filling construction is involved in advance before river closure, and cofferdam implementation is completed in two dry periods; construction of the cofferdam anti-seepage wall is involved in advance, the construction period of the cofferdam anti-seepage wall is prolonged, and equipment needed for construction of the cofferdam anti-seepage wall is greatly reduced; the cofferdam is filled by stages, so that the use efficiency of earthwork equipment is improved; the cofferdam is constructed by stages, so that the construction time of the cofferdam is prolonged, and the construction period of the cofferdam is better guaranteed; and through effective protection measures, the first-stage cofferdam flood safety is guaranteed.

The invention relates to a comprehensive construction method for a Larsen steel sheet pile cofferdam of an anti-typhoon cross-sea bridge. The comprehensive construction method comprises the steps that firstly, BIM and VR application is conducted; 2, construction preparation is conducted; thirdly, a first enclosing purlin is installed, and steel sheet piles are driven in an inserted mode; fourthly, steel enclosing purlins and water stops are installed; 5, bottom sealing concrete is constructed; sixthly, the elevator cage is installed; seventhly, a bearing platform is constructed; eighthly, dismantling construction is conducted; ninthly, the steel sheet piles are recycled; and step 10, intelligent monitoring application. The construction challenges caused by complex landforms at the bottom of the foundation are effectively overcome by adopting targeted construction measures, the resistance to typhoon and storm impact is enhanced, corresponding improvement measures are integrated in all construction processes, and positive effects are achieved.

The invention relates to the technical field of engineering construction optimization, in particular to a cofferdam filling construction scheme optimization method and system.The method comprises the following steps that cofferdam filling construction partitions are divided along the axis of a cofferdam, and a three-dimensional coupling numerical model is established based on hydrogeological parameters and engineering design parameters of the cofferdam filling construction partitions; performing transient seepage stability analysis on the cofferdam filling construction subarea to obtain a critical filling rate; in combination with the critical filling rate, a partition construction collaborative model is established based on a core engineering target, so that a cofferdam filling construction initial scheme is generated; the cofferdam filling construction initial scheme is executed, cofferdam filling state parameters are monitored, and construction risk early warning information is obtained; and dynamically adjusting the cofferdam filling construction initial scheme according to the construction risk early warning information to obtain a cofferdam filling construction optimization scheme. According to the method, the cofferdam filling construction scheme is dynamically optimized, and the safety, the high efficiency and the intelligent level of cofferdam filling construction are improved.

The invention relates to the technical field of impermeable membrane laying, and discloses an adjustable impermeable membrane laying machine of an earth rock cofferdam back slope type impermeable dam, which comprises a workbench, a moving device, a membrane spreading device and a membrane laying device, the moving device comprises a first bracket, a coupler, a first rotating shaft and a moving wheel; the film spreading device comprises a second support, a film spreading auxiliary roller, a second bearing, a third rotating shaft, a third chain wheel, a second chain and a fourth chain wheel, and the film laying device comprises a vertical plate, a first bearing, a mounting block, a fixing plate, a first spring, a limiting plate, a positioning plate, a first threaded hole, a first bolt, a first chain wheel, a first chain, a second chain wheel and a laying roller. The device further comprises a film pressing device, a film cutting device and a supporting device. According to the device, through linkage adjustment of the rotating speed of the first rotating shaft and the rotating speed of the film spreading auxiliary roller, the laying efficiency and quality are effectively and cooperatively improved, the precision of a notch is improved through the cutting assembly, and hot melting of an anti-seepage film in the later period is facilitated.

The invention relates to the technical field of cofferdams, in particular to a steel casing cofferdam construction device and a construction method.The steel casing cofferdam construction device comprises a casing and an anti-deviation assembly, the casing is used for preventing water, and the anti-deviation assembly is arranged on the casing and comprises a movable plate and a sliding seat; the multiple sliding seats are arranged on the inner wall of the pile casing and distributed at intervals in the circumferential direction of the pile casing, each sliding seat is in sliding fit with one movable plate, the movable plates can move up and down relative to the pile casing, the movable plates are arc-shaped plates, the radian of the arc-shaped plates is the same as that of the pile casing, and the movable plates can move up and down relative to the pile casing. The movable plate is attached to the inner wall of the pile casing. According to the steel pile casing cofferdam construction device and the construction method thereof, the foundation pit is excavated firstly, then the pile casing is placed in the foundation pit, the movable plate is inserted into the bottom of the foundation pit to support the pile casing, the pile casing is prevented from inclining, and therefore the problem that the cofferdam is difficult to be driven into the foundation pit due to the existence of a large number of stones is avoided.

The invention relates to the technical field of bridge construction safety monitoring, discloses a bridge cofferdam construction safety evaluation system and method based on data real-time analysis, and solves the problems of scattered and heterogeneous monitoring data, inaccurate safety state prediction and long risk response time in the prior art. Specifically, multi-dimensional physical parameters of the cofferdam structure and the surrounding environment of the cofferdam structure are collected in real time through a multi-source sensor network; carrying out preprocessing and space-time alignment on the collected original data; inputting the preprocessed fusion data into a dynamic risk assessment model integrated with a random forest and a long-short-term memory network, and predicting a safety state evolution trend of the cofferdam structure in a future time period; and generating graded early warning information and disposal suggestions according to the prediction result, and pushing the information and suggestions to the site construction terminal. According to the technical scheme, fusion and space-time registration of monitoring data are realized, the perspectiveness and accuracy of safety state prediction are improved, the risk response time is shortened, and the intelligent level of engineering management is improved.

The invention discloses a curing agent for curing and damming solid waste and a layer-by-layer cofferdam damming process, and relates to the technical field of damming filler devices. The curing agent is characterized in that a guide and discharge device with a guide and regulation effect is arranged on the front side of a preparation device; a reclaimed water device with filtering and flow guiding functions is arranged on the side face of the preparation device, and the industrial solid waste environment-friendly treatment, solidification and accumulation technology is adopted, so that equipment machining automation is achieved; according to the process of stirring industrial solid waste and reclaimed water according to a ratio, adding a curing agent according to a classified ratio of the industrial solid waste, conveying by a pipeline, curing and building a weir, repairing a pool on a pool, forming a central emergency pool, stacking and storing, and greening the solid, the dust pollution after stacking is reduced, the storage capacity can be increased, the service life is prolonged, and the environmental pollution is reduced. The effect after layered solidification and accumulation is similar to that of a terraced field, vegetation greening is carried out after soil covering, and the industry is recovered and improved step by step.

The invention discloses a cofferdam pond gate control system based on the Internet of Things, and belongs to the technical field of gate control, and the cofferdam pond gate control system specifically comprises the steps that a data acquisition module obtains satellite tide data and meteorological monitoring data through an Internet of Things control center; the tide level prediction module inputs the two types of data into a multi-model fusion mechanism, integrates an astronomical tide model based on gravity calculation and a meteorological tide model based on wind pressure coupling, and generates a comprehensive tide level curve according to dynamic weight fusion; the height analysis module determines the upper limit of the opening height in the flood period by taking the real-time tide level as the reference flushing retarding interval according to the comprehensive tide level curve, and dynamically adjusts the theoretical opening height of the water changing port in combination with the water head rate in the ebb period; the gate control module generates a gate lifting instruction and issues the gate lifting instruction to the driving unit through the Internet of Things to control the sectional type sealing plate to act, and it is ensured that the error between the actual opening height and the theoretical value is within the preset range; according to the invention, environment dynamic response of tide regulation and control is realized.

The invention discloses a trestle-free rapid assembling and disassembling construction method for an offshore high-rise pile cap steel hanging box. The trestle-free rapid assembling and disassembling construction method comprises the following steps that S1, the steel hanging box is machined in a factory and pre-assembled; s2, transporting the steel hanging box to an assembling platform at a bridge site, and performing total assembling on the steel hanging box and the prefabricated bottom plate through connecting bolts; s3, hoisting the steel hoisting box to the pier position through a crane ship, and mounting the steel hoisting box at the pier position; s4, after the lower portion of the steel hanging box is in place, a blocking steel plate and a shear bracket are welded, and the shear bracket is located between the blocking steel plate and the steel pipe pile; s5, bottom sealing concrete is poured; s6, a bearing platform is poured; and S7, the hanging box is dismantled. A factory-like and modular process is adopted for the steel hanging box, after the river steel-concrete combined cofferdam is modularly machined in a factory, the steel-concrete combined cofferdam is generally spliced on an offshore splicing platform, then the steel-concrete combined cofferdam is hoisted in place at a time through a large crane ship, the construction efficiency is greatly improved, meanwhile, a temporary trestle is omitted, the overall hoisting technology of the crane ship is utilized, and the construction cost is reduced. The occupation on channels and the dependence on large equipment are reduced, and the construction cost is reduced.