414 results about "Immersed tube" patented technology

The invention discloses an immersed tunnel leakage voiceprint recognition system based on deep learning. The system comprises an acoustic signal acquisition module, a signal preprocessing module, a voiceprint feature extraction module, a deep learning recognition module and a leakage positioning and early warning module. According to the invention, the leakage water flow sound and the structural damage elastic wave signal of the immersed tunnel are comprehensively considered, the multi-dimensional voiceprint feature extraction and deep learning model are fused, and the adaptive signal noise reduction and sound source positioning technology is combined, so that the high-precision monitoring and real-time early warning of the leakage of the immersed tunnel are realized; the accuracy and real-time performance of immersed tunnel leakage nondestructive monitoring are improved, and powerful support is provided for follow-up risk prediction and early repair.

The invention relates to the technical field of rock-soil stress monitoring, in particular to a rock-soil stress monitoring data analysis method and system. The method comprises the following steps: acquiring geological data and construction design data of a river bridge construction area, and analyzing piling immersed tube distribution difference to obtain piling immersed tube distribution difference data; performing extrusion lateral stress deflection simulation according to the piling immersed tube distribution difference data, further estimating stress transfer loss to obtain effective stress transfer data, and performing stress impact structure instability analysis between adjacent rocks and soil; and constructing a rock-soil stress risk monitoring model based on a random forest algorithm, and sending the model to a terminal for rock-soil stress monitoring data analysis. The rock-soil stress monitoring technology is optimized, so that the rock-soil stress monitoring technology is more accurate.

The invention provides an immersed tube tunnel underwater slope protection silting prevention system and a construction method thereof.The immersed tube tunnel underwater slope protection silting prevention system comprises a foundation trench, a side slope is arranged in the foundation trench, the immersed tube tunnel underwater slope protection silting prevention system comprises a plurality of blocking units, each blocking unit comprises a silting prevention plate and a plurality of limiting pipes, and the limiting pipes are arranged on the side slope. The silt prevention plate is laid on the side slope, a plurality of accumulation channels penetrating in the vertical direction are formed in the silt prevention plate, and the accumulation channels are used for collecting silt; the multiple limiting pipes are inserted into the side slope in the vertical direction and connected with the silt prevention plate. According to the immersed tube tunnel underwater slope protection siltation prevention system, silt in water flow is intercepted through the accumulation channel on the siltation prevention plate, when the silt falls onto the siltation prevention plate, the silt can be deposited in the accumulation channel, the deposited silt and a soil body embedded in the accumulation channel are fused into a whole, the siltation prevention plate can be reversely fixed, the stability of a side slope is protected, and the service life of the side slope is prolonged. The sludge utilization rate is improved.

The invention discloses a prediction model-based anchor mooring force prediction method for an immersed tube workboat. According to the method, water area environment characteristics, ship body posture characteristics, anchor mooring parameter characteristics and construction state characteristics are used as key data characteristics for predicting the anchor mooring force of the immersed tube construction ship; according to the method, an anchor cable tension prediction model is constructed, historical data, reduced scale physical model test data, numerical simulation data and short-term test data are subjected to data fusion to form a data set, and the model is trained and verified; and finally, predicting the tension value of each anchor mooring line on line by using the trained anchor mooring line tension prediction model. According to the method, the stress condition of each anchor mooring line can be predicted in real time under multiple working conditions (such as sinking, leveling, steering and self-storage states), and powerful support is provided for accurate positioning and safety control of installation and construction of the immersed tunnel.

The invention discloses a large-scale immersed tube tunnel silt squeezing simulation device and method, the large-scale immersed tube tunnel silt squeezing simulation device comprises a large-scale immersed tube model, a truss structure, a gear rack structure, two supports and a model groove, the truss structure is fixed on the top of the large-scale immersed tube model, and a balancing weight is placed on the truss structure; two sealing rubber strips are respectively arranged on the periphery of the large-scale immersed tube model; in the process of lowering the large-scale immersed tube model in the model tank, one end of the large-scale immersed tube model rubs with the side wall of the model tank to form a closed end, the other end of the large-scale immersed tube model forms a sludge discharge end, and an ultrasonic flow meter is arranged at the sludge discharge end; a stay wire displacement sensor is fixed on each bracket, two fixed ends are arranged at the top of the large-scale immersed tube model, and a fixed head of each stay wire displacement sensor is fixed on one fixed end; a gravel layer, a back-silting float sludge layer and a seawater layer are sequentially arranged in the model groove from bottom to top, and a sea groove slope model is arranged in the model groove.

The invention discloses a comprehensive detection processing and analysis method and system for a deep foundation trench of an immersed tunnel, and relates to the technical field of data processing, and the method comprises the steps: firstly carrying out the acoustic calibration of a multi-beam array in a foundation trench region, and compensating a beam incident angle and echo delay, so as to eliminate systematic sounding errors; then macroscopically scanning the foundation trench based on the corrected sounding equipment to generate a high-resolution three-dimensional point cloud, identifying abnormal elevation change in real time and dynamically adjusting the dredging depth; then multi-frequency acoustic detection is carried out on the silt sediment, a float sludge thickness cloud picture is drawn to evaluate a loose structure, and targeted compensation is carried out; finally, the topographic form and the sediment structure change are jointly used for construction early warning, a closed-loop system from precision calibration to anomaly detection to physical property diagnosis and risk early warning is formed, the precision and integrity of foundation trench depth measurement and sludge monitoring are remarkably improved, potential risks can be found and corrected in time in construction, and the construction efficiency is improved. And the construction safety and efficiency of the immersed tunnel deep foundation trench are guaranteed.

The invention relates to a combined support and anchor cable combined underwater immersed tube tunnel and a construction method thereof, the combined support and anchor cable combined underwater immersed tube tunnel comprises a tunnel body which is formed by tube joints which are connected end to end in the length direction; the lower part of the pipe joint supporting mechanism extends into the seabed, the upper part of the pipe joint supporting mechanism extends out of the seabed, and the pipe joint is supported on the upper part of the pipe joint supporting mechanism; the device is characterized by further comprising a pipe joint anchoring mechanism used for controlling vibration and / or displacement of the tunnel body, and the pipe joint anchoring mechanism is arranged between the outer wall of the pipe joint and the seabed; the piles are distributed on the outward sides of the pipe joints forming the tunnel body at intervals, the lower ends of the piles penetrate into the seabed, the upper ends of the piles upwards stretch out of the seabed and are fixed to the pipe joints, and the resultant force of the tunnel body in the X direction, the Y direction and the Z direction is close to zero. The device has the advantages that vibration and / or displacement generated by the coupling effect of factors such as ocean waves, ocean currents, ship waves, storm surge and dynamic loads are effectively controlled so as to cope with the complex ocean environment; and the technical difficulty, the engineering cost and the comprehensive cost are reduced.

The invention relates to the field of immersed tube underwater construction, in particular to an underwater foundation bed leveling system which comprises a transversely-moving material distribution cart arranged on a chassis frame, and a longitudinally-moving material distribution trolley arranged on the material distribution cart. The material distributing rod is fixed on the material distributing trolley; the first absolute value encoder is arranged on the cloth cart and used for collecting first position data of the cloth cart; the second absolute value encoder is arranged on the distribution trolley and used for collecting second position data of the distribution trolley; the main control system comprises a receiving module and a control module, the receiving module is in communication connection with the first absolute value encoder and the second absolute value encoder, and the receiving module is used for receiving the first position data and the second position data and sending the data to the control module; and the control module is in communication connection with the receiving module, the material distribution cart and the material distribution trolley, and the control module controls movement of the material distribution cart and the material distribution trolley according to the first position data and the second position data, so that the material distribution rod automatically performs foundation bed stone laying underwater.

A large immersed tube full-section prefabricated lightweight formwork system comprises an inner formwork rack and an outer formwork rack, the inner formwork rack comprises an inner formwork fixing frame and an inner supporting rod assembly, the outer formwork rack comprises a top truss and two outer side trusses, an inner formwork comprises an inner formwork body and a lower chamfering part, and the inner supporting rod assembly comprises an inner supporting connecting rod and an inner telescopic oil cylinder. According to the embodiment of the invention, the inner template mounted on the inner template rack extends to the lower chamfer, and the three inner support connecting rods which are in the same straight line under the support of the two inner telescopic oil cylinders are used as the inclined support structure, so that the concrete which is firstly solidified at the lower chamfer can upwards support the horizontal part at the top of the inner template through the inclined support structure; and under the conditions of large span and large weight, the top plate reinforcing steel bars are stably supported, and the situation that the prefabrication precision of the immersed tube top plate is reduced due to downward deformation of the top plate reinforcing steel bars is avoided.

The invention belongs to the technical field of welding platforms, and particularly relates to an immersed tube overwater welding operation platform which comprises a floating box, a welding supporting mechanism and a plurality of pipeline locking mechanisms, and the inner wall of the floating box is divided into nine air floating chambers through partition plates. The pipeline can float on the water surface to complete welding butt joint, butt joint of pipelines of different lengths is adapted, and the quality efficiency is guaranteed by monitoring the inclination state of the floating box and the welding platform in real time and adjusting the balance weight to prevent tipping and create a stable welding environment; stable fixed tension is provided, wind power and water flow influences are resisted, position deviation is prevented, reverse compensation force can be provided in cooperation with a propeller when large driving force is applied in one direction, fatigue damage of a traction rope due to continuous impact force is avoided, rapid water supply and drainage of the buoyancy tank are achieved, water is rapidly injected to increase the overall weight when large impact force is applied, and the tensile force of the traction rope is improved in a matched mode; the water flow pushing efficiency is reduced, the resistance stability is improved, and the positioning effect is optimized.

The present invention relates to the technical field of immersed tube construction, and in particular to a variable-cross-section template and a construction method for a variable-cross-section immersed tube. The variable-cross-section template comprises an inner template system and an outer template system, wherein the inner template system is located inside the outer template system; two outer sides of the inner template system are provided with first inclined faces inclined inwardly toward each other, two inner sides of the outer template system are provided with second inclined faces inclined inwardly toward each other, and each second inclined face corresponds to the first inclined face on the same side; and casting is performed in an area between the inner template system and the outer template system to form an immersed tube. During the casting of the immersed tube, an inclined side wall is provided between each second inclined face and the first inclined face on the same side to form a flared section of the immersed tube, and then the immersed tube enables lane confluence by means of the flared section. The immersed tube is cast by means of the variable-cross-section template of the present application, so that the immersed tube has the flared section, and the variable-cross-section immersed tube is formed, thereby meeting the construction requirements.

The invention provides an immersed tube joint air cushion suspension device and a control method thereof, and belongs to the field of immersed tube transportation. The immersed tube section air cushion suspension device is divided into the air cushion suspension unit, the partition control unit, the communication unit and the central control unit, and intelligent air cushion suspension transportation of immersed tube sections is achieved; through the method, the suspension height and speed of each subarea and the transportation angle of the whole immersed tube joint can be intelligently controlled, and in the transportation process of the immersed tube joint, the method has the advantages that friction force and ground vibration are reduced, carrying is efficient, control is accurate, the method adapts to various terrains, damage to the ground is reduced, and the method is environmentally friendly and safe.

A method for dismounting and transferring a large immersed tube full-section prefabricated formwork in a limited space comprises the steps that an outer formwork trolley is averagely split into two outer trolley parts, the first outer trolley part is horizontally moved to the front side of a second immersed tube prefabricated area, the first outer trolley part is horizontally rotated to the longitudinal direction, and the second outer trolley part is horizontally moved to the front side of the second immersed tube prefabricated area; and horizontally rotating the second outer trolley part to an inclined state, longitudinally and backwards translating the second outer trolley part to the rear side of the first outer trolley part, horizontally rotating the first outer trolley part and the second outer trolley part to the transverse direction, and assembling the first outer trolley part and the second outer trolley part into the outer mold trolley. According to the embodiment of the invention, the prefabricated template is divided into a plurality of trolley modules, so that the trolley modules can translate towards the second immersed tube prefabricating area along the transverse construction channel, the trolley modules are transferred to the second immersed tube prefabricating area one by one in a transverse translation and rotation mode, and the sequence of the trolley modules is kept consistent in the two immersed tube prefabricating areas; the trolley modules can be combined into the prefabricated formwork again, the number of transferring steps is small, and the construction speed is high.

The invention relates to grid laying equipment for immersed tunnel backfilling and an immersed tunnel backfilling method, belongs to the technical field of subsea tunnel construction, and aims to solve the problem that grids are difficult to lay accurately in existing immersed tunnel backfilling construction. The grating laying equipment for immersed tunnel backfilling comprises a first track, a second track, a charging mechanism, a configuration mechanism, a traction mechanism and a fixing device. The two first rails are arranged on the two sides of the immersed tunnel in parallel. The loading mechanism is movably arranged on the first track and is used for loading a grating roll; the configuration mechanism is communicated with the loading mechanism, is used for receiving the grating roll and can adjust the stretching end of the grating roll to the discharge port; the second rail is arranged perpendicular to the first rail and can slide along the first rail; the stretching end of the grid roll is pulled by the pulling mechanism, so that the gravel layer is fully paved with the grid; and the laid grating layer is fixed on the rubble layer by using a fixing device. According to the application, the accurate laying of the grating in the backfill construction of the underwater immersed tube tunnel is realized.

The invention discloses a CFD (computational fluid dynamics)-based immersed tube joint leakage hydraulic characteristic analysis and foundation soil starting judgment method. Comprising the steps of establishing a seepage physical model and calculating a resistance coefficient of a gravel foundation bed; establishing a three-dimensional geometric model of the immersed tube joint and the gravel foundation bed, and carrying out mesh refinement; calculating flow field distribution, flow velocity and shear stress characteristics by using a CFD numerical simulation method; carrying out amplification calculation of local flow velocity and shear stress on a calculation result; and comparing the amplified shear stress with the sediment critical starting shear stress, and judging the starting condition of the foundation soil. The influence of different anti-seepage measures on a leakage flow field is quantitatively analyzed by simulating the local flow velocity and shear stress distribution of the bottom of the gravel foundation bed, the measure design is optimized, and the reliability of foundation soil stability evaluation is improved.

The invention relates to a highway-railway combined construction immersed tube tunnel foundation bed structure, which belongs to the field of immersed tube tunnels, and adopts the technical scheme that a staged foundation is arranged below an immersed tube tunnel, the rigidity of a cushion layer of the staged foundation is gradually reduced along with the length from the end of the immersed tube tunnel, and a grouting lifting device is arranged below the staged foundation; the immersed tunnel is provided with a monitoring device, the monitoring device transmits monitored signals back to the data center, and a backfilling layer is arranged above the immersed tunnel according to an original riverbed line. According to the method, the multi-stage rigidity gradient distribution design and the active control lifting device are adopted, intelligent regulation and control of foundation bed supporting rigidity distribution characteristics are utilized, foundation lifting compensation is implemented in real time, dynamic optimization of a load transmission path and precise regulation and control of the settlement amount are achieved, and the service life of a key structure is greatly prolonged.

The invention relates to a concrete crack control method during manufacturing of an immersed tube joint, which is characterized in that a pre-cast section and a post-cast strip of the immersed tube joint are cast in a full-section casting manner, so that the construction efficiency can be improved, and meanwhile, cracks caused by vertical layering are reduced; the crack control requirement is obtained by obtaining the stress influence of the waterproof bottom steel plate on the two poured adjacent pre-pouring sections, then control indexes of control parameters are determined according to the crack control requirement, full-section pouring process construction organization arrangement is conducted, then immersed tube joints are manufactured, and the construction quality of the immersed tube joints is improved. According to the mode, the restraining effect of the post-cast strip waterproof bottom steel plate on the two adjacent pre-cast sections can be considered, the better crack control effect can be achieved, the full-section interval pouring immersed tube section concrete crack control method is provided, the whole-section pouring technology of the supporting integral type immersed tube section is provided, high-quality prefabrication of the immersed tube section is guaranteed, and the construction efficiency is improved. And meanwhile, the immersed tube joint prefabricating efficiency is greatly improved.

The utility model relates to a sampler for back-silting detection of a foundation trench of a pre-laid immersed tube tunnel, which belongs to the technical field of back-silting detection of foundation trenches of immersed tube tunnels and comprises a sampling tube, a sealing diaphragm and a sealing lifting lead. Wherein the sampling tube is used for accommodating a foundation trench back-silting sample, an opening is formed in the bottom of the sampling tube, and a bracket is fixed at the top; the sealing diaphragm is arranged at the bottom of the sampling tube and used for sealing the opening after sampling; one end of the sealing lifting wire is connected with the sealing diaphragm through the bottom of the sampling tube, the other end of the sealing lifting wire is controlled by a worker, and when the sealing lifting wire is controlled to be pulled upwards, the sealing lifting wire pulls the sealing diaphragm to move and seal the opening. According to the sampler, the opening is formed in the bottom of the sampling tube and is sealed by the sealing diaphragm, so that accurate acquisition of a back-silting sample is ensured; and through the arrangement of the sealing lifting lead wire, an operator can easily control opening and closing of the sealing diaphragm, and the operation difficulty and cost are reduced.

The utility model belongs to the technical field of immersed tubes, and discloses an immersed tube device, two ends of an immersed tube are provided with water inlet valves, the immersed tube device comprises a hoisting mechanism and a built-in buoy, the hoisting mechanism comprises a plurality of hangers and cranes, the hangers are arranged on the immersed tube, the hangers and the cranes are arranged in a one-to-one correspondence mode, the cranes are located on two banks and / or the water surface, and the built-in buoy is arranged in the immersed tube. The built-in float bowls are arranged in the immersed tube, each built-in float bowl comprises a plurality of float bowls and connecting pieces, the connecting pieces are detachably connected between every two adjacent float bowls, each float bowl is in a hollow cylindrical shape, and each float bowl is provided with a water inlet valve and an exhaust valve. According to the immersed tube device, a plurality of hangers are welded on the surface of an immersed tube, and cranes in one-to-one correspondence with the hangers are arranged on the two banks and the water surface to provide hanging force for the immersed tube; the built-in buoy is placed in the immersed tube, the immersed tube is sunk into the foundation trench by means of buoyancy of the built-in buoy and a crane with small lifting force, the number of sinking procedures is small, the construction period is shortened, and the influence on shipping economy is small.

The invention provides a pre-paving method immersed tube tunnel and a construction method of a pre-paving method integral type tube joint immersed tube tunnel, and belongs to the field of tunnels, the pre-paving method immersed tube tunnel comprises a tunnel body, a broken stone hardcore and an adjusting assembly, and the broken stone hardcore is arranged below the tunnel body; the adjusting assembly comprises a first adjusting layer, a second adjusting layer and a grouting mechanism, the first adjusting layer and the second adjusting layer are both arranged between the tunnel body and the broken stone hardcore, the first adjusting layer and the second adjusting layer are sequentially arranged from bottom to top, the first adjusting layer comprises a plurality of first bags evenly laid on the broken stone hardcore, and the second adjusting layer comprises a plurality of second bags evenly laid on the broken stone hardcore; the second adjusting layer comprises a plurality of second bags evenly laid above the first bags, all the second bags are located between the first bags and the tunnel body, and the grouting mechanism comprises first grouting pipes communicating with the first bags and second grouting pipes communicating with the second bags. Compared with the prior art, by arranging the double-layer bag, the technical problem that an existing integral immersed tube tunnel is prone to being damaged due to sedimentation is solved.

The invention relates to a prestressed immersed tube joint, a design method and an SPMT on-vehicle barge method. According to the prestressed immersed tube joint, the transverse first prestressed steel beams are arranged in the bottom plate of the prestressed immersed tube joint, so that all the parts of the bottom plate can meet the supporting conditions of SPMT vehicles, then the SPMT vehicles can be fully distributed below the bottom plate, and enough supporting force can be provided when the SPMT vehicles are used for transporting the prestressed immersed tube joint; the cracking degree of the prestressed immersed tube joints can be reduced, so that the immersed tube joints can be transported by adopting an SPMT vehicle; the transverse second prestressed steel beam is arranged in the top plate, the second prestressed steel beam can overcome the stress influence of the first prestressed steel beam on the top plate, the arrangement form of the first prestressed steel beam and the second prestressed steel beam conforms to the load bearing form of the bottom plate and the top plate of the immersed tube joint in the operation period, and the stress state of the immersed tube joint in the operation period is met; the reinforcement quantity of the bottom plate and the top plate can be reduced, and the cost is saved.

The invention relates to a high-power vibroflotation lower assistance immersed tube bottom discharging device and a construction technology, and belongs to the field of vibroflotation construction. The device comprises a vibroflot, an immersed tube used for conveying filler and a lower power assisting system used for applying downward pressure to the immersed tube and the vibroflot, a feeding port is formed in the upper portion of the immersed tube, and a discharging port is formed in the lower end of the immersed tube. The lower power assisting mode of the lower power assisting system comprises but not limited to a vibration hammer, an impact hammer, a down-the-hole hammer and a winch lower pressurization system. The discharging mode is bottom discharging, including but not limited to damper upper portion discharging and vibroflot head discharging. The material guide pipeline of the immersed tube can be an external water, gas and gas pipeline channel or a water, gas and stone pipeline channel in the material guide pipeline, and is suitable for diversified construction. A high-power vibroflot is adopted to be matched with an immersed tube for construction, and the device is particularly suitable for treating muddy clay geology.

The invention provides an immersed tube joint sinking butt joint underwater space positioning system and method. The immersed tube joint sinking butt joint underwater space positioning system comprises a clinometer, a mobile station group, a tide gauge, a multi-beam sonar and a monitoring data analysis and display module. The inclinometer obtains bidirectional dip angle monitoring data of the immersed tube joint; the mobile station group obtains coordinate monitoring data of positions where the mobile stations are located respectively; the tide level meter obtains tide level monitoring data in the pipe joint sinking and butt joint period; the multi-beam sonar obtains the terrain data of the underwater foundation trench in the pipe joint sinking and docking area; the monitoring data analysis and display module obtains feature point coordinates, pipe joint postures and early warning index data on a to-be-immersed pipe joint according to the inclinometer monitoring data, the mobile station group monitoring data, the tide level data, the multi-beam underwater topographic data and the immersed pipe joint coordinate data.

The utility model discloses a high-precision immersed tube butt joint detection device capable of being operated by an underwater robot. The high-precision immersed tube butt joint detection device comprises an anti-corrosion material, an acoustic transmission material, a probe, a return spring, a laser range finder, a cylindrical roller, a connecting bracket, a sonar, a sonar control system, a sonar protection cover, a storage battery, a fixing clamp and a wiring port, a plurality of miniature probes are distributed on the outer ring of the cylindrical roller, when the roller passes through an object to be detected, the probes are moved and contracted towards the inside of the roller under the action of external force, the contour lines of the probes are flatly spread and unfolded to restore the contour of a detection area, and the contracted distance is accurately detected through a laser range finder; the sonar is arranged on the upper portion of the cylindrical roller and protected by the sound transmission protection cover, the orientation of the sonar is adjusted according to needs through the control system, the immersed tube butt joint posture can be judged and the detection path can be optimized through the cooperation of the sonar and the robot, real-time detection data are fed back to the sonar control system, and the scanning posture of the sonar is adjusted and controlled. And finally, high-precision real-time three-dimensional image reconstruction of the underwater sinking pipe attitude is realized.

The utility model provides an immersed tube foundation bed desilting platform convenient for rapid construction, which comprises a self-floating platform, a longitudinal moving trolley and a transverse moving trolley, a first moon pool is arranged in the middle of the self-floating platform, the longitudinal moving trolley is arranged in the first moon pool in a sliding manner, the transverse moving trolley is connected with the lower part of the longitudinal moving trolley in a sliding manner, and the moving directions of the transverse moving trolley and the longitudinal moving trolley are vertical. The dredging pipe is arranged in the transverse moving trolley in a penetrating mode and connected with the top of the longitudinal moving trolley through a connecting rope, the adjusting devices are arranged on the two sides of the longitudinal moving trolley in parallel respectively and connected with the adapters through the connecting ropes, the adapters are connected with the self-floating platform through first pull ropes, and the adjusting devices are used for adjusting the fixing positions and tensioning force of the connecting ropes. The dredging platform is compact in structure and simple in design, and stability and smoothness of the dredging platform in the moving process can be greatly improved.

The invention relates to the technical field of immersed tunnels, in particular to an immersed tunnel settlement calculation method, system and medium under a sedimentation load.The method comprises the steps that basic assumption is made based on stress deformation characteristics of an immersed tunnel, and the circulation form of the sedimentation load is determined based on the basic assumption; obtaining a calculation expression of the siltation load changing along with time; calculating the non-linear consolidation settlement of the soil layer of the underlying foundation caused by the sedimentation load; through the compression modulus, the drainage distance, the consolidation coefficient and the cycle period of the foundation soil layer, a Taylor expansion is combined to obtain a calculation expression of foundation settlement changing along with time; based on the bending moment and the shearing force of the Timoshenko beam model, the deflection of the immersed tube tunnel with the different dredging frequencies is determined; determining a settlement value at the left end joint of any pipe joint and a settlement value at the right end joint of any pipe joint according to the transmission deflection difference and the rotation angle between the adjacent pipe joints in the immersed tunnel; according to the method, the calculation accuracy of immersed tunnel sedimentation caused by the sedimentation effect can be improved.

The present application belongs to the technical field of immersed tube tunnel construction. Disclosed are an integrated barge for gravel bed leveling and immersed tube sinking and mounting, and an immersed tube tunnel construction method. The integrated barge comprises a hull, a leveling device and an immersed-tube hoisting and lowering device, wherein the hull comprises two floating bodies and two cross beams; a space located below the cross beams and between the two floating bodies is configured to contain immersed tubes; a hollowed-out area enclosed by the two floating bodies and the two cross beams forms a moon pool; the leveling device comprises a traveling mechanism, a traveling trolley and a leveling actuation mechanism; the traveling trolley is flipped in a vertical plane relative to the traveling mechanism, such that the leveling actuation mechanism is switched between an operating state and a non-operating state; and the immersed-tube hoisting and lowering device is configured to be connected to the immersed tubes, which are located in the space below the cross beams, and to control the immersed tubes to be sunk and mounted. The integrated barge integrates the functions of gravel bed leveling and immersed tube sinking and mounting, and can thus effectively reduce the ship configuration on an immersed tube tunnel construction site, thereby improving the construction efficiency and reducing the construction cost.

The utility model discloses a cast-in-place pile over-pouring leveling device, which relates to the technical field of cast-in-place pile over-pouring construction, and comprises an immersed tube arranged in a pile hole and a connecting tube arranged at the top of the immersed tube, and a leveling mechanism and an over-pouring height detection mechanism are sequentially arranged on the connecting tube. The leveling mechanism comprises a supporting frame fixedly connected to the outer wall of the top of the connecting pipe, a rotating cylinder connected with the inner wall of the center of the supporting frame in a penetrating mode through a bearing, a lifting rod connected into the rotating cylinder in a sliding mode, a scraping plate fixedly connected to the bottom end of the lifting rod, a driving assembly and a height adjusting assembly. The leveling mechanism is arranged, the working height of the leveling plate is adjusted to a proper height through the height adjusting assembly, and then the leveling plate is driven to rotate at a high speed through the driving assembly, so that the flatness of a pile top area can be ensured by leveling concrete after the over-pouring construction is completed; and stress concentration caused by uneven concrete surface is avoided, so that the integral structural integrity and the bearing capacity of the cast-in-place pile are ensured.

The invention discloses an immersed tube butt joint installation method and system based on laser ranging and visual recognition, and belongs to the technical field of ocean engineering. The method comprises the steps that a laser target set is installed on the butt joint end face of an installed pipe joint, and a laser positioning set and a laser projector are installed on the butt joint end face of a to-be-installed pipe joint; after the to-be-installed pipe joint sinks, the laser positioning group is started to measure the distance to the target group in real time, meanwhile, parallel light beams are emitted to the other end face of the to-be-installed pipe joint through the laser projector, and the position of a light spot is collected through visual recognition to obtain posture deviation; the distance and deviation data are fused, the optimal pose of the pipe joint to be installed is calculated through an optimization algorithm, and then the offset of the end face center and the axis deflection angle are obtained; and according to the parameters, a regulation and control instruction is generated, and the ballast water system and the winch system are controlled to adjust the posture of the to-be-installed pipe joint till accurate butt joint is achieved. According to the invention, full-underwater, high-precision and automatic immersed tube butt joint is realized, and the dependence on an overwater measuring tower and a GPS (Global Positioning System) is eliminated.

The invention relates to the technical field of dock and immersed tube dry dock building, in particular to a dock gate structure, a dock gate system and a dock gate mounting method.The dock gate structure comprises a dock gate which is of a grillage structure; the supporting frame is used for supporting one side of the dock gate through a plurality of jacks, and the supporting frame can be detachably separated from the dock gate. According to the dock gate structure, the support frame which is detachably connected is arranged on one side of the dock gate to provide external support for the dock gate and share partial stress, so that the dock gate can be designed into a lighter grillage structure, and the volume of the dock gate is greatly reduced. After being prefabricated, the dock gate can be in a flat state on the water surface to be hauled, and due to the fact that the size and draught are greatly reduced, the requirement for the channel depth is reduced. After being hauled to the site, the device is assembled with the supporting frame for use, so that the overwater operation processes such as floating transportation and installation are simpler, more convenient and more efficient, and the engineering construction efficiency is greatly improved.