185 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 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 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 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 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 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 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 utility model relates to the technical field of foundation pile impact devices, in particular to a static pressure immersed tube method plain soil compaction pile impact device which comprises two cross beams which are symmetrical to each other and fixedly installed on an external pile press, and U-shaped frames are fixedly installed on rod bodies at the ends of the two cross beams. A supporting frame is rotationally connected between the left side plate body and the right side plate body of the U-shaped frame through a rotating shaft, a driving motor is coaxially arranged at the end of the rotating shaft, a first hydraulic cylinder is fixedly installed on the top plate body of the supporting frame, a lower pressing disc is arranged at the tail end of a telescopic shaft of the first hydraulic cylinder, and second hydraulic cylinders are fixedly installed on the left side plate body and the right side plate body of the supporting frame. A clamping plate is arranged at the tail end of a telescopic shaft of the second hydraulic cylinder, guide holes are formed in the left side plate body and the right side plate body of the supporting frame, guide rods are fixedly installed on the side faces of the clamping plate, and the guide rods penetrate through the guide holes and are in sliding connection with the guide holes. According to the utility model, angle adjustment and clamping guide operation are facilitated, and dense pile impact is facilitated.

The invention discloses a seabed immersed tube tunnel reinforcing device, a construction method and a resetting method, and belongs to the technical field of tunnels. A seabed immersed tube tunnel reinforcing device comprises a tunnel body installed on a seabed foundation, a plurality of composite pile pieces are arranged in the seabed foundation, a broken stone hardcore connected with the composite pile pieces is installed on the surface of the seabed foundation, and a bag base layer is arranged on the upper surface of the broken stone hardcore. A bag adjusting layer connected with the tunnel body is mounted on the upper surface of the bag base layer; in an operation period and a post-earthquake observation period, attitude data of the tunnel body can be obtained in real time by utilizing a dynamic monitoring and adjusting mechanism constructed by the bag adjusting layer, the grouting device and the detection system, and once it is monitored that the attitude of the tunnel body deviates, the grouting device can be allocated in time, and according to data fed back by the detection system, the attitude of the tunnel body can be accurately detected. And grouting operation is rapidly conducted on the bag adjusting layer, and posture adjustment can be conducted on the specific portion of the tunnel body in a targeted mode by controlling the grouting pressure and the grouting amount.

The invention relates to the technical field of water quality monitoring devices, and discloses a floating type water quality monitor which comprises a buoy, a retractable box fixed to the top of the buoy, a waterproof center control box installed above the retractable box and a monitoring piece arranged below the buoy, solar panels are annularly distributed on the periphery of the waterproof center control box, and a fixed lug ring is arranged on the top of the buoy in the circumferential direction; a supporting cylinder penetrating through the buoy is coaxially and fixedly connected to the bottom of the winding and unwinding box, a linkage cable set is arranged in the supporting cylinder and comprises a connecting cable and a driving steel cable which are arranged in parallel, and the bottom ends of the two cables are jointly connected with a monitoring part and control the monitoring part to ascend and descend; according to the scheme, through control of the linkage cable set composed of the connecting cable and the driving steel cable which are arranged in parallel, the monitoring depth of the monitoring piece can be adjusted through synchronous retracting and releasing, the driving steel cable can be independently lifted to enable the immersed tube to incline to form a monitoring deviation angle, the monitoring piece can move in the circumferential fan-shaped range in the axis direction of the buoy, and the monitoring range is widened.

This application discloses a method, system, and electronic equipment for guiding vessels through an immersed tunnel area in a port area, relating to the field of vessel management in port waters. The method includes: triggering vessel identification based on an electronic fence; determining the target vessel to enter the electronic fence area; determining the vessel's navigation path based on scheduling plan information; estimating the time interval for the target vessel to pass through the immersed tunnel area; acquiring tidal level data of the immersed tunnel area; and calculating the passage window period for passing through the immersed tunnel area based on the tidal level data; comparing the time interval for passing through the immersed tunnel area with the passage window period; and determining the time period for the vessel to pass through the immersed tunnel area based on the comparison results; and generating passage guidance information for the vessel during its passage through the immersed tunnel area based on real-time tidal height data during the passage period. This application solves the technical problem in related technologies where only vague prompts are provided for vessels with passage risks in immersed tunnel areas, resulting in low vessel passage efficiency.

The invention relates to a foundation bed provided with an immersed tunnel inclined self-silt-discharging furrow, which comprises a foundation trench, a block stone layer and a rubble layer, the rubble layer is provided with a furrow (3) and a ridge platform (4), the furrow (3) comprises two side slopes, the surfaces of the two side slopes are called side slopes (6), and the foundation bed is characterized in that the position, close to the middle and lower than the ridge platform (4), on the furrow (3) is a furrow starting point, and the ridge platform (4) is arranged on the furrow (3). Two furrow end points are arranged at the two ends of the furrow (3) respectively, a middle slope from high to low extends from the furrow starting point to each furrow end point, and a front inclined plane (5) is formed on the surface of each middle slope; the shapes of the side slopes (6) of the two side slope surfaces are determined according to the middle slope; and in the silt squeezing process of the immersed tube, silt returning objects at the bottom of the immersed tube flow out of the bottom of the immersed tube along the two front inclined planes (5). The invention further provides a design method of the foundation bed.

The utility model discloses a piling immersed tube for building foundation construction and relates to the technical field of immersed tubes, the piling immersed tube further comprises an immersed tube body, a through groove is formed in the bottom of the outer side of the immersed tube body in a penetrating mode, a protruding part used for guiding materials is fixedly connected to the bottom of the inner side of the immersed tube body, a pile head is installed at the bottom of the immersed tube body, and a pile tip is installed at the bottom of the pile head; the inner side of the immersed tube body is provided with a discharging mechanism used for delaying the descending speed of the gravel blocks, the discharging mechanism comprises a fixing tube, the fixing tube is located on the inner side of the immersed tube body, one side of the inner wall of the fixing tube is fixedly connected with a plurality of first sliding plates, and the other side of the inner wall of the fixing tube is fixedly connected with a second sliding plate. And broken stones can gradually slide to the protruding part along the first sliding plate and the second sliding plate, so that the broken stones are conveniently prevented from directly falling from the high altitude to smash the protruding part, and then the service life of the protruding part is conveniently prolonged.

The utility model relates to a final joint of an immersed tube, which belongs to the field of tunnel construction and comprises a tube section, an expansion section, a push-out section, a push component, a waterstop and a retainer ring structure. A channel is formed in the pipe section in the length direction of the pipe section. The expansion section is arranged at one end of the pipe section in the length direction. The push-out section is arranged in the expansion section. The pushing assembly is used for pushing the push-out section to move in the length direction of the pipe section. The push-out section is sleeved with the water stop belt. The two ends of the water stop belt are connected to the peripheral wall of the push-out section and the end wall of the expansion section correspondingly. The check ring structure is arranged on the end wall, facing the water stop belt, of the push-out section. The check ring structure is located between the water stop belt and the push-out section. The check ring structure comprises a blocking piece, a first spring piece and a connecting assembly. The push-out section is sleeved with the blocking piece, and the blocking piece inclines towards the direction of the push-out section to the direction away from the pipe section section. The first spring piece is attached to the side, facing the expansion section, of the blocking piece. The connecting assembly fixes the blocking piece and the first spring piece to the expansion section.

The invention provides a measurement and control method and system for underwater immersed tube butt joint. The method comprises the following steps that optical, mechanical and inertial multi-source sensor data and the like in the immersed tube butt joint process are synchronously collected; and when the optical beacon is shielded, the position of the optical beacon is repaired through inverse dynamic estimation. Performing time-frequency analysis on the multi-source data, and separating the multi-source data into a motion main signal and a noise signal; the motion main signal is input into a motion state filter, and the noise signal is input into a noise state model filter to identify comprehensive noise features in real time. The core step is to generate a feed-forward compensation item based on the noise characteristics, and the feed-forward compensation item is used for correcting the updating process of the motion state filter so as to eliminate the noise influence in advance and output the optimal pose estimation. And finally, generating a smooth control instruction based on the optimal pose. The method has the effect of improving the butt joint precision of the immersed tubes in the underwater complex environment.

The utility model belongs to the technical field of immersed tunnels, and discloses a temporary limiting device for final butt joint of immersed tunnels, which comprises a first limiting frame and a second limiting frame, the top end of the first limiting frame is provided with a pair of limiting straight grooves, and the top end of the first limiting frame is provided with a pair of inclined guide plates on two sides of each limiting straight groove. A mounting groove is formed in the top end of the interior of the second limiting frame, a pair of first hydraulic rods is mounted in the mounting groove, and the output ends of the pair of first hydraulic rods penetrate through one side of the second limiting frame and extend to the outer side of the second limiting frame. According to the device, a first limiting frame and a second limiting frame can be rapidly placed at the joint of the two immersed tunnels, the first limiting frame and the second limiting frame are fixed to immersed tunnel pipe joints through extension of a second hydraulic rod, rapid alignment of the two immersed tunnels is achieved through clamping of a limiting straight groove and a trapezoidal block, and the two immersed tunnels can be rapidly aligned. And therefore, the flexibility of the temporary limiting device is improved, and the working efficiency during final butt joint is improved.

The present invention relates to the technical field of immersed tube installation, and in particular to an installation process for an immersed tube with a large curvature in a curved section; the process comprises a floating process for the immersed tube and a sinking process for the immersed tube; the floating process for the immersed tube is carried out by seven fully-rotating tugboats, and during the floating process for the immersed tube, the first fully-rotating lifting and towing tugboat and the second fully-rotating lifting and towing tugboat provide power for the advancement and braking of the immersed tube, and the first fully-rotating tugboat, the second fully-rotating tugboat, the third fully-rotating tugboat and the fourth fully-rotating tugboat adjust the position of the axis of the immersed tube through a motor vehicle so that the immersed tube does not deviate from the floating channel; when the immersed tube is floated into place, it is sunk so that the immersed tube is implanted; the installation process for the immersed tube with a large curvature in a curved section of the present invention reduces the number of tugboats required for floating and reduces the cost; the sinking position of the immersed tube is close to the tail end of the installed immersed tube, the distance of pulling together after implantation is small, the offset of the axis of the tail end of the immersed tube is small, and it is conducive to controlling the deviation of the axis of the tail end of the immersed tube.

The present application belongs to the field of geotechnical engineering and underground structure engineering, and provides a consolidation settlement calculation method suitable for composite foundation of immersed tunnel. The present application divides the foundation system into three sub-domains of gravel cushion, pile-soil reinforcement area and underlying soft soil area. The external load first acts on the top surface of the cushion, and then is transmitted to the composite foundation in layers from the cushion. The cushion is explicitly introduced into the settlement calculation system as an independent compressible unit, and is strictly connected in series with the consolidation calculation of the underlying "reinforcement area + underlying layer". Compared with the traditional calculation method which only regards the cushion as a "rigid uniform load plate" or directly ignores its deformation, the present method can quantify the settlement contribution of the cushion itself, reveal the coordination relationship among the cushion, the composite foundation and the underlying layer in deformation, and thus make up for the important gap in the existing consolidation settlement theory of composite foundation that "only soft soil is calculated without considering the cushion".

The application discloses a kind of immersed tube tunnel structure health assessment model weight dynamic optimization method, obtains the measured data of immersed tube tunnel monitoring parameter, compares and calculates each corresponding threshold with measured data, and the measured health score of each monitoring parameter is obtained, and the comprehensive measured health score A is obtained;Based on deep learning model, historical monitoring data modeling is carried out, and the prediction data of each monitoring parameter in future period is predicted, and the prediction data is compared and calculated with each corresponding threshold, and the prediction health score of each monitoring parameter is obtained, and the comprehensive prediction health score B is obtained;Establish immersed tube tunnel structure health assessment model C, C= x A+ y B, weight x And y Bayesian dynamic update is carried out.The application can effectively improve the precision and adaptability of health assessment model by collecting future sensor data to calculate corresponding measured score, and realizing fusion score weight dynamic update combined with Bayesian estimation.

The utility model belongs to the technical field of immersed tunnel butt joint, and discloses a top sealing assembly and a joint tool for a final joint of an immersed tunnel. The top sealing assembly comprises a top sealing frame, a top shell and a manhole pipe, and the top sealing frame is used for being arranged at the top of a gap between every two adjacent immersed tubes and used for assisting in forming a top sealing plate of a final joint of the immersed tunnel. The top shell covers the top sealing frame and is detachably connected with the top sealing frame, and a moving space capable of containing constructors is formed between the top shell and the top sealing frame. One end of the manhole pipe is connected with the top shell, the other end of the manhole pipe can extend to the water surface, and a channel in the manhole pipe is communicated with the activity space. By adopting the top sealing assembly for the final joint of the immersed tunnel, a constructor enters the moving space from the manhole pipe for water stop inspection, and the safety risk can be reduced; and meanwhile, constructors can pour the top sealing frame in the movable space above the top sealing frame to form the top sealing plate, so that the construction difficulty and the construction cost are reduced.

The application discloses a kind of based on deep learning's immersed tube tunnel leakage acoustic print recognition system, the system includes acoustic signal acquisition module, signal pre-processing module, acoustic print feature extraction module, deep learning identification module and leakage positioning and early warning module;The present application considers the sound of leakage water flow and structure damage elastic wave signal of immersed tube tunnel by comprehensively, fuses multidimensional acoustic print feature extraction and deep learning model, combines adaptive signal noise reduction and acoustic source positioning technology, realizes high-precision monitoring and real-time early warning to immersed tube tunnel leakage, not only improves the accuracy and real-time of immersed tube tunnel leakage nondestructive testing, also provides strong support for subsequent risk prediction and advance repair.

The application is a method for installing, measuring, controlling and checking large-curvature pipe sections, which comprises checking the posture of the immersed tube during the installation of the immersed tube pipe sections and checking the through measurement accuracy after the installation of the immersed tube pipe sections; the checking the posture of the immersed tube during the installation of the immersed tube pipe sections specifically comprises: GPS-RTK accuracy comparison, total station synchronous monitoring, pulling and closing systems, and diving and pulling measurement; the checking the through measurement accuracy after the installation of the immersed tube pipe sections specifically comprises: combined cavity tooth measurement and point projection measurement. The application can be applied to the installation, measurement, control and checking of large-curvature pipe sections, the accuracy of the measurement and control system is verified through diving, pulling and closing and RTK, the initial posture measurement of the pipe sections is verified through combined cavity measurement and manhole point projection measurement, the accuracy of the measurement and control system and the through measurement is verified from multiple angles, the risk of pipe section docking is reduced, and data basis is provided for subsequent pipe section linear control.

The present invention discloses a combined immersed tube segment for an immersed tube tunnel and a construction method. The combined immersed tube segment for an immersed tube tunnel comprises: a segment body, the segment body being a reinforced concrete structure, the segment body comprising a top plate, a bottom plate, side walls, and a middle wall, the top plate, the bottom plate, the side walls, and the middle wall enclosing a tunnel for vehicles; an inner lining steel plate, the inner lining steel plate being disposed on the inner side wall of the tunnel; a tubular cavity, the tubular cavity being disposed on the outer side wall of the inner lining steel plate and embedded within the segment body, the top plate being provided with a grouting hole and a first exhaust hole communicating with the interior of the tubular cavity; and a water tank, the water tank being detachably disposed within the tunnel. The above structure can reduce the draft of the immersed tube segment during floating transportation and eliminates the need for large trusses when casting the segment body, thereby reducing the construction cost and construction difficulty of the immersed tube tunnel.

The present application relates to a kind of immersed tube transport sinking barge and immersed tube transport sinking construction method, belong to immersed tube tunnel construction technical field.The immersed tube transport sinking barge includes single hull, pair of cantilever beam, and immersed tube lifting and placing device;Pair of cantilever beam is symmetrically arranged in the width direction of single hull, and cantilever beam is cantilevered out from single hull to the outside of the width direction of single hull;Cantilever beam is at least two pairs and symmetrically arranged relative to the center plane of single hull length direction;Immersed tube lifting and placing device includes the sinking equipment corresponding to cantilever beam one by one, and sinking equipment is installed on cantilever beam, and each sinking equipment is connected to the immersed tube below single hull, to transport immersed tube and control the sinking installation of immersed tube;Wherein, the sinking equipment corresponding to pair of cantilever beam is respectively connected to the both sides of the width direction of immersed tube.The width of the immersed tube transported by the immersed tube transport sinking barge can be close to the upper limit of the width of inland waterway, and the width of inland waterway can be fully utilized.

The invention relates to the field of immersed tube calibration and measurement, in particular to an immersed tube tunnel measurement and calibration method and system.The method comprises the steps that tube joint top face control points and tube joint top face feature points are arranged and calibrated, and the relative position relation between the tube joint top face feature points and the tube joint top face control points is obtained; measuring tower feature points are arranged and calibrated, and the relative position relation between the pipe joint top face feature points and the measuring tower feature points is obtained; calculating a rotation matrix and a translation vector based on the relative position relationship between the pipe joint top surface feature point and the pipe joint top surface control point and the relative position relationship between the pipe joint top surface feature point and the measurement tower feature point, and establishing a rigid body conversion model; on the basis of the rigid body conversion model and the coordinates of the characteristic points of the measuring tower, the pose of the pipe joint is calculated in real time in the sinking process of the pipe joint, and the elevation of the pipe joint is dynamically calibrated through a real-time correction model. According to the method, high-precision and continuous calibration and control of the whole immersed tube installation process are achieved, and the final butt joint quality under the complex environment is effectively guaranteed.

The application relates to an indoor model test system and a test method for a pipe tunnel construction process, the system comprising a to-be-sunk pipe section model, a sunk pipe section model, a GNSS antenna head, GNSS fixing equipment, an inertial navigator and a crane; the method comprising the following steps: constructing a three-dimensional model of the to-be-sunk pipe section model; performing test test before the test; in the test process, the to-be-sunk pipe section model is lifted by the crane, the posture of the pipe section model and the construction process are simulated, and data are collected in real time through the GNSS antenna head and the inertial navigator; and data analysis and precision analysis are performed on the collected data in the simulation experiment process. Compared with the prior art, the application can realize dynamic simulation of the posture of the pipe section in the pipe section floating and sinking process, can collect relevant three-dimensional data, and can realize simulation of the position and posture of the whole pipe section.

The invention discloses an immersed tunnel joint numerical simulation method considering a foundation differential settlement effect, and belongs to the technical field of settlement simulation, the method comprises the following steps: constructing a joint rigidity weakening equivalent PD shell model based on a near field dynamics plate shell basic theory, and obtaining a motion equation under a global coordinate system through coordinate transformation; an ideal elastic-plastic soil spring is used for representing soil-tunnel interaction, and a flexible joint is simulated through a local weakening method; dispersing the immersed tunnel by a meshless method, applying a soil spring by volume force and applying differential settlement in a quasi-static state; and solving the equation by adopting a self-adaptive dynamic relaxation format, and outputting pipe joint longitudinal deformation, joint opening amount and cracking risk results. According to the method, the pipe joint and joint deformation of the immersed tunnel under continuous and discontinuous working conditions can be evaluated more accurately, and the possible cracking risk can be effectively predicted.

The invention relates to the technical field of underwater tunnel engineering, and provides a composite immersed tube foundation and a construction method thereof.The foundation comprises a pile foundation, the pile foundation comprises a plurality of pile bodies arranged at intervals in the transverse direction and the longitudinal direction and elastic buffer assemblies on the pile bodies, and the pile bodies are at least partially fixed below the seabed surface; the elastic buffering assembly is arranged at one end of the outer side of the pile body. And the bearing platform is connected and arranged on the multiple pile bodies through the multiple elastic buffering assemblies, a placement plane suitable for placement of the immersed tube tunnel is formed on the bearing platform, and movable adjusting supports are arranged on the two sides of the placement plane so that positioning butt joint of the immersed tube tunnel can be guided by adjusting the adjusting supports. According to the composite immersed tube foundation, main loads are borne through the multiple pile bodies, uniform distribution of the loads is achieved, and differential settlement is remarkably reduced. The movable adjusting supports are arranged on the two sides of the bearing platform placement plane, and fine adjustment and accurate guiding are allowed to be conducted in the final sinking stage of the immersed tube tunnel.

The invention relates to a construction method of a liquefied soil layer ecological anti-seismic floating embankment. Comprising the following steps of branch plate uplift pile construction, transition cushion layer and pull anchor rod first-time extension construction, core pile construction, immersed tube gravel pile and pull anchor rod second-time extension construction, hollow cover plate construction, branch plate uplift gravel core pile composite foundation construction, force transmission frame structure installation, pervious concrete layer construction, damping connecting beam construction and EPS ecological floating embankment construction. The ecological anti-seismic floating embankment has the beneficial effects that under the limiting effect of a connecting truss side edge blocking head in a force transmission frame structure and a blocking hook on the upper portion of a pulling anchor rod in a supporting disc anti-pulling gravel core pile, fluctuation changes of floating and sinking of the EPS floating embankment layer are within a small range, and then the overlarge fluctuation process of floating and sinking of the ecological anti-seismic floating embankment of the liquefied soil layer is prevented; under the action of an earthquake, horizontal waves or transverse waves of the earthquake can be better counteracted through the damping connecting beams arranged in the longitudinal and transverse directions, and large longitudinal and transverse deformation of the EPS ecological floating embankment under the action of the earthquake is reduced.