70 results about "Cross sea" patented technology

The invention relates to a fitting method for seabed near-fault seismic oscillation. The fitting method comprises the following steps: S1, calculating a seismic oscillation transfer function of an offshore site; S2, fitting high-frequency components of seabed seismic oscillation to obtain high-frequency acceleration time-history components of near-sea area near-fault seismic oscillation; S3, fitting low-frequency pulse components of the seabed seismic oscillation to obtain a low-frequency pulse type acceleration time history of the seismic oscillation; and S4, superposing the high-frequency acceleration time-history components with the translated low-frequency pulse type acceleration time history to obtain seabed near-fault seismic oscillation. According to the method, the bottleneck of lack of seismic oscillation records in existing cross-sea structure seismic analysis can be practically solved; the accurate and reasonable seismic oscillation input is provided for seismic performanceanalysis of the seabed near-fault structure; and the anti-seismic performance evaluation of the ocean structure can be promoted and improved.

The invention belongs to the technical field of structural engineering, and particularly relates to a cross-sea bridge wind barrier designing method. A bridge floor wind speed field model with a wind barrier and a bridge floor wind speed field model without the wind barrier are established respectively by combining wind tunnel tests and numerical wind tunnels, the simulated height and simulated ventilation ratio of the wind barrier in the bridge floor wind speed field models are changed constantly, the bridge floor equivalent wind speed and the wind speed reduction factor are calculated and compared with the traffic safety wind speed of typical vehicle types, and the height and the ventilation ratio of the wind barrier in safety are the height and the ventilation ratio of the wind barrier needing to be designed. According to the cross-sea bridge wind barrier designing method, when the wind barrier of a cross-sea bridge is designed, conventional factors are taken into consideration, and the influences of multiple wind directions and the influences of multiple bridge types are also proposed to be taken into consideration. Meanwhile, the measure of combining the wind tunnel tests and the numerical wind tunnels is adopted to determine the wind speed fields and obtain the height and the ventilation ratio of the wind barrier, the wind barrier is then designed, and thus the designed wind barrier is more reasonable, more economical, and capable of practically meeting the engineering requirements and powerfully ensuring traffic safety.

A high-durability connecting method of a prefabricated pier shaft with a cushion cap of a bridge spanning the sea, relates to a big bridge pier with high-durability connecting between the prefabricated pier shaft and foundation in the sea corrosion environment; wherein, the prefabricated pier shaft, the cushion cap are connected with wet connector concrete in the middle, the under-part of the prefabricated pier shaft is provided with a flaring transition section and a straight line section, the reservation steel bars of the prefabricated pier shaft in the middle of the wet connector concrete are connected with the reservation steel bars of the cushion cap by double side welding, and a water-seal rubber strip is arranged between the prefabricated pier shaft and the cushion cap. The wet connector concrete is isolated with the sea corrosion environment by a prefabricated pier shaft wall, which puts an end to the situation that the injurious ingredient in the sea invades into the inner of the wet connector; the body of the prefabricated pier shaft is prefabricated in a land factory, therefore, the quality can be controlled effectively and the probability of the surface crack occurrence is lowered; employing the corrosion prevention system can greatly improve the self-durability of structure and effectively block corrosion channels, therefore, the service life of structure can be extended.

The invention relates to a cross-sea elevation datum transmission method for determining our nation's territorial sea island elevation, comprising the following steps of: calculating the land elevation datum begins reckoning geopotential value by the use of the relation between the geopotential and the elevation; deriving the formula for calculating the cross-sea geopotential difference; calculating the geopotential value of one point in a sea area according to the calculation formula and marine gravitational field data, determining the elevation value of the point corresponding to the elevation value of the land elevation datum to realize the accurate transmission of cross-sea elevation datum. The inner precision and the practical accuracy of the method provided by the invention are respectively estimated and checked by using data from 33 tide gauge stations in the offshore of China and 54 tide gauge stations on Japan's coast. The result of a test shows that the method provided by the invention can be used to transmit China's elevation datum in 1985 to sea areas near the islands and convert sea area GPS geodetic height into an elevation value of the elevation system in 1985 with the precision being better than 10 cm.

The invention discloses a sea-crossing bridge dynamic response calculation method based on wind wave load combination. The sea-crossing bridge dynamic response calculation method comprises the following steps that 1, Establishing the coupling relationship between wind and wave and wind flow respectively; Step 2: Determining the wind, wave and flow parameters of different return periods, and obtainWind-wave-flow combination in a certain return period according to the coupling relationship of step 1.; Step 3: Determining the wind load point coordinates to generate a random wind field to obtainthe wind load; Step 4: Determining the wave flow point coordinates to generate a random wave flow field, and obtaining the wave load and the water flow load; 5: According to the wind-wave-flow combination obtained in step 2 and the load obtained in steps 3 and 4, obtaining the wind- wave-lfow load combination T; step 6: bringing the combination obtained in step 5 into the bridge across the sea toobtain dynamic response of the bridge. the invention fully considers the coupling relationship between the wind and the waves, and is more suitable for the actual situation, and is applied to the engineering design to reduce the engineering cost.

The invention provides a method comprehensively constructing an urban air highway by high-rise buildings and a suspended cable-stayed bridge. The method is mainly characterized in that the urban high-rise buildings and the cross-sea suspended cable-stayed bridge are comprehensively and architecturally designed together to be applied to the urban air traffic highway, when we design and construct the urban high-rise buildings, the urban high-rise buildings are constructed according to a foundation of the cross-sea suspended cable-stayed bridge, a bridge body is designed and constructed according to structures of the high-rise buildings, after the high-rise buildings are constructed, a function that suspension steel cables are mounted at the top ends of the buildings by the suspended cable-stayed bridge to connect anchors with a bridge deck as well as a function of allowing people to live due to the structures of the high-rise buildings are achieved, double benefits are achieved, and therefore, a plan of installing the cross-sea suspended cable-stayed bridge by the aid of the urban high-rise buildings to construct an urban air highway traffic network can be realized.

The invention provides a seaborne settlement observation and measurement method, which mainly comprises the following steps of: arranging settlement deformation measurement points, and establishing a settlement deformation observation reference network; observing a sea pier of the cross-sea bridge; carrying out elevation transmission; carrying out precise triangulation elevation observation; performing second-class level observation; after observation and information recording are carried out, carrying out data processing, carrying out adjustment calculation after closure error, median error and the like meet requirements, carrying out rigorous adjustment on a leveling line, and selecting software which is authenticated to be qualified; and inputting the result data into a database according to a unified format. The method is suitable for long-term observation of the abutment body in water and sea, the stability degree of the structure can be monitored synchronously in the construction process, reliable data basis is provided for the next construction procedure, and the efficiency of railway construction is improved.

The invention discloses a bridge pier fence netting of a cross-sea bridge. The bridge pier fence netting comprises two symmetrical steel cables arranged outside a bridge pier facing tides, at least five supporting bars are connected between the two symmetrical steel cables, a protective net is arranged in the two symmetrical steel cables, floating ropes are arranged on the two sides of the protective net and are fixedly connected with the at least five supporting bars, each floating rope is provided with at least five colored floaters, each steel cable is connected with at least five pile cables, and the pile cables are connected with undersea fixing piles. Therefore, frontal sea waves, tidal ranges and sundries along with the tides can be blocked by the bridge pier fence netting, impactive abrasion of the sea waves and the sundries in water on bridge piers is reduced, and the bridge piers of the cross-sea bridge are protected.

The invention discloses a construction method for a steel guide wall foundation of a sew area deep-water anchor foundation, and the construction method is applied to suspension bridge anchor foundation construction of sea area deep-water. The construction method comprises a foundation treatment step, an auxiliary steel platform set-up step, a steel guide wall construction step, an even wall slot section division step, an II-stage slot sand backfilling step, an I-stage slot construction step, and an II-stage slot construction step. According to the construction method disclosed by the invention, foundation treatment is performed at an early stage to improve geological conditions, the auxiliary steel platform is set up to create land-area working conditions, steel tube piles are positioned,inserted and punched to inner and outer sides of the axis of an even wall, and construction on the even wall is performed, so that the effects of supporting, retaining water and retaining waves are realized for later-stage foundation pit excavation. The construction method solves the technical problems such as construction hole collapse, a relatively long construction period and disassembly afterconstruction as sea suspension bridge deep-water anchor construction in the prior art needs cofferdams for building an island, reduces construction risk, shortens the construction period, and providesa novel technical method for constructing and applying a cross-sea channel kilometric suspension bridge.

A sea-cross high-speed tunnel structure suspended in water includes a pipe body capable of suspending in water. The pipe body is formed by fixedly connecting a plurality of pipe sections. A reinforced concrete horizontal partition plate for dividing each pipe section to form an upper chamber and a lower chamber is fixed in each pipe section. Two closed tunnels arranged along a length direction of the pipe body are disposed in the upper chamber. Reinforced concrete fin plates are symmetrically disposed in a horizontal direction outside the pipe sections. A steel closed tunnel shell fixed to the reinforced concrete horizontal partition plate is disposed in the upper chamber. A rail bed is disposed in the steel closed tunnel shell. Electromagnetic regulating devices disposed transversely are fixedly connected between both sides of the rail bed and the steel closed tunnel shell.

The invention discloses a transmission line cross-sea over-water Dyneema traction construction method. The method is characterized by comprising the steps that a first anchor tower and a plurality ofcrossing towers are installed on the coast, and a traction field and a high-span anchor tower are installed on the opposite coast; a first rope is unfolded from the first anchor tower to a plurality of second crossing towers, and then the first rope is unfolded to the coast through the plurality of second crossing towers; one end of a third rope is fixed to the traction field, the third rope on the opposite coast is unfolded from the traction field to the high-span anchor tower, and then the third rope extends to the side of the opposite coast; the first rope is connected with one end of a wear-resistant second rope, the other end of the second rope is fixed to a tractor tug, and then the tractor tug carries the other end of the second rope to the opposite coast; and the other end of the second rope and the other end of the third rope are in butt joint for lift-off. The method can be widely applied to transmission line cross-sea leading rope unfolding construction, is simple in procedure, safe and reliable, and greatly improves the working efficiency of construction.

The invention discloses a seabed type chain clamping driving continuous penetration static sounding device which comprises a rack and a probe rod probe, a balancing weight is fixedly installed on one side of the rack, a leveling mechanism is fixedly installed on the inner side of the rack, a clamping device is fixedly installed at the bottom of the inner side of the rack, and a chain clamping driving mechanism is installed on the inner side of the rack. A meter counter is fixedly installed on the top of the inner side of the rack, a pulley block is fixedly installed on the inner side of the rack, and a hydraulic system is fixedly installed on the inner side of the rack. The device is compact in structure, modular in design, stable and reliable in work, low in energy consumption, high in cost performance and suitable for popularization and application, video monitoring is achieved in the whole process, and the requirement for automatic and continuous penetration of general underwater static sounding can be met. The device can be widely applied to survey tasks such as static sounding of a series of offshore engineering projects such as wharf construction, offshore wind power, cross-sea bridges and tunnels, energy exploration and development, military logistics support, submarine pipeline laying, offshore artificial islands, marine ranches and marine scientific research.

The invention provides an incremental launching semi-submersible cross-sea landing floating bridge, belonging to the field of ship marine engineering technique. The floating bridge is assembled by a pushed floating box, a basis floating box and a beachhead floating box which are connected with a tugboat by the buckling between handle retaining blocks and handles. The floating boxes are connected with each other by an underwater transverse joint part and an underwater longitudinal joint part. The floating box is internally provided with inflatable chambers and fixed air chambers. The top end of the inflatable chamber is provided with an electric-controlled deflation valve and an inflation valve is arranged below the left inclined part. The tugboat is provided with a compressor and an electric control unit. When the compressor is started, the inflation valve can be used to inflate the inflation chamber, thus leading the floating bridge to float upwards and facilitating the landing transport. The electric control unit emits the signal and opens the electric-controlled deflation valve so as to lead the inflatable chamber to deflate and the floating bridge to be submerged. The floating bridge has the flexibility of changeable length and width and the concealment of hiding under the water; the floating bridge can move and migrate freely in the horizontal direction and can select the landing point at any points, have wide application range, low manufacturing cost, low cost and quick and convenient assembly.

The invention discloses a cross-sea elevation measuring method and system, wherein the method comprises: analyzing the measurement result of each measurement, judging whether it meets the measurement requirements or not, adding measurements, screening to obtain more accurate measurement results during measuring, repeating the steps aforementioned such that all final measurement results meet the measurement requirements. Therefore, the impact of the instability of an offshore measuring platform upon cross-sea elevation measurement can be overcome, time for cross-sea elevation measurement is shortened, and measurement efficiency is improved greatly.

The invention discloses a wave-dissipating and load-reducing protection device for a sea-crossing bridge high pile cap foundation, which comprises an annular protection plate and a supporting part, a plurality of uniformly distributed through holes are formed in the annular protection plate, and the through hole rate of the through holes in the annular protection plate is 35%-55%; the annular protective plate is vertically and fixedly connected to the outer surface of the high pile cap, the top face of the annular protective plate is flush with the designed water level, the thickness of the annular protective plate is 1 / 8-1 / 5 of the designed wave height, and the length of the annular protective plate is 1 / 20-1 / 10 of the designed wave length; one end of the supporting component is connected with the lower surface of the ring type protection plate, and the other end of the supporting component is connected with the high pile cap. According to the invention, the perforated ring-type protective plates and the supporting parts can be utilized to obviously improve the lateral wave load of the high-rise pile cap from the three mechanisms of inhibiting the climbing of surface waves, changing the wave form and increasing the energy dissipation of the wave, a certain ship collision prevention capability is provided for the high-rise pile cap foundation of a sea-crossing bridge, and technical support is provided for sea-crossing traffic engineering.

The invention discloses a region prediction method for the sea wave field and wind speed field of cross-sea bridge construction, and the method comprises the steps: obtaining sample sea wave data forecast by a marine meteorology organization before the construction of a construction sea, and building a sample sea database; enabling the construction seat to be divided into a plurality of prediction monitoring regions, obtaining the actual measurement wave data of each prediction monitoring region, and building all prediction monitoring region databases; taking the sample sea database as an input learning sample, taking all the prediction monitoring region databases as output samples, and respectively building the corresponding relation between the actual data of each prediction monitoring region database in each day and the forecast data in the sample sea database at this day; extracting the wave height and wind speed forecast data of the sample sea in a future time period from the marine meteorology organization, taking the wave height and wind speed forecast data as the input data, and calculating the corresponding wave height and wind speed forecast data of each prediction monitoring region in the future time period. The method provides environment guide for the bridge construction.

The invention discloses an electromagnetic vibration reduction device for a quasi-cylindrical pier of a cross-sea bridge. The electromagnetic vibration reduction device comprises electrodes, permanent magnets, a magnetic pole connector, an electrode connector, a housing and an electrode controller, wherein each electrode is connected into an annular shape through the magnetic pole connector; each permanent magnet is connected into an annular shape through the electrode connector; the thicknesses, the inner diameters and the outer diameters of the electrode and the permanent magnet are the same; the magnetic poles of two semi-annular permanent magnets in the same annular permanent magnet are opposite, the upper polarity and the lower polarity of each of two adjacent annular permanent magnets are opposite, and the polarities of two adjacent electrodes are opposite; the housing is arranged outside the electrodes; and the plurality of annular electrodes are connected with the electrode controller through conductive wires respectively. The electromagnetic vibration reduction device disclosed by the invention is capable of bilaterally controlling a flow field around a pier stud, effectively suppressing a wake flow vortex generated due to separation of boundary layers at the two sides of the pier, and then greatly suppressing the vortex generation vibration of the quasi-cylindrical pier; and meanwhile, the electromagnetic vibration reduction device further has capacities of resisting scouring, resisting an ocean current impact force and the like to a certain extent.

The invention discloses a submarine vacuum pipeline test line capable of extending into an application line and an implementation method thereof. The submarine vacuum pipeline test line comprises a land section vacuum pipeline, a near-shore submarine embedded section vacuum pipeline, a submarine elevated section vacuum pipeline and a submarine pipe pier, the land section vacuum pipeline, the near-shore submarine embedded section vacuum pipeline and the submarine elevated section vacuum pipeline sequentially communicate with each other, and the submarine pipe pier is used for supporting the submarine elevated section vacuum pipeline; an inner removal seal head and an extension butt joint are arranged at the terminal end of the submarine elevated section vacuum pipeline; and an air brake cabin is arranged at the head end of the land section vacuum pipeline. The invention further discloses the implementation method of the submarine vacuum pipeline test line. The section of the submarine vacuum pipeline is far smaller than that of a traditional tunnel, and the construction cost is greatly lower than that of a traditional tunnel; and after the test task is completed, the line trend of the cross-sea channel needing to be built is further extended, so that the test line is extended into the application line, the construction cost is saved, the resource utilization rate is improved, and the cross-sea channel engineering construction process is accelerated.

The present disclosure provides a sea tunnel, and relates to the technical field of sea-crossing bridge tunnels. The sea tunnel comprises a body; and the body has a hollow cavity extending from one end to the other end, the cavity is divided into mutually independent first cavity and second cavity by a passage pavement, the first cavity is mainly used for passing and is wholly or partly protruded out of the sea level, the second cavity is immersed in the seawater, water holes are formed in the second cavity, and the second cavity is communicated with the seawater through the water holes. When the seawater impacts one side of the body, the second cavity is immersed in the seawater, and the seawater flows into the second cavity, so the body is not easy to be flushed over by the seawater.

The invention discloses a method for reducing the external water pressure of a deep-buried cross-sea shield segment of a sandy soil stratum. The method for reducing the external water pressure of thedeep-buried cross-sea shield segment of the sandy soil stratum comprises the steps that first, after the shield segment is assembled, soil bodies within a certain range of the outer periphery of a segment ring are subjected to grouting reinforcement, so that the strength of a sand soil layer is improved, and the permeability is reduced; secondly, a plurality of pressure-limiting drainage valves are arranged on the segment ring by every a plurality of distances in the longitudinal direction of a tunnel; and finally, monitoring is strengthened to ensure that the water pressure of the outer periphery of the segment ring does not exceed a design value. The method for reducing the external water pressure of the deep-buried cross-sea shield segment of the sandy soil stratum is beneficial for reducing the water pressure acting on the segment, the thickness of the segment ring is reduced, the effective utilization rate of the tunnel section is improved, and the cost of the tunnel is greatly saved.

The invention relates to a cross-sea bridge with floating piers. The cross-sea bridge with the floating piers includes three bridge decks, multiple floating piers and multiple bases. The floating piers are uniformly arranged at intervals in the extending directions of the bridge decks, and three bases are uniformly and fixedly connected to the top of each floating pier at intervals. The three decks all extend in the direction perpendicular to the shoreline, each deck is formed by connecting a plurality of bridge deck sections head to tail, and one bridge deck section is connected to the top ofeach base. A horizontal propulsion system for stabilizing the horizontal positions of the floating piers is arranged at the bottoms of the floating piers, chambers for containing seawater are formedin the floating piers, and the chambers are internally provided with water-entering-and-draining systems for adjusting the vertical heights of the floating piers, and vertical gravity devices for stabilizing the floating piers are further arranged at the bottoms of the floating piers. The cross-sea bridge with the floating piers has the beneficial effects that the floating piers float on the sea surface with no need to cast steel bars into the seabed and pour cement, and the construction is simple.

The invention discloses a water body damping device and method for controlling vortex vibration and flutter of a cross-sea and cross-river bridge. The water body damping device comprises a water body damping device, and the water body damping device is connected to the lower portion of a main beam through a steel cable and immersed in water; the water body damping device comprises a steel frame and water resistance cups, one end of each water resistance cup is provided with a blocking ring and a water resistance cup cover, the water resistance cup cover is arranged between the water resistance cup and the blocking ring and movably connected with the water resistance cup, and the blocking ring is used for blocking the water resistance cup cover from being opened towards the outside of the water resistance cup; the multiple water resistance cups are arranged on the steel frame in the direction that the water resistance cup covers face downwards. The action force between the water resource under the bridge and the device is utilized to hinder the movement of the main beam, and the effect of restraining vortex vibration or soft flutter of the bridge is achieved. The control effect of controlling multi-order vortex vibration can be achieved by installing the water damping devices at different bridge span lengths. The underwater device is folded in daily bridge operation, and underwater navigation and the attractiveness of the bridge are not affected.

The invention discloses a method for calculating gravitational potential difference between sea-crossing elevation points, which is used for determining the elevation of islands (reefs) around the land in coastal countries. The method comprises the steps of carrying out astronomical geodetic plumb deviation, gravity and GNSS geodetic height measurement on elevation points on two sides of land and an island; measuring measuring point gravity data and GNSS sea surface height between land and sea in a shipborne gravity / GNSS measuring line mode, and reducing corrected gravity / geodetic height data to an average sea surface; deducing a calculation formula of a gravity potential difference between sea-crossing elevation points according to a gravity potential theory and an astronomical level principle; in combination with astronomical earth vertical line deviations on elevation points on the two sides of land and sea, improving the vertical line deviation precision of measuring lines and measuring points according to a removal-recovery technology; and substituting the result into a deduced gravitational potential difference calculation formula to realize sea-crossing gravitational potential difference calculation. The gravitational potential difference between sea-crossing elevation points is calculated by utilizing actually measured elevation point data of a certain place in Shandong Province, the distance of the elevation points is about 10.5 km, and an elevation value calculated according to the gravitational potential difference meets the level measurement accuracy requirement of the national level measurement specification III.

The invention provides a hoisting platform for erecting water large bridges to meet the requirement for erecting the water large bridges. At present, the industrialized production mode has been adopted in cross-sea bridge construction, but existing equipment can not meet the requirement for erecting the water large bridges. Two barges are arranged left and right and are spaced by a certain distance by the standard that the bridges can be transported between the two barges. The hoisting platform is arranged at the upper portions of the two barges and composed of a plurality of supporting legs, inclined struts, a main beam, connecting beams and a diamond inclined strut. A plurality of hoisting devices are installed on the main beam.

The invention discloses a spliced deep foundation pit slope protection device, and belongs to the technical field of cross-sea channel construction. The spliced deep foundation pit slope protection device comprises an upper protection panel and a lower protection panel. Two splicing grooves A are symmetrically formed in the bottom surface of the upper protection panel. Plug-in components are arranged in the splicing grooves A. Two splicing grooves B are symmetrically formed in the top surface of the lower protection panel. Locking components are arranged in the splicing grooves B. The plug-incooperation of the plug-in components and the locking components is used to plug-in and fix the upper protection panel and the lower protection panel. The installation method has a small amount of engineering, low cost, and easy installation. Two buffer pads are welded in a symmetrical structure on the front end surfaces of the upper protection panel and lower protection panel. Polyurethane foam materials and springs A in the buffer pads are used to prevent falling rocks from damaging the two protection panels and improve the impact resistance of a slope protection structure. The device is reasonable in structure design and easy to popularize.

The invention provides a light long-distance sea-crossing intelligent permanent railway and highway floating bridge low in manufacturing cost and short in construction period, and the design thought for building a sea-crossing bridge is fundamentally changed. The biggest problem is solved, piers do not need to be built on the strait seabed, the construction difficulty and the engineering quantityfor building the cross-sea bridge are greatly reduced, and the influence on the strait ecological environment is small. The technical key points are as follows: 1 floating islands are built by utilizing seawater buoyancy, each floating island is firmly grasped by a seabed rooting stainless steel wire rope, the floating islands are synthesized by cheap materials, and bridges are erected on the floating islands; 2 the seabed rooting stainless steel wire rope of the floating pier is tied and pulled, a movable self-elevating offshore oil drilling platform low in relative cost is used for drillingspecial well holes in the bottom of a strait seabed, each hole comprises a vertical rock well hole body and a horizontal well hole body, and a stainless steel wire rope is embedded in a casing pipe for mud sealing; and 3 in order to reduce the excessive tension of the rising force of the floating islands on the stainless steel wire ropes during rising tide, the equipment for tying the stainless steel wire ropes on the floating islands is an intelligent control electric winch; and 4 the intelligent land bridge head trestle and the bridge are synchronously adjusted.

The invention discloses a method for calculating wave current force borne by a box type upper structure of a sea-crossing bridge. Based on a numerical analysis result of the influence offlow rate, wave characteristics, the immersion coefficient and the geometrical shape of the box girder on the wave current force on the upper structure of the box girder and in combination with a least square algorithm and regression analysis, the immersion coefficient, the dimensionless bridge deck thickness, the dimensionless bridge deck length and the flow velocity are converted into quantized values composed of functions and fitting coefficients, and transverse and vertical wave force borne by the upper structure of the box girder can be simply and conveniently estimated in the form of the product of the gravity of the box girder and the quantized values. The estimation method for calculating the wave current force borne by the upper structure of the sea-crossing bridge box type is applied; the maximum wave current force borne by the box type upper structure of the sea-crossing bridge under different flow rates, wave characteristics, immersion coefficients and box girder geometrical shapes can be simply, conveniently and accurately calculated, and the problem that the wave current force borne by the box girder structure under the combined action of waves and currents cannot be estimated through an existing method is solved.

The invention discloses a construction method of an omega-shaped cross-sea temporary steel trestle. The construction method comprises the steps that 1, a bridge abutment and a steel approach bridge are constructed; 2, two connecting bridge sections are constructed; 3, two transition bridge sections are constructed; and 4, a main bridge section is constructed. The omega-shaped cross-sea temporary steel trestle is erected in a sea-crossing mode under the condition that the geographical positions of an existing wharf, a first dam and a second dam are combined, a steel trestle body and a channel type supporting trestle can jointly provide a safe and reliable construction platform for construction of a bridge to be built, and the construction method of the temporary steel trestle is simple and convenient to construct. The problem that a temporary steel trestle in a super-large-span sea area is difficult to construct is solved, and the construction period can be shortened.

The invention discloses a method for building cross-sea bridges. The method for building the cross-sea bridges comprises the steps that S1, a first mainland and a second mainland are included, a sea area is defined between the first mainland and the second mainland, an artificial island is built in the sea area, and the cross-sea bridges are built between the artificial island and the first mainland as well as between the artificial island and the second mainland; and S2, for a large water area, two or more artificial islands can be built according to the distance, and the cross-sea bridges are built between the artificial islands as well as between the artificial islands and the mainlands. According to the method, the artificial islands are used as media for connecting the water areas, specifically, one or more artificial islands are built in the water areas, then the cross-sea bridges are built between the artificial islands and the mainlands or between the artificial islands, and finally traffic between the two mainlands with a large water area formed therebetween is achieved. According to the method, the building cycle is short, cost is low relatively, the technologies are mature, the economic benefit is good, and the method is convenient to popularize.

The invention relates to a structure wave force measuring method for a sea-crossing bridge. The method comprises: when a structure wave total force analysis instruction is triggered, acquiring all measurement signals according to an analysis time period specified in the structure wave total force analysis instruction, and acquiring all the measurement signals in real time through pressure sensorspasted to all measurement points on the surface of the sea-crossing bridge structure; processing and analyzing each measurement signal to obtain pressure data of each measurement point at the same moment; and according to the pressure data of each measuring point, performing integration along the surface of the sea-crossing bridge structure to obtain the total wave force of the structure, and acquiring on-site measuring signals in real time based on pressure sensors pasted on the measuring points on the surface of the sea-crossing bridge structure to obtain the total wave force of the structure. The measurement accuracy of the total wave force borne by the measurement structure is improved, and damage to a sea-crossing bridge structure is small.