243results about "Public buildings" patented technology

Disclosed in the present invention is a spatial three-dimensional suspended corridor, comprising a suspended corridor that connects indoor floor passageways, wherein diagrid columns are provided on all edge portions of the indoor floor passageways; the suspended corridor comprises several fixed segments and several bridge deck segments from bottom to top; and the fixed segments or corner segments are all connected to the corresponding bridge deck segments by means of node connecting components. In the present invention, by means of some implementable tests and on the basis of having a preliminary understanding of the stress performance of a corridor structure, a corridor simulation model is also established, parameters of the model are continuously optimized for repeated debugging, preliminary stress performance calculations are then performed and compared with results of some previously conducted tests, and if results are quite similar to the test results, this proves that the model is relatively optimal, that is, an optimized model is obtained, and then this model is used to analyze other more complex performances of the corridor. The optimization objective of the present invention is to make the structure and stress of an aerial corridor safer, more reliable and more comfortable.

The present invention relates to the technical field of prefabricated elevated stations. Disclosed are a self-balancing modular fully-prefabricated elevated station transition structure construction method and a structure. The construction method comprises the following steps: constructing precast pipe piles and a precast pile cap; executing concrete backfilling; installing a pier column and connecting same to the pile cap; installing a Y-pier cap for executing a connection; installing a precast middle cap beam and precast side cap beams; installing precast steel tubular columns; installing top overhanging precast reinforced concrete cap beams and a precast reinforced concrete middle cross beam; hoisting and installing precast platform slabs and precast arched platform headwalls; installing precast straddle monorail track beams; and installing a precast steel structure canopy. By using the dual columns to achieve an overhead layer and an upper structure, the present invention reduces the absolute overhanging length, improves the performance of the structure under stress, and reduces the sectional dimensions of components, thus saving the floor area of the pier column to the utmost extent, enhancing the applicability of station structures in a wider range of various urban environments, and improving the universality of the structure.

A self-storage facility with a first set of load bearing modular units (LBMUs) aligned along a same first horizontal plane. The first set has a plurality of rows of LBMUs and each LBMU in each row in the plurality of rows of LBMUs is positioned in a side-to-side relationship with another LBMU in a corresponding row in the plurality of rows of LBMUs. Furth, each LBMU in each row in the plurality of rows of LBMUs is positioned in at least one end-to-end relationship with another LBMU in an adjacent row of a plurality of rows of LBMUs. The facility also includes a first passageway through both sidewalls and transverse to a major axis of each LBMU in a majority of the LBMUs in a first row in the plurality of rows of LBMUs, and a second passageway through both sidewalls and transverse to a major axis of each LBMU in a majority of the LBMUs in a second row in the plurality of rows of LBMUs.

The invention relates to a double-column double-layer double-overhanging assembly type elevated station structure and a combination method thereof.The elevated station structure comprises two pier columns, a station hall layer overhanging cover beam, two stand columns, a platform plate lower layer overhanging cover beam, platform layer pier columns and platform prefabricated beams; the two station hall layer cantilever cover beams which are in mirror image with each other are connected through a first node and are supported on the pier columns; the stand columns are aligned with the pier columns and supported on a cantilever cover beam of a station hall layer. The two platform plate lower-layer overhanging cover beams which are in mirror image with each other are connected through a second node and are supported on the stand columns; the platform layer pier columns are supported on the platform plate lower layer overhanging cover beam. The platform prefabricated beam is supported on the platform layer pier columns, and the burden of the overhanging cover beam of the station hall layer is reduced in a double-layer overhanging mode. The problems that an existing elevated station structure is poor in safety redundancy, large in component dead weight and poor in maintainability are solved.

The present invention relates to the technical field of transportation engineering and municipal engineering construction, specifically to an isolation structure and method for over-station construction. An isolation structure for over-station construction, comprising a transversely arranged horizontal steel beam and a longitudinally arranged main steel beam, characterized in that: an isolation membrane structure is provided on the transverse steel beam and the main steel beam, the lower end of the isolation membrane structure is connected to a dense-mesh safety green net, the lower end of the dense-mesh safety green net is connected to a vertical hard isolation structure, and the vertical hard isolation structure is located on the inner side of the platform. Compared with the existing technology, it can be constructed during the operation of the train, and after it is erected, it has high-demand isolation and safety protection, and is fully isolated from the track area, so that the construction in the station and the train operation do not affect each other, thereby improving work efficiency and construction safety.

The utility model discloses an undercurrent platform system for purifying a landscape water body, and relates to the technical field of water pollution prevention and control. The device comprises a pretreatment tank, a plurality of subsurface flow purification units and a plurality of surface flow purification units, and is characterized in that the surface flow purification units are positioned at the downstream of the subsurface flow purification units, and shoal wetland units are arranged at the downstream of the surface flow purification units; the subsurface flow purification unit and the surface flow purification unit operate in parallel, and the plurality of purification units are arranged in a platform type according to the bank slope height difference. According to the utility model, the subsurface flow platforms, the surface flow wetland and the shoal wetland are established, the physical, chemical and biological actions in the subsurface flow process are utilized, pollutants in the water body are effectively removed, the subsurface flow purification unit and the surface flow purification unit are formed by a series of platforms arranged in parallel, so that the water body forms subsurface flow and surface flow between the platforms, and the water body is purified. Through absorption of plants, degradation of microorganisms and adsorption of bottom mud (water purification materials), pollutants are removed or converted into harmless substances.

The invention relates to the field of assembly type subway station structure engineering. The buffering and vibration isolation device comprises two bottom plates and two frames, the number of the bottom plates is two, the number of the frames is two, and the frames are arranged at the top ends of the bottom plates; the transverse rods are installed at the top ends of the two bottom plates correspondingly and located on the inner sides of the two frames, and a plurality of rectangular through grooves are formed in the transverse rods; the plurality of longitudinal rods respectively penetrate through the plurality of rectangular through grooves; according to the transverse vibration isolation mechanism, when the cross beam is subjected to transverse force, a baffle moves in a shell, a fourth spring is attached to a cylinder to stabilize deformation buffering, a first elastic piece and a second elastic piece are matched through an inclined face or a protrusion, transmission force is evenly distributed, cooperative buffering is achieved, and impact vibration generated when the beam column connection is subjected to longitudinal and transverse force is effectively reduced; the service life of the device is prolonged; and the safe and stable operation of the structure is maintained.

The bridge space curved surface single-column special-shaped cable bent tower comprises an oval bearing platform arranged at the top of a bridge tower foundation, a conical tower base is arranged at the bottom of the bearing platform, a lower tower column is arranged at the top of the tower base, the section of the joint of the bottom of the lower tower column and the tower base is round, and the section of the top of the lower tower column is in a round end shape. A middle tower column is arranged at the top of the lower tower column, the section of the joint of the middle tower column and the lower tower column is in a round end shape, the top section of the middle tower column is round, an upper tower column is arranged at the top of the middle tower column, and the section of the upper tower column is round and is gradually increased upwards from the bottom section to the top section of the upper tower column. A plurality of stay cables and auxiliary cables are arranged on the two sides of the upper tower column in the longitudinal direction of the bridge. By the adoption of the oval bearing platform and the tower base, the water blocking ratio of the bridge tower is reduced, the cable bent tower is designed to be round and round-end-shaped, the upper tower column is waisted and made into a fiber waist shape, the wind resistance coefficient is reduced, and the stability and safety of a bridge are improved.

The utility model discloses an indoor stadium spiral suspension corridor which comprises a bridge body, the bridge body is installed in a stadium and arranged upwards in a spiral mode, the bridge body is divided into a plurality of bridge floor sections from top to bottom with the distance between two adjacent stand columns in the stadium as the reference, the bridge floor section at the starting point position is connected to a suspension type visiting room arranged in the stadium, and the suspension type visiting room is connected with the bridge floor section at the starting point position. The bridge floor section at the final position is connected with a foundation through a multi-stage damping device; outer chord members are arranged on the outer sides of the bridge floor sections; and the inner chord members and the outer chord members are connected with the truss through suspenders. The spiral suspension corridor is arranged in the courtyard of the venue, the space of the courtyard is fully utilized, the functional requirements of visit and touring of the venue are met, the beauty of a building is fully reflected, the bridge floor section spirally ascends, the situation that the structure is shielded by surrounding buildings is avoided, pedestrians can conveniently watch large-range surrounding landscapes, and the visit effect of the venue is improved. A multi-stage damping device is arranged at the contact position of the bottom of the bridge floor section and the ground, and the anti-seismic performance of the bottom of the bridge floor section and the ground is ensured through the arrangement of the multi-stage damping device.

The utility model discloses an ancient tree protection structure, which solves the problem of inconsistent elevation of the ancient tree in-situ ground and the newly-built ground of a newly-built project soil layer by backfilling the ancient tree in-situ ground and arranging a plurality of retaining walls on the backfilled soil layer, so that the ancient tree does not need to be excavated and transplanted, and the in-situ protection of the ancient tree is realized. The survival rate of the ancient trees is improved, and the ancient trees can be protected conveniently; a plurality of retaining walls which are distributed in a step shape are arranged on the inclined slope surface of the backfill soil layer, the soil retaining effect of the retaining walls is exerted, landslide of backfill soil is avoided, meanwhile, steps are built on the inclined slope surface of the backfill soil layer, tourists can play and appreciate the steps, the whole protection structure and ancient trees are fused to form a natural landscape, the landscape is attractive, and the service life of the landslide is prolonged. And the user is delightful.

The utility model relates to the technical field of railway building components, in particular to a tree-shaped beam column structure for a railway station canopy, which comprises a support rod, the upper part of the left end and the upper part of the right end of the support rod are fixedly connected with fixing frames, and the lower end of the support rod is fixedly connected with a fixing plate. A drainage channel is formed in the middle of the upper end of the supporting rod and the middle of the upper end of the fixing plate, and a plurality of fixing holes are formed in the upper end of the fixing plate. According to the tree-shaped beam column structure for the rain shed of the railway station, due to the fact that the two fixing frames are arranged, when the tree-shaped beam column structure is used for installing and using the rain shed, the three supporting plates in the fixing frames can absorb and weaken wind vibration generated by the rain shed, the damping effect can be achieved, and the situation that the rain shed is damaged in the strong wind weather is avoided. The rain shed is damaged due to the wind vibration effect, the drainage channel is formed in the upper end of the device, when the device is used, rainwater falling on the rain shed slides to the upper portion of the supporting rod and flows away through the drainage channel, and it is avoided that the rainwater is retained on the upper portion of the device to cause corrosion of the device.

A city flood simulation training base, which relates to the field of flood control simulation technology. It includes a waterlogging simulation block set on a foundation, the top of the foundation is higher than the ground of the waterlogging simulation block, the waterlogging simulation block is provided with at least two different simulation areas, one of which is used to simulate vehicles trapped in water, and the other is used to simulate buildings trapped in water, a helicopter rescue area is set on the foundation, the water depth of the helicopter rescue area is greater than the water depth of the waterlogging simulation block, and the water areas of the two are connected, the helicopter rescue area is used to simulate the start of helicopter propellers to generate wind pressure to affect the water area, a kayak training river is set on the foundation, the kayak training river is set in a strip shape, and the kayak training river is connected to the water area of ​​the helicopter rescue area, and a pump house is set on the side of the waterlogging simulation block away from the helicopter rescue area, and the pump house is used to provide water flows of different flow rates to the entire training base. Thus simulating the most common and dangerous rescue scenes in urban flood control and rescue.

The invention provides a vehicle self-adaption compatible open island type elevated BRT station system which comprises an open island type elevated station structure, the elevated station structure comprises a ground layer and a two-layer composite layer arranged above the ground layer, and the two-layer composite layer comprises an open pedestrian overpass and an island type platform. The open type pedestrian overpass and the island type platform are of an integrated station-hall-free structure. The elevated station structure further comprises a central vertical traffic core connected with the ground layer and the two-layer composite layer. Passenger doors are arranged on the left side and the right side of a vehicle body of the BRT vehicle, a vehicle control system and an in-vehicle fare collection system are arranged in the BRT vehicle, and the vehicle control system is configured to automatically or manually control the passenger door on the corresponding side to be opened or closed according to the type of a stop platform. Through cooperation of station structure innovation, operation mode opening and vehicle configuration intelligence, the problems that a traditional BRT system is large in occupied area, poor in compatibility and rigid in dispatching can be solved.

In winter, sandboxes are cold and the sand is cold, so children tend to prefer playing indoors rather than outside. This invention aims to provide a sandbox that effectively maintains a suitable sand temperature for children to play in, while reducing the amount of electricity required to power the heating equipment, in order to encourage children to actively play outside when heating is installed in the sandbox. [Solution] A sandbox is provided having a sandbox body, the sandbox body being filled with sand, and characterized in that the entire outer periphery, bottom, and top of the sandbox body are surrounded by an insulating material.

The present application relates to the field of prefabricated subway station structural engineering. Specifically disclosed is a buffer vibration isolation device for connecting station structure beams and columns, comprising: a base plate and a frame, wherein the base plate and the frame are respectively provided in two pieces, and the frame is provided at the top of the base plate; a cross bar, wherein a plurality of the cross bars are respectively installed at the top of the two base plates and located on the inner sides of the two frames, and a plurality of rectangular through slots are provided on the cross bars; a longitudinal bar, wherein a plurality of the longitudinal bars respectively pass through a plurality of the rectangular through slots; when the cross beam is subjected to a lateral force, the baffle moves in the shell, the fourth spring stabilizes the deformation and buffers by fitting with the cylinder, the first elastic member and the second elastic member cooperate through an inclined surface or a protrusion to evenly distribute the transmission force, cooperate in buffering, effectively reduce the impact vibration of the beam-column connection when subjected to bidirectional forces in the longitudinal and transverse directions, ensure the stability and reliability of the structure, extend the service life of the device and maintain the safe and stable operation of the structure.

The utility model relates to the technical field of amusement sand pools, in particular to a castle sand pool which comprises a bottom plate, side surrounding plates are fixed to the edge of the top end of the outer wall of the bottom plate, the four side surrounding plates are matched with the bottom plate to form a square frame, and fixing parts are arranged at the top end of the outer wall of the bottom plate and located at the four corners of the inner walls of the side surrounding plates. According to the detachable sand pool, the bottom plate and the side surrounding plates are spliced and assembled to form the detachable sand pool, so that children do not need to play in a fixed place when playing, the limitation of regions is avoided, the children can normally play indoors, and the detachable sand pool is more convenient for people to use.

The invention relates to a sandbox (1) with a substantially rectangular frame (2) comprising a front and a rear end wall (3, 4) and two side walls (5), and with a cover (7) that can be detachably or permanently attached to the rear end wall (4) and / or to the side walls (5), wherein the cover (7) is supported at least partially by the side walls (5) when closed, characterized in that the upper edges (6) of the side walls (5) supporting the cover (7) when closed are curved in such a way that the cover (7) forms a lying surface (8) when closed.

A steel structure building with an internal through-archway and its construction method includes the following steps: Step 1, pouring concrete for the archway, with openings spaced apart on the side walls of the archway. Step 2, constructing the main steel frame; after completing the main steel frame of each floor, construct the floor slabs and balconies. Step 3, constructing corridors on the floor slabs located on both sides of the archway within the passageway, with connecting corridors spaced apart longitudinally between the two corridors on each floor. Step 4, hoisting the steel roof truss. Step 5, constructing the glass curtain wall around the main steel frame. Step 6, constructing the terracotta roof structure, eaves structure, and glass louvered skylight structure. Step 7, constructing the terracotta sunshade structure on one side of the main steel frame and the terracotta louvered curtain wall on the other side of the main steel frame, thus completing the construction. This invention solves the technical problem that traditional office and commercial buildings can only meet their own needs, cannot effectively integrate with the surrounding environment, and cannot showcase the local cultural characteristics of the region.

The invention discloses a large-span arched girder and main and auxiliary arch cooperated double-layer landscape steel bridge which comprises a steel bridge body, the steel bridge body comprises multiple spans of steel box girders arranged side by side, the two ends of each span of steel box girder are installed on the two banks of a river channel, a motor vehicle lane is arranged in the middle of the steel bridge body, and non-motor vehicle lanes are arranged on the two opposite sides of the steel bridge body; the main arch comprises a plurality of core bearing arched girders, the core bearing arched girders are installed on the upper portion of the steel box girder, the inner arc faces of the core bearing arched girders face the steel box girder, and a plurality of supporting structures are connected between the inner arc faces and the steel box girder; the auxiliary arch comprises two anti-pushing arch beams and a landscape platform, the two anti-pushing arch beams are arranged on the two opposite sides of the main arch respectively, the two ends of the auxiliary arch are installed on the two banks of the river channel, the landscape platform is connected to the arch tops of the two anti-pushing arch beams, the landscape platform is connected to the arch tops of the core bearing arch beams, and sightseeing footpaths are arranged on the anti-pushing arch beams. The large-span landscape bridge solves the problem that landscape, functions and stress are difficult to balance when an existing bridge structure is adopted by a large-span landscape bridge.

The application discloses a visual model structure of a large roof and a construction method thereof, wherein the bottom end of a concrete giant column and a steel column assembly is fixed on a construction site; two planar trusses at least include a first planar truss and a second planar truss; the bottom of a roof system component is supported by the concrete giant column, the steel column assembly and the two planar trusses; two ends of a beam string structure are respectively fixed on the first planar truss and the second planar truss, and two ends of a cable assembly in the beam string structure are respectively connected to the first planar truss and the second planar truss; a secondary beam component is supported by the roof system component and a plurality of beam string structures. According to the application, the installation of the visual model structure of the large roof can be implemented by using a small amount of temporary measures on site, so that the construction cost of the building is reduced, the construction efficiency is improved, and the construction of the entire large roof building structure can be effectively guided.

The utility model discloses a municipal road landscape greening gallery structure which comprises a foundation, the tops of the two sides of the foundation are fixedly connected with stand columns, the tops of the stand columns are fixedly connected with baffles, the baffles are symmetrically arranged, a gap between the baffles is fixedly connected with a fixing frame, the top of the fixing frame is fixedly connected with a supporting frame, and the supporting frame is fixedly connected with the foundation. The top of the supporting frame is fixedly connected with a top cover, the end of the baffle is provided with a hanging frame, the two sides of the foundation are provided with bottom frames, and the top of the top cover is provided with a spraying device. According to the landscape greening corridor structure of the municipal road, unique design and elaborate layout are achieved, the corridor structure is more attractive, the overall image of the municipal road can be remarkably improved, the vertical space of the corridor is fully utilized through the design of the hanging frame and the bottom frame, the greening area is increased, and the spraying device is arranged at the top of the top cover, so that the greening effect is improved. And spraying maintenance can be conveniently carried out on greening, and the greening management effect is improved.

A vehicle for use with an object handling system, the object handling system including two substantially perpendicular sets of rails forming a first grid, a plurality of first uprights supporting the first grid, a plurality of containers arranged in stacks, each stack being located underneath the first grid, one or more robotic load handling devices configured to drive on top of the rails of the first grid, the one or more load handling devices including means for removing or replacing at least one container from the stacks. The vehicle includes two substantially perpendicular sets of rails forming a second grid substantially at the top of the vehicle above a storage space for carrying containers. The second grid interfaces with the first grid to allow the one or more load handling devices to drive from the rails of the first grid onto the rails of the second grid.

The invention relates to a subsea tunnel entrance self-adaptive shading shed and a multi-dimensional rhythm induction system, the subsea tunnel entrance self-adaptive shading shed comprises a shading shed and a ceiling which are connected into a whole, the shading shed is arranged at a subsea tunnel entrance, and the ceiling is arranged at the top of a subsea tunnel. The system further comprises an upper optical rhythm shading shed induction device, a middle lower side wall dynamic rhythm device, a road surface induction device and a multi-mode sensing device. The upper optical rhythm shading shed induction device is arranged on a shading shed and extends to a ceiling, the lower middle side wall dynamic rhythm device is arranged on the side wall of the front end of an entrance of a subsea tunnel and extends to the side wall in the subsea tunnel, and the road surface induction device is arranged on the ground of the front end of the entrance of the subsea tunnel and extends to the ground of the subsea tunnel. And the multi-mode sensing device is arranged on the ground at the entrance of the subsea tunnel. According to the invention, smooth transition of the visual field brightness of the driver, speed adaptive adjustment and attention focusing are realized, and the target of reducing the traffic accident rate of the tunnel entrance section is finally achieved.

The present invention relates to a partition wall structure, which is used for partitioning steel structure building space. The partition wall structure comprises: a keel layer, the keel layer comprises a first keel and a second keel, the first keel is arranged parallel to one side of the second keel, a first filling layer and a second filling layer are arranged in the skeletons of the first keel and the second keel respectively, a first fireproof layer is arranged on the side of the first keel away from the second keel, and a second fireproof layer is arranged on the side of the second keel away from the first keel, and a steel structure component passes through and is connected to the first fireproof layer, the first keel, the second keel and the second fireproof layer. The keel layer comprises the first keel and the second keel arranged in a staggered manner, so that the sound insulation of the partition wall structure is enhanced, the filling layer can be filled with functional materials such as thermal insulation materials and sound insulation materials, so that the partition wall structure has functions such as thermal insulation and sound insulation, and the setting of the fireproof layer makes the partition wall structure have fireproof and flame retardant functions.

The invention provides an observatory site positioning construction platform which comprises a plurality of fixing mechanisms, the fixing mechanisms are fixedly installed on the surface of a dome foundation, and a plurality of supporting rollers used for supporting a chassis are installed on the surface of the dome foundation; a positioning mechanism used for adjusting the positions of the chassis and the spherical framework is installed on the surface of the fixing mechanism, and a driving mechanism used for controlling the sliding rod to stretch out and draw back is installed on the side wall of the fixing mechanism. A one-way valve for controlling the movement direction of hydraulic oil is installed in the driving mechanism, and an adjusting mechanism for adjusting the movement resistance of the sliding rod is installed in the driving mechanism. The observatory site positioning construction platform has the advantages that the positions of the chassis and the spherical framework are convenient to adjust, and the hoisting efficiency is improved.

The present specification provides a landscape generation system. The system includes M landscape generation modules, each of which includes N telescopic units and a control module, wherein each telescopic unit includes a landscaping part and a driving mechanism, the driving mechanism is mechanically connected to the landscaping part and the base frame, and is configured to drive the landscaping part to move along the target direction within a preset interval during operation and to stop and lock the landscaping part at any position in the preset interval; the control module is configured to execute and receive a first instruction during operation, the first instruction corresponds to a preset landscape, and drive multiple driving mechanisms in the M landscape generation modules to operate based on the first instruction, so as to move the M×N landscaping parts to their respective target positions, thereby generating a preset landscape. The control module controls the M×N landscaping parts to generate a preset landscape, thereby satisfying the user's needs for three-dimensional landscapes in different occasions and improving the user's experience in different occasions.

The utility model belongs to the technical field of building houses, and particularly relates to a landscape ship house which comprises a supporting base, a cylindrical cavity is formed in the supporting base, an elevator shaft is arranged in the cylindrical cavity, an equipment cavity is formed in the top end of the interior of the elevator shaft, and a lifting device is arranged in the equipment cavity. The output end of the lifting device is connected with the upper end of the lifting elevator, and the lifting elevator is arranged in the elevator shaft in a lifting mode. According to the cabin and the decorative tree, the atmosphere of forests and oceans can be felt at the same time, the quality of the dining environment is improved, the unique experience close to the nature is provided for customers, and the cabin and the decorative tree are helpful to relax the body and mind and enjoy quiet.

The present invention discloses an elevated station structure combined with bridge and construction, wherein a common pier is provided at the interface between the station end and the interval bridge, and common piers are provided at both ends of the station, and a sliding support structure is provided on the top of the common pier for connecting the station prestressed cap beam and the interval bridge; the sliding support of the sliding support structure is used to release the longitudinal constraint along the station and limit the lateral displacement constraint along the station; a track platform and a building platform are provided on the prestressed cap beam, a first reinforced concrete beam is provided on the track platform, and the first reinforced concrete beam is used to install the track, and a second reinforced concrete beam is provided on the building platform, and the second reinforced concrete beam is used to support the platform building. The present invention also discloses a construction method that is compatible with the station structure. The present invention discloses an elevated station structure system combined with "bridge and construction", wherein the station structure system does not have a temperature expansion joint, and solves the temperature stress caused by concrete shrinkage and creep during the construction phase due to the excessive length of the station.

The utility model belongs to the technical field of viewing decks, and particularly relates to a large-cantilever viewing deck which is formed by continuously welding a plurality of steel box girders. The steel box girder comprises a bottom plate, a side plate is welded to the upper end of the bottom plate, a top plate is welded to the upper end of the side plate, a rear plate is fixedly welded to the rear ends of the top plate and the side plate, and a partition plate is welded to the bottom plate. Through the internal structural design of the steel box girders, the large-cantilever viewing platform has high strength and rigidity, the structural strength and safety of the large-cantilever viewing platform are ensured, and due to the fact that the steel box girders can be transported section by section, the transportation difficulty is reduced.