49results about How to "Avoid construction difficulty" patented technology

The invention relates to a guiding-beam-free integral thrusting construction method of a network tied arch bridge. The method is characterized in that the following structure and method are adopted for thrusting the network tied arch bridge: a vertical jack is arranged at the front end in the thrusting direction of a steel box tie beam; a sliding mechanism which can ensure a piston of the jack toslide on the top surfaces of temporary piers is arranged on the top surfaces of the temporary piers; during thrusting, when the front end of the arch bridge is close to the temporary piers, the piston of the jack moves downwards to push against the sliding mechanism and the height of the front end of the arch bridge relative to the top surfaces of the temporary piers is adjusted by controlling the extension elongation of the piston to ensure chutes at the bottom of the steel box tie beam to fall on pulleys; and the chutes are supported by the pulleys and slide relative to the pulleys along with thrusting movement of the arch bridge. The method has the following beneficial effects: in the thrusting process, a main arch ring, inclined hangers, the steel box tie beam, the temporary supports and the like are integrally thrust, thus giving play to the function of partial inclined hangers to enhance the structural rigidity in the thrusting process, simultaneously avoiding installation inconvenience and construction difficulty after the members are thrust in place and improving the thrusting construction efficiency.

The invention discloses an artificial ecological barrier reef and relates to an artificial building block suitable for growth of marine organisms. According to the artificial ecological barrier reef, a body is a concrete building block with a vertical penetrating hole, a steel bar or other metal reinforced bars do not exist in the body, micro silicon powder is mixed in the body, the body is a big-end-down table-shaped object, a plurality of holes which penetrate to the vertical penetrating hole and a plurality of concave pits are formed in the side face of the body, fragments of one or more of the organic substances of plants, shells, oyster shells and organism skeletons are added into the body, and parts of the organic substance fragments are exposed on the surface of the body. Cost, conveying, island conditions and bank protection can be integrated, and the requirement for ecological environment protection can be met.

The invention relates to a high-altitude large-cantilever concrete structure structural steel supporting platform. The high-altitude large-cantilever concrete structure structural steel supporting platform comprises a multi-truss structural steel triangular supporting bracket, a box iron horizontal connecting beam and a plurality of box iron horizontal purlines. The multi-truss structural steel triangular supporting bracket comprises a main beam, a horizontal rod, a vertical rod, a first inclined supporting rod and a second inclined supporting rod. The main beam is installed on a boundary beam of a frame structure on the next layer of a cantilever structure needing to be constructed, the first inclined supporting rod and the second inclined supporting rod are installed on a boundary beam of a frame structure on the next second layer and a boundary beam of a frame structure on the next third layer of the cantilever structure needing to be constructed respectively, the horizontal rod is connected with the first inclined supporting rod and the second inclined supporting rod, the joint of the second inclined supporting rod and the horizontal rod is connected with one end of the vertical rod, the other end of the vertical rod is connected with the main beam, the box iron horizontal purlines are welded to the upper surface of the main beam in a laying mode and are used for erecting a formwork support and an external scaffold, and multi-truss structural steel triangular supporting brackets are connected through box iron horizontal connecting beams in a welding mode. The high-altitude large-cantilever concrete structure structural steel supporting platform solves the problem that the construction difficulty of an ultrahigh and large-cantilever structure with large component loads is high.

The invention relates to a pile-embedding method for a hollow pile. The pile-embedding method comprises the following steps of: hoisting the hollow pile to a pile-embedding position and hanging the hollow pile vertical to the ground; penetrating a central through hole of the hollow pile from top to bottom by using an auger drill with a reamer bit to reach the ground and starting to drill and carry soil; after the reamer bit is extended to the underground, carrying soil and expanding the reamer bit at the same time; along with the deep penetration of the drilling and soil-carrying operation, conveying the soil by using the auger drill; and embedding the hollow pile into the drill hole gradually until the hollow pile reaches to the set depth. The invention also provides the auger drill for implementing the pile-embedding method. Due to the construction by the auger drilling, soil-carrying and pile-embedding method, the problems of difficult soil extrusion in the pile-embedding process and difficult pile-embedding operation on hard-soil foundation can be solved; the project schedule is accelerated; the quality of the pile body is guaranteed; and adverse influence of construction on the ambient environment is reduced to a maximum degree.

The invention relates to an offshore drilled absorbing pile and the construction method thereof. When a drilling bit (11) breaks the ground and is drilled, an immersed tube is drilled into a high pressure water pump (18) on the main machine of a drilling machine, and supplies high pressure water for the lower part of the drilling bit through the central tube of a drilling rod to form high pressure slurry, and the slurry is discharged out of the drilled absorbing pile through a one-way valve (7) installed on a baffle plate and a slurry discharging tube (9) connected with the one-way valve. The drilling bit is drilled and breaks the ground from the upper part of the sealed bin of the drilled absorbing pile to the bottom of the drilled absorbing pile to clean all the soil plugs in the sealed bin out of the drilled absorbing pile, the drilling bit is stopped, and simultaneously the high pressure water pump (18) stops supplying water. A submersible sewage pump on the drilling machine is started up, the one-way valve (7) on the cone shaped baffle plate is closed to ensure that a sealed space is formed at the lower part, the sea water is discharged from the sealed space through the submersible sewage pump (19) to form negative pressure, the drilled absorbing pile is immersed into the sea bed under the sea water pressure, the drilling bit is supported on the mud surface and keeps still when the drilled absorbing pile is immersed, the cone shaped baffle plate of the drilled absorbing pile is lowered to the drilling bit position along the drilling rod (10) to stop the water discharging of the submersible sewage pump, and thus the primary drilling of the drilled absorbing pile is completed. The former operations are repeated to ensure the drilled absorbing pile to enter into the sea bed in a step-by-step immersed tube drilling way, in order to complete the driving-in construction of the drilled absorbing pile.

The invention discloses a assembly type joint of a round-inside and square-outside compound steel structure type column. The assembly type joint comprise a first joint connector and a second joint connector, the first joint connector comprises a first cross-shaped connecting panel which is connected with the lower end part of an upper side inner round steel pipe and a first sleeve connector whichis connected with the inner wall of the lower end part of an upper side outer square steel pipe, the second joint connector is consistent with the first joint connector in structure, and a first channel steel connector and a second channel steel connector are further included. Through reasonable arrangement of part structures, field welding and concrete operation are reduced, the construction quality is guaranteed, the construction speed is increased, and meanwhile the construction cost is saved; by the adoption of the assembly type splicing joint for the round-inside and square-outside hollowinterlayer type compound concrete-filled steel tubular column and the connecting method, assembly construction of a compound concrete-filled steel tubular structure can be achieved, and the buildingindustrialization process is accelerated; and meanwhile, a user does not need to manually carry out position selection and parameter setting on a connecting part, and then the column splicing joint required in design software can be automatically generated.

The invention discloses a device for shield plane sliding stepping in a narrow space. The device comprises an arc-shaped guide table and a guide rail, and further comprises a force transmission mechanism connected with thrust cylinders on a shield main machine and an auxiliary force transmission mechanism positioned on the shield main machine and used for pulling the force transmission mechanism,wherein the force transmission mechanism comprises a plurality of force transmission blocks connected with one ends of the thrust cylinders, a cross beam connected with the force transmission blocks and counter-force supports positioned on one side of the cross beam; and the bottoms of the counter-force supports are connected with the arc-shaped guide table, and the number of the counter-force supports is equal to that of the thrust cylinders. The device is simple and practical, existing resources such as standard block segments are utilized, the steel structure arc-shaped guide table does notneed to be independently machined, and cost is saved; plane sliding is achieved in the small space, the section size of a sliding channel does not need to be increased, and the safety risk of a shallow buried section tunnel is reduced; and a supporting stress structure adopts the H-shaped steel cross beam to increase the supporting stress area, the cross beam and the counter-force supports transmit force in a balanced and symmetrical mode, operation is easy and convenient, and use is safe.

The invention discloses a construction method for decomposing a grading high-rise pile cap. A pipe (1) based on a decomposer is constructed up to the ground elevation of a bearing platform at a time. The bearing platform (2) of the pile foundation is constructed in advance before secondary backfill is made, and then back fill (3) under the ground elevation of field plating is treated. The method has simple configuration, low cost, easy implementation, can solve greatly construction difficulty when being applied to aluminium industry fractional decomposition, shortens duration of a project, and reduces the investment.

The invention mainly relates to the technical field of construction and discloses a weather-proof modified asphalt. The weather-proof modified asphalt is prepared from the following raw materials: 95-100 parts of matrix asphalt, 2.2-2.4 parts of water, 2.1-2.3 parts of nanometer titanium dioxide, 1.7-1.9 parts of SBS asphalt modifier, 1.1-1.3 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 0.3-0.5 part of asphalt stabilizer and 0.5-0.7 part of graphene. The weather-proof modified asphalt provided by the invention has the advantages of extensive source of raw materials, simple preparation, low cost, high weather fastness, ageing delaying effect, high fatigue damage resistance and anti-rutting performance under high-temperature and rainy conditions, capability of avoiding embrittlement and cracking under low temperature, high stability and capability of prolonging service life of road. Nanometer titanium dioxide and SBS asphalt modifier are added after matrix asphalt is heated and molten, so that fluidity and weather fastness of asphalt can be promoted and construction difficulty can be reduced.

The invention relates to an anchor rod for underground engineering anti-floating system construction and a construction method. The anchor rod comprises an anchor rod framework, wherein an anchor head with a backing plate is fixedly mounted at the top of the anchor rod framework; the anchor rod framework comprises a guide pipe; a grout pipe I is arranged inside the guide pipe; and a grout pipe II is fixedly mounted at an external part of the guide pipe. The anchor rod has the benefits as follows: a traditional support type anchor rod construction machine is adopted, so that the defects that the construction difficulty is high and the efficiency is low, the construction period is long, the input cost is high, both excavation and structure construction processes cannot be effectively joined due to slow progress of a traditional process when an anti-floating pile is constructed in high-strength hard rock are overcome; and the fast progress and good quality are realized, and greater economic benefits are brought to enterprises.

The invention discloses a construction method for an underwater deeply-buried structure. The technological process comprises the step I of selecting proper underwater excavation equipment that can reach in waters according to the project geological exploration data; the step 2 of resurveying an underwater terrain, and designing a proper underwater excavation method and an excavation step-slope form according to design drawings and geological and hydrological data; the step 3 of performing surveying and setting out over water, and installing excavation monitoring equipment on the excavation equipment; the step 4 of performing underwater stepped excavation, and implementing necessary construction of an auxiliary construction platform after completion of excavation; the step 5 of constructingsinking cofferdam, and regulating implantation to a design attitude; the step 6 of pouring sandwich concrete and bottoming concrete of the cofferdam, and finishing cofferdam construction; and the step 7 of pumping water for dry construction of an underwater structure. According to the construction method, underwater excavation is implemented firstly, and then a water-surrounding auxiliary structure is constructed, so that dry construction environment of the structure is ensured; and the underwater construction problem of the deeply-buried structure below a complex geological riverbed can be solved in a high-quality mode quickly, efficiently and safely.

The invention discloses a blast furnace slag replacement method for high-fill steel slag foundation, which comprises the following steps of: superimposing a first blast furnace slag cushion layer (1), a graded gravel cushion layer (2) and a second blast furnace slag cushion layer (3) sequentially from bottom to top in a steel slag foundation pit, respectively compacting the first blast furnace slag cushion layer, the graded gravel cushion layer and the second blast furnace slag cushion layer, setting up a through groove around the first blast furnace slag cushion layer, the graded gravel cushion layer and the second blast furnace slag cushion layer, and filling blast furnace slag into the groove. By adopting the blast furnace slag replacement method, the problem of thermal expansion of the high-fill steel slag foundation can be solved. The invention has the advantages that the method can be easily mastered and has practicality, the quality requirements can be satisfied, the construction period can be shortened, and the construction cost can be reduced. Therefore, the method has good promotion prospects.

The invention discloses a fire early warning method based on the logarithmic inverse time limit principle, and the method comprises the steps: collecting the load current of an operation line through the environment operation state and the parameters of a power supply cable; the real-time temperature rise of the current power supply cable is estimated, the current cable temperature is estimated according to the environment temperature, and when the temperature is higher than the safe operation level, a fire early warning prompt is given; and performing a thermal accumulation process on the real-time load current by applying a logarithmic discretization inverse time limit algorithm, tripping and starting a thermal reset timing process when the running limit of cable heating is reached, and forbidding the line to be switched on and put into operation before thermal reset zero clearing in the thermal accumulation process. According to the method, the temperature and the heat accumulation time of the running line cable can be quickly estimated and judged without depending on an external cable temperature sensor, the running safety of the power cable is guaranteed, fire accidents caused by cable overheating are avoided, and the life and property safety of people is guaranteed.

A rubber cast iron sleeper plate type vibration reduction system comprises a steel rail, a fastener, a fastener base plate, a sleeper and a ballast bed. The sleeper is a cast iron sleeper, and the fastener base plate and the cast iron sleeper are integrally formed. Rubber vibration reduction pads are symmetrically arranged on the bottom surface of the sleeper, and the sleeper is provided with a rubber sheath which wraps the bottoms of the rubber vibration reduction pads and extends upwards to wrap the side surface of the sleeper. The ballast bed is arranged below the rubber sheath; the ballastbed is composed of a self-compacting mortar cushion layer or a common reinforced concrete cushion layer; and the self-compacting mortar cushion layer or the common reinforced concrete cushion layer is filled below the rubber sheath and around the side surface of the rubber sheath. Under a condition of the same mass, a volume of the vibration mass can be greatly reduced so that a purpose of greatly reducing a height of a track structure is achieved.