528results about How to "Solve construction problems" patented technology

The invention discloses a steel trussed beam and flexible arch construction method with vault pushing, which comprises the following steps of: building an assembly support in the side span of a steel trussed beam, assembling a guide beam and the steel trussed beam into an integral space on the assembly support, arranging a horizontal continuous jack and a mechanical, electrical and hydraulic control system on the assembly support, pushing the steel trussed beam forward by using the horizontal jack, and continuing next round of assembly work on the rear assembly support whenever one round is pushed forward. By using the steel trussed beam and flexible arch construction method with vault pushing provided by the invention, the steel trussed beam and the flexible arch are erected outside the operating limit of a highway, and the construction difficult across the highway is solved.

The invention discloses a water-rich weak surrounding rock long-and-big tunnel construction method. The method includes that a tunnel inclined shaft is arranged on one side of a main tunnel of a tunnel to be constructed, the main tunnel is divided into a tunnel entry section, a tunnel exit section and a middle connecting section connected between the tunnel entry section and the tunnel exit section, the middle connecting section is divided into an inclined shaft assisting construction entry section and an inclined shaft assisting construction exit section, and each of the tunnel entry section, the tunnel exit section, the inclined shaft assisting construction entry section and the inclined shaft assisting construction exit section is divided into multiple sections for construction. A construction method of each section includes: step 1, performing geological forecasting in advance, and when a debris flow formation exists ahead, entering a step 2, or else, entering a step 3; step 2, performing stability control construction; step 3, determining a primary supporting scheme; step 4, excavating the tunnel, and performing primary supporting construction; step 5, performing secondary lining construction on the tunnel. The water-rich weak surrounding rock long-big tunnel construction method is simple in step, reasonable in design, simple and convenient to construct, good in using effect, capable of meeting construction requirements of water-rich weak surrounding rock long-and-big tunnels, short in construction period and safe in construction process.

The invention relates to a reinforced concrete square post prefabricated by low temperature and terrestrial heat. It embeds post heat exchangers in variable shapes into the prefabricated reinforced concrete square post to support, baffle sand and reinforce the groundsill; processes the lower-layer lower temperature terrestrial heat exchanger to directly embed the post heat exchanger with pile and heat pump. It binds U-shape pipe heat exchanger, screw coiler heat exchanger or the pipe heat exchanger in other shape on the inner edge of prefabricated reinforced concrete square post with welding method or flange method to be embedded into sand; the pipe heat exchangers inside the prefabricated reinforced concrete square post are connected to the ground pipeline while the pipeline of heat exchanger is filled by fluid via which the heat exchange between steel cage, post concrete and around sand-water system can be processed to form a closed underground low-temperature terrestrial heat exchange.

The invention discloses a horizontal seam U-shaped closed rib junction structure of an assembled shear wall structure, comprising an upper-layer outer wall prefabricated shear wallboard (1), a lower-layer outer wall prefabricated shear wallboard (2), an upper-layer inner wall prefabricated shear wallboard (16), a lower-layer inner wall prefabricated shear wallboard (17), U-shaped closed ribs (5), a horizontal reinforcing rib (6) and filled cast-in-place concrete (13), wherein the U-shaped closed ribs adopting the upper-layer outer wall prefabricated shear wallboard, the lower-layer outer wall prefabricated shear wallboard, the upper-layer inner wall prefabricated shear wallboard and the lower-layer inner wall prefabricated shear wallboard are staggered and are in lap joint to form an annular ring; the horizontal reinforcing rib is arranged in the annular ring to reliably connect the vertical reinforcing steel bars of the assembled shear wall; and the filled cast-in-place concrete of a horizontal seam (7) realizes the purpose that the resistance to shear of the horizontal seam is equivalent to the cast-in-place concrete shear wall. The whole prefabricated assembled shear wall can be reliably connected with the shear wall and a floorslab, the whole prefabricated assembled shear wall performance can be ensured, and the horizontal seam U-shaped closed rib junction structure has the advantages of simple form and material conservation and is convenient to construct.

The invention relates to a roller type cutter rectangular pipe jacking machine, which comprises a cutter, a cutter driving system, a spiral mechanical unearthing system, a hydraulic propulsion system and a rectangular shell. The cutter adopts a composite formation roller type cutter, is sleeved on the cutter driving system and is driven by the cutter driving system to rotate, the composite formation roller type cutter comprises a plurality of ordinary tools, a swinging tool and an over-excavation tool, a cutter shell adopts a round tubular component, the inner wall of the cutter shell is provided with a separating wall vertical to the axial line of the cutter shell, the ordinary tools are uniformly and fixedly arranged on the outer wall of the cutter shell, the swinging tool is hinged on the inner side of the outer wall of the cutter shell through a pin shaft and can rotate around the pin shaft, and the over-excavation tool is fixedly arranged on the outer side of the outer wall of the cutter shell. The invention has the advantages of high adaptability to formations and high tunneling efficiency. Meanwhile, construction risks can be reduced greatly, construction safety can be ensured, and the machine can adapt to construction of slightly weathered rock formations, composite formations, backfilled formations, continuous walls through the ground, pile foundations and other complex formations and working conditions.

The invention discloses a caisson and pile combined foundation of consolidated subsoil and a construction method of the caisson and pile combined foundation. The caisson and pile combined foundation of the consolidated subsoil comprises the consolidated subsoil, a sand-gravel cushion, a caisson, bored piles, pile bottom grout, top seal concrete and scour protection. The main construction method comprises the following steps: consolidating the foundation with an underwater compaction sand pile or a deep-layer cement mixing pile; laying the sand-gravel cushion on the consolidated subsoil; sinking the caisson with a skirt, pile sinking guide holes and grouting reserved pipes on the sand-gravel cushion; after the caisson is located, constructing bored piles through the pile sinking guide holes; after construction of the bored piles, casting the top seal concrete at the bottom in the caisson; grouting the bottom of the caisson through the grouting reserved pipes at the bottom of the caisson, carrying out pile bottom grouting through grouting pipes in the pile, and at last casting the top plate of the caisson. In the construction process, the scour protection shall be performed around the caisson according to requirements. The caisson and pile combined foundation of the consolidated subsoil and the construction method of the caisson and pile combined foundation, disclosed by the invention, can effectively improve vertical and horizontal bearing capacity of the caisson, and control sedimentation and horizontal displacement of the caisson.

The invention belongs to the field of construction of steel structure trusses, and particularly relate to a construction method of large-scale parallel flexible lower-cord combined trusses. The construction method comprises the following steps: (1) assembling upper-cord layers of trusses by sections, and abutting overhead, wherein the trusses need to be arched in advance according to the deformation design in the process of assembling; (2) installing lower-cord web members and lower-cord panel points independently after finishing assembling the trusses of the upper layer; (3) measuring the actual installation spacial distances among the lower-cord panel points, and determining the initial installation geometrical lengths of flexible lower cords; (4) installing all flexible steel pull rods connected in parallel among all spans of the lower cords, and then pretightening the steel pull rods of the lower cords uniformly; and (5) grading synchronously and unloading equally proportionally by using a support frame. By adopting the construction method provided by the invention, the construction difficulty of tensioning the internal force of the lower cords of the ultralarge-scale parallel flexible trusses initiatively can be solved. The construction method has the advantages of high construction efficiency and good economic benefit.

The invention provides a construction method for excavating an upper drift heading and a lower drift heading in the two side walls of an ultra-large subsurface tunnel and belongs to the technical field of construction engineering. The method comprises the steps of drilling and blasting scheme design; construction requirements meeting of drilling and blasting design; blasting parameter selection; surveying and setting out; excavation of the upper pilot tunnel portion and the lower pilot tunnel portion of the two side walls; removal of reserved rock beam portions; excavation of an annular core soil portion of an arch portion; and excavation of core soil middle-upper steps, middle-lower steps and lower steps. Compared with a traditional two-side-wall drift heading method, according to the method, the way of excavating the upper drift heading and the lower drift heading at the same time is adopted, and the characteristics of the large-section tunnel can be fully utilized; a working face which can be excavated is increased; tunnel excavation conducted at the early stage is accelerated; and the construction period is effectively shortened. According to the method, reserved rock beams are utilized, so that horizontal support strength and global stability are effectively enhanced; horizontal convergence deformation and arch top settlement of the tunnel are decreased; and safety of buildings on the upper portion of the tunnel is guaranteed. According to the construction method, after the high side walls are constructed by means of the bottom of a lower pilot tunnel of the tunnel, backfilling is conducted, the height of a second lining construction section of the tunnel is reduced, and the construction problem of an ultra-large-section formwork trolley is solved.

The invention discloses a door-type self-adaptive telescopic hydraulic climbing platform system and a climbing method thereof. The platform system comprises a top frame platform, two vertical frame bodies and a plurality of climbing mechanical systems; the two vertical frame bodies are oppositely arranged on the inner wall of a wall body of a core cylinder through the at least two climbing mechanical systems correspondingly; the upper ends of the two vertical frame bodies are connected with the two ends of the top frame platform correspondingly to form a door-type frame body; each climbing mechanical system comprises a plurality of wall-attached devices, load-bearing hooks and mechanical climbing devices; the load-bearing hooks are connected with the vertical frame bodies and the mechanical climbing devices correspondingly; and the door-type self-adaptive telescopic hydraulic climbing platform system further comprises an adjusting mechanism which can make the climbing mechanical systems to be capable of climbing at the position where spaces of the inner wall of the wall body of the core cylinder are changed by adjusting the horizontal position of the load-bearing hooks. According to the door-type self-adaptive telescopic hydraulic climbing platform system and the climbing method thereof, the concrete core cylinder inner construction problem that an existing hydraulic climbing platform cannot be used for contraction of the wall body to which a machine position is attached can be solved.

The invention discloses a method for estimating a 20-kilovolt medium-voltage distribution scheme, which belongs to the technical field of the application of electric industry. In the method, an estimation index system of the 20-kilovolt distribution scheme is established by an analytic hierarchy process (AHP), and a data envelopment analysis (DEA) estimation model with an AHP preference cone is improved, wherein the provided AHP/DEA model is used for solving the weight of an index. By the method, the problem that 9 comparison objects cannot be exceeded in the conventional method is solved and the problem of combining subjectivity and objectivity reasonably in estimation by introducing a relaxation factor is also solved properly.

The invention belongs to the technical field of measurement in nuke industry, and in particular relates to a high-energy pipeline local leakage monitoring test bed for a nuclear power station. A structure of the high-energy pipeline local leakage monitoring test bed comprises a high-energy medium generation device, wherein the high-energy medium generation device is connected with a testing pipeline through a technological pipeline, the testing pipeline is connected with a leakage rate measurement pipeline, the testing pipeline comprises a testing straight pipeline and a crack simulation test piece, the technological pipeline comprises a main technological pipeline and a temperature and humidity steam testing pipeline as a branch pipeline, the testing straight pipeline is connected with the main technological pipeline, the temperature and humidity steam testing pipeline respectively extends to the crack simulation test piece and the leakage rate measurement pipeline respectively, a plurality of waveguide rods are arranged on the testing straight pipeline, acoustic emission sensors are arranged on the waveguide rods and are connected with signal acquisition cards through cables. The test bed provided by the invention can be used for finishing leakage simulation tests of high-energy pipelines, as well as research and development, demarcating and overhaul of acoustic emission leakage monitoring systems and temperature and humidity leakage monitoring systems.

The invention discloses a power grid three-dimensional design result data management system and a digital management method thereof. The system comprises a three-dimensional design result data management device, an interface conversion device connected with the data management device, and an owner terminal connected with the interface conversion device. The data management device is used for recording the power grid three-dimensional design result; the interface conversion device is used for establishing a conversion relation, and is further used for handing over the conversion relation and the power grid three-dimensional design result to the owner terminal in a digital seamless way; and the owner terminal reads and stores the three-dimensional design result in a local disk file according to the conversion relation. The power grid three-dimensional design result data management system and the digital management method thereof are provided in the invention, the whole set of technical scheme fills the technology gap in the field of power grid three-dimensional design result data management, the actual state that the power grid three-dimensional design result is disjointed with construction, operation, management and monitoring is radically solved, and technical merit and work efficiency in design, building and management of the power grid are both improved.

The invention relates to a support construction method of a steel bracket template of a concrete crossbeam in a structure transition layer, which pertains to the technical filed of building construction methods. The method comprises the following steps: an embedded part of a joist supporting bracket is embedded; concrete of a column in the transition layer is poured; after the strength of the concrete of the column in the transition layer reaches more than C20, a column die in the transition layer is disassembled; a steel corbel, a shaped steel joist, a diagonal bracing shaped steel and a connecting shaped steel are arranged; a beam bottom formwork of the transition layer is laid; a preloading test is carried out to a steel joist of the beam of the transition layer; steel bars of the beam of the transition layer are bonded, and the erection of a template of a side beam form of the transition layer and a floor formwork is carried out; and concrete is poured onto the beam of the transition layer and a floor. A shaped steel-combined steel frame is adopted in the method, and the reinforced concrete column after pouring is used for supporting and bearing to form a combined bearing frame of the steel frame and the concrete column, thereby solving the construction difficulties of the formwork body with relatively high risk of the ultra high and overloaded crossbeam, ensuring the safe production of the construction process, solving the load bearing problem of the support frame by utilizing the frame column and guaranteeing construction quality. The method has the advantages of convenient construction and short construction period.

The invention discloses a prestressed concrete variable cross-section fish-bellied type continuous box girder construction method. According to the method, a formwork assembly part, steel bar binding and preserved hole setting part and box girder bottom plate and web plate concrete casting part in the existing prestressed concrete variable cross-section fish-bellied type continuous box girder construction method are improved. The construction difficulty is reduced, so that the construction of a prestressed concrete variable cross-section fish-bellied type continuous box girder becomes simple; the operation is simple.

The invention relates to a method for intersection angle high-speed railway underpassing low-clearance girder erection, and solves the problems that in the interchange engineering, when the clearance to the bottom of the girder of the high-speed railway is small, a bridge girder erection machine cannot use the normal construction method to perform the girder erection. In the method, the bridge girder erection machine, carrying pole cross beams, girder transfer tracks, and a girder transfer trolley are effectively combined, the on-site owned conditions are completely utilized, so that the low clearance limit is avoided; and auxiliary facilities are arranged, so that beams are orderly fed in sections and steps. For the box girder erection at the crossings of the highway and railway, the bridge girder erection machine overhead crane is adopted on one end, a construction scheme of hanging chain blocks on the special carrying pole cross beams are adopted on the other end, so that the construction problem of low-clearance small box girder erection can be well solved.

The invention relates to a manufacturing method of a rubber and chemical fiber synthetic waterproof sheet and a product thereof, and the rubber and chemical fiber synthetic waterproof sheet is formed by compounding three layers of material, wherein the middle layer is a chemical fiber cloth or felt composite layer, and the chemical fiber cloth or felt composite layer is a waterproof layer enabling polymer synthetic rubber composite material and chemical fiber cloth or felt to infiltrate and adhere mutually; when in manufacturing, the chemical fiber cloth or felt of the middle layer is firstlyplaced in a dip coating groove for enabling the chemical fiber cloth or felt to soak polymer synthetic rubber waterproof rubber material, and the middle sheet layer is further manufactured; and two layers of the chemical fiber cloth or felt are stuck on two surfaces of the middle sheet layer respectively, thereby forming the three-layer compound synthetic waterproof sheet. The polymer synthetic rubber waterproof rubber material takes rubber as main material, and a high polymer and other auxiliary materials are added for manufacturing the waterproof rubber material; the auxiliary materials comprise an accelerant, filling material, a softener, a cross-linking agent or an anti-aging agent; and the middle sheet layer can be manufactured by one of three forms respectively, namely the cold working method, the hot working method and the rolling method.

The invention discloses a large-span section assembling bridge manufacturing machine and an assembling construction process thereof. The bridge manufacturing machine comprises a bridge manufacturing machine main body structure, a crown block system and a forward moving system, wherein the bridge manufacturing machine main body structure comprises a left main truss, a right main truss, an upper lateral brace and a lower lateral brace; the two main trusses comprise a main beam and a guide beam, and the guide beam has a three-layer step type truss structure; and a plurality of connecting rods comprise 87 type military beams and heterogenic rods. The assembling construction process comprises the following steps of: 1. assembling and constructing a first hole beam of a single-hole beam or a porous beam; forwards shifting the bridge manufacturing machine main body structure to construct the next hole beam across the hole; and repeatedly constructing till the integral construction of a constructed bridge is finished and the bridge manufacturing machine main body structure is disassembled. The bridge manufacturing machine has reasonable structural design, large span, convenient processing, manufacture, assembly and installation, strong weight capacity and low investment cost; and the used assembling construction process is simple, is convenient for realization and can be effectively suitable for the assembling construction process of bridge sections with the span of 64m and below 64m.

The invention discloses a tower crane foundation in a building basement and a manufacturing method of the tower crane foundation. The tower crane foundation is manufactured into an orthogonal beam slab type reinforced concrete tower crane foundation composed of an orthogonal beam and a slab. During manufacture, a pit of the tower crane foundation is dug in the building basement, and then the orthogonal beam is poured in a traditional mode of pouring reinforced concrete and the slab is poured on the orthogonal beam, and meanwhile, at least one circle of water retaining boards is fixedly inlaid around the slab; base plate surface ribs of basement base plates are embedded according to a traditional mode of pouring the basement base plates, and then the basement base plates are poured; and after the basement base plates are poured, the water retaining boards are inserted into the basement base plates around the slab, so that the orthogonal beam slab type reinforced concrete tower crane foundation is connected with the basement base plates into one. The tower crane foundation has the advantages of fastness, convenience and high efficiency in construction, low construction and operation cost, reliability in performance, safety in operation, convenience in operation and the like.

Disclosed is an ultrahigh large-span concrete cast-in-place beam bailey truss framework construction method. The measures such as erecting lattice columns and bailey trusses are adopted. The method comprises the steps of arranging a lattice column foundation, erecting the lattice columns, mounting cross bridgings among the columns, installing a top movable head, erecting cover beams, erecting the bailey trusses, installing distributive beams, mounting a side protective barrier, laying a keel, laying templates and the like. A simple framework supporting system which is small in occupied site, solid and reliable and convenient to install and disassemble is formed, a great deal of conventional steel tube floor scaffold material input is avoided, and at the same time, the labor intensity of workers is also reduced. The ultrahigh large-span concrete cast-in-place bailey truss framework construction method can adapt to ultrahigh large-span concrete cast-in-place beam projects in various building constructions.