414results about How to "Guaranteed duration" patented technology

The invention discloses a self-propelled inverted arch template construction method for a tunnel, which comprises the following construction steps of: setting out a control line for an inverted arch digging section and a longitudinal construction joint according to the design requirement; performing smooth-wall blasting digging on an inverted arch of the tunnel; moving an inverted arch trestle in place; conveying inverted arch stone slag out of the tunnel by using an excavator and a conveying device and abandoning the stone slag in a slag field, and cleaning an inverted arch base; assembling an inverted arch end template; laying steel rails, and moving the inverted arch template to longitudinally move in place per se; starting a hydraulic device to lower the inverted arch template, and supporting the template firmly by using a screw jack; pouring inverted arch concrete; and curing the concrete with equal strength, folding the screw jack, withdrawing a hydraulic cylinder, and releasing a die. The construction method has low cost, is convenient to operate, and improves the construction efficiency; and the longitudinal construction joint is vibrated densely compared with common template construction, and has positive effect of improving the construction quality of tunnel engineering.

The invention discloses a construction method that a composite soil pressure balanced shield machine passes through a shallow sand layer rich in water, pertaining to the technical field of tunnel construction. When the composite soil pressure balanced shield machine passes through the shallow sand layer rich in water, an injecting system is arranged at the position of a pressure plate and a cutter head of the shield machine so as to inject a matter-a foaming agent, or bentonite, or a macromoleclar polymer, or the mixture of the three, which has the performances of rapid volume expansion and viscosity increase after absorbing water, into the front shallow sand layer rich in water; the shallow sand layer rich in water is rapidly expanded, soil entering an integral pressure cabin is caused to form plastic flow state, and the soil is caused to reach the permeability coefficient of lower than the magnitude of 10<-5>cm/s which is needed by the construction and the caving degree of 10 to 15cm. The technical proposal is scientific and reasonable, simple and easy to implement, can acquire obvious technique effect, adopts the composite soil pressure balanced shield machine for passing through the shallow sand layer rich in water successfully and acquires satisfactory construction quality as well as guarantees the construction period.

The invention relates to a construction process and equipment for a downhole impacting high-pressure jet grouting pile. An impactor is used for generating certain vibration impact effect in an impacting and sinking process, the impactor is driven by high-pressure air, and damage effect is produced to a soil body structure by virtue of vibration and high-pressure air; meanwhile, auxiliary soil body cutting effect of a high-pressure water jet is utilized at the upper part of the impactor; cutting damage to soil body by high-pressure water, gas and vibration is used for providing conditions for subsequent concrete spraying, under high frequency vibration of a downhole impactor, high-pressure water, high-pressure gas and high frequency vibration generate a linkage mechanism to rapidly soften the soil body at the periphery, the soil body is in a plastic flow state, after a high-pressure pump is transformed to spray high-pressure concrete, the soil in the plastic flow state is fully mixed with concrete, and a cement-soil pile with larger diameter and uniform concrete is formed. In the invention, under the high frequency vibration of the downhole impactor, the high pressure water, the high pressure gas and the high frequency vibration generate the linkage mechanism, diameter of a finished pile is larger, and strength of a pile body is higher.

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.

Disclosed is a steel beam hydraulic lifting emplacing device on the top of silo structure building, which comprises a sliding formwork device and a hydraulic lifting system, and is characterized in that the sliding formwork lifting frames of the sliding formwork device are connected with an inside formwork, an outside formwork, and an operating platform, a scissors support is connected between two lifting frame upright columns, the sliding formwork lifting frame is also connected with a steel beam supporting frame, the steel beam support frame is connected with the steel beam on the top of the silo to form a lifting integration, the hydraulic lifting system is utilized to be the lifting power system for the lifting integration, and the hydraulic lifting system is composed of a hydraulic jack, a support rod, a hydraulic console, and an oil circuit. The invention can rapidly, conveniently, reliably, and safely complete the construction task of mounting the steel beam on the top of the silo, without using large scale hoisting equipment, thereby avoiding the problems of difficult emplacement and lower efficiency of large scale hoisting equipment. The device of the invention can be widely applied to the hoisting and emplacement construction for the steel frame on the top of silo buildings.

A job practice of which center island is done in sequence and partial skirts done inversely, comprising the following steps : set up exterior-protected construction, purlin and steel upright columns around the foundation ditch; dig on basin pattern for the first time to the depths to structural plane of purlin, earthwork are unified dig beneath the designed to the surrounding medium plate in the foundation ditch, pour the surrounding medium plate; dig for the second time with basin pattern downwards from the position of foundation ditch medium plate to the bottom of the designed foundation ditch, pour the center island plate; after the center island plate meets the maintenance time request of plate, construct in sequence to close the medium plate, setting fetching holes; then use medium plate for support system, construct criss-cross structural upper plate and plates in inverse zones. This construction method is convenient, save labor force and resources, improves the progress of the project, shorten the construction period.

The invention discloses a prestressed ultrahigh-performance concrete continuous box girder bridge which comprises piers and an ultra-high performance concrete box girder. The box girder has a wholly or partially external prestressed system in the longitudinal direction of the box girder bridge and mainly comprises a top plate, a bottom plate, a web plate and a diaphragm plate, wherein at least one of the top plate, the bottom plate, the web plate and the diaphragm plate is a sheet. The construction method of the prestressed ultrahigh-performance concrete continuous box girder bridge is a segmental prefabricating and suspended-splicing method and mainly comprises the following steps: constructing pile foundations and the piers, mounting blocks No.0 on the piers, splicing all sections of the box girder symmetrically on two sides of the blocks No.0 in a suspending way, erecting side spans by using a support erecting method, carrying out side span closure, carrying out midspan closure, and stretching prestressed steel strands in all construction stages to finish construction. The prestressed ultra-high performance concrete continuous box girder bridge has the advantages of simple structure and light dead weight, the crack risk of the box girder is reduced, and the method is suitable for constructing a long-span bridge.

The invention discloses an ultra-deep T-shaped trench-wall pile in a soft-toped hard-bottomed soil layer and a trench forming method. The trench forming method includes the steps: firstly, pre-reinforcing soft soil at each external corner of a T-shaped trench wall; secondly, digging a guide wall foundation pit, treating the extremely soft soil layer at the bottom area of a guide wall to lead the bearing capacity of the foundation bottom of the guide wall to be larger than or equal to 100kPa; and thirdly using the trench forming way of 'drilling and gripping'. By the method, trench forming efficiency can be improved greatly, cost is lowered, and evident economy is achieved.

The invention discloses a self-rising deformable removable integral lifting steel platform system for ultrahigh varying-layer plane construction and the construction method thereof, comprising steel platform, plate lifter, flexible steel column, hanging staging and bearing pin, where the hanging staging is fixed with the steel platform, the steel platform is deformable and comprises primary and secondary beams, the junction of the two beams is provided with a rolling device, the secondary beam can take the primary beam as orbit to move relative to the primary through the rolling device. The invention uses the various construction columns installed in core tube sharing walls as support and climbing guide rails, uses the plate lifter as power, lifts the whole steel platform system by lifting screw rods connected with the steel platform, and arranges trolleys on partial secondary steel beams to make them able to move inward along the primary steel beam to the preset position at last, and completes the plane deformation of the steel platform and meets construction requirements for the core tube variation.

The invention discloses an overall lifting construction method of a large complex composite structure steel roof. According to the overall lifting construction method, a lifting support is arranged onthe corresponding position in a house, a composite structure roof (including a truss girder, an annular net rack, a pull rope and a roof secondary girder) is assembled in situ through the ground in the house, truss column house exterior hoisting and composite structure roof assembling are conducted synchronously, after roof system ground assembling and pull rope mounting are completed, ground initial tensioning is conducted, ten lifting power is provided for the roof through a lifting jack and a hydraulic control system, thus the composite structure steel roof is overall lifted and descended,and the lifting jack vertically moves to achieve linear adjustment of the roof truss girder, column joint butting and an overall roof system.

The invention relates to a modular metal constructing forming method. According to the method, a large forging preformed blank is divided into multistage modules to be constructed correspondingly according to concrete conditions, finally, the blank is formed, and parts or components are machined. The constructing quality of the method is more reliable and controllable, each module can be detectedafter being forged, and it is ensured that the modules are recycled after qualification; multiple pieces can be fed during feeding, the project duration can be effectively guaranteed. The method can improve the yield of large metal constructing forming, can greatly improve the production efficiency under the condition of using the same specification press, solves the bottleneck problem in the manufacturing process of large constructed formed forgings, and reduces the production cost.

A system and method are provided that preserve many of the advantages of traditional workups, including the ability to create a single deal extended in time, while avoiding aspects of prior art workup protocols that can be disadvantageous in particular trading environments and, particularly, avoiding the trading delays sometimes created by providing certain traders with exclusive trading privileges in highly-liquid, fast-moving trading environments. In a preferred embodiment, the present system comprises a distributed computer processing system programmed to provide a structured trading protocol that enhances trading efficiency and fairly distributes market opportunity to system users. More specifically, in a preferred embodiment, the present system is adapted to provide a plurality of workup phases each of which is designated a “public” phase and during which all trading is conducted on a first-come-first-served basis.

The invention provides a moveable operating platform and a method for constructing a suspended ceiling of a roof by using the same. The moveable operating platform and the method are used for constructing suspended ceiling plates of a long-span saddle-shaped roof. The moveable operating platform comprises more than one unit platform, more than one suspending piece and more than one dragging device, wherein square tubes are welded into the unit platforms; the unit platforms are successively and detachably connected into a groove-shaped construction; the suspending pieces are fixed at an upper end of the groove-shaped construction; the upper ends of the suspending pieces are suspended on a cable rope; and the dragging devices are fixed on the groove-shaped construction and are connected to purlins of a roof structure by dragging wire ropes. When the moveable operating platform provided by the invention is used for suspending and assembling the long-span saddle-shaped roof, the unit platforms can be detached following the change in roof width, thereby saving a large amount of costs of repeatedly used materials of a full frame, being economical and ensuring construction period, construction quality and safety.

The invention provides a walking type jacking construction method and device for large-span reinforced concrete combined beams. The walking type jacking construction method comprises the following steps that temporary piers are arranged between all main piers of a bridge girder; a jacking device and two bearing beams are installed on each temporary pier, wherein each jacking device is arranged between the corresponding two bearing beams; the reinforced concrete combined beams are arranged on the bearing beams of the temporary piers; the jacking devices carry out upward jacking in place and make contact with the bottoms of the reinforced concrete combined beams; the jacking devices continue to carry out upward jacking, jack the reinforced concrete combined beams and break away from the bearing beams; the jacking devices are pushed forward and drive the reinforced concrete combined beams to move forward by a set stroke; the jacking devices descend so that the reinforced concrete combined beams can be arranged on the bearing beams of the temporary piers in a supporting mode again; the jacking devices continue to descend to the initial positions and are pushed backwards to the initial positions, so that a jacking stroke is finished; the above steps are conducted repeatedly until construction of the whole bridge girder is completed. According to the walking type jacking construction method and device for the large-span reinforced concrete combined beams, manpower, material resources and financial resources are saved on the premise of guaranteeing the construction period; meanwhile, the walking type jacking construction method and device for the large-span reinforced concrete combined beams have the advantages that construction and operation are convenient, safety and reliability are realized, efficiency is high, the construction period is short, and the comprehensive cost is low.

The invention relates to the construction field of earthwork projects of sand soil or fine-grained soil foundation pits, in particular to a construction method of digging and conveying earth of a deep foundation pit through current scour. The construction method includes the step of supporting and portioning the foundation pit, the step of digging a mud sucking pool, the step of installing a mud pump, the step of installing a high-pressure water pump and a water supplying water tank, the step of digging a soil abandoning area, the step of installing a mud conveying pipe and middle pressurizing equipment and the step of digging soil through current scour, and finally the mud is conveyed to the soil abandoning area through the mud conveying pipe, the mud sediments in the soil abandoning area, and clean water after sedimentation is discharged or reused. The construction method of digging and conveying earth of the deep foundation pit through current scour has the advantages that (1) the scheme of digging and conveying soil through hydraulic power well resolves the problem of work stoppage caused by road traffic control; (2) soil is conveyed through a water current pipeline instead of a land route, so that the influence on the city road traffic from large earthwork trucks is reduced; (3) the construction scheme of digging and conveying soil through hydraulic power lowers construction noise; (4) no large earthwork truck passes near the foundation pit in the construction process, and loads on a surrounding and protective structure are reduced.

The invention provides a construction method of a widened and improved structure system for an existing station platform, which comprises the following steps: pre-processing steel members of a widened steel structure of a station; reinforcing frame columns of an original frame structure; reinforcing bent steel columns; mounting middle beams; mounting side beams; and mounting a structure widened platform. According to the invention, the steel members of the widened and improved part of the station are divided into middle beams, cantilever side beams and a steel structure widened platform to be respectively constructed, so that the processes are reasonable, the construction time is accurate, and the construction period is ensured; and the early subway station which can not meet the existing passenger flow is widened and improved, thereby summarizing construction experience for a new trend of the future subway industry, filling up the blank of the track traffic industry and providing reference for future improved construction.

The invention discloses a steel reinforced concrete column type joint and a construction method of an underground diaphragm wall using the same. The joint comprises a II-shaped section steel (1) and two later-stage groove-section reinforcing cages (3). The construction method mainly comprises the following steps of: (1) construction of the steel reinforced concrete column type joint; (2) construction of the groove section; and (3) reinforcement of a high-pressure rotary spraying pile at the joint. Through the steel reinforced concrete column type joint disclosed by the invention, the overall rigidity and anti-permeation performance of the groove-section connection structure of the underground diaphragm wall are enhanced; through the construction method of the underground diaphragm wall using the same, disclosed by the invention, the construction of the steel reinforced concrete column type joint and the construction of the groove section can be performed in a streamline manner, and the construction efficiency is improved; and moreover, the construction can be all performed according to a closed wall, and the length of the reinforcing cage is reduced, thereby being more favorable for guaranteeing the construction quality and construction period.

The invention discloses a site mixing and blow-filling method of solidified dredged mud. The method comprises the steps of: (1) site mixing and blow-filling of the solidified dredged mud; (2) site solidification of the dredged mud; and (3) detection of the solidified dredged mud. The step (1) further comprises analysis of the soil texture of the dredged mud, selection of a curing agent, determination of a mixing ratio of the curing agent to the dredged mud, mixing of the curing agent and the dredged mud, reinforcing design of the solidified dredged mud and determination of the shear strength index, the modulus of compressibility of the solidified dredged mud and the thickness of a reinforced soil layer to achieve characteristic values of the bearing capacity of foundation soil and allowing deformation values of the foundation treatment design, and determination of the maintenance time of finished products. The step (2) is to finish the reinforcement of a shallow-layer soft soil foundation through mixing and solidifying the curing agent and the dredged mud. The site mixing and blow-filling method of the solidified dredged mud can achieve the purposes of guarantee of the construction days, reduction of the project cost, reasonable resource utilization and environmental protection.

The invention discloses a positioning pile-driving guide frame. The positioning pile-driving guide frame comprises a rack and a construction platform rotary plate used for driving the rack to rotate. An upper platform and a lower platform are arranged at the upper end and the lower end of the rack correspondingly. Skirt pile grippers are arranged on the upper platform and the lower platform correspondingly, the skirt pile gripper arranged on the upper platform is the upper platform skirt pile gripper, and the skirt pile gripper arranged on the lower platform is the lower platform skirt pile gripper. The center of an abdominal cavity of the upper platform skirt pile gripper coincides with the central axis of the rack. A driving mechanism is arranged between the lower platform skirt pile gripper and the lower platform and drives the lower platform skirt pile gripper to horizontally move. According to the positioning pile-driving guide frame, continuous inserting, driving and sinking conducted on inclined pile groups in abyssal regions are achieved, and the advantages of being simple in structure, convenient to construct and high in efficiency are achieved.

The invention provides a waterproof coiled material pre-paving and inverted sticking process. A waterproof coiled material is paved under a basement bottom plate and on a cushion layer and comprises an HDPE bottom film, a self-adhesive glue film and a reaction sand anti-sticking layer. The reaction sand anti-sticking layer is arranged on the self-adhesive glue film. The HDPE bottom film is arranged under the self-adhesive glue film. The waterproof pre-paving construction technology comprises the following processes of a, basic layer examination and acceptance, b, working surface transfer, c, basic layer cleaning, d, joint enhancement treatment, e, snapline positioning; f, coiled material paving, g, coiled material lapping treatment, h, coiled material head unwinding and fixing, i, self-checking and acceptance and j, working surface transfer. According to the waterproof coiled material pre-paving and inverted sticking process, compared with a traditional waterproof method, the construction time and the maintenance time of a leveling layer and a protective layer are omitted, the structure level is optimized, so that the construction period is greatly shortened, and the construction cost is greatly reduced; and the effects of environmental protection and safety are achieved, solvent and fuel are not needed in the construction process, environmental pollution and firefighting hidden dangers are avoided, and energy sources are saved.