261 results about "Assembly (construction)" patented technology

The invention relates to the technical field of wind power concrete tower drum assembly construction, in particular to a wind power concrete tower drum assembly construction temporary supporting system which comprises a supporting rod, two telescopic assemblies are arranged in the supporting rod, and a clamping rod is slidably connected into the telescopic assembly located at the lower end. A mounting rod is slidably connected into the telescopic assembly located at the lower end, a positioning plate is fixedly connected to the mounting rod, a guide slope block is fixedly connected to the upper end of the positioning plate, a slow descending slope block is fixedly mounted at the lower end of the positioning plate, a rotating sleeve is rotatably connected to the upper end of the supporting rod, and a ball assembly is arranged in the rotating sleeve. Rapid alignment and stable attachment of the tower drum are achieved through the telescopic assembly, the rotating sleeve and the like. The process is simplified through mechanical driving, the labor intensity is reduced, and the construction efficiency is improved; supporting is stable, buffering and falling prevention are achieved, and construction safety is guaranteed; the modular design is suitable for tower barrels of various specifications, repeated use can be achieved, and the construction cost is greatly reduced.

The invention provides an energy consumption dynamic monitoring and energy-saving and carbon-reducing regulation and control method for a final assembly construction production link. The method comprises the following steps: S1, acquiring energy consumption related data of each process in an industrial production cycle; s2, constructing an energy consumption prediction model which comprises a mechanical power energy consumption prediction model and a thermal process modification energy consumption prediction model; S3, inputting the data acquired in the step S1 into the energy consumption prediction model constructed in the step S2 to obtain related energy consumption prediction data; s4, converting the energy consumption prediction data into carbon emission, and calculating based on the carbon intensity coefficient of the energy type to obtain total carbon emission; and S5, inputting the total carbon emission into a multi-objective genetic algorithm to generate a Pareto optimal solution set, and obtaining an optimal combination of energy consumption and carbon emission. According to the method, the energy consumption cost, the carbon emission intensity and the production efficiency are planned as a whole through the multi-objective optimization algorithm, the global optimal decision under the equipment cooperation and dynamic working conditions is realized, and the complex requirements of multi-variety small-batch production are effectively met.

The application discloses a tunnel secondary lining steel bar standardization rapid assembly construction method. The application has two technical paths: technical path A processes five segmental assembly secondary lining steel bars outside a hole, realizes inward bending through movable hinges between segments, achieves overall reduction of the secondary lining steel bars, and finally pours secondary lining concrete through walking, jacking systems of the secondary lining steel bar assembly trolley, space dislocation of forward movement of the secondary lining trolley and re-retreat positioning. Technical path B lengthens a reserved height of a tunnel inverted arch steel bar, reduces the overall height of the secondary lining steel bars, processes secondary lining steel bar annular pieces outside the hole, realizes longitudinal transportation of the secondary lining steel bar annular pieces through walking, jacking and rotating systems of the secondary lining steel bar assembly trolley, 90-degree rotation, space dislocation of forward movement of the secondary lining trolley and re-retreat positioning, and finally pours secondary lining concrete. The two methods can realize standardization production of secondary lining steel bars outside the hole and transportation to the tunnel for installation.

The invention provides an assembly construction method of a biological shielding wall of a fusion device and the biological shielding wall. The assembly construction method of the biological shielding wall of the fusion device comprises the following steps: manufacturing a wall body framework of a prefabricated sub-module; the wall body frameworks of the prefabricated submodules are assembled in the circumferential direction to obtain an annular framework of the biological shielding wall module, and the biological shielding wall module at least comprises a top shielding module used for arranging embedded parts and a bottom shielding module used for arranging the bottom of a Tokamak Dewar base and an annular support; and the annular framework is hoisted to a pouring foundation, and the interior of the annular framework is poured after hoisting is completed every time. According to the method, on-site high-altitude, high-strength and long-time complex operation is reduced, and construction safety risks are reduced. In addition, if internal parts need to be replaced or overhauled in the future, corresponding structures on the specific prefabricated submodules can be directionally dismantled, and when the service life of the fusion device is over, modular dismantling of the biological shielding wall and waste treatment are more efficient.

The invention provides a fabricated shear wall structure and a construction method thereof, and relates to the technical field of construction.After a lower prefabricated wall is installed and fixed, a prefabricated beam is hoisted, a beam end connecting assembly at the end of the prefabricated beam is connected with a lower wall top connecting assembly arranged at the top of the lower prefabricated wall, and a prefabricated floor slab can be hoisted after connection is completed; the prefabricated floor slab is placed on the top of the prefabricated beam or the lower prefabricated wall, then the upper prefabricated wall is hoisted, the upper wall bottom connecting assembly on the upper prefabricated wall is connected with the lower wall top connecting assembly, and therefore connection of the prefabricated beam, the upper prefabricated wall and the lower prefabricated wall is completed. Continuous and rapid assembly construction can be achieved, the construction period is effectively shortened, and the technical problems that in the prior art, grouting sleeves are adopted for connection between prefabricated concrete floors and shear walls and connection between beams and shear walls, the construction period is long, and temporary supporting structures need to be additionally used are solved.

The invention discloses a double-rocker-arm derrick hoisting working condition intelligent analysis and stability improvement method, and relates to the technical field of power grid assemblage construction equipment. Working condition data of a derrick are collected in real time, and stability analysis is carried out based on the working condition data to obtain a safety coefficient representing the stability of the current working condition; the risk assessment of the hoisting operation process is realized; furthermore, a corresponding stability improvement strategy is executed based on the safety coefficient and / or the real-time working condition data, so that the system has the capabilities of intelligent decision making and active intervention, the limitation that judgment depends on artificial experience in the prior art is broken through, the stability guarantee of the derrick is converted into active regulation and control from passive protection, and the reliability of the derrick is improved. And the operation safety and decision-making scientificity under the extreme height and complex environment are obviously improved.

The application discloses a kind of based on project performance assembly construction technology system evaluation method, belong to civil engineering project management field.The application solves the problem of poor accuracy caused by subjectivity in the existing assembly construction technology system evaluation method using qualitative evaluation.The application divides assembly construction technology system project into three stages, constructs multiple input-output evaluation index system, collects input and output data of different stages of completed assembly construction project of target structure system;Three-stage super-efficiency EBM model is constructed, and the total performance and construction stage performance of the completed assembly construction project of the target structure system are obtained by using the three-stage super-efficiency EBM model and the collected data;The different assembly construction technology systems used by the target structure system are compared and evaluated according to the total performance and construction stage performance.The application is mainly used for the evaluation of assembly construction technology system.

The utility model relates to an efficient connecting structure for building assembly construction reinforcing steel bars, and effectively solves the problems of high difficulty and low efficiency of end connection of assembly type building reinforcing steel bars. According to the technical scheme, the device comprises two first connecting pipes and a second connecting pipe, external threads are arranged on the outer walls of the first connecting pipes, the screwing directions of the external threads on the two first connecting pipes are opposite, a first internal thread matched with the external threads is arranged at each end of the inner wall of the second connecting pipe, and the screwing directions of the two first internal threads are opposite; an axial avoiding groove is formed in the side wall of the first connecting pipe, one end of the avoiding groove is an open end, the other end of the avoiding groove is a closed end, and the open end is communicated to one end face of the first connecting pipe; the steel bar connecting device greatly improves the steel bar connecting speed, obviously reduces the connecting difficulty, is simple and practical, and has higher axial limiting strength.

The invention relates to the technical field of bridges, and provides a segment-assembled corrugated steel web mixed girder bridge and a construction method thereof.The areas, close to bridge piers, of side spans and middle spans are composed of first-class girder sections, and each first-class girder section comprises a first concrete top plate, a first concrete bottom plate and a first corrugated steel web; the midspan area is composed of a second type of beam sections and comprises a steel bottom plate, an ultra-high performance concrete combined top plate and a second corrugated steel web; and the combined beam section is connected between the two beam sections to realize smooth transition. Through the longitudinal partition structural design, the advantages of the respective materials are fully played, the side span-mid span ratio can be compressed to 0.35-0.60, and the span capacity is remarkably improved. An ultra-high-performance concrete combined top plate is adopted in the midspan, and the dead weight is reduced by 50%; the steel bottom plate is used for replacing a concrete bottom plate, and the cracking risk of the midspan bottom plate is thoroughly eliminated. Segmental prefabrication and assembly construction is adopted, the process is standardized, the adaptability to soft foundations is high, and the problems of midspan downwarping and web cracking are solved.

The application provides an assembled shear wall structure and a construction method thereof, and relates to the technical field of buildings. After the installation and fixation of a lower prefabricated wall are completed, a prefabricated beam is hoisted, a beam end connecting assembly at the end of the prefabricated beam is connected with a lower wall top connecting assembly arranged at the top of the lower prefabricated wall, after the connection is completed, the prefabricated floor is hoisted, the prefabricated floor is placed on the prefabricated beam or the top of the lower prefabricated wall, then an upper prefabricated wall is hoisted, an upper wall bottom connecting assembly on the upper prefabricated wall is connected with the lower wall top connecting assembly, thereby the connection of the prefabricated beam, the upper prefabricated wall and the lower prefabricated wall is completed, the installation process does not need to set a temporary support and wait for the strength formed by post-poured concrete, the continuous and rapid assembly construction can be realized, the construction period is effectively shortened, and the technical problem that the connection between the prefabricated concrete floor and the shear wall, the beam and the shear wall in the prior art needs to use a grouting sleeve connection construction period which is long and needs to use an additional temporary support structure is solved.

The utility model relates to a dense rib slab technology field especially, is particularly related to a kind of multilayer steel structure warehouse assembly type dense rib slab, including bottom plate, rib beam A and concrete layer, bottom plate is provided with clamping groove and the slider compatible with clamping groove;Rib beam A includes multiple and parallelly arranged on bottom plate, vertically connect multiple rib beam B between adjacent two rib beam A, stud is set on rib beam B, stud screw connection internal thread pipe, and internal thread pipe is covered in bottom plate;Concrete layer is set on bottom plate, and rib beam A and rib beam B are covered in concrete layer.The utility model can change the distance between the bottom end of internal thread pipe and rib beam B by rotating internal thread pipe, to adjust the thickness of bottom plate when pouring molding, and on overall architecture, increase the slider and clamping groove structure for filling gap between adjacent two bottom plates, facilitate pouring concrete layer on prefabricated slab in later period, reduce hoisting frequency simultaneously, improve the efficiency of assembly construction.

The utility model relates to a kind of cap type pier block tool for ship sub-assembly construction, including steel structure portable cap and concrete cement pier block, steel structure portable cap is detachably sleeved at the top of concrete cement pier block;Steel structure portable cap includes a roof, and the edge below of the four edges of roof is respectively welded with side edge reinforcing plate, and form the groove of bottom surface opening;Concrete cement pier block includes pier block body, and two dumper insertion holes are set in the lower part of its opposite sides, and pier block dumper insertion hole penetrates concrete cement pier block.The utility model effectively reduces the cost of all-steel pier block, solves the problem that pure concrete pier block is easily damaged and cannot be fixed linear section, has the advantages of low cost, good durability, strong adaptability, flexible transfer and the like, significantly improves the support safety and economy of ship sub-assembly construction.

The application discloses a full-assembly hollow plate type building structure and a mounting method thereof, and belongs to the technical field of building industrialized assembly type structures, and aims to solve the problems of large on-site wet work amount, welding or bolt connection, complex construction and large self-weight of components of an existing plate type assembly building connecting joint. The full-assembly hollow plate type building structure is characterized in that: prefabricated hollow floor slabs with bidirectional lengthways bottom reinforcement and bidirectional support surface reinforcement and prefabricated hollow wall slabs with double-layer bidirectional steel mesh are adopted; wall slab connecting pieces and wall slab connecting pieces with toothed plates are pre-welded and formed in a factory; a closed rectangular steel pipe-shaped cavity is formed by toothed plate occlusion at a corner part on site, and concrete is poured to form a rectangular steel pipe concrete column; upper and lower prefabricated hollow wall slabs are connected by setting wall slab vertical lap reinforcement in a second hollow channel and filling components by post-pouring connection; zero welding, no bolt connection and less wet work in full-assembly construction are realized; and the overall stress performance of the building is ensured by a unique joint structure.

The application discloses a method for reinforcing and supporting soft soil layers along a coast and rapidly recycling steel sheet piles, and the construction method comprises the following steps: measuring data, formulating a construction scheme, conducting a construction test, correcting a theoretical analysis, organizing implementation, implementing deviation correction, and recycling materials. According to the method, the pore water in the soil is slowly drained by arranging vertical drainage plates, the pore ratio is reduced, the foundation is deformed, the strength of the foundation soil is gradually increased, the drainage distance is shortened by arranging the vertical drainage plates, the consolidation of the foundation is accelerated, the preloading period of the preloading project is shortened, the foundation can reach a good consolidation effect in a short period of time, the growth of the shear strength of the foundation soil is accelerated, the rate of the improvement of the bearing capacity of the foundation is always greater than the rate of the increase of the construction load, and the stability of the foundation is ensured, the vertical supporting system is formed by combining the lock buckle of the pipe pile and the steel sheet pile, so that the rapid enclosure construction is facilitated, the pipe pile and the steel sheet pile are convenient to disassemble and recycle, and the prefabricated assembly construction is realized.

The utility model provides a prefabricated double-wall component mold, which belongs to the technical field of prefabricated double walls and comprises an upper bottom flange, a lower bottom flange, a plurality of left flanges, a plurality of right flanges, an upper top flange, a lower top flange and splicing square steel. The number of the upper bottom flange and the lower bottom flange is two, and one of the upper bottom flange and the lower bottom flange is installed on the lower side of the left-right flange. By arranging the upper and lower bottom flanges, the left and right flanges and the upper and lower top flanges and adopting the multi-combined type detachable formwork assembly, after the first wall body is poured, the formwork assembly of the second wall body can be directly installed, then the first wall body is poured, assembling of the two wall bodies is not needed, the construction procedure is simple, and consumed time is short; the product and the mold do not need to be turned over, so that expensive special equipment is not needed, one-time forming is basically achieved, the obtained prefabricated double-skin wall is better in integrity, higher in strength and precision and short in mold turnover time, and the mold cost is greatly reduced.

The present application relates to steel structure pre-assembly technical field, and is a steel structure pre-assembly technology and steel structure entity assembly construction method.The present application comprises: establishing a CAD data integration system library to collect steel structure component data; using software to make a steel structure model based on the CAD data integration system library, and establishing a three-dimensional system to simulate the first pre-assembly of the model based on drawings and data structure contours; outputting structure data information if the assembly is successful, and using other software to perform secondary assembly; extracting data from the CAD data integration system library to perform entity production assembly if the assembly demonstration is correct; if the assembly fails, performing secondary data comparison, adjusting the data integration library if the data is correct, and then performing cyclic assembly again; if the data is incorrect, correcting the data, and cyclically assembling until entity assembly is completed.The present application has obvious advantages over traditional pre-assembly technology, is accurate, reduces material loss, and simplifies entity processing procedures.

The utility model discloses a corner connecting and fixing structure and a bedstead thereof, and relates to the technical field of corner connection of furniture. According to the corner connecting and fixing structure, the first corner connector connected with the first component and the second corner connector connected with the second component are connected and matched in the mode that the end of the second component abuts against the side wall of the first component, the first corner connector is provided with the first opposite edge portion, so that a fastening point position is formed on the first component, and the second corner connector is provided with the second opposite edge portion. And the first pair of edge parts and the second pair of edge parts are fixedly connected in the direction close to each other through the fasteners, so that the first component and the second component are tightly propped against each other at an assembly included angle. According to the bed frame disclosed by the utility model, by utilizing the corner connecting and fixing structure, the assembly workload can be reduced, the field electric tool construction is convenient, the assembly construction efficiency is integrally improved, the assembled bed frame is stable and firm, and the bed frame is convenient to disassemble and carry in the later period.

The utility model discloses an assembly type prestress variable cross-section concrete filled steel tube pier which comprises an upper steel cylinder, a middle steel cylinder, a lower steel cylinder and four groups of steel strands, and the upper steel cylinder, the middle steel cylinder and the lower steel cylinder are coaxially, sequentially and fixedly connected from top to bottom. A concrete column body is arranged in each steel cylinder, four threading holes are formed in each concrete column body, the threading holes in any two adjacent concrete column bodies are in one-to-one correspondence, each group of steel strands are arranged in the corresponding threading holes in the vertical direction in a penetrating mode, an upper anchorage device is arranged at the upper end of each group of steel strands, and a lower anchorage device is arranged at the lower end of each group of steel strands. And after the prestressed tension of each group of steel strands is completed, mortar is poured into each threading hole, and after the mortar is solidified, the mortar and each concrete column body form an integrated structure. The bridge pier is manufactured in a factory in a segmented mode, quality control is facilitated, transportation is convenient, the construction period can be greatly shortened, the construction difficulty and the engineering cost are reduced, steel strand prestress tensioning assembly construction is adopted, and the overall stability and the anti-seismic performance of the bridge pier are effectively improved.

This application provides a prefabricated sliding plate component, a prefabricated sliding plate assembly structure, and a construction method thereof. The prefabricated sliding plate component includes a core load-bearing block, a pre-compression base block, and a guide slider. The pre-compression base block is connected to the core load-bearing block, and a stepped groove is formed between the pre-compression base block and the core load-bearing block. The guide slider is connected to the side of the core load-bearing block opposite to the pre-compression base block, and the top surface of the guide slider and the core load-bearing block smoothly transitions. Multiple prefabricated sliding plate components can be connected sequentially along a first direction, and in two adjacent prefabricated sliding plate components, the guide slider of one can be embedded in the stepped groove of the other. The prefabricated sliding plate component of this invention has a simple shape and high rigidity and strength. The factory prefabrication and on-site assembly construction method saves construction time and eliminates the problems of high construction difficulty and long curing time associated with cast-in-place sliding plates. After the structure has been jacked up, it can be quickly dismantled and re-laid in front of the structure, allowing for multiple reuses and reducing project costs.

The invention discloses a large-space air duct prefabrication modular rapid assembly construction method, and particularly relates to the technical field of building engineering construction, the method comprises the following steps: S1, digital design and modular planning; s2, factory intelligent prefabrication production is carried out; s3, on-site accurate measurement and positioning; s4, standardized installation of the support hanger; and S5, quickly assembling the air duct module. According to the method, static design is upgraded into dynamic adjustable intelligent planning through a closed loop of BIM, 4D construction simulation and self-adaptive adjustment, collision is avoided in the design stage, field change can be actively adapted in the construction stage, the first-pass yield of construction is greatly improved, rework caused by design change and field errors is reduced, and the construction efficiency is improved. The air duct module is accurately, stably and efficiently hoisted, so that the high-altitude manual assembly workload is reduced, the overturning risk in the hoisting process is completely eradicated, and the safety and the hoisting efficiency are both improved.

The utility model discloses a high-strength steel connecting assembly convenient for field assembly construction. The high-strength steel connecting assembly comprises a stand column connecting column, the first connecting assembly is installed on the outer side of the stand column and used for achieving rapid assembly; and the second connecting assembly is mounted on the outer side of the connecting column and is used for realizing quick assembly. The second main connecting piece and the second auxiliary connecting piece in the second connecting assembly are connected to the end of the connecting column in a sleeved mode, locking installation is carried out through the second bolt assembly, and therefore the situation that the strength of the square pipe is weakened due to the fact that holes are punched in the surface of the square column can be avoided; finally, a positioning hole in the second connecting assembly is in butt joint with a positioning hole in the first connecting assembly, and the first connecting assembly and the second connecting assembly are quickly assembled and constructed by beating a bolt, so that falling caused by the fact that welding is easily affected by stress and time can be avoided; therefore, the device can be used for mounting square columns of different gears in a detachable manner.

The present application relates to a kind of air cooling system modular combination assembly construction equipment and construction method, belong to air cooling system construction technical field.The equipment includes crane and the mobile tray for supporting wind cylinder and guard net, mobile tray outside is equipped with multiple horizontal offset detection components, angle offset detection component is equipped on horizontal offset detection component.The crane of the present application hoists wind cylinder before, wind cylinder and guard net are assembled on mobile tray, multiple horizontal offset detection components constitute annular detection piece, when crane hoists wind cylinder, wind cylinder offset is measured by annular detection piece and angle offset detection component, so that crane adjusts lifting position and lifting angle, by the combination of each unit of air cooling system into module on ground, the problem that there is not enough crane station and cross operation with other construction units is solved, reasonably utilize the narrow construction condition on site, safely, quickly install, shorten construction period, reduce construction cost.

The application belongs to the field of green building and building construction technology, and specifically discloses a green low-carbon building civil engineering integrated efficient construction building method. In view of the problems of design construction disconnection, multi-specialty cross conflict, high carbon emission and serious resource waste in traditional building civil engineering construction, the application constructs a 'cooperative design-factory prefabrication-assembly construction-low-carbon operation and maintenance' integrated system, and the method comprises the following steps: multi-specialty cooperative deepening design and carbon emission calculation based on BIM; factory prefabrication of low-carbon concrete components and integration of thermal insulation structure exterior wall; on-site assembly type construction and dry method connection; renewable energy system and photovoltaic building integrated synchronous installation; and whole life cycle carbon footprint monitoring and closed loop optimization. The application realizes the synchronous construction of the envelope structure and the main structure by driving the deep integration of industrialized production and assembly type construction through digital design, so that the construction period can be shortened, the whole life cycle carbon emission of the building can be reduced, and the civil engineering integrated green construction is realized.

The application provides a kind of total assembly construction production energy consumption dynamic monitoring and energy saving and carbon reduction regulation method, comprising: S1, the data related to energy consumption in each process in industrial production cycle is collected;S2, an energy consumption prediction model is constructed, the energy consumption prediction model includes mechanical power energy consumption prediction model and heat process improvement energy consumption prediction model;S3, the data collected in step S1 is input into the energy consumption prediction model constructed in step S2, and relevant energy consumption prediction data is obtained;S4, the energy consumption prediction data is converted into carbon emissions, and the total carbon emissions are obtained based on the carbon intensity coefficient calculation of energy type;S5, the total carbon emissions are input into the multi-objective genetic algorithm to generate the Pareto optimal solution set, and the best combination of energy consumption and carbon emissions is obtained.The application organizes energy consumption cost, carbon emission intensity and production efficiency through multi-objective optimization algorithm, realizes global optimal decision under equipment cooperation and dynamic working condition, and effectively adapts to the complex demands of multi-variety and small-batch production.

The application relates to the technical field of size measuring equipment, and discloses a prefabricated building accessory size calibration device which comprises a rack and further comprises a calibration table, a calibration ruler, a screening mechanism, a positioning mechanism and a cutting mechanism. The calibration table is slidably arranged in the rack, the calibration table is provided with a moving mechanism, the calibration ruler is arranged on the rack, the calibration table is provided with an indicating arrow, the screening mechanism is arranged on the rack, the screening mechanism comprises a screening plate, the screening plate is rotationally arranged in the rack, a pressing plate is slidably arranged on the screening plate, the positioning mechanism is arranged on the rack, the positioning mechanism comprises a positioning block, the positioning block is arranged on the rack, and the cutting mechanism is arranged on the rack. Through the technical scheme, the problem that the accuracy of measuring the steel structure by an operator holding a tape measure is poor, and it is not easy to complete the assembly construction of the steel structure in some high-precision building positions with a little deviation is solved.

According to the deeply-buried underground pipeline backfilled with the flow-state solidified soil and the construction method, combined supporting of the steel sheet piles, the full-length steel waist beams and the inner supports is adopted, a reliable supporting system which is high in rigidity and small in deformation is provided for a deep narrow groove, the construction safety of a foundation pit is greatly improved, displacement of surrounding soil is effectively controlled, adjacent buildings and pipelines are protected, and the construction period is shortened. Meanwhile, the supporting period can be remarkably shortened through assembly construction; groove foundation pit combined supporting is adopted in the influence range of an existing pipeline, and for a sensitive area adjacent to the existing pipeline, through refined and differentiated supporting combination, the excavation safety of a deep groove is ensured, and meanwhile additional stress and disturbance generated by construction to the existing pipeline are reduced to the maximum extent; the integrated protective shed is adopted to achieve integration and mechanization of backfilling and maintenance procedures, it is ensured that the fluid solidified soil is condensed and hardened under the optimal condition, shrinkage cracks are avoided, the uniformity, the overall strength and the long-term water stability of a backfilling body are guaranteed, and the construction quality and efficiency are greatly improved.

The invention relates to the technical field of pole tower installation, in particular to pole tower self-adaptive installation supporting equipment which comprises an installation platform and a pole embracing frame which is located on the installation platform and used for combining a plurality of pole embracing standard sections to form a pole tower. The vertical plate a and the vertical plate b are arranged in a spaced and relatively parallel mode, the closing plate is arranged on one side of the vertical plate a and one side of the vertical plate b, one side of the closing plate is rotationally connected with the vertical plate a through a hinge, and the other side of the closing plate is connected with the vertical plate b in an opening and closing mode. A leveling mechanism; a tilt angle sensor; and the overturning assembly is arranged on the vertical plate a, is connected with the closing plate and is used for overturning, opening and closing the closing plate. The leveling mechanism is matched with the tilt angle sensor and the controller to mount and calibrate the levelness of the bottom table, and the problems of uneven foundation, soft soil foundation and the like in the pole and tower assembling construction are solved.

The utility model belongs to the technical field of tunnel steel arch machining, and particularly relates to a universal device for accurate positioning and welding of multi-model tunnel steel arch connecting steel plates. The device comprises a longitudinal steel plate, a transverse steel plate, a positioning bolt, a transverse positioning adjusting mechanism and a fixing clamp, the transverse steel plate is connected to one plate face of the longitudinal steel plate, and the bottom edge of the transverse steel plate is perpendicular to the axis of the longitudinal steel plate to form a T-shaped structure. The positioning bolt is connected to the other plate surface of the longitudinal steel plate; the transverse positioning adjusting mechanism is vertically connected to the plate surface of the transverse steel plate; the fixing clamps are connected to the upper surfaces of the transverse steel plates. When the connecting plates are welded to the ends of the steel arch segments, accurate positioning can be achieved, the problem that bolt holes are not aligned when two adjacent arch segments are assembled on site is effectively solved, the defective rate is reduced, and the construction efficiency of assembling the tunnel preliminary bracing steel arch on site is improved. The device is suitable for welding and processing the end connecting steel plates of the I-shaped steel arches with different specifications and models, and is high in applicability.

The utility model discloses a kind of protective support for civil engineering and construction, it is related to building assembly technical field;And the utility model includes chassis, the upper surface of chassis is fixedly provided with hollow pole, the inside of hollow pole is slidably provided with support rod, and the one end of support rod is fixedly provided with fixed frame, support assembly is set on fixed frame, and lifting assembly is set on hollow pole and chassis;Support assembly includes U-shaped bracket, two limit plates are slidably arranged in U-shaped bracket;In the utility model, by the support assembly, the butt joint of single or double ventilation ducts in the process of assembly construction can be supported and limited by the action of U-shaped bracket, two limit plates and stud in support assembly, so as to improve the convenience of ventilation duct assembly construction operation, and then improve the efficiency of ventilation duct assembly construction, while avoiding the safety accident caused by falling of ventilation duct due to lack of support, and then reduce the risk coefficient of ventilation duct assembly construction.

The invention relates to a plateau railway small-section tunnel bottom kilometer detection and drilling and blasting equipment integrated lining prefabrication and assembly comprehensive construction method. The method comprises tunnel bottom advanced kilometer detection operation, drilling and blasting supporting multifunctional integrated operation, secondary lining prefabrication and assembly operation and deeply-buried ditch pipe joint pushing type operation. According to the method, kilometer-level advanced geological forecast and pressure relief drainage, small-section drilling and blasting equipment integrated construction, full-ring prefabricated lining assembly construction and deeply-buried ditch pushing arrangement are sequentially achieved, and whole-process integrated construction is formed.