140results about How to "Simple construction method" patented technology

The invention relates to the technical field of bridge construction, and provides a construction method of a cable-stayed-continuous cooperative system composite beam bridge, which does not need to arrange a large batch of prestressed corrugated pipes and steel beams to ensure the use performance of a bridge deck slab, fully utilizes the structural characteristics of the cable-stayed-continuous cooperative system composite beam bridge, and improves the construction efficiency of the cable-stayed-continuous cooperative system composite beam bridge. By changing the overlapping sequence of the continuous composite beam bridge deck slabs, it is guaranteed that the bridge deck slabs in the hogging moment area of the continuous composite beam do not generate tensile stress, the bridge deck slabs in the sagging moment area generate pressure stress reserve, and by increasing the tension stay cable force, the continuous composite beam moves upwards close to a side main beam of the cable-stayed bridge and moves downwards close to a side span side main beam; the bridge deck slab generates compressive stress, the steel main beam generates tensile stress, the compressive property of concrete materials and the tensile property of steel are fully played, the material utilization rate is increased, the compressive pre-stress of the bridge deck slab is completed through internal force distribution of the composite beam, the construction method is simple and operable, the structural stress is clear, and the reasonability and safety of the structural stress are guaranteed.

The invention relates to the technical field of high polymer materials, and provides a radiation refrigeration coating and a preparation method thereof.The radiation refrigeration coating is prepared from, by weight, 5-20 parts of heat reflection filler, 5-20 parts of heat radiation filler, 5-20 parts of common filler, 0.1-0.5 part of a thickening agent, 10-25 parts of aerogel paste, 0.25-0.75 part of a water repellent agent, 0.2-0.5 part of a defoaming agent, 0.3-1.5 parts of a dispersing agent, 0.1-0.3 part of a pH value regulator and 0.3-1 part of a sterilizing, anti-corrosion and anti-mildew agent, 0.1-0.5 part of a wetting agent, 25-40 parts of an acrylic emulsion, 1-2 parts of an anti-freezing agent, 2-4 parts of a coalescing agent and 15-30 parts of water; the functional coating with both high reflection and radiation refrigeration, provided by the invention, is remarkable in reflective insulation / radiation refrigeration effect, non-toxic, odorless, pollution-free and convenient to construct, and is an ideal decorative material.

The invention discloses a canal channel construction area excavation quality three-dimensional visualization control system, and belongs to the technical field of constructional engineering. The system comprises a three-dimensional scanning device, a data processing device, a three-dimensional visualization display module, a quality comparison detection module, a system control decision module, a remote communication monitoring module and a historical data storage module. The data are compared with a standard three-dimensional model generated by a design drawing, a deviation area is accurately detected, the construction precision and quality are improved, it is ensured that construction always meets design requirements, real-time data of a construction site are converted into the three-dimensional model, constructors are helped to rapidly recognize problems and adjust the problems in time, and the construction efficiency is improved. According to the invention, automatic correction suggestions are provided for constructors, the construction method, equipment selection and resource allocation are optimized, the construction efficiency is greatly improved, and the remote and high-efficiency construction requirements can be met through remote communication and remote control functions.

The invention discloses a novel reinforced concrete prefabricated pipe gallery construction method, relates to the technical field of industrial and civil structure reinforced concrete prefabricated pipe galleries, and solves the technical problems of short construction period and low cost. The method comprises the steps that firstly, concrete beams and columns of the reinforced concrete pipe gallery are split according to a construction drawing and then prefabricated in a prefabrication yard; 2, after construction of the cup foundation is completed, the corresponding prefabricated columns and prefabricated beams are transported to the side of the foundation, the prefabricated columns are hoisted and fixed in the cup foundation, temporary inclined struts are installed, then the prefabricated beams are installed and fixed layer by layer through an elevator or a crank arm vehicle, and formwork clamps are installed at the beam column connecting joints; thirdly, after completion, high-strength-grade non-shrinkage concrete is poured, and therefore the transverse frame without weakening of the integrity is formed; the construction method is simple and easy to operate, and the requirement for the construction technology is not high.

The invention relates to a prefabricated reinforced concrete silo and a construction method thereof.A silo body of the silo is provided with a plurality of silo layers formed by mutually assembling and connecting arc-shaped reinforced concrete prefabricated pieces, positioning steel bars are arranged on supports of the silo, and positioning through holes are formed in the reinforced concrete prefabricated pieces; positioning during assembly of the prefabricated pieces is achieved through the positioning steel bars and the positioning through holes which are matched with each other, positioning is simple, convenient and rapid, the bin body assembly efficiency can be effectively improved, the two adjacent barrel layers of the bin body are bonded and fixed through cement mortar, the two adjacent prefabricated pieces of the same barrel layer are matched through concave-convex spigots and locked through locking bolts, and the bin body assembly efficiency can be effectively improved. Every two upper and lower adjacent prefabricated pieces are connected in a sleeve grouting mode, the connecting strength of the prefabricated pieces can be effectively improved, and the structural stability of the silo is improved.

The invention relates to a fabricated track structure facilitating vibration reduction upgrading and a construction method. According to the fabricated track structure convenient for vibration reduction upgrading, the prefabricated track plate is provided with a first supporting surface and an arrangement space, and the top surface of the base is provided with an embedded sleeve, so that a supporting adjusting piece or a special vibration reduction component can be detachably connected between the prefabricated track plate and the base through a fixing bolt; therefore, the replacement from the support adjusting piece to the special vibration reduction component can be realized, that is, common vibration reduction can be upgraded to special vibration reduction; and the corners are arranged through the prefabricated track plates, so that the second supporting surfaces of the prefabricated track plates are lower than the first supporting surfaces, and then the anti-vibration pads can be laid between the prefabricated track plates and the base after the supporting adjusting pieces are dismounted, namely common vibration reduction can be upgraded to high-level vibration reduction. According to the assembly type track structure facilitating vibration reduction and upgrading, conversion or upgrading from common vibration reduction to high-level vibration reduction and special vibration reduction can be achieved at the same time. And compared with the prior art, the replacement efficiency is high.

The invention discloses a rapid plugging device used after collapse lifting and a plugging method. The rapid plugging device comprises a plurality of frames which are connected with one another. Each single face of each single frame comprises an upper chord, a lower chord, vertical rods and inclined rods, the vertical rods connect the two ends of the upper chord and the two ends of the lower chord to form a frame-shaped structure, the inclined rods are obliquely connected into the frame-shaped structure, the four single faces serve as side faces and are perpendicularly welded to one another to form a cube structure, and iron gauzes are welded to the peripheries of the four side faces. The end parts of the upper and lower chord members are welded with female and male joints for transverse connection, and the top and bottom parts of the upper and lower chord members are provided with screw holes for vertical connection. According to the method, the water flow speed of the breach can be effectively reduced, and good construction conditions are provided for follow-up blocking and reinforcing of the burst embankment.

The utility model provides a deep foundation pit supporting structure, which relates to the technical field of foundation pit supporting and comprises an external Larsen steel sheet pile and a steel enclosing purlin positioned on the inner side of the Larsen steel sheet pile, and the inner side of the steel enclosing purlin is connected with a steel supporting piece through a steel cushion box; a plurality of layers of steel enclosing purlins are horizontally arranged, each layer of steel enclosing purlins is connected with a layer of steel supporting pieces, four sets of steel supporting pieces are arranged on each layer of steel enclosing purlins, and a set of steel supporting pieces is connected between the steel enclosing purlins on the inner sides of every two adjacent Larsen steel sheet piles. Each set of steel supporting pieces comprises at least two steel supporting pieces, each set of steel supporting pieces comprises a long support and a plurality of short supports, and the long supports and the short supports of each set of steel supporting pieces are arranged in parallel. The utility model has the beneficial effects of reasonable design, simple structure, safety and reliability, and can provide reliable support for different soil layers, improve the supporting effect and reduce the construction difficulty and cost.

The utility model provides an ecological reservoir for water conservancy and hydropower engineering, which comprises a reservoir body, and the reservoir body comprises a dry stone protection slope, a coarse sand layer, a natural sodium bentonite waterproof blanket and a plain soil layer which are sequentially arranged from top to bottom; a plurality of parallel water permeable pipes are laid below the bottom wall of the reservoir at intervals, each water permeable pipe is provided with a check valve at intervals, and the lower surface of each water permeable pipe is coated with non-woven geotechnical cloth. The stress on the bottom of the reservoir body is reduced by arranging the water permeable pipe below the reservoir body, and the crack resistance of the reservoir is comprehensively improved by combining with the arrangement of the expansion joints; the ecological reservoir takes the natural footstone as a slope protection, the bentonite waterproof blanket is waterproof, the construction method is simple, the anti-seepage effect is good, and the ecological reservoir is economical, practical, ecological and environment-friendly.

The invention discloses an anti-collision device of a construction elevator. The anti-collision device comprises a construction elevator door and a three-dimensional buffer device, the three-dimensional buffering device can synchronously ascend and descend along with the construction elevator door, when the construction elevator door is opened, the three-dimensional buffering device automatically moves upwards along with the construction elevator door without affecting entering and exiting of the construction elevator, when the construction elevator door is closed, the three-dimensional buffering device automatically moves downwards, and the three-dimensional protection effect is achieved through the adjustable three-dimensional device; the telescopic buffering device can maintain the safe distance between the trolley and the construction elevator door, safety accidents are avoided, the device adopts the buffering energy absorption technology of the spring, impact force can be effectively dispersed when the trolley collides, the elevator door is protected against damage, meanwhile, the construction method is simple, convenient and easy to implement, and the construction cost is reduced. Rapid installation can be achieved without greatly transforming an existing construction elevator, and powerful support is provided for construction safety management.

The present invention discloses a variable-section tunnel construction method, including: constructing a first section of the tunnel by a first tunnel boring machine; setting a first receiving well for receiving the first tunnel boring machine at the end position of the first section of the tunnel; in the first receiving well, replacing the first tunnel boring machine with a second tunnel boring machine, the construction section sizes of the first tunnel boring machine and the second tunnel boring machine are different; converting the first receiving well into a starting well of the second tunnel boring machine; constructing a second section of the tunnel by the second tunnel boring machine; setting a second receiving well for receiving the second tunnel boring machine at the end position of the second section of the tunnel. The functions of receiving and starting can be realized through the same working well, thereby achieving the purpose of reducing construction costs and improving construction efficiency. In addition, the construction of different tunnel sections can be realized, which can effectively reduce construction costs compared to traditional integrated switching construction equipment, and the construction method is simple and easy to operate.

The utility model relates to a prefabricated beam edge overhanging operation frame for a multi-layer industrial factory building, which is mounted on an edge prefabricated main beam through mounting holes reserved in the edge prefabricated main beam and comprises a plurality of overhanging cross rods, lower supporting rods, fixing rods, vertical connecting rods, inclined supporting rods, protective vertical rods, protective cross rods and large walkway cross rods. The mounting holes are reserved in the edge precast beam, and the overhanging type handling frame can be mounted on the side face of the precast beam in a steel pipe overhanging mode, so that the defects in the prior art are overcome; particularly, the operation frame can be installed on the precast beam in advance before the precast beam is hoisted, and after the precast beam is hoisted to a floor, floor surface edge protection is immediately formed, so that the safety risk of follow-up high-altitude operation is avoided.

The invention discloses a shield launching well rail supporting device and a construction method, and relates to the technical field of shield construction, the shield launching well rail supporting device comprises a prefabricated concrete pier, and the prefabricated concrete pier is composed of a barrel body and concrete poured in the barrel body; the at least two groups of precast concrete piers are arranged side by side, the top of each group of precast concrete piers is connected with a first support, the side-by-side first supports are connected through second supports perpendicular to the first supports, and the second supports serve as sleepers of a horizontal transportation track. Concrete is poured in the barrel body to form the prefabricated concrete pier to replace I-shaped steel horse stool supporting leg laying rails, and the compressive strength and the stability are high; the waste oil drum can be recycled, and the construction cost is reduced; and the construction method is simple and convenient to operate.

The invention provides a multi-layer composite spherical tank heat insulation structure which comprises a plurality of felt-shaped heat insulation material layers and paste-shaped heat insulation material layers which are alternately arranged on a storage tank body and wrap the storage tank body. The felt-shaped heat insulation material layer and the paste-shaped heat insulation material layer are both aerogel coatings. Comprising strip-shaped heat insulation materials which are wound on the surfaces of felt-shaped heat insulation material layers in a transverse or longitudinal mode and used for fixing the first felt-shaped heat insulation material layer, the third felt-shaped heat insulation material layer, the fifth felt-shaped heat insulation material layer and the like. The netted heat insulation layer is used for fixing the second layer, the fourth layer, the sixth layer... the felt-shaped heat insulation material layer; and the outer protective layer structure plays a role in protecting the whole heat insulation structure. The aerogel felt and the aerogel coating are jointly applied to the storage tank heat insulation field for the first time, and compared with a traditional heat insulation material, the material has the obvious advantages of heat insulation, fire prevention, hydrophobicity and the like; the energy-saving effect of a heat insulation system can be improved, the service life can be prolonged, and the anti-corrosion function, the bonding function, the sealing function, the protection function and the like of a heat insulation structure can be improved.

The multifunctional double-row construction method pile supporting structure comprises front-row SMW construction method piles, rear-row SMW construction method piles, top beams and connecting beams, the rear-row SMW construction method piles are arranged on the rear sides of the front-row SMW construction method piles, and the pile tops of the front-row SMW construction method piles and the pile tops of the rear-row SMW construction method piles are connected through the top beams correspondingly; the front-row SMW construction method piles and the rear-row SMW construction method piles are connected through connecting beams, and after building construction is completed and a foundation pit is backfilled, pipelines are laid between the front-row SMW construction method piles and the rear-row SMW construction method piles. According to the multifunctional double-row construction method pile supporting structure for the waterworks, the H-shaped steel in the SMW construction method piles can be repeatedly used and is environmentally friendly and economical, the water stopping effect of an enclosure structure can be effectively improved, the integrality is better, the construction efficiency is improved, and meanwhile waste concrete is reduced; and after building construction is completed, the double-row construction method piles can be reused to serve as a pipeline supporting structure, the economical efficiency is improved, and meanwhile the construction method is more convenient.

The utility model provides a catenary tunnel embedded chute detection device which comprises a moving plate, moving wheels are arranged at the four corners of the bottom of the moving plate, an adjusting platform is arranged on the moving plate, a detection plate is installed above the adjusting platform, two sets of laser devices are installed on the detection plate in a sliding mode, and the two sets of laser devices are arranged on the adjusting platform. A graduated scale is arranged on the side face of the detection plate, a reserved hole used for containing a gradienter is formed in the upper surface of the detection plate, and an adjusting assembly used for adjusting the detection plate to be horizontal is arranged between the adjusting platform and the movable plate. The device is simple in structure and reasonable in design, can effectively measure the width of the pre-embedded chute, greatly improves the detection efficiency of the overhead line system reserved tunnel chute, simplifies the on-site detection and adjustment process, and enables the detection and adjustment process to be accurate, simple and efficient.

A bonding anchor type pre-anchored pressure-yielding hollow anchor and anchoring method, which still has a good supporting effect under the condition of large deformation of the surrounding rock to ensure the stability of the tunnel, meet the problem of large deformation of the tunnel surrounding rock, and realize the rapid installation of the anchor, solve the technical problem of mixing and anchoring of the bonding anchor type pre-anchored hollow anchor. A constant resistance pressure-yielding mechanism is arranged at the rear of the hollow anchor rod body, and the constant resistance pressure-yielding mechanism includes an outer sleeve, a pressure-yielding cylinder and a pressure-yielding nut. The pressure-yielding cylinder is sleeved in the outer sleeve, and its distal and proximal ends have guide sections that slide with the annular inner wall of the outer sleeve, and the deformation section formed by radial inward contraction is between the distal and proximal guide sections. The distal end of the outer sleeve is a limit ring formed by radial inward contraction, and the rear of the hollow anchor rod body passes through the limit ring and the inner cavity of the pressure-yielding cylinder, and the pressure-yielding nut is threadedly connected with the hollow anchor rod body and acts on the inner wall of the transition section between the proximal guide section and the deformation section, and the end face of the distal guide section acts on the limit ring. The backing plate is sleeved on the outer sleeve, the nut is threadedly connected with the external thread section at the rear of the outer sleeve, and the front end surface of the nut acts on the backing plate surface.

The chimney anti-corrosion structure comprises an outer cylinder and a steel inner cylinder, an anti-corrosion layer is arranged on the inner circumferential face of the steel inner cylinder, the anti-corrosion layer sequentially comprises a framework, a primer layer, foam glass bricks and a protective layer from inside to outside, the framework is installed on the inner circumferential face of the steel inner cylinder, and a plurality of brick lattices are formed between the framework and the steel inner cylinder. The primer layer and the foam glass bricks are sequentially arranged in the brick lattices, and the protective layer is arranged on the outer sides of the framework and the foam glass bricks. According to the anti-corrosion structure, the framework serves as an installation foundation of the foam glass bricks and plays a role in supporting and fixing the foam glass bricks, and the foam glass bricks have the advantages of being resistant to chemical corrosion, resistant to high temperature, excellent in heat insulation performance, resistant to temperature change, light in weight, low in volatilization, safe to construct, long in service life, resistant to fire disasters and beneficial to relieving chimney rain. Construction is simple, and corrosion resistance is high.

A method for unloading and balancing the construction of a newly built rectangular jacking pipe passing through an existing subway tunnel, including the following steps: arranging deformation monitoring points of the existing tunnel; calculating the excavation influence range; measuring and setting out, installing the jacking machine frame, backrest, and main jacking device, equipment debugging, and the jacking machine entering the tunnel; hanging and placing cushion blocks and pipe sections; jacking and measuring; injecting soil consolidation slurry; monitoring the deformation of the existing tunnel; judging the maximum uplift value of the tunnel, and deciding whether to take ballasting measures according to whether the maximum vertical displacement value of the arch of the existing tunnel is greater than or equal to the set warning value; stacking and weighting; and the jacking machine exiting the tunnel. The present invention takes targeted deformation control measures for the existing tunnel based on the calculated excavation influence range and the dynamic monitoring results of the tunnel deformation, avoiding the loss of manpower and material resources caused by blind control; according to the unloading balance method, the pipe sections are stacked and weighted to balance the unloading stress generated by the soil layer below, which can effectively achieve the purpose of controlling the deformation of the existing tunnel; the construction efficiency is high and the cost is low.

The invention provides a heat preservation type building steel structure, and relates to the technical field of building steel structures. The tightening fixing mechanism is mounted on the surface of the supporting mechanism; the left and right ends of the heat-insulating material mounting mechanism are connected with the supporting mechanism and the tightening and fixing mechanism; the supporting and connecting assembly is installed on one side of the supporting mechanism. The button rotation control mechanism is installed in the supporting and connecting assembly. One end of the butt joint mechanism is connected with the button rotation control mechanism; the limiting releasing mechanism is connected with the docking mechanism; thermal insulation materials can be conveniently placed, and the thermal insulation effect is improved; multiple groups of screws can be controlled to be automatically butted and inserted, the multiple groups of screws are controlled at one time to complete fastening and fixing, the construction speed is high, and the danger is reduced; the problems that the distance between supporting rod pieces of a building steel structure is large, heat preservation materials are troublesome to install, the connecting mode depends on a large number of screws for fixing, construction complexity is increased, construction time is shortened, working efficiency is reduced, and certain danger exists are solved.

The invention provides a construction method for replacing an old pile, which comprises the following steps: excavating until the top of the old pile is exposed, excavating a plurality of resistance reducing holes for reducing pile pulling resistance in the circumferential direction of the old pile, installing a plurality of supporting devices to prevent the old pile from toppling over, and after the plurality of resistance reducing holes are excavated, pulling out the old pile by adopting a hoisting device to form an old pile hole. And the old pile hole and the multiple resistance reducing holes form a semi-excavation area so as to be continuously used for new pile construction. According to the construction method, the friction force between the old pile and the surrounding soil body can be reduced directly through drilling of an excavator in a construction site, the supporting device prevents the old pile from toppling over in the resistance reducing hole excavation process, the old pile is directly pulled out in a hoisting mode, the mechanical and labor cost during pile crushing and clearing is reduced, and a semi-excavation area formed through excavation in the period can be used for new pile construction again. The supporting device has the beneficial effects that the construction efficiency is high, the mechanical and labor cost in the construction process can be reduced, the construction method is simple, and the supporting device is low in manufacturing cost, detachable, reusable and convenient to popularize.

The invention provides a flood control tree pool structure suitable for arbor on the upstream side of an earth embankment and a construction method of the flood control tree pool structure, and belongs to the technical field of water conservancy project flood control and garden engineering. The annular graded broken stone inverted filter layer is laid at the bottom of the grouted block stone well ring; the annular water-permeable grating is laid at the bottom of the grouted block stone well ring; the annular water-permeable grating comprises an inner-ring annular water-permeable grating and an outer-ring annular water-permeable grating, and the annular graded broken stone inverted filter layer is clamped between the inner-ring annular water-permeable grating and the outer-ring annular water-permeable grating; the annular pebble ring layer is laid at the bottom of the grouted block stone well ring; the annular pebble ring layer is arranged between the outer ring annular water-permeable grating and the inner wall of the grouted block stone well ring; the annular graded broken stone inverted filter layer, the annular water-permeable grating, the annular pebble ring layer and the mortar block stone well ring are concentrically arranged, and the arbor is located in the center of the inner ring of the annular water-permeable grating. According to the method, arbor root system damage caused by direct soil filling heightening or replacement filling rolling construction on the periphery of the arbor trunk can be avoided, the phenomenon that arbor stops growing and even decays due to the fact that the arbor root system respiration is inhibited by directly thickening the soil layer on the periphery of the arbor can be avoided, and the follow-up survival environment of the arbor is improved.

The utility model discloses a post-tensioned prestressing self-resetting assembly type RCS beam column joint which comprises a precast concrete column, a steel beam, a first lug plate, a second lug plate, a pin shaft, a shearing screw rod, a prestressing steel bar and a prestressing anchorage device. One end of the first lug plate is fixedly connected with the prefabricated concrete column, the other end of the first lug plate is movably connected with the second lug plate through a pin shaft and a shearing screw, and the other end of the second lug plate is fixedly connected with the steel beam. And the other end is anchored and connected with the steel beam through a pre-stressed anchorage device after being tensioned. According to the assembly type RCS beam column joint, energy can be dissipated through plastic deformation generated by the bending and shearing action of the shearing screws under the earthquake action, the joint is endowed with the good self-resetting capacity through the tensioned prestressed tendons, and the anti-seismic performance and the post-earthquake repairable performance of the assembly type RCS beam column joint can be remarkably improved.

The invention provides a support construction method applied to a cast-in-place bearing platform void part in a mountainous area. The support construction method comprises the following steps that S1, brackets are welded to the corresponding positions of the side walls of poured adjacent pile foundation steel casings at the bearing platform void position; s2, hot-rolled H-shaped steel is sequentially erected above the brackets; s3, I-shaped steel is arranged above the hot-rolled H-shaped steel at equal intervals; and S4, a formwork is laid on the I-shaped steel, bearing platform concrete is poured in a layered mode, and construction is completed. According to the method, the corbel is welded on the surface of the cast pile foundation steel casing, and the H-shaped steel and the I-shaped steel are erected to construct the concrete pouring platform, so that the construction method is optimized when the void condition exists in the design position of the bearing platform.

The present application relates to the technical field of roof and canopy drainage construction, and the roof drainage form is divided into free falling water and organized drainage method, wherein: the cast-in-situ concrete eaves gutter form is made together with the roof beam structure during the roof construction; the customized stainless steel U-shaped groove or the purchased finished product aluminum alloy and plastic eaves gutter must be installed and fixed on the canopy or sun room support structure. When the roof panel and canopy panel are more projected from the roof support structure, or the edge of the drip line is not provided with the cross beam, then the eaves gutter cannot be installed. The present application "a kind of eaves gutter installed on the edge of roof panel and canopy panel material" only needs to be installed on the edge of the roof and canopy panel drip line, and does not need to be connected and fixed with the structural components of the roof panel and canopy, and has the advantages of simple structure, wide application range, economy and practicality, and flexible installation.

The invention belongs to the technical field of electric power engineering, and particularly relates to a main transformer hydraulic sliding propulsion in-place device and a construction method.The construction method comprises the following steps that S1, a special main transformer foundation is designed and built, the foundation is composed of four long-strip-shaped foundations, the length of each foundation is 7 m, the width of each foundation is 1 m, the depth of each foundation is 1.2 m, and each foundation is made of concrete; s2, before the main transformer enters the site, the road is leveled, and the periphery of the retaining wall is leveled and compacted; the construction method is more concise, the requirement for the construction environment is low, therefore, the cost is relatively low, the construction cost can be saved, the installation precision can be improved, after the main transformer is in place, it can be guaranteed that the axis and the center line of the main transformer are kept consistent through fine adjustment of the main transformer body, and the construction efficiency is improved. Therefore, the installation precision of the transformer is improved, and stable operation of a power system is ensured.

The present invention discloses a convenient desilting device for a municipal sewage well and a construction method, comprising a ground, wherein a sewage well body is buried inside the ground, a keel frame is arranged on the right side of the top of the ground, and movable wheel groups are fixedly installed at the four corners of the bottom of the keel frame, a conveying mechanism is arranged at the bottom of the inner side of the keel frame, and a limiting mechanism is arranged at the top of the inner side of the keel frame. The present invention drives a cleaning drill bit to rotate by a motor to clean out the silt in the sewage well body, replacing traditional manual cleaning with high speed and high efficiency, and can also convey the cleaned silt to a gathering point to avoid accumulation around the sewage well body and falling back into the sewage well body, and the present invention focuses on replacing traditional manual cleaning and conveying the cleaned silt, and the above two functions are integrated on one device to realize synchronous use, which is conducive to popularization and use.

The invention discloses a stiff steel column precise mounting structure based on fiber bragg gratings and a monitoring method, and relates to the technical field of stiff steel column mounting and monitoring. Comprising a stiff steel column, the horizontal section of the stiff steel column is H-shaped, a temporary fixing cable rope is installed on the stiff steel column, and a flexible curvature sensor is installed between the temporary fixing cable rope and the stiff steel column; the flexible curvature sensor comprises a polydimethylsiloxane flexible film, the end part of the polydimethylsiloxane flexible film is provided with an FBG sub-sensor, and the interior of the polydimethylsiloxane flexible film is provided with a tapered optical fiber; a grating array is arranged in the tapered optical fiber; and the sensing ends of the FBG sub-sensors are respectively adhered to a web plate and a flange of the stiff steel column and the temporary fixed mooring rope. According to the invention, the technical problems of complex measurement, installation precision and positioning stability are solved, and installation deviation of the stiff column caused by deviation in the installation process is prevented.

The invention discloses a heating combined vacuum well point foundation pit dewatering system and a using method thereof, and belongs to the technical field of engineering construction.The heating combined vacuum well point foundation pit dewatering system comprises a foundation pit area formed by surrounding a natural ground, and soil body heating units are annularly arranged on the periphery of the foundation pit area at intervals; the soil body heating unit is provided with a heating element for heating a soil body which is not less than the depth of the foundation pit; well point dewatering units are arranged on the periphery of the foundation pit area in the circumferential direction at intervals and located on the outer side of the soil body heating unit. According to the system, the water permeability of the low-permeability soil layer is improved through heating, the precipitation efficiency is remarkably improved, the period is shortened, different foundation pit requirements are met, precipitation rate control and energy consumption optimization are achieved by optimizing the vacuum degree and the heating temperature, and therefore the construction cost is reduced, and the overall construction efficiency is improved.

The utility model discloses a cross-core sleeve and a steel beam-steel pipe column connection node using the same, the cross-core sleeve is characterized in that two groups of circular through holes are oppositely arranged on a steel pipe column, the two groups of circular through holes are respectively arranged on two opposite side walls of the steel pipe column, and a cross-core threaded sleeve is arranged in each through hole; a full thread is arranged in the cross-core threaded sleeve; the steel beam and the connecting fastener are further included; the steel beam comprises H-shaped steel and end plates, the end plates are fixedly arranged at the ends of the H-shaped steel, connecting holes are formed in the end plates, the two side walls of the steel pipe column are each provided with one H-shaped steel, and the ends of the H-shaped steel are connected with the full threads in the penetrating threaded sleeve in a matched mode through connecting pieces. The problem that an existing steel pipe concrete column and steel beam connecting joint cannot be connected through bolts is solved, bolt connection is achieved, and disassembly can be conveniently conducted after installation is completed.