1253 results about "Purlin" patented technology

The invention discloses a fully-recycled prestressed square pile and latticed column combined stand column pile construction method, and belongs to the technical field of green foundation pit supporting. According to the construction method of the fully-recycled prestressed square pile and latticed column combined stand column pile, the prestressed square pile serves as the lower section of the stand column pile and is organically combined with the latticed column, the stand column pile can be pressed into the designed elevation through static pressure equipment, and the construction method has the advantages of being low in construction cost, high in construction efficiency, free of pollution and the like; the stand column piles are integrally pressed into a soil body, the foundation pit soil body is excavated layer by layer, concrete supports and surrounding purlins on the periphery of a foundation pit are supported layer by layer through self-servo hydraulic converters and supporting cross beams, foundation pit construction operation is easy and efficient, and construction is safer and more stable; moreover, after a bottom plate and structural floor slabs of all layers are built, the stand column piles can be recycled by 100%, zero emission is truly achieved, the low-carbon, environment-friendly and green construction effects are achieved, in addition, sensors can be arranged in the pile sections of the prestressed square piles, and foundation pit full-section monitoring and deformation control are achieved.

The present invention relates to an assembled steel sheet pile enclosure structure and a construction apparatus and construction method therefor. A waterproof curtain of the enclosure structure is formed by continuously assembling a plurality of steel sheet piles. Guide-rail-type steel enclosing purlins are detachably connected to the waterproof curtain. Self-adaptive flange devices are detachably connected to the guide-rail-type steel enclosing purlins. A hydraulic device, a moving pile clamping device, a vertical rod, and a fixed pile clamping device of the construction apparatus are sequentially connected from bottom to top and are fixed to one side of a base; a counterweight block is fixed on the other side of the base; and pressure-adjustable tires are arranged at the bottom of the base. The construction method comprises: a pushing rod moving towards a foundation pit; a connecting rod assembly driving a moving gear to extend out of a housing and be engaged with a rack of the corresponding guide-rail-type steel enclosing purlin; driving the moving gear to rotate and drive the corresponding self-adaptive flange device to slide to a steel support mounting position along the rack; the pushing rod moving in the direction facing away from the foundation pit; the connecting rod assembly driving the moving gear to be disengaged from the rack; and a brake synchronously extending out of the housing and being meshed and fixed with the rack.

The invention relates to the technical field of building construction, in particular to a supporting system based on double-row steel sheet piles and grouting steel pipe piles and a construction method, the supporting system comprises inner-row steel sheet piles, outer-row steel sheet piles and steel enclosing purlins, and the inner-row steel sheet piles and the outer-row steel sheet piles comprise the inner-row steel sheet piles and the outer-row steel sheet piles; the inner-row steel sheet piles and the outer-row steel sheet piles are arranged in parallel and then are connected in a welded mode through steel enclosing purlins, and triangular steel brackets are arranged at the positions, connected with the inner-row steel sheet piles and the outer-row steel sheet piles, below the steel enclosing purlins. According to the technical scheme, the inner row steel sheet piles and the outer row steel sheet piles are connected into an overall stress system, compared with cantilever type steel sheet piles, stress is definite, deformation of the steel sheet piles is small, safety is good, the steel sheet piles are suitable for large excavation depth, influences on peripheral pipelines are avoided, and then cost is saved.

The invention discloses a double-row steel sheet pile and soil core combined cofferdam structure and a construction method. The double-row steel sheet pile and soil core combined cofferdam structure comprises double-row pile connecting units, steel sheet piles, brackets, steel enclosing purlins, dredger fill and drainage plates. Each double-row pile connecting unit is formed by welding an upper connecting plate between two connecting steel sheet piles; the double-row pile connecting units are inserted into a soil body, and a steel sheet pile is inserted between every two double-row pile connecting units; corbels are welded to the outer sides of the steel sheet piles, steel enclosing purlins are arranged on the corbels, and the steel enclosing purlins, the steel sheet piles and the corbels are connected in a welded mode; dredger fill is filled between the two rows of steel sheet piles and is compacted by a hammer-attached soil squeezer; a drainage plate is inserted into the dredger fill; earth excavation is conducted on the side, close to water, of the double-row pile cofferdam to form a foundation pit; when shallow excavation is conducted on the foundation pit, no sand filling pipe bag is arranged; when the foundation pit is deeply excavated, a slope section is reserved; sand filling pipe bags are arranged on the outer side of the slope section and stacked on the outer side of the slope section in a staggered mode. The hammer-attached soil squeezing device comprises an attached hammer, a pressing plate, water permeable holes, geotechnical cloth and a brush.

The invention relates to the technical field of foundation pit supports, in particular to a repeatable assembly type steel support for foundation pit construction, which comprises an extension steel support, a butt joint steel support, a main steel support, an axial force supplement steel support, two jacks and two steel enclosing purlins, the butt joint steel support is fixedly connected with the main steel support, and the axial force supplement steel support is slidably connected with the inner wall of the main steel support; the two ends of the axial force supplementing steel support and the two ends of the extension steel support are fixedly connected with the jacks respectively. The quick dismounting and mounting mechanism is arranged to be linked with the anti-deformation mechanism, the axis of the extension steel support is limited, and the situation that when the axial force is insufficient, the joint of the extension steel support and the butt joint steel support collapses due to the gravity effect is prevented. Meanwhile, the gravity direction of the steel support is changed through a fixing plate on the gravity compensation axial force mechanism, the gravity of the steel support acts on a hinged plate downwards all the time, then a sliding plate and the axial force compensation steel support are driven to abut against the foundation pit, the installation time is shortened through the design, and the self-weight influence of the steel support is effectively controlled.

The present invention relates to a roof mounting system for roof structures having purlins supported on roof trusses, the roof mounting system including a purlin hanger having at least one purlin support and mounting bracket for securing the purlin hanger to a truss in sliding relation.

The invention discloses a wind-proof photovoltaic support and a construction method thereof, and relates to the technical field of photovoltaic power generation, the wind-proof photovoltaic support comprises a support assembly and a sealing plate, the support assembly comprises a plurality of longitudinal beams, a plurality of purlines and a plurality of waterproof strips, the sealing plate is arranged on the periphery of a roof surface in a surrounding mode, and the sealing plate is arranged on the periphery of the roof surface. The sealing plate is further connected with the photovoltaic panel located on the edge of the roof face in a sealed mode so that the sealing plate can seal a gap between the photovoltaic panel located on the edge of the roof face and the roof face. The gap between the photovoltaic panel located at the edge of the roof surface and the roof surface is sealed by arranging the sealing plate, and airflow is prevented from entering the space between the roof surface and the photovoltaic panel from the gap, so that the probability that the photovoltaic panel is lifted by wind is effectively reduced, and the wind resistance of the photovoltaic panel is effectively improved.

The invention belongs to the technical field of bridge engineering, and particularly relates to a deepwater lock catch steel pipe pile cofferdam construction method which comprises the following steps: construction preparation: delimiting a steel pipe pile cofferdam area; drilling and groove milling are carried out along the steel pipe pile cofferdam area to form a cofferdam groove, and sandy soil is backfilled in the cofferdam groove; a guide device is lowered along the bored pile steel casing, and steel pipe piles are inserted one by one to form a steel pipe pile cofferdam; a plurality of inner supporting systems are assembled; a covering layer is excavated on the inner side of the steel pipe pile cofferdam to the designed elevation; underwater grouting is conducted on the inner sides and the outer sides of the steel pipe piles located in the cofferdam grooves; the multiple inner supporting systems are sequentially lowered to the designed elevation; a gap between each enclosing purlin structure and the steel pipe pile is checked; the bottom of the foundation pit is cleaned, water is pumped layer by layer, and concrete is poured between the enclosing purlin structure and the steel pipe piles till water pumping in the cofferdam is completed; the bearing platform / pier body is constructed, and backwater of the corresponding inner supporting systems is sequentially removed along with construction of the bearing platform / pier body till water flows out of the bearing platform / pier body; and dismantling the steel pipe pile cofferdam.

The invention belongs to the technical field of foundation pit construction, and particularly relates to a foundation pit supporting structure and a construction method thereof.The foundation pit supporting structure comprises a plurality of steel pipe piles arranged in the circumferential direction of a foundation pit at intervals, first lock catches are fixed to the outer sides of the steel pipe piles, Larsen steel sheet piles are arranged between the steel pipe piles, and second lock catches are fixed to the two sides of each Larsen steel sheet pile; the adjacent steel pipe piles and Larsen steel sheet piles are connected in a clamped mode through corresponding first lock catches and second lock catches, surrounding purlins are fixed to the inner sides of the multiple steel pipe piles, and concrete supporting pieces are arranged between the surrounding purlins and the corresponding Larsen steel sheet piles. The steel pipe piles are matched with the Larsen steel sheet piles, so that the rigidity of a supporting system is guaranteed while rapid supporting is guaranteed, and less garbage is generated after dismantling.

The utility model discloses a prefabricated concrete roof structure and a photovoltaic bracket based on photovoltaic building integration; the prefabricated structure includes a prefabricated photovoltaic bracket foundation and embedded anchor bars; the lower end of the embedded anchor bars is embedded in the concrete roof panel, and the upper end is exposed; the prefabricated photovoltaic bracket foundation is a reinforced concrete structure, with embedded parts on the top, and reserved sockets that penetrate the concrete and embedded parts are provided inside, and the upper end of the embedded anchor bars is connected to the embedded parts after being inserted into the reserved sockets; the photovoltaic bracket is assembled by main purlins and secondary purlins through a number of buckling components according to a specific module, and the photovoltaic bracket is fixed on the prefabricated photovoltaic bracket foundation arranged in a matrix. The utility model establishes a standard module for photovoltaic brackets, which is suitable for most mainstream crystalline silicon photovoltaic products, facilitates the integrated molding of building roofs and photovoltaic panels, can solve the problem of mismatch between photovoltaic and civil construction construction periods, and greatly improves work efficiency.

The utility model relates to a lockrand unit, a supporting panel comprising the lockrand unit and a roof structure, and belongs to the field of building structures. The edge locking unit comprises a first folded plate and a second folded plate which are buckled with each other, and a fixing fastener fixed on the roof structure; the supporting panel comprises a first panel, a second panel, an edge locking unit and a protruding part. The roof structure comprises a main steel unit, a purline unit, a supporting bottom plate, a sound absorption unit, a damp-proof unit, a heat preservation unit, a waterproof unit, a supporting panel, a decoration layer keel and a decoration layer which are sequentially arranged from bottom to top. The purline unit comprises a primary purline, a purline supporting plate and a secondary purline, and a lining purline and a lining purline support are arranged in the heat preservation unit. The adjacent panels are fixedly connected through the lockrand units capable of being arranged on the roof structure, the fixing strength of the supporting panels on the roof structure is improved, and then the wind uplift resistance and leakage prevention performance of the supporting panels and the roof structure are improved.

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 auxiliary hoisting device for a roof purline module, which belongs to the technical field of steel structure installation and comprises a hoisting frame, a purline module fixing mechanism and a frame hoisting mechanism. The hoisting frame comprises an I-shaped foundation frame and reinforcing ribs; first lower lifting lugs are respectively arranged at two ends of the bottom surface of the I-shaped foundation frame in the length direction; a first upper lifting lug and a second upper lifting lug are respectively arranged at two ends of the top surface of the I-shaped foundation frame in the length direction; the purline module fixing mechanism comprises a first main rope body detachably connected with the first lower lifting lug, a first branch rope body and a second branch rope body, wherein the first branch rope body and the second branch rope body are detachably connected with the lower portion of the first main rope body. The first branch rope body and the second branch rope body are detachably fixed to the two ends of the side purline of the purline module respectively. By utilizing the auxiliary hoisting tool, the problems that in the prior art, an auxiliary hoisting tool directly hoists a single purline through a hook and is mostly used for hoisting a small-span roof, the purline rotates and shakes, the hoisting speed is low and the like can be solved.

The present application relates to steel structure erection technical field, concretely is a kind of steel beam jacking equipment for steel structure factory building assembly.It includes mainframe, adjusting assembly, adjusting track group;The adjusting assembly of the present application can effectively fix steel purlin and support it on roof, and the adjusting assembly of the present application can adjust the front and back positions of steel purlin, can rotate steel purlin by a certain angle to avoid interference with roof frame during jacking process, can also tilt purlin in a row by a certain angle to adapt to the angle of roof frame, under the support of adjusting assembly, workers only need to adjust purlin to installation position to start installation, and can install multiple purlin at a time, it is convenient and fast, greatly improve installation efficiency;The adjusting track group of the present application can use the support column of original building as reference to accurately position the whole system;The adjusting assembly of the present application can move front and back purlin along its length direction, make its head and tail connection without gap, to ensure its installation accuracy.

The invention discloses a construction method of a multi-layer profile steel enclosing purlin in a steel pipe pile cofferdam, which comprises the following steps of: 1) respectively welding and fixing two ends of a main beam on the top surface of the cofferdam, and respectively completing the connection of a perforation jack, a finely-rolled twisted steel bar suspender, a limiting steel bar nut and the profile steel enclosing purlin at the bottommost layer; and (2) the plunger of the perforating jack falls back synchronously for multiple times, and the profile steel circuit purlin on the bottommost layer is driven to descend for multiple times through the finish-rolled twisted steel suspender till the profile steel circuit purlin on the bottommost layer descends in place and is welded and fixed to the lower portion of the cofferdam. And (3) multiple times of circulation are conducted, and positioning of multiple layers of profile steel enclosing purlins is completed one by one. The construction risk and the construction cost are greatly reduced, the profile steel enclosing purlins can be more conveniently positioned in the steel pipe pile cofferdam, and the safety of the steel pipe pile cofferdam is ensured. According to the method, the construction risk is remarkably reduced, the construction convenience is greatly improved, and the construction quality of the profile steel enclosing purlin can be checked more conveniently.

The invention relates to the technical field of Larsen steel sheet pile construction, and discloses a Larsen steel sheet pile cofferdam construction method suitable for a deepwater area, which comprises the following construction steps: 1) arranging a construction platform; (2) four positioning piles are driven into the construction position to form a construction area; 3) arranging a guide frame in the construction area, wherein the guide frame is provided with a guide arm; (4) a plurality of Larsen steel sheet piles are driven along the guide arms, the bottoms of the Larsen steel sheet piles extend into the solid soil layer, and adjacent Larsen steel sheet piles are arranged in a sealed mode; (5) enclosing purlins are arranged on the pile rows, and steel supports are arranged between the enclosing purlins to form an inner supporting structure; (6) water and sludge in the construction area are sucked till the solid soil layer is exposed at the bottom, and the Larsen steel sheet pile cofferdam is formed by the multiple Larsen steel sheet piles and the multiple inner supporting structures; the bottoms of the Larsen steel sheet piles extend to a solid soil layer and are arranged in a sealed mode, and a plurality of inner supporting structures are arranged, so that the water stopping performance of the cofferdam is improved, and meanwhile the stability and the water flow impact resistance are enhanced.

The utility model belongs to the field of assembly type building roof structures, and provides a combined prefabricated roof structure which comprises cross beams, wall bodies and roof purlins, the cross beams are used for connecting the wall bodies on the two sides, the purlins are arranged on the wall bodies, the cross beams and the wall bodies are integrally formed prefabricated parts, and the roof structure is provided with at least one prefabricated part. The roof structure formed by combining and prefabricating the beams and the walls is adopted, and the problems that according to an assembly type concrete roof structure, the beams and the walls need to be prefabricated and hoisted respectively, then node connection of the beams and the walls is conducted on site, and construction efficiency is low are solved; the beams and the walls in the roof structure are integrally poured and integrally formed in a factory to form the combined prefabricated roof structure, the beams and the walls do not need to be prefabricated and hoisted respectively, beam and wall joint connection does not need to be conducted on site, and the construction efficiency is high; only beams and walls in the roof structure are integrally prefabricated, a pitched roof does not need to be prefabricated, and the weight of the roof and the building cost are not increased.

The present invention belongs to the technical field of foundation pit support, and in particular relates to an anti-collapse support structure for a deep foundation pit, comprising a foundation pit, a plurality of cast-in-place piles fixedly provided at the bottom of the foundation pit, a plurality of purlins fixedly connected to the side walls of each cast-in-place pile, a plurality of inclined anchor rods fixedly connected to each purlin and the side walls of the foundation pit, a retaining wall fixedly connected to the bottom of the foundation pit, and a plurality of active support mechanisms fixedly installed between the retaining wall and the plurality of cast-in-place piles. The present invention can improve the stability of the pile-anchor support, and can actively strengthen the support according to the pressure of soil collapse, thereby improving the anti-collapse performance of the support. At the same time, it can also be automatically triggered in stages to perform collapse buffering protection at the inner outer edge of the foundation pit, which can not only alert on-site personnel, but also reduce the degree of collapse risk and improve safety.

The invention discloses an angle-adjustable steel supporting structure which comprises a steel enclosing purlin horizontally arranged on a steel sheet pile on the inner side of a foundation pit; the steel support is arranged between the steel enclosing purlins on the two sides; the adjusting seats are arranged at the two ends of the steel support; the adjusting seat comprises a fixed seat and a movable seat, the fixed seat is connected with the steel enclosing purlin, the movable seat is rotationally connected to the fixed seat through a hinge shaft, a plurality of layers of arc-shaped adjusting pipes are arranged on the movable seat, an adjusting rod connected to the adjusting pipes in a sliding mode is arranged on the fixed seat, and a U-shaped locking rod is vertically connected to the adjusting pipes in an inserted mode; the adjusting rod is provided with a locking hole for the locking rod to penetrate through. The steel support has the following advantages and effects that the angle-adjustable adjusting seats are arranged at the two ends of the steel support, the included angle between the steel enclosing purlins on the two sides is made up, the steel support can be stably connected with the steel enclosing purlins through the adjusting seats, brackets do not need to be welded or cushion blocks do not need to be installed, rapid construction of the steel support is guaranteed, and the construction efficiency is improved.

The invention relates to a comprehensive construction method for a Larsen steel sheet pile cofferdam of an anti-typhoon cross-sea bridge. The comprehensive construction method comprises the steps that firstly, BIM and VR application is conducted; 2, construction preparation is conducted; thirdly, a first enclosing purlin is installed, and steel sheet piles are driven in an inserted mode; fourthly, steel enclosing purlins and water stops are installed; 5, bottom sealing concrete is constructed; sixthly, the elevator cage is installed; seventhly, a bearing platform is constructed; eighthly, dismantling construction is conducted; ninthly, the steel sheet piles are recycled; and step 10, intelligent monitoring application. The construction challenges caused by complex landforms at the bottom of the foundation are effectively overcome by adopting targeted construction measures, the resistance to typhoon and storm impact is enhanced, corresponding improvement measures are integrated in all construction processes, and positive effects are achieved.

The invention discloses a method and a system for detecting the connection strength of a C-shaped steel purline connecting piece, and relates to the technical field of photovoltaic equipment detection, and the method comprises the following steps: carrying out a connection strength test on an integral structure formed by two C-shaped steel purlines and a steel connecting piece through an external material test end; undetectable internal damages such as subfissure, fatigue and the like of the steel connecting piece are continuously detected through ultrasonic waves in the test process, multiple groups of ultrasonic test data are formed by changing the bolt torque of the steel connecting piece, and data expansion is performed based on the corresponding relation between torque and ultrasonic signals through linear regression in the data processing stage; the full-series corresponding relation between the torque and the ultrasonic signal can be obtained by analyzing the regression coefficient of the corresponding relation, and finally, the occurrence time consumption of the first abnormal wave crest of the ultrasonic signal with the waveform characteristics of subfissure, fatigue and the like is obtained, and the torque corresponding to the first abnormal wave crest with the longest time consumption in all the occurrence time consumption is searched. The torque is the optimal torque of the steel connecting piece.

The embodiment of the invention provides an automatic embracing welding system which comprises a turnover mechanism, a conveying mechanism and welding equipment, the turnover mechanism is provided with a first station and a second station on one side of the first station, and the turnover mechanism can turn a C-shaped purline on the first station to the second station. The conveying mechanism comprises a grabbing assembly which is arranged above the turnover mechanism and can move transversely and a conveying assembly located on one side of the turnover mechanism, the conveying assembly is provided with a stacking station, and the grabbing assembly can grab the C-shaped purline on the first station to the stacking station or can grab the C-shaped purline on the second station to the stacking station. The grabbing assembly can grab the C-shaped purlins on the second station to be stacked on the C-shaped purlins on the stacking station. The welding equipment corresponds to the conveying assembly and can drive the stacked C-shaped purlins to move and conduct welding. The turnover mechanism is in butt joint with manufacturing equipment of the C-shaped purline, the manufactured C-shaped purline is directly conveyed to the automatic embracing welding system, so that the C-shaped purline can be automatically machined into an embracing welding assembly after being produced, the labor cost is saved, and the efficiency is high.

The utility model discloses an integrated structure for vertically arranging steel frame photovoltaic modules on a support, which comprises a fixed column, purlines are arranged at the upper end and the lower end of the fixed column, stand columns are connected to the left sides and the right sides of the purlines and the middle of the fixed column, and purline connecting plates are fixedly connected to the sides, away from each other, of the upper end and the lower end of each stand column. The other end of the purline connecting plate is fixedly connected to the purline; through the purlines, the stand columns, the purline connecting plates, the assembly connecting plates and the steel frames, compared with a traditional aluminum alloy frame, the solar cell pieces can be completely not shielded, the assemblies are vertically arranged on the assembly connecting plates of the stand columns, meanwhile, the assembly connecting plates do not shield the solar cell pieces, and therefore the back faces of the photovoltaic assemblies are completely not shielded; the device can be conveniently driven to adjust the height, so that the power generation efficiency of the photovoltaic module during vertical installation is improved, the device can conveniently penetrate into the ground to be fixed through the spiral ground pile, and the fixing effect of the device and the ground installation is ensured.

The invention discloses a multi-angle prestress back shore structure in a foundation pit and a method for applying prestress to an enclosure. The prestressed jacking structure comprises a telescopic jacking mechanism, wherein the telescopic jacking mechanism is provided with a telescopic jacking end; the telescopic jacking mechanism can swing up and down; a bearing enclosing purlin (21) is arranged at the part, close to the pit bottom, of the enclosure; the telescopic jacking and supporting mechanism can swing to the angle that the jacking and supporting end of the telescopic jacking and supporting mechanism faces the force-bearing enclosing purlin, and the jacking and supporting end of the telescopic jacking and supporting mechanism can stretch out and be jacked and supported on the force-bearing enclosing purlin. The prestress applying method comprises the steps that construction of the prestress back shore structure is completed before subsequent digging operation of a lower layer, and back shore prestress is applied to the enclosure structure (6) through the prestress back shore structure. According to the prestress back shore structure and the prestress applying method, back shore prestress is applied to the portion, close to the pit bottom, of the enclosure on the basis of the horizontal support (41) close to the pit bottom, and displacement deformation of the portion, close to the pit bottom, of the enclosure can be controlled in time.

The present invention provides a fusion mirror roof panel, a roofing structure, and a building. The fusion mirror roof panel comprises: a waterproof plate layer, comprising a first metal plate layer and a first waterproof layer attached to the outer side of the first metal plate layer along the thickness direction of the fusion mirror roof panel; a second metal plate layer, located on the inner side of the waterproof plate layer and arranged opposite to the waterproof plate layer, wherein the second metal plate layer is provided with multiple ribs protruding toward the inside, the ribs extend in a second direction, the multiple ribs are arranged at intervals in a first direction, the first direction is perpendicular to the second direction, and the ribs are used for being in contact with purlins; and a thermal insulation layer, sandwiched between the waterproof plate layer and the second metal plate layer. The fusion mirror roof panel provided by the present invention can be produced and assembled in a factory, thereby reducing the construction procedure, lowering the on-site installation costs, and increasing the on-site construction speed.

The invention relates to an automatic monitoring and adjusting type foundation pit supporting system. Comprising a pump station, a control center, enclosure walls arranged on the four walls of a foundation pit, enclosing purlins arranged on the inner side walls of the enclosure walls, a plurality of horizontal supporting beams oppositely supported between the enclosing purlins, vertical supporting frames arranged in the foundation pit and supported in the middles of the horizontal supporting beams, and displacement sensors arranged in the enclosure walls and used for detecting the displacement amount of the foundation pit walls. The supporting beam comprises a beam body and two hydraulic jacks which are arranged at the two ends of the beam body and stretch out and draw back in the extending direction of the beam body, the hydraulic jacks are connected with the pump station, and the pump station and the displacement sensor are connected with the control center. The prefabricated high-strength supporting beam has the advantages that the supporting axial force can be automatically monitored and adjusted, the prefabricated high-strength supporting beam is provided, and the problems that an existing foundation pit supporting system cannot be monitored and adjusted in real time, and the supporting beam cannot have the advantage of high-strength prefabrication at the same time are solved.

An anchoring bracket that secures a safety line includes a pair of anchoring plates, a ridge cap member, and at least one D-ring connector. Each of the anchoring plates is hingedly connected the ridge cap member on opposite sides thereof and the D-ring connection member is rotatably connected to a top side member of the ridge cap member. Each of the anchoring plates includes first and second leg members having a plurality of boreholes therethrough. The anchoring plates may be opened to be placed on a flat roof or over a roof peak and secured to one or more structural members of the roof, e.g., roof rafters, trusses, joists, or Z-purlins, as well as portions of the roof decking, using appropriate fasteners in accordance with one or more safety regulations or protocols, e.g., local, OSHA, ANSI.

The invention discloses a light-weight high-strength corrosion-resistant composite material photovoltaic support, and relates to the technical field of new materials and new energy, the light-weight high-strength corrosion-resistant composite material photovoltaic support comprises a front stand column and a rear stand column, the front stand column and the rear stand column are pre-buried in a concrete pile to be fixed, the top end is provided with an oblique beam, the oblique beam and the stand columns adopt triangular connecting pieces with partition plate sleeves, and a plurality of purlines are arranged on the oblique beam in parallel; the purlins are fixed to the oblique beams through purlin supports. In order to improve the stability of the support, a front inclined strut and a rear inclined strut are additionally arranged between the stand column and the oblique beam, the inclined struts and the stand column as well as the inclined struts and the oblique beam are connected through triangular connecting pieces with partition plate sleeves, gaskets are additionally arranged at the connecting positions of the stand column, and the triangular connecting pieces for connecting the inclined struts and the oblique beam and purlin supports share a pair of long holes penetrating through the oblique beam. The triangular connecting piece with the partition plate sleeve and the gasket is utilized, so that the pressure-bearing contact surfaces of components such as the stand column and the inclined strut are changed from bolt holes to end total sections, and the pressure-resisting axial force of the inclined beam, the stand column and the inclined strut is greatly improved.

The embodiment of the invention discloses an online quick mounting method for a wall surface system of a steel structure factory building, which comprises the following steps of: (1) determining a ground pre-assembly site, and building a simple assembly platform by using pipes or profiles according to the material condition of the site; (2) wall column positioning lines are drawn on an assembling platform, three wall columns are placed at the corresponding positions of the platform, and the positions where purlins are installed face upwards; (3) wall purlines are installed; (4) mounting straight braces and inclined braces between the purlines; (5) mounting a pipeline bracket on the inner side of the wall column, and fixing the pipeline on the bracket by using a pipe clamp; (6) temporary hoisting holes are formed in the upper and lower ends of the wall columns; (7) two cranes are adopted for turning over and hoisting the whole wall surface system, and the upper end and the lower end are hoisted through balance beams during hoisting; and (8) integral hoisting. According to the method, the on-line operation time can be greatly shortened, and the safety risk is reduced.

The invention discloses a photovoltaic support purlin support member or node bearing capacity testing device, which comprises a testing machine, a base assembly, a first support assembly and a second support assembly, the mounting plate is arranged on the base assembly through a horizontally-arranged center shaft, the mounting plate can rotate around the center shaft so as to adjust the pitching angle of the mounting plate, and the mounting plate is further connected with the mounting plate through an angle adjusting and fixing assembly so as to fix the pitching angle of the mounting plate; the mounting plate is used for arranging a to-be-tested purlin holder component or a node; the upper end of the flexible force transmission assembly is connected with a stretching head of the testing machine, and the lower end of the flexible force transmission assembly is connected with a to-be-tested purlin holder component or a node. Correspondingly, the invention further discloses a method for testing the bearing capacity of the purlin holder component or the node of the photovoltaic support. According to the invention, quick installation of purlin holder members or joints with different sizes and specifications can be met, working conditions in different load directions can be realized, and tests of stretching, bending and composite stress states can be realized.