275results about How to "Improve demolition efficiency" patented technology

The invention provides a construction method for an outer wall socket type plate buckle steel pipe scaffold. The construction method is composed of vertical rods, cross rods, inclined pulling rods and the like. The vertical rods are connected with casing pipes in a socket mode. The cross rods and the inclined pulling rods are connected with an inserting plate through wedge-shaped plug pins in the mode that the rod ends and connectors are clamped into the vertical rods, and wall connecting points are arranged to form a geometric invariant structure system. A hanging buckle type profiled steel sheet is laid on the geometric invariant structure system, and the outer side of the hanging buckle type profiled steel sheet is sealed by hanging a safety net so that the safety net can be used for protection and decoration except structural construction. The construction method comprises the specific steps of construction preparation, prefabricated bolt embedding, concrete pouring, I-shaped steel laying, I-shaped steel fixing, U-steel laying, scaffold building and safe protective net hanging. According to the construction method for the outer wall socket type plate buckle steel pipe scaffold, the modularized design is adopted, the structure is simple and firm, assembling and disassembling are convenient and fast, the cost and the loss are reduced, the pollution is low, and the service life is long.

The invention provides a method of maintenance and lifting for a moving section flue at a converter mouth and belongs to the technical field of equipment lifting. The method includes the steps of firstly, setting a lifting pulley set and a pulley set driving and hoisting device; secondly, distributing lifting steel wire ropes and lifting spots; and thirdly, removing a lifting device for the moving section flue at the converter mouth and the mouth moving section flue. A certain movement and lifting space for the mouth moving section flue and a 360-degree rotation function of a converter are fully utilized in normal production of the converter and the mouth moving section flue, the lifting device is set and used reasonably, and accordingly upper parts of the mouth moving section flue can be moved into a converter feeding span with conveying conditions and large conveying space from the space above the converter mouth without removing the upper parts, the range of replacing and maintaining the mouth moving section flue is narrowed greatly. In addition, the method is fast and safe, removing efficiency is improved, maintenance cost is reduced, and maintenance time is reduced.

The invention discloses a wall dismantling device which comprises a vehicle frame, a driving disc, a linkage frame, a driving motor, a drill bit assembly, an impact hammer and a baffle assembly. The drill bit assembly and the impact hammer are arranged at the front part of the frame, the driving motor is arranged on the frame, and a driving shaft of the driving motor is connected with the drivingdisc; the driving disc is rotationally connected with the linkage frame; the linkage frame is connected with the drill bit assembly and the rear end of the impact hammer; the baffle assembly comprisesa baffle and a jacking assembly; the baffle is arranged above the frame; and the jacking assembly drives the rear portion of the baffle to move upwards. The wall dismantling device is ingenious in structure, the driving disc rotates to drive the drill bit assembly and the impact hammer to do linear reciprocating motion through the linkage frame, when the impact hammer hammers a wall, the drill bit assembly drills the wall surface to damage the structure of the wall surface, the wall surface dismantling efficiency is greatly improved, operation is convenient, the baffle assembly can effectively prevent bricks and concrete of the wall from falling off to damage the internal structure of the device, the service life is prolonged, and the safety is improved.

The invention provides a cast-in-place beam support truss integral dropping and dismounting tool and a construction method thereof. An integral beam support truss is suspended below a box girder through four dismounting tools. Each dismounting tool comprises a suspender, an upper bolster, a lower bolster, a carrying pole beam, an upper fixing bolt I, an upper fixing bolt II, a lower fixing bolt and two jacks. The integral beam support truss can be synchronously dropped to a height suitable for a crane or can be directly dropped on the ground for dismounting under the conditions that a construction site is narrow, land requisition and demolishing are difficult, the terrain is complex, the construction period is short, the working height is limited and the crane can not be in place, so safety risks caused by hoisting at high altitude are prevented; meanwhile, the dismounting efficiency of the support truss is improved. Through the adoption of the cast-in-place beam support truss integral dropping and dismounting tool and the construction method thereof, it only takes three hours to dismount the beam support truss, the dismounting speed is greatly lowered, the crane cost and labor cost are saved, the construction site is reduced, and the effects of energy conservation, emission reduction and environment protection are achieved.

The invention relates to a bridge demolishing construction method and a device thereof. The bridge demolishing device comprises a main support and hoisting systems, wherein the hoisting systems are arranged on all frame bodies, and each hoisting system comprises a pulley block, a hoist, a leading pulley, a lifting appliance and lifting rods. The hoists are arranged at the tail part of the main support and fixedly mounted to a tail crossbeam, the leading pulleys are mounted above a top crossbeam, the pulley blocks are mounted under the top crossbeam and connected with the lifting appliances, the lifting rods are connected with the lifting appliances, casters are mounted on lower steel beams, the casters which correspond to rails move along the rails, and the casters are driven to roll by motors through driving wheel boxes. The bridge demolishing device adopts the hoists as hoisting power, a to-be-cut bridge is fixed through four points, and then the cutting is performed. The cut bridge parts are integral modules, so that the transportation is convenient, the demolishing efficiency is high, and the demolishing construction is safe and reliable. Construction waste formed after demolishing is also integral modules, so that the transportation is convenient.

Disclosed is an environment-friendly dismantling method based on an electric heating method crushing technology. At present, large steel-concrete buildings are dismantled by using large machinery or through directional blasting, huge sound is generated and gravel splatters in the dismantling process, and therefore dangerousness exists. The environment-friendly dismantling method comprises the following steps that firstly, replacement bearing points required in the replacement process are marked on a dismantling site through the preparation process; secondly, through the replacement process, prepared replacement vertical columns are mounted and fixed to the bearing points, and electrodes of the replacement vertical columns are connected with a remote control device through wires; and thirdly, closed electric furnaces are additionally mounted on the peripheries of all the to-be-dismantled vertical columns correspondingly and conduct heating simultaneously, through the heating process, concrete is peeled off, internal steel ribs are softened and chiseled away, finally all the closed electric furnaces and personnel are evacuated, the replacement vertical columns are started through theremote control device, electric heating is conducted, the replacement vertical columns are melted, all the layers of floor slabs collapse by means of the gravity, and thus the dismantling process iscompleted.

The invention discloses a construction method for bent cap hoop support integral detachment. The method includes the following steps that S1, pressure bearing devices are installed; S2, steel wire ropes are installed; S3, first-time stress system conversion is conducted; S4, second-time stress system conversion is conducted; and S5, a support vertically descends to the ground. By the adoption of the construction method for bent cap hoop support integral detachment, through two times of stress system conversion, the hoop support integrally and vertically descends to the ground to be disintegrated and detached, plenty of upper air operation and hoisting lifting operation are reduced, the detaching efficiency of the bent cap hoop support is improved, and safety of constructors is guaranteed.

The invention provides a cylinder sleeve dismounting device. The cylinder sleeve dismounting device comprises pressing devices, friction plates, a base, regulating liner tubes, a pressing nut, a supporting block, a wear reducing device, a rocking bar and a center stud, wherein the center stud is used for sequentially mounting the base, a plurality of pressing device, the pressing nut, the supporting block and the rocking bar from bottom to top; the rocking bar and the pressing nut are both in threaded connection with the center stud; each regulating liner tube is arranged between every two adjacent pressing devices; a cylindrical structure consisting of a plurality of friction plates of which the sections are arc-shaped is arranged at the outer side of each pressing device; the bottom of each friction plate is in contact with the base. The device disclosed by the invention can be used for realizing dismounting of a general cylinder sleeve and also realizing the dismounting of the cylinder sleeve at a condition that the width of a large head of a connecting rod is larger than the inner diameter of the cylinder sleeve; the cylinder sleeve dismounting device is reasonable in structural design and easy to implement.

The invention discloses a non-destructive dismantling method of negative ring segments after a shield machine passes through an intermediate air shaft, comprising the following specific steps: step 1,enabling a segment car for transporting segments and a working platform to be in position, connecting a top segment of a first ring with a special dismantling hanger by a bolt, and then respectivelyremoving connecting bolts between the top segment and adjacent segments; and starting the special dismantling hanger to hang the top segment to the segment car; step 2, repeating step 1, and then dismantling other segments of negative ring segments of the first ring and stacking on the segment car; transporting out the negative ring segments of the first ring by the segment car; step 3, repeatingstep 1 and step 2 for dismantling negative ring segments of other rings in sequence. The non-destructive dismantling method only needs 2 to 3 workers to cooperate to dismantle the negative ring segments, thus saving manpower; at the same time, the workers only need to assist in connecting one segment with a hanging ring assembly or removing the segments from the hanging ring assembly, the workloadis less, the dismantling efficiency is high, and the detached segments are stacked on the segment car to reduce the breakage rate.

The invention discloses an electro-hydraulic hybrid drive double-head breaking and disassembling robot and a breaking and disassembling method, and belongs to the technical field of special robots. The double-head breaking and disassembling robot comprises a bearing reversing system, a breaking and disassembling system and a control system. According to the double-head breaking and disassembling robot, the electro-hydraulic hybrid drive is adopted, and the breaking and disassembling system comprises a drill bit, a prying rod and two working heads; transposition in the circumferential positionof the cross section of a kiln body is completed through rotation of a hydraulic arm and a workbench, transposition in the axis direction of a rotating kiln is completed through linear movement of thedouble-head breaking and disassembling robot, and finally the intelligent and efficient breaking and disassembling of residual refractory bricks of the whole kiln body is achieved by the double-headbreaking and disassembling robot through joint work of the drill bit and the prying rod. The double-head breaking and disassembling robot is small in noise in work and high in working efficiency, andthe kiln body of the rotating kiln can be effectively protected.

The invention discloses a construction method for dismounting a reinforced concrete supporting beam with the assistance of a hydraulic lifting bearing platform. The construction method comprises the following steps: S1, the hydraulic lifting bearing platform is moved to a position right below one segment beam, and a hydraulic lifting device is started to support the segment beam; S2, fixing framesare mounted right below other segment beams, and the segment beams are supported by the fixing frames; S3, the segment supported by the hydraulic lifting device is cut and separated from the reinforced concrete supporting beam; S4, the hydraulic lifting device is started to lay down the segment beam separated from the reinforced concrete supporting beam in step S3; S5, the segment beam laid downin step S4 is removed, the fixing frame close to one side of the hydraulic lifting bearing platform is dismounted, the hydraulic lifting bearing platform is moved to a position right below the segmentbeam above the dismounted fixing frame, and the hydraulic lifting device is started to support the segment beam; and S6, step S5 is repeated till all the segment beams are cut and removed. Accordingto the construction method, the hydraulic lifting bearing platform is adopted as an auxiliary support, thereby achieving the advantage that the dismounting efficiency and safety can be improved.

The invention discloses a demolition construction method for an overpass existing line arch bridge. The demolition construction method comprises the steps: 1, erecting a protective shed frame; 2, carrying out static crushing demolition on the arch blasting demolition structure; 3, manually removing the blasting protection layer; 4, cutting the removed arch ring; 5, hoisting the arch ring to be hoisted; and 6, dismantling the under-arch structure. The method is simple, reasonable in design, easy and convenient to construct and good in using effect; the protection shed frames fixed to the frontside and the rear side of the removed arch bridge are adopted for effective protection, meanwhile, the structure on the arch of the removed arch bridge is removed in the mode that static crushing andmanual chiseling are combined, it is guaranteed that a plain concrete arch ring cannot be damaged in the static crushing process, and an existing spanned railway line cannot be disturbed. After the arch ring is exposed, the removed arch ring is cut and decomposed through a rope saw and then hoisted and removed, then the under-arch structures on the left side and the right side are rapidly removed,the construction period can be effectively shortened, the arch bridge removing efficiency is improved, and the removing process is safe and reliable.

The invention discloses a construction method for dismantling an overwater suspended arch bridge. A seventh span to a twelfth span are dismantled, ninth to twelfth spans are dismantled in a dismantling sequence from the twelfth span to the ninth span through the same process steps as a thirteenth span, sequential hole-by-hole removal is adopted, the distance between a long-arm gun machine and a dismantling hole meets the safety distance, an eighth span and a seventh span are dismounted according to the same process requirements, after the upper structure of each span of an approach bridge is dismantled, corresponding bridge piers are chiseled off, a foundation is enlarged, and scattered rock ballast and concrete materials in a site are cleared away and transported to a muck site so as to provide an operation site for subsequent span bridge chiseling. According to the overwater suspended arch bridge dismantling construction method, operation of mechanical equipment and personnel on an old bridge is avoided, the safety risk of dismantling the old bridge is reduced, the bridge dismantling construction process is simple and clear, operation and popularization are easy, meanwhile, the input amount of the mechanical equipment is small, consumables such as explosives are not needed, and the operation safety of the overwater suspended arch bridge dismantling construction method is improved.

The invention discloses a construction site flat plate die dismantling device. The construction site flat plate die dismantling device comprises a base, the top surface of the base is fixedly providedwith a fixing seat, a telescopic space is arranged in the fixing seat, and a sliding rod is slidably installed on the telescopic space and the top surface of the base; when a flat plate die is dismantled, a first motor is started, the first motor drives a first threaded rod to rotate, the first threaded rod rotates to drive a lifting sliding block to slide upwards, a chain wheel moves upwards when the lifting sliding block slides upwards, the chain wheel moves upwards then the sliding rod can be driven to lift upwards, manual work can be replaced by the equipment for dismantling the flat plate die of a ceiling, the safety of workers can be protected, the flat plate die after dismantling can be directly connected without being stacked on the ground at will, the connected flat plate dies are collected together, subsequent processing is facilitated, and the tidy and the safety of the construction site are guaranteed.

The invention provides a static crushing structure for removing concrete and a construction method thereof. The static crushing structure comprises a concrete structure and a steel bar structure poured into the concrete structure. The static crushing structure further comprises an embedded pipe set embedded in the concrete structure, wherein the embedded pipe set is composed of a plurality of embedded pipes, and the pipe orifices of the embedded pipes are exposed out of the concrete structure. Since the embedded pipes are embedded in the concrete structure, when the concrete structure is removed, a worker just needs to pour an expanding agent into the embedded pipes and then add water into the embedded pipes, and then the interiors of the embedded pipes can be made to expand rapidly. Under the effect of the expanding static force, the concrete structure can be stripped from the steel bar structure slowly, and thus the problems that in the prior art, the number of static crushing procedures is large, and the cost is high are solved.

A method for dismantling a discarded jacket through air bags comprises the following steps: 1, dismantling preparation is performed on the discarded jacket; 2, a plurality of air bag groups are lowered into water and are connected to form a whole air bag floating aiding unit; 3, the air bag floating aiding unit and a local control panel arranged at the top of the discarded jacket are connected, so that the remote control panel can realize controlling and monitoring functions; 4, the air bag floating aiding unit is inflated to be in a pressure maintaining state; 5, a workboat is connected with the discarded jacket and tows the discarded jacket away from the site. The method has the advantages that the dismantling efficiency can be improved greatly and the dismantling cost is reduced; the offshore construction risks are reduced; meanwhile, the completeness of the discarded jacket can be kept, the construction risks caused by jacket disassembly are reduced, and the air bags are recyclable, so that the engineering cost can be reduced substantially.

The invention discloses a horizontal supporting structure for building construction and a method for installing the same. The horizontal supporting structure comprises a triangular frame and at least two inserting and connecting mechanisms arranged on the triangular frame. The triangular frame comprises a vertical rod, a transverse rod and an oblique rod, a right-angled triangle is defined by the vertical rod, the transverse rod and the oblique rod in an enclosed mode, the inserting and connecting mechanisms are fixed on the vertical rod, and all the inserting and connecting mechanisms are located in the same vertical direction. Each inserting and connecting mechanism comprises two supporting plates and two guide plates, wherein an elastic assembly is arranged between the two guide plates, and the ends, away from the supporting plates, of the two guide plates are hinged to each other. Each inserting and connecting mechanism further comprises two movable plates which are hinged to vertical edges of the two corresponding guide plates respectively, and torsional springs are arranged at the hinged positions. The inner side of each supporting plate is provided with a guide groove, each guide groove is parallel to the bottom edge of the corresponding supporting plate, and each movable plate is provided with a guide post matched with the corresponding guide groove. Mounting and dismounting efficiency can be improved effectively, meanwhile, reuse of the triangular load-bearing supporting structure is facilitated, cost is lowered effectively, and resource waste is prevented.

The invention provides a portable integrated electric inflatable tent bag which comprises a bag body, a folded tent body, a one-piece sleeping bag, a control circuit, an electromagnetic valve, an electric pumping two-way air pump, a storage battery, a tent top lamp and a head top lamp. The whole bag type integrated structure is adopted, an electric inflating and deflating system formed by the electric pumping two-way air pump, the storage battery and the like is utilized, in the inflation process, small air cushions arranged in the bottom of a tent swell fast to form an air mattress, the small air cushions swell to form peripheral air walls in a resulting force mode, the side face and the one-piece top are expanded to support the tent, and therefore the purpose of automatically and fast inflating and supporting the tent can be achieved; when the tent is collected and deflated, the purpose of fast deflating and automatically and fast collecting the tent can be achieved. The portable integrated electric inflatable tent bag has the functions of the one-piece sleeping bag, a tent top lamp power port, a head top lamp charging interface and the like; the putting-up and collecting efficiency is high, carrying and use are convenient, the structure is simple, the size is small, the heat-preserving effect is good, the appearance is attractive, use is wide, and the tent bag is suitable for various occasions such as field camping.

The invention discloses an orthopedic limb gypsum cutting device, comprising fastener strip I, fastener strip II, fixing barrel I, and fixing barrel II; one end of the fixing barrel is provided with an end cover that is provided with a guide groove; one side of the lower portion of the fixing barrel I is provided with the fixing barrel II; one end of the fixing barrel II is provided with an end cover that is provided with a guide groove; lugs are fixed to the two ends of the fixing barrels I and II and are connected via nuts; one side of the end cover is provided with the fastener strip I; oneend of the fastener strip I is provided with a handle; one side of the fastener strip I is provided with the fastener strip II; one end of the fastener strip II is provided with a handle; the fastener strip I and the fastener strip II are connected via a pin; one end of the pin is provided with a bearing positioned in the guide groove; the inner side of each of the fastener strips I and II is provided with a plurality of evenly arranged saw teeth. Gypsum scissors are limited in a fixed movement range via the fixing barrel I and the fixing barrel II, secondary injury to a patient due to slipping of the gypsum scissors during gypsum removal is avoided, and removal efficiency is improved.

The invention discloses a brake disc connection structure for a water-cooled brake. The brake disc connection structure comprises a driving disc meshing with a gear hub. Brake discs are arranged on the two sides of the driving disc and are called the left brake disc and the right brake disc. The left brake disc and the right brake disc are of a regular polygon structure. Connection structures are arranged on all opposite side edges of the left brake disc and the right brake disc. Each connection structure comprises a locating column, a guide column, a guide groove and a locating plate, wherein the locating column is fixedly arranged on the right side face of the left brake disc in the axial direction, the guide groove is formed in the left side face of a right locating disc in the axial direction, the locating column protrudes from the left brake disc rightwards, and the right end of the locating column goes deep into the guide groove; the guide column is fixedly connected to the right end of the locating column; the locating plate is arranged at the groove opening of the guide groove, and the locating plate is connected with the right brake disc detachably and fixedly; and the locating plate is provided with a locating hole, and the locating column penetrates though the locating hole. According to the brake disc connection structure, the installation and maintenance efficiency is high, and a large number of manpower and material resources are saved.

The invention relates to a device for dismantling a junction box of a crystalline silicon photovoltaic component and a method for dismantling the junction box of the crystalline silicon photovoltaic component. Based on an original dismantling method, great improvements have been made on the method and device for dismantling the junction box of the crystalline silicon photovoltaic component; in order to reduce the damage of the component and improve the dismantling efficiency of the junction box, an operation platform surface of the device has a position identification function, a wire cuttingdevice is firstly adopted to cut off redundant wires at the rear part of the junction box so as to facilitate the direct recycling of the redundant wires; in addition, a mechanical scraper blade is adopted, cutting edges on the left side and the right side of the mechanical scraper blade respectively enter an adhesive layer bonded between the junction box and the component from the two sides of the junction box, and adhesive bonded between the junction box and the component is cut by the sharp cutting edges, so that the junction box is cut off in a complete state, and a component laminate is kept to be in a good state without damage; and the junction box can be preheated if needed to soften silica gel, so that the junction box is easier to dismantle.

The invention relates to the field of acrylic board for curtain wall splicing, in particular to an acrylic board for curtain wall splicing. The acrylic board comprises a first clamping board, a secondclamping board, a blocking mechanism, a sliding rod, a sliding groove, a compression spring, a first protrusion, a second protrusion, a reset spring, a clamping block, a clamping groove, an abuttingspring, a connecting mechanism, a first connecting rod, a second connecting rod, a stretchable mechanism and a pull rod. When the second clamping board and the second connecting rod are inserted, thesliding rod can abut against the side wall inside the second clamping board to move upwards, and therefore the sliding rod abuts against the second protrusion to drive one end of the clamping block toabut against the interior of the clamping groove, internal blocking of the second clamping board and the second connecting rod is achieved, the first clamping board and the second clamping board areprevented from being disengaged, and meanwhile, the installing efficiency is improved. When disassembling is needed, by pulling the first clamping board and the second clamping board, the first protrusion at the side wall of the sliding rod can move by disengaging the compression spring, the first protrusion is moved to the top of the second protrusion, the clamping block is disengaged from the clamping groove under the effect of the reset spring, and therefore disassembling can be performed conveniently.

The invention relates to the technical field of gearbox assembling, and particularly discloses a disassembling device. The disassembling device comprises a disassembling body, a driving part and at least two clamping jaws. The middle of each clamping jaw is rotationally arranged on the disassembling body. The driving part is configured to drive the clamping jaws to rotate relative to the disassembling body so that the clamping jaws can be clamped to a part to be disassembled. By arranging the at least two clamping jaws on the disassembling body, the middles of the clamping jaws are rotationally arranged on the disassembling body, when the disassembling device is in use, the disassembling device is inserted into an inner hole in a bearing end cover, the driving part is used for driving theclamping jaws to rotate relative to the disassembling body so that the clamping jaws can be clamped to the stepped surface of the bearing end cover, then, the disassembling body is pulled outwards, the disassembling device is made to move in the axis direction, and the bearing end cover can be disassembled from a gearbox shell. The disassembling device is simple in structure, convenient to operate, high in disassembling efficiency and capable of avoiding the phenomenon that the gearbox shell is damaged by non-uniform force exertion.

The invention discloses a method for disassembling and modifying a printed circuit board based on high temperature steam, which is implemented by using a reaction kettle with a rotary agitator through the followings steps: 1, setting the heating temperature according to the substrate materials of the circuit board and the tin-soldering component used in the circuit board, and setting the rotating speed and rotating time of the rotary agitator; 2, imbedding the circuit board into the reaction kettle, and fixing the circuit board at the rotary agitator; 3, heating the circuit board in the reaction kettle by using high temperature steam produced by a closed high temperature steam generator, and starting the rotary agitator; and 4, when the rotary agitator stops, stopping heating, then cooling the circuit board. In the method disclosed by the invention, the heating is performed by using steam in a closed environment, and the disassembling of components is implemented through applying mechanical forces which are easy to realize and wide in applicability; meanwhile, the substrate materials of the circuit board are subjected to heat treatment and modification so as to reduce the mechanical strength of the substrate material and destroy the structure of the substrate material, thereby facilitating the subsequent separation and recycling of the circuit board. The method disclosed by the invention has the characteristic of quick disassembling speed and is easy in implementation.

The invention discloses a method for conveying demolition waste materials obtained through overhaul of a dry quenching boiler. The method is characterized by comprising the following steps of 1, making a discharging chute; 2, erecting an integral scaffold operating platform; and 3, connecting and mounting the chute. When the chute is mounted, a small-size device below an air cap is demolished, so that the chute passes through the air cap; a through discharging channel can be formed from the demolition point on the upper portion to the ground on the lower portion; and after entering the discharging chute, the waste materials are directly dumped to a waste material piling-up platform or the ground, and thus the effect that the waste materials are conveyed to the waste material piling-up platform or the ground from the demolition point in a one-step manner is achieved. The method for conveying the demolition waste materials obtained through overhaul of the dry quenching boiler has the beneficial effects that demolition efficiency of dry quenching overhaul is greatly improved; and on the premise that quality and safety are guaranteed, the demolition period can be shortened to a great extent.

The invention discloses an anti-theft door breaking method by using freezing pressure of water and low-temperature cold brittleness of a steel plate. By determining the reasonable water injection position, strong restraint conditions are formed in a door body, and a water injection device is connected to perform water injection operation on an upper water injection hole and a lower water injectionhole respectively; liquid nitrogen is injected into the upper part and the lower part to form closed ice walls on the upper part and the lower part in the door body; according to the freezing critical point below the upper water injection hole at the critical position of frosting outside the door body steel plate, a second operation hole is constructed; water and liquid nitrogen are injected to the middle spaced space through the second operation hole, icing compression is thus formed in the middle closed area to enable the steel plate to be expanded and cracked and deformed, a door body lockpoint is separated from a door frame, and breaking is completed. The method mentioned in the invention can be executed by two rescue workers, wall breaking and door body cutting are not needed in thecase of rescue, the operation is safe and efficient, and the breaking efficiency is greatly improved.

The invention provides a dismounting method for a basic steel pipe pile of an offshore wind turbine. The dismounting method comprises the steps of fixing a to-be-dismounted steel pipe pile, reinforcing soil around the fixed steel pipe pile,, cleaning the inside of the steel pipe pile, and cutting the cleaned steel pipe pile. The to-be-dismounted steel pipe pile is fixed, so that the steel pipe pile can be stabilized in the subsequent cutting process; the soil around the steel pipe pile is reinforced, so that the sand-casting phenomenon in the cutting process can be prevented, and the safe cutting process is guaranteed; and the inside of the steel pipe pile is cleaned, so that the situation that the eyesight is influenced by impurities such as concrete in the steel pipe pile in the cuttingprocess can be prevented. According to the dismounting method, the construction safety can be guaranteed, and the dismounting efficiency is high.

The invention discloses a classified dismantling method for a waste building. The method comprises the following steps that metal doors, metal windows and metal hanging ornaments on the building are demolished; the building is pushed down by using an excavator; a cutting machine is used for spraying water mist and cutting the building at the same time, and the building is cut into a plurality of independent and disconnected blocks; a shovel head on the excavator is dismounted, and is replaced with a breaking head, then the blocks are broken into particles and a steel bar net rack through vibration by means of the breaking head, wood and plastic are separated through vibration, and the wood and the plastic are collected separately; the steel bar net rack is taken from a particle pile, the steel bar net rack is impacted by by utilizing water flow with the pressure of 20Mpa, residual cement particles on the steel bar net rack are shaken off, the steel bar net rack is blown to be dry by utilizing air flow, and then the steel bar net rack is compressed into a metal ingot; and a cable and a data cable are taken out of the particle pile, collected and then placed under an extruding machine to be extruded, and cement blocks adhering to the cable and the data cable are smashed.

The invention relates to a building construction formwork dismantling method. A bottom plate, a moving device, a dismantling device and stretching devices are included, wherein the moving device is arranged at the lower end of the bottom plate; and the stretching devices are symmetrically arranged at the left end and the right end of the upper end face of the bottom plate and symmetrically mounted on the inner side of the dismantling device. The building construction formwork dismantling method can solve the following problems that in the actual operation process of an existing building construction formwork dismantling method, a building construction formwork is dismantled manually, the mechanical strength is large, dismantling is difficult, and consequently the dismantling efficiency is low; and b, manual dismantling is adopted, the input labor force is large, the building construction formwork needs to be supported manually in the dismantling process, and certain harm may be caused to the personal safety of dismantling workers.