44results about How to "Does not affect the force" patented technology

The invention discloses a PCC (Large Diameter Pipe Pile by using Cast-in-place Concrete) energy pile. The PCC energy pile comprises a PCC pile, a heat conducting liquid, a cover plate, a bottom plate, a heat conducting pipe, a heat collecting device and an inspection channel, wherein the bottom of the PCC pile is fully closed; a cover plate with holes is arranged at the top of the PCC pile; prepared holes are formed in one side at the upper part of the PCC pile; the heat conducting liquid is filled up in a cavity in the PCC pile; the heat conducting pipe penetrates through the holes in the cover plate and extends into the heat conducting liquid in the cavity in the PCC pile; the heat conducting pipe extending into the cavity in the PCC pile can adopt opened and closed modes; the inspection channel is formed in the side wall of the PCC pile; and the heat conducting pipe is led out of the cavity in the PCC pile through the holes in the cover plate or the inspection channel and connected with the heat collecting device to form a circulating channel of the heat conducting liquid. The invention further discloses a manufacturing method for the pile. The manufacturing method comprises the technical steps as follows: pouring the PCC pile; excavating pile core soil; making a bottom plate; mounting the heat conducting pipe and the cover plate; filling the heat conducting liquid; and starting a ground heat pump for forming a loop. The PCC energy pile is convenient to overhaul and maintain, wide in application range and low in construction cost, does not influence the bearing capacity, and is an economic, efficient, energy-saving and emission-reducing pile.

The present invention discloses a true triaxial test ultrasonic wave and acoustic emission testing system. According to the present invention, a true triaxial test apparatus has six sides of pressurization units, wherein ultrasonic wave and acoustic emission coupling test transducers are arranged between every side of the pressurization unit and corresponding surfaces of rock, a communication terminal of at least one ultrasonic wave and acoustic emission coupling test transducer is connected with a signal output terminal of a multi-channel ultrasonic wave defect detector, communication terminals of other ultrasonic wave and acoustic emission coupling test transducers are respectively connected with a signal input terminal of the multi-channel ultrasonic wave defect detector and a signal receiving terminal of an acoustic emission instrument through signal shunts, and the acoustic emission instrument and the multi-channel ultrasonic wave defect detector are connected with a computer. With the present invention, an ultrasonic wave test and an acoustic emission test can be performed on the same rock, completely comprehensive data information can be provided for understanding of deformation and breaking law, and mechanics mechanism of the rock, and adverse affects on test results by difference of different blocks can be avoided.

Disclosed is a large-span truss hydraulic multi-point synchronous lifting construction method. The construction method includes the steps of lifting point selection, calculation of load power of each lifting point position, upper and lower anchor point arrangement of a truss, lifting device selection, calculation of overall lifting conditions, lifting trial and steel truss lifting. Deformation caused by truss lifting can be reduced by adopting the flexible steel strand hydraulic synchronous lifting technology, reasonably selecting lifting point positions and utilizing an original structure to serve as upper and lower anchor points for lifting as much as possible; after assembled on the ground, components are integrally lifted to a preset position to be assembled in place; the large-span components can be synchronously integrally lifted at ultra-high altitude, high-altitude operating quantity can be reduced, quality can be improved, workload can be reduced, labor is saved, convenience in mounting and demounting is achieved, stress bearing is unaffected, cost is lowered, funds are saved, duration of work is shortened, and difficulty of safety protection is remarkably reduced.

The invention discloses a pier top displacement spring limiter for a high-pier bridge. Stiffening steel plates are respectively arranged on a stand column or the lateral side of a cover beam and the bottom of a main beam; the stiffening steel plates are connected with the stand column or the cover beam, and the main beam through bolts; a plurality of springs are arranged between vertical stiffening steel plates anchored on the stand column or the lateral side of the cover beam; the other ends of the springs are fixed on the same steel plate, and a certain clearance is reserved between the steel plate and a steel plate anchored on the main beam to play a limiting role when the longitudinal displacement of the pier top is too large; the connection between the stiffening steel plate and the cover beam as well as between the stiffening steel plate and the beam bottom is designed according to anchoring requirements. When the displacement of the pier top is too large, soft collision can enable the springs to deform and consume energy so as to reduce and limit the displacement, the accumulated effects can be reduced and limited, and the phenomenon that because the accumulated displacement of the pier top is too large, the stress of the pier is adverse can be avoided; besides, the performance of the pier top displacement spring limiter can be adjusted through the adjustment of the width of the clearance and the category of the springs.

The invention discloses a method and a device for measuring a cable force. The device comprises a pin shaft and an ear plate, wherein an axial through hole is arranged in the axial axle wire of the pin shaft, two ends of the axial through hole are respectively and symmetrically provided with a transmitting end and a receiving end of an optical measurement system, a measurement plane of the optical measurement system is coplanar with the axial axes of the pin shaft and the action direction of load, and the ear plate is provided with a limit device to be connected with the pin shaft. On the basis that the pin shaft has the characteristics of being even in material and completely and linearly elastic under the stress state, the cable force of an inhaul cable is confirmed by the measurement of the tinny deformation of the pin shaft of a connecting node under the action of the cable force and the linear relationship between the cable force and the deformation. The method and the device provided by the invention are nondestructive testing technologies, thereby being wide in application range.

The invention provides an air guide plate assembly and an air conditioner with the air guide plate assembly. The air guide plate assembly comprises a first air guide plate (10) and a second air guide plate (20), wherein the first air guide plate (10) and the second air guide plate (20) are oppositely arranged, the air guide plate assembly further comprises buffer parts (30) arranged between the first air guide plate (10) and the second air guide plate (20), the first air guide plate (10) and the second air guide plate (20) are connected through the buffer parts (30), and the buffer parts (30) are made of elastic materials. According to the air guide plate assembly and the air conditioner with the air guide plate assembly, the problem that operation of an air conditioner in the prior art is unreliable because of deformation of an air guide plate assembly of the air conditioner is solved.

The invention discloses a crane lifting mechanism belonging to the technical field of cranes. The crane lifting mechanism mainly comprises a winding drum and a fixed pulley block, wherein the winding drum is rotatably installed on the upper end surface of a frame through two bearing seats; the fixed pulley block is connected with a hook component through a rope; one end of the rope is fixed on the winding drum; the lifting mechanism also comprises a pulley beam for installing the fixed pulley block; and the pulley beam is installed on the upper end surface of the frame. In the invention, by changing the installing position of the fixed pulley block, the fixed pulley block can be maintained conveniently, and simultaneously, the lifting height of a heavy object is increased.

The invention discloses a double cross arm independent front suspension of an equation type racing car and a method for controlling the linear rigidity thereof, the suspension comprises an anti-roll rod (1) arranged on a frame (25), both ends of the anti-roll rod (1) are connected with connecting blocks (4) through long rods (3), the connecting blocks (4) are connected with a front suspension pushrod (20), the front suspension push rod (20) is connected with a front upright post (19), and the front upright post (19) is matched and connected with a front suspension wheel edge (21) so as to achieve the connection of two independent front suspensions. Three spring connecting rods (5) are arranged between the two connecting blocks (4), a third spring (6) with a damping spring (7) is arrangedat the middle part of the three spring connecting rods (5), and the third spring (6) is fixed on the frame (25). According to the invention, an interconnection mechanism with the third spring is designed to achieve the relatively independent adjustment of the linear rigidity and roll rigidity of the suspension, so that the car body is more stable when wheels jump, and the operation stability of the whole car can be improved.

The invention provides a test device and test method for simulating contact surface seepage coupling characteristics, and belongs to the technical field of earth and rockfill dam construction.The testdevice comprises a test cavity defined by a cylinder body, a top cover and a bottom plate, and the test cavity comprises an original graded soil sample cavity and a pressure cavity formed in the periphery of the original graded soil sample cavity in a sealed mode; the original graded soil sample cavity and the pressure cavity are separated through an elastic sealing layer, a rotating concrete shaft is arranged in the middle of the original graded soil sample cavity, and the concrete shaft is connected to a secondary speed reducer through a horizontal belt transmission device and then connected to a motor with the adjustable rotating speed. An upper permeable plate and a lower permeable plate for accurately simulating seepage characteristics are respectively arranged at the upper end and the lower end of the original graded soil sample cavity. The problems of high loading torque, difficult coupling loading, difficult water stopping and the like faced by the test device for simulating the stress deformation seepage coupling characteristic between the original graded gravel soil core wall material of the earth and rockfill dam and the bank slope contact surface are solved, and the problems of small geometric dimension of existing equipment and poor accuracy of obtained test data are avoided.

The invention provides a strengthened pivoted window of a curtain wall, which comprises a fixed frame and a top-hung pivoting sash. The strengthened pivoted window of the curtain wall is characterized by further comprising a strengthening limiting device which comprises a locking point, a sliding rod and a limiting block for limiting running track of the locking point. The limiting block is arranged on a side frame of the fixed frame, the sliding rod is arranged in a C-shaped groove on the lateral side of the sash, and the locking point is arranged on the sliding rod and moves in a limiting track of the limiting block. The strengthened pivoted window of the curtain wall is simple in construction, time-saving and labour-saving, low in cost, long in service life, firm in strengthening and good for popularization and application.

The invention discloses a stagger anchoring arrangement mode for overlong prestress steel cables and a construction method. A plurality of prestress short cables are included, the multiple prestress short cables are alternately distributed at the two sides of the position of the center cross section of a pier top, and one end of each cable is fixedly anchored on the cross section of an original cantilever end, and the other end of each cable is fixedly anchored on the cross section of the pier top at the opposite side of the cantilever end; and the ends, on the center cross section of the pier top, of the multiple prestress short cables are partially overlapped to form a stagger anchoring area of overlapped anchoring on the pier top. According to the stagger anchoring arrangement mode for the overlong prestress steel cables, the prestress steel cables are reasonably arranged and anchored, the long cables are properly changed to the short cables, and since prestress loss is closely linked to the length of the prestress steel cables, the prestress loss, caused by friction between steel strands and pipeline walls, looseness of steel bars and the like, of overlong prestress steel cables is decreased greatly, and therefore the mid-span deflection caused by the excessively large prestress loss is decreased.

The invention discloses a sectional type concrete pre-buried screw rod capable of being taken out and a using method thereof. The pre-buried screw rod comprises a screw rod body, the screw rod body comprises an unthreaded rod section and a large-threaded section, and the unthreaded rod section and the large-threaded section are designed in split; a second through hole is formed in the center of the large-threaded section in the axial direction, a plurality of through holes are formed in the large-threaded section in the radial direction, and a connection part is installed on the inner wall of the large-threaded section; the unthreaded rod section comprises a split shear resisting section and a filling section, a counter bored hole is formed in the center of the shear resisting section in the axial direction, and a first through hole is formed in the center of the filling section in the axial direction; and the counter bored hole, the first through hole and the second through hole form a cavity, a connecting rod connecting the shear resisting section, the filling section and the large-threaded section into a whole is installed in the hole, one end of the connecting rod is provided with a boss, and the other end of the connecting rod is in threaded connection with the second through hole. The sectional type concrete pre-buried screw rod can be taken out of concrete and recycled, and liquid of silica gel and the like can be injected to increase friction force between bolts and the concrete.

The invention discloses a vehicle frame structure with novel supporting leg seats and supporting legs. The supporting legs, supporting leg oil cylinders and the supporting leg seats are arranged in the space between the upper plane of a vehicle frame and the lower plane of a rotary table and can completely retract in the space between the rotary table and the vehicle frame or can rotate out of thespace between the rotary table and the vehicle frame, and the vehicle frame is supported. The supporting leg seats are placed on the upper portion of a vehicle frame body and not occupy the space inthe front-rear direction of the vehicle frame body so that the spatial size can be fully used for structural design of the vehicle frame body, and the bearing capacity of the vehicle frame and a crawler frame is optimized to the maximum degree. The supporting leg seats are placed in the space between the vehicle frame and the rotary table, the idle space is effectively used, and the structural design is more compact. The supporting leg seats, the supporting legs and the supporting leg oil cylinders are rotationally placed in the height space between the vehicle frame and the rotary table, thesize in the front-rear direction is strictly controlled within 2.55 m, and the transportation width size of a main machine meets the requirements of transportation laws and regulations to the maximumextent.

The invention discloses a fall prevention device for a lifting scaffold. The fall prevention device includes a scaffold body and a fall prevention wheel; a plurality of radial support lugs are arranged at the outer edge of the fall prevention wheel; the fall prevention device is characterized by further including sliding blocks mounted on the fall prevention wheel or the radial support lugs, sliding grooves are formed in the fall prevention wheel or the radial support lugs and are strip-shaped grooves, the length direction of the sliding grooves is arranged along the radial direction of the fall prevention wheel, the sliding blocks are mounted on the fall prevention wheel or the radial support lugs through the sliding grooves, and when the fall prevention wheel rotates, the sliding blockscan slide in the length direction of the sliding grooves; the fall prevention device further includes a baffle block mounted on the scaffold body, and in the process that the sliding blocks rotate along with the fall prevention wheel, when the rotation speed of the fall prevention device is greater than a preset threshold value, the baffle block partially or completely falls in the motion trajectory of the sliding blocks; when the sliding blocks and the baffle block interacts with each other, the baffle block exerts resistance for impeding further rotation of the sliding blocks on the slidingblocks. The fall prevention device for the lifting scaffold is simple in structure and reliable in performance.

The invention belongs to the technical field of bridge wind-induced vibration control, and provides a semi-active vibration absorption and energy dissipation control system for restraining vortex-induced vibration of a bridge. Compared with a traditional tuned mass damping system, the semi-active vibration absorption and energy dissipation control system has the advantages and characteristics that (1) springs are horizontally placed at the bottom of a beam, and the lengths of the springs are not limited, so that the frequency requirement of a low-frequency target can be met; (2) different target frequencies can be realized through different combinations of the multiple springs connected in series and in parallel, so that the multi-order vortex vibration control requirement is met; (3) the springs made of fiber reinforced nylon materials are adopted, and the springs are slotted, so that the frequency implementation range can be greatly widened; (4) materials and forms of a mass body are not limited, and a water bag can be adopted, so that cost is low, and disassembly, assembly and mass adjustment are convenient; (5) coaxial pulleys with different diameters are adopted, so that the high-frequency vibration control efficiency can be obviously improved; (6) vibration of the mass body is controlled through manual semi-automatic intervention, and higher control efficiency is achieved; (7) the device is small in volume and is mounted at the bottom of the beam without influencing the appearance basically; and (8) the engineering cost is greatly reduced.

The invention discloses a pipeline side settlement prevention system for a soft soil foundation and a construction method. The pipeline side settlement prevention system for the soft soil foundation comprises a pipeline, a structure pool wall, a structure bottom plate, a concrete base plate and a sand foundation, one end of the pipeline penetrates through and is fixed on the structure pool wall, one end of the structure bottom plate extends out of the outer surface of the structure pool wall to form an overhanging scaffold, the concrete base plate is located under the pipeline, one end of theconcrete base plate is fixed to the overhanging scaffold, and the sand foundation is located above the concrete base plate. The concrete base plate has certain strength and rigidity, and one end of the concrete base plate is fixed to a structure, so that differential settlement of a soft soil foundation pipeline and the structure can be coordinated by means of the strength and rigidity of the concrete base plate, and the problems of flexural joint damage, pipeline tension fracture, water leakage and the like caused by differential settlement of the pipeline at the joint of the pipeline and thestructure are effectively solved.

The invention discloses a construction method of a fabricated building mixed tower crane. The construction method involves a mixed tower crane applied to a tower crane foundation and comprises the following steps of installing a large tower crane embedment and a small tower crane embedded part on the tower crane foundation, and enabling the upper ends of the large tower crane embedment and the small tower crane embedment to extend above the tower crane foundation; sequentially outwards arranging a tower crane foundation outer cantilever plate and post-cast expansion concrete on the outer sideof the tower crane foundation; pre-embeding water stop steel plates between the tower crane foundation and the tower crane foundation outer cantilever plate as well as between the tower crane foundation outer cantilever plate and the post-cast expansion concrete; and a garage raft foundation is arranged on the outer side of the post-cast expansion concrete. According to the construction method, alarge tower crane and a small tower crane are arranged on the tower crane foundation, and meanwhile the protection effect on the large tower crane and the lower tower crane can be realized when the large tower crane embedment and the small tower crane embedded part are not needed.

The invention provides a tower crane foundation located on a foundation pit slope and a construction method thereof. The tower crane foundation located on the foundation pit slope comprises foundationbolts, a top plate, a second layer of column, an interlayer plate, a first-layer column and a plate-type foundation; the plate-type foundation is located on the bottom face of a main building foundation pit, and the first-layer column, the interlayer plate, the second-layer column and the top plate are sequentially arranged on the plate-type foundation; and the foundation bolts are pre-buried inthe second-layer column and the top plate and used for fixing a tower crane. According to the tower crane foundation located on the foundation pit slope and the construction method thereof, a plate-column shear wall structure is connected on the basis of the plate-type foundation to form a tower crane foundation body, the tower crane foundation body is arranged on the bottom face of the main building foundation pit, the construction is easy and convenient, and the tower crane foundation is safer and more economical.

The invention relates to a shield tunnel model test device which comprises a model tunnel, simulated soil, a model box, a tunnel deformation test system and other test instruments. The model tunnel is formed by splicing a plurality of model tunnel segments; the model box is formed by splicing a stand column, a model box front baffle plate, a model box rear baffle plate and an organic glass plate; the tunnel deformation testing system is composed of a displacement meter, a tunnel displacement reference rod, a signal acquisition instrument, a reference rod fixing support and a sliding rail. The other testing instruments comprise a soil body top surface settlement reference rod, a soil body top surface settlement dial indicator, a miniature soil pressure gauge and a miniature pore water pressure gauge. The model tunnel has the beneficial effects that the model tunnel is formed by splicing the model tunnel segments, the model tunnel segments are manufactured completely according to the appearance characteristics of the actual tunnel segments, and the model tunnel formed by splicing the model tunnel segments is consistent with the actual tunnel in the aspect of stress deformation.

The invention discloses a tubular pile type fence structure applied to deep sea culture and a mounting method of the tubular pile type fence structure. The fence structure comprises a platform, a plurality of outer pile columns and inner pile columns which are vertically welded to the bottom face of the platform, a fence assembly, a sealing assembly, a fastening assembly and a winch. The enclosure assembly comprises an outer enclosure net, an inner enclosure net, netting ropes, fixing ropes arranged between every two adjacent netting ropes in a winding mode, and a plurality of fixing rings welded to the outer pile column and the inner pile column. The sealing assembly comprises a plurality of sets of bottom nets, chains, fixing rods and winding and unwinding ropes fixedly connected to the corresponding fixing rods. Each fastening assembly comprises a base block, a vertical through hole, a horizontal through hole, a fastening chain and a bolt, wherein the vertical through hole and the horizontal through hole are formed in the corresponding base block. By means of the fence structure, the problems that when an existing fence for deep sea aquaculture is constructed and maintained, the netting installation difficulty is large, net replacement is difficult, the repairing difficulty is large, and the maintenance cost is high are solved.

The invention discloses a self-explosion type concrete support and a dismantling method thereof. The support comprises an internal steel bar and concrete combined with the steel bar, wherein a static explosive is arranged on the steel bar in the concrete and sealed in a capsule, an injection channel connected with the capsule is reserved in the concrete, and the static explosive expands to open the capsule and strip the concrete around the steel bar after being injected with a liquid. The concrete support adopts self-explosion type explosion, and compared with a traditional static explosion method, the step of explosive drilling is omitted. The support is low in noise, small in flying dust and high in dismantling efficiency during dismantling.

The invention relates to an electromagnetic-acoustic orthopedic surgery guiding device and an alarm method thereof. The device includes a drill rod, an electromagnetic acoustic sensor, a measurement and control instrument, an alarm indicator and a power source. The drill rod comprises a front end for surgery drilling and a corresponding rear end. The electromagnetic acoustic sensor is arranged atthe rear end of the drill rod. The measurement and control instrument is connected with the electromagnetic acoustic sensor, the alarm indicator and the power source separately. The electromagnetic acoustic sensor comprises a metallic sheath, a coil, a permanent magnet and a sound absorption sleeve. The metallic sheath is in interference fit with the drill rod. The coil winds around the metallic sheath. The permanent magnet is connected with the metallic sheath. The sound absorption sleeve is firmly matched with the endmost portion of the drill rod. Compared with the prior art, the electromagnetic-acoustic orthopedic surgery guiding device and the alarm method thereof can overcome the influence of body fluid on detection in an electrical conductivity detection method, precisely measure thethickness of front tissue, and guide spinal surgery drilling.

The invention provides a male die and a modifying method thereof of a blade die as well as a blade prebending adjusting method. Before a female die is developed, the pre-bending degree of a blade is changed by changing the blade root part of the male die. The male die modifying method comprises the following steps: chordwise dividing a to-be-modified male die, forming a blade root part and a main body part; rotating the blade root part towards or away from a tower tube for a preset angle; and splicing the main body part and the rotated blade root part, forming the modified male die. The blade prebending adjusting method comprises the following step: modifying the male die according to the male die modifying method; or when the blade is machined and manufactured, reserving a pre-cone angle at the blade root part so that after the blade is mouthed, the blade root part can be rotated towards or away from the tower tube for the pre-cone angle. The male die comprises the blade root part and the main body part which are formed by chordwise dividing, the blade root part can be rotated towards or away from the tower tube for the preset angle, and the complete male die is formed after the rotated blade root part is spliced with the main body part.

The invention discloses a method and a device for measuring a cable force. The device comprises a pin shaft and an ear plate, wherein an axial through hole is arranged in the axial axle wire of the pin shaft, two ends of the axial through hole are respectively and symmetrically provided with a transmitting end and a receiving end of an optical measurement system, a measurement plane of the optical measurement system is coplanar with the axial axes of the pin shaft and the action direction of load, and the ear plate is provided with a limit device to be connected with the pin shaft. On the basis that the pin shaft has the characteristics of being even in material and completely and linearly elastic under the stress state, the cable force of an inhaul cable is confirmed by the measurement of the tinny deformation of the pin shaft of a connecting node under the action of the cable force and the linear relationship between the cable force and the deformation. The method and the device provided by the invention are nondestructive testing technologies, thereby being wide in application range.

The invention discloses a radio-frequency coaxial connector for a cable television system, which comprises an extrusion joint, an extrusion lining core and a rear extrusion sleeve, wherein an extrusion joint nut is arranged at one end of the extrusion joint in a sleeving manner; the extrusion lining core is arranged in the extrusion joint; one end of the extrusion lining core is in sealing connection with the extrusion joint nut; the rear extrusion sleeve is arranged at the other end of the extrusion joint in a sleeving manner; a connecting gap is formed between the extrusion lining core and the extrusion joint nut; a first seal washer is assembled in the connecting gap; and a second seal washer is arranged at a groove part of a threaded back of the extrusion joint nut. With the adoption of the mode, the connector can reduce signal failure brought by an assembly damage due to the fact that metal at a joint connecting part collides directly, and the silica gel washers which are additionally mounted among connecting pieces do not influence stress among the original assemblies, so that rotation is more uniform and smoother, a waterproof effect is exerted, short circuit of a signal due to the fact that water enters equipment connected with the joint for a long time is reduced, connected front-end equipment is prevented from being damaged, and the aging of the equipment is postponed.

The invention relates to a directly-operated type diaphragm valve, which comprises a valve body and a driving device arranged outside the valve body, wherein the valve body comprises a valve shell, a valve housing, a diaphragm, a push-and-pull rod and a spring; the shell warps the outside the valve housing; the periphery of the diaphragm is pressed on the valve housing by a pressing block; a cavity is formed among the shell, the pressing block and the valve housing; the push-and-pull rod is positioned in the cavity; the diaphragm and the valve housing enclose an inner cavity; the inner cavityand the outside are connected by at least two channels; the push-and-pull rod is in a frame shape and is sleeved outside a component formed by the pressing block, the valve housing and the diaphragm to improve the pressure resistance of the valve; the spring is arranged between the pressing block and the push-and-pull rod to improve the stress condition of the parts in the valve and improve the stability of the valve; and the push-and-pull rod has an adjustable structure, so that the manufacturing difficulty of the relevant parts is lowered.

The invention discloses a fall prevention device for a lifting scaffold. The fall prevention device includes a scaffold body and a fall prevention wheel; a plurality of radial support lugs are arranged at the outer edge of the fall prevention wheel; the fall prevention device is characterized by further including sliding blocks mounted on the fall prevention wheel or the radial support lugs, sliding grooves are formed in the fall prevention wheel or the radial support lugs and are strip-shaped grooves, the length direction of the sliding grooves is arranged along the radial direction of the fall prevention wheel, the sliding blocks are mounted on the fall prevention wheel or the radial support lugs through the sliding grooves, and when the fall prevention wheel rotates, the sliding blockscan slide in the length direction of the sliding grooves; the fall prevention device further includes a baffle block mounted on the scaffold body, and in the process that the sliding blocks rotate along with the fall prevention wheel, when the rotation speed of the fall prevention device is greater than a preset threshold value, the baffle block partially or completely falls in the motion trajectory of the sliding blocks; when the sliding blocks and the baffle block interacts with each other, the baffle block exerts resistance for impeding further rotation of the sliding blocks on the slidingblocks. The fall prevention device for the lifting scaffold is simple in structure and reliable in performance.

The invention discloses an anti-pipeline side settlement system and construction method for soft soil foundations. The anti-pipeline side settlement system for soft soil foundations includes pipes, structure pool walls, structure bottom plates, concrete backing plates and sand foundations. One end of the pipe runs through and is fixed to the pool wall of the structure, one end of the bottom plate of the structure extends out of the outer surface of the pool wall of the structure and forms a picket, the concrete backing plate is located directly below the pipe, the One end of the concrete backing plate is fixed on the pick foot, and the sand foundation is located above the concrete backing plate. The concrete backing plate has a certain strength and rigidity, and one end of it is fixed on the structure. Relying on its own strength and rigidity, it can coordinate the uneven settlement of the soft soil foundation pipeline and the structure, and effectively prevent the pipeline at the connection between the pipeline and the structure due to poor settlement. And there are problems such as flex joint damage, pipe cracking and water leakage.