58 results about "Uplift force" patented technology

The invention relates to a bridge bent cap dismantling construction method, and belongs to the technical field of bridge reconstruction and extension construction. The method aims at solving the technical problems that a traditional dismantling process is low in efficiency and high in safety risk, and a reserved structure is prone to being damaged. According to the technical scheme, the method comprises the steps that cutting, blocking and hoisting equipment is planned according to the size and weight of the bent cap; a diamond wire sawing machine is adopted for cutting, and lifting force is continuously applied by hoisting equipment in the whole cutting process; construction is carried out according to the sequence that a bent cap main body part between the pier columns is cut off firstly, then a supporting system and an operation platform are erected on the pier columns, and then bent cap cantilever parts on the outer sides of the pier columns are cut off; and finally, crushing treatment and column top fine chiseling are conducted on a platform, the elevation is accurately controlled, and the steel bars are stripped. The method is mainly used for safe, efficient and accurate dismantling of the old bent cap in highway and urban bridge reconstruction and extension projects.

The invention discloses an anchor bar pile pulling resistance detection system and detection method, and relates to the technical field of data processing, first to fourth sensing modules are connected with a data processing module, and the first to fourth sensing modules are arranged on anchor bar pile pulling resistance detection equipment; the first sensing module measures the pulling resistance of the anchor bar pile; the second sensing module measures displacement data; the third sensing module measures the tension of the anchor bar pile; a fourth sensing module measures temperature data of the anchor bar pile in the drawing process; and the data processing module is used for drawing an anti-pulling force-displacement curve according to the anti-pulling force and displacement data, drawing a pulling force-displacement curve according to the pulling force and displacement data, and determining a detection result according to the anti-pulling force-displacement curve, the pulling force-displacement curve and the temperature data. According to the technical scheme, the detection efficiency can be improved, and the detection result can be obtained in time; and meanwhile, relevant data in the anti-pulling test process can be intelligently and automatically obtained, so that the detection accuracy can be improved.

This invention discloses a reinforcement learning-based optimization method for the construction process of cable-stayed tension structures, comprising the following steps: S1, randomly sorting the forming process sequence of the cable-stayed structure multiple times to generate a sample space matrix; S2, constructing a combined optimization model for the forming process of the cable-stayed structure based on reinforcement learning, and inputting the sample space matrix into the combined optimization model; S3, determining the range of various hyperparameters in the training of the combined optimization model, and finding the optimal training hyperparameters using the controlled variable method; S4, solving the sample space matrix using the model with the optimal training hyperparameters, and outputting the optimal forming process sequence. This invention, based on the Q-learning algorithm, explores the trade-off between the steel brace installation sequence and key mechanical performance characteristics during the forming process of the cable-stayed structure. The optimized steel brace installation sequence can reduce the maximum steel brace stress and the maximum cable lifting force, providing convenience for the selection of tooling in the actual forming process.

The invention relates to the technical field of pile pull-out test equipment, in particular to rapid stress enhancement connection type tubular pile pull-out test research and development and stress monitoring equipment which comprises a counter-force mechanism and a pile holding mechanism arranged below the counter-force mechanism, and the pile holding mechanism comprises a pile holding circular hoop, a plurality of linear drivers and a plurality of clamping pieces; the clamping pieces can adapt to pipe piles with different diameters by increasing or decreasing the number or adjusting the thickness, special clamps do not need to be replaced for the pipe piles with different specifications, and the adaptation cost of equipment is reduced; the stress monitoring unit monitors the stress change of the contact part of the clamping piece and the tubular pile in real time, the stable force transmission effect of the counter-force mechanism is combined, the tubular pile damage risk caused by over-clamping or the slipping problem caused by under-clamping can be found in time, the stress states of the tubular pile under different pulling forces can be accurately recorded, the test data has higher reference value, and the test efficiency is improved. And the adaptability of the equipment and the safety of the test are both considered.

The application discloses a method for testing the uplift bearing capacity of a slow-setting prestressed uplift pile, and aims to provide a method for testing the uplift bearing capacity of a slow-setting prestressed uplift pile, which can accurately and effectively evaluate the uplift bearing capacity of the slow-setting prestressed uplift pile. The method comprises the following steps in sequence: first, fixing the steel strand of the slow-setting prestressed uplift pile on a cross beam; second, lifting the cross beam upward by a jack, so that the jack applies an uplift force on the steel strand of the slow-setting prestressed uplift pile through the cross beam; after the uplift force applied on the steel strand by the jack reaches a set value F1, the jack keeps the state; third, fixing the steel bar of the slow-setting prestressed uplift pile on the cross beam; fourth, the jack continues to load and lifts the cross beam upward, so that the jack applies an uplift force on the steel strand and the steel bar of the slow-setting prestressed uplift pile through the cross beam, until the jack loads to a set value F2 or until the slow-setting prestressed uplift pile is damaged.

This invention relates to the field of tower foundation technology and discloses a composite foundation for a tower with short piles and inclined anchors, and its construction method. The foundation pit has a central pit at the bottom center, and several sets of side inclined pits are evenly distributed along the sides of the bottom of the foundation pit. Self-tensioning inclined anchor assemblies are installed within the side inclined pits. A central connecting frame between the tops of the self-tensioning inclined anchor assemblies is fixed with bolts. A positioning base assembly is installed within the foundation pit, positioned between the outer sides of the tops of the self-tensioning inclined anchor assemblies. A short pile steel reinforcement assembly is centrally located inside the positioning base assembly. All components of this invention can be prefabricated and then assembled on-site, improving construction efficiency and forming a unified structure with enhanced structural strength. The self-tensioning inclined anchor assemblies are anchored in the foundation, thereby bearing the horizontal load and uplift force transmitted from the tower, increasing the contact area between the foundation and the soil, better adapting to complex geological conditions, and improving the stability and bearing capacity of the foundation.

The invention discloses an overpass bridge pile foundation anti-sedimentation structure in an expansive soil area, and relates to the technical field of pile foundation anti-sedimentation, the overpass bridge pile foundation anti-sedimentation structure comprises a pile foundation structure and an anti-sedimentation mechanism; the anti-settling mechanism comprises a first reinforcing structure and a second reinforcing structure; the bearing plate of the first reinforcing structure penetrates into bed rock through multiple rows of anchor bolts, the uplift bearing capacity is greatly improved compared with the prior art, uplift force of expansive soil can be borne, horizontal thrust is decomposed into axial pressure and shear force through a triangular structure formed by the supporting pieces, local stress concentration of the pile foundation structure is reduced through elastic buffering of an elastic cushion, and the pile foundation structure is more stable. A second reinforcing structure rigidly connects second connecting sleeves of adjacent pile foundation structures through connecting columns, the load dispersion efficiency is improved, differential settlement of adjacent pile foundations is controlled within a small range, an attaching plate of an inclined reinforcing column is attached to the curved surfaces of the pile foundations, the shear rigidity is improved, and the pile foundation structure is suitable for the soil mass with the high expansion grade; the shear deformation of the expansive soil is effectively resisted.

The present application relates to a kind of uplift pile bearing capacity test system and method, including to be tested uplift pile, steel cross beam, support pier, bottom expansion foundation, cushion block, through jack, pulley block device, steel wire rope, tension sensor, displacement sensor, fixed clamp, reference beam and cushion stone and other structures.The present application ingeniously utilizes the principle that pulley block has labor-saving and direction-changing in physics, by setting unit pulley block consisting of movable pulley, fixed pulley and reversing pulley, in combination with the mechanical lifting action of through jack, doubling the uplift force on the top of pile is realized, and the effect of timesaving is achieved.The present application has the characteristics of high testing efficiency, safe and reliable, cost saving, etc., and can be applied to the field test of different types of uplift pile bearing capacity.

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a method and a device for preparing internal cracks of a cement mortar sample based on camphor sublimability. According to the invention, an alkaline reaction is blocked by the paraffin isolation layer, and the problems of residue, thermal damage and chemical interference in the traditional technology are solved by combining a sectional volatilization control process (paraffin isolation, supercritical CO2 dissolution, sectional volatilization and vacuum improvement). The refitted vacuum device realizes low-temperature efficient sublimation through pressure control and condensation recovery, and supports accurate preparation of a complex fracture network. Experiments show that the compressive strength loss of the sample is reduced to be within 5%, and the mechanical test precision is remarkably improved.

The application relates to a method for installing and constructing an offshore wind turbine jacket, which can quickly determine whether the jacket is blocked during lowering by judging whether the sling is not stressed, the jacket is not lowered to the design elevation or the jacket is inclined; if the jacket is blocked, a tugboat is controlled to apply a transverse force to the low point of the jacket, so that the lateral extrusion surface of the pile wall of the pile of the insertion tip and the foundation pile is directly separated, the static friction balance is broken, and the gap between the insertion tip and the pile wall is enlarged; the main hook synchronously applies a vertical lifting force, and the jacket is quickly pulled out of the blocking position after the gap is formed. The combined effect of the lateral separation and the vertical pulling of the application can more efficiently break through the blocking threshold, reduce the hard friction damage between the pile wall and the insertion tip, and shorten the unblocking time. The scheme of the application uses two types of conventional offshore construction equipment, i.e., a crane ship main hook and a tugboat, without the need of customizing special devices, and the cooperative operation of the tugboat and the crane ship does not need complex linkage control, so that the equipment investment cost is reduced.

The application provides a parameter determination method and a cable-stayed anchor pile foundation, and the method comprises the following steps: obtaining a preset anchor plate diameter and a preset pile end soil penetration depth of the cable-stayed anchor pile foundation, and a pile foundation inclination and other foundation structure parameters of the cable-stayed anchor pile foundation; obtaining a pull-out ultimate bearing capacity of the cable-stayed anchor pile foundation under the conditions of the preset anchor plate diameter and the pile end soil penetration depth according to the preset anchor plate diameter, the preset pile end soil penetration depth, the pile foundation inclination and the other foundation structure parameters; obtaining a preset uplift force acting on the cable-stayed anchor pile foundation; performing compliance determination on the preset anchor plate diameter and the preset pile end soil penetration depth according to the size relationship between the preset uplift force and the pull-out ultimate bearing capacity, and obtaining target parameters of the cable-stayed anchor pile foundation. The scheme of the application meets the use requirements of the flexible photovoltaic support cable-stayed foundation, reduces the material consumption and cost, and can accurately determine the parameters of the cable-stayed anchor pile foundation, thereby facilitating the selection and construction.

The application discloses a quick deployment and recovery device for a shipborne underwater detection equipment; the system comprises a deck fixed base, a vertical guide mechanism, a sliding bearing mechanism, a folding and extending mechanism and a traction mechanism. In the deployment process, the traction mechanism is started to release the cable, the sliding bearing mechanism stably slides down along the vertical guide mechanism under the action of gravity and the auxiliary thrust of a pneumatic spring. The folding and extending mechanism is automatically unfolded under the action of gravity and water flow and is fixed by a mechanical locking mechanism, so that the underwater detection equipment is accurately sent to a predetermined working depth. In the recovery process, the electric recovery mechanism is started to wind the cable, the traction mechanism provides active lifting force, the sliding bearing mechanism is driven to go up along the vertical guide mechanism, and finally the equipment is completely recovered to the deck base. The folding and extending and sliding bearing mechanisms are cooperated to effectively solve the problem of lack of flexibility of a traditional marine equipment fixing mechanism, and the operation simplicity and efficiency of the device are obviously improved.

A control system, for a train 200 having two pantographs 202,252 raised for collecting power from an overhead line 401, addresses the problem of degrading contact stability of the trailing pantograph at high train speeds. The control system determines, relative to a direction of travel of the train 402, which of the two pantographs is a leading pantograph 202 and which is a trailing pantograph 252. The control system receives a measurement of a speed of the train and determines, relative to the measured speed: a first uplift force for the leading pantograph against the overhead line; and a second uplift force for the trailing pantograph against the overhead line. The second uplift force is greater than the first uplift force, and the difference between the first and second uplift forces is a function of the measured speed, wherein the difference increases as the vehicle speed increases. The control system then issues command signals to the leading and trailing pantographs to respectively apply the first and second uplift forces to the overhead line.

The invention discloses a design method of a directional maintenance ladder for a storage tank and a maintenance ladder. The maintenance ladder comprises a lower bearing platform and an upper bearing platform installed above the lower bearing platform, an elastic flat plate sliding support is arranged between the lower bearing platform and the upper bearing platform, wind load limiting columns are arranged at the two ends of the upper bearing platform, and limiting short columns used for limiting are arranged at the two ends above the lower bearing platform; earthquake limiting brackets used for preventing overturning are arranged on the inner sides of the limiting short columns, and a plurality of steel ladder steel columns used for fixing the LNG storage tank are arranged in the middle of the upper bearing platform; the method comprises the following steps: S1, setting parameters of the storage tank limiting maintenance ladder; s2, setting boundary conditions; s3, inputting the parameters in the S1 and the boundary conditions in the S2 into finite element software to extract shearing force and uplift force borne by the limiting short column; and S4, calculating a limiting short column, an earthquake limiting bracket and a wind load limiting column. According to the design method, the overall overhaul ladder can be prevented from overturning; the problem that when the LNG storage tank displaces, the overhauling ladder is greatly deformed and even damaged is effectively solved.

The utility model relates to the technical field of pile foundation engineering, and particularly discloses a physical model test device for testing the anti-pulling performance of a non-soil-squeezing precast pile foundation, which comprises a multifunctional cement grouting machine, a slurry storage pool, a vacuum pump, a water storage tank, a vacuum water pumping pipe, a model box bottom plate, a model box side plate and a high-strength toughened glass plate, and the output end of the multifunctional cement grouting machine is communicated with the outer surface of the slurry storage tank. According to the large-diameter non-soil-squeezing uplift pile construction device, an axial load is applied through an axial jack, loads of the upper portion and the lower portion of a model pile are collected through an upper pressure sensor and a lower tension sensor, pile body strain is collected through a pile body strain gauge, and a load displacement curve (Q-S curve) of a static load test of an uplift pile is obtained; the bearing capacity and the side friction resistance of the while-drilling pipe pile are obtained through calculation, the displacement of the uplift pile and the displacement of the soil layer can be obtained through the dial indicator and the laser displacement meter respectively, and therefore the contribution effects of different uplift measures on the uplift force are judged.

The application relates to the technical field of large-span steel structure construction, and provides a mounting device and method for a string beam inner ring structure, which is characterized in that the method is performed through the steps of mounting a supporting device, mounting an upper rigid load-bearing structure, assembling a lower flexible ring cable combination on the ground, lifting the ring cable combination by using a lifting device, connecting a flying column and mounting a cross cable. The lifting device comprises a plurality of lifting units distributed in the circumferential direction of the ring cable, each lifting unit is wrapped around and tightly held around the ring cable in a symmetrical binding mode through a flexible sling, and a stable lifting force system is formed. The mounting difficulty of the upper rigid and lower flexible inner ring structure is solved, and the mounting precision, efficiency and safety are significantly improved.

A gas injecting system (10) for use with installing a foundation (100) having a body (12) for insertion into soil (200) in an insertion direction during installation. The body (12) having a toe (22) at its distal end (20). The toe (22) defining an aperture (24) into an internal cavity (18), wherein soil (200) is displaced laterally into a displaced soil suspension region (26) within the internal cavity (18) when the toe moves through the soil (200) during installation. The gas jetting system (10) comprises a plurality of outlets for injecting a gas into the displaced soil suspension region (26) for applying a lifting force to soil (200) suspended in the displaced soil suspension region (26) for reducing soil suspension pressure at the toe (22).

A pile extractor (12) for removing a pile (14) from a ground surface. The pile extractor includes a frame (15) arranged to seat upon the ground surface and a pile engaging arrangement (16) operably coupled to and supported by the frame (15). The pile engaging arrangement (16) includes rams (18) which actuate associated clamps (20) arranged to releasably engage with the pile (14) in a reciprocal motion, the reciprocal motion including a lifting condition in which the rams (18) extend to engage the clamps (20) with the pile (14) and exert a lifting force on the pile (14), and a release condition, in which the rams (18) are relatively and simultaneously lowered which likewise simultaneously releases the clamps (20) and allows the clamps (20) to be lowered relative to the pile (14) and reset to the lifting condition. A related method of use is also disclosed.

The invention relates to the technical field of geological exploration equipment, and discloses a kilometer-level multifunctional multi-process reverse circulation power head and a drilling method, the drilling depth of the kilometer-level multifunctional multi-process reverse circulation power head reaches the kilometer level, and the drilling torque and the lifting force are the maximum at home and abroad. Comprising a box body which is internally provided with a speed change structure, an input end and an output end. The speed changing structure is connected with the motor set, and gear shifting switching is executed through the hydraulic motor. The upper end of the box body is connected with an output end structure, and the lower end is connected with a hydraulic motor and an input end structure. The input end structure is provided with an air inlet pipeline, an air ball valve, a back flushing connector, an air box and a slurry inlet. The output end structure is provided with a slurry cooling pipeline and a rock debris discharging pipeline. A control system comprising a data acquisition module, a logic matching module and an action execution module is used for acquiring geological parameters in a hole in real time and automatically regulating and controlling mechanical actions of a bottom layer, and a hydraulic motor is used for driving a gear shifting shaft and a gear shifting connecting rod; and the first driving gear is shifted to slide to a preset final position along the input shaft to complete separation or physical engagement with the driven gear, so that the power requirements of different processes on the rotating speed and the torque are met, and switching of different functions is realized. The action execution module gives a back flushing instruction to switch the air ball valve to guide air to enter the middle pipeline of the double-wall drill rod and the bottom channel of the drill bit to be discharged outwards to clean blockage of the middle channel of the drill rod and blockage in a hole. Slurry flows through a cooling pipeline in the box body to complete heat exchange of the power head box body and flows into a drill hole, cooling of the power head is completed, and the slurry circulation process requirement is met. By switching inlet ends and outlet ends of different pipelines, switching among three drilling processes of air reverse circulation, gas lift reverse circulation drilling and wire line coring drilling is achieved, and different geological requirements are met.

Apparatus, systems, and methods for translating and rotating an object (650) to position the object (650) to an upright position. In an embodiment, an apparatus (100) may include a substrate (120) configured to be attached to a clamping vehicle; a surface plate (110); and a rotator (130) configured to rotatably connect the surface plate (110) to the base plate (120) such that the surface plate (110) is rotatable about an axis independent of the base plate (120). In embodiments, the surface plate (110) is positioned against the proximal end of the object (650), and a compressive force may be applied to the object (650) such that the surface plate (110) presses against the proximal end of the object (650). A lifting force may be applied to lift the object (650) upward to cause the surface plate (110) to rotate the object (650) toward the upright position while maintaining a secure retention of the object (650). The upright object (650) may then be lowered in an upright position.

The utility model provides a kind of adjustable overflow weir structure of intercepting well, it is related to overflow weir technical field, including overflow weir frame, still include adjusting assembly, adjusting assembly includes the sliding slot being opened in the inside of overflow weir frame, sliding groove is slidably connected with sliding plate on sliding slot, the outside fixed connection of sliding plate has connecting ring, the outside fixed connection of connecting ring has connecting rope;Power component, power component includes the sliding rail being fixedly connected in the outside of overflow weir frame, the outside slidably connected with first sliding block of sliding rail, the inside fixed connection of first sliding block has connecting frame, the outside fixed connection of connecting frame has counterweight;Such design is converted into the lifting force of sliding plate upwards by pulley with the gravity of counterweight downwards, so that smaller sewage flow can be earlier, more through weir plate below into intercepting pipeline, increase the interception rate of dry season sewage, effectively solve the problem that sewage is lost due to weir height cannot be reduced in dry season.

The invention relates to a tail water jacking stair upper reservoir earth and rockfill dam measuring weir device and a design method. The measuring weir device comprises a cutoff wall, a measuring weir, a reservoir and a pumping and draining facility. The cutoff wall is arranged behind the dam, the underground part is poured by high-pressure jet grouting piles and is connected with the overground part through steel bars, and the slope part adopts an anti-seepage curtain; the portion between the cutoff wall and the dam body is filled with block stones and provided with a diversion canal, the reservoir is located on a slope behind the cutoff wall, the right triangle measuring weir is arranged in the reservoir and connected with the diversion canal, the flap valve is installed at the bottom of the side of the reservoir, pedestrian stairs are arranged in the reservoir, the pumping drainage facility is arranged on a bank slope behind the reservoir, and drainage ditches are arranged on the two banks behind the dam to guide rainwater to the downstream. Size design and two corresponding operation modes of the diversion canal, the reservoir and the flap valve are also provided; according to the method, the problem of the leakage measurement value of the upstream earth and rockfill dam when the tail water of the cascade reservoir is jacked and the amplitude variation is relatively large is effectively solved, the uplift force of the upper reservoir earth and rockfill dam caused by high tail water jacking can be reduced, and the stability of the dam body is facilitated.

The invention relates to the technical field of foundation detection tests, in particular to foundation deformation experimental equipment which comprises test equipment, the test equipment comprises a simulation foundation and an uplift pile which are arranged on the foundation, and a test box, a jack and a pressurization steel beam which are arranged on the simulation foundation; the interior of the test box is hollow and filled with a filling body, a loading cover plate and a bottom plate are arranged on the upper side and the lower side of the test box respectively, the pressurizing steel beam is composed of a first steel beam body and a second steel beam body which are distributed up and down, the first steel beam body and the second steel beam body are placed in the X-axis direction and the Z-axis direction, and the first steel beam body and the second steel beam body are arranged in parallel. An uplift anchorage device is installed between the second steel beam and the uplift pile. According to the foundation deformation experimental equipment and the using method, the loading body is automatically ejected out through hydraulic driving, the traditional manual prying and smashing mode is changed, time and labor are saved, efficiency is high, the stress conditions, including vertical pressure, possible pulling resistance and the like, of a foundation in actual engineering can be truly simulated, and the experimental result has higher reference value.

The invention describes a welfare unit (1) such as a toilet, shower or storage facility having an enclosure defining a unitary body (2) with access door (7) and means for attaching (4) the enclosure / welfare unit to a lifting hoist. The means for attachment is adapted to transfer lifting forces evenly throughout the enclosure via frame elements (25) moulded integrally with the unitary body to provide a rateable lifting weight (safe working load) of said enclosure substantially greater than the inherent weight of the enclosure, including access door and fittings associated with the function thereof. There is further describes a method of forming a welfare unit comprising an enclosure having frame elements integrally formed therein. The method includes preferred moulding steps, formation of the means for attachment to a lifting hoist and selecting interior components to define the utility of the welfare unit.

The invention provides a running machine. The running machine comprises a base frame, a running plate, an inclined structure and a lifting auxiliary mechanism. The running plate includes a front portion and a rear portion, the rear portion of the running plate being pivotally attached to the base frame at least at the rear portion. A tilt mechanism is attached to the deck and is configured to apply a lift force to the front portion of the deck to change a height of the front portion of the deck. The lift assist mechanism includes a first spring connected to the base frame and configured to unload a portion of the lift force from the tilt mechanism, where the deck is selectively engaged with the first spring based on a height of a front portion of the deck such that the first spring is engaged with the deck within a first angular range of the deck and the second spring is engaged with the deck within a second angular range of the deck. And a second angular range of the running plate, the running plate being tiltable within a set of tilt angles at which the front portion is lower than the rear portion, and wherein the set of tilt angles of the running plate includes an angle between less than zero degree and minus 15 degrees.

The invention provides a multi-source sensor fused hydraulic grab bucket soil hardness control system and method, and relates to the technical field of intelligent control of ocean dredging equipment.The system comprises a data acquisition module, a feature fusion module and a decision module; the feature fusion module can calculate the hardness index of the soil texture of the dredged soil which is being excavated in real time according to the measurement data of each sensor, and the decision module is the center of the whole adaptive control system and can convert the soil texture hardness index generated by multi-source sensing fusion into an executable grab bucket control instruction. Through multi-sensor data fusion, seabed soil hardness is sensed in real time, grab bucket operation parameters (lowering speed, bucket opening and closing opportunity and lifting force) are dynamically adjusted, the problems of energy waste, low efficiency and equipment damage caused by artificial experience errors in traditional dredging are solved, and rock geology (gt; and high-efficiency and environment-friendly excavation under the pressure of 60 MPa is realized.

The present application relates to the technical field of power transmission line tower structure, and particularly relates to a single-anchor-bolt tower footing plate structure and a design method for uplift bearing capacity of the single-anchor-bolt tower footing plate structure, the single-anchor-bolt tower footing plate structure comprising a main material connecting part, a shoe plate, a tower footing plate, a stiffened plate and a single-anchor-bolt; the shoe plate and the tower footing plate are connected by welding of two adjacent edges to form a hinged constraint boundary, the hinged constraint boundary only transmits vertical shear force and does not transmit bending moment; the shoe plate converts the vertical uplift force into linear distribution force through the hinged constraint boundary and transmits the linear distribution force to the tower footing plate; the tower footing plate is plastically bent and deformed under the combined action of the linear distribution force and the concentrated counterforce provided by the anchor bolt, a plastic yield line failure mode is formed when the tower footing plate reaches the ultimate bearing capacity, the vertical uplift force is converted into the axial tension of the anchor bolt and transmitted to the foundation concrete. The present application realizes the single-anchor-bolt tower footing plate structure and the precise quantification of the uplift bearing capacity of the tower footing plate in a compact space by considering the hinged characteristics of the shoe plate and the influence of load eccentricity.

The utility model discloses an auxiliary installation device for a tunnel ventilation pipe, and relates to the technical field of pipeline installation. The supporting frames are symmetrically arranged at the top of the base; the mounting frame is arranged on the common top of the two groups of supporting frames; the fences are arranged on the two sides of the mounting frame; the hanging mechanisms are arranged at the two ends of the mounting frame; the placing frame is arranged in the middle of the top end of the base; the hydraulic lifting columns are symmetrically arranged on the two sides of the base and connected with the bottom of the fence; the protective ladders are mounted at two ends of the fence; the fixing mechanism is arranged in the placing frame; the supporting assembly sleeves the outer side of the supporting frame and is located at the top of the base; and the control panel is arranged on one side of the base. According to the utility model, the hanging mechanism is arranged, so that the hanging mechanism can uniformly bear the weight of the ventilation pipe in the placing frame, the ventilation pipe in the placing frame is kept stable in the ascending process, and the problems of inclination, shaking and the like of the ventilation pipe caused by non-uniform lifting force are avoided.

The application discloses an ice layer vertical ice breaking test device suitable for field conditions and belongs to the technical field of sea ice mechanical property testing. During use, an output torque is provided by a motor, the torque is transmitted to a lifting machine through a steering device and a connecting shaft, the lifting machine converts the horizontal torque into a vertical lifting force and drives a I-beam to move in the vertical direction, and vertical loading on the ice layer is realized. The lifting machine and the I-beam are flexibly connected through a flange universal joint. The I-beam moves in the vertical direction and applies a vertical loading force on the ice layer through an eccentricity-preventing pressure head. A generator provides power for the system, and the data of the pressure head and a displacement sensor during the test are recorded through a data acquisition device. The application provides a load which is perpendicular to the ice surface and vertically upward in the form of a reaction force, is not limited by water depth during use, can still provide a vertical stable loading force under the condition that the ice surface is uneven and avoid unintended bending moment on the tool itself, is more suitable for field ice test, and can reduce the requirements for waterproofing and corrosion resistance.

The invention relates to the technical field of dismantling of damaged berthing platforms, in particular to a dismantling method for an offshore berthing platform, which comprises the following steps: S1, constructing a clamping pile; s2, the damaged berthing platform is divided into three blocks; s3, the barge and the crane ship enter the site; s4, the first berthing platform block is dismantled; s5, the second berthing platform block is dismantled; and S6, the third berthing platform block is dismantled. According to the dismantling method, by means of block dismantling, temporary reinforcement, rope saw cutting, gradual lifting force application, flexible guide wheel arrangement, pre-cutting, accurate lifting force control and the like, the problem that the heavy-weight damaged berthing platform is difficult to dismantle is successfully solved, and the dismantling safety and operation efficiency of the damaged berthing platform are improved.