94 results about "Uplift force" patented technology

The invention provides a shield tunnel construction period segment longitudinal dynamic floating prediction method, and relates to the field of shield tunnel segment floating prediction.The method comprises the steps that the static upward floating force and the dynamic upward floating force of a shield tunnel are calculated by considering the timeliness of slurry, and the characteristic of nonlinear change of the rigidity of a circular seam connector is considered; the method comprises the following steps: dividing bending-resistant and shearing-resistant deformation modes of a circular seam joint, further deducing bending rigidity and shearing rigidity of a tenon-type joint in each deformation stage, deducing a shield tail segment longitudinal floating prediction model of the circular seam joint in the shield tunnel construction period, and constructing a nonlinear iterative algorithm of shield tunnel longitudinal deformation according to the theories; and acquiring parameter data of actual engineering, and inputting the parameter data into the duct piece floating prediction model to obtain a duct piece floating value. By means of the method, accurate prediction of floating deformation of the shield tail segment in large shield tunneling can be achieved, an effective scientific basis is provided for large-diameter shield tunneling construction, the problems that parameter decision of shield tunneling machine operators is difficult, and the segment floating control effect is poor are solved, and structural diseases caused by too large floating of the shield tail segment are eliminated.

The invention discloses a method for treating cracking of a power transmission tower foundation by reducing uplift force. The method comprises the following steps: building an uplift-resistant foundation; processing a connecting plate; a protective cap of the cracked foundation is dismantled; welding the connecting plate and the tower foot plate; installing a temporary stay wire for controlling the safety of the iron tower; the cracked concrete is removed; pouring and curing concrete at the cracking part; dismantling the temporary stay wire; and pouring a concrete protective cap. According to the method for treating power transmission tower foundation cracking by reducing the upward pulling force, the upward pulling force acting on the foundation is reduced, and cracked concrete is removed, so that the problem of foundation cracking is fundamentally solved.

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 belongs to the field of cast-in-situ bored piles, and relates to a cast-in-situ bored pile steel casing lifting device and method which can reduce the difficulty of taking out a steel casing and protect the steel casing. The cast-in-situ bored pile steel casing lifting device comprises a lifting unit and a vibration unit. The lifting unit is configured to lift the steel casing, and the vibration unit is configured to send high-frequency vibration waves to the steel casing. The cast-in-situ bored pile steel casing lifting method comprises the step that the upper end of a steel casing is fixedly connected with a lifting unit. The lifting unit applies upward lifting force to the steel casing, the lifting force is gradually increased, and when the lifting force is the same as the gravity of the steel casing, high-frequency vibration is applied to the steel casing located above the ground, so that the whole steel casing generates high-frequency vibration. And the lifting force is continuously and gradually increased, so that the steel casing is gradually lifted upwards.

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.

A girder tie for connecting a building component to a rigid rod to resist uplift forces applied to the building component comprises a connector including a building component connector and a rigid rod connector coupled to the building component connector. The rigid rod connector attaches to the rigid rod. The building component connector includes first and second back flanges free of direct connection to one another. The first and second back flanges can each be attached to the building component. A washer is disposed between the rigid rod connector and a nut on the rigid rod that secures the rigid rod to the girder tie. The washer includes at least one back flange brace to inhibit the first and second back flanges from moving relative to one another when the building component experiences the uplift forces.

The present invention relates to the technical field of tunnel engineering, and in particular to a transfer equipment. The transfer equipment provided by the present invention includes a support assembly, a crane assembly, a hydraulic drive assembly and a hook assembly. Among them, the support assembly is arranged along the length direction of the connecting channel, the crane assembly is arranged on the support assembly and can move relative to the support assembly along the length direction of the connecting channel, and the hook assembly used to hang the material is connected to the crane assembly through the hydraulic drive assembly. Since the hydraulic drive assembly has a compact structure and a large lifting force, the transfer equipment can be used in a connecting channel with a relatively low height. The transfer equipment provided by the present invention can save the cost of changing the civil engineering structure. Compared with the transportation method using a long-distance belt conveyor, it can save the cost of purchasing a complete set of equipment. Compared with the turntable transfer method, it helps to improve the efficiency of the transfer of slag boxes and materials, can be reused, does not generate reinforcement and demolition waste, and meets energy-saving and environmental protection requirements.

The invention discloses a heave compensation tool, a heave compensation system and a control method. The heave compensation tool comprises a main body part; the moving block is slidably mounted on the main body part; the driving mechanism is used for driving the moving block to slide in the axial direction of the main body part; the first sensor is arranged on the moving block and used for detecting the heaving state of the moving block; the main body part is provided with a first hoisting part, the moving block is provided with a second hoisting part, the driving mechanism and the first sensor are electrically connected with the controller, and the controller is used for controlling the driving mechanism to act so that the moving block can have preset heaving displacement. When the heave compensation tool is applied to offshore installation, operation and maintenance of the floating wind turbine generator, the heave compensation tool is connected between a lifting hook of a self-elevating platform installation ship and a unit component to be installed, and the controller can control the moving block to perform heave compensation on the unit component to be installed, so that the unit component to be installed and the installed unit component are kept relatively static; and the lifting force of the crane is kept unchanged, so that the problem of static-to-dynamic is solved.

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.

A lifting system is designed to lift and lower a load. The lifting system may include a movable portion in sliding engagement with the fixed portion. The lifting system may be configured to translate a load coupled to the movable portion relative to the fixed portion. The lifting system may also include a balancing mechanism having an arm rotatably coupled to the fixed portion and one or more springs coupled to the arm and the fixed portion. The arm may be operably coupled to the movable portion by a cord. When the movable portion translates, the arm may rotate to deflect the one or more springs to provide a lifting force to counteract the weight of the load.

The present invention relates to a high-strength energy-dissipating steel-wood-composite connector, which comprises an orthogonally laminated timber wall body with installation slots opened on both sides and the bottom, a tension-resistant connector and a shear-resistant connector. The tension-resistant connector is inserted into the left and right sides of the orthogonally laminated timber wall body, and the shear-resistant connector is inserted into the bottom of the orthogonally laminated timber wall body; the tension-resistant connector includes a perforated steel plate adapted to the installation slots on the left and right sides of the orthogonally laminated timber wall body, an adhesive filled in the through holes of the perforated steel plate in the slots of the orthogonally laminated timber wall body, a glue-blocking tape pasted on the outer end of the perforated steel plate, and a steel plate base; to solve the problems that in high-intensity areas and multi-high-rise CLT shear wall structures, the shear force and uplift force required at the bottom of the wall body are large, the bearing capacity and stiffness of traditional shear-resistant and uplift-resistant parts are limited, and the energy-dissipating capacity and seismic effect are not good.

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 a combined anti-upheaval reinforcing method for an existing large-span operation open cut tunnel. The combined anti-upheaval reinforcing method comprises the following steps that filling soil at the top of the tunnel and between fender posts is reinforced through grouting; arranging a top beam and pouring a straining beam; uplift piles are arranged on the outer sides of the fender posts, and bearing platform pile foundations are constructed; constructing a coping beam in an alternate mode, penetrating through the fender posts through reinforcing steel bars and anchoring into the uplift piles; soil bodies on the outer sides of the existing fender posts are symmetrically excavated step by step to form grooves, longitudinal beams are built in the grooves in a segmented mode, and reinforcing steel bars of the longitudinal beams are anchored into the existing fender posts; a social corridor structure bearing platform and a bottom plate structure on the outer side of the groove are symmetrically excavated and poured step by step; excavating step by step and pouring a structural bottom plate on the inner side of the enclosure structure; the fender posts are dismantled to connect the channel structures into a whole, and an upper structure is constructed. The newly-built coping beams, the longitudinal beams and the uplift piles are coordinated and matched to form an integral uplift-resistant structure with the existing fender posts, uplift-resistant acting force can be efficiently transmitted to a soil layer on the lower side, and therefore uplift deformation of the open-cut tunnel is effectively controlled.

A lifting mechanism may be designed to raise and lower the component. The lift mechanism may include a movable bracket in sliding engagement with the support post. The lifting mechanism may also include a balancing mechanism having one or more springs, an adjustment assembly, and a wheel assembly. The lift mechanism may be configured to translate a component coupled to the movable bracket relative to the support column. A balancing mechanism may be operably coupled between the support column and the movable bracket. When the movable bracket translates relative to the support column, the balance mechanism can generate a lifting force to counteract the weight of the component. The balancing mechanism may also include an anchor. An anchor may be selectively coupled to the support column or the movable bracket to place the lift mechanism in one of a high force orientation or a low force orientation, respectively.

The utility model relates to the technical field of uplift pipe pile, disclose a kind of prefabricated concrete uplift pipe pile, including uplift assembly, uplift assembly is used to promote uplift effect, uplift assembly includes pipe pile main body, plugboard, transmission shaft and movable rod, installation space is opened in pipe pile main body, transmission shaft is rotatably connected with the inner wall of pipe pile main body, plugboard and movable rod are all around set on pipe pile main body, movable rod and transmission shaft transmission setting, plugboard and corresponding movable rod fixed connection, the stable contraction and expansion of plugboard are realized by the rotation of transmission shaft, plugboard and soil are fully inserted, strengthen its and the force between soil layer, improve the resistance to axial tension, the insertion action of plugboard is realized inside pipe pile main body, avoid the operation of soil to the internal component of this device interference, the device is provided with two groups of tension components by two groups of common setting, and unfold board and plugboard jointly provide enough uplift force, realize the stable use of the device.

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 relates to the technical field of anchoring foundations, in particular to a two-pile anchoring foundation structure with a base disc, the structure comprises anchor piles and the base disc, and the base disc is composed of a sleeve, a bottom supporting frame, an anti-sinking plate and the like; the bottom supporting frame is arranged between the two sleeves, the two sleeves are connected together, the anti-settling plate set is fixedly arranged at the bottom of the bottom supporting frame, and the contact area between the bottom supporting frame and the mud surface is increased; the anchor pile and the base plate are connected through grouting, and the upper load is transmitted to the anchor pile; in the installation period, the base disc can play a role of a pile supporting support, the stability of the anchor pile in the installation period is guaranteed, the pile supporting support does not need to be additionally arranged, the construction progress is accelerated, and meanwhile the installation cost is reduced. According to the two-pile anchoring foundation structure with the base plate, a plurality of mooring anchor points can be provided at the same time, and the mooring anchor points can be arranged to be of a connected structure, so that relative position errors caused by construction and installation are avoided; ballasts can be arranged on the framework at the bottom of the base disc, so that the stability of the foundation during installation can be improved, and the uplift force can be resisted; by adopting the foundation type, the construction efficiency is improved, and the installation cost is reduced.

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 present invention belongs to the technical field of bridge engineering, and particularly relates to a self-anchored suspension bridge with a root-shaped main cable arrangement. The suspension bridge includes a foundation, on which a tower base is installed, and a bridge tower is installed through the tower base. The main beam is installed through the bridge tower. The bridge tower includes a steel box-concrete main arch and several steel box-concrete secondary arches that are cross-fixed to each other. The main arch and several secondary arches are all arc-shaped structures. A main cable is arranged on the saddle on the bridge tower. The main beam passes through the space separated by the main arch and several secondary arches. The main cable is connected to the main beam through a suspender. The invention innovatively proposes a main cable with a dispersed root-shaped arrangement, which can not only reduce the compressive stress level of the main beam, but also reduce the uplift force at the beam end and the local anchoring stress, and at the same time can form a unique landscape effect. The suspension bridge has a light structure, a clear force transmission path, high material utilization rate, a unique landscape effect, mature construction technology, a short construction period, and a safe and reliable structure.

According to the hump type bidirectional slope ship lift, the slope ship lift is arranged according to the actual terrain, the operation efficiency of the slope ship lift is improved, and the operation energy consumption of the slope ship lift is reduced; the ship lift is a hump type dry and wet ship lift which is mainly suitable for natural slope terrains on the two sides of a high dam. The bidirectional inclined ship lift comprises an upstream inclined ship lift, a middle channel and a downstream inclined ship lift, the upstream slope ship lift and the downstream slope ship lift are connected through the middle channel; two ships can run in parallel at the same time in the middle channel. And balance weight units are arranged in the upstream inclined ship lift and the downstream inclined ship lift and are used for balancing the lifting force of the ship reception chamber.

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 present invention relates to the technical field of support structures for maritime transportation, and specifically discloses a support structure for the maritime transportation of large modules, including a hull, a deck integrally formed with the hull, a support assembly, and bolt fasteners; the hull is composed of a number of chambers, and rib positions are equally spaced in each chamber; the support assembly includes an I-beam welded to the deck and a column base plate arranged on the top of the I-beam; by welding the support assembly to the tops of two rib positions in the hull, the support of the rib positions can be utilized to ensure the stability of the support assembly on the hull, and at the same time, the gravity of the support assembly can be prevented from damaging the hull; the bolt fasteners, in cooperation with the fixed backing plates, fixed pressing plates, and filling backing plates, can effectively clamp and fix the column base plate stably between the two fixed backing plates to form a good positioning structure, thereby overcoming the uplift force generated during transportation and ensuring the stability of the column base plate and the column upright on the hull.