84results about How to "Ensure structural safety" patented technology

The invention relates to the technical field of off-grid renewable energy hydrogen production, and discloses an off-grid alkaline hydrogen production system and a power adaptive distribution and safety control method thereof, the off-grid alkaline hydrogen production system comprises a renewable energy power supply unit, a parallel electrolytic cell module, a gas-liquid treatment system and a main controller; in the Faraday hydrogen production mode, the bubble volume is compressed by adjusting the operation pressure so as to modulate the impedance characteristic of the electrolytic cell, and the energy efficiency is improved in cooperation with current control; and in the non-Faraday polarization hot standby mode, the voltage of the rectifier cabinet is controlled to be clamped to a non-gassing polarization interval, and liquid level plugging is constructed in the U-shaped communicating pipeline according to the fluid statics principle. The system is further provided with a transient buffering strategy based on the pneumatic capacity, and pressure attenuation is delayed through the gas dead zone volume when power is suddenly reduced. The problems of hydrogen production efficiency optimization, low-power safe hot standby and mechanical protection under wide power fluctuation are effectively solved.

The invention discloses a method for predicting the residual fatigue life of a titanium alloy component based on frequency mixing nonlinear ultrasound. The method comprises the following steps: firstly, building a detection system; the detection system is controlled to generate low-frequency f1 and high-frequency f2 sinusoidal signals to carry out frequency mixing excitation on the titanium alloy component, and ultrasonic response signals are collected; performing frequency domain analysis on the ultrasonic response signal, extracting a characteristic amplitude and calculating a nonlinear modulation parameter beta m; then, a Nazarov-Sutin equation and an Elber equation are combined, and a theoretical prediction model of the nonlinear modulation parameter beta m changing along with the fatigue life percentage f is constructed; finally, actual measurement parameters are substituted into the model to reversely derive the consumed fatigue cycle number N, and the residual fatigue life Nr is predicted by combining the critical failure total cycle number Nt of the component. According to the method, the quantitative mapping relation between the nonlinear acoustic parameters and fatigue damage accumulation is revealed by establishing the physical model, and accurate quantitative prediction of the residual fatigue life of the titanium alloy component is achieved.

This utility model provides a reinforced concrete foundation and photovoltaic support suitable for mountain foundations. The foundation includes a rock anchor bolt foundation and an above-ground reinforced concrete foundation. The rock anchor bolt foundation includes rock mass with drilled holes, anchor bolts anchored into the drilled holes, and anchor bolt fixing reinforcement connected to the upper end of the anchor bolts. The anchor bolt fixing reinforcement is embedded in the above-ground reinforced concrete foundation. The above-ground reinforced concrete foundation includes a foundation platform and short reinforced concrete columns extending vertically upwards from the centroid of the foundation platform. The bottom of the photovoltaic support column is embedded in the short reinforced concrete column. The rock anchor bolt foundation and the above-ground reinforced concrete foundation are formed as a single structure through the reinforced concrete structure, which can effectively fix the above-ground reinforced concrete foundation. This avoids the risk of the power station overturning due to excessive pull-out force on one side of the foundation caused by excessive eccentricity between the column and the foundation centroid due to terrain limitations or construction deviations.

This invention discloses a simplified calculation method for determining the length of anchorless sheet piles in bank protection reinforcement, belonging to the field of foundation pit support technology. The method includes the following steps: Step S1, performing pile length sensitivity analysis to examine the influence of the total sheet pile length L, soil cohesion c, and internal friction angle on the pile top displacement; Step S2, establishing a pile top displacement prediction formula based on the passive earth pressure coefficient theory and fitting multiple sets of working condition data; Step S3, establishing a simplified design process of "parameter determination - formula inversion - optimization verification," using the pile top displacement prediction formula to invert and solve for the optimized pile length based on soil parameters and the maximum pile top displacement, and comparing it with the minimum pile length that satisfies kick-toe stability to determine the final design pile length. This invention simplifies "trial calculation iteration" to "precise inversion," improving the design efficiency of anchorless sheet piles and achieving a balance between safety and economy by quantifying the influence of parameters.

The application discloses a kind of deep melting interlayer development area rigid pile composite foundation structure design method, it is related to rigid pile composite foundation field, including the following steps: step one, in the existing rigid pile bearing capacity calculation process, front-end increase subgrade-ground temperature field analysis;Step two, increase groundwater analysis;Step three, determine the compression modulus of the soil layer of seasonal freeze-thaw layer, (water-rich) melting interlayer, permafrost layer, bearing capacity characteristic value, check the single pile bearing capacity characteristic value of different positions in the cross section of roadbed using different pile length, pile diameter, pile body stiffness material;Step four, carry out zoned unequal design, adjust pile length, pile diameter, pile body stiffness, so that the range of all pile single pile bearing capacity characteristic values in cross section is lower than design allowable value.The application effectively optimizes pile foundation design, reduces material waste, reduces engineering cost, while ensuring the safety and stability of structure.

This invention relates to the interdisciplinary fields of underground rock engineering and pressure vessel structural safety, specifically to a method for designing the wall thickness of steel linings in high-pressure underground gas storage facilities based on joint load-bearing. This invention establishes a joint load-bearing structural model of the steel lining and surrounding rock, upgrading the traditional model of the steel lining bearing pressure alone to a collaborative stress-bearing model. Through mechanical calculations, the internal pressure sharing effect of the surrounding rock is quantified, avoiding the thickness redundancy caused by neglecting the contribution of the surrounding rock stiffness, effectively reducing the cost of the steel lining and the amount of welding work. Secondly, based on cyclic working loads, the actual stress amplitude of the steel lining is calculated, establishing a quantitative correlation between rock mass characteristics, cyclic pressure, and the stress state of the steel lining, solving the problem that traditional methods cannot quantify fatigue risk. Finally, through multi-dimensional constraint verification and iterative optimization, it ensures that the steel lining simultaneously meets fatigue, static, and structural requirements, achieving wall thickness reduction while ensuring safety, thus balancing engineering safety, economy, and construction feasibility.

This utility model discloses a windproof backflow prevention structure for cooling tower louvers. It relates to the field of cooling tower louver accessories and includes: an external window frame, an anti-blowing mechanism, and an anti-detachment mechanism. The external window frame has an installation frame at its rear end and a side frame on its side. A limiting shaft is vertically installed inside the side frame, and a slider is sleeved on the outside of the limiting shaft. A return spring is sleeved on the outside of the slider, and a rack is installed on the outside of the slider. The anti-blowing mechanism prevents wind from directly impacting the surface of the external window frame, and the anti-detachment mechanism prevents the external window frame and installation frame from falling off. This windproof backflow prevention structure for cooling tower louvers, by rotating the external wind shield to change its angle, blocks wind from directly impacting the external window frame, reduces the impact of wind on the interior of the cooling tower, ensures stable airflow inside the cooling tower, maintains cooling efficiency, and requires no manual intervention.

This invention discloses a method for determining the safe distance for secondary lining construction of the pilot tunnel in small-clearance tunnel blasting excavation, which involves judging the stability of the surrounding rock deformation and deformation rate, and determining the safe allowable distance R. i Given the range of values, design an orthogonal test scheme for on-site vibration velocity monitoring, and calculate the safe distance R for each scheme. i First, based on the safe allowable distance Ri, monitoring points for blasting vibration velocity are set up, and on-site vibration monitoring is conducted. A unique K value and α value are obtained by fitting parameters such as the measured vibration velocity and explosive charge, and the calculated safe allowable distance R is then calculated. j Determine the conservative safety allowable distance R b Does it meet the requirements? If it does, then it is the final safe allowable distance R. z This scheme can determine the safe distance between the blasting source of the subsequent tunnel and the secondary lining of the preceding tunnel, thereby reducing the impact of vibrations generated by the blasting excavation of the subsequent tunnel on the secondary lining of the preceding tunnel.

The invention discloses a honeycomb sandwich structure infrared image defect detection method and system based on improved YOLOv5. The method comprises the following steps: collecting defect images of a honeycomb sandwich structure to form a sample data set; training defect images in the data set based on an improved YOLOv5 model, predicting positions and categories of honeycomb sandwich structure defects, training an optimization model by using a loss function until convergence, and obtaining and storing optimal model weight data; the improved YOLOv5 model is based on a YOLOv5 architecture, a Swin Transform module is embedded in a backbone network, and the detection performance of the model on honeycomb sandwich structure defects is improved in combination with a C3 convolutional layer, a CBS module and an SPPF module; and acquiring a defect image of the honeycomb sandwich structure to be detected, detecting and identifying the defect image by using the improved YOLOv5 model based on the optimal model weight data, and generating and outputting a detection result. According to the method, small-size defect identification in multi-scale defect identification can be effectively realized, and the defects of a traditional convolutional neural network in processing complex backgrounds and small target detection are overcome.

This invention relates to the field of building construction technology, specifically a support-free construction process for strip skylights. It utilizes guide rails laid out on the cantilevered slabs of the side beams of the skylight to construct a movable operating platform consisting of a steel truss, transverse support platforms, rollers, guardrails, and steel toe boards. Construction is completed through parameter calculation and prefabrication, guide rail installation and straightening, platform hoisting and debugging, segmented operations, and cyclical machine movement. The invention includes methods for calculating steel truss deflection, single-wheel pressure, anchor spacing, and cantilever slab bearing capacity. A stepped panel design can be used to adapt to transverse slope conditions. This invention eliminates the need for full-span vertical support, freeing up lower space, supporting parallel operations of multiple processes, shortening the construction period, reducing material input, and allowing for the reuse of core components. It is suitable for the construction of narrow, equal-span strip skylights with cantilevered slabs on the side beams.

The invention relates to the technical field of civil engineering, in particular to a steel sheet pile supporting device. The steel sheet pile supporting device comprises a pile plate body, an enclosing purlin assembly and a steel pipe support, and the pile plate body is fixedly connected with the enclosing purlin assembly through a hanging piece; the enclosing purlin assembly comprises a front plate, a rear plate and I-shaped steel, the front plate and the rear plate are connected through at least two sets of first bolts, and the length of the first bolts is larger than the distance between the front plate and the rear plate. The I-shaped steel is inserted between the front plate and the rear plate, and the number of the I-shaped steel is 2-3; the steel pipe support is a steel pipe, the steel pipe support is connected with the front plate, at least two sets of first stiffening ribs are arranged at the end of the side, close to the front plate, of the steel pipe support, and the steel pipe support is in threaded connection with the supporting piece through the first bolt holes. According to the supporting device, the assembling procedure is greatly simplified, the connection between the steel pipe support and the enclosing purlin assembly is firmer and more reliable, the load effect under the full working conditions of supporting tension, pressing and the like can be effectively resisted, and the overall stability and the bearing capacity of the supporting device are further improved.

The application discloses an insect exoskeleton morphological layup composite panel, a sandwich structure and a preparation method. The sandwich structure comprises two pieces of bionic layup composite panels and a piece of aramid honeycomb core layer. The bionic layup composite panel draws lessons from the spiral stacking microstructure of the insect exoskeleton, the layup design considers the symmetry and balance requirements of the composite material, a fixed rotation angle is introduced between adjacent fiber layers, and the rotation angle is taken as a period of 180 degrees, and after a plurality of periods are laid and heat-pressed and cured, the bionic layup composite panel is obtained. The bionic layup design effectively reduces the interlaminar shear stress of the composite material, weakens the inherent anisotropy of the composite material, and improves the transverse bearing capacity and impact resistance. The bionic layup composite panel and the aramid honeycomb core layer have the advantages of high specific strength, high specific stiffness, impact energy absorption, vibration and noise reduction, electromagnetic shielding and the like, and a structure and function integrated material with more excellent comprehensive performance is obtained, and the structure and function integrated material is expected to be widely used in main load-bearing structures of various spacecrafts.

The application discloses a kind of overall arrangement methods of off-grid hydrogen production platform suitable for large-scale deep far sea wind power, and relates to the technical field of off-grid hydrogen production platform, the present application adopts reasonable vertical arrangement method, it is favorable to reduce platform load gravity center, reduce platform vertical irregularity, adopt reasonable plane arrangement scheme, it is favorable to the operation and maintenance of equipment device, and also reduce the adverse effect of gravity load eccentricity on platform structure, ensure the structural rationality and safety of deep far sea off-grid hydrogen production platform.

The utility model belongs to the technical field of viewing decks, and particularly relates to a large-cantilever viewing deck which is formed by continuously welding a plurality of steel box girders. The steel box girder comprises a bottom plate, a side plate is welded to the upper end of the bottom plate, a top plate is welded to the upper end of the side plate, a rear plate is fixedly welded to the rear ends of the top plate and the side plate, and a partition plate is welded to the bottom plate. Through the internal structural design of the steel box girders, the large-cantilever viewing platform has high strength and rigidity, the structural strength and safety of the large-cantilever viewing platform are ensured, and due to the fact that the steel box girders can be transported section by section, the transportation difficulty is reduced.

The utility model relates to the technical field of wasp breeding equipment, concretely relates to three -dimensional wasp breeding frame of adjustable interval, including left and right two groups of mutually symmetrical vertical beams, mutually symmetrical between two vertical beams in each group, the inside surface of two vertical beams in each group is fixedly installed with a plurality of slide rails, and the top and bottom of four vertical beams are fixedly installed with reinforcing beams, and the detachable installation of support plate is arranged between the two slide rails that left and right face each other, and the end plate body of support plate is located in the slide rail and is connected with the slide rail between sliding, a plurality of nest frames are fixedly installed on the upper surface of support plate, the nest frame part is provided with a protective screen cover, the end part rod body of slide rail is provided with a clamping hole, the outer sleeve pipe is fixedly installed on the front side plate body of support plate, the plug -in limiting rod is slidably connected in the outer sleeve pipe, and the plug -in limiting rod and the clamping hole are inserted and matched. The utility model can adjust interval, has the function of limiting, and is convenient to use.

An elastomer support easy to maintain comprises anchoring assemblies and an elastic supporting tool, an upper anchoring assembly and a lower anchoring assembly are arranged at the upper end and the lower end of the elastic supporting tool respectively, a supporting steel plate is arranged in the elastic supporting tool, and the upper anchoring assembly is fixedly connected to the supporting steel plate. A buffer ring is arranged between the lower anchoring assembly and the elastic supporting tool. The elastic supporting tool further comprises a rubber body, a partition plate and pressure-bearing steel plates, the partition plate and the pressure-bearing steel plates are vulcanized in the rubber body, the pressure-bearing steel plates are arranged above and below the partition plate, and the space between the partition plate and the pressure-bearing steel plates is filled with the rubber body. Under the condition of ultimate displacement, the horizontal bearing capacity of the support can be enhanced, beam falling can be prevented, the safety of a bridge structure is guaranteed, and under the action of an earthquake, large horizontal deformation capacity can be provided and reliable horizontal limiting can be guaranteed. The height adjusting base plates are arranged, and the height of the support can be flexibly and conveniently adjusted by filling or removing the base plates of different numbers and thickness specifications over or under the elastic body.

This invention provides a high-heat-dissipation battery component for new energy vehicles, belonging to the field of new energy vehicle heat dissipation battery technology. It includes a protective shell, inside which a cooling module is installed. The cooling module is used to cool the entire battery module. The battery module consists of a mounting box and battery cells. The battery cells are installed in mounting slots within the mounting box. A top plate is installed on the top of the battery module. The cooling module is connected to a serpentine cooling pipe, which has several adjusting components. Several adjusting components are arranged between adjacent sections of the serpentine cooling pipe. This invention, through the corresponding combination design of the cooling module, the serpentine cooling pipe and adjusting components, and the serpentine cooling pipe and adjusting components, achieves dual heat dissipation functions: overall cooling of the battery module and precise heat dissipation of individual battery cells, thus improving maintenance convenience.

The utility model relates to a waterproof flow guide blind ditch structure at the connecting place of diaphragm wall, it includes flow guide blind ditch main part, flow guide blind ditch main part sets up at the connecting place of diaphragm wall, is used for guiding the ground water flow, prevents the ground water and accumulates at the connecting place, the utility model discloses a flow guide blind ditch is established, effectively guides the ground water flow, prevents the ground water and accumulates at the connecting place, reduces the seepage risk, improves the overall waterproof performance of diaphragm wall, guarantees the engineering quality. The application still has the advantages such as convenient construction, low cost, can satisfy the efficient and economic demand of modern underground engineering construction.

The utility model relates to the technical field of building keel and discloses a steel baking varnish keel main keel and auxiliary keel connecting structure, and the connecting structure fixed assembly includes the fixed bolster, the fixed bolster is fixedly connected in the lateral wall of main part board, the bottom fixed mounting of fixed bolster has the connecting seat, the bottom fixed connection of connecting seat has the fixed plate, and the surface of fixed plate is penetrated by adjusting bolt, and the top fixed connection of adjusting bolt has the fixed clamp. The utility model discloses discarding the welding connection mode, and utilizing connecting structure fixed assembly and keel connection fixed assembly cooperation. Through screwing adjusting bolt, the connecting position of connecting structure and ceiling or frame can be flexibly adjusted, and the relative position of main auxiliary keel can be easily changed by rotating the adjusting handle, the accurate adjustment of installation position is realized, the needs of different construction scenes are satisfied, the defect that the installation position is fixed is overcome, and the flexibility and accuracy of construction are improved.

The present application relates to the technical fields of intelligent sensing of bridges, and particularly relates to an energy collection device arranged at a bridge expansion joint, a design method and a bridge expansion joint monitoring mechanism, comprising: a conversion unit arranged in a bridge expansion joint structure, capturing the strain of the structure after being stressed, and generating an alternating flexoelectric signal; a base layer located between the conversion unit and the bridge expansion joint, adjusting the strain distribution of the conversion unit; a rectification unit integrated with an impedance matching circuit, connected with the conversion unit, converting the alternating flexoelectric signal into a direct current, and delivering it to an energy storage unit; compared with the prior art, the beneficial effects of the present application are: the present application relates to a monitoring mechanism of a bridge expansion joint, the device has a self-powered structure based on the flexoelectric effect, without external power supply, significantly reducing the wiring and maintenance cost, at the same time, the monitoring unit realizes millimeter level displacement resolution and real-time structure health assessment, ensuring the structural safety of the bridge expansion joint.

This invention relates to the field of shipbuilding technology, and more particularly to a design method for a multi-layer continuous truss support structure for ships, comprising the following steps: fixing support columns between adjacent decks vertically, the support columns being located at deck transverse beams, and the support columns on the same vertical line forming support columns; arranging multiple rows of the support columns at intervals along the ship's width; arranging multiple rows of the support columns at intervals along the ship's length, each row of support columns being located on the same straight line and arranged at the long longitudinal bulkheads of the hull; arranging deck longitudinal girder below each deck along the ship's length, the deck longitudinal girder connecting to the deck transverse beams and the corresponding support columns, such that the deck longitudinal girder, the support columns, and the deck transverse beams form a truss support structure. This invention can ensure the progress and quality of the design and improve space utilization.

The invention relates to the technical field of mine filling, and discloses a high-flux slurry continuous pumping system for underground goaf governance, which comprises a pumping driving unit, a pipe network sensing unit and a central control unit, and is characterized in that sine disturbance signals are superposed at a pumping reference frequency through the central control unit, and pressure disturbance waves carrying phase characteristics are constructed; extracting a phase deviation parameter of the pipe network response waveform, and identifying that the pipeline is in a metastable state deposition stage when the change rate of the phase deviation parameter exceeds a threshold value; outputting a flutter signal to induce interface softening of the sediment, and connecting and outputting an asymmetric pressure pulse of which the rising edge slope is greater than the falling edge slope so as to peel the sediment; according to the method, the abnormal flow resistance is recognized in the deposition stage before dominant fluctuation of the outlet pressure occurs, the instantaneous peak pressure intensity in the blockage clearing process is reduced through a softening and stripping mechanism, and the structural safety of a pipe network under the high-throughput conveying working condition is maintained.

This invention discloses an in-situ tillage device for indoor vertical farming, belonging to the field of automated agricultural machinery technology. It includes a support frame and a tillage mechanism capable of moving relative to it. The support frame includes at least one planting trough, which is rotatably mounted on the frame. The tillage mechanism consists of a bridge-type traveling mechanism, a lifting component, and a suspended tilting cover. The tilting cover has an internal cavity and a tillage shaft, with a locking component at the bottom. This device connects the tilting cover and the planting trough into a rigid whole via the locking component, and drives them to rotate around the axis of rotation, causing the substrate to fall into the internal cavity and be processed by the tillage shaft. This invention effectively solves the problems of difficult deep substrate tillage, low automation, and limited inter-layer working space in traditional vertical farming, improving space utilization while achieving safe and thorough deep in-situ tillage.

The invention discloses a T-shaped transfer station node and triangular station hall broadened channel connection transformation construction method, which aims at solving the problem of simultaneously connecting two stations in a narrow triangular space and mainly comprises the following steps of: firstly, overlapping an interface upturning beam and a station ground wall through a connector to form a permanent Z-shaped beam structure to guarantee safety and clearance; secondly, adopting a step-by-step interface connection process of excavating and chiseling a linear ground wall at the same time and secondarily chiseling an L-shaped ground wall, and combining with a mixed support system consisting of a steel support and a permanent and temporary combined concrete plate support, so as to adapt to excavation of a narrow foundation pit; then, the channel structure plate is divided into a trapezoidal plate and a post-pouring small triangular plate, and reinforcement and transformation of the L-shaped special-shaped column are synchronously completed through a post-pouring plate hole; and finally, a temporary concrete column pier and a permanent Z-shaped structure are arranged to form double anti-falling guarantee. The method is safe, reliable and convenient to construct, the construction period is remarkably shortened, and the influence on the existing operation station and the surrounding environment is reduced.

This utility model relates to the field of mounting technology, specifically to a recessed unit panel mounting system, including a wall, a mounting mechanism fixed to the wall, and a column installed on the wall via the mounting mechanism. The mounting mechanism includes a ground bracket component, a mounting bracket, and a limiting angle bracket. The ground bracket component is installed on the wall, and the mounting bracket is installed on the column. The mounting bracket and the ground bracket component are detachably connected, and the mounting bracket and the ground bracket component are fixedly connected via the limiting angle bracket. The ground bracket component includes an L-shaped ground bracket and a mounting groove. The mounting groove is located at the bottom edge of the L-shaped ground bracket and is integrally formed with the L-shaped ground bracket. A U-shaped groove is provided on one side of the mounting groove. This unit panel mounting system, through the cooperative design of the suspension shaft and the U-shaped groove, combined with the lifting effect of the adjusting bolt and the top block on the L-shaped connector, realizes flexible multi-directional adjustment of the tilt angle when the column is connected to the wall. At the same time, the limiting angle bracket is used to lock the suspension shaft to ensure structural stability and safety.

The application discloses a novel foldable blade, which comprises a blade body, the blade body is divided into a pressure surface and a suction surface, the blade body is a three-section structure, a folding structure is connected between every two adjacent blades, a locking structure is arranged on the end surface of every two adjacent blades, a folding area compensation structure is arranged on the suction surface, the folding structure is used for driving the blade body to fold or unfold, when the blade body is unfolded, the three-section blades form a linear shape, the end surfaces of every two adjacent blades are tightly attached to each other and are locked through the locking structure, when the blade body is folded, the two blades located at the two ends of the three-section blades are folded towards the suction surface of the blade located in the middle, forming a U-shaped structure, and the folding area compensation structure is used for preventing the suction surfaces of the two adjacent blades from colliding. The application can effectively shorten the length of the blade, reduce the load of the blade tip which is easy to be damaged, and guarantee the aerodynamic performance and structural safety of the blade.

The utility model discloses a compressed air energy storage chamber temperature control system, which is applied to a chamber and comprises a first water source group, a second water source group and a temperature control system, the second water source group is used for providing heating water; the water pump assembly comprises a first cylinder body and a second cylinder body which are independent from each other, pistons are arranged in the first cylinder body and the second cylinder body respectively, and the two pistons are driven by the same power source to move in opposite directions; one end of the first water supply pipeline communicates with the first water source set and the second water source set, and the other end of the first water supply pipeline communicates with a left cavity of the first cylinder body and a left cavity of the second cylinder body. And cooling water of the first water source group / heating water of the second water source group is conveyed to the left chamber of the first cylinder body and / or the left chamber of the second cylinder body.

The utility model provides a pile film bag earth and rock cofferdam suitable for a high-permeable foundation. The pile film bag earth and rock cofferdam comprises a high-strength woven bag filled earth and rock cofferdam body, a high-strength composite geomembrane bagged earth and rock slope protection and anti-seepage blanket, a geomembrane anti-seepage inclined wall, an earth and rock filling cofferdam body, a high-strength composite geomembrane bagged earth and rock slope protection, a cofferdam crest mud stone pavement, a permeable layer and the like. The upstream upstream face adopts a double-insurance combination form of a high-strength composite geomembrane bagged soil and stone anti-seepage blanket, a high-strength composite geomembrane bagged soil and stone slope protection and a geomembrane anti-seepage inclined wall, and the good water retaining, anti-seepage, anti-impact and anti-frost heaving effects are achieved. And meanwhile, the foundation adopts the steel sheet pile anti-seepage core wall, so that the foundation seepage stability problem of the cofferdam constructed on the high-permeability foundation can be effectively solved. The anti-seepage structure can be applied to various wading engineering construction scenes and has the advantages of guaranteeing the anti-seepage effect, being safe in structure, saving investment, shortening the construction period, being environment-friendly and the like.

The application relates to the fields of green low-carbon technology and construction technology, and discloses a shield tunnel-based repair scheme decision method, device, equipment and medium, which comprises the following steps: generating a stiffness recovery index of a shield tunnel under each repair scheme through a preset stiffness recovery model; generating an average toughness index of the shield tunnel under each repair scheme according to the stiffness recovery index of the shield tunnel under each repair scheme, a stiffness degradation coefficient of the shield tunnel under each repair scheme, a design life of the shield tunnel under each repair scheme and a preset toughness model; generating a comprehensive evaluation value of each repair scheme according to the average toughness index of the shield tunnel under each repair scheme, a carbon emission amount corresponding to each repair scheme and a preset comprehensive evaluation model; and selecting a repair scheme with the maximum comprehensive evaluation value as an optimal repair scheme of the shield tunnel. The application is beneficial to improving the decision efficiency of the optimal repair scheme of the shield tunnel.

This utility model discloses a locking structure for the folding part of a folding bicycle, including a folding buckle and a locking buckle. Two folding buckles are provided; one folding buckle connects to the first folding part between the headstock connecting tube and the front frame seat tube, and the other folding buckle connects to the second folding part at a node of the front frame main beam. The folding buckle can lock and unlock the first and second folding parts. The locking buckle is connected to the fastening sleeve of the seat connecting tube and has a reverse buckle portion, which can be engaged and disengaged from the rear frame connecting part by swinging and rotating. This utility model provides two folding buckles and one locking buckle to lock the first folding part, the second folding part, and the connection between the rear frame and the seat connecting tube of the folding bicycle, respectively. This multi-point locking ensures the structural stability and safety of the folding bicycle in the unfolded state, effectively avoiding safety hazards caused by loosening of the folding parts during riding.