97 results about "Support design" patented technology

The invention relates to the field of tunnel engineering, in particular to a tunnel multi-physics field coupling simulation and support design method considering construction disturbance, which comprises the following steps of: modeling a disturbance source, collecting disturbance factor information introduced in a tunnel construction process or an external environment, establishing a disturbance source model to represent the spatial position, intensity and evolution characteristics of a disturbance source; constructing a three-dimensional disturbance propagation function; coupling the three-dimensional disturbance propagation function with a multi-physical field model, and introducing disturbance as a source item into a tunnel heat-water-force coupling model; according to the construction method customization mechanism, modeling parameters and solving strategies are adjusted according to the characteristics of different tunnel construction methods, and corresponding disturbance source model parameters, boundary conditions and constitutive relation adjustment coefficients are set according to the different construction methods. The problems that disturbance modeling is rough, a disturbance propagation mechanism is idealized, the disturbance propagation mechanism is disjointed with a multi-physical field model, and a construction method is not included in a disturbance response system are solved.

The invention relates to the technical field of mining engineering and geotechnical engineering support design, and discloses a roadway anchor rod group support parameter intelligent optimization method based on unbalanced force, and the method comprises the steps: building a surrounding rock finite element model, calculating a plastic stress increment through employing a minimum plastic complementary energy principle, and mapping the plastic stress increment into a node unbalanced force vector; an unbalanced force field reflecting reinforcement requirements is constructed, and an initial scheme is generated according to the unbalanced force field. Then, a virtual anchor rod unit is introduced to establish a nonlinear coupling model, an incremental balance equation is solved, and whether the unbalanced force is smaller than a threshold value or not is judged; if so, outputting an optimal parameter; otherwise, a comprehensive objective function containing safety and economy is constructed, new parameters are obtained through searching and decoding by means of the particle swarm algorithm, and the virtual anchor rod unit is re-entered for calculation to form a closed loop until convergence is achieved. According to the method, intelligent optimization is driven through a physical mechanism, the problem that a traditional design lacks a mechanical basis is solved, and accurate optimization of support parameters is achieved.

The invention discloses a support design method of a strong support steel frame based on layer critical stiffness, and relates to the technical field of building reinforcement. Comprising the steps of calculating the critical support stiffness of a frame column and drawing a nomogram of the critical support stiffness of the frame column, calculating the critical support stiffness of a shear type support steel frame layer of each floor, calculating the critical support cross-sectional area of the shear type support steel frame of each floor under the action of no horizontal load, and calculating the equivalent support area required for resisting the horizontal load. Calculating the critical support area of each floor frame under the action of a vertical load and a horizontal load; calculating the cross section area of a tension critical support single diagonal rod; and selecting the cross section model of a shear type support. The invention discloses a support design method of a strong support steel frame based on layer critical stiffness, provides design steps of a shear type strong support for the steel frame, and in the method, discloses a calculation formula of the structural layer critical support stiffness of the shear type support steel frame and provides a nomogram convenient for engineering application.

The present relates to a device being used in modular building construction comprising at least one flat load support comprising a first main face and a second main face, at least one elongated load support designed for being coupled with said flat load support. The device is characterized in that said flat load support comprises an array of transverse openings extending through the thickness of the flat load support. The flat load support is arranged for fastening said flat load support with said elongated load support at any position corresponding to one of said opening in a reversible manner and to any position between said openings in a reversible manner. Each flat load support comprises reversible lateral connection means and / or reversible transversal connection means for coupling flat load supports in a reversible manner. The flat load support and the elongated load support are arranged for being detachably assembled to provide the modular, reversible, and / or versatile building construction. The invention further relates to a modular construction building based on said device and to a method using said device.

The invention discloses a deep surrounding rock anchor rod spacing quantitative determination method based on fracture toughness parameters. The method comprises the following steps: obtaining the fracture toughness and uniaxial compressive strength of rock through an indoor test; determining a uniaxial compression parameter and an elastic modulus of the rock mass by combining a geological strength index GSI, a damage factor D and a Hoek-Brown criterion; calculating a brittleness index B4 by using the fracture toughness of the surrounding rock, the uniaxial compressive parameter of the rock mass and the elastic modulus; and based on the brittleness index B4, the rock mass elasticity modulus, the engineering burial depth and the rock mass volume weight, a quantitative calculation formula of the anchor rod spacing is established, an empirical coefficient is solved in combination with the spacing range of the corresponding surrounding rock grade in the specification, and finally quantitative determination of the anchor rod spacing is achieved. The method overcomes the defect that quantitative basis is lacked in spacing adjustment in existing specifications, and is particularly suitable for anchor rod support design for controlling brittle failure of surrounding rocks under the deep high-stress condition.

The utility model discloses a support-free detachable fixed template application structure applied to an assembly type structural system, which comprises a prefabricated truss reinforced concrete lower chord member, a floor slab prefabricated layer, more than one group of connecting supports and through fixing bolts, the connecting supports are arranged on the two sides of the prefabricated truss reinforced concrete lower chord side by side, a space used for pouring the truss reinforced concrete upper chord is formed between the opposite connecting supports, the connecting supports are installed on the prefabricated truss reinforced concrete lower chord through oppositely-penetrating fixing bolts, and the floor slab prefabricated layer is connected to the upper portions of the connecting supports in a lap joint mode. By the adoption of the method, a part of or even all scaffolds can be omitted, and the detachable standard connecting support designed in the utility model can be used as a temporary support of a main beam cast-in-place part side mold and a floor slab at the same time, and is fixed on a main beam prefabricated part through a split bolt; and the split fixing bolts in the cast-in-place height range can be accurately positioned according to the width requirement and support is formed.

This invention discloses a method for determining the loosening load of the bearing arch in mega-span tunnels based on plastic zone parameters, relating to the field of geotechnical engineering and underground engineering support design technology. The method includes the following steps: inputting tunnel and support parameters; obtaining the height of the plastic zone at the arch crown through numerical simulation; calculating the equivalent thickness of the bearing arch formed by the system anchors; determining the equivalent loosening load height; calculating the vertical loosening pressure; determining the lateral pressure coefficient based on the surrounding rock strength index; calculating the non-uniformly distributed horizontal loosening pressure; and cyclically outputting the verified load through load displacement verification. This invention directly incorporates the plastic zone development state into the load calculation and establishes a self-correction mechanism, achieving refined and dynamic determination of the loosening load, thus improving the safety and economy of mega-span tunnel support design.

The application discloses a 3D printing method and device for a flange, which comprises the following steps: receiving data of a first part component, and generating the first part component; generating a first solid support based on the first part component; merging the first part component and the first solid support, and generating a non-solid support with the first solid support as a part outer wall; segmenting the first solid support to obtain an upper solid support and a lower solid support, merging the upper solid support with the first part component to obtain a second part component; performing a hollowing operation on the lower solid support to obtain a hollowed lower solid support, and merging the hollowed lower solid support with the first solid support to obtain a second solid support; and performing a slicing operation on the second part component, the second solid support and the non-solid support to print a corresponding part. The support design difficulty can be reduced, the support usage can be reduced, and the printing efficiency can be improved.

This invention relates to the field of foundation pit support design technology, and provides a foundation pit support design method and system based on digital twins. The method includes: establishing a digital twin related to the foundation pit and support; constructing a corresponding change curve from the foundation pit excavation data; substituting the curve into the digital twin to predict the mechanical parameters of the foundation pit sidewall at the unexcavated depth, thereby obtaining second soil layer change prediction data; judging the future support requirements changes at various points in the foundation pit based on the second soil layer change prediction data and real-time foundation pit support data, and adaptively reinforcing the foundation pit support using coordinates, thereby reducing foundation pit support costs and improving the efficiency of excavation-as-you-go support.

This invention belongs to the field of vehicle maintenance technology, specifically relating to the maintenance of load-bearing support devices, and particularly to an AGV mobile device for electric vehicle production and its operating method. In the first working state, the support member of the AGV mobile device for electric vehicle production radially outwards to open the sealing ring; in the second working state, the support member releases its support on the sealing ring, and the sealing ring radially retracts inwards. By combining the sealing structure of the sealing ring and the lifting cylinder with the radial opening mechanism of the support member, rapid disassembly and assembly of the sealing ring is achieved. During maintenance, simply switching the working state is sufficient to unlock and support the sealing ring, eliminating the step-by-step disassembly steps required for traditional threaded fastening, effectively shortening maintenance time. Simultaneously, the radial support design of the support member for the sealing ring avoids the plastic deformation problem easily caused by traditional interference fits, maintaining the deformation capacity of the sealing ring during repeated disassembly and assembly, significantly improving the service life of the sealing ring.

The utility model belongs to the technical field of steel structure supports, and particularly relates to a greenhouse steel structure support convenient and fast to install, which comprises a peripheral cover frame, a fixed base, a rotating steel net frame, a top beam, a supporting main beam, an auxiliary adjusting assembly and a reinforcing supporting assembly, the supporting main beam is fixedly connected to the top of the fixed base, the rotating steel net rack is movably connected to the top of the supporting main beam, the top beam is rotationally connected to the top of the rotating steel net rack, the auxiliary adjusting assembly is installed on the inner side of the rotating steel net rack, and the reinforcing supporting assembly is fixedly connected to one side of the supporting main beam. According to the device, the peripheral cover frame and the fixed base are in threaded connection, on-site welding operation is avoided, the auxiliary adjusting assembly achieves fine adjustment of the distance between the supporting main beams on the two sides through handle threaded rods and adapts to deformation compensation of greenhouses with different spans, meanwhile, the reinforcing supporting assembly adopts the telescopic supporting design, and therefore the supporting stability is enhanced.

The application provides a deep and shallow buried division method and system of underground engineering based on tunnel excavation effect, and belongs to the technical field of computer-aided design. The scheme comprises the following steps: obtaining an initial ground stress field of a tunnel area; sampling the tunnel area, carrying out a conventional triaxial test, and obtaining a full stress-strain curve of surrounding rock; obtaining ground stress information of a given engineering section according to the initial ground stress field of the tunnel area, establishing a three-dimensional numerical model of the tunnel, carrying out numerical simulation by using a constitutive model considering strain softening, and obtaining a stress field after tunnel excavation; and based on the full stress-strain curve and the stress field after tunnel excavation, deep and shallow buried division is carried out. The scheme fully considers that the occurrence of tunnel disasters under strong tectonic stress is significantly affected by true three-dimensional stress, considers the tunnel excavation effect, carries out deep and shallow buried division based on the true three-dimensional stress field, provides clear suggestions for the selection of the constitutive model of surrounding rock in the design process, and provides clear guidance for support design.

The present application relates to a kind of based on the stability discrimination method, system and medium of foundation pit of graph mutual driving mechanism, method includes: according to the suitable foundation pit support form of foundation pit design requirement, initialize various foundation pit design parameters, in parameter attribute value forward driving mode drawing foundation pit support structure sketch in CAD environment;According to the stability discrimination criterion of foundation pit, the actual working condition of project site is combined with manual tuning to design parameter, parameter adjustment result still uses with attribute driving graph mode immediate update support structure sketch, another can edit the graph element in support structure graph with graph driving attribute mode immediate feedback linkage update foundation pit support parameter;The stability of foundation pit support structure is calculated dynamically in real time throughout, when stability determination meets design requirement, with two three-dimensional interactive intuitive display foundation pit support design scheme, and output various design achievements.The present application can realize the graph attribute bidirectional mutual driving of foundation pit support design, it is convenient to quickly modify and perfect design scheme, improve foundation pit support design efficiency and quality.

The application relates to the technical field of bridge construction, in particular to a bridge pier pre-buried right-angle corbel support design method and system, which comprises the following steps: acquiring geological parameters of a bridge construction area, and mapping the geological parameters into load reduction coefficients of bridge pier sites; calculating right-angle corbel design loads, and synchronously generating a parameterized model of a Bailey buckle, and outputting an initial corbel model of an integrated buckle structure; performing pier column main reinforcement path and Bailey buckle space collaborative optimization on the initial corbel model to obtain an optimized corbel model with a perforated structure; performing multi-parameter iterative simulation analysis on the optimized corbel model to obtain a plurality of candidate design schemes; and performing multi-objective evaluation on the plurality of candidate design schemes to obtain an optimal design scheme. Through the application, the problems that geological conditions are difficult to quantify, load calculation lacks dynamic correction, and the space of a corbel and a Bailey buckle support is difficult to collaborate in the prior art are effectively solved, and integrated design of structure stress optimization and construction arrangement is realized.

The utility model discloses a beam body jacking device, and relates to the technical field of bridge engineering, the beam body jacking device comprises supporting assemblies, the supporting assemblies are fixedly arranged at grooves in the two sides of a bridge pier, and jacking assemblies used for jacking a bridge body are fixedly arranged at the tops of the supporting assemblies; according to the bridge pier supporting device, an inserting plate is stably inserted into an inserting hole of a first transverse plate, right-angle plates on the two sides of the top of the inserting plate tightly abut against the top face of a bridge pier, the stability is further enhanced, reinforcing plates are installed on the two sides of the top of the supporting plate through bolts, and therefore the supporting strength of the supporting assembly is improved. The overall supporting strength is structurally reinforced, the supporting columns are in threaded connection with the first threaded columns through the first threaded holes, the first fixing blocks are in threaded connection with the second threaded columns, a stable supporting structure is formed in cooperation with the second base plates, and the supporting strength is improved through the multi-layer and multi-component cooperative supporting design.

The invention relates to the technical field of metal additive manufacturing, and discloses a selective laser melting forming-oriented composite support design optimization method, which comprises the following steps of: dividing a to-be-supported region into a heat-force dominated first type region and a geometrical shape dominated second type region according to geometrical characteristics and process requirements; configuring a high-rigidity high-thermal-conductivity support for the first type of area, and configuring a lightweight support for the second type of area; directional structure design is carried out on the support of the first type of area, and an internal structure with anisotropic mechanical properties is generated, so that the internal structure has high rigidity in the forming direction and low rigidity in the transverse removal direction; a post-processing reachability constraint is introduced in topology lightweight optimization, and a directional guide channel used for guiding a tool is generated in the structure; weak connection features are generated, and the spatial layout of the weak connection features is cooperatively aligned with the position of the directional guide channel. The contradiction between stability and easy removal of a traditional supporting structure is solved, and the post-processing efficiency is improved.

The present invention supports design by enabling the checking of a determination rule in consideration of material-specific characteristics or physical properties, and enabling, in the design stage, the evaluation of corrosion resistance and durability of a product to be designed.　This design support system defines a determination rule related to a combination of component materials, recognizes an adjacent component on the basis of a feature value acquired from information of a model to be designed by using a predetermined function associated with the determination rule, and determines the suitability of the combination of the materials by using the material of the adjacent component and first material determination information in which a theoretical value related to the combination of the materials is registered. The determination rule includes a threshold value of an electrochemical potential, and a theoretical value of the electrochemical potential is registered in the first material determination information. It is determined whether the combination of the materials in the adjacent component conforms to the determination rule on the basis of comparison between the theoretical value of the electrochemical potential corresponding to the combination of the materials of the adjacent component and the threshold value of the determination rule.

The application relates to a standardized design method, device and equipment of an LED splicing screen support, which comprises the following steps: acquiring splicing screen data and support data of an LED splicing screen; constructing a standardized support combination library according to the splicing screen data and the support data, in combination with a splicing screen and support comparison relationship, wherein the standardized support combination library comprises a base model and a day-shaped frame model; acquiring a support installation type and a splicing mode of the LED splicing screen; and assembling and generating entity standardized drawings of the LED splicing screen support according to the corresponding base model and day-shaped frame model from the standardized support combination library. The standardized design method of the LED splicing screen support assembles the base model and the day-shaped frame model of the constructed standardized support combination library into an entity model of the LED splicing screen support and outputs entity standardized drawings of the LED splicing screen support, so that the delivery time is reduced by at least 50%, manpower and material resources are saved, and the delivery cycle of support design drawings is shortened.

The application belongs to the technical field of additive manufacturing, and particularly relates to a weak-rigidity complex thin-wall valve seat additive manufacturing method. The method comprises the following steps: step 1, model optimization and support design; step 2, regional process parameter regulation; step 3, additive manufacturing and online monitoring; and step 4, post-processing and quality verification. The application has the beneficial effects that: firstly, the topology sandwich and reinforcing rib design are adopted, the honeycomb / dot matrix porous structure is filled between the inner and outer walls, and the radial reinforcing rib layout is combined with the overhanging area, so that the thermal stress is effectively dispersed and the local deformation is inhibited.

The invention discloses a simulation test method for an asymmetric support effect of a weakly-cemented and strongly-expansive soft rock roadway, and belongs to the technical field of coal mining. The method aims at solving the problems that in the prior art, it is difficult to truly reproduce roadway asymmetric large deformation under the weak cementing-strong expansion-rich water multi-field coupling effect, and the effectiveness of an asymmetric supporting scheme cannot be rapidly and quantitatively evaluated. According to the technical scheme, real rock mass parameters are obtained through on-site rock core sampling; similar materials are prepared based on the similarity theory, a physical model is constructed, and the surrounding rock deformation environment is reproduced in a high-fidelity mode; designing a plurality of asymmetric support schemes for simulation comparison; a non-contact full-field strain measurement system is adopted to monitor surrounding rock deformation, and an optimal supporting scheme is optimized and applied to field verification. According to the method, complex field problems are solved to a controllable laboratory environment, rapid and accurate optimization of a supporting scheme is achieved, and a scientific and reliable basis is provided for soft rock roadway supporting design.

The application discloses a steel pipe arch rib installation support design method and system considering load combination, and the method comprises the following steps: firstly, defining arch rib installation multi-source load and dividing standard combination and basic combination, establishing a support and arch rib collaborative stress integral analysis model, combining arch rib segments and bridge surface constraints to determine support topology, and configuring component parameters to form an initial scheme; secondly, extracting time-varying load effects at each construction stage, constructing a multi-objective optimization function model, and determining a global optimal objective function; then, establishing a coupling relationship between support deformation and arch rib linear, and solving optimal pre-camber through inverse analysis iteration to eliminate linear error; finally, carrying out multiple checking on the support, optimizing rod parameters and structure in combination with buckling analysis, establishing a collaborative mechanical model to complete whole-process checking, and determining final design parameters. The method realizes dual protection of arch rib installation precision and structural stability.

The utility model discloses a weighing device compatible with multi-model capsules, which mainly comprises an electromagnetic force sensor, a U-shaped guide groove with a V-shaped bottom, a guide groove support, a special-shaped double torsion spring and a modularized sensor shell, the V-shaped bottom of the U-shaped guide groove is adapted to capsules with different radians, and the guide groove is quickly replaced by combining the design of a detachable support. The problem that existing equipment cannot be compatible with various types of capsules is solved, the special-shaped double torsion springs are fixed to a support rib plate through pin shafts, gravity floating of a guide groove is dynamically counteracted, it is ensured that a 45-degree working inclination angle is stably maintained in the weighing process, the weighing precision is improved, a shell adopts a standardized interface and a modular installation groove, function expansion and rapid maintenance are supported, and the reliability is high. And the replacement cost is reduced by more than 60%. The automatic weighing device has high compatibility, anti-interference performance and convenience in maintenance, and is suitable for automatic weighing of particle products of various specifications in the fields of medicine, food and the like.

The invention discloses a design method for long and short pile supports of a soil-rock foundation pit. The design method comprises the following steps that a simulation working condition model of the soil-rock foundation pit is constructed; a first verification mode, a second verification mode and a third verification mode are preset, a full-short pile supporting structure is adopted in the first verification mode, a full-length pile verification mode is adopted in the second verification mode, a long-short alternating supporting mode is adopted in the third verification mode, and the first verification mode, the second verification mode and the third verification mode are sequentially imported into the simulated working condition model; presetting deformation parameter thresholds of the long piles and the short piles, determining specifications of the long and short piles based on the first verification mode, the second verification mode and the third verification mode, and determining a final design scheme based on the specifications of the long and short piles; and by comparing the deformation data of the pile body in different modes with a preset threshold value, a pile length combination scheme meeting safety and economical efficiency at the same time is screened out. When deformation of the long piles in a certain area in the long and short pile mode does not exceed a threshold value, the number of the short piles in the area can be reduced, and materials are saved.

The application belongs to the technical field of small gas turbine engine, and discloses a multifunctional interstage support structure design method and support structure for counter-rotating turbine. The design method comprises the following steps: designing an overall technical scheme; designing a load-bearing base; designing a variable stiffness force transmission frame; designing an equal mass wide frequency load-bearing mounting seat; and designing a double-bearing multi-pipeline and damping vibration integrated structure. The multifunctional interstage support structure for counter-rotating turbine changes the support structure form and optimizes the force transmission path; changes the stiffness of the support mechanism, improves the damping effect and anti-deformation capacity of the support structure through the design of elastic damping and other measures; arranges the double-bearing multi-pipeline and damping vibration integrated structure through the double-bearing seat shared support structure; realizes the double-bearing multi-pipeline and damping vibration integration through the arrangement of the lubricating oil inlet pipeline in the support structure. The multifunctional interstage support structure for counter-rotating turbine can meet the turbine interstage support design requirements of the high-speed rotor system of the small gas turbine engine and has engineering practical value.

The utility model relates to a multi-layer slope steel bar positioning support. The support comprises a plurality of supporting frames and a plurality of sets of supporting angle steel. The multiple sets of supporting angle steel correspond to the multiple layers of slope steel bars in a one-to-one mode, each set of supporting angle steel comprises at least two pieces of supporting angle steel, each supporting angle steel is transversely arranged among the multiple supporting frames, and the multiple sets of supporting angle steel are matched with one another to position the multiple layers of slope steel bars. By adopting a combined structure of a plurality of supporting frames and a plurality of groups of supporting angle steel, accurate positioning of multiple layers of inclined plane steel bars is realized. According to the support design, the complex structure of a traditional stiff framework is simplified, the material consumption is reduced, and the construction cost is reduced. The supporting angle steel is transversely arranged between the supporting frames to form a stable supporting system, it is guaranteed that the steel bars do not overturn in the concrete pouring process, and construction safety is improved. In addition, the support is easy and fast to install, the construction progress can be effectively accelerated, and meanwhile the positioning precision and construction quality of the steel bars are guaranteed.

A support scheme intelligent recommendation method and system based on slope engineering knowledge base belong to the technical field of slope support design. The method comprises the following steps: constructing a slope engineering special knowledge base, and grading / quantifying a multi-dimensional engineering index of the support scheme; building a three-dimensional visualization environment of slope engineering, and completing slope excavation contour design through a bias algorithm+ground model clipping; adopting a face-to-face topology intersection algorithm to realize geological zoning of slope contour surface unit level, and obtaining lithological characteristics; dividing support zoning; searching for a candidate support scheme through a composite index; and selecting a recommended scheme based on multi-dimensional engineering index comparison. The system is a special system adapted to the actual scene of slope engineering, and supports functions such as cross-platform deployment, collaborative work, internal network security, offline access, etc. The method and system can significantly improve the accuracy, compliance and design efficiency of slope support scheme selection, and are suitable for complex three-dimensional slope and multi-team collaborative engineering scenes.

This invention discloses a method for constructing a foundation pit using a prestressed diaphragm wall as a partition wall. When a foundation pit is constructed in stages and a "diaphragm wall + internal support" support system is used, different internal support designs are adopted for different foundation pit sections due to differences in the depth of the foundation pit. To address the adverse effects of different vertical arrangements of the supports on both sides of the partition wall causing the soil behind the excavated section of the wall to unload and bear the concentrated load of the horizontal supports, a diaphragm wall partition wall is proposed. Prestressed tendon ducts are pre-embedded in the wall body, and a post-tensioning technique with adjustable tension is adopted on the first excavated side according to the deformation of the wall body. The two ends of the prestressed tendon ducts of the partition wall are located at the top of the cap beam and the upper part of the bottom surface of the foundation pit on the first excavated side, respectively. By applying prestress to the top of the wall or the bottom of the first excavated foundation pit, the stress on the wall structure is improved, and the deformation of the wall body is controlled. This solves the problem of excessive bending moment and horizontal displacement of the wall body caused by the difference in the arrangement of vertical supports on both sides of the partition wall.

The invention relates to the field of thin-wall metal pipe fitting laser welding, in particular to thin-wall hardware laser machining anti-deformation equipment which comprises a main body, a mounting rod is arranged at the top of the main body, a first mounting groove is formed in the position, close to the top, of the outer wall of the mounting rod, and a lifting arm is slidably connected into the first mounting groove; a laser welding head is arranged at the bottom of the end, away from the mounting rod, of the lifting arm, a pushing assembly is arranged at the top of the mounting rod, and the output end of the bottom of the pushing assembly is connected with the lifting arm. A supporting mechanism is arranged at the position, close to the mounting rod, of the top of the body and comprises a butt joint cylinder fixedly connected with the body, and a positioning unit is arranged at one end of the butt joint cylinder. Accurate centering butt joint of the two pipe fittings can be achieved, the welding seam quality is improved, dynamic avoiding and reset supporting are cooperated, smooth welding is guaranteed, deformation is restrained, the surfaces of the pipe fittings are protected through the flexible supporting design, and the thin-wall machining requirement is met.

The invention discloses a method, medium and equipment for analyzing the stability of a tunnel bearing arch based on loosening pressure, and relates to the technical field of engineering data analys.The method comprises the steps that the height of an arch crown loosening area is delimited based on a construction numerical simulation result; the reinforced loose surrounding rock is simplified into a hinge-free bearing arch structure which is elastically and fixedly connected with the side wall; determining a load system comprising vertical pressure, horizontal pressure and support reaction force, wherein the lateral pressure coefficient of the horizontal pressure is determined through iterative optimization; a bearing arch-elastic foundation side wall collaborative mechanical model is established, and internal force is calculated; based on the Hook-Brown criterion, considering the equivalent confining pressure provided by the anchor rods, and calculating the comprehensive strength of the bearing arch composite rock mass; and calculating a compression-resistant and tensile safety coefficient to realize quantitative evaluation of the stability. By optimizing the horizontal loosening pressure load and accurately simulating the synergistic effect of the bearing arch and the surrounding rock, a scientific and economical safety evaluation means is provided for the supporting design of the super-large-span tunnel.

The invention belongs to the technical field of ribbed beam bridge wet joints, and particularly discloses an assembly type bridge deck slab structure and a construction method thereof.The assembly type bridge deck slab structure comprises T-shaped beams distributed at intervals, integrally-formed diaphragm plate sets, prefabricated slabs and a filling layer; a bracket is arranged on a flange plate of the T-shaped beam, a web plate is matched with a bearing beam plate, the prefabricated plate is fixed to the bracket, a filling seam between the prefabricated plate and the flange plate is filled with the filling layer, and a pouring platform is formed by the filling layer, the prefabricated plate and the flange plate and a bridge floor layer is laid. The construction method comprises the steps that the multiple T-shaped beams are sequentially placed at intervals, then the brackets are polished, the prefabricated plates are placed on the portions, between every two adjacent flange plates, of the brackets, the filling seams are filled with the filling layers and maintained, a pouring platform is formed, and the bridge floor layer is laid on the pouring platform. Through the integrated structure and the optimized support design, the integrity and the positioning precision of the bridge are improved, the durability is enhanced, complex procedures are not needed, the construction period is greatly shortened, the cost is reduced, and the method is suitable for assembly construction of the prefabricated beam bridge.