70results about How to "Avoid Destabilization and Destruction" patented technology

The invention discloses a coal-mining roadway scour-preventing and energy-absorbing combined metal support and an assembly method, and belongs to the field of coal mine safety supporting. The device comprises an outer round steel support, an inner round steel support and energy-absorbing support devices. The metal support and the assembly method are based on the supporting idea of quick energy absorbing abdicating for scour preventing, reasonable round roadway cross-section supporting is adopted, two retractable big and small metal rings form a main framework, and special distributed connecting devices are key energy-absorbing members, so that a combined metal support structure with double protection functions is formed. When unexpected large shock, deformation or burst of surrounding rocks occurs, a rapid and controllable deformation abdication process is realized through effectively match between the inner and outer rings and the energy-absorbing devices, impact energy of the surrounding rocks can be absorbed to the utmost and dissipated simultaneously, buckling failure of an overall support structure and a roadway surrounding rock system is avoided, and staff and production equipment in a roadway are prevented from being injured or damaged.

Provided is a crush rock slope anchorage pier type active protective net structure. The overall stability of a slope is effectively improved, and crush block bodies can be effectively protected. The crush rock slope anchorage pier type active protective net structure comprises longitudinal supporting ropes, horizontal supporting ropes, an anchorage pier, an anchoring component and a high-strength steel rope net. The longitudinal supporting ropes and the horizontal supporting ropes are arranged on the face of the slope in a mesh shape. The anchorage pier and the anchoring component are arranged at mesh nodes. The anchorage pier is fixedly connected with the longitudinal supporting ropes and the horizontal supporting ropes at the mesh nodes. The two ends of the anchoring component are connected with the anchorage pier and a stable rock stratum in an anchoring mode. The high-strength steel rope net is arranged on the slope in a paving mode in a curve shape and is connected with the longitudinal supporting ropes and the horizontal supporting ropes on the peripheries of meshes through sewing lines, and the high-strength steel rope net is divided to be in a mesh shape.

The invention belongs to the field of side slope and bank slope protection engineering, and discloses an anti-seepage and anti-freezing protection system for bank and side slopes of a reservoir in a cold region. The anti-seepage and anti-freezing protection system comprises a foundation embedded in the side slope. A gravel cushion layer, a composite anti-drainage plate and a Renault protection padare sequentially laid from inside to outside on the slope surface of the side slope from the foundation to a set height of the side slope, wherein the set height of the side slope is higher than a surge water level. The anti-seepage and anti-freezing protection system further comprises one-way drainage pipes, wherein the one-way drainage pipes comprise a bottom one-way drainage pipe and a top one-way drainage pipe. The water inlet section of the bottom one-way drainage pipe penetrates through the foundation and extends into the side slope. The water inlet section of the top one-way drainage pipe penetrates through the Renault protection pad, the composite anti-drainage plate and the gravel cushion layer sequentially and extends into the side slope. The invention further discloses a construction method of the anti-seepage and anti-freezing protection system for the bank and side slopes of the reservoir in the cold region. The anti-seepage and anti-freezing protection system is simple in structure, reliable in function, convenient to construct, long in service life, and capable of effectively preventing erosion damage and seepage damage to the bank and side slopes of the reservoir,greatly weakening freezing and thawing damage to the side slope, and ensuring long-term stability of the bank and side slopes of the reservoir.

The invention relates to a protection construction of a vegetation concrete side slope, aiming to effectively avoid the destabilization and the damage of a side slope and be favorable to the growth of green plants on the side slope. The protection construction of the vegetation concrete side slope comprises concrete building blocks (10) which are laid along the side slope surface to close the side slope surface and are formed by compounding a porous loose layer (11) and a compact layer (12), and the porous loose layer (11) is internally provided with alternate soil holes (11a) which longitudinally extend downwards from the upper surfaces of the concrete building blocks (10) and internally filled with planting soil. The invention has the advantages of effectively preventing rainwater from seeping downwards, preventing a water flow from eroding the side slope, preventing the water of a soil body of the side slope from evaporating, avoiding the destabilization and the damage of the side slope and being favorable to the growth of green plants on the side slope. The invention is particularly favorable to the protection of expansion rock side slopes needing leakage resistance and moisture preservation and can be also used for protecting other soil side slopes.

The invention relates to a post-arranged inner supporting structure for partitioned excavation of a super-large deep foundation pit and a construction method. The method is characterized in that an outer support pile, an inner support pile and a pile top solidified soil layer are arranged on the outer side wall of the foundation pit firstly, and lower top beam positioning bar bodies and upper top beam positioning bar bodies are implanted in the inner support pile; then step-slope excavation is conducted on soil in the middle of the foundation pit from the middle to the two sides of the foundation pit, and a pit bottom drainage layer, a geogrid layer, a post-cast strip ground beam, anti-floating anchors and a solidified cement soil layer are arranged in the positions, at the bottom of the foundation pit, of the excavated area; and a post-arranged inner support is arranged between an adjustable bracket on the post-cast strip ground beam, and a pile top beam, then soil below the post-arranged inner support is excavated, pit bottom reinforcing piles, a pit bottom drainage layer, pit bottom drainage ditches and a solidified cement soil layer are arranged at the pit bottom below the post-arranged inner support, and finally, the post-arranged inner support is removed. The force-bearing behavior of a foundation pit supporting system can be improved, in addition, the excavation rate of the foundation pit can be increased, and the amount of materials for foundation pit supporting can be decreased.

The invention provides a partial filling type double-sleeve buckling-preventing support. The core-replaceable partial filling type double-sleeve buckling-preventing support can consume a large amount of earthquake input energy, reduces the damage to the structure under rare occurrence earthquakes, connects energy consuming cores and a node elastic region through a detachable bolted connection method, can also achieve post-earthquake replacement of the energy consuming core, reuses a restraint unit, and lowers repairing and replacement cost. The core-replaceable partial filling type double-sleeve buckling-preventing support at least comprises (1) the linear type energy consuming cores, (2) an internal steel sleeve restraining the linear type energy consuming core from partially buckling, (3) an external steel sleeve guaranteeing the overall stability of the support, (4) concrete filler between the internal steel sleeve and the external steel sleeve, (5) supporting node stiffening plates, (6) bolt connecting plates and bolts between the energy consuming cores and the supporting node stiffening plates, and (7) steel channel stiffening ribs. The core-replaceable partial filling type double-sleeve buckling-preventing support is convenient to support and is designed flexibly, the internal steel sleeve mainly prevents the linear type energy consuming cores from partial buckling and damage, the outer steel sleeve and the concrete filler mainly prevent the entire support from buckling failure, and the function of the internal steel sleeve and the function of the external steel sleeve are relatively independent. The core-replaceable partial filling type double-sleeve buckling-preventing support has the advantages of being low in machining cost, light in self-weight, good in economic benefit, convenient to construct and the like.

The invention discloses a bamboo-wound pipe and cast concrete integrated column for buildings and a preparation method of the bamboo-wound pipe and cast concrete integrated column for the buildings. The column comprises a protection layer, a bamboo-wound decoration structure, a middle bamboo-wood combined winding structure and an inner concrete structure sequentially from outside to inside. The bamboo-wound decoration structure is formed by uniformly and continuously winding bamboo fibrous belts and lining mesh belts through resin glue in an annular and longitudinal plane winding combined manner. The middle bamboo-wood combined winding structure is formed by winding transverse bamboo split units or transverse wood veneers and longitudinal fibrous materials in an annular and longitudinal winding combined manner, wherein the winding angle is 25-86 degrees. Due to the fact that the inner concrete is under protection and binding functions of a bamboo-wound pipe, natural erosion and buckling failure are avoided, and long service life, low cost, remarkable energy saving and emission reduction effects and considerable economic benefits are achieved.

The invention discloses an antifreeze anti-erosive protection structure of a hydrous slope of a cold region. The antifreeze anti-erosive protection structure of the hydrous slope of the cold region comprises a foundation, wherein the foundation is arranged on a riverbed at a slope toe of a bank side slope; the top surface of the foundation and the top surface of the riverbed have the same height;an XPS insulation board and a composite drainable waterproofing plate are sequentially arranged from the inner side to the outer side on the side slope surface of the bank side slope from the top surface of the foundation to the top part preset height; the outer side of the composite drainable waterproofing plate is provided with a gabion retaining wall from the top surface of the foundation to the surge height; the outer side of the composite drainable waterproofing plate is provided with a reno mattress from the surge height to the top part preset height; the top part preset height is largerthan the surge height; and one-way drainage pipes are arranged in a plum blossom dot matrix way on the side slope surface of the bank side slope between the top surface of the foundation and the toppart preset height. The invention further discloses a construction method of the antifreeze anti-erosive protection structure of the hydrous slope of the cold region. The antifreeze and anti-erosive capacities of the hydrous slope of the cold region can be effectively improved.

The invention discloses a gob-side entry driving small coal pillar high-pressure grouting strengthening and supporting method. The gob-side entry driving small coal pillar high-pressure grouting strengthening and supporting method comprises the following steps that (1) after a tunnel is subjected to machine driving and shaped, a top plate of the tunnel is subjected to construction of conventionalanchor rods, high-intensity anchor rods and pre-stressed force anchor cables, and corresponding anchor screens are paved for supporting the tunnel; (2) small coal pillars in the tunnel of the step (1)is subjected to construction of a plurality of rows of conventional anchor rods, high-intensity anchor rods and hollow grouting anchor cables in sequence, high-pressure cement concrete slurry is grouted into the hollow grouting anchor cables through a grouting pump, the length of the anchor cables meets the requirements for strengthening width of the small coal pillars, and the conventional anchor rods, the high-intensity anchor rods and the hollow grouting anchor cables are fixed together by a reinforcing bar ladder beam on the contacting wall surface of the small coal pillars and the tunnel; and (3) the multiple rows of the conventional anchor rods are drilled into a solid coal bed of the tunnel in the step (2). The gob-side entry driving small coal pillar high-pressure grouting strengthening and supporting method can perform high-pressure grouting on the gob-side entry driving small coal pillars, the small coal pillars can be strengthened, and the deformation of the tunnel can be reduced.

The invention specifically discloses a grouting pressure stabilizing device and a mounting method. The grouting pressure stabilizing device comprises a bracket, wherein an energy storing device is arranged on the upper part in the bracket; a serous fluid buffering cylinder is arranged on the lower part; one end of the energy storing device is fixed on the bracket while the other end is connected with a piston of the serous fluid buffering cylinder; the energy storing device comprises two guiding plates, guide rails and a plurality of springs fixed between the two guiding plates; the guiding plates and the springs can move back and forth along the guide rails under an effect of grouting pressure; the springs fixed between the two guiding plates are rotationally symmetrically distributed about an axial central line of the two guiding plates. During a working process, when the grouting pressure is rapidly increased, the springs are compressed by the serous fluid through a piston rod and the energy storage of the energy storing device and the energy-consuming pressure reduction of the serous fluid are realized, and when the grouting pressure is rapidly reduced, the elastic potential energy is released by the compressed springs and the energy-increasing pressure boosting of the serous fluid is realized.

The invention relates to a post-earthquake recoverable functional frame supporting system with an additional lateral-resisting energy consumption device, and belongs to the field of structural engineering. The design concepts of damage control, replaceable energy-consuming elements, bending moment amplitude modulation, vertical bearing and horizontal lateral-resisting separation and the like are applied, and the advantages of a traditional rigid connection column system and a traditional hinging column system are combined; a column bottom support is made of a shape memory alloy, thus the stress performance of joints is improved, and the service life is prolonged; through reasonable design, bending moment amplitude modulation is achieved, column bending moment is reduced to protect a columnagainst being damaged, meanwhile, the replaceable lateral-resisting energy consumption device bear main lateral-resisting work, and damage to the joints is avoided in a joint reinforcing mode; and after an earthquake, functions of the anti-bending hinged column foot frame supporting system can be recovered only by replacing the lateral-resisting energy consumption device.

A bottom beam for a roadway hydraulic support high in energy absorption speed, burnt resistant and floor heave resistant is characterized in that a plurality of burst energy absorption unit mounting cavities are evenly distributed in a counter-arch variable section box beam, burst energy absorption units are located in the burst energy absorption unit mounting cavities, carbon fiber cloth is located below the burst energy absorption units and is tightly attached to the bottoms of the burst energy absorption units, the end of the carbon fiber cloth is fixedly connected to the counter-arch variable section box beam, each burst energy absorption unit comprises an energy absorption block and a burst block, with the energy absorption block being located above a top board of the burst block and the top of the energy absorption block being tightly attached to the upper wall of the corresponding burst energy absorption unit mounting cavity; the sidewall of each burst energy absorption unit mounting cavity is provided with guide ribs, and side boards of the burst blocks are provided with guide grooves; the guide ribs are located in the guide grooves; the burst blocks are in sliding fit with the sidewalls of the burst energy absorption unit mounting cavities; the energy absorption blocks are made of metal thin-walled tubes filled with porous foam alloy material; the upper and lower end faces of each energy absorption block are planes parallel to each other; the upper end face of the top board of each burst block is planar; the lower end face of the bottom board of each burst block is arced.

The invention discloses a method for researching fatigue damage judgment of strain hardened soil under cyclic dynamic load, and solves the problem of lacking in a soil strain hardened characteristic judgement method under cyclic dynamic load. A parameter for reflecting the soil strain hardened capability under cyclic dynamic load is provided; a fatigue damage expression suitable for a three-dimensional stress state is established; on the basis of strain hardened characteristics, a method for judging fatigue damage of strain hardened soil by adopting a low-cycle fatigued damage evolution modelis provided; and a strain hardened soil fatigue damage evolution rule under cyclic dynamic load and an influence factor thereof are determined. According to the method in the invention, an establishedstrain hardened soil fatigue damage model by taking mudded intercalation as an example can lay the foundation for researching engineering characteristic deterioration mechanism of the mudded intercalation under cyclic dynamic load, such as natural earthquake, blasting vibration and traffic load; and a new approach is provided for effectively preventing the complex rocky slope containing mudded intercalation and instability and failure of a dam foundation in a dynamic load condition.

The invention relates to a regenerator pore plate structure of a catalytic cracking device. The regenerator pore plate structure of the catalytic cracking device comprises a flat head 1, a skirt 2 and a regenerator shell 3, wherein wear-resistant short pipes 11 are uniformly distributed on the flat head 1; the upper end of the skirt 2 and the flat head 1 are fixedly connected together; the lower end, with a circular arc section end part, of the skirt 2 is fixedly connected with the regenerator shell 3. The pore plate of the regenerator pore plate structure of the catalytic cracking device provided by the invention can freely expand in a radial direction, so that not only can a phenomenon that the regenerator shell and the pore plate are damaged by destabilization due to overlarge local stress of the regenerator shell and the port plate at a connecting part be better prevented, but also a liner at the connecting part of the port plate and the shell can be better prevented from being damaged, and thus the local overheating operation of the equipment shell is avoided.

The invention relates to a large-net-clearance self-resetting steel frame center bracing system, and belongs to the field of structural engineering. All components of the system are machined by a factory and mounted in a connected manner by the aid of high-strength bolts, high requirements for component machining precision and quality can be easily met, rapid assembly is easily realized, and the system conforms to the concept of assembled green steel structures. The diagonal bracing system is an assembled buckling-restrained Y-shaped brace, an energy dissipation element is arranged at a diagonal bracing position, the overall stability and structural lateral load resistance of the diagonal bracing system are improved, a door opening can be formed in the position of the brace, so that the design form is more flexible, and different structural forms can be met. By adding a novel combined self-resetting device, the overall bearing capacity of a beam can be improved, over-stress load applied to an I-beam section caused by pulling cable pretension in the combined self-resetting device can be avoided, pre-stressed cable pretension is applied, so that the structure can control developmentof plastic deformation and damage accumulation, and the structure has good anti-seismic property and resetting capacity.

The invention provides a steel tube concrete support connecting structure and a connecting construction method thereof. The connecting structure comprises a first section of a steel tube concrete support, a steel tube, particles, a connecting mobile column, a steel washer, a second section of the steel tube concrete support and a concrete core. The connecting construction comprises the steps that both ends of the first section of the steel tube concrete support and the second section of the steel tube concrete support are provided with empty tube sections without concrete, the first section of the steel tube concrete support is connected with the second section of the steel tube concrete support by the connecting mobile column, and the tail end of the first section of the steel tube concrete support and the tail end of the second section of the steel tube concrete support are filled with the particles. The steel tube concrete support connecting structure can connect multi-section steel tube concrete into supports of all shapes, is simple in operation, simplifies construction technology, has good anti-impact and dynamic pressure performances, and can be widely applied to the supporting of soft surrounding rock and roadway with the properties of large deformation and uneven force bearing.

The invention discloses a concrete filled steel tube column-H-shaped steel beam-steel support-pi-shaped connecting piece combined type middle column middle joint and a manufacturing method. The connecting structure comprises light square steel tube recycled concrete columns, H-shaped steel beams, pi-shaped connecting pieces, web connecting plates, high-strength bolts, steel supports, I-shaped bench steel tie bars, plate column steel tie bars and prefabricated recycled concrete local floors. Novel assembly type joint connecting and reinforcing structures such as pi-shaped connecting pieces andI-shaped stool steel tie bars are creatively provided, the overall assembly difficulty of beam-column-support-floor slabs in a joint area is effectively lowered, and the integrity, bearing capacity and deformation capacity of the joint are remarkably improved. Compared with the prior art, the joint has the advantages that the structure is simple, construction is convenient, the force transmissionpath is clear, and two anti-seismic defense lines are provided. The beam-column-support-floor slab of the joint is firm in connection, high in integrity and excellent in anti-seismic property, and keytechnical support is provided for engineering design of a light steel composite structure of an assembly type green house.

The invention relates to a construction method for a movable anchoring steel plate ground wall guide wall. The construction method comprises the following steps that (1) a ground fixing plate is arranged in advance and fixed; (2) an excavation groove used for lowering a soil retaining plate is excavated in the excavation direction of the preset ground wall; (3) a soil retaining plate is lowered into the excavated groove, the soil retaining plate is made to be tightly attached to the wall of the excavated groove, and the soil retaining plate is fixedly connected with the ground fixing plate; (4) the steps (1)-(3) are repeated, after the requirements are met, a ground wall groove is excavated along the pre-designed ground wall position, and after excavation is completed, a reinforcement cage is put down, and a ground wall is poured; and (5) removing the soil retaining plate and the ground fixing plate. The method is applied to foundation pit engineering, the movable anchoring steel plate ground wall guide wall is developed, the ground wall is rapidly excavated, and the method has important significance on rapid construction.