605results about "Foundation repair" patented technology

The invention relates to a pile foundation reinforcement method and system based on a karst area, and belongs to the technical field of foundation treatment and reinforcement. The pile foundation reinforcement method comprises the steps that a karst area pile foundation monitoring network is established, and karst cavity distribution characteristic parameters and underground water dynamic change parameters are obtained; constructing an adaptive evaluation model, and setting an initial real-time feedback correction parameter vector; based on a spatio-temporal evolution rule, generating a karst development comprehensive complexity index of dynamic evolution; a grading response mechanism is established, and pile foundation reinforcement early warning and response measures of corresponding grades are triggered; and constructing an intelligent decision-making system, and continuously optimizing an evaluation model and a reinforcement strategy through a feedback mechanism. According to the method, the karst development comprehensive complexity index is generated by introducing the underground water dynamic change parameters and combining the karst cavity distribution characteristic parameters, the evaluation of the geological environment is expanded from a static time point to a dynamic evolution process, and the comprehensiveness and accuracy of the evaluation are improved.

Disclosed herein are systems and methods for repairing and / or replacing a pile. In a specific embodiment, a system for repairing a pile includes: an elevating sleeve, where the elevating sleeve includes a top, a bottom, and a contiguous side wall spanning between the top and bottom, where the top is substantially closed, and the bottom is open, where the elevating sleeve is configured to fit over a top of a pile to be repaired, and where the elevating sleeve includes an input port and output port; one or more seals, where at least one seal includes an outer diameter shaped to fit within the elevating sleeve at or near the bottom of the elevating sleeve and an inner diameter to fit over the top of the pile to be repaired; one or more plugs; and a pump.

The invention discloses a saturated soil foundation reinforcement method and system based on multi-field coupling, particularly relates to the technical field of geotechnical engineering reinforcement, and is used for solving the problems of parameter mismatch, material waste and secondary deformation caused by lack of dynamic coupling analysis in an existing grouting process. The seepage pressure, the soil deformation rate and the slurry diffusion rate are obtained in real time; generating a multi-field collaboration parameter and correcting the multi-field collaboration parameter; identifying an abnormal region of seepage and deformation direction deviation; extracting a seepage gradient and a diffusion main direction to generate correction parameters; performing staged gradient grouting; dynamically optimizing the parameter gradient and interval; outputting a stable state control parameter; and through multi-field data collaborative analysis and closed-loop feedback control, dynamic matching of grouting parameters and stratum response is achieved, and the reinforcement precision and the engineering reliability are remarkably improved.

The invention discloses a cast-in-place pile directional sliding device and a sliding method thereof, and relates to the technical field of civil engineering construction. The connecting assembly comprises a first connecting piece and a second connecting piece, and the first connecting piece and the second connecting piece are fixed to the side wall of the cast-in-place pile and distributed on the upper side and the lower side of the center of the cast-in-place pile; the sliding assembly comprises first horizontal sliding rails erected on the two sides of the protection wall. The pushing telescopic piece is located below the second connecting piece, and the pushing telescopic piece is used for driving the cast-in-place pile to ascend and descend; the first connecting piece can be upwards separated from the first horizontal sliding rail or downwards placed on the first horizontal sliding rail through lifting of the cast-in-place pile; the first side pushing telescopic piece is fixed to the first horizontal sliding rail and used for driving the cast-in-place pile to slide in the length direction of the first horizontal sliding rail. By the adoption of the scheme, the engineering piles exceeding the standard allowable deviation can be moved to the designated position, and the problems of pile refilling and the like are avoided; and the problem pile processing time is shortened, and the construction efficiency is improved.

The invention relates to the technical field of underneath pass existing station construction, in particular to an underneath pass existing station underground excavation construction pile foundation jack force application control method and system. Information such as the position of a construction pile in an underneath pass construction area, the load of an existing station, existing station bottom plate stiffness and geological information of a stratum where the construction pile is located is collected; and constructing a finite element analysis model by using the information, and simulating stress change sample data generated when the plurality of construction piles are subjected to stress change by using the finite element analysis model. And then fitting the stress change sample data, and constructing a stress relation model reflecting the stress change relation of different construction piles. When pressure analysis is carried out, if the pressure is unbalanced, the stress relation model can be used for carrying out force application adjustment control on the abnormally stressed construction pile, so that the situation that local stress unbalance is aggravated is avoided.

The utility model belongs to the technical field of existing building expansion construction, and discloses a pile-to-column reinforcing construction device, which aims to solve the technical problems existing in the prior art that a pile foundation is adopted to form an underground space through downward digging of the pile foundation, and comprises a raft plate arranged on the upper portion of an original pile, and drilling anchoring holes are longitudinally formed in the periphery of the raft plate. Longitudinal load-bearing steel bars are anchored in the drilling anchoring holes and located on the outer side of the original pile, the tops of the longitudinal load-bearing steel bars penetrate through and are fixed to the original bearing platform, columns are arranged on the top of the original bearing platform, formworks are arranged on the peripheries of the longitudinal load-bearing steel bars, pouring pipes are connected to the formworks, and the pouring pipes penetrate through the original floor slab and then are connected with pouring funnels. And a concrete layer is poured between the template and the original pile. By means of the characteristics of a building structure and a high-position pressurization method, pouring of concrete of the enlarged section is improved, the concrete is compacted through the pressure of the concrete, and the phenomenon that pouring of concrete at the bottom of an original bearing platform and a newly-added section is not compact is avoided.

The invention discloses a urease-producing microorganism induced calcium carbonate deposition solution for foundation reinforcement and a preparation method and application thereof, and belongs to the technical field of foundation reinforcement. The urease-producing microorganism induced calcium carbonate deposition solution comprises a bacterial solution, a cementing solution and a sodium citrate solution, the bacterial liquid comprises bacteria capable of generating urease and citrobacter freundii. Sodium citrate in the urease-producing microorganism induced calcium carbonate deposition solution can chelate free calcium ions in advance, the concentration of the free calcium ions is reduced, the risk of precipitation at an injection port in the single-phase injection process is eliminated, and the solution can smoothly permeate into a deep layer; citrobacter freundii produces acid through metabolism and utilizes citric acid radicals through metabolism to ensure gradual release of calcium ions, so that uniform deposition of calcium carbonate is triggered. Through the synergistic effect of sodium citrate chelated calcium ions and citrobacter freundii metabolism, the solution can be uniformly distributed in the soil sample, and the problem of uniformity of single-phase perfusion is successfully solved.

The invention relates to the technical field of undersea pile foundation scour prevention, and discloses an undersea pile foundation bottom scour prevention reinforcing device and method.The undersea pile foundation bottom scour prevention reinforcing device comprises a base, a clamping mechanism is arranged in the base and used for clamping a pipe pile, and the pipe pile is located on the inner side of the base and can reinforce silt around the pipe pile; according to the device, the foundation pit position of the pipe pile can be filled and buried by utilizing the stone filled during anti-scouring, scouring can be prevented, the silt scoured at other positions can be blocked and intercepted, the surrounding of the pipe pile is further reinforced through the intercepted silt, the whole device is recycled after the pipe pile is removed, and the foundation pit position of the pipe pile can be filled and buried by utilizing the stone filled during anti-scouring; the tubular pile can be clamped and fixed, shaking during penetrating is prevented, the foundation around the tubular pile can be isolated, silt can be isolated, the tubular pile can be prevented from being scoured and taken away, and the tubular pile can be drilled into deeper rock to be fixed.

The invention discloses a concrete structure crack control repairing method under unfavorable geological conditions, and relates to the technical field of concrete structure crack repairing, and the method comprises the following steps: S1, crack pretreatment: adopting a laser-ultrasonic wave composite cleaning technology to remove impurities of cracks, and combining a three-dimensional CT scanning technology to mark crack three-dimensional distribution and risk grade; s2, intelligent grouting repair; s3, surface nano coating; s4, releasing and reinforcing stress; s5, enhancing biomineralization; s6, installing an intelligent monitoring system; s7, layered grouting treatment; and S8, regularly maintaining and dynamically repairing. Through the synergistic effect of the step S1, the step S2 and the step S3, accurate control over the whole process from crack cleaning, filling to surface protection is achieved, compared with traditional high-pressure water cleaning, the surface roughness is improved, and meanwhile an accurate foundation is laid for follow-up repairing; through the steps S4, S6 and S8, a closed-loop maintenance system with active stress regulation and control, real-time monitoring and autonomous healing is constructed, a microcapsule self-repairing agent is released to a high-risk area, and the self-healing efficiency is improved.

The invention discloses an old station building and railway foundation reinforcing method, and belongs to the technical field of building construction. The method comprises the following steps that construction preparation is conducted, specifically, a fence is arranged in a platform construction area, and pipelines are arranged; driving fender posts; a foundation pit is excavated, and net spraying treatment is conducted on the exposed face of the fender post; the soil layer below the pit bottom is subjected to grouting reinforcement; grouting reinforcement is conducted on the lower portion of the railway track; reinforcing beams and reinforcing rafts are constructed on the tops of the existing pile foundations; and the platform is recovered according to the partition construction mode, and the fences are dismantled. By means of the combined technology of fender post supporting, pit bottom grouting, reinforcing beam raft reinforcing and line station track grouting, all-directional reinforcing of the station building structure, the foundation and foundation soil is achieved, the integrity and the anti-settling capacity of the structure are remarkably improved, the operation influence is reduced to the minimum through subarea construction, and the construction period is shortened. The method is especially suitable for reinforcement engineering of pile foundation old station buildings.

The invention discloses a magnetic orientation steel fiber 3D printing concrete quick release slip form nozzle supporting manual feeding, and belongs to the field of additive manufacturing. Comprising an anti-gravity printing module for controlling a spiral extrusion structure to rotate by utilizing a power output structure so as to convey concrete to a spray head at an outlet of a hopper in an anti-gravity manner; the magnetic orientation module is used for generating magnetic force along the axis direction of the spray head; and the sliding formwork module is used for providing temporary support for 3D printing concrete in the lining repairing process and restraining the concrete extruded by the spray head in a cavity formed between a sliding formwork and a lining. The anti-gravity printing module solves the problem that manual feeding is incompatible with a traditional concrete repairing lining method based on 3D printing, the magnetic orientation module avoids winding of steel fibers and achieves quick disassembly and quick change of a spray head, and the sliding formwork module provides temporary support; and the possibility of stripping and falling of the 3D printing concrete on the tunnel vault in the anti-gravity direction is reduced, and good application prospects are achieved.

The invention discloses a plugging particle, a preparation method, application and a grouting material, the plugging particle is of a core-shell structure and comprises a force-bearing inner core, the force-bearing inner core is coated with an expansion functional layer, and the expansion functional layer is coated with a delayed hydrogel outer film layer; wherein the inner core is made of one or more of quartz sand, kaolin and inorganic fibers; the expansion functional layer comprises modified bentonite and a super absorbent polymer; the delayed hydrogel outer film layer comprises a water-soluble film; the particle size of the blocking particles is 0.5 to 2.5 mm; through material structure optimization and response mechanism design of the functional plugging particles and the special grouting liquid, the automatic plugging function in the grouting process without mechanical triggering, a chemical expanding agent and a complex plugging device is achieved; and the method is suitable for scenes with high requirements on plugging precision, construction efficiency and structural stability in complex rock mass crack grouting engineering.

The invention relates to a construction quality monitoring method and control system for high-altitude large-volume fan foundation concrete, and the method comprises the steps: A, collecting a state video of concrete in concrete construction, and carrying out the super-definition visual effect processing of the state video; b, maintaining the internal and external temperature difference of the concrete within a preset range through a temperature measuring element; c, calculating a black plug matrix and a neighborhood value according to the concrete surface image, screening out screened images meeting requirements, splicing all the screened images to generate a concrete surface general drawing, and extracting crack characteristics of the concrete surface; starting a grouting module to perform intelligent grouting according to the crack characteristics; and D, calculating the spatial variability of the impact response strength, the average impact response strength and the concrete layer strength quality characteristics to obtain a hardness detection result, and executing the step B and / or the step C according to the hardness detection result. According to the invention, accurate temperature control and high-sensitivity crack detection in concrete construction can be realized, and the quality of concrete and the reliability of the whole structure are greatly improved.

The invention discloses an anti-loosening detecting and reinforcing device for a wind power building anchoring device, and belongs to the technical field of safety monitoring and maintenance of building foundation structures. According to the technical scheme, the anti-loosening detecting and reinforcing device for the wind power building anchoring device comprises a supporting column and a foundation pile body, a mounting plate is arranged at the bottom of the supporting column, the mounting plate is fixedly connected with the foundation pile body through anchoring assemblies, and at least six sets of anchoring assemblies are arranged in the circumferential direction of the mounting plate at equal intervals; a plurality of groups of tensioning mechanisms are arranged between the foundation pile body and the supporting column; the pre-tightening force of each anchoring point is monitored in real time through the pressure detection gaskets arranged in the circumferential direction, automatic detection and reinforcement of the loosening state of the anchoring system are achieved in combination with dynamic compensation of the corresponding tensioning mechanism, structural unbalance caused by local loosening is prevented, and the reliability of the anchoring system is improved. The device has the advantages that the change of the pre-tightening force of the anchoring point is monitored in real time, the pre-tightening force of the loosened anchoring point is automatically compensated, chain reaction caused by local loosening is prevented, and the perpendicularity of the supporting column is maintained.

The invention discloses a geogrid and EICP synergistically reinforced soil embankment structure and a construction method, and relates to the technical field of soil embankment structures. Comprising a pavement base layer, an embankment bearing layer and a natural soil foundation layer, and the natural soil foundation layer is used as a soil embankment structure support and is arranged at the bottommost layer; the pavement base layer is used for bearing an upper driving load and uniformly transferring the upper driving load to the embankment bearing layer below; and the embankment bearing layer is used for bearing the upper load transmitted by the pavement base layer. The engineering performance is improved through the multi-layer synergistic effect, the core reinforcing layer is of an innovative space grid structure and is composed of a prefabricated geogrid, a grid support arranged in the inclined direction and a rigid stress plate frame, a three-dimensional force transmission network is formed, the limitation of a traditional reinforcing method is broken through, and the engineering performance is improved. In addition, the grating support is arranged at a specific angle, the structural rigidity is guaranteed, and the stress concentration phenomenon is avoided.

The invention relates to a construction technology and a construction method for a composite pile foundation by recycling old piles. The method comprises the steps that firstly, a soil body is excavated to a certain depth on an old pile foundation, the integrity and durability of old piles are detected, and the old piles which do not meet the recycling requirement are cut off and abandoned; in order to improve the bearing capacity of the foundation, new cast-in-situ bored piles are complementarily driven below the elevation of the cut-off old piles, and a new and old pile combined bearing structure is formed; leveling the pile heads of the cut old piles and new piles, binding steel bars, and pouring to form a reinforced concrete laminated slab; and a second layer of new piles are constructed above the laminated slab, pile heads of the new piles and the reserved complete old pile heads are connected through a bearing platform to jointly bear, and finally the laminated pile foundation with the high bearing performance is formed. The use amount of new piles in old building and bridge reconstruction can be remarkably reduced, and carbon emission of a newly-built pile foundation project is reduced. Moreover, the second-layer structure of the laminated pile foundation can be backfilled with soil and can also be combined with underground parking lots, underground markets and the like, and a new building underground space utilization scheme is provided.

The invention discloses a broken rock stratum pile foundation hole collapse post-grouting reinforcement construction method which comprises the following steps: S1, for a broken rock stratum area hole collapse pile foundation, backfilling a collapse hole, and after backfilling of the collapse hole is stable, annularly arranging grouting holes along the periphery of the pile; s2, a sleeve valve grouting pipe is embedded in the grouting hole; s3, preparing cement slurry, calculating the use amount of cement and water according to a water-cement ratio, and uniformly stirring for later use; s4, grouting is conducted in the grouting holes according to the low-pressure multi-time grouting principle, grouting is stopped when the grouting pressure reaches a preset value and grout returns from the holes, or grouting is stopped when the grouting amount exceeds two times of the volume of pile body concrete; and S5, after grouting is completed, the sleeve valve grouting pipe is reserved, and the sleeve valve grouting pipe and the cement paste form a supporting structure. Potential safety hazards caused by hole collapse of the pile foundation can be effectively reduced, the bearing capacity of the pile foundation is remarkably improved, and the stability of an engineering structure is guaranteed.

The invention discloses a device and a method for completely transmitting a newly-added load of an existing building to an anchor rod pile, and the breakthrough technical effect that the newly-added load of the existing building is completely transmitted to a newly-added pile foundation bearing platform is achieved through accurate calculation, flexible isolation, accurate load underpinning and original foundation base stress recovery. It is ensured that the newly-added load is completely borne by the newly-added anchor rod piles, and distribution characteristics of the newly-added load are accurately calculated by establishing a building structure-foundation-foundation collaborative stress model; the flexible isolation layer is innovatively designed, and the transmission path of the newly-added load to the original foundation is effectively cut off; and a vertical deformation barostat is researched and developed, plastic deformation of the vertical deformation barostat is utilized, then the newly-added anchor rod pile is always in a preset stress state after being loaded, and the stability of the stress state of an original foundation in the load transfer process is ensured. The method is suitable for the working condition that the bearing capacity of the base is insufficient due to storey adding, functional transformation and the like of the existing building, the reinforcement cost can be reduced by about 35%, the construction period can be shortened by about 40%, remarkable economic and social benefits are achieved, and a brand new technical path is provided for foundation reinforcement of the existing building.

The invention relates to a construction method of an offshore sludge solidified soil-riprap mixed anti-scouring structure, the anti-scouring protection structure sequentially comprises a riprap layer, a high-fluidity strong-compactness flow state solidified soil layer and a low-fluidity high-strength flow state solidified soil layer from bottom to top, and the anti-scouring protection structure is formed by sequentially filling during construction; the riprap layer is poured into the scouring pit by a certain depth, the high-flowability and high-density flow state solidified soil is formed through self-leveling pouring based on the riprap layer, and the low-flowability and high-strength flow state solidified soil layer is formed through self-leveling pouring based on the high-flowability and high-density flow state solidified soil. According to the invention, the riprap layer is combined with the high-flowability strong-compactness flow-state solidified soil and the low-flowability high-strength flow-state solidified soil which are different in strength and anti-scouring performance, so that the problem of poor protection effect of the riprap protection layer caused by riprap pore scouring is avoided; and the high construction cost caused by full-pouring anti-scouring flow state solidified soil is also reduced.

The invention relates to the field of flow-state solidified soil testing devices, and particularly discloses construction equipment and a construction process for scouring and repairing flow-state solidified soil for an offshore wind turbine foundation. Comprising an overwater carrying carrier, and a material mixing pool, a water adding stirring pool, a material conveying pipeline, a material conveying pump, a slurry conveying mechanism, a flow state solidified soil scouring performance testing device, a solidified soil rotational rheometer, a fluidity test bed, a detection material taking mechanism and a control center which are arranged on the carrier. The construction device is a complete technical system covering performance integrated testing, site construction real-time detection and complex environment coupling simulation, the dual problems that research and development of a flow-state solidified soil material is lagged and site repair quality control is insufficient are effectively solved, and the safety and reliability of offshore wind turbine foundation scouring repair engineering are guaranteed.

The invention discloses an underground engineering leakage treatment device, which comprises a magnetic leakage stopping slurry containing superfine cement, magnetic powder, an early strength agent, a flocculating agent, a water reducing agent, a water-borne epoxy resin emulsion, an epoxy curing agent and water; the thick iron plate is fixed at the rock wall crack through an expansion fixing bolt, and a grouting space is reserved between the thick iron plate and the permanent magnet; the permanent magnet is wrapped and adsorbed on the thick iron plate through a stainless steel wrapping plate; the grouting pump, the grouting pipe and the expansion fixing bolt are used for fixing the thick iron plate and conveying grout; a handheld drilling and grouting integrated grouting machine comprises a drilling and grouting integrated grouting head, a grout circulation cavity and a circular column permanent magnet, and the grouting head is embedded into a threaded blade and can push the circular column permanent magnet into the deep part of a crack through a boosting rod. When the slope slides, the magnetic base and the iron ore waste residues can quickly respond to form a wall, and the wall becomes a protective barrier.

The invention relates to the technical field of pipe gallery crack repairing, in particular to an underground pipe gallery deformation joint leakage repairing method. An underground pipe gallery deformation joint leakage repairing method comprises the following steps that original filler in a deformation joint is removed, and the deformation joint is filled with a backing slurry blocking material; mixing the high-ductility self-repairing waterproof mortar with water to prepare high-ductility self-repairing waterproof slurry, and filling the deformation joint with the high-ductility self-repairing waterproof slurry; the high-ductility polymer joint sealing mortar and water are mixed to prepare high-ductility polymer joint sealing slurry, the high-ductility polymer joint sealing slurry is smeared to the inner surface of the deformation joint, and a cavity is formed; a silane modified polyether material is poured into the cavity; and a W-shaped stainless steel plate is installed, polymer waterproof paint is brushed on the periphery of the deformation joint, and a waterproof sealing layer is formed. The three-in-one composite waterproof structure is adopted, the high-ductility self-repairing waterproof mortar, the W-shaped stainless steel plate and the silane modified polyether rubber are combined to construct an inner-blocking, middle-preventing and outer-sealing composite waterproof system, and the waterproof performance of the deformation joint in the dynamic deformation environment is remarkably improved.

This invention relates to a structure and construction method for reinforcing altered rock masses in dam foundations. The purpose of this invention is to provide a simple, stable, adaptable, and convenient structure and construction method for reinforcing altered rock masses in dam foundations. The technical solution of this invention is: a structure for reinforcing altered rock masses in dam foundations, used to reinforce dam foundations with fault zones and geological defects in the altered rock masses. Its characteristic is that it has grooves excavated on the foundation surface of the dam foundation corresponding to the underlying fault zones and altered rock masses. Concrete is backfilled into the grooves to form concrete plugs, and the area of ​​the backfilled concrete is reinforced with cement grouting. This invention is applicable to civil engineering projects such as water conservancy and hydropower.

The invention relates to the technical field of settlement post-cast strips, in particular to a pre-closed advanced water stop grouting device and method.The pre-closed advanced water stop grouting device comprises a basement top plate, a bottom plate, a cover plate and a grouting sleeve and further comprises a self-adaptive adjusting assembly; the self-adaptive adjusting assembly comprises an inner cylinder, an outer cylinder, a spring, a sealing ring and a pre-tightening force adjusting component, and when the building body settles, the cover plate descends to drive the outer cylinder to descend, and then the spring is extruded; the springs on the two sides generate reverse buffering force after being compressed, the force is transmitted to the cover plate through the outer cylinder, the internal stress of the cover plate caused by differential settlement is effectively counteracted, and it is avoided that a sealing structure at the joint of the cover plate and a basement top plate cracks due to rigid pulling; and after the settlement is stable, pressure grouting is performed through the grouting sleeve, so that the problems of cracking of the cover plate and failure of sealing structures such as a sealant and a waterproof coiled material due to rigid pulling are solved.

The utility model relates to the field of rock mass restoration, in particular to a rock mass restoration and reinforcement device for broken rock mass of stone cultural relics, and provides the following scheme aiming at the problem that the rock mass restoration and reinforcement device in the prior art has excessive intervention on a rock mass structure: the rock mass restoration and reinforcement device comprises a vertical supporting mechanism, the first jacks are fixed to the top face of the mounting plate, the supporting columns are detachably mounted on the bottom face of the mounting plate, and a mounting groove is formed in one end of the mounting plate; the side edge supporting mechanism comprises a movable plate movably arranged in the mounting groove, a fixed plate fixed to the top face of the movable plate, a second jack hinged to the outer wall of the side, close to the mounting plate, of the fixed plate, and a telescopic rod mounted at the output end of the second jack. The bottom and the side edges of a damaged rock mass can be conveniently supported, interference and damage to the rock mass are reduced, the whole device can be conveniently stored and transferred, and great convenience is brought to outdoor use of a user.

The invention provides an underground space communication reserved hole wall body later-stage hole communication construction method, an existing prefabricated wall body comprises a main body structure area and a reinforcing structure area, and a water stop opening method is arranged on the butt joint face of the existing prefabricated wall body, and the method comprises the steps that firstly, an automatic lock catch water stop system is installed in the reinforcing structure area of the existing prefabricated wall body, and an automatic lock catch water stop system is installed in the reinforcing structure area of the existing prefabricated wall body; a spherical rubber water stop belt is placed in the water stop opening; secondly, a to-be-built basement soil body is excavated, and to-be-built basement floors are sequentially constructed from bottom to top; 3, taking out the wall body of the hole, and arranging a vertical support at the same time; constructing a first reinforcing column on the left side of the hole; the reserved hole wall body and the existing prefabricated wall body are in butt joint and locked; sequentially taking out each wall body unit, additionally arranging a vertical support, and arranging a second reinforcing column; and fourthly, the reinforcing structure area is constructed, the existing basement floor, the existing prefabricated wall and the basement floor to be built are connected, and the lintels, the first reinforcing columns and the second reinforcing columns form a complete communicating hole.

The application discloses a grouting reinforcing device for bridge foundation piles and belongs to the technical field of reinforcing equipment. The device mainly aims at the problem that the existing products need to be cooperated by multiple people and their structures are easy to be damaged and maintained during actual operation, and provides the following technical scheme. The device comprises a bottom plate for bottom laying and a side protection mechanism for foundation pile reinforcement. The bottom plate and the side protection mechanism are assisted and supported by a supporting mechanism. The side protection mechanism is composed of a side plate, an extension plate and a limiting assembly. The device can be operated by one person instead of multiple people during height applicability adjustment, reduces operation difficulty and labor cost. The setting of the locking assembly not only guarantees the convenience of operation during angle adjustment, but also can share the supporting force after angle adjustment, guarantees the service life of the product, reduces the maintenance cost, and further improves the practicality of the product.

The utility model relates to the technical field of buildings, and discloses a steel structure building foundation reinforcing device which comprises a reinforcing mechanism, and a supporting mechanism is arranged on the outer side of the reinforcing mechanism. The reinforcing mechanism comprises a bottom plate, supporting plates are fixedly connected to the front side and the rear side of the top of the bottom plate correspondingly, first through holes are formed in the middles of the two supporting plates correspondingly, first fixing bolts are arranged in the first through holes, supporting blocks are rotationally connected to the surfaces of the first fixing bolts, and connecting plates are arranged at the tops of the supporting blocks. Fixing plates are fixedly connected to the front side and the rear side of the bottom of the connecting plate correspondingly, second through holes are formed in the middles of the two fixing plates correspondingly, and second fixing bolts are arranged in the second through holes. According to the steel structure building foundation reinforcing device, the rapid, simple, convenient and stable mounting and dismounting process is achieved, and meanwhile high flexibility and wide applicability are achieved.

The application discloses a kind of pile foundation buckling prevention methods for reinforcing local depth liquefied soil between piles, the method comprises the following steps: step one, reinforcement scheme theoretical calculation;Step two, site construction.The application uses buckling-restrained brace to connect foundation pile to form a reinforcing body, which constrains lateral deformation of foundation pile, improves overall lateral stiffness and reduces differential settlement of foundation pile;Combined jack is used to transmit force to segmented pressure rod, and buckling-restrained brace is segmented and gradually driven into fixed depth, with lower resistance from soil body and accurate positioning.The application does not require large construction equipment, solves the problem of narrow space and unsuitable construction for existing buildings, and does not produce waste residue, waste, noise pollution and other environmental pollution, and is environmentally friendly construction.The void left by buckling-restrained brace construction is backfilled with gravel and injected with reinforcement slurry, which can improve the bearing capacity of foundation soil and speed up the drainage speed of liquefied soil layer, finally achieving simultaneous reinforcement of pile foundation and foundation soil, achieving two goals at once.

The utility model provides a repairing system for corrosion of a photovoltaic concrete pile head, and relates to the field of photovoltaic concrete piles, the repairing system comprises a self-compacting concrete layer, a concrete anti-corrosion coating and a plurality of blocking ring pieces prefabricated and formed by UHPC materials; the segmented ring sheets and the assembled cylindrical structure integrate the advantages and characteristics of UHPC materials, and have high strength, high toughness, high impermeability, freeze-thaw resistance, chemical erosion resistance and impact resistance; a plurality of block ring pieces prefabricated and formed by UHPC materials are spliced on the outer side of a concrete pile head to be repaired on site to form a cylindrical structure, preferably, the block ring pieces are made into semicircular ring pieces, and two pieces can be spliced into the cylindrical structure, so that the construction difficulty is effectively reduced, the splicing is rapid, and the operation is simple; self-compacting concrete slurry is poured into a filling cavity gap between the cylindrical structure and the to-be-repaired concrete pile head, the slurry is a finished product prefabricated material, and the quality of cast-in-place self-compacting concrete is ensured through field construction; in addition, the concrete anticorrosive coating is coated outside the cylindrical structure made of the UHPC material, so that the durability of the structure is further enhanced.