6053results about "Foundation engineering" patented technology

The invention discloses a cavity type mixed tower fan foundation formwork construction method. Comprising the steps of cushion layer pouring, pay-off, cavity foundation slab steel bar binding, annular support system erecting, foundation lower inner formwork supporting and inner support frame body arranging, cantilever anchoring end bottom formwork frame body supporting, cantilever anchoring end bottom formwork installing, foundation upper inner formwork supporting and inner support arranging, anchor backing plate and prestressed pipe installing, steel bar binding and annular support system erecting. And a foundation outer formwork is installed. Compared with the prior art, formwork erecting is formed at a time, a foundation is integrally poured, and the overall construction quality is guaranteed; the problem of leakage caused by two-time pouring of a construction joint part is avoided, water stop steel plates are reduced, and materials are saved; the inner supporting frame bodies are radially arranged with the center of the circle and the center of the stand column as a supporting point, and structural stress is reasonable. The supporting frame body is simple in structure, neat, attractive, reasonable in stress and easy to operate, the center stand column is recycled, and construction is efficient.

The invention provides a mine water prevention and control risk early warning method and system based on earthquake and geology fusion, and belongs to the field of soil layer or rock drilling, the method comprises the steps that real-time earthquake data of an earthquake monitoring module and geological exploration data of a geological exploration module are received, and the geological exploration module comprises a drilling detection module and a hydrogeological analysis module; based on the real-time seismic data, the geological exploration data and a preset water prevention and control risk early warning model, obtaining a risk level including a risk level and a corresponding water prevention and control execution measure; triggering target execution equipment such as drilling equipment to perform prevention and treatment according to execution measures; drilling a monitoring hole and arranging an optical fiber osmometer to collect osmotic pressure data at a first risk grade; at the second risk level, grouting plugging is conducted on the crack drilling grouting holes; constructing a water guide hole in the aquifer at the third risk level, and guiding underground water to a safe area through a drainage pump group. According to the method, multi-source data are fused to realize graded accurate early warning and prevention.

The invention provides a concrete regulation and control system and method integrating heat recovery, spraying and gradient control, and relates to the technical field of concrete curing, and the concrete regulation and control system comprises a temperature sensing element and a humidity sensing element which are mounted on reinforcing steel bars in a concrete structure in a layered manner in the depth direction; the cooling water circulating system comprises a water pump and a cooling water pipe, and the cooling water pipe is arranged in the mass concrete structure and externally connected with a variable frequency circulating pump; the double-water-tank system is matched with the heater to realize graded regulation of water temperature; the automatic spraying system is connected with the integrated electric heating module; the heat recovery and circulation assembly is connected with an outlet of a cooling water pipe in the concrete, recovers concrete hydration heat brought out by the cooling water pipe, and transfers heat of high-temperature cooling water with the temperature being 50 DEG C or above to the phase change heat storage tank; the central control unit continuously receives and records monitoring data of the temperature sensor and the humidity sensor and analyzes the monitoring data in real time, and when the temperature gradient or the humidity gradient exceeds the limit, a gradient field control instruction is automatically triggered to achieve energy efficiency maximization.

The present application belongs to the technical field of mass concrete construction, and aims to solve the problem of high thermal resistance and slow heat dissipation of traditional cooling pipe laminar bottom layer, and discloses a gravity dam construction cooling water pipe based on destruction of laminar bottom layer and a method thereof. The cooling water pipe comprises a plurality of series water pipe units, each water pipe unit comprises a steel pipe, a flexible spring hose is arranged in the steel pipe, and the spring hose forms a spiral protruding turbulence structure along the inner wall of the steel pipe; the hose is fixed by pointwise anchoring and outer wall surface bonding with glue, and a ring is arranged at both ends for limiting and assisting turbulence. The present application breaks through the thermal resistance of laminar bottom layer, greatly improves the hydration heat conduction efficiency, is convenient to construct and has durable structure, and is suitable for mass concrete temperature control requirements.

The invention belongs to the technical field of gate shaft construction, and particularly relates to a one-time forming pouring system and a one-time forming pouring method. The gate groove formwork and the vertical shaft sliding formwork assembly in the one-time forming pouring system can move in the depth direction of the gate shaft and jointly define a pouring ring, and when the strength of hydraulic concrete structures corresponding to the vertical shaft sliding formwork assembly and the gate groove formwork reaches the demolding strength, the gate groove formwork and the vertical shaft sliding formwork assembly are separated. The positions of the vertical shaft sliding formwork assembly and the gate groove formwork can be adjusted through the lifting device and the hoisting device, so that the pouring space rises in the depth direction of the gate shaft, continuous pouring of the hydraulic concrete structure is met, pouring of the hydraulic concrete structure does not need to be conducted step by step, joints are avoided, and the construction efficiency is improved. The integrity and shear strength of the hydraulic concrete structure are improved, so that the construction quality of the hydraulic concrete structure in the gate shaft is ensured, and meanwhile, the construction difficulty is reduced.

The present invention relates to the technical field of ship lock concrete construction, and in particular to a material placing system and construction method for concrete pouring on a high surface of a ship lock. According to the present invention, a feeding belt conveyor is arranged in a line direction of the ship lock and used for conveying concrete materials from a bottom end to a high end, and then by means of a bidirectional telescopic material placing machine which is transversely arranged, the concrete materials are transversely conveyed to the side wall of the ship lock for concrete pouring; the pouring height is adjustable; the transverse extension and retraction length is adjustable, and the bidirectional telescopic material placing machine can extend and retract along the left side and the right side in the transverse direction; and the pouring range is large, and the construction efficiency is high.

The invention provides a grouting geology grading and construction parameter setting method based on rock mass permeability, and relates to the technical field of foundation engineering grouting construction.The method comprises the steps that the water permeability rate, fracture parameters (the number of independent unfilled fractures, the opening degree and the filling condition), ground stress and grout rheology data of a target hole section are obtained; calculating a grouted stratum grouting index (SGI) through the water permeability rate, the fracture number, the maximum equivalent fracture opening degree and the correction coefficient; the rock splitting strength is estimated in combination with the drilling condition; whether grouting is conducted or not is judged based on the SGI value, and the grouting starting water cement ratio, the grout changing strategy, the initial pressure and the pressure increasing strategy are dynamically adjusted; the grouting pressure is designed according to the stratum splitting strength, and the grouting termination condition is set in combination with the real-time flow-pressure data. Grouting parameters are optimized through quantitative grading and real-time data, experience dependence is reduced, the construction precision and efficiency are improved, the stratum adaptability is enhanced, and the engineering quality and the material utilization rate are ensured.

The invention discloses a dam underwater seepage point detecting and plugging integrated system and method, and relates to the field of dam safety maintenance. The dam underwater seepage point detection and plugging integrated system comprises a suspension frame and further comprises a sleeve fixedly connected to the suspension frame; the piston disc is connected in the sleeve in a sliding manner; one end of the spring is fixedly connected with the inner wall of the sleeve, and the other end of the spring is fixedly connected with the piston disc; through the synergistic effect of the sealing air bag, the spring piston disc and the conducting ring warning indicator, efficient and reliable plugging is achieved, the sealing air bag expands to fill gaps, water seepage is isolated, equipment is fixed, and the impact resistance is enhanced through the L-shaped design; the spring is matched with the piston disc, so that the gap is uniformly filled with polyurethane, the piston disc moves to supply air to the air bag, and the whole-course sealing stability is ensured; the conducting ring and the warning indicator feed back the plugging state in real time, diving operation of personnel is avoided, and efficiency and safety are improved.

The invention belongs to the technical field of ocean engineering materials, and particularly relates to an underwater concrete self-repairing material containing dynamic disulfide bonds as well as a preparation method and application of the underwater concrete self-repairing material. The underwater concrete self-repairing material containing the dynamic disulfide bond comprises the following components in parts by weight: 50-70 parts of a hardening agent which is an epoxy prepolymer containing the dynamic disulfide bond; the water repellent agent comprises 20-35 parts of a curing agent and 1-3 parts of an accelerant. According to the underwater concrete self-repairing material containing the dynamic disulfide bonds, the epoxy prepolymer containing the dynamic disulfide bonds serves as a main network, the epoxy prepolymer is broken under the action of external force, and then new covalent bonds can be formed through spontaneous recombination to repair microcracks.

The invention provides marine concrete with salt corrosion resistance and self-repairing and a preparation method thereof.The marine concrete is prepared from, by weight, 190-210 parts of cement, 91-100 parts of a natural mineral activating group, 10-15 parts of a composite corrosion inhibitor, 30-35 parts of an exciting agent, 3-6 parts of a high-efficiency water reducing agent, 4-8 parts of a polyamide / polyether sulfone copolymer and 20-25 parts of microcapsules; the preparation method comprises the following steps: preparing the composite corrosion inhibitor and the microcapsule; mixing the cement, the natural mineral activating group, the composite corrosion inhibitor, the exciting agent and the high-efficiency water reducing agent, adding the treated polypropylene fibers and the microcapsules, reacting and curing. According to the invention, the long-acting protection and self-repairing functions of the marine concrete in a high-salt environment are realized by utilizing the cooperation of multiple physical and chemical mechanisms of various formula materials.

The present invention relates to the field of engineering technology, and particularly to an intelligent concrete curing system based on temperature and humidity regulation, comprising: a collection unit that collects the film-covered images of the surface of the concrete after pouring at several time points, and collects the temperature data at several positions inside the concrete and the ambient temperature data; an analysis unit that determines the dry area and the wet area according to the film-covered images, and determines the change rate of the dry-wet ratio, determines the change rate of the temperature difference according to the temperature data at several positions and the ambient temperature data, and determines the water evaporation rate in the concrete according to the change rate of the dry-wet ratio and the change rate of the temperature difference; a control unit that adjusts the curing temperature according to the water evaporation rate and a preset first evaporation rate, and adjusts the water spraying amount / adjusts the spraying frequency according to the water evaporation rate and a preset second evaporation rate; and an execution unit that cures the concrete according to the adjusted curing parameters. The present invention intelligently controls the concrete curing parameters and improves the concrete curing effect.

The invention belongs to the technical field of underwater operation, and relates to a maintenance device for a lower hinged support of a dock gate and a construction method thereof. The device comprises a waterproof cover box, a diving barge, a hoisting system and a drainage assembly, the waterproof cover box comprises a cover body and a channel well, openings are formed in the bottom and the top of the cover body, the bottom face of the cover body is in sealed compression joint with the surrounding structure of the lower hinged support to be maintained, the channel well is connected to the opening in the top of the cover body in a sealed mode, and the top face of the channel well is higher than the water surface. The diving barge is provided with a plurality of hydraulic supporting legs capable of ascending and descending so that the diving barge can be supported in the horizontal door pit. The hoisting system comprises a tower frame and an arm frame which are arranged on the diving barge, and one end of the arm frame is located above the cover body and connected with the cover body in a pressing mode; the drainage assembly comprises a submersible pump and a drainage pipe, the submersible pump is arranged in the cover body, one end of the drainage pipe is connected with the submersible pump, and the other end is led to the water surface through the channel well. According to the method, a stable dry operation environment can be rapidly constructed at the dock gate lower hinged support to be maintained, rapid maintenance is achieved, pollution to a sea area is avoided, and operation safety is improved.

The invention relates to the technical field of river bank protection, in particular to a river bank slope protection for cofferdam construction and a construction method thereof. S2, construction of a near-water area structure; s3, construction of a far water area structure; s4, ecological enhancement; triple optimization of river bank protection is achieved through dynamic water level monitoring and modular design, a double-layer reinforced concrete and elastic sealant structure is adopted in a near-water area, the compressive strength is improved by 20%, the crack width is smaller than or equal to 0.2 mm, and material waste is reduced by 15% in cooperation with dynamic width adjustment (+ / -2 m); the mold bag concrete slope protection is combined with an atomization spraying system, the anti-scouring capacity reaches 5 m / (m.s), the vegetation coverage rate is larger than or equal to 80% within 3 months, and the water and soil loss rate is reduced by 70%; the modular honeycomb structure inflation assembly efficiency is improved by 40%, the transportation cost is reduced by 50%, the distributed sensors achieve structure displacement / pressure three-level early warning, the operation and maintenance cost is reduced by 70%, the overall service life is prolonged by more than 5 years, and an ecological-engineering collaborative protection system is formed.

The invention relates to an underwater stirrer and an underwater glue injection system. The underwater stirrer comprises a driving motor, a stirring barrel, a transmission shaft, blades and a bearing seat, the stirring barrel comprises a barrel body and a cover body used for sealing the barrel body, an avoiding hole is formed in the cover body, one end of the transmission shaft is connected with an output shaft of the driving motor, the other end of the transmission shaft penetrates through the avoiding hole and extends into the barrel body, and a mechanical seal is arranged between the transmission shaft and the cover body. The paddle is connected with the transmission shaft and is positioned in the stirring barrel, the bearing seat is sleeved outside the transmission shaft, one end of the bearing seat is hermetically connected with the cover body, a first sealing element is arranged between the bearing seat and the cover body, the other end of the bearing seat is hermetically connected with the driving motor, and a second sealing element is arranged between the bearing seat and the driving motor. The underwater stirrer is more suitable for underwater construction environments.

The utility model discloses a template embedded type dam face permanent heat preservation protection module. Comprising a heat preservation core layer, a facing anti-seepage protection layer is arranged on the side, close to a concrete pouring formwork, of the heat preservation core layer, an internal pressure-bearing protection layer is arranged on the side, close to dam surface layer crack limiting steel bars, of the heat preservation core layer, and a thermal broken bridge supporting keel is arranged in the heat preservation core layer; an anchoring device is arranged in the area between the internal pressure-bearing protection layer and the dam surface layer crack limiting steel bars. The modular prefabrication and construction method is adopted, the prefabrication and installation method of a single module is simple and efficient, details such as anchoring protection measures are fully considered, the engineering construction operability is high, convenience and high efficiency are achieved, and the construction time of the heat preservation layer is greatly saved.

The utility model relates to a steel cofferdam structure for deepwater foundation auxiliary construction. The method is suitable for the technical field of cofferdams. According to the technical scheme, the cofferdam comprises a plurality of corner connecting units and cofferdam wall bodies arranged between every two adjacent corner connecting units. The cofferdam wall body comprises at least one cofferdam unit, and the cofferdam unit is formed by splicing a plurality of hollow steel plates; a first limiting column is arranged on the right side face of the hollow steel plate, a first limiting clamping groove capable of being matched with the first limiting column is formed in the left side face of the hollow steel plate, and a sealing air bag matched with a gap between the first limiting clamping groove and the first limiting column is arranged in the first limiting clamping groove. The top of the hollow steel plate is provided with a top sealing structure, and the bottom of the hollow steel plate is provided with a bottom sealing structure matched with the top sealing structure to achieve sealing. At least one connecting seat is fixed on the inner side surface of the hollow steel plate; a supporting and fixing mechanism is arranged in the steel cofferdam structure and fixedly connected with the connecting bases of the hollow steel plates on the steel cofferdam structure.

The utility model discloses an anti-blocking type side slope grouting drill bit, which belongs to the technical field of side slope protection and comprises a grouting pipe and a grouting drilling tool, the grouting drilling tool is mounted at the bottom end of the grouting pipe in a threaded manner, and inner cavities of the grouting drilling tool and the grouting pipe are provided with grouting channels; the grouting drilling tool is composed of a drilling pipe and a drill bit, the top end of the drilling pipe is in threaded connection with the grouting pipe, and the bottom end of the drilling pipe is in threaded connection with the drill bit. A sealing structure is fixedly installed in an inner cavity of the drill pipe, an adjusting structure is slidably installed at the bottom end of the drill bit, a driving disc is driven through an electric rod in the sealing structure, a sealing block is driven by a transmission folding frame to unfold or contract along a moving groove, self-adaptive adjustment is achieved in cooperation with a piston pipe and an air injection pipe, and the sealing structure can be tightly attached to the inner walls of grouting holes with different diameters; effective plugging is formed, the risk that grout flows back to the outside of the drill hole along the drill hole due to untight sealing is effectively reduced, the reinforcing effect of grouting is enhanced, a slope rock-soil body is fully reinforced, and the stable grouting pressure and the reinforcing effect are guaranteed to a certain extent.

The invention discloses a high-bearing-capacity offshore wind power pile foundation structure and a construction method thereof. The high-bearing-capacity offshore wind power pile foundation structure comprises a suction bucket, a vertical rod installed in an inner cavity of the suction bucket and coaxially fixed to the suction bucket, a stabilizing assembly dividing the inner space of the suction bucket into a plurality of independent cavities and a leveling assembly. By arranging the stabilizing assembly and the leveling assembly, the suction bucket is divided into a plurality of independent cavities through the stabilizing assembly, differential pressure leveling is conducted in a multi-cavity independent water pumping mode in the stage of preliminary contact with the seabed, the perpendicularity of the suction bucket in contact with the seabed is guaranteed, and in the stage of downward insertion of the bucket body part, a high-pressure nozzle is started again to conduct secondary posture fine adjustment; according to the dynamic deviation correcting device, the dynamic deviation correcting capacity is achieved in different time periods in the penetration process, the dynamic deviation correcting device can adapt to uneven local hardness of a seabed or slight drifting of the posture of a barrel body in the downward insertion process, inclined insertion and penetration failure caused by posture unbalance of the suction barrel are avoided, and the vertical bearing performance and the anti-overturning stability of a pile foundation are further enhanced.

The utility model discloses a multi-wing-plate shared mooring anchor foundation suitable for a wave energy device, and relates to the technical field of ocean engineering, the multi-wing-plate shared mooring anchor foundation comprises an anchor cover located on the upper portion, a sleeve in the middle and a shared anchor foundation on the lower portion, the anchor cover comprises a circular plate, a connecting rod arranged on the top face of the circular plate and a cylinder arranged on the bottom face of the circular plate, and the cylinder is sleeved with the sleeve. The sleeve is connected with the anchor cover through a chain, the shared anchor foundation is a barrel with two open ends, a wing plate is arranged on the outer wall of the barrel in the axial direction, an inserting groove matched with the wing plate is formed in the lower portion of the sleeve, the sleeve is sleeved with the barrel, and a plurality of anchor eye connecting anchor chains are arranged on the outer wall of the barrel to form an array group shared anchoring system. After the shared mooring anchor foundation penetrates into a seabed by a certain depth, the anchor cover and the sleeve are lifted and removed, the shared anchor foundation is embedded in the seabed, the anchor cover and the shared anchor foundation are both installed in the sleeve, vertical penetration and lifting can be better achieved, the anchor cover and the sleeve are connected through the chain, internal suction force can be released during lifting, and the anchor cover and the sleeve are connected through the chain. And the dismounting difficulty is effectively reduced.

The invention relates to the technical field of water conservancy project cofferdam construction, and discloses a cofferdam backfill supporting device which comprises a filler pipeline, a guide part is arranged on the filler pipeline, a positioning groove is formed in the outer wall of the filler pipeline, a supporting part is arranged on the filler pipeline, and the supporting part comprises a first supporting ring and a second supporting ring. The first supporting ring is slidably connected with the outer wall of the filling pipeline, a support is fixedly connected between the first supporting ring and the second supporting ring, a positioning part is arranged on the support and comprises a rod sleeve, and the rod sleeve is fixedly connected to the support. The guiding part and the supporting part are matched to avoid inclination and deviation of the pipeline, the positioning part and the calibration part are matched to improve the hole site calibration precision, the limiting part achieves conflict-free switching between the calibration part and backfill material injection, finally it is guaranteed that backfill materials are evenly filled, the problems of scattering and cavities do not exist, and the requirements for cofferdam impermeability and structural stability are met.

The invention discloses a pumping concrete pouring supporting facility for an ultra-deep diaphragm wall and a technological method.The pumping concrete pouring supporting facility comprises a concrete pump truck, a pouring pipe fitting, a flow-limiting pouring guide pipe and a slurry pipe, the concrete pump truck is located on the side edge of a slotted hole, and a discharging port of the concrete pump truck is connected with the top end of the pouring pipe fitting; the bottom ends of the pouring pipe fitting and the slurry pipe extend into the slotted hole, the bottom of the slurry pipe is higher than the upper surface of the concrete, and the slurry pipe is connected with a slurry return assembly. The device has the beneficial effects that the structure is simple, the design is reasonable, the process method is simple, and the adverse effects of coarse and fine aggregate separation, mixture segregation and the like of concrete can be reduced by reducing the falling speed during concrete pouring by matching pumped concrete with the flow-limiting pouring guide pipe; accumulation of flocculate is reduced through active slurry returning, so that slurry mixing of concrete, slurry and flocculate is reduced, and the quality of the formed diaphragm wall is improved.

The invention discloses an intelligent self-adaptive pouring system and a pouring process, which are used for self-adaptive pouring of an anti-seepage wall and are characterized by comprising a concrete pressure conveying system, a liquid level monitoring and slurry recycling system and an intelligent pipe drawing system. According to the invention, a pressurization supply system based on a concrete delivery pump or a sealed pressurization tank is adopted, so that compared with a method of pouring depending on the dead weight of concrete in the prior art, the technical effect of applying continuous and stable extra pressure to the concrete in the pouring pipe is achieved; the pressure can effectively overcome larger resistance of concrete flowing in a guide pipe and a groove hole, so that the bottom opening of a pouring pipe is allowed to maintain a larger safety burial depth range in the concrete, the strict requirements for pipe drawing time and pipe drawing height control are remarkably reduced, the fault-tolerant capability of the system is higher, and the service life of the system is prolonged. And the risk of pipe casting caused by instantaneous overlarge burial depth is fundamentally avoided.

The invention relates to the technical field of wind power, and discloses a lattice type foundation for a wind power tower and a construction method thereof.The foundation comprises a plurality of bearing platforms, and a cross beam is fixedly connected between every two adjacent bearing platforms; a lattice type wind power tower column can be erected on the upper side of the bearing platform; an embedded pipe is reserved in the center of any bearing platform and used for penetration of a prestressed steel strand, and the prestressed steel strand can be fixed to the top face of the tensioning cavity; a tensioning cavity is formed in the bottom surface of any bearing platform and can be used as a prestressed steel strand tensioning or anchoring operation space; any bearing platform is provided with a pre-stressed anchor bolt assembly, and the pre-stressed anchor bolt assembly is suitable for being fixed to a lattice type wind power tower column. The multiple bearing platforms are adopted for providing support for fixing of the lattice type wind power tower, compared with a fan foundation of a traditional cylinder type tower, the land acquisition area can be remarkably saved, the material cost is reduced, and the wind power tower foundation is suitable for various terrain environments.

The utility model discloses a bridge ship collision prevention active protection device which comprises a laser range finder, a control assembly, a main bridge pier, a main bridge bearing platform, a separation type ship collision prevention facility structure, a polyurethane foam rotary drum and a riverbed, the laser range finder and the control assembly are arranged on the upper portion of the main bridge pier, and the main bridge bearing platform is arranged at the bottom of the main bridge pier. A plurality of separated ship collision prevention facility structures are arranged on the periphery of the main bridge bearing platform on the main bridge piers, polyurethane foam rotating cylinders are arranged on the separated ship collision prevention facility structures, and the other ends, away from the polyurethane foam rotating cylinders, of the separated ship collision prevention facility structures are used for being buried in a riverbed to be fixed. When the distance between the ship and the main bridge pier is detected to be smaller than a certain range through the optical distance measuring instrument, the control assembly controls the gas generator to inflate the gas bag to generate buoyancy, the polyurethane foam rotating drum is pulled to the water surface through the buoyancy to make contact with the ship, and the situation that the ship collides with the main bridge pier and consequently the main bridge pier is damaged is prevented.

The invention discloses a foundation pit dewatering well arrangement optimization method which is characterized by comprising the following steps: step 1, setting assumed conditions of a foundation pit dewatering seepage analysis model; step 2, based on the assumed conditions, establishing a numerical model for the foundation pit precipitation seepage analysis model to obtain a foundation pit precipitation seepage analysis numerical model; 3, setting a target function; 4, the target function serves as a constraint condition, iteration is conducted on the foundation pit precipitation seepage analysis numerical model, and the optimal solution of iteration serves as a final precipitation well design optimization result which comprises the number and the position of precipitation wells and the depth corresponding to each precipitation well. According to the foundation pit dewatering well optimization method, the obtained foundation pit dewatering well optimization result can better meet the actual requirements for the number, position and depth of the dewatering wells, the dewatering well arrangement is better matched with the requirements, waste is avoided, and the economical, energy-saving and environment-friendly effects are achieved.

The invention belongs to the technical field of gravity dam construction, and provides an assembled concrete cooling pipe structure and method for gravity dam construction. The cooling pipe is composed of a plurality of pipe body units connected in series, and lining pieces are arranged in metal pipes of the pipe body units. The lining piece and the elastic steel sheets form a criss-cross cage type structure through the strip-shaped plates, the strip-shaped plates are provided with pitted surfaces and notches, the steel sheets can stretch out and draw back to achieve variable-diameter adjustment, and water flow can be forced to generate turbulent flow to damage the laminar flow bottom layer. The method comprises the steps of raw material pretreatment, notch and pitted surface machining, lining piece assembling, metal pipe assembling and fixing and pipe body unit series connection. The structure is stable, manufacturing is convenient, boundary layer thermal resistance can be reduced, heat transfer efficiency is improved, concrete temperature cracks are reduced, and the gravity dam construction requirement is met.

The invention belongs to the technical field of vibrating devices, and particularly relates to a vibrating device for large-volume concrete pouring construction of a fan foundation, the vibrating device comprises a vibrator, and one end of the vibrator is electrically connected with a vibrating rod through a connecting wire; a scraping mechanism is arranged on the surface of the vibrating rod, the scraping mechanism comprises a lantern ring fixedly connected to the surface of the vibrating rod in a sleeving mode, the interior of the lantern ring is hollow, an electric push rod is fixedly installed in the lantern ring, and a connecting rod is fixedly installed at the output end of the electric push rod; through reciprocating operation, concrete adhered to the surface of the vibrating rod can be quickly cleaned, so that the situation that the concrete on the surface of the vibrating rod is hardened and solidified, and subsequent cleaning is difficult is effectively avoided. And meanwhile, workers do not need to clean, so that the workload of the workers is reduced, and efficient cleaning operation can be achieved.

The invention discloses a grouting reinforcement anti-seepage method for a dam body of a coal mine underground reservoir, which comprises the following steps of: constructing a grouting hole at an artificial dam body position of a dam body to be treated, and performing segmented grouting on the grouting hole; the grouting materials are spread to the interiors of the artificial dam bodies, the interiors of the coal pillar dam bodies, the connecting positions between the artificial dam bodies and the coal pillar dam bodies, the connecting positions between the artificial dam bodies and the top plate rock stratum and the connecting positions between the artificial dam bodies and the bottom plate rock stratum; therefore, micropore cracks in the to-be-treated dam body and the connecting positions between the to-be-treated dam body and the top plate rock stratum and between the to-be-treated dam body and the bottom plate rock stratum can be effectively blocked, the leakproofness and the anti-seepage performance of the coal mine underground reservoir dam body are remarkably improved, and effective anti-seepage reinforcement of the coal mine underground reservoir dam body is achieved.