255results about How to "Low construction requirements" patented technology

The invention discloses a high temperature energy conservation corrosion resistant coating material, which comprises filling material, addition agent and adhesive by the weight ratio of 1-5:1:1-10. The invention also discloses the process for preparing the coating material, which comprises the steps of mixing filling material powder with addition agent proportionally, grinding to 600 mesh in a wet grinder, finally stirring and mixing with adhesive.

A waterproof coil laying machine is provided, which pertains to the laying equipment for waterproof coil for waterproof tech in roofs of buildings, and comprises a frame, a laying mechanism and a heater. The laying mechanism comprises a coil shaft 21, guide roll 25 and 28, a tension roll 32, and a pressing roll 33; the heater comprises a mixture gas distribution valve 1, a mixed air conveying pipe 6, and a burner 7. The mixture gas distribution valve 1 is in form of 3 pipe sets. The burner comprises a burner gas pipe 8, a row of flame nozzles 9 mounted on the gas pipe and flame covers 10. The invention realizes mechanization in laying of waterproof coil, is of high construction efficiency, lightens greatly labor intensity; the invention employs LPG, especially compressed air for supporting combustion, the fire is strong, the temperature is high, can enable the surface of the waterproof coil to melt rapidly; and in addition, as the inner course has a low temperature rise, the structure and waterproof property of the whole material will not be damaged, the construction quality is good; as using LPG, the cost is reduced comparing with using gasoline.

The invention discloses a self-heat-preservation mortar-free distributed steel block masonry shear wall system and a construction method of the self-heat-preservation mortar-free block masonry shear wall system. A self-heat-preservation mortar-free block masonry shear wall is made of self-heat-preservation mortar-free die clamping blocks (1), horizontal reinforcing bars (2), vertical reinforcing bars (3) and grout concrete. The self-heat-preservation mortar-free die card blocks (1) are connected through rabbets (4) and mortises (5) in a die card mode, and the vertical reinforcing bars (3) are arranged into vertical holes (6) formed by the self-heat-preservation mortar-free die card blocks, and the horizontal reinforcing bars (2) are arranged in horizontal holes (7) formed by the self-heat-preservation mortar-free die clamping blocks (1). The grout concrete is finally poured so as to form the self-heat-preservation mortar-free block masonry shear wall. The construction method of the self-heat-preservation mortar-free block masonry shear wall sequentially comprises the following steps of performing preparatory work, building blocks of the bottommost layer, building blocks of other layers, inserting the bars and pouring the concrete.

The present invention discloses a tail device and a tail dragging method. The tail device comprises: a tail end row which at least comprises a boom system, a travelling mechanism and a lifting mechanism, wherein the boom system is provided with a lifting mechanism and is supported on the travelling mechanism; and a tailstock which is used for being removably fixed to the lower part of a lifted device, and is provided with lifting holes. In the process of lifting the lifted device from the ground, the lifting mechanism is in hanging connection with the lifting holes, and the lifting holes are located at the end deviating from the ground. When the tail device is use for lifting a device, the center of gravity of the lifted device can be guaranteed to be always located below a connection line between the lifting point of main lifting equipment and the lifting point or the support point of the tail end row. The tail device has the advantages of good security, small weight borne by the tail end row, low lifting cost, etc.

The invention discloses a construction method for a complex geological section earth pressure balance shield passing a middle air shaft. The construction method for a middle air shaft enclosure structure at the shield passing position comprises the following steps of: pouring a continuous middle air shaft enclosure wall, arranging four concrete supports on the enclosure wall, and reinforcing deep stirring piles of structural bottom plates; and constructing a plain concrete continuous wall on the outer side of the end enclosure structure to block a tunnel portal. A backfilling method comprises the following steps of: backfilling plastic concrete in a range of 3 meters, close to the tunnel portal, and backfilling cement stabilizing soil at the middle position. The construction method also comprises the following steps of: casting the structural concrete bottom plates, casting a side wall of a negative second layer to the position of 50 centimeters below the third support, performing horizontal hole prospection on the tunnel portal part, detaching the third support, and casting a structural concrete side wall to the position of 50 centimeters below a middle plate. Collapse accidents of the tunnel portal and serious safety accidents when an electrical park brake (EPB) shield reaches and a shield machine is buried can be effectively avoided under complex geological conditions; and secondary departure of the shield machine in the middle air shaft and related risks caused by the secondary departure can be avoided.

The invention provides a robot navigation method and system. The method includes the steps of: controlling a camera arranged on a robot according to a navigation instruction to obtain identification points around the robot; inquiring a preset map according to the surrounding identification points to determine the current position of the robot, wherein the preset map includes each navigation track and identification points on each navigation track; inquiring the preset map according to the current position and a target position of the robot to obtain a navigation track matched with the current position and the target position; and determining a moving direction and a moving path of the robot according to the current position and the navigation track, thereby enabling the robot to move to the target position according to the moving direction and the moving path, realizing navigation, avoiding arrangement of access point equipment of relatively high cost and construction transformation of a place, saving cost, and lowering a construction requirement of the place to which the robot navigation method is applied.

The invention provides a waterborne rafting and setting component through slope moving the large bulk weight component from land to water by gas cell, which comprises the following steps: (1) building the slope; (2) setting floating-auxiliary gas cell on the component; (3) putting, fixing and rolling the gas cell on the slope; (4) moving the large bulk weight component from land to water through slope and floating; (5) floating the waterborne component; (6) setting the waterborne component.

The invention discloses an iron-based nanocrystalline composite coating for protecting a boiler tail heating surface and a laser-cladding forming process of the iron-based nanocrystalline composite coating. The iron-based nanocrystalline composite coating comprises the following components in percentage by weight: 49.9-62.8% of Fe, 14.2-20.4% of Cr, 9.0-16.3% of Mo, 2.9-4.1% of B, 0.6-1.3% of C, 1.0-2.4% of Mn, 3.4-8.0% of W, 1.0-1.9% of Si and 0-3.9% of RE, wherein RE is a rare earth element. The forming process comprises the following steps: preparing alloy powder of the iron-based nanocrystalline composite coating; treating the surface of the boiler tail heating surface; preparing the iron-based nanocrystalline composite coating through a simultaneous powder feeding method and a laser-cladding method, wherein the laser cladding is performed for multiple times. The formed iron-based nanocrystalline composite coating is 1 mm above in thickness. The iron-based nanocrystalline composite coating can obviously enhance the wear resistance and corrosion resistance of the boiler tail heating surface, and reduce maintenance costs of worn and corroded parts and consumption of raw materials of a power plant.

The invention discloses a method for repairing and treating a quality defect of a cast-in-place pile. The method is characterized by comprising the following steps that 1) the defect position of the pile is dynamically measured through low strain; 2) the top of the pile is drilled into for core taking, the depth of the core taking exceeds the defect position, and the exceeding depth is 1-2 times of the diameter of a pile body; 3) high-pressure hole flushing is carried out, and mud blocks, fine sand and other filler in the defect position are removed; 4) high-pressure hole cleaning is carried out, dregs in a core hole are returned out of a core hole opening, and no dreg sediment exists in the core hole until water is clear and the dregs are removed completely; 5) the hole is punched and filled with high-pressure cement slurry, and fine cracks and fissures of the defect position are filled with the cement slurry; 6) pipe insertion is carried out, and a grouting pipe and a slurry discharge pipe are inserted; 7) the hole is sealed; 8) high-pressure grouting is carried out, and the core hole is filled with the mixed cement slurry. Dynamic testing and retesting can both be restored and reach the standard through the low strain after the defected pile is repaired and treated. The method is simple and easy to implement, the working period for repairing and treating the quality defect of the cast-in-place pile is short, repairing construction cost is low, original project design is changed slightly, and the repaired pile is reliable in quality.

The invention provides a design method of a high-speed ring road cross section line shape by determining the actual width of a lane to calculate and deduce a high-speed ring road circular curve and across section line shape of a easement curve section of a road, solve an accurate cross-section of the high-speed ring road, and provide a basis for reasonable optimization of the cross-section, thereby effectively reducing subgrade filling height and earthwork filling and digging amount, and reducing the number of special-shaped plates on a cement concrete pavement. The design method of the high-speed ring road cross section line shape effectively solves a problem of changes in horizontal width of the easement curve section of the road and improves design rationality. The design method comprises the following steps: by introducing a Gaussian elimination method, calculating a cross-section parabola line shape; determining lane chord length on the cross section corresponding to horizontal width of the lane; and using the interval dichotomy to iterate repeatedly to make a target lane chord length approach a design value, and obtaining final lane horizontal width and filling height to determine the final line shape of the cross section.

The invention relates to a wireless DSP electronic policeman system for standard definition for running a red light, comprising a host system and at least one one-way shooting system, wherein the host system is connected with the one-way shooting system by a wireless link; preferably, the DSP module of the one-way shooting system is respectively connected with a first coil detection module, a signal receiving module, a data sending module and a first standard definition camera; the principle controller of the host system is respectively connected with a signal acquisition module, a signal sending module and the signal receiving module; the signal sending module and the data sending module are respectively connected with the signal receiving module and the data receiving module by the wireless link; preferably, the signal sending module and the data receiving module are ZIGBEE modules, and the data sending module and the data receiving module are wireless AP modules. The host system also comprises a second coil detection module connected with the principle controller line and at least one second standard definition camera. The invention has convenient installation and use, breaks through the limitation of application environment and lowers cost.

The invention relates to a net cage type biological filler sewage treatment device and a working method and application thereof, and belongs to the field of biological sewage treatment. The device comprises a net cage of a net structure. The net cage comprises a side wall, partition plates, a top cover and a net cage bottom. The net cage bottom is provided with a bottom plate, the top cover is movably connected with the side wall, the side wall is provided with at least one boss, the bottom plate is provided with at least one clamping part, the partition plates are arranged on the bosses or arranged in the clamping parts, and a filler zone is formed among the side wall, the bottom plate and the top cover and contains various kinds of filler. The filler zone can be divided into multiple upper and lower layers or multiple inner and outer zones through the partition plates as needed, different layers or different zones contain various kinds of filler, and the filler can be arranged in a stacked state or a suspended state or a stacked and suspended combination state and is high in combination freedom degree. According to the technical scheme, the problem of non-uniform distribution of filler in a sewage treatment tank is solved, and the device can contain various kinds of filler and can be conveniently installed without extra supports, flexibly stored at various sites and conveniently moved.

The embodiment of the invention discloses a radio frequency indication test system and a control method thereof and belongs to the technical field of communication. The system of the embodiment of the invention comprises a base station, wherein the base station generates a test control signal; and the test control signal and a tested signal are loaded into different frequency ranges of a radio frequency signal, and the loaded radio frequency signal is sent to a radio frequency indication tester, so that the radio frequency indication tester controls the test for the tested signal according tothe test control signal. In the embodiment of the invention, the radio frequency product such as the base station can control the radio frequency indication tester to test the radio frequency productwithout extra control equipment, so that the structure for the radio frequency indication test is simplified, and construction requirements of a production test environment and a field test environment of the radio frequency product such as the base station opening are reduced.

The invention discloses a coating anticorrosion method for connection parts of steel structures, which particularly comprises the following steps: (1) performing surface treatment to the connection part of a steel structure at a construction area to achieve a level of above St2 standard with no obvious bubbling or floating rust and no acute angle of surface protrusions; (2) uniformly smearing an anti-corrosion plaster on the surface of the connection part of the steel structure treated in step (1), wherein the amount of the anti-corrosion plaster is 10-1000 g / m2, and the smearing time is 1-10 times; (3) covering at least one layer of anti-corrosion strip outside the anti-corrosion plaster; (4) coating a protective cover at the surface of the anti-corrosion strip. The invention has excellent anticorrosion effect with an effective protection effect of above 20 years, has convenient construction and simple surface treatment, is operable with moisture and water, is applicable to structures with any shape, has good tightness and impact resistance, provides almost no additional load to structures, and has strong construction feasibility.

The invention relates to a low-alloy high-strength corrosion-resistant steel bar composed of Al, Ti, Cr and other elements and a preparation method of the low-alloy high-strength corrosion-resistant steel bar, and belongs to the technical field of steel preparation. The low-alloy high-strength corrosion-resistant steel bar comprises the following components in percentage by weight: 0.05-0.2% of C,0.1-1.0% of Si, 0.8-1.5% of Mn, 0.5-1.5% of Cr, 0.005-0.15% of Ti, 0.005-0.60% of Al, 0.005-0.05% of V, 0.01-0.03% of Nb, less than or equal to 0.045% of S, less than or equal to 0.045% of P and thebalance of iron and inevitable impurity elements. The preparation method comprises the following steps that smelting is carried out in a converter to obtain crude molten steel, the crude molten steelenters an LF (ladle furnace) to be refined to obtain refined molten steel, the refined molten steel is continuously cast into small square billets, the small square billets are heated and soaked in aheating furnace, and rolled into steel bars with target specifications on a bar rolling mill, and the structure of the obtained corrosion-resistant steel bar is ferrite and pearlite. Compared with other corrosion-resistant steel bars, the production process is simple, and the obtained corrosion-resistant steel bars are high in yield strength and tensile strength and good in corrosion resistance.

The invention relates to a zero-second dropping-off normal-temperature propellant adding and discharging connector for a carrier rocket and a method. The zero-second dropping-off normal-temperature propellant adding and discharging connector for the carrier rocket comprises a connector ground part, a connector on-rocket part, a first pulley set, a second pulley set, a third pulley set, a recoveryrope, a traction rope, a counterweight, an air cylinder and a ball lock; the connector on-rocket part is mounted on a propellant storage tank of the carrier rocket, the second pulley set and the air cylinder are mounted on a launching tower, the connector ground part is connected with the connector on-rocket part through the ball lock, the counterweight is connected with the connector ground partthrough the second pulley set and the recovery rope, and the air cylinder is connected with the ball lock through the third pulley set, the traction rope and the first pulley set. The connector between a ground normal-temperature propellant filling pipeline and the on-rocket propellant storage tank can drop off reliably after zero-second ignition for taking off of the carrier rocket.

The invention relates to a waterproof material for a cement concrete bridge floor and a preparation method of the waterproof material. The waterproof material is obtained by the following steps of: generating amino methyl acid ester by using isocyanate and compound polyalcohol, then adding ordinary heavy-traffic paving asphalt, and compounding and modifying by a tertiary amine catalyst, a compound antifoaming agent and ethyl acetate. The waterproof material can be firmly bonded with the cement concrete bridge floor, the resistance to high temperature and low temperature is good, the waterproof material can undergo comprehensive function requirements of temperature transforming and long-term loading, the destruction of the bridge structure caused by water seepage is alleviated, the service life of the road bridge is prolonged, the construction operation is safe and simple, the construction speed is high, the film forming time is short, the requirement on bridge floor construction is not high, and the construction can be carried out fast. The preparation method of the waterproof material is simple and easy to operate, the isocyanate, the compound polyalcohol and the ethyl acetate in a dehydrated state are not decomposed or oxidized in vacuum, so that the stability of each component is guaranteed and the prepared waterproof material has high solid content and good material performance.

The invention relates to a garbage compressor of vertical compression type, which comprises casing, rack, indenter vehicle, pushing blade, translation vehicle and hydraulic cylinder of pushing blade. The invention is characterized in the following steps: inner casing equipping compression warehouse, rack being equipped on bearing surface of foundation, casing equipping indenter vehicle guide rail to let vehicle move back and forth, indenter vehicle equipping indenter compressor cylinder and self-locking mechanism transferring compression force, translation vehicle that pushes indenter vehicle to move horizontally beingequipped between indenter vehicle and casing, rack equipping suitcase hydraulic cylinder to drive casing move on the vertical direction, one side of hydraulic cylinder of pushing blade in casing connecting with pushing blade and the other connecting with casing. The invention has the advantages of low height of apparatus, low cost and convenient installment and maintenance.

The invention provides a gravity settlement inclination vibration monitor and an application thereof. The gravity settlement inclination vibration monitor comprises a crossbeam, the crossbeam crossesdifferent zones of a building element, one end of the crossbeam positioned in one of the zones is hinged to the building element, a control case is fixedly connected with a lower part of the crossbeam, a biaxial inclination angle sensor and a stay rope displacement sensor are fixed in the control case, one end of the crossbeam positioned at the other zone is hinged to a swing arm, an upper end ofthe swing arm is hinged to the building element at the other zone, a fixed pulley is fixedly connected with an upper end of the swing arm, and a stay rope of the stay rope displacement sensor passes through the upper end of the crossbeam and is fixed at the other zone of the building element by passing across the fixed pulley. The gravity settlement inclination vibration monitor has simple structure, the combined action of the inclination angle sensor and the stay rope displacement sensor is used, structural environment is monitored, the structure has the characteristics of high reliability, wide coverage scope, low cost, and convenient installation and maintenance, and the gravity settlement inclination vibration monitor is especially adapted to environment monitoring in a cable tunnel.

The invention provides a gypsum-based ready-mixed mortar and a preparation method thereof. The ready-mixed mortar comprises 450-500 parts of hemihydrate gypsum, 550-600 parts of aggregate, 0.7-1.5 parts of compound modification additive, 0.2-1.0 part of foaming agent and 1-10 parts of setting retarder. The preparation method includes the following steps: mixing hemihydrate gypsum, aggregate, compound modification additive, foaming agent and retarder to obtain ready-mixed mortar. The gypsum-based ready-mixed mortar has strong adhesion to the substrate, which overcomes the shortcomings of easy cracking and hollowing in the use of traditional cement-based ready-mixed mortar; the one-time survival thickness is 4mm-2cm, which is smooth to the wall surface The requirements for the degree of strength are not high, and the construction requirements are greatly reduced; the hardening is fast, which can speed up the construction progress; the cost is low, and at the same time, it also has the advantages of good fire resistance, automatic temperature adjustment function, and light weight.

The invention discloses a plastic water channel, comprising a plurality of channel bodies, wherein the channel main bodies are connected in a manner of inserting end to end; the channel main bodies comprise channel bodies and channel sides which are arranged on the edges of the channel bodies; the channel sides include the first channel sides arranged at the ends of the channel bodies and the second channel sides arranged at two sides of the channel sides; both the first channel sides and the second channel sides are provided with bolt holes; the first channel sides are additionally provided with bearing ports, inserting ports, sealing grooves and sealing strips; strengthening ribs are additionally arranged at the bottoms of the channel bodies; the strengthening ribs include the first strengthening ribs which stretch in a transverse direction and the second strengthening ribs which stretch in a vertical direction; and the first strengthening ribs and the second strengthening ribs are distributed at the bottoms of the channel bodies in a staggered manner. According to the plastic water channel, the technical problems of high consumption, high cost, harm to environment, great construction intensity, low mounting efficiency, demand of maintenance and long working period of the prior art.

The invention discloses a calibration method, device and system and a storage device. The calibration method comprises the steps: respectively acquiring sensing signals detected by the depth sensor for the calibration carrier, and the images obtained through shooting of the calibration carrier by the image sensor, wherein the calibration carrier comprises a first area provided with a calibration object and a second area arranged to enable the induction intensity of the depth sensor to the second area to be larger than that of the first area; analyzing the sensing signals based on the inductionintensity conditions of different areas; determining a first spatial position of a first feature point in the second region, and determining a second spatial position of a second feature point in thecalibration object by using the image; and matching the first feature point with the second feature point according to a preset position relationship between the first feature point and the corresponding second feature point on the calibration carrier to obtain a plurality of sets of feature point pairs, and determining calibration parameters between the depth sensor and the image sensor based onspatial positions of the plurality of sets of feature point pairs. According to the scheme, the calibration accuracy can be improved.

The invention provides a basement construction dewatering and drainage device which mainly comprises a drainage pipe, a ventilation pipe, full-bore ball valves and a fixing pipe. The upper end of the drainage pipe and the upper end of the ventilation pipe are provided with the full-bore ball valves respectively. The drainage pipe and the ventilation pipe are installed on the fixing pipe. The fixing pipe comprises a steel pipe and a corrugated pipe. The fixing plate is provided with a sealing steel plate. The invention further provides a construction method of the dewatering and drainage device. The construction method comprises the steps that 1, a sump is arranged and filled with broken stone, and the corrugated pipe is buried in the sump; 2, the upper portion structure of the dewatering and drainage device is embedded into the upper end of the corrugated pipe; 3, a hose is installed, and the full-bore ball valves are opened for dewatering and drainage; 4, the full-bore ball valves are closed, and sedimentation post-cast strip pouring is carried out. The basement construction dewatering and drainage device has the beneficial effects that various problems produced when a basement bottom plate is affected by water pressure are effectively solved, construction requirements are met, the portion, at the position of the dewatering and drainage device, of the bottom plate can be poured together with a post-cast strip during closing, and the basement construction dewatering and drainage device is simple in structure, convenient to construct, economical, environmentally friendly, safe and reliable.

The invention provides a system using green land rainwater for compensating urban groundwater. A green land is a concave green land, the center of the concave green land is the lowest, the ground of the concave green land is in a steep and gentle combination shape, a rainwater collection unit and an infiltration compensating unit are arranged on the concave green land, the infiltration compensating unit comprises a grit layer A, a gravel layer, a thinnest medical stone layer, a thickest large gravel layer and a grit layer B sequentially from top to bottom, the thickness of the medical stone layer is 50-100cm, the thickness of the large gravel layer is 100-1000cm, the infiltration compensating unit is buried in the concave green land, a top infiltration port is positioned at the center of the concave green land, rainwater enters the infiltration compensating unit through the infiltration port, rest portions on the concave green land belong to the rainwater collection unit, and porous frameworks and broken stones are laid below the soil layer of the rainwater collection unit. The system overcomes the shortcomings of the prior art, is simple in construction and operation and has good water quality treatment effect.

The invention relates to a multifunctional culture water drainage strobe. A barrel-drain is arranged at a position outside a culture pond filled with the culture water and lower than the bottom of a drainage port of the culture pond; the drainage strobe comprises an outer sleeve arranged in the culture pond; the lower part of the outer sleeve is provided with a water through hole groove; the bottom of the culture pond inside the outer sleeve is provided with a drainage port; one end of a drainage concealed conduit arranged below the bottom of the culture pond is communicated with the culture pond through the drainage port; an inner insertion tube arranged in the outer sleeve can be inserted into or pulled out of the end of the drainage concealed conduit; a swing type water level control tube arranged in the barrel-drain can be inserted into or pulled out of the other end of the drainage concealed conduit; the water level control tube inserted into the drainage concealed conduit can swing around a connecting point between the water level control tube and the drainage concealed conduit; the top ends of the outer sleeve, the inner insertion tube and the water level control tube are all opening ends; and the top end of the inner insertion tube is lower than that of the outer sleeve. The strobe has the characteristics of automatic control of water level, good sealing performance, effective drainage of culture water at the bottom layer, timely drainage of redundant water in disaster weathers, simple and convenient construction and the like.

The invention discloses a generalized predictive control closed-loop insulin infusion system based on an adaptive reference curve strategy. The system comprises a blood glucose detection module, a controller, a program module and an insulin pump, the blood glucose detection module is used for acquiring the blood glucose of a user, and an output end of the blood glucose detection module is connected with an input end of the controller through signals. The insulin pump is used for infusing insulin into the user, and an input end of the insulin pump is connected with an output end of the controller through signals. The program module is executed by the controller, acquires the blood glucose of the user through the blood glucose detection module and adjusts the infusion rate of the insulin pump according to a CARIMA (controlled autoregressive integral moving average) model, a minimum variance control algorithm and the adaptive reference curve strategy. According to the generalized predictive control closed-loop insulin infusion system based on the adaptive reference curve strategy, adaptive reference curves can be generated according to blood glucose fluctuation of different patients,so that the infusion rate of the insulin pump can be flexibly controlled.

A method for protecting a steep slope roadbed through combination of slide-resistant piles and a gabion high retaining wall comprises the following steps that firstly, excavation abandoned ballast is subjected to regeneration to form all levels of material sources; secondly, the slide-resistant piles are constructed; thirdly, concrete breast boards are installed; fourth, the gabion high retaining wall is constructed; fifthly, working procedures are circulated; and sixthly, the surface of the gabion high retaining wall is afforested. The slide-resistant piles, gabion net cages and compacted filling act jointly to form an integrated structure for jointly bearing loads, and the slope of the steep slope roadbed can keep lasting, stable and long-term safe operation. By protecting the slope in a combination manner, the gabion high retaining wall can be in a steep step manner, the slope cutting earth quantity and the earth surface damage are reduced, and the filling, lands and vegetation resources are saved. Meanwhile, soil and vegetation can be planted into holes of building stones of the gabion high retaining wall, slope greening and ecological restoration are facilitated, and landscape, ecological and environmental-friendly benefits are produced.

The invention discloses a treatment method of deviation and fracture remediation of a pile body of a filling pile. The treatment method of the deviation and fracture remediation of the pile body of the filling pile is characterized by comprising the following steps: 1) dynamically determining the defect position of the pile under low stress; 2) rectifying the deviation of the pile body; 3) drilling and coring the top of the pile, wherein the coring length exceeds the defect position, and is 1-2 times of the diameter of the pile body; 4) flushing holes with high pressure, namely clearing filled materials of mud and the like in the defect position; 5) clearing the holes, namely returning sink residue in core holes out of the core holes; 6) filling the holes by high-pressure cement paste, namely filling cracks in the defect position; 7) inserting pipes, namely inserting slurry filling pipes, special accelerator pipes and paste discharge pipes; 8) sealing the holes, namely sealing the top parts of the core holes; 9) filling paste under high pressure, namely filling cement paste into the core holes; 10) carrying out backfill consolidation grouting on a soil discharge area and an empty hole area close to the pile. The method provided by the invention is simple and feasible, the working period of filling pile quality defect remediation treatment is short, the remediation construction cost is low, the original engineering design change is small, the quality of the remedied pile is reliable, and he original defect pile can be remedied and can achieve the standard through low-stress dynamic repeated determination.

This invention is a new non-support, long distance compensating method of underground pipe and its system. First, the pipes to be laid are arranged on the underground foundation. Then, two or more than two rotating compensators are assembled at the set compensating positions to compensate the pipe length change owing to expansion with heat and contraction with cold. The system includes conveying pipeline, which is buried underground and is composed of several main pipelines and branch pipelines; compensating device which is arranged between main pipelines, between main pipelines and branch pipelines or between branch pipelines. The compensating device is composed of rotating compensator and connecting pipe. This invention makes construction easy and convenient. The pipeline is safe.

The invention discloses a metal low-temperature film storage tank for liquid hydrogen storage. The storage tank comprises an outer tank (1), an inner tank (2), an inner and outer tank high-vacuum interlayer (3), a multi-layer winding layer (4), a secondary insulation cold insulation layer (5), a secondary shielding layer (6), a main insulation cold insulation layer (7) and a main shielding layer (8). An insulating support block (9) is arranged between the storage tank outer tank (1) and the storage tank inner tank (2). Two layers of metal films and a high-vacuum heat insulation tank are used as the design basis, an independent film shielding layer liquid containing system is achieved, the insulation and cold insulation performance of a traditional film type storage tank is improved in a high-vacuum heat insulation mode, the evaporation rate is further reduced, and the storage time of liquid cargo hydrogen in the storage tank is prolonged; the film shielding layer is used for containing liquid, so that requirements on materials of the inner tank and the outer tank and construction requirements are further reduced; and the safety performance of hydrogen storage is improved through double-layer shielding and three-layer protection of the inner tank, the shielding completeness under sudden accidents is guaranteed through the flexibility of the thin film, and the accident risk of leakage of a large amount of liquid hydrogen caused by breakage of the inner tank and the outer tank is reduced. The storage tank can be used for storage and transportation of a vehicle-mounted container type liquid hydrogen storage tank, can also be used for a land large vertical liquid hydrogen storage tank, can also be used for storage and transportation of a liquid hydrogen ship fuel cabin and a liquid hydrogen transport ship liquid cargo cabin, and is a brand-new liquid hydrogen film type storage tank which is wider in application, safer and more environmentally friendly.