285results about How to "Solve construction difficulties" patented technology

The invention relates to the field of bridge buildings, in particular to a steel trestle provided with a steel anchor pile and a construction method of the steel trestle. The steel trestle comprises a steel pipe support structure and the steel anchor pile, wherein the steel anchor pile is of a cylindrical and hollow tubular structure, reinforced concrete is poured in the steel anchor pile, the lower end of the reinforced concrete is fixed on a riverbed, and the steel anchor pile is connected to the steel pipe support structure through a first truss structure; a bailey truss which is arranged along the bridge direction, a transverse distributive girder which is arranged along the transverse bridge direction, and a longitudinal distributive girder and a bridge panel which are arranged along the bridge direction are fixed on the upper end of the steel pipe support structure from bottom to top in sequence. According to the steel trestle provided with the steel anchor pile and the construction method of the steel trestle, the horizontal force borne by a steel pipe pile is resisted by utilizing the steel anchor pile, so that stability of the steel pipe pile is effectively enhanced, furthermore, through drilling in the steel anchor pile, the depth for vibration sink of the steel anchor pile is reduced and the construction difficulty is reduced. The problem of difficulty in construction of the steel pipe pile with large flow speed in a cobblestone area is effectively solved, meanwhile, structural stability of the steel trestle is effectively improved, and the promotion value is great.

A preparation method of a high-electric-conductivity graphene/natural rubber nano-composite is applicable to the field of strain-sensitive sensors, solvent-sensitive sensors and other sensors. The preparation method includes: first, preparing graphene oxide/natural rubber nano-composite by means of solution film-spreading, and reducing in situ graphene oxide in the composite at room temperature by using hydrogen iodate; the prepared graphene/natural rubber composite has three-dimensionally continuous graphene conductive grid structure and has very low conductivity threshold and excellent conductivity. The problem that the graphene oxide easily aggregate during reduction and graphene is difficult to disperse in a rubber matrix, and a preparation technology is greatly simplified.

The invention discloses an intermediate-jacking-station-free jacking construction device of an ultra-long pipe roof and a method thereof. The device comprises a tunnel portal pressurizing device and a pipe roof steel pipe, wherein the tunnel portal pressurizing device comprises a soil body, a jet-grouting pile and a grouting pipe; the jet-grouting pile and the grouting pipe are arranged outside the soil body; the jet-grouting pile is as a sealed waterproof wall; a steel protection cylinder is arranged in the jet-grouting pile; an outer end of the steel protection cylinder is orderly provided with a sealing rubber ring and a steel plate ring; a blind plate connected with the grouting pipe is arranged outside the steel plate ring. A lubricating grouting hole and a grouting connection and control device are arranged on the steel pipe of the pipe roof to reduce jacking resistance, at the same time, pressure of 0.1-0.5 mPa is formed in a 35 mm gap between a soil hole and peripheries of the pipe so as to resist deformation of a soil cave, and achieve the purpose of controlling settlement of a road face above the soil cave. The device and the method provided by the invention have the advantages that negative factors caused by an intermediate jacking station structure in use are removed on the basis of carrying out the intermediate-jacking-station-free jacking method; the problem that jacking construction of the ultra-long pipe roof is difficult is solved; the jacking force for construction is small; the construction precision is high; and the settlement degree is low.

The invention discloses a concrete foundation slab restoring method for a preformed water collecting well for higher underground hydraulic pressure, and relates to the technical field of building construction. The method comprises the following construction steps: (1) fabricating a water lowering pipe, wherein the lower section of the water lowering pipe is coated with a filter screen and a bottom filter screen is arranged at the bottom end of the water lowering pipe; (2) placing the water lowering pipe into the water collecting well, placing a water pumping pipe into the water lowering pipe for water pumping, pumping out the water lowering pipe filled with underground water, and performing flash set concrete pouring to the foundation slab in the water collecting well except the water lowering pipe, and performing continuous water lowering during pouring; (3) when the poured concrete achieves certain strength, stopping water lowering, withdrawing the water pumping pipe of the pump, and plugging the water lowering pipe by adopting a concrete cylinder, a coarse sand packing layer and a rubber water-seal piston from up to down; (4) performing flash set concrete pouring to the upper section of the rubber water-seal piston in the water lowering pipe. During concrete foundation slab restoring process for the preformed water collecting well, the method can efficiently solve the problems of construction difficulty and incapability of ensuring the restoring quality caused by over high underground hydraulic pressure.

The invention relates to an anticorrosion paint primer composition. The anticorrosion paint primer composition comprises a component A and a component B. The component A comprises, by weight, 15-30 parts of hydroxy acrylic resin, 2-10 parts of polyaspartic acid resin, 10-50 parts of an antirust pigment, 0.5-3 parts of a coloring pigment, 5.5-23 parts of titanium dioxide, 0.1-2 parts of a dispersant as an assistant, 1-10 parts of a machine washing liquid as an assistant, 0.1-2 parts of an anti-settling agent as an assistant, 0.1-1 part of a leveling agent as an assistant, 1-10 parts of a solvent, and 10-30 parts of a filler. The component B comprises 5-30 parts of aliphatic polyisocyanate. The anticorrosion paint primer composition has a tridimensional net structure, has ultra-strong resistance to acid, alkali and salt chemical products by use of a carbamido group, has excellent ultraviolet resistance and outdoor performances by accurate control of a ratio of all the ingredients, solves the problem that carbamido paint construction is difficult, does not need special-purpose equipment, is suitable for routine construction and has excellent workability.

The invention discloses an assembled type shear wall upper-layer and lower-layer combined connection structure which comprises an upper-layer prefabricated wall and a lower-layer prefabricated wall which are connected in a butted mode. When the upper-layer prefabricated wall and the lower-layer prefabricated wall are connected in the butted mode, a downward-protruding supporting structure of the upper-layer prefabricated wall is supported on the lower-layer prefabricated wall, structural longitudinal ribs of an embedded column of the upper-layer prefabricated wall and structural longitudinal ribs of an embedded column of the lower-layer prefabricated wall are opposite in a one-to-one mode and are connected mechanically, the structural longitudinal ribs I of the upper-layer prefabricated wall and the structural longitudinal ribs II of the lower-layer prefabricated wall are connected in an overlapped mode, and the upper-layer prefabricated wall and the lower-layer prefabricated wall are connected at the joint through a cast-in-place concrete structure. The combined connection way combined with the cast-in-place concrete structure is formed through mechanical connection, steel bar splicing and concrete spraying, the wall prefabrication technology is simpler, on-site construction is more convenient and rapider, and the workpiece manufacturing cost and the construction cost can be reduced.

The invention discloses a tunnel construction trolley. The tunnel construction trolley comprises a walking mechanism, a lifting platform, a drill arm mechanism, a lifting mechanism and a power and control device, wherein the walking mechanism is located on the bottom of a trolley body, and the power and control device is installed on the walking mechanism; the lifting platform is arranged above the walking mechanism in a liftable mode; the drill arm mechanism and the lifting mechanism are both installed on the lifting platform; the power and control device controls the lifting platform, the drill arm mechanism and the lifting mechanism to act. According to the tunnel construction trolley, anchor protection and lifting are integrated, not only can the construction requirement for the inland tunnel anchor bolt support be met, but also the mechanization and the automation of large section tunnel anchor bolt support work are achieved, the labor intensity is relieved, the efficiency is improved, and a better guarantee of the tunnel engineering quality is achieved.

The invention relates to a method for detecting the using state of a multi-span continuous beam of the existing railway, comprising the following steps of: building a vehicle-bridge dynamic analysis model by applying a dynamic finite element theory, and carrying out analog computation on the dynamic strain value of a bridge when a train passes by taking the irregularity of an actually measured track as excitation and adopting a numerical method so as to obtain the strain control threshold value of a detection point of a support section of the multi-span continuous beam; arranging transducers at least comprising strain transducers on the bottom surface and the side surface of the support section of the multi-span continuous beam of the existing railway, measuring a response signal when the train passes, and processing the response signal to obtain the detection strain value of the detection point of the support section; and when the detection strain value exceeds the threshold value of an envelope curve, sending early warning. The method can be adapted to the conditions of various villainous weathers, extreme environments, and the like, can carry out remote transmission, is convenient to construct by arranging a measure point on the support section and realizes the dynamic real-time automatic long-term detection of the using state of the bridge.

The present invention is direct buried underground heat exchanger formed through reforming used engineering precipitating well. While the engineering precipitating well after completing normal precipitating task is refilled, U-pipe heat exchanger, spiral pipe heat exchanger or other tubular heat exchanger is inserted, well closing material is filled between the well wall and the heat exchanger, heat insulating material is filled near the well top, and the heat exchanger is connected to ground pipeline. By means of pumping out water and refilling water and the underground heat exchange, a closed geothermal heat pump type underground heat exchanger is formed.

The invention discloses a large-span roof steel truss structure and an accumulative slipping construction technology. A single arch truss is spliced by three sections of trusses, and a steel pulling cable is arranged at the bottom chord of the arch truss; with the adoption of support jig frames, multiple sections of large-span trusses are subjected to sectioned hoisting and airborne assembling; with the adoption of the mode that long guide rails are arranged on parapet walls and short guide rails arranged on the support jig frames, a multi-point advancing scheme of arranging slipping equipment at multiple points is implemented; by means of addition of bracket slipping shoes, a working plane where the trusses are located is separated from a working plane of guide rail slipping, so that the problem of construction difficulty of mounting the steel pulling cable firstly and slipping the trusses later is solved, the mounting method of the airborne assembling of the multiple sections of large-span trusses and overall slipping of the multiple trusses is realized, and the structure and the construction technology have the advantages that the construction cost is reduced, the construction efficiency is improved and the construction is safe and reliable.

The present invention relates to a device and construction method for alternatively jacking a hyperbolical closed type steel grid structure step by step, and the problem that an existing fixed jacking device cannot move in the radial direction and cannot jack a vertical hyperbolical closed type steel grid structure is solved. The device comprises slip tracks; a cross-shaped platform is disposed on each slip track; each cross-shaped platform is provided with rolling wheels; four corners of each cross-shaped platform are provided with vertical supporting legs; supporting bars are connected between the adjacent vertical supporting legs; the tops of the vertical supporting legs are provided with load-bearing platforms; each load-bearing platform is provided with a position adjusting channel steel track; a jacking supporting block is disposed in each position adjusting channel steel track; an upper surface of each jacking supporting block is provided with a spherical groove; a hydraulic jack is disposed on each cross-shaped platform; the top of each hydraulic jack is connected with the vertical supporting legs; and the bottom of each hydraulic jack is connected with a telescoping support. The device and construction can facilitate jacking and installation of the structure, and synchronism and convenience of the jacking and installation are improved.

The invention relates to a connecting node of a beam and a column of building steel structures, in particular to a connecting node of a square steel pipe column and H-shaped steel beams for multi-layer and high-rise steel structures. The connecting node comprises a square steel pipe column, H-shaped steel beams and T-shaped steels; the T-shaped steels are arranged on the lateral wall of the square steel pipe column and the upper and lower wing edges of the H-shaped steels; webs of the T-shaped steels are connected with the wing edges of the H-shaped steel beams; and the wing edges of the T-shaped steels are fixedly connected with the lateral walls of the square steel pipe column. According to the connecting node of the square steel pipe column and the H-shaped steel beams, the connecting node is simple in structure, and the problem of construction difficulty in installing an internal separating plate is solved; a plastic hinge shifts outwards and better shock-absorbing property is achieved; the construction of an upper floor and the casting of concrete in the square steel pipe are not influenced; and the steel consumption is low. Therefore, the connecting node has high economic and social benefits.

The invention discloses a pipeline intelligent collection system for solid waste and domestic garbage, which includes a garbage throwing unit, an automatic recovery unit, a conveying pipeline, centralized collection equipment, a negative pressure power source device and a control center. The garbage disposal unit can classify and recycle garbage, detect multiple indicators in real time, crush, and pre-select ironware, and is equipped with an airtight valve at the connection with the conveying pipeline; the automatic recycling device includes an automatic collection trolley and an intelligent docking device; the conveying pipeline connects the garbage The delivery unit and the central collection equipment are equipped with anti-blocking devices at the climbing, crossing and corners of the pipeline; the control center generates negative pressure in the conveying pipeline by controlling the negative pressure power fan, and collects the garbage from the garbage delivery unit and the automatic collection trolley. Central collection facility. The invention realizes metering recovery and public release, is suitable for use in the Chinese market, and truly achieves high intelligence, full automation, low power consumption, no noise, no blockage, completely sealed operation, zero pollution, and no leakage.

The invention relates to a deep thick mud pool cast-in-situ bored pile comprising a cement-mixing pile and a cast-in-situ bored pile. The cement-mixing pile and the cast-in-situ bored pile enter an unsolidified zone through a shallow solidified hard shell layer, the cement-mixing pile comprises a mixing pile reserved hole, an enlarged pile top and a partially-enlarged pile body, the cement-mixingpile is arranged in the mixing pile reserved hole, the enlarged pile top is arranged at the upper end of the cement-mixing pile, and the partially-enlarged pile body is arranged at the lower end of the cement-mixing pile; the cast-in-situ bored pile includes a pile casing fixing cylinder with an end plate, an inner steel pile casing, an outer steel pile casing, an opening-and-closing lifting rod,a casing pipe, an integral cutting opening formwork with a cutting edge and a steel reinforcement cage limiting frame. The deep thick mud pool cast-in-situ bored pile has the beneficial effects that construction of a pile casing reserved hole can be carried out before the shallow solidified hard shell layer is solidified, a steel tube for being reserved in the hole is embedded, then the pipe casings are pulled out and a hole formwork is buried, therefore the problem of the construction difficulty of the mixing pile reserved hole after the shallow hard shell layer is completely hardened is effectively solved, and the construction efficiency is improved.

The invention belongs to the technical field of civil engineering, and discloses a microorganism sand pile forming device and a microorganism sand pile forming method. The microorganism sand pile forming method mainly comprises the following steps: a bacterium solution having certain activity is mixed with a calcium chloride solution and a urea solution, a mixture is injected into sandy soil in a thin-walled cylinder through a grouting pipe, a solution after reaction is pumped out through slurry recycling pipes, grouting and slurry recycling are carried out repeatedly for 2-3 times, a new mixed solution is adopted, and the previous steps are repeated for 3-5 times till pile forming is completed. The microorganism sand pile forming device and the microorganism sand pile forming method take undisturbed sand as an engineering construction material in island-reef and desert areas, and employ a microorganism solidification technology for pile forming, no pore forming is required, the disturbance of in-situ grouting is little, the construction is simple and convenient, the pile forming quality is high, the possible problems that the transportation volume of mechanical equipment and raw materials is high, the construction is difficult, a safety risk is high and ecological environments of the island-reef and desert areas may be destroyed when sandy soil pile foundations are constructed in the island-reef and desert areas can be solved effectively, and the microorganism sand pile forming device and the microorganism sand pile forming method have important significances.

The present invention discloses color facing binding material palletizing process, which includes the following steps: 1. mixing materials; 2. reaction at 160-220 deg.c for 6-10 hr; 3. adding demolding agent and surfactant and stirring to obtain the binding material; and 4. vacuum debubbling the binding material, adding stuffing and colorizing agent at the temperature 20 deg.c higher than the softening point and mixing, extruding in an extruder, cooling, settling and cutting to obtain pelletized color facing binding material. The pelletized color facing binding material has easy use and high construction efficiency.

The invention relates to an ecological protection structure suitable for a bumpy rock slope and a construction method. The ecological protection structure comprises cement soil sprayed on a slope surface, an iron gauze laid on a cement soil layer, a short anchor rod for fixing the iron gauze and a base material spraying layer; the base material spraying layer is located on the cement soil layer; and the base material spraying layer comprises a base layer containing no mixed plant green seeds and a surface layer containing mixed plant green seeds. Base materials of three technologies are adopted, cement soil layer and vegetation concrete spraying construction can be completed through a dry type concrete spraying machine or a soil dressing spray-seedling machine or a wet type spraying machine according to the different base materials, the construction process is simple, the construction period is short, the construction cost is low, the method is suitable for slope protection and ecological restoration of uneven rock slopes, and wide application prospects are realized.

The invention discloses a construction method of an extra-long-span stiff skeleton. The method comprises the following steps that fastening stay systems are erected at the two ends of a valley, sections are symmetrically spliced from the two edges of arch supports to obtain preset sections, stiff skeleton sections are spliced from the wide end of the valley to the narrow end of the valley till thesections are folded, and an arch ring stiff skeleton is obtained; in-pipe concrete is pressed and injected into a steel pipe of the arch ring stiff skeleton; after the in-pipe concrete reaches the design strength, outer wrapped concrete of the arch ring stiff skeleton is poured. By adopting the first-symmetric and then-asymmetric mode, only one hoisting platform is arranged, construction is greatly facilitated, safety is ensured, the project duration and cost are saved, construction difficulty caused by a steep terrain and a narrow construction plant is overcome, and the long-span stiff skeleton is smoothly installed.

The invention discloses a variable-cross-section structure for a deep sewer of a roadbed and a construction method thereof. The variable-cross-section structure consists of a lower small cross-section excavation region (2) and an upper big cross-section excavation region (1) arranged above the lower small cross-section excavation region (2). The operation of an excavator for the deep sewer is achieved by adopting a variable-cross-section sewer structure, and the fast construction of the sewer in a water-rich loose rock and soil body is achieved by the construction method which comprises the steps of prepressing, rock filling and back-excavating and staging and segmenting, so that the damages arising from the local mud drifting or the soil-flowing type collapse of the water-bearing loose rock and soil body and the serious construction safety problems of the damages, possibly caused by excavation disturbance are avoided.

The invention relates to a bamboo joint type sleeve pile and electroosmosis combined soft soil roadbed reinforcement system. The system is characterized by comprising an electroconductive plastic drainage plate, bamboo joint type sleeves, a prefabricated pile point and a prefabricated cover plate; the strip electroconductive plastic drainage plate tightly fits the outer sides of the bamboo joint type sleeves; the bamboo joint type sleeves are fixed through steel rings at certain intervals; the prefabricated pile point is arranged at the bottom end of a bamboo joint type sleeve pile; a U-shaped reinforcing bar is pre-buried in the prefabricated pile point; the bottom end of the electroconductive plastic drainage plate is connected with the U-shaped reinforcing bar; the prefabricated cover plate is arranged at the top end of the bamboo joint type sleeve pile; a preformed hole for allowing the electroconductive plastic drainage plate to pass through is reserved in the prefabricated cover plate; the electroconductive plastic drainage plate stretches out of the preformed hole; and the electroconductive plastic drainage plate is connected with a direct current power source through a conducting wire. The bamboo joint type sleeve pile and electroosmosis combined soft soil roadbed reinforcement system has the beneficial effects that the bamboo joint type sleeve pile is formed through connecting sections of bamboo joint type sleeves, and the problem that the construction is difficult due to the fact that the sleeve length of a conventional plastic sleeve pile is difficult to control is solved; and the bamboo joint type sleeves have bulges, so that the friction force of a common plastic sleeve pile and a surrounding soil body is improved, and the bearing capacity is improved.

The invention provides a high precision monitoring and early warning system and method for roof deformation, and relates to the technical field of roadway deformation monitoring and early warning. Thesystem comprises an explosion-proof optical fiber sensor, a sensor integration device, a signal conversion device, a data transmission device and a data processing unit, the explosion-proof optical fiber sensor converts a roof displacement signal into spectral information, the sensor integration device is connected with the explosion-proof optical fiber sensor within the same monitoring range, the signal conversion device is connected with the sensor integration device, so that the spectral information is converted into an electronic signal, and the data transmission device transmits the electronic signal to the data processing unit. According to the high precision monitoring and early warning system and method for roof deformation, when the system is used for monitoring, the explosion-proof optical fiber sensor is installed in a selected monitoring area, each component of the system is connected to monitor the displacement of a roof, a central controller and the data processing unitestablish a spatial three-dimensional model of surrounding rocks, the roof deformation is determined in real time according to the deformation monitoring and spatial coordinates, and monitoring is more accurate and convenient and also has the advantages of sensitivity and intuition.

A lateral restraining and reinforcing structure for stabilizing a high-fill embankment with a soft oil foundation built on a bed rock is used for the lateral restraining and reinforcing of the foundation of the embankment in a region which is limited in the construction of a dug pile. The stability problem of the high-fill embankment and the construction difficulty of the dug pile are overcome, and the problems of insufficient horizontal bearing capability and large deformation of the traditional cast-in-situ bored piles are improved. The structure comprises left reinforced concrete cast-in-situ bored piles and right reinforced concrete cast-in-situ bored piles, which are symmetrically arranged at slope toes at the two sides of the embankment in the longitudinal direction at an interval, left reinforced concrete top beams and right reinforced concrete top beams, which are fixedly connected with the left reinforced concrete cast-in-situ bored piles and the right reinforced concrete cast-in-situ bored piles into a whole are respectively arranged at the tops of the piles, and anchor cables of which the two ends are connected with the top beams in an anchoring way are arranged between the left reinforced concrete top beams and the right reinforced concrete top beams in the extension direction of the embankment at an interval.

The invention discloses a novel jacking pipe intersegment overhaul well, comprising a jacking pipe body, an overhaul well body and an overhaul well seat, wherein the jacking pipe body comprises a reinforced concrete jacking pipe and a jacking pipe steel plate wrapping the outer surface of the reinforced concrete jacking pipe; a preformed hole is formed in the jacking pipe body; the overhaul well body comprises a reinforced concrete shaft and a shaft steel plate wrapping the outer surface of the reinforced concrete shaft; the bottom end of the overhaul well body is connected vertically with the preformed hole in the jacking pipe body; the joint of the shaft steel plate and the jacking pipe steel plate is welded and fixed. During construction of the overhaul well body, the shaft steel plate can be directly pressed into a soil layer to be in contact with the jacking pipe body below, the shaft steel plate can be used as a soil retaining structure during the construction stage of the overhaul well body, and can also be used as an outer template and an outer side force component of the reinforced concrete shaft, the way that a foundation pit needs to be excavated and the overhaul well is then constructed for the traditional ordinary overhaul well is abandoned, the problems of excavation and support of the overhaul well during the construction phase are effectively solved, and the problem of difficulty in construction due to the existence of the jacking pipe is solved.