204results about How to "Good engineering quality" patented technology

The invention relates to a non-excavation tube pulling construction method which comprises the following steps: (1) preparation work: understanding stratum and underground condition, calculating the number of chambering and the size of a return compandor, and formulating the control data of a pipeline midline and elevation and correction measures; (2) measuring plane surface, controlling payingoff, and measuring the elevation of each pile; (3) setting an active well, and receiving and setting a drilling machine; (4) preparing drilling fluid; (5) drilling pilot holes,; (6) adopting the compandor to chambering, cleaning the hole at the same time, and protecting walls with slurry; (7) welding the pipeline; (8) pulling the tube, and simultaneously pulling a steel tube with the same length as that of the tube; (9) casting slip and fixing; (10) mounting tubes; (11) testing pressure and flushing. The invention can effectively increases economical benefit and social benefit, and has the advantages of environmental protection and energy saving.

The invention discloses a large-section loess tunnel construction method, which comprises the following steps that: the whole section is divided into an upper part, a middle part, a lower part and a bottom part, wherein the middle part is divided into a middle left area, a middle right area and a middle intermediate area, the lower part is divided into a lower left area, a lower right area and a lower intermediate area, the four parts are excavated in a benching tunneling method with altitude differences, the upper part is 3-5m in front of the front middle part, the middle part is 3-5m in front of the front lower part, the lower part is 10m in front of the front bottom part, and the step-by-step tunneling excavation is carried out. The invention is suitable for collapsed loess areas, realizes the safe and reliable construction and saves a large number of temporary supporting steel frames. Due to the arc-shaped pilot tunnel method, the loop can be formed rapidly during excavation, the disturbance to the surrounding rock is low, the primary support is stable, the traditional construction method is further improved to be the 'two-step and four-part excavation method', and the construction cycle period is short. Moreover, the invention can speed up the progress of the project, shorten the construction period, and reduce the cost of the project.

A projector includes: an optical component disposed inside a closed structure having air flow path through which air flows; and a circulating fan which circulates air. The closed structure includes: an optical component housing which accommodates the optical component; a duct which introduces air into the optical component housing, and introduces the air having flowed to the outside from the inside of the optical component housing again toward the inside of the optical component housing; and a plurality of heat exchangers each of which has a heat receiving side heat transfer member which faces the inside of the closed structure, and a heat releasing side heat transfer member which faces the outside of the closed structure. The plural heat exchangers are disposed in the air flow direction along the air flow path through which air flows to the outside from the inside of the optical component housing.

The invention discloses a building external wall surface brick paving machine. The building external wall surface brick paving machine is characterized in that the machine comprises a wall brick containing box used for being horizontally installed on the external wall surface of a building. Vertical wall bricks can be arranged and stacked in an inner cavity of the wall brick containing box, one end of the wall brick containing box is the open end and forms an outlet, and the other end of the wall brick containing box is provided with a wall brick push device. The wall brick push device can be used for pushing the wall bricks vertically arranged and stacked in the inner cavity of the wall brick containing box out of the outlet. A plastering grouting device used for performing grouting and plastering on a wall in front of the pushed-out wall bricks is disposed on the upper side of the open end of the wall brick containing box. A supporting lifting device is also included, used for making the outlet end of the wall brick containing box directly face the wall and be supported on the wall and capable of lifting the wall brick containing box upwards. By means of the building external wall surface brick paving machine, automatic flow paving of the building external wall surface bricks can be achieved, and the labor intensity of wall brick paving is relieved. The building external wall surface brick paving machine has the advantages that the working efficiency is high, the project quality is good, and the project quality consistency can be guaranteed.

Disclosed desulfurized-gypsum-base lightweight spraying gypsum mortar is composed of the following compositions in parts by weight: 50-65 parts of desulfurized gypsum, 20-30 parts of building sand, 3-5 parts of vitrified microsphere, 10-20 parts of stone powder, 0.1-0.5 part of a retarder, 0.1-0.3 part of cellulose ether, 0.02-0.04 part of an air-entraining agent, and 0.05-0.1 part of starch ether. The desulfurized-gypsum-base lightweight spraying gypsum mortar employs mechanical spraying for construction, possesses the dry density less than 1000 Kg/m<3>, the heat-conduction coefficient of 0.20 W/(m*K) and the compressive strength lager than 4.0 MPa, and possesses the characteristics of being light in weight, low in heat-conduction coefficient, high in strength and suitable for mechanical spraying construction, and the like.

A heat-insulating brick for outer wall comprises a heat-insulating member and a wall member, wherein the wall member is block-shaped and has an inner cavity; the heat-insulating member is filled in the inner cavity and made of foaming materials; and a plurality of barbs are arranged on the side wall of the inner cavity and any one of the barbs is embedded inside the heat-insulating member. A method for manufacturing the heat-insulating brick for outer wall is also provided, which comprises the step of combining the heat-insulating member with the wall member, wherein a die is firstly fabricated, sequentially the wall member is embedded in the die and then the foaming material is filled in the die cavity, heated steam is introduced into the die cavity to allow the expansion of foaming material, and finally the product is cooled and demoulded. The invention integrates the heat-insulating member with the wall member in the manufacturing process, and the connection with the building is realized by mechanical manner using fasteners such as expansion screws. The invention has the advantages of easy construction, no seasonal influence, less working hour, high bonding strength between the heat-insulating member and the wall member, and good construction quality.

The invention discloses an external wall brick paving method. The external wall brick paving method is characterized in that wall bricks are vertically arranged in rows; the wall bricks of all rows are gathered and arranged from front to back according to the actual paving sequence from bottom to top and put in a wall brick containing box of which one end is an outlet and the wall brick paving surfaces directly face the outlet; the outlet of the wall brick containing box directly faces a to-be-paved wall surface, and the wall brick containing box is controlled to be lift gradually; and in the lifting process, plaster is applied to the wall surface in front of the outlet of the wall brick containing box to achieve plastering, then the wall bricks are controlled to be pushed out in rows and attached to the already applied plaster, and paving is finished. Accordingly, the effect of paving the wall bricks in rows can be achieved, and the wall brick paving efficiency is greatly improved. By means of the external wall brick paving method, automatic flow paving of the building external wall surface bricks can be achieved, and the labor intensity of wall brick paving is relieved. The external wall brick paving method has the advantages that the working efficiency is high, the project quality is good, and the project quality consistency can be guaranteed.

The invention discloses a large-sized box jacking control construction method capable of enhancing accuracy. The construction method comprises the following steps of: arranging a plurality of cement stirring piles into a foundation pit on one side of a railway on which a frame bridge is required to be paved; reinforcing a subgrade soil body below the railway with cement water glass slurry to enhance the bearing force of a foundation; jacking a large-sized box towards the lower side of the railway by using jacking equipment; and preventing the large-sized box from being subjected to phenomena such as deviation, head tying or head raising and the like by different measures. By adopting the method, the positioning accuracy of the large-sized box can be ensured, good engineering quality and high safety are achieved, and normal operation of the existing railway is not obstructed.

A heat-dissipating device used in a projection display apparatus with an air outlet includes a fence module, at least one resilient member, and a shape memory alloy module. The fence module is disposed at the air outlet and includes at least one guiding plate with a pivot. The resilient member exerts a first force on the guiding plate to enable the guiding plate to rotate on the pivot, and the shape memory alloy module deforms when heated to exert a second force on the guiding plate to enable the guiding plate to rotate on the pivot.

The invention discloses a construction method for an H-type steel stiff column with a cross fracture surface. The construction method includes the steps of measuring and positioning, inspecting and checking before hoisting the H-type steel stiff column, hoisting the H-type steel stiff column in place, fixing the H-type steel stiff column temporarily, correcting the H-type steel stiff column, fixing the H-type steel stiff column, welding H-type steel stiff column and the like. The axis and perpendicularity of section steel column installation can be controlled accurately, structural construction is high in precision, construction quality is reliable, and the construction method is suitable for installation and construction of the H-type steel stiff columns with the cross fracture surfaces in a high-rise building, a super high-rise building, a long-span structure and a common structure.

The invention discloses a concrete pouring construction method for a steel plate embedded part, which relates to the technical field of construction engineering, in particular to an installation engineering technology of a steel plate embedded part. The method comprises the following steps of: fixing the steel plate embedded part on the inner side face of a template through a bolt; positioning the template; pouring concrete mortar; and detaching the template after concrete is molded. In the method, the steel plate embedded part is fixed with the template, and the template is taken as a support part of the steel plate embedded part, so that the steel plate embedded part is prevented from displacing in the pouring process of the concrete mortar at a later stage, and the molding quality is ensured. The method is convenient for constructing, the engineering quality is good, and the labor force and time for positioning the steel plate embedded part are saved.

The invention discloses a method for constructing a multi-functional metro interchange station complex, which comprises the steps of: performing high-pressure cement grouting on a foundation within design scope; construction of an underground reinforced concrete diaphragm wall; construction of a steel reinforced concrete underground grouting pile group; construction of well spacing pattern double prestressed steel fiber type ground structure floors; dryness of moisture in a soil body by stages; construction of a first underground floor; construction of a second underground floor; construction of an overhead platform metro shield tunnel, a bridge and an overhead platform; construction of a third underground floor; construction of a bottom platform metro shield tunnel, a bridge and a bottom platform; earthwork excavation under the bottom bridge and construction of column facing of the steel reinforced concrete grouting pile group; construction of steel reinforced concrete of a buttress type annular ground beam and steel reinforced concrete of a bottom inverted arch bottom slab; construction of bottom platform and overhead platform rails and the platforms; construction of a steel reinforced concrete light shaft and a steel reinforced concrete elevator shaft; construction of a ground floor; construction of a first floor; and construction of various pipelines, and installation and debugging of various equipment. The method has the advantages of less investment on the construction of metro interchange stations, short construction period, small construction quantity, high construction efficiency, and social resource economization.

The invention discloses a soft soil base large-scale steel floating box lock head construction method, which is characterized in that the specific construction steps comprise that: a foundation trench is excavated and silt is removed; a precast pile is beaten; a foundation bed is ripraped and a concrete cushion coat is poured and tamped; a steel floating box is precast and submerged; a waterproof purdah is jet grouted. Compared with the prior art, the invention has the characteristics of strong applicability, mass construction material saving, low construction cost and reliable construction quality; a lock head steel floating box can be also used as construction cofferdam; the soft soil base large-scale steel floating box lock head construction method is in particular suitable for building the lock head in an area with a soft soil base and deep water and can achieve good waterproof effect no matter how depth the foundation bed is.

The present invention provides a material and a method for its creation and use wherein a reactive element, preferably a rare earth element, is included in an oxide coating material. The inclusion of this material modifies the growth and structure of the scale beneath the coating on metal substrate and improves the scale adherence to the metal substrate.

The invention discloses a prefabricated laminated steel concrete two-hole culvert. The prefabricated laminated steel concrete two-hole culvert comprises a bottom plate 1, wall boards 2, cover plates 3, edge strips 4, an inner bottom plate 5, a cushion layer 6, a bottom waterproof plate 7, upper covering waterproof plates 8 and waterproof strips 11, wherein the cushion layer 6 is paved on an excavated foundation; the bottom waterproof plate 7 is spread on the cushion layer 6; the bottom plate 1 is cast on the waterproof plate 7 in situ; lines are placed on the bottom plate 1; the wall boards 2 at two sides and in the middle part are suspended on the bottom plate 1 and are finely adjusted, aligned and leveled; the two cover plates 3 are respectively placed at the top parts of the wall boards 2; the bottom plate 1 is connected with connecting ribs of the wall boards 2, and concretes are filled to form the edge strips 4 and the inner bottom plate 5; and construction gaps among the wall boards 2 and the cover plates 3 are subjected to waterproof gap blockage treatment, the waterproof strips 11 and the covering waterproof plates 8 are paved, the waterproof plates 7 and 8 are welded to form a seal, and soil is filled. The prefabricated laminated steel concrete two-hole culvert is convenient and fast in construction, good in quality, long in durability, waterproof, reliable and the like, and can be used as a culvert, a channel and a municipal integrated pipe ditch below urban roads and high-speed roads.

The invention discloses a large hopper manufacturing method, wherein the upper part of a hopper is equipped with a cylindrical barrel body, and the lower part of the hopper is equipped with a taperedhopper which is round and square. The large hopper manufacturing method is characterized by comprising the following steps of: a, unloading; b, drilling; c, bending and forming a wall plate of the hopper; d, assembling; e, welding; f, pre-assembling; and g, coating. The large hopper manufacturing method has the advantages that hopper manufacturing steps are reasonable in design, operability is strong, manufacturing is convenient, construction is simple and convenient, a construction period is short, project quality is guaranteed to be excellent, hopper manufacturing engineering cost is reduced, and the good result of saving 0.1035 million RMB is achieved.

The invention discloses an automatic internal pressure alarm system of a sealing film used in vacuum combined surcharge preloading. A pressure gauge of a vacuum preloading device is an electric contact pressure gauge; a normally-open contact of the electric contact pressure gauge is connected in parallel with one auxiliary normally-open contact of an intermediate relay and is then connected in series with a normally-closed contact of a reset button to a coil power supply loop of the intermediate relay; and another auxiliary normally-open contact of the intermediate relay is connected in series to a power supply loop of an audible and visual alarm. According to the automatic internal pressure alarm system, a structure that the electric contact pressure gauge and the audible and visual alarm work cooperatively is adopted, when the vacuum pressure is reduced to a set value, the audible and visual alarm is immediately started, and an operator on duty begin to check gas leak points at the first time, so the project quality is benefited; and meanwhile, the time, the machine fee and the electric charge needed by re-arriving at a design pressure are decreased, and the construction cost is reduced. Furthermore, the automatic alarm system has a simple structure, the mounting is convenient, the labor intensity is reduced to a great degree, the work efficiency is improved, the labor input is little, the cost is low, and the labor power, the material resources and the financial resources are saved.

The invention relates to a construction method for prefabricating a directly-buried uncompensated centralized heat supply pipeline by electrically preheating. The method comprises the following steps of: (1) grooving, adjusting the coordinate and scale height of the heat supply pipeline, and computing the preheating temperature and the designed elongation of the heat supply pipeline; (2) controlling the sand refilling height at a half to three quarters of the pipeline height H; (3) connecting the same-side end of the heat supply pipeline with preheating equipment through a cable respectively, and short-circuiting the other side of the heat supply pipeline through a cable; (4) arranging temperature sensors on the heat supply pipeline respectively; (5) recording the initial temperature of the heat supply pipeline and the initial position of a measuring point, starting temperature raising, controlling the temperature raising gradient within 1 DEG C per hour, and preserving heat after a preheating temperature is reached; (6) refilling sand into both sides of the heat supply pipeline, tamping, and controlling the preheating temperature within the range of +/-2 DEG C; (7) after the designed elongation is reached, shutting down the preheating equipment; and (8) performing subsequent construction according to the steps (1)-(7). The construction method disclosed by the invention is safe, reliable, easy and practical, is easy for accurately controlling construction equipment, and is consistent with the national policy of energy saving and emission reduction.

The invention discloses a method for manufacturing a reinforced concrete basement external wall. The method is characterized by installing a cork at the two ends of a pull screw with a water stop iron plate respectively when the pull screw is connected with an internal formwork and an external formwork, connecting reinforcing steel pipes to the two ends of the pull screw respectively at the external sides of the internal and external formworks, then pouring a reinforced concrete basement external wall in a conventional way, later, prying out the corks manually so that cork holes can be formed on the surface of the reinforced concrete basement external wall at the moment, cutting off the parts exposed out of the cork holes, of the pull screw, filling and leveling up the cork holes with waterproof mortar and then carrying out waterproof construction on the surface of the reinforced concrete basement external wall by the conventional method. The method has the advantages of construction convenience, high construction efficiency, good waterproof effect, low construction cost and good construction quality, and economic and social benefits can be brought to the enterprises by adopting the method.

The invention belongs to the technical field of underground excavation engineering and particularly relates to a modular construction system of an underground building and a construction method thereof which effectively solve the technical problem of high construction difficulty of underground space structure engineering and improve the safety and the degree of mechanization of underground engineering by utilizing a modular construction technology of fabricated construction. The modular construction system, provided by the invention, of the underground building comprises an original well and a reception well which are arranged in an underground excavation structure, wherein a pushing device is arranged in the original well, a traction device is arranged in the reception well, an antecedent pilot tunnel is also arranged between the original well and the reception well, a steel cable or a section steel pull rod is arranged in the antecedent pilot tunnel, one end of the steel cable or the section steel pull rod is connected with the traction device in the reception well, and the other end of the steel cable or the section steel pull rod is connected with a connecting piece reserved on the outer side of a main body structure of the building. The structural construction and the method thereof are suitable for development of huge underground spaces, therefore, a large area of open excavation engineering can be effectively avoided, the influence on the ground environment is small, and the social benefit is high.

The invention discloses a slate tile roof which sequentially comprises a concrete roof plate (1), a cement mortar leveling layer (2), a macromolecule coiled material waterproof layer (3), an extruded sheet insulating layer (4), a rigid waterproof layer (5) and a tile layer from inside to outside, wherein the slope of the slate roof is 35-50 degrees; the tile layer is composed of slate tiles (6); the slate tiles (6) are overlapped and hung on the tile-hanging bars (8) alternately and are fixed on the tile-hanging bars (8) by stainless steel nails (9); the slate tiles (6) and the base layer are fixed firmly, so that the slate tile roof has good integrity, waterproof performance, fireproof performance, anti-freezing performance, anti-corrosion performance and durability.

The invention relates to a titanium plate steel inner tank reversed construction device for a chimney of a thermal power station. The titanium plate steel inner tank reversed construction device is provided with a hoisting system foundation distributed on the outer side of a steel inner tube foundation in the circumferential direction, wherein an annular steel structure supporting system with a material inlet on the surface is fixed on the hoisting system foundation, the annular steel structure supporting system is arranged on the outer side of a steel inner tank, an outrigger is arranged at the top of the annular steel structure supporting system radially, a hydraulic hoisting system is installed on the outrigger, a box-type horizontal annular beam is arranged at the bottom of the hydraulic hoisting system, a clamping block welded with the steel inner tube is clamped on the box-type horizontal annular beam, and a draw bar is arranged between an outer tube wall of the chimney and the annular steel structure supporting system. The titanium plate steel inner tank reversed construction device has the advantages of being convenient to construct, clear in stress, easy and convenient to operate, high in safety coefficient and good in engineering quality and is particularly suitable for traditional chimney transformation engineering where bearing systems cannot be distributed at the top.

The invention discloses an uplift pile with an unfolding barb and a construction method thereof. The uplift pile comprises a precast tubular pile. The precast tubular pile comprises a maternal pile and a pile tip, wherein a pile body of the maternal pile extends from a pile tail to a cavity of the pile tip, one or more layers of vane pushing-away holes communicating with the cavity are formed in the pile wall of the maternal pile in the length direction of the pile body, the lower edges of the side, far away from the cavity, of the vane pushing-away holes are provided with vanes through rotary devices, the vanes can rotate away from the cavity around the rotary devices, and the cavity is provided with a force application part used for pushing the vanes away from the vane pushing-away holes. The construction method with the uplift pile with the unfolding barb is shown in the specification. Compared with a traditional precast pile, the unfolding vanes attached to the pile body work together with a soil body, so that the anti-floating design capacity of the uplift pile is greatly improved, the bearing capacity of the pile is improved by several times or even dozens of times, the number of piles and the length of the pile are greatly reduced, and the comprehensive benefits are quite remarkable.