41results about How to "Reduce the technical difficulty of construction" patented technology

The invention discloses a multifunctional split bolt and application thereof. Steel plates are penetratingly mounted at two ends of a bolt bar. The bolt bar is fixedly connected one steel plate by means of welding. A pair of positioning clamps for fixing rebar positions is welded on the bolt bar between the two steel plates. Fastening nuts are fitted at two ends of the bolt bar. When the split bolt is used in a composite structure with building prior to pouring, construction speed is increased, construction efficiency is improved, bonding degree and tightness of interfaces of different materials are enhanced, overall performance of a structure is improved, usability of the structure is more reliable, maintenance is reduced, service life of a project is prolonged, accuracy and reliability of rebar protective layer control are higher, soakage resistance and erosion resistance of concrete is guaranteed to be more reliable, formwork mounting and strengthening are more convenient and faster, influence of building verticality and evenness can be eliminated, construction accuracy is higher, common signal side formwork lateral supports can be reduced, construction difficulty can be lowered, cost is saved, and the split bolt is suitable for double-side formwork construction and embedded part positioning mounting of walls and board components.

The invention discloses a leaking stoppage method and structure for a karst pipeline. According to the method and structure, soybeans (4) and quick-setting mortar (3) are mixed, stirred, wrapped in a film bag (2) and then placed in an inlet of a leakage point of the karst pipeline (1); the soybeans (4) make volume in the film bag (2) be expanded by utilizing the expansibility of itself before solidification of the quick-setting mortar (3); the quick-setting mortar (3) quickly solidifies while the volume of the film bag (2) is expanded; after the quick-setting mortar (3) solidifies, the film bag (2) is tightly attached to the periphery of the karst pipeline (1) to produce friction and stops flowing, and therefore the leakage stoppage purpose for the karst pipeline (1) is achieved. The leaking stoppage method and structure are low in construction technical difficulty, simple in construction procedure, low in investment and capable of achieving a good leakage stoppage effect and being widely applied and popularized in the technical field of leakage stoppage of the karst pipelines.

The invention relates to a bentonite anti-seepage and anti-salt corrosion cement concrete additive. The anti-seepage and anti-salt corrosion cement concrete additive is prepared by mixing modified bentonite and a conditioning agent, wherein the conditioning agent is a mixture of active silicon dioxide power and a water reducing agent, and the mass ratio of all the components is as follows: modified bentonite: active silicon dioxide powder: water reducing agent=100: (3-30): (0.3-3.5). The anti-seepage and anti-salt corrosion cement concrete additive is used for preparing cement and concrete. The anti-seepage and anti-salt corrosion cement concrete additive provided by the invention has the advantages of large geological reserves of the used raw material bentonite, wide distribution range, wide range of sources, low cost, good economy and simple and convenient using method.

The invention discloses a construction method for steel sheet pile cofferdam on an underwater exposed bedrock. According to the method, steel sheet pile cofferdam can be constructed without grooving the exposed bedrock on an underwater plane. A covering layer is formed through sand filling, a construction environment that the covering layer is formed underwater is built, then a conventional steel sheet pile cofferdam construction technique is adopted directly, and steel sheet pile cofferdam construction is finished. The work of formation of a mounting groove through drilling on the water surface is omitted, the construction cost is effectively reduced, the construction cycle of a project is shortened, and the work efficiency is improved; a basic covering layer for steel sheet pile positioning is formed through sand throwing and filling, the construction environment that a covering layer is formed on the exposed bedrock underwater is built, steel sheet piles are subjected to insertion and closure construction, and then steel sheet pile cofferdam construction is completed. The method does not require underwater construction of mounting grooves, the steel sheet piles are accurately positioned, the difficulty of the construction technique is small, requirements for equipment are reduced, and high-efficiency and high-quality cofferdam construction is realized.

The invention relates to a method for pouring different grades of concrete to beam column junctions. The method includes the following steps: a step 1, binding column reinforcing steel bars till the height is higher than an upper surface of an upper floor; a step 2, establishing column plates and a support system on the bottoms of upper beams; a step 3, establishing a scaffold steel pipe support system and templates of upper beams and plates, and binding beam reinforcing steel bars; a step 4, inserting a row of isolation reinforcing steel bars in beams on the column beam junctions, wherein the isolation reinforcing steel bars are higher than the upper surface of the upper floor; a step 5, pouring column high grade concrete to the top surfaces of the isolation reinforcing steel bars with vibrating and compacting the concrete; and a step 6, pouring low grade beam plate concrete before initial set of column top concrete, pulling out of the isolation reinforcing steel bars, performing vibrating and compacting, and completing the pouring work of the concrete. The construction method can use local materials which are low in cost and can be reused; and the construction method is low in construction technological difficulty, can save workers, is high in operability, is good in construction effect, and can separate beam and column concrete.

A shallow-buried tunnel section construction method comprises the following steps that tunnel front half section construction is carried out, wherein a supporting structure and a waterproof curtain are constructed from one side of a riverway to the center of the riverway to form a first cofferdam; tunnel center island construction is carried out, wherein a steel seal door and an inserted and hit steel plate pile are mounted at the position, on the inner side face of the riverway, of the first cofferdam, then the two sides of the position, of the inner side face of the riverway, of the first cofferdam are finished to form island heads, and a center island is formed; tunnel rear half section construction is carried out, wherein the center island and the other side of the riverway are utilized for constructing a supporting structure and a waterproof curtain to form a second cofferdam, tunnel rear half section construction is carried out after water drawing is carried out, and after construction is completed, full-line navigation opening up is restored. The shallow-buried tunnel section construction method has the advantages of being feasible in technology, economical, reasonable, simple in process, easy and convenient to operate and safe in construction and meets the development direction of the modern engineering technology, and therefore wide popularization prospects are achieved.

The invention belongs to the field of building construction, and relates to a construction method of a high-altitude large-cantilever concrete beam and slab structure. The construction method involves a cast-in-place concrete large-cantilever structure beam and an assembled prefabricated concrete composite slab, and the cast-in-place height of the structure beam is reduced through reinforcement optimization; after the beam body concrete strength grade of the cast-in-place concrete large-cantilever structure beam reaches 100% or above of the design strength, a formwork supporting system for the cast-in-place cantilever structure beam is dismounted; the prefabricated concrete assembled composite slab is arranged by means of the cast-in-place concrete large-cantilever structure beam, and no supporting system is arranged on the lower portion of the prefabricated concrete assembled composite slab; and connecting steel bars of the composite slab and the structure beam are assembled, laminated layer concrete is poured, and finally the complete high-altitude large-cantilever concrete beam and slab structure is formed. According to the construction method of the high-altitude large-cantilever concrete beam and slab structure, the construction cost investment for mounting and dismounting a formwork is greatly saved, and the construction method has the advantages of low risk of high-altitude work, simple process, convenient operation, high construction speed, high quality standard, high construction mechanization degree and the like.

The invention discloses a single-component woodware color modifier easy to construct and a preparation method of the single-component woodware color modifier. The color modifier comprises the following compositions in percent by weight as follows: 80-87% of organic solvent, 1.8-3% of aldehyde ketone resin, 1.2-2% of acetate solvent, and 10-15% of color concentrate solution, wherein the color concentrate solution is obtained by dissolving a color concentrate into the organic solvent, and the mass concentration of the color concentrate solution is 0.01-49%. The detection and trial prove that the single-component woodware color modifier has excellent tinting strength and does not affect the adhesive force of a coating; in the construction, the smell is small, the construction can be carried out easily, no spraying operation is needed, and the brushing and coating operations can be carried out only by a worker; particularly after the construction, the texture of wood is clear, the three-dimensional layered effect is excellent, the coloring effect can also be easily mastered by a construction worker, and the construction is quick and convenient.

The invention relates to a control method of a programmable logic controller. The method includes a method for controlling a programmable logic controller (PLC) by configuration programming using electrical and instrumentation national standard graphic symbols. By dragging symbols in a built-in graphic symbol library of a device, a program in a paper pattern electric installation style is rapidlyconfigured, and then the graphic symbols which are completed in configuration are corresponding to switching quantity input and output ports and analog quantity input and output ports of the programmable logic controller, to realize collection and port control actions. The method enables an electrical designer to configure and program a design program in the form of an electric installation drawing, to realize control of programmable logic controller. Configuration programming is simple and intuitive, and can replace ladder diagrams, sentence tables and other tedious programming methods currently used in automation engineering, so as to reduce time cost for projects, reduce difficulty of construction technology for engineering technicians, and provide a visual and simple programming interface for later maintenance personnel to modify and add ports.

The invention relates to a downward single-drift type layered filling mining preparation layer arrangement method. The method comprises the following steps that S1, after a section connection roadway is constructed from an opening of a vein outer section roadway to an ore body footwall by a certain distance, a short vein connection roadway is constructed along one side of a vein; S2, a short vein is tunneled from the short vein connection roadway to an ore body hanging wall, and then a reinforced concrete artificial false roof and bottom is constructed in the short vein; S3, after the strength of the reinforced concrete artificial false roof and bottom meets the requirement, a retaining wall is constructed on the reinforced concrete artificial false roof and bottom, and the reinforced concrete artificial false roof and bottom is filled with paste for roof connection; and S4, a next short vein is constructed, and the step S2 is repeated. According to the method, construction is easy and convenient, the stability in the tunneling process is good, and the safety performance is better.

The invention discloses an anchor cable-reinforced soil combined retaining member and a construction method thereof, and belongs to the technical field of slope support. Tge anchor cable-reinforced soil combined retaining member comprises stand columns and wall surface modules; the stand columns are provided with inserting grooves; the wall surface modules are inserted into the inserting grooves of the stand columns on the two sides; connecting components are arranged on the inner side faces of the wall face modules, and gaps are formed between the connecting components and the wall face modules; one ends of the reinforced materials are arranged on the connecting components in a sleeving mode and clamped in the gaps, and padding is arranged between the upper reinforced materials and the lower reinforced materials; and when the soil body settles, the reinforced materials can move downwards along the connecting components. The side slope bearing capacity and the deformation resistance are remarkably improved, the problem that reinforcement materials in an existing connecting structure are prone to being damaged is solved, and the anchor cable-reinforced soil combined retaining member is suitable for various geological conditions.

The invention relates to the technical field of connection terminals, in particular to a box-type combined total terminal box for a secondary line collection terminal of a 220kV novel composite apparatus. A semaphore collection terminal block, a partition plate, secondary line collection terminal blocks of a current transformer, a heater, a DC bus bar and DC air switch, AC bus bars, an AC air switch and a headlamp are arranged in a box body; and the box body is total terminal box formed by combining two parts of box bodies in which the same equipment is internally arranged. According to the box-type combined total terminal box, the semaphore of split-phase equipment is collected into the terminal box, so that the field construction workload is reduced, the technical difficulty of construction is lowered and the consumable materials are saved. Meanwhile, the box-type combined total terminal box has the beneficial effects that the box-type combined total terminal box has rainproof and moisture-proof functions, the temperature of the box body can be automatically adjusted and controlled, cable connection is facilitated, the field construction workload is reduced, the technical difficulty of construction is lowered and the consumable materials are saved. The power requirements of the split-phase equipment can be met, the power supply stability of an AC system is ensured, AC in a field region is designed according to loop network power supply, interval completion of an AC/DC loop network is facilitated and the power supply system is stable and reliable.