8results about How to "Long construction period" patented technology

The application discloses a tunnel plug construction method and a tunnel plug structure, and the method comprises the following steps: S1, drilling holes along the circumferential direction of the inner wall of the tunnel in the plug area to form grouting holes, and grouting the grouting holes; S2, roughening the inner wall of the tunnel in the plug area; S3, installing an exhaust part, a grouting pipeline and a water stop part on the inner wall of the tunnel, the exhaust part is attached to the inner wall of the tunnel and forms an exhaust passage; S4, pouring concrete in the plug area to form a concrete plug block, the concrete plug block gradually cools and shrinks inward; and S5, grouting the joint between the concrete plug block and the inner wall of the tunnel by using the grouting pipeline. The inherent characteristics of the cooling and shrinkage of the concrete plug block are utilized, so that when the plug block shrinks, the exhaust part is driven to naturally separate from at least one side of the inner wall of the tunnel to form an air passage gap, and the air in the joint during the grouting process can be introduced into the exhaust passage in a directional manner through the air passage gap and smoothly discharged.

The application provides a self-cleaning water-based outer wall waterproof paint, which comprises the following components in mass fraction: 18-30% of a silicone-acrylate emulsion, 10-25% of a silicone resin emulsion, 5-15% of modified titanium dioxide, 5-15% of rutile titanium dioxide, 5-8% of super-hydrophobic talcum powder, 5-15% of heavy calcium carbonate, 3.3-6.1% of an additive, and the balance of water. Due to the good long-term hydrophobicity of the silicon compound in the emulsion molecular structure, the water molecules are prevented from penetrating into the paint film, and the long-chain alkyl of dodecyloxybenzoic acid increases the hydrophobicity of the titanium dioxide, so that good waterproof effect is achieved, the paint film is thicker and denser, the waterproof effect is better, the outer wall coating is fresh for a long time due to the lotus effect formed on the surface of the paint film, and the outer wall coating has strong hydrophobicity. Meanwhile, the application also has the advantages of simple construction, short construction period and low construction cost, and can be widely used for the decoration of surface coatings.

The utility model belongs to the field of purline connection, and particularly relates to an assembly type purline connection structure which comprises a truss upper rod, a hot galvanizing angle steel purlin support is arranged at the top of the truss upper rod, a purline body is arranged on one side of the hot galvanizing angle steel purlin support, and a hot galvanizing U-shaped bolt is movably inserted into an inner cavity of the hot galvanizing angle steel purlin support. According to the utility model, the hot galvanizing U-shaped bolt is connected to the inner part of the hot galvanizing angle steel purlin holder and the surface of the upper rod of the truss, and the hot galvanizing U-shaped bolt is stably connected to the outer side of the upper rod of the truss through the hot galvanizing bolt connecting base plate and the hot galvanizing nut; according to the invention, stable installation of the hot galvanizing angle steel purlin holder and the purlin body is realized, the installation efficiency can be improved when the purlin body is installed, the installation can be simple and convenient enough, meanwhile, an anti-corrosion layer coated on the surface of a rod on a truss is not easily influenced, and the workload of workers can be reduced.

The application discloses a method for dividing the end resistance and side friction of a pile foundation in a piling process based on piling records, and the method comprises the following steps: obtaining a curve of the hammering number changing with the depth in the piling process according to the field piling records; obtaining a curve of the relationship between the hammering number and the soil resistance; obtaining a curve of the soil resistance changing with the depth in the piling process by using the two curves; determining the upper and lower envelope lines of the curve of the soil resistance changing with the depth; drawing a straight line through the (0, 0) point and the lowest point of the lower envelope line; obtaining the curve of the soil resistance changing with the depth after eliminating the linear part by subtracting the straight line part from the curve of the soil resistance changing with the depth, and determining the new lower envelope line; fitting the side friction in the piling process by drawing a straight line through the original point, the lowest point and the final point of the new lower envelope line; and obtaining the end resistance of the pile foundation in the piling process by subtracting the side friction from the curve of the soil resistance changing with the depth. The end resistance and the side friction of the pile foundation can be conveniently obtained, and the calculation precision of the pile foundation drivability analysis is improved.

This invention relates to a rebar construction device for rapid turnover of precast box girder formwork, belonging to the field of precast box girder construction technology. It includes a main body and connecting rods (8) spaced apart. The main body comprises a base (1), columns (2), telescopic devices (5), and support rods (3). The columns (2) are positioned facing each other, with their lower ends hinged to the base (1), allowing the columns (2) to rotate inwards. The support rods (3) are spaced apart on the inner sidewalls of the columns (2) and facing each other. The upper ends of the columns (2) are connected via the telescopic devices (5), and adjacent columns (2) are connected as a whole via the connecting rods (8). This device does not occupy the bottom formwork (12). Rebar (13) is tied first, and after completion, the bottom formwork (12) is inserted, the telescopic devices (5) are retracted, and the rebar cage is positioned. The device's side formwork is then removed for installation. This solves the problem of existing methods where the bottom formwork is laid first and then the rebar is tied, resulting in the formwork being idle during the rebar tying construction period, and the difficulty of rebar tying without a platform.

This utility model discloses an adjustable hydraulic slope protection net, relating to the field of hydraulic construction technology. Its key technical features include: a foldable protective net panel with support mechanisms on both sides; each support mechanism includes a column, the side of which is hinged to the edge of the protective net panel; a weighted base fixedly mounted at the bottom of the column; a rotating block rotatably connected to the top of the column via a pivot; a limiting plate fixedly mounted on one side of the rotating block; a limiting space between the limiting plate and the rotating block, which is adapted to the limiting plate; and two support mechanisms that can be interlocked via the limiting plate. A limiting component is provided on the side of the rotating block away from the limiting plate to restrict its rotation. This utility model is easy to assemble and disassemble, improving assembly and disassembly efficiency.

The invention discloses a single-radial-plate radial ventilation rotor support, and relates to the technical field of rotor supports. To solve the problem; the rotor support specifically comprises a center body, radial plates, rib plates, magnet yoke rings and magnetic poles, the center body is located in the center of the whole rotor support, one end of the center body is fixed to a rotating shaft in a key connection mode, and the other end of the center body is connected with an output component; the radial plates are radially arranged on the outer side of the center body and the inner sides of the rib plates and are annularly distributed along the center body; the rib plates are arranged between the radial plate and the magnet yoke ring, the number of the rib plates is multiple, and the multiple rib plates are arranged on the upstream side and the downstream side of the radial plate; the magnetic yoke ring is welded on the outer side of the rib plate; and the magnetic poles are fixed on the magnet yoke rings and are detachably connected. The invention has the advantages of low material cost, low processing cost, short installation period, saved construction period and convenient installation.

The present application relates to the field of building technology, especially to a MICP-bionic structure sandwich reinforcement method for coral sand soil body, which comprises the following steps: S1, grading the undisturbed coral sand, using fine particles as sandwich material and using medium and coarse particles as main filling material; S2, laying 3D printed bionic geosynthetic material in the fine particles, sequentially injecting Paenibacillus pasteuria bacterial liquid and urea-calcium chloride cementing liquid, and alternately grouting multiple times after standing; S3, layering and stacking and compacting the composite sandwich and the main sand layer to build a layered composite structure; S4, repeating steps S1-S3. The present application combines ecological reinforcement technology with reinforcement technology to build a collaborative system of "layered construction-sandwich construction-whole reinforcement", which effectively improves the reinforcement effect and efficiency.