41results about How to "Avoid grouting" patented technology

The invention relates to the field of mine filling body testing devices, and provides a molding device used for preparing mine milltailings filling check blocks and a check block preparation method. The molding device comprises a box-shaped frame, an isolation baffle, a water permeable bottom plate and a forming mold. The side walls of the box-shaped frame are detachable. The side walls of the box-shaped frame are provided with isolation baffle positioning grooves, and the bottom of the box-shaped frame is provided with bottom plate insertion groove holes and bottom plate positioning grooves. The isolation baffle is detachably connected with the box-shaped frame through the isolation baffle positioning grooves, and the bottom end of the isolation baffle is attached to the upper surface of the water permeable bottom plate. The water permeable bottom plate is detachably connected with the box-shaped frame through the bottom plate insertion groove holes and the bottom plate positioning grooves. According to the molding device, the man-made interference in the pouring process of filling slurry is reduced to the maximum extent, the regularity of the check blocks are improved, the testing method is simple and easy to be standardized, the precision of filling check block strength tests is effectively improved, and the molding device is suitable for manufacturing all kinds of mine filling check blocks, especially the preparation of high-requirement and standard check blocks with coarse aggregate slurry, high-concentration slurry, different dewatering conditions and the like.

The invention discloses a buckling induction support with pineapple type induction units at ends. The buckling induction support comprises constraint sections, energy dissipation sections and a support straight section, wherein the energy dissipation sections are arranged at two ends of the support straight section, each energy dissipation section comprises at least one oblique pineapple type induction unit arranged along the axial direction of the support, each oblique pineapple type induction unit is a spatial body is formed by m oblique pineapple type subunits sequentially arranged along an oblique direction, and the section of the spatial body is a spiral line; each oblique pineapple type subunit is a spatial body formed by folding six isosceles triangle boards in the same plane. The buckling induction support has the advantages that the buckling induction support keeps elasticity under a small seism effect; the buckling induction support enters a yield stage under a middle seism effect or a large seism effect, and the good hysteretic energy dissipation performance of the buckling induction support allows the buckling induction support to have the effect of a damper; compared with a traditional buckling restrained brace, the buckling induction support is capable of reducing the workload of on-site construction, capable of saving energy and environmentally friendly.

The invention discloses a buckling induction brace with a circumferential-direction trapezoidal induction unit at the end. The buckling induction brace comprises a restrained section and energy consumption sections and further comprises a brace straight section. The energy consumption sections are arranged at the two ends of the brace straight section. Each energy consumption section comprises at least one circumferential-direction trapezoidal induction unit in the axial direction of the buckling induction brace. According to the circumferential-direction trapezoidal induction unit, m circumferential-direction trapezoidal subunits are arranged in the circumferential direction sequentially to form a space body with the section of a polygon. Each circumferential-direction trapezoidal subunit is a space body formed by folding four isosceles-trapezoid plates located in the same plane in a two-to-two collineation mode. The buckling induction brace maintains elasticity under the action of a small earthquake and enters a yield stage under the action of a medium earthquake or a large earthquake, and the good hysteretic energy consumption performance of the buckling induction brace can also achieves an effect of a damper. Compared with a traditional buckling restrained brace, the buckling induction brace reduces the workload of site construction work, and energy conservation and environment protection are achieved.

The invention discloses a U-shaped steel-friction energy-dissipating node and an outer wall system for an assembled external wall panel, including an upper node, the upper node includes a first steel plate, the first steel plate is U-shaped, and the first steel plate includes Two opposite straight plates, the ends of the two straight plates are connected by arc-shaped plates, a second steel plate is connected between the tops of the two straight plates, and a third steel plate is arranged on the top of the second steel plate; a lower node is arranged above the first steel plate, and the second There is an I-shaped steel beam connected between the first steel plate and the lower node, the second steel plate has an oblong hole, the third steel plate has a first bolt hole, the lower flange of the I-shaped steel beam has a hole, and the first connecting piece passes through The overlong round hole, the first bolt hole and the hole connect the second steel plate, the third steel plate and the I-shaped steel beam.

The invention discloses a buckling induced brace provided with length-variable pineapple type induction units at the end parts. The brace comprises a restraint section and an energy dissipation section and further comprises a flat brace section, wherein the energy dissipation section comprises at least one length-variable pineapple type induction unit in the axis direction of the brace; each length-variable pineapple type induction unit is a space body which is formed by arranging m length-variable pineapple type subunits in the annular direction sequentially and has a section of a 2m-regular polygon, and each length-variable pineapple type subunit is a space body formed by folding six isosceles triangle boards in the same plane. With the adoption of the buckling induced brace provided with the length-variable pineapple type induction units at the end parts, the buckling induced brace keeps elasticity under the action of small earthquakes and enters a yield stage under the action of medium earthquakes or large earthquakes, and the buckling induced brace can realize the effect of a damper by the aid of good hysteretic and energy dissipation performance. Compared with a conventional buckling restrained brace, the buckling induced brace has the advantages that workload for site operation is reduced in the aspect of a manufacturing process and energy conservation and environmental protection are realized.

The invention relates to a construction method adopting grouting to stop water in bare rock of an underground cavern and belongs to the technical field of civil construction. The construction method comprises six steps of determining a grouting range for a water seepage area of the underground cavern; determining parameters of grouting holes in the grouting range of the underground cavern; pre-burying a water seepage drainage pipe and a return pipe; spraying concrete in the grouting range; performing grouting in the grouting range with a method; ending grouting according to a standard. According to the construction method adopting grouting to stop water in the bare rock of the underground cavern, construction of the grouting holes and pre-burying of the drainage pipe before spraying of the concrete are sufficiently used, slide waste of the sprayed concrete material is reduced, combination of the sprayed concrete material with rock surface is increased, grouting is performed after concrete spraying according to the grouting ideas of grouting outer-ring holes firstly and then grouting inner-ring holes, grouting seepage-free holes firstly, then grouting small-seepage holes and finally grouting large-seepage holes, water seepage in the cavern is prevented effectively, repeated grouting to stop water is avoided, time is saved, and the construction progress is accelerated.

The invention discloses a bending induction support with two-way spiral type induction units at the ends. The bending induction support comprises restraining sections, energy consumption sections and a support straight section; the energy consumption sections are installed at the two ends of the support straight section, and each energy consumption section is composed of one or more two-way spiral type induction units in the axial direction of the support; each two-way spiral type induction unit is a space body with the cross section being a regular m-polygon, and the space body is formed by arranging m two-way spiral type induction subunits in the circumferential direction in sequence; each two-way spiral type induction subunit is a space body formed by folding four triangle plates in a two-two collineation mode. According to the bending induction support, under the effect of small earthquakes, the bending induction support keeps elasticity; under the effect of middle earthquakes or large earthquakes, the bending induction support enters a yield stage, and hysteric energy performance of the casing pipe bending induction support can have the effect of a damper; and compared with a traditional bending restraining support, the bending induction support reduces the working amount of in-place construction, saves energy and protects the environment.

The invention discloses a buckling control support with diamond type energy dissipation units at the ends. The buckling control support is characterized by being composed of end restraint sections, energy dissipation sections and a straight supporting section, wherein the two ends of the buckling control support are connected with beam and column members or joints into a whole through high-strength bolts to achieve the purpose of improving the lateral stiffness of the members. The buckling control support with the diamond type energy dissipation units at the ends maintains resilience under the action of a small earthquake and enters a yield stage under the action of a medium earthquake or a major earthquake, and the effect of a damper can be achieved due to the good hystersis energy dissipation performance of the buckling control support. Compared with a traditional buckling control support, the procedures of adding a sleeve outside a core energy dissipation member, performing grouting and the like in the traditional manufacturing process are omitted in the manufacturing technology, and manufacturing is convenient; the support can be prefabricated in a factory, the member quality is guaranteed, the workload of site construction operation is reduced, and energy conservation and environment protection are achieved.