149results about How to "Reduce reinforcement" patented technology

Disclosed is a resettable roll-in type swinging seismic-isolation pier stud with flanges. The resettable roll-in swinging seismic-isolation pier stud is of a resettable seismic-isolation structure. The seismic-isolation pier stud comprises a main beam, piers, bearing platforms, semi-protruding spherical pier bottoms, pier flanges, rubber spacers, hollowed semispherical bearing platform tops, shape memory alloy shear bolts and oblique-section stoppers. The fixed connection of the piers and the bearing platforms is changed into swingable hinge connection. The spherical pier bottoms of the piers are embedded in the hollowed hemispheres of the bearing platform tops. The pier flanges are arranged on two sides of the upper portions of the spherical pier bottoms and are in anchorage connection with the bearing platforms via the shape memory alloy shear bolts. The rubber spacers are arranged between the semi-protruding spherical pier bottoms and the hollowed semispherical tops and between the bearing platforms and the pier flanges as well as between the sides of the pier flanges and the bearing platform stoppers. The pier stud is separated from the foundation, and seismic energy can be filtered by swinging, so that the piers and the foundation are protected. The resettable roll-in type swinging seismic-isolation pier stud has excellent social and economic benefits and worthy of popularization and application.

The invention relates to a method for processing tunnel collapse caused by shallow-buried excavation. The method comprises the first step of clearing soil bodies at the collapse part to a primary excavation line, the second step of carrying out secondary excavation according to the borderline of a secondary excavation line, constructing arch foot channel steel underboardings and upper half primary supports and then backfilling a vault to a soil body backfilling line, the third step of carrying out inside-tunnel construction by adopting the benching stepping method, the fourth step of constructing lower half primary supports and closing the lower half primary supports into rings by adopting the alternative bay method, and the fifth step of carrying out secondary lining construction on inverted arches at the bottom of a tunnel and then carrying out secondary lining construction on the upper portion of the tunnel by adopting lining trolleys. Through the combination of design construction and construction steps of the design construction, the method for processing the tunnel collapse caused by the shallow-buried excavation is completed. Therefore, the good effects that engineering investments are saved, and the construction period of the tunnel and safety in construction are guaranteed are achieved.

The invention provides a shield tunnel construction ground settlement control method, which includes the stages of construction preparation, trial excavation, formal excavation and shield tail leakage. The method particularly includes: using an initially tunneling section of front 100m as a trial tunneling section, dividing the trial put section of 100m into three sections, establishing control measures for tunneling for the third section, control for ground settlement and tunnel axes, lining installation quality and the like, and basically mastering construction parameters including tunneling speed, the volume of excavated earth of each turn, the water injection rate of each turn, shield deviation rectifying amplitude, synchronous grouting amount and slurry quality; and determining a shield tunneling axis according to the construction parameters measured at the construction preparation stage, and performing formal excavation according to the shield tunneling axis. By the aid of the construction technique, a reinforcing and moving range can be narrowed to the minimum extent, shield construction is performed at a uniform speed in a balanced manner, disturbance of shield tunneling change to soil is decreased, the overall construction cost of a project is reduced, and the requirement of ground settlement control is met.

The invention discloses soft soil foundation new construction post pile pressing technology and a construction method thereof. The technology is characterized in that: an anchor rod is embedded and a pressing plate reaction frame is fixed in a foundation under construction, by using the self weight of a building under construction, the prefabricated pile sections are pressed into the soil section by section in a foundation reserved or dug pile pressing hole by anchor static pressure pile technology, and the pile foundation is fixedly connected with the foundation. Therefore, the aims of improving the bearing capacity of foundation soil and controlling the building subsidence are fulfilled. The construction method comprises the following steps of: measuring and placing an axis and a pile; reserving the pile pressing hole; embedding the anchor rod; and pressing and sealing the pile. The technology and the construction method have the advantages of simple and convenient construction, environmental protection, energy conservation, high speed and high efficiency, and are particularly applied to the foundation engineering in which a natural foundation cannot be directly adopted or a pile foundation cannot be constructed in order.

The invention relates to a seamless tunnel structure adopting ECC concrete post-cast strips and a construction method of the seamless tunnel structure, and belongs to the technical field of tunnel construction. Tunnel secondary linings are constructed in a segmented mode, and one post-cast strip is reserved between every two segments of secondary linings. The temperature stress and concrete shrinkage stress of secondary lining concrete cast in advance are reduced through the post-cast strips, reinforcing bars are reduced in the post-cast strips, deformation is induced to be generated on the post-cast strips, ECC concrete is used for casting the post-cast strips, concrete cracks generated by differential settlement and loads are reduced through the ultrahigh toughness and self-healing capacity of the ECC concrete, and the super-long seamless tunnel structure is achieved. The ECC concrete is adopted for casting the post-cast strips, the width of the concrete can be effectively controlled, cracks generate din the tunnel operation process are avoided, and then the cracking and water leakage problem of a tunnel is fundamentally solved.

The invention discloses a high-damping reinforcing rubber sheet and a preparation method of the high-damping reinforcing rubber sheet. The rubber sheet is formed by compounding a bonding layer and a fiberglass reinforcing layer, wherein the bonding layer is prepared from the following raw materials in terms of mass percent: 10 percent to 15 percent of flexible epoxy resin, 5 percent to 8 percent of liquid epoxy resin, 10 percent to 30 percent of nonpolar rubber, 0.5 percent to 2 percent of curing agent, 2 percent to 6 percent of rubber auxiliary and 50 percent to 65 percent of functional filler. The preparation method comprises the following steps of firstly mixing the nonpolar rubber in a kneading machine for 5 to 10 min; then adding the rest raw materials into the kneading machine, and mixing for 15 to 30 min so as to obtain a bonding layer matrix composition; putting the bonding layer matrix composition into a rubber extruder for extruding the composition into a rubber sheet with a thickness of 2.0 to 2.5 mm; coating the rubber sheet with the fiberglass reinforcing layer, and pressing the rubber sheet 4 to 5 times in a reciprocating manner through a roller so as to obtain the high-damping reinforcing rubber sheet. The high-damping reinforcing rubber sheet has the advantages that damping is combined with reinforcement, so that the effects of high strength, good construction effect, low density, light weight, obvious reinforcement effect, high damping coefficient and strong ageing resistance are achieved, the weight of an automobile body can be reduced, the vibration and noise in an automobile can be reduced while the automobile body is reinforced, and the riding comfortableness is improved.

The invention relates to an anchor rod retaining wall combined with a main structure. The bottom of the retaining wall is connected with the main structure. An anti-shock seam is arranged between a retaining wall body and the main structure, and an anchor rod is arranged at the upper end of the retaining wall. The anchor rod is arranged on the upper portion of the retaining wall for resisting the pressure of the soil side, and the bending moment and shear force at the root of the retaining wall can be effectively reduced; and the bottom of the retaining wall is connected with a floor or a roof of a basement of a main building, and the overall stiffness of the basement of the main building is fully used for preventing the retaining wall from sliding. After foundation trench soil backfilling, the soil body generates the soil pressure acting on the retaining wall, at the moment the soil anchor rod can provide tension against the soil pressure, the bending moment of the wall body is reduced, accordingly the purposes that the thickness of the wall body is reduced, the consumption of rebars of the wall body is lowered, and the bottom crack width and the top horizontal displacement of the wall body are controlled are achieved, and the anchor rod retaining wall can be widely applied to structural engineering of retaining walls with the high wall bodies, such as high slope retaining walls next to sunken plazas and slope buildings.

The invention provides a deep foundation pit reinforced concrete supporting pile. One side of a web is connected with a flange I, a thickened section is arranged at one end of the web, a connecting and fixing part is arranged on the thickened section, and a steel strand is internally and vertically buried on the other side of the web. The manufacturing and the installing methods of the deep foundation pit reinforced concrete supporting pile include the steps as follows: a combined steel reinforcement cage composed of a web-shaped cage body part, a flange I-shaped cage body part and a thickened section cage body part arranged at one end part of the web-shaped cage body part is formed, the web-shaped cage body part is vertically provided with the steel strand on one side, and the thickened section cage body part is provided with the connecting and fixing part. A combined form composed of a monolithic moving side form and a fixed bottom form is adopted, and the deep foundation pit reinforced concrete supporting pile with the web and the flange I is made through pouring concrete after the combined steel reinforcement cage is positioned into the combined form; a connecting plate with two ends opened with through holes is made; a pile driver is used for pressing the first pile into the ground in a way that the thickened section faces upwards, when the top end is close to the ground, the second pile is abutted with the first pile through the connecting plate in a manner that the thickened section faces downwards and the flange I faces upwards, so as to press the second pile into the ground.

The invention discloses a method for restoring vegetation on high and steep slopes by the aid of coiled plant materials. The method includes operation steps of 1), cleaning slope surfaces; 2), constructing anchor rods; 3), hanging nets; 4), laying the coiled plant materials; 5), secondarily hanging nets; 6), fixing the nets and the coiled plant materials; 7), watering and maintaining the slope surfaces. The method has the advantages that the stability of substrates on the slope surfaces can be effectively maintained, the substrates are high in erosion resistance, construction processes are simple, the vegetation can be managed and maintained easily and conveniently in later periods, the slope surfaces can be effectively closed, and weathering and peeling of the slope surfaces can be prevented.

The invention provides an explosion method of an open-cut tunnel segment. The explosion method includes dividing rock mass of the open-cut tunnel segment to be tunneled into a plurality of steps from the top down for construction in layers and segments; comprehensively employing the spaced-loading segmental millisecond-delay blasting technique and the guide hollow hole-based contour smooth blasting technique. In this way, vibration damage, caused by oversize vibration, never occurs to near buildings during blasting of the tunnel shallow segment; tunneling efficiency of the rock mass of the open-cut tunnel segment is increased; cost spent on reinforcing and maintenance of the near buildings and temporary slopes is lowered; and engineering is implemented safely and smoothly.

The invention discloses an organic-inorganic composite water plugging reinforcement material and a preparation method thereof. The material consists of a component A and a component B, wherein the component A comprises the following ingredients by weight percent: 97-99% of water glass, 0.5-1.5% of a chain extension cross-linking agent, 0.2-0.6% of an organo-metallic catalyst, and 0.3-0.9% of an amine catalyst; the component B comprises the following ingredients by weight percent: 65-75% of crude MDI, 0-8% of PPG (polypropylene glycol)-2000, 2-10% of polyether triol 330N, 14-23% of a diluent and 1-2% of a foam stabilizer; the mass ratio of the component A to the component B is 1:(0.7-1.2). The preparation method comprises the following steps: mixing the ingredients of the component B according to the weight percent, leaving the mixture to stand for 12 hours, adding the component A, and uniformly stirring, so as to obtain the water plugging reinforcement material which is high in strength, good in environment friendliness and durability, non-flammable, and low in cost. According to the invention, the limitation problem that a polyurethane water plugging material can be used for reinforcement or plugging of a small amount of leakage water only.

The invention relates to a connection mode of a pier and a bearing platform through additional mild steel dampers, and belongs to the field of bridge engineering. According to the connection mode, mainly a reinforced concrete pier section, a concrete-filled steel tube pier section and additional mild steel dampers are arranged, wherein the section of a concrete-filled steel tube is a reduced scale section, and the vertical bearing capacity of the concrete-filled steel tube section with the reduced scale section is not lower than that of the reinforced concrete section; the additional mild steel dampers are arranged between the top of the bearing platform and the bottom of the reinforced concrete section. Under the effect of earthquakes, the plasticity deformation of the pier is focused on the concrete-filled steel tube section, so that a plastic hinge release pier bottom bending moment is formed; besides, the reinforced concrete section swings around a hinge to stimulate the mild steel dampers to resist earthquake force and dissipate earthquake energy. The energy consumption characteristics of the mild steel dampers can have protective effects on the concrete-filled steel tube section, through reasonable design, the concrete-filled steel tube section can be used only with slight repair and maintenance after the earthquakes, the damage of the main structure of a bridge is small, the normal service of the bridge is not influenced, and the damaged mild steel dampers are convenient to exchange.

The invention discloses a shear wall-truss hybrid type lateral resisting structure system. An oblique connecting rod is arranged between two shear walls, and the connecting rod, a connecting beam and the shear walls form the shear wall-truss hybrid structure system to resist the horizontal loading effect. The lateral rigidity of the hybrid system is far higher than that of single effect of the shear wall; the invention improves the stress performance of the shear wall, obviously improves the ductility and energy consumption performance of the structure, greatly improves the destroy resistance of a building, avoids collapse of the building under earthquake effect, and effectively protects safety of people lives and properties.

The invention relates to a composite material bridge surface ancillary facility of a rail way prestress concrete box girder. Cable troughs are formed in the upper surfaces of the two sides of the box girder, walking plates are installed at the tops of the cable troughs, and curtain plates are installed on the outer side of the cable troughs; and handrails or sound barriers are installed on the edges of the two sides of the box girder. Main components of the composite material bridge surface ancillary facility are made of fibre reinforcing composite materials, the materials are light in mass and high in intensity, the secondary permanent load of a bridge girder is little, the geometry size of the bridge girder can be reduced, and distributed bars and prestress bars of the bridge girder are reduced, so that the total weight of the bridge girder is reduced.

The invention discloses a processing method of a multi-layer thermoplasticity plastic pipe. The processing method is characterized in that at least two layers of thermoplasticity plastic layer co-extrusion mutual melting technologies are adopted, a main extruding machine and at least one auxiliary extruding machine are utilized to extrude the plastic, the plastic is extruded into a pipe billet in a multi-layer co-extrusion mould, a plastic pipe rounding stress relief device is used for cutting the diameter rounding and axial stress after vacuum sizing, and the plastic is further cooled and formed. The processing method provided by the invention has the characteristics that the manufacture difficulty is low, the stability is good, the structure is simple, the manufacturing cost is low, the property grade of a product is improved and the like.

An airbag device includes an airbag, an airbag cover which covers the airbag, and a holder which holds the airbag and the airbag cover. The airbag cover includes a door portion which is pushed by the inflating airbag and opened with a hinge portion around a rotation center. A functional component is provided on the door portion and connected to and held by a deformable holding member. The holding member includes a distal side connecting portion connected to the functional component, a proximal side connecting portion connected to a part which can ensure an attachment strength, and a deformation portion which is provided between the distal and proximal side connecting portions and deformed to maintain a connection and holding state of the distal side connecting portion with the functional component and reduce a centrifugal force of the functional component acting on the hinge portion when the airbag is inflated.

The invention provides a method for combined supporting of an anchor rod (cable) of a foundation pit pile. The method is as follows: the anchor rod (cable) is arranged against the earth-retaining side in a support pile with legs on the side wall of the foundation pit, the anchor rod (cable) is arranged in the earth-retaining side behind the support pile, and the anchor rod (cable) along the side wall of the foundation pit is connected with a top beam by an anchor device, wherein the anchoring section of the anchor rod (cable) is driven into a rock layer with relatively higher shearing strength so as to realize combined supporting of the anchor rod (cable). The method can completely meet the supporting requirement of the side slopes of the foundation pit, is safe and reliable, saves great capital for project cost, and shortens the construction period.

The invention discloses a simply supported prefabricated integrally-cast superposed bridge. The prefabricated integrally-cast superposed bridge comprises inverted T-shaped prestressed prefabricated beam parts, cast-in-situ parts and horizontal baffles, and is characterized in that each cast-in-situ part comprises a cast-in-situ plate and a cast-in-situ superposed part at the upper part of the beam part; pretensioned prestressed steel strands are embedded in the upper parts of a web plate and a lower flange of each inverted T-shaped prestressed prefabricated beam part; the horizontal baffles adopt prefabricated plates, and are longitudinally arranged at intervals between the web plates of the adjacent prefabricated beam parts at the two ends of each beam part and positioned above the flanges of the prefabricated beam parts; and the inverted T-shaped prestressed prefabricated beam parts adopt manufacturing moulds commonly used with buildings, and mould plates are good in commonality, convenient to mount and dismount, high in working efficiency and low in amortized cost.

The present invention is one specific reinforced concrete frame structure, relates to reinforcing bar concrete frame in civil engineering, and aims at reducing cross section size of beam and column and decreasing reinforcing bars in reinforced concrete frame structure. The frame beam has cross section pushing area of high strength or ultra high strength concrete and cross section pulling area of common concrete; the frame column has core column of high strength or ultra high strength concrete; and frame node is made of high strength or ultra high strength concrete. The present invention has reduced beam and column cross section size, decreased reinforcing bars, convenient construction, high engineering quality and improvement in the use function of building or structure.