The invention relates to a metro station deep foundation pit combined type support construction method which comprises the following steps: 1, prefabricating a pile top beam and a support beams I; 2 carrying out support pile construction; 3, laying the pile top beam; 4, laying the support beam I; 5, excavating foundation pit soil mass; 6, laying a support beam II; 7, laying a slant water drain pipe; 8, adding a rib layer and a mortar layer; and 9, laying a wall surface water drain pipe. The metro station deep foundation pit combined type support construction method has the following benefits:the pile top beam and the support beams I are prefabricated according to the design requirements, so that the site construction efficiency is improved, and the project construction period is shortened; in addition, a displacement control body and an expansion filling body are arranged between the connected support beams I to apply jacking pressure to the support beams I and to reduce flexural deflection of the support beams I; and a rib plate and a connecting screw rod I are pre-arranged on the outer side of a support pile reinforcement cage, so that the pulling resistance of the connecting screw rod I is effectively promoted, the construction difficulty of a rear connecting piece is lowered, and the site construction efficiency is improved.

Metro station deep foundation pit combined type support construction method

PROBLEM TO BE SOLVED: To provide a column beam structure having a vibration damping structure, which has no disadvantage in cost when being compared to a conventional aseismic structure, which has less restriction in requirements for design and site when being compared to a conventional damping structure or seismic isolation structure, and which may absorb big energy from small deformation level so as to efficiently exert vibration damping effect.SOLUTION: In the column beam structure having a vibration damping structure, a plastic hinge part 15 is arranged on a beam end part and/or a column end part of a building, a vibration damping structure is realized by constructing the beam end part and/or the column end part in a manner where rigidity and/or yield resistance of the plastic hinge part is smaller than that of a member other than the plastic hinge part, and the plastic hinge part is configured in a manner where yield of the plastic hinge part starts from at least 1/150 in deformation angle of the building.SELECTED DRAWING: Figure 1

Column beam structure having vibration damping structure

The invention relates to a wrapping and hanging device with arch bridge suspenders convenient to replace. The wrapping and hanging device comprises a pair of wrapping and hanging mechanisms and a monitor mechanism. The monitor mechanism comprises a static strain collection instrument and a computer. The wrapping and hanging mechanisms comprise six supporting beams, four through jacks and two or more steel rods. A dial indicator arranged on each through jack and a strain gage pasted on each upper steel rod are connected with the static strain collection instrument through wires. An output port of the static strain collection instrument is communicated with the computer through a wire. In the use process, the two wrapping and hanging mechanisms are arranged at the positions, on the two sides of suspender components needing to be replaced, of an arch bridge; corresponding data are displayed by the computer through the static strain collection instrument; the control force of the two wrapping and hanging mechanisms is adjusted; the suspender components are replaced safely and conveniently. According to the wrapping and hanging device, operation is convenient, and difficulty and danger of high-altitude work are reduced; real-time monitor is facilitated, and control over force in the stretch-draw process is more accurate; data can verify one another in the replacement process through multivariable control, and the device is safer.

Wrapping and hanging device with arch bridge suspenders convenient to replace

The invention relates to a splicing and positioning method and device for a prefabricated stand column and a bearing platform and belongs to the technical field of bridge structure construction. According to the main technical scheme, the splicing and positioning method for the prefabricated stand column and the bearing platform is used for precisely positioning the prefabricated stand column on the bearing platform in the splicing process of the prefabricated stand column and the bearing platform. The splicing and positioning method comprises the following steps that the bottom elevation of the prefabricated stand column on the bearing platform is corrected; the horizontal position of the prefabricated stand column on the bearing platform is corrected through a positioning frame; and the perpendicularity of the prefabricated stand column is corrected through a perpendicularity adjusting device. The splicing and positioning device for the prefabricated stand column and the bearing platform comprises a bottom elevation adjusting device used for correcting the bottom elevation of the prefabricated stand column, the positioning frame used for correcting the horizontal position of the prefabricated stand column, and the perpendicularity adjusting device used for correcting the perpendicularity of the prefabricated stand column. The splicing and positioning method and device are mainly used for precise positioning of the prefabricated stand column during on-site splicing, and the splicing precision between the prefabricated stand column and the bearing platform is improved.

Splicing and positioning method and device for prefabricated stand column and bearing platform

The invention discloses a method for improving energy dissipation capacity of an existing prefabricated bridge pier. The method for improving the energy dissipation capacity of the existing prefabricated bridge pier is characterized in that N energy dissipation units are adopted to form one set of complete energy dissipation device mounted on the existing prefabricated bridge pier, wherein N is larger than or equal to 2; the single energy dissipation unit consists of a steel sleeve component, an annular steel plate component, a viscous fluid damper and a matched connecting piece; the components are connected by using bolts, and the energy dissipation units are connected by using bolts to form a complete energy dissipation strengthening system; and by using sticky steel glue, the annular steel plates, the steel sleeves and a bridge pier structure are fixed. The method for improving the energy dissipation capacity of the existing prefabricated bridge pier is a simple and feasible strengthening method with an obvious effect for seismic strengthening of the existing prefabricated bridge pier; and in particular, the energy dissipation capacity of the existing prefabricated bridge pier under the action of an earthquake can be obviously improved.

Method for improving energy dissipation capacity of existing prefabricated bridge pier

PROBLEM TO BE SOLVED: To provide a reinforcing method for a reinforced concrete member which can be constructed easily, can reduce construction cost, prevents a generation of buckling or breaking in a buckling suppressing member.SOLUTION: A reinforcement cage comprised of axial reinforcements 17 and tie hoops 29 is assembled. An end of a screw node reinforcement 1 on the straight line side is inserted into a hole 5 of a steel plate 3 and the steel plate 3 is sandwiched between a nut 7 screwed through the screw node reinforcement 1 and a fixing nut 9, so as to assemble a buckling suppressing member 13. Next, the buckling suppressing member 13 in a state of being assembled is suspended in the reinforcement cage. The screw node reinforcements 1 are inserted between the tie hoops 19 of the reinforcement cage. Hook treatments 11 are hooked on the tie hoops 19. The steel plates 3 are positioned in the reinforcement cage to be fixed by optional means. Then, the nut 7 is finely adjusted and tightened so that a bend inner surface 27 of the hook treatment 11 of the screw node reinforcement 1 and the tie hoop 19 are in contact with each other. Furthermore, the fixing nut 9 is tightened to fix the screw node reinforcement 1 and the steel plate 3.

Reinforcing method for reinforced concrete member

PROBLEM TO BE SOLVED: To provide a damper structure with good installation operability, and a construction method thereforSOLUTION: A damper structure 10 comprises two divisions of a first rear-side restriction part 21 fixed to a horizontal beam (upper structure) 3, and a first front-side restriction part 31 disposed in front opposite to the first rear-side restriction part 21, and cooperating the first rear-side restriction part 21 to constitute an upper restriction member 12, which enables the parts, ie the first rear-side restriction part 21 and the first front-side restriction part 31 to be lifted individually, so that a lifting machine can be made compact and handleability of the upper restriction member 12 is improved As a result, installation operability of the damper structure 10 can be improved In the damper structure 10, a lower restriction member 13 has constitution similar to that of the upper restriction member 12, so that the constitution of the lower restriction member 13 can contribute to improvement in the installation operability of the damper structure 10

Damper structure and construction method therefor

PROBLEM TO BE SOLVED: To provide a subsurface structure skeleton construction method capable of improving construction efficiency when a skeleton is constructed in subsurface compartmentSOLUTION: A subsurface structure skeleton construction method according to this invention is used to construct box culvert (skeleton) 1 in a subsurface compartment 3 formed by drilling between a pair of earth retaining walls 4, 5 facing each other The method comprises: a wale installation process to install a pair of wales, which extend in a lateral direction perpendicular to a vertical direction along each earth retaining wall and face each other, in the subsurface compartment 3; and a short strut installation process to install a short strut 30 that connects the wales 20 each other The wale 20 has a precast part (first precast part) 21 formed of precast block The precast part 21 forms at least a part of the box culvert 1SELECTED DRAWING: Figure 2

Subsurface structure skeleton construction method

PROBLEM TO BE SOLVED: To provide a bridge vibration control structure capable of inexpensively improving aseismatic performance of a bridge.SOLUTION: A bridge vibration control structure 10 is to control vibration to swinging in two directions of a plane, by placing a vibration control device 20 of using a steel honeycomb damper 11 between a bridge pier 100 and a floor slab 200b. The vibration control device 20 is provided with a wire rod 122 between a pair of brackets 121 respectively provided on one end in the lateral direction of an upper joining part 111 and the other end in the lateral direction of a lower joining part 111, in both surfaces of the honeycomb damper 11, as a restoration mechanism for imparting restoring force to the honeycomb damper 11.

Bridge vibration control structure

PROBLEM TO BE SOLVED: To provide a plastic hinge structure of a concrete-based member, and the concrete-based member using the plastic hinge structure attaining the improvement of deforming performance and hysteresis damping characteristics of the concrete-based member in a civil engineering and building structure at a low cost. SOLUTION: The plastic hinge part 2 provided at the concrete-based member 1 of an RC member or a PC member is formed in a laminated structure A with rigid members 3 of plate shape and flexible members 4 of plate shape alternately arranged in the axial direction of the concrete-based member 1, and axial steel members 5 embedded in the concrete-based member 1 are inserted through the laminated structure A of the rigid members 3 and flexible members 4 to form an unbond section B in the plastic hinge part 2 and its vicinity. The rigid members 3 are provided with insertion holes 6 of the axial steel members to restrain the buckling deformation of the axial steel members 5 to thereby prevent buckling, and a shear deformation preventing member 7 for restraining the shear deformation of the laminated structure A of the rigid members 3 and flexible members 4 is provided in the laminated structure A. COPYRIGHT: (C)2010,JPO&INPIT

Plastic hinge structure of concrete-based member, and concrete-based member

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