47results about How to "Reduce reinforcement ratio" patented technology

The invention discloses a basement bottom plate structure high in floating and cracking resistance and a design method thereof. The basement bottom plate structure is of an inverted-pyramid-shaped space structure formed by subsidence of the position, between two adjacent columns, of a bottom plate. The design method of the basement bottom plate structure comprises the steps of determination of thedistance between every two adjacent columns of a building, determination of the subsidence height of the position, between the adjacent columns, of the bottom plate, determination of the subsidence form of the position, between the adjacent columns, of the bottom plate, determination of integral basement bottom plate layout, building of a basement bottom plate structure model, calculating of theinternal force of the basement bottom plate structure, reinforcing and structure chart drawing of the basement bottom plate structure, construction of the basement bottom plate, and the like. The basement bottom plate structure can bear large groundwater pressure and has high cracking resistance, permeation resistance and floating resistance. According to the design method of the basement bottom plate structure, the basement bottom plate structure high in floating and cracking resistance meeting the actual requirements can be designed according to different application projects, and the stepsare simple and high in operability.

A method for constructing a large-diameter reinforced concrete cast-in-place pile supporting stand column comprises the steps that (1) prefabrication is carried out, wherein a steel reinforcement cage is prefabricated according to the requirement of pile body reinforcing bars; (2) construction is carried out, wherein a formed hole is constructed on the field ground to the elevation of a bearing stratum on the bottom of a designed pile, then, the prefabricated steel reinforcement cage is hoisted in, and pile core concrete is poured; (3) connection is carried out, wherein at the connection position of a cast-in-place pile and an initial layer concrete support, the pile head of the cast-in-place pile is beat away, longitudinal bars of the cast-in-place pile are extended into the supporting steel reinforcement cage with the extending depth 30 times the diameter of the steel bars, supporting concrete are poured, and the cast-in-place pile and the initial layer support are connected together; (4) waterproof operation is carried out, wherein at the connecting position of the cast-in-place pile stand column and a bottom plate of a basement, a protection layer is beat off, an upper expansion water stopping strap and a lower expansion water stopping strap are arranged along the periphery of the cast-in-place pile, the cast-in-place pile stand column is integrally cast in the bottom plate of the basement, and the upper portion cast-in-place pile stand column is removed after the basement structure is completed. The method for constructing the large-diameter reinforced concrete cast-in-place pile supporting stand column solves the problem that a conventional steel latticework stand column is insufficient in bearing force, poor in section bending resistance and torsion resistance capacity and prone to damage by collision of machines to cause instability of a supporting system.

The invention relates to a light-heavy segmental lining combined structure of a TBM tunnel and a design method thereof. The light-heavy segmental lining combined structure comprises tunnel lining segments, and is characterized in that the lining segments in at least one tunnel section are arranged as the following structure that in the lining segments on the same ring, the reinforcement ratios of the segments in different position of the ring direction of the tunnel are not completely identical. In the lining segments on the same ring, the segments in the different positions of the ring direction of the tunnel have different reinforcement ratios, the structure breaks through the technical prejudice that the reinforcement ratios of the lining segments on the same ring must be consistent in the industry, and the reinforcement ratios of the corresponding segments in different positions can be reasonably distributed according to ground stress conditions, so that the pertinence of a support structure is higher, and the reinforcement ratio of a small-stress portion is reduced on the premise of guaranteeing structure stability. By means of the structural design, the construction cost is greatly reduced, unnecessary waste of reinforcements is avoided, and remarkable social and economic benefits are achieved.

The invention relates to a novel energy dissipation and shock absorption inter-tower connection structure of a framing tower-connected cable-stayed bridge. The structure comprises bridge tower bearing platforms, bridge tower columns are fixed to the bridge tower bearing platforms, the bridge tower columns are divided into upper tower columns and lower tower columns through bridge tower cross beams arranged on the bridge tower columns, and the bottom ends of two bridge towers are connected through a combined structure bearing platform straining beam between the bridge tower bearing platforms; inter-tower steel box inclined struts are arranged between tower limbs of the lower tower columns, so that the two bridge towers form local connection; and steel corbels are installed on the tower columns at the positions of the bridge tower cross beams, and dampers are installed between the two bridge towers through the steel corbels. According to the framing tower connecting structure form provided by the invention, on the basis of not influencing the construction period of the bridge tower and not increasing the construction difficulty, the transverse bridge direction earthquake response of the bridge tower is greatly reduced, and the anti-seismic property, the safety and the economical efficiency of the bridge tower are greatly improved.

A disclosed bridge damping structure suitable for a pile group foundation comprises a pier, a bearing platform is fixedly poured at the bottom of the pier, and a pressure-bearing steel plate corresponding to a pile foundation at the bottom of the bearing platform is pre-buried in the bearing platform; an outer steel casing with a downward casing opening is fixedly arranged at the bottom end of the pressure-bearing steel plate; the bottom of the outer steel casing penetrates out of the bottom end of the bearing platform, and the top end of the pile foundation is covered with the outer steel casing; the top of the pile foundation is fixedly provided with an inner steel casing wrapping the pile foundation; and the inner steel casing is a cylinder body without a bottom face, and a radial gap is formed between the side wall of the inner steel casing and the side wall of the outer steel casing. According to the damping structure, rigid connection between the bearing platform and the pile foundation can be avoided, the damping effect is good, and the damping structure is suitable for the pile group foundation in the bridge.

The invention provides a frame structure system suitable for a high-intensity area. The frame structure system is a multi-layer building composed of columns, beams and plates. In the frame structure system, the parts where the interlayer displacement angle is maximum due to intensive stress are provided with shock-absorption and energy-dissipation components respectively, and the shock-absorptionand energy-dissipation components include viscous damping walls and buckling-restrained braces, wherein the buckling-restrained braces are arranged at the positions where the interlayer displacement angles are maximum or relatively large due to intensive stress on the first to third floors of the multi-layer building or in the walls nearby the positions, and the viscous damping walls are arrangedat the positions where the interlayer displacement angles are maximum or relatively large due to intensive stress on the third or higher floors of the multi-layer building or in the walls nearby the positions. According to the frame structure system, while a good shock-absorption and energy-dissipation effect is achieved in a large earthquake, a moderate earthquake and a small earthquake, the aimscan be achieved that the sizes of reinforced concrete frame beam columns in the frame structure system are obviously reduced, the total construction cost of building materials is low, and the earthquake-proof cost-performance ratio is high.

The invention discloses a bidirectional plate stressed longitudinal and transverse beam concrete superstructure of a level crossing bridge. The superstructure comprises an edge beam structure system, which defines a space; a longitudinal and transverse beam structure system arranged in the space defined by the edge beam structure system and comprises a plurality of longitudinal beam components which extend in the longitudinal direction and are arranged at intervals in the transverse direction and a plurality of transverse beam components which extend in the transverse direction and are arranged at intervals in the longitudinal direction, so that a net-shaped structure with a plurality of gaps is formed in the edge beam structure system; and a top plate structure system which comprises a plurality of top plates, wherein each top plate covers the corresponding gap. As an upper beam body structure of a permanent intersection bridge, the bidirectional plate stressed longitudinal and transverse beam concrete superstructure can be applied to a level crossing of a regular multi-direction intersection at the center of a road, so that the problem that vehicles and pedestrians in different directions have intersection conflicts at the urban intersection is effectively solved, and the condition of traffic jam is relieved.

The invention relates to a construction process for large-depth semi-reverse excavation and a steel pipe column inner supporting structure, and the construction process comprises the following steps: S1, horizontally arranging first profile steel between two adjacent steel pipe columns on one side of a foundation pit, and excavating a soil body, located below a negative second structural layer, on the side, after excavation is conducted to the bottom face, a negative second structure layer is poured upwards to obtain a first beam body; s2, second profile steel is horizontally arranged between every two adjacent steel pipe columns on the other side of the foundation pit, a soil body, located below the negative second structural layer, on the side is excavated, and after excavation is conducted to the bottom face, the negative second structural layer is poured upwards to obtain a second beam body; and S3, third profile steel is horizontally arranged between every two adjacent steel pipe columns in the middle of the foundation pit, the soil body, located below the negative second structural layer, of the side is excavated, and after excavation is conducted to the bottom face, the negative second structural layer is poured upwards to obtain a third beam body. According to the technical scheme, the construction efficiency is greatly improved, the construction period is shortened, the utilization rate of the temporary supporting structure is improved, and waste of engineering materials is reduced.

The present invention provides: a reinforcing material for preventing punching shear, whereby punching shear is prevented by constituting a conical or semi-spherical reinforcing material, of which the cross-sectional size gradually increases downwards, such that the range of resistance to shearing forces is spread widely; and a construction method using same for areas where slabs join with pillars and where pillars join with spread foundations. The reinforcing material for preventing punching shear of the present invention comprises: an upper disk having a predetermined thickness; a skirt section which extends from the circumference of the upper disk, and widens from the top to the bottom as the cross sectional area gradually spreads in a zone of a fixed height; and a concrete charging chamber which opens towards the bottom such that the inside of the skirt section can be filled with concrete.