CN203938962U - The rubber concrete hollow pier with inside and outside constraint - Google Patents

Abstract

Rubber concrete hollow piers with internal and external constraints, including outer tubes, inner tubes, transverse diaphragms, vertical diaphragms, and concrete cover. The outer surface of the outer tube is distributed with shear studs for increasing the adhesion between the concrete cover , the concrete protective layer is coated on the outer wall of the outer tube; the inner tube is coaxially arranged inside the outer tube; a plurality of diaphragms with central holes are arranged between the outer tube and the inner tube along the axial direction , and the inner edge of the diaphragm is fixed to the outer wall of the inner pipe, and the outer edge is connected to the inner wall of the outer pipe to form a cavity for containing rubber concrete; there are multiple vertical partitions in the cavity, and two vertical partitions of each vertical partition The sides of the bars are respectively fixed to the outer wall of the inner tube and the inner wall of the outer tube. The beneficial effects of the utility model are: the effective boundary condition of the filled rubber concrete under three-way compression, the bearing capacity is improved, the shock absorption effect is obvious, the section size of the bridge pier is effectively reduced, the disassembly and assembly are simple, the construction difficulty is reduced, and the template material is saved. Resource-saving, environmentally friendly.

Description

Rubber Concrete Hollow Pier with Internal and External Constraints

technical field

The utility model relates to a rubber concrete hollow pier with internal and external constraints.

Background technique

Concrete hollow pier refers to a reinforced concrete pier with a hollow interior, which is an optimized form of pier cross-section for light and economical substructure. It has the characteristics of small cross-sectional area, large cross-sectional resistance moment, light weight, good structural rigidity and bearing capacity. It is widely used in the field of roads and railways, and is mostly used for high bridge piers. Compared with the gravity-type solid bridge piers, the hollow bridge piers can generally reduce the amount of concrete by 40% to 60%.

In the construction of roads and railways in mountainous areas of our country, due to the great changes in the terrain, high bridge piers account for a large proportion, and high bridge piers with a height of more than 50m are more common. In earthquake-prone areas, for such piers, ordinary reinforced concrete hollow piers tend to be rigid, prone to earthquake damage, and have poor shock absorption effects. The rubber concrete hollow pier, due to the organic combination of concrete and rubber particles, can effectively absorb earthquake energy, is not prone to earthquake damage, and has a good shock absorption effect.

Common reinforced concrete hollow piers have the following problems in application: 1) Due to the hollow interior of the cross-section, the concrete on the inner and outer walls of the pier loses restraint, and is in a state of internal unconstraint, with poor overall performance; 2) Under the action of earthquake loads, the reinforced concrete hollow The bridge piers are rigid and prone to shear failure; 3) The internal space of the hollow bridge piers is small, and it is extremely difficult to erect and dismantle the internal formwork during construction.

Contents of the invention

The utility model aims at the problem that the side wall concrete of the reinforced concrete hollow pier is unconstrained and prone to earthquake damage, and proposes a bridge that is not easy to damage, has high bearing capacity, good ductility, good durability, and good shock absorption performance, and is especially suitable for frequent earthquakes. Regional rubber concrete hollow piers with internal and external constraints.

The rubber concrete hollow pier with internal and external constraints described in the utility model is characterized in that it includes an outer tube, an inner tube, a transverse partition, a vertical partition, and a concrete protective layer, and the outer surface of the outer tube is distributed to increase Shear nails with adhesion between the concrete protective layer, the concrete protective layer is coated on the outer wall of the outer tube; the inner tube is coaxially arranged inside the outer tube; the A plurality of diaphragms with central holes are arranged between the outer tube and the inner tube in the axial direction, and the inner edge of the diaphragm is fixed to the outer wall of the inner tube, and the outer edge is connected to the inner wall of the outer tube to form a rubber A cavity of concrete; the cavity is provided with a plurality of vertical partitions, and the two sides of each vertical partition are respectively fixed to the outer wall of the inner pipe and the inner wall of the outer pipe.

The transverse diaphragms are arranged equidistantly along the vertical direction of the pier, and the transverse diaphragms are all in the horizontal direction.

The outer contour of the diaphragm is the same as that of the outer pipe, the contour of the central hole is the same as that of the inner pipe, and the outer edge of the diaphragm is welded close to the inner wall of the outer pipe, and the inner edge is welded close to the outer wall of the inner pipe.

The cross-section of the bridge pier and the cross-section of the outer steel pipe are any one of circular, rectangular, hexagonal, elliptical or round-ended.

The cross section of the pier, the outer tube and the inner tube are circular or rectangular, and the inner tube is circular or rectangular in cross section;

Alternatively, the cross-section of the bridge pier is circular, and the cross-sections of the outer tube and the inner tube are both circular;

Alternatively, the cross section of the bridge pier and the outer tube is hexagonal, and the cross section of the inner tube is circular;

Alternatively, the cross-section of the bridge pier is round-ended, and the cross-sections of the outer tube and the inner tube are round-ended;

Alternatively, the cross-section of the pier is elliptical, and the cross-sections of the outer tube and the inner tube are elliptical.

The distance between two adjacent diaphragms is less than or equal to the minimum dimension of the cross-sectional shape of the bridge pier, wherein the minimum dimension of the cross-sectional shape of the bridge pier is the diameter of the circular section or the short side of the rectangular section or the diameter of the oval section The minor axis length or the diameter of the circle end of a circle-end-shaped section or the diameter of the inscribed circle of a hexagonal section.

The outer pipe, inner pipe, transverse partition and vertical partition are all made of steel.

In the structure of the utility model, the inner and outer pipes are connected by vertical partitions. During the process of bearing the load, the stability of the overall skeleton is better. The bearing capacity and ductility have been greatly improved; the dispersed arrangement of the vertical diaphragms provides conditions for the formation of the overall skeleton of the inner and outer pipes, avoiding the sudden change in the section stiffness caused by the concentrated arrangement of a small number of vertical diaphragms, and preventing the intersecting area of the hollow section of the pier and the vertical diaphragms Concentrated damage under earthquake disasters; at the same time, through the effective absorption of earthquake energy by rubber concrete, it can provide effective protection for bridge piers under earthquake action, thus ensuring the overall safety of the bridge structure to a large extent.

The beneficial effects of the utility model are: (1) The inner steel pipe and the outer steel pipe dispersedly arranged by connecting the steel plates jointly constitute the lateral restraint of the concrete in the middle of the bridge pier, that is, the joint skeleton of the inner and outer steel pipes provides the inner and outer extrusion restraint, which establishes the middle rubber concrete Effective boundary conditions of three-dimensional compression; (2) The inner steel pipe and outer steel pipe dispersedly arranged by connecting steel plates provide strong support for the middle concrete of the rubber concrete hollow pier, which can effectively protect the middle rubber concrete from possible damage under earthquake loads At the same time, the energy-absorbing effect of rubber concrete is used to avoid the adverse effect of the hollow section under the earthquake load on the rubber concrete in the middle of the pier; (3) The inner and outer tubes work together with the rubber concrete in the middle to form a combined structure, and the bearing capacity can be improved. , the shock absorption effect is obvious, effectively reducing the cross-sectional size of the rubber concrete hollow pier; (4) the inner steel pipe provides a hollow internal formwork for the rubber concrete hollow pier, eliminating the erection and dismantling process of the ordinary internal formwork, and reducing the hollow structure of the section The difficulty of construction saves formwork materials.

Description of drawings

Figure 1 is a schematic cross-sectional view of a rubber concrete hollow pier with inner and outer steel pipes constrained by circular pier sections and inner and outer steel pipes;

Figure 2 is an analysis diagram of the working principle of a rubber concrete hollow pier with inner and outer steel tubes constrained by circular pier sections and inner and outer steel tubes (r1: the compressive stress of the outer steel tube wall to the wrapped concrete; σ _r2 : the inner steel tube wall to the wrapped concrete Compressive stress; σ _c : the concrete compressive stress balanced with the external force f _1y A _s and f _2y A _s of the steel cylinder at the section; f _2y A _s : the reactive tension on the inner steel cylinder wall when the wrapped concrete at the section is squeezed ; f _1y A _s : the reaction tension generated by the outer steel cylinder wall when the wrapped concrete at the section is squeezed);

Fig. 3 is a sectional view along line A-A in Fig. 2 .

Figures 4 to 9 are examples of cross-sections of piers and different cross-sections of inner and outer pipes, which are as follows:

Figure 4 is a schematic cross-sectional view of a rubber concrete hollow pier with inner and outer tubes constrained by circular pier sections and inner and outer tubes;

Fig. 5 is a schematic cross-sectional view of a rubber concrete hollow pier with inner and outer pipes constrained by rectangular pier sections and inner and outer steel pipes;

Fig. 6 is a cross-sectional schematic diagram of a rubber concrete hollow pier constrained by inner and outer tubes with a hexagonal cross-section and a hexagonal outer tube and a circular inner tube;

Fig. 7 is a schematic cross-sectional view of a rubber concrete hollow pier with inner and outer tubes constrained by a rectangular cross-section and a rectangular outer tube and a circular cross-section by the pier;

Figure 8 is a schematic cross-sectional view of a rubber concrete hollow pier with inner and outer tubes constrained by a pier section and inner and outer tubes with round ends;

Figure 9 is a schematic cross-sectional view of a rubber concrete hollow pier with inner and outer tubes constrained by oval pier sections and inner and outer steel pipes;

Detailed ways

Further illustrate the utility model below in conjunction with accompanying drawing

Referring to the attached picture:

Embodiment 1 The rubber concrete hollow pier with internal and external constraints described in the utility model includes an outer tube 1, an inner tube 2, a transverse partition 3, a vertical partition 4, and a concrete protective layer 5. The outer tube 1 of the outer tube 1 The surface is distributed with shear nails 11 for increasing the adhesion between the concrete protective layer 5, and the concrete protective layer 5 is coated on the outer wall of the outer tube 1; the inner tube 2 is coaxially arranged on the The inside of the outer tube 1; between the outer tube 1 and the inner tube 2, a plurality of diaphragms 3 with central holes are arranged along the axial direction, and the inner edge of the diaphragm 3 is connected to the inner tube 2 The outer wall is fixed, and the outer edge is connected with the inner wall of the outer tube 1 to form a cavity for accommodating the rubber concrete 6; multiple vertical partitions 4 are arranged in the cavity, and the two sides of each vertical partition 4 They are fixed to the outer wall of the inner tube 2 and the inner wall of the outer tube 1 respectively.

The transverse diaphragms 3 are arranged equidistantly along the vertical direction of the pier, and the transverse diaphragms 3 are all in the horizontal direction.

The outer contour of the diaphragm 3 is the same as that of the outer pipe 1, the contour of the central hole is the same as that of the inner pipe 2, and the outer edge of the diaphragm 3 is welded close to the inner wall of the outer pipe 1, and the inner edge is welded close to the outer wall of the inner pipe 2 .

The cross-sections of the piers, the outer pipe 1 and the inner pipe are any one of circular, rectangular, hexagonal, elliptical or round-ended shapes.

The cross-section of the pier and the cross-section of the outer tube 1 are circular or rectangular, and the cross-section of the inner tube 2 is circular or rectangular;

Alternatively, the cross-section of the bridge pier is circular, and the cross-sections of the outer tube 1 and the inner tube 2 are both circular;

Or, the cross section of the bridge pier and the cross section of the outer tube 1 is hexagonal, and the cross section of the inner tube 2 is circular;

Alternatively, the cross-section of the bridge pier is round-ended, and the cross-sections of the outer tube 1 and the inner tube 2 are round-ended;

Alternatively, the cross-section of the bridge pier is elliptical, and the cross-sections of the outer tube 1 and the inner tube 2 are elliptical.

The distance between two adjacent diaphragms 3 is less than or equal to the minimum dimension of the cross-sectional shape of the bridge pier, wherein the minimum dimension of the cross-sectional shape of the bridge pier is the diameter of the circular section or the short side of the rectangular section or the oval section or the diameter of the circle end of a circle-end-shaped section or the diameter of the inscribed circle of a hexagonal section.

The outer pipe, inner pipe, transverse partition and vertical partition are all made of steel.

Example 2 As shown in Figure 2, the outer side of the rubber concrete shock-absorbing hollow pier is subjected to the constraint force σ _r1 from the outside to the inside of the outer tube 1, and the inner side is subjected to the constraint force σ _r2 from the inner tube 2 from the inside to the outside, in a three-way bearing In the stress state, the mechanical properties of the side wall rubber concrete have undergone essential changes, and the strength and ductility have been greatly improved. The outer tube 1 and inner tube 2 are strengthened by the vertical diaphragm 4, providing a strong and effective support for the side wall of the hollow pier. The internal and external support, and the energy absorption of rubber concrete can effectively reduce the damage of the pier under the earthquake load.

Embodiment 3 The installation steps of the pier described in Embodiment 1 are: first process the inner pipe 2 and the outer pipe 1, and then install the transverse partition 3 and the vertical partition 4, and the two ends of the vertical partition 4 are closely attached to the outer pipe 1 The inner wall and the outer wall of the inner pipe 2 are welded. The thickness of the steel plate of the vertical partition 4 is the same as that of the inner and outer steel pipes, and its width should not be less than 50mm. , the minimum size of the pier section shape is the diameter of the circular section or the short side of the rectangular section or the minor axis length of the elliptical section or the round end diameter of the round end section or the inscribed circle diameter of the hexagonal section, the inner tube 2 After the welding and connection of the outer pipe 1, the transverse partition 3 and the vertical partition 4 are completed, they are hoisted to the construction site for installation. After the installation is completed, the shear nails 11 are welded on the outer wall of the outer pipe 1, and then the formwork is supported, concrete is poured, and the inner pipe 2 The interior is empty, that is, the manufacture of a rubber concrete hollow pier bounded by inner and outer steel pipes is completed.

The content described in the embodiments of this specification is only an enumeration of the realization forms of the utility model concept. The protection scope of the utility model should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the utility model also includes Equivalent technical means that those skilled in the art can think of according to the concept of the utility model.

Claims (5)

1. the rubber concrete hollow pier with inside and outside constraint, it is characterized in that: comprise outer tube, inner tube, diaphragm, vertical clapboard, concrete cover, the external surface of described outer tube distribute for increasing and concrete cover between the WELDING STUDS of adhesion, described concrete cover is coated on the outer wall of described outer tube; Described inner tube is coaxially arranged on the inside of described outer tube; Between described outer tube and inner tube, along axis direction, be provided with polylith with the diaphragm of centre bore, and the inward flange of diaphragm is fixed with outer wall of inner tube, outward flange is connected with outer tube wall, be formed for holding the cavity of rubber concrete, and described diaphragm is equidistantly arranged along bridge pier vertical direction, described diaphragm is all in horizontal direction; In described cavity, be provided with polylith vertical clapboard, and two sides of every vertical clapboard are fixed with outer wall of inner tube, outer tube wall respectively.

2. the rubber concrete hollow pier with inside and outside constraint as claimed in claim 1, it is characterized in that: the outline of described diaphragm is identical with outer tube, centre bore profile is identical with inner tube, and the outward flange of diaphragm is close to outer tube wall welding, inward flange is close to outer wall of inner tube welding.

3. the rubber concrete hollow pier with inside and outside constraint as claimed in claim 2, is characterized in that: the cross section of described bridge pier and the cross section of outer steel pipe are any one in circle, rectangle, hexagon, ellipse or nose circle shape.

4. the rubber concrete hollow pier with inside and outside constraint as claimed in claim 3, is characterized in that: the cross section of the cross section of described bridge pier, outer tube and inner tube is that circle or rectangle, inner tube are that cross section is circle or rectangle;

Or the cross section of described bridge pier is that the cross section of circle, outer tube and inner tube is circle;

Or the cross section of described bridge pier and the cross section of outer tube is that the cross section of hexagon, inner tube is circle;

Or the cross section of described bridge pier is that the cross section of nose circle shape, outer tube and inner tube is nose circle shape;

Or the cross section of described bridge pier is that the cross section of ellipse, outer tube and inner tube is ellipse.

5. the rubber concrete hollow pier with inside and outside constraint as claimed in claim 4, it is characterized in that: the distance between adjacent two diaphragms is less than or equal to the minimum dimension of bridge pier cross-sectional profile, wherein, the diameter that the minimum dimension of described bridge pier cross-sectional profile is circular cross-section or the minor face of square-section or the minor axis of elliptic cross-section length or the nose circle diameter of nose circle tee section or the inscribed circle diameter of hexagonal cross-section.