阅读说明：本技术 一种钢管堆石橡胶混凝土结构及其施工方法 (Steel pipe rockfill rubber concrete structure and construction method thereof ) 是由 邱流潮 田雷 杨永森 李敬军 于 2019-09-26 设计创作，主要内容包括：本发明涉及建筑工程技术领域,提供了一种钢管堆石橡胶混凝土结构及其施工方法,该钢管堆石橡胶混凝土结构包括钢管,还包括石块与自密实橡胶混凝土；石块填充在钢管内,自密实橡胶混凝土填充在石块形成的缝隙之间。本发明提供的钢管堆石橡胶混凝土结构,以天然的石块作为主要填充物,并且采用流动性高、抗离析性能强的自密实橡胶混凝土用于辅助填补石块之间的缝隙,在保证整体结构强度的前提下,有效的降低了混凝土的消耗量、降低了施工成本；此外,自密实橡胶混凝土填充时,无需振捣,有利于简化施工工序,加快施工进度,并且自密实橡胶混凝土在凝固后具有良好的抗冲击、抗弯折、吸震减震等动力学性能。(The invention relates to the technical field of constructional engineering, and provides a steel pipe rockfill rubber concrete structure and a construction method thereof, wherein the steel pipe rockfill rubber concrete structure comprises a steel pipe, stones and self-compacting rubber concrete; the stone is filled in the steel pipe, and the self-compacting rubber concrete is filled between gaps formed by the stone. According to the steel pipe rockfill rubber concrete structure, natural stones are used as main fillers, self-compacting rubber concrete with high fluidity and strong segregation resistance is used for filling gaps among the stones in an auxiliary mode, and on the premise that the overall structural strength is guaranteed, the consumption of the concrete is effectively reduced, and the construction cost is reduced; in addition, when the self-compacting rubber concrete is filled, vibration is not needed, the construction process is simplified, the construction progress is accelerated, and the self-compacting rubber concrete has good dynamic performances such as impact resistance, bending resistance, shock absorption and shock absorption after solidification.)

1. A steel tube rockfill rubber concrete structure comprises a steel tube, and is characterized by also comprising stones and self-compacting rubber concrete;

the stone is filled in the steel pipe, and the self-compacting rubber concrete is filled between gaps formed by the stone.

2. The steel pipe rockfill rubber concrete structure according to claim 1, wherein the minimum particle size of the stone is greater than or equal to five times the maximum particle size of coarse aggregate in the self-compacting rubber concrete.

3. The steel pipe rockfill rubber concrete structure according to claim 1, wherein the stone has a particle size of 15 to 200 cm;

the maximum grain size of the coarse aggregate in the self-compacting rubber concrete is not more than 25 mm.

4. The steel pipe rockfill rubber concrete structure according to claim 1, wherein the slump of the self-compacting rubber concrete is not less than 255mm, the slump expansion is 550-700mm, and the outflow time of the V-shaped funnel is 7-25 s.

5. The steel pipe rockfill rubber concrete structure according to claim 1, wherein the cross-sectional shape of the steel pipe includes a circle, a rectangle, and a polygon.

6. A construction method of a steel pipe rockfill rubber concrete structure according to any one of claims 1 to 5, comprising:

s10, fixing the steel tube at the target position;

s20, filling stones with preset height into the steel pipe;

and S30, pouring self-compacting rubber concrete into the steel pipe, and filling gaps among the stones.

7. The method of constructing a steel pipe rockfill rubber concrete structure according to claim 6, wherein in step S20, the height of the lump of stone is 1-2m at a single filling.

8. The method for constructing a steel pipe rockfill rubber concrete structure according to claim 6, wherein in step S30, the height of the single pour of the self-compacting rubber concrete is 100-300mm from the top surface of the block.

9. The method as claimed in claim 6, wherein the height of the last stone is 300-500mm from the top of the steel pipe when the steel pipes are spliced.

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a steel pipe rockfill rubber concrete structure and a construction method thereof.

Background

The concrete-filled steel tube is a novel concrete-filled steel tube material formed by pouring concrete into a cavity of a steel tube. Concrete-filled steel tubes can be divided into round steel tube concrete, square steel tube concrete and polygonal steel tube concrete according to the difference of the cross-sectional shapes of the steel tubes, wherein the round steel tube concrete and the square steel tube concrete are most commonly used. Concrete-filled steel tubes have unique advantages over traditional concrete and reinforced concrete. The steel pipe concrete combines good bending resistance and elastoplasticity of the steel pipe with good compression resistance of the concrete, the compression resistance and the anti-deformation capability of the concrete core are further enhanced under the action of the hoop of the steel pipe, and if the waste tire is processed into aggregate to be doped into the concrete to form the rubber concrete, the pollution of the waste tire to the environment can be reduced, the high brittleness and low strain property of the hardened concrete can be improved, the density and elastic modulus of the concrete are reduced, the ductility, impermeability, freeze-thaw resistance and impact resistance of the concrete are improved, and the steel pipe rubber concrete structure has more excellent mechanical properties.

But to the great steel pipe rubber concrete structure of volume, the rubber concrete volume that needs is great, has increased construction cost, and simultaneously, the increase of cement demand volume inevitably leads to cement supply volume to increase, and the production of cement belongs to the high pollution trade, consumes cement in a large number, is unfavorable for green.

Disclosure of Invention

Technical problem to be solved

The invention provides a steel pipe rockfill rubber concrete structure and a construction method thereof, which aim to solve the technical problem that the rubber concrete consumption of the steel pipe rubber concrete structure in the prior art is large.

(II) technical scheme

In order to solve the technical problem, the embodiment of the invention provides a steel pipe rockfill rubber concrete structure, which comprises a steel pipe, a stone and self-compacting rubber concrete; the stone is filled in the steel pipe, and the self-compacting rubber concrete is filled between gaps formed by the stone.

Wherein the minimum particle size of the stone blocks is more than or equal to five times of the maximum particle size of the coarse aggregate in the self-compacting rubber concrete.

Wherein the particle size of the stone is 15-200 cm; the maximum grain size of the coarse aggregate in the self-compacting rubber concrete is not more than 25 mm.

Wherein, the slump of the self-compacting rubber concrete is not less than 255mm, the slump expansion degree is 550-700mm, and the outflow time of the V-shaped funnel is 7-25 s.

Wherein, the cross-sectional shape of steel pipe includes circular, rectangle and polygon.

The embodiment of the invention also provides a construction method of the steel pipe rockfill rubber concrete structure, which comprises the following steps: s10, fixing the steel tube at the target position; s20, filling stones with preset height into the steel pipe; and S30, pouring self-compacting rubber concrete into the steel pipe, and filling gaps among the stones.

Wherein, in step S20, the height of the single filling stone block is 1-2 m.

Wherein, in step S30, the height of the single-time pouring of the self-compacting rubber concrete is 100-300mm from the top surface of the stone.

Wherein, when a plurality of steel pipes are needed to be spliced, the height of the stone filled for the last time is 300-500mm away from the top of the steel pipe.

(III) advantageous effects

According to the steel pipe rockfill rubber concrete structure, natural stones are used as main fillers, self-compacting rubber concrete with good toughness, impact resistance, high fluidity and strong segregation resistance is used for filling gaps among the stones in an auxiliary mode, the consumption of the rubber concrete is effectively reduced on the premise that the overall structural strength is guaranteed, and the construction cost is reduced; in addition, the self-compacting rubber concrete fills the time slot without vibration, which is beneficial to simplifying the construction process and accelerating the construction progress, and the self-compacting rubber concrete has good dynamic performances of impact resistance, bending resistance, shock absorption and the like after being solidified; finally, the waste tire is processed into rubber aggregate which is added into the self-compacting concrete, so that the pollution of the waste tire to the ecological environment can be reduced, and the green development is realized.

Drawings

FIG. 1 is a schematic structural view of a single steel pipe in an embodiment of the steel pipe rockfill rubber concrete structure provided by the present invention;

FIG. 2 is a cross-sectional view of one embodiment of a steel pipe rockfill rubber concrete structure provided by the present invention;

FIG. 3 is a top view of one embodiment of a steel pipe rockfill rubber concrete structure provided by the present invention;

in the figure, 1-steel pipe; 2-stone blocks; 3-self-compacting rubber concrete.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, fig. 2 and fig. 3, the embodiment of the present invention provides a steel pipe rockfill rubber concrete structure, which includes a steel pipe 1, a stone block 2 and a self-compacting rubber concrete 3; the stone blocks 2 are filled in the steel pipes 1, and the self-compacting rubber concrete 3 is filled between gaps formed by the stone blocks 2.

Specifically, for example, the steel pipe 1 may be a steel pipe 1 having a circular cross section, in which case the diameter of the steel pipe 1 is larger than 1m, the side length of the steel pipe 1 is larger than 1m for a steel pipe 1 having a square cross section, and the distance between opposite sides of the steel pipe 1 is larger than 1m for a steel pipe 1 having a polygonal cross section; the particle size of stone 2 can be selected according to the actual size of steel pipe 1, prepares the self-compaction rubber concrete 3 of suitable aggregate particle size according to the particle size of selected stone 2 again simultaneously to ensure to pack the gap between stone 2 and between stone 2 and steel pipe 1.

According to the steel pipe rockfill rubber concrete structure, the natural stone blocks 2 are used as main fillers, and the self-compacting rubber concrete 3 which is good in ductility, strong in shock absorption and shock absorption performance, high in impact resistance, high in fluidity and strong in segregation resistance is used for assisting in filling gaps among the stone blocks 2, so that on the premise of ensuring the overall structural strength, the consumption of the self-compacting rubber concrete 3 is effectively reduced, and the construction cost is reduced; in addition, the self-compacting rubber concrete 3 fills the time slot, does not need to be vibrated, is beneficial to simplifying the construction process and accelerating the construction progress, and has good dynamic performances of impact resistance, bending resistance, shock absorption and the like after being solidified; finally, the waste tire is processed into rubber aggregate which is added into the self-compacting concrete, so that the pollution of the waste tire to the ecological environment can be reduced, and the green development is realized.

Further, the minimum particle size of the stone blocks 2 is greater than or equal to five times the maximum particle size of the coarse aggregates in the self-compacting rubber concrete 3.

Further, the particle size of the stone block 2 is 15-200 cm; the maximum grain size of the coarse aggregate in the self-compacting rubber concrete 3 is not more than 25 mm. Specifically, for example, the stone block 2 may have a grain size of 20cm, 50cm, 100cm, etc., and the corresponding coarse aggregate in the self-compacting rubber concrete 3 may have a maximum grain size of 5mm, 10mm, and 20mm, for obtaining an optimal caulking effect.

Further, the slump of the self-compacting rubber concrete 3 is not less than 255mm, the slump expansion is 550-700mm, and the outflow time of the V-shaped funnel is 7-25 s. Specifically, for example, the slump of the self-compacting rubber concrete 3 can be 260mm, the slump expansion can be 600mm, and the outflow time of the V-shaped funnel can be 15s, so that after the self-compacting rubber concrete 3 is poured, the self-compacting rubber concrete 3 naturally fills gaps downwards by gravity, vibration is not needed, the construction process is simplified, and the construction progress is accelerated; meanwhile, the self-compacting rubber concrete 3 can be ensured to have certain viscosity, so that the strength requirement can be met after the mixed stone 2 and the self-compacting rubber concrete 3 are solidified.

Further, the sectional shape of the steel pipe 1 includes a circle, a rectangle, and a polygon.

The embodiment of the invention also provides a construction method of the steel pipe rockfill rubber concrete structure, which comprises the following steps: s10, fixing the steel pipe 1 at the target position; s20, filling the stone blocks 2 with preset height into the steel pipe 1; and S30, pouring the self-compacting rubber concrete 3 into the steel pipe 1, and filling the gaps between the stones 2.

Specifically, for example, a steel pipe 1 with a proper pipe diameter and a proper pipe length is selected according to a construction environment and a construction requirement, the steel pipe 1 is vertically placed, the steel pipe 1 can be fixed in a pre-buried or welding mode, then stones 2 with a preset height, for example, stones 2 with a height of 1m, are added into the steel pipe 1, then self-compacting rubber concrete 3 is prepared and added into the steel pipe 1 after being inspected to be qualified, for example, the addition can be stopped when the self-compacting rubber concrete 3 is 200mm away from the top surface of the stones 2, the steps are repeated until the whole steel pipe 1 is filled, and if the steel pipe 1 needs to be lengthened, the stones 2 or the self-compacting rubber concrete 3 can be continuously added after splicing; if the self-compacting rubber concrete 3 is not required to be lengthened, the self-compacting rubber concrete can be completely solidified with the stone block 2; thereafter, the orientation of the steel pipe 1 can be adjusted according to the application and the application.

Further, in step S20, the height of the single fill stone block 2 is 1-2 m. For example, the height of the single filling can be 1m, 1.4m, 1.8m and the like, which is beneficial to completely fill the gap when the self-compacting rubber concrete 3 is filled, so as to improve the strength of the whole structure.

Further, in step S30, the height of the single pour of the self-compacting rubber concrete 3 is 300mm from the top surface 100 of the block 2. Specifically, for example, the height of the single-pouring self-compacting rubber concrete 3 may be 150mm, 200mm, 250mm, etc. from the top surface of the block 2, so as to facilitate the close combination between the self-compacting rubber concrete 3 poured next time and the self-compacting rubber concrete 3 poured last time, thereby preventing the occurrence of through cold gaps.

Further, when a plurality of steel pipes 1 are required to be spliced, the height of the stone block 2 filled for the last time is 300-500mm away from the top of the steel pipe 1. In particular, for example, the height of the last filled stone block 2 can be 350mm, 400mm and 450mm from the top of the steel tube 1, so arranged that, on the one hand, the steel tube 1 is extended for splicing, while still facilitating a better interface of the stone block 2 and the self-compacting rubber concrete 3 in the next section of steel tube 1 with the stone block 2 and the self-compacting rubber concrete 3 in the previous section of steel tube 1.

The above embodiment shows that the steel pipe rockfill rubber concrete structure and the construction method thereof provided by the invention have the following beneficial effects:

the invention uses natural stone blocks to replace partial rubber concrete, greatly reduces the consumption of the rubber concrete, is beneficial to reducing the discharge of hydration heat and carbon dioxide and reduces the economic cost.

2, the invention fills the gaps between the stones with the self-compacting rubber concrete which has high fluidity, strong segregation resistance and no vibration, thereby greatly simplifying the construction process and accelerating the construction speed.

3, the self-compacting rubber concrete has better ductility, impact resistance and shock absorption and damping effects after being solidified, thereby effectively improving the dynamic performance of the conventional steel pipe concrete structure.

4, the self-compacting rubber concrete formed by doping the waste tire rubber particles in the self-compacting concrete fills the gaps among the stones, so that the pollution and burden of the waste tire to the environment are effectively reduced, and the novel steel pipe rockfill rubber concrete structure has the characteristics of good integrity, excellent dynamic performance, energy conservation, environmental protection and the like, and has good engineering application prospect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.