CN109555269B - A kind of hollow sandwich steel tube concrete pouring body with tie bars and its construction method - Google Patents

Abstract

A hollow sandwich steel pipe concrete pouring body with tie bars and a construction method thereof, which includes concentric inner and outer steel pipes assembled and welded by a number of straight steel plate members. The two straight steel plate members constituting the outer steel pipe are welded with curved hooks. Concrete is poured into the hollow interlayer formed by two concentrically placed steel pipes. It also includes two-way tension stirrups built into the hollow interlayer. The tension stirrups are evenly arranged along the height direction of the steel pipe, and the longitudinal bars are made into the form of a steel cage. The construction method that combines welding and hook setting effectively connects the stirrup cage and the inner surface of the sandwich of the hollow sandwich steel pipe. The construction operation of the invention is simple and convenient, makes up for the shortcomings of insufficient restraint effect of the inner and outer steel pipes on the concrete in the hollow sandwich steel tube concrete pouring body, and the lack of restraint effect of the inner steel pipe on the concrete, improves the bearing capacity of the hollow sandwich steel tube concrete pouring body, and improves the structural performance of the hollow sandwich steel tube concrete pouring body. advanced optimization.

Description

A kind of hollow sandwich steel tube concrete pouring body with tie bars and its construction method

Technical field

The invention relates to the field of construction technology, and specifically relates to a hollow sandwich steel tube concrete pouring body with tie bars and a construction method thereof.

Background technique

Concrete-filled steel tubes are building components made by filling concrete in steel tubes. They have the excellent mechanical characteristics of steel and concrete. They have become an important part of civil engineering fields such as super high-rise buildings, long-span bridges, tunnels, deep wells, ocean platforms and transmission towers. Commonly used structural members.

Among them, the hollow sandwich steel tube concrete cast body is a new type of composite column formed by pouring plain concrete between the inner and outer layers of concentric steel tubes. In addition to the traditional steel tube concrete cast body, it has high compressive bearing capacity, good plasticity and toughness, and is easy to construct. In addition to the advantages of good fire resistance and cost saving, it also has the characteristics of light weight, high bending stiffness, good seismic performance, and convenient connection processing.

The inner and outer steel pipes of the hollow sandwich steel tube concrete cast body replace the steel bars in traditional reinforced concrete columns. The holes in the inner steel pipes can be used as vertical transportation channels for pipelines and the anchoring ends of bridge cables. It is suitable for super high-rise buildings and viaducts. Bridge piers, support columns of offshore platform structures, giant composite frame columns, transmission and transformation pole towers, large-size cast-in-place piles and civil engineering fields that may encounter freezing loads.

However, there are also some shortcomings in the actual application of hollow sandwich steel tube concrete pouring bodies. The hollow sandwich steel tube concrete pouring body has the defect that the inner and outer steel pipes do not restrain the concrete enough, especially the inner steel pipe; and as the hollowness increases, the bearing capacity of the hollow sandwich steel tube concrete pouring body will be significantly weakened.

Contents of the invention

The invention solves the deficiencies of the prior art and provides a hollow sandwich steel pipe concrete cast body with tie bars and a construction method thereof that is light in weight, has high bearing capacity, good ductility and is easy to construct. It combines the welding and joint processing of the hollow sandwich steel pipe. The advantages of simplicity and convenience and the effective tie of the tie bars to the steel pipe; by using the restraint method of the tie bars, the tie bars are made into the form of a steel cage, and the inner and outer square steel pipe walls are welded and tangent to form an effective The connection saves the amount of steel and reduces the difficulty of welding operations. It also enhances the restraining effect of the inner and outer steel pipes on the concrete in the hollow sandwich steel tube concrete cast body. The larger the diameter of the tie bar, the more obvious the enhancement effect.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A hollow sandwich steel pipe concrete pouring body with tie bars, including an inner steel pipe, an outer steel pipe coaxially installed outside the inner steel pipe, and concrete poured in the interlayer between the inner and outer steel pipes. The interlayer between the inner and outer steel pipes A steel cage is installed inside, and the inner and outer sides of the steel cage are fixed to the inner steel pipe and the outer steel pipe respectively. The opposite faces of the inner and outer steel pipes and the opposite faces of the outer steel pipe are fixedly connected through the steel cage.

Further, the steel cage is a two-way tension stirrup cage. The two-way tension stirrup cage includes a plurality of positioning longitudinal bars arranged along the height direction for positioning and two-way tension bars fixed on the positioning longitudinal bars and arranged transversely. stirrups, the two-way tension stirrups are arranged in multiple layers on the positioning longitudinal bar along the extension direction of the positioning longitudinal bar at a certain distance. The two ends of the two-way tension stirrups are respectively fixed on the opposite surfaces of the inner and outer steel pipes and On the opposite side of the outer steel pipe, the middle part of the two-way tension stirrups is fixed on the positioning longitudinal bar. The two-way tension stirrup cage is a development of the existing steel bar cage. The existing steel cage is based on the longitudinal bar stress. The method in which the main and stirrups are auxiliary has been developed into a method in which the two-way tension stirrups bear the main force and the longitudinal bars only play a positioning role. The two-way tension stirrups connected to the inner and outer steel pipes are used to transmit the stress to The inner and outer steel pipes use two-way tension stirrups and the inner and outer steel pipes as the main forces, thereby improving the bearing capacity and ductility of the steel tube concrete cast body.

Further, the hollow sandwich steel tube concrete pouring body with tie bars is a steel tube concrete column or a steel tube concrete wall.

Furthermore, the diameter of the two-way tension stirrups is larger than the diameter of the positioning longitudinal bars.

Furthermore, the two-way tension stirrups on the same layer are arranged at a horizontal spacing of 150 to 200 mm, and the two-way tension stirrups on adjacent layers are arranged at a longitudinal spacing of 100 mm.

Further, the outer steel pipe includes an ordinary steel plate member and a hook steel plate member. The hook steel plate member includes a steel plate member and a hook fixed on the inside of the steel plate member. The two-way tension stirrup cage is connected to the hook steel plate member. There are transverse steel bars arranged transversely corresponding to the positions of the hooks. The transverse steel bars are welded to the ends of the two-way tension stirrups. The two-way tension stirrups on the same layer and arranged in the same direction are connected into a whole. At least one piece of the The ordinary steel plate members are welded to the two-way tension stirrup cage, and the hook steel plate members are fixed on the transverse steel bars of the two-way tension stirrup cage through hooks. Adjacent ordinary steel plate members, adjacent Welding between hook steel plate components and adjacent ordinary steel plate components and hook steel plate components.

Furthermore, the preset installation position of the hook steel plate component on the two-way tension stirrup cage is the welding construction activity area. The welding construction activity area facilitates workers to perform welding activities on ordinary steel plate components and the two-way tension stirrup cage. , after the welding of the ordinary steel plate components is completed, the hook steel plate components are fixed on the transverse steel bars of the two-way tension stirrup cage through hooks, and the hook steel plate components are connected to the outside of the two-way tension stirrup cages tangent.

Further, multiple sets of hooks are provided on the inside of the hook steel plate member. The position of each set of hooks corresponds to each layer of two-way tension stirrups on the two-way tension stirrup cage. Each group of hooks includes Multiple hooks laid along the transverse steel bars.

Further, the inner steel pipe and the outer steel pipe are rectangular, circular or oval steel pipes.

Further, the hook is a trough-shaped hook formed by bending a steel bar into three sections and with an opening facing downward. One end of the hook is welded to the inner wall of the steel plate component.

A construction method for a hollow sandwich steel tube concrete pouring body, including the following steps:

a. Determine the sizes of the inner steel pipe, outer steel pipe and two-way tension stirrup cage according to the actual construction conditions, assemble the inner steel pipe and two-way tension stirrup cage, and prepare the ordinary steel plate components and hook steel plate components used to assemble the outer steel pipe. The hook steel plate component includes a steel plate component and multiple sets of hooks fixed on the inside of the steel plate component. The position of each set of hooks corresponds to each layer of two-way tension stirrups on the two-way tension stirrup cage. The connection between the two-way tension stirrup cage and the hook steel plate component is provided with transverse steel bars laid transversely corresponding to the position of the hook. The transverse steel bars are welded to the ends of the two-way tension stirrups, and the cross-section steel bars laid in the same direction on the same layer are Two-way tension stirrups are connected into a whole;

b. After fixing the inner steel pipe to the bottom plate or foundation, put the two-way tension stirrup cage on the outside of the inner steel pipe from top to bottom, and then weld and fix the inside of the two-way tension stirrup cage with the outer wall of the inner steel pipe;

c. Determine the pre-installation position of the ordinary steel plate component and the hook steel plate component of the outer steel pipe on the outside of the two-way tension stirrup cage. The pre-installation position of the hook steel plate component is to facilitate workers to install the ordinary steel plate component and the two-way tension stirrup cage. The cage is welded, and then the ordinary steel plate components are connected to the bottom plate or foundation. The ordinary steel plate components are welded to the outside of the two-way tension stirrup cage through the pre-installation position of the hook steel plate components, and then the hook steel plate components are passed through multiple sets of bends. The hook hanging device is fixed on the transverse steel bars of the two-way tension stirrup cage, and the bottom of the hook steel plate component is fixed to the bottom plate or foundation. Finally, the adjacent ordinary steel plate components and the hook steel plate component are welded and assembled, so that the inner A hollow interlayer with built-in two-way tension stirrup cage is formed between the steel pipe and the outer steel pipe;

d. Pour concrete in the hollow interlayer and vibrate it tightly.

By adopting the above solution, after the inner steel pipe is connected to the two-way tension stirrup cage, when the outer steel pipe is fixed, the hook steel plate component is hung on the two-way tension stirrup cage through the hook, thereby preventing the ordinary steel plate component from being connected to the two-way tension stirrup cage. After the tension stirrup cage is welded, the space between the inner and outer steel pipes is too small to weld the remaining steel plate components to the two-way tension stirrup cage, thereby facilitating the installation of the external steel pipe, and the concrete pouring of the steel tube made in this way The body makes up for the shortcomings of insufficient restraint of the concrete by the outer and outer steel pipes of the hollow sandwich steel tube concrete pouring body and the lack of restraint of the inner steel pipe on the concrete. It improves the bearing capacity of the hollow sandwich steel tube concrete pouring body and further optimizes its structural performance.

Further, the inner steel pipe and the outer steel pipe are rectangular, circular or oval steel pipes.

Further, the two-way tension stirrup cage includes a plurality of positioning longitudinal bars arranged along the height direction for positioning and two-way tension stirrups fixed on the positioning longitudinal bars and arranged laterally. The two-way tension stirrups are positioned in the Multiple layers are arranged on the longitudinal bars at a certain distance along the extension direction of the positioning longitudinal bars. The two ends of the two-way tension stirrups are respectively fixed on the opposite surfaces of the inner and outer steel pipes and on the opposite surfaces of the outer steel pipe. The two-way tension stirrups The middle part is fixed on the positioning longitudinal rib.

Furthermore, when the two-way tension stirrup cage is being manufactured, the transverse steel bars connected to the two-way tension stirrup cage and the hook steel plate components are retracted inward by a distance matching the size of the hook to accommodate the hook. .

Further, the hook is a steel bar bent into three groove-shaped hooks with a length of 20mm. One side of the hook is fixed on the inner wall of the steel plate member through welding. The specific steps for welding the hook are as follows: First, weld the hook on the steel plate member according to The axial spacing of the transverse steel bars on the two-way tension stirrup cage is marked with hook positioning, and the hooks are welded at the corresponding marks, with the openings of the hooks facing downwards.

After adopting the above technical solution, the present invention has the following advantages:

1. High economic benefits.

By combining two-way tension stirrup restraint, welding, and casing, the present invention combines the advantages of welding hollow sandwich steel pipes, simple and convenient node processing, and effective tensioning of steel pipes by tie bars, forming a The hollow sandwich steel tube concrete cast body is light in weight, high in bearing capacity, good in ductility and easy to construct, and has good economic benefits.

2. Simple form and convenient operation.

The present invention uses rectangular steel pipes. Compared with round steel pipes, the node processing is simpler; the present invention combines two-way tension stirrups and positioning longitudinal bars into a two-way tension stirrup cage and places it in the hollow steel pipe sandwich. Compared with the steel pipe, The internal length is provided with tie rods, stiffening ribs, circular stirrups and other measures. The form is simple. At the same time, internal and external steel pipes are used to place relevant components in a preset order, and a construction method that combines welding tie rod cages and hook sleeves is used. It can avoid opening holes in the steel pipe, keep the appearance of the steel pipe clean, and the process is clear and easy to operate.

3. Enhance the restraint effect.

The two-way tension stirrups of the present invention strengthen the restraining effect of the end points and midpoints of the outer and inner steel pipes on the concrete, enhance the stability of the steel pipe wall, effectively delay and slow down the outer drum buckling of the steel pipe, and the larger the diameter of the tie bars, , the more obvious the enhancement effect.

4. The structural performance is further optimized.

Compared with the ordinary hollow sandwich steel tube concrete pouring body, the bearing capacity, stiffness and ductility of the hollow sandwich steel tube concrete pouring body with tie bars are significantly improved. The larger the diameter of the two-way tension stirrups, the higher the bearing capacity and ductility.

In summary, the present invention integrates the hollow sandwich steel pipe and the two-way tension stirrup cage by using the connection means of welding and hook casing, and combines the advantages of the rectangular steel pipe welding tie bars to effectively tie the steel pipe. The construction operation is simple and convenient, which makes up for the shortcomings of insufficient restraint effect of the outer and outer steel pipes on the concrete in the hollow sandwich steel tube concrete pouring body and the lack of restraint effect of the inner steel pipe on the concrete. It improves the bearing capacity of the hollow sandwich steel tube concrete pouring body and further optimizes its structural performance. . The invention can utilize the holes in the inner steel pipe as the vertical transportation channel of the pipeline and the anchoring end of the bridge cable, and is suitable for the piers of viaducts, support columns of ocean platform structures, giant combined frame columns, transmission and transformation pole towers, and large-scale pouring. Piles and civil engineering fields that may be subject to freezing loads.

Description of the drawings

Figure 1 is a schematic structural cross-sectional view of a hollow sandwich steel tube concrete column with tie bars according to the present invention.

Figure 2 is a schematic structural diagram of the hook of the present invention.

Figure 3 is a schematic plan view of the middle section of the structural column of the present invention.

Figure 4 is a schematic structural diagram of the outer steel pipe of the present invention.

Figure 5 is a schematic structural diagram of the steel plate member of the present invention.

Figure 6(a) is a side view of the steel plate member with hooks of the present invention.

Figure 6(b) is a front view of the steel plate member with hooks of the present invention.

Figure 7 is a perspective view of the two-way tension stirrup cage of the present invention.

Figure 8(a) is a top view of Figure 7.

Figure 8(b) is a front view of Figure 7.

Figure 9 is a diagram of an embodiment of a high concrete pier with a rectangular cross-section according to the present invention.

Figure 10 is a diagram of an embodiment of a high concrete pier with a circular cross-section according to the present invention.

Figure 11 is a diagram of an embodiment of the present invention with an elliptical/round end-shaped concrete high pier in cross section.

In the picture: 1. Inner steel pipe, 2. Outer steel pipe, 3. Two-way tension stirrups, 4. Concrete, 5. Ordinary steel plate components, 6. Hook steel plate components, 7. Hooks, 8. Positioning longitudinal bars, 9 .Transverse reinforcement.

Detailed ways

In order to better understand the present invention, the invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples, but the embodiments of the present invention are not limited thereto.

This example discloses the structure of a hollow sandwich steel tube concrete column with tie bars, which is suitable for a hollow sandwich steel tube concrete column with two concentric square steel tubes placed at equal intervals.

As shown in Figure 1 and Figure 3, it is a hollow sandwich steel tube concrete column with tie bars, including an inner steel pipe 1 and an outer steel pipe 2 assembled and welded by straight steel plate members, and a hollow interlayer between the inner steel pipe 1 and the outer steel pipe 2. There is a built-in two-way tension stirrup cage and concrete is poured 4.

As shown in Figure 2, the curved hook 7 is formed by bending three sections of straight steel bars, and the lengths of the three sections are all 20mm.

As shown in Figures 4 and 5, the inner steel pipe 1 is assembled and welded by ordinary steel plate components 5.

As shown in Figure 6 (a) and Figure 6 (b), the outer steel pipe is composed of a combination of an ordinary steel plate member 5 and a hook steel plate member 6. The hook steel plate member 6 is composed of a hook 7 welded on the steel plate member.

As shown in Figures 3, 7, 8(a), and 8(b), the two-way tension stirrup cage includes a plurality of positioning longitudinal bars 8 arranged along the height direction for positioning and fixed Two-way tension stirrups 3 are laid transversely on the positioning longitudinal bars. The two-way tension stirrups 3 are arranged in multiple layers on the positioning longitudinal bars 8 along the extension direction of the positioning longitudinal bars 8 at a certain distance. The two ends of the bars 3 are respectively fixed on the opposite surfaces of the inner and outer steel pipes and on the opposite surfaces of the outer steel pipes. The middle part of the two-way tension stirrups 3 is fixed on the positioning longitudinal bar 8. The two-way tension stirrups cage and the hook The connection points of the steel plate members 6 are provided with transverse steel bars 9 arranged transversely corresponding to the positions of the hooks. The transverse steel bars 9 are welded to the ends of the two-way tension stirrups to connect the two-way tension stirrups arranged in the same direction on the same layer. into a whole,

In order to improve the welding strength, the two ends of the two-way tension stirrups welded to the inner and outer steel pipes are bent and set tangent to the inner walls of the inner and outer steel pipes, and then fixed to the inner walls of the inner and outer steel pipes through welding, so that they are bent The welding area can be increased and the welding strength can be increased. The vertical intersections of the two-way tension stirrups are connected by spot welding.

The horizontal arrangement spacing of the two-way tension stirrups 3 is 150 to 200 mm, and the longitudinal arrangement spacing is 100 mm. The positioning longitudinal bars 8 are arranged throughout the length. The vertical intersections of the two-way tension stirrups 3 and the positioning longitudinal bars 8 are connected by spot welding.

After the inner steel pipe 1 is connected to the bottom plate or foundation, the two-way tension stirrup cage is placed on the outside of the inner steel pipe 1. First, the inside of the two-way tension stirrup cage is connected to the outer wall of the inner steel pipe 1 through welding, and then the two ordinary steel plates are connected The component 5 is connected to the bottom plate or foundation. The periphery of the two-way tension stirrup cage is welded to the ordinary steel plate component 5. The welding area can increase the welding area and improve the welding strength. Then the steel plate component 6 with hooks and the two-way brace are connected. The designated sides of the tie stirrup cage are nested to form a hollow sandwich steel pipe column with tie bars.

The construction method of the hollow sandwich steel tube concrete column with tie bars in this embodiment includes the following steps:

(1) Design according to actual needs and determine the size of the inner and outer steel pipes as well as the type and arrangement spacing of the tension stirrups;

(2) According to the dimensions designed in the drawing, select ordinary steel plate members 5 to assemble and weld into the inner steel pipe 1; select four ordinary steel plate members 5, marked A, B, C, and D respectively, and assemble them on the steel plate members A and C. point positioning mark;

(3) According to the design requirements, process the two-way tension stirrup cage and curved hook 7; the two-way tension stirrups 3 in the two-way tension stirrup cage are arranged at equal intervals along the length and height of the rectangular steel pipe, and are welded with the positioning longitudinal bars 8 Integrated into one body, the vertical intersections of steel bars are connected by spot welding;

(4) Weld hooks 7 at the positioning marks on steel plate members A and C to form hook steel plate members 6, and then move the hook steel plate members A and C, ordinary steel plate members B and D and the two-way tension stirrup cages Arrive at the construction site, draw its positioning baseline on the construction site, and first connect the inner steel pipe 1 to the bottom plate or foundation through welding or other connection methods;

(5) Lower the prefabricated two-way tension stirrup cage and put it on the outside of the inner steel pipe 1, and weld the inside of the two-way tension stirrup cage to the outer wall of the inner steel pipe 1;

(6) Connect the ordinary steel plate components B and D to the bottom plate or foundation, weld and connect the periphery of the two-way tension stirrup cage with the ordinary steel plate components B and D; connect the hook steel plate components A and C with the designated sides of the tie cage In the nesting operation, hook steel plate components A and C are connected to the base plate or foundation through welding or other connection methods; hook steel plate components A and C are welded and assembled with ordinary steel plate components B and D to form built-in two-way tension stirrups. The hollow sandwich square steel pipe column of the cage;

(7) Pour concrete 4 into the interlayer of the hollow steel pipe column and vibrate it tightly.

Example:

As shown in Figures 9, 10, and 11, the structure and method of the present invention are used to produce hollow sandwich reinforced steel tube concrete high piers. The cross-section of concrete piers can be rectangular, circular, oval or round-ended.

In addition, it should be noted that this patent is not limited to the above embodiments. As long as the specific size or shape of the part is not specified, the part can be of any size or shape that is suitable for its structure, regardless of its material composition. Any changes, including the use of the structural design provided by the present invention, are deformations of the present invention and should be considered to be within the protection scope of the present invention.

Claims (13)

1. A hollow sandwich steel tube concrete pouring body with tie bars, characterized by: including an inner steel pipe (1), an outer steel pipe (2) coaxially installed outside the inner steel pipe (1), and the inner and outer steel pipes (2) poured ), a two-way tension stirrup cage is installed in the interlayer between the inner and outer steel pipes (2), and the inner and outer sides of the two-way tension stirrup cage are respectively connected with the inner steel pipe (2) 1) Fixed with the outer steel pipe (2), the steel cage fixedly connects the inner steel pipe (1) to the opposite surface of the outer steel pipe (2) and the opposite surface of the outer steel pipe (2); The outer steel pipe (2) includes an ordinary steel plate member (5) and a hook steel plate member (6). The hook steel plate member (6) includes a steel plate member and a hook fixed on the inside of the steel plate member. The two-way pull The connection between the stirrup cage and the hook steel plate component (6) is provided with transverse steel bars (9) laid transversely corresponding to the position of the hooks. The transverse steel bars (9) are welded to the two-way tension hoops that form the two-way tension stirrup cage. The end of the bar (3) connects the two-way tension stirrups (3) arranged in the same direction on the same layer into a whole, and at least one of the ordinary steel plate components (5) is welded to the two-way tension stirrup cage. , the hook steel plate component (6) is fixed on the transverse steel bar (9) of the two-way tension stirrup cage through hook hanging, adjacent ordinary steel plate component (5), adjacent hook steel plate component (6 ) and welding between adjacent ordinary steel plate components (5) and hooked steel plate components (6). 2. The hollow sandwich steel tube concrete cast body with tie bars according to claim 1, characterized in that: the two-way tension stirrup cage includes a plurality of positioning longitudinal bars (8) arranged along the height direction for positioning and Two-way tension stirrups (3) are fixed on the positioning longitudinal bars (8) and arranged laterally. The two-way tension stirrups (3) are arranged on the positioning longitudinal bars (8) along the extending direction of the positioning longitudinal bars (8) in a certain direction. There are multiple layers arranged at intervals, and the two ends of the two-way tension stirrups (3) are respectively connected to the opposite surfaces of the inner steel pipe (1) and the outer steel pipe (2) and to the opposite surfaces of the outer steel pipe (2). The two-way tension stirrups The middle part of (3) is fixed on the positioning longitudinal bar (8). 3. The hollow sandwich steel tube concrete pouring body with tie bars according to claim 2, characterized in that the diameter of the two-way tension stirrups (3) is larger than the diameter of the positioning longitudinal bars (8). 4. The hollow sandwich steel tube concrete pouring body with tie bars according to claim 2, characterized in that: the two-way tension stirrups (3) on the same layer are arranged at a spacing of 150 to 200 mm in the horizontal direction, and the distance between adjacent layers is 150 to 200 mm. The longitudinal spacing of the two-way tension stirrups (3) is 100mm. 5. The hollow sandwich steel tube concrete pouring body with tie bars according to claim 1, characterized in that: the preset installation position of the hook steel plate component (6) on the two-way tension stirrup cage is the welding construction activity area , the welding construction activity area is an area convenient for welding the ordinary steel plate component (5) and the two-way tension stirrup cage. After the ordinary steel plate component (5) is welded, the hook steel plate component (6) passes The hooks are hung and fixed on the transverse steel bars (9) of the two-way tension stirrup cage, and the hook steel plate component (6) is tangent to the outside of the two-way tension stirrup cage. 6. The hollow sandwich steel tube concrete pouring body with tie bars according to claim 1, characterized in that: there are multiple groups of hooks on the inside of the hook steel plate component (6), and the position of each group of hooks is consistent with the position of the hooks. Each layer of the two-way tension stirrups (3) on the two-way tension stirrup cage has a corresponding position, and each set of hooks includes multiple hooks arranged along the transverse steel bars (9). 7. The reinforced hollow sandwich steel tube concrete pouring body according to claim 1, characterized in that: the inner steel pipe (1) and the outer steel pipe (2) are rectangular steel pipes, circular steel pipes or oval steel pipes. 8. The hollow sandwich steel tube concrete pouring body with tie bars according to claim 1, characterized in that: the hook is a groove-shaped hook formed by bending the steel bar into three sections and with the opening facing downwards. One end is welded to the inner wall of the steel plate member. 9. A construction method for a hollow sandwich steel tube concrete pouring body, which is characterized by: including the following steps: a. Determine the dimensions of the inner steel pipe (1), outer steel pipe (2), and two-way tension stirrup cage according to the actual construction conditions, assemble the inner steel pipe (1) and the two-way tension stirrup cage, and prepare to assemble the outer steel pipe (2) ) and an ordinary steel plate member (5) and a hooked steel plate member (6). The hooked steel plate member (6) includes a steel plate member and multiple sets of hooks fixed on the inside of the steel plate member. The position of each set of hooks Corresponding to each layer of two-way tension stirrups (3) on the two-way tension stirrup cage, the connection between the two-way tension stirrup cage and the hook steel plate member (6) is provided with horizontally arranged horizontally corresponding to the position of the hook. Transverse steel bars (9), the transverse steel bars (9) are welded to the ends of the two-way tension stirrups (3), and connect the two-way tension stirrups (3) arranged in the same direction on the same layer into a whole; b. After fixing the inner steel pipe (1) to the bottom plate or foundation, put the two-way tension stirrup cage on the outside of the inner steel pipe (1) from top to bottom, and then connect the inside of the two-way tension stirrup cage with the inner steel pipe (1) The outer wall is welded and fixed; c. Install the outer steel pipe (2): First determine the pre-installation position of the ordinary steel plate component (5) and the hook steel plate component (6) of the outer steel pipe (2) on the outside of the two-way tension stirrup cage. The hook steel plate component The pre-installation position of (6) is to facilitate the welding activities of the ordinary steel plate component (5) and the two-way tension stirrup cage. Then the ordinary steel plate component (5) is connected to the bottom plate or foundation, and the hook steel plate component (6) The ordinary steel plate component (5) is welded to the outside of the two-way tension stirrup cage at the pre-installation position, and then the hook steel plate component (6) is fixed to the transverse steel bars of the two-way tension stirrup cage through multiple sets of hooks. (9), and fix the bottom of the hook steel plate component (6) with the bottom plate or foundation, and finally connect the adjacent ordinary steel plate component (5), the adjacent hook steel plate component (6) and the ordinary steel plate component (5) with The hook steel plate members (6) are welded and assembled to form a hollow sandwich with a built-in two-way tension stirrup cage between the inner steel pipe (1) and the outer steel pipe (2); d. Pour concrete in the hollow interlayer and vibrate it tightly. 10. The construction method of hollow sandwich steel tube concrete pouring body according to claim 9, characterized in that: the inner steel pipe (1) and the outer steel pipe (2) are rectangular steel pipes, circular steel pipes or oval steel pipes. 11. The construction method of hollow sandwich steel tube concrete pouring body according to claim 9, characterized in that: the two-way tension stirrup cage includes a plurality of positioning longitudinal bars (8) arranged along the height direction for positioning and Two-way tension stirrups (3) are fixed on the positioning longitudinal bars (8) and arranged laterally. The two-way tension stirrups (3) are arranged on the positioning longitudinal bars (8) along the extending direction of the positioning longitudinal bars (8) in a certain direction. There are multiple layers arranged at intervals, and the two ends of the two-way tension stirrups (3) are respectively fixed on the opposite surfaces of the inner and outer steel pipes (2) and the opposite surfaces of the outer steel pipe (2). The two-way tension stirrups (3) The middle part is fixed on the positioning longitudinal rib (8). 12. The construction method of hollow sandwich steel tube concrete pouring body according to claim 9, characterized in that: when the two-way tension stirrup cage is produced, the two-way tension stirrup cage is in contact with the hook steel plate component (6). The connected transverse steel bars (9) are retracted inward by a distance matching the size of the hook to accommodate the hook. 13. The construction method of hollow sandwich steel tube concrete pouring body according to claim 9, characterized in that: the hook is a steel bar bent into three groove-shaped hooks with a length of 20 mm, and one side of the hook is fixed by welding The specific steps for welding hooks on the inner wall of the steel plate member are as follows: First, mark the hook positioning on the steel plate member according to the axial spacing of the transverse steel bars on the two-way tension stirrup cage, weld the hooks at the corresponding marks, and the hook opening faces Uniformly downward.