Connecting joint of steel containment structure and floor wall and construction method

Abstract

The invention discloses a connecting joint of a steel containment structure and a floor wall and a construction method, and belongs to the technical field of building structures, the connecting joint comprises first profile steel, a UHPC section and a common concrete section, the first profile steel is arranged inside the steel containment structure, the UHPC section is arranged outside the steel containment structure, and the UHPC section is connected with the common concrete section; the UHPC section comprises UHPC, a plurality of second profile steels and a steel bottom plate, the plurality of second profile steels are arranged at the upper part of the steel bottom plate, and the steel bottom plate and the plurality of second profile steels are connected with the exterior of the steel containment structure; the upper portion of the steel bottom plate is further provided with lower floor steel bars, and constructional steel bars are arranged between the steel bottom plate and the second profile steel. A plurality of studs are arranged at the top of the second profile steel, a plurality of rotating supporting pieces are further arranged at the top of the second profile steel, and upper floor slab reinforcing steel bars are arranged on the upper portions of the rotating supporting pieces; and the UHPC is arranged between the steel bottom plate close to the steel containment structure and the upper floor reinforcing steel bars. And effective and stable connection between the steel containment structure and the floor wall joint structure can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a connection node between a steel containment structure and a floor wall and a construction method. Background Art

[0002] The reactor building of a nuclear power plant is often a steel containment structure (SC), and the walls and floor slabs of the auxiliary building are connected to the steel containment structure to form a SC-RC connection structure. The existing construction method of the above connection structure is that the prefabrication plant pre-opens holes and reserves sleeves on the steel containment structure, prefabricates steel bars inside the steel containment structure, and then connects the steel bars to the reserved sleeves when constructing the wall panels on site.

[0003] However, this method has several problems. First, since the diameter of the steel bars of the wall or floor is determined in advance, if there is a need to increase the reinforcement in the subsequent design update, the steel bars inside the steel containment structure cannot be replaced and additional reinforcement measures are required, which has poor practicality and flexibility. Second, by opening a large number of holes in a concentrated position on the steel containment structure, the rigidity of the steel containment structure itself is weakened, thereby forming a weak point, which is not conducive to the strength and stability of the overall structure. Third, after reserving the sleeve, the steel bars in the wall or floor need to be installed on site. Currently, the steel bar binding work is mainly completed manually. Since the third-generation nuclear power plant design is subject to large earthquake effects, accident temperature loads and equipment loads, the designed floor thickness is large, the number of steel bar layers selected is large, and the steel bar diameter is generally thicker. Therefore, if the positioning and binding of the steel bars are completely dependent on manpower, the construction intensity is high, the safety risk is high, the construction efficiency is low and the working hours are long.

[0004] The Chinese invention patent with publication number CN119352703A provides a UHPC-based steel truss floor node structure and construction method, which mainly solves the problem of too long wet joint length between the steel truss floor and the wall, but cannot solve many problems at the connection node between the steel containment structure and the floor wall. Therefore, how to design a connection node and construction method between the steel containment structure and the floor wall to ensure the stability of the overall structure while improving the flexibility of use and construction efficiency is an urgent problem to be solved in the current nuclear power plant building structure design. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a connection node and a construction method for a steel containment structure and a floor wall, which changes the traditional connection method of the steel containment structure and the floor wall. By introducing a steel structure and combining the high performance of UHPC, an effective and stable connection of the node structure is achieved, while the practicability and flexibility of the node structure are improved, thereby improving the construction efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the present invention, a connection node between a steel containment structure and a floor wall is provided, comprising a first steel section, a UHPC segment and an ordinary concrete segment, wherein the first steel section is arranged inside the steel containment structure, the UHPC segment is arranged outside the steel containment structure corresponding to the first steel section, and an ordinary concrete segment is arranged at one end of the UHPC segment away from the steel containment structure;

[0008] The UHPC segment includes UHPC, a plurality of second steel sections and a steel bottom plate, wherein the steel bottom plate is connected to the outside of a steel containment structure, a plurality of second steel sections are provided on the upper portion of the steel bottom plate, and the plurality of second steel sections are connected to the outside of the steel containment structure; a lower floor slab reinforcement is also provided on the upper portion of the steel bottom plate, and structural reinforcement is provided between the steel bottom plate and the second steel sections; a plurality of bolts are provided on the top of the second steel section, and a plurality of rotating supports are also provided on the top of the second steel section, and upper floor slab reinforcement is provided on the upper portion of the plurality of rotating supports; the UHPC is arranged between the steel bottom plate close to the steel containment structure and the upper floor slab reinforcement.

[0009] In some embodiments of the present invention, the first steel section is transversely arranged inside the steel containment structure, the width of the first steel section is consistent with the width of the UHPC segment, and the width of the UHPC segment is consistent with the width of an ordinary concrete segment.

[0010] In some embodiments of the present invention, the length of the UHPC segment is greater than the length of a conventional concrete segment.

[0011] In some embodiments of the present invention, the plurality of second steel sections are vertically arranged on the steel bottom plate at a certain interval.

[0012] In some embodiments of the present invention, the length of the second steel section is consistent with the length of the steel bottom plate.

[0013] In some embodiments of the present invention, the lower floor slab steel bars include a plurality of transverse lower floor slab steel bars and a plurality of longitudinal lower floor slab steel bars, the length of the longitudinal lower floor slab steel bars being greater than the length of the steel bottom plate, the longitudinal lower floor slab steel bars extending out of the steel bottom plate in a direction away from the steel containment structure, the transverse lower floor slab steel bars being arranged on the longitudinal lower floor slab steel bars extending out of the steel bottom plate, and ordinary concrete segments being arranged at the intersection of the longitudinal lower floor slab steel bars and the transverse lower floor slab steel bars.

[0014] In some embodiments of the present invention, the longitudinal lower floor slab reinforcement is arranged parallel to the length direction of the second steel section, and the transverse lower floor slab reinforcement is arranged perpendicular to the length direction of the second steel section.

[0015] In some embodiments of the present invention, the upper floor slab steel bars include longitudinal upper floor slab steel bars and transverse upper floor slab steel bars, the longitudinal upper floor slab steel bars are arranged on a rotating support, and the longitudinal upper floor slab steel bars are arranged parallel to the length direction of the second steel section; the longitudinal upper floor slab steel bars are provided with transverse upper floor slab steel bars, and the transverse upper floor slab steel bars are arranged perpendicular to the length direction of the second steel section, and the transverse upper floor slab steel bars and the longitudinal upper floor slab steel bars are crossed to form a mesh structure.

[0016] In some embodiments of the present invention, the rotating support member includes a T-shaped rod, a connecting member and a mounting member; the upper part of the horizontal rod of the T-shaped rod is provided with an upper floor slab reinforcement, and the bottom of the vertical rod of the T-shaped rod is rotatably installed on the connecting member, the connecting member is connected to the mounting member, and the mounting member is arranged on the second steel section.

[0017] In a second aspect of the present invention, a construction method for a connection node between a steel containment structure and a floor wall is provided, comprising:

[0018] In the prefabrication stage, the thickness and length of the steel bottom plate, the cross-sectional dimensions and arrangement spacing of the first steel and the second steel, the number and arrangement spacing of the studs are calculated and determined, the steel bottom plate, the first steel, the second steel and a number of studs are arranged on the steel containment structure, and the assembled steel containment structure is hoisted;

[0019] During the hoisting stage, the length direction of the crossbar of the upper T-shaped bar in the rotating support is set to be parallel to the length direction of the second steel section, and the transverse lower floor slab steel bars are pre-tied off-site at the ends of the longitudinal lower floor slab steel bars to form a steel mesh, and the steel mesh is hoisted to the upper part of the steel bottom plate in an integrated manner, wherein the longitudinal lower floor slab steel bars use the steel bottom plate as a support, and the longitudinal lower floor slab steel bars extending out of the steel bottom plate are provided with transverse lower floor slab steel bars;

[0020] Install structural reinforcement, which is arranged between the steel bottom plate and the second steel section in the same manner as conventional waist reinforcement;

[0021] After controlling the upper T-bar in the rotating support so that the length direction of the crossbar of the T-bar is perpendicular to the length direction of the second steel section, the upper floor slab reinforcement installed in advance on site is hoisted onto the crossbar of the T-bar;

[0022] UHPC is poured between the steel bottom plate near the steel containment structure and the upper floor reinforcement to form a UHPC segment, and ordinary concrete is poured at the intersection of the longitudinal lower floor reinforcement and the transverse lower floor reinforcement extending out of the steel bottom plate to form an ordinary concrete segment;

[0023] Cured to the specified strength;

[0024] Complete the connection nodes between the steel containment structure and the floor wall.

[0025] One or more technical solutions of the present invention have the following beneficial effects:

[0026] The connection node and construction method of the steel containment structure and the floor wall provided by the present invention change the traditional connection mode of the steel containment structure and the floor wall, avoid the problem that the rigidity of the containment structure itself becomes weak and the structure is unstable due to the pre-drilling of holes on the SC to install the steel sleeve and the steel bar pattern steel, and at the same time improve the practicality and flexibility of the node structure. By introducing the steel structure and combining the high performance of UHPC, the effective and stable connection of the node structure is achieved;

[0027] In addition, by introducing the steel bottom plate as the node connection structure, the end of the steel bars at the bottom of the floor slab can be supported, and it can also be used as a two-way force-bearing member to replace part of the main bars of the lower floor slab, so that the steel bars at the bottom of the floor slab can be pre-tied on site to form a steel mesh, and then hoisted in an integrated manner, which improves construction efficiency, reduces manual operations, and reduces the workload of operators;

[0028] By setting the rotating support, it can be used as the end support of the upper steel bars of the floor slab, so that the upper steel bars of the floor slab can be tied in advance on site to form a steel mesh and then hoisted in an integrated manner, thereby improving the construction efficiency. When the rotating support hoists and places the lower steel bars on the steel bottom plate, the upper T-shaped structure is parallel to the direction of the steel section, so there will be no hoisting collision;

[0029] The use of UHPC can reduce the lap length of steel bars from the conventional 35d to 45d (d is the diameter of the steel bar) to about 13d, so that there will not be excessive weight increase after the connection node is installed in the steel containment structure, making it convenient for lifting and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic top view of a connection node between a steel containment structure and a floor wall provided in Example 1 of the present invention;

[0031] Figure 2 The embodiment 1 of the present invention provides Figure 1 Sectional view at AA;

[0032] Figure 3 The embodiment 1 of the present invention provides Figure 1 Sectional view at the middle BB;

[0033] Figure 4 This is a schematic structural diagram of the rotating support member provided in Example 1 of the present invention.

[0034] In the figure: 1. Steel containment structure; 2. First steel section; 3. Second steel section; 4. Steel bottom plate; 5. Upper floor reinforcement; 6. Lower floor reinforcement; 7. UHPC; 8. Ordinary concrete segment; 9. Studs; 10. Rotating support; 101. T-bar; 102. Connector; 103. Mounting part; 11. Structural reinforcement. DETAILED DESCRIPTION

[0035] The UHPC is ultra high performance concrete.

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Example 1

[0038] In a typical embodiment of the present invention, a connection node between a steel containment structure 1 and a floor wall is provided, comprising a first steel section 2, a UHPC segment and an ordinary concrete segment 8, wherein the first steel section 2 is arranged inside the steel containment structure 1, the UHPC segment is arranged outside the steel containment structure 1 corresponding to the first steel section 2, and an ordinary concrete segment 8 is arranged at one end of the UHPC segment away from the steel containment structure 1;

[0039] The UHPC segment includes UHPC7, a plurality of second steel sections 3 and a steel bottom plate 4, wherein the steel bottom plate 4 is connected to the outside of the steel containment structure 1, and a plurality of second steel sections 3 are provided on the upper part of the steel bottom plate 4, wherein the plurality of second steel sections 3 are connected to the outside of the steel containment structure 1; a lower floor reinforcement 6 is also provided on the upper part of the steel bottom plate 4, and a structural reinforcement 11 is provided between the steel bottom plate 4 and the second steel sections 3; a plurality of bolts 9 are provided on the top of the second steel sections 3, and a plurality of rotating supports 10 are also provided on the top of the second steel sections 3, and upper floor reinforcement 5 is provided on the upper part of the plurality of rotating supports 10; the UHPC7 is arranged between the steel bottom plate 4 and the upper floor reinforcement 5 close to the steel containment structure 1.

[0040] In this embodiment, a plurality of bolts 9 are provided on the top of the second steel section 3, which can increase the bonding ability between the second steel section 3 and the UHPC 7, thereby improving the shear resistance of the entire connection node UHPC segment.

[0041] In some embodiments of the present invention, the first steel section 2 is transversely arranged inside the steel containment structure 1 , the width of the first steel section 2 is consistent with the width of the UHPC segment, and the width of the UHPC segment is consistent with the width of the ordinary concrete segment 8 .

[0042] In some embodiments of the present invention, the length of the UHPC segment is greater than the length of the ordinary concrete segment 8. Since UHPC7 has better performance as an ultra-high performance concrete segment, making the length of the UHPC segment greater than the length of the ordinary concrete segment 8 can ensure the strength and stability of the node structure. Considering the cost issue, while ensuring the stability of the overall connection node, setting the ordinary concrete segment 8 at the end of the UHPC segment can reduce a certain cost.

[0043] In some embodiments of the present invention, the plurality of second steel sections 3 are respectively arranged vertically on the steel bottom plate 4 at a certain distance. The plurality of second steel sections 3 can strengthen the strength of the connection node itself, and at the same time, a rotating support 10 is arranged on the second steel section 3, so that the cross bar of the T-shaped bar 101 can be adjusted to facilitate the hoisting of the lower longitudinal floor reinforcement to the steel bottom plate 4. After the lower floor reinforcement 6 is hoisted, the cross bar of the T-shaped bar 101 can be adjusted so that the length direction of the cross bar of the T-shaped bar 101 is perpendicular to the length direction of the second steel section 3, and the upper floor reinforcement 5 installed in advance on the site is hoisted on the cross bar of the T-shaped bar 101 to support the upper floor reinforcement 5, so that the overall construction process is more efficient and the work intensity of the operators is reduced.

[0044] In some embodiments of the present invention, the length of the second steel section 3 is consistent with the length of the steel bottom plate 4 .

[0045] In this embodiment, the length of the second steel section 3 is consistent with that of the steel bottom plate 4, and the length of the UHPC segment is also consistent with that of the second steel section 3 and the steel bottom plate 4. In conventional construction, the wet joint nodes such as the UHPC segment and the ordinary concrete segment 8 need to be located according to the drawings to determine which length range is ordinary concrete and which range is UHPC 7, so it is necessary to measure and install the wire mesh in the floor area. In this embodiment, the area where the UHPC is cast is the range where the steel bottom plate 4 and the second steel section 3 are arranged, so the wire mesh can be directly installed at the end of this area, and there is no need to set out and locate when positioning the wire mesh, which reduces the operation steps and greatly improves the operation efficiency.

[0046] In some embodiments of the present invention, the lower floor slab steel bars 6 include a plurality of transverse lower floor slab steel bars 6 and a plurality of longitudinal lower floor slab steel bars 6, the length of the longitudinal lower floor slab steel bars 6 is greater than the length of the steel bottom plate 4, the longitudinal lower floor slab steel bars 6 extend out of the steel bottom plate 4 in a direction away from the steel containment structure 1, the transverse lower floor slab steel bars 6 are arranged on the longitudinal lower floor slab steel bars 6 extending out of the steel bottom plate 4, and an ordinary concrete segment 8 is arranged at the intersection of the longitudinal lower floor slab steel bars 6 and the transverse lower floor slab steel bars 6.

[0047] In some embodiments of the present invention, the longitudinal lower floor slab reinforcement 6 is arranged parallel to the length direction of the second steel section 3 , and the transverse lower floor slab reinforcement 6 is arranged perpendicular to the length direction of the second steel section 3 .

[0048] In some embodiments of the present invention, the upper floor slab steel bars 5 include longitudinal upper floor slab steel bars 5 and transverse upper floor slab steel bars 5. The longitudinal upper floor slab steel bars 5 are arranged on the rotating support 10, and the longitudinal upper floor slab steel bars 5 are arranged parallel to the length direction of the second steel section 3; the longitudinal upper floor slab steel bars 5 are provided with transverse upper floor slab steel bars 5, and the transverse upper floor slab steel bars 5 are arranged perpendicular to the length direction of the second steel section 3. The transverse upper floor slab steel bars 5 and the longitudinal upper floor slab steel bars 5 are crossed to form a mesh structure.

[0049] In some embodiments of the present invention, the rotating support member 10 includes a T-shaped rod 101, a connecting member 102 and a mounting member 103; the upper part of the horizontal rod of the T-shaped rod 101 is provided with an upper floor slab reinforcement 5, and the bottom of the vertical rod of the T-shaped rod 101 can be rotatably installed on the connecting member 102, the connecting member 102 is connected to the mounting member 103, and the mounting member 103 is arranged on the second steel section 3.

[0050] In a second aspect of the present invention, a construction method for a connection node between a steel containment structure 1 and a floor wall is provided, comprising:

[0051] In the prefabrication stage, the thickness and length of the steel bottom plate 4, the cross-sectional dimensions and arrangement spacing of the first steel section 2 and the second steel section 3, and the number and arrangement spacing of the studs 9 are calculated and determined, the steel bottom plate 4, the first steel section 2, the second steel section 3 and a plurality of studs 9 are arranged on the steel containment structure 1, and the assembled steel containment structure 1 is hoisted;

[0052] During the hoisting stage, the length direction of the crossbar of the upper T-shaped rod 101 in the rotating support 10 is set to be parallel to the length direction of the second steel section 3, and the transverse lower floor slab steel bars 6 are tied in advance off-site at the ends of the longitudinal lower floor slab steel bars 6 to form a steel mesh, and the steel mesh is hoisted to the upper part of the steel bottom plate 4 in an integrated manner, wherein the longitudinal lower floor slab steel bars 6 use the steel bottom plate 4 as a support, and the longitudinal lower floor slab steel bars 6 extending out of the steel bottom plate 4 are provided with transverse lower floor slab steel bars 6;

[0053] Install the structural steel bars 11, which are arranged between the steel bottom plate 4 and the second steel section 3 according to the arrangement of conventional waist bars;

[0054] After controlling the upper T-shaped rod 101 in the rotating support 10 so that the length direction of the crossbar of the T-shaped rod 101 is perpendicular to the length direction of the second steel section 3, the upper floor slab reinforcement 5 installed in advance on site is hoisted onto the crossbar of the T-shaped rod 101;

[0055] Cast UHPC 7 between the steel bottom plate 4 and the upper floor reinforcement 5 near the steel containment structure 1 to form a UHPC segment, and cast ordinary concrete at the intersection of the longitudinal lower floor reinforcement 6 and the transverse lower floor reinforcement 6 extending out of the steel bottom plate 4 to form an ordinary concrete segment 8;

[0056] Cured to the specified strength;

[0057] Complete the connection nodes between the steel containment structure 1 and the floor wall.

[0058] The connection node and construction method of a steel containment structure 1 and a floor wall provided by the present invention change the traditional connection mode of the steel containment structure 1 and the floor wall, avoid the problem that the rigidity of the containment structure itself becomes weak and the structure is unstable due to the pre-drilling of holes on the SC to install steel sleeves and steel bar pattern steel, and at the same time improve the practicality and flexibility of the node structure. By introducing the steel structure and combining the high performance of UHPC7, an effective and stable connection of the node structure is achieved;

[0059] In addition, by introducing the steel bottom plate 4 as a node connection structure, the end of the steel bars at the bottom of the floor slab can be supported, and it can also be used as a bidirectional force-bearing member to replace part of the main bars of the lower floor slab, so that the steel bars at the bottom of the floor slab can be pre-tied on site to form a steel mesh, and then hoisted in an integrated manner, thereby improving construction efficiency, reducing manual operations, and reducing the workload of operators;

[0060] By setting the rotating support 10, it can be used as the end support of the upper steel bars of the floor slab, so that the upper steel bars of the floor slab can be tied in advance on site to form a steel mesh and then hoisted in an integrated manner, thereby improving the construction efficiency. When the rotating support 10 hoists and places the lower steel bars on the steel bottom plate 4, the upper T-shaped structure is parallel to the direction of the steel section, so there will be no hoisting collision;

[0061] The use of UHPC7 can reduce the steel bar lap length from the conventional 35d to 45d (d is the steel bar diameter) to about 13d, so that there will not be excessive weight increase after the connection node is installed in the steel containment structure 1, which is convenient for lifting and use.

[0062] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A connection node between a steel containment structure and a floor wall, characterized in that: It comprises a first steel section, a UHPC segment and a common concrete segment, wherein the first steel section is arranged inside a steel containment structure, the UHPC segment is arranged outside the steel containment structure corresponding to the first steel section, and a common concrete segment is arranged at one end of the UHPC segment away from the steel containment structure; The UHPC segment includes UHPC, a plurality of second steel sections and a steel bottom plate, wherein the steel bottom plate is connected to the outside of a steel containment structure, a plurality of second steel sections are provided on the upper portion of the steel bottom plate, and the plurality of second steel sections are connected to the outside of the steel containment structure; a lower floor slab reinforcement is also provided on the upper portion of the steel bottom plate, and structural reinforcement is provided between the steel bottom plate and the second steel sections; a plurality of bolts are provided on the top of the second steel section, and a plurality of rotating supports are also provided on the top of the second steel section, and upper floor slab reinforcement is provided on the upper portion of the plurality of rotating supports; the UHPC is arranged between the steel bottom plate close to the steel containment structure and the upper floor slab reinforcement.

2. A connection node between a steel containment structure and a floor wall as claimed in claim 1, characterized in that: The first steel section is transversely arranged inside the steel containment structure, the width of the first steel section is consistent with the width of the UHPC segment, and the width of the UHPC segment is consistent with the width of the ordinary concrete segment.

3. The connection node between a steel containment structure and a floor wall as claimed in claim 1, characterized in that: The length of the UHPC segment is greater than that of the ordinary concrete segment.

4. The connection node between a steel containment structure and a floor wall as claimed in claim 1, characterized in that: The plurality of second steel sections are vertically arranged on the steel bottom plate at a certain interval.

5. The connection node between a steel containment structure and a floor wall as claimed in claim 1, characterized in that: The length of the second steel section is consistent with the length of the steel bottom plate.

6. A connection node between a steel containment structure and a floor wall as claimed in claim 5, characterized in that: The lower floor slab reinforcement includes a plurality of transverse lower floor slab reinforcements and a plurality of longitudinal lower floor slab reinforcements. The length of the longitudinal lower floor slab reinforcements is greater than the length of the steel bottom plate. The longitudinal lower floor slab reinforcements extend out of the steel bottom plate in a direction away from the steel containment structure. The transverse lower floor slab reinforcements are arranged on the longitudinal lower floor slab reinforcements extending out of the steel bottom plate. Ordinary concrete segments are arranged at the intersections of the longitudinal lower floor slab reinforcements and the transverse lower floor slab reinforcements.

7. A connection node between a steel containment structure and a floor wall as claimed in claim 6, characterized in that: The longitudinal lower floor slab reinforcement is arranged in parallel with the length direction of the second steel section, and the transverse lower floor slab reinforcement is arranged perpendicular to the length direction of the second steel section.

8. The connection node between a steel containment structure and a floor wall as claimed in claim 1, characterized in that: The upper floor slab steel bars include longitudinal upper floor slab steel bars and transverse upper floor slab steel bars. The longitudinal upper floor slab steel bars are arranged on a rotating support, and the longitudinal upper floor slab steel bars are arranged parallel to the length direction of the second steel section. The longitudinal upper floor slab steel bars are provided with transverse upper floor slab steel bars, and the transverse upper floor slab steel bars are arranged perpendicular to the length direction of the second steel section. The transverse upper floor slab steel bars and the longitudinal upper floor slab steel bars are crossed to form a mesh structure.

9. The connection node between a steel containment structure and a floor wall as claimed in claim 1, characterized in that: The rotating support member includes a T-shaped rod, a connecting member and a mounting member; the upper part of the horizontal rod of the T-shaped rod is provided with an upper floor slab reinforcement, the bottom of the vertical rod of the T-shaped rod is rotatably mounted on the connecting member, the connecting member is connected to the mounting member, and the mounting member is arranged on the second steel section.

10. A construction method for a connection node between a steel containment structure and a floor wall as claimed in any one of claims 1 to 9, characterized in that: include: In the prefabrication stage, the thickness and length of the steel bottom plate, the cross-sectional dimensions and arrangement spacing of the first steel and the second steel, the number and arrangement spacing of the studs are calculated and determined, the steel bottom plate, the first steel, the second steel and a number of studs are arranged on the steel containment structure, and the assembled steel containment structure is hoisted; During the hoisting stage, the length direction of the crossbar of the upper T-shaped bar in the rotating support is set to be parallel to the length direction of the second steel section, and the transverse lower floor slab steel bars are pre-tied off-site at the ends of the longitudinal lower floor slab steel bars to form a steel mesh, and the steel mesh is hoisted to the upper part of the steel bottom plate in an integrated manner, wherein the longitudinal lower floor slab steel bars use the steel bottom plate as a support, and the longitudinal lower floor slab steel bars extending out of the steel bottom plate are provided with transverse lower floor slab steel bars; Install structural reinforcement, which is arranged between the steel bottom plate and the second steel section in the same manner as conventional waist reinforcement; After controlling the upper T-bar in the rotating support so that the length direction of the crossbar of the T-bar is perpendicular to the length direction of the second steel section, the upper floor slab reinforcement installed in advance on site is hoisted onto the crossbar of the T-bar; UHPC is poured between the steel bottom plate near the steel containment structure and the upper floor reinforcement to form a UHPC segment, and ordinary concrete is poured at the intersection of the longitudinal lower floor reinforcement and the transverse lower floor reinforcement extending out of the steel bottom plate to form an ordinary concrete segment; Cured to the specified strength; Complete the connection nodes between the steel containment structure and the floor wall.

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