Connecting structure at junction of water stop steel plate in basement corner post template and stirrup in post

Abstract

The utility model discloses a connecting structure at the junction of a water stop steel plate in a basement corner column formwork and a stirrup in a column. The water stop requirement of a construction joint in the column and the requirement of a stirrup pulling force on a main rib in the column are both considered. A water stop steel plate (8) turning by 90 degrees is arranged in a gap of a steel bar stand column (7) in a corner column at a horizontal construction joint (6), steel bar sealing rings are movably connected to the water stop steel plate (8) turning by 90 degrees in a sleeved mode respectively, a left-side semi-ring-shaped outer stirrup (11) is arranged on the left side of the water stop steel plate (8) turning by 90 degrees, and a right-side semi-ring-shaped outer stirrup (12) is arranged on the right side of the water stop steel plate turning by 90 degrees. The left-side semi-ring-shaped outer stirrup and the right-side semi-ring-shaped outer stirrup (12) are connected together in a pulling manner through a steel bar sealing ring to jointly form an annular sealing outer stirrup on a corner post inner steel bar stand column (7) penetrating through the water stop steel plate; the stirrup force of the annular stirrups on the main reinforcements in the column is guaranteed, and meanwhile the integrity of the water stop steel plate is guaranteed.

Description

Technical Field

[0001] The invention relates to a water stop steel plate in a cast-in-place basement concrete corner column template, and in particular to a connection structure at the intersection of a water stop steel plate in a casting template of a cast-in-place basement concrete corner column and stirrups in the column. Background Art

[0002] The basement exterior wall structure of existing high-rise buildings generally adopts a shear wall frame structure. In the cast-in-place construction of the concrete structure of the basement of the high-rise building, the raft slab, the basement foundation beam, and the lower column of the concrete corner column on the beam are cast at one time. On the concrete poured for the first time, the concrete of the upper column of the concrete corner column is poured. This two-time concrete pouring construction process will form a horizontal construction joint in the corner column concrete. Since the basement corner column is permanently buried in the soil in the later stage, in order to prevent the groundwater in the soil from penetrating into the basement through the above-mentioned horizontal construction joint, it is necessary to waterproof the horizontal construction joint. At present, the support process of the concrete pouring formwork system in the column is as follows: first, the main reinforcement of the corner column in the column is fixed vertically, and the position of the horizontal construction joint to be formed by the two concrete pourings in the column is determined. The water-stop steel plate is horizontally inserted from one side of the main reinforcement in the corner column into the gap of the vertical main reinforcement of the corner column, and the water-stop steel plate is arranged at the position where the horizontal construction joint is formed, which plays a role in cutting off the horizontal construction joint. Then, the corner column at the water-stop steel plate is vertically fixed. Binding of stirrups on the main reinforcement; Since a waterstop steel plate is inserted into the main reinforcement, the stirrups at the position of the waterstop steel plate cannot be tied in a circular closed manner. In order to achieve a circular closed and tight binding of the main reinforcement at this location, holes must be punched in the waterstop steel plate to achieve the closure of the circular stirrups; Since holes are not allowed to be opened in the waterstop steel plate, in order to ensure the integrity of the waterstop steel plate and achieve the circular tight closure of the main reinforcement at this location, the prior art has two solutions: (1) cutting off the closed circular stirrups and welding the cut portion of the circular stirrups to the waterstop steel plate to make the circular stirrups The reinforcement is tied together in a circular manner through the waterstop steel plate, thereby ensuring the tightening force of the stirrups at this location. Since the waterstop steel plate is relatively thin, welding can easily cause damage to the waterstop steel plate and form holes on the plate, affecting the waterstop effect of the waterstop steel plate; (2) Clamps are set on both sides of the waterstop steel plate, and the cut circular stirrups are fixed on the left and right clamps. The left and right clamps are fixed by passing through the upper end of the waterstop steel plate and the lower end of the waterstop steel plate through the connecting fixing bolts. However, the clamping force of the left and right clamps is limited and cannot meet the tensile strength requirements of the main reinforcement in the column on the stirrups. Summary of the invention

[0003] The invention provides a connection structure at the intersection of a water-stop steel plate in a basement corner column template and stirrups in a column, which takes into account the water-stopping requirements of a construction joint in the column and the requirements of the stirrup tensioning force on the main reinforcement in the column.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is: a high-strength steel bar closed ring is movably tied on the waterstop steel plate, the steel bar closed ring is in the shape of a long oval, and the steel bar closed ring is like a leather loop worn on a belt. The traditional method of inserting the steel bar closed ring through the gap of the main reinforcement in the column is adopted, and the waterstop steel plate with the steel bar closed ring is set at the position of the pre-formed horizontal construction joint; the stirrups in the column intersecting with the waterstop steel plate are set in the form of two semi-annular steel bars, and are set on both sides of the waterstop steel plate, and the ends of the semi-annular stirrups are tied with the steel bar closed ring inserted into the waterstop steel plate, so that the semi-annular stirrups on the outside of the waterstop steel plate, the steel bar closed ring and the semi-annular stirrups on the inside of the waterstop steel plate form a closed annular stirrup structure, that is, there is no need to open a hole in the waterstop steel plate, and the overall pulling force of the annular stirrups crossing the waterstop steel plate is guaranteed.

[0006] A connection structure at the intersection of a water-stop steel plate in a basement corner column template and a stirrup in a column, comprising a basement foundation cushion layer, a foundation raft slab casting space and a basement foundation beam casting space are arranged on the basement foundation cushion layer, a basement corner column lower casting space and a basement corner column upper casting space are arranged in sequence above the basement foundation beam casting space, a horizontal construction joint to be formed after secondary concrete pouring is arranged between the basement corner column lower casting space and the basement corner column upper casting space, a corner column inner steel bar column is vertically arranged between the foundation raft slab casting space, the basement foundation beam casting space, the basement corner column lower casting space and the basement corner column upper casting space, a 90-degree-turned water-stop steel plate is arranged in the gap of the corner column inner steel bar column at the horizontal construction joint, and a 90-degree-turned water-stop steel plate is arranged at the 9 The first steel bar closed ring and the sixth steel bar closed ring are movably mounted on the waterstop steel plate with a 0-degree turn, and a left-side semi-circular outer hoop is arranged on the left side of the waterstop steel plate with a 90-degree turn, one end of the left-side semi-circular outer hoop is connected to the first steel bar closed ring, and the other end of the left-side semi-circular outer hoop is connected to the sixth steel bar closed ring; a right-side semi-circular outer hoop is arranged on the right side of the waterstop steel plate with a 90-degree turn, one end of the right-side semi-circular outer hoop is connected to the first steel bar closed ring, and the other end of the right-side semi-circular outer hoop is connected to the sixth steel bar closed ring; the right-side semi-circular outer hoop, the first steel bar closed ring, the left-side semi-circular outer hoop and the sixth steel bar closed ring are arranged on the same horizontal plane, and together constitute an annular closed outer hoop on the steel bar column inside the corner column passing through the waterstop steel plate.

[0007] The second, third, fourth and fifth steel bar closed rings are movably arranged on the waterstop steel plate with a 90-degree turn respectively; a right semi-annular inner hoop is arranged on the right side of the waterstop steel plate with a 90-degree turn, one end of the right semi-annular inner hoop is connected to the second steel bar closed ring, and the other end of the right semi-annular inner hoop is connected to the third steel bar closed ring; a left semi-annular inner hoop is arranged on the left side of the waterstop steel plate with a 90-degree turn, one end of the left semi-annular inner hoop is connected to the second steel bar closed ring, and the other end of the left semi-annular inner hoop is connected to the third steel bar closed ring.

[0008] A front semi-annular inner hoop is arranged on the front side of the waterstop steel plate with a 90-degree turn, one end of the front semi-annular inner hoop is connected to the fourth steel bar closed loop, and the other end of the front semi-annular inner hoop is connected to the fifth steel bar closed loop, and a rear semi-annular inner hoop is arranged on the rear side of the waterstop steel plate with a 90-degree turn, one end of the rear semi-annular inner hoop is connected to the fourth steel bar closed loop, and the other end of the rear semi-annular inner hoop is connected to the fifth steel bar closed loop.

[0009] The right end of the 90-degree-turned waterstop steel plate is connected to a waterstop steel plate in the horizontal wall on the right side of the corner column, and the front end of the 90-degree-turned waterstop steel plate is connected to a waterstop steel plate in the longitudinal wall in front of the corner column.

[0010] A method for constructing a basement corner column template with stirrups on the main reinforcement passing through a water-stop steel plate, comprising a basement foundation cushion layer and a water-stop steel plate, a foundation raft slab casting space and a basement foundation beam casting space are arranged on the basement foundation cushion layer, a basement corner column lower casting space and a basement corner column upper casting space are arranged in sequence above the basement foundation beam casting space, a horizontal construction joint to be formed after secondary concrete pouring is arranged between the basement corner column lower casting space and the basement corner column upper casting space, and characterized by the following steps:

[0011] The first step is to set and tie the steel bar columns inside the corner columns on the basement foundation cushion layer, so that the upper ends of the steel bar columns inside the corner columns pass through the foundation raft slab pouring space, the basement foundation beam pouring space and the basement corner column lower pouring space in sequence, and then set them in the basement corner column upper pouring space;

[0012] Step 2: Tie the lower annular stirrups on the steel columns in the corner columns below the horizontal construction joints;

[0013] Step 3: Make a first steel bar closed ring, a second steel bar closed ring, a third steel bar closed ring, a fourth steel bar closed ring, a fifth steel bar closed ring and a sixth steel bar closed ring, and movably sleeve these steel bar closed rings on the water stop steel plate in sequence;

[0014] Step 4: Insert the water-stop steel plate with the steel bar closed ring from the right side of the horizontal construction joint into the gap between the lower pouring space of the basement corner column and the upper pouring space of the basement corner column, and make the water-stop steel plate turn 90 degrees, and then pass it out from the gap between the steel bar column in the corner column in front of the horizontal construction joint, so that the 90-degree turned water-stop steel plate can cut off the horizontal construction joint;

[0015] Step 5. Make the left semi-annular outer hoop and the right semi-annular outer hoop; tie the right semi-annular outer hoop to the outer facade of the steel bar column inside the corner column on the right side of the waterstop steel plate, pull one end of the right semi-annular outer hoop to the first steel bar closed loop, and pull the other end of the right semi-annular outer hoop to the sixth steel bar closed loop; tie the left semi-annular outer hoop to the outer facade of the steel bar column inside the corner column on the left side of the waterstop steel plate, and pull one end of the left semi-annular outer hoop to the first steel bar closed loop. The left semi-annular outer hoop reinforcement, the first steel closed ring, the right semi-annular outer hoop reinforcement and the sixth steel closed ring are arranged in the same horizontal plane and together form the annular closed outer hoop reinforcement of the steel column inside the corner column spanning the water-stop steel plate. By tightening the connection points between the semi-annular hoop reinforcement and the steel closed ring, the tightening force of the annular closed outer hoop reinforcement reaches the design tightening force requirement of the hoop reinforcement on the steel column inside the corner column;

[0016] Step 6: Tie the upper annular stirrups on the steel bars in the corner column above the horizontal construction joint;

[0017] Step 7: Set up the outer formwork system for the foundation raft slab pouring space, the basement foundation beam pouring space and the basement corner column lower pouring space. Then, pour concrete in the above spaces at one time, so that the top surface of the poured concrete is set on the horizontal plane where the horizontal construction joint is located. At this time, the lower half of the water-stop steel plate is immersed in the poured concrete.

[0018] Step 8. Support the concrete pouring formwork for the upper pouring space of the basement corner column above the waterstop steel plate, and pour concrete in the upper pouring space of the basement corner column so that the 90-degree turned waterstop steel plate can block the horizontal construction joint produced by the two concrete pourings.

[0019] The following steps are performed between the fifth and sixth steps: a right semi-circular inner hoop is arranged on the right side of the water-stop steel plate that turns 90 degrees, one end of the right semi-circular inner hoop is connected to the second steel bar closed loop, and the other end of the right semi-circular inner hoop is connected to the third steel bar closed loop; a left semi-circular inner hoop is arranged on the left side of the water-stop steel plate that turns 90 degrees, one end of the left semi-circular inner hoop is connected to the second steel bar closed loop, and the other end of the left semi-circular inner hoop is connected to the third steel bar closed loop, so that the left semi-circular inner hoop, the right semi-circular inner hoop, the second steel bar closed loop and the third steel bar closed loop are in the same horizontal plane, and form a steel bar column in the corner column. Transverse annular closed internal stirrups; a front semi-annular internal stirrup is arranged on the front side of the waterstop steel plate with a 90-degree turn, one end of the front semi-annular internal stirrup is connected with the fourth steel bar closed ring, and the other end of the front semi-annular internal stirrup is connected with the fifth steel bar closed ring; a rear semi-annular internal stirrup is arranged on the rear side of the waterstop steel plate with a 90-degree turn, one end of the rear semi-annular internal stirrup is connected with the fourth steel bar closed ring, and the other end of the rear semi-annular internal stirrup is connected with the fifth steel bar closed ring, so that the rear semi-annular internal stirrup, the front semi-annular internal stirrup, the fourth steel bar closed ring and the fifth steel bar closed ring are in the same horizontal plane, and constitute the longitudinal annular closed internal stirrups of the steel bar column in the corner column.

[0020] The present invention cleverly solves the difficult problem that the 90-degree turned waterstop steel plate in the cast-in-place concrete corner column hinders the installation of the annular closed stirrups on the main reinforcement in the column. By movably sleeved a steel bar closed ring on the waterstop steel plate, the annular closed stirrups are designed to be in the form of two-petal and half-annular stirrups, and the two-petal and half-annular stirrups are connected to the steel bar closed ring sleeved on the waterstop steel plate, thereby achieving annular closure of the two-petal and half-annular stirrups after crossing the waterstop steel plate, thereby ensuring the stirrup force of the annular stirrups on the main reinforcement in the column and the integrity of the waterstop steel plate, so that the waterstop performance of the waterstop steel plate is not destroyed. The present invention inherits the traditional insertion and setting process of the waterstop steel plate, and is simple and easy to implement on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 AA section view in the figure;

[0023] Figure 3 It is a schematic diagram of the structure of the steel bar closed loop on the water stop steel plate 8 of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the annular closed outer stirrup of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the transverse annular closed inner stirrup of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the longitudinal annular closed inner stirrup of the present invention. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings:

[0028] A connection structure at the intersection of a water-stop steel plate in a basement corner column template and a stirrup in a column, comprising a basement foundation cushion layer 1, on which a foundation raft slab pouring space 2 and a basement foundation beam pouring space 3 are arranged, above which a basement corner column lower pouring space 4 and a basement corner column upper pouring space 5 are arranged in sequence, between which a horizontal construction joint 6 to be formed after secondary concrete pouring is arranged, between which a foundation raft slab pouring space 2, a basement foundation beam pouring space 3, a basement corner column lower pouring space 4 and a basement corner column upper pouring space 5 are arranged vertically, and in the gap of the corner column inner steel bar column 7 at the horizontal construction joint 6, a water-stop steel plate 8 with a 90-degree turn is arranged, and in which a water-stop steel plate 8 with a 90-degree turn is arranged 8 are movably sleeved with a first steel bar closed ring 13 and a sixth steel bar closed ring 18 respectively; a left side semi-annular outer hoop 11 is arranged on the left side of the water-stop steel plate 8 that turns 90 degrees, one end of the left side semi-annular outer hoop 11 is connected to the first steel bar closed ring 13, and the other end of the left side semi-annular outer hoop 11 is connected to the sixth steel bar closed ring 18; a right side semi-annular outer hoop 12 is arranged on the right side of the water-stop steel plate 8 that turns 90 degrees, one end of the right side semi-annular outer hoop 12 is connected to the first steel bar closed ring 13, and the other end of the right side semi-annular outer hoop 12 is connected to the sixth steel bar closed ring 18; the right side semi-annular outer hoop 12, the first steel bar closed ring 13, the left side semi-annular outer hoop 11 and the sixth steel bar closed ring 18 are arranged on the same horizontal plane, and together constitute an annular closed outer hoop on the steel bar column 7 inside the corner column passing through the water-stop steel plate 8.

[0029] A second steel bar closed ring 14, a third steel bar closed ring 15, a fourth steel bar closed ring 16 and a fifth steel bar closed ring 17 are movably arranged on the water-stop steel plate 8 with a 90-degree turn; a right semi-annular inner hoop 22 is arranged on the right side of the water-stop steel plate 8 with a 90-degree turn, one end of the right semi-annular inner hoop 22 is connected to the second steel bar closed ring 14, and the other end of the right semi-annular inner hoop 22 is connected to the third steel bar closed ring 15; a left semi-annular inner hoop 21 is arranged on the left side of the water-stop steel plate 8 with a 90-degree turn, one end of the left semi-annular inner hoop 21 is connected to the second steel bar closed ring 14, and the other end of the left semi-annular inner hoop 21 is connected to the third steel bar closed ring 15.

[0030] A front semi-annular inner hoop 20 is arranged on the front side of the water-stop steel plate 8 with a 90-degree turn, one end of which is connected to the fourth steel bar closed ring 16, and the other end of which is connected to the fifth steel bar closed ring 17. A rear semi-annular inner hoop 19 is arranged on the rear side of the water-stop steel plate 8 with a 90-degree turn, one end of which is connected to the fourth steel bar closed ring 16, and the other end of which is connected to the fifth steel bar closed ring 17.

[0031] The right end of the 90-degree-bend waterstop steel plate 8 is connected to a waterstop steel plate 23 in the transverse wall on the right side of the corner column, and the front end of the 90-degree-bend waterstop steel plate 8 is connected to a waterstop steel plate 24 in the longitudinal wall in front of the corner column.

[0032] A method for constructing a basement corner column template with stirrups on the main reinforcement passing through a water-stop steel plate, comprising a basement foundation cushion layer 1 and a water-stop steel plate 8, a foundation raft slab pouring space 2 and a basement foundation beam pouring space 3 are arranged on the basement foundation cushion layer 1, a basement corner column lower pouring space 4 and a basement corner column upper pouring space 5 are sequentially arranged above the basement foundation beam pouring space 3, a horizontal construction joint 6 to be formed after secondary concrete pouring is arranged between the basement corner column lower pouring space 4 and the basement corner column upper pouring space 5, and characterized by the following steps:

[0033] The first step is to set and tie the steel bar column 7 in the corner column on the basement foundation cushion layer 1, so that the upper end of the steel bar column 7 in the corner column passes through the foundation raft slab pouring space 2, the basement foundation beam pouring space 3 and the basement corner column lower pouring space 4 in sequence, and then is set in the basement corner column upper pouring space 5;

[0034] Step 2: Tie the lower annular stirrups 9 on the steel bar columns 7 in the corner columns below the horizontal construction joints 6;

[0035] Step 3: Make a first steel bar closed ring 13, a second steel bar closed ring 14, a third steel bar closed ring 15, a fourth steel bar closed ring 16, a fifth steel bar closed ring 17 and a sixth steel bar closed ring 18, and movably sleeve these steel bar closed rings on the water stop steel plate 8 in sequence;

[0036] The fourth step is to insert the water-stop steel plate 8 with the steel bar closed ring from the right side of the horizontal construction joint 6 into the gap of the steel bar column 7 in the corner column between the lower pouring space 4 of the basement corner column and the upper pouring space 5 of the basement corner column, and after turning the water-stop steel plate 8 90 degrees, pass it out from the gap of the steel bar column 7 in the corner column on the front side of the horizontal construction joint 6, so that the water-stop steel plate 8 turned 90 degrees plays the role of cutting off the horizontal construction joint 6;

[0037] Step 5: Make the left semi-annular outer hoop 11 and the right semi-annular outer hoop 12; tie the right semi-annular outer hoop 11 to the outer facade of the steel bar column 7 in the corner column on the right side of the water-stop steel plate 8, pull one end of the right semi-annular outer hoop 11 together with the first steel bar closed loop 13, and pull the other end of the right semi-annular outer hoop 11 together with the sixth steel bar closed loop 18; tie the left semi-annular outer hoop 12 to the outer facade of the steel bar column 7 in the corner column on the left side of the water-stop steel plate 8, and pull one end of the left semi-annular outer hoop 12 together with the first steel bar closed loop 13. The left semi-annular outer hoop 12, the first steel closed ring 13, the right semi-annular outer hoop 11 and the sixth steel closed ring 18 are pulled together; the left semi-annular outer hoop 12, the first steel closed ring 13, the right semi-annular outer hoop 11 and the sixth steel closed ring 18 are arranged in the same horizontal plane, and together form an annular closed outer hoop of the steel column 7 in the corner column spanning the water stop steel plate 8, and by tightening the connection points of each semi-annular hoop and the steel closed ring, the tightening force of the annular closed outer hoop reaches the design tightening force requirement of the hoop on the steel column 7 in the corner column;

[0038] Step 6: Tie the upper annular stirrups 10 on the steel bar columns 7 in the corner columns above the horizontal construction joints 6;

[0039] Step 7: Support the outer formwork system of the foundation raft slab pouring space 2, the basement foundation beam pouring space 3 and the basement corner column lower pouring space 4, and then, in the above spaces, complete the concrete pouring at one time, so that the top surface of the poured concrete is set on the horizontal plane where the horizontal construction joint 6 is located; at this time, the lower half of the water stop steel plate 8 is immersed in the poured concrete;

[0040] Step 8. Support the concrete pouring template of the upper pouring space 5 of the basement corner column above the water-stop steel plate 8, and pour concrete in the upper pouring space 5 of the basement corner column, so that the 90-degree turned water-stop steel plate 8 can block the horizontal construction joint 6 generated by the two concrete pourings.

[0041] The following steps are performed between the fifth step and the sixth step: a right semi-annular inner hoop 22 is arranged on the right side of the water-stop steel plate 8 that turns 90 degrees, one end of the right semi-annular inner hoop 22 is connected to the second steel bar closed loop 14, and the other end of the right semi-annular inner hoop 22 is connected to the third steel bar closed loop 15; a left semi-annular inner hoop 21 is arranged on the left side of the water-stop steel plate 8 that turns 90 degrees, one end of the left semi-annular inner hoop 21 is connected to the second steel bar closed loop 14, and the other end of the left semi-annular inner hoop 21 is connected to the third steel bar closed loop 15, so that the left semi-annular inner hoop 21, the right semi-annular inner hoop 22, the second steel bar closed loop 14 and the third steel bar closed loop 15 are in the same horizontal plane, and constitute the steel bar column 7 in the corner column. Transverse annular closed inner stirrups; a front semi-annular inner stirrup 20 is arranged on the front side of the water-stop steel plate 8 with a 90-degree turn, one end of the front semi-annular inner stirrup 20 is connected to the fourth steel bar closed ring 16, and the other end of the front semi-annular inner stirrup 20 is connected to the fifth steel bar closed ring 15; a rear semi-annular inner stirrup 19 is arranged on the rear side of the water-stop steel plate 8 with a 90-degree turn, one end of the rear semi-annular inner stirrup 19 is connected to the fourth steel bar closed ring 16, and the other end of the rear semi-annular inner stirrup 19 is connected to the fifth steel bar closed ring 17, so that the rear semi-annular inner stirrup 19, the front semi-annular inner stirrup 20, the fourth steel bar closed ring 16 and the fifth steel bar closed ring 17 are in the same horizontal plane, and constitute the longitudinal annular closed inner stirrups of the steel bar column 7 in the corner column.

Claims

1. A connection structure at the intersection of a water-stop steel plate in a basement corner column template and a stirrup in a column, comprising a basement foundation cushion layer (1), a foundation raft slab pouring space (2) and a basement foundation beam pouring space (3) are arranged on the basement foundation cushion layer (1), a basement corner column lower pouring space (4) and a basement corner column upper pouring space (5) are arranged in sequence above the basement foundation beam pouring space (3), a horizontal construction joint (6) to be formed after secondary concrete pouring is arranged between the basement corner column lower pouring space (4) and the basement corner column upper pouring space (5), and a corner column inner steel bar column (7) is vertically arranged between the foundation raft slab pouring space (2), the basement foundation beam pouring space (3), the basement corner column lower pouring space (4) and the basement corner column upper pouring space (5), characterized in that: In the gap between the steel bar column (7) in the corner column at the horizontal construction joint (6), a 90-degree-bent waterstop steel plate (8) is provided, and a first steel bar closed ring (13) and a sixth steel bar closed ring (18) are respectively movably sleeved on the 90-degree-bent waterstop steel plate (8), and a left semi-circular outer hoop (11) is provided on the left side of the 90-degree-bent waterstop steel plate (8), one end of the left semi-circular outer hoop (11) is pulled together with the first steel bar closed ring (13), and the other end of the left semi-circular outer hoop (11) is pulled together with the sixth steel bar closed ring (18); at 9 A right side semi-annular outer hoop (12) is arranged on the right side of the 0-degree turning water-stop steel plate (8), one end of the right side semi-annular outer hoop (12) is pulled together with the first steel bar closed ring (13), and the other end of the right side semi-annular outer hoop (12) is pulled together with the sixth steel bar closed ring (18); the right side semi-annular outer hoop (12), the first steel bar closed ring (13), the left side semi-annular outer hoop (11) and the sixth steel bar closed ring (18) are arranged on the same horizontal plane, and together constitute a circular closed outer hoop on the steel bar column (7) inside the corner column passing through the water-stop steel plate (8).

2. The connection structure at the intersection of the water stop steel plate in the basement corner column formwork and the stirrups in the column according to claim 1 is characterized in that: A second steel bar closed ring (14), a third steel bar closed ring (15), a fourth steel bar closed ring (16) and a fifth steel bar closed ring (17) are movably arranged on the 90-degree-bend water-stop steel plate (8); a right semi-circular inner hoop (22) is arranged on the right side of the 90-degree-bend water-stop steel plate (8); one end of the right semi-circular inner hoop (22) is connected to the second steel bar closed ring (14), and the other end of the right semi-circular inner hoop (22) is connected to the third steel bar closed ring (15); and a left semi-circular inner hoop (21) is arranged on the left side of the 90-degree-bend water-stop steel plate (8); one end of the left semi-circular inner hoop (21) is connected to the second steel bar closed ring (14), and the other end of the left semi-circular inner hoop (21) is connected to the third steel bar closed ring (15).

3. The connection structure at the intersection of the water stop steel plate in the basement corner column formwork and the stirrups in the column according to claim 2 is characterized in that: A front semi-annular inner hoop (20) is arranged on the front side of the 90-degree-bend water-stop steel plate (8), one end of which is connected to the fourth steel bar closed ring (16), and the other end of which is connected to the fifth steel bar closed ring (17). A rear semi-annular inner hoop (19) is arranged on the rear side of the 90-degree-bend water-stop steel plate (8), one end of which is connected to the fourth steel bar closed ring (16), and the other end of which is connected to the fifth steel bar closed ring (17).

4. The connection structure at the intersection of the water stop steel plate in the basement corner column formwork and the stirrups in the column according to claim 3 is characterized in that: The right end of the 90-degree-bent waterstop steel plate (8) is connected to a waterstop steel plate (23) in the transverse wall on the right side of the corner column, and the front end of the 90-degree-bent waterstop steel plate (8) is connected to a waterstop steel plate (24) in the longitudinal wall in front of the corner column.

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