CN219568962U - A connection structure that is used for lid to dig reverse construction method post-cast plate and pile foundation - Google Patents
A connection structure that is used for lid to dig reverse construction method post-cast plate and pile foundation Download PDFInfo
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- CN219568962U CN219568962U CN202320549473.1U CN202320549473U CN219568962U CN 219568962 U CN219568962 U CN 219568962U CN 202320549473 U CN202320549473 U CN 202320549473U CN 219568962 U CN219568962 U CN 219568962U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model belongs to the technical field of connection of a post-pouring plate and a pile foundation in cover-excavation reverse construction, and discloses a connection structure for the post-pouring plate and the pile foundation in cover-excavation reverse construction, wherein an embedded steel sleeve is welded in a steel reinforcement cage at the bottom of the pile foundation, and the embedded steel sleeve is hollow and cylindrical; the flange pieces are welded in the embedded steel sleeve at equal intervals, and the outer circle of the flange pieces is fixedly welded with the inner wall of the embedded steel sleeve; the left and right sides of the pile foundation main reinforcement are respectively provided with a reinforcing stirrup; the pile foundation main ribs pass through flange holes on the first flange plate, the second flange plate and the third flange plate; the stiff framework is vertically welded on the outer wall of the embedded steel sleeve at the joint of the embedded steel sleeve and the post-pouring plate. The utility model has the advantages that: 1. the shear strength of the connecting part is increased, and the construction quality of the connecting part of the post-pouring plate and the pile foundation is ensured; 2. the position of the embedded part can be accurately and rapidly positioned, and the construction efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of connection of a post-cast plate and a pile foundation in cover-excavation reverse construction method, and particularly relates to a connection structure for the post-cast plate and the pile foundation in the cover-excavation reverse construction method.
Background
The top-down construction method of the cover excavation is that the pile foundation of the main structure body is firstly constructed, then the cover plate of the structure is arranged on the guard piles and the columns, and the earth excavation and the side wall, the middle partition plate and the bottom plate lining are completed from top to bottom. The method makes the positioning of the embedded part difficult, the strength of the joint of the post-cast plate and the pile foundation insufficient, and the construction quality is difficult to guarantee.
Among the prior art, adoption pile foundation reinforcement cage in pre-buried bar chisel or pre-buried connector be connected with post-cast strip mainly exist technical problem be: the embedded part is small in size, difficult to position and difficult to chisel, and the embedded part is small in rigidity and easy to deform, meanwhile, the strength of the joint of the embedded part and the pile foundation is insufficient, and the construction quality is difficult to guarantee. The inventor develops a connection structure for a post-cast plate and a pile foundation in a top-down cover digging method based on the defects in the prior art, and can well solve the technical problems in the prior art.
The utility model aims to solve the technical problems and provides a connecting structure for a post-pouring plate and a pile foundation in a cover-excavation reverse construction method, which is simple, scientific and reasonable in design structure. The utility model creatively adopts the connecting structure of pre-embedding the connection steel pile casing and later welding the stiffening skeleton, firstly pre-embedding the connection steel pile casing along with the reinforcement cage, later adopting the field welding of the profile steel and the steel pile casing, and having strong construction operability, easy control of vertical positioning and reliable guarantee of construction quality.
Disclosure of Invention
The technical scheme adopted for solving the technical problems is as follows: a connection structure for a post-pouring plate and a pile foundation for a cover-excavation reverse construction method comprises a pile foundation 1, a post-pouring plate 2 and a reinforcement cage 3; pile foundations 1 are arranged at the left side and the right side of a post-pouring plate 2, and a reinforcement cage 3 is vertically arranged in the pile foundations 1; the embedded steel sleeve 4 is welded in the steel reinforcement cage 3 at the bottom of the pile foundation 1, and the embedded steel sleeve 4 is hollow cylindrical; the flange pieces 6 are welded in the embedded steel sleeve 4 at equal intervals, and the outer circle of the flange pieces 6 is fixedly welded with the inner wall of the embedded steel sleeve 4; the flange piece 6 is divided into a first flange piece 61, a second flange piece 62 and a third flange piece 63, wherein the first flange piece 61 is welded at the upper part of the embedded steel sleeve 4, the second flange piece 62 is welded at the middle part of the embedded steel sleeve 4, and the third flange piece 63 is welded at the bottom part of the embedded steel sleeve 4; the stiffening ribs 5 are fixedly welded on the flange plate 6 at equal intervals around the circumference of the flange plate 6, and the outer ends of the stiffening ribs 5 are fixedly welded with the inner wall of the embedded steel sleeve 4; the middle position of the flange plate 6 in the circumferential direction is provided with flange holes 7 at equal intervals; the left and right sides of the pile foundation main reinforcement 9 are respectively provided with one reinforcing stirrup 8, and the reinforcing stirrup 8 is tightly adhered to the left and right sides of the upper flange sheet I61 and the flange sheet III 63 and welded and fixed; the pile foundation main rib 9 passes through the flange holes 7 on the first flange piece 61, the second flange piece 62 and the third flange piece 63, the flange holes 7 are circular, and the diameter of the flange holes 7 is larger than that of the pile foundation main rib 9; the stiffness framework 10 is vertically welded on the outer wall of the embedded steel sleeve 4 at the joint of the embedded steel sleeve 4 and the post-pouring plate 2; the reinforcing stirrup 8 is a circumferential reinforcing stirrup of the reinforcement cage 3, and the pile foundation main reinforcement 9 is an axial stress main reinforcement of the reinforcement cage 3.
The embedded steel sleeve 4 is an annular Q235 steel plate with the wall thickness of 2-3 cm.
The stiffening ribs 5 and the flange holes 7 are staggered and arranged in a crossing way.
The stiffening rib 5 of the first flange piece 61 is fixedly welded at the lower part of the first flange piece 61, the stiffening rib 5 of the second flange piece 62 is fixedly welded at the upper side and the lower side of the second flange piece 62, and the stiffening rib 5 of the third flange piece 63 is fixedly welded at the upper part of the third flange piece 63.
The first flange piece 61, the second flange piece 62 and the third flange piece 63 are concentric with the embedded steel sleeve 4.
The reinforcing stirrup 8 is welded with the pile foundation main reinforcement 9, and the reinforcing stirrup 8 and the pile foundation main reinforcement 9 are welded with the first flange piece 61 and the third flange piece 63.
The stiff framework 10 comprises a first channel steel 101 and a second channel steel 102, wherein the first channel steel 101 and the second channel steel 102 are welded and fixed in parallel, and openings 103 are formed in the side faces of the first channel steel 101 and the second channel steel 102.
The side holes 103 of the first channel steel 101 and the second channel steel 102 are symmetrically arranged at equal intervals up and down, and the side holes 103 of the first channel steel 101 and the second channel steel 102 are symmetrically arranged correspondingly front and back.
Short steel bars are inserted into a group of holes 103 which are symmetrical in front-back and are formed in the side faces of the first channel steel 101 and the second channel steel 102, and the diameter of the holes 103 is larger than that of the short steel bars.
The other end of the stiff framework 10 is fixedly welded with the steel bars in the post-pouring plate 2.
The construction process of the connection structure for the cover-excavation reverse construction method post-pouring plate and the pile foundation comprises the following steps: the first step: the embedded part is accurately assembled, namely, a first flange piece 61 is welded at the upper position of the embedded steel sleeve 4, a second flange piece 62 is welded at the middle position of the embedded steel sleeve 4, a third flange piece 63 is welded at the bottom position of the embedded steel sleeve 4, and the outer walls of the first flange piece 61, the second flange piece 62 and the third flange piece 63 are fixedly welded with the inner wall of the embedded steel sleeve 4; and then the stiffening ribs 5 are welded at the lower part of the first flange piece 61, the upper part and the lower part of the first flange piece 62 and the lower part of the first flange piece 63, the stiffening ribs 5 play a role in fixing and reinforcing the embedded steel sleeve 4 and the flange piece 6, and the rigidity of the embedded part is improved.
And a second step of: the pile foundation main reinforcement 9 is inserted into the reserved holes 7 of the first flange piece 61, the second flange piece 62 and the third flange piece 63 in a penetrating mode, then the pile foundation reinforcing stirrup 8, the pile foundation main reinforcement 9 and the flange piece 6 are welded and fixed, and then manufacturing and installation of a pile foundation stirrup cage are completed, so that the embedded part and the reinforcement cage are integrated.
And a third step of: during construction of the post-cast plate 2, pile foundation concrete is locally chiseled out at the joint position of the post-cast plate 2 and the pre-buried steel sleeve 4 to expose the outer wall of the pre-buried steel sleeve 4, the stiff framework 10 is welded on the outer wall of the pre-buried steel sleeve 4, namely the channel steel I101 and the channel steel II 102 are symmetrically welded in parallel in front and back, and meanwhile, short steel bars are inserted into openings 103 of the front channel steel I101 and the back channel steel II 102; after the post-cast plate 2 is concreted, the pile foundation 1 and the post-cast plate 2 form a whole through the connection of the stiff framework, so that the construction quality of the pile foundation 1 and the post-cast plate 2 is improved.
The embedded steel sleeve 4 is welded in the steel reinforcement cage 3 at the bottom of the pile foundation 1, and the embedded steel sleeve 4 is hollow cylindrical; the flange pieces 6 are welded in the embedded steel sleeve 4 at equal intervals, and the outer circle of the flange pieces 6 is fixedly welded with the inner wall of the embedded steel sleeve 4. The welding arrangement through the embedded steel sleeve 4 provides a fixed welding platform for the flange plate 6 and the stiff skeleton 10. The main purpose of this arrangement is: on the one hand, through the welding setting of flange piece 6, can pass the flange hole 7 of flange piece 6 with pile foundation 1 steel reinforcement cage 3's pile foundation main muscle 9, increased stiffness skeleton 10 and steel reinforcement cage 3 fixed connection's wholeness to post-cast plate 2 has improved the intensity of being connected with the pile foundation, has improved construction quality. On the other hand, by matching the relation between the elevation of the bottom plate and the position of the pile body, the embedded part can be accurately welded at the position where the pile body is connected with the post-cast plate 2, and the embedded part can be accurately found at the position where the bottom plate is connected with the pile body during construction of the post-cast plate 2, so that the construction efficiency is improved.
The flange piece 6 is divided into a first flange piece 61, a second flange piece 62 and a third flange piece 63, the first flange piece 61 is welded at the upper position of the embedded steel sleeve 4, the second flange piece 62 is welded at the middle position of the embedded steel sleeve 4, and the third flange piece 63 is welded at the bottom position of the embedded steel sleeve 4. The main purpose of this arrangement is: on the one hand, through the connection of the flange piece 6 and the embedded steel sleeve 4, the connection of the flange piece 6, the pile foundation main reinforcement 9 and the pile foundation reinforcing stirrup 8 can enable the embedded part and the reinforcing stirrup cage 3 to form a reliable whole, and the stress of the subsequent bottom plate 2 can be transmitted to the pile foundation 1 through the embedded part; on the other hand, the flange plate 6 can be used as a stiffening plate of the embedded steel sleeve 4, so that the integral rigidity of the embedded part is improved.
The pile foundation main rib 9 penetrates through the reserved holes 7 of the first flange piece 61, the second flange piece 62 and the third flange piece 63 to form an annular circle. The main purpose of this arrangement is: the pile foundation main rib 9 passes through the reserved holes 7 of the first flange piece 61, the second flange piece 62 and the third flange piece 63, so that the position of the pile foundation main rib 9 can be accurately positioned, and the construction is convenient.
The stiff framework 10 is vertically welded on the outer wall of the embedded steel sleeve 4 at the joint of the embedded steel sleeve 4 and the post-pouring plate 2. The main purpose of this arrangement is: the post-cast plate 2 and the pile foundation 1 can form a whole through welding and fixing the stiffness framework 10 and the outer surface of the pre-buried steel sleeve 4; on the other hand, the stiffness and strength of the stiff skeleton 10 are high, so that the force applied to the post-cast slab 2 can be effectively transmitted to the pile foundation 1.
The stiff framework 10 comprises a first channel steel 101 and a second channel steel 102, wherein the first channel steel 101 and the second channel steel 102 are welded and fixed in parallel, and openings 103 are formed in the side faces of the first channel steel 101 and the second channel steel 102. The main purpose of this arrangement is: through setting up the short reinforcing bar in trompil 103, can form a whole with channel-section steel one 101 and channel-section steel two 102, make its atress in coordination, increased the area of contact of stiffness skeleton 10 and post-cast plate 2 simultaneously, make things convenient for post-cast plate 2 power transmission.
The utility model has the beneficial effects that: 1. the rigidity of the pile foundation at the joint of the post-cast plate and the pile foundation is improved through the arrangement of the pre-embedded steel sleeve, the stiffening ribs and the flange plates, the shear strength of the joint is increased, and the construction quality of the joint of the post-cast plate and the pile foundation is ensured; 2. the embedded part has larger area, the welding area of the stiff framework and the embedded part is small, and the position of the embedded part can be accurately and rapidly positioned through the relation between the elevation of the post-cast plate and the position of the pile body, so that the construction efficiency is improved.
Drawings
FIG. 1 is an elevation view of the pile foundation and the post-cast slab of the present utility model;
FIG. 2 is a partial elevation view of the junction of the pile foundation and the post-cast slab of the present utility model;
FIG. 3 is a partial side view of the junction of the pile foundation and the post-cast slab of the present utility model;
FIG. 4 is a side view of the junction of the pile foundation and the post-cast slab of the present utility model;
FIG. 5 is a diagram of the connection structure of the embedded steel sleeve and the stiff skeleton of the utility model;
FIG. 6 is a top view cross-section of the pre-buried steel sleeve and stiff skeleton connection of the present utility model;
FIG. 7 is a side cross-sectional view of the connection of the pre-buried steel sleeve and the stiff skeleton of the present utility model;
the marks in the figure: 1. pile foundation, 2, post-cast plates, 3, reinforcement cage, 4, pre-buried steel sleeve, 5, stiffening rib, 6, flange piece, 61, flange piece one, 62, flange piece two, 63, flange piece three, 7, flange hole, 8, reinforcing stirrup, 9, pile foundation main reinforcement, 10, stiffness skeleton, 101, channel steel one, 102, channel steel two, 103, trompil.
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
The utility model provides a connection structure for a post-pouring plate and a pile foundation in a cover-excavation reverse construction method, which comprises the following steps:
as shown in fig. 1 to 4, an embedded steel sleeve 4 is welded in a steel reinforcement cage 3 at the bottom of the pile foundation 1, and the embedded steel sleeve 4 is hollow and cylindrical; the flange pieces 6 are welded in the embedded steel sleeve 4 at equal intervals, and the outer circle of the flange pieces 6 is fixedly welded with the inner wall of the embedded steel sleeve 4. The welding arrangement of the embedded steel sleeve 4 provides a fixed welding platform for the flange 6 and the stiff framework 10; above-mentioned welding through flange piece 6 sets up, can pass flange hole 7 of flange piece 6 with pile foundation 1 steel reinforcement cage 3's pile foundation main muscle 9, has increased stiffness skeleton 10 and steel reinforcement cage 3 fixed connection's wholeness to post-cast plate 2 and pile foundation connection's intensity has been improved.
As shown in fig. 4, the flange 6 is divided into a first flange 61, a second flange 62 and a third flange 63, the first flange 61 is welded at the upper position of the pre-buried steel sleeve 4, the second flange 62 is welded at the middle position of the pre-buried steel sleeve 4, and the third flange 63 is welded at the bottom position of the pre-buried steel sleeve 4. The welding number of the first flange piece 61, the second flange piece 62 and the third flange piece 63 can be increased or decreased according to the height of the embedded steel sleeve 4 and the rigidity process requirement of the joint.
As shown in fig. 4, the main pile foundation rib 9 passes through the flange holes 7 of the first flange 61, the second flange 62 and the third flange 63 to form a circular ring shape. The main pile foundation rib 9 passes through the flange holes 7 of the first flange piece 61, the second flange piece 62 and the third flange piece 63, so that the integrity of the fixed connection between the reinforcement cage 3 and the embedded steel sleeve 4 of the pile foundation 1 is improved, and a stable connection structure is formed.
As shown in fig. 4 to 7, the stiffness framework 10 is vertically welded on the outer wall of the embedded steel sleeve 4 at the joint of the embedded steel sleeve 4 and the post-pouring plate 2; the welding fixation through the stiff framework 10 improves the connection firmness of the post-cast plate 2 and the pile foundation 1.
As shown in fig. 4, the stiffening rib 5 of the first flange 61 is fixedly welded at the lower position of the first flange 61, the stiffening rib 5 of the second flange 62 is fixedly welded at the upper and lower positions of the second flange 62, and the stiffening rib 5 of the third flange 63 is fixedly welded at the upper position of the third flange 63. The arrangement can improve the connection rigidity of the flange 6 and the embedded part of the embedded steel sleeve 4.
As shown in fig. 5 to 7, the stiff skeleton 10 includes a first channel steel 101 and a second channel steel 102, where the first channel steel 101 and the second channel steel 102 are welded in parallel, and openings 103 are formed in the sides of the first channel steel 101 and the second channel steel 102. The arrangement can realize the connection of the stiff frameworks 10 into a whole body by inserting the short steel bars into the openings 103 corresponding to the front and back of the channel steel I101 and the channel steel II 102, thereby improving the rigidity of the stiff frameworks 10.
As shown in fig. 5, the side openings 103 of the first channel steel 101 and the second channel steel 102 are symmetrically and equidistantly arranged. The above-mentioned arrangement holes 103 are for inserting short reinforcing bars.
As shown in fig. 5 or 6, the side openings 103 of the first channel steel 101 and the second channel steel 102 are symmetrically arranged in a front-back symmetrical manner. The short steel bars are inserted into the front-rear symmetrical holes 103, the channel steel I101 and the channel steel II 102 are connected into a whole, and the connection strength of the stiff framework 10 and the pile foundation 1 is improved after concrete is poured.
As shown in fig. 4 to 7, the connection position between the stiff skeleton 10 and the embedded steel sleeve 4 in the pile foundation 1 can be determined according to the specific connection direction between the post-cast plate 2 and the pile foundation 1; the number and type of the stiff backbones 10, i.e., the channel steel, can be increased or decreased depending on the strength of the connection.
As shown in fig. 4, a specific embodiment of the number of the flange pieces 6 welded in the pre-buried steel sleeve 4 is as follows:
in the first embodiment, the outer circle of the flange piece 6 is fixedly welded with the inner wall of the embedded steel sleeve 4, two flange pieces 6 are fixedly welded on the embedded steel sleeve 4, one of the two flange pieces is welded at the upper position in the embedded steel sleeve 4, and the other flange piece is welded at the lower position in the embedded steel sleeve 4.
In the second embodiment, the outer circle of the flange piece 6 is fixedly welded with the inner wall of the embedded steel sleeve 4, the number of flange pieces 6 fixedly welded with the embedded steel sleeve 4 is three, the first flange piece 61 is welded at the upper position of the embedded steel sleeve 4, the second flange piece 62 is welded at the middle position of the embedded steel sleeve 4, and the third flange piece 63 is welded at the bottom position of the embedded steel sleeve 4.
In the third embodiment, the outer circle of the flange 6 is fixedly welded with the inner wall of the embedded steel sleeve 4, the number of the flange 6 fixedly welded with the embedded steel sleeve 4 is five, and the flange 6 is sequentially and equidistantly welded and fixed from the upper part of the embedded steel sleeve 4 to the lower part.
The construction process of the connection structure for the cover-excavation reverse construction method post-pouring plate and the pile foundation comprises the following steps: the first step: the embedded part is accurately assembled, namely, a first flange piece 61 is welded at the upper position of the embedded steel sleeve 4, a second flange piece 62 is welded at the middle position of the embedded steel sleeve 4, a third flange piece 63 is welded at the bottom position of the embedded steel sleeve 4, and the outer walls of the first flange piece 61, the second flange piece 62 and the third flange piece 63 are fixedly welded with the inner wall of the embedded steel sleeve 4; and then the stiffening ribs 5 are welded at the lower part of the first flange piece 61, the upper part and the lower part of the first flange piece 62 and the lower part of the first flange piece 63, the stiffening ribs 5 play a role in fixing and reinforcing the embedded steel sleeve 4 and the flange piece 6, and the rigidity of the embedded part is improved.
And a second step of: the pile foundation main reinforcement 9 is inserted into the reserved holes 7 of the first flange piece 61, the second flange piece 62 and the third flange piece 63 in a penetrating manner, then the pile foundation reinforcing stirrup 8, the pile foundation main reinforcement 9 and the flange piece 6 are welded and fixed, and then the manufacturing and the installation of the pile foundation reinforcement cage are completed, so that the embedded part and the reinforcement cage are integrated.
And a third step of: during construction of the post-cast plate 2, pile foundation concrete is locally chiseled out at the joint position of the post-cast plate 2 and the pre-buried steel sleeve 4 to expose the outer wall of the pre-buried steel sleeve 4, the stiff framework 10 is welded on the outer wall of the pre-buried steel sleeve 4, namely the channel steel I101 and the channel steel II 102 are symmetrically welded in parallel in front and back, and meanwhile, short steel bars are inserted into openings 103 of the front channel steel I101 and the back channel steel II 102; after the post-cast plate 2 is concreted, the pile foundation 1 and the post-cast plate 2 form a whole through the connection of the stiff framework, so that the construction quality of the pile foundation 1 and the post-cast plate 2 is improved.
Various modifications to the embodiments described above will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A connection structure for a post-pouring plate and a pile foundation for a top-down cover digging method comprises the pile foundation, the post-pouring plate and a reinforcement cage; pile foundations are arranged at the left side and the right side of the post-pouring plate, and a reinforcement cage is vertically arranged in the pile foundations; the embedded steel sleeve is welded in a reinforcement cage at the bottom of the pile foundation, and is an annular Q235 steel plate with the wall thickness of 2-3 cm; the method is characterized in that: the embedded steel sleeve is hollow and cylindrical; the flange plates are welded in the embedded steel sleeve at equal intervals, and the outer circle of each flange plate is fixedly welded with the inner wall of the embedded steel sleeve; the flange piece is divided into a flange piece I, a flange piece II and a flange piece III, wherein the flange piece I is welded at the upper part of the embedded steel sleeve, the flange piece II is welded at the middle part of the embedded steel sleeve, and the flange piece III is welded at the bottom part of the embedded steel sleeve; the stiffening ribs are fixedly welded on the flange plate at equal intervals around the circumference of the flange plate, and the outer ends of the stiffening ribs are fixedly welded with the inner wall of the embedded steel sleeve; flange holes are formed in the middle of the flange plate in the circumferential direction at equal intervals; the left and right sides of the main pile foundation reinforcement are respectively provided with one reinforcing stirrup, and the reinforcing stirrup is tightly adhered to the left and right sides of the first flange sheet and the third flange sheet and is welded and fixed; the pile foundation main ribs penetrate through flange holes in the first flange plate, the second flange plate and the third flange plate, the flange holes are circular, and the diameter of the flange holes is larger than that of the pile foundation main ribs; the stiff framework is vertically welded on the outer wall of the embedded steel sleeve at the joint of the embedded steel sleeve and the post-pouring plate.
2. The connection structure for a top-down post-cast slab and pile foundation according to claim 1, wherein: the stiffening ribs and the flange holes are staggered in a crossing manner.
3. The connection structure for a top-down post-cast slab and pile foundation according to claim 1, wherein: the stiffening rib of the first flange plate is fixedly welded at the lower part of the first flange plate, the stiffening rib of the second flange plate is fixedly welded at the upper side and the lower side of the second flange plate, and the stiffening rib of the third flange plate is fixedly welded at the upper part of the third flange plate.
4. A connection structure for a top-down post-cast slab and pile foundation, according to claim 3, wherein: and the first flange piece, the second flange piece and the third flange piece are concentric with the embedded steel sleeve.
5. The connection structure for a top-down post-cast slab and pile foundation according to claim 1, wherein: the stiff framework comprises a first channel steel and a second channel steel, the first channel steel and the second channel steel are welded and fixed in parallel, and openings are formed in the side faces of the first channel steel and the second channel steel.
6. The connection structure for a top-down post-cast slab and pile foundation according to claim 5, wherein: the side surface holes of the first channel steel and the second channel steel are symmetrically arranged at equal intervals up and down, and the side surface holes of the first channel steel and the second channel steel are symmetrically arranged correspondingly in front-back mode.
7. The connection structure for a top-down post-cast slab and pile foundation according to claim 5, wherein: short steel bars are inserted into a group of open holes which are symmetrical in front-back manner on the side surfaces of the first channel steel and the second channel steel, and the diameter of each open hole is larger than that of each short steel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320549473.1U CN219568962U (en) | 2023-03-21 | 2023-03-21 | A connection structure that is used for lid to dig reverse construction method post-cast plate and pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320549473.1U CN219568962U (en) | 2023-03-21 | 2023-03-21 | A connection structure that is used for lid to dig reverse construction method post-cast plate and pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219568962U true CN219568962U (en) | 2023-08-22 |
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ID=87659846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320549473.1U Active CN219568962U (en) | 2023-03-21 | 2023-03-21 | A connection structure that is used for lid to dig reverse construction method post-cast plate and pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219568962U (en) |
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2023
- 2023-03-21 CN CN202320549473.1U patent/CN219568962U/en active Active
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