CN215669531U - Row pile supporting system of prestress finish rolling screw-thread steel and H-shaped steel composite structure - Google Patents
Row pile supporting system of prestress finish rolling screw-thread steel and H-shaped steel composite structure Download PDFInfo
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- CN215669531U CN215669531U CN202120635847.2U CN202120635847U CN215669531U CN 215669531 U CN215669531 U CN 215669531U CN 202120635847 U CN202120635847 U CN 202120635847U CN 215669531 U CN215669531 U CN 215669531U
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Abstract
The utility model discloses a row pile supporting system of a prestress finish rolling deformed steel bar and H-shaped steel combined structure, which comprises a stirring pile arranged at the edge of a foundation pit, wherein H-shaped steel is inserted in the stirring pile, a web plate of the H-shaped steel extends along the direction of the foundation pit from inside to outside, finish rolling deformed steel bars are arranged on one side, away from an outer side flange, of an inner side flange of the H-shaped steel, and a crown beam is arranged at the top of the stirring pile; the lower end of the finish-rolled deformed steel bar is fixed at the lower end of the inner flange of the H-shaped steel, the upper end of the finish-rolled deformed steel bar penetrates upwards through the crown beam and then is fixed on the crown beam, and the finish-rolled deformed steel bar is in a tensioning state. The finish rolling deformed steel bars are arranged on the inner side flange of the H-shaped steel, so that the H-shaped steel can be bent towards the outside of the foundation pit in the tensioning process of the finish rolling deformed steel bars, the prestress is generated, the deformation of the H-shaped steel in the construction process of the foundation pit is reduced, the supporting quantity is reduced, the construction cost of the foundation pit is reduced, and the construction cost is reduced.
Description
Technical Field
The utility model relates to a row pile supporting system of a prestress finish rolling screw-thread steel and H-shaped steel combined structure.
Background
When the deep foundation pit is used for enclosing, the conventional enclosure pile usually adopts a cast-in-situ bored pile or a cast-in-situ immersed tube pile, and a construction method of a cast-in-situ pile in a construction site is adopted, so that a foundation trench can be excavated after concrete reaches the strength even if the construction of the enclosure pile is completely finished, and the construction efficiency is low. Therefore, the profile steel support pile can be produced at the same time, has the advantages of high installation speed, no need of maintenance, capability of playing a supporting role after the installation and the like, and is widely applied to foundation pit engineering.
The simple profile steel support pile is easy to cause water seepage and other problems, so that the common SMW construction wall is used as a protection wall of a foundation pit, and because the profile steel in the SMW construction wall has small lateral rigidity and weak deformation resistance, one or more supports are required to be arranged for preventing overlarge deformation and influencing the stability of a support structure, the construction is complicated, and meanwhile, the construction cost is increased.
SUMMERY OF THE UTILITY MODEL
In order to reduce support and reduce construction cost, the utility model provides a row pile supporting system of a prestress finish rolling deformed steel bar and H-shaped steel combined structure, which comprises a stirring pile arranged at the edge of a foundation pit, wherein H-shaped steel is inserted in the stirring pile, a web plate of the H-shaped steel extends along the direction from inside to outside of the foundation pit, finish rolling deformed steel bars are arranged on one side, away from an outer side flange, of an inner side flange of the H-shaped steel, and a crown beam is arranged at the top of the stirring pile;
the lower end of the finish-rolled deformed steel bar is fixed at the lower end of the inner flange of the H-shaped steel, the upper end of the finish-rolled deformed steel bar penetrates upwards through the crown beam and then is fixed on the crown beam, and the finish-rolled deformed steel bar is in a tensioning state.
In the present application, the inner flange of the H-section refers to a flange facing one side in the direction of the inside of the foundation pit.
In this application, the finish rolling screw-thread steel has been set up on the inside edge of a wing of H shaped steel, and carry out the stretch-draw to the finish rolling screw-thread steel, to the finish rolling screw-thread steel tensioning in-process, can make H shaped steel produce towards the outside outstanding bending of foundation ditch, and produce the prestressing force, improve the ability that H shaped steel resists the outside soil body pressure of foundation ditch, reduce the deflection of H shaped steel in the foundation ditch work progress, can guarantee to strut under the stable condition of system from this, reduce the support quantity, reduce foundation ditch construction cost, and engineering cost.
Further, in order to facilitate fixing, the upper end of the finish-rolled deformed steel bar is fixed to the crown beam via an upper anchor nut. The finish-rolled deformed steel bar can be conveniently fixed on the crown beam by utilizing the upper anchoring nut, after the finish-rolled deformed steel bar is tensioned, the upper anchoring nut is screwed to the top end of the finish-rolled deformed steel bar, and the finish-rolled deformed steel bar can be kept within a set prestress range after the upper anchoring nut is pressed on the crown beam.
Further, in order to prevent the upper anchoring nut from sinking into the crown beam and reduce the prestress of finish rolling deformed steel bar, a steel gasket is arranged between the upper anchoring nut and the crown beam in a cushioning mode.
Further, a lower anchor nut is screwed to the lower end of the finish-rolled deformed steel bar, and the lower anchor nut is welded to the lower end of the H-shaped steel bar. The design can conveniently connect the finish rolling deformed steel bar to the H-shaped steel, and avoid the damage caused when the finish rolling deformed steel bar is welded on the H-shaped steel. In addition, the lower anchoring nut can be conveniently cut off to reuse the H-shaped steel.
Furthermore, in order to avoid the influence on the tension of the finish-rolled deformed steel bar caused by the fact that the finish-rolled deformed steel bar is attached to the surface of the flange of the H-shaped steel, at least one steel support is arranged between the finish-rolled deformed steel bar and the H-shaped steel in a cushioning mode, and the steel supports are parallel to the inner flange of the H-shaped steel. Furthermore, at least two steel supports are arranged between the finish-rolled deformed steel bar and the H-shaped steel in a cushioning mode, and the at least two steel supports are arranged at intervals in the vertical direction.
Specifically, the distance between two adjacent steel supports is 200-400 mm. Within the distance range, the distance between the finish rolling deformed steel bar and the flange of the H-shaped steel can be ensured, and the smooth tensioning is ensured.
Further, the steel support is located in the area between the bottom surface of the foundation pit and the crown beam. The H-shaped steel is subjected to inward external force and is concentrated in the area of the upper portion of the bottom surface of the foundation pit, and the outward prestress of the H-shaped steel can be generated as long as the distance between the part, located at the upper portion of the bottom surface of the foundation pit, of the finish-rolled deformed steel bar and the flange of the H-shaped steel is ensured, so that the resistance of the first steel plate pile to the external soil pressure is improved.
Furthermore, in order to avoid the finish rolling deformed steel bar from being bonded on the crown beam and influencing the tensioning of the finish rolling deformed steel bar, the finish rolling deformed steel bar is sleeved with protective sleeves, and the protective sleeves penetrate through the upper side and the lower side of the crown beam.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a view along a-a in fig. 1.
Fig. 4 is a view along the direction B-B in fig. 1.
Fig. 5 is an enlarged view of a portion C in fig. 1.
Detailed Description
Referring to fig. 1-5, the row pile support system of the prestress finish rolling deformed steel bar and H-shaped steel combined structure comprises stirring piles 24 arranged at the edge of a foundation pit 30, wherein the stirring piles 24 are in overlap joint along the radial direction, H-shaped steel 11 is inserted into the stirring piles 24, a web 111 of the H-shaped steel 11 extends along the direction from inside to outside of the foundation pit, finish rolling deformed steel bars 13 are arranged on one side, away from an outer side flange 113, of an inner side flange 112 of the H-shaped steel 11, and a crown beam 21 is arranged at the top of the stirring piles 24. In fig. 1, reference numeral 100 denotes the ground.
The lower end of the finish-rolled deformed steel 13 is screwed with a lower anchor nut 12, and the lower anchor nut 12 is welded to the lower end of the side of the inner flange of the H-section that faces away from the outer flange 113. That is, the lower end of the finish-rolled deformed steel bar is fixed to the lower end of the inner flange of the H-shaped steel. The upper end of the finish-rolled deformed steel bar 13 is fixed to the crown beam 21 after passing upward through the crown beam 21, and the finish-rolled deformed steel bar is in a tensioned state.
Specifically, in the present embodiment, the upper end of the finish-rolled deformed steel 13 is fixed to the crown beam via the upper anchor nut 15, the upper anchor nut 15 is supported on the crown beam 21, and the steel gasket 14 is interposed between the upper anchor nut 15 and the crown beam 21.
And a plurality of steel supports 16 are arranged between the finish-rolled deformed steel 13 and the H-shaped steel 11 in a cushioning mode, and the steel supports 16 are parallel to the inner flange of the H-shaped steel. For clarity, the steel support 16 is shown as a black line in fig. 2 and the steel support 16 is shown as a black dot in fig. 5.
In the present embodiment in particular, the steel support 16 extends in a horizontal direction. This steel support is in order to avoid the laminating of finish rolling deformed steel bar 13 on the inboard flange of H shaped steel, has certain distance for guaranteeing to have between the inboard flange of finish rolling deformed steel bar 13 and H shaped steel, and on vertical direction, the distance control between two adjacent steel support from top to bottom is between 200 and 400mm, and specifically in this embodiment, the distance between two adjacent steel support from top to bottom is 300 mm. The steel support is only provided in the area between the foundation pit floor 31 and the crown beam 21.
In order to prevent the finish-rolled deformed steel bar from being bonded to the crown beam, a protective sleeve 23 is sleeved on the finish-rolled deformed steel bar, and the protective sleeve 23 penetrates through the upper side and the lower side of the crown beam. In this embodiment, the protective sleeve is made of a plastic tube. A horizontal brace 22 is bridged on the inner side of the crown beam 21.
During the construction of the embodiment, the following steps are carried out:
(1) the lower anchor nut 12 is welded to the lower end of the inner flange of the H-section steel, and then the lower end of the finish-rolled deformed steel bar is screwed to the lower anchor nut 12 so that the finish-rolled deformed steel bar extends toward the upper end of the H-section steel along the length direction of the H-section steel.
(2) And (5) constructing a mixing pile, namely driving the H-shaped steel carrying the finish-rolled deformed steel into the mixing pile 24 which is already constructed, and reaching the set depth.
(3) And sleeving a protective sleeve on the finish-rolled deformed steel bar, positioning the protective sleeve at the joint position of the protective sleeve and the crown beam, and then pouring the crown beam.
(4) And (4) when the strength of the crown beam reaches the set strength, performing prestress tensioning on the finish-rolled deformed steel bar, and anchoring by using an upper anchoring nut.
(5) And excavating the foundation pit and constructing the main structure.
(6) And after the main body structure is constructed above the ground, the finish-rolled deformed steel bar and the H-shaped steel bar are pulled out.
Claims (9)
1. The row pile supporting system of the prestress finish rolling deformed steel bar and H-shaped steel combined structure is characterized by comprising a stirring pile arranged at the edge of a foundation pit, wherein H-shaped steel is inserted into the stirring pile, a web plate of the H-shaped steel extends along the direction from inside to outside of the foundation pit, finish rolling deformed steel bars are arranged on one side, away from an outer side flange, of an inner side flange of the H-shaped steel, and a crown beam is arranged at the top of the stirring pile;
the lower end of the finish-rolled deformed steel bar is fixed at the lower end of the inner flange of the H-shaped steel, the upper end of the finish-rolled deformed steel bar penetrates upwards through the crown beam and then is fixed on the crown beam, and the finish-rolled deformed steel bar is in a tensioning state.
2. A row pile support system according to claim 1, characterised in that the upper end of the finish-rolled deformed steel bar is fixed to the crown beam via an upper anchor nut.
3. A row pile support system according to claim 2, characterised in that steel washers are padded between the upper anchor nuts and the crown beams.
4. A row pile support system according to claim 1, wherein the lower end of the finish-rolled deformed steel bar is screwed with a lower anchor nut, and the lower anchor nut is welded to the lower end of the H-shaped steel bar.
5. A piling support system according to claim 1, wherein at least one steel abutment is padded between the finish rolled deformed steel bar and the H-section steel, the steel abutment being parallel to the inner flange of the H-section steel.
6. A row pile support system according to claim 5, characterised in that at least two steel supports are padded between the finish-rolled deformed steel bar and the H-section steel, the at least two steel supports being spaced apart in the vertical direction.
7. The row pile support system according to claim 6, wherein the distance between two adjacent steel supports is 200-400 mm.
8. A row pile support system according to claim 5,
the steel support is located in the area between the bottom surface of the foundation pit and the crown beam.
9. A row pile support system according to claim 1, characterised in that a protective sleeve is provided over the finish rolled screw-thread steel, the protective sleeve extending through the upper and lower sides of the crown beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635847.2U CN215669531U (en) | 2021-03-29 | 2021-03-29 | Row pile supporting system of prestress finish rolling screw-thread steel and H-shaped steel composite structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635847.2U CN215669531U (en) | 2021-03-29 | 2021-03-29 | Row pile supporting system of prestress finish rolling screw-thread steel and H-shaped steel composite structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215669531U true CN215669531U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120635847.2U Active CN215669531U (en) | 2021-03-29 | 2021-03-29 | Row pile supporting system of prestress finish rolling screw-thread steel and H-shaped steel composite structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215669531U (en) |
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2021
- 2021-03-29 CN CN202120635847.2U patent/CN215669531U/en active Active
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