CN216194776U - Grid-shaped rotary jet grouting pile supporting structure for grouting reinforced deep foundation pit - Google Patents
Grid-shaped rotary jet grouting pile supporting structure for grouting reinforced deep foundation pit Download PDFInfo
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- CN216194776U CN216194776U CN202122321198.1U CN202122321198U CN216194776U CN 216194776 U CN216194776 U CN 216194776U CN 202122321198 U CN202122321198 U CN 202122321198U CN 216194776 U CN216194776 U CN 216194776U
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Abstract
The utility model relates to a building field provides a slip casting reinforcement formula deep basal pit grid shape spouts pile supporting construction soon, includes: the dam body is formed by arranging a plurality of jet grouting piles in a soil body on the inner side of the foundation pit in a grid mode, and at least one grouting hole is formed in the soil body in a grid opening of the dam body; the reinforcing layer covers the top end of the dam body and is fixedly connected with the top end of each jet grouting pile; and grouting concrete filled in the grouting holes. The utility model has the beneficial effects that: the soil body in the grid opening is extruded by the grouting concrete, so that the soil body is compact, and after the grouting concrete is connected with the reinforcing layer to form an integral structure, the supporting and reinforcing effects of the supporting structure on the foundation pit are greatly improved. The construction is simple, the construction cost is low, the economic benefit is good, and the method is particularly suitable for the edge reinforcement of deep foundation pits with more peripheral structures and longer excavation time in the building engineering.
Description
Technical Field
The utility model relates to the technical field of building construction, in particular to a grid-shaped jet grouting pile supporting structure of a grouting reinforced deep foundation pit.
Background
With the development of economy in China, more and more buildings need to be constructed with deep foundation pits, and for the deep foundation pits with more surrounding structures and longer excavation time, the safety of the foundation pits is the greatest importance. In order to effectively reinforce the side of a foundation pit, the form of fully distributing construction jet grouting piles below the ground inside row piles is generally adopted, soil is extruded to the periphery due to the mutual occlusion of the jet grouting piles, and the construction difficulty is caused by the high compaction degree of the soil body at the post-construction jet grouting pile. If the construction of the jet grouting piles is changed from full distribution to a grid form, although the problem that the construction is difficult due to high soil compaction degree at the post-construction jet grouting pile is solved, the number of the piles is reduced and the supporting and reinforcing effect of the jet grouting piles on the foundation pit is poor due to the fact that the jet grouting piles in the grid form are compared with the jet grouting piles in the full distribution mode.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the existing grid-type jet grouting pile supporting structure has poor foundation pit supporting and reinforcing effects, and provides a grouting reinforced deep foundation pit grid-shaped jet grouting pile supporting structure which comprises:
the dam body is formed by arranging a plurality of jet grouting piles in a soil body on the inner side of the foundation pit in a grid mode, and at least one grouting hole is formed in the soil body in a grid opening of the dam body;
the reinforcing layer covers the top end of the dam body and is fixedly connected with the top end of each jet grouting pile; and
and (5) grouting concrete, and filling the grouting holes with the concrete.
Furthermore, the grouting holes are formed in the center of grid openings of the dam body, and the central axis of each grouting hole is parallel to the central axis of each jet grouting pile.
Furthermore, the top of the grouting hole extends out of the top of the reinforcing layer, and the bottom of the grouting hole is lower than the bottom of the jet grouting pile.
The beneficial effects of the further scheme are as follows: the bottom end of the grouting hole is lower than the bottom end of the jet grouting pile, so that the bottom end elevation of the grouting concrete is lower than that of the jet grouting pile, and the reinforcing effect of the grouting concrete in the grouting hole on the supporting structure is improved.
Further, the bottom end of the grouting hole is lower than the bottom end of the jet grouting pile by at least 300 mm.
Furthermore, the elevation of the top end of the adjacent jet grouting piles is the same, and the elevation of the bottom end of the adjacent jet grouting piles is different.
Further, the reinforcing layer is a reinforced concrete layer, and the thickness of the reinforcing layer is more than or equal to 200 mm.
The utility model has the beneficial effects that: at least one grouting hole is formed in the soil body in the grid opening of the dam body, grouting concrete is arranged in the grouting hole, the soil body in the grid opening is extruded by the grouting concrete, the soil body is compacted, and after the grouting concrete is connected with the reinforcing layer to form an integral structure, the supporting and reinforcing effects of the supporting structure on the foundation pit are greatly improved. Because the supporting structure is reinforced by adopting the mode of pouring the grouting concrete into the grouting holes, the supporting structure has simple construction, low construction cost and good economic benefit, and is particularly suitable for the reinforcement of the adjacent edge of the deep foundation pit with more peripheral structures and longer excavation time in the building engineering.
Drawings
Fig. 1 is a schematic plane structure diagram of a grouting reinforced grid-shaped jet grouting pile supporting structure of a deep foundation pit according to the utility model.
Fig. 2 is a schematic elevation structure view of a-a in fig. 1.
In the figure; 1-a dam body; 11-jet grouting pile; 12-a grid port; 2-reinforcing layer; 3-grouting concrete; 4-grouting holes.
Detailed Description
The utility model is described in further detail below with reference to figures 1 to 2 and the specific embodiments.
The grouting reinforcement type deep foundation pit grid-shaped jet grouting pile supporting structure shown in fig. 1 and 2 comprises a dam body 1, a reinforcement layer 2 and grouting concrete 3.
The dam body 1 is composed of a plurality of jet grouting piles 11 arranged in the soil body on the inner side of the foundation pit in a grid mode. The elevation of the top end of the adjacent jet grouting piles 11 is the same, and the elevation of the bottom end of the adjacent jet grouting piles 11 is different. A grouting hole 4 is arranged in soil body in each grid opening 12 of the dam body 1. The bottom end of the grouting hole 4 in this embodiment is lower than the bottom end of the jet grouting pile 11 by at least 300 mm.
Of course, more grout holes 4 may be provided in each grid port 12 as desired. The injection hole 4 in this embodiment is provided at the center of the grid port 12. And the central axis of the grouting hole 4 is parallel to the central axis of the jet grouting pile 11.
The reinforcing layer 2 covers the top end of the dam body 1 and is fixedly connected with the top end of each jet grouting pile 11. I.e. the reinforcing layer 2 covers all the jet grouting piles 11. The reinforcing layer 2 of the present embodiment is preferably a reinforced concrete layer, and the thickness thereof is greater than or equal to 200 mm.
The grouting holes 4 are filled with grouting concrete 3. The grouting concrete 3 fills the grouting holes 4 and overflows out of the top end of the reinforcing layer 2. And after the grouting concrete 3 is solidified to reach the designed strength, the grouting concrete 3, the reinforcing layer 2 and the dam body 1 are connected into an integral structure.
During specific construction, the existing equipment is firstly utilized to construct the jet grouting piles 11 in a grid form, and after all the jet grouting piles 11 of the dam body 1 are constructed, the reinforcing layer 2 is constructed on the top end of the dam body 1. So that the reinforcing layer 2 covers all the jet grouting piles 11. After the construction of the reinforcing layer 2 is completed, drilling a grouting hole 4 by using drilling equipment, inserting a grouting pipe into the grouting hole 4 for grouting construction until the grouting hole 4 is filled with grout, and completing the construction of the supporting structure of the embodiment after the grouting concrete 3 in the grouting hole 4 reaches the designed strength.
The grouting concrete 3 is formed in the soil body in the grid opening 12 in a grouting mode, the soil body can be extruded to be more compact, the extrusion is carried out after the construction of the jet grouting pile 11 is completed, and the construction of the jet grouting pile 11 cannot be influenced. In addition, the construction of the grouted concrete 3 is simpler than that of the rotary jet grouting pile 11, the construction is convenient, and the solidified grouted concrete 3, the reinforcing layer 2 and the dam body 1 form an integral structure, so that the supporting and reinforcing effects of the supporting structure on the foundation pit are better.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may be made by those skilled in the art without departing from the principle of the utility model.
Claims (6)
1. The utility model provides a slip casting reinforcement formula deep basal pit grid shape spouts stake supporting construction soon which characterized in that includes:
the dam body is formed by arranging a plurality of jet grouting piles in a soil body on the inner side of the foundation pit in a grid mode, and at least one grouting hole is formed in the soil body in a grid opening of the dam body;
the reinforcing layer covers the top end of the dam body and is fixedly connected with the top end of each jet grouting pile; and
and grouting concrete, and filling the grouting holes with the concrete.
2. The grid-shaped jet grouting pile supporting structure for the grouting-reinforced deep foundation pit as claimed in claim 1, wherein the grouting holes are formed in the center of grid openings of the dam body, and the central axes of the grouting holes are parallel to the central axis of the jet grouting pile.
3. The grid-shaped jet grouting pile supporting structure for the grouting-reinforced deep foundation pit as claimed in claim 1, wherein the top ends of the grouting holes extend out of the top ends of the reinforcing layers, and the bottom ends of the grouting holes are lower than the bottom ends of the jet grouting piles.
4. The grouting-reinforced deep foundation pit grid-shaped jet grouting pile support structure according to claim 3, wherein the bottom end of the grouting hole is lower than the bottom end of the jet grouting pile by at least 300 mm.
5. The grid-shaped jet grouting pile supporting structure for the grouting-reinforced deep foundation pit as claimed in claim 1, wherein the elevation of the top ends of the adjacent jet grouting piles is the same, and the elevation of the bottom ends of the adjacent jet grouting piles is different.
6. The grouting-reinforced deep foundation pit grid-shaped jet grouting pile supporting structure according to claim 1, wherein the reinforcing layer is a reinforced concrete layer with a thickness of 200 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122321198.1U CN216194776U (en) | 2021-09-24 | 2021-09-24 | Grid-shaped rotary jet grouting pile supporting structure for grouting reinforced deep foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122321198.1U CN216194776U (en) | 2021-09-24 | 2021-09-24 | Grid-shaped rotary jet grouting pile supporting structure for grouting reinforced deep foundation pit |
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| CN216194776U true CN216194776U (en) | 2022-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116591173A (en) * | 2023-05-29 | 2023-08-15 | 中交第四航务工程局有限公司 | Construction method for DCM pile mixed foundation reinforcement for shoal silt geology |
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2021
- 2021-09-24 CN CN202122321198.1U patent/CN216194776U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116591173A (en) * | 2023-05-29 | 2023-08-15 | 中交第四航务工程局有限公司 | Construction method for DCM pile mixed foundation reinforcement for shoal silt geology |
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