CN217710737U - Curved anchor cable and steel pile combined foundation pit supporting structure - Google Patents
Curved anchor cable and steel pile combined foundation pit supporting structure Download PDFInfo
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- CN217710737U CN217710737U CN202220417878.5U CN202220417878U CN217710737U CN 217710737 U CN217710737 U CN 217710737U CN 202220417878 U CN202220417878 U CN 202220417878U CN 217710737 U CN217710737 U CN 217710737U
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Abstract
The utility model belongs to an underground structure of curve anchor rope and piling bar combination in the excavation supporting engineering. The technical scheme is as follows: the foundation pit supporting structure comprises a soil body reinforcing pile, a section steel pile, a steel cable and a jet grouting pile for anchoring; one side of the soil body reinforcing pile is a foundation pit excavation area; the anchoring jet grouting pile is positioned below the soil body reinforcing pile; the section steel pile is arranged inside the soil body reinforcing pile and is close to the excavation side of the foundation pit; the upper segment of the steel cable penetrates through the inside of the soil body reinforcing pile in an arc shape, and the upper stretching end of the steel cable is anchored at the top of the section steel pile; the lower section of the steel cable is vertically inserted into the anchor-used jet grouting pile, and the lower stretching end is anchored at the bottom of the anchor-used jet grouting pile. Wherein steel in the foundation pit supporting structure can be completely recycled and reused.
Description
Technical Field
The technology belongs to the technical field of civil engineering, is particularly used in foundation pit supporting engineering, and particularly relates to a foundation pit supporting structure combining a curved anchor cable and a steel pile.
Background
In the process of foundation pit engineering construction, a foundation pit supporting retaining wall is generally needed to be adopted as a temporary support to ensure that foundation pit excavation construction is smoothly carried out, a foundation pit supporting structure has the functions of vertical stability, micro deformation, water stop and the like, and for the foundation pit engineering of a first-layer to second-layer underground structure in a soft soil area, the conventional foundation pit supporting method has the forms of a cement soil gravity type retaining wall, a profile steel cement soil stirring wall, a cast-in-place pile row pile, a double-row pile and the like. The existing schemes have the following defects: 1. the cement soil gravity type enclosure wall has poor integrity, is only suitable for shallow foundation pits, has larger deformation and is easy to collapse; 2. the profile steel cement soil stirring wall is formed by inserting profile steel into a soil body reinforcing pile, wherein the profile steel can be recycled, and a pit inner support or an oblique anchor cable is generally required to be arranged in a foundation pit excavation area in a matched mode; 3. the cast-in-place pile has higher pile arranging cost, all materials can not be recycled, and the cast-in-place pile becomes an underground obstacle after construction is finished and is generally required to be provided with an in-pit support or an oblique anchor cable; 4. the underground structure construction efficiency is influenced by the in-pit support system, and most projects are difficult to implement due to the fact that the oblique anchor cables exceed the red line of land. Due to the reasons, the comprehensive cost of the foundation pit supporting engineering is high, the material waste is serious, and the energy conservation and the environmental protection are not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a curved anchor rope reaches with the underground structure of piling bar combination, but wherein steel complete recovery reuse among the underground structure.
The technical scheme of the utility model is that: a foundation pit supporting structure combining a curve anchor cable and a steel pile comprises a soil body reinforcing pile, a section steel pile, a steel cable and a jet grouting pile for anchoring; one side of the soil body reinforcing pile is a foundation pit excavation area; the anchor jet grouting pile is positioned below the soil body reinforcing pile; the section steel pile is arranged inside the soil body reinforcing pile and is close to the excavation side of the foundation pit; the upper segment of the steel cable penetrates through the inside of the soil body reinforcing pile in an arc shape, and the upper stretching end of the steel cable is anchored at the top of the section steel pile; the lower section of the steel cable is vertically inserted into the anchor-used jet grouting pile, and the lower stretching end is anchored at the bottom of the anchor-used jet grouting pile. The soil body reinforcing pile has the function of improving the bearing capacity of the soil body on the inner side of the curve so as to transmit the pressure of the curve anchor cable on the inner side to the deep soil body.
Based on the technical characteristics: the steel cable is anchored at the bottom of the anchor jet grouting pile through a first anchor, and the lower section of the steel cable and the first anchor are positioned on the central line of the anchor jet grouting pile.
Based on the technical characteristics: welding an anchorage device bracket on the side surface of the top of the section steel pile; the upper stretching end of the steel cable is provided with a second anchorage device which is fixed on the anchorage device bracket.
Based on the technical characteristics: the width of the anchorage device bracket is larger than the width of the flange of the section steel pile, and a pore passage through which the steel cable passes is reserved in the end part area beyond the width range of the flange, so that the steel cable bypasses from two sides of the section steel pile.
Based on the technical characteristics: a plurality of steel sleeves are embedded in arc-shaped pore channels in the soil body reinforcing pile in sections, and a steel cable penetrates through the middle of each steel sleeve. The steel sleeve has the function of dispersing pressure which is generated by the curve on the hole wall soil body and points to the direction of the circle center.
Based on the technical characteristics: and step two, placing a steel sleeve in the arc-shaped pore canal, and enabling the steel cable to penetrate through the middle of the steel sleeve.
In the technical scheme, the soil body reinforcing pile is the existing mature technology, and the common pile types are a high-pressure jet grouting pile and a cement soil mixing pile; the soil body reinforcing pile belongs to a stressed secondary structure, mainly has the main functions of being used as a waterproof curtain for stopping water and facilitating resistance reduction when the section steel pile is inserted into soil, and soil and cement paste are stirred into paste during construction and then the section steel is conveniently inserted.
The beneficial effects of the utility model include: 1. high-value steel in the foundation pit supporting structure can be recycled; 2. an in-pit support system can be omitted, the construction cost is reduced, and the construction convenience is improved; 3. the anchoring jet grouting pile and the steel cable are vertically arranged, so that the anchoring jet grouting pile does not exceed the red line range of land, is not influenced by the land use range, and is convenient to implement.
The structure can realize complete recovery of steel in the foundation pit supporting structure, on the premise that the anchor cable does not exceed a ground red line, a tensile force which is obliquely directed to the outside of the pit is formed, the deformation of a soil body and the deformation of the top of the profile steel pile are controlled, the high-strength advantage of the steel strand as a tension member is fully exerted, and the using amount of the steel in the foundation pit supporting engineering is reduced.
Drawings
Fig. 1 is an overall installation diagram of the present invention.
Fig. 2 is a detailed diagram of node a.
Fig. 3 is a B-B cross-sectional view of the a node.
Fig. 4 is a detailed view of the arcuate channel.
The reference numbers in the figures: 1 is the shaped steel pile, 11 is the ground tackle bracket, 2 is the cable wire, 21 is first ground tackle, 22 is the anchor with the jet grouting stake, 23 is steel casing pipe, 24 is the second ground tackle, 3 is soil body reinforcement stake.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, a foundation pit excavation area C is arranged on the right side of the soil body reinforcing pile 3, and a steel section pile 1 and a steel cable 2 are arranged in the soil body reinforcing pile 3; the section steel pile 1 is positioned close to the excavation side of the foundation pit; the bottom end, namely the lower stretching end, of the steel cable 2 is anchored through a first anchor 21, and the lower section of the steel cable 2 and the first anchor 21 are positioned in the center of a jet grouting pile 22 for anchoring; the upper section of the steel cable 2 is provided with an arc-shaped section, and the upper end of the steel cable is anchored with the top of the section steel pile 1.
As shown in fig. 1, the soil body reinforcing pile 3 may be a soil body reinforcing pile 3 with a diameter of 700mm, a pile spacing of 500mm and an overlapping of 200mm, two rows of soil body reinforcing piles are arranged on one side close to the excavation area C of the foundation pit, the pile length is 15m, the pile lengths of the remaining soil body reinforcing piles are 10m, and the soil body reinforcing pile 3 is long in the front and short in the back. A first anchorage device 21 is arranged at the bottom end of the steel cable 2 in the jet grouting pile 22 for anchoring, and if the first anchorage device 21 is a finished recoverable anchoring device, the steel cable 2 can be recovered; the anchor-use jet grouting pile 22 may be a high-pressure jet grouting pile having a pile diameter of 400mm to 800mm, wherein the pile diameter at the end is 800mm, and the pile diameter at the middle section is 400mm. The section steel piles 1 are hot-rolled H-shaped steel and 15m in length, and the section steel piles 1 are inserted into the front two rows of cement soil mixing piles of the soil body reinforcing pile 3.
An anchorage device bracket 11 is welded on the side surface of the top of the section steel pile 1; the top tensioning end of the steel cable 2 is provided with a second anchorage 24, and the second anchorage 24 is fixed on the anchorage bracket 11. The width of the anchorage device bracket 11 is larger than the width of the flange of the section steel pile 1, and a pore passage through which the steel cable 2 passes is reserved in the end part area beyond the width range of the section steel pile 1, so that the steel cable 2 bypasses from two sides of the section steel pile 1.
As shown in fig. 2 and 3, the anchor bracket 11 is a triangular pipe shape formed by bending or splicing and welding steel plates, and the thickness of the steel plates is 16mm; the width of the anchorage bracket 11 is 500mm, and a hole is reserved for the steel cable 2 at the end part area beyond the width range of the flange of the section steel pile 1. The steel cable 2 is a steel strand with the diameter of 15.24mm, the number of the steel strands is determined according to foundation pit supporting calculation, a second anchorage device 24 is arranged at the top tensioning end, the second anchorage device 24 is sleeved by adopting a rectangular clamping piece type anchorage device, the second anchorage device 24 is fixed on the anchorage device bracket 11, the steel cable 2 is wound around from two sides of the section steel pile 1, penetrates through a pore channel of the anchorage device bracket 11 and is anchored by the second anchorage device 24.
A plurality of steel sleeves 23 are embedded in arc-shaped pore channels in the soil body reinforcing piles 3 in a segmented mode, and the steel cable 2 penetrates through the middle of each steel sleeve 23.
As shown in FIG. 4, the steel sleeve 23 is a steel pipe with a diameter of 140mm and a wall thickness of 8mm, each section is 0.5m, and the steel pipe is placed into the arc-shaped pore canal section by section.
All the components can be connected, disassembled and loaded through common equipment for construction; referring to fig. 1 to 3, the construction and installation technicians in this field can easily perform the operation.
The embodiment of the construction method of the utility model is described as follows:
the method comprises the following steps: and constructing the soil body reinforcing pile 3, and inserting the section steel pile 1 into the liquid pile body of the soil body reinforcing pile 3.
Step two: after the soil body reinforcing pile 3 reaches the design strength, namely after the soil body reinforcing pile 3 reaches the drillable strength, drilling holes in the soil body reinforcing pile 3 by adopting curve drilling construction equipment on two sides of the section steel pile 1, and placing a steel sleeve 23 in the arc-shaped pore channel; inserting a grouting pipe at the position of the anchor-used jet grouting pile 22, and placing a first anchor 21; the upper section of the steel cable 2 is inserted into the arc-shaped pore canal, and the lower stretching end of the steel cable 2 is anchored with the first anchorage device 21; the grouting pipe is used for injecting grout, the anchor-use jet grouting pile 22 is constructed, and the grouting pipe is pulled out while grouting.
Step three: after the jet grouting pile 22 for anchoring reaches the design strength, namely the jet grouting pile 22 for anchoring reaches the designed compressive strength value, an anchor bracket 11 and a second anchor 24 are installed at the top of the section steel pile 1, and the upper tensioning end of the steel cable 2 is tensioned and anchored to the second anchor 24.
Step four: and (5) excavating a soil body of the excavation area C of the foundation pit, and constructing a basement structure.
Step five: after the construction of the basement structure is completed and the foundation pit is backfilled, the second anchorage device 24 is loosened, and when the first anchorage device 21 adopts the condition of a recyclable device, the recycling steel cable 2 is drawn out.
Step six: and (3) pulling out the steel pile 1, and filling the pulled-out pore channel in a slurry irrigation mode to finish foundation pit construction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides a foundation ditch supporting construction of curve anchor rope and piling bar combination which characterized in that: comprises a soil body reinforcing pile (3), a section steel pile (1), a steel cable (2) and a jet grouting pile (22) for anchoring; one side of the soil body reinforcing pile (3) is a foundation pit excavation area (C); the anchoring jet grouting pile (22) is positioned below the soil body reinforcing pile (3); the section steel pile (1) is arranged inside the soil body reinforcing pile (3) and is close to the excavation side of a foundation pit; the upper section of the steel cable (2) is in an arc shape and penetrates through the soil body reinforcing pile (3), and the upper stretching end of the steel cable is anchored at the top of the section steel pile (1); the lower section of the steel cable (2) is vertically inserted into the anchoring jet grouting pile (22), and the lower stretching end is anchored at the bottom of the anchoring jet grouting pile (22).
2. The curved anchor cable and steel pile combined foundation pit supporting structure according to claim 1, wherein: the steel cable (2) is anchored at the bottom of the anchoring jet-grouting pile (22) through a first anchor (21), and the lower section of the steel cable (2) and the first anchor (21) are positioned on the central line of the anchoring jet-grouting pile (22).
3. The curved anchor cable and steel pile combined foundation pit supporting structure according to claim 1, wherein: an anchorage device bracket (11) is welded on the side face of the top of the section steel pile (1); and a second anchorage device (24) is arranged at the upper tensioning end of the steel cable (2), and the second anchorage device (24) is fixed on the anchorage device bracket (11).
4. The foundation pit supporting structure of curved anchor rope and steel pile combination of claim 3, characterized in that: the width of the anchorage device bracket (11) is larger than the width of a flange of the section steel pile (1), and a pore passage through which the steel cable (2) passes is reserved in an end part area beyond the width range of the flange, so that the steel cable (2) bypasses from two sides of the section steel pile (1).
5. The foundation pit supporting structure of curved anchor rope and steel pile combination of claim 1, characterized in that: a plurality of steel sleeves (23) are embedded into arc-shaped tunnels in the soil body reinforcing pile (3) in sections, and the steel cable (2) penetrates through the middle of the steel sleeves (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220417878.5U CN217710737U (en) | 2022-02-22 | 2022-02-22 | Curved anchor cable and steel pile combined foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220417878.5U CN217710737U (en) | 2022-02-22 | 2022-02-22 | Curved anchor cable and steel pile combined foundation pit supporting structure |
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| Publication Number | Publication Date |
|---|---|
| CN217710737U true CN217710737U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220417878.5U Active CN217710737U (en) | 2022-02-22 | 2022-02-22 | Curved anchor cable and steel pile combined foundation pit supporting structure |
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| Country | Link |
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| CN (1) | CN217710737U (en) |
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- 2022-02-22 CN CN202220417878.5U patent/CN217710737U/en active Active
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