CN211285629U - A envelope for closing on reinforced (rfd) of foundation ditch excavation soil body of pile foundation - Google Patents
A envelope for closing on reinforced (rfd) of foundation ditch excavation soil body of pile foundation Download PDFInfo
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- CN211285629U CN211285629U CN201921994229.6U CN201921994229U CN211285629U CN 211285629 U CN211285629 U CN 211285629U CN 201921994229 U CN201921994229 U CN 201921994229U CN 211285629 U CN211285629 U CN 211285629U
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Abstract
The utility model provides a reinforced (rfd) envelope of foundation ditch excavation soil body for closing on pile foundation, be in including pile foundation and setting near the pile foundation if dry concrete interlock stake, the interlock width has between the concrete interlock stake. The utility model provides a pair of a reinforced retaining structure of foundation ditch excavation soil body for closing on pile foundation, before the foundation ditch excavation, consolidate in advance near the foundation ditch pile foundation soil body, very big reduction to the influence of pile foundation in the foundation ditch excavation in-process, guaranteed the security of pile foundation in the foundation ditch excavation in-process. In addition, the concrete occlusive pile formed by high-pressure rotary spraying plays a good water stopping role outside the foundation pit.
Description
Technical Field
The utility model relates to an engineering construction protection field especially relates to a reinforced (rfd) envelope of foundation ditch excavation soil body for closing on pile foundation.
Background
In recent years, with the rapid development of the economy of each big city, the traffic pressure is gradually increased, and each big city makes full use of underground space to build subways so as to relieve the traffic pressure problem. In station foundation ditch work progress, foundation ditch all ring edge borders is comparatively complicated, closes on all kinds of structural facilities of foundation ditch and all can receive the influence of foundation ditch excavation, especially apart from the nearer pile foundation of foundation ditch, vibration among the foundation ditch excavation process, foundation ditch excavation is all to the not hard up of the soil body around the pile foundation, all causes the influence to the stability of pile foundation, and then causes very big hidden danger to the safety of pile foundation superstructure. Moreover, because the distance between the foundation pit and the pile foundation is very short, large machinery cannot protect the pile foundation during construction.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reinforced (rfd) envelope of foundation ditch excavation soil body for closing on pile foundation carries out the enclosure to the peripheral pile foundation of foundation ditch, guarantees the safety of pile foundation.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a reinforced envelope of foundation ditch excavation soil body for closing on pile foundation, includes the concrete interlock stake that pile foundation, multirow multiseriate set up and close on the foundation of the stake and wait to dig the foundation ditch, the interlock width has between the concrete interlock stake, concrete interlock stake and surrounding soil body interlock, the concrete interlock stake sets up between foundation ditch and the pile foundation with the side of pile foundation, the concrete interlock stake with distance between the pile foundation is not less than 2 meters.
Further, the diameter of the concrete occlusive pile is not less than 300mm, the height of the concrete occlusive pile is not less than 5m, and the occlusion width is less than the radius of the concrete occlusive pile.
Further, the concrete occlusive pile adopts ultra-retarding plain concrete.
Furthermore, a fender post is arranged around the inside of the foundation pit, and the fender post close to the pile foundation is adjacent to the occlusive pile.
Furthermore, a dowel bar is arranged in the concrete secant pile, and the dowel bar is formed steel or a reinforcing steel bar.
The utility model provides a reinforced retaining structure of foundation ditch excavation soil body for closing on pile foundation, before the foundation ditch excavation, consolidate in advance near the foundation ditch pile foundation soil body, very big reduction to the influence of pile foundation in the foundation ditch excavation in-process, reduced the vibration to the pile foundation and the soil body on every side, prevent that the soil body is not hard up on every side of pile foundation, guaranteed the security of pile foundation in the foundation ditch excavation in-process. Moreover, the utility model provides a required construction site of concrete secant pile is less, can be under construction in limited construction site. In addition, the concrete occlusive pile formed by high-pressure rotary spraying plays a good water stopping role outside the foundation pit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view of the enclosure structure for reinforcing the soil body of the foundation pit excavation near the pile foundation disclosed by the utility model;
fig. 2 is a schematic view of a concrete secant pile in a retaining structure for reinforcing a foundation pit excavation soil body close to a pile foundation, disclosed by the utility model;
fig. 3 is the utility model discloses a retaining structure elevation for closing on foundation ditch excavation soil body reinforcement of pile foundation.
In the figure, 1, a pile foundation; 2. concrete secant pile; 3. the width of occlusion; 4, foundation pit; 5. and (4) enclosing piles.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, a retaining structure for reinforcing a foundation pit excavation soil body close to a pile foundation comprises a pile foundation 1, a plurality of rows and columns of concrete secant piles 2 and a foundation pit 4 to be excavated close to the pile foundation, wherein the concrete secant piles 2 are arranged in rows and columns, the secant width 3 is formed between the concrete secant piles 2, the concrete secant piles 2 are secant with the surrounding soil body, the concrete secant piles 2 are arranged between the foundation pit 4 and the pile foundation 1 and on the side surface of the pile foundation 1, and the distance between the concrete secant piles 2 and the pile foundation 1 is not less than 2 meters. The concrete secant pile can be close to the pile foundation 1 as much as possible under the condition of not damaging the stability of the pile foundation 1, so that the pile foundation is better protected.
The secant pile is arranged in a mutual secant mode between piles, the arrangement mode of the piles is that an ultra-retarding plain concrete pile (A pile) and a reinforced concrete pile (B pile) with a built-in inserted bar are arranged at intervals (constructed by a full casing drill), and the inserted bar is section steel or a steel bar. During construction, the pile A is constructed firstly, the pile B is constructed later, and the pile B is constructed before the concrete of the pile A is initially set. The piles A and the piles B are all constructed by adopting a full casing drilling machine, and the concrete at the intersection part of the adjacent piles A is cut off, so that the occlusion is realized.
The pile foundation 1 is an object to be protected, the stability of the pile foundation is prevented from being affected when a foundation pit is excavated as far as possible, and when the pile foundation 1 is not subjected to construction vibration and the surrounding soil body is not loosened, construction reinforcement is performed around the pile foundation, so that the influence on the pile foundation as small as possible is guaranteed. Because the distance between the pile foundation 1 and the foundation pit 4 is very close, the concrete secant pile is arranged between the pile foundation and the foundation pit as much as possible, and the pile foundation is protected layer by adopting a multi-row and multi-column mode. Interlock stake and high pressure jet grouting pile are prior art, the utility model provides a concrete interlock stake combines interlock stake and high pressure jet grouting pile, in the work progress, adopts rotatable jet's nozzle, utilizes the high pressure that the air compressor machine produced to spout the grout into the soil layer, makes grout and soil body mix, forms the concrete pile with the soil body interlock on every side, and a plurality of concrete pile interlocks are linked together, forms firm concrete interlock stake, protection pile basis. The distance between the pile foundation and the foundation pit is 3m-8m, the distance is very close, the requirements of large-scale mechanical construction sites cannot be met, construction cannot be carried out, the construction site required by the high-pressure jet grouting pile is small, and construction can be carried out in a limited construction site.
Furthermore, the diameter of the concrete secant pile is not less than 300mm, the pile height is not less than 5m, and the secant width 3 is less than the radius of the concrete secant pile, which is determined by engineering designers according to the actual construction situation on site.
Furthermore, guard piles 5 are arranged around the inside of the foundation pit 4. The fender post 5 is used for ensuring the stability of the foundation pit and the safety and convenience of operation in the pit.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a reinforced envelope of foundation ditch excavation soil body for closing on pile foundation, a serial communication port, concrete occlusive pile (2) that set up including pile foundation (1), multirow multiseriate and the waiting of closing on pile foundation dig foundation (4), interlock width (3) have between concrete occlusive pile (2), concrete occlusive pile (2) and surrounding soil body interlock, concrete occlusive pile (2) set up between foundation ditch (4) and pile foundation (1) with the side of pile foundation (1), concrete occlusive pile (2) with distance between pile foundation (1) is not less than 2 meters.
2. A containment structure for foundation pit excavation soil reinforcement adjacent to a pile foundation as claimed in claim 1, wherein the concrete secant pile has a diameter of no less than 300mm, a pile height of no less than 5m and a secant width (3) less than the radius of the concrete secant pile.
3. A containment structure for the reinforcement of foundation pit excavation earth near the pile foundation as claimed in claim 1, wherein the concrete secant pile (2) is made of ultra-retarded plain concrete.
4. A containment structure for the reinforcement of foundation pit excavation earth adjacent to a pile foundation according to claim 1, characterized in that a fender post (5) is provided around the inside of the foundation pit (4), the fender post (5) adjacent to the pile foundation (1) being adjacent to the secant post (2).
5. The enclosure for soil reinforcement of foundation pit excavation adjacent to a pile foundation of claim 1, wherein the concrete secant pile (2) is internally provided with a dowel, and the dowel is formed steel or a steel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921994229.6U CN211285629U (en) | 2019-11-15 | 2019-11-15 | A envelope for closing on reinforced (rfd) of foundation ditch excavation soil body of pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921994229.6U CN211285629U (en) | 2019-11-15 | 2019-11-15 | A envelope for closing on reinforced (rfd) of foundation ditch excavation soil body of pile foundation |
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| Publication Number | Publication Date |
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| CN211285629U true CN211285629U (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921994229.6U Active CN211285629U (en) | 2019-11-15 | 2019-11-15 | A envelope for closing on reinforced (rfd) of foundation ditch excavation soil body of pile foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096109A (en) * | 2020-08-27 | 2020-12-18 | 中国二十冶集团有限公司 | Construction method for newly built building reserved beside building |
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2019
- 2019-11-15 CN CN201921994229.6U patent/CN211285629U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096109A (en) * | 2020-08-27 | 2020-12-18 | 中国二十冶集团有限公司 | Construction method for newly built building reserved beside building |
| CN112096109B (en) * | 2020-08-27 | 2022-02-25 | 中国二十冶集团有限公司 | Construction method for newly built building reserved beside building |
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