CN211143062U - New and old combined foundation pile in high-groundwater-level complex construction environment - Google Patents
New and old combined foundation pile in high-groundwater-level complex construction environment Download PDFInfo
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- CN211143062U CN211143062U CN201921549734.XU CN201921549734U CN211143062U CN 211143062 U CN211143062 U CN 211143062U CN 201921549734 U CN201921549734 U CN 201921549734U CN 211143062 U CN211143062 U CN 211143062U
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Abstract
The utility model is suitable for a belong to municipal works technical field, provide a new and old combination foundation pile under the complicated construction environment of high groundwater level. The utility model discloses a new and old combination foundation pile make full use of former foundation pile, only handle the stake section that goes wrong, through the protective housing when keeping former foundation pile outer wall as new foundation pile construction, make new foundation pile can be under anhydrous environment construction, and new foundation pile quality is secure. Simultaneously, this new and old combination foundation pile has avoided adopting the slow, the high scheduling problem of engineering cost of construction speed that the way that the jump bit broke away former foundation pile exists among the prior art, and is visible, the utility model discloses a new and old combination foundation pile has great spreading value.
Description
Technical Field
The utility model belongs to the technical field of municipal works, especially, relate to a new and old combination foundation pile under complicated construction environment of high groundwater level.
Background
When the strength of a large-diameter pile body of a pile foundation does not meet the requirement or the quality of the pile body does not meet the requirement, the periphery of the pile body is influenced by external factors such as land use, pipelines and the like, piles cannot be supplemented at other positions, and the piles can only be supplemented in situ, the conventional method is to break the original pile foundation by using an impact hammer, but the method has low construction speed and high construction cost.
Therefore, a new foundation pile structure is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a new and old combination foundation pile under the complicated construction environment of high groundwater level is provided, it is slow to aim at solving the construction speed that adopts the jump bit to break away the existence with former pile foundation among the prior art, problem that engineering cost is high.
The utility model discloses a realize like this, a new and old combination foundation pile under complicated construction environment of high groundwater level, including former foundation pile and new foundation pile, former foundation pile includes former stake retaining section and former stake retaining layer, former stake retaining layer is fixed in the top of former stake retaining section, have hollow space of filling in the former stake retaining layer, the top of former stake retaining section has first tenon shape connection structure; the new foundation pile comprises a new pile body, the bottom of the new pile body is provided with a second tenon-shaped connecting structure, the new pile body is embedded in the filling space, and the second tenon-shaped connecting structure is mutually embedded with the first tenon-shaped connecting structure of the original foundation pile; the side of the new pile body is fixedly connected with the original pile retaining layer through a transverse connecting reinforcing steel bar, and the bottom of the new pile body is fixedly connected with the top of the original pile retaining section through a vertically-arranged new pile reinforcing steel bar.
Further, the first tenon-shaped connecting structure comprises a first protruding tenon and a first mortise which is sunken downwards, the first tenon is located in the middle area of the bottom of the filling space, and the first mortise is located between the first tenon and the original pile retaining layer; the second tenon-shaped connecting structure comprises a convex second tenon and a downward concave second mortise; the first tenon is mutually embedded with the second mortise, and the second tenon is mutually embedded with the first mortise.
Furthermore, original pile reinforcing steel bars which vertically penetrate through the original pile retaining section and the original pile retaining layer are embedded in the original foundation pile.
Furthermore, a layer of cement-based interface agent is clamped at the joint between the original foundation pile and the new foundation pile.
Compared with the prior art, the utility model, beneficial effect lies in:
the utility model discloses major diameter pile foundation to under the complicated construction environment of high ground water level provides the foundation pile structure of new and old combination, and its make full use of former foundation pile only handles the stake section that goes wrong, through the protective housing when keeping former foundation pile outer wall as new foundation pile construction, makes new foundation pile can be under anhydrous environment construction, and new foundation pile quality is secure. Simultaneously, this new and old combination foundation pile has avoided adopting the slow, the high scheduling problem of engineering cost of construction speed that the way that the jump bit broke away former foundation pile exists among the prior art, and is visible, the utility model discloses a new and old combination foundation pile has great spreading value.
Drawings
Fig. 1 is a schematic longitudinal sectional view of a new and old combined foundation pile in a complex construction environment with a high groundwater level according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the new and old bonded foundation pile of FIG. 1;
fig. 3 is a schematic longitudinal sectional view of an original pile foundation in the new and old combined foundation pile shown in fig. 1;
fig. 4 is a schematic longitudinal sectional view of a new pile foundation in the new and old bonded foundation pile shown in fig. 1;
fig. 5 is a schematic view of the layout of the isolation holes and the splitting holes in the in-situ pile repairing method according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of 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; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; 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 in specific cases to those skilled in the art.
The utility model discloses an it is slow to solve the construction speed that adopts the jump bit to break away the former pile foundation and exist among the prior art, and the problem that engineering cost is high. Provides a new and old combined foundation pile in a complex construction environment with high underground water level.
Please refer to fig. 1 and fig. 2, which illustrate a new-old combined foundation pile provided in the present embodiment, including an original foundation pile 1 and a new foundation pile 2, and please refer to fig. 3, the original foundation pile 1 includes an original pile retaining section 11 and an original pile retaining layer 12, the original pile retaining layer 12 is fixed on the top of the original pile retaining section 11, a hollow filling space 13 is provided in the original pile retaining layer 12, and an original pile steel bar 14 vertically penetrating through the original pile retaining section 11 and the original pile retaining layer 12 is embedded in the original foundation pile 1.
The top of the original pile retaining section 11 is provided with a first tenon-shaped connecting structure. Referring to fig. 4, the new foundation pile 2 includes a new pile body 21, the bottom of the new pile body 21 has a second tenon-shaped connection structure, the new pile body 21 is embedded in the filling space 13, and the second tenon-shaped connection structure is embedded with the first tenon-shaped connection structure of the original foundation pile 1.
Specifically, the first tenon-shaped connecting structure includes a convex first tenon 111 and a downward concave first mortise 112, the first tenon 111 is located in the middle area of the bottom of the filling space 13, and the first mortise 112 is located between the first tenon 112 and the original pile retaining layer 12. The second tenon-shaped connection structure includes a second convex tenon 211 and a second concave mortise 212; the first tenon 111 and the second tenon 212 are mutually embedded, and the second tenon 211 and the first tenon 112 are mutually embedded.
The side of the new pile body 21 is fixedly connected with the original pile retaining layer 12 through the transverse connecting steel bar 2, and the bottom of the new pile body 21 is fixedly connected with the top of the original pile retaining section 11 through the vertically arranged new pile steel bar 213.
A layer of cement-based interface agent 3 is clamped at the joint between the original foundation pile 1 and the new foundation pile 2.
The embodiment also provides an in-situ pile repairing method in a complex high-groundwater-level construction environment, which comprises the following specific steps:
and S1, analyzing the position of the pile body where the defect occurs, and determining the range of the target pile section needing to be processed, wherein the position of the defect and the pile body are the target pile section needing to be processed.
S2, reserving the thickness of 15-20 cm on the outer wall of the target pile section to form an original pile reserving layer 12 to serve as a new pile protecting shell to create a waterless operation environment for the construction of the new pile foundation 2.
S3, chiseling out core area concrete inside the target pile section, and adopting the following steps:
1) referring to fig. 5, firstly, a circle of isolation holes 4 are drilled in the inner side of the original pile retaining layer 12 along the height direction of the pile body to create conditions for chiseling concrete in the core area of the original pile, and simultaneously, a new pile protection shell (namely, the original pile retaining layer 12) is prevented from being damaged during chiseling construction;
2) then, drilling a plurality of split holes 5 in the concrete of the core area along the height direction of the pile body;
3) the core area concrete is crushed using machinery or chemicals and then removed to form a fill space 13.
And S4, designing the concrete strength and the reinforcing bars of the target pile section according to the strength equivalent principle, and taking the original pile reinforcing bars of the target pile section as safe storage for ensuring safety without being included in the calculation range.
S5, arranging a first tenon-shaped connection structure at the bottom of the filling space 13, where the first tenon-shaped connection structure includes a raised first tenon 111 and a downward recessed first mortise 112, the first tenon 111 is located in the middle area of the bottom of the filling space 13, and the first mortise 112 is located between the first tenon 111 and the original pile retention layer 12; the depth of the first mortise 112 is not less than 0.5m, the diameter of the first tenon 111 is not less than 0.8m, and the first mortise 112 is excavated manually.
And S6, anchoring the new pile reinforcing steel bars 213 downwards at the bottom of the filling space 13 in a bar planting mode.
And S7, coating the cement-based interface agent 3 on the side wall and the bottom of the filling space 13.
S8, anchoring a plurality of transverse connecting steel bars 2 at the side wall of the filling space 13, arranging the plurality of transverse connecting steel bars 2 at intervals along the height direction of the original pile retaining layer 12, and anchoring the two ends of the connecting steel bars 2 into the original pile retaining layer 12 and extending into the filling space 13 by 5cm to enhance the connection between the new foundation pile 2 and the original foundation pile 1.
And S9, pouring micro-expansion concrete into the filling space 13 to form a new foundation pile 2, namely completing in-situ pile repair of the original foundation pile 1.
In summary, the present embodiment provides a new-old combined foundation pile structure and an in-situ pile-repairing method for a large-diameter pile foundation in a high groundwater level complex construction environment, which fully utilizes the original foundation pile 1, only processes a pile section with problems, and enables the new foundation pile 2 to be constructed in a waterless environment by keeping the outer wall of the original pile 1 as a protective shell when the new foundation pile 2 is constructed, so that the quality of the new foundation pile 2 is guaranteed. Meanwhile, the method avoids the problems of low construction speed, high engineering cost and the like in the method of breaking the original pile by adopting the impact hammer in the prior art, and therefore, the in-situ pile repairing method has high popularization value.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The new and old combined foundation pile under the complex construction environment with high underground water level is characterized by comprising an original foundation pile and a new foundation pile, wherein the original foundation pile comprises an original pile retaining section and an original pile retaining layer, the original pile retaining layer is fixed at the top of the original pile retaining section, a hollow filling space is formed in the original pile retaining layer, and a first tenon-shaped connecting structure is arranged at the top of the original pile retaining section; the new foundation pile comprises a new pile body, the bottom of the new pile body is provided with a second tenon-shaped connecting structure, the new pile body is embedded in the filling space, and the second tenon-shaped connecting structure is mutually embedded with the first tenon-shaped connecting structure of the original foundation pile; the side of the new pile body is fixedly connected with the original pile retaining layer through a transverse connecting reinforcing steel bar, and the bottom of the new pile body is fixedly connected with the top of the original pile retaining section through a vertically-arranged new pile reinforcing steel bar.
2. The new-old bonded foundation pile of claim 1, wherein the first tenon-shaped connection structure comprises a first tenon which is raised and a first mortise which is depressed downwards, the first tenon is located in a middle area of the bottom of the filling space, and the first mortise is located between the first tenon and the original pile retention layer; the second tenon-shaped connecting structure comprises a convex second tenon and a downward concave second mortise; the first tenon is mutually embedded with the second mortise, and the second tenon is mutually embedded with the first mortise.
3. The new-old combined foundation pile according to claim 1, wherein original pile reinforcing steel bars vertically penetrating through the original pile retaining section and the original pile retaining layer are embedded in the original foundation pile.
4. The new-old combined foundation pile of claim 1, wherein a layer of cement-based interface agent is clamped at the joint between the original foundation pile and the new foundation pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921549734.XU CN211143062U (en) | 2019-09-18 | 2019-09-18 | New and old combined foundation pile in high-groundwater-level complex construction environment |
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| CN201921549734.XU CN211143062U (en) | 2019-09-18 | 2019-09-18 | New and old combined foundation pile in high-groundwater-level complex construction environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685275A (en) * | 2019-09-18 | 2020-01-14 | 深圳市综合交通设计研究院有限公司 | New and old combined foundation pile in high-groundwater-level complex construction environment and in-situ pile repairing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685275A (en) * | 2019-09-18 | 2020-01-14 | 深圳市综合交通设计研究院有限公司 | New and old combined foundation pile in high-groundwater-level complex construction environment and in-situ pile repairing method |
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Address after: Unit 1205, block C, building 1, Xinghe legend Garden Phase III, Longtang community, Minzhi street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen comprehensive transportation and municipal engineering design and Research Institute Co.,Ltd. Address before: 518000 No.9 Tianbei 4th Road, Luohu District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TRANSPORTATION DESIGN & RESEARCH INSTITUTE Co.,Ltd. |