CN211816257U - Grouting and filling structure and reinforcing structure for non-socketed pile foundation of reinforced concrete filling - Google Patents
Grouting and filling structure and reinforcing structure for non-socketed pile foundation of reinforced concrete filling Download PDFInfo
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- CN211816257U CN211816257U CN202020026817.7U CN202020026817U CN211816257U CN 211816257 U CN211816257 U CN 211816257U CN 202020026817 U CN202020026817 U CN 202020026817U CN 211816257 U CN211816257 U CN 211816257U
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- grouting
- slip casting
- pile foundation
- pipe
- hole
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 title description 5
- 238000007569 slipcasting Methods 0.000 claims abstract description 35
- 239000004567 concrete Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 12
- 239000002002 slurry Substances 0.000 description 12
- 239000004568 cement Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The utility model relates to a reinforced concrete pours into slip casting of non-socketed pile foundation and reinforced structure, wherein, the slip casting pours into the structure and includes the foundation pile, along pile foundation circumference evenly distributed's at least three slip casting hole, place the slip casting pipe in the slip casting hole and locate the annular concrete layer between slip casting hole upper portion and the slip casting pipe, the slip casting pipe includes the steel pipe section, with the integrative colored pipe section that sets up of steel pipe section lower extreme and with the integrative taper section that sets up of colored pipe section lower extreme, the slip casting pipe with slip casting hole coaxial line just the bottom of slip casting pipe is supported on the bottom surface of slip casting hole, the bottom surface in slip casting hole is less than the pile foundation bottom surface, the top of slip casting pipe is higher than the top of pile foundation. The utility model provides a slip casting fills structure adopts and sets up the slip casting hole in pile foundation outside circumference, sets up the slip casting pipe in the slip casting hole, and the upper portion in slip casting hole sets up annular concrete layer, forms an airtight space, makes things convenient for slip casting and pressurization very much.
Description
Technical Field
The utility model relates to a building structure, concretely relates to ordinary reinforced concrete fills reinforcement of non-socketed pile foundation.
Background
With the rapid development of urban construction in China, the pile foundation is widely applied. However, in an actual engineering project, due to the diversity of geological conditions, the situation that a geological survey result is not consistent with the actual geological environment condition of the engineering and the bearing capacity of the pile foundation is insufficient after the construction of the original design scheme of the pile foundation engineering is completed due to factors such as a construction process and the like often occurs, at the moment, the pile body of the pile foundation is complete, the pile diameter and the pile length are fixed, but the bearing capacity is overestimated within a range of 10% due to the reasons. The insufficient bearing capacity of the pile foundation can cause the pile foundation engineering to have the problems of uneven settlement after construction, karst cave under the pile bottom and the like. The common reinforced concrete poured non-socketed pile foundation with the bearing capacity lower than the designed value by 10 percent is lack of a poured structure and a reinforced structure formed after pouring.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide to the pile shaft complete, because the diameter is not enough or the long not enough bearing capacity that causes of stake is less than the slip casting filling structure and the slip casting reinforced structure of the non-socketed pile foundation of ordinary reinforced concrete pouring in design value 10% within range.
In order to achieve the above purpose, the utility model discloses the scheme does:
the grouting structure of the non-socketed pile foundation of the reinforced concrete grouting comprises a foundation pile, at least three grouting holes which are uniformly distributed along the circumferential direction of the pile foundation, grouting pipes placed in the grouting holes and an annular concrete layer arranged between the upper portions of the grouting holes and the grouting pipes, wherein each grouting pipe comprises a steel pipe section, a perforated pipe section and a tapered section, the perforated pipe section and the tapered section are integrally arranged at the lower end of the steel pipe section, the grouting pipes are coaxial with the grouting holes, the bottoms of the grouting pipes are abutted to the bottom surfaces of the grouting holes, the bottom surfaces of the grouting holes are lower than the bottom surface of the pile foundation, and the tops of the grouting pipes are higher than the top of the pile foundation.
Preferably, the diameter of the grouting hole is 110cm, and the distance from the grouting hole to the outer wall of the foundation pile is 100 cm.
Preferably, the bottom surface of the grouting hole is 50cm lower than the bottom surface of the pile foundation, the wall thickness of the grouting pipe is more than or equal to 3mm, the length of the grouting pipe exceeds the height of the pile foundation by 70cm, and the upper part of the grouting pipe exceeds the pile top by 20 cm.
Preferably, the length of the flower tube section is 100cm, the inner diameter of the flower tube section is 5cm, the aperture of a grout outlet on the side wall of the flower tube is 0.5 cm-0.8 cm, and the distance between the grout outlet at the lower end part and the tube bottom of the grouting tube is 10 cm.
Preferably, the tapered section has a processing gap, and an adhesive tape layer bundled by iron wires for preventing the grouting liquid from flowing out of the tapered section is arranged on the outer surface of the tapered section.
The grouting reinforcement structure of the non-socketed pile foundation filled with reinforced concrete comprises the grouting filling structure of the non-socketed pile foundation filled with reinforced concrete and a concrete filling layer formed by filling the grouting filling structure, wherein the concrete filling layer is filled between a grouting hole and a grouting pipe, and the upper end of the concrete filling layer is connected with the annular concrete layer.
The utility model provides a slip casting fills structure adopts and sets up the slip casting hole in pile foundation outside circumference, sets up the slip casting pipe in the slip casting hole, and the upper portion in slip casting hole sets up annular concrete layer, forms an airtight space, makes things convenient for slip casting and pressurization very much. When the grouting reinforcement structure is used, cement slurry is injected into a grouting hole through a grouting pipe, air in the grouting hole escapes from a joint between the grouting hole and an annular cement layer, the cement slurry is continuously injected, the pressure of the cement slurry is increased, the hole wall and the bottom of the grouting hole are extruded, moisture and air in soil particles or rock cracks are discharged and occupy the positions of the soil particles or the rock cracks, and after a certain time, the slurry glues the original loose soil particles or cracks into a whole and forms a 'stone body' with a new structure, high strength, high waterproof performance and good chemical stability together with the grouting reinforcement structure, namely the grouting reinforcement structure.
The grouting reinforcement structure enhances the strength and integrity of soil in a local soil layer area, thereby improving the bearing capacity of the foundation pile. Especially for the common reinforced concrete pouring non-socketed pile foundation with complete pile body and bearing capacity lower than the designed value by 10% due to insufficient diameter or insufficient pile length, the reinforced structure has simple structure and convenient construction.
Drawings
Fig. 1 is a schematic view of a grouting structure in an embodiment of the present invention;
FIG. 2 is a schematic sectional view A-A of FIG. 1;
fig. 3 is a schematic view of a grouting reinforcement structure in an embodiment of the present invention.
Detailed Description
The scheme of the embodiment will be explained in detail based on the drawings
Example 1
A grouting structure for pouring non-socketed pile foundation by reinforced concrete, as shown in figure 1-2, comprises a foundation pile 1, three grouting holes 2 evenly distributed along the circumference of the pile foundation, grouting pipes 4 placed in the grouting holes and an annular concrete layer 3 arranged between the upper parts of the grouting holes and the grouting pipes, wherein each grouting pipe comprises a steel pipe section, a flower pipe section 8 integrally arranged with the lower end of the steel pipe section and a cone section 11 integrally arranged with the lower end of the flower pipe section, the grouting pipes are coaxial with the grouting holes, the bottoms of the grouting pipes are abutted against the bottom surface of the grouting holes 2, the bottom surfaces of the grouting holes are lower than the bottom surface of the pile foundation, the tops of the grouting pipes are higher than the top of the pile foundation 1, namely higher than the ground 6, the diameter of the grouting holes is 110cm and 100cm away from the outer wall of the foundation pile, the bottom surfaces of the grouting holes are lower than the bottom surface of the pile foundation by 50cm, the wall thickness of the grouting pipes is not less than 3mm, the length of the grouting pipes exceeds 70cm, the upper part of the grouting pipe exceeds 20cm of the pile top of a pile foundation, the length of the floral pipe section is 100cm, the inner diameter is 5cm, the aperture of a grout outlet 9 on the side wall of the floral pipe is 0.5 cm-0.8 cm, in the embodiment, 0.6cm is adopted, the distance between the grout outlet at the lower end part of the floral pipe and the bottom of the grouting pipe is 10cm, in the embodiment, the conical section is formed by cutting and welding the lower section of the grouting pipe and is provided with a processing gap, the grouting pipe is available in the prior art, and due to the existence of the processing gap, the bottom is easy to impact out of a pot hole in the grouting process, so that an adhesive tape layer which is bound by using iron wires and used for preventing grouting liquid from flowing out of the conical section is arranged on the outer surface of the conical section.
The slip casting of this embodiment fills the structure, adopts and sets up the slip casting hole in pile foundation outside circumference, sets up the slip casting pipe in the slip casting hole, and the upper portion in slip casting hole sets up annular concrete layer, forms an airtight space, makes things convenient for slip casting and pressurization very much. When the grouting reinforcement structure is used, cement slurry is injected into a grouting hole through a grouting pipe, air in the grouting hole escapes from a joint between the grouting hole and an annular cement layer, the cement slurry is continuously injected, the pressure of the cement slurry is increased, the hole wall and the bottom of the grouting hole are extruded, moisture and air in soil particles or rock cracks are discharged and occupy the positions of the soil particles or the rock cracks, and after a certain time, the slurry glues the original loose soil particles or cracks into a whole and forms a 'stone body' with a new structure, high strength, high waterproof performance and good chemical stability together with the grouting reinforcement structure, namely the grouting reinforcement structure.
Example 2
The grouting reinforcement structure of the non-socketed pile foundation of the reinforced concrete grouting comprises a grouting and grouting structure of the non-socketed pile foundation of the reinforced concrete grouting and a concrete filling layer 12 formed by grouting by utilizing the grouting structure, wherein the concrete filling layer is filled between a grouting hole and a grouting pipe, and the upper end of the concrete filling layer is connected with an annular concrete layer.
The grouting reinforcement structure enhances the strength and integrity of soil in a local soil layer area, thereby improving the bearing capacity of the foundation pile. Especially for the common reinforced concrete pouring non-socketed pile foundation with complete pile body and bearing capacity lower than the designed value by 10% due to insufficient diameter or insufficient pile length, the reinforced structure has simple structure and convenient construction.
The reinforcing structure is formed by the following steps:
step 1: firstly, three grouting holes 2 with the diameter of 110cm are uniformly distributed at the position of 100cm of the outer wall of the required reinforced foundation pile. Because the grouting hole is closer to the outer wall of the foundation pile, the original foundation pile structure is not needed to be damaged during construction.
Step 2: and then, driving a grouting pipe, wherein the upper part of the grouting pipe exceeds the pile top by 20cm, the bottom of the grouting pipe exceeds the pile bottom by 50cm, the total length of the required steel pipe is H +70cm, and H is the length of the pile foundation. The used grouting pipe is a DN50 steel pipe with the pipe diameter of 5cm and the wall thickness of 3mm, and the grouting pipe is inspected one by one during processing to prevent sundries and damaged and cracked pipes in the pipe. The length of the flower pipe section of the grouting pipe is 100cm, the slurry outlet aperture of the flower pipe section is 5 mm-8 mm, the length of the slurry outlet aperture is 6mm, the vertical distance is 10cm, the distance between the slurry outlet aperture at the lowest layer and the bottom of the grouting pipe is 10cm, and a packing adhesive tape is wound on the conical section of the grouting pipe and then fixed by an iron wire to form a adhesive tape layer.
And step 3: in the range between the grouting holes and the steel pipes, an annular concrete layer is formed by filling concrete downwards from the pile top and the depth of the annular concrete layer is not less than 3 m.
Then grouting, wherein the grouting pressure is 2.0-6 MPa, and the dense soil body takes a large value. The reinforcing effect can be influenced by too large or too small grouting pressure, and the pressure change of a grouting hole needs to be noticed in the specific construction process and is strictly controlled within a safety range. The load holding time requirement is as follows: the load-holding time is not less than 5min after the pressure reaches the design value, and the grouting flow is not more than 75L/min. The grouting hole cement is P.O 42.5.5-grade ordinary portland cement, and the water-cement ratio of the slurry is 0.55-0.6.
The grouting may be terminated when one of the following conditions is met:
(1) the total grouting amount and the grouting pressure both meet the design requirements;
(2) the total grouting amount reaches 75% of the design value, and the grouting pressure exceeds the design value.
In the "building foundation code", the characteristic value Ra of the vertical bearing capacity of a single pile can be estimated according to the following formula:
Ra＝qpaAp+up∑qsiali
in the formula qpa、qsiaRespectively taking characteristic values of pile end resistance and pile side resistance; a. thepIs the cross section area of the bottom end of the pile; u. ofpThe length of the periphery of the pile body is shown; liThe thickness of the ith layer of soil body.
The essence of grouting is cementing, strengthening and reinforcing. The c, phi and E values of soil in the grouting area are improved by grouting, so that the characteristic value q of pile end resistance is improvedpaAnd pile side resistance characteristic value qsiaAnd finally, the purpose of increasing the bearing capacity of the pile foundation is achieved.
Claims (6)
1. The grouting structure for pouring the non-socketed pile foundation by the reinforced concrete is characterized by comprising a foundation pile, at least three grouting holes uniformly distributed along the circumferential direction of the pile foundation, grouting pipes placed in the grouting holes and an annular concrete layer arranged between the upper parts of the grouting holes and the grouting pipes, wherein each grouting pipe comprises a steel pipe section, a perforated pipe section and a conical section, the perforated pipe section and the conical section are integrally arranged at the lower end of the steel pipe section, the grouting pipes and the grouting holes are coaxial, the bottoms of the grouting pipes abut against the bottom surfaces of the grouting holes, the bottom surfaces of the grouting holes are lower than the bottom surface of the pile foundation, and the tops of the grouting pipes are higher than the top of the pile foundation.
2. The cast-in-place structure of a non-socketed pile foundation of reinforced concrete according to claim 1, characterized in that: the diameter of the grouting hole is 110cm, and the distance from the grouting hole to the outer wall of the foundation pile is 100 cm.
3. The cast-in-place structure of a non-socketed pile foundation of reinforced concrete according to claim 2, characterized in that: the bottom surface of the grouting hole is 50cm lower than the bottom surface of the pile foundation, the wall thickness of the grouting pipe is more than or equal to 3mm, the length of the grouting pipe exceeds the height of the pile foundation by 70cm, and the upper part of the grouting pipe exceeds the pile top by 20 cm.
4. The cast-in-place structure of a non-socketed pile foundation of reinforced concrete according to claim 3, characterized in that: the length of the flower tube section is 100cm, the inner diameter of the flower tube section is 5cm, the aperture of a grout outlet on the side wall of the flower tube is 0.5 cm-0.8 cm, and the distance between the grout outlet at the lower end part and the tube bottom of the grouting tube is 10 cm.
5. The cast-in-place structure of a non-socketed pile foundation of reinforced concrete according to claim 4, characterized in that: the conical section is provided with a processing gap, and the outer surface of the conical section is provided with an adhesive tape layer which is used for preventing grouting liquid from flowing out of the conical section and is bundled by iron wires.
6. Reinforced concrete pours into slip casting reinforced structure of non-socketed pile foundation, its characterized in that: the grouting structure for pouring the non-socketed pile foundation by using the reinforced concrete as claimed in any one of claims 1 to 5, and the concrete filling layer formed by pouring the grouting structure, wherein the concrete filling layer is filled between the grouting hole and the grouting pipe, and the upper end of the concrete filling layer is connected with the annular concrete layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020026817.7U CN211816257U (en) | 2020-01-07 | 2020-01-07 | Grouting and filling structure and reinforcing structure for non-socketed pile foundation of reinforced concrete filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020026817.7U CN211816257U (en) | 2020-01-07 | 2020-01-07 | Grouting and filling structure and reinforcing structure for non-socketed pile foundation of reinforced concrete filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211816257U true CN211816257U (en) | 2020-10-30 |
Family
ID=73048946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020026817.7U Expired - Fee Related CN211816257U (en) | 2020-01-07 | 2020-01-07 | Grouting and filling structure and reinforcing structure for non-socketed pile foundation of reinforced concrete filling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211816257U (en) |
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2020
- 2020-01-07 CN CN202020026817.7U patent/CN211816257U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201030 |