CN216075058U - Gravel cement mixing pile composite foundation structure - Google Patents
Gravel cement mixing pile composite foundation structure Download PDFInfo
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- CN216075058U CN216075058U CN202122625429.8U CN202122625429U CN216075058U CN 216075058 U CN216075058 U CN 216075058U CN 202122625429 U CN202122625429 U CN 202122625429U CN 216075058 U CN216075058 U CN 216075058U
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- cement mixing
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- foundation structure
- composite foundation
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- 239000004568 cement Substances 0.000 title claims abstract description 44
- 238000002156 mixing Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000004575 stone Substances 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000005056 compaction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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Abstract
The utility model relates to a gravel cement mixing pile composite foundation structure, which comprises a plurality of combined pile bodies vertically arranged in a soft soil foundation and gravel mattress layers arranged above the combined pile bodies; the combined pile body comprises two gravel piles arranged at intervals and a cement stirring pile arranged between the gravel piles, and the cement stirring pile and the gravel piles are connected into a whole. According to the gravel cement mixing pile composite foundation structure provided by the utility model, the cement mixing pile part in the combined pile body can improve the bearing capacity of the foundation, and the gravel pile part can form a drainage channel. Compared with the existing single soft soil foundation treatment structure, the gravel cement mixing pile composite foundation structure has the advantages of better soft soil foundation treatment effect and lower construction cost.
Description
Technical Field
The utility model relates to the technical field of soft soil foundation treatment, in particular to a gravel cement mixing pile composite foundation structure.
Background
The silt soft soil foundation is frequently touched during engineering construction, the thickness change of the silt soft soil foundation is large, and the silt soft soil foundation has the characteristics of high water content, high sensitivity, large porosity, high compressibility, low strength and the like. The foundation has low bearing capacity, slow strength increase, easy deformation and nonuniformity after loading, large deformation rate, long stabilization time, small permeability, high thixotropy and rheological property, and can not be used for building structures on the ground surface.
In order to enhance the overall stability of the silt soft soil foundation and enable the deformation and the bearing capacity of the silt soft soil foundation to meet the use requirements of engineering design, the silt soft soil foundation needs to be treated. At present, the common treatment methods for silt soft soil foundation include an in-hole deep layer dynamic compaction method, a pad replacement method, a dynamic compaction method, a sand-stone pile method, a vibroflotation method, a cement-soil stirring method, a high-pressure injection grouting method, a prepressing method, a rammed cement-soil pile method, a cement fly ash gravel pile method, a lime-soil compaction pile method and a soil compaction pile method, a column hammer impact pile-expanding method, a single-liquid silicification method, an alkali-liquid method and the like. However, the use of a single treatment process for a site with special requirements has its limitations and economic performance is not high.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a gravel cement mixing pile composite foundation structure to solve the technical problems in the prior art.
According to the utility model, a gravel cement mixing pile composite foundation structure is provided, which comprises a plurality of combined pile bodies vertically arranged in a soft soil foundation and gravel mattress layers arranged above the combined pile bodies; wherein,
the combined pile body comprises two gravel piles arranged at intervals and a cement stirring pile arranged between the gravel piles, and the cement stirring pile is connected with the two gravel piles into a whole.
Preferably, a geogrid is arranged in the gravel cushion layer, and the geogrid is arranged in the middle of the gravel cushion layer in the thickness direction.
Preferably, the thickness of the gravel cushion layer is 400-600 mm.
Preferably, a plurality of the combined piles are uniformly distributed in the soft soil foundation.
Preferably, the distance between two adjacent combined pile bodies is 1500-2000 mm.
Preferably, two sides of the gravel cushion layer are respectively and symmetrically provided with a drainage blind ditch.
Preferably, the upper part of the drainage blind ditch is provided with a graded broken stone filter layer.
Preferably, the graded broken stone filter layer comprises a stone block layer, a pebble layer and a coarse sand layer which are arranged in sequence from bottom to top.
Preferably, a steel grating is arranged in the middle of the drainage blind ditch, and the graded broken stone filtering layer is arranged above the steel grating.
Preferably, the graded crushed stone filter layer has an upper surface flush with an upper surface of the crushed stone mattress layer.
The utility model provides a gravel cement mixing pile composite foundation structure which comprises a plurality of combined pile bodies consisting of gravel piles and cement mixing piles, wherein the combined pile bodies are arranged in a soft soil foundation, the cement mixing piles can improve the bearing capacity of the foundation, and the gravel piles can form a drainage channel. Compared with the existing single soft soil foundation treatment structure, the gravel cement mixing pile composite foundation structure has the advantages of better soft soil foundation treatment effect and lower construction cost.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a sand cement mixing pile composite foundation structure according to an embodiment of the utility model.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 shows a layout of combined piles in the sand cement mixing pile composite foundation structure according to the embodiment of the utility model.
In the figure: the combined pile comprises a combined pile body 1, a sand-stone pile 11, a cement mixing pile 12, a broken stone mattress layer 2, a geogrid 21, a drainage blind ditch 3, a graded broken stone filtering layer 4, a stone layer 41, a pebble layer 42, a coarse sand layer 43, a steel grid 5 and a soft soil foundation 6.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
Referring to fig. 1, the present invention provides a gravel cement mixing pile composite foundation structure, which comprises a plurality of combined pile bodies 1 vertically arranged in a soft soil foundation 6, and a gravel cushion layer 2 arranged above the combined pile bodies 1; wherein, combination pile body 1 includes two gravel piles 11 that the interval set up, and locates two cement stirring stake 12 between gravel pile 11, cement stirring stake 12 and two gravel pile 11 is even as an organic whole.
As shown in fig. 3, a layout of the composite pile 1 in the soft soil foundation 6 is shown, and a plurality of the composite pile 1 are uniformly distributed in the soft soil foundation 6. Wherein, the distance between two adjacent combined pile bodies 1 is 1500 mm-2000 mm.
This grit cement stirring stake composite foundation structure, the combination pile body 1 of setting in soft soil foundation 6 is formed by two grit piles 11 and the combination of a cement stirring stake 12, and two grit piles 11 partly structure relative each other and cement stirring stake 12 stir together, and the consolidation bears, has improved soft soil foundation 6's bearing capacity, and grit pile 11 part can form drainage channel, is favorable to the drainage, has improved the soil property. Compare in adopting single soft soil foundation 6 processing structure, this grit cement stirring stake composite foundation structure is better to soft soil foundation 6's treatment effect, and construction cost is lower.
The gravel mattress layer 2 arranged above the combined pile body 1 is formed by paving gravel, has good water permeability, can quickly permeate surface water and is discharged into the ground through the gravel pile 11 part, thereby preventing water from being stored on the upper part of the soft soil foundation 6 and simultaneously ensuring that the ground surface part has better bearing capacity.
Further, a geogrid 21 is arranged in the gravel cushion layer 2, and the geogrid 21 is arranged in the middle of the gravel cushion layer 2 in the thickness direction. The geogrid 21 can help the broken stone mattress layer 2 to increase the bearing capacity, effectively prolong the service life of the broken stone mattress layer 2, and can also effectively prevent the broken stone mattress layer 2 from collapsing and other phenomena, so that the ground surface can be kept beautiful and flat. The construction quality of the geogrid 21 must meet the construction requirements specified in the design construction drawing, and the phenomena of wrinkling, overlapping, twisting and the like cannot occur in the construction process, and the geogrid 21 also needs to be kept in a tightened state so as to be capable of uniformly bearing force. The thickness of rubble mattress layer 2 is 400 ~ 600mm to guarantee that foundation structure surface has higher bearing capacity, in this embodiment, the thickness of rubble mattress layer 2 is 600 mm.
Furthermore, two sides of the gravel cushion layer 2 are respectively and symmetrically provided with a drainage blind ditch 3. Through setting up drainage french drain 3, when the more too late infiltration of water on rubble mattress bed course 2 surface to the underground, the drainage french drain 3 of both sides is gone into to the surface of accessible rubble mattress bed course 2, drains away unnecessary water through drainage french drain 3.
Further, a graded broken stone filter layer 4 is arranged at the upper part of the drainage blind ditch 3. The graded broken stone filtering layer 4 can filter impurities, and before water on the surface of the broken stone mattress layer 2 is drained into the drainage blind ditch 3, the graded broken stone filtering layer 4 can filter impurities in the water, so that the impurities are prevented from entering the drainage blind ditch 3 to cause the blockage of the drainage blind ditch 3, and the drainage efficiency is influenced. As shown in fig. 2, in the present embodiment, the graded crushed stone filter layer 4 includes a stone layer 41, a pebble layer 42, and a coarse sand layer 43 which are arranged in this order from bottom to top.
In order to conveniently arrange a graded broken stone filter layer 4 on the upper part of the drainage blind ditch 3, the middle part of the drainage blind ditch 3 is provided with a steel grating 5, the graded broken stone filter layer 4 is arranged above the steel grating 5, and the steel grating 5 is subjected to hot dip galvanizing treatment, so that the corrosion resistance is improved, and the service life is prolonged. In this embodiment, two side walls of the blind drain 3 are provided with L-shaped notches, and the steel grating 5 is placed at the L-shaped notches at the two sides.
In this embodiment, the upper surface of the graded broken stone filter layer 4 is flush with the upper surface of the broken stone mattress layer 2, so that the surface of the foundation structure is flat and beautiful.
In conclusion, the gravel cement mixing pile composite foundation structure provided by the utility model comprises a plurality of combined pile bodies which are arranged in a soft soil foundation and are composed of gravel piles and cement mixing piles, wherein the cement mixing piles can improve the bearing capacity of the foundation, and the gravel piles can form a drainage channel. Compared with the existing single soft soil foundation treatment structure, the gravel cement mixing pile composite foundation structure has the advantages of better soft soil foundation treatment effect and lower construction cost.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the scope of the utility model.
Claims (10)
1. A gravel cement mixing pile composite foundation structure is characterized by comprising a plurality of combined pile bodies vertically arranged in a soft soil foundation and gravel mattress layers arranged above the combined pile bodies; wherein,
the combined pile body comprises two gravel piles arranged at intervals and a cement stirring pile arranged between the gravel piles, and the cement stirring pile is connected with the two gravel piles into a whole.
2. The gravel cement mixing pile composite foundation structure according to claim 1, wherein a geogrid is provided in the gravel cushion layer, and the geogrid is provided at an intermediate position in the thickness direction of the gravel cushion layer.
3. The gravel cement mixing pile composite foundation structure of claim 2, wherein the thickness of the gravel cushion layer is 400-600 mm.
4. A gravel cement mixing pile composite foundation structure according to claim 1, wherein a plurality of the combined pile bodies are evenly distributed in the soft soil foundation.
5. The gravel cement mixing pile composite foundation structure of claim 4, wherein the distance between two adjacent combined pile bodies is 1500 mm-2000 mm.
6. The gravel cement mixing pile composite foundation structure of claim 1, wherein a drainage blind ditch is symmetrically arranged on each of two sides of the gravel cushion layer.
7. The gravel cement mixing pile composite foundation structure of claim 6, wherein a graded broken stone filter layer is arranged at the upper part of the drainage blind ditch.
8. A gravel cement mixing pile composite foundation structure as claimed in claim 7, wherein the graded gravel filter layer comprises a stone block layer, a pebble layer and a coarse sand layer which are arranged in sequence from bottom to top.
9. The gravel cement mixing pile composite foundation structure of claim 7, wherein a steel grating is arranged in the middle of the drainage blind ditch, and the graded broken stone filter layer is arranged above the steel grating.
10. The gravel cement mixing pile composite foundation structure of claim 7, wherein the upper surface of the graded crushed stone filter layer is flush with the upper surface of the crushed stone mattress layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122625429.8U CN216075058U (en) | 2021-10-29 | 2021-10-29 | Gravel cement mixing pile composite foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122625429.8U CN216075058U (en) | 2021-10-29 | 2021-10-29 | Gravel cement mixing pile composite foundation structure |
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| Publication Number | Publication Date |
|---|---|
| CN216075058U true CN216075058U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122625429.8U Active CN216075058U (en) | 2021-10-29 | 2021-10-29 | Gravel cement mixing pile composite foundation structure |
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| Country | Link |
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| CN (1) | CN216075058U (en) |
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2021
- 2021-10-29 CN CN202122625429.8U patent/CN216075058U/en active Active
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