CN212375898U - Collapsible loess foundation structure is handled to T shape compaction stake - Google Patents
Collapsible loess foundation structure is handled to T shape compaction stake Download PDFInfo
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- CN212375898U CN212375898U CN202020329877.6U CN202020329877U CN212375898U CN 212375898 U CN212375898 U CN 212375898U CN 202020329877 U CN202020329877 U CN 202020329877U CN 212375898 U CN212375898 U CN 212375898U
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Abstract
The utility model relates to a collapsible loess foundation structure is handled to T shape compaction stake, be provided with the vertical T shape compaction stake that the in bank was arranged in the foundation structure, two parts about T shape compaction stake divide into, and the soil in situ that the upper portion collapsible coefficient is big is major diameter stake, and the soil in situ that the lower part collapsible coefficient is little is minor diameter stake, and upper and lower two parts are coaxial cylindrical, structure as an organic whole. The utility model discloses it is practical to fit, and the technique is reasonable, saves investment, can effectively solve the loess foundation collapsibility problem, has richened collapsibility loess foundation treatment technology.
Description
Technical Field
The utility model relates to a civil engineering structure construction technical field, concretely relates to collapsible loess foundation structure is handled to T shape compaction stake.
Background
Compaction piles are one method of treating collapsible loess foundations. The method is characterized in that a pile hole is formed in soil by using methods of driving a steel sleeve, vibrating a pipe sinking and the like, then lime soil, cement soil or plain soil is backfilled in the hole layer by layer and tamped to form the pile, and common compaction piles comprise a soil compaction pile, a lime (cement) soil compaction pile and the like.
The main design parameters of the compaction pile include pile hole diameter, pile spacing, compaction coefficient and the like. The distance between the piles is generally 2.0 to 3.0 times of the diameter of the pile hole. In specific engineering practice, the diameter of the pile hole within the range of compaction depth is a fixed value. However, in the range of the compaction depth, the lower soil layer has a small collapse coefficient and the upper soil layer has a large collapse coefficient, that is, the diameter of the lower soil layer is smaller than that of the upper soil layer at the same pile spacing, and the upper soil layer and the lower soil layer have different pile diameters, which is economical and reasonable.
Disclosure of Invention
The utility model aims at providing a collapsible loess foundation structure is handled to T shape compaction stake comprises the different two parts in stake footpath, forms more reasonable economic structure.
The utility model discloses the technical scheme who adopts does:
the utility model provides a collapsible loess foundation structure is handled to T shape compaction stake which characterized in that:
the foundation structure is provided with vertical T-shaped compaction piles arranged in rows, the T-shaped compaction piles are divided into an upper part and a lower part, large-diameter piles are arranged in soil layers with large upper collapsible coefficients, small-diameter piles are arranged in soil layers with small lower collapsible coefficients, and the upper part and the lower part are coaxial cylinders and are of an integrated structure.
The T-shaped compaction piles are arranged in multiple rows and are arranged in a regular triangle, square or rectangle shape.
An improved soil cushion layer is arranged above the T-shaped compaction pile.
The improved soil cushion layer is filled with the soil.
The edges of the improved soil cushion layers on two sides of the filling are provided with longitudinal drainage ditches.
The drainage ditch is internally laid with a lime soil cushion layer, and the surface of the lime soil cushion layer is laid with a concrete block plate.
The utility model has the advantages of it is following:
the utility model discloses it is practical to fit, and the technique is reasonable, saves investment, can effectively solve the loess foundation collapsibility problem, has richened collapsibility loess foundation treatment technology.
Drawings
FIG. 1 is a cross-sectional view of a collapsible loess foundation structure treated by a T-shaped compaction pile;
FIG. 2 is a layout view of T-shaped packing piles;
FIG. 3 is an elevation view of a T-shaped packing pile;
FIG. 4 is a view showing a drain structure.
In the figure, 1-soil layer with large collapse coefficient, 2-soil layer with small collapse coefficient, 3-drainage ditch, 4-filling, 5-T-shaped compaction pile, 6-large diameter pile, 7-small diameter pile, 8-improved soil cushion layer, 9-inter-pile soil, 10-concrete block plate and 11-lime soil cushion layer.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The utility model relates to a collapsible loess foundation structure is handled to T shape compaction stake, be provided with vertical T shape compaction stake 5 that the in bank was arranged in the foundation structure, two parts about T shape compaction stake 5 divide into, be major diameter stake 6 in the soil layer 1 that the upper portion collapsible coefficient is big, be minor diameter stake 7 in the soil layer that the lower part collapsible coefficient is little, upper and lower two parts are coaxial cylindrical, structure as an organic whole.
The T-shaped compaction piles 5 are arranged in multiple rows and arranged in a regular triangle, square or rectangle. An improved soil cushion layer 8 is arranged above the T-shaped compaction piles 5. Above the improved soil mat layer 8 is a fill 4. The edges of the improved soil cushion layer 8 at both sides of the fill 4 are provided with longitudinal drainage ditches 3. The drainage ditch 3 is internally provided with a lime soil cushion layer 11, and the surface of the lime soil cushion layer 11 is provided with a concrete block plate 10.
The construction method for treating the collapsible loess foundation structure by using the T-shaped compaction pile comprises the following steps:
the method comprises the following steps: cleaning and leveling a construction site, and removing surface soil with the thickness of 0.3 m;
step two: constructing a T-shaped compaction pile:
arranging pile positions, accurately determining the positions of pile holes and numbering the pile holes;
the pore-forming sequence is carried out from outside to inside at intervals, the pore-forming adopts the methods of pipe sinking pore-forming, impact pore-forming and column hammer pore-forming, the pile hole filler adopts lime soil or cement soil, and the construction requirements of the conventional compaction pile construction are compounded;
the hole forming machine is put in place, a lower small-diameter pile is constructed firstly, after the hole is formed to the required depth, the mixed qualified filler is filled into the pile hole layer by using a standard hopper or a material transporting vehicle, and the pile hole is tamped layer by layer;
after the construction of the lower small-diameter pile is completed, a large-diameter hole forming device is used for reaming, and the upper large-diameter pile is constructed;
the whole or the fragment pile is completely constructed, the upper 0.7m thick soil layer is removed, and the soil layer is rolled and leveled;
step three: cushion layer construction:
after the quality of the compacted pile is detected to be qualified, constructing a pile top cushion layer, wherein the thickness of the cushion layer is 1m, and the cushion layer is made of lime soil or cement soil;
step four: construction of a drainage ditch:
and 3m outside the filling slope toe is provided with a drainage ditch which is reinforced by a concrete block plate, and the bottom of the drainage ditch is provided with a 0.15m thick lime soil anti-seepage cushion layer.
The T-shaped compaction pile is composed of two parts with different pile diameters, the upper part of the pile diameter is large, the lower part of the pile diameter is small, and the method is determined according to the following method:
(1) firstly, the diameter of pile holes and the distance between piles within the proposed compaction depth range are preliminarily calculated according to the traditional method.
(2) The stratum within the compaction depth range is manually divided into an upper layer and a lower layer, wherein the layer with larger collapsible coefficient is divided into one layer, and the layer with smaller collapsible coefficient is divided into the other layer.
(3) The pile spacing is a fixed value, and the diameters of the pile holes of the upper layer and the lower layer are respectively calculated and drawn up in a reverse mode according to a traditional method.
The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.
Claims (6)
1. The utility model provides a collapsible loess foundation structure is handled to T shape compaction stake which characterized in that:
vertical T-shaped compaction piles (5) arranged in rows are arranged in the foundation structure, the T-shaped compaction piles (5) are divided into an upper part and a lower part, large-diameter piles (6) are arranged in a soil layer (1) with a large upper collapsible coefficient, small-diameter piles (7) are arranged in a soil layer with a small lower collapsible coefficient, and the upper part and the lower part are coaxial cylinders and are of an integrated structure.
2. The T-shaped compaction pile processing collapsible loess foundation structure as claimed in claim 1, wherein:
the T-shaped compaction piles (5) are arranged in multiple rows and are arranged in a regular triangle, square or rectangle shape.
3. The T-shaped compaction pile processing collapsible loess foundation structure as claimed in claim 2, wherein:
an improved soil cushion layer (8) is arranged above the T-shaped compaction pile (5).
4. The T-shaped compaction pile processing collapsible loess foundation structure as claimed in claim 3, wherein:
the improved soil cushion layer (8) is provided with a filling (4) above.
5. The T-shaped compaction pile processing collapsible loess foundation structure as claimed in claim 4, wherein:
the edges of the improved soil cushion layers (8) at the two sides of the filling (4) are provided with longitudinal drainage ditches (3).
6. The T-shaped compaction pile processing collapsible loess foundation structure as claimed in claim 5, wherein:
a lime soil cushion layer (11) is laid in the drainage ditch (3), and a concrete block plate (10) is laid on the surface of the lime soil cushion layer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020329877.6U CN212375898U (en) | 2020-03-17 | 2020-03-17 | Collapsible loess foundation structure is handled to T shape compaction stake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020329877.6U CN212375898U (en) | 2020-03-17 | 2020-03-17 | Collapsible loess foundation structure is handled to T shape compaction stake |
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| CN212375898U true CN212375898U (en) | 2021-01-19 |
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| CN202020329877.6U Active CN212375898U (en) | 2020-03-17 | 2020-03-17 | Collapsible loess foundation structure is handled to T shape compaction stake |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012386A (en) * | 2022-06-23 | 2022-09-06 | 中化地质河南局集团有限公司 | Improvement method for weakening foundation loess collapsibility |
| CN115262535A (en) * | 2022-01-21 | 2022-11-01 | 郑州航空工业管理学院 | Variable-cross-section soil-squeezing precast tubular pile and construction process |
-
2020
- 2020-03-17 CN CN202020329877.6U patent/CN212375898U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262535A (en) * | 2022-01-21 | 2022-11-01 | 郑州航空工业管理学院 | Variable-cross-section soil-squeezing precast tubular pile and construction process |
| CN115012386A (en) * | 2022-06-23 | 2022-09-06 | 中化地质河南局集团有限公司 | Improvement method for weakening foundation loess collapsibility |
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