CN203684254U - Cement-soil mixing pile composite foundation - Google Patents
Cement-soil mixing pile composite foundation Download PDFInfo
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- CN203684254U CN203684254U CN201420047693.5U CN201420047693U CN203684254U CN 203684254 U CN203684254 U CN 203684254U CN 201420047693 U CN201420047693 U CN 201420047693U CN 203684254 U CN203684254 U CN 203684254U
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- cement mixing
- mixing method
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- 239000002689 soil Substances 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 239000004568 cement Substances 0.000 claims description 79
- 238000000034 method Methods 0.000 claims description 67
- 238000010276 construction Methods 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 14
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 9
- 238000013019 agitation Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a cement-soil mixing pile composite foundation. The cement-soil mixing pile composite foundation comprises a road base, a cushion layer and a cement-soil mixing pile, wherein the cushion layer is used as a mattress layer at the same time; the road base is located below the surface layer of a road, the cushion layer is located below the road base, and the cement-soil mixing pile is located below the cushion layer. By means of the cement-soil mixing pile composite foundation, the pile can penetrate through soft soil layers and arrive at a soil layer with high bearing capacity, the compression modulus and bearing capability of the composite foundation can be enhanced substantially, differential settlement of the foundation is reduced, and relative settlement between the road and a building processed by adopting a conventional pile foundation can be reduced.
Description
Technical field
The utility model relates to field of civil engineering, is specifically related to the Composite Foundation of Soil cement Mixing Piles using under a kind of current conversion station road.
Background technology
When build current conversion station on saturated soft soil ground time, there is the features such as high-moisture, void ratio are large, high-compressibility due to saturated soft soil ground, if the ground under the road outside current conversion station does not carry out any processing, can exist absolute settlement amount excessive, can produce the problems such as larger differential settlement with current conversion station building entrance step or ramp joining place, can affect thus equipment carrying and personnel's turnover, make troubles to the carrying of equipment and personnel's turnover.
Utility model content
The purpose of this utility model is to provide the Composite Foundation of Soil cement Mixing Piles using under a kind of soft foundation road.
For achieving the above object, the utility model provides a kind of Composite Foundation of Soil cement Mixing Piles, it is characterized in that, described composite foundation comprises roadbase, bed course and cement mixing method, wherein,
Described bed course is the double mattress layer that does simultaneously; And
Described roadbase is positioned under surface course, and described bed course is positioned under described roadbase, and described cement mixing method is positioned under described bed course.
Preferably, described cement mixing method is single shaft cement mixing method, and the diameter of described cement mixing method is 400mm-600mm.
Preferably, the construction effective length of described cement mixing method is 4.0m-6.0m.
The degree of depth of preferably, described cement mixing method enters road bottom plastic～hard plastic argillic horizon is 0.4m-0.6m.
Preferably, the cement mixed weight of described cement mixing method is 10%-20%.
Preferably, the pile crown part that the length at described cement mixing method top place is 200mm-400mm is cut and backfill has sandstone.
Preferably, described cushion thickness is 200mm-400mm, and in described bed course, is equipped with 200mm-400mm graded sand and stone.
Preferably, in adjacent two rows' that arrange in described composite foundation cement mixing method, every three adjacent cement mixing methods form an equilateral triangle.
Preferably, the distance between any two adjacent cement mixing methods is the cement mixing method diameter of 2 to 6 times.Composite Foundation of Soil cement Mixing Piles of the present utility model, can make the long soft layer that penetrates of stake arrive the relatively high soil layer of bearing capacity, significantly improve modulus of compressibility and the bearing capacity of composite foundation, reduce the differential settlement of ground, can reduce the relative settlement between the construction of structures that adopts ordinary pile foundation processing in road and station.
Accompanying drawing explanation
Fig. 1 is the profile being provided with according to using the road of the ground of cement mixing method under current conversion station road of the present utility model.
Fig. 2 is the schematic diagram of arranging according to cement mixing method in current conversion station road foundation of the present utility model.
The specific embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is elaborated, understands the purpose of this utility model, feature and advantage so that clearer.It should be understood that embodiment shown in the drawings is not the restriction to the utility model scope, and just for the connotation of technical solutions of the utility model is described.
Terminological interpretation:
Replacement ratio: in composite foundation, a pile is a composite earth body unit with the inter-pile soil body that it is born.In this composite earth body unit, the cross-sectional area of stake and the ratio of composite earth body unit area, be called replacement ratio.
Fig. 1 illustrates the profile being provided with according to the road of Composite Foundation of Soil cement Mixing Piles of the present utility model.As shown in Figure 1, in the utility model, road is divided into successively from top to bottom surface course 1, roadbase 2, bed course 3 and is provided with the bottom of cement mixing method 6, the double mattress layer that does of wherein said bed course 3.When build current conversion station on saturated soft soil ground time, there is the features such as high-moisture, void ratio are large, high-compressibility due to saturated soft soil ground, in bottom, arrange cement mixing pile 6 by greatly improve absolute settlement amount excessive, can produce the problems such as larger differential settlement with building entrance step or ramp joining place.
According to a preferred embodiment of the present utility model, cement mixing method 6 is single shaft cement mixing method, cement mixing method 6 diameters are preferably 400mm-600mm, being more preferably 450mm-550mm, is about 500mm best, and construction effective length is preferably 4.0m-6.0m, be more preferably 4.5m-5.5m, be 5.0m best, cement mixing method 6 enters road bottom, and plastic～hard plastic argillic horizon degree of depth is preferably got 0.4-0.6m, is more preferably got 0.5m.The cement mixed weight of the cement mixing method under current conversion station road is preferably got 10%-20%, more preferably gets 15%, and wherein cement mixed weight refers to the ratio that cement weight and compacted soil weigh.Agitation pile 6 water/binder ratio are controlled at 0.40-0.60, preferably get 0.50, and curing compound adopts Portland cement, and preferably getting strength grade is P.O42.5 level Portland cement.
The construction technology that mixing pile construction adopts full pile body the second gunite to stir for four times.After having constructed, the pile crown part 5 that is 200mm-400mm by the length at cement mixing method 6 top places cuts, the length that wherein pile crown of cement mixing method 6 cuts part 5 is preferably got 250mm-350mm, more preferably gets 300mm, and the pile crown part 5 cutting with sandstone backfill.At the gradated sand-stone cushion 3 that stops slurry face 4 tops laying 200mm-400mm, preferably stopping slurry face 4 tops laying 250mm-350mm gradated sand-stone cushions 3, more preferably stopping slurry face 4 tops laying 300mm gradated sand-stone cushions 3, the double mattress layer that does of this bed course 3 simultaneously.In the above gradated sand-stone cushion 3 Shang Zai builder's road basic unit 2, builder's road surface layer 1 again on roadbase 2.
Fig. 2 illustrates according to cement mixing method in road foundation of the present utility model and arranges schematic diagram.As shown in Figure 2, the cement mixing method 6 of each horizontally-arranged (along the row of road width direction) is aligned with each other, the central axis that is same row's cement mixing method 6 is positioned on same axis, the cement mixing method 6 of each file is also aligned with each other simultaneously, and the central axis of the cement mixing method 6 of same row is positioned on same axis.The cement mixing method 6 adopting in the utility model is by equilateral triangle layout, and, in adjacent two rows' cement mixing methods 6, every three cement mixing methods 6 adjacent each other are arranged in the mode that forms an equilateral triangle.Preferably, the distance between two adjacent cement mixing methods 6 is the cement mixing method diameter of 2 to 6 times.In one preference, the distance between two adjacent cement mixing methods 6 is got 1500mm.
Arrange cement mixing method 6 in road foundation time, can first in the symmetrical center line of road, arrange and then be arranged symmetrically with all the other cement mixing methods 6 according to above-mentioned requirements to these symmetrical center line both sides by a row cement mixing method 6.
For instance, as shown in Figure 2, in 4 meters of wide road foundations, be furnished with according to cement mixing method 6 of the present utility model, the cement mixing method 6 of each horizontally-arranged is aligned with each other, and two adjacent horizontally-arrangeds are furnished with respectively 6 and 4 cement mixing methods 6 of 3 cement mixing methods successively simultaneously.The cement mixing method 6 of each file is also aligned with each other simultaneously.Cement mixing method 6 is pressed equilateral triangle and is arranged,, in adjacent two rows' cement mixing method 6, every three cement mixing methods 6 adjacent each other are arranged in the mode that forms an equilateral triangle.Distance between adjacent two cement mixing methods 6 is 1500mm.In practice, can in 4 meters of road foundation symmetrical center line, arrange a row cement mixing method 6, then be arranged symmetrically with all the other cement mixing methods 6 with size to these symmetrical center line both sides according to the method described above.
Through overtesting, there is good bearing capacity according to the road of building at weak soil of above-mentioned arrangement on the ground, and can not bring the problems such as road settlement.To build at weak soil current conversion station road on the ground as example, according to using under current conversion station road of the present utility model, the detection method of ground of cement mixing method is as follows: the surveyed area of choosing on several places road of current conversion station site surrounding detects, for example, choose three surveyed areas on north side, southern side and the west side road of current conversion station site and detect.Detect methods such as adopting light moving spy, boring coring, indoor proportioning test, Pile Composite Foundation load test.Agitation pile pile carried out light dynamic sounding in 3 days; After agitation pile pile 28 days, carry out Pile Composite Foundation load test and drilled drawing-core test.Before agitation pile starts, in natural ground, get undisturbed soil sample, indoor be that 10%-20% prepares cement-soil test block by cement mixed weight, preferably indoor be 15% to prepare cement-soil test block by cement mixed weight, be used for carrying out natural unconfined compression strength test of 28d, the 90d length of time.Observe Pile Composite Foundation characteristic load bearing capacity and Composite Subgrade Deformation Modulus E0 average by static load test result, determine whether to meet road design requirement; Judge by light dynamic sounding, boring and coring result of the test whether cement-soil stirring pile construction quality meets relevant specification requirement simultaneously, judge that whether respective handling scheme is feasible.
Adopt cement mixing method to process ground under current conversion station road by said method, determine replacement ratio, the long and cement mixed weight of stake simultaneously, according to the requirement to bearing capacity, make the long soft layer that penetrates of stake arrive the relatively high soil layer of bearing capacity, make thus modulus of compressibility and the bearing capacity of composite foundation significantly improve, under current conversion station road, ground absolute settlement amount reduces, the mutual linking between the building of solving road and employing ordinary pile foundation processing preferably, structure.
Below described preferred embodiment of the present utility model in detail, but it will be appreciated that, after having read above-mentioned instruction content of the present utility model, those skilled in the art can make various changes or modifications the utility model.These equivalent form of values fall within the application's appended claims limited range equally.
Claims (9)
1. a Composite Foundation of Soil cement Mixing Piles, is characterized in that, described composite foundation comprises roadbase, bed course and cement mixing method, wherein,
Described bed course is the double mattress layer that does simultaneously; And
Described roadbase is positioned under surface course, and described bed course is positioned under described roadbase, and described cement mixing method is positioned under described bed course.
2. ground as claimed in claim 1, is characterized in that, described cement mixing method is single shaft cement mixing method, and the diameter of described cement mixing method is 400mm-600mm.
3. ground as claimed in claim 1, is characterized in that, the construction effective length of described cement mixing method is 4.0m-6.0m.
4. ground as claimed in claim 1, is characterized in that, the degree of depth of described cement mixing method enters road bottom plastic～hard plastic argillic horizon is 0.4m-0.6m.
5. ground as claimed in claim 4, is characterized in that, the cement mixed weight of described cement mixing method is 10%-20%.
6. ground as claimed in claim 1, is characterized in that, the pile crown part that the length at described cement mixing method top place is 200mm-400mm is cut and backfill has sandstone.
7. ground as claimed in claim 1, is characterized in that, described cushion thickness is 200mm-400mm, and in described bed course, is equipped with 200mm-400mm graded sand and stone.
8. ground as claimed in claim 1, is characterized in that, in adjacent two rows' that arrange in described composite foundation cement mixing method, every three adjacent cement mixing methods form an equilateral triangle.
9. ground as claimed in claim 8, is characterized in that, the distance between any two adjacent cement mixing methods is the cement mixing method diameter of 2 to 6 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420047693.5U CN203684254U (en) | 2014-01-20 | 2014-01-20 | Cement-soil mixing pile composite foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420047693.5U CN203684254U (en) | 2014-01-20 | 2014-01-20 | Cement-soil mixing pile composite foundation |
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| CN203684254U true CN203684254U (en) | 2014-07-02 |
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| CN201420047693.5U Expired - Fee Related CN203684254U (en) | 2014-01-20 | 2014-01-20 | Cement-soil mixing pile composite foundation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113500A (en) * | 2015-08-14 | 2015-12-02 | 中冶沈勘工程技术有限公司 | Method for preparing variable-replacement-rate pile composite foundation |
| CN109098216A (en) * | 2018-08-28 | 2018-12-28 | 中南大学 | Circular cross-section fender post locally abolishes rear Bend bearing capacity calculation method |
| CN114960610A (en) * | 2022-04-25 | 2022-08-30 | 三明学院 | Composite foundation of single-component geopolymer reinforced soil body and construction method thereof |
-
2014
- 2014-01-20 CN CN201420047693.5U patent/CN203684254U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113500A (en) * | 2015-08-14 | 2015-12-02 | 中冶沈勘工程技术有限公司 | Method for preparing variable-replacement-rate pile composite foundation |
| CN109098216A (en) * | 2018-08-28 | 2018-12-28 | 中南大学 | Circular cross-section fender post locally abolishes rear Bend bearing capacity calculation method |
| CN114960610A (en) * | 2022-04-25 | 2022-08-30 | 三明学院 | Composite foundation of single-component geopolymer reinforced soil body and construction method thereof |
| CN114960610B (en) * | 2022-04-25 | 2024-03-26 | 三明学院 | Composite foundation for reinforcing soil body by monocomponent geopolymer and construction method thereof |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: CHINA POWER ENGINEERING CONSULTING (Group) Corp. Patentee after: ELECTRIC POWER PLANNING & ENGINEERING INSTITUTE Patentee after: EAST CHINA ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Patentee after: NORTHEAST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Patentee after: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING Group Corp. Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Patentee after: Southwest Electric Power Design Institute CO., Ltd. of China Power Engineering Consulting Group Patentee after: NORTH CHINA POWER ENGINEERING CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: CHINA POWER ENGINEERING CONSULTING Group Corp. Patentee before: ELECTRIC POWER PLANNING & ENGINEERING INSTITUTE Patentee before: CHINA POWER ENGINEERING CONSULTING Group CORPORATION EAST CHINA ELECTRIC POWER DESIGN INSTITUTE Patentee before: NORTHEAST ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING Group Patentee before: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING Group Corp. Patentee before: NORTHWEST ELECTRIC POWER DESIGN INST. OF CHINA POWER ENGINEERING CONSULTING Group Patentee before: SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING Group Corp. Patentee before: NORTH CHINA POWER ENGINEERING CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 |
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| CF01 | Termination of patent right due to non-payment of annual fee |