CN203373764U - Concrete core sand-gravel pile composite foundation - Google Patents
Concrete core sand-gravel pile composite foundation Download PDFInfo
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- CN203373764U CN203373764U CN201320462136.5U CN201320462136U CN203373764U CN 203373764 U CN203373764 U CN 203373764U CN 201320462136 U CN201320462136 U CN 201320462136U CN 203373764 U CN203373764 U CN 203373764U
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Abstract
The utility model relates to a composite foundation and discloses a concrete core sand-gravel pile composite foundation. The concrete core sand-gravel pile composite foundation comprises a cushion layer (1) on the upper layer and a pile base layer (2) on the lower layer, wherein the pile base layer (2) comprises a plurality of concrete core sand-gravel piles (3) and inter-pile soil (4), each concrete core sand-gravel pile (3) comprises a cast-in-place reinforced concrete pile core (5) and an aggregate outer shell (6), each cast-in-place reinforced concrete pile core (5) comprises a steel reinforcement cage (7) and concrete (8) poured into the reinforcement cage (7), longitudinal steel bars are bound to form each steel reinforcement cage (7), a cone cushion layer (9) composed of gradation compacted crushed stone is arranged at the top end of each cast-in-place reinforced concrete pile core (5), a geogrid (10) is arranged in the cushion layer (1), permanent filled earth (11) is arranged on the upper surface of the cushion layer (1), and the lower surface of the cushion layer (1) makes direct contact with the inter-pile soil (4) or the cone cushion layers (9). The concrete core sand-gravel pile composite foundation is good in integrity, strong in bearing capacity, capable of effectively delivering upper portion loads to a bearing layer and capable of effectively reducing road surface sedimentation.
Description
Technical field
The utility model relates to a kind of composite foundation, relates in particular to a kind of concrete core sand stone mar composite foundation.
Background technology
At present, China's overwhelming majority speedway is built in the coastal areas such as the peninsula, Liaoning, the Shandong Peninsula, Beijing-Tianjin area, Yangtze River Delta, the Delta of the Pearl River, most coastline is Muddy Bottoms, particularly near great river, river mouth, great river, mostly be river facies, marine facies or Lake facics, the classification of soil mostly is mud, silt clay, Muddy Bottoms lam.Build highway on this class soft foundation, can run into the engineering problems such as stable and distortion.Especially for speedway, it not only requires embankment stable, and settlement after construction is had relatively high expectations, and will strictly control especially differential settlement after work.Speedway operating condition from built soft foundation, " bumping at bridge-head " phenomenon is still serious.Highway Code (JTGD30-2004) regulation speedway, Class I highway allow settlement after construction: general highway section is less than 30cm, and culvert or box road place are less than 20cm, and abutment and embankment adjacent are less than 10cm.Therefore, building highway on soft foundation, how reducing settlement after construction is a problem in the urgent need to address.
Current method for processing foundation carries out object of construction production in Deep Thick Soft Ground Area and has some limitations.The preloading drainage consolidation method reinforcing phase is long, and settlement after construction is large, need the record of strict controlled loading speed in work progress; Dynamic compaction is subject to ruggedized equipment to ram the restriction of energy, groundwater table and soil condition, range of application is less, and larger to surrounding environment influence; Deeply stir stake, compaction pile and immersed tube CFG stake etc., it is larger that working depth, construction quality are affected by the factor such as machine construction team, and stake bottom poor continuity, bearing capacity are inadequate when natural weak soil intensity is low.Prefabricated tubular pile is met hard interbedded layer and is penetrated difficulty, is difficult to effective complete design requirement during the reply complex geological condition.
Summary of the invention
The utility model is poor for globality in prior art, a little less than shock resistance, large, the construction quality of settlement after construction is subject to geological conditions to affect the deficiencies such as larger, provides a kind of good integrity, shock resistance is strong, settlement amount after construction is little, can better adapt to the concrete core sand stone mar composite foundation of various geological conditionss.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals.
A kind of concrete core sand stone mar composite foundation, comprise the mattress layer on upper strata and the pile foundation layer of lower floor, and the pile foundation layer comprises some concrete core sand stone mars and inter-pile soil, and concrete core sand stone mar comprises cast-in-situ steel reinforced concrete stake core and aggregate shell.Concrete core sand stone mar composite foundation is arranged on hard bearing stratum, concrete core sandy soil stake in the pile foundation layer contacts with bearing stratum, the cast-in-situ steel reinforced concrete stake core good integrity in the stake of concrete core sand soil, and the power of holding is strong, longitudinal loading can be born preferably and transmit to bearing stratum, roadbed subsidence can be effectively reduced.
As preferably, cast-in-situ steel reinforced concrete stake core comprises that longitudinal reinforcement ties up the reinforcing cage of formation and build the concrete in reinforcing cage.According to construction landform, geological conditions and design requirement, a core longitudinal reinforcement is set, tie up the formation reinforcing cage, and in reinforcing cage concreting, form cast-in-situ steel reinforced concrete stake core, change a core good integrity, shock resistance is strong, can adapt to preferably various topographic and geologic conditions, meet the complex-terrain construction requirement, settlement after construction is little.
As preferably, the aggregate shell is permeable aggregate shell, and permeable aggregate is sand or stone fragment.Cast-in-situ steel reinforced concrete stake core arranges the permeable aggregate shell of sand or stone fragment formation outward, add timber pile core side friction power and vertical drainage effect, in addition, permeable aggregate intensity and ability of anti-deformation are greater than inter-pile soil, formed concrete core sand stone mar composite foundation supporting capacity is improved, reduce settling amount, thereby further improve resistance to overturning and the survivability of ground.
As preferably, cast-in-situ steel reinforced concrete stake core top arranges by the gravelly cone bed course of grating compacting.Cast-in-situ steel reinforced concrete stake core top arranges conical bed course, and the rubble by the grating compacting progressively conducts longitudinal loading, prevents that the core from puncturing mattress layer.
As preferably, the mattress layer soffit contacts with cone bed course or inter-pile soil, and mattress layer is sand or broken stone cushion layer, and thickness is 40～80cm.Sand or broken stone cushion layer have certain thickness, and larger load can be born and conduct to certain tensile strength, and homogenizing roadbed stress reasonable distribution load are between stake top and stake.
As preferably, geo-grid is set in mattress layer, in mattress layer, the setting of geo-grid is mutually locked graininess sand or rubble and grid, form stability plane, prevent that filler from sinking, geo-grid can dispersed vertical loading in addition, reduces the roadbed vibrations, increase the stability of roadbed, prevent lateral deformation of subgrade or road surface crackle.
As preferably, the mattress layer upper surface arranges permanent banketing.The mattress layer upper surface arranges permanent banketing, and the permanent upper surface that bankets arranges provisional overload and bankets, compacting concrete core sand stone mar composite foundation, reduction of erection time.
The utility model is owing to having adopted above technical characterictic, cast-in-situ steel reinforced concrete stake core and permeable aggregate that employing is arranged on bearing stratum form concrete core sand stone mar, on stake core top, arrange by the gravelly cone bed course of grating compacting, top arranges mattress layer and permanent banketing, good integrity, upper load can be passed to bearing stratum, can effectively reduce roadbed subsidence.
The accompanying drawing explanation
Fig. 1 is the structural representation of a kind of concrete core sand stone mar composite foundation of the present utility model.
Fig. 2 is the concrete core sand stone mar structural representation of Fig. 1.
The toponym that in accompanying drawing, each number designation refers to is as follows: 1-mattress layer, 2-pile foundation layer, 3-concrete core sand stone mar, 4-inter-pile soil, 5-cast-in-situ steel reinforced concrete stake core, 6-aggregate shell, 7-reinforcing cage, 8-concrete, 9-cone bed course, 10-geo-grid, 11-permanent banketing.
The specific embodiment
Below in conjunction with accompanying drawing 1-2 and embodiment, the utility model is described in further detail.
Embodiment
A kind of concrete core sand stone mar composite foundation, as shown in Figure 1, comprise the mattress layer 1 on upper strata and the pile foundation layer 2 of lower floor, pile foundation layer 2 comprises some concrete core sand stone mars 3 and inter-pile soil 4, concrete core sand stone mar 3 comprises cast-in-situ steel reinforced concrete stake core 5 and aggregate shell 6, cast-in-situ steel reinforced concrete stake core 5 tops arrange by the gravelly cone pad 9 of grating compacting, mattress layer 1 is sand or broken stone cushion layer, the interior geo-grid 10 that arranges of mattress layer 1, mattress layer 1 upper surface arranges and permanently bankets 11, and soffit directly contacts with inter-pile soil 4 or cone bed course 9.Cast-in-situ steel reinforced concrete stake core 5 comprises that longitudinal reinforcement ties up the reinforcing cage 7 of formation and build the concrete eight in reinforcing cage, and in aggregate shell 6, permeable aggregate is sand or stone fragment, as shown in Figure 2.
During construction, adopt long spiral way to generate the stake hole, the rear continuous pouring concrete eight of reinforcing cage 7 is placed at the Zhuan Kong center, built after concrete curing reaches designing requirement, form aggregate shell 6 at cast-in-situ steel reinforced concrete stake core 5 circumfusion stone fragments, after pile, the stake top is a little less than ground, at the stake end face, adopt grating compacting rubble to form cone bed course 9, adopt afterwards rubble to lay the thick mattress layer 1 of 60cm, the interior laying one deck of broken stone cushion layer 1 geo-grid 10, lay on mattress layer top that one deck is permanent bankets 11, Cast-in-place concrete core sand stone mar 3, inter-pile soil 4 forms concrete core sand stone mar composite foundation together with mattress layer 1.This concrete core sand stone mar composite foundation is arranged on hard bearing stratum, concrete core sandy soil stake in the pile foundation layer contacts with bearing stratum, cast-in-situ steel reinforced concrete stake core in the stake of concrete core sand soil bears longitudinal loading, good integrity, the power of holding is strong, and transmit upper load to bearing stratum, can effectively reduce roadbed subsidence.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (7)
1. a concrete core sand stone mar composite foundation, comprise the mattress layer (1) on upper strata and the pile foundation layer (2) of lower floor, pile foundation layer (2) comprises some concrete core sand stone mars (3) and inter-pile soil (4), it is characterized in that: concrete core sand stone mar (3) comprises cast-in-situ steel reinforced concrete stake core (5) and aggregate shell (6).
2. a kind of concrete core sand stone mar composite foundation according to claim 1 is characterized in that: cast-in-situ steel reinforced concrete stake core (5) comprises that longitudinal reinforcement ties up the reinforcing cage of formation (7) and build the concrete (8) in reinforcing cage.
3. a kind of concrete core sand stone mar composite foundation according to claim 1, it is characterized in that: aggregate shell (6) is permeable aggregate shell, and permeable aggregate is sand or stone fragment.
4. a kind of concrete core sand stone mar composite foundation according to claim 1, it is characterized in that: cast-in-situ steel reinforced concrete stake core (5) top arranges by the gravelly cone bed course of grating compacting (9).
5. a kind of concrete core sand stone mar composite foundation according to claim 4, it is characterized in that: mattress layer (1) soffit contacts with cone bed course (9) or inter-pile soil (4), and thickness is 40～80cm.
6. a kind of concrete core sand stone mar composite foundation according to claim 1, is characterized in that: geo-grid (10) is set in mattress layer (1).
7. a kind of concrete core sand stone mar composite foundation according to claim 1, it is characterized in that: mattress layer (1) upper surface arranges permanent banketing (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320462136.5U CN203373764U (en) | 2013-07-30 | 2013-07-30 | Concrete core sand-gravel pile composite foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320462136.5U CN203373764U (en) | 2013-07-30 | 2013-07-30 | Concrete core sand-gravel pile composite foundation |
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| CN203373764U true CN203373764U (en) | 2014-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320462136.5U Expired - Fee Related CN203373764U (en) | 2013-07-30 | 2013-07-30 | Concrete core sand-gravel pile composite foundation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153385A (en) * | 2014-08-22 | 2014-11-19 | 中国建筑西南勘察设计研究院有限公司 | Mattress layer, composite foundation and construction method for composite foundation |
| CN108018752A (en) * | 2017-12-02 | 2018-05-11 | 江苏惠淳建设有限公司 | A kind of soft soil roadbed reinforcing construction process |
-
2013
- 2013-07-30 CN CN201320462136.5U patent/CN203373764U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153385A (en) * | 2014-08-22 | 2014-11-19 | 中国建筑西南勘察设计研究院有限公司 | Mattress layer, composite foundation and construction method for composite foundation |
| CN108018752A (en) * | 2017-12-02 | 2018-05-11 | 江苏惠淳建设有限公司 | A kind of soft soil roadbed reinforcing construction process |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20140101 Termination date: 20180730 |