CN210507403U - Construction structure of soft foundation treatment transition section of plastic drainage plate and CFG pile - Google Patents
Construction structure of soft foundation treatment transition section of plastic drainage plate and CFG pile Download PDFInfo
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- CN210507403U CN210507403U CN201921075349.6U CN201921075349U CN210507403U CN 210507403 U CN210507403 U CN 210507403U CN 201921075349 U CN201921075349 U CN 201921075349U CN 210507403 U CN210507403 U CN 210507403U
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Abstract
The utility model provides a construction structures of changeover portion is handled with soft base of CFG stake is beaten in the soil layer and is established completion plastics drain bar and CFG stake back, adopts the mode of filling in grades to fill the soil body of two kind at least heights in transition region top, keeps certain pre-compaction time after filling the completion, unloads the overload soil body after the foundation soil body reaches consolidation degree and the intensity that satisfies the requirement, then carries out the construction of road bed and road surface structure layer again. So as to reduce or even eliminate differential settlement between the two processing modes, thereby ensuring the safety of road operation. Belongs to the field of soft foundation construction of roadbed engineering.
Description
Technical Field
The utility model relates to a construction structures of changeover portion is handled with soft base of CFG stake to plastics drain bar belongs to road bed engineering field.
Background
In China, the soft soil is widely distributed and is distributed in inland areas, coastal areas, plain areas and the like. Because the soft soil has the characteristics of high water content, low bearing capacity and the like, the phenomena of insufficient bearing capacity, large post-construction settlement and the like often occur when a project is built on the soft soil ground, and the soft soil needs to be reinforced when the soil layer is a soft soil layer. In actual engineering treatment, due to the limitation of conditions such as soil layer properties, geological landforms, construction period and the like, two or more foundation treatment methods are often adopted to jointly reinforce a soft foundation, a common treatment method is to drive plastic drainage plates or CFG piles into the soil layer, and at the moment, the rigidity difference of the composite foundation formed after treatment is large, so that large differential settlement can occur during construction and after completion. If the embankment is constructed directly on the transition area of the two reinforcement modes without treatment, the driving safety is possibly endangered. In engineering, an overload preloading method is commonly used for processing, and during processing, the two sides of the transition section are symmetrically piled, but the processing mode does not fully consider the rigidity difference between the two composite foundations, and the transition section can generate large differential settlement during construction and after completion. Therefore, it is necessary to provide a reasonable treatment method for the characteristics of the two reinforcement modes to reduce the settlement of the two reinforcement modes during construction and the settlement after construction.
Disclosure of Invention
The utility model provides a construction structures of changeover portion is handled with soft base of CFG stake to reduce or even eliminate the difference between two kinds of processing methods and subside, thereby guarantee the security of road operation.
In order to solve the problems, the construction structure for the transition section of the plastic drainage plate and the CFG pile soft foundation treatment is planned to be adopted, and comprises a first soil body and a second soil body, wherein the first soil body and the second soil body are filled above the transition section of the plastic drainage plate reinforcing area and the transition section of the CFG pile reinforcing area, the first soil body is filled right above the plastic drainage plate reinforcing area, the second soil body is filled right above the CFG pile reinforcing area, and the height of the first soil body is three to five times that of the second soil body.
In the construction structure, the first soil body and the second soil body are of an integrated structure, the height of the first soil body is four times that of the second soil body, and the widths of the first soil body and the second soil body above the plastic drainage plate reinforcing area and the CFG pile reinforcing area are the same.
Compared with the prior art, the method of the utility model can discharge the pore water in the soft soil through pre-pressing for a certain time, so that the soft soil is consolidated and completed before the roadbed is constructed, the strength of the soft soil foundation is improved, the settlement after construction is reduced or even eliminated, and the safety of road operation is ensured; meanwhile, the method considers that the rigidity of the composite foundation of the plastic drainage plate reinforcing area is smaller than that of the composite foundation of the CFG pile reinforcing area, and adopts an asymmetric pre-pressing mode, so that the rigidity difference between transition sections can be better reduced, the settlement difference during construction and after construction is reduced, and the normal use requirement of a road is met.
Drawings
Fig. 1 is a schematic sectional structure of the present invention.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present invention, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings.
Examples
Referring to fig. 1, the present embodiment provides a construction structure of a transition section is handled with soft base of CFG pile, including first soil mass 1 and second soil mass 2, first soil mass 1 and second soil mass 2 formula structure as an organic whole, first soil mass 1 and second soil mass 2 are all filled in the top of plastic drainage plate reinforced area 3 and CFG pile reinforced area 4 transition section, and first soil mass 1 is filled in directly over plastic drainage plate reinforced area 3, second soil mass 2 is filled in directly over CFG pile reinforced area 4, the height of first soil mass 1 is four times the height of second soil mass 2, the width of first soil mass 1 and second soil mass 2 is the same in plastic drainage plate reinforced area 3 and CFG pile reinforced area 4 top.
The construction method comprises the following steps: after the plastic drainage plates and the CFG piles are arranged in the soil layer, soil bodies with two heights are filled above the transition area in a graded filling mode, a certain prepressing time is kept after filling is finished, the overload soil body is removed after the foundation soil body reaches the consolidation degree and the strength meeting the requirements, then the construction of a roadbed and a pavement structure layer is carried out, the overload prepressing soil body is consistent with the roadbed body filler, the slope ratio of the side slopes on the two sides of the prepressing soil body is 1:1.5, 4 percent herringbone slopes are transversely arranged at the top outwards, the width b and the height h of the loading soil body are1Determined by the overload ratio and the design usage load,the overload ratio is 1.4-1.6, soil bodies with two heights are filled above the transition area in a graded filling mode, and the soil bodies with the two heights are filled right above the plastic drainage plate reinforcing area 3 and the CFG pile reinforcing area 4 respectively.
The method mainly comprises the following steps:
1) according to design requirements, obtaining a designed using load and an overload ratio, and determining the weight of the stacked soil body;
2) calculating the width and height of the stacked soil body according to the weight of the stacked soil body;
3) after the construction of the plastic drainage plate and the CFG pile is completed, soil mass is filled in a grading manner, soil is piled while the soil is flattened during filling, and the top surface is kept flat;
4) after the stacking is finished, the preloading is kept, the overloaded soil body is unloaded after the consolidation degree of the soil body meets the requirement, and then the construction of the pavement is carried out.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. The utility model provides a construction structures of changeover portion is handled with soft base of CFG stake to plastics drain bar, its characterized in that: including first soil body (1) and second soil body (2), first soil body (1) and second soil body (2) are all filled in the top of plastics drain bar reinforced area (3) and CFG stake reinforced area (4) changeover portion, and just first soil body (1) is filled directly over plastics drain bar reinforced area (3), and second soil body (2) is filled directly over CFG stake reinforced area (4), and the height of first soil body (1) is three to five times the height of second soil body (2).
2. The construction structure of the transition section for soft foundation treatment of the plastic drainage plate and the CFG pile according to claim 1, wherein: the first soil body (1) and the second soil body (2) are of an integrated structure, the height of the first soil body (1) is four times that of the second soil body (2), and the widths of the first soil body (1) and the second soil body (2) above the plastic drainage plate reinforcing area (3) and the CFG pile reinforcing area (4) are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921075349.6U CN210507403U (en) | 2019-07-10 | 2019-07-10 | Construction structure of soft foundation treatment transition section of plastic drainage plate and CFG pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921075349.6U CN210507403U (en) | 2019-07-10 | 2019-07-10 | Construction structure of soft foundation treatment transition section of plastic drainage plate and CFG pile |
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| Publication Number | Publication Date |
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| CN210507403U true CN210507403U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921075349.6U Active CN210507403U (en) | 2019-07-10 | 2019-07-10 | Construction structure of soft foundation treatment transition section of plastic drainage plate and CFG pile |
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| CN (1) | CN210507403U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185022A (en) * | 2019-07-10 | 2019-08-30 | 中铁二局第一工程有限公司 | A kind of constructing structure and method of plastic draining board and CFG treatment of soft foundation changeover portions |
| CN111501722A (en) * | 2020-05-21 | 2020-08-07 | 中铁工程设计咨询集团有限公司 | Vacuum preloading and CFG (cement fly-ash gravel) long and short combined pile foundation treatment method |
-
2019
- 2019-07-10 CN CN201921075349.6U patent/CN210507403U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185022A (en) * | 2019-07-10 | 2019-08-30 | 中铁二局第一工程有限公司 | A kind of constructing structure and method of plastic draining board and CFG treatment of soft foundation changeover portions |
| CN111501722A (en) * | 2020-05-21 | 2020-08-07 | 中铁工程设计咨询集团有限公司 | Vacuum preloading and CFG (cement fly-ash gravel) long and short combined pile foundation treatment method |
| CN111501722B (en) * | 2020-05-21 | 2022-06-03 | 中铁工程设计咨询集团有限公司 | Vacuum preloading and CFG (cement fly-ash gravel) long and short combined pile foundation treatment method |
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