CN213328983U - Soft soil foundation prepressing drainage consolidation field peripheral building/structure protection structure - Google Patents
Soft soil foundation prepressing drainage consolidation field peripheral building/structure protection structure Download PDFInfo
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- CN213328983U CN213328983U CN201922204786.XU CN201922204786U CN213328983U CN 213328983 U CN213328983 U CN 213328983U CN 201922204786 U CN201922204786 U CN 201922204786U CN 213328983 U CN213328983 U CN 213328983U
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Abstract
The utility model discloses a soft soil foundation pre-compaction drainage concreties the peripheral structure of building/structures in place. The protective structure is characterized in that flexible piles and rigid piles are respectively arranged between a vacuum preloading area and a building and a structure to be protected, the flexible piles are used for isolating a treatment area from hydraulic connection with the periphery, and the rigid piles are used for controlling lateral force caused by soil pressure change so as to protect the building and the structure from tensile fracture damage caused by uneven settlement or seepage during drainage consolidation. The flexible piles are arranged on one side close to the processing area, and the rigid piles are arranged on one side of the protected building and the structure. The utility model provides a protective structure has construction easy operation, can effectively protect the characteristics of building, structure differential settlement. The utility model discloses can effectively block the seepage flow of peripheral soil body internal water, the destruction that the prevention osmotic force arouses.
Description
Technical Field
The utility model relates to a soft soil foundation field, more specifically belongs to the protective structure to peripheral building, structures when soft soil foundation pre-compaction drainage consolidation method handles the ground.
Background
When the drainage consolidation method is adopted to treat the soft soil foundation, the method has great influence on buildings and structures in a certain range around the site, and the pulling crack damage or the instability of the soft soil foundation are often caused by uneven settlement. The influence on surrounding buildings and structures when the soft soil foundation is treated by the drainage consolidation method is mainly caused by two reasons: firstly, because hydraulic gradients exist on the inner side and the outer side of a field in the foundation treatment process, seepage is formed, and uneven settlement is generated, for example, the underground pipeline is cracked and damaged; on the other hand, the soil body is compressed in the foundation treatment process, the balance state of the soil pressure inside and outside the treatment area is broken, and the formed soil pressure difference causes instability of the building and the structure.
At present, no mature and reliable engineering method and design basis exist for the protection measures of surrounding buildings and structures. In the traditional mode, cast-in-place piles, precast piles and the like are generally adopted as retaining structures and are also used as water intercepting curtains, or deep gravity type cement-soil walls are adopted as retaining structures. The protection measures are too conservative, the construction cost is high and the construction work amount is large.
Disclosure of Invention
In order to solve the problem, the utility model provides a protective structure to peripheral building, structures when soft soil foundation is handled to simple, effectual pre-compaction drainage consolidation method.
In order to achieve the above object, the utility model provides a technical scheme is:
a flexible pile is arranged between a drainage consolidation method treatment area and a building or a structure to be protected, and a rigid pile is arranged on the side of the flexible pile.
The flexible pile can effectively separate hydraulic connection between the treatment area and the outer side, and can be used as a vertical sealing system for a vacuum preloading method.
The rigid pile plays a role in retaining soil and prevents the instability of buildings and structures outside the field.
The rigid pile is close to the soft foundation treatment boundary, and the distance between the flexible pile and the rigid pile is preferably equal to the effective treatment range of the single vertical drainage body.
The rigid piles are in a non-overlapping form, and the distance between piles is preferably 0.9 x (1.5D +0.5) m, wherein D is the diameter of the rigid pile, and D is preferably 0.7 m to 1 m. The drilling depth is preferably 3b + d meters, wherein b is 3 meters when the width b of the foundation of the building and the structure is more than 3 meters, and 6 meters when the buried depth d of the foundation is more than 6 meters.
The flexible pile needs to adopt a lap joint mode, the pile body is waterproof, the driving depth needs to penetrate through the permeable layer and enter the position below the impermeable layer by more than 0.5 m, and the depth is not less than the depth of the vertical drainage body.
Compared with the traditional method, the beneficial effects of the utility model are that:
the utility model discloses can the peripheral building of effectual protection, structures, save engineering cost, construction convenience is swift.
Drawings
Figure 1 is a floor plan of the pile of example 1.
Fig. 2 is a cross-sectional view a-a of the pile of example 1.
Figure 3 is a floor plan of the pile of example 2.
Fig. 4 is a cross-sectional view a-a of the pile of example 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent.
Example 1
The utility model discloses a structural schematic diagram is shown in fig. 1, 2, the utility model discloses a soft soil foundation vacuum preloading place all ring edge borders protection architecture is equipped with flexile pile 2 between regional 1 and the peripheral building 4 of soft soil foundation vacuum preloading, and the side of flexile pile 2 is equipped with permanent rigidity stake 3.
Above-mentioned flexible stake 2 can be clay mixing pile, and rigid pile 3 adopts permanent stake, like cement mixing pile, plain concrete pile or CFG stake etc..
A water-permeable and air-permeable layer 7 is present in the vacuum preloading region 1.
A vertical drainage system 6 is arranged in the vacuum preloading area 1.
The vacuum preloading area 1 is provided with a preloading system 5.
In the method, plain concrete piles are driven and arranged by taking the vacuum preloading boundary line as a starting point, the pile length of the plain concrete piles is preferably 3b + D meters, and the pile spacing is 0.9 x (1.5D +0.5) meters; beat apart from the effective handling scope department of single vertical drainage body of plain concrete pile stake and establish clay stirring stake, clay stirring stake adopts the overlap joint form, and the stake length should not be less than vertical drainage system degree of depth and pierces through the permeable bed and is not less than 0.5 meter.
And after the foundation treatment construction is finished, the plain concrete piles and the surrounding soil body form a composite foundation.
Example 2
The utility model discloses a schematic structure is shown in fig. 3, 4, the utility model discloses a soft soil foundation vacuum preloading place all ring edge borders protection device is equipped with flexile pile 2 between regional 1 and the peripheral building 4 of soft soil foundation vacuum preloading, and the side of flexile pile 2 is equipped with interim rigid pile 3.
Above-mentioned flexible pile 2 can be clay mixing pile, and rigid pile 3 adopts interim stake, like steel sheet pile etc..
A water-permeable and air-permeable layer 7 is present in the vacuum preloading region 1.
A vertical drainage system 6 is arranged in the vacuum preloading area 1.
The vacuum prepressing area 1 is provided with a prepressing system 5
In the method, the rigid sheet piles are arranged by taking the vacuum preloading boundary line as a starting point, the length of the rigid sheet piles is preferably 3b + d meters, and the steel sheet piles are arranged in a lap joint manner; the effective treatment range department apart from single vertical drainage body of rigid sheet pile is beaten and is established clay stirring stake, and clay stirring stake adopts the overlap joint form, and the stake length should not be less than vertical drainage system degree of depth and pierces through the permeable stratum and is not less than 0.5 meter.
And the steel sheet pile can be detached after the foundation treatment construction is finished.
It is clear that the above examples only illustrate several types of piles for the sake of clarity of the protection method, and are not intended to limit the present application of the novel embodiment. In the field of civil engineering, the types of rigid and flexible piles are various, and other different forms of changes can be made on the basis of the pile types. This need not be exhaustive, nor should it be exhaustive. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (11)
1. Soft soil foundation pre-compaction drainage concreties peripheral structure of building/structures in place, its characterized in that: a flexible pile is arranged between the drainage consolidation method treatment area and a building or a structure to be protected, and a rigid pile is arranged outside the flexible pile.
2. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: one side of the drainage consolidation method treatment area is provided with a row of flexible piles.
3. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: a row of rigid piles is arranged at one side close to a building or a structure to be protected.
4. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: the distance between the rigid pile and the flexible pile is suitable for the influence distance of a single vertical drainage body in the treatment field.
5. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: one side of the drainage consolidation method treatment area is provided with a row of flexible piles in an overlapping mode.
6. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: a row of rigid piles is arranged on one side close to a building or a structure to be protected without adopting a lap joint mode, the distance between piles is preferably 0.9 multiplied by (1.5D +0.5) meter, wherein D is the diameter of the rigid piles, and D is preferably 0.7 meter to 1 meter.
7. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: one side of the drainage consolidation method treatment area is provided with a row of flexible piles, the pile bodies of the flexible piles are impermeable, the flexible piles need to penetrate through the permeable layer and enter the position below the impermeable layer by more than 0.5 m, and the driving depth is not less than the depth of the vertical drainage body.
8. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: the driving depth of a row of rigid piles arranged on one side of a building and a structure to be protected is preferably 3b + d meters, wherein b is the width of the foundation of the building and the structure, 3 meters are taken when b is larger than 3 meters, 6 meters are taken when d is larger than 6 meters.
9. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: the protective structure is used for protecting surrounding buildings and structures when the field is treated by adopting a vacuum preloading drainage consolidation method, a surcharge preloading drainage consolidation method, a vacuum combined surcharge preloading drainage consolidation method and a strong drainage dewatering preloading consolidation method.
10. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: one side of the drainage consolidation method treatment area is provided with a row of flexible piles which can be clay stirring piles.
11. A soft soil foundation pre-compaction drainage consolidation site peripheral building/structure protective structure according to claim 1, characterized in that: the rigid piles arranged at one side close to a building or a structure to be protected can be cement mixing piles, concrete filling piles, cement fly ash gravel piles, steel pipe piles and steel plate piles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922204786.XU CN213328983U (en) | 2019-12-11 | 2019-12-11 | Soft soil foundation prepressing drainage consolidation field peripheral building/structure protection structure |
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| CN201922204786.XU CN213328983U (en) | 2019-12-11 | 2019-12-11 | Soft soil foundation prepressing drainage consolidation field peripheral building/structure protection structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530597A (en) * | 2021-07-22 | 2021-10-22 | 淮北矿业（集团）有限责任公司 | Stress barrier type mining subsidence area earth surface structure protection method |
| CN113832953A (en) * | 2021-10-25 | 2021-12-24 | 广州市设计院集团有限公司 | Method for reducing influence of vacuum preloading on surrounding environment |
-
2019
- 2019-12-11 CN CN201922204786.XU patent/CN213328983U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530597A (en) * | 2021-07-22 | 2021-10-22 | 淮北矿业（集团）有限责任公司 | Stress barrier type mining subsidence area earth surface structure protection method |
| CN113832953A (en) * | 2021-10-25 | 2021-12-24 | 广州市设计院集团有限公司 | Method for reducing influence of vacuum preloading on surrounding environment |
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