CN213805319U - Large-thickness virtual filling collapsible loess foundation treatment structure - Google Patents
Large-thickness virtual filling collapsible loess foundation treatment structure Download PDFInfo
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- CN213805319U CN213805319U CN202021392355.7U CN202021392355U CN213805319U CN 213805319 U CN213805319 U CN 213805319U CN 202021392355 U CN202021392355 U CN 202021392355U CN 213805319 U CN213805319 U CN 213805319U
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Abstract
The utility model discloses a collapsible loess foundation processing structure is filled out to heavy gauge deficiency belongs to ground processing technology field, has solved the problem that the heavy gauge deficiency collapsible loess foundation processing method of conventional heavy gauge is difficult to satisfy its operating mode demand completely. The utility model discloses a crowded close pile body, squeeze into original state ground bearing layer after crowded close pile body passes shallow layer rammed area and deep layer compaction district, crowded close pile body includes crowded close section of steel-pipe pile and the crowded close section of secondary expansion, has filled different materials in crowded close section of steel-pipe pile and the crowded close section of secondary expansion respectively, and the crowded close section of steel-pipe pile is located shallow layer rammed area, and the crowded close section of secondary expansion is located crowded close zone of secondary and original state ground bearing layer in situ, and crowded close pile body top is laid and is had semi-rigid mattress pad layer. The utility model has good control effect on the settlement and deformation of the large-thickness virtual filling collapsible loess foundation; the utility model discloses avoided filling out greatly and digging the current situation in the collapsible loess ground treatment process of heavy gauge virtual filling, the construction is simple, the time limit for a project is short.
Description
Technical Field
The utility model belongs to the technical field of the ground is handled, concretely relates to collapsible loess ground processing structure is filled out to heavy gauge deficiency.
Background
Due to the fact that the large-thickness virtual filling collapsible loess foundation is large in virtual filling thickness, insufficient in compactness and serious in wet collapse, if the large-thickness virtual filling collapsible loess foundation is not thoroughly treated, large-scale settlement is easily caused after construction, and the safety and the use safety of the structure on the large-thickness virtual filling collapsible loess foundation are affected. At present, the problem that the bearing capacity cannot reach the corresponding standard in the treatment of the large-thickness weak filling collapsible loess foundation, and particularly the deep post-construction settlement is difficult to eradicate is solved. According to the working condition of the large-thickness virtual filling collapsible loess foundation treatment, the conditions of short construction period, thorough deep sedimentation treatment, small social influence and environmental influence and the like need to be met, and the working condition requirements of the conventional large-thickness virtual filling collapsible loess foundation treatment methods such as an excavation backfill method, a lime soil pile method, a dynamic compaction method and the like are difficult to completely meet in the large-thickness virtual filling collapsible loess foundation treatment process. Therefore, a novel efficient large-thickness virtual filling collapsible loess foundation treatment structure needs to be proposed by researchers in the engineering technology field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a collapsible loess foundation processing structure is filled out to heavy gauge deficiency to solve the problem that the heavy gauge deficiency collapsible loess foundation processing method of filling out of conventional is difficult to satisfy its operating mode demand completely.
The technical scheme of the utility model is that: a large-thickness virtual filling wet-subsidence loess foundation treatment structure comprises a compaction pile body, wherein the compaction pile body penetrates through a shallow tamping area and a deep tamping area and then is driven into an original ground bearing layer, the compaction pile body comprises a steel pipe pile compaction section and a secondary expansion compaction section, different materials are respectively poured into the steel pipe pile compaction section and the secondary expansion compaction section, the steel pipe pile compaction section is located in the shallow tamping area, the secondary expansion compaction section is located in the deep tamping area and the original ground bearing layer, and a semi-rigid mattress layer is paved at the top of the compaction pile body.
As a further improvement, the thickness of the semi-rigid mattress pad is 30 cm-50 cm.
As a further improvement, the semi-rigid mattress layer is made of cement stabilized soil or cement stabilized macadam.
As a further improvement of the utility model, the distance between adjacent compaction pile bodies is 1.2 m-1.5 m.
As a further improvement of the utility model, the compaction pile body is formed by driving a steel pipe pile into the pile body by a pile driver to extrude the surrounding soil body.
As the utility model discloses a further improvement, the potting material in the crowded section of secondary expansion adopts the strong expansibility material of curing process, and the inflation volume is 1.5 times ~2 times of material self volume.
As a further improvement, the filling material in the steel pipe pile compaction section adopts lime soil, soil mixture or graded gravel.
As a further improvement of the utility model, the shallow tamping area is formed by adopting a dynamic compaction method or a high-speed hydraulic compaction method.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model improves the overall mechanical performance of the large-thickness virtual filling collapsible loess foundation, has the advantages of physical reaction and chemical reaction with the water in the foundation, and can achieve the purposes of dewatering inside the foundation and compacting the deep foundation through the water-absorbing expansion secondary of the expansion material; the utility model discloses subside, the deformation to filling up collapsible loess foundation to the deficiency of big thickness has fine control effect.
2. The utility model discloses the structure is used for the treatment of the virtually collapsible loess foundation of filling up of heavy gauge, and its deep zone territory post-construction settlement can be eliminated to the crowded section of secondary expansion, improves foundation self bearing capacity.
3. The utility model discloses avoided filling out greatly and digging the current situation in the collapsible loess ground treatment process of heavy gauge virtual filling, the construction is simple, the time limit for a project is short, and natural environment and social environmental influence are little.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
fig. 2 is a plan view of the present invention.
In the figure: 1-a semi-rigid mattress layer; 2-compaction of pile body; 3-shallow layer tamping zone; 4-deep packing zone; 5-undisturbed foundation bearing stratum; 6-steel pipe pile compaction section; 7-secondary expansion compaction section.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the large-thickness virtual filling collapsible loess foundation treatment structure comprises a compaction pile body 2, wherein the compaction pile body 2 penetrates through a shallow tamping area 3 and a deep tamping area 4 and then is driven into an original ground bearing layer 5, the compaction pile body 2 comprises a steel pipe pile compaction section 6 and a secondary expansion compaction section 7, different materials are respectively poured into the steel pipe pile compaction section 6 and the secondary expansion compaction section 7, the steel pipe pile compaction section 6 is positioned in the shallow tamping area 3, the secondary expansion compaction section 7 is positioned in the deep tamping area 4 and the original ground bearing layer 5, and a semi-rigid mattress layer 1 is paved at the top of the compaction pile body 2.
The thickness of the semi-rigid mattress layer 1 is 30 cm-50 cm. The semi-rigid mattress layer 1 adopts cement-stabilized soil or cement-stabilized broken stones.
The distance d between adjacent compacted pile bodies 2 is 1.2 m-1.5 m. The compaction pile body 2 is formed by driving a steel pipe pile into a surrounding soil body by a pile driver.
The filling material in the secondary expansion compaction section 7 is a strong expansibility material in a curing process, and the expansion volume is 1.5-2 times of the volume of the material.
The filling material in the steel pipe pile compaction section 6 adopts lime soil, three-combination soil or graded gravel.
The shallow layer tamping zone 3 is formed by adopting a dynamic compaction method or a high-speed hydraulic compaction method.
The construction method comprises the following steps: after a shallow tamping area 3 is treated by a dynamic compaction method or a high-speed hydraulic compaction method, a steel pipe pile penetrates through the shallow tamping area 3 and a deep compaction area 4 by a pile driver and then is driven into an original ground bearing layer 5 to obtain a compacted pile body 2, a high-expansibility material is poured at the lower section of the compacted pile body 2 to form a secondary expansion compaction section 7 in the process of curing, lime soil, triblend soil or graded gravel is poured at the upper section of the compacted pile body 2 to form a steel pipe pile compaction section 6, then a semi-rigid mattress layer 1 is paved above the compacted pile body 2 and cured, and finally a large-thickness virtual filling wet-subsidence yellow soil foundation treatment structure is obtained.
Claims (8)
1. The utility model provides a heavy gauge virtual filling collapsible loess foundation processing structure, includes the crowded close pile body, its characterized in that: the steel pipe pile compaction pile is characterized in that the compaction pile body (2) penetrates through a shallow layer tamping area (3) and a deep layer compaction area (4) and then is driven into an original ground bearing layer (5), the compaction pile body (2) comprises a steel pipe pile compaction section (6) and a secondary expansion compaction section (7), different materials are respectively poured into the steel pipe pile compaction section (6) and the secondary expansion compaction section (7), the steel pipe pile compaction section (6) is located in the shallow layer tamping area (3), the secondary expansion compaction section (7) is located in the deep layer compaction area (4) and the original ground bearing layer (5), and a semi-rigid mattress layer (1) is laid on the top of the compaction pile body (2).
2. The large-thickness virtual filling collapsible loess foundation treatment structure as claimed in claim 1, wherein: the thickness of the semi-rigid mattress layer (1) is 30 cm-50 cm.
3. The large-thickness virtual filling collapsible loess foundation treatment structure as set forth in claim 1 or 2, wherein: the semi-rigid mattress layer (1) adopts cement stabilized soil or cement stabilized macadam.
4. The large-thickness virtual filling collapsible loess foundation treatment structure as claimed in claim 1, wherein: the distance between adjacent compacted pile bodies (2) is 1.2 m-1.5 m.
5. The large-thickness virtual filling collapsible loess foundation treatment structure as set forth in claim 1 or 4, wherein: the compaction pile body (2) is formed by driving a pile driver into the steel pipe pile to extrude the surrounding soil body.
6. The large-thickness virtual filling collapsible loess foundation treatment structure as claimed in claim 1, wherein: the filling material in the secondary expansion compaction section (7) is a strong expansibility material in a curing process, and the expansion volume is 1.5-2 times of the volume of the material.
7. The large-thickness virtual filling collapsible loess foundation treatment structure as set forth in claim 1 or 6, wherein: the pouring material in the steel pipe pile compaction section (6) adopts lime soil, triblend soil or graded gravel.
8. The large-thickness virtual filling collapsible loess foundation treatment structure as claimed in claim 1, wherein: the shallow tamping zone (3) is formed by adopting a dynamic compaction method or a high-speed hydraulic compaction method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021392355.7U CN213805319U (en) | 2020-07-15 | 2020-07-15 | Large-thickness virtual filling collapsible loess foundation treatment structure |
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| CN202021392355.7U CN213805319U (en) | 2020-07-15 | 2020-07-15 | Large-thickness virtual filling collapsible loess foundation treatment structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699965A (en) * | 2021-08-10 | 2021-11-26 | 中建铁路投资建设集团有限公司 | Combined reinforcement construction method for high-fill plain soil soft foundation |
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2020
- 2020-07-15 CN CN202021392355.7U patent/CN213805319U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699965A (en) * | 2021-08-10 | 2021-11-26 | 中建铁路投资建设集团有限公司 | Combined reinforcement construction method for high-fill plain soil soft foundation |
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