CN211113807U - Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect - Google Patents
Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect Download PDFInfo
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- CN211113807U CN211113807U CN201921966400.2U CN201921966400U CN211113807U CN 211113807 U CN211113807 U CN 211113807U CN 201921966400 U CN201921966400 U CN 201921966400U CN 211113807 U CN211113807 U CN 211113807U
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- frozen soil
- transformer substation
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- 239000002689 soil Substances 0.000 title claims abstract description 51
- 230000007547 defect Effects 0.000 title claims abstract description 16
- 239000004567 concrete Substances 0.000 title claims abstract description 14
- 239000004746 geotextile Substances 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
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- 239000011435 rock Substances 0.000 description 2
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- 239000002131 composite material Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model provides a frozen soil of transformer substation melts sinks defect and remedies concrete foundation structure, include the foundation ditch of digging out the defective position, be equipped with filling structure in the foundation ditch, filling structure includes multilayer geotechnological bag, fills frozen soil in the geotechnological bag. The structure can improve the stability of the foundation, plays a role in protecting buildings on the frozen soil layer, and is low in production and maintenance cost.
Description
Technical Field
The utility model belongs to the technical field of the construction, in particular to frozen soil of transformer substation melts sinks defect and remedies concrete foundation structure.
Background
The frozen soil area of China occupies a large part of the area of the national soil, the frozen soil is a multiphase complex system which is cemented by ice and has special properties, and compared with other soils, the frozen soil has the biggest characteristic that the properties of water, heat and force are unstable. At present, the buildings constructed in large-scale frozen soil areas are damaged, mainly the natural water heat balance of the sprayed frozen soil is damaged by warming of atmospheric temperature and artificial activities, the upper limit of the frozen soil moves downwards for many years, an ice layer melts, the ground surface sinks, and finally the structures deform and collapse. The frost heaving and thawing sinking phenomena caused by frozen soil affect the stability of buildings and can adversely affect the engineering construction, so that the dangers must be overcome for human construction activities such as engineering construction and the like. The requirements in this respect are particularly reflected in the power industry, the erection of transmission lines, the construction of substations and the like.
When buildings are built on the ground where the thawing and sinking phenomena easily occur, a new idea of 'actively cooling a frozen soil roadbed and actively protecting the frozen soil for many years' is provided in 2004, a traditional 'passive heat preservation' theory is broken through, a sunshade roadbed mainly based on regulation and control of radiation, a rock block substrate roadbed mainly based on regulation and control of convection, a rock block (crushed) slope protection roadbed and a pipeline ventilation roadbed, a heat pipe roadbed mainly based on regulation and control of conduction, a heat preservation plate-heat pipe composite roadbed, a dry bridge adopted in a frozen soil area with extremely high temperature and high ice content and other engineering measures are developed, and great success is achieved in the stability maintenance of the frozen soil roadbed of the Qinghai-Tibet roads and the railway in a low-cost and environment-friendly mode.
However, the positive effect of the thermal insulation layer subgrade on reducing the heat absorption of the subgrade body is not continuously effective all the year round, and the positive effect is only exerted in the warm season when the external temperature is higher than the internal temperature of the subgrade body and the temperature gradient tends to increase the temperature of the subgrade body. The broken stone and the piece stone roadbed have larger demand on stones, and whether stones which are suitable for mining and meet the performance of various aspects such as strength exist nearby is a problem to be considered during design. The hot rod basically does not work in warm seasons (the hot rod works only when the temperature fluctuation generates negative temperature and the temperature difference at the two ends of the hot rod exceeds the starting temperature difference), and the timeliness of the engineering measure is also very strong. The hot rod engineering measures have high engineering cost and are easy to corrode by rainwater and soil, so that the problems of corrosion resistance treatment and durability become problems to be solved by the engineering measures.
In summary, the existing engineering technical measures (such as heat insulation layers, heat pipes/rods, ventilation pipes and the like) have some effects, but further research and verification are needed for the construction measures of the permafrost under the foundation of the transformer substation.
Disclosure of Invention
The utility model aims to solve the technical problem that a transformer substation frozen soil melts sinks defect and remedies concrete foundation structure is provided, improves the stability of ground, plays the effect of the building on the protection frozen soil layer, and production and maintenance cost are low.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a concrete foundation structure is remedied to transformer substation frozen soil thaw settlement defect, includes the foundation ditch of digging the defective position, is equipped with filling structure in the foundation ditch, and filling structure includes multilayer geotechnological bag, and the geotechnological bag is filled with frozen soil.
In a preferred scheme, the outer layer of the filling structure is provided with a transition layer.
In a preferred scheme, the transition layer is sand gravel or a mixture of sand gravel and lime soil.
In a preferred scheme, fillers are arranged between the geotextile bags.
In a preferred scheme, the filler is sand gravel.
In a preferred scheme, the geotextile bag is made of polyethylene.
The utility model provides a pair of transformer substation frozen soil melts sinks defect and remedies concrete foundation structure has following advantage:
1. the structure is simple and stable, the bearing capacity is high, the stability of the foundation can be effectively improved, and the structure safety is ensured;
2. the gaps among the geotextile bags can quickly discharge the seepage water, and the adverse effect of the underground water can be effectively reduced;
3. the invention has the advantages that the required materials are simple and easy to obtain, the construction can be realized only by the polyethylene geotextile bag and the sand gravel filler, and the cost can be saved for engineering construction;
4. the construction process is simple, the requirements on construction climate and construction equipment are low, and the engineering construction cost can be further saved.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: the foundation pit comprises a foundation pit 1, a soil engineering bag 2, frozen soil 3, a transition layer 4 and a filler 5.
Detailed Description
As shown in figure 1, a concrete foundation structure is remedied to frozen soil thaw collapse defect of transformer substation, includes the foundation ditch 1 that excavates the defective part, is equipped with filling structure in the foundation ditch 1, and filling structure includes multilayer geotechnological bag 2, and the intussuseption of geotechnological bag 2 is frozen soil 3. The size of the geotextile bag 2 is 80cm x 65cm, the geotextile bag is made of polyethylene (PP) material, and the performance indexes are as follows: gram weight: not less than 100g/m2, the color is black, and the binding band is used for binding the mouth of the bag. The tying belt is small and exquisite, is convenient and quick to use, more importantly has high tensile strength, and can ensure the integrity and long-term effectiveness of the geotextile bag.
The geobag arrangement mode is for adopting the mode of artifical laying, and the successive layer is arranged from bottom to top, digs out the defect part that will melt at the frozen soil region that needs to handle at first, forms foundation ditch 1, and two-layer geobag 2 is spread earlier to 1 bottom in foundation ditch to reach the problem that reduces the inhomogeneous settlement of frozen soil layer ground, and geobag 2 adopts artifical the laying, and the successive layer is ground with small-size dull and stereotyped vibration and is carried out flattening, compaction, and upper and lower layer geobag 2 requires the fissure of displacement to lay.
The construction process of the geotextile bag technology mainly comprises three aspects of manufacturing, laying and rolling the geotextile bag, and the mutual connection work among all working procedures can be well coordinated through reasonable field construction organization, so that the optimal construction efficiency is achieved. The geotextile bags can be laid and rolled in a manual and mechanical integrated mode or a mode of matching machines with manual work. The basic principle is that in order to ensure that the geotextile bags have enough extension space in the compaction process, a gap of 5-10cm is reserved between geotextile bag bodies of the same layer, and after each layer is laid, a reverse bucket is used for carrying out static pressure on the geotextile bag surface for 1-2 times. The upper and lower geotextile bags should be paved at staggered seams.
Preferably, the outer layer of the filling structure is provided with a transition layer 4. The transition layer 4 is sand gravel or a mixture of sand gravel and lime soil. When the phenomenon of thermal fusion subsidence occurs, the transition layer 4 can discharge accumulated water in time, so that the geotextile bags can play a role to maintain strength, and the influence on buildings on the foundation is reduced to the minimum. Meanwhile, due to the existence of the lime soil, the lime soil has stronger strength after being compacted, can resist dynamic load and soil pressure when being used as a part of a foundation, and can play a role in seepage prevention.
Preferably, a filler 5 is arranged between the geotextile bags 2.
The filler 5 is sand gravel or fine granules of excavated raw soil. The compactness of the stacking of the soil engineering bags 2 can be ensured by backfilling the fillers between the soil engineering bags 2, namely between the soil engineering bags 2 or between the soil engineering bags 2 on the same layer.
Claims (6)
1. The utility model provides a concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect which characterized in that: the foundation pit structure comprises a foundation pit (1) with a defect part excavated, wherein a filling structure is arranged in the foundation pit (1), the filling structure comprises a plurality of layers of soil engineering bags (2), and frozen soil (3) is filled in the soil engineering bags (2).
2. The concrete foundation structure for remedying the frozen soil thaw collapse defect of the transformer substation according to claim 1, wherein: the outer layer of the filling structure is provided with a transition layer (4).
3. The concrete foundation structure for remedying the frozen soil thaw collapse defect of the transformer substation according to claim 2, wherein: the transition layer (4) is sand gravel or a mixture of sand gravel and lime soil.
4. The concrete foundation structure for remedying the frozen soil thaw collapse defect of the transformer substation according to claim 1, wherein: and fillers (5) are arranged between the geotextile bags (2).
5. The concrete foundation structure for remedying the frozen soil thaw collapse defect of the transformer substation according to claim 4, wherein: the filler (5) is sand gravel.
6. The concrete foundation structure for remedying the frozen soil thaw collapse defect of the transformer substation according to claim 1, wherein: the material of the geotextile bag (2) is polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921966400.2U CN211113807U (en) | 2019-11-14 | 2019-11-14 | Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921966400.2U CN211113807U (en) | 2019-11-14 | 2019-11-14 | Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect |
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| Publication Number | Publication Date |
|---|---|
| CN211113807U true CN211113807U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921966400.2U Active CN211113807U (en) | 2019-11-14 | 2019-11-14 | Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700335A (en) * | 2019-11-14 | 2020-01-17 | 国家电网有限公司 | Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect |
| CN114775571A (en) * | 2022-05-24 | 2022-07-22 | 国网甘肃省电力公司经济技术研究院 | Method for preparing low-permeability gradient thermal insulation foundation by utilizing solidified polluted clay |
-
2019
- 2019-11-14 CN CN201921966400.2U patent/CN211113807U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700335A (en) * | 2019-11-14 | 2020-01-17 | 国家电网有限公司 | Concrete foundation structure is remedied to transformer substation frozen soil thaw collapse defect |
| CN114775571A (en) * | 2022-05-24 | 2022-07-22 | 国网甘肃省电力公司经济技术研究院 | Method for preparing low-permeability gradient thermal insulation foundation by utilizing solidified polluted clay |
| CN114775571B (en) * | 2022-05-24 | 2024-04-19 | 国网甘肃省电力公司经济技术研究院 | Method for preparing hypotonic gradient heat-insulating foundation by using solidified polluted clay |
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