CN215482975U - Overhead overwintering protection structure for easily accumulated water area at bottom of seasonal frozen soil foundation pit - Google Patents
Overhead overwintering protection structure for easily accumulated water area at bottom of seasonal frozen soil foundation pit Download PDFInfo
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- CN215482975U CN215482975U CN202121630820.0U CN202121630820U CN215482975U CN 215482975 U CN215482975 U CN 215482975U CN 202121630820 U CN202121630820 U CN 202121630820U CN 215482975 U CN215482975 U CN 215482975U
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Abstract
The utility model relates to an overhead overwintering protection structure for an area where water is easily accumulated at the bottom of a seasonal frozen soil foundation pit, which comprises an overhead overwintering protection bag, a protection layer, a drainage channel and a heat-preservation anti-freezing layer, wherein the protection bag is arranged at the bottom of the foundation pit; the aerial overwintering protection bag consists of an air inflation bag, an air inlet valve and an air outlet valve, and is arranged in an area which is easy to accumulate water at the bottom of the foundation pit; the air inlet valve and the air outlet valve are provided with a gas pressure control module, a flow rate control module and a temperature test module; the protective layer is a covering layer with heat preservation, waterproof and fireproof functions and is laid at the bottom of a foundation pit in a seasonally frozen soil area; the protective layer is provided with a waterproof exhaust hole. The utility model has the beneficial effects that: the overhead overwintering protection bag is an active overwintering protection structure, and can effectively prevent and treat frost heaving damage disasters of soil bodies and foundation bottom plates of regions easy to accumulate water at the bottom of the foundation pit in seasonal frozen soil regions in time.
Description
Technical Field
The utility model relates to the technical field of foundation pit engineering, in particular to an overhead overwintering protection structure for an area where water is easily accumulated at the bottom of a seasonal frozen soil foundation pit.
Background
In the northern temperate zone continental monsoon region of China, the temperature is lower in winter, so that the soil body is frozen and is thawed in the next spring, and the influence range of the frozen soil is generally dozens of centimeters to several meters below the ground, so that seasonal frozen soil is formed.
The water in the soil body of the seasonal frozen soil layer is frozen into ice crystals under the condition of negative temperature in winter, so that the volume of the soil body is expanded, and then frost heaving damage of the foundation slab is caused, and the safety of the foundation structure is damaged. The conventional winter maintenance measures for foundation pit engineering in seasonal frozen soil areas generally cover heat-insulating materials on a soil layer reserved at the bottom of a foundation pit or a foundation trench to prevent the bottom of the foundation from being frozen, and belong to passive overwintering protection measures. Once frost heaving damage occurs in the overwintering protection weak area of the foundation pit engineering, the frost heaving risk is difficult to directly eliminate.
Therefore, in order to prevent and timely treat frost heaving damage to the soil body at the bottom of the foundation pit and the foundation slab in the seasonal frozen soil area and ensure smooth overwintering of foundation pit engineering and safety and reliability of the foundation structure, an overhead overwintering protection structure suitable for an effective foundation pit bottom area with easy water accumulation in the seasonal frozen soil area is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide an overhead overwintering protection structure for an area where water is easily accumulated at the bottom of a seasonal frozen soil foundation pit.
The overhead overwintering protection structure for the area where water is easily accumulated at the bottom of the seasonal frozen soil foundation pit comprises an overhead overwintering protection bag, a protection layer, a drainage channel and a heat-preservation anti-freezing layer;
the aerial overwintering protection bag consists of an air inflation bag, an air inlet valve and an air outlet valve, and is arranged in an area which is easy to accumulate water at the bottom of the foundation pit; the air inlet valve and the air outlet valve are provided with a gas pressure control module, a flow rate control module and a temperature test module;
the protective layer is a covering layer with heat preservation, waterproof and fireproof functions and is laid at the bottom of a foundation pit in a seasonally frozen soil area; the protective layer is provided with a waterproof exhaust hole;
the drainage groove is in continuous waterproof lap joint with the peripheral side of the protective layer and is connected with a drainage system;
the heat-preservation and anti-freezing layer is laid on a soil layer of an area which is easy to accumulate water at the bottom of the foundation pit, and the heat-preservation and anti-freezing layer is composed of a straw mat and a perlite bag from bottom to top in sequence.
Preferably, the method comprises the following steps: and temperature measuring points are arranged at the characteristic parts of the bottom of the foundation pit in the protective layer.
Preferably, the method comprises the following steps: the heating air pump connected with the air inlet valve is arranged outside the protective layer; and the air inlet valve is connected with the heating air pump through a heat preservation air pipe.
Preferably, the method comprises the following steps: the protective layer is composed of waterproof cloth and fireproof cloth from bottom to top; the fireproof cloth and the waterproof cloth are selected to be consistent in width and laid along one direction, the overlapping width of the waterproof cloth is not less than 500mm, and the overlapping length of the fireproof cloth is not less than 300 mm; the lap joints of the fireproof cloth and the waterproof cloth are hermetically connected; the lap joint of the fireproof cloth is covered with square wood or soil bags.
Preferably, the method comprises the following steps: and the lap joint part of the periphery of the protective layer and the drainage groove is fixed at the bottom of the foundation pit through an anchoring or pressing cover.
The utility model has the beneficial effects that:
1. the overhead overwintering protection bag is an active overwintering protection structure, and can effectively prevent and treat soil mass and foundation slab frost heaving damage disasters in easily accumulated water areas (such as water collecting pits, independent foundation overbreak areas and the like) at the bottom of the foundation pit in seasonal frozen soil areas in time.
2. The waterproof cloth and the fireproof cloth in the protective layer can effectively avoid the situation that the heat preservation effect is reduced after the soil layer is soaked after rainwater or snow melts, and the overwintering protection effect is ensured; the fireproof cloth can further prevent fire hazard and ensure the safe overwintering of foundation pit engineering.
3. According to the utility model, the air temperature of the water accumulation-prone area (such as a water collecting pit, an independent foundation overexcavation area and the like) provided with the overhead overwintering protection bag is ensured to be higher than 0 ℃ by circulating the heated air in the inflatable bag, so that frost heaving damage to soil bodies and a foundation slab of the water accumulation-prone area is effectively prevented.
4. According to the utility model, the heated gas exhausted by the overhead overwintering protection bag is exhausted through the waterproof exhaust hole after circulating in the protection layer, so that the air temperature in the protection layer is improved, and the frost heaving risk is reduced; the inflatable overhead overwintering protection bag can play an overhead role, can ensure that accumulated water or accumulated snow on the protection layer can be smoothly discharged into the drainage channel, and is convenient for collecting and discharging rainwater or snow water in time; after the overwintering protection is finished, the aerial overwintering protection bag can be conveniently stored after gas is exhausted; the overhead overwintering protection bag is lighter than the traditional square wood overhead material, is multipurpose, and is convenient to store and lay.
5. The straw mat and the perlite bag of the heat-preservation and anti-freezing layer are in a fully dry state before being laid, and can absorb redundant moisture in soil mass at the bottom of the foundation pit after being laid, so that accumulated water in the soil mass is reduced, a better heat-preservation and anti-freezing effect can be achieved to a certain extent, and the frost heaving damage risk of the soil mass and the foundation slab is reduced.
6. The protective layer, the drainage groove, the overhead overwintering protective bag and the heat-preservation anti-freezing layer can be recycled, so that the energy is saved, the environment is protected, and the requirements of energy conservation and emission reduction in green construction sites are met.
Drawings
FIG. 1 is a schematic diagram of an overhead overwintering protection structure of a region where water is easily accumulated at the bottom of a seasonal frozen soil foundation pit;
FIG. 2 is a schematic view of an overhead overwintering protection bladder.
Description of reference numerals: the air-conditioning water-saving building foundation pit comprises an overhead overwintering protection bag 1, an air-filled bag 1-1, an air inlet valve 1-2, an air outlet valve 1-3, a protective layer 2, a drainage groove 3, a heat-preservation anti-freezing layer 4, a foundation pit bottom water accumulation area 5 and a foundation pit bottom 6.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the utility model. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As an embodiment, the overhead overwintering protection structure of the region easy to accumulate water at the bottom of the seasonal frozen soil foundation pit comprises an overhead overwintering protection bag 1, a protection layer 2, a drainage channel 3 and a heat-preservation and anti-freezing layer 4.
The overhead overwintering protection bag 1 consists of an air inflation bag 1-1, an air inlet valve 1-2 and an air outlet valve 1-3 and is arranged in an area 5 (such as a water collecting pit, an independent foundation overexcavation area and the like) which is easy to accumulate water at the bottom of a foundation pit. The air inlet valve 1-2 and the air outlet valve 1-3 are provided with a gas pressure control module, a flow rate control module and a temperature test module, and can control the air pressure and the flow rate of the air entering and exiting the air bag 1-1 and measure the air temperature of the air entering and exiting the air bag 1-1.
The protective layer 2 is a covering layer with heat preservation, waterproof and fireproof functions, is laid at the bottom 6 of a foundation pit in a seasonally frozen soil area and serves as a main overwintering protection body. The protective layer 2 is provided with a waterproof exhaust hole for exhausting redundant gas.
The water drainage groove 3 is in continuous waterproof lap joint with the peripheral side of the protective layer 2 and is connected with a water drainage system, and the auxiliary protective layer 2 collects and drains water.
When the temperature in the protective layer 2 is higher than 0 ℃, the air inlet valve 1-2 and the air outlet valve 1-3 are closed after the air bag 1-1 is filled with air, and the pressure value of the air in the air bag 1-1 is kept within a certain range; when the temperature in the protective layer 2 is lower than 0 ℃, heated air is injected into the air bag 1-1 through the air inlet valve 1-2 by the heating air pump, the air in the air bag 1-1 is discharged through the air outlet valve 1-3, the pressure value of the air in the air bag 1-1 is ensured to be maintained in a certain range, and the temperature of the air discharged from the air bag 1-1 is not lower than 0 ℃.
The heat-preservation and anti-freezing layer 4 is laid on a soil layer of an area 5 (such as a water collecting pit, an independent foundation overbreak area and the like) which is easy to accumulate water at the bottom of the foundation pit, and is sequentially provided with a straw mat and a perlite bag from bottom to top.
After a soil layer is reserved above the designed elevation of the bottom of the foundation pit before the overhead overwintering protection structure of the easily accumulated water area at the bottom of the seasonal frozen soil foundation pit is laid, cleaning the construction waste and accumulated water at the bottom 6 of the foundation pit to ensure that the foundation pit is clean, free of foreign matters and free of accumulated water; and temperature measuring points are arranged at the characteristic parts of the bottom 6 of the foundation pit in the protective layer 2.
Before the overhead overwintering protection bag 1 is laid, the air tightness should be checked, and after the air tightness is tested to be qualified, the bag can be used; the heating air pump is arranged outside the protective layer 2, and insulation and fire prevention protection measures are taken; the air inlet valve 1-2 is connected with the heating air pump through a heat preservation air pipe; when the low pressure in the air bag 1-1 is lower than the set value, gas is injected into the air bag 1-1 through the air inlet valve 1-2, so that the gas pressure value in the air bag 1-1 is kept at the set value.
Measuring the temperature of the air in the protective layer 2 every day, when the temperature in the protective layer 2 is lower than 0 ℃, injecting heated air into the air bag 1-1 through the air inlet valve 1-2 by the heating air pump, and discharging the air in the air bag 1-1 through the air outlet valve 1-3, so as to ensure that the pressure value of the air in the air bag 1-1 is maintained within a certain range, and the temperature of the discharged air in the air bag 1-1 is not lower than 0 ℃; the air inlet valve 1-2 is positioned in the protective layer 2; the gas in the protective layer 2 is circulated through the gas exhausted by the gas-filled bag 1-1, so that the soil body at the bottom 6 of the foundation pit and the foundation bottom plate under the condition of extremely cold weather are effectively prevented from being frozen and damaged; the temperature of the gas exiting through the inlet valve 1-2 should be lower than the withstand temperature of the protective layer 2.
The pressure value range of the gas in the inflating bag 1-1 is determined by the strength and the overlying pressure of the inflating bag 1-1; the air pressure and flow rate of the air entering and exiting the air bag 1-1 and the temperature of the heated air entering the air bag 1-1 are determined according to field tests; the temperature of the heated air does not exceed the bearing temperature of the main body and parts of the overhead overwintering protection bag 1.
The protective layer 2 is made of waterproof cloth and fireproof cloth from bottom to top; the fireproof cloth and the waterproof cloth are uniform in width and are laid along one direction, the lap joint width of the waterproof cloth is not less than 500mm, and the lap joint length of the fireproof cloth is not less than 300 mm; the lap joints of the fireproof cloth and the waterproof cloth are hermetically connected, so that rainwater or snow water is prevented from being immersed; the lap joint of the fireproof cloth is covered with square wood or soil bags.
The lap joint part of the periphery of the protective layer 2 and the drainage channel 2 is fixed at the bottom 6 of the foundation pit by means of anchoring or pressing covers.
The straw mat and the perlite bag of the heat-preservation and anti-freezing layer 4 are in a fully dry state before being laid, so that a better heat-preservation and anti-freezing effect is achieved; the thickness of the straw mat and the perlite bag is determined by the anti-freezing requirement.
After the winter period of the foundation pit engineering is finished, cleaning sundries and water on the protective layer 2 and keeping the dry and tidy state; the air bag 1-1 discharges air, and the link of the heating air pump and the air inlet valve 1-2 is disconnected; the overhead overwintering protective bag 1, the protective layer 2, the drainage channel 3 and the heat-preservation antifreezing layer 4 are recycled in sequence; the straw mat and the perlite bag of the heat-preservation and anti-freezing layer 4 need to be dried and then recycled.
The inflatable overhead overwintering protection bag 1 plays an overhead role and is used for ensuring that accumulated water or accumulated snow on the protection layer 2 is smoothly discharged into the drainage channel 3, so that rainwater or snow water can be collected and discharged in time.
Claims (5)
1. Easy ponding regional overhead protective structure that overwintering at bottom of seasonally frozen soil foundation ditch, its characterized in that: comprises an overhead overwintering protection bag (1), a protection layer (2), a drainage groove (3) and a heat-preservation antifreezing layer (4);
the aerial overwintering protection bag (1) consists of an air inflation bag (1-1), an air inlet valve (1-2) and an air outlet valve (1-3), and the aerial overwintering protection bag (1) is arranged in an area (5) where water is easy to accumulate at the bottom of a foundation pit; the air inlet valve (1-2) and the air outlet valve (1-3) are provided with a gas pressure control module, a flow rate control module and a temperature test module;
the protective layer (2) is a covering layer with heat preservation, waterproof and fireproof functions and is laid at the bottom (6) of a foundation pit in a seasonally frozen soil area; the protective layer (2) is provided with a waterproof exhaust hole;
the periphery of the drainage groove (3) is continuously in waterproof lap joint with the periphery of the protective layer (2), and the drainage groove (3) is connected with a drainage system;
the heat-preservation and anti-freezing layer (4) is laid on a soil layer of the area (5) which is easy to accumulate water at the bottom of the foundation pit, and the heat-preservation and anti-freezing layer (4) is composed of a straw mat and perlite bags from bottom to top in sequence.
2. The overhead overwintering protection structure for the easily accumulated water area at the bottom of the seasonal frozen soil foundation pit as claimed in claim 1, is characterized in that: temperature measuring points are arranged at characteristic positions in the protective layer (2) at the bottom (6) of the foundation pit.
3. The overhead overwintering protection structure for the easily accumulated water area at the bottom of the seasonal frozen soil foundation pit as claimed in claim 1, is characterized in that: the heating air pump connected with the air inlet valve (1-2) is arranged outside the protective layer (2); the air inlet valve (1-2) is connected with the heating air pump through a heat preservation air pipe.
4. The overhead overwintering protection structure for the easily accumulated water area at the bottom of the seasonal frozen soil foundation pit as claimed in claim 1, is characterized in that: the protective layer (2) is composed of waterproof cloth and fireproof cloth from bottom to top; the fireproof cloth and the waterproof cloth are selected to be consistent in width and laid along one direction, the overlapping width of the waterproof cloth is not less than 500mm, and the overlapping length of the fireproof cloth is not less than 300 mm; the lap joints of the fireproof cloth and the waterproof cloth are hermetically connected; the lap joint of the fireproof cloth is covered with square wood or soil bags.
5. The overhead overwintering protection structure for the easily accumulated water area at the bottom of the seasonal frozen soil foundation pit as claimed in claim 1, is characterized in that: the lap joint part of the periphery of the protective layer (2) and the drainage groove (3) is fixed at the bottom of the foundation pit (6) through an anchoring or a gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121630820.0U CN215482975U (en) | 2021-07-16 | 2021-07-16 | Overhead overwintering protection structure for easily accumulated water area at bottom of seasonal frozen soil foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121630820.0U CN215482975U (en) | 2021-07-16 | 2021-07-16 | Overhead overwintering protection structure for easily accumulated water area at bottom of seasonal frozen soil foundation pit |
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| Publication Number | Publication Date |
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| CN215482975U true CN215482975U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121630820.0U Active CN215482975U (en) | 2021-07-16 | 2021-07-16 | Overhead overwintering protection structure for easily accumulated water area at bottom of seasonal frozen soil foundation pit |
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| CN (1) | CN215482975U (en) |
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2021
- 2021-07-16 CN CN202121630820.0U patent/CN215482975U/en active Active
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