CN113846527A - Overwintering protection coiled material for seasonal frozen soil engineering and construction method - Google Patents
Overwintering protection coiled material for seasonal frozen soil engineering and construction method Download PDFInfo
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- CN113846527A CN113846527A CN202111150919.5A CN202111150919A CN113846527A CN 113846527 A CN113846527 A CN 113846527A CN 202111150919 A CN202111150919 A CN 202111150919A CN 113846527 A CN113846527 A CN 113846527A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
Abstract
The invention discloses a seasonal frozen soil engineering overwintering protection coiled material and a construction method, wherein a high-efficiency overwintering protection coiled material is formed by the cooperative operation of a heat insulation coiled material and a moisture absorption coiled material, and from the mechanism of seasonal frozen soil generation, the moisture absorption coiled material absorbs excessive moisture in a near-surface soil layer to avoid the moisture in the near-surface soil layer from freezing and developing downwards; the heat preservation coiled material is covered above the moisture absorption coiled material for heat preservation, so that the temperature close to the surface of the ground is effectively kept, and frost heaving damage is prevented. On the basis of traditional single heat preservation, the invention increases the function of absorbing water in soil of the near-surface area of the project, fundamentally prevents frost heaving disasters, and scientifically and effectively plays a better heat preservation and anti-freezing effect; the near-surface soil layer fully dried by the moisture-absorbing coiled material becomes a part of the whole heat-insulating system, and the formation of seasonal frozen soil is further prevented.
Description
Technical Field
The invention relates to the technical field of foundation pit engineering, in particular to a winter protection coiled material for seasonal frozen soil engineering and a construction method.
Background
Water in soil layers of continental monsoon areas in northern temperate zones of China is frozen into ice crystals under the condition of negative temperature in winter, so that the volume of the soil body is expanded to form seasonal frozen soil, and the construction method has adverse effects on engineering construction of road embankments, road beds, buildings or structures and the like.
The road and foundation engineering project in the seasonally frozen earth area is generally characterized in that a heat insulation material is covered on a soil layer reserved on the exposed earth surface of the engineering to prevent the embankment, the roadbed or the foundation from being damaged by freezing. The conventional overwintering heat-insulating material is a benzene plate or bagged perlite, the benzene plate is measured in blocks, the benzene plate is convenient to transport and construct, the area is usually small, the joints are more and difficult to process, the integrity of a heat-insulating area cannot be ensured, and the brittle benzene plate is easy to damage in the laying or dismantling process; the perlite in the bag has a heat preservation effect by means of filling, and the overwintering heat preservation efficiency is low and the engineering heat preservation effect is general.
Therefore, in order to prevent and eliminate frost heaving damage risks of road engineering and foundation engineering in seasonal frozen soil regions and ensure that engineering projects smoothly live through the winter, a convenient, economical and efficient seasonal frozen soil engineering overwintering protective coiled material and a construction method are urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a winter protection coiled material for seasonal frozen soil engineering and a construction method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a winter protection coiled material for seasonal frozen soil engineering, which is sequentially provided with a fireproof waterproof coiled material, a heat preservation coiled material and a moisture absorption coiled material from top to bottom;
the heat-insulating coiled material comprises a heat-insulating material; the first protective layer and the bonding protective layer are sequentially wrapped outside the heat-insulating material; the first protective layer is a waterproof sealing material and is provided with a one-way vent valve; the heat insulation material consists of perlite, high-strength fiber and nano silicon dioxide aerosol; the perlite is granular and is used as a substrate of the heat insulation material, and is wrapped by a layer of high-strength fiber, and the outer side of the high-strength fiber is completely coated with nano silicon dioxide aerosol;
the moisture absorption coiled material is sequentially a first moisture absorption coiled material and a second moisture absorption coiled material from top to bottom; the first moisture absorption coiled material comprises a first moisture absorption material, the second moisture absorption coiled material comprises a second moisture absorption material, and a second protective layer and a bonding protective layer are sequentially wrapped outside the first moisture absorption material and the second moisture absorption material; the second protective layer is made of a breathable material; the first type of moisture absorption material is a recyclable moisture absorption material, and the second type of moisture absorption material is a moisture absorption heat release material; the bottom of the second moisture absorption coiled material is tightly attached to the ground surface of the engineering site;
the heat-preservation coiled material and the first moisture-absorption coiled material are connected with the second moisture-absorption coiled material through the bonding protective layer; the bonding protective layer is a breathable self-bonding protective layer, is mainly used for protecting materials wrapped inside, and prevents relative movement after adhesion, and can be detached and replaced if worn;
the fireproof and waterproof coiled material is a covering layer with waterproof and fireproof functions and is laid above the heat-insulating coiled material.
Further, the one-way vent valve only vents air and does not admit air; the strength of the high-strength fiber adopted by the heat-insulating material meets the design requirement, and the coiled material is allowed to deform moderately but not be damaged in the laying process; the coiled material formed by the heat-insulating material and the first protective layer is integrated and can be repeatedly recycled.
Furthermore, the first moisture absorption material is nano carbon, and can be recycled after being subjected to dehumidification treatment;
the second moisture absorption material is a mixture of calcium oxide powder and iron powder, wherein the content of the iron powder is 5% by mass; stearic acid is wrapped outside the iron powder particles, so that the reaction of the iron powder with air and water can be delayed; after the calcium oxide powder reacts with water and air to form calcium hydroxide and calcium carbonate, the calcium oxide powder effectively absorbs water and releases heat, and gradually absorbs stearic acid on the surface of the iron powder, so that the iron powder is in contact with the air, heat is further uniformly and slowly released, and a better heating effect is achieved;
the first moisture absorption material and the second protective layer of the first moisture absorption coiled material are integrated; the second type of moisture absorption material and the second protective layer of the second moisture absorption coiled material are integrated; the second protective layer is not hardened or aged after dehumidification treatment; if the second protective layer is damaged, a second protective layer can be added outside the damaged second protective layer for repair.
Furthermore, the thickness of the heat-preservation coiled material, the thickness of the first moisture-absorption coiled material and the thickness of the second moisture-absorption coiled material can be increased in a spreading mode according to requirements; if the stratum water content of the engineering field is higher, the number of layers of the first moisture absorption coiled material and the second moisture absorption coiled material can be properly increased; if the engineering field is extremely cold, the number of layers of the heat-insulating coiled material and the second moisture-absorbing coiled material can be properly increased; the total paving thickness of the heat-preservation coiled material, the first moisture-absorbing coiled material and the second moisture-absorbing coiled material is determined by the design requirement of anti-freezing and overwintering.
Furthermore, the heat-insulating coiled material, the moisture-absorbing coiled material and the fireproof waterproof coiled material are wide coiled materials; the lap joint width of the heat preservation coiled material and the moisture absorption coiled material is not less than 300mm, and the lap joint part is fixed in a gland way; the lap joint width of the fireproof waterproof coiled material is not less than 500mm, the lap joints are hermetically connected, and square timbers or soil bags are pressed to prevent rainwater or snow water from entering the fireproof waterproof coiled material; the circumference sides of the heat-insulating coiled material, the moisture-absorbing coiled material and the fireproof waterproof coiled material are fixed in an anchoring and pressing cover mode, and the waterproof treatment of an anchoring point is required to be noticed during anchoring.
The invention also provides a construction method of the overwintering protection coiled material for the seasonal frozen soil engineering, which comprises the following steps:
(1) aiming at engineering construction projects such as roads, buildings and foundations of structures which can not be continuously constructed in the seasonal frozen soil region due to winter, the engineering bare earth surface is subjected to heat preservation and anti-freezing construction; after reserving a soil layer above the design elevation of the engineering project, carrying out site leveling construction, and cleaning construction waste and accumulated water on the surface of the engineering project to ensure that the construction waste and the accumulated water are clean, free of foreign matters and free of accumulated water; laying temperature measuring points at the characteristic part of the engineering ground surface;
(2) paving wide second moisture absorption coiled materials, flatly paving the second moisture absorption coiled materials along one direction, overlapping the second moisture absorption coiled materials one by one according to the width of the field, tightly adhering the bonding protective layers of the second moisture absorption coiled materials at the overlapping position after leveling, and adopting a square wood gland;
(3) the number of layers of the second moisture absorption coiled material is determined according to the design requirement of freezing prevention and overwintering, and the operation of the step (2) is repeated to finish the laying of the second moisture absorption coiled material; checking the laying effect of the second moisture absorption coiled material, and performing the next construction after the second moisture absorption coiled material is checked to be qualified;
(4) paving wide first moisture absorption coiled materials, flatly paving the first moisture absorption coiled materials along one direction, overlapping the first moisture absorption coiled materials one by one according to the width of a field, tightly adhering bonding protective layers of the first moisture absorption coiled materials at the overlapping position after leveling, and adopting a square wood gland;
(5) determining the number of layers of the first moisture absorption coiled material according to the design requirement of freezing prevention and overwintering, and repeating the operation in the step (4) to finish the laying of the first moisture absorption coiled material; checking the laying effect of the first moisture absorption coiled material, and performing the next construction after the first moisture absorption coiled material is checked to be qualified;
(6) paving wide heat-insulating coiled materials, flatly paving the heat-insulating coiled materials along one direction, overlapping the heat-insulating coiled materials one by one according to the width of a field, wherein the bonding protective layers of the heat-insulating coiled materials at the overlapping part are tightly bonded after being leveled, and adopting square wood glands;
(7) repeating the operation in the step (6) according to the number of layers of the heat-insulating coiled materials required by the anti-freezing and overwintering design to finish the laying of the heat-insulating coiled materials; checking the laying effect of the heat-insulating coiled material, and performing the next construction after the heat-insulating coiled material is checked to be qualified;
(8) paving wide fireproof and waterproof coiled materials, flatly paving the wide fireproof and waterproof coiled materials along one direction, overlapping the wide fireproof and waterproof coiled materials one by one according to the width of a field, and pressing the flat fireproof and waterproof coiled materials at the overlapping position by square timbers or soil bags; checking the laying effect of the fireproof waterproof coiled material, and performing the next construction after the fireproof waterproof coiled material is checked to be qualified;
(9) anchoring and soil body gland fixation are carried out on the peripheral sides of the heat-insulating coiled material, the moisture-absorbing coiled material and the fireproof waterproof coiled material, and the waterproof treatment of an anchoring point is noticed;
(10) arranging a drainage channel on the fireproof waterproof coiled material laid in a large area, and connecting the drainage channel with a drainage system of an engineering field to finish the laying construction of the overwintering protective coiled material of the seasonal frozen soil engineering;
(11) and after the engineering project overwintering is finished, sequentially removing the fireproof waterproof coiled material, the heat-insulation coiled material, the first moisture-absorption coiled material and the second moisture-absorption coiled material, and recovering the surfaces of all the coiled materials after the surfaces of all the coiled materials are cleaned and dried for later use.
Further, in the step (4), the first moisture absorption coiled material is subjected to moisture removal treatment before being laid, is in a fully dry state, plays a better moisture absorption role, and further improves the heat preservation and anti-freezing effects.
Further, in the steps (2) to (10), the lap joints of the heat-insulating coiled material, the first moisture-absorbing coiled material, the second moisture-absorbing coiled material and the fireproof waterproof coiled material are staggered, and if a low-lying area needs to be erected by using square timbers and the like, the heat-insulating coiled material, the first moisture-absorbing coiled material, the second moisture-absorbing coiled material and the fireproof waterproof coiled material are laid continuously; in the steps (3), (5), (7) and (8), the inspection of the heat-insulating coiled material, the first moisture-absorbing coiled material, the second moisture-absorbing coiled material and the fireproof waterproof coiled material mainly comprises the inspection of the integrity and the lapping quality of the coiled materials; in the steps (6) - (9), the first protective layer of the heat-insulating coiled material and the fireproof waterproof coiled material are sealed and airtight; in the steps (6) and (7), the one-way vent valve of the heat-insulating coiled material is communicated with the atmosphere, and the waterproof treatment is taken into consideration.
Further, in the step (9), the thickness of the soil body gland on the peripheral sides of the heat-insulating coiled material, the first moisture-absorbing coiled material, the second moisture-absorbing coiled material and the fireproof waterproof coiled material is not less than 0.5 m; and (10) arranging a drainage channel on the fireproof and waterproof roll material to avoid the lap joint of the roll material, and combining the square timber frame at the bottom to form a drainage slope to realize drainage.
Further, in the step (11), the first moisture-absorbing coiled material is recovered for standby use, and is not subjected to moisture removal treatment, and is subjected to sufficient moisture removal treatment before next laying; after the second moisture absorption coiled material is sequentially disassembled, the second protective layer and the bonding protective layer can be repeatedly used, and the second moisture absorption material can be used as a backfill material after being mixed with a soil body.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the efficient overwintering protection coiled material is formed by the cooperative operation of the heat insulation coiled material and the moisture absorption coiled material, and on the basis of a mechanism of seasonal frozen soil generation, the moisture absorption coiled material absorbs excessive moisture in a near-surface soil layer, so that the moisture in the near-surface soil layer is prevented from freezing and developing downwards, and meanwhile, the near-surface water absorption process stabilizes and releases heat in a trace manner, so that the improvement of the air temperature in a coiled material covering layer is facilitated, and the formation and development of the frozen soil are further prevented; the heat preservation coiled material is covered above the moisture absorption coiled material for heat preservation, so that the temperature close to the surface of the ground can be effectively kept, and frost heaving damage can be prevented. On the basis of traditional single heat preservation, the function of absorbing water in soil in the near-surface area of the project is added, so that frost heaving disasters are prevented fundamentally, and better heat preservation and anti-freezing effects are achieved scientifically and effectively; on the other hand, the near-surface soil layer fully dried by the moisture-absorbing coiled material also becomes a part of the whole heat-insulating system in a certain sense, and the formation of seasonal frozen soil is further prevented.
2. The first type of moisture absorption material is nano carbon, and the first type of moisture absorption material can be recycled after moisture removal treatment; the second protective layer is not hardened or aged after dehumidification treatment, if the second protective layer is damaged, the second protective layer can be reused after repair, and the method is environment-friendly and economical.
3. The second moisture absorption material is a mixture of calcium oxide powder and iron powder, and stearic acid is wrapped outside iron powder particles, so that the reaction of the iron powder with air and water can be delayed; after calcium oxide reacts with water and air to form calcium hydroxide and calcium carbonate, the calcium hydroxide and the calcium carbonate gradually absorb water and release heat, so that stearic acid on the surface of the iron powder is absorbed, the iron powder is contacted with the air, heat is further uniformly and slowly released, better heating and moisture absorption effects are achieved, and the overwintering performance of the coiled material is greatly improved.
4. The heat insulation material consists of perlite, high-strength fiber and nano silicon dioxide aerosol; the perlite is granular, is used as a matrix of the heat insulation material and also is a main body of the heat insulation material, and is economical and practical; the perlite matrix is wrapped by a layer of high-strength fibers, the nano-silica aerosol is completely coated on the outer sides of the high-strength fibers, the heat insulation effect of the heat insulation material can be effectively improved, meanwhile, the high-strength fibers can well coordinate the deformation of the two materials aiming at the particle property of perlite particles and the brittleness characteristic of the nano-silica aerosol, the material characteristics of the heat insulation coiled material are improved, and the heat insulation coiled material is not easy to damage in the laying process.
5. The heat-insulating coiled material, the first moisture-absorbing coiled material, the second moisture-absorbing coiled material and the fireproof waterproof coiled material are wide flexible coiled materials, so that the laying construction is convenient, the materials are durable and economical, and the materials are convenient to recycle; if the bonding protective layer is worn, the bonding protective layer can be replaced; if the hollow is encountered, the concrete can be laid continuously after being erected; the coiled materials of each layer are connected through the self-adhesive bonding protective layer, mutual displacement between the laid coiled materials can be effectively prevented, and the integrity and the heat preservation effect of heat preservation protection can be effectively guaranteed in the mode that the periphery of the coiled materials is anchored through the waterproof material and the earthing gland cover.
6. The heat-insulating coiled material, the first moisture-absorbing coiled material and the second moisture-absorbing coiled material can increase the required number of layers according to the design requirement of anti-freezing and overwintering so as to adapt to different engineering intervals and the requirement of engineering anti-freezing, effectively cope with the situation that the stratum water content of an engineering field is higher or extremely cold weather is encountered, and have wide application range.
7. The laying of the fireproof waterproof coiled material and the arrangement of the drainage channel on the fireproof waterproof coiled material are convenient for rainwater or snow water to be drained in time, can effectively avoid the phenomenon that a soil layer is soaked after rainfall or snowfall and melting occurs, possibly reduce the heat preservation effect or damage of icing occurs, and ensure the overwintering protection effect of the engineering; furthermore, fire can be prevented, and the safe overwintering of the project can be guaranteed.
8. According to the invention, the temperature measuring points are arranged at the characteristic parts of the engineering ground surface, the temperature data in the engineering overwintering process is collected, and if the temperature data meets the low-temperature alarm of the engineering ground surface below the overwintering protective coiled material, the temperature data can be timely processed by adopting a countermeasure and can be cooperated with the overwintering protective coiled material to form a comprehensive overwintering protective system, so that smooth and safe overwintering of the engineering can be comprehensively and effectively realized.
9. In the invention, the heat-insulating coiled material and the fireproof waterproof coiled material can be directly recycled after surface drying; the first moisture absorption coiled material is recovered for standby, and can be fully dehumidified before next laying without being dehumidified; after the second moisture absorption coiled material is disassembled, the second protective layer and the bonding protective layer can be dried and then directly reused, and the second moisture absorption material can be used as a backfill material after being mixed with a soil body, so that the requirements of green, low carbon, environmental protection and sustainable development are met.
Drawings
FIG. 1 is a schematic view of a protective roll for wintering in seasonally frozen soil engineering;
FIG. 2 is a schematic view of an insulating web;
FIG. 3 is a schematic view of a first absorbent web;
FIG. 4 is a schematic view of a second absorbent roll;
in the figure, a heat insulation coiled material 1, a heat insulation material 1-1, a first protective layer 1-2, a bonding protective layer 2, a first moisture absorption coiled material 3, a first moisture absorption material 3-1, a second protective layer 3-2, a second moisture absorption coiled material 4, a second moisture absorption material 4-1 and a fireproof waterproof coiled material 5.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the overwintering protection coiled material for the seasonal frozen soil engineering provided by the embodiment of the invention sequentially comprises a fireproof waterproof coiled material 5, a heat preservation coiled material 1 and a moisture absorption coiled material from top to bottom;
the heat insulation coiled material 1 comprises a heat insulation material 1-1; the outer side of the heat insulation material 1-1 is sequentially wrapped with a first protective layer 1-2 and a bonding protective layer 2; the first protective layer 1-2 is a waterproof sealing material and is provided with a one-way vent valve; the heat insulation material 1-1 consists of perlite, high-strength fiber and nano silicon dioxide aerosol; the perlite is granular and is used as a matrix of the heat insulation material 1-1 and is wrapped by a layer of high-strength fiber, and the outer side of the high-strength fiber is completely coated with nano silicon dioxide aerosol;
the moisture absorption coiled material is sequentially provided with a first moisture absorption coiled material 3 and a second moisture absorption coiled material 4 from top to bottom; the first moisture absorption coil 3 comprises a first moisture absorption material 3-1, the second moisture absorption coil 4 comprises a second moisture absorption material 4-1, and a second protective layer 3-2 and a bonding protective layer 2 are sequentially wrapped outside the first moisture absorption material 3-1 and the second moisture absorption material 4-1; the second protective layer 3-2 is made of a breathable material; the first type of moisture absorption material 3-1 is a recyclable moisture absorption material, and the second type of moisture absorption material 4-1 is a moisture absorption heat release material; the bottom of the second moisture absorption coiled material 4 is tightly attached to the ground surface of the engineering field;
the heat preservation coiled material 1 and the first moisture absorption coiled material 3 as well as the first moisture absorption coiled material 3 and the second moisture absorption coiled material 4 are connected through the bonding protective layer 2; the bonding protective layer 2 is a breathable self-bonding protective layer, is mainly used for protecting materials wrapped inside, and prevents relative movement after adhesion, and can be detached and replaced if worn;
the fireproof and waterproof coiled material 5 is a covering layer with waterproof and fireproof functions and is laid above the heat-insulating coiled material 1.
Specifically, the one-way vent valve only vents air and does not admit air; the strength of the high-strength fibers adopted by the heat-insulating material 1-1 meets the design requirement, and the coiled material is allowed to deform moderately but is not damaged in the laying process; the coiled material consisting of the heat insulation material 1-1 and the first protective layer 1-2 is integrated and can be recycled.
Specifically, the first moisture absorption material 3-1 is nanocarbon, and can be recycled after being subjected to dehumidification treatment;
the second moisture absorption material 4-1 is a mixture of calcium oxide powder and iron powder, wherein the iron powder accounts for 5% of the mass fraction; stearic acid is wrapped outside the iron powder particles, so that the reaction of the iron powder with air and water can be delayed; after the calcium oxide powder reacts with water and air to form calcium hydroxide and calcium carbonate, the calcium oxide powder effectively absorbs water and releases heat, and gradually absorbs stearic acid on the surface of the iron powder, so that the iron powder is in contact with the air, heat is further uniformly and slowly released, and a better heating effect is achieved;
the first type moisture absorption material 3-1 and the second protective layer 3-2 of the first moisture absorption coiled material 3 are integrated; the second type of absorbent material 4-1 and the second protective layer 3-2 of the second absorbent coiled material 4 are integrated; the second protective layer 3-2 is not hardened or aged after dehumidification treatment; if the second protective layer 3-2 is damaged, a second protective layer 3-2 can be added outside the damaged second protective layer 3-2 for repair.
Specifically, the heat-insulating roll 1, the first moisture-absorbing roll 3 and the second moisture-absorbing roll 4 can be increased in thickness in a spreading manner according to requirements; if the stratum water content of the engineering field is higher, the number of layers of the first moisture absorption coiled material 3 and the second moisture absorption coiled material 4 can be properly increased; if the engineering field is extremely cold, the number of layers of the heat-insulating coiled material 1 and the second moisture-absorbing coiled material 4 can be properly increased; the total laying thickness of the heat preservation coiled material 1, the first moisture absorption coiled material 3 and the second moisture absorption coiled material 4 is determined by the design requirement of freezing prevention and overwintering.
Specifically, the heat-insulating coiled material 1, the moisture-absorbing coiled material and the fireproof waterproof coiled material 5 are wide coiled materials; the lap joint width of the heat preservation coiled material 1 and the moisture absorption coiled material is not less than 300mm, and the lap joint part is fixed in a gland manner; the lap joint width of the fireproof waterproof coiled material 5 is not less than 500mm, the lap joints are hermetically connected, and square timbers or soil bags are pressed to prevent rainwater or snow water from entering the fireproof waterproof coiled material; the peripheral sides of the heat-insulating coiled material 1, the moisture-absorbing coiled material and the fireproof waterproof coiled material 5 are fixed in an anchoring and pressing cover mode, and the waterproof treatment of an anchoring point is noticed during anchoring.
The embodiment of the invention also provides a construction method of the overwintering protection coiled material for the seasonal frozen soil engineering, which comprises the following steps:
(1) aiming at engineering construction projects such as roads, buildings and foundations of structures which can not be continuously constructed in the seasonal frozen soil region due to winter, the engineering bare earth surface is subjected to heat preservation and anti-freezing construction; after reserving a soil layer above the design elevation of the engineering project, carrying out site leveling construction, and cleaning construction waste and accumulated water on the surface of the engineering project to ensure that the construction waste and the accumulated water are clean, free of foreign matters and free of accumulated water; laying temperature measuring points at the characteristic part of the engineering ground surface;
(2) paving wide second moisture absorption coiled materials 4, flatly paving the second moisture absorption coiled materials in one direction, overlapping the second moisture absorption coiled materials one by one according to the width of a field, and tightly adhering the bonding protective layers 2 of the second moisture absorption coiled materials 4 at the overlapping position after leveling, and adopting square wood pressing covers;
(3) the number of layers of the second moisture absorption coiled material 4 is determined according to the design requirement of freezing prevention and overwintering, and the operation of the step (2) is repeated to finish the laying of the second moisture absorption coiled material 4; the laying effect of the second moisture absorption coiled material 4 is checked, and the next construction is carried out after the second moisture absorption coiled material is checked to be qualified;
(4) paving wide first moisture absorption coiled materials 3, flatly paving the first moisture absorption coiled materials in one direction, overlapping the first moisture absorption coiled materials one by one according to the width of a field, wherein the bonding protective layers 2 of the first moisture absorption coiled materials 3 at the overlapping position are tightly adhered after being leveled, and adopting square wood glands;
(5) the number of layers of the first moisture absorption coiled material 3 is determined according to the design requirement of freezing prevention and overwintering, and the operation of the step (4) is repeated to finish the laying of the first moisture absorption coiled material 3; checking the laying effect of the first moisture absorption coiled material 3, and performing the next construction after the first moisture absorption coiled material is checked to be qualified;
(6) paving a wide heat-insulating coiled material 1, flatly paving along one direction, overlapping one by one according to the width of a field, wherein a bonding protective layer 2 of the heat-insulating coiled material 1 at the overlapping part is tightly adhered after being leveled, and adopting a square wood gland;
(7) according to the number of layers of the heat-insulation coiled material 1 required by the anti-freezing and overwintering design, repeating the operation in the step (6) to finish the laying of the heat-insulation coiled material 1; checking the laying effect of the heat-insulating coiled material 1, and performing the next construction after the heat-insulating coiled material is checked to be qualified;
(8) paving wide fireproof and waterproof coiled materials 5, flatly paving the materials in one direction, overlapping the materials one by one according to the width of a field, and pressing the fireproof and waterproof coiled materials 5 at the overlapped part by square timbers or soil bags after the materials are flatly paved; checking the laying effect of the fireproof waterproof coiled material 5, and performing the next construction after the fireproof waterproof coiled material is checked to be qualified;
(9) anchoring and soil body pressing and fixing are carried out on the peripheral sides of the heat-insulating coiled material 1, the moisture-absorbing coiled material and the fireproof and waterproof coiled material 5, and the waterproof treatment of anchoring points is paid attention to;
(10) arranging a drainage channel on the fireproof waterproof coiled material 5 laid in a large area, and connecting the drainage channel with a drainage system of an engineering field to finish the laying construction of the overwintering protective coiled material of the seasonal frozen soil engineering;
(11) after the engineering project overwintering is finished, the fireproof and waterproof coiled material 5, the heat preservation coiled material 1, the first moisture absorption coiled material 3 and the second moisture absorption coiled material 4 are sequentially detached, and the surfaces of various coiled materials are cleaned and dried and then are recovered for later use.
Specifically, in the step (4), the first moisture absorbing coil 3 should be subjected to moisture removal treatment before being laid, and is in a sufficiently dry state, so that a better moisture absorbing effect is achieved, and further, the heat preservation and anti-freezing effects are improved.
Specifically, in the steps (2) to (10), the lap joints of the heat-insulating coiled material 1, the first moisture-absorbing coiled material 3, the second moisture-absorbing coiled material 4 and the fireproof waterproof coiled material 5 are staggered, and if a low-lying area needs to be erected by using square timbers and the like, the heat-insulating coiled material and the first moisture-absorbing coiled material are laid continuously; in the steps (3), (5), (7) and (8), the inspection of the heat-insulating coiled material 1, the first moisture-absorbing coiled material 3, the second moisture-absorbing coiled material 4 and the fireproof waterproof coiled material 5 mainly comprises the inspection of the integrity and the lapping quality of the coiled materials; in the steps (6) - (9), the first protective layer 1-2 of the heat-insulating coiled material 1 and the fireproof waterproof coiled material 5 are sealed and airtight; in the steps (6) and (7), the one-way vent valve of the heat-insulating coiled material 1 is communicated with the atmosphere, and the waterproof treatment is taken into consideration.
Specifically, in the step (9), the thickness of the soil body gland on the peripheral sides of the heat preservation coiled material 1, the first moisture absorption coiled material 3, the second moisture absorption coiled material 4 and the fireproof waterproof coiled material 5 is not less than 0.5 m; in the step (10), the drainage channel on the fireproof and waterproof roll material 5 is arranged to avoid the lap joint of the roll material and form a drainage slope by combining the overhead square timber at the bottom to realize drainage.
Specifically, in the step (11), the first moisture-absorbing roll 3 is recovered for standby use, and may not be subjected to moisture removal treatment, and is subjected to sufficient moisture removal treatment before next laying; after the second moisture absorption coiled material 4 is sequentially disassembled, the second protective layer 3-2 and the bonding protective layer 2 can be reused, and the second moisture absorption material 4-1 can be used as a backfill material after being mixed with soil.
The foregoing is only a preferred embodiment of the present invention, and although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. The utility model provides a protective coiled material that seasonally frozen soil engineering overwintering which characterized in that: the fireproof waterproof coiled material (5), the heat preservation coiled material (1) and the moisture absorption coiled material are arranged from top to bottom in sequence;
the heat-insulating coiled material (1) comprises a heat-insulating material (1-1); the outer side of the heat insulation material (1-1) is sequentially wrapped with a first protective layer (1-2) and a bonding protective layer (2); the first protective layer (1-2) is a waterproof sealing material and is provided with a one-way vent valve; the heat insulation material (1-1) consists of perlite, high-strength fiber and nano silicon dioxide aerosol; the perlite is granular and is used as a heat-insulating material matrix and is wrapped by a layer of high-strength fiber, and the outer side of the high-strength fiber is completely coated with nano-silica aerosol;
the moisture absorption coiled material is sequentially provided with a first moisture absorption coiled material (3) and a second moisture absorption coiled material (4) from top to bottom; the first moisture absorption coil (3) comprises a first moisture absorption material (3-1), the second moisture absorption coil (4) comprises a second moisture absorption material (4-1), and a second protective layer (3-2) and a bonding protective layer (2) are sequentially wrapped outside the first moisture absorption material (3-1) and the second moisture absorption material (4-1); the second protective layer (3-2) is made of an air-permeable material, the first moisture absorption material (3-1) is a recyclable moisture absorption material, and the second moisture absorption material (4-1) is a moisture absorption heat release material; the bottom of the second moisture absorption coiled material (4) is tightly attached to the ground surface of the engineering site;
the heat-preservation coiled material (1) and the first moisture-absorption coiled material (3) as well as the first moisture-absorption coiled material (3) and the second moisture-absorption coiled material (4) are connected through the bonding protective layer (2); the bonding protective layer (2) is a breathable self-bonding protective layer and is used for protecting materials wrapped inside and preventing relative movement after adhesion, and the bonding protective layer can be detached and replaced if worn;
the fireproof and waterproof coiled material (5) is a covering layer with waterproof and fireproof functions and is laid above the heat-insulating coiled material (1).
2. The seasonally frozen soil engineering overwintering protection coiled material as claimed in claim 1, wherein: the one-way vent valve only exhausts air and does not intake air; the strength of the high-strength fibers adopted by the heat-insulating material (1-1) meets the design requirement, and the coiled material is allowed to deform moderately but not be damaged in the laying process; the coiled material consisting of the heat-insulating material (1-1) and the first protective layer (1-2) is integrated and can be recycled.
3. The seasonally frozen soil engineering overwintering protection coiled material as claimed in claim 1, wherein: the first moisture absorption material (3-1) is nano carbon, can be recycled and can be recycled after being subjected to dehumidification treatment;
the second moisture absorption material (4-1) is a mixture of calcium oxide powder and iron powder, wherein the iron powder accounts for 5% of the mass fraction; stearic acid is wrapped outside the iron powder particles, so that the reaction of the iron powder with air and water can be delayed; after the calcium oxide powder reacts with water and air to form calcium hydroxide and calcium carbonate, the calcium oxide powder effectively absorbs water and releases heat, and gradually absorbs stearic acid on the surface of the iron powder, so that the iron powder is in contact with the air, and further the heat is uniformly and slowly released;
the first moisture absorption material (3-1) and the second protective layer (3-2) of the first moisture absorption coiled material (3) are integrated; the second type of moisture absorption material (4-1) and the second protective layer (3-2) of the second moisture absorption coiled material (4) are integrated; the second protective layer (3-2) is not hardened or aged after dehumidification treatment; if the second protective layer (3-2) is damaged, a second protective layer (3-2) can be added outside the damaged second protective layer (3-2) for repair.
4. The seasonally frozen soil engineering overwintering protection coiled material as claimed in claim 1, wherein: the heat-preservation coiled material (1), the first moisture-absorption coiled material (3) and the second moisture-absorption coiled material (4) can be respectively increased in thickness in a spreading mode according to requirements; if the stratum water content of the engineering field is higher, the number of layers of the first moisture absorption coiled material (3) and the second moisture absorption coiled material (4) can be properly increased; if the engineering field is extremely cold, the number of layers of the heat-insulating coiled material (1) and the second moisture-absorbing coiled material (4) can be properly increased; the total laying thickness of the heat-preservation coiled material (1), the first moisture-absorption coiled material (3) and the second moisture-absorption coiled material (4) is determined by the design requirement of freezing prevention and overwintering.
5. The seasonally frozen soil engineering overwintering protection coiled material as claimed in claim 1, wherein: the heat-insulating coiled material (1), the moisture-absorbing coiled material and the fireproof waterproof coiled material (5) are wide coiled materials; the lap joint width of the heat preservation coiled material (1) and the moisture absorption coiled material is not less than 300mm, and the lap joint part is fixed in a gland manner; the lap joint width of the fireproof waterproof coiled material (5) is not less than 500mm, the lap joints are hermetically connected, and square timbers or soil bags are pressed to prevent rainwater or snow water from entering the fireproof waterproof coiled material; the circumference side of the heat-insulating coiled material (1), the moisture-absorbing coiled material and the fireproof waterproof coiled material (5) is fixed in an anchoring and pressing cover mode, and the waterproof treatment of an anchoring point is noticed during anchoring.
6. A construction method of the overwintering protection coiled material of the seasonal frozen soil engineering as claimed in any one of the claims 1 to 5, characterized in that the method comprises the following steps:
(1) aiming at engineering construction projects such as roads, buildings and foundations of structures which can not be continuously constructed in the seasonal frozen soil region due to winter, the engineering bare earth surface is subjected to heat preservation and anti-freezing construction; after reserving a soil layer above the design elevation of the engineering project, carrying out site leveling construction, and cleaning construction waste and accumulated water on the surface of the engineering project to ensure that the construction waste and the accumulated water are clean, free of foreign matters and free of accumulated water; laying temperature measuring points at the characteristic part of the engineering ground surface;
(2) paving a second wide moisture absorption coiled material (4), flatly paving along one direction, overlapping one width by one width according to the width of a field, tightly adhering a bonding protective layer (2) of the second moisture absorption coiled material (4) at the overlapping position after leveling, and adopting a square wood gland;
(3) the number of layers of the second moisture absorption coiled material (4) is determined according to the design requirement of freezing prevention and overwintering, and the operation of the step (2) is repeated to finish the laying of the second moisture absorption coiled material (4); the laying effect of the second moisture absorption coiled material (4) is checked, and the next construction is carried out after the second moisture absorption coiled material is checked to be qualified;
(4) paving wide first moisture absorption coiled materials (3), flatly paving in one direction, overlapping one by one according to the width of a field, closely adhering bonding protective layers (2) of the first moisture absorption coiled materials (3) at the overlapping position after leveling, and adopting a square wood gland;
(5) the number of layers of the first moisture absorption coiled material (3) is determined according to the design requirement of freezing prevention and overwintering, and the operation of the step (4) is repeated to finish the laying of the first moisture absorption coiled material (3); checking the laying effect of the first moisture absorption coiled material (3), and performing the next construction after the first moisture absorption coiled material is checked to be qualified;
(6) paving a wide heat-insulating coiled material (1), flatly paving along one direction, overlapping one width by one width according to the width of a field, wherein a bonding protective layer (2) of the heat-insulating coiled material (1) at the overlapping part is tightly adhered after being leveled, and adopting a square wood gland;
(7) according to the number of layers of the heat-insulation coiled material (1) required by the anti-freezing and overwintering design, repeating the operation in the step (6) to finish the laying of the heat-insulation coiled material (1); checking the laying effect of the heat-insulating coiled material (1), and performing the next construction after the heat-insulating coiled material is checked to be qualified;
(8) paving wide fireproof and waterproof coiled materials (5), flatly paving along one direction, overlapping one by one according to the width of a field, and pressing a cover by using square timbers or soil bags after the fireproof and waterproof coiled materials (5) at the overlapping part are flatly paved; checking the laying effect of the fireproof waterproof coiled material (5), and performing the next construction after the fireproof waterproof coiled material is checked to be qualified;
(9) anchoring and soil body pressing and fixing are carried out on the peripheral sides of the heat-insulating coiled material (1), the moisture-absorbing coiled material and the fireproof and waterproof coiled material (5), and the waterproof treatment of anchoring points is paid attention to;
(10) arranging a drainage channel on the fireproof waterproof coiled material (5) laid in a large area, and connecting the drainage channel with a drainage system of an engineering field to finish laying construction of the overwintering protection coiled material of the seasonal frozen soil engineering;
(11) after the engineering project overwintering is finished, the fireproof and waterproof coiled material (5), the heat-preservation coiled material (1), the first moisture-absorption coiled material (3) and the second moisture-absorption coiled material (4) are sequentially detached, and the surfaces of various coiled materials are cleaned and dried and then recovered for later use.
7. The construction method of the overwintering protection coiled material for the seasonal frozen soil engineering according to claim 6, characterized in that: in the step (4), before the first moisture-absorbing coiled material (3) is laid, the moisture-absorbing coiled material is subjected to moisture removal treatment and is in a fully dry state.
8. The construction method of the overwintering protection coiled material for the seasonal frozen soil engineering according to claim 6, characterized in that: in the steps (2) - (10), the lap joints of the heat-preservation coiled material (1), the first moisture-absorption coiled material (3), the second moisture-absorption coiled material (4) and the fireproof waterproof coiled material (5) are staggered, and if low-lying areas need to be erected by using square timbers and the like, the heat-preservation coiled material and the fireproof waterproof coiled material are laid continuously; in the steps (3), (5), (7) and (8), the checking of the heat-insulating coiled material (1), the first moisture-absorbing coiled material (3), the second moisture-absorbing coiled material (4) and the fireproof waterproof coiled material (5) mainly comprises the checking of the integrity and the lapping quality of the coiled materials; in the steps (6) - (9), the first protective layer (1-2) of the heat-insulating coiled material (1) and the fireproof waterproof coiled material (5) are sealed and airtight; in the steps (6) and (7), the one-way vent valve of the heat-insulating coiled material (1) is communicated with the atmosphere, and the waterproof treatment is paid attention.
9. The construction method of the overwintering protection coiled material for the seasonal frozen soil engineering according to claim 6, characterized in that: in the step (9), the thickness of soil body pressing covers on the peripheral sides of the heat-preservation coiled material (1), the first moisture-absorption coiled material (3), the second moisture-absorption coiled material (4) and the fireproof waterproof coiled material (5) is not less than 0.5 m; and (10) arranging a drainage channel on the fireproof and waterproof coiled material (5) to avoid the lap joint of the coiled material, and combining the square timber frame at the bottom to form a drainage slope to realize drainage.
10. The construction method of the overwintering protection coiled material for the seasonal frozen soil engineering according to claim 6, characterized in that: in the step (11), the first moisture-absorbing coiled material (3) is recovered for standby, and is not subjected to moisture removal treatment, and is subjected to full moisture removal treatment before next laying; after the second moisture absorption coiled material (4) is sequentially disassembled, the second protective layer (3-2) and the bonding protective layer (2) can be reused, and the second moisture absorption material (4-1) can be used as a backfill material after being mixed with soil.
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