CN113585493A - Construction method for external waterproof layer of underground structural engineering - Google Patents
Construction method for external waterproof layer of underground structural engineering Download PDFInfo
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- CN113585493A CN113585493A CN202110679870.6A CN202110679870A CN113585493A CN 113585493 A CN113585493 A CN 113585493A CN 202110679870 A CN202110679870 A CN 202110679870A CN 113585493 A CN113585493 A CN 113585493A
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- 239000010410 layer Substances 0.000 claims description 125
- 239000004567 concrete Substances 0.000 claims description 70
- 239000011241 protective layer Substances 0.000 claims description 29
- 239000004570 mortar (masonry) Substances 0.000 claims description 24
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- 239000011449 brick Substances 0.000 claims description 10
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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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
- E02D31/02—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 against ground humidity or ground water
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Abstract
The invention relates to the technical field of building construction, in particular to a construction method of an external waterproof layer of an underground structural engineering, which comprises bottom plate waterproof construction, side wall waterproof construction and top plate waterproof construction, wherein the bottom plate waterproof construction and the top plate waterproof construction are constructed by adopting a dry paving method, and the side wall waterproof construction is constructed by adopting a wet paving method; the method has the function of resisting tree root puncture by arranging the root puncture resistant layer on the top plate, and is suitable for external waterproofing of underground structural engineering below a green belt. The method can improve the paving quality of the waterproof coiled material and ensure the paving efficiency of the waterproof coiled material; particularly, the side wall waterproof coiled material is wet-paved, the coiled material is fully adhered and closely attached with polymer cement mortar, and the coiled material is densely paved, has no hollowness and is prevented from slipping. The method has the advantages that the construction process is simple, field workers can easily understand and operate the method, different paving methods are adopted for different parts, the advantages and the disadvantages are compatible, the construction quality is guaranteed, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of an external waterproof layer of underground structural engineering.
Background
The outer waterproof layers of the bottom plate, the side wall and the top plate of the underground structural engineering, for example, are generally constructed by paving a coil and brushing waterproof paint.
The existing 'construction method for spraying external water-proof of a film on a bottom plate of a comprehensive pipe gallery' (patent application number: CN202011367968.X), the invention only aims at the method for processing the water-proof of the internal corner of a guide wall and a side wall, and has the disadvantages of complicated construction process, inflexible operation and low construction speed.
A known waterproof construction method outside a cross type comprehensive pipe gallery (patent application number CN202011162000.3) only aims at waterproof treatment of a construction joint with a side wall at a certain distance from a bottom plate and a top plate; the construction limitation is large, the process is complicated, the construction speed is not favorably improved, and the laying of the waterproof material does not solve the control of the laying construction quality in a humid environment and the quality control of the laying of the waterproof coiled material when the wall base surface is uneven.
The above-mentioned prior art method for constructing an external waterproof layer of an underground structural engineering has various inconveniences and problems, which are undesirable to those skilled in the art.
Disclosure of Invention
Aiming at the existing problems, the invention discloses a construction method of an external waterproof layer of an underground structural engineering, which comprises the following steps of bottom plate waterproof construction, side wall waterproof construction and top plate waterproof construction:
the waterproof construction of the bottom plate comprises the following steps:
step S11, performing a construction process of the concrete cushion layer to form the concrete cushion layer on the bottom plate;
step S12, after a layer of base layer treating agent is coated on the concrete cushion layer, a bottom plate waterproof coiled material is paved on the concrete cushion layer;
step S13, forming a bottom plate fine aggregate concrete protective layer on the bottom plate waterproof roll;
the side wall waterproof construction comprises the following steps:
step S21, cleaning the side wall base layer and determining a coil paving datum line of the side wall;
step S22, according to the coil paving datum line of the side wall, coating polymer cement mortar on the side wall base layer, and paving a side wall waterproof coil on the polymer cement mortar;
step S23, forming a waterproof mortar protective layer on the side wall waterproof roll;
step S24, building bricks on the outer side of the waterproof mortar protective layer to form a brick protective layer;
the roof waterproof construction comprises the following steps:
step S31, cleaning the top plate base layer, coating a layer of cold bottom oil on the top plate base layer, and popping up a coiled material of the top plate on the top plate base layer to lay a reference line;
step S32, paving a top plate waterproof roll on the top plate base layer according to the roll paving datum line of the top plate;
step S33, paving a root-resistant layer on the waterproof roll of the top plate;
and step S34, forming a top plate fine aggregate concrete protective layer on the root penetration resistant layer.
Preferably, the step S11 specifically includes:
after the sidelines of the concrete cushion are measured and released, a template of the concrete cushion is arranged on the bottom plate, and the height of the template of the concrete cushion is the height of a concrete pouring surface; wherein, the template of the concrete cushion layer adopts wood purlin, and the straight-line segment template is fixed once every 1m, and the curve change segment template is fixed once every 0.5 m;
and pouring concrete in the template of the concrete cushion layer, and vibrating while pouring to form the concrete cushion layer.
Preferably, the base plate waterproof roll is a double-sided self-adhesive polymer modified asphalt waterproof layer;
in step S12, the step of laying the waterproof bottom sheet roll on the concrete cushion includes:
the method comprises the following steps that (1) isolation paper of a bottom plate waterproof coiled material is lifted from the back side from one end, two persons pull the lifted isolation paper uniformly and forcefully to pull out the whole pair of isolation paper, meanwhile, part of the bottom plate waterproof coiled material with the lifted isolation paper is pasted on a concrete cushion layer, and the bottom plate waterproof coiled material is rolled by adopting a rubber roller before and after the bottom plate waterproof coiled material is pasted;
the lapping width of the adjacent bottom plate waterproof coiled materials is larger than or equal to 80mm, the adjacent bottom plate waterproof coiled materials are lapped by a glue joint belt, a first reinforcing layer is arranged at the position of a male corner and a female corner of the bottom plate and the side wall, and the width of the first reinforcing layer is 300-500 mm.
Preferably, in the step S22,
the step of preparing the polymer cement mortar comprises:
according to the following steps of 1: 10, mixing the polymer master batch and cement in a mass ratio of 0.4, and uniformly stirring the mixture and water to obtain a slurry mixed solution;
and stirring the slurry mixed solution by using an electric stirrer, uniformly stirring, and standing for 5-8 min, wherein the stirring time is 1-2 min.
Preferably, the side wall waterproof roll is a double-sided self-adhesive polymer modified asphalt waterproof layer;
in the step S22, removing the isolation film on the lower surface of the side wall waterproof roll, spreading the side wall waterproof roll on the painted polymer cement mortar, painting the next polymer cement mortar after one roll is completely paved, paving the next side wall waterproof roll, and after paving, using a trowel or a rubber plate to flap and press the upper surface of the side wall waterproof roll so as to enable the side wall waterproof roll to be tightly adhered to the mortar;
the lap joint width of the adjacent side wall waterproof coiled materials is larger than or equal to 80mm, a second reinforcing layer is arranged at the position of a chamfer angle formed by the side wall and the top plate in a joint mode, and the width of the second reinforcing layer is 300-500 mm.
Preferably, in step S23, a waterproof mortar protective layer is coated on the side wall waterproof roll from the bottom to the top, and the coating height is less than or equal to 1.2m each day.
Preferably, in step S24, bricks are laid from two ends of the side wall to the middle of the side wall outside the waterproof mortar protection layer to form a brick protection layer, and the height of each day of laying is less than or equal to 1 m.
Preferably, the roof waterproof roll is a double-sided self-adhesive polymer modified asphalt waterproof layer;
in step S32, the top sheet is aligned with the reference line, the separation paper of the top sheet waterproof roll is lifted from the back side from one end, two persons pull the lifted separation paper and pull it backward to pull out the whole separation paper, and part of the top sheet waterproof roll is adhered to the top sheet base layer, and the bottom sheet waterproof roll is rolled by the rubber roller before and after the top sheet waterproof roll is laid
Wherein, the overlapping width of the waterproof coiled materials of the adjacent top plates is more than or equal to 80 mm.
Preferably, in step S33, the adjacent root penetration resistant layers are joined by thermal welding.
Preferably, the underground structural engineering is an underground comprehensive pipe gallery, an underground underpass tunnel or an underground ventilation shaft.
Compared with the prior art, the invention has the following advantages or beneficial effects:
the top plate is provided with the root puncture resistant layer, so that the tree root puncture resistant roof has the effect of resisting tree root puncture, and is suitable for external waterproofing of underground structural engineering below a green belt.
The paving quality of the waterproof coiled material can be improved, and the paving efficiency of the waterproof coiled material is ensured; particularly, the side wall waterproof coiled material is wet-paved, the coiled material is fully adhered and closely attached with polymer cement mortar, and the coiled material is densely paved, has no hollowness and is prevented from slipping.
And thirdly, the construction process is simple, field workers can easily understand and operate the construction process conveniently, different paving methods are adopted for different parts, advantages and disadvantages are compatible, the construction quality is guaranteed, and the construction efficiency is improved.
Drawings
FIG. 1 is a schematic construction diagram of an external waterproof layer of an underground structural project in an embodiment of the invention;
wherein 11 is a concrete cushion; 12 is a bottom plate fine stone concrete protective layer; 13 is a waterproof roll of the bottom plate; 21 is a sidewall base layer; 22 is a polymer cement mortar; 23 is a side wall waterproof roll; 24 is a waterproof mortar protective layer; 25 is a brick protective layer; 31 is a top substrate; 32 is cold bottom oil; 33 is a roof waterproofing membrane; 34 is a root-resistant layer; and 35 is a top plate fine stone concrete protective layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention discloses a construction method of an external waterproof layer of an underground structural engineering, which can be applied to external waterproof construction of underground structural engineering such as an underground comprehensive pipe gallery, an underground underpass tunnel, an underground ventilation shaft and the like, and the embodiment takes the underground comprehensive pipe gallery as an example for explanation; specifically, the construction method comprises bottom plate waterproof construction, side wall waterproof construction and top plate waterproof construction, wherein the bottom plate waterproof construction and the top plate waterproof construction are constructed by adopting a dry paving method, and the side wall waterproof construction is constructed by adopting a wet paving method; wherein, the wet-laying method has the advantages that: the requirement on the base surface is low, the construction freedom degree is high, the influence of weather change is avoided, the construction can be carried out on a wet base surface, the construction period can be greatly shortened, the cost is saved, and the effect that the coiled material and the base surface are fully adhered can be achieved; the dry spreading method has the advantages that: the construction is simple, and the construction efficiency is high.
Specifically, in an embodiment of the present invention, the waterproof construction of the bottom plate includes the following steps:
step S11, a concrete cushion construction process is performed to form the concrete cushion 11 on the bottom plate.
Specifically, the concrete cushion layer is a C20 concrete cushion layer, and the step S11 specifically includes: after the sidelines of the concrete cushion are measured and released, a template of the concrete cushion is arranged on the bottom plate, and the height of the template of the concrete cushion is the height of a concrete pouring surface; the template of the concrete cushion layer is made of wood purlin, the straight line segment template is fixed once every 1m, and the curve change segment template is fixed once every 0.5m, so that the template running phenomenon in the cushion layer concrete pouring process is prevented; then concrete is poured in the template of the concrete cushion layer, and the concrete is vibrated while pouring to form the concrete cushion layer 11, the vibration is carried out by adopting a 50-type vibrating rod, the moving range is 1.5 times of the action radius, and the compactness of the concrete is ensured.
And S12, after a layer of base layer treating agent is coated on the concrete cushion layer 11, paving the bottom plate waterproof roll 13 on the concrete cushion layer 11.
Specifically, the bottom plate waterproof roll 13 is a double-sided self-adhesive polymer modified asphalt waterproof layer with the thickness of 4mm, and is paved in a single layer by a point-bonding method. After the concrete cushion 11 reaches the designed strength, cleaning the concrete cushion 11 and ensuring the concrete cushion to be dry, then brushing a layer of base layer treating agent, and then paving and pasting the bottom plate waterproof coiled material 13; before the bottom plate waterproof coiled material 13 is laid, a laying line of the bottom plate waterproof coiled material 13 is popped up on the concrete cushion layer 11, the bottom plate waterproof coiled material is laid on a reference surface in a mode of aligning with a reference line, then the isolation paper is lifted from the back surface from one end, two persons pull the lifted isolation paper uniformly and pull the lifted isolation paper backwards with force, the whole pair of isolation paper is pulled out slowly, and meanwhile, part of the bottom plate waterproof coiled material 13 lifted by the isolation paper is adhered to the concrete cushion layer 11. The waterproof coiled material 13 of the bottom plate is rolled forwards and backwards by the rubber roller at any time after being paved and adhered, so that the waterproof coiled material is firmly adhered to the base surface. Wherein the overlapping width of the short edges of the adjacent bottom plate waterproof coiled materials 13 is not less than 80mm (namely more than or equal to 80mm), the short edges are overlapped by adopting a glue joint tape, and the overlapping of the end parts of the adjacent bottom plate waterproof coiled materials 13 is staggered; the lapping width of the long side is not less than 80mm (namely is more than or equal to 80mm), and the adhesive tape is adopted for lapping. When the adjacent bottom plate waterproof coiled materials 13 are lapped, the lower layer coiled material oil paper is untied, the upper layer coiled material is paved and attached on the upper layer coiled material, and the weak part which is paved and attached relatively is blocked by sealing paste. And the first reinforcing layer is made in advance at the positive and negative corners of the bottom plate waterproof coiled material 13, the width of the first reinforcing layer is 300 plus 500mm, and the first reinforcing layer is made into an arc or a slope angle of 45 degrees.
And S13, forming a bottom plate fine aggregate concrete protective layer 12 on the bottom plate waterproof roll 13.
Specifically, the workability of the concrete is detected when the fine aggregate concrete enters the field, and construction can be performed after the concrete meets the requirements. Before the fine stone concrete protective layer 12 is poured, a template with the height of 5cm is arranged on the bottom plate, the template is made of wood purlin, the template fixing of the linear section is arranged once every 1m, and the template of the curved section is reinforced once every 0.5 m. When pouring, the concrete is uniformly spread on the waterproof coiled material 13 of the bottom plate, and then a wooden trowel is used for uniformly smearing so as to ensure the thickness of the fine stone concrete protective layer.
The side wall waterproof construction comprises the following steps:
and step S21, cleaning the side wall base layer 21 and determining a coil paving datum line of the side wall.
Specifically, the surface flatness of the side wall base layer 21 is checked, and surface cleaning is performed; and then determining a coil paving datum line of the side wall.
And step S22, coating polymer cement mortar 22 on the side wall base layer 21 according to the coil paving reference line of the side wall, and paving the side wall waterproof coil 23 on the polymer cement mortar 22.
Specifically, the polymer cement mortar 22 is prepared by using 32.5R ordinary silica cement, and the steps for preparing the polymer cement mortar 22 specifically include: according to the following steps of 1: 10, mixing the polymer master batch and cement in a mass ratio of 0.4, and uniformly stirring the mixture and water to obtain a slurry mixed solution; and stirring the slurry mixed solution by using an electric stirrer, uniformly stirring, and standing for 5-8 min, wherein the stirring time is 1-2 min.
The step S22 specifically includes: according to the coil paving datum line of the side wall, the polymer cement mortar 22 is coated on the side wall base layer 21, the paving thickness of the polymer cement mortar 22 is determined to be 3mm, and the fact that the range of the cement mortar is not too large in the coil paving range and the cement mortar is not needed to be smeared while being smeared is noticed. The side wall waterproof roll 23 is a 4 mm-thick double-sided self-adhesive polymer modified asphalt waterproof layer, an isolation film on the lower surface of the side wall waterproof roll 23 is removed, and the side wall waterproof roll 23 is flatly laid on the polymer cement mortar 22 which is just laid and coated; after the first coiled material is paved, the polymer cement mortar 22 is coated, the second coiled material is paved, and the rest is done; beating and pressing the upper surface of the coiled material by using a trowel or a rubber plate, lifting the slurry, and discharging air on the lower surface of the coiled material to enable the coiled material to be tightly attached to the slurry; when in lapping, the transparent isolating film at the lapping part of the coiled material at the lower layer is uncovered, the coiled material at the upper layer is flatly pasted on the coiled material at the lower layer, and the lapping width of the coiled material is not less than 80 mm; after the coiled material is laid, the parts of the coiled material such as the coiled material head, the pipeline wrapping and the like are sealed by using sealing paste. The side wall waterproof coiled material 23 is provided with a second reinforcing layer with the width of 300-plus-500 mm at the chamfer position of the side wall and the top plate, and the second reinforcing layer and the chamfer position are made into an arc or a chamfer angle of 45 degrees.
And step S23, smearing waterproof mortar with the thickness of 20mm and the ratio of 1:3 on the side wall waterproof coiled material 23 to form a waterproof mortar protective layer 24.
Specifically, the waterproof mortar protective layer 24 adopts cement mortar with the label of M7.5, the mortar adopts commercial mortar, the commercial mortar is transported to a construction site, and the mortar can be used after workability detection and meeting requirements. Coating a waterproof mortar protective layer 24 on the side wall waterproof coiled material 23 from the bottom to the top, wherein the coating height is less than or equal to 1.2m every day; and after the mortar reaches a certain strength, the mortar is carried out to prevent the mortar from falling off due to insufficient strength.
Step S24, building bricks on the outer side of the waterproof mortar protective layer 24 to form a brick-built protective layer 25 with the thickness of 120 mm;
specifically, the masonry brick adopts cement with the solid strength grade of MU5 and the size of 240 multiplied by 115 multiplied by 90. The bricks are built from two ends of the side wall to the middle of the outer side of the waterproof mortar protective layer 24 to form a brick protective layer 25, and the building height is less than or equal to 1m every day, so that the building of the masonry with a certain strength is prevented from collapsing.
The roof waterproof construction comprises the following steps:
step S31, cleaning the top board base layer 31, brushing a layer of cold primer oil 32 on the top board base layer 31, and popping up the coil of the bottom board on the top board base layer 31 to lay a reference line.
Specifically, when the top plate concrete reaches the design strength after being poured, dust and sundries on the top surface base surface are cleaned, a layer of cold bottom oil 32 is coated, the cold bottom oil is uniformly coated, the coating is not omitted for transition coating, and before the coiled material is spread and pasted, a coiled material laying datum line of the bottom plate is popped up on the top plate base layer 31.
In step S32, the roof waterproof roll 33 is laid on the roof base layer 31 according to the roof roll laying reference line.
Specifically, the roof waterproof roll 33 is a double-sided self-adhesive polymer-modified asphalt waterproof layer with a thickness of 4mm, in step S32, the roll aligned with the roof is laid on the reference surface, the release paper of the roof waterproof roll 33 is lifted from the back surface from one end, two persons pull the lifted release paper uniformly and pull the lifted release paper backward with force, the whole pair of release paper is slowly pulled out, and simultaneously, part of the roof waterproof roll 33 lifted by the release paper is adhered to the roof base layer 31. After the coiled material is spread and pasted, the coiled material is rolled forwards and backwards by using a rubber roller at any time, so that the coiled material is firmly adhered to the base surface. The lapping width of the coiled material is not less than 80mm, the lower coiled material oiled paper is untied at the lapping part, and the upper coiled material is paved and attached on the lower coiled material oiled paper; and sealing the weak place with sealant.
In step S33, the root penetration resistant layer 34 is applied to the roof waterproof roll 33.
Specifically, before paving and pasting, the oil paper on the top surface of the top plate waterproof roll 33 is removed, then the root-resistant layer 34 is paved and pasted on the top plate waterproof roll 33, and the paving and pasting method of the root-resistant layer 34 is the same as that of the top plate waterproof roll 33; the overlapping parts of the adjacent root penetration resistant layers 34 are connected by hot melting welding.
In step S34, the top plate fine aggregate concrete protective layer 35 is formed on the root penetration resistant layer 34.
Specifically, after the backfilling of the two sides of the pipe gallery is completed, the top plate fine stone concrete protective layer 35 with the thickness of 70mm is poured. Before concrete pouring, templates with the height of 7cm are arranged on the periphery of the top plate, the templates are made of wood purlin, the templates in the linear sections are fixed at positions of every 1m, and the curved sections are reinforced once every 0.5 m. When pouring, the concrete is uniformly spread on the coiled material, and then a wooden trowel is used for uniformly smearing, so that the thickness of the top plate fine stone concrete protective layer 35 is ensured.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The construction method of the external waterproof layer of the underground structural engineering is characterized by comprising the following steps of bottom plate waterproof construction, side wall waterproof construction and top plate waterproof construction:
the waterproof construction of the bottom plate comprises the following steps:
step S11, performing a construction process of the concrete cushion layer to form the concrete cushion layer on the bottom plate;
step S12, after a layer of base layer treating agent is coated on the concrete cushion layer, a bottom plate waterproof coiled material is paved on the concrete cushion layer;
step S13, forming a bottom plate fine aggregate concrete protective layer on the bottom plate waterproof roll;
the side wall waterproof construction comprises the following steps:
step S21, cleaning the side wall base layer and determining a coil paving datum line of the side wall;
step S22, according to the coil paving datum line of the side wall, coating polymer cement mortar on the side wall base layer, and paving a side wall waterproof coil on the polymer cement mortar;
step S23, forming a waterproof mortar protective layer on the side wall waterproof roll;
step S24, building bricks on the outer side of the waterproof mortar protective layer to form a brick protective layer;
the roof waterproof construction comprises the following steps:
step S31, cleaning the top plate base layer, coating a layer of cold bottom oil on the top plate base layer, and popping up a coiled material of the top plate on the top plate base layer to lay a reference line;
step S32, paving a top plate waterproof roll on the top plate base layer according to the roll paving datum line of the top plate;
step S33, paving a root-resistant layer on the waterproof roll of the top plate;
and step S34, forming a top plate fine aggregate concrete protective layer on the root penetration resistant layer.
2. The method for constructing an external waterproof layer of an underground structural engineering according to claim 1, wherein the step S11 specifically comprises:
after the sidelines of the concrete cushion are measured and released, a template of the concrete cushion is arranged on the bottom plate, and the height of the template of the concrete cushion is the height of a concrete pouring surface; wherein, the template of the concrete cushion layer adopts wood purlin, and the straight-line segment template is fixed once every 1m, and the curve change segment template is fixed once every 0.5 m;
and pouring concrete in the template of the concrete cushion layer, and vibrating while pouring to form the concrete cushion layer.
3. The construction method of an external waterproof layer of an underground structural engineering according to claim 1, wherein the waterproof roll of the floor is a double-sided self-adhesive polymer-modified asphalt waterproof layer;
in step S12, the step of laying the waterproof bottom sheet roll on the concrete cushion includes:
the method comprises the following steps that (1) isolation paper of a bottom plate waterproof coiled material is lifted from the back side from one end, two persons pull the lifted isolation paper uniformly and forcefully to pull out the whole pair of isolation paper, meanwhile, part of the bottom plate waterproof coiled material with the lifted isolation paper is pasted on a concrete cushion layer, and the bottom plate waterproof coiled material is rolled by adopting a rubber roller before and after the bottom plate waterproof coiled material is pasted;
the lapping width of the adjacent bottom plate waterproof coiled materials is larger than or equal to 80mm, the adjacent bottom plate waterproof coiled materials are lapped by a glue joint belt, a first reinforcing layer is arranged at the position of a male corner and a female corner of the bottom plate and the side wall, and the width of the first reinforcing layer is 300-500 mm.
4. The method for constructing an external waterproof layer of an underground structural engineering of claim 1, wherein in the step S22,
the step of preparing the polymer cement mortar comprises:
according to the following steps of 1: 10, mixing the polymer master batch and cement in a mass ratio of 0.4, and uniformly stirring the mixture and water to obtain a slurry mixed solution;
and stirring the slurry mixed solution by using an electric stirrer, uniformly stirring, and standing for 5-8 min, wherein the stirring time is 1-2 min.
5. The construction method of an external waterproof layer of an underground structural engineering according to claim 1, wherein the side wall waterproof roll is a double-sided self-adhesive polymer modified asphalt waterproof layer;
in the step S22, removing the isolation film on the lower surface of the side wall waterproof roll, spreading the side wall waterproof roll on the painted polymer cement mortar, painting the next polymer cement mortar after one roll is completely paved, paving the next side wall waterproof roll, and after paving, using a trowel or a rubber plate to flap and press the upper surface of the side wall waterproof roll so as to enable the side wall waterproof roll to be tightly adhered to the mortar;
the lap joint width of the adjacent side wall waterproof coiled materials is larger than or equal to 80mm, a second reinforcing layer is arranged at the position of a chamfer angle formed by the side wall and the top plate in a joint mode, and the width of the second reinforcing layer is 300-500 mm.
6. The method for constructing an external waterproof layer of an underground structural engineering according to claim 1, wherein in the step S23, a waterproof mortar protective layer is applied to the waterproof roll of the side wall from the bottom to the top, and the applied height per day is 1.2m or less.
7. The method for constructing an external waterproof layer of an underground structural engineering according to claim 1, wherein in the step S24, bricks are laid from both ends of the side wall toward the middle of the outside of the waterproof mortar protecting layer to form a brick protecting layer, and the daily laying height is 1m or less.
8. The construction method of an external waterproof layer of underground structural engineering according to claim 1, wherein the roof waterproof sheet is a double-sided self-adhesive polymer-modified asphalt waterproof layer;
in step S32, the top sheet is aligned with the reference line, the separation paper of the top sheet waterproof roll is lifted from the back side from one end, two persons pull the lifted separation paper and pull it backward to pull out the whole separation paper, and part of the top sheet waterproof roll is adhered to the top sheet base layer, and the bottom sheet waterproof roll is rolled by the rubber roller before and after the top sheet waterproof roll is laid
Wherein, the overlapping width of the waterproof coiled materials of the adjacent top plates is more than or equal to 80 mm.
9. The method for constructing an external waterproof layer of an underground structural engineering according to claim 1, wherein the adjacent root penetration resistant layers are connected by thermal welding in the step S33.
10. The method of constructing an external waterproof layer of an underground structural engineering according to claim 1, wherein the underground structural engineering is an underground utility tunnel, an underground underpass tunnel or an underground ventilation shaft.
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