CN115199041A - Construction method for inserting basement roof in advance - Google Patents
Construction method for inserting basement roof in advance Download PDFInfo
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- CN115199041A CN115199041A CN202210934181.XA CN202210934181A CN115199041A CN 115199041 A CN115199041 A CN 115199041A CN 202210934181 A CN202210934181 A CN 202210934181A CN 115199041 A CN115199041 A CN 115199041A
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- 238000010276 construction Methods 0.000 title claims abstract description 58
- 239000004567 concrete Substances 0.000 claims abstract description 86
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 239000011376 self-consolidating concrete Substances 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims abstract description 5
- 239000011178 precast concrete Substances 0.000 claims description 22
- 239000011449 brick Substances 0.000 claims description 13
- 239000011083 cement mortar Substances 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 12
- 239000011440 grout Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000011455 calcium-silicate brick Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011241 protective layer Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000003020 moisturizing effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 23
- 238000005266 casting Methods 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to a basement roof advanced insertion construction method, which belongs to the technical field of building construction and comprises the following steps of determining a reserved pouring opening spacing distance and a self-compacting concrete mix proportion according to a field grouting pouring experiment, pouring a prefabricated concrete plate, installing a post-cast strip template, treating construction joints and clearing concrete residues, finishing post-cast strip steel bar binding, sealing a post-cast strip by adopting the prefabricated concrete plate and well performing waterproof construction, performing high-pressure grouting after the grouting condition of the post-cast strip is achieved, performing concrete moisturizing maintenance on the post-cast strip, and removing the post-cast strip template to finish construction after the concrete strength meets the requirement. According to the invention, the cast-in-place prefabricated concrete slabs are adopted to be sealed in advance, and the pouring openings are reserved on the post-pouring strip templates for grouting and pouring, so that the condition that an owner template house and a garden display area are open is met, the construction of a waterproof protective layer and backfilling is carried out in advance, and the effects of saving energy and land, shortening the whole progress of the project and increasing the economic benefit are achieved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method for inserting a top plate of a basement in advance.
Background
The post-settlement casting belt can be cast for more than 60 days after the main building structure is closed or longer according to design requirements, and the construction time of top plate backfill of the top plate earthing garage is also limited by the casting time of the post-settlement casting belt, so that the construction site is narrow, the transportation site is difficult to arrange, and the site expense and the construction period loss are increased; generally, the basement has a large area, a plurality of post-cast strips need to be arranged vertically and horizontally for control such as settlement, the post-cast strips are constructed for the second time, construction joints exist between the post-cast strips and surrounding top plates, leakage is easy to cause due to carelessness, grouting treatment is needed, maintenance is difficult, cost is high, and the influence on construction period and quality is large.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a construction method for inserting a basement roof in advance, which is characterized in that a cast-in-place prefabricated concrete plate is adopted to be closed in advance, a pouring opening is reserved in a post-pouring strip template for grouting and pouring, the opening of an owner template house and a garden display area is met, the construction of a waterproof and waterproof protective layer and backfilling is carried out in advance, and the effects of saving energy and land, shortening the integral progress of a project and increasing the economic benefit are achieved.
The purpose of the invention can be realized by the following technical scheme:
a construction method for inserting a top plate of a basement in advance comprises the following steps:
firstly, performing a grouting pouring experiment on site, determining the spacing distance of the preformed holes and the mixing proportion of self-compacting concrete, and optimizing a construction scheme;
step two, casting the prefabricated concrete plate in situ: the prefabricated concrete slab pouring reinforcing bars are double-layer and bidirectional, round steel lifting rings are embedded in the prefabricated concrete slab pouring reinforcing bars, and round corners are formed on two sides parallel to the post-pouring belt;
step three, post-pouring strip template installation and construction joint treatment: the supporting system of the post-cast strip is independently built, the template of the post-cast strip is tightly attached to the top plate, a plurality of vertical rods are arranged below the top plate, wood beams are arranged between the top plate and the vertical rods, the vertical rods are connected into a whole through a plurality of horizontal rods, and the position of a construction joint is roughened;
step four, binding post-cast steel bars: finishing the steel bars, straightening, regulating and fully fastening and binding;
step five, closing the prefabricated concrete plate of the post-cast strip and reserving a pouring opening on the template of the post-cast strip: before laying the precast concrete slabs, transversely building a layer of lime-sand bricks along the edges of the two sides of the post-cast strip by using cement mortar, ensuring the upper surfaces of the lime-sand bricks to be flat and straight, and laying the precast concrete slabs after the building of the lime-sand bricks is completed for 48 hours;
the pouring openings are preferentially arranged on a floor slab on the negative layer of the basement, and the distance between the pouring openings at the bottom of the post-cast strip formwork can be determined according to the thickness of concrete slabs, reinforcements in the concrete slabs, self-compacting concrete and the actual pressure characteristics of a grouting machine;
step six, base layer treatment: after the prefabricated concrete plate is installed, checking the internal corners at the root part of the prefabricated concrete plate, the external corners at the top part of the prefabricated concrete plate, the internal corners of the sand lime brick and the like, and performing fillet plastering treatment by using waterproof cement mortar;
step seven, waterproof layer construction: when the base layer is processed and dried to reach waterproof construction conditions, adhering mortar bricks at the root parts of the prefabricated concrete slabs, arranging foamed polyethylene rods, carrying out waterproof construction on joints such as male and female corner lap joints, stubble throwing, additional layers and the like, sealing by adopting waterproof coiled materials, and adding the additional layers at the tops of the prefabricated concrete slabs after sealing is finished;
step eight, pouring concrete in the post-pouring belt by grouting: the method comprises the following steps that a pouring opening and an exhaust opening are formed in a post-pouring belt template, pipelines of grouting equipment and secondary pressurization equipment are connected with the pouring opening and the exhaust opening respectively, the length of a grouting pipe is measured actually, a pressure gauge and a grouting pump are debugged, grout is poured into the pouring opening under the condition that the structure pressure range is not exceeded, and after grouting of the grouting equipment is finished, secondary pressurization is carried out on the inner portion of grouting through a high-pressure grouting machine after the grout is initially set;
step nine, concrete curing and pouring opening sealing: temporarily sealing and curing a pouring opening by adopting plastic cloth or a film within 12 hours after the concrete pouring is finished, and spraying water into gaps of a post-pouring strip template, wherein the concrete is maintained for at least 14 days;
step ten, dismantling the post-cast strip template: and (3) dismantling the post-cast strip template when the concrete strength of the post-cast strip reaches 100% of that of the original structure, wherein the concrete dismantling time is determined according to the test result of the test block under the same condition of the post-cast strip.
And further, in the third step, concrete residues are removed from the base layer before the post-cast strip template is installed, and cement mortar is coated as an interface treating agent and washed clean.
Furthermore, in the fifth step, before the precast concrete slabs are laid, setting out lines according to a laying drawing to mark the edge line of each precast slab, paving a layer of cement mortar on the originally laid sand-lime bricks during laying, squeezing the precast concrete slabs tightly, and keeping the edges of the precast concrete slabs on the same post-pouring belt on the same straight line.
Further, in the fifth step, after the prefabricated concrete plate is paved for 48 hours, the levelness, the verticality and the like of the prefabricated concrete plate are corrected, the joint filling treatment is carried out on the joint by using waterproof mortar, and the gap between the prefabricated concrete plate and the top plate is sealed by adopting a foamed polyethylene rod.
And further, in the seventh step, after the waterproof layer is constructed, artificial backfill is carried out between the prefabricated concrete plates and within 2 meters on two sides of the prefabricated concrete plates, and the prefabricated concrete plates cannot be disturbed.
Further, in the eighth step, when grout is poured, pouring is performed gradually from one side of the post-pouring strip to the other side of the post-pouring strip according to the setting sequence of the positions of the pouring openings, when grouting is performed on each pouring opening, a mode of multiple supplementary grouting is adopted, grouting is stopped until the pressure change of grouting is relatively smooth and stable, a valve on a grouting pipe is closed, and adjacent pouring openings are re-poured.
The beneficial effects of the invention are as follows:
(1) The post-cast strip after sedimentation is sealed in advance by adopting a cast-in-place prefabricated concrete plate, and concrete is poured by grouting in a preformed hole of a template at the bottom of the post-cast strip, so that the requirements of opening an owner template house and a garden display area are met, and the requirements of construction of a waterproof protective layer and backfilling are met in advance.
(2) The post-pouring belt after settlement is sealed at the top of a main building structure, self-compacting concrete is adopted for post-pouring after settlement difference between the underground garage and the main building is eliminated, vibration is not needed, closed maintenance is conducted, and the quality of the concrete is guaranteed.
(3) The on-site space utilization problem caused by the post-pouring belt pouring and roof earthing backfill time is solved, and the effects of saving energy and land, shortening the whole progress of the project and increasing the economic benefit are achieved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a construction structure view of a post-settlement casting strip according to the present invention;
figure 2 is a side sectional view of the precast concrete slab of the present invention;
FIG. 3 is a schematic view of the top plate form of the present invention;
description of the main element symbols:
in the figure: 1. prefabricating a concrete slab; 2. lime-sand bricks; 3. an additional layer; 4. a top plate; 5. post-pouring a strip template; 6. pouring a mouth; 7. wood purlin; 8. erecting a rod; 9. a horizontal bar; 10. waterproof coiled materials; 11. a hoisting ring; 12. and (4) rounding the corners.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, characteristics and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1-3, a construction method for inserting a top plate of a basement in advance includes the following steps:
firstly, performing a grouting pouring experiment on site, determining the spacing distance of the preformed holes and the mixing proportion of self-compacting concrete, and optimizing a construction scheme;
step two, casting the prefabricated concrete plate 1 in situ: the precast concrete slab 1 is poured and reinforced with steel bars in a double-layer bidirectional A10@150 mode, the concrete grade is C30, a steel bar protective layer is 15mm, the structural size is 1100mm x 900mm x 200mm, an A8 round steel hanging ring 11 is embedded in advance, and two sides parallel to a post-pouring belt are provided with R =50mm round corners 12;
step three, installing a post-cast strip template 5 and treating a construction joint: a supporting system of the post-cast strip is independently built, a template 5 of the post-cast strip is tightly attached to a top plate 4, a plurality of vertical rods 8 are arranged below the top plate 4, the distance between the vertical rods 8 is 900mm, the step pitch is 1200mm, wood beams 7 are arranged between the top plate 4 and the vertical rods 8, the vertical rods 8 are connected into a whole through a plurality of horizontal rods 9, and the construction joint is roughened;
step four, binding post-cast steel bars: finishing the steel bars, straightening, regulating and fully fastening and binding;
step five, closing the post-cast strip precast concrete plate 1 and reserving a pouring opening 6 on a post-cast strip template 5: before laying the precast concrete plate 1, transversely laying a layer of lime-sand bricks 2 by cement mortar along the edges of two sides of the post-cast strip by 2-3cm, ensuring the upper surfaces of the lime-sand bricks 2 to be flat and straight, and laying the precast concrete plate 1 after the lime-sand bricks 2 are laid for 48 hours;
the pouring openings 6 are preferentially arranged on a floor slab on the negative layer of the basement, the horizontal flowing distance of self-sealing concrete from a discharging point is not more than 10m, in order to ensure the plate thickness and the concrete compactness of the post-cast strip, the distance between the pouring openings 6 at the bottom of the post-cast strip template 5 is not more than 2400mm, and the distance between the pouring openings 6 can be determined according to the plate thickness of the concrete, the arrangement of reinforcements in the concrete plate, the self-sealing concrete and the pressure actual characteristics of a grouting machine;
step six, base layer treatment: after the prefabricated concrete plate 1 is installed, checking the positions of the internal corner at the root of the prefabricated concrete plate 1, the external corner at the top of the prefabricated concrete plate 1, the internal corner of the sand lime brick 2 and the like, and performing treatment of smearing a fillet D by using waterproof cement mortar to be more than or equal to 50 mm;
step seven, waterproof layer construction: when the base layer is processed and dried to reach the waterproof construction condition, setting 50 foamed polyethylene rods on the lime sand bricks 2 adhered to the roots of the prefabricated concrete slabs 1, carrying out waterproof construction on nodes such as the internal and external corner lap joint, stubble throwing, an additional layer 3 and the like, sealing by adopting a waterproof coiled material 10, and adding the additional layer 3 on the top of the prefabricated concrete slabs 1 after sealing;
step eight, pouring the post-cast strip concrete by grouting: a pouring opening 6 and an exhaust opening are formed in the post-pouring belt template 5, pipelines of grouting equipment and secondary pressurization equipment are respectively connected with the pouring opening 6 and the exhaust opening, the length of a grouting pipe is actually measured, a pressure gauge and a grouting pump are debugged, grout is poured into the pouring opening 6 under the condition that the structure compression range is not exceeded, and after grouting of the grouting equipment is finished, secondary pressurization is carried out on the interior of grouting through a high-pressure grouting machine after the grout is initially set;
step nine, concrete curing and pouring opening 6 is closed: temporarily sealing and maintaining the pouring opening 6 by adopting plastic cloth or a film within 12 hours after the concrete pouring is finished, and spraying water into the gap of the post-pouring strip template 5 at the same time, wherein the concrete is maintained for at least 14 days in a moisture-preserving manner;
step ten, dismantling the post-cast strip template 5: and the post-cast strip template 5 can be dismantled when the concrete strength of the post-cast strip reaches 100% of that of the original structure, and the concrete dismantling time is determined according to the test result of the test block under the same condition of the post-cast strip.
And further, in the third step, concrete residues are removed from the base layer before the post-cast strip template 5 is installed, and cement mortar is coated as an interface treating agent and washed clean.
Furthermore, in the fifth step, before the precast concrete slabs 1 are laid, the lines are laid according to the laying drawing to mark the edge lines of each precast slab, a layer of cement mortar is laid on the originally laid sand lime bricks 2, the precast concrete slabs 1 are tightly squeezed, and the edges of the precast concrete slabs 1 on the same post-cast strip are on the same straight line.
Further, in the fifth step, after the prefabricated concrete plate 1 is paved for 48 hours, the levelness, the verticality and the like of the prefabricated concrete plate 1 are corrected, the joint filling treatment is carried out on the joint by using waterproof mortar, and the gap between the prefabricated concrete plate 1 and the top plate 4 is sealed by adopting a foamed polyethylene rod.
And further, in the seventh step, after the waterproof layer is constructed, backfilling the backfilled soil between the prefabricated concrete plates 1 and within 2 meters of two sides of the prefabricated concrete plates 1 manually, wherein the disturbance cannot be caused to the prefabricated concrete plates 1, and the compaction coefficient of the backfilled soil is more than or equal to 0.94.
Further, in the eighth step, when grout is poured, pouring is gradually carried out from one side of the post-pouring zone to the other side of the post-pouring zone according to the arrangement sequence of the positions of the pouring openings 6, when each pouring opening 6 is grouted, the pouring pressure is 0.5-1.6mpa, the grouting is stopped by adopting a mode of multiple supplementary grouting until the grouting pressure changes smoothly and stably, a valve on a grouting pipe is closed, and the adjacent pouring openings 6 are grouted again.
According to the invention, the grout is subjected to secondary pressurization inside the grouting after initial setting, so that a certain pressure can be always applied to the grouting material in a period from the beginning of grouting to the initial setting of the grout, and the compactness of the grouting material and the compactness of horizontal joints of upper and lower structures are ensured.
According to the invention, the post-cast strip can be timely used for waterproofing and finishing the protective layer after being sealed in advance, so that sundries can be prevented from falling in and rainwater can be prevented from flowing in, a good condition is created for basement construction, reinforcing steel bars can be prevented from being corroded to weaken the structural strength, a good site space and a good transportation condition are provided for construction, the site material stacking is effectively ensured under the conditions of short construction period, large reinforcing steel bar amount, large templates and more turnover materials waiting for entering the site, the smooth insertion of decoration in advance is ensured, the construction progress is accelerated overall, and the operation cost is reduced.
The working principle and the using process of the invention are as follows:
a technician determines the spacing distance of reserved pouring ports 6 and the mix proportion of self-compacting concrete according to a field grouting pouring experiment, pours a prefabricated concrete plate 1, installs a post-pouring strip template 5, processes construction joints and cleans concrete residues, finishes post-pouring strip steel bar binding, closes a post-pouring strip by adopting the prefabricated concrete plate 1 and performs waterproof construction, performs high-pressure grouting after the grouting condition of the post-pouring strip is met, performs concrete moisturizing and curing on the post-pouring strip, and can dismantle the post-pouring strip template 5 after the strength of the concrete meets the requirement.
The invention relates to an assembly type temporary pipeline comprehensive arrangement structure, which combines a temporary assembly type drainage ditch and a temporary pipeline in a construction site, is constructed in an assembly type mode, is convenient and fast to operate, not only ensures construction drainage in the construction site, but also has better protection effect on the temporary pipeline, greatly reduces the breakage rate of the temporary pipeline, improves the turnover rate of the temporary pipeline, can recycle and reuse the prefabricated concrete drainage ditch components in the later period, saves materials, time and labor, saves construction cost and is environment-friendly.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (6)
1. A construction method for inserting a basement roof in advance is characterized in that: the method comprises the following steps:
firstly, performing a grouting pouring experiment on site, determining the spacing distance of reserved pouring openings (6) and the mixing proportion of self-compacting concrete, and optimizing a construction scheme;
step two, cast-in-situ precast concrete slab (1): the precast concrete plate (1) is poured with reinforcing bars in double-layer bidirectional mode, round steel hanging rings (11) are embedded in the precast concrete plate, and round corners (12) are formed on two sides parallel to the post-pouring belt;
step three, mounting the post-cast strip template (5) and treating a construction joint: the supporting system of the post-cast strip is independently built, a template (5) of the post-cast strip is tightly attached to a top plate (4), a plurality of vertical rods (8) are arranged below the top plate (4), wood purlins (7) are arranged between the top plate (4) and the vertical rods (8), the vertical rods (8) are connected into a whole through a plurality of horizontal rods (9), and the construction joint is roughened;
step four, binding post-cast steel bars: finishing the steel bars, straightening, regulating and fully fastening and binding;
step five, sealing the post-cast strip precast concrete plate (1) and reserving a pouring opening (6) on the post-cast strip template (5): before laying the precast concrete plate (1), transversely laying a layer of lime-sand bricks (2) along the edges of the two sides of the post-cast strip by cement mortar, ensuring the upper surfaces of the lime-sand bricks (2) to be flat and straight, and laying the precast concrete plate (1) after the lime-sand bricks (2) are laid for 48 hours;
the pouring openings (6) are preferentially arranged on a floor slab on the negative layer of the basement, and the distance between the pouring openings (6) at the bottom of the post-pouring strip template (5) can be determined according to the thickness of concrete slab, the internal arrangement of reinforcement of the concrete slab, self-compacting concrete and the pressure actual characteristics of a grouting machine;
step six, base layer treatment: after the prefabricated concrete plate (1) is installed, checking positions such as the root internal corner of the prefabricated concrete plate (1), the top external corner of the prefabricated concrete plate (1), the internal corner of the sand lime brick (2) and the like, and performing fillet plastering treatment by using waterproof cement mortar;
step seven, waterproof layer construction: when the base layer is processed and dried to reach the waterproof construction condition, setting a foamed polyethylene rod by adhering a lime sand brick (2) to the root of the prefabricated concrete plate (1), carrying out node waterproof construction such as female and male corner lapping, stubble throwing, an additional layer (3) and the like, sealing by adopting a waterproof coiled material (10), and adding the additional layer (3) at the top of the prefabricated concrete plate (1) after sealing is finished;
step eight, pouring the post-cast strip concrete by grouting: a pouring opening (6) and an exhaust opening are formed in the post-pouring belt template (5), pipelines of grouting equipment and secondary pressurization equipment are respectively connected with the pouring opening (6) and the exhaust opening, the length of a grouting pipe is actually measured, a pressure gauge and a grouting pump are debugged, grout is poured into the pouring opening (6) under the condition that the structure compression range is not exceeded, and after grouting of the grouting equipment is finished, secondary pressurization is carried out on the inside of grouting through a high-pressure grouting machine after the grout is initially set;
step nine, concrete curing and pouring opening (6) is closed: temporarily sealing and maintaining the pouring opening (6) by adopting plastic cloth or a film within 12 hours after the concrete pouring is finished, and spraying water into the gap of the post-pouring strip template (5) at the same time, wherein the concrete is maintained for not less than 14 days in a moisture-preserving manner;
step ten, dismantling the post-cast strip template (5): and (3) dismantling the post-cast strip template (5) when the concrete strength of the post-cast strip reaches 100% of that of the original structure, wherein the concrete dismantling time is determined according to the test result of the post-cast strip test block under the same condition.
2. The construction method for inserting the top plate of the basement in advance as claimed in claim 1, wherein the construction method comprises the following steps: in the third step, concrete residues are removed from the base layer before the post-cast strip template (5) is installed, and cement mortar is coated as an interface treating agent and is washed clean.
3. The construction method for inserting the top plate of the basement in advance as claimed in claim 1, wherein the construction method comprises the following steps: and fifthly, before the precast concrete plates (1) are laid, paying off according to a laying drawing to mark the edge line of each precast plate, laying a layer of cement mortar on the originally laid sand lime bricks (2), squeezing the precast concrete plates (1), and keeping the edges of the precast concrete plates (1) on the same post-cast strip on the same straight line.
4. The construction method for inserting the top plate of the basement in advance as claimed in claim 3, wherein the construction method comprises the following steps: and fifthly, after the prefabricated concrete plate (1) is paved for 48 hours, correcting levelness, verticality and the like of the prefabricated concrete plate (1), performing joint filling treatment on the joint by using waterproof mortar, and sealing the gap between the prefabricated concrete plate (1) and the top plate (4) by using a foamed polyethylene rod.
5. The construction method for inserting the top plate of the basement in advance as claimed in claim 1, wherein the construction method comprises the following steps: and seventhly, after the waterproof layer is constructed, manually backfilling the space between the prefabricated concrete plates (1) and within 2 meters of the two sides of the prefabricated concrete plates, wherein the prefabricated concrete plates (1) cannot be disturbed.
6. The construction method for inserting the top plate of the basement in advance as claimed in claim 1, wherein the construction method comprises the following steps: and step eight, gradually pouring the grout from one side of the post-pouring belt to the other side of the post-pouring belt according to the setting sequence of the positions of the pouring openings (6) during pouring, stopping grouting after the pressure change of grouting is relatively smooth and stable by adopting a mode of multiple supplementary grouting when each pouring opening (6) is grouted, closing a valve on a grouting pipe, and re-pouring the adjacent pouring openings (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210934181.XA CN115199041A (en) | 2022-08-04 | 2022-08-04 | Construction method for inserting basement roof in advance |
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| CN202210934181.XA CN115199041A (en) | 2022-08-04 | 2022-08-04 | Construction method for inserting basement roof in advance |
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| CN115199041A true CN115199041A (en) | 2022-10-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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