CN109056844B - Waterproof construction method for outer wall of basement of building - Google Patents
Waterproof construction method for outer wall of basement of building Download PDFInfo
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- CN109056844B CN109056844B CN201811052233.0A CN201811052233A CN109056844B CN 109056844 B CN109056844 B CN 109056844B CN 201811052233 A CN201811052233 A CN 201811052233A CN 109056844 B CN109056844 B CN 109056844B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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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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- 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
- E02D31/04—Watertight packings for use under hydraulic pressure
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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
- E04B1/0007—Base structures; Cellars
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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
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
The invention discloses a waterproof construction method for an outer wall of a basement of a building, which is characterized in that the waterproof construction is realized by adding a PNC803 waterproof material into the outer wall of the basement to pour concrete. The invention has the advantages of simple operation, short construction period, low cost, good waterproof effect and the like.
Description
Technical Field
The invention belongs to the field of construction of building foundation engineering, and particularly relates to a waterproof construction method for an outer wall of a basement of a building.
Background
Land resources are becoming more and more urgent as the economy develops and the population continues to grow. The transition from the educational land to the semi-commercial land for the semi-educational land of the university is promoted, and a large number of comprehensive commercial buildings emerge like bamboo shoots in the spring after rain. However, the commercial building not only needs to meet the requirement of school teaching land, but also needs to meet the benefit requirement of commercial profit, so that the site selection of the commercial building is generally selected at one side close to a city road, thereby greatly increasing the difficulty of construction, and the construction of the engineering foundation pit is more inclined to the excavation without fertilizer grooves.
The construction method for the foundation pit without the fertilizer groove in the building refers to a construction method for the foundation pit, wherein the inner wall of the foundation pit, close to the outer wall of the basement of the building, is not dug into a slope and is in a vertical state, so that the operation space of the outer wall of the basement and the pit wall of the foundation pit is narrow. In general building foundation waterproof construction, a waterproof coiled material is required to be arranged on the outer surface of the basement outer wall, then a protective layer is arranged, and backfilling is carried out after the building foundation construction is finished. However, the adoption of the non-fertilizer groove excavation technology means that the operation space of the retaining wall and the foundation pit wall is narrow, the basement is waterproof, no construction operation surface exists, and the construction difficulty is high. The traditional self-adhesive polymer coiled material waterproof construction needs to be carried out on a modeling wall and adopts single-side formwork construction, so that the existing waterproof technology has the defects of long construction period, high cost, high construction difficulty and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: the building basement exterior wall waterproof construction method is simple in construction, short in construction period, low in cost and good in waterproof effect, and is particularly suitable for being applied to building basement exterior wall construction of high-rise buildings with deep foundation pits.
In order to solve the technical problems, the invention adopts the following technical scheme:
a waterproof construction method for an outer wall of a basement of a building is characterized in that the waterproof construction is realized by adding a PNC803 waterproof material into the outer wall of the basement to pour concrete.
The PNC waterproof material, namely the expansion interior-transfer waterproof material, is an existing waterproof material, but the applicant is applied to the building foundation waterproof construction in the mode for the first time. The construction method has the advantages of convenience and safety in construction, cost saving, short construction period, excellent waterproof effect, reliable quality, strong durability, environmental friendliness and the like.
The PNC803 is a powder material prepared from Portland cement and various chemical substances, is added in the concrete stirring process, and reacts with water and calcium hydroxide in the concrete stirring material to generate water-insoluble crystals, so that the water or other liquid cannot enter from any direction by filling, plugging capillaries and shrinking cracks, and the aim of water prevention is fulfilled. When no water exists, the active ingredients of the PNC803 are in a dormant state, and can be reactivated when being contacted with water again to generate new crystals, so that the concrete can be permanently protected from water and corrosion. Therefore, the waterproof device can ensure that the waterproof effect can be well achieved under different conditions.
The method specifically comprises the following construction steps: (1) roughening treatment; during raft foundation formwork pouring construction, integrally pouring a section of upward-protruding outer wall foundation at the edge of the raft foundation corresponding to the position of the basement outer wall, embedding vertically upward reinforcing steel bars in the outer wall foundation, embedding a water stop steel plate in the middle of the outer wall foundation, exposing half of the water stop steel plate out of the upper surface of the outer wall foundation, performing roughening treatment on the upper surface of the outer wall foundation before final setting of concrete to form a concave-convex surface, and washing the concave-convex surface with water; the connection effect is ensured.
(2) Finishing the reinforcement binding of the basement outer wall by taking the embedded reinforcement in the outer wall foundation as the foundation;
(3) erecting a template; when the template is erected, the basement outer wall, the indoor beam plate and the inner wall are integrally erected, or a convex section of pouring cavity is formed at the position of the basement outer wall corresponding to the indoor beam plate and the inner wall; meanwhile, a blocking net is fixedly arranged at the joint of the basement outer wall, the indoor beam plate and the inner wall; (the block net is used for guaranteeing the communication between the basement outer wall and the indoor beam slab and the inner wall, and simultaneously, the flowing barrier of concrete is increased, thus avoiding the flowing of the concrete between the basement outer wall and the indoor beam slab and the inner wall, leading the position of the indoor beam slab and the inner wall to pour the concrete which is not added with the PNC waterproof material, saving the cost, simultaneously avoiding the concrete flowing and also guaranteeing the waterproof effect of the outer wall body at the joint part)
(4) Pouring concrete, wherein the pouring concrete comprises a concrete configuration step and a pouring step; when pouring is carried out, concrete added with the PNC waterproof material is poured in the inner cavity of the corresponding template of the basement outer wall, and concrete not added with the PNC waterproof material is poured in the inner cavities of the corresponding templates of the indoor beam plate and the inner wall;
(5) and (5) removing the formwork, wherein the concrete strength reaches more than 2.5MPa, and performing formwork removal construction.
Therefore, by adopting the steps, the waterproof material is added into the concrete for pouring, and the obtained concrete building naturally has a good waterproof effect and does not influence the normal construction steps of building construction.
As optimization, PNC waterproof materials are added into concrete for pouring to carry out basement outer wall waterproof construction, when the basement outer wall is poured to a height exceeding the height of a constructor and templates are installed and reinforced, a construction platform is installed on the outer side of the basement outer wall, and an operator stands on the construction platform to install and reinforce the upward templates; the construction platform structure includes that vertical setting and horizontal interval arrange the one row of vertical pole setting between basement outer wall and foundation ditch inner wall, vertical pole setting is improved level and is provided with the multirow along the short horizontal pole that the interval of upper and lower direction was arranged, short horizontal pole one end welded fastening is in the basement outer wall stagnant water bolt outer end of having pour, the other end anchor is on the foundation ditch inner wall, adopt the fastener to fix between short horizontal pole and the vertical pole setting, every row of short horizontal pole upper surface is provided with first long horizontal pole and the long horizontal pole of second along the equal overlap joint of horizontal vertically direction, first long horizontal pole and the long horizontal pole interval of second are arranged and its length direction and basement outer wall length direction are unanimous, first long horizontal pole and the long horizontal pole of second are fixed with adopting the fastener between the short horizontal pole separately, first long horizontal pole and the long horizontal pole surface of second.
Like this, the short horizontal pole is as the support basis of platform, and one end anchor is in the foundation ditch inner wall, and other end welded fastening is in the stagnant water bolt, relies on the simple single vertical pole setting in middle part again to realize supporting, and simple structure has guaranteed the stability of support, simultaneously because vertical pole setting only single row just adopts fastener and short horizontal pole to connect, so can not produce the interference, and the installation is dismantled all very convenient and fast. The two long cross rods and the laid bamboo yoke plates are simple in structure, workers can walk on the bamboo yoke plates conveniently, and safety is improved.
As optimization, a supporting bottom plate is horizontally laid on the ground between the outer wall of the basement and the inner wall of the foundation pit along the length direction of the outer wall of the basement, mounting grooves are formed in the upper surface of the supporting bottom plate along the length direction of the outer wall of the basement at intervals, and the lower ends of the vertical rods are correspondingly inserted into the mounting grooves. Like this, make things convenient for the installation location of vertical pole setting, supporting baseplate has improved construction platform lower extreme load area simultaneously, avoids vertical pole setting lower extreme to be absorbed in earth and influences construction platform stability. As optimization, the short cross rod, the first long cross rod and the second long cross rod are all made of phi 48 multiplied by 3.0 steel pipes, and the steel pipe has the advantages of low cost, convenience in construction, stability and reliability. For optimization, the height distance between two adjacent rows of short transverse rods is 1.5 meters, and the horizontal distance between every two adjacent short transverse rods between every two adjacent rows of short transverse rods is 1.2 meters; the size can ensure the overall structural stability of the construction platform, can not waste too much materials, saves the cost and is very convenient for workers to climb up and down. As optimization, one end of the short cross rod is anchored into the inner wall of the foundation pit by 30 cm; the size can reduce the difficulty of anchoring. The construction is convenient, and the reliability of anchoring and bearing can be ensured.
As optimization, the vertical upright rods are arranged adjacent to the first long cross rod close to the inner wall of the foundation pit. This is because short horizontal pole and foundation ditch inner wall are fixed for the mode of anchor, and the short horizontal pole other end is for welding on the stagnant water bolt, and former steadiness is not like the latter, so set up vertical pole setting in being close to former position, can improve construction platform overall structure's stability and reliability better.
As optimization, in the process of adding PNC waterproof material into concrete for pouring to perform basement exterior wall waterproof construction, when concrete is configured, the concrete is configured by adopting the following waterproof concrete configuration device, the waterproof concrete configuration device comprises a concrete tank truck and a stirring barrel, a plastic water bag is arranged in the stirring barrel, the edge of an upper end opening of the plastic water bag is consistent with and connected with the edge of an upper end opening of the stirring barrel, the length of the plastic water bag after being extended is equal to or higher than the depth of the stirring barrel, an electronic weighing device is arranged at the bottom of the stirring barrel and below the plastic water bag, the electronic weighing device is provided with a weighing surface which is horizontally arranged at the uppermost end and is positioned in the middle of the stirring barrel, one side of the upper end of the stirring barrel is further outwards communicated with a water inlet pipe, the inner end of the water inlet pipe is hermetically connected to the interior of the plastic water bag, a, the inner end of the water outlet pipe is hermetically connected to the inside of the plastic water bag, a water outlet switch valve and a water pump are arranged on the water outlet pipe, and the water outlet end of the water outlet pipe is connected to the inlet of a stirring tank on the concrete tank truck.
Therefore, when the water-saving stirring tank is used, the water outlet switch valve can be closed firstly, the water inlet switch valve is opened, water is fed into the plastic water bag through the water inlet pipe, the water inlet switch valve is closed after the water enters the plastic water bag through the electronic weighing device, then the PNC waterproof materials with the corresponding proportion are added into the plastic water bag, after the water-saving stirring tank is uniformly stirred, the water outlet switch valve and the water pump are opened, the water uniformly mixed with the PNC waterproof materials is directly pumped into the stirring tank, and the concrete formula is added for stirring. Like this, rely on the agitator to realize directly adding in the concrete mixing jar after PNC waterproof material's stirring mixing earlier, guaranteed in the concrete homogeneity that PNC waterproof material sneaked into, and the promptness, make its and waterproof material self time condition that uses match, guaranteed good water-proof effects.
As optimizing, still include automatic stirring device, automatic stirring device includes a tripod, and the tripod includes three foot bars of evenly distributed in circumference, a motor of foot bar inner fixed connection, foot bar length and agitator radius match and the crooked form that the foot bar outer end is used for with agitator edge joint for downwarping, and the motor output is connected with a vertical downwardly extending's (mixing) shaft, and the (mixing) shaft lower extreme extends to the agitator middle and lower part position and is provided with stirring vane at this lower extreme.
Like this, can rely on tripod foot pole joint to fix at the agitator rim for inside stirring vane deepened the agitator, rely on the motor to drive stirring vane and realize the stirring to waterproof material, convenient and fast just improves stirring effect more and does not influence the meter and weigh again.
Preferably, an intermediate plate is further arranged between the electronic weighing device and the plastic water bag, the intermediate plate is horizontally arranged, the shape of the intermediate plate is consistent with the cross section of the inner cavity of the stirring barrel, a gap for the intermediate plate to slide up and down is reserved between the edge of the intermediate plate and the inner cavity of the stirring barrel, the upper surface of the intermediate plate is directly attached to the plastic water bag, and the middle of the lower surface of the intermediate plate is attached to the weighing surface of the electronic weighing device. Therefore, the weight of the plastic water bag can be better transferred to the electronic weighing device by the middle plate, and the weighing accuracy is improved. Furthermore, the lower surface of the middle plate is provided with a layer of elastic rubber material, so that the middle plate can be better attached to the weighing surface of the electronic weighing device, and the electronic weighing device can accurately weigh.
As optimization, the electronic weighing device is provided with a display screen positioned on the side face, and an observation window is arranged on the side face of the stirring barrel opposite to the display screen. In this way, reading is facilitated.
As optimization, the basement outer wall adopts a layered segmented circulating casting and tamping method, the outer wall is sequentially cast in a circulating manner in a segmented and layered mode around the circumference along the periphery, and the layered thickness is not more than 500 mm; each circle of joints is completed before the initial setting of the concrete, and the process of rotating the joints is repeated in cycles until the casting and tamping of the outer wall are completed; the method has the advantages that the pouring quality can be better guaranteed, the pouring efficiency is improved, meanwhile, the sectional layered pouring mode enables the pouring time of each section of concrete to be matched with the service time of the waterproof material, and the waterproof effect after each section of concrete is poured is better guaranteed.
And for optimization, after the basement outer wall is poured, adopting a PNC waterproof material solution painting mode to carry out waterproof construction on the intersection part of the outer side of the raft foundation and the basement outer wall, mixing and stirring the PNC401 material and water uniformly according to the mass ratio of 5:3 to obtain a coating, painting the coating on the intersection part of the outer side of the raft foundation and the basement outer wall, painting twice, and painting for the second time when the first-time coating is not sticky. Therefore, the construction is simple, the leakage of the joint can be better prevented, and the integral waterproof effect of the underground building is ensured. The PNC401 is used for painting the building outer wall, the base surface of the part is required to be clean, moist and free of open water, the painting height extends 300mm above the water stop steel plate, the effective waterproof lap joint length is formed, and the peripheral waterproof quality is ensured.
In conclusion, the invention has the advantages of simple construction, short construction period, low cost and good waterproof effect, and is particularly suitable for being applied to the construction of the basement exterior wall of the high-rise building with deeper foundation pit.
Drawings
Fig. 1 is a side view of a basement exterior wall pouring construction platform structure in a specific embodiment.
Fig. 2 is a top view of the basement exterior wall pouring construction platform structure shown in fig. 1.
Fig. 3 is a schematic structural diagram of a waterproof concrete placement device according to an embodiment.
Fig. 4 is a front view of the single mixing drum of fig. 3.
Fig. 5 is a top view of fig. 4.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
The specific implementation mode is as follows:
a waterproof construction method for the basement exterior wall of a building is characterized in that the method adopts a mode of adding a PNC803 waterproof material into the basement exterior wall to pour concrete so as to realize waterproof construction.
The PNC waterproof material, namely the expansion interior-transfer waterproof material, is an existing waterproof material, but the applicant is applied to the building foundation waterproof construction in the mode for the first time. The construction method has the advantages of convenience and safety in construction, cost saving, short construction period, excellent waterproof effect, reliable quality, strong durability, environmental friendliness and the like.
The PNC803 is a powder material prepared from Portland cement and various chemical substances, is added in the concrete stirring process, and reacts with water and calcium hydroxide in the concrete stirring material to generate water-insoluble crystals, so that the water or other liquid cannot enter from any direction by filling, plugging capillaries and shrinking cracks, and the aim of water prevention is fulfilled. When no water exists, the active ingredients of the PNC803 are in a dormant state, and can be reactivated when being contacted with water again to generate new crystals, so that the concrete can be permanently protected from water and corrosion. Therefore, the waterproof device can ensure that the waterproof effect can be well achieved under different conditions.
The method specifically comprises the following construction steps:
(1) roughening treatment; during raft foundation formwork pouring construction, integrally pouring a section of upward-protruding outer wall foundation at the edge of the raft foundation corresponding to the position of the basement outer wall, embedding vertically upward reinforcing steel bars in the outer wall foundation, embedding a water stop steel plate in the middle of the outer wall foundation, exposing half of the water stop steel plate out of the upper surface of the outer wall foundation, performing roughening treatment on the upper surface of the outer wall foundation before final setting of concrete to form a concave-convex surface, and washing the concave-convex surface with water; the connection effect is ensured.
(2) Finishing the reinforcement binding of the basement outer wall by taking the embedded reinforcement in the outer wall foundation as the foundation;
the basement exterior wall is provided with the types, the number and the intervals of the wall joint bars according to the construction drawing, and the same wall joint bars are arranged; the vertical wall steel bars are connected by straight thread sleeves in the construction process, the overlapping area of the same cross section is not more than 50%, and the space between the wall joint bars of the upper floor slab and the lower floor slab is consistent in position, so that dislocation is prevented;
(3) erecting a template; when the template is erected, the basement outer wall, the indoor beam plate and the inner wall are integrally erected, or a convex section of pouring cavity is formed at the position of the basement outer wall corresponding to the indoor beam plate and the inner wall; meanwhile, a blocking net is fixedly arranged at the joint of the basement outer wall, the indoor beam plate and the inner wall; (the block net is used for guaranteeing the communication between the basement outer wall and the indoor beam slab and the inner wall, and simultaneously, the flowing barrier of concrete is increased, thus avoiding the flowing of the concrete between the basement outer wall and the indoor beam slab and the inner wall, leading the position of the indoor beam slab and the inner wall to pour the concrete which is not added with the PNC waterproof material, saving the cost, simultaneously avoiding the concrete flowing and also guaranteeing the waterproof effect of the outer wall body at the joint part)
In the implementation process, when a formwork is specifically supported, a supporting system between the formwork and the formwork is required to be horizontal and vertical, a supporting point is firm, and the bottom of a side formwork diagonal brace is additionally provided with a skid and has enough pressed area; the bottom surfaces of the wall and the pillar template are required to be leveled, and the lower ends of the wall and the pillar template are close to and flatly padded with a pre-made reference; when the templates are continuously installed on the wall and the column, the templates have reliable supporting points, in order to ensure the section size of the wall and the column, the section size is ensured by the inner size of concrete during template support, and the spacing is about 2 m; the flatness and the verticality of the steel plate are corrected;
(4) pouring concrete, wherein the pouring concrete comprises a concrete configuration step and a pouring step; when pouring is carried out, concrete added with the PNC waterproof material is poured in the inner cavity of the corresponding template of the basement outer wall, and concrete not added with the PNC waterproof material is poured in the inner cavities of the corresponding templates of the indoor beam plate and the inner wall;
the basement outer wall is subjected to layered, segmented and circulating pouring method, the outer wall is sequentially and circularly poured in a layered mode in a segmented and layered mode around the circumference, and the layered thickness is not larger than 500 mm; each circle of joints is completed before the initial setting of the concrete, and the process of rotating the joints is repeated in cycles until the casting and tamping of the outer wall are completed; the method has the advantages that the pouring quality can be better guaranteed, the pouring efficiency is improved, meanwhile, the sectional layered pouring mode enables the pouring time of each section of concrete to be matched with the service time of the waterproof material, and the waterproof effect after each section of concrete is poured is better guaranteed.
(5) Removing the formwork, wherein the concrete strength reaches more than 2.5MPa, and performing formwork removal construction;
concrete is not damaged when the formwork is removed, the front formwork mainly adopts integral movement, the stability and the safety of the formwork are noticed in the moving process, and the construction safety is ensured.
Therefore, by adopting the steps, the waterproof material is added into the concrete for pouring, and the obtained concrete building naturally has a good waterproof effect and does not influence the normal construction steps of building construction.
The concrete pouring construction step of adding the PNC waterproof material into the concrete for pouring to perform raft foundation waterproof construction is the same as the common raft foundation construction, and the concrete pouring construction step of adding the PNC waterproof material into the concrete for pouring to perform deep foundation pit waterproof construction is the same as the common deep foundation pit construction.
In the embodiment, in the process of adding the PNC waterproof material into the concrete for pouring to perform basement outer wall waterproof construction, when the basement outer wall is poured to a height exceeding the height of a constructor and a formwork is installed and reinforced, the construction platform is installed on the outer side of the basement outer wall, and an operator stands on the construction platform to install and reinforce the upward formwork.
The construction platform structure is shown in figures 1-2, and comprises a row of vertical upright rods 13 which are vertically arranged and horizontally arranged between a basement outer wall 11 and a foundation pit inner wall 12 at intervals, wherein multiple rows of short cross rods 14 which are arranged at intervals in the vertical direction are horizontally arranged on the vertical upright rods 13, one ends of the short cross rods 14 are welded and fixed at the outer ends 15 of water stop bolts of the poured basement outer wall, the other ends of the short cross rods are anchored on the foundation pit inner wall 12, the short cross rods 14 and the vertical upright rods 13 are fixed through fasteners, the upper surface of each row of short cross rods 14 is provided with a first long cross rod 16 and a second long cross rod 17 in a lap joint mode in the horizontal and vertical directions, the first long cross rod 16 and the second long cross rod 17 are arranged at intervals, the length direction of the first long cross rod and the second long cross rod are consistent with the length direction of the basement outer wall, the first long cross rod and the second long.
Like this, the short horizontal pole is as the support basis of platform, and one end anchor is in the foundation ditch inner wall, and other end welded fastening is in the stagnant water bolt, relies on the simple single vertical pole setting in middle part again to realize supporting, and simple structure has guaranteed the stability of support, simultaneously because vertical pole setting only single row just adopts fastener and short horizontal pole to connect, so can not produce the interference, and the installation is dismantled all very convenient and fast. The two long cross rods and the laid bamboo yoke plates are simple in structure, workers can walk on the bamboo yoke plates conveniently, and safety is improved.
In this embodiment, the supporting bottom plate 19 has still been laid to ground along the length direction of basement outer wall horizontally between basement outer wall and the foundation ditch inner wall, and the supporting bottom plate upper surface is provided with mounting groove along basement outer wall length direction interval, vertical pole setting lower extreme correspondence is pegged graft in mounting groove. Like this, make things convenient for the installation location of vertical pole setting, supporting baseplate has improved construction platform lower extreme load area simultaneously, avoids vertical pole setting lower extreme to be absorbed in earth and influences construction platform stability. As optimization, the short cross bar 14, the first long cross bar 16 and the second long cross bar 17 are all made of phi 48 multiplied by 3.0 steel pipes, and have the advantages of low cost, convenient construction, stability and reliability. For optimization, the height distance between two adjacent rows of short transverse rods is 1.5 meters, and the horizontal distance between every two adjacent short transverse rods between every two adjacent rows of short transverse rods is 1.2 meters; the size can ensure the overall structural stability of the construction platform, can not waste too much materials, saves the cost and is very convenient for workers to climb up and down. As optimization, one end of the short cross rod is anchored into the inner wall of the foundation pit by 30 cm; the size can reduce the difficulty of anchoring. The construction is convenient, and the reliability of anchoring and bearing can be ensured.
During implementation, the vertical upright rods are arranged adjacent to the first long cross rod close to the inner wall of the foundation pit. This is because short horizontal pole and foundation ditch inner wall are fixed for the mode of anchor, and the short horizontal pole other end is for welding on the stagnant water bolt, and former steadiness is not like the latter, so set up vertical pole setting in being close to former position, can improve construction platform overall structure's stability and reliability better.
In this embodiment, in the process of adding PNC waterproof material into concrete for pouring to perform basement exterior wall waterproofing, when concrete is disposed, the apparatus is implemented by the waterproof concrete disposition device shown in fig. 3-5, which includes a concrete tank truck 21 and a stirring barrel 22, a plastic water bag 23 is disposed in the stirring barrel 22, the upper opening edge of the plastic water bag 23 is consistent with and connected with the upper opening edge of the stirring barrel 22, the length of the plastic water bag after being extended is equal to or higher than the depth of the stirring barrel, an electronic weighing device 24 is disposed below the plastic water bag at the bottom of the stirring barrel 22, the electronic weighing device 24 has a horizontally disposed weighing surface at the uppermost end, the weighing surface is located in the middle of the stirring barrel, a water inlet pipe 25 is further outwardly communicated with one side of the upper end of the stirring barrel 22, the inner end of the water inlet pipe 25 is hermetically connected to the interior of the plastic water bag 23, a water inlet switch valve 26 is mounted, a water outlet pipe 27 is further arranged on one side of the lower end of the stirring barrel 22 in an outward communication mode, the inner end of the water outlet pipe 27 is connected to the interior of the plastic water bag in a sealing mode, a water outlet switch valve 28 and a water pump 29 are arranged on the water outlet pipe 27, and the water outlet end of the water outlet pipe 27 is connected to an inlet of a stirring tank on the concrete tank truck 21.
Therefore, when the water-saving stirring tank is used, the water outlet switch valve can be closed firstly, the water inlet switch valve is opened, water is fed into the plastic water bag through the water inlet pipe, the water inlet switch valve is closed after the water enters the plastic water bag through the electronic weighing device, then the PNC waterproof materials with the corresponding proportion are added into the plastic water bag, after the water-saving stirring tank is uniformly stirred, the water outlet switch valve and the water pump are opened, the water uniformly mixed with the PNC waterproof materials is directly pumped into the stirring tank, and the concrete formula is added for stirring. Like this, rely on the agitator to realize directly adding in the concrete mixing jar after PNC waterproof material's stirring mixing earlier, guaranteed in the concrete homogeneity that PNC waterproof material sneaked into, and the promptness, make its and waterproof material self time condition that uses match, guaranteed good water-proof effects.
In this embodiment, still include automatic stirring device, automatic stirring device includes a tripod 30, tripod 30 includes three foot bars of upwards evenly distributed of circumference, motor 31 of foot bar inner fixed connection, foot bar length and agitator radius match and the crooked form that the foot bar outer end is used for with agitator edge joint for downwarping, the motor output end is connected with a vertical downwardly extending's (mixing) shaft 32, lower part position and be provided with stirring vane 33 at this lower extreme in (mixing) shaft 32 lower extreme extends to the agitator.
Like this, can rely on tripod foot pole joint to fix at the agitator rim for inside stirring vane deepened the agitator, rely on the motor to drive stirring vane and realize the stirring to waterproof material, convenient and fast just improves stirring effect more and does not influence the meter and weigh again.
In the embodiment, an intermediate plate 34 is further arranged between the electronic weighing device 24 and the plastic water bag 23, the intermediate plate 34 is horizontally arranged, the shape of the intermediate plate is consistent with the cross section of the inner cavity of the stirring barrel, a gap for the intermediate plate to slide up and down is reserved between the edge of the intermediate plate and the inner cavity of the stirring barrel, the upper surface of the intermediate plate is directly attached to the plastic water bag, and the middle of the lower surface of the intermediate plate is attached to the weighing surface of the electronic weighing device. Therefore, the weight of the plastic water bag can be better transferred to the electronic weighing device by the middle plate, and the weighing accuracy is improved. Further, the lower surface of the middle plate 34 is provided with a layer of elastic rubber material 35, so that the middle plate can be better attached to the weighing surface of the electronic weigher, and the electronic weigher can accurately weigh.
In this embodiment, the electronic weigher 24 has a display screen 36 on the side, and the side of the mixing tank opposite to the display screen is provided with an observation window. In this way, reading is facilitated.
In the embodiment, when the PNC waterproof material solution is coated on the intersection of the outer side of the raft foundation and the outer wall of the basement for waterproof construction, the PNC401 material and water are mixed and stirred uniformly according to the mass ratio of 5:3 to obtain the coating, the coating is coated on the intersection of the outer side of the raft foundation and the outer wall of the basement for two times, and when the coating of the first time is not sticky, the coating is coated for the second time. Therefore, the construction is simple, the leakage of the joint can be better prevented, and the integral waterproof effect of the underground building is ensured. The PNC401 is used for painting the building outer wall, the base surface of the part is required to be clean, moist and free of open water, the painting height extends 300mm above the water stop steel plate, the effective waterproof lap joint length is formed, and the peripheral waterproof quality is ensured.
The construction method of the above embodiment further has the following features:
1, the construction is convenient, safe and easy to ensure; the expansion interior (PNC 401) can be used for waterproof treatment of the upstream surface or the downstream surface of a concrete structure, the required working surface is small, technological operations such as dry scattering, brushing and the like can be adopted, waterproof construction is not required to be carried out in the narrow space outside a retaining wall, the danger of side slope collapse and object strike can be avoided, and the safety is high.
2, the cost is saved; the expanded internal transfer water-proofing method does not need a leveling layer and a protective layer, the working strength of brushing the outer wall is low, the required working surface is small, part of labor cost is saved, and the coating does not need to be specially protected when backfilling, laying steel bars or steel wire meshes or other conventional procedures are carried out. The later maintenance cost of the building structure is low, and the comprehensive cost is low.
3, the construction period is saved; the expansion interior transfer (PNC 803) is added to the basement outer wall in the base without the fertilizer groove, the construction of a forming wall and a unilateral formwork is not needed, the absolute construction period is not occupied, the expansion interior transfer (PNC 803) can be directly added in the concrete construction of the outer wall, the working strength is low, the working efficiency is high, and the construction period is saved to a great extent.
4, permanent water proofing; the expanded waterproof concrete allows the concrete to be breathable (breathing), does not allow water vapor to accumulate, keeps the concrete completely dry, inhibits or reduces the generation of the internal gaps of the concrete through material configuration, changes the characteristics of the formation and the size of the gaps, blocks the water passage in the concrete, and improves the compactness of the concrete to achieve the waterproof purpose. Meanwhile, the surface of the concrete is scratched, the internal transmission of water is not affected, and the permanent water resistance of the concrete is formed.
5, reliable quality and strong durability; the underground structure of the building has micro cracks not larger than 0.4mm, the injected active chemical substances can catalyze new crystals again to fill and seal the cracks, the service life of the building is prolonged, the economic life of the building is prolonged, high hydrostatic pressure can be borne, and permanent anti-seepage and anti-erosion protection is provided for the concrete structure no matter the underground structure comes from the upstream surface or the back surface, and the durability is enhanced.
6, green and environment-friendly; the expanded internal transfer product is nontoxic and tasteless, reduces chemical hazards existing on construction sites, avoids the generation of construction waste, and actively responds to 'green' construction and 'green' construction called by the nation.
Claims (6)
1. A waterproof construction method for the basement exterior wall of a building is characterized in that the method adopts a mode of adding a PNC803 waterproof material into the basement exterior wall to pour concrete to realize waterproof construction;
the method specifically comprises the following steps:
(1) roughening treatment; during raft foundation formwork pouring construction, integrally pouring a section of upward-protruding outer wall foundation at the edge of the raft foundation corresponding to the position of the basement outer wall, embedding vertically upward reinforcing steel bars in the outer wall foundation, embedding a water stop steel plate in the middle of the outer wall foundation, exposing half of the water stop steel plate out of the upper surface of the outer wall foundation, performing roughening treatment on the upper surface of the outer wall foundation before final setting of concrete to form a concave-convex surface, and washing the concave-convex surface with water;
(2) finishing the reinforcement binding of the basement outer wall by taking the embedded reinforcement in the outer wall foundation as the foundation;
(3) erecting a template; when the template is erected, the basement outer wall, the indoor beam plate and the inner wall are integrally erected, or a convex section of pouring cavity is formed at the position of the basement outer wall corresponding to the indoor beam plate and the inner wall; meanwhile, a blocking net is fixedly arranged at the joint of the basement outer wall, the indoor beam plate and the inner wall;
(4) pouring concrete, wherein the pouring concrete comprises a concrete configuration step and a pouring step; when pouring is carried out, concrete added with the PNC waterproof material is poured in the inner cavity of the corresponding template of the basement outer wall, and concrete not added with the PNC waterproof material is poured in the inner cavities of the corresponding templates of the indoor beam plate and the inner wall; when concrete is prepared, the concrete is prepared by adopting the following waterproof concrete preparation device, which comprises a concrete tank car and a stirring barrel, wherein a plastic water bag is arranged in the stirring barrel, the edge of an upper end opening of the plastic water bag is consistent with and connected with the edge of an upper end opening of the stirring barrel, the length of the plastic water bag after being extended is equal to or higher than the depth of the stirring barrel, an electronic weighing device is arranged at the bottom of the stirring barrel and below the plastic water bag, the electronic weighing device is provided with a horizontally arranged weighing surface which is arranged at the uppermost end and is arranged in the middle of the stirring barrel, one side at the upper end of the stirring barrel is also outwards communicated with a water inlet pipe, the inner end of the water inlet pipe is hermetically connected to the interior of the plastic water bag, a water inlet switch valve is arranged on the water inlet pipe, one side at the lower end of the stirring barrel is, the water outlet end of the water outlet pipe is connected to the inlet of a stirring tank on the concrete tank truck;
in the construction process, when the basement outer wall is poured to a height exceeding the height of a constructor and the template is installed and reinforced, a construction platform is installed on the outer side of the basement outer wall, and an operator stands on the construction platform to install and reinforce the upward template; the construction platform structure comprises a row of vertical upright rods which are vertically arranged and horizontally arranged between the basement outer wall and the foundation pit inner wall at intervals, wherein a plurality of rows of short transverse rods which are arranged at intervals along the vertical direction are horizontally arranged on the vertical upright rods, one ends of the short transverse rods are welded and fixed at the outer end of a poured basement outer wall water stop bolt, the other ends of the short transverse rods are anchored on the foundation pit inner wall, the short transverse rods and the vertical upright rods are fixed by fasteners, the upper surface of each row of short transverse rods is vertically lapped and provided with a first long transverse rod and a second long transverse rod along the horizontal direction, the first long transverse rods and the second long transverse rods are arranged at intervals, the length direction of the first long transverse rods and the length direction of the second long transverse rods are consistent with the length direction of the basement outer wall, the first long transverse rods and the second long;
(5) removing the formwork, wherein the concrete strength reaches more than 2.5MPa, and performing formwork removal construction;
after the basement outer wall is poured, when the outer side of the raft foundation and the intersection of the basement outer wall are subjected to waterproof construction in a PNC waterproof material solution painting mode, PNC401 materials and water are mixed and stirred uniformly according to the mass ratio of 5:3 to obtain a coating, the coating is painted on the intersection of the outer side of the raft foundation and the basement outer wall, painting is carried out in two times, and when the coating of the first time is not sticky, painting is carried out for the second time.
2. The waterproof construction method for the basement exterior wall of the building as claimed in claim 1, wherein a support bottom plate is further horizontally laid on the ground between the basement exterior wall and the inner wall of the foundation pit along the length direction of the basement exterior wall, mounting grooves are formed in the upper surface of the support bottom plate along the length direction of the basement exterior wall at intervals, and the lower ends of the vertical poles are correspondingly inserted into the mounting grooves.
3. The waterproof construction method for the external wall of the basement of the building as claimed in claim 1, wherein the waterproof concrete arrangement device further comprises an automatic stirring device, the automatic stirring device comprises a tripod, the tripod comprises three leg rods uniformly distributed in the circumferential direction, the inner ends of the leg rods are fixedly connected with a motor, the length of the leg rods is matched with the radius of the stirring barrel, the outer ends of the leg rods are bent downwards and used for being clamped with the edge of the stirring barrel, the output end of the motor is connected with a stirring shaft extending vertically downwards, the lower end of the stirring shaft extends to the middle lower part of the stirring barrel, and stirring blades are arranged at the lower end of the stirring shaft.
4. The waterproof construction method for the outer wall of the basement of the building as claimed in claim 1, wherein in the waterproof concrete configuration device, an intermediate plate is further arranged between the electronic weighing device and the plastic water bag, the intermediate plate is horizontally arranged and has a shape consistent with the cross section of the inner cavity of the stirring barrel, a gap for the intermediate plate to slide up and down is reserved between the edge of the intermediate plate and the inner cavity of the stirring barrel, the upper surface of the intermediate plate is directly attached to the plastic water bag, and the middle part of the lower surface of the intermediate plate is attached to the weighing surface of the electronic weighing device.
5. The waterproof construction method for the outer wall of the basement of the building as claimed in claim 1, wherein the electronic weighing device is provided with a display screen on the side surface, and the side surface of the stirring barrel opposite to the display screen is provided with an observation window.
6. The waterproof construction method for the basement exterior wall of the building as claimed in claim 1, wherein the basement exterior wall is cast in a layered, segmented and circulating manner by means of a layered, segmented and circulating casting method, the exterior wall is sequentially cast in a layered, segmented and circulating manner around the circumference along the periphery, and the layered thickness is not more than 500 mm; and each circle of joint is completed before the initial setting of the concrete, and the rotation is repeated in cycles until the casting and tamping of the outer wall are completed.
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| CN201811052233.0A CN109056844B (en) | 2017-02-27 | 2017-02-27 | Waterproof construction method for outer wall of basement of building |
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| CN201710107644.4A CN106836310B (en) | 2017-02-27 | 2017-02-27 | A kind of building basement external wall waterproof construction method |
| CN201811052233.0A CN109056844B (en) | 2017-02-27 | 2017-02-27 | Waterproof construction method for outer wall of basement of building |
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| CN201811052233.0A Active CN109056844B (en) | 2017-02-27 | 2017-02-27 | Waterproof construction method for outer wall of basement of building |
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| CN109137971A (en) * | 2018-08-28 | 2019-01-04 | 中国化学工程第十四建设有限公司 | The impervious construction technology of underground tank |
| CN110847445A (en) * | 2019-11-25 | 2020-02-28 | 苏州二建建筑集团有限公司 | Construction method for integrally forming outer wall and bottom plate of cast-in-place concrete structure of structure |
| CN113944262B (en) * | 2021-10-21 | 2023-04-14 | 武汉建工集团股份有限公司 | Construction method for foundation-column-free type deep foundation pit and outer wall integrated structure |
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| KR100367108B1 (en) * | 2000-05-12 | 2003-01-09 | 덕창건업 주식회사 | Drainage board and the drainage method using the same |
| CN2846084Y (en) * | 2005-09-14 | 2006-12-13 | 江苏省机电研究所有限公司 | Intelligent external additive producing device suitable for stirring station |
| CN202748112U (en) * | 2012-08-24 | 2013-02-20 | 徐州三信环保科技有限公司 | Slurry water recovery accurate weighing mechanism for mixing plant |
| CN103205979B (en) * | 2013-03-15 | 2015-04-08 | 中国十七冶集团有限公司 | Method for constructing large raft foundation under high temperature |
| CN103321257A (en) * | 2013-06-18 | 2013-09-25 | 浙江海天建设集团有限公司 | Anti-cracking seepage-proof construction method for ultra-long mass concrete structure basement |
| CN203440831U (en) * | 2013-07-25 | 2014-02-19 | 中国建筑土木建设有限公司 | Novel basement concrete shear wall guide wall structure |
| KR20150076547A (en) * | 2013-12-27 | 2015-07-07 | 한국파라마운트 주식회사 | Bentotex, bentosheet, bentosoil, bentospray, gaslayer, coverlayer, drainlayer, and cleanlayer combined with expansion, bindinggel, hydrogel, and cleanup functions |
| CN204343650U (en) * | 2014-12-11 | 2015-05-20 | 中建四局第六建筑工程有限公司 | Regularization outrigger wall-connecting piece through walls |
| CN104988955B (en) * | 2015-06-11 | 2017-07-07 | 中建一局集团第六建筑有限公司 | The anti-row's convolution waterproof system of ultra-deep basement and construction method |
| CN205043956U (en) * | 2015-09-14 | 2016-02-24 | 重庆建工新型建材有限公司 | Automatic allotment of concrete additive and interpolation device |
| CN205421912U (en) * | 2016-01-19 | 2016-08-03 | 中铁十二局集团有限公司 | Dish knot formula supports support body double flute steel joist and plays secondary support body system |
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| CN109056844A (en) | 2018-12-21 |
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