CN110777846A - Local reverse construction soil matrix construction method for high-rise residential buildings - Google Patents
Local reverse construction soil matrix construction method for high-rise residential buildings Download PDFInfo
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- CN110777846A CN110777846A CN201911004250.1A CN201911004250A CN110777846A CN 110777846 A CN110777846 A CN 110777846A CN 201911004250 A CN201911004250 A CN 201911004250A CN 110777846 A CN110777846 A CN 110777846A
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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
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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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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Abstract
The invention discloses a local reverse construction soil matrix construction method for high-rise residences, which comprises the following steps: constructing a lattice column of a pile foundation in a reverse construction area, wherein the lattice column is used for supporting a ring crown beam constructed in the later period; excavating the earthwork of the basement foundation pit, overetching to form an overexcavation section, and backfilling the overexcavation section with backfill sand; constructing a cushion layer on the backfilled sand and reserving a downward returning position of the shear wall, wherein the cushion layer is constructed until the elevation of the large surface at the top is equal to the elevation of the beam bottom of the conversion layer; throwing a shear wall formwork under the reserved lower returning position of the shear wall, and returning the bottom of the shear wall to the returned sand; binding column cap reinforcing steel bars of the lattice column of the pile foundation and arranging anchor bars for anchoring into the ring crown beam above the column cap reinforcing steel bars; inserting the dowel bars downwards at the downward returning position of the shear wall, and inserting the dowel bars into the backfill sand; and erecting a conversion layer template, binding conversion layer steel bars and pouring construction to finish the conversion layer, wherein the tops of the dowel bars are higher than the top elevation of the conversion layer. The construction method has the advantages of high construction speed, short period, complete reverse construction structure system, safety and reliability.
Description
Technical Field
The invention relates to a construction method of a high-rise dwelling house, in particular to a local reverse construction earth matrix construction method of the high-rise dwelling house.
Background
In the construction of the existing residential projects, the basement structure is generally completed first, then the superstructure is constructed, and then the decoration construction is carried out. However, for a residential group with a multi-storey basement, the underground structure has a large proportion and a long construction period, positive and negative zero-layer slabs need to be completed in advance for some projects, the requirement of a proprietor on node sale of buildings in advance is met, meanwhile, the total package entry time is short in construction time, the capital is low, the task is heavy, and a construction method combining the positive and negative of an innovative technology is urgently needed to meet the requirements of the proprietor on node sale construction period and quick capital recovery.
Disclosure of Invention
The invention mainly aims at the defects of the prior art and provides a local reverse construction soil matrix construction method for high-rise residences, which has the advantages of high construction speed, short period, complete reverse construction structure system, safety and reliability.
The technical scheme adopted by the invention is as follows: a local reverse construction soil matrix construction method for high-rise residences comprises the following steps:
constructing a lattice column of a pile foundation in a reverse construction area, wherein the lattice column is used for supporting a ring crown beam constructed in the later period;
excavating the earthwork of the basement foundation pit, overetching to form an overexcavation section, and backfilling the overexcavation section with backfill sand;
constructing a cushion layer on the backfilled sand and reserving a downward returning position of the shear wall, wherein the cushion layer is constructed until the elevation of the large top surface is equal to the elevation of the bottom of the transfer layer;
throwing a shear wall formwork under the reserved lower returning position of the shear wall, and returning the bottom of the shear wall to the backfill sand;
binding column cap steel bars of the lattice column of the pile foundation and arranging anchor bars for anchoring into the ring crown beam above;
inserting a dowel bar downwards at the downward returning position of the shear wall, wherein the dowel bar is inserted into the backfill sand;
erecting a conversion layer template, binding conversion layer steel bars and pouring construction to finish the conversion layer, wherein the tops of the inserting bars are higher than the top elevation of the conversion layer.
In some embodiments of the construction method of the present invention, after the construction of the conversion layer, the method further includes:
binding interlayer wall steel bars on the dowel bars, and erecting an interlayer wall template;
binding positive and negative zero-layer steel bars on the steel bars of the interlayer wall body and erecting a template;
and pouring to finish the interlayer wall and the positive and negative zero-layer floor slabs.
In some embodiments of the construction method of the present invention, a guide wall is disposed between the sandwich wall and the conversion layer.
In some embodiments of the construction method of the present invention, after the construction of the lattice column of the pile foundation is completed, precipitation construction is performed first, and then excavation of the earth of the basement foundation pit is performed.
In some embodiments of the construction method of the present invention, a top elevation of the pad layer at the crown beam position is lower than a top large surface elevation of the pad layer.
In some embodiments of the construction method of the invention, a felt is laid between the transfer layer and the cushion layer and between the crown beam and the cushion layer.
In some embodiments of the construction method, the horizontal ribs of the shear wall are bound in advance before the reinforcing steel bars of the transfer layer are bound.
In some embodiments of the construction method of the present invention, a steel bar protection cap is sleeved on an insertion section of the steel bar inserted into the backfill sand, and is tightly wrapped by a steel bar protection film, and the length of an effective protection area of the steel bar protection film is not less than the length of the insertion section.
In some embodiments of the construction method of the present invention, the conversion layer is reserved with a top-down pouring hole
In some embodiments of the construction method, the conversion layer comprises a conversion beam and a top plate, and when the conversion layer template is erected, a wood template and wood balk supporting system is adopted, and wood balk is adopted as a vertical rod and a keel for supporting the wood template.
By adopting the local reverse soil matrix construction method for the high-rise residential project, the positive and negative zero floor boards of the building can be constructed in advance, the node requirements of building selling in advance are met, and the owner can recover the fund as soon as possible for project engineering construction and recover the cost of building selling as soon as possible for project engineering construction. The construction speed is fast, the period is short, the reverse construction structure system is complete, and the construction method is safe and reliable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a local reverse soil matrix construction method for high-rise residences according to an embodiment of the invention.
Fig. 2 is a floor plan of a conversion structure in an embodiment of the present invention.
Fig. 3 is a plan view of a crown beam in an embodiment of the present invention.
FIG. 4 is a floor plan of a formal configuration in an embodiment of the present invention.
Fig. 5 is a plan view of a converted structure in an embodiment of the invention.
FIGS. 6 to 10 are construction drawings of each step of the construction method according to the embodiment of the present invention.
The corresponding relations of the marks in the drawings are as follows:
1-medium sand, 2-cushion layer, 3-conversion beam, 4-dowel bar, 5-shear wall, 6-secondary pouring cushion layer, 7-wood purlin template support system, 8-conversion layer floor slab, 9-linoleum, 11-lattice column, 12-angle steel, 13-steel batten plate, 14-reinforced concrete cap, 15-anchor bar, 16-cap lower steel bar, 17-cap steel bar, 18-ring crown beam, 21-garage top plate, 22-garage top plate sling bar, 23-water stop steel plate, 24-outer wall guide wall, 25-brick moulding bed, 26-wood purlin template support system sling bar protection, 27-backfill soil, 31-reserved pouring hole, 33-underground one-layer post-pouring shear wall, 34-positive and negative zero-layer floor slab, 35-interlayer outer wall, 36-superstructure flail.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The invention is described in further detail below with reference to the figures and specific examples.
Referring to fig. 1, the embodiment of the invention provides a local reverse soil matrix construction method for a high-rise residence, which can finish the positive and negative zero floor boards of a building in advance, meet the node requirements of building selling in advance, and enable an owner to recover the cost of building selling as soon as possible for project engineering construction. The construction speed is fast, the period is short, the reverse construction structure system is complete, and the construction method is safe and reliable. As shown in the figure, the construction method of the local reverse soil matrix of the high-rise residence mainly comprises the following construction steps:
step S1: constructing a lattice column of a pile foundation in a reverse construction area, wherein the lattice column is used for supporting a ring crown beam constructed in the later period;
step S2: excavating the earthwork of the basement foundation pit, overetching to form an overexcavation section, and backfilling the overexcavation section with backfill sand;
step S3: constructing a cushion layer on the backfilled sand and reserving a downward returning position of the shear wall, wherein the cushion layer is constructed until the elevation of the large surface at the top is equal to the elevation of the beam bottom of the conversion layer;
step S4: throwing a shear wall formwork under the reserved lower returning position of the shear wall, and returning the bottom of the shear wall to the returned sand;
step S5: binding column cap reinforcing steel bars of the lattice column of the pile foundation and arranging anchor bars for anchoring into the ring crown beam above the column cap reinforcing steel bars;
step S6: inserting the dowel bars downwards at the downward returning position of the shear wall, and inserting the dowel bars into the backfill sand;
step S7: and erecting a conversion layer template, binding conversion layer steel bars and pouring construction to finish the conversion layer, wherein the tops of the dowel bars are higher than the top elevation of the conversion layer.
In brief, with reference to fig. 2 to 10, the construction method of the present invention includes the following steps: pile foundation lattice column construction → precipitation construction → earthwork excavation → back filling sand → cushion layer construction → lower swing shear wall formwork → lattice column cap reinforcement → conversion layer hidden column dowel → conversion layer beam reinforcement → conversion layer shear wall dowel → conversion layer template support → concrete pouring → interlayer wall reinforcement → interlayer formwork support → positive and negative layer beam slab reinforcement → interlayer formwork reinforcement → positive and negative layer slab concrete pouring.
The method comprises the following specific steps:
firstly, constructing the pile foundation lattice column 11, namely constructing the pile foundation lattice column 11 in a reverse construction area, wherein the pile foundation lattice column 11 is used for supporting a ring crown beam 18 for later construction, and the ring crown beam 18, the conversion beam 3 and the conversion floor slab 8 are integrated, as shown in fig. 2 and 3.
And step two, dewatering construction, wherein a reverse construction method construction foundation trench is required to be in a dry state due to high water level, and a dewatering well is arranged in a proper area. Before the foundation pit is excavated, the underground water level is ensured to be below 500mm of the excavation surface.
And step three, earth excavation and sand backfilling, wherein the excavation depth of the foundation pit is integrally over-excavated by one meter, and medium sand 1 is adopted for backfilling. Backfilling is carried out in a mode of matching of machinery and manpower, and tamping is carried out by a small-sized tamping machine, as shown in figure 6.
Step four, constructing a cushion layer 2, after the backfilled sand is leveled, widening the bottom of the foundation pit to reserve the positions of the shear wall dowel bars, integrally pouring the concrete cushion layer 2 at the rest positions, wherein the strength grade of the cushion layer concrete is C15, the thickness is 150mm, the elevation of the top of the cushion layer is the elevation of the bottom of the conversion beam 3, because the annular crown beams 18 are fewer, the elevation of the top of the bottom of the cushion layer at the position of the annular crown beam is 10cm lower than that of the top of the cushion layer, after the cushion layer integrally reaches the strength, paying off the large cushion layer 2, and accurately positioning the shear wall, the annular crown beams and the conversion beam. And a felt 9 is paved between the conversion beam and the annular crown beam and between the cushion layers, so that the cushion layers can be conveniently chiseled out at the later stage. And drainage ditches are arranged around the bottom of the tank, and a water collecting well is arranged at the corner.
And fifthly, a shear wall formwork is thrown downwards, after the cushion layer 2 reaches the strength capable of being loaded with people, the shear wall, the ring crown beam and the conversion beam are accurately positioned by paying off, in order to facilitate the butt joint construction of a layer of shear wall loaded at the later stage of the engineering, the height of the shear wall returning to 200mm downwards is required to be considered, the two sides of the shear wall returning to 200mm downwards are optimized and then supported by adopting a template, the gap position between the shear wall and the original cushion layer is a secondary pouring concrete cushion layer 6, the bottom of the shear wall 5 is medium sand 1 at the early stage, and the subsequent joint bars of the shear wall 5 are convenient.
Sixthly, binding the column caps of the lattice columns 11 with reinforcing steel bars, wherein the crossed nodes of the annular crown beam 18 of the inverted construction seat are complex and need to be deepened, welding anchor bars 15 on angle steel of the lattice columns at the crossed positions of the lattice columns 11 and the annular crown beam 18, and adding reinforced concrete column caps 14 to improve the connection integrity between the lattice columns 11 and the annular crown beam 18, as shown in fig. 8.
And seventhly, inserting ribs into the wall columns, and in order to ensure that when the shear wall of the reverse construction method is connected with the shear wall of the normal construction method, an inclined pouring dustpan opening is conveniently erected, and simultaneously, the vibration of the intersection part of the shear wall is compact, and the shear wall needs to be thrown downwards by 200mm from the bottom of the beam. The diameter of the wall column steel bar is more than or equal to 16mm, and the wall column steel bar is connected by straight threads; binding and lapping are adopted when the diameter of the wall body steel bar is less than 16 mm. The shear wall steel bars and the hidden column steel bars are connected in a staggered mode according to the 50% lap joint rate. The thickness of the backfill sand fully considers the length of the downward insertion of the reinforcing steel bars. The embedded column steel bars are inserted into the sand, and the position positioning needs to be accurate; binding 2 paths of hidden column stirrups in the shear wall, and then binding 1 path of 5cm starting stirrups; the horizontal ribs of the shear wall are tied in the shear wall in advance to prevent the horizontal ribs of the shear wall from being tied after the beam reinforcing steel bars are tied. And sleeving the steel bar protective cap on the steel bar sleeve inserted into the sand, wrapping the steel bar protective cap with a plastic film to form a plurality of layers, compacting the layers, and wrapping the layers by using the transparent adhesive tape for 2 layers until the length of the protection area, which is not easy to damage the steel bar protective film, is the steel bar insertion length. The method not only reduces the corrosion of the steel bar, but also can accurately determine the insertion length of the steel bar, and reduces the engineering quantity of repeated measurement.
And step eight, erecting a template, wherein a beam side mold and a top plate mold at the position of the conversion layer adopt a wood template and wood purlin supporting system, wood purlin is adopted as a vertical rod and a keel, the vertical rod adopts double wood purlin, and a small template is arranged below the vertical rod wood purlin, as shown in fig. 9.
Step nine, pouring hole reservation is carried out by a reverse construction method, concrete pouring holes need to be reserved on the conversion layer and the positive and negative zero plates during construction of the concrete pouring holes, convenience is brought to concrete pouring of a subsequent negative layer of shear wall, the reserved holes avoid rooms needing water proofing such as a toilet and a kitchen as far as possible, the reserved holes are made of PVC pipes with the diameter of 150mm, the length of the PVC pipes is 250mm, the distance between the reserved holes is not more than 1000mm, the distance from the center of each reserved hole to the edge of the shear wall is 125mm, and the reserved holes do not need to be reserved on walls around the elevator shaft and the stairway.
Step ten, processing the joint of the garage and the garage top plate 21 at the joint of the garage and the building seat, welding a 300mm x 3mm water stop steel plate 23 on the garage top plate 21, and welding a 300mm x 3mm water stop steel plate 23 on the outer shear wall of the building seat on the upper part of the floor slab of the transfer floor.
Step eleven, steel bar protection is reserved, a garages top plate sling bar is protected, a wood purlin is erected at the end of the sling bar to serve as a keel, a template is fully paved on the wood purlin, the upper wall structure sling bar 36 is protected by a pvc sleeve, steel bar corrosion is reduced, after earth excavation is completed, construction is carried out, and then when the lower portion of the earth excavation is constructed to the garages top plate, the garages steel bars are connected, as shown in fig. 10.
In addition, as shown in fig. 10, the steel bars of the sandwich wall body are bound on the dowel bars, the template of the sandwich wall body 35 is erected, the steel bars of the positive and negative zero floors 34 are bound on the steel bars of the sandwich wall body 35, the template is erected, and finally the sandwich wall body 35 and the positive and negative zero floors 34 are poured, so that the positive and negative zero floors of the building can be constructed in advance, the node requirements of the pre-sold building are met, and the owner can recover the fund as soon as possible for project engineering construction.
By adopting the construction method for the local reverse soil matrix construction of the high-rise residential project, the positive and negative zero floor boards of the building can be constructed in advance, the node requirement of building selling in advance is met, and the owner can recover the fund as soon as possible and use the fund for project engineering construction. The owner can recover the cost of selling the building as soon as possible, and the cost is used for project engineering construction. The construction speed is fast, the period is short, the reverse construction structure system is complete, and the construction method is safe and reliable.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A local reverse construction soil matrix construction method for high-rise residences is characterized by comprising the following steps:
constructing a lattice column of a pile foundation in a reverse construction area, wherein the lattice column is used for supporting a ring crown beam constructed in the later period;
excavating the earthwork of the basement foundation pit, overetching to form an overexcavation section, and backfilling the overexcavation section with backfill sand;
constructing a cushion layer on the backfilled sand and reserving a downward returning position of the shear wall, wherein the cushion layer is constructed until the elevation of the large top surface is equal to the elevation of the bottom of the transfer layer;
throwing a shear wall formwork under the reserved lower returning position of the shear wall, and returning the bottom of the shear wall to the backfill sand;
binding column cap steel bars of the lattice column of the pile foundation and arranging anchor bars for anchoring into the ring crown beam above;
inserting a dowel bar downwards at the downward returning position of the shear wall, wherein the dowel bar is inserted into the backfill sand;
erecting a conversion layer template, binding conversion layer steel bars and pouring construction to finish the conversion layer, wherein the tops of the inserting bars are higher than the top elevation of the conversion layer.
2. The method for constructing a local reversed soil formwork of a high-rise dwelling house according to claim 1, further comprising the steps of, after the construction of the transfer floor is completed:
binding interlayer wall steel bars on the dowel bars, and erecting an interlayer wall template;
binding positive and negative zero-layer steel bars on the steel bars of the interlayer wall body and erecting a template;
and pouring to finish the interlayer wall and the positive and negative zero-layer floor slabs.
3. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: and a guide wall is arranged between the interlayer wall body and the conversion layer.
4. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: after the construction of the pile foundation lattice column is completed, precipitation construction is firstly carried out, and then excavation of the basement foundation pit earthwork is carried out.
5. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: the top elevation of the cushion layer at the position of the crown beam is lower than the top large surface elevation of the cushion layer.
6. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: and felts are paved between the conversion layer and the cushion layer and between the ring crown beam and the cushion layer.
7. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: and binding the horizontal ribs of the shear wall in advance before binding the reinforcing steel bars of the conversion layer.
8. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: the inserted section of the inserted bar inserted into the backfill sand is sleeved with a steel bar protective cap and is tightly wrapped by a steel bar protective film, and the length of an effective protective area of the steel bar protective film is not less than that of the inserted section.
9. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: and a reverse construction method pouring hole is reserved in the conversion layer.
10. The method for constructing a local reverse soil mould of a high-rise residence according to claim 1, wherein: the conversion layer comprises a conversion beam and a top plate, when the conversion layer template is erected, a wood template and wood balk supporting system is adopted, and wood balk is used as a vertical rod and a keel for supporting the wood template.
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| CN201911004250.1A CN110777846A (en) | 2019-10-22 | 2019-10-22 | Local reverse construction soil matrix construction method for high-rise residential buildings |
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| CN114215356A (en) * | 2021-12-10 | 2022-03-22 | 中国二十冶集团有限公司 | Construction method for avoiding cold bridge generation in building entrance hall |
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Application publication date: 20200211 |
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