CN110725324A - Shear wall high-limb guide wall conversion supporting structure and construction method thereof - Google Patents
Shear wall high-limb guide wall conversion supporting structure and construction method thereof Download PDFInfo
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- CN110725324A CN110725324A CN201911033373.8A CN201911033373A CN110725324A CN 110725324 A CN110725324 A CN 110725324A CN 201911033373 A CN201911033373 A CN 201911033373A CN 110725324 A CN110725324 A CN 110725324A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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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Abstract
The invention discloses a shear wall high-limb guide wall conversion supporting structure and a construction method thereof, belonging to the field of constructional engineering.A plain concrete filling layer is arranged between a foundation slab and a supporting pile of the shear wall high-limb guide wall conversion supporting structure, the plain concrete filling layer is connected with a shear wall guide wall, the shear wall guide wall is connected with a support-changing steel beam, the foundation slab is connected with a support-changing bracket column, and the support-changing steel beam is connected with the support-changing bracket column; the supporting piles are connected with the supporting steel beams, the foundation bottom plate is connected with the supporting bracket columns, and supporting steel pipes are arranged between the supporting steel beams and the supporting bracket columns; the supporting piles are connected with the supporting crown beams, so that the rigidity is high, the deformation is small, the supporting conversion is effectively completed, and the safety is good; the raw materials are convenient to obtain, the construction is simple and convenient, and the welding processing is firm and reliable; the method has the advantages of realizing effective combination of supporting force transmission and a permanent structure, solving the position contradiction between the shear wall and the supporting steel beam, reducing the hidden danger of water leakage of the outer wall, controlling the construction cost and having good construction effect.
Description
Technical Field
The invention belongs to the technical field of building construction, relates to a deep foundation pit inclined cast support construction technology, particularly relates to a construction technology that inclined cast supports influence structure construction and need support replacement, and particularly relates to a shear wall high-limb guide wall conversion support structure and a construction method thereof.
Background
Along with the increasing of land cost of real estate enterprises, the demand of engineering projects on underground garages is higher and higher, and in order to control construction cost, when construction design is carried out in limited construction land, the distance between the garage and a building seat outside the garage is closer, and more projects are needed for designing a foundation pit inclined throwing support design mode; and the inclined throwing support passes through the outer wall of the basement structure, so that the position of the outer wall conflicts with that of the support steel beam or the throwing support position needs to be subjected to hole reserving post-treatment during the construction of the basement structure, thereby increasing the construction difficulty of the underground structure, greatly increasing the water leakage risk of the outer wall and causing the problem of potential safety hazard to the use of subsequent engineering.
Disclosure of Invention
The invention provides a shear wall high-limb guide wall conversion supporting structure and a construction method thereof, and aims to solve the problems that when a foundation pit inclined throwing support structure is adopted in the prior art, inclined throwing support penetrates through the outer wall of a basement structure, so that the position of the outer wall conflicts with a supporting steel beam, or the throwing support position needs to be subjected to hole reserving post-treatment in the construction process of the basement structure, so that the construction difficulty of the underground structure is increased, the risk of water leakage of the outer wall is greatly increased, and potential safety hazards are caused to the use of subsequent engineering.
In order to achieve the purpose, the invention adopts the following technical scheme:
a shear wall high limb guide wall conversion supporting structure comprises a transverse foundation bottom plate arranged on a transverse foundation waterproof protective layer; the left end of the foundation waterproof protective layer is connected with a vertical supporting pile, a plain concrete filling layer is arranged between the foundation bottom plate and the supporting pile, the height of the plain concrete filling layer is greater than that of the foundation bottom plate, the right side face of the plain concrete filling layer above the foundation bottom plate is connected with the left side face of a vertical shear wall guide wall, the right side face of the shear wall guide wall is connected with the left end of a transverse support-changing steel beam, a vertical support-changing bracket column is connected to the foundation bottom plate, and inclined support-changing I-steel is connected between the right end of the support-changing steel beam and the support-changing bracket column; the top of the shear wall guide wall is connected with a vertical water stop steel plate; the upper part of the supporting pile is connected with the left end of a transverse supporting steel beam which is positioned above the shear wall guide wall and the plain concrete filling layer, a vertical supporting bracket column which is positioned on the right side of the supporting bracket is connected to the foundation bottom plate, and an inclined supporting steel pipe is connected between the right end of the supporting steel beam and the supporting bracket column; the upper end of the supporting pile is connected with a transverse supporting crown beam.
According to the shear wall high-limb guide wall conversion supporting structure, the support-changing I-shaped steel has the characteristics of high rigidity, small deformation, convenience in standard section size selection, capability of freely selecting the shape according to the characteristics and requirements of engineering design, capability of effectively completing support conversion and good safety; the support-replacing steel beam, the support-replacing I-steel and the support-replacing bracket column are all machined parts of I-steel or I-steel and steel plates, raw materials are convenient to obtain, the construction mode is simple and convenient, and welding processing is firm; the support is replaced by adopting a high-limb guide wall mode, so that the effective combination of support force transmission and a permanent structure is realized, the position contradiction between a shear wall and a support steel beam is solved, the potential water leakage hazard of an outer wall is reduced, and the engineering construction cost is controlled; the support-replacing I-shaped steel can ideally replace the original support member, the field monitoring data is basically consistent with the data before support replacement, no obvious change exists, and the construction effect is good.
In another aspect, the present invention provides a construction method of a conversion support structure of a shear wall and a high-limb guide wall according to an aspect of the present invention, including the following steps,
firstly, measuring and paying off, and determining the positions of a support changing I-steel, a support changing cow leg column and a support changing steel beam through paying off measurement;
secondly, pre-burying reserved ribs of the support-replacing cow leg column and the support-replacing steel beam, binding a foundation slab and a shear wall guide wall after determining the positions of the support-replacing cow leg column and the support-replacing steel beam, and pre-burying the reserved ribs of the support-replacing cow leg column and the support-replacing steel beam at the positions of the support-replacing cow leg column and the support-replacing steel beam;
thirdly, pouring concrete, pouring the concrete of the shear wall guide wall and the bottom plate structure, and pouring a plain concrete filling layer between the shear wall guide wall and the support pile;
fourthly, curing the concrete, and after the concrete is poured, performing curing and technical intermittence;
fifthly, mounting a support replacing system, including mounting a support replacing steel beam and mounting a support replacing I-shaped steel; when the support-replacing steel beam is installed, the support-replacing steel beam is welded and installed on the upper portion of the shear wall guide wall through the reserved ribs of the support-replacing steel beam; when the support-replacing I-shaped steel is installed, the support-replacing I-shaped steel is processed according to the actual measurement distance between the support-replacing steel beam and the pre-embedded support-replacing bracket column, and the support-replacing I-shaped steel is welded, connected and fixed;
sixthly, dismantling the original steel pipe support system, wherein the dismantling of the support steel pipe, the dismantling of the support steel beam and the dismantling of the support bracket column are included; the support steel pipe is dismantled by utilizing a cutting tool after the support-replacing I-shaped steel is installed and the concrete reaches the preset strength; the support steel beam is dismantled by utilizing a cutting tool after the support steel pipe is dismantled; when the supporting ox leg column is dismantled, the supporting ox leg column is cut and dismantled along the top surface of the foundation bottom plate through a cutting tool;
and seventhly, performing subsequent construction, namely removing and chiseling the support crown beam protruding from the top after the original steel pipe support system is removed, and preparing for performing subsequent structural construction.
The invention can achieve the following beneficial effects:
the shear wall high-limb guide wall conversion support structure and the construction method thereof have the advantages of large rigidity, small deformation, convenience in standard section size selection, capability of effectively completing support conversion according to the characteristics of engineering design and the characteristic of free type selection according to requirements, and good safety; the raw materials are convenient to obtain, the construction mode is simple and convenient, and the welding processing is firm; the method realizes the effective combination of supporting force transmission and a permanent structure, solves the position contradiction between the shear wall and the supporting steel beam, reduces the hidden danger of water leakage of the outer wall and controls the engineering construction cost; the method can ideally replace the original support member, the field monitoring data is basically consistent with the data before support replacement, and the construction effect is good.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a support and support changing structure of a shear wall high limb guide wall conversion support structure of the invention.
Fig. 2 is a schematic view of a support-replacing cow leg column of the shear wall high-limb guide wall conversion support structure of the invention.
Fig. 3 is a schematic view of a support-changing steel beam of the shear wall high limb guide wall conversion support structure of the invention.
Fig. 4 is a schematic view of hoisting a support steel pipe of the shear wall high-limb guide wall conversion support structure.
Fig. 5 is a structural diagram of a shear wall embedded iron of the shear wall high-limb guide wall conversion support structure of the invention.
Fig. 6 is a schematic view of the foundation slab embedded iron of the shear wall high-limb guide wall conversion support structure of the invention.
In the figure, 1 is a foundation waterproof protective layer, 2 is a foundation bottom plate, 3 is a supporting bracket column, 4 is a supporting steel pipe, 5 is a supporting steel beam, 6 is a supporting crown beam, 7 is a supporting pile, 8 is a support-replacing bracket column, 9 is support-replacing I-steel, 10 is a support-replacing steel beam, 11 is a shear wall guide wall, 12 is a water stop steel plate, and 13 is a plain concrete filling layer; 14 is a steel wire rope, and 15 is shear wall embedded iron.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
A shear wall high limb leads wall conversion bearing structure, please see figure 1, including the horizontal foundation slab 2 set up on the horizontal foundation waterproof protective layer 1; the left end of a foundation waterproof protective layer 1 is connected with a vertical supporting pile 7, a plain concrete filling layer 13 is arranged between a foundation slab 2 and the supporting pile 7, the height of the plain concrete filling layer 13 is greater than that of the foundation slab 2, the right side surface, located above the foundation slab 2, of the plain concrete filling layer 13 is connected with the left side surface of a vertical shear wall guide wall 11, the right side surface of the shear wall guide wall 11 is connected with the left end of a transverse support-changing steel beam 10, please see fig. 2, a vertical support-changing bracket column 8 is connected to the foundation slab 2, and inclined support-changing steel 9 is connected between the right end of the support-changing steel beam 10 and the support-changing bracket column 8; the top of the shear wall guide wall 11 is connected with a vertical water stop steel plate 12; referring to fig. 3, the upper part of a support pile 7 is connected with the left end of a transverse support steel beam 5 which is positioned above a shear wall guide wall 11 and a plain concrete filling layer 13, a foundation slab 2 is connected with a vertical support bracket column 3 which is positioned on the right side of a support replacement bracket 8, and an inclined support steel pipe 4 is connected between the right end of the support steel beam 5 and the support bracket column 3; the upper end of the supporting pile 7 is connected with a transverse supporting crown beam 6.
According to the shear wall high-limb guide wall conversion supporting structure, the support-changing I-shaped steel 9 has the characteristics of high rigidity, small deformation, convenience in standard section size selection, capability of freely selecting the shape according to the characteristics and requirements of engineering design, capability of effectively completing support conversion and good safety; the support-replacing steel beam 10, the support-replacing I-steel 9 and the support-replacing bracket column 8 are all machined parts of I-steel or I-steel and steel plates, the raw materials are convenient to obtain, the construction mode is simple and convenient, and the welding processing is firm; the support is replaced by adopting a high-limb guide wall mode, so that the effective combination of support force transmission and a permanent structure is realized, the position contradiction between a shear wall and a support steel beam 5 is solved, the potential water leakage hazard of an outer wall is reduced, and the engineering construction cost is controlled; the support-replacing I-shaped steel 9 can ideally replace the original support member, the on-site monitoring data is basically consistent with the data before support replacement, no obvious change exists, and the construction effect is good. The height of the cross section of the shear wall is about 500mm above the foundation slab, while the height of the shear wall high limb guide wall of the invention is more than 1000mm and less than 2000 mm.
Example 2
A construction method of a shear wall high-limb guide wall conversion support structure according to embodiment 1 includes the following steps,
firstly, measuring and paying off, and determining the positions of a support changing I-shaped steel 9, a support changing bracket column 8 and a support changing steel beam 10 through paying off measurement;
secondly, pre-burying reserved ribs of the support-replacing bracket column 8 and the support-replacing steel beam 10, binding the foundation slab 2 and the shear wall guide wall 11 after determining the positions of the support-replacing bracket column 8 and the support-replacing steel beam 10, and pre-burying the reserved ribs of the support-replacing bracket column 8 and the support-replacing steel beam 10 at the positions of the support-replacing bracket column 8 and the support-replacing steel beam 10;
thirdly, pouring concrete, pouring the concrete of the shear wall guide wall 11 and the bottom plate structure, and pouring a plain concrete filling layer 13 between the shear wall guide wall 11 and the support piles 7;
fourthly, curing the concrete, and after the concrete is poured, performing curing and technical intermittence;
fifthly, mounting a support replacing system, including mounting a support replacing steel beam 10 and mounting a support replacing I-steel 9; when the support-replacing steel beam 10 is installed, the support-replacing steel beam 10 is welded and installed on the upper portion of the shear wall guide wall 11 through the reserved ribs of the support-replacing steel beam 10; when the support-replacing I-shaped steel 9 is installed, the support-replacing I-shaped steel 9 is processed according to the actual measurement distance between the support-replacing steel beam 10 and the pre-embedded support-replacing bracket column 8, and the support-replacing I-shaped steel 9 is welded, connected and fixed;
sixthly, dismantling the original steel pipe support system, wherein the steel pipe support system comprises dismantling a support steel pipe 4, dismantling a support steel beam 5 and dismantling a support ox leg column 3; the support steel pipe 4 is disassembled by cutting the support steel pipe 4 by using a cutting tool after the support-replacing I-shaped steel 9 is installed and the concrete reaches the preset strength; the support steel beam 5 is dismantled by a cutting tool after the support steel pipe 4 is dismantled; when the supporting ox leg columns 3 are dismantled, the supporting ox leg columns 3 are cut and dismantled along the top surfaces of the foundation bottom plates 2 through cutting tools;
and seventhly, performing subsequent construction, namely removing and chiseling the support crown beam 6 protruding from the top after the original steel pipe support system is removed, and preparing for subsequent structural construction.
Example 3
The construction method for the shear wall high-limb guide wall conversion support structure in embodiment 2 can further include, in the first step, avoiding a vertical structure in a building when determining the position of the strut-changing cow leg column 8 during measurement and setting-out.
Wherein the spacing of the support change support structures can be determined from the calculation. The position of the leg-replacing prop 8 can be marked on the waterproof basic protection layer 1 through a snapping line. The position of the support-replacing steel beam 10 can be marked on the vertical steel bars of the shear wall guide wall 11.
Still further, the second step, pre-buried in trading the reservation muscle that props bracket post 8 and prop girder steel 10, when trading the position department pre-buried of propping bracket post 8 and trading the girder steel 10 and trade the reservation muscle that props bracket post 8 and trade the girder steel 10, when trading the 8 position ligatures that prop bracket post during reserving the muscle, and upper strata and lower floor ligature bracket additional reinforcement respectively on the reservation muscle, trade prop bracket post 8 with bracket additional reinforcement welded fastening.
And furthermore, in the second step, pre-burying reserved ribs for replacing the strut cow leg columns 8 and the strut steel beams 10, respectively binding shear wall additional steel bars on the shear wall steel bars on the inner side and the outer side of the shear wall, and welding and fixing the reserved ribs for replacing the strut steel beams 10 and the shear wall additional steel bars.
Referring to fig. 5 and 6, the reserved bars of the support-replacing steel beam 10 may be embedded irons 15 of the shear wall.
And furthermore, in the second step, pre-burying and replacing the reserved ribs for supporting the cow leg column 8 and the steel beam 10, the top surface of the steel plate for supporting the cow leg column 8 is flush with the upper surface of the foundation slab 2.
Furthermore, in the second step, the foundation slab 2 and the shear wall guide wall 11 are bound, and when the reserved ribs for replacing the strut cow leg column 8 and the strut steel beam 10 are pre-embedded at the positions of the strut cow leg column 8 and the strut steel beam 10, the shear wall guide wall 11 is provided with reserved holes, and the reserved ribs for replacing the strut cow leg column 8 and the strut steel beam 10 extend out of the shear wall guide wall 11 through the reserved holes.
The number of the additional reinforcing steel bars of the bracket can be four, the length of the additional reinforcing steel bars of the bracket can be 400mm, the diameter of the additional reinforcing steel bars of the bracket can be 16mm, and the structural stress capacity of the foundation slab can be improved through the additional reinforcing steel bars of the bracket. The number of the additional reinforcing steel bars of the shear wall can be four on the inner side and the outer side, the length of the additional reinforcing steel bars of the shear wall can be 400mm, the diameter of the additional reinforcing steel bars of the shear wall can be 12mm, and the additional reinforcing steel bars of the shear wall can ensure accurate positioning and fixing. The diameter of the preformed hole can be 18mm, and the length of the preformed ribs extending out of the shear wall guide wall 11 of the replacement support bracket column 8 and the replacement support steel beam 10 can be 10 mm. The water stop steel plate 12 may have a size of 300 × 4 mm.
Further, in the third step, after the concrete of the shear wall and the bottom plate structure is poured in the concrete, after a preset time, the side mold of the shear wall guide wall 11 is firstly detached, impurities between the shear wall guide wall 11 and the support piles 7 are cleaned, and then the plain concrete filling layer 13 between the shear wall and the support piles 7 is poured.
After the pre-embedding of the replacement support cow leg column 8 and the reserved ribs of the replacement support steel beam 10 are completed, checking and accepting can be performed firstly, and then the third step is performed to pour concrete; during pouring, the position of the support-changing corbel column 8 and the reserved steel bars thereof is preferably protected, and the vibrating rod is strictly forbidden to be directly placed at the corresponding position in the vibrating process. After the concrete of the shear wall and the bottom plate structure is poured, after the preset time which can be 24 hours passes, firstly, removing a side die of the shear wall guide wall 11, cleaning impurities between the shear wall guide wall 11 and the support piles 7, and then pouring a plain concrete filling layer 13 between the shear wall and the support piles 7; the plain concrete filling layer 13 is preferably compacted by vibration, and the height of the upper surface of the plain concrete filling layer 13 is less than the height of the top end of the shear wall guide wall 11, and preferably, the height of the upper surface of the plain concrete filling layer 13 is 25mm less than the height of the top end of the shear wall guide wall 11.
And in the fourth step, in concrete curing, after concrete pouring is completed, when curing and technical intermittence are carried out, watering curing is carried out on the foundation slab 2, film coating curing is carried out on the shear wall guide wall 11, and soaking curing is carried out on the plain concrete filling layer 13.
Wherein, when the foundation slab 2 is watered and maintained, the concrete surface of the foundation slab 2 is kept moist; when the shear wall guide wall 11 is subjected to film coating maintenance, the shear wall guide wall 11 can be coated with the maintenance liquid first and then subjected to film coating maintenance, the maintenance effect can be checked in real time, and the maintenance effect can be supplemented by adopting spray maintenance if necessary; when plain concrete filling layer 13 is soaked and maintained, the running water can be put into the recess in plain concrete filling layer 13 regional department, soaks and maintains, and the degree of depth of this recess can be 25 mm.
Furthermore, in the fifth step, in the installation of the support replacing system, when the support replacing steel beam 10 is installed, a connecting hole is formed in the connecting plate of the support replacing steel beam 10, the reserved rib of the support replacing steel beam 10 is inserted into the connecting hole, and then welding is carried out.
After the shear wall guide wall 11 is maintained for a preset time, wherein the preset time can be 5 days, after the strength of the shear wall guide wall meets the installation requirement of the support-replacing steel beam 10, the reserved steel bars are cleaned, then circular holes with the diameter of 18mm are formed in the connecting plate of the support-replacing steel beam 10, and the reserved steel bars of the support-replacing steel beam 10 are inserted into the connecting plate to be welded; trade and prop girder steel 10 and can be hoisted to the connecting plate position by the tower crane, after adjusting whole roughness, be connected with connecting plate spot welding, after the electric welding is accomplished, to the connecting plate with trade prop the full weld between the girder steel 10.
In order to improve the installation accuracy, preferably, before the support joist steel 9 is installed, actual measurement is carried out on the support joist steel 9 one by one, the length and the connection angle of the support joist steel 9 are determined, the support joist steel 9 is processed according to the actual measurement result, and the number is numbered one by one; then the supporting H-shaped steel 9 is hoisted to a corresponding mounting position according to a preset number by a tower crane, centering placement is carried out, spot welding positioning is carried out, then full welding fixation is carried out, and the local size deviation and the position of the supporting H-shaped steel 9 are adjusted preferably by a steel gasket setting mode.
Further, in the sixth step, the original steel pipe supporting system is dismantled, after the supporting I-shaped steel 9 is installed and the concrete reaches the preset strength, the supporting steel pipe 4 can be fixed by a steel wire rope 14 through a tower crane and lifted to the height of tensioning and slight stress of the steel wire rope 14, referring to fig. 4; and cutting the supporting steel pipe 4 along the vertical surface of the supporting bracket column 3 and the vertical surface of the supporting steel beam 5 by using oxyacetylene. The method can be used for on-site cutting operation, and preferably checks whether a gas cylinder pressure valve of oxygen acetylene is in a normal state before cutting, and performs inflammable cleaning on the site; after the support steel pipe 4 is dismantled, the support steel beam 5 is fixed by a tower crane, and then the support steel beam 5 is cut in sections, wherein the cutting process requirement can be the same as that of the steel pipe support 4; after the supporting steel pipe 4 is removed, when the supporting ox leg column 3 is cut along the upper surface of the foundation slab 2, the cutting process requirement can be the same as the cutting requirement of the supporting steel pipe 4, and after the cutting is finished, the cut of the supporting ox leg column 3 is preferably subjected to anticorrosion treatment, such as coating anticorrosion paint.
Furthermore, in the seventh step, in the subsequent construction, a template protection measure is arranged on the support-replacing steel beam 10, the template protection measure can be to cover a template on the support-replacing steel beam 10 to prevent the broken concrete from damaging the support-replacing I-steel 9, and then chiseling is carried out on the part of the support crown beam 6 which affects the construction of the outer wall structure so as to meet the requirement of the structure construction; and (4) cleaning the garbage generated by the chiseling operation, and continuing the subsequent structure construction.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A shear wall high limb guide wall conversion supporting structure comprises a transverse foundation bottom plate (2) arranged on a transverse foundation waterproof protective layer (1); the waterproof structure is characterized in that the left end of a foundation waterproof protective layer (1) is connected with a vertical supporting pile (7), a plain concrete filling layer (13) is arranged between a foundation bottom plate (2) and the supporting pile (7), the height of the plain concrete filling layer (13) is greater than that of the foundation bottom plate (2), the right side face, located above the foundation bottom plate (2), of the plain concrete filling layer (13) is connected with the left side face of a vertical shear wall guide wall (11), the right side face of the shear wall guide wall (11) is connected with the left end of a transverse support-changing steel beam (10), a vertical support-changing cow leg column (8) is connected onto the foundation bottom plate (2), and an inclined support-changing I-steel (9) is connected between the right end of the support-changing steel beam (10) and the support-changing cow leg column (8); the top of the shear wall guide wall (11) is connected with a vertical water stop steel plate (12); the upper part of the supporting pile (7) is connected with the left end of a transverse supporting steel beam (5) which is positioned above a shear wall guide wall (11) and a plain concrete filling layer (13), a foundation bottom plate (2) is connected with a vertical supporting bracket column (3) which is positioned on the right side of a supporting bracket (8), and an inclined supporting steel pipe (4) is connected between the right end of the supporting steel beam (5) and the supporting bracket column (3); the upper end of the supporting pile (7) is connected with a transverse supporting crown beam (6).
2. A construction method of the shear wall high limb guide wall conversion support structure according to claim 1, which comprises the following steps,
firstly, measuring and paying off, and determining the positions of a support changing I-shaped steel (9), a support changing cow leg column (8) and a support changing steel beam (10) through paying off measurement;
secondly, pre-burying reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10), binding the foundation slab (2) and the shear wall guide wall (11) after determining the positions of the support-replacing bracket column (8) and the support-replacing steel beam (10), and pre-burying reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10) at the positions of the support-replacing bracket column (8) and the support-replacing steel beam (10);
thirdly, pouring concrete, pouring the concrete of the shear wall guide wall (11) and the bottom plate structure, and pouring a plain concrete filling layer (13) between the shear wall guide wall (11) and the support piles (7);
fourthly, curing the concrete, and after the concrete is poured, performing curing and technical intermittence;
fifthly, mounting a support replacing system, including mounting a support replacing steel beam (10) and mounting a support replacing I-shaped steel (9); when the support-replacing steel beam (10) is installed, the support-replacing steel beam (10) is installed on the upper portion of the shear wall guide wall (11) in a welding mode through the reserved ribs of the support-replacing steel beam (10); when the support-replacing I-shaped steel (9) is installed, the support-replacing I-shaped steel (9) is processed according to the actual measurement distance between the support-replacing steel beam (10) and the pre-buried support-replacing bracket column (8), and the support-replacing I-shaped steel (9) is welded, connected and fixed;
sixthly, dismantling the original steel pipe support system, wherein the steel pipe support system comprises dismantling a support steel pipe (4), dismantling a support steel beam (5) and dismantling a support ox leg column (3); the support steel pipe (4) is disassembled by cutting the support steel pipe (4) by using a cutting tool after the support-replacing I-shaped steel (9) is installed and the concrete reaches the preset strength; the support steel beam (5) is dismantled by utilizing a cutting tool after the support steel pipe (4) is dismantled; when the supporting ox leg column (3) is dismantled, the supporting ox leg column (3) is cut and dismantled along the top surface of the foundation bottom plate (2) through a cutting tool;
and seventhly, performing subsequent construction, namely removing and chiseling the support crown beam (6) protruding from the top after the original steel pipe support system is removed, and preparing for subsequent structural construction.
3. The construction method of the shear wall high limb guide wall conversion support structure according to claim 2,
firstly, during measurement and paying-off, when the position of a cow leg pillar (8) is determined to be changed, a vertical structure in a building is avoided.
4. The construction method of the shear wall high-limb guide wall conversion supporting structure according to claim 2, characterized in that in the second step, the reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10) are embedded, when the reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10) are embedded at the positions of the support-replacing bracket column (8) and the support-replacing steel beam (10), when the reserved ribs are bound at the positions of the support-replacing bracket column (8), and the reserved ribs on the upper layer and the lower layer are respectively bound with bracket additional steel bars, and the support-replacing bracket column (8) and the bracket additional steel bars are welded and fixed.
5. The construction method of the shear wall high-limb guide wall conversion supporting structure according to claim 4, characterized in that, in the second step, the reserved ribs of the support-replacing cow leg column (8) and the support-replacing steel beam (10) are embedded in advance, shear wall additional steel bars are respectively bound on the shear wall steel bars on the inner side and the outer side of the shear wall, and the reserved ribs of the support-replacing steel beam (10) and the shear wall additional steel bars are welded and fixed.
6. The construction method of the shear wall high-limb guide wall conversion supporting structure according to claim 5, characterized in that, in the second step, the reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10) are pre-embedded, and the top surface of the steel plate of the support-replacing bracket column (8) is flush with the upper surface of the foundation slab (2).
7. The construction method of the shear wall high limb guide wall conversion supporting structure according to claim 6, characterized in that, in the second step, the foundation slab (2) and the shear wall guide wall (11) are bound, and when the reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10) are pre-embedded at the positions of the support-replacing bracket column (8) and the support-replacing steel beam (10), a reserved hole is formed in the shear wall guide wall (11), and the reserved ribs of the support-replacing bracket column (8) and the support-replacing steel beam (10) extend out of the shear wall guide wall (11) through the reserved hole.
8. The construction method of the shear wall high-limb guide wall conversion support structure according to claim 7, characterized in that in the third step, after a predetermined time elapses after the concrete of the shear wall and the bottom plate structure is poured, the side mold of the shear wall guide wall (11) is removed, and after impurities between the shear wall guide wall (11) and the support piles (7) are cleaned, the plain concrete filling layer (13) between the shear wall and the support piles (7) is poured.
9. The construction method of the shear wall high-limb guide wall conversion support structure according to claim 8, characterized in that in the fourth step, during concrete curing, after the concrete pouring is completed and curing and technical intermittence are carried out, the foundation slab (2) is subjected to watering curing, the shear wall guide wall (11) is subjected to film coating curing, and the plain concrete filling layer (13) is subjected to water soaking curing.
10. The construction method of the shear wall high-limb guide wall conversion support structure according to claim 9, characterized in that in the fifth step, during the installation of the support-changing system, when the support-changing steel beam (10) is installed, a connecting hole is firstly formed in a connecting plate of the support-changing steel beam (10), then the reserved rib of the support-changing steel beam (10) is inserted into the connecting hole, and then welding is carried out.
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| CN113463650A (en) * | 2021-06-25 | 2021-10-01 | 中铁一局集团厦门建设工程有限公司 | Foundation pit inclined support system and foundation pit inner support construction method |
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