CN110700586A - Refined construction method for formwork at near-empty part - Google Patents
Refined construction method for formwork at near-empty part Download PDFInfo
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- CN110700586A CN110700586A CN201910971285.6A CN201910971285A CN110700586A CN 110700586 A CN110700586 A CN 110700586A CN 201910971285 A CN201910971285 A CN 201910971285A CN 110700586 A CN110700586 A CN 110700586A
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- column
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- bottom clamping
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
- E04G17/0657—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts fully recoverable
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/001—Corner fastening or connecting means for forming or stiffening elements
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- Civil Engineering (AREA)
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention belongs to the technical field of construction of a temporary empty side formwork and discloses a fine construction method for a temporary empty part formwork, wherein bottom clamping bolts are embedded in the upper ends of lower-layer wall and column concrete; pouring concrete for lower-layer walls and columns; removing external screw rods of the lower wall, the column template and the upper end bottom clamping bolt; the upper wall, the inner and outer side templates of the column adjacent hollow parts and the back edge are installed; the outer side wall of the hollow part and the lower end of the column template are fastened by clamping bottom bolts; pouring concrete for upper walls and columns; and dismantling and recycling the non-embedded parts of the upper wall, the column template and the bottom clamping bolt. The invention has simple structure and convenient manufacture; the assembly and disassembly are convenient, the construction period is saved, and the work efficiency is improved; the invention can improve the engineering quality, improve the general quality problems and reduce the maintenance cost; the components can be recycled, so that the environment is protected and the energy is saved; saving labor, reducing engineering cost and improving economic benefit.
Description
Technical Field
The invention belongs to the technical field of construction of a blank side formwork, and particularly relates to a refined construction method for a blank part formwork.
Background
Currently, the closest prior art: in the construction stage of a building structure main body, the joint of the adjacent hollow parts of the upper and lower floor walls and columns often becomes the key part of template construction. At present, the problems are solved by adopting split bolts, and the split bolts are arranged at the root parts of wall and column formworks of an upper floor in construction or are pre-embedded at the upper parts of concrete walls and columns of a lower floor so as to achieve the purposes of fastening the formworks and preventing the concrete at the construction joint parts of the upper floor and the lower floor from causing common quality problems. However, in this method, the root form at the joint is often not fastened in place, which results in loose adhesion between the root form and the surface of the lower wall and column concrete structure which has been constructed and formed, and thus causes appearance quality defects such as wrong joints, slurry leakage, slag inclusion and the like of the concrete at the construction joint. The turnover materials and the labor input are directly increased, the exposed part of the split bolt needs to be manually cut off after the construction is completed, the split bolt materials cannot be recycled, and the like, so that the overall labor and material waste affects the appearance quality of the concrete, and the improvement of the comprehensive benefits of the project is not facilitated.
In summary, the problems of the prior art are as follows:
(1) in the prior art, the split bolts are adopted to cause the root templates at the joint to be not fastened in place, so that the root templates are not tightly clamped with the surfaces of the lower-layer wall and column concrete structures which are formed by construction, gaps are generated, and the appearance quality defects of staggered joints, slurry leakage, slag inclusion and the like of the concrete at the construction joint part are caused.
(2) The prior art directly increases turnover material and artificial input to the part that exposes of split bolt needs the manual work to cut off after the construction is accomplished, and the not recoverable scheduling problem of split bolt material is overall to be that the work is wasted, the material is wasted and influence concrete appearance quality again, is unfavorable for the improvement of project comprehensive benefits.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a rotatable semi-embedded type bottom clamping bolt fine construction method for a wall column near-hollow side mold.
The invention is realized in this way, a wall column near-empty side form can have enough to meet half the pre-buried type and press from both sides the bottom bolt fine construction method includes:
firstly, embedding bottom clamping bolts at the upper ends of lower-layer wall and column concrete;
step two, pouring concrete for the lower-layer wall and the lower-layer column;
step three, dismantling outer screw rods of the lower-layer wall, the column template and the upper-end bottom clamping bolt;
fourthly, installing the upper wall, the inner side template and the outer side template of the column adjacent hollow part and the back edge;
fifthly, fastening the outer side wall of the adjacent hollow part and a bottom clamping bolt at the lower end of the column template;
step six, pouring concrete on the upper wall and the upper column;
and seventhly, dismantling and recycling the upper wall, the column template and the bottom clamping bolt non-embedded part.
Further, the concrete method for embedding the bottom clamping bolts at the upper ends of the lower layer wall and the lower layer column concrete comprises the following steps:
1) before bottom clamping bolts at the upper ends of lower-layer wall and column templates are embedded, the upper ends of the installed templates are uniformly and vertically poured by 150-200 mm from the upper openings of the templates, and the thickness of the peripheral shear wall and the outer sides of the frame columns need to be considered, namely, the bottom vertical pouring from the elevation of the designed plate bottom needs to be considered, namely, 150-200 mm.
2) And marking the falling position by using chalk, taking the marked falling position as a positioning and grading elastic line before embedding the bottom clamping bolt, and drilling holes one by one at the cross line part by using an electric hammer.
3) And pre-embedding the bottom clamping bolt after positioning and drilling the bottom clamping bolt. Firstly, an L-shaped inner screw rod and a conical plug assembly are connected, and the length of a hexagonal nut sleeve screwed into the conical plug assembly by the L-shaped inner screw rod is controlled to be about one third to one half of the total length of the sleeve.
4) And (3) attaching the screwed conical plastic plug and the L-shaped inner screw rod to the inner side of the template.
5) And the outer side of the template is penetrated with an outer screw rod through a hole drilled in advance and is screwed with the conical plastic plug assembly on the inner side of the template.
6) And finally, fixing and pre-embedding the L-shaped inner screw rod, the conical plug assembly and the outer screw rod of the bottom clamping bolt in the template through hexagonal nuts outside the template.
Further, the concrete method for pouring concrete for the lower-layer wall and the lower-layer column in the second step comprises the following steps:
1) technical rechecking, special inspection and concealed acceptance work such as embedding quantity, position and fixing method of bottom clamping bolts, template splicing, fastening of a supporting system and the like are required to be carried out before concrete of lower walls and columns is poured.
2) The concrete is vibrated, and the floating slurry on the top of the wall and the column is removed and pressed and smeared, so that the compactness of the concrete and the embedding quality of bolts at the bottom of the clamp are ensured.
3) After the concrete of the lower wall and the lower column is poured, the outer screw rods of the exposed bottom clamping bolts embedded at the tops of the lower wall and the lower column are not collided as much as possible within 1-2, so that isolation looseness caused by external force is avoided, and concrete curing work is required to be performed to ensure the strength of the concrete.
Further, the concrete method for dismounting the outer screw rods of the lower-layer wall, the column template and the upper-end bottom clamping bolt in the third step comprises the following steps:
1) after concrete of the lower wall and the lower column is poured and reaches the specified strength, the formwork split screw, the horizontal and vertical back edges, the double-faced formwork and the outer screw of the bottom clamping bolt are removed according to the conventional process.
2) Because the time for removing the formwork of the wall and the column is relatively early, the outer screw rods of the bottom clamping bolts which extend outwards and are relatively long at the upper end of the formwork are removed as far as possible during formwork removal, so that the bottom clamping bolt assemblies are prevented from being damaged or deformed under the action of external force such as accidental collision and the like, and the turnover use quality is influenced.
Further, the concrete method for installing the upper wall, the column adjacent hollow part inner and outer side templates and the back edge comprises the following steps:
1) and the upper wall, the inner side template and the outer side template of the column hollow part and the back edge are all installed according to the conventional construction process.
2) It should be noted that the lengths of the outer side template and the vertical back edge of the wall and the column adjacent hollow part are 150-200 mm and 500mm longer than those of the inner side template and the vertical back edge respectively on the basis of considering the elevation of the embedded bottom clamping bolt on the lower layer wall and the column concrete (the thickness and the size of the horizontal cast-in-situ plate between floors are considered, and simultaneously the embedded bottom clamping bolt on the lower layer wall and the column concrete cannot be covered after the template is installed).
3) The external side wall, the column formwork and the vertical back edge of the adjacent hollow part are hung downwards from the construction joint of the upper floor and the lower floor respectively by a certain size to play a role in clamping the lower end formwork and the back edge of the lower end formwork after the external screw rod of the bottom-clamping bolt is installed and fastened, and finally the purposes of preventing the concrete of the construction joint of the upper floor and the lower floor from generating staggered joints and slurry leakage are achieved.
Further, the concrete method for fastening the outer side wall of the hollow part and the bottom clamping bolt at the lower end of the column template comprises the following steps:
1) after the upper wall and the column near-empty part inner and outer side templates and the back edge are fastened according to the conventional construction process, an outer screw rod is screwed on a bottom clamping bolt conical plug assembly pre-embedded in advance at the upper ends of the lower wall and the column, and a 3-shaped clamp and a hexagonal nut are sleeved on the outer screw rod.
2) 2-3 persons cooperate to place the steel pipe or the square horizontal back edge on the upper side and the lower side of the outer screw rod, a wrench is used for preliminarily screwing the screw caps, and the 3-shaped clamping arc-shaped groove is used for locking and fixing the horizontal back edge outside the vertical back edge.
3) Checking and adjusting whether the installation meets the requirements or not, finally screwing a hexagonal nut, and tightly pressing the lower ends of the outer side templates of the empty parts of the upper wall and the column against the surfaces of the lower concrete wall and the column.
Further, the concrete method for pouring concrete on the upper wall and the column in the sixth step comprises the following steps:
1) and after the outer side wall of the empty part and the lower end of the column template are fastened by the bottom clamping bolts, technical rechecking, special inspection and concealed acceptance procedures such as template splicing, support system fastening and the like are fulfilled and perfected.
2) And (3) pouring concrete of the upper wall and the upper column according to a conventional method, and paying attention to the vibrating method and the vibrating time to ensure the forming quality of the concrete.
Further, the concrete method for dismantling and recycling the non-embedded parts of the upper wall, the column template and the bottom clamping bolt comprises the following steps:
1) after the upper wall and column concretes are poured and the form removal strength is achieved, the split bolts, the bottom clamping bolts, the horizontal back edges, the vertical back edges, the inner and outer templates and the like can be sequentially removed.
2) When the bottom clamping bolt is disassembled, firstly loosening and disassembling the hexagon nut and the 3-shaped clamp; sequentially removing the horizontal back edge, the upper-layer wall, the column vertical back edge and the template, and then screwing off the outer screw rod; and finally, integrally screwing down the conical plug assemblies pre-embedded in the lower concrete wall and the lower concrete column by using an inner hexagonal nut wrench.
3) The detached combined wall column template clamping bottom bolts are sorted, concentrated and stacked after being cleaned, so that the combined wall column template clamping bottom bolts can be recycled for use next time.
The invention also aims to provide application of the wall column near-hollow side mold turnable semi-embedded type bottom clamping bolt fine construction method to the outer side of a frame column and a peripheral shear wall at the joint of an upper floor and a lower floor in a cast-in-place concrete structure in constructional engineering.
The invention also aims to provide an application of the wall column near-hollow side mold turnable semi-embedded type split bolt fine construction method in supporting and dismantling construction of the outer side mold plate of the near-hollow part on the inner side of the core tube shear wall and the outer side of the outer wall of the staircase.
In summary, the advantages and positive effects of the invention are: the bottom clamping bolt provided by the invention has the advantages of simple structure, regular shape and convenience in processing and manufacturing, can be produced in batches in manufacturers, is convenient for large-scale use in engineering, and saves the time for field manufacturing. Compared with the traditional construction of the split screw, the bottom clamping bolt is simpler and easier to assemble and disassemble, saves the time for installing a sleeve on the screw and cutting exposed reinforcing steel bars after the construction is finished, greatly reduces the time for assembling and disassembling the template, saves the construction period and improves the working efficiency.
The bottom clamping bolt can effectively fasten and tightly fit the root (lower end) of the outer side template of the upper wall and the column member at the empty part with the concrete surface of the lower wall and the column, prevent the concrete at the construction joint part of the upper floor and the lower floor from generating visual quality defects such as wrong joints, slurry leakage, honeycombs, slag inclusion and the like, ensure the molding quality of the concrete and reduce the quality maintenance cost. Except that the inner screw is permanently embedded into the concrete structure, other assembly parts can be disassembled and recycled for repeated use, the utilization rate of materials is improved, the loss of the materials is reduced, and the method corresponds to the current national call for environmental protection and energy conservation.
After the template is dismantled, the chiseling and repairing workload of the plug part embedded in the wall vertical surface is extremely small, the work of cutting exposed reinforcing steel bars at high altitude is saved, the construction progress is accelerated, the labor investment is saved, the engineering cost is reduced, and the economic benefit is improved.
Drawings
Fig. 1 is a flow chart of a refined construction method of a wall column near-hollow side mold capable of being rotated and half-embedded type bottom clamping bolts provided by the embodiment of the invention.
FIG. 2 is a schematic process principle diagram of a refined construction method of a wall column near-hollow side mold capable of being rotated and half pre-embedded type bottom clamping bolts provided by the embodiment of the invention;
in the figure: FIG. (a) is a schematic view of a turnover wall and column formwork bottom clamping bolt combination; figure (b) is a cross-sectional view of the conical plug assembly; FIG. (c) is an elevation view of the conical plug assembly; and (d) is a schematic view of the installation principle of the wall column turnover type bottom clamping bolt template at the empty part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a rotatable semi-embedded type bottom clamping bolt fine construction method for a wall column near-hollow side mold, and the invention is described in detail with reference to the attached drawings.
As shown in fig. 1, the rotatable semi-embedded type bottom clamping bolt fine construction method for the wall column near-hollow side mold provided by the embodiment of the invention comprises the following steps:
s101: embedding bottom clamping bolts at the upper ends of lower-layer wall and column concrete;
s102: pouring concrete for lower-layer walls and columns;
s103: removing external screw rods of the lower wall, the column template and the upper end bottom clamping bolt;
s104: the upper wall, the inner and outer side templates of the column adjacent hollow parts and the back edge are installed;
s105: the outer side wall of the hollow part and the lower end of the column template are fastened by clamping bottom bolts;
s106: pouring concrete for upper walls and columns;
s107: and dismantling and recycling the non-embedded parts of the upper wall, the column template and the bottom clamping bolt.
In the preferred embodiment of the present invention, the specific method for embedding the bottom-clamping bolt at the upper end of the lower wall and the column concrete in step S101 includes:
1) before bottom clamping bolts at the upper ends of lower-layer wall and column templates are embedded, the upper ends of the installed templates are uniformly and vertically poured by 150-200 mm from the upper openings of the templates, and the thickness of the peripheral shear wall and the outer sides of the frame columns need to be considered, namely, the bottom vertical pouring from the elevation of the designed plate bottom needs to be considered, namely, 150-200 mm.
2) And marking the falling position by using chalk, taking the marked falling position as a positioning and grading elastic line before embedding the bottom clamping bolt, and drilling holes one by one at the cross line part by using an electric hammer.
3) And pre-embedding the bottom clamping bolt after positioning and drilling the bottom clamping bolt. Firstly, an L-shaped inner screw rod and a conical plug assembly are connected, and the length of a hexagonal nut sleeve screwed into the conical plug assembly by the L-shaped inner screw rod is controlled to be about one third to one half of the total length of the sleeve.
4) And (3) attaching the screwed conical plastic plug and the L-shaped inner screw rod to the inner side of the template.
5) And the outer side of the template is penetrated with an outer screw rod through a hole drilled in advance and is screwed with the conical plastic plug assembly on the inner side of the template.
6) And finally, fixing and pre-embedding the L-shaped inner screw rod, the conical plug assembly and the outer screw rod of the bottom clamping bolt in the template through hexagonal nuts outside the template.
In a preferred embodiment of the present invention, the concrete method for concrete casting of the lower wall and column in step S102 includes:
1) technical rechecking, special inspection and concealed acceptance work such as embedding quantity, position and fixing method of bottom clamping bolts, template splicing, fastening of a supporting system and the like are required to be carried out before concrete of lower walls and columns is poured.
2) The concrete is vibrated, and the floating slurry on the top of the wall and the column is removed and pressed and smeared, so that the compactness of the concrete and the embedding quality of bolts at the bottom of the clamp are ensured.
3) After the concrete of the lower wall and the lower column is poured, the outer screw rods of the exposed bottom clamping bolts embedded at the tops of the lower wall and the lower column are not collided as much as possible within 1-2, so that isolation looseness caused by external force is avoided, and concrete curing work is required to be performed to ensure the strength of the concrete.
In the preferred embodiment of the present invention, the specific method for removing the external screw rods of the lower wall, the column formwork and the upper end bottom-clamping bolt in step S103 comprises:
1) after concrete of the lower wall and the lower column is poured and reaches the specified strength, the formwork split screw, the horizontal and vertical back edges, the double-faced formwork and the outer screw of the bottom clamping bolt are removed according to the conventional process.
2) Because the time for removing the formwork of the wall and the column is relatively early, the outer screw rods of the bottom clamping bolts which extend outwards and are relatively long at the upper end of the formwork are removed as far as possible during formwork removal, so that the bottom clamping bolt assemblies are prevented from being damaged or deformed under the action of external force such as accidental collision and the like, and the turnover use quality is influenced.
In the preferred embodiment of the present invention, the specific method for installing the upper wall, the column adjacent hollow portion inner and outer side formworks and the back edge in step S104 includes:
1) and the upper wall, the inner side template and the outer side template of the column hollow part and the back edge are all installed according to the conventional construction process.
2) It should be noted that the lengths of the outer side template and the vertical back edge of the wall and the column adjacent hollow part are 150-200 mm and 500mm longer than those of the inner side template and the vertical back edge respectively on the basis of considering the elevation of the embedded bottom clamping bolt on the lower layer wall and the column concrete (the thickness and the size of the horizontal cast-in-situ plate between floors are considered, and simultaneously the embedded bottom clamping bolt on the lower layer wall and the column concrete cannot be covered after the template is installed).
3) The external side wall, the column formwork and the vertical back edge of the adjacent hollow part are hung downwards from the construction joint of the upper floor and the lower floor respectively by a certain size to play a role in clamping the lower end formwork and the back edge of the lower end formwork after the external screw rod of the bottom-clamping bolt is installed and fastened, and finally the purposes of preventing the concrete of the construction joint of the upper floor and the lower floor from generating staggered joints and slurry leakage are achieved. And the outer side template and the vertical back edge at the joint of the upper wall and the column near the hollow part are installed.
In a preferred embodiment of the present invention, the concrete method for fastening the outer side wall of the adjacent empty part and the bottom clamping bolt at the lower end of the column formwork in step S105 includes:
1) after the upper wall and the column near-empty part inner and outer side templates and the back edge are fastened according to the conventional construction process, an outer screw rod is screwed on a bottom clamping bolt conical plug assembly pre-embedded in advance at the upper ends of the lower wall and the column, and a 3-shaped clamp and a hexagonal nut are sleeved on the outer screw rod.
2) 2-3 persons cooperate to place the steel pipe or the square horizontal back edge on the upper side and the lower side of the outer screw rod, a wrench is used for preliminarily screwing the screw caps, and the 3-shaped clamping arc-shaped groove is used for locking and fixing the horizontal back edge outside the vertical back edge.
3) Checking and adjusting whether the installation meets the requirements or not, finally screwing a hexagonal nut, and tightly pressing the lower ends of the outer side templates of the empty parts of the upper wall and the column against the surfaces of the lower concrete wall and the column. And (4) fastening the upper wall, the outer side wall of the column adjacent hollow part and the bottom clamping bolt at the lower end of the column template.
In a preferred embodiment of the present invention, the concrete method for concreting the upper wall and the upper column in step S106 includes:
1) and after the outer side wall of the empty part and the lower end of the column template are fastened by the bottom clamping bolts, technical rechecking, special inspection and concealed acceptance procedures such as template splicing, support system fastening and the like are fulfilled and perfected.
2) And (3) pouring concrete of the upper wall and the upper column according to a conventional method, and paying attention to the vibrating method and the vibrating time to ensure the forming quality of the concrete.
3) And (5) performing construction after the lower ends of the construction joints of the upper floor and the lower floor are fastened by using bottom clamping bolts in the concrete pouring process of the upper wall and the upper column.
In the preferred embodiment of the present invention, the specific method for detaching and recycling the non-embedded components of the upper wall, the column formwork and the bottom clamping bolt in step S107 includes:
1) after the upper wall and column concretes are poured and the form removal strength is achieved, the split bolts, the bottom clamping bolts, the horizontal back edges, the vertical back edges, the inner and outer templates and the like can be sequentially removed.
2) When the bottom clamping bolt is dismantled, firstly the hexagon nut and the 3-shaped clamp are loosened and dismounted, then the horizontal back edge, the upper wall, the vertical back edge of the column and the template are sequentially removed, then the outer screw rod is screwed down, and finally the conical plug assembly pre-embedded in the lower concrete wall and the column is integrally screwed down by using an inner hexagon nut wrench.
3) The upper wall and column template bottom clamping bolts are not embedded parts (outer screw rods, 3-shaped clamps and hexagonal nuts), and the detached combined wall and column template bottom clamping bolts are sorted, concentrated and stacked after being cleaned, so that the combined wall and column template bottom clamping bolts can be recycled for the next time.
As shown in fig. 2, the rotatable semi-embedded type bottom clamping bolt fine construction method for the wall column near-hollow side form provided by the embodiment of the invention specifically comprises the following steps:
1) during the construction of the concrete member at the near-hollow part, an L-shaped inner screw rod and a conical plug assembly in a bottom clamping bolt are pre-embedded into the concrete of a lower layer wall and a column, when the structure of the upper layer is constructed, an near-hollow part wall, an inner side template and an outer side template of the column and a back ridge are installed according to the conventional process, and the outer side wall, the column template and a vertical back ridge are hung downwards from construction joints of the upper layer and the lower layer respectively to a certain size;
2) then, the horizontal back edges are arranged on the upper side and the lower side of the external screw rod screwed on the back of the bottom clamping bolt, and are positioned and primarily fixed by utilizing the hexagonal nut and the arc-shaped groove of the 3-shaped clamp;
3) after finally screwing up hexagon nut, face that empty part outside wall, post template and vertical back of the body are stupefied and the surface of the stupefied lower floor concrete wall, post of receiving tightly, laminate to upper concrete placement has avoided upper and lower floor construction seam crossing to take place quality general problems such as wrong joint, hourglass thick liquid, when guaranteeing the quality, in the double-layered end bolt all can dismantle the non-pre-buried parts such as outer screw rod, circular cone type end cap subassembly and have enough to meet the need the use repeatedly after retrieving.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The fine construction method for the wall column openly-faced side form turnable semi-embedded type bottom clamping bolt is characterized by comprising the following steps of:
firstly, embedding bottom clamping bolts at the upper ends of lower-layer wall and column concrete;
step two, pouring concrete for the lower-layer wall and the lower-layer column;
step three, dismantling outer screw rods of the lower-layer wall, the column template and the upper-end bottom clamping bolt;
fourthly, installing the upper wall, the inner side template and the outer side template of the column adjacent hollow part and the back edge;
fifthly, fastening the outer side wall of the adjacent hollow part and a bottom clamping bolt at the lower end of the column template;
step six, pouring concrete on the upper wall and the upper column;
and seventhly, dismantling and recycling the upper wall, the column template and the bottom clamping bolt non-embedded part.
2. The method for finely constructing the rotatable semi-embedded type bottom clamping bolt of the wall column near-hollow side mold according to claim 1, wherein the method for embedding the bottom clamping bolt at the upper end of the concrete of the lower layer wall and the column in the first step specifically comprises the following steps:
1) before embedding bottom clamping bolts at the upper ends of the lower-layer wall and column templates, uniformly pouring 150-200 mm vertically from the upper opening of the template to the lower part of the upper end of the installed template by using a steel tape; pouring 150-200 mm vertically from the elevation of the designed plate bottom;
2) marking the falling position with chalk, positioning and grading the elastic line before embedding the bottom clamping bolt, and drilling holes one by one at the cross line part by using an electric hammer;
3) pre-embedding the bottom clamping bolt after positioning and drilling the bottom clamping bolt; firstly, connecting an L-shaped inner screw rod and a conical plug assembly, wherein the length of a hexagonal nut sleeve screwed into the conical plug assembly by the L-shaped inner screw rod is controlled to be one third to one half of the total length of the sleeve;
4) the screwed conical plastic plug and the L-shaped inner screw rod are attached to the inner side of the template;
5) the outer side of the template is penetrated with an outer screw rod through a hole drilled in advance and is screwed with the conical plastic plug assembly on the inner side of the template;
6) the L-shaped inner screw rod, the conical plug assembly and the outer screw rod of the bottom clamping bolt are fixed and pre-embedded in the template through the hexagonal nut on the outer side of the template.
3. The wall column near-hollow side mold turnable semi-embedded type bottom clamping bolt fine construction method as claimed in claim 1, wherein the method for pouring concrete of the lower wall and the column in the second step comprises the following steps:
1) template splicing and supporting systems are fastened before lower-layer wall and column concrete pouring;
2) removing and pressing floating slurry on the top of the wall and the column during concrete vibration;
3) and the concrete of the lower wall and the column does not collide with the external screw rod of the exposed bottom-clamping bolt embedded at the top of the wall and the column 1 to 2 days after pouring.
4. The method for finely constructing the wall column near-hollow side mold capable of being rotated by the semi-embedded type bottom clamping bolt as claimed in claim 1, wherein the method for dismantling the outer screw rods of the lower wall, the column template and the upper end bottom clamping bolt in the third step comprises the following steps:
1) after concrete of the lower-layer wall and the lower-layer column is poured and reaches the specified strength, the formwork split screw, the horizontal and vertical back edges, the double-faced formwork and the outer screw of the bottom clamping bolt are removed;
2) when the mold is disassembled, the external screw rod of the bottom clamping bolt which extends outwards and is relatively long at the upper end of the mold plate is firstly disassembled.
5. The method for the rotatable semi-embedded type fine construction of the sandwich bottom bolt of the wall column side mold facing the hollow space as claimed in claim 1, wherein the method for installing the upper wall, the column side hollow part inner and outer side templates and the back edge comprises the following steps:
1) the upper wall, the inner and outer side templates of the column adjacent hollow parts and the back edge are installed;
2) the lengths of the outer side template and the vertical back edge of the wall and the column adjacent hollow part are 150-200 mm and 500mm longer than those of the inner side template and the vertical back edge respectively on the basis of the pre-embedded elevation of the bottom clamping bolt on the lower-layer wall and the column concrete during design and manufacture;
3) the outer side wall, the column formwork and the vertical back edge of the adjacent hollow part are hung downwards from the construction joint of the upper floor and the lower floor respectively in a certain length to play a role in clamping the lower end formwork and the back edge of the lower end formwork after the outer screw rod of the bottom clamping bolt is installed and fastened.
6. The method for finely constructing the wall column near-hollow side mold capable of being rotated by the semi-embedded type clamping bottom bolt as claimed in claim 1, wherein the method for fastening the clamping bottom bolt at the lower end of the column template and the outer side wall of the near-hollow part in the fifth step comprises the following steps:
1) after the upper wall, the inner side template and the outer side template of the column adjacent hollow part and the back edge are fastened, an outer screw rod is screwed on a bottom clamping bolt conical plug assembly pre-embedded at the upper ends of the lower wall and the column, and a 3-shaped clamp and a hexagonal nut are sleeved on the outer screw rod;
2) placing the steel pipe or the wood horizontal back edge on the upper side and the lower side of the outer screw rod, preliminarily screwing the screw caps by using a spanner, and locking and fixing the horizontal back edge outside the vertical back edge by using the 3-shaped clamping arc-shaped groove;
3) and screwing the hexagonal nuts to tightly press the lower ends of the outer templates of the adjacent empty parts of the upper wall and the column to the surfaces of the lower concrete wall and the column.
7. The method for finely constructing the wall column near-hollow side mold capable of being rotated and semi-embedded type bottom clamping bolts as claimed in claim 1, wherein the sixth step of concrete pouring of the upper wall and the column comprises the following steps:
1) after the outer side wall of the empty part and the bottom clamping bolt at the lower end of the column template are fastened, the template splicing and the fastening of a supporting system are performed and perfected;
2) and (5) pouring concrete of the upper wall and the upper column.
8. The method for finely constructing the rotatable semi-embedded type bottom clamping bolt of the wall column near-hollow side mold according to claim 1, wherein the seven-step method for dismantling and recycling the upper wall, the column template and the bottom clamping bolt non-embedded part comprises the following steps:
1) after the upper wall and the column are concreted, the split bolts, the bottom clamping bolts, the horizontal back edges, the vertical back edges and the inner and outer templates are sequentially removed after the formwork removal strength is achieved;
2) when the bottom clamping bolt is disassembled, firstly loosening and disassembling the hexagon nut and the 3-shaped clamp, and then sequentially removing the horizontal back edge, the upper-layer wall, the column vertical back edge and the template; screwing off the outer screw rod, and finally screwing off the conical plug assemblies embedded in the lower concrete wall and the lower concrete column integrally by using an inner hexagonal nut wrench;
3) and cleaning the detached combined wall column template clamping bottom bolts, and then classifying and stacking the combined wall column template clamping bottom bolts.
9. The application of the rotatable semi-embedded type double-bottom bolt fine construction method of the wall column near-hollow side form of any one of claims 1 to 8 to the periphery shear wall at the joint of an upper floor and a lower floor and the outer side of a frame column in a cast-in-place concrete structure in constructional engineering.
10. The application of the wall column near-hollow side form turnable semi-embedded type sandwich bottom bolt fine construction method in supporting and dismantling construction of the outer side formwork of the near-hollow part on the inner side of the core tube shear wall and the outer side of the outer wall of the stairwell.
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| CN113235915A (en) * | 2021-05-20 | 2021-08-10 | 歌山建设集团有限公司 | Side column template reinforcing method |
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