CN115822271A - Construction method of oblique wall with large angle - Google Patents

Abstract

The invention discloses a construction method for large-angle inclined wall building, which effectively solves the problems of construction quality such as the angle of an inclined wall, the deformation of a wall body and the like, and also effectively solves the problem of high difficulty in inclined wall construction, and compared with the traditional construction method, the construction method improves the construction efficiency and has more reliable quality; the formwork system needs to be deeply arranged and stress is calculated in advance, so that the formwork system is safe and reliable and is stable in stress. The size is standardized and standardized, so that the phenomenon that an operator randomly sets the node and the node is unstable is avoided; the construction method has the advantages of strong applicability and operability, high safety and reliability, convenient construction, simple operation, easy acceptance by workers, elimination of potential safety hazards in the construction process, good implementation effect and suitability for construction of large inclined walls with the angle of more than 8 degrees in public buildings such as museum buildings, theater buildings, stadiums and the like.

Description

Construction Method of Large Angle Inclined Wall

technical field

The invention relates to the technical field of building construction, in particular to a large-angle oblique wall construction method.

Background technique

Building construction refers to the production activities in the implementation stage of engineering construction. It is the construction process of various buildings. It can also be said to be the process of turning various lines on the design drawings into physical objects at designated locations. It includes basic engineering construction. , main structure construction, roofing engineering construction, decoration engineering construction, etc., the place of construction work is called "building construction site" or "construction site".

In recent years, with the rapid development of the construction industry, there are more and more landmark buildings everywhere. In order to meet the unique architectural shape of the buildings, more and more special-shaped columns are applied to large public buildings. Although the existing large Angle oblique wall construction methods exist, but the construction efficiency of the existing technology is low, and the construction difficulty is relatively large. Compared with ordinary walls, large-angle oblique wall masonry has a large self-weight eccentricity, poor anti-overturning ability, and is prone to accidents. Quality problems such as wall cracking, poor flatness, and insufficient mortar fullness cannot meet the requirements of subsequent construction procedures such as plastering and waterproofing.

Therefore, those skilled in the art provide a large-angle oblique wall construction method to solve the problems raised in the above-mentioned background technology.

Contents of the invention

The object of the present invention is to provide a large-angle oblique wall construction method to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A large-angle oblique wall construction method, the construction method includes the following steps:

Construction planning of the formwork system; the frame body adopts steel pipe scaffolding, the vertical rod and cross bar are φ48.3mm×3.5mm, the outer diameter of the supporting roof is 36mm, the main keel is made of steel pipe, and the secondary keel is made of 40×90mm square wood (planed). The formwork adopts double-sided laminated wood plywood formwork specifications: 1830*915*15mm;

Masonry typesetting deepening design; according to the masonry typesetting, deepen the structural column spacing and waist beam position, draw the masonry typesetting layout plan and large construction sample diagram, and finally issue a list of total material consumption;

Measure the setting out and positioning; according to the construction drawings, use the theodolite to measure the upper and lower lines of the inclined wall and the inclined wall line, so as to accurately erect the wall formwork;

Set up double-sided scaffolding; due to the need to set up formwork, it is impossible to transport building materials from the inside of the building, and the outer walls are generally high. According to the construction conditions on site, a mobile scissor lift is used to transport materials such as aerated blocks and mortar, except that additional supports are required. In addition, the construction method of inclined wall masonry is basically the same as that of ordinary wall masonry, but special attention must be paid to the consistency of the mortar to ensure the fullness of the wall mortar. In order to control the late deformation and cracks of the inclined wall, two HRB400/6 steel bars are installed for every 250mm height of the anchor bars of the wall;

Formwork support (ring beam reinforcement binding and formwork support, double-sided tape pasting; ring beam and structural column formwork support); according to the released wall inclination line and control line, set up the inner support formwork according to the support plan, and the frame body Set up a pole spacing of ≤900 and a horizontal pole spacing of ≤1250. In order to ensure the lateral rigidity of the formwork, three diagonal braces are erected synchronously. The spacing of the diagonal braces is ≤900, and every third diagonal brace is fixed with expansion screws, and the outer side is erected synchronously according to the construction progress. Scaffolding to facilitate construction;

Drilling and planting reinforcement (binding of structural column reinforcement and ring beam reinforcement); in order to ensure the overall qualification rate of the inclined wall, two HRB400/6 reinforcement bars are set for every 250mm height of the masonry anchor reinforcement, and the spacing between the structural columns of the inclined wall is ≤2.0m. Column section is wall width*200, two longitudinal reinforcements HRB400/12, stirrups are CRB600H/6@200 ring beam width same as wall thickness, height is 200mm, longitudinal reinforcements are upper and lower two HRB400/12, stirrups For CRB600H/8@200. The masonry bar is planted on the original frame column, the planting bar depth is 90mm, and the structural column steel bar planting depth is 390mm;

The masonry below the ring beam is built; the block should be watered and moistened one day before the block is built, the floating dust should be washed away, and the sundries on the surface of the block should be removed before being hoisted and transported in place. When the masonry is in place, it should be far away and then close, first down and then up, first outside and then inside; when each layer starts, it should start from the corner or the positioning block; one skin should be built, one skin should be corrected, and the skin should be pulled to control the masonry Level and wall flatness. In order to ensure that the blocks do not have lateral displacement, the height of one masonry shall not exceed 1500mm, and the upper masonry shall be built at intervals of three days;

Pouring of the ring beam and the structural column under the ring beam (pouring of the ring beam and the structural column); the structural column and the ring beam formwork are fixed with tensioning screws with a distance of 500mm between the tensioning screws, and the inner and lower sides of the formwork are sealed at the contact part of the wall The pouring of the rubber strip structure column should adopt the method of pouring the upper and lower layers step by step, and take reliable vibration measures to ensure the compactness of the vibration and avoid the leakage of the mold;

Masonry above the ring beam; the upper wall is the same as that below the ring beam. After the upper and lower walls are completely built, after 14 days of curing, the bottom and top of the inclined wall are all made of C25 fine stone micro-expansion concrete leveling;

Remove the formwork (construction on the top of the wall, after the filling wall is completed and should be constructed at least 14 days later); in order to ensure that there will be no cracks in the wall after the formwork is removed, it is determined by field tests, referring to the "Construction Quality Acceptance Specification for Concrete Structure Engineering" (>2m, ≤8m) formwork demolition conditions, mortar and concrete test blocks with the same conditions shall be left on site, and the concrete structure and mortar strength shall reach more than 75% of the design strength before the formwork demolition operation can be carried out. After the formwork and frame are removed, they will be used for the next step wall construction;

Remove the frame body and repair the hole; after removing the formwork, the scaffold hole is formed, and it is sealed with C25 fine stone micro-expansion concrete. Add a 1.5-thick polymer cement waterproof coating type II within the range of 300mm.

Preferably: the frame body adopts steel pipe scaffolding, the specification of the vertical rod and cross bar is φ48.3mm×3.5mm, the outer diameter of the supporting top plate is 36mm, the main keel is made of steel pipe, the secondary keel is made of 40×90mm square wood (planed), and the formwork The specification of double-sided laminated wood plywood formwork is: 1830*915*15mm.

Preferably: in order to ensure that there will be no quality accidents such as cracks on the wall surface in the later stage, the inner and outer sides of the inclined wall are reinforced with steel wire mesh mortar surface. The thickness of the mortar is 20mm, and M20 ready-mixed cement mortar is used, and 16-gauge steel wire mesh 20mm*20mm is applied inside.

Compared with prior art, the beneficial effect of the present invention is:

1. Effectively solve the problems of construction quality such as the angle of the inclined wall and the amount of deformation of the wall, and also effectively solve the problem of difficult construction of the inclined wall. Compared with the traditional construction method, the construction efficiency is improved and the quality is more reliable;

2. The formwork system needs to be in-depth arrangement and force calculation in advance to make the formwork system safe and reliable, and the force is stable. Standardize and standardize the size of the erection, to avoid the random erection of the operators and the occurrence of unstable nodes;

3. This construction method has strong applicability and operability, high safety and reliability, convenient construction, simple operation and easy acceptance by workers. The most important thing is to eliminate potential safety hazards in the construction process, and the implementation effect is good. It is mostly suitable for museum buildings and theater buildings. Construction of large inclined walls with an angle greater than 8° in public buildings such as stadiums and stadiums.

Description of drawings

Figure 1 is a construction flow chart of the large-angle oblique wall construction method.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1, in the embodiment of the present invention, the large-angle oblique wall construction method, the construction method includes the following steps:

Construction planning of the formwork system; the frame body adopts steel pipe scaffolding, the vertical rod and cross bar are φ48.3mm×3.5mm, the outer diameter of the supporting roof is 36mm, the main keel is made of steel pipe, and the secondary keel is made of 40×90mm square wood (planed). The formwork adopts double-sided laminated wood plywood formwork specifications: 1830*915*15mm;

Masonry typesetting deepening design; according to the masonry typesetting, deepen the structural column spacing and waist beam position, draw the masonry typesetting layout plan and large construction sample diagram, and finally issue a list of total material consumption;

Measure the setting out and positioning; according to the construction drawings, use the theodolite to measure the upper and lower lines of the inclined wall and the inclined wall line, so as to accurately erect the wall formwork;

Set up double-sided scaffolding; due to the need to set up formwork, it is impossible to transport building materials from the inside of the building, and the outer walls are generally high. According to the construction conditions on site, a mobile scissor lift is used to transport materials such as aerated blocks and mortar, except that additional supports are required. In addition, the construction method of inclined wall masonry is basically the same as that of ordinary wall masonry, but special attention must be paid to the consistency of the mortar to ensure the fullness of the wall mortar. In order to control the late deformation and cracks of the inclined wall, two HRB400/6 steel bars are installed for every 250mm height of the anchor bars of the wall;

Formwork support (ring beam reinforcement binding and formwork support, double-sided tape pasting; ring beam and structural column formwork support); according to the released wall slope line and control line, the inner support formwork is erected according to the support plan, and the frame body is erected. Set up a pole spacing of ≤900 and a horizontal pole spacing of ≤1250. In order to ensure the lateral stiffness of the formwork, three diagonal braces are erected synchronously. The spacing of the diagonal braces is ≤900, and every third diagonal brace is fixed with expansion screws, and the outer side is erected synchronously according to the construction progress. Scaffolding to facilitate construction;

Drilling and planting reinforcement (binding of structural column reinforcement and ring beam reinforcement); in order to ensure the overall qualification rate of the inclined wall, two HRB400/6 reinforcement bars are set for every 250mm height of the masonry anchor reinforcement, and the spacing between the structural columns of the inclined wall is ≤2.0m. Column section is wall width*200, two longitudinal reinforcements HRB400/12, stirrups are CRB600H/6@200 ring beam width same as wall thickness, height is 200mm, longitudinal reinforcements are upper and lower two HRB400/12, stirrups For CRB600H/8@200. The masonry bar is planted on the original frame column, the planting bar depth is 90mm, and the structural column steel bar planting depth is 390mm;

Masonry below the ring beam; the block should be watered and moistened the day before the masonry is built, the floating dust should be washed away, and the sundries on the surface of the block should be removed before being hoisted and transported in place. The masonry should be placed far and then close, first down and then up, first outside and then inside; at the beginning of each layer, it should start from the corner or the positioning block; one skin should be built, one skin should be corrected, and the skin should be pulled to control the masonry Level and wall flatness. In order to ensure that the blocks do not have lateral displacement, the height of one masonry shall not exceed 1500mm, and the upper masonry shall be built at intervals of three days;

Pouring of the ring beam and the structural column under the ring beam (pouring of the ring beam and the structural column); the structural column and the ring beam formwork are fixed with tensioning screws with a distance of 500mm between the tensioning screws, and the inner and lower sides of the formwork are sealed at the contact part of the wall The pouring of the rubber strip structure column should adopt the method of pouring the upper and lower layers step by step, and take reliable vibration measures to ensure the compactness of the vibration and avoid the leakage of the mold;

Masonry above the ring beam; the upper wall is the same as that below the ring beam. After the upper and lower walls are completely built, after 14 days of curing, the bottom and top of the inclined wall are all made of C25 fine stone micro-expansion concrete leveling;

Remove the formwork (construction on the top of the wall, after the filling wall is completed and should be constructed at least 14 days later); in order to ensure that there will be no cracks in the wall after the formwork is removed, it is determined by field tests, referring to the "Construction Quality Acceptance Specification for Concrete Structure Engineering" (>2m, ≤8m) formwork demolition conditions, mortar and concrete test blocks with the same conditions shall be left on site, and the concrete structure and mortar strength shall reach more than 75% of the design strength before the formwork demolition operation can be carried out. After the formwork and frame are removed, they will be used for the next step wall construction;

Remove the frame body and repair the hole; after removing the formwork, the scaffold hole is formed, and it is sealed with C25 fine stone micro-expansion concrete. Add a 1.5-thick polymer cement waterproof coating type II within the range of 300mm.

The frame body adopts steel pipe scaffolding, the specification of the vertical rod and cross bar is φ48.3mm×3.5mm, the outer diameter of the supporting top plate is 36mm, the main keel is made of steel pipe, the secondary keel is made of 40×90mm square wood (planed), and the formwork is double-sided The specifications of the laminated wood plywood formwork are: 1830*915*15mm.

In order to ensure that there will be no quality accidents such as cracks on the wall in the later stage, the inner and outer sides of the inclined wall are reinforced with steel mesh mortar surface. The thickness of the mortar is 20mm, and M20 ready-mixed cement mortar is used, and 16-gauge steel wire mesh 20mm*20mm is applied inside.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (3)

1. The construction method for the large-angle inclined wall building is characterized by comprising the following steps:

constructing a formwork system plan; the support body adopts steel pipe scaffold, and the pole setting horizontal pole specification is phi 48.3mm 3.5mm, and the roof external diameter of supporting is 36mm, and the main joist adopts the steel pipe, and the secondary joist adopts 40 x 90mm square timber (cross the plane), and the template adopts two-sided tectorial membrane wood plywood template specification to be: 1830 x 915 x 15mm;

deeply designing masonry typesetting; according to masonry typesetting, deepening the space between constructional columns and the position of a waist beam, drawing a masonry typesetting plane layout drawing and a construction large sample drawing, and finally issuing a total material usage list;

measuring, paying off and positioning; according to a construction drawing, measuring the upper and lower sidelines and the inclined wall body line of the inclined wall by using a theodolite so as to accurately set up a wall body template;

erecting a scaffold on two sides; because a formwork needs to be built, building materials cannot be transported from the inner side of a building, the outer wall body is generally higher, materials such as aerated blocks, mortar and the like are transported by adopting a movable shear fork lifter according to site construction conditions, and the construction method of the inclined wall is basically the same as the common wall building method except that a support needs to be additionally built, but special attention needs to be paid to mortar consistency to ensure mortar fullness of the wall body. In order to control the later deformation and crack generation of the inclined wall, two HRB400/6 steel bars are arranged at each 250mm height of the wall body anchoring and pulling rib;

erecting formworks (binding ring beam steel bars, erecting formworks, sticking double-sided tapes, erecting ring beams and constructional column formworks); according to the released wall body inclined line and control line, an inner side support template is erected according to a support scheme, the space between vertical rods erected on a frame body is less than or equal to 900, the space between horizontal rods is less than or equal to 1250, three inclined struts are erected synchronously for ensuring the lateral rigidity of the template, the space between the inclined struts is less than or equal to 900, every three inclined struts are fixed by expansion screws, and an outer side scaffold is erected synchronously according to the construction progress so as to facilitate construction;

drilling and planting reinforcements (binding constructional column reinforcements and binding ring beam reinforcements); in order to ensure the integral qualification rate of the inclined wall, the masonry anchor lacing wires are provided with two HRB400/6 reinforcing steel bars per 250mm of height, the space between the constructional columns of the inclined wall is less than or equal to 2.0m, the section of each column is wall width x 200, two HRB400/12 longitudinal bars are provided, the stirrups are CRB600H/6@200 ring beam width and wall thickness, the height is 200mm, the longitudinal bars are upper and lower HRB400/12 respectively, and the stirrups are CRB600H/8@200. The masonry is embedded with steel bars on the original frame column, the embedded steel bar depth is 90mm, and the steel bar embedded depth of the constructional column is 390mm;

building masonry below the ring beam; the building blocks are watered and moistened one day before being built, floating dust is removed, and the building blocks can be hoisted and transported in place after sundries on the surfaces of the building blocks are removed. The masonry should be in place first far and then near, first down and then up, and first outside and then inside; when each layer starts, the method starts from a corner or a positioning building block; one skin is built and one skin is corrected, and the skin stay wire controls the elevation of the masonry and the flatness of the wall surface. In order to ensure that the building blocks do not generate lateral displacement, the building height at one time is not more than 1500mm, and the upper building body is built at intervals of three days;

pouring the ring beam and the ring beam lower constructional column (pouring the ring beam and the constructional column); the constructional column and the ring beam template are fixed by using split screws, the space between the split screws is 500mm, an upper layer and a lower layer are poured step by adhering sealing rubber strips to the contact parts of the wall body at the lower side in the template, and reliable vibration measures are adopted to ensure that vibration is compact and avoid leakage of slurry from a mould;

building masonry above the ring beam; the building of the upper wall body is consistent with that below the ring beam, after the upper wall body and the lower wall body are completely built, the upper wall body and the lower wall body are maintained for 14 days, and the bottom and the top of the inclined wall are completely leveled by adopting C25 fine stone micro-expansive plain concrete;

removing the template (constructing the wall top, constructing after the infilled wall is built and at least 14 days later); in order to ensure that the wall does not crack after the form removal, the field test determines that mortar and concrete are kept in the same condition test block on the spot according to the form removal condition of a medium plate (more than 2m and less than or equal to 8 m) in the acceptance standard of construction quality of concrete structure engineering, the form removal operation can be carried out when the strength of the concrete structure and the mortar reaches over 75 percent of the design strength, and the form and the frame body are used for the next wall construction after being removed;

dismantling the frame body and repairing the hole; and (3) removing the template to form a scaffold hole, plugging by adopting C25 fine stone micro-expansive plain concrete, removing excessive concrete protruding from the surface after the template is removed, leveling by adopting M25 premixed cement mortar, and adding 1.5-thick polymer cement waterproof coating II within the range of 300mm around the later-stage hole.

2. The large-angle inclined wall building construction method according to claim 1, wherein the frame body is a steel pipe scaffold, the size of a cross rod of the vertical rod is phi 48.3mm x 3.5mm, the outer diameter of a supporting top plate is 36mm, the main keel is a steel pipe, the secondary keel is a 40 x 90mm square wood (over-planing), and the template is a double-faced film-coated wood plywood template: 1830 × 915 × 15mm.

3. The construction method for the large-angle inclined masonry wall according to claim 1, wherein the inner surface and the outer surface of the inclined wall are reinforced by steel wire mesh mortar surface layers in order to ensure that the wall surface does not crack in the later period. The thickness of the mortar is 20mm, M20 premixed cement mortar is adopted, and 16 # steel wire meshes are coated inside the mortar at 20mm-20mm.

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