CN113323131A

CN113323131A - Assembly type construction method for archaized building

Info

Publication number: CN113323131A
Application number: CN202110609402.1A
Authority: CN
Inventors: 段文川; 伍任雄; 庞道济; 刘远良; 余杰
Original assignee: Chongqing Construction Engineering Group Co Ltd; Chongqing Construction Residential Engineering Co Ltd
Current assignee: Chongqing Construction Engineering Group Co Ltd; Chongqing Construction Residential Engineering Co Ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-08-31

Abstract

The invention provides an assembly type construction method for an antique building, which comprises the steps of construction lofting, mold manufacturing and installation, wherein concrete rafters are divided into standard rafters and wing angle rafters for prefabrication; processing and installing reinforcing steel bars, after the reinforcing steel bars are installed and combined with roof plate reinforcing steel bars, installing hooks on site, and hooking at the cross-bridged part of the upper bidirectional net reinforcing steel bars; vibrating and maintaining the rafter concrete, and replacing the common concrete prefabricated rafter with ceramsite concrete; and (4) disassembling the formwork, checking and accepting, classifying and numbering the prefabricated parts, and installing and constructing the prefabricated rafters and the roof boarding. The invention combines the construction experience of the archaized building, summarizes the construction method of decomposing, prefabricating and orderly installing the cast-in-place concrete rafters and the roof boarding, finally forms the construction process of 'reserving the tongue-and-groove at the top of the rafters, then arranging the roof boarding and then casting the roof in place', particularly simplifies the complex process flow of the wing corner part, fully expresses various curves and curved surfaces in the archaized building, shortens the construction period and saves the construction cost.

Description

Assembly type construction method for archaized building

Technical Field

The invention relates to the technical field of roof construction of an antique building, in particular to an assembly type construction method for the antique building.

Background

The archaized building is a building which is specially used for imitating and replacing ancient buildings, traditional religious temples, traditional landscapes, historical buildings and ancient village groups and restoring historical landscape general.

Ancient buildings in China have important status in the world building history, form a unique building system and have attractive artistic charm.

The rafters and the roof boarding in the historic building are constructed by adopting tenon-and-mortise and lamination of wood materials, serve as important component members in a roof system, directly transmit top load to purlins and beams, and play a transition role among roofs, beams and columns. With the continuous development and evolution of the current building materials and construction technologies. The concrete rafters in modern antique buildings not only keep the original use function, but also play an important decorative role.

The roof rafters and the roof boarding are constructed by cast-in-place concrete in the prior art, and the method has the advantages of high formwork supporting difficulty, difficult steel bar binding, complex working procedures, long construction period and high construction cost, and the problems are more prominent at wing corner positions.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an assembly type construction method for an antique building, which is used for solving the problems of high difficulty in formwork support of a wing corner part, difficulty in binding reinforcing steel bars, complex working procedures, long construction period and high construction cost.

According to an embodiment of the present invention, a fabricated construction method for an archaized building includes:

construction lofting, namely manufacturing an actual model according to the proportion of 1: 1 on a construction site for reference of construction lofting;

calculating the size, accurately calculating the type, the number and the size of the rafters, and developing a processing plan list of the specification, the number and the length of each rafter;

manufacturing and installing a mould, namely dividing the concrete rafters into a standard rafter and a wing angle rafter for prefabrication;

processing and installing reinforcing steel bars, after the reinforcing steel bars are installed and combined with roof plate reinforcing steel bars, installing hooks on site, and hooking at the cross-bridged part of the upper bidirectional net reinforcing steel bars;

vibrating and maintaining the rafter concrete, and replacing the common concrete prefabricated rafter with ceramsite concrete;

disassembling the mold, checking and accepting and classifying and numbering the prefabricated parts;

and (5) installing and constructing the prefabricated rafters and the roof boarding.

Compared with the prior art, the invention has the beneficial effects that:

the technology adopts the prefabrication construction, the line production is realized, the efficiency is higher, the construction period is shortened, the investment of construction facility materials is saved compared with other construction schemes, and the requirement on wood is reduced; after the effect of the fair-faced concrete is achieved, the plastering is not needed, and the cement consumption is reduced; the light ceramsite concrete is applied, so that the self weight of the structure is reduced; the environment-friendly and energy-saving effect is obvious:

1. the archaize building roof boarding and the roof are cast in situ together, so that the installation of a roof boarding bottom die is reduced, the cost is saved, and the construction speed is improved.

2. The rafters, particularly the wing corner parts, are prefabricated in advance and are constructed in combination with cast-in-place, so that a complex high formwork system is simplified, the safety production is ensured, the efficiency is improved, and the construction period is shortened.

3. The position of the rafter is reserved with a tongue-and-groove on the purlin in advance and extends into the purlin by 2cm, the rafter can be quickly and accurately installed in place during hoisting, and is cast in situ with the purlin, so that stability is guaranteed.

The formation of the construction technology of the pseudo-classic architecture roof cast-in-place and assembly combination prolongs the service life of the rafters, reduces the maintenance frequency, is beneficial to the enhancement of the technical level and the competitive strength of construction enterprises, adds a practical and magnificent culture carrier for the nation and promotes the exchange of Chinese and foreign culture for inheritance and propagation of national culture.

Drawings

FIG. 1 is a schematic flow chart of an embodiment of the present invention.

Fig. 2 is a schematic view of the scaffolding structure of the cornice portion according to the embodiment of the present invention.

Fig. 3 is a schematic structural view of a wing corner portion according to an embodiment of the present invention.

Fig. 4 is a schematic view of a positioning control structure for wing angle tilting curve according to an embodiment of the present invention.

In the above drawings: 1. prefabricating a groove rafter; 2. pouring an eave purline beam in situ; 3. square wood; 4. a cross bar; 5. a double fastener; 6. a roof is cast in place; 7. prefabricating an eave rafter; 8. a template; 9. a rafter head diagonal rod; 10. casting a large connecting eave in situ; 11. erecting a rod; 12. a longitudinal bar; 13. a scissor support; 14. wing angle rafters; 15. wing angle raising curve template; 16. and (4) standard rafters.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

As shown in fig. 1 to 4, an embodiment of the present invention provides a fabricated construction method for an antique building, including:

calculating the size, accurately calculating the type, the number and the size of the rafters, and developing a processing plan list of the specifications, the number, the length and the like of each rafter;

Further, the steps of manufacturing and installing the mold are as follows:

manufacturing a standard rafter mold, wherein a rafter head baffle and side molds at two sides are required to be nailed squarely and firmly, a rafter tail baffle is provided with an opening for a reinforcing steel bar to pass through, and the rafter tail baffle is arranged according to a lofting size;

manufacturing wing angle rafter molds, and manufacturing wing angle rafter templates in pairs so as to ensure that the sizes of the wing angle rafters at the same positions in different directions at the wing angle positions are consistent;

manufacturing a rafter mold, reserving a 1.5cm rabbet at the top of the rafter for laying a roof boarding, wherein the rafter and the roof boarding form a bottom mold of the roof cast-in-place board, the rabbet at the top of the rafter is formed and controlled by square battens, and the square battens are firm, flat and straight;

the head of the eave rafter and the flying rafter is reserved with 4cm without a rabbet for eave.

Further, the steps of vibration and maintenance of the rafter concrete are as follows:

stirring the ceramsite concrete for 3-5 minutes to ensure good workability;

the construction of prefabricating the concrete rafters is carried out on a solid, smooth and flat site, and the laying and leveling of the bottom die are carried out to prevent the warping phenomenon;

when rafter concrete is poured, two ends are sufficiently vibrated, so that the uniformity and the compactness of the concrete are ensured;

the vibration and maintenance of the head and the tail of the wing angle rafter are enhanced, and the cracks are avoided

Wherein, to prefabricated rafter and the step of the roof boarding construction of installing do: the prefabricated rafters comprise standard rafters and wing angle rafters;

installing a prefabricated standard rafter:

erecting a construction frame body, installing scaffolds for cornices, wherein vertical rods are longitudinally spaced by 90cm, the transverse spacing is cornice plus 50cm, the height of an inner vertical rod below a rafter is the height of the rafter, the height of an outer vertical rod is the height of the cornice plus 1.8m, double fasteners are arranged at the joints of the vertical rods and a cross rod, and a cross brace is arranged to increase the overall strength;

hoisting rafters, wherein the rafters larger than 2m are easy to break at the middle part due to the large hoisting weight during installation, and the structural steel bars are additionally arranged at the position, so that the hanging bars are required to be upward during hoisting, and two points at two ends are hoisted;

controlling the elevation of the cornice, flatly paving the support and the bottom plate according to an elevation control point, inspecting by using a rafter sample plate, and taking the flat and tight bottom plate under a rafter head as a standard;

installing a standard rafter and positioning the standard rafter, processing a purlin beam template at the root of the rafter, marking a position line of the rafter on the purlin beam template by a steel tape according to the diameter of the rafter according to a design drawing, digging off the rafter part according to the line, leaving a tooth-shaped part, wherein the tooth opening has accurate size and uniform distance, and nailing, wedging and fixing the side surface of a bayonet template to ensure that concrete does not flow out and run out of the template;

when the template is installed, the corresponding tooth mouths of the ridge purlin template and the golden purlin and eaves purlin templates are required to be aligned and corrected in intervals through the line of the gap;

after the eave sealing plate is installed, rafters are installed according to the positions of the rabbet on the bayonet template, and the rafters are hung in the order of brain rafters, groove rafters and eave rafters;

cutting and installing a roof boarding:

replacing a cement mortar board with a prefabricated cement fiber pressure board with the thickness of 1.5cm, and arranging a rabbet with the thickness of 1.5cm on an upper opening of the prefabricated rafter for laying a roof boarding;

the roof boarding at the standard rafter position is calculated according to a drawing before installation, cut and installed on site, the bonding material is cement mortar with the ratio of 1: 2, and gaps are filled with the mortar after installation;

the gate baffle is used for the position of the fly rafters and the neutral position of the fly rafters, the concrete is prevented from leaking when the concrete is poured, and the gate baffle in the heavy eave structure is also constructed by a cement fiber pressure plate with the thickness of 1.5 cm.

The step of installing the wing angle rafters is as follows:

plane positioning and paying off, namely paying off a plane axis and a 45-degree axis of a wing angle part on the ground, paying off a wing angle rafter plane projection line on the basis of the existing axis, hanging the axis on a construction layer when a template is erected, and checking the axis of the wing angle part;

controlling the warping and the warping-out, determining a starting point and a finishing point of the warping-out point, equally dividing the horizontal length of the warping-out point into four equal parts, calculating the heights of three middle points according to 1/16, 4/16 and 8/16 of the length of the warping-out point, and obtaining a warping-out curve by connecting arcs formed by the starting point, the finishing point and the three middle points;

after the warp-out intermediate point is calculated, placing the pcv pipe along the calculated 5 control points on site, drawing a warp curve along the edge line of the pvc pipe, and manufacturing two wing angle shaping sleeve plates for warp lifting and warp-out construction during construction.

Next, the step of installing the wing angle rafters is as follows:

fixing the raising curve plate on the end of the support, and simultaneously, using a large head wedge to lift the rafter at the bottom of the rafter, so that the lower part of the rafter is flat and tight to jack the raising curve plate, and then raising is finished;

controlling the radian, and finally checking the upwarp and the upwarp by using a wing angle shaping sleeve plate;

because the cross section of the wing angle rafter prefabricated by concrete is square, and the side of the wing angle rafter close to the angle beam is raised greatly, the big end of the big-head wedge is better towards the root of the angle beam or the rafter. The root of one wing angle rafter closest to the standard rafter is formed into a wedge shape on one side and is parallel to the standard rafter on the other side, and the rake is smaller;

anchoring reserved steel bars at the rafter tail of the wing angle into the beam, welding the reserved steel bars with beam ribs, and inserting the reserved steel bars at the upper part into the roof panel;

the stopper of the irregular rafter at the root part of the prefabricated wing angle rafter is sealed by adopting foamed polyurethane or foam so as to ensure the stability and the demolding quality of the wing angle rafter during roof concrete pouring.

The detailed working process of the embodiment is as follows:

firstly, a special construction lofting scheme is compiled, data which cannot be directly read from a drawing are analyzed and researched, and an actual model is manufactured on a construction site according to the proportion of 1: 1 for reference of construction lofting.

Accurately calculating the type, the number and the size of the rafters, and developing a processing plan list of the specifications, the number, the length and the like of each rafter. The method is characterized in that the standard rafter length can be directly obtained from the drawing in general.

Manufacturing and installing a die:

the concrete rafters are divided into standard rafters and wing angle rafters for prefabricating, and the template is manufactured according to the calculated rafter size. In order to ensure the effect of cleaning water after mold stripping, mirror surface plywood or a steel template is selected. The required amount of the standard rafters is large, and 20-30 sets of moulds can be prefabricated for turnover.

When the standard rafter mould is manufactured, a rafter head baffle and two side moulds are required to be nailed squarely and firmly. The opening of the rafter tail baffle is convenient for the steel bar to pass through, and the width of the opening is preferably not to leak the slurry; the rafter tail baffle sets up certain inclination, needs accord with the lofting size.

The manufacturing time of the wing angle rafter mould is different. The wing angle rafters are generally in the singular number, and the rafters are large in head and small in tail when the die is manufactured, so that the rafters are in the wedge shape. The wing angle rafter templates are preferably manufactured in pairs so as to ensure that the wing angle rafters at the same position in different directions at the wing angle position have the same size.

When the rafter mould is manufactured, a 1.5cm rabbet is reserved at the top of the rafter for laying a roof boarding, and the rafter and the roof boarding form a bottom mould of the roof cast-in-place board. The top rabbet of the rafter is formed and controlled by square battens, and the square battens are firm, flat and straight.

The head of the eave rafter and the flying rafter is kept about 4cm without a rabbet, and the eave rafter and the flying rafter are externally used for eave.

The two sides of the die are reinforced by channel steel, turnbuckles are fastened, and diagonal length inspection is performed after fastening, so that rhombus is prevented, and the die plate cannot run.

The mold plates are coated with a release agent, preferably an aqueous release agent, which is thin and uniform.

Processing and installing steel bars:

the steel bar should be qualified after leaving factory and can be used after being retested. The hanging ribs and the main ribs must reserve anchoring lengths according to the design requirements of drawings. The stirrups and the main reinforcements are connected through spot welding, and the integrity of the prefabricated reinforcement cage is improved.

When the rafters are hung, the reserved anchoring steel bars of the rafters need to extend into the roof board and the purlin beams. Processing a hook when prefabricating a rafter hanging rib with the diameter more than phi 8; for rafters with the diameter smaller than phi 8 and below, hooks can not be machined during prefabrication. After the rafters are installed, the hooks are installed on site after the rafters are combined with the roof plate ribs. Preferably, the hooks are hooked at the upper two-way mesh rib cross-lapping position. Is beneficial to the integral combination of the rafters.

The wing angle rafter tail size is narrower, is generally 6-8cm, and the reinforcing bar mounted position needs the accuracy, guarantees the thickness of protective layer.

Vibrating and curing the rafter concrete:

ceramsite concrete is adopted to replace common concrete prefabricated rafters. The raw materials and the construction mixing proportion of the ceramsite concrete are strictly controlled so as to ensure the stable quality of the formed member.

Compared with common concrete, the ceramsite concrete is easier to separate, and the stirring time is controlled to be 3-5 minutes to ensure good workability.

When the concrete rafter is prefabricated, the concrete rafter needs to be laid on a solid, smooth and flat place, and the bottom die needs to be leveled to prevent warping.

When rafter concrete is poured, a micro vibrating rod is preferably used. Both ends should be sufficiently vibrated to ensure the uniformity and compactness of the concrete. The concrete vibration time should be short not suitable long, to the rafter that can't use the vibrting spear to vibrate, generally adopt the reinforcing bar manual work to vibrate and solve the problem.

The wing angle rafters are large in head and small in tail, the diameter of the rafters is about 6-8cm, vibration and maintenance of the position are enhanced, and cracks are avoided.

After concrete is poured, the concrete is covered and maintained by a plastic film (covered with felt during winter construction), the rafters need to be watered and moistened every day, and particularly, attention needs to be paid to summer construction to avoid rafter cracks.

Removing the mold and checking:

when the temperature is above 10 ℃, the template can be removed within 24 hours, and the removal of the template needs to pay attention to the edge part.

And (4) dismantling the die, cleaning and maintaining the die, and brushing a release agent for secondary standby.

And strictly checking the appearance quality of the prefabricated rafters, meeting the requirements of quality acceptance standards, and timely processing the prefabricated rafters if defects exist so as to ensure the good appearance of the rafters.

Damaged rafters must not be repaired for reuse and must be destroyed on site. In order to avoid an insufficient number of rafters, a certain number may be added during prefabrication.

Classifying and numbering the prefabricated parts:

the prefabricated rafters are classified and stacked at specified positions, and various rafters are sequentially coded according to the positions, particularly the wing angle rafters are carefully numbered.

And (4) laying square wood under the prefabricated rafter stack, and stacking the wood neatly without exceeding 3 layers.

The installation and construction of the prefabricated rafters and the roof boarding:

and (4) releasing a plane position line of the standard rafter on the ground, and rechecking the accuracy of the plane position line, wherein the error is not more than 2 mm. The cornice axis adopts the suspension wire to upwards transmit, and 50 marking lines of each layer turn over all should have the special messenger to be responsible for, have laid the basis for the formation of roofing cornice.

Installation of a standard rafter:

the scaffold is designed according to the characteristics of the engineering site, the construction of a main body framework is matched, and the safety and reliability of cornice and wing corner parts are considered. Used scaffold frame of installation eaves mouth, pole setting are generally according to longitudinal separation 90cm, and horizontal interval adds 50cm (the walking width of one person) for the eave, and the pole setting height is flat under the rafter in rafter, and outer pole setting height adds 1.8m (dense mesh height) for the eaves mouth elevation. The joint of the vertical rod and the cross rod is provided with a double fastener. And the cross brace is arranged, so that the overall strength is improved.

Hoisting rafters:

the prefabricated rafter stack is hung and put lightly to ensure the complete rafter angle. The rafters larger than 2m are easy to break at the middle part due to large hoisting weight during installation, so that a plurality of construction steel bars are arranged at the position. During hoisting, the hanging ribs are required to be upward, and two points at two ends are hoisted.

As shown in fig. 2, cornice elevation control:

in order to ensure that the cornice is level, the elevation of the bottom plate of the supporting rafters must be accurate, and the error does not exceed 2 mm. And (4) flatly paving the support and the bottom plate according to the elevation control point, inspecting by using a rafter sample plate, and taking the flat top and bottom plate below a rafter head as a standard.

Standard rafter installation in place

When a purlin beam template at the root of a rafter is machined, according to a design drawing, firstly, according to the diameter of the rafter, a steel tape is used for calibrating the position line of the rafter on the purlin beam template, the rafter part (a bayonet template) is dug off according to the line, and a dentiform part (a rafter stop) is left, wherein the dentiform part has the advantages that the size of a tooth opening (the rafter diameter) is accurate, the distance between the teeth is uniform (the clear distance of the rafter stop), the dimensional error of the clear opening of the rafter stop is controlled within 2mm, and the side surface of the bayonet template is nailed and fixed by wood; when the template is installed, the corresponding tooth mouths of the ridge purlin template, the gold purlin template and the eaves purlin template are required to be aligned, and the correction can be conducted in intervals through the line of the dragon mouth.

After the eave sealing plate is installed, the rafters are installed according to the positions of the grooves and the tongues on the bayonet template. The hanging rafters are brain rafters, trough rafters and eave rafters (the heavy eave structure has a flying rafter).

In order to ensure that the three rafters are straight and straight, a special square ruler can be used for checking. As long as the bayonet template is accurately prepared and installed, the brain rafters and the groove rafters can basically meet the requirement of being perpendicular to the purlines and can be squared by a square ruler; the eaves rafter can pass through the groove rafter, lean on straight down with the ruler. In order to ensure the accuracy of the eave of the rafter, a through-length baffle is arranged on the bottom plate to limit the position of the rafter head and prevent the rafter head from sliding downwards. All rafters tightly push against the baffle plate, and the eave is neat and consistent. After the eaves rafter is installed, the position of the eaves mouth flying rafter is determined, the flying rafter is placed according to a line, a positioning clamping plate is arranged at the head of the flying rafter to limit left and right deviation, and then a straight ruler is used for straightening, so that the flying rafter and the eaves rafter are straight and parallel to one line. When the three rafters are installed, the whole body extends into the purlin beam by 1-2 cm.

The three rafters are anchored with the purlin beam from the side surface and are connected with the purlin beam stirrups and the main reinforcements in a spot welding mode, and the hanging ribs are reserved on the upper portion of the three rafters and are anchored into the roof panel. The rafter tail generally adopts phi 8 through-length reinforcing steel bars to carry out welding positioning connection.

As shown in fig. 3 and 4, the installation of the wing angle rafters:

wing angle rafter location unwrapping wire: and (3) plane positioning and paying off, namely paying off the plane axis and 45-degree axis of the wing angle part on the ground, paying off the plane projection line of the wing angle rafter on the basis of the existing axis, hanging the axis on a construction layer when a template is erected, and checking the axis of the wing angle part. The plane axis of the wing angle can only control the direction and the specific position of the rafter. The final formation of the wing angle is also controlled by the camber and camber lines.

Controlling warping and warping out: the wing angle rafter has the rise in the horizontal direction and rises and warp in the vertical direction simultaneously, and at the root that is close to standard rafter one side, the rake is less, and the tip that is close to the angle beam limit is great, and for each rafter, there is not accurate rise in the drawing and rises the numerical value, and the installation of wing angle rafter is great than standard rafter and is regarded as the degree of difficulty, and the partial rise of wing angle, rise is the key that we controlled.

The calculation of the curve data of the generated warp is carried out by adopting an empirical formula, firstly determining a starting point and an end point of the warp generating point, equally dividing the horizontal length of the starting point and the end point into four equal parts, then calculating the heights of three points in the middle according to 1/16, 4/16 and 8/16 of the length of the generated warp, and obtaining the warp generating curve by connecting arcs formed by the starting point, the end point and the three points in the middle. After the warp-out intermediate point is calculated, placing the pcv pipe along the calculated 5 control points on the site, and then drawing a warp curve along the side line of the pvc pipe. The raising method is similar to the raising method, and two wing angle shaping sleeve plates are manufactured for raising and raising construction during construction.

The method is characterized in that a prefabricated wing angle rafter warping curve plate is manufactured in engineering, a special reinforcing steel bar support for warping and positioning can also be manufactured, the warping curve plate is fixed on the end of the support during construction, a large head wedge is used for padding the rafter at the bottom of the rafter, the lower part of the rafter is flat and tightly jacked to warp the warping curve plate, the warping is finished, the radian is controlled, and finally a wing angle shaping sleeve plate is used for checking the warping and the warping-out. It should be noted that the big head wedge has a big head towards the root of the corner beam or rafter, because the cross section of the concrete prefabricated wing corner rafter is square, and the side of the wing corner rafter close to the corner beam is raised greatly. The root of one wing angle rafter closest to the standard rafter is formed into a wedge shape on one side and is parallel to the standard rafter on the other side, and the rake is smaller. In addition, the wing angle is out of the way, and the out-of-way degree of each wing angle rafter is different, so that the rafter position is different, and the fly rafters are included, so that repeated adjustment is needed. And the wing angle rafter tail reserved steel bars are anchored into the beam and welded with the beam rib, the upper reserved steel bars are inserted into the roof panel, and the anchoring length meets the design requirement. And welding and fixing the raised flying rafter reinforcing steel bars like flying rafters. The stopper of the irregular rafter at the root part of the prefabricated wing angle rafter is sealed by adopting foamed polyurethane or foam so as to ensure the stability and the demolding quality of the wing angle rafter during roof concrete pouring.

The main reason is that the top of the wing angle groove rafter is enlarged (all the wing angle groove rafters are gathered into one point), the head of the wing angle groove rafter is only 4-6cm, the section is small, prefabrication is difficult, and engineering generally adopts a false rafter scheme. The PVC partition strip can be used for construction, the partition strip is buckled on the bottom die, the partition strip is also immediately left in concrete after the concrete is poured, the cast-in-place concrete plate is divided by the groove of the partition strip, the false appearance of rafters is given to people, and the effect is good. Or the wood strips are adopted for placement, and the wood strips are taken out after the concrete is poured.

Cutting and installing the roof boarding on site: in the archaized building, a prefabricated cement fiber pressure plate with the thickness of 1.5cm is adopted to replace a cement mortar board, a rabbet with the thickness of 1.5cm is usually arranged on an upper opening of a prefabricated rafter for laying a roof boarding, and the roof boarding at a standard rafter part can be calculated according to a drawing before installation and cut and installed on site. The roof boarding at the wing angle rafter position is preferably actually measured and measured on site, so that the installation precision is high. The bonding material uses 1: 2 cement mortar, the leveling of the board surface and tight joint are ensured when the roof boarding is installed, and the gap is filled with the mortar after the installation. The gate baffle is used for the position of the fly rafters and the neutral position of the fly rafters, the concrete is prevented from leaking when the concrete is poured, and the gate baffle in the heavy eave structure is also constructed by a cement fiber pressure plate with the thickness of 1.5 cm.

And (3) correction and acceptance: and binding the reinforcing steel bars of the roof after all the rafters and the roof sheathing are installed, and checking the rafters and the roof sheathing before binding so as to avoid irretrievable loss caused by the fact that the rafters and the roof sheathing can not be adjusted after the reinforcing steel bars are bound. When the template and the steel bar project are finished, the template and the steel bar project are checked and accepted again, the cornice template is checked by pulling through wires, and each section of the standard rafter is checked by pulling through wires, so that the size and the position of the structure are accurate before binding the roof and the beam steel bars.

Roof boarding reinforcing steel bar construction:

after the roof formwork is erected, rafter steel bar cast-in-place plate bars, wing angle steel bars and the like are bound in sequence, rafter hanging bars are reserved to form straight heads, and anchoring hooks are bent out when the ribs of the roof plate are bound, so that the construction of the roof plate bars is facilitated.

The size and the placement position of the steel bars are strictly controlled. The longitudinal and transverse reinforcing steel bars are bound by lead wires and fixed with each other. To determine their correct position. The position, length and direction of the bend-up of the bars should also be tightly controlled.

The steel bar should be qualified after delivery, and can be used after being retested, so that pollution is prevented in the manufacturing process of the steel bar. The installation position of the steel bar needs to be correct, and the thickness of a protective layer is ensured

The cornice is a cross member which is overlapped on the head of the rafter and is used for connecting all the eave rafters of the cornice to form a whole. The connecting eave is controlled by adding a vertical baffle on the head part, and the reinforcing steel bars in the connecting eave are formed by extending and binding the reinforcing steel bars in the roof panel.

And (3) roof plate concrete construction:

when concrete is poured, the whole roof is poured from bottom to top in sequence, and the slope of the roof is controlled at any time.

The slump is preferably small when the concrete is poured, and is generally controlled to be between 10 and 12cm, so that the formation of the bag potential of the roof is facilitated.

And after the concrete is poured, covering the concrete by using a plastic film and a felt.

Concrete is watered and cured every day, and particularly, the concrete is required to be watered and cured in summer construction, so that rafters are prevented from cracking.

In conclusion, the cast-in-place concrete rafters and the roof boarding of the antique building are prefabricated and installed, wherein the rafters are made of light ceramsite concrete, and the roof boarding is cut on site by adopting a finished product prefabricated cement fiber pressure plate.

When the main body frame structure is constructed, the concrete rafters are prefabricated one month ahead of the installation time.

When the strength of the frame beam and the frame column meets the design requirement, the prefabricated rafters are orderly installed on the finished main body frame, and the tongue-and-groove is reserved at the tops of the rafters and used for arranging the roof boarding.

The rafters and the roof boarding are used as templates of the roof cast-in-place slab, after the roof boarding reinforcing steel bars are tied, the rafters and the roof boarding reinforcing steel bars are integrated after the roof boarding concrete is poured, and therefore the construction of the antique building structure is completed.

The aim of simplifying the concrete rafters is fulfilled by improving the construction process of the concrete rafters

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The assembly type construction method for the archaized building is characterized by comprising the following steps: the method comprises the following steps:

2. The fabricated construction method for an archaized building according to claim 1, wherein: the steps of manufacturing and installing the die are as follows:

3. The fabricated construction method for an archaized building according to claim 1, wherein: the vibration and maintenance of the rafter concrete comprises the following steps:

stirring the ceramsite concrete for 3-5 minutes to ensure good workability;

the vibration and maintenance of the rafter head and the rafter tail of the wing angle are enhanced, and cracks are avoided.

4. The fabricated construction method for an archaized building according to claim 1, wherein: the steps of the installation and construction of the prefabricated rafters and the roof boarding are as follows: the prefabricated rafters comprise standard rafters and wing angle rafters;

installing a prefabricated standard rafter:

cutting and installing a roof boarding:

5. The fabricated construction method for an archaized building according to claim 4, wherein: the step of installing the wing angle rafters is as follows:

6. The fabricated construction method for an archaized building according to claim 5, wherein: the method for installing the wing angle rafters comprises the following steps:

because the cross section of the wing angle rafter prefabricated by concrete is square, and one side of the wing angle rafter close to the angle beam is raised greatly, the big head of the big head wedge is better towards the root of the angle beam or the rafter, and the root of one wing angle rafter closest to the standard rafter is parallel to the standard rafter by forming a wedge on one side and forming the other side to be parallel to the standard rafter, and the rake is smaller;