CN103953191A - Cast-in-place type rotating-around-fixed-shaft stair construction method - Google Patents

Abstract

The invention relates to a cast-in-place type rotating-around-fixed-shaft stair construction method. The construction method comprises the following steps of A, woodworking processing: prefabricating a semicircular arc mold, prefabricating a pedaling base plate, prefabricating a column hoop which is made of threaded steel and consists of two semicircles, flattening and perforating two ends of the column hoop, and fastening the column hoop through a bolt; B, positioning and paying off: paying off a start pedaling line and a stop pedaling line, paying off a dotted curve from a drawing, and paying off an inner arc line and an outer arc line in a horizontal projection of a stair; C, mounting, dismounting and reinforcing a template. A rotating stair supporting method is easy to operate, and the stair is easy to mount and dismount; a worker can master the method through simple training; furthermore, the stair is high in overall stability, high in external quality and high in safety coefficient; by the use of waste plywood and square wood, materials can be saved.

Description

A kind of Cast-in-situs type is around fixed axis spiral stairs construction method

Technical field

The present invention relates to a kind of construction techniques, especially a kind of Cast-in-situs type is around fixed axis spiral stairs construction method.

Technical background

The design pattern of spiral stairs is varied, owing to relating to the needs of moulding and function, gives installing and bringing much inconvenience of construction, if mold method is improper, not only the error of member does not meet the regulation of specification sometimes, nor meets the requirement of design model etc.It is bad that the spiral stairs erection method that inserts centered cylinder after traditional prefabricated marking time has resistance to overturning, the problem such as presentation quality is poor, and safety factor is low, and workman's operation easier is large, and labor productivity is low.

Summary of the invention

The object of this invention is to provide a kind of globality that can ensure spiral stairs, can make again the outward appearance of spiral stairs reach prefabricated effect, Cast-in-situs type economic, attractive in appearance is around the construction method of fixed axis spiral stairs.

For addressing the above problem, a kind of Cast-in-situs type of the present invention, around fixed axis spiral stairs construction method, comprises the following steps,

A, carpenter processing, prefabricated semi-circular arc mould, prefabricated sub-tread, prefabricated tie, tie by screw-thread steel make, formed by two semicircles, flat perforating is pounded at two, uses bolton.

B, location unwrapping wire, emits starting and steps on line and walk and step on line eventually, and dotted line in figure is released, and camber line in stair horizontal projection and outer camber line are all released;

C, template is by tearing open and reinforcing: accomplish fluently the positioning bar of cylinder and the eye of the positioning bar that starting is stepped on and nail on reinforcing bar, install the column-form of stair step bottom, after the lower cylindrical of marking time formwork erection is good, first be the shelf of setting up support system, foot three is stepped on wood support, later with steel pipe support, the distribution of steel tube poles is set up according to ground institute unwrapping wire, two vertical rods side by side, main root every three is stepped on a vertical rod, peripheral every two vertical rods, and vertical rod must not distribute to be affected the laying of sub-tread and marks time interior lateral wall installation and reinforcing; Lay sub-tread, sub-tread inner side is followed closely on post mould with iron nail, then on base plate, put spirit level, adjust floor level bar, until be transferred to level; After base plate discharges water and puts down, make base plate and ground put stair line with line cone cone base plate periphery consistent, and fixed; On the interior lateral wall of marking time; Upper step plate top column-form, installs step plate; Form removal.

This spiral stairs erection method is simple to operate, is easy to installation and removal, and workman can grasp through simple training, and it is good to have resistance to overturning, and presentation quality is good, and safety factor is high, uses waste and old veneer and flitch can save material.

Brief description of the drawings

Fig. 1 is the layout plan of marking time of the present invention.

Fig. 2 is the inner side of the present invention sectional drawing of marking time.

Fig. 3 is the structural representation of cylinder post mould of the present invention.

Detailed description of the invention

One, Cast-in-situs type is around fixed axis spiral stairs construction technique principle

The 2 plate width of marking time will meet shown in Fig. 3, step plate by some at a upper step the inside, Fig. 3 dotted portion.Centered cylinder 3 and spiral stairs disposal pouring concrete like this, the prefabricated and formwork of cylinder 3 has just had very large difficulty.

1, first the 2 inner side sections of marking time are carried out to deployment analysis, pillar tooth mouth is had to detailed understanding, so that the making of cylinder 3 and reinforcing.Cylinder 3 templates are made of flitch, the inner three-ply board flush coat of using.

2, the 2 outside sections of marking time carry out deployment analysis, and with to the setting up of stair support system, the distribution of vertical rod provides foundation.Support system is set up with steel pipe, and 2 height of marking time regulate and use leading screw.

Two, Cast-in-situs type is around fixed axis spiral stairs construction method

1, joining mould calculates

1., carpenter first processes the batten of 3.5cm*5cm, batten is processed by sheet material, batten processing request sectional dimension standard is straight.2. prefabricated semi-circular arc mould, it is to have veneer flitch to process.The radius of cylinder be 35cm to add width be that 5cm is 40cm, circumferential edge stretches 15cm, is convenient to reinforce.The logical limit of column-form prefabricated point of stair step top, bottom and cylinder is as prefabricated according to Fig. 1 in Fig. 3 inboard cinch of marking time, this is the key of centered by post axis of marking time, tooth open height will become ladder 7cm*17cm, and a tooth mouth is followed closely together closely by two battens, batten is reserved and is reserved internal mold with three-ply board afterwards, to ensure when pouring concrete not spillage, concrete surface is smooth, has good perception.3. prefabricated sub-tread, base plate is prefabricated with veneer and flitch, veneer is that 1.5cm is thick, flitch is 5cm*10cm, flitch vertical with as, prefabricated shape is as shown in the figure.4. prefabricated tie, tie is made up of the screw-thread steel of 12mm, is made up of two semicircles, and flat perforating is pounded at two, uses bolton.

2, location unwrapping wire

By professional lineman, according to structural drawings, emit starting and step on line and walk and step on line eventually, and dotted line in figure is released, camber line in stair horizontal projection and outer camber line all to be released, it is clear bright and clear that the line of emitting is wanted, fine convenient construction personnel's construction.

3, template is by tearing open and reinforcing

1. first carpenter wants electricity consumption to beat the positioning bar of cylinder and the eye of the positioning bar that starting is stepped on and nailed on reinforcing bar, the standard that the positioning bar of cylinder will be beaten, and density is close.

2. install the column-form of stair step bottom, install the Article 2 dotted line that will step on according to starting and place, place accurately, verticality must not be greater than 3mm, and the good bottom part of disposable reinforcing.

3., after the lower cylindrical of marking time formwork erection is good, be first the shelf of setting up support system.Foot three is stepped on wood support, later with steel pipe support, the distribution of steel tube poles is set up according to ground institute unwrapping wire, two vertical rods side by side, main root every three is stepped on a vertical rod, peripheral every two vertical rods, vertical rod must not distribute to be affected the laying of sub-tread and marks time interior lateral wall installation and reinforcing, be evenly distributed, succinctly, be convenient to reinforce cylinder, support system will have the stability of enough intensity, rigidity and entirety, safe and reliable, to ensure for the support system of R+1 layer (namely domestic two layers) the unimpeded of passage of constructing.Set up requirement, all cruciform fastening for falsework must and the colligation of vertical rod phase, can improve like this stability of support system.

4. lay sub-tread.Because be leaf formula spiral stairs, the laying of each sub-tread is independently, and upper plate levelling bar is also independently.The thickness of step plate, the thickness of step plate cylindrical root is 20cm, the thickness of outermost is 15cm, due to the standard of the column-form placement below step plate, we are definitely (being convenient to the dismounting of column-form) and following closely on post mould with 4cm sub-tread inner side, then on base plate, put spirit level, adjust floor level bar, until be transferred to level.After base plate discharges water and puts down, make base plate and ground put stair line with line cone cone base plate periphery consistent, and fixed.

5. the interior lateral wall of marking time on.On the interior lateral wall of marking time want vertical closely knit with base plate, reinforce firm stable, lateral wall is accomplished to mark time and contact closely knitly with upper one, although the height of marking time is 17cm, Concrete Thick 15cm outside step plate, in order not scatter concrete and running pulp, helps mould to push up and puts in place.

6. go up step plate top column-form.Cylinder upper mould is placed the stair line that also will put according to ground and is placed, and will in cylinder, will place the pillar cross section of some and control muscle, to ensure pillar cross section before placement.The reinforcing of post mould is used tie, and tie is distributed in 50cm left and right, and it is disposable that tie uses, and tie will be carried tightly.The correction of pillar is calibrated in the time placing bottom post mould, now will check, and does not ensure the quality of pillar.

7. step plate is installed.The installation baffle plate of marking time is last procedure that stair are installed, and the baffle dimensions of marking time is wanted standard, and upper level is installed, and lateral vertical is reinforced firmly.

8. form removal.After pouring concrete, form removal after concrete reaches certain intensity, be first to remove mark time baffle plate and the interior side form of marking time, then remove post mould, reach 270BAR at concrete strength and can remove support system and stair step base plate.After form removable, to carry out timely cleaning brush oil, reparation, pile up second layer template construction.

Claims (1)

1. Cast-in-situs type, around a fixed axis spiral stairs construction method, is characterized in that: comprise the following steps,

A, carpenter processing, prefabricated semi-circular arc mould, prefabricated sub-tread, prefabricated tie, tie by screw-thread steel make, formed by two semicircles, flat perforating is pounded at two, by bolton;

B, location unwrapping wire, emits starting and steps on line and walk and step on line eventually, and dotted line in figure is released, and camber line in stair horizontal projection and outer camber line are all released;

C, template is by tearing open and reinforcing: accomplish fluently the positioning bar of cylinder and the eye of the positioning bar that starting is stepped on and nail on reinforcing bar, install the column-form of stair step bottom, after the lower cylindrical of marking time formwork erection is good, first be the shelf of setting up support system, foot three is stepped on wood support, later with steel pipe support, the distribution of steel tube poles is set up according to ground institute unwrapping wire, two vertical rods side by side, main root every three is stepped on a vertical rod, peripheral every two vertical rods, and vertical rod must not distribute to be affected the laying of sub-tread and marks time interior lateral wall installation and reinforcing; Lay sub-tread, sub-tread inner side is followed closely on post mould with iron nail, then on base plate, put spirit level, adjust floor level bar, until be transferred to level; After base plate discharges water and puts down, make base plate and ground put stair line with line cone cone base plate periphery consistent, and fixed; On the interior lateral wall of marking time; Upper step plate top column-form, installs step plate; Form removal.