CN102061753A

CN102061753A - Method for controlling thickness of cast-in-place concrete floor slab by point-line-plane control method

Info

Publication number: CN102061753A
Application number: CN2009102222513A
Authority: CN
Inventors: 牛俊平
Original assignee: ZHEJIANG DONGYANG THIRD CONSTRUCTION ENGINEERING Co Ltd
Current assignee: ZHEJIANG DONGYANG THIRD CONSTRUCTION ENGINEERING Co Ltd
Priority date: 2009-11-15
Filing date: 2009-11-15
Publication date: 2011-05-18
Anticipated expiration: 2029-11-15
Also published as: CN102061753B

Abstract

The invention discloses an innovation of a method for leveling a cast-in-place concrete floor slab of a construction site, which is particularly suitable for a beam slab template which has a longer span and is required to be arched and can greatly improve accuracy for controlling elevation. The defects such as large floor slab thickness deviation, limited control range and the like are overcome aiming at the conventional elevation control method; and a point-line-plane control method is invented under the enlightenment of a calculus theory to control the thickness of a cast-in-place concrete beam and the thickness of a cast-in-place concrete slab. The principle is a geometric principle that a plane is controlled by using a point and a line, and a big plane is slightly divided into a plurality of small planes. An implementation method of the point-line-plane control method comprises the following steps that: the entire floor slab plane is divided into a plurality of small planes for controlling; each small plane is controlled by placing one end on a leveling stool by using a point (a leveling stool for short) which has height equal to thickness of the concrete slab and a line (a floating rule) which has height equal to the thickness of the concrete slab and sweeping the other end, so that the concrete floor slab can be leveled, and the operation is similar to plastering operation of screeding. The method has the practical advantage of high control accuracy, easiness in operation and the like.

Description

Point line traffic control face method control cast-in-place concrete floor thickness

Technical field

Patent of the present invention is a kind of innovation to job site cast-in-place concrete floor leveling method, and being particularly useful for span maybe needs greatly to do the beam-slab template that arch camber is handled, and can improve the accuracy of control absolute altitude greatly.

Background technology

In the building engineering structure construction, the control of cast-in-place concrete floor thickness is a difficult problem in the industry always.Now the control method of current slab thickness is an absolute altitude control method, promptly is ferreted out the five zero levels point with respect to floor face on post, wall reinforcing bar, backguy control panel face absolute altitude then, thus control beam, plate thickness indirectly.This control method has the link of many generation errors, and as the deviation that template is installed absolute altitude, five zero levels are copied the deviation of survey, the deviation of institute's backguy rope, and deviation that leveling work produced or the like is difficult to so want to control in the deviation range that standard allows; If structural span is big, beam-slab template needs arch camber, and the deviation of slab thickness is just bigger.

Summary of the invention

Patent of the present invention is big at existing absolute altitude control method control slab thickness deviation, and control range such as is limited at defective, is subjected to that calculus is theoretical to be inspired, and invents the method for a kind of some line traffic control face and controls cast-in-situ concrete beam, plate thickness.Its principle is plane of one one line traffic control, and big plane differential is become several faceted geometrical principles.

The implementation method of some line traffic control face method is whole floor face to be resolved into several facets control, each faceted control utilization and concrete thickness of slab are shelved on the levelling stool by an end with high " line " (floating rule) with high " point " (hereinafter to be referred as levelling stool) with the concrete thickness of slab, the other end is scraped by sweeping, the levelling cast-in-place concrete floor is similar to the operation of plastering of pasting the cake floating screed.

Point line traffic control face method control cast-in-place concrete floor thickness has following characteristics:

1. break the whole up into parts.Plan is built flooring be divided into several facets and control, the large deviation of having avoided large tracts of land control to cause.

2. simulated control, control accuracy is clear and definite, the control accuracy height.In each faceted control, the control tool support is in template, and simulated templates face control floor is built face, and control deviation only results from simulation precision, and the template installation deviation can not accumulate in the floor.

3. simple to operate.Operating process is similar to the operation of plastering of pasting the cake floating screed, and is easy to implement, is easy to promote.

Description of drawings:

Fig. 1 levelling stool schematic diagram;

Wherein: 1 handle, 2 reinforcing bar supporting legs, 3 steel bench faces.

Fig. 2 levelling and thickness of slab control procedure schematic diagram

Wherein: 1 cast-in-situ floor, 2 levelling stools, 3 floating rules are scraped sliding scope, 4 floor limit floating rule floating screeds, 5 floating rules

The specific embodiment:

Levelling stool → making concrete → vibrate → levelling → receipts face is prepared → laid to material

Material is prepared

1. make the levelling stool

Cut a thick 5mm, the length of side is the equilateral triangle steel plate of 350mm, on three angles of steel plate, respectively weld the reinforcing bar supporting leg of Φ 12 ends pinching (slightly blunt nosed) then, require the thick long concrete thickness of slab that just in time equals of upper supporting leg that adds of steel plate, in order to guide and support conveniently, again at a handle of stool upper surface weldering (seeing Fig. 1 for details).The specification of levelling stool is highly divided by it, and the quantity of same specification levelling stool should not be less than 3.

2. make the aluminium alloys floating rule

Determine floating rule length by floor arch camber requirement.Arch camber is 2 ‰ when following, and chi length is advisable with 2m; Arch camber is 3 ‰ o'clock, and chi length should be not more than 1.5m.

Lay the levelling stool

Triangular in shapely lay three levelling stools on flat panel form face to be poured.The levelling stool is laid spacing and can be calculated out by slab thickness allowable variation value and beam slab arch camber value, slab thickness allowable variation value is+8 ,-5mm, arch camber is generally 1/1000～3/1000 of beam slab span, calculate by 2/1000 arch camber, the length of straigh line that produces the 5mm deviation is 2.5m, consider simultaneously easy to operate, the levelling stool lay the distance to be advisable less than 2m.

The making concrete

Concrete making fabric width should be finished when watering second width of cloth again with a width of cloth concreting, and the concrete of building earlier on two width of cloth concrete surfaces initial set not yet exceeds; The concrete making is reference with the levelling stool, and making thickness should be a little more than the levelling stool, to reserve the amount of contraction of vibrating.Meeting beam and vertical member in the making should first casting beams and vertical member, and with beam and the vertical member concrete vibration compacting of going ahead of the rest.

Vibrate

Vertically build direction with vibration board and vibrate back and forth, slab vibrates with poker vibrator.

Levelling

Leveling method and flow process are: is the basic point floating screed with the aluminium alloys floating rule with two levelling stools by the floor limit, floating rule one end is supported on the 3rd the levelling stool then, the other end slides along institute's floating screed line and wipes concrete surface off, has so just finished the control of a fan-shaped faceted levelling and thickness of slab; Mobile levelling stool, still triangular in shape in place, two capable again floating screeds of levelling stools carry out second faceted leveling work along the floor limit, and the delta-shaped region between the controlled facet of former and later two triangles then can utilize the plate face of levelling to carry out the dotted line leveling work for " line "; So analogize strip of levelling.From the second strip, then main strip with levelling is " line ", and only mobile levelling stool carries out the dotted line leveling work and gets final product.So dotted line moves repeatedly and advances, and finally finishes the control (seeing Fig. 2 for details) of whole plate face.

The receipts face

Behind the concrete leveling, check concrete thickness with plugging in pricker, check errorless after, the plate face is rubbed with the hands mao floating with wood float.

Claims

1. some line traffic control face method is controlled cast-in-place concrete floor thickness, it is characterized in that:

The geometrical principle on a plane of one one line traffic control.

2. according to claim 1 some line traffic control face method, it is characterized in that when the floor design needs arch camber, adopt traditional absolute altitude method, be difficult to control the height of arch camber, and some line traffic control face rule can be finished control to slab thickness by whole cast-in-situ concrete beam, plate being divided into several little zones.