CN201661001U - Precast concrete slab - Google Patents

Abstract

The utility model discloses a precast concrete slab, which is provided with a slab main body. At least two upright sleeves which are provided with female threads and are communicated with the outside world are embedded at the top surface of the slab main body. When in operation, screw rods are screwed into the sleeves, the top parts of all screw rods on the precast concrete slab at the same layer are adjusted to the same elevation and then the precast concrete slab at an upper layer is lifted, thereby effectively ensuring the levelness of the precast concrete slab at the upper layer.

Description

Precast concrete plank

Technical field

The utility model belongs to building material field, refers to a kind of precast concrete plank especially.

Background technology

With the plate that Reinforced Concrete Materials is made, be basic structure or the member in building construction and the various engineering structures, be commonly used for roof system, superstructure, platform, wall, retaining wall, basis, terrace, road surface, pond etc., range of application is extremely wide.Armored concrete slab is by the flat shape side of being divided into plate, plectane and sketch plate, is divided into one-way slabs and two-way slab by the stressed mode of action of structure.The modal two-way slab without beams that one-way slabs, supported along four sides two-way slab is arranged and support by post.

Concrete slab has cast-in-place and prefabricated two kinds.Cast in place concrete plate usually and reinforced concrete beam be linked to be integral body and form the continuous form of structure of multispan, owing to be on-the-spot global formation, so good integrity, for having pipeline to pass or flooring in irregular shape still is well suited for, but its operation is many, wet trade is many, on-the-spot pouring, and construction period is longer.In order to improve efficiency of construction, in the roof system and superstructure of industry and civilian construction, precast concrete plank but is widely used, and precast concrete plank commonly used has solid plate, hollowcore slab and trough slab, and the width of plate is decided on the actual conditions of local manufacturing, lifting and haulage device.

Yet reality is that precast concrete plank is built with mould in advance and formed, the incomplete inevitably rule in the surface of each precast concrete plank.Demonstration example shown in Figure 1A, Figure 1B, the upper surface out-of-flatness of following precast concrete plank 80 has an error angle [alpha] with horizontal plane, and the also out-of-flatness of the soffit of last precast concrete plank 90 has an error angle beta with horizontal plane.When last precast concrete plank 90 is lifted on down precast concrete plank 80, will make the precast concrete plank and the horizontal plane that install form a cumulative errors alpha+beta.Circulation is gone down if so, and cumulative errors certainly will be increasing, brings very big potential safety hazard to building, and expectation technically improves.

Summary of the invention

The purpose of this utility model easily forms cumulative errors, thereby a kind of novel precast concrete plank is provided at the surface irregularity of precast concrete plank in the prior art when constructions work.This precast concrete plank has a plate main body, and the end face of described plate main body is embedded with at least two vertical sleeves that have internal thread and be in communication with the outside.

Wherein, when operation, screwing in the described sleeve has screw rod, and will all be adjusted to same absolute altitude with the top of all screw rods on the precast concrete plank of layer.Lift the upper strata precast concrete plank more thereon, thereby can effectively guarantee the levelness of upper strata precast concrete plank.

Description of drawings

Figure 1A, Figure 1B easily form the principle schematic of cumulative errors for hoisting prefabricated concrete slab in the prior art;

Fig. 2 is the solid combination schematic diagram of the utility model precast concrete plank;

Fig. 3 is the perspective exploded view of the utility model precast concrete plank; And

Fig. 4 is the lifting schematic diagram of the utility model precast concrete plank.

The specific embodiment

Shown in Fig. 2～3, be precast concrete plank of the present utility model, this precast concrete plank has a plate main body 10, and the end face 11 of plate main body 10 is embedded with two vertical sleeves 12, and sleeve 12 has internal thread, and its inside is in communication with the outside.

When operation, will all lift with layer precast concrete plank, as shown in Figure 4, then screw rod 20 is screwed in the sleeve 12 of precast concrete plank, and will be adjusted to same absolute altitude by level gauge with the top 21 of all screw rods 20 on the precast concrete plank of layer.Lift the upper strata precast concrete plank more thereon, thereby can effectively guarantee the levelness of upper strata precast concrete plank and be unlikely to that bigger error is arranged.So circulation is gone down, and cumulative errors certainly will be reduced greatly.

Claims (3)

1. a precast concrete plank has a plate main body, it is characterized in that, the end face of described plate main body is embedded with at least two vertical sleeves that have internal thread and be in communication with the outside.

2. precast concrete plank as claimed in claim 1 is characterized in that, screwing in the described sleeve has screw rod.

3. precast concrete plank as claimed in claim 2 is characterized in that the top of described screw rod all is adjusted to same absolute altitude.

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