CN203452066U

CN203452066U - Non-prestressed high-strength centrifugal concrete square pile

Info

Publication number: CN203452066U
Application number: CN201320466012.4U
Authority: CN
Inventors: 崔凤祥; 刘永超; 苏永刚; 刘洁
Original assignee: TIANJIN JIANCHENG JIYE GROUP CO Ltd
Current assignee: TIANJIN JIANCHENG JIYE GROUP CO Ltd
Priority date: 2013-07-30
Filing date: 2013-07-30
Publication date: 2014-02-26
Anticipated expiration: 2023-07-30

Abstract

The utility model provides a non-prestressed high-strength centrifugal concrete square pile. The non-prestressed high-strength centrifugal concrete square pile comprises a concrete pile body and end plates at the two ends. A steel reinforcement cage skeleton is arranged in the concrete pile body and comprises a plurality of non-prestressed main ribs longitudinally and evenly distributed and spiral stirrups automatically and fixedly connected to the non-prestressed main ribs. The two ends of the non-prestressed main ribs are fixedly connected into end plate holes in the end plates at the two ends respectively, and two lifting points for transport lifting are arranged on the positions, 0.207L away from the two pile ends, of the concrete pile body. The non-prestressed high-strength centrifugal concrete square pile has the advantages that due to the adoption of mechanized assembly line processing technologies, production efficiency is improved. Damage on the pile body is effectively reduced, the ductility of the pile body is improved by more than 30%, the pile body is prevented from cracking, the overall performance of the square pile is improved by more than 20%, technologies are simple, and the non-prestressed high-strength centrifugal concrete square pile is low in cost, high in cost-performance ratio and large in vertical bearing capacity and pile foundation horizontal bearing capacity and can meet earthquake proofing requirements and be applied to foundation construction on all kinds of properties of soil.

Description

Non-prestressed high-strength centrifugal concrete square pile

Technical field

The utility model relates to foundation construction technology in civil works, particularly a kind of non-prestressed high-strength centrifugal concrete square pile.

Background technology

Concrete is typical fragile material, and modulus of elasticity is high, and its compressive strength and tensile strength are without linear corresponding relation.Along with going deep into of prestressed concrete pipe pile and square pile research in recent years, its horizontal bearing capacity and employing are pressed to steaming technique endurance issues, particularly the horizontal bearing capacity of pre-stressed concrete pipe pile foundation has different viewpoints, therefore, country and part province standard or atlas are made relevant regulations, the prestressed concrete pipe pile scope of application is that non-Anti-Seismic Region and seismic fortification intensity 6 are spent, the areas of 7 degree, if be used in the area of seismic fortification intensity 8 degree, need to check separately, or should not use in the area of seismic fortification intensity 8 degree.

In the production technology of prestressed pile, exist anti-bending strength poor at present, destroy as brittle fracture, ductility is poor, exist prestressed centrifugally square pile to occur carrying out rapidly after cracking, tensile region reinforcing bar enters very soon surrender and constriction until fracture, ultimate bending moment and the cracking moment phenomenon such as be more or less the same.Although can prefabrication, due to from great, generally adopt prestressed steel bar and pre-tensioning system technology, these phenomenons cause square pile fragility large, and ductility is poor, easily occurs the quality accidents such as broken pile and brittle failure.And common square pile is because of the restriction of concrete strength, penetration power is restricted, and screwing steel bars skeleton is manual operation, has improved cost of production, has reduced production efficiency.

Summary of the invention

For structural deficiency in prior art, the purpose of this utility model is to provide a kind of non-prestressed high-strength centrifugal concrete square pile, has effectively improved square pile overall performance and ductility, has avoided in square pile work progress, tilt, displacement is excessive, the phenomenon of rupture failure even.

For achieving the above object, the technical solution adopted in the utility model is to provide a kind of non-prestressed high-strength centrifugal concrete square pile, this square pile includes the end plate at concrete pile body and two ends, in described concrete pile body, be provided with reinforcement cage skeleton, described reinforcement cage skeleton includes many non-prestressed main muscle, spiral stirrup, described non-prestressed main flaccidity of tendon and muscle is to being uniformly distributed, and spiral stirrup is fixedly connected on non-prestressed main muscle automatically; Wherein: described non-prestressed main muscle two ends are fixedly connected on respectively in the end plate end plate bore at two ends, two end positions of described concrete pile body distance are the suspension centre that 0.207L place arranges two transportation liftings.

Effect of the present utility model is to use non-prestressed high-strength centrifugal concrete square pile to adopt mechanization production line processing technology, has greatly improved production efficiency.Effectively reduced the destruction of pile body, improved the ductility of pile body more than 30%, avoided the phenomenon of pile body cracking, improve the overall performance of square pile more than 20%, and technique is simple, cost is low, and cost performance is high, be that a kind of vertical bearing capacity is high, also high, the centrifugal concrete pile that can meet shockproof requirements of pile foundation level bearing capacity, be widely used in the foundation construction of various soil properties.Steam curing process improves concrete strength greatly simultaneously, has therefore improved the penetration power of non-prestressed offcenter squared pile.Centrifugal forming technology has improved concrete compactness, has improved the resistance to corrosion of pile body.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is tip plate configurations schematic diagram of the present utility model;

Fig. 3 is the structural representation of reinforcement cage skeleton of the present utility model and end plate;

Fig. 4 is hoisting point position schematic diagram of the present utility model;

Fig. 5 is section of structure of the present utility model;

Fig. 6 is reserved screw thread partial enlarged drawing of the present utility model;

Fig. 7 is bolt suspension hook of the present utility model and reserved screw thread structural representation.

In figure:

1, non-prestressed master 2, spiral stirrup 3, concrete pile body 4, end plate 5, reinforcing bar 6, end plate bore 7, suspension centre 8, reserved screw thread 9, bolt suspension hook

The specific embodiment

By reference to the accompanying drawings non-prestressed high-strength centrifugal concrete square structure of the present utility model is illustrated.

As shown in Figure 1, 2, 3, non-prestressed high-strength centrifugal concrete square pile of the present utility model, this square pile includes the end plate 4 at concrete pile body 3 and two ends, in described concrete pile body 3, be provided with reinforcement cage skeleton 5, described reinforcement cage skeleton 5 includes many non-prestressed main muscle 1, spiral stirrup 2, described non-prestressed main muscle 1 is longitudinally uniformly distributed, and spiral stirrup 2 is fixedly connected on non-prestressed main muscle 1 automatically; It is characterized in that: described non-prestressed main muscle 1 two ends are fixedly connected on respectively in end plate 4 end plate bore 6 at two ends, two end positions of described concrete pile body 3 distances are the suspension centre 7 that 0.207L place arranges two transportation liftings.

The bolt suspension hook 9 that described suspension centre 7 place's pile bodies 3 are provided with reserved screw thread 8 and match with reserved screw thread 8.Described reserved screw thread 8 is embedded in pile body 3 and cage of reinforcement 5 anchorings.Described bolt suspension hook 9 is screwed in reserved screw thread 8 after forming pile.

Described non-prestressed main muscle 1 arranges the hot rolled ribbed steel bar of different-diameter according to piles with different footpath.

As shown in Fig. 4-7, two end positions of described concrete pile body distance are that 0.207L place arranges two suspension centres 7, and L is pile section length, as this square pile transportation lifting place.Described suspension centre 7 places are made as reserved screw thread 8 and bolt suspension hook 9 two parts, and described reserved screw thread 8 is embedded in pile body 3 and cage of reinforcement 5 anchorings, and described bolt suspension hook 9 is screwed in reserved screw thread 8 after forming pile.

Described non-prestressed main muscle 1 arranges the hot-rolled ribbed rod iron of different-diameter according to piles with different footpath.

Non-prestressed high-strength centrifugal concrete square pile of the present utility model is achieved in that

First by non-prestressed main concrete steel muscle 1 fixed length, cutting die.

Non-prestressed main muscle 1 is longitudinally uniformly distributed, and spiral stirrup 2 automatic seam-weldings, on non-prestressed main muscle 1, are made reinforcement cage skeleton 5; Reserved screw thread 8 is embedded in cage of reinforcement 5, clogs, in case foreign material enter in hole to pouring into butter in reserved screw thread with skin plug.Make end plate 4, then by nonprestressed reinforcement two ends respectively plug welding be connected in the end plate end plate bore 6 at two ends.

Then reinforcement cage skeleton 5 is put into Fang Mo together with end plate 4, carry out concrete feeding, until form pile body.

And then Fang Mo is placed in and on centrifuge, carries out centrifugal forming, after topple over remaining slurry.

Then the good Fang Mo of centrifugal forming is carried out to stream curing by strength grade of concrete requirement; After the demoulding, through Quality Inspector, judge square pile credit rating, then put into square pile and stack field, carry out natural curing.

This square pile, when transportation lifting, after skin plug is removed, is screwed into two bolt suspension hooks 9 in two reserved screw threads 8.Fix and with crane, trigger suspension hook and fill and hang afterwards.

Claims

1. a non-prestressed high-strength centrifugal concrete square pile, this square pile includes the end plate 4 at concrete pile body (3) and two ends, in described concrete pile body (3), be provided with reinforcement cage skeleton (5), described reinforcement cage skeleton (5) includes many non-prestressed main muscle (1), spiral stirrup (2), described non-prestressed main muscle (1) is longitudinally uniformly distributed, and spiral stirrup (2) is fixedly connected on non-prestressed main muscle (1) automatically; It is characterized in that: described non-prestressed main muscle (1) two ends are fixedly connected on respectively in end plate (4) end plate bore (6) at two ends, two end positions of described concrete pile body (3) distance are the suspension centre (7) that 0.207L place arranges two transportation liftings.

2. non-prestressed high-strength centrifugal concrete square pile according to claim 1, is characterized in that: described suspension centre (7) is located the bolt suspension hook (9) that pile body (3) is provided with reserved screw thread (8) and matches with reserved screw thread (8).