CN2659959Y

CN2659959Y - Centrifugal concrete square pile and its moulding forms

Info

Publication number: CN2659959Y
Application number: CNU2003201162320U
Authority: CN
Inventors: 贾燎
Original assignee: Individual
Current assignee: Shanghai Hui Tao Enterprise Cci Capital Ltd
Priority date: 2003-12-05
Filing date: 2003-12-05
Publication date: 2004-12-01
Anticipated expiration: 2013-12-05

Abstract

The utility model relates to a centrifugal concrete square pile and forming dies thereof, particularly a centrifugal concrete preformed pile and forming dies thereof. Both ends of the centrifugal square pile are provided with end plates having round holes in outer parts, the two end plates are connected via a steel reinforcement cage, and the concrete which is in the two end plates and covered the steel reinforcement cage is formed in a centrifugal method. The forming dies use two pipe dies which are covered with each other, and the dies are provided with running wheels and used for centrifugal machines. An equilateral right triangle inner chamber with an identical cross section is respectively arranged in each die, and the two equilateral right triangle inner chambers form a square inner chamber after the dies are covered with each other. The centrifugal concrete square pile has a regular shape dimension, the body of the pile has high concrete strength between C 60 and C 80, a single pile can provide high bearing ability, and the strength of the body of the pile is high. The centrifugal concrete square pile and forming dies thereof use prestressed components having light self weight, convenience in transporting and stacking and low breakage rate of construction, and can not be easily damaged during hoisting, transportation and transmission. Both ends of the centrifugal square pile are provided with the end plates, piles use welded connection, and formed piles have good integrality. The body of the pile has the advantages of high bending resistance rigidity, long pile segment and wide application range.

Description

A kind of centrifugal concrete square pile and moulding form

Technical field the utility model relates to a kind of centrifugal concrete preformed pile and moulding form.

The existing preformed pile of background technology has a lot, if any solid side's stake, hollow square pile, pile tube etc.Solid side's stake, hollow square pile are generally non-prestressed prefabricated units, and anti-bending strength is poor, and lifting, transportation, construction transhipment easily cause pile body crack even fracture to occur; The employing shaping of vibrating, concrete strength grade is generally C30～C40, and the pile body structural bearing capacity is lower, and the external form physical dimension is irregular, easily clips broken in the construction, stake breakage rate height, less economical; The pile body steel using amount is big, and is uneconomical.Solid in addition side's stake is from great, though hollow square pile adopts the drawing method moulding, from heavy and light, other problem still exists.

Though pile tube is a centrifugal forming, have the high advantage of pile shaft concrete strength, pile tube external surface size is little, and the single pile bearing capacity of foundation soil that provides is lower; Bending resistance is not high.

The summary of the invention the purpose of this utility model aims to provide a kind of from heavy and light, transportation, stacking are conveniently, not fragile when lifting, transportation, transhipment, the construction breakage rate is low, become pile integrality good, the pile body bending rigidity is big, and pile body construction length is darker, centrifugal concrete preformed pile and moulding form that the scope of application is wide.

The implementation of the utility model purpose is, a kind of centrifugal concrete square pile, and there is square end plate 1 at two, and the two ends plate connects with reinforcing cage 2, between the two ends plate, the concrete that wraps reinforcing cage 2 is the concrete of centrifugal process moulding.

A kind of moulding form of centrifugal concrete square pile, moulding form adopts the pipe die by two make-ups, it is after identical 6, two pipe dies of equilateral right-angled triangle inner chamber are interlocked with bolt 7 that a cross section is arranged in the every mould, and two equilateral right-angled triangle inner chambers constitute a square inner chamber.

The utility model has following advantage:

1, stake manufacture craft advanced person, the overall dimensions rule, the length of side is unrestricted, adopts 200～800mm usually, pile strength fraction height, the construction breakage rate is low,

2, pile shaft concrete strength grade height is C60～C80, the bearing capacity height that single pile can provide, and good economy performance,

3, adopt prestressed member, from heavy and light, transportation, stacking are conveniently, and be not fragile when lifting, transportation, transhipment,

4, end plate is adopted at two ends, and stake is adopted with stake and is welded to connect, and becomes pile integrality good,

5, the pile body steel ratio is low, good economy performance,

6, the pile body bending rigidity is big, and pile cutoff is long, and the scope of application is wide.

Description of drawings

The centrifugal concrete square pile structural representation of Fig. 1

Fig. 2 end plate structural representation

The forming die structure schematic diagram of Fig. 3 a prestressed centrifugally concrete square pile

The A-A of Fig. 3 b Fig. 3 a is to view

The specific embodiment

With reference to Fig. 1, prestressed centrifugally concrete square pile of the present utility model, there is square end plate 1 at two, and the two ends plate connects with reinforcing cage 2, between the two ends plate, the concrete that wraps reinforcing cage 2 is the concrete of centrifugal process moulding.Between the two ends plate, the concrete that wraps reinforcing cage 2 forms pile body 3.Centrifugal concrete square pile surface is shiny surface or textured.

With reference to Fig. 2, the central bore 4 that square end plate 1, pile cutoff cross the cross section is isometrical concentric circles, and the outside is same or analogous square.Square end plate 1 is thick 12～20mm, round-meshed steel plate in the foreign side, and along the large and small hole of peripheral some mutual UNICOMs that are equally spaced, macropore is for connecting the bolt hole of tensioning equipment, and aperture is the stress hole of support skeleton pier nose.

The used main muscle of reinforcing cage can be prestressed reinforcement or plain bars.Be used to make the prestressed centrifugally concrete square pile, the used main muscle of reinforcing cage is a prestressed reinforcement, is used to make common centrifugal concrete square pile, and used main muscle is a plain bars.

Moulding form with reference to Fig. 3, a kind of centrifugal concrete square pile, employing is by the pipe die of two make-ups, an identical equilateral right-angled triangle inner chamber 5 of geometry is arranged in the every mould, employing is by the pipe die of two make-ups, it is identical equilateral right-angled triangle inner chamber 6 that a cross section is arranged in the every mould, after two pipe dies were interlocked with bolt 7, two equilateral right-angled triangle inner chambers constituted a square inner chamber.Two equilateral right-angled triangles are chamfering for formed square four jiaos.

Adopt the step of the utility model mould preparative centrifugation concrete square pile as follows:

Place a pipe die, the two ends plate at reinforcing cage and two ends is placed wherein, pour concrete, another piece pipe die closes, and, then be put in centrifugal dehydration on the centrifuge with bolt 7 fastenings, promptly form centrifugal concrete square pile, steam-cured again to C40, the demoulding is steamed pressure or natural curing again to more than the C80

Prestressed centrifugally concrete square pile of the present utility model and pile tube, hollow square pile, solid side stake have been done contrast, and its ratio the results are shown in following table:

	①	②		③	④
	①	②		③	④		Offcenter squared pile D400	Pile tube Ф 400	Pile tube Ф 500	Hollow square pile D400	Solid side's stake D400
The pile body structural bearing capacity	1	0.7	1.1	0.5	0.7		Offcenter squared pile D400	Pile tube Ф 400	Pile tube Ф 500	Hollow square pile D400	Solid side's stake D400
The pile body structural bearing capacity	1	0.7	1.1	0.5	0.7	Bearing capacity of foundation soil	1	0.8	0.98	1	1
The concrete piles consumption	1	0.7	1.1	1	1.4	Bearing capacity of foundation soil	1	0.8	0.98	1	1
The concrete piles consumption	1	0.7	1.1	1	1.4	Pile body master muscle amount	1	1.24	1.78	2.23	2.23
The cushion cap concrete	1	1	1.56	1	1	Pile body master muscle amount	1	1.24	1.78	2.23	2.23
The cushion cap concrete	1	1	1.56	1	1	Bending rigidity	1	0.55	1.35	0.85	0.92

From the table the contrast in as seen:

1, the utility model is with respect to pile tube Ф 400, hollow square pile, solid side's pilework bearing capacity height,

2, the utility model is big with respect to pile tube Ф 400, pile tube Ф 500 bearing capacity of foundation soil,

3, the utility model is few with respect to solid side's stake concrete piles consumption,

4, the utility model is few with respect to all piles master muscle consumption,

5, the utility model is big with respect to other bending rigidities of the equivalent diameter or the length of side.

Claims

1, a kind of centrifugal concrete square pile is characterized in that there is square end plate (1) at two, and the two ends plate connects with reinforcing cage (2), between the two ends plate, the concrete that wraps reinforcing cage (2) is the concrete of centrifugal process moulding.

2, centrifugal concrete square pile according to claim 1 is characterized in that the central bore (4) of square end plate (1), pile cutoff cross section is isometrical concentric circles, and the outside is same or analogous square.

3, centrifugal concrete square pile according to claim 1, it is characterized in that square end plate (1) is thick 12～27mm, round-meshed steel plate or cast steel plate in the foreign side, big aperture along peripheral some mutual UNICOMs that are equally spaced, macropore is for connecting the bolt hole of tensioning equipment, and aperture is the towing pad of support cage of reinforcement pier nose.

4, centrifugal concrete square pile according to claim 1 is characterized in that the used main muscle of reinforcing cage can be prestressed reinforcement or plain bars.

5, centrifugal concrete square pile according to claim 1 is characterized in that centrifugal concrete square pile surface is shiny surface or textured.

6. the moulding form of a centrifugal concrete square pile, it is characterized in that moulding form adopts the pipe die by two make-ups, it is identical equilateral right-angled triangle inner chamber (6) that a cross section is arranged in the every mould, after two pipe dies were interlocked with bolt (7), two equilateral right-angled triangle inner chambers constituted a square inner chamber.

7. moulding form according to claim 6 is characterized in that two equilateral right-angled triangles are chamfering for formed square four jiaos.

8. moulding form according to claim 6 is characterized in that the mould that moulding form uses on centrifuge, running wheel (5) is arranged on the mould.