CN2154870Y

CN2154870Y - U-shape section concrete channel prefabricated components

Info

Publication number: CN2154870Y
Application number: CN 92204193
Authority: CN
Inventors: 梁觉明
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-09
Filing date: 1992-03-09
Publication date: 1994-02-02
Anticipated expiration: 2002-03-09

Abstract

The utility model relates to a U-shaped section concrete channel prefabricated component, which is suitable for the construction of the drainage and irrigation antiseep channels of farmland. Compared with the ladder type channel, the utility model has better hydraulic condition, but because of the limit of various difficult factors of present construction on the farmland, the utility model is difficult to popularize and use. The U-shaped concrete channel is divided and prefabricated into the single component whose inner circle of the bottom is outside flat. The utility model has the advantages of convenient arrangement on the farmland, no limit of weather and geography, high work efficiency and strong practicability, the material and the labour of the capital construction are saved, and the cost is reduced. The cost of the channel of per kilometer is lower than the construction of a lining machine by 6.66%, and the utility model is a technical measure for speeding up the U-shaped concrete channel construction on the farmland.

Description

U-shape section concrete channel prefabricated components

The design's product is used for irrigation and water conservancy irrigation and drainage Canal System Construction.

In extensive farmland discharging-irrigating antiseep channel building, advocate and adopt " U " tee section concrete canal (being called for short the U-shaped channel) at present, the old canal of original Tu Qu and masonry embedding block is progressively transformed.U-shaped cross section concrete canal will be got well than trapezoid cross section concrete canal hydraulics, and short by the same traffic wetted perimeter, fluidised form is good, and flow velocity is fast, saves building materials, and survivable, maintenance rate is low, long service life.But because construction problem is difficult to rapid popularization.

Building the U-shaped concrete canal, generally is manual cast-in-place in the field, little channel also useful " coffering machine " construction.But the cast-in-place lining cutting in field, it is many to consume raw material, and it is miscellaneous to construct, and it is big to take a lot of work, and especially often is subjected to the construction seasons weather effect, can't carry out smoothly.Because usually irrigation and water conservancy capital construction is arranged in winter or early spring more, in case run into cryogenic freezing or early spring rainy, will hinder construction, influence workmanship, even can't carry out.Some place, the cast-in-place lining cutting in field, also very inconvenient at aspects such as haul, waters.

Simultaneously, as use the machine cast-in-place construction, existing " coffering machine ", still not overripened in Machine Design and aspect of performance, all need keep in repair every day, easily breaks down in the operation, causes shut-down.Use by turns if purchase two above machines, then can increase the input of engineering cost.And coffering machine only is applicable to a kind of channel of specification, and the channel of different section must manufacture and design different coffering machines, or makes the coffering machine generalization, and this is the problem that waits to solve.Coffering machine generally is applicable to newly and builds canals, and to the transformation of old channel, after must spending a large amount of labours in advance and rebuilding the canal bed that matches with coffering machine, just can carry out the coffering machine operation.As lining cutting by hand entirely, then technology is more backward, and the expense material is taken a lot of work, and cost is also big, and weak point is self-evident.

All this kind difficulty causes cast-in-place lining project investment high, and progress is slow, and feasibility is poor.For this reason, the design is with the U-shaped concrete canal, merogenesis is prefabricated into monomer members, see figure one, two, one is the member schematic diagram, and two is member section figure, can be transported to the field discharging whenever and wherever possible and connect construction, be not subjected to the restriction of the multiple factor of cast-in-place construction, make build the U-shaped concrete canal on a large scale can be rapid-result.

This monomer members, big I is decided according to canal capacity, makes series of products.Monomer members is to fuse at the bottom of channel two sidewalls and the canal, and member section inwall is a U-shaped 2, gabarit 3 approximate trapezoid, and just the member bottom be to put down 4,5 outside the interior garden.Interior garden, promptly the bottom is the garden arc, and installation just becomes a U-shaped channel after connecting, and has the good function of U-shaped channel; Outer flat, promptly the member outer bottom is a plane, and there is a knuckle 6 in two outsides, not the same with the inwall garden arc that is.Like this, during the installation of field, the member discharging is very convenient, as long as canal bed bottom surface is evened out, steady once putting, a pair of just neat, channel two stones that side lower part bankets are tamped easily.Take temperature brightly through real, as all making the garden arc inside and outside the member bottom, the promptly whole member that takes the shape of the letter U is then installed when connecting in the field, make reach canal at the bottom of height consistent, about two walls flush, very time-consuming.Same specification, length is the member of 720mm, and flat member is used in one group of construction of six people, can finish 100 meters of channels every day, and member only can be finished 70 meters at the bottom of the garden, and work efficiency differs greatly, and member stone that two bottom sides is banketed is difficult to compacting at the bottom of the garden, easily shake displacement at the bottom of the garden at left and right directions in addition, the normal injustice straggly of bottom height, it is poor to connect the back steadiness, influences the channel quality.Self-evident, if element precast convenient, be prefabricated into two slit bamboo or chopped woods of vertical profile, be combined into a joint during construction again, then the field is laid more difficult.

Member two walls are suitable for reading straight 1, and open and flat outer can be arranged as cast-in-place lining cutting, can be convenient to prefabricated again by material-saving.Certainly, think that necessity also can have the outer.Member two walls outwards are a gradient, with the vertical plane α that has angle, to reduce lateral pressure.The thickness of prefabricated component, increase gradually from top to bottom, upper-thin-lower-thick can with stressed big or small consistent of channel, but concrete consumption does not increase, the intensity then U-shaped member than whole thickness unanimity is big, be difficult for below garden arc position and break off with the fingers and thumb and split, and can improve yield rate when prefabricated, minimizing load and transport and use in fracture.

Install when connecting in the field, and member is suitable for reading to flush with the native face of canal bedside, uses the cement mortar seam between two members.Can think, utilize this monomer prefabricated component to lay the U-shaped channel, will be to quicken the technical measures that the U-shaped concrete canal is built.

Now with 12 cun most widely used in the southern farmland discharging-irrigating canal system single pump (Q=0.18 rice ³/ second) supporting U-shaped channel is an example, and the design's enforcement is described.

1, scantling:

Accompanying drawing two is the member cross section.B ₁=730mm, B ₂=542mm, B ₃=644mm, B ₄=400mm; b ₁=40mm, b ₂=50mm, b ₃=60mm; H ₁=279mm, H ₂=720mm; R=277mm; α=12 °, θ=156 °; Figure one, L=720mm.

2, member materials:

Concrete adopts 425 ° of cement, cement: sandstone=1:2.5.At member bottom transverse appropriate intervals place, add 3 of the reinforcing bars of φ 4-5mm, other positions are without reinforcing bar.It is bright to take temperature in fact, and member is solid firmly, non-cracking loss during carrying.When prefabricated series of products, can take the circumstances into consideration to use reinforcing bar according to the member size.

3, pre-control equipment:

Prefabricated units adopt my metal die of design voluntarily, irritate on the electroshock platform and fill out concrete, again by the go-cart that is used for loading and unloading mould specially, are transferred to the demoulding at that time on the goods field.Some molds can have enough to meet the need use, utilize the mould that varies in size, and promptly can be made into the serial member of different size.

4, prefabricated component is laid the comparison of U-shaped channel and the cast-in-place cost of coffering machine:

Concrete is with 131 yuan/m of present price ³Meter, manually in 10 yuan/worker, every kilometer U-shaped channel cost is mainly to consume amount of concrete and comprehensively to calculate with number.

Every kilometer U-shaped concrete canal, with the prefabricated component construction, its cost is lacked 1017 yuan than mechanical cast-in-place construction, reduces by 6.66%.

Claims

1, a kind of prefabricated units that are used to build farmland " U " tee section concrete canal, it is characterized in that member two side and bottom fuse, a member is exactly one section monomer of U-shaped cross section concrete canal, the cross section takes the shape of the letter U 2 in the member, outer cross section approximate trapezoid 3, the bottom, cross section is to put down 5 outside the interior garden 4, and the member bottom surface is a plane.

2, according to the member of claim 1, it is characterized in that two walls straight nothing suitable for reading along 1 or the edge is arranged, two walls outwards have a gradient, and with the vertical direction α that has angle, member thickness upper-thin-lower-thick increases from top to bottom gradually.