CN205753309U - Prefabricated cable duct - Google Patents

Abstract

This utility model provides a kind of prefabricated cable duct, it is characterized in that: two vertical sections are that the concrete prefabricated element of L-type is staggered relatively, connecting with casting concrete structure between the relative end face on the base of two components, said two component and a casting concrete structure form a U-shaped cable slot body；More than one U-shaped cable slot body is spliced to form cable duct.This utility model short construction period, assembly type, province's expense.

Description

Prefabricated cable duct

Technical field

This utility model belongs to a kind of civic building engineering accessory, particularly relates to a kind of cable duct.

Background technology

Cable duct refers to be excavated by design requirement and built by laying bricks or stones, the sidewall weld load slotted-angle shelving of ditch on request ground connection, on Cover is with the underdrain of cover plate, it is simply that cable duct.Its purposes is exactly the underground designated lane of cabling.It is extensively applied In building, electricity substation, power plant, municipal construction.

Traditional cable ditch makes form at present three kinds: brick cable duct, cast-in-place concrete cable duct, U-shaped pre-fabricated electric cables Ditch.

Brick cable duct:

Such as Fig. 1, material commonly used by brick setting cable duct 10 autoclaved lime-sand brick, concrete brick, a shale brick etc., and strength grade >= MU10, general requirement uses M15 masonry of cement mortar.The thickness of furrow bank is according to ditch depth, in conjunction with generally 240mm after Force Calculation And 370mm.Arranging the thick concrete breast beam 11 of 2 road 120mm on furrow bank, when current supply cable support is installed, fixed expansion bolt 12 is used. Bottom of trench has guiding gutter 13, ditch top to have light-weight cover board 14.

Advantage:

The most easily gather materials on the spot.Brick setting can be the materials such as shale brick, colliery wastes brick and flyash brick, and wide material sources are sold Valency is cheap；

2. brick block masonry has good fire resistance and preferable durability；

3. easy construction, strong adaptability.Template and special construction equipment is need not when masonry is built by laying bricks or stones.At cold district, Winter can also build by laying bricks or stones by freezing process, is not required to special Insulation.

4. brick setting is load-bearing material, also possesses certain heat preservation and insulation simultaneously.

Inferior position:

1. the intensity of masonry is the most relatively low, thus the sectional dimension of component is relatively big, and material usage is many；

2. masonry build substantially manual mode by laying bricks or stones, the construction amount of labour is big；

3. tension and the shearing strength of masonry are the lowest, thus anti-seismic performance is poor, by a definite limitation on using；

4. some areas are still using clay-brickmaking, cause land resource to waste, and too much take farmland, and impact agricultural is raw Produce.

Cast-in-place concrete cable duct:

Such as Fig. 2, cast-in-place concrete cable duct 20 material is plain concrete, and strength grade is typically no less than C20.Ditch wall thickness According to ditch depth, typically take 200mm～250mm in conjunction with Force Calculation and detailing requiments.When electrically installing, cable bearer is directly with swollen Swollen bolt 22 is fixed on furrow bank.Bottom of trench has guiding gutter 23, ditch top to have light-weight cover board 24.

Advantage:

The most easy to use, support template and reinforcing bar with the use of, it can be made to have good plasticity, physical dimension, Wall thickness and meet and have unrivaled advantage in O. gracilipes requirement；

2. price is relatively low, abundant raw materials, big and medium-sized cities commercialization；

3. high-strength durable.Concrete has good durability, contrasts masonry structure, and concrete structure stability is good, anti- Shock stability is good；

4. performance is easily adjusted.Along with the development of concrete technology, multiple intensity can be manufactured or possess property, as Water-proof concretes etc., conveniently meet the needs of various Structural Engineering；

5. concrete can utilize the industrial waste such as slag, flyash, draws materials extensively, utilizes industrial waste former as producing Material also helps environmental protection.

Inferior position:

First, construction period and curing cycle are long, and cold district winter construction is limited；

2. site construction technology requires higher, and easily the most up to standard because of construction technology or operation the most strictly causes component to have one A little quality problems；

3. casting and compacting of concrete and maintenance quality are difficult to ensure that, thus easily occur crack to affect perception etc. after longtime running.

U-shaped pre-fabricated electric cables ditch:

Such as Fig. 3, starting a kind of assembly type cable slot version occurred in recent years, its construction features is that cable duct 3 breaks Face is formed in one formula precast concrete, between every section of preform length 0.8～1.5m, prefabrication, and job site is spliced. Furrow bank has prepared screw-bolt hole 32.Bottom of trench has reserved rhone 33, and there is light-weight cover board 34 on ditch top.

Advantage:

1. industrialization, mass production, save material, reduces construction cost.

2. process standard, component complete set, advantageously ensure that the quality of component.

3. reduce the weather restriction to construction, improve work efficiency, speed up the work.

4. improve Contraction in Site condition, reduce labor strength.

5. reduce or reduce the noise of job site, dust, the waste water pollution level to environment.

6. promote that industry restructuring and building industrialization produce.

Inferior position:

1. size is fixed, and need to be respectively directed to every kind of channel dimensions exploitation particular mold, and cost is difficult to reduce；

2. U-type groove is bulky, transport inconvenience, increases construction cost further；

3. ditch intersegmental employing pointing with cement mortar is to thermal expansion and the poor resistance of ground inhomogeneous deformation.

4. pumping equipment the most still uses cast-in-place ditch section, arranges catch pit, it is impossible to realize zero template construction.

Utility model content

This utility model provides a kind of prefabricated cable duct, its objective is to solve the shortcoming that prior art exists, gram Take the traditional brick and construction period of concrete cast-in-situ cable duct existence and length curing cycle and easily because construction technology does not reaches Mark or operation the most strictly cause component to there are some quality problems, in order to overcome U-shaped pre-fabricated electric cables ditch to there is R&D costs height, fortune Defeated costly, the shortcoming such as Installation Modes and operational reliability difference, and the one provided can comply with present short construction period, assembling Type, the novel product of province's expense.

This utility model solves its technical problem and be the technical scheme is that

A kind of prefabricated cable duct, it is characterised in that: two vertical sections are that the concrete prefabricated element of L-type is put relatively Putting, connect with casting concrete structure between the relative end face on the base of two components, said two component and one water Build concrete body and form a U-shaped cable slot body；More than one U-shaped cable slot body is spliced to form cable duct.

Of the present utility model have the beneficial effect that

The cross section of two L-type Component compositions is adapted to different cable duct width, decreases the number of mould research and development Amount；

Owing to L-type component volume is little, it is easier to arrangement when transport than U-shaped component and stacks, it is meant that bicycle delivery quantity It is greatly promoted, effectively reduces cost of transportation；

L-type prefabricated components are lightweight, can complete, even in the case of condition deficiency with small-sized hanging equipment during handling Can manually load and unload and installation in place, motility is greatly improved；

Seam crossing arranges water expandable waterstop, and while meeting cable duct waterproof requirement, ditch body stitching portion is reserved Gap can double as using into expansion joint；

The raceway groove of L-type prefabricated component composition waters region after natively having a concrete due to centre, therefore can arrange flexibly Drain pipe, it is not necessary to do traditional brick or cast-in-place concrete ditch section at a certain distance, more motility in terms of raceway groove draining, and It is truly realized zero template construction, improves efficiency.

Accompanying drawing explanation

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Fig. 1 is brick cable duct structure chart；

Fig. 2 is cast-in-place concrete cable duct structure chart；

Fig. 3 is U-shaped pre-fabricated electric cables groove structure figure；

Fig. 4 is this utility model structure chart.

Detailed description of the invention

In order to be illustrated more clearly that the technical solution of the utility model, the accompanying drawing used required in describing will be made below Introduce simply, it should be apparent that, the accompanying drawing in describing below is only embodiments more of the present utility model, for this area From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The design of concrete prefabricated structure:

Bearing capacity calculation: cable furrow bank is cantilever member, cable duct both sides ground preloading grade presses 10kPa consideration, operculum colpi Plate design live load 4kPa, the maximum cable load of that cable load provides according to electric specialty, corresponding channel dimensions considers. Trench floor thickness and the same furrow bank of arrangement of reinforcement, do not play control action.

Normal applying working condition calculates: under crack based on the accurate permanent combination calculation cantilever slab of load and action of long-term load Amount of deflection.Fracture width is pressed 0.2mm and is controlled, and amount of deflection limits C and considers according to L/100, i.e. under furrow bank top long term deep for 1.2m Deformation values less than 24mm.

Lifting operating mode: based on the above arrangement of reinforcement value calculated, consider by 2 liftings, check single-unit build allowed by Long length.

Detailing requiments: thickness of concrete cover, by the plate value in two (b) class environment, can meet cold and severe cold ground The environment more than district's frost line contacted with water or the soil without erosion property of inclining.Code requirement is 25mm, owing to L-type component is that factory is pre- System, compact-type is good, and quality is guaranteed, and concrete grade is higher, uses C35, and specification is allowed that protective layer thickness suitably reduces, taken 20mm。

Anti-floating calculates: defence water level considers according to-0.5m, owing to ditch body is relatively light, and may be because of under idle condition Buoyancy force of underground water and produce floating, solution for trench floor arrange choose ear, utilize top earthing weight balancing water buoyancy.

Raceway groove is waterproof: raceway groove seam controls at 2mm, middle part filling water expandable waterstop, is fastened by bolts power, makes chance Water expansion sealing strip and two lateral sulcus bodies fit tightly.Bottom ditch, post-cast strip is mixed extender with high one-level concrete and is watered and smash, construction joint Not otherwise processed.

Raceway groove draining: burying Φ 40PVC pipe at along direction, post-cast strip underground every 2m, the water in raceway groove is managed by Φ 40PVC Being aggregated in the Φ 100PVC pipe of ditch foot mat bottom, Φ 100PVC pipe is buried underground along ditch length direction is elongated, and connects every about 20m Enter neighbouring inspection shaft.

Ditch section connects: with small-sized hanging device the most in place after, the adjustment of the power of the being fastened by bolts portion of running business into particular one, and be finally completed Install.

Raceway groove intersect: cable duct intersect corner, use corner ditch section splice, thus be combined into cable duct L-shaped, T-shaped, decussation.

Trench ends: use prefabricated shrouding, reserved bolt docking port, it is connected fixing with ditch body bolt.Can during distant view enlarging Dismounting shrouding, cable duct is along terminal extension.

The concrete prefabricated element production method of L-type: L-type mould is kept flat operating board, cloth muscle, after will be numbered C35 and mix Solidifying soil is poured in L-type mould, by vibration, placement, initial set, form removal, maintenance, thus is made.

As shown in Figure 4: the cross section of traditional cable ditch is a U-shaped cross section, this utility model product is that 2 vertical sections are The concrete prefabricated element 1 of L-type, by staggered relatively for the concrete prefabricated element 1 of two L-types, pouring concrete behind middle gap And generate and be formed for a casting concrete structure 2, the concrete prefabricated element 1 of two L-types and a casting concrete structure Body 2 forms a U-shaped cable slot body 3.Again several sections of U-shaped cable slot body 3 splicings are formed for cable duct, adjacent U-shaped cable slot body 3 Connect with branch sleeve.

In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other The difference of embodiment, between each embodiment, identical similar portion sees mutually.Upper to the disclosed embodiments State bright, make professional and technical personnel in the field be capable of or use this utility model.Multiple amendment to these embodiments is right Will be apparent from for those skilled in the art, generic principles defined herein can be without departing from this reality In the case of novel spirit or scope, realize in other embodiments.Therefore, this utility model is not intended to be limited to this These embodiments shown in literary composition, and it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.

Claims (1)

1. The most prefabricated cable duct, it is characterised in that: two vertical sections are that the concrete prefabricated element of L-type is staggered relatively, two Connecting with casting concrete structure between the relative end face on the base of individual component, said two component and one pour coagulation Soil structured body forms a U-shaped cable slot body；More than one U-shaped cable slot body is spliced to form cable duct.