CN104847377B - Manufacturing method of reinforced concrete pillars for mine roadways - Google Patents

Manufacturing method of reinforced concrete pillars for mine roadways Download PDF

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CN104847377B
CN104847377B CN201510285331.9A CN201510285331A CN104847377B CN 104847377 B CN104847377 B CN 104847377B CN 201510285331 A CN201510285331 A CN 201510285331A CN 104847377 B CN104847377 B CN 104847377B
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pillar
main
diameter
unit
changeover
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CN201510285331.9A
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CN104847377A (en
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王凯
郝兵元
姚建新
魏红
乔永凤
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山西工程技术学院
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Abstract

A manufacturing method of reinforced concrete pillars for mine roadways includes: designing and manufacturing a reinforced concrete pillar into a plurality of prefabricated members different in specification, including a base, a transitional segment, a main bearing segment and a main bearing roof-contact segment; the main bearing segment is composed of a plurality of segments; every two adjacent prefabricated members are in inserted connection through composite steel casings buried in the prefabricated members. The defects such that the pillars cast in place on a coal roadway is collapsed in the curing phase and the pillars heavy in weight and integrally cast on the ground are difficult to carry and erect are overcome; the pillars are imparted sufficient bearing strength, the ability of the pillars to adapt to roadway height, surrounding rock pressure and surrounding rock strength is comprehensively considered, a whole is broken into segments for separate manufacturing, and the pillars are high in strength and convenient to mount and demount, transport and erect.

Description

A kind of manufacture method for mine roadway steel reinforcement concrete pillar

Technical field

The present invention relates to a kind of manufacture method of mine roadway steel reinforcement concrete pillar, especially by reinforced concrete pillar design used Some prefabricated components of different size standard are processed into, including base, changeover portion, main carrying section and main carrying connect top section, wherein leading Carry section to be made up of some sections, one kind of knot between two adjacent sections is modular prefabricated, is inserted by burying steel primary and secondary sleeve pipe therein For mine laneway height, pressure from surrounding rock and Surrounding Rock Strength manufacture method of the change with the reinforced concrete pillar compared with strong adaptability.

Background technology

In the Bracing Process of existing mine laneway, need high intensity, low cost, disposable supporting structures to control Deformation of the surrounding rock in tunnel and destruction, reinforced concrete pillar possess these characteristics just.

Used by existing mine laneway, the manufacture method of ferroconcrete prop has two kinds:One kind is that scene is integrated poured, this The method of kind is completed by only needing to casting mold and Reinforced Concrete Materials, but the method has many drawbacks, and one is due to ore deposit Narrow space in roadway road, cast-in-site work are more difficult;Two is that pillar early strength made by cast is low, due to heavily stressed Deformation of the surrounding rock in tunnel speed is fast, collapses under pressure and lose a protective function in pillar is dried maintenance processes;Three is cast-in-site The cross section of post is usually to determine according to the pressure of top board, often because pillar cross-sectional area is not enough, is inserted under pressure from surrounding rock effect Enter Loose floor rock stratum and lose support action, if taking the method for increasing pillar cross-sectional area to solve this problem, can cause Cost of manufacture increases;Four is that casting mold is poor to head-room change adaptability, and pillar connects top effect on driving birds is not good.

Another kind of method is the integrated poured method in ground, and the making space of the method is wide, and pillar maintenance is dried abundant, carries Ability is strong, but the deficiency of most serious is that weight is big, and the handling, transport and down-hole to pillar are installed and cause great difficulty, It is difficult to overcome, labor strength is big in some environment, installs long in time limit, has had a strong impact on normally entering for coal mine excavation Journey.

In the prior art of open report, also fail to inquire the manufacture method about mine roadway steel reinforcement concrete pillar, Extensively should to meet in mine high stress and soft rock mine roadway supporting in the urgent need to designing a kind of new reinforced concrete pillar and being made The demand of high-strength steel-bar reinforced concrete pillar.

The content of the invention

The purpose of the present invention is for the height of concrete mine laneway, pressure from surrounding rock and Surrounding Rock Strength, there is provided a kind of to adapt to The stronger manufacture method for mine roadway steel reinforcement concrete pillar of property.

The above-mentioned purpose of the present invention is achieved through the following technical solutions.

A kind of manufacture method for mine roadway steel reinforcement concrete pillar, its described manufacture method are to follow these steps to carry out 's:

(One)Net section height X is designed according to tunnel, the general assembly height Y for mine roadway steel reinforcement concrete pillar is determined, The general assembly height Y of pillar is made to be equal to tunnel design net section height X;

(Two)The general assembly height Y is by a prop liner [1], a pillar changeover portion [2], the main carrying section of some section pillars [3] the main carrying of and one pillar connects top section [4] and constitutes;

(Three)The roof toad that every pillar is subjected to is gone out according to Pu Shi caving arch Theoretical Calculation:

In formula:LFor tunnel span, unit m;MFor head-room, unit m;φFor roof strata internal friction angle, unit degree;fFor the solid coefficient of back rock stratum;bAdjacent two posts centre-to-centre spacing when being the arrangement in tunnel, generally less than unit m, 4m;γFor the unit weight of roof strata, unit kN/m3λFor column strength design safety factor (DSF), 3~4 are typically taken;

(Four)Concrete grade and reinforcing bar proportioning parameter needed for selected reinforced concrete pillar processing, according to above-mentioned steps(Three)Institute Obtain reinforced concrete pillar and bear load, section [3] is carried by the pillar of reinforced concrete column strength check formula inverse reinforced concrete pillar is main And the main carrying of pillar connects the pillar cross section core space diameter on top section [4]d cor

In formula:NFor pillar bearing load, unitNf c For concrete axial compressive strength design load, N/mm2d cor To prop up Post cross section core space diameter, unit mm;Vertical muscle comprcssive strength design load, unit N/mm2f y Vertical muscle tensile strength design Value, unit N/mm2For the vertical muscle gross area, unit mm2For stirrup cross-sectional area, unit mm2SFor stirrup spacing, list Position mm;

(Five)By above-mentioned steps(Four)The main carrying section [3] of gained pillar and the main carrying of pillar connect the strut core on top section [4] Area's diameterd cor , calculate the main carrying section [3] of pillar and the main carrying of pillar connect the strut diameter on top section [4]D

In formula:aSkin thickness is protected for pillar, 25mm~30mm is typically taken;

(Six)According to roadway floor rock stratum than pressure and above-mentioned steps(Three)Middle gained reinforced concrete pillar bears loadometer and calculates The diameter of prop liner [1]d C

In formula:d C For prop liner diameter, unit mm2;Q is a column load, unit N;q c It is that roadway floor ratio is pressed, unit MPa;

(Seven)Work as above-mentioned steps(Six)Calculate gained prop liner [1] cross-sectional diameter and above-mentioned steps(Five)Calculate gained When main carrying section [3] the cross-sectional diameter difference of pillar is not less than 200mm, between the main carrying section [3] of prop liner [1] and pillar Pillar changeover portion [2], the strut diameter of pillar changeover portion [2] are setd G

(Eight)During reinforced concrete column production, cut in section [3] in prop liner [1], pillar changeover portion [2] and pillar main carrying The steel pipe of a length of 55mm is buried as main pipe [5] in face center, connects top section in changeover portion [2], main carrying section [3] and main carrying [4] the embedded length in lower section center is the steel pipe of 150mm as sub- pipe [6], and sub-set pipe protruded length 50mm, embedment are mixed Length 100mm in solidifying soil;

The main pipe internal diameter is not more than 4mm with sub- pipe external diameter difference;Steel primary and secondary casing wall thickness is not less than 3mm;

(Nine)Prefabricated prop liner [1], pillar changeover portion [2], the main carrying section [3] of pillar and the main carrying of pillar are connect into top Section [4] is transported in mine laneway, is laid according to design, by prop liner [1], pillar changeover portion [2], the main carrying section of pillar [3] connect and push up section [4] grafting installation successively with the main carrying of pillar, constitute overall mine roadway steel reinforcement concrete pillar.

In above-mentioned technical proposal, further additional technical feature is as follows.

The height of the prop liner is 200~250mm;The height of the pillar changeover portion is 200~250mm;The pillar The main height for carrying section is 300~350mm;It is 100mm, 150mm or 200mm that the main carrying of the pillar connects the height of top section.

Main weight≤the 80kg for carrying section segmentation prefabricating of the pillar.

The cross section of the reinforced concrete pillar be circular, rectangle and it is square in one kind.

Ratio≤3 of the cross-sectional diameter of the prop liner and the cross-sectional diameter of the pillar changeover portion:2.

Ratio≤3 of the cross-sectional diameter cross-sectional diameter for carrying section main with the pillar of the pillar changeover portion:2.

The ratio of the cross-sectional diameter that the carrying main with the pillar of the main cross-sectional diameter for carrying section of the pillar connects top section is 1:1。

During diameter difference≤the 200mm of prop liner carrying section main with the pillar, pillar changeover portion is not set.

Pillar general assembly height Y diameter ratio≤12 for carrying section main with pillar:1.

The prop liner(1), pillar changeover portion(2), the main carrying section of pillar(3)Carrying main with pillar connects top section(4)In advance The protection skin thickness of product takes 25mm~30mm.

A kind of manufacture method for mine roadway steel reinforcement concrete pillar that the invention described above is provided is realized, is to concrete ore deposit The height in roadway road, pressure from surrounding rock and Surrounding Rock Strength, a kind of adaptability of design it is stronger for mine roadway steel reinforcement concrete pillar Manufacture method, compared with the existing method for making pillar, its advantage and good effect embody a concentrated reflection of as follows.

The pillar that this method makes breaches the integrated poured structural modelss of traditional steel reinforced concrete pillar, overcomes mine laneway Cast-in-site pillar the maintenance stage collapse under pressure and ground it is integrated poured into pillar weight be difficult to greatly carrying install etc. it is not enough, On the basis of guaranteeing that pillar has enough bearing strengths, pillar is considered to head-room, pressure from surrounding rock and Surrounding Rock Strength Adaptability, break the whole up into parts, segmentation prefabricating so as to intensity it is high, the positive advantage such as be easy to load and unload, transport and install.

The prop liner that this method makes is designed and produced according to floor pressure ratio Air holder, it is to avoid occurred as pillar section is little Slotting bottom phenomenon;And using the steel primary and secondary sleeve pipe between pillar merogenesis, not only there is in assembling the effect of centralized positioning, and And make pillar possess certain anti-side to push away bending resistance, further increase the stability of pillar in application.

Description of the drawings

Fig. 1 is the overall structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 2 is the roadway support effect structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 3 is the base reinforcing bar configuration front view structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 4 is the base reinforcing bar configuration overlooking structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 5 is the changeover portion reinforcing bar configuration front view structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 6 is the changeover portion reinforcing bar configuration overlooking structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 7 is the main carrying section reinforcing bar configuration front view structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 8 is the main carrying section reinforcing bar configuration overlooking structure figure for mine roadway steel reinforcement concrete pillar that this method makes.

Fig. 9 is that the main carrying for mine roadway steel reinforcement concrete pillar that this method makes connects top section reinforcing bar configuration front view structure Figure.

Figure 10 is that the main carrying for mine roadway steel reinforcement concrete pillar that this method makes connects top section reinforcing bar configuration vertical view knot Composition.

In figure:1:Prop liner:2:Pillar changeover portion;3:The main carrying section of pillar;4:The main carrying of pillar connects top section;5:Steel Main pipe;6:Steel pipe;7:Carrying handle;8:Vertical muscle;9:Stirrup;10:Anchor pole;11:Anchor cable;12:Lane side;13:Roadway floor; 14:Back;15:Reinforced concrete pillar.

Specific embodiment

Below the specific embodiment of the present invention is described in further detail.

Implement a kind of manufacture method for mine roadway steel reinforcement concrete pillar that the invention described above is provided, its manufacture method Step is as follows.

Step one, the net section height X designed according to mine laneway, and determine for mine roadway steel reinforcement concrete pillar General assembly height Y, makes mine roadway steel reinforcement concrete pillar general assembly height Y equal with the height X that mine laneway designs net section, i.e. X=Y.

Step 2, the pillar described in above-mentioned steps one is broken the whole up into parts, Design and Machining is some segment standard prefabricated components, standard Prefabricated component is to connect top section 4 by prop liner 1, the main carrying section 3 of pillar changeover portion 2, pillar and the main carrying of pillar to constitute.

Step 3, according to the general assembly design height Y of mine roadway steel reinforcement concrete pillar, by the pillar master described in above-mentioned steps two It is some section Design and Machining to carry 3 points of section, and regarding tunnel actual height and segmentation prefabricating part weight, every merogenesis is not more than merogenesis number again 80kg and make.

Step 4, the roof toad that every pillar is subjected to is gone out according to mining Pu Shi caving archs Theoretical CalculationQ

In formula:LFor tunnel span, unit m;MFor head-room, unit m;For roof strata internal friction angle, unit degree; f For the solid coefficient of back rock stratum;bAdjacent two posts centre-to-centre spacing when being the arrangement in tunnel, generally less than unit m, 4m;γFor the unit weight of roof strata, unit kN/m3;For column strength design safety factor (DSF), 3~4 are typically taken.

Step 5, the label and the proportioning parameter of reinforcing bar of selecting concrete needed for the processing of reinforced concrete pillar, are to reduce pillar The cross-sectional area of modular prefabricated weight and reduction pillar, is typically not less than C40 from concrete label.

Step 6, the label that the concrete that load and above-mentioned steps five determine is born according to four gained pillar of above-mentioned steps and The proportioning parameter of reinforcing bar, then go out by reinforced concrete column strength check formula inverse that reinforced concrete pillar is main to be carried section 3 and pillar master and hold Load connects the core space diameter of top 4 cross section of section:

In formula:NFor pillar bearing load, unitNf c For concrete axial compressive strength design load, unit N/mm2 d cor For strut core area diameter, unit mm;Vertical muscle comprcssive strength design load, unit N/mm2 f y Vertical muscle tensile strength design Value, unit N/mm2For the vertical muscle gross area, unit mm2For stirrup cross-sectional area, unit mm2SFor stirrup spacing, list Position mm.

Step 7, section 3 is carried and the main carrying of pillar connects the core cross section of top section 4 by above-mentioned steps six gained pillars is main Diameter, calculates the main carrying section 3 of reinforced concrete pillar and the main carrying of pillar connects the diameter of the cross section for pushing up section 4D

In formula:aSkin thickness is protected for pillar, 25mm~30mm is typically taken.

Step 8, the reinforced concrete pillar according to obtained by roadway floor rock stratum ratio pressure with above-mentioned steps four bear loadometer and calculate The diameter of prop liner 1d C

In formula: d C For prop liner diameter, unit mm2;Q is a column load, unit N;q c It is that roadway floor ratio is pressed, unit MPa。

Step 9, calculate when cross-sectional diameter and above-mentioned steps seven that above-mentioned steps eight calculate gained prop liner 1 obtained by During the cross-sectional diameter difference≤200mm of the main carrying section 3 of pillar, it is necessary to set between the main carrying section 3 of prop liner 1 and pillar and prop up Post changeover portion 2, the diameter of pillar changeover portion 2d G

When step 10, pillar are processed, in the main carrying 3 upper section centre bit of section of prop liner 1, pillar changeover portion 2 and pillar The steel pipe of embedded a length of 55mm is put as main pipe 5, top section 4 is connect in the main carrying section 3 of pillar changeover portion 2, pillar and the main carrying of pillar The embedded length in lower section center is the steel pipe of 150mm as sub- pipe 6, sub-set pipe protruded length 50mm, embedment coagulation Length 100mm in native;The main pipe internal diameter is not more than 4mm with sub- pipe external diameter difference;Steel primary and secondary casing wall thickness is not less than 3mm.

Step 11, cast concrete before, with metal foil belt by described in step 10 5 upper and lower opening of steel main pipe seal Close, forbid concrete to enter wherein.

When step 12, pillar fabrication and processing, in the corresponding two vertical flaccidities of tendon and muscle of a certain diameter of each section of pillar to center It is respectively welded a long 100mm, 1.2 inch(φ32mm)Steel pipe, as carrying handle 7.

Step 13, section 3 is carried and pillar master holds by above-mentioned prefabricated prop liner 1, pillar changeover portion 2, pillar main Load connects top section 4 and is transported in mine laneway, is laid according to design, by prop liner 1, the main carrying section 3 of pillar changeover portion 2, pillar Carrying main with pillar connects top section 4, and grafting is installed successively, constitutes overall mine roadway steel reinforcement concrete pillar.

In above-mentioned specific embodiment, the general height using prop liner 1 is 200~250mm, using pillar transition The height of section 2 is 200~250mm, is 300~350mm using the main height for carrying section 3 of pillar;Top section 4 is connect using the main carrying of pillar Height is 100mm, 150mm or 200mm.In concrete making,

In≤80kg, in order to load and unload transport, reinforced concrete is propped up the general Weight control by pillar main carrying 3 segmentation prefabricating of section The cross section of post can make circular, it is also possible to make rectangular, and in squarely can also be made according to practical situation Kind.After completing, generally, the cross-sectional diameter of the prop liner 1 of making is transversal with the pillar changeover portion 2 Face diameter ratio is≤3:2;The cross-sectional diameter cross section for carrying section 3 main with the pillar of the pillar changeover portion 2 of making is straight The ratio in footpath is also≤3:2;The main cross-sectional diameter for carrying section 3 of the pillar carrying main with the pillar of making connects the transversal of top section 4 Face diameter ratio is 1:1.If

During diameter difference≤the 200mm of made prop liner 1 carrying section 3 main with the pillar, it is not necessary to which pillar is set Changeover portion 2, and made pillar general assembly height Y diameter ratio≤12 for carrying section 3 main with pillar:1.Require simultaneously made The main carrying section 3 of the prop liner 1 of work, pillar changeover portion 2, pillar and the main carrying of pillar connect the prefabricated component of top section 4 and protect outer skin depth Spend for 25mm~30mm, to meet the reliability of pillar.

The specific embodiment of the present invention is further described in detail below by specific embodiment.

As described in accompanying drawing 1-10, helped as 8.1m thickness mud stone, two with a top board and base plate is coal body, length × wide=4m× 2.2mTunnel as a example by, implement a kind of manufacture method for mine roadway steel reinforcement concrete pillar, its manufacture method step is as follows.

Step one, according to tunnel net section height X=2.2m, determine pillar general assembly heightY=X=22000mm

Step 2, the height of prop liner 1 are 250mm, and the height of pillar changeover portion 2 is 250mm, and pillar is main to carry section 3 Height be 1500mm, be divided into 5 sections, often save height 300mm, pillar it is main carrying connect top section 4 height be 200mm.

It is step 3, theoretical according to Pu Shi caving archs, each parameter substitution formula is calculated into the top board that every pillar is subjected to Load:

In formulaLFor span length, 4m;MFor head-room, 2.2m;Roof mudstone solid coefficientf =1.3;Roof mudstone Internal friction angle;B is concrete pillar spacing, takes 2.4m;γ is roof strata unit weight, safety coefficient λ Take 3.

Step 4, to mitigate each merogenesis weight, poured into a mould from C40 concrete, vertical muscle selects HRB335Spiral, Stirrup is selectedRegular reinforcement.

Step 5, the configuration of section reinforcing bar is carried if accompanying drawing 7 is with shown in accompanying drawing 8 for mine roadway steel reinforcement concrete pillar is main, look into《Steel Reinforced concrete design specification》:

Calculate:The vertical muscle gross area is, stirrup cross-sectional area is, between stirrup Away from for, pillar bearing load, each parameter substitution formula is calculated:

Main protection skin thickness a for carrying section 3 of step 6, reinforced concrete pillar takes 25mm, then:

So, it is 300mm that reality determines that the main carrying section 3 of reinforced concrete pillar and main carrying connect the cross-sectional diameter of top section 4.Its Often saving weight is:

Step 7, by on-the-spot test roadway floor than press, calculate the diameter of prop liner 1:

Therefore, prop liner 1 obtains that diameter is actual takes 600mm.According to accompanying drawing 3 and the steel of 4 configuration reinforcement prop liner 1 of accompanying drawing Muscle, protection skin thickness take 25mm.

Step 8, according to the diameter of main diameter and the prop liner 1 for carrying section 3 of pillar, calculating pillar changeover portion 2 it is straight Footpath:

Pillar changeover portion 2 takes 25mm according to accompanying drawing 5 and 6 configuration reinforcement of accompanying drawing, protection skin thickness.

The diameter of prop liner 1 with the diameter ratio of pillar changeover portion 2 is, pillar changeover portion 2 It is main with pillar carry section 3 diameter ratio be

Step 9, to adapt to head-room change, by pillar main carrying connect the top height of section 4 be processed as respectively 200mm, Tri- kinds of specifications of 150mm and 100mm, are selected as needed.Its reinforcing bar configuration protects skin thickness as accompanying drawing 9 with shown in accompanying drawing 10 Take 25mm.

In step 10, steel primary and secondary sleeve pipe, main pipe selects 1.2 inch(φ32mm)Steel pipe, sub- pipe select 1 inch steel pipe(φ 25mm)Steel pipe.Before cast concrete, main pipe upper and lower opening is closed with metal foil belt, it is to avoid concrete is entered wherein.

The 1.2 inch steel pipes of step 11, carrying handle from φ 32mm.

Step 12, with the C40 concrete cast each merogenesis of prefabricated struts, be dried maintenance.

During pillar is installed, first base plate floating cash or float coal are understood totally, then according to order assembling installs pillar, The main carrying section of pillar is adjusted according to tunnel actual height and main carrying connects the number of top section, until closely connecing with back , such as there is the gap less than 10mm on top between pillar top and back, then should step up the back of the body using plank or timber wedge real.Installing During pillar must be kept vertical, be conducive to giving full play to the support action of pillar.Pillar installs effect as shown in Figure 2.

Claims (10)

1. a kind of manufacture method for mine roadway steel reinforcement concrete pillar, the manufacture method follow these steps to carry out:
(One)Net section height X is designed according to tunnel, the general assembly height Y for mine roadway steel reinforcement concrete pillar is determined, makes to prop up The general assembly height Y of post is equal to tunnel and designs net section height X;
(Two)The general assembly height Y is by a prop liner(1), a pillar changeover portion(2), some section main carrying sections of pillar(3) Carrying main with a pillar connects top section(4)Constitute;
(Three)The roof toad that every pillar is subjected to is gone out according to Pu Shi caving arch Theoretical Calculation:
In formula:LFor tunnel span, unit m;MFor head-room, unit m;φFor roof strata internal friction angle, unit degree; fFor The solid coefficient of back rock stratum;bAdjacent two posts centre-to-centre spacing when being the arrangement in tunnel, unit m, less than 4m;γFor top The unit weight of slate layer, unit kN/m3λFor column strength design safety factor (DSF), 3~4 are taken;
(Four)Concrete grade and reinforcing bar proportioning parameter needed for selected reinforced concrete pillar processing, according to above-mentioned steps(Three)Gained steel Muscle concrete pillar bears load, by the main carrying section of pillar of reinforced concrete column strength check formula inverse reinforced concrete pillar(3)And The main carrying of post connects top section(4)Pillar cross section core space diameterd cor
In formula:NFor pillar bearing load, unitNf c For concrete axial compressive strength design load, N/mm2d cor It is horizontal for pillar Kernel of section area diameter, unit mm;Vertical muscle comprcssive strength design load, unit N/mm2f y Vertical muscle tensile strength design load, it is single Position N/mm2For the vertical muscle gross area, unit mm2For stirrup cross-sectional area, unit mm2SFor stirrup spacing, unit mm;
(Five)By above-mentioned steps(Four)The main carrying section of gained pillar(3)And the main carrying of pillar connects top section(4)Pillar cross section core Heart district diameterd cor , calculate the main carrying section of pillar(3)And the main carrying of pillar connects top section(4)Strut diameterD
In formula:aSkin thickness is protected for pillar, 25mm~30mm is taken;
(Six)According to roadway floor rock stratum than pressure and above-mentioned steps(Three)Middle gained reinforced concrete pillar bears loadometer and calculates pillar Base(1)Diameterd C
In formula:d C For prop liner diameter, unit mm2;Q is a column load, unit N;q c It is that roadway floor ratio is pressed, units MPa;
(Seven)Work as above-mentioned steps(Six)Calculate gained prop liner(1)Diameter and above-mentioned steps(Five)Calculate the main carrying of gained pillar Section(3)When difference in diameter is not less than 200mm, in prop liner(1)With the main carrying section of pillar(3)Between arrange pillar changeover portion (2), pillar changeover portion(2)Strut diameterd G
(Eight)During reinforced concrete column production, in prop liner(1), pillar changeover portion(2)With the main carrying section of pillar(3)In upper section The steel pipe of a length of 55mm is buried as main pipe in heart position(5), in changeover portion(2), main carrying section(3)Top section is connect with main carrying(4) The embedded length in lower section center is the steel pipe of 150mm as sub- pipe(6), sub- pipe protruded length 50mm, Transducers Embedded in Concrete Interior length 100mm;
The main pipe internal diameter is not more than 4mm with sub- pipe external diameter difference;Steel primary and secondary casing wall thickness is not less than 3mm;
(Nine)By prefabricated prop liner(1), pillar changeover portion(2), the main carrying section of pillar(3)Carrying main with pillar connects top section (4)It is transported in mine laneway, is laid according to design, by prop liner(1), pillar changeover portion(2), the main carrying section of pillar(3) Carrying main with pillar connects top section(4)Grafting successively is installed, and constitutes overall mine roadway steel reinforcement concrete pillar.
2. manufacture method as claimed in claim 1, the prop liner(1)Height be 200~250mm;The pillar transition Section(2)Height be 200~250mm;The main carrying section of the pillar(3)Height be 300~350mm;The main carrying of the pillar connects top Section(4)Height be 100mm, 150mm or 200mm.
3. manufacture method as claimed in claim 1, the main carrying section of the pillar(3)Weight≤the 80kg of segmentation prefabricating.
4. manufacture method as claimed in claim 1, the cross section of the reinforced concrete pillar are the one kind in circular, rectangle.
5. manufacture method as claimed in claim 1, the prop liner(1)Cross-sectional diameter and the pillar changeover portion (2)Diameter ratio≤3:2.
6. manufacture method as claimed in claim 1, the pillar changeover portion(2)Diameter and the main carrying section of the pillar(3)'s Diameter ratio≤3:2.
7. manufacture method as claimed in claim 1, the main carrying section of the pillar(3)Diameter it is main with the pillar carrying connect top Section(4)Diameter ratio be 1:1.
8. manufacture method as claimed in claim 1, the prop liner(1)With the main carrying section of the pillar(3)Diameter difference During≤200mm, pillar changeover portion is not set(2).
9. manufacture method as claimed in claim 1, the pillar general assembly height Y and the main carrying section of pillar(3)Diameter ratio ≤12:1。
10. manufacture method as claimed in claim 1, the prop liner(1), pillar changeover portion(2), the main carrying section of pillar (3)Carrying main with pillar connects top section(4)The protection skin thickness of prefabricated component is 25mm~30mm.
CN201510285331.9A 2015-05-29 2015-05-29 Manufacturing method of reinforced concrete pillars for mine roadways CN104847377B (en)

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CN108595854B (en) * 2018-04-28 2019-11-05 天津市热电设计院有限公司 A kind of steel reinforcement cage calculation method of armored concrete anchor block

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