CN102383628B - Construction device and construction method for post construction of depressing cone of silo structure - Google Patents
Construction device and construction method for post construction of depressing cone of silo structure Download PDFInfo
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- CN102383628B CN102383628B CN 201110255069 CN201110255069A CN102383628B CN 102383628 B CN102383628 B CN 102383628B CN 201110255069 CN201110255069 CN 201110255069 CN 201110255069 A CN201110255069 A CN 201110255069A CN 102383628 B CN102383628 B CN 102383628B
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Abstract
The invention relates to a construction device and a construction method for post construction of a depressing cone of a silo structure. A built-in fitting is pre-built on the inner wall of the finished silo. A reservation hole is reserved on a central cone body. The construction device of the depressing cone comprises a high support formwork for providing a convenience for construction a formwork device and a casting device, wherein the formwork device and the casting device are used by being matched with each other. The construction device and the construction method for the post construction of the depressing cone of the silo structure have the advantages that concrete does not disintegrate in vibrating process and can be formed in limited space, quality of formed concrete is guaranteed, construction speed is fast, cross construction operation of multiple procedures can be carried out, total duration of a project is short, and the like. The construction device and the construction method for the post construction of the depressing cone of the silo structure can be widely applied to cast-in-site concrete construction of the depressing cone in cement plants.
Description
Technical field
The present invention relates to decompression cone construction equipment and job practices in a kind of cement factory building.
Background technology
Silo structure is the important structure in the cement factory building, it is because volume is large, the gradient is large, and be the high-altitude construction, in its concrete cast-in-situ construction, there is the execute-in-place complex process, the large construction period of practical operation difficulty is long, because heavy grade causes the construction Difficulties such as the easy segregation of concrete, therefore how using a kind of new technology simple, convenient can better faster more safely construction equipment be a useful problem.
Summary of the invention
The construction equipment and the job practices that the purpose of this invention is to provide a kind of post construction of depressing cone of silo structure will solve long construction period in the construction of existing silo structure decompression cone, and concrete is emanated easily, the technical problem that construction quality is difficult to guarantee.
For achieving the above object, the present invention adopts following technical scheme:
A kind of construction equipment of post construction of depressing cone of silo structure, described decompression cone is cast-in-place in completed silo, comprise and water first cone base ring beam, conical inner body and plain concrete cone point, it is described that to water first cone base ring beam cast-in-place on the outstanding bracket of completed silo inwall, described conical inner body and plain concrete are bored sharp segmentation and are built, be embedded with built-in fitting on the described completed silo inwall, be reserved with reserved opening on the described conical inner body, the construction equipment of described decompression cone is included as constructs the high-supported formwork that facilitates and the plate device that is used and builds device;
Described high-supported formwork comprise from water first cone base ring beam to the inner high-supported formwork of the cone of conical inner body layering setting, install and formerly water cone base ring top surface of the beam and water the hound that bottom, cone base ring soffit arranges to top, conical inner body bottom surface successively interval to the outside high-supported formwork of cone of plain concrete cone point with from first, described hound is from the inner high-supported formwork of the oblique cone of decompression cone;
Described plate device is for certainly watering first cone base ring soffit to the inner formword panel at top, conical inner body bottom surface successively subsection setup and certainly watering first cone base ring top surface of the beam to the plain concrete cone ogival successively exterior sheathing panel of subsection setup, pass through pull bar B drawknot between described inner formword panel and the exterior sheathing panel, pass through pull bar A drawknot between the described exterior sheathing panel, the outer interval of described exterior sheathing panel is provided with two steel tube frameworks, be lined with the flitch back cord between the described pair of steel tube framework, described flitch back cord and two steel tube framework enclose purlin by the hoop peripheral shroud, described inner formword panel is outside equipped with two steel tube frameworks, and described pair of steel tube framework is fixing by enclosing hoop in the hoop;
Describedly build the ground pump line that device comprises that ground pump and segmentation promotes, described ground pump line is connected with the ground pump, and pass from the reserved opening of conical inner body, hang on the built-in fitting on the completed silo, be promoted to piecemeal simultaneously the top of plain concrete cone point with setting up of the outside high-supported formwork of cone.
Enclosing hoop in the described hoop is that ring-like reinforcing bar and ring-like steel pipe interval are alternately arranged.
Described built-in fitting is pre-buried bar dowel or pre-buried crotch.
Describedly pull bar A is meter word at the same level face distributes.
Described watering first between cone base ring beam and the completed silo inwall separates by polystyrene board.
The inner high-supported formwork of described cone and the outside high-supported formwork of cone be vertical rod and cross bar in length and breadth colligation form, described vertical rod and cross bar length all change with the conical inner body gradient.
The method that construction equipment of the present invention is used for the construction of decompression cone is as follows:
At first, installing of high-supported formwork scaffold: backfill is tamped processed and build 200～300mmC20 plain concrete, support body bottom cushion block is general to adopt elongated channel-section steel to carry out place mat, and falsework arranges together cross horizontal reinforcing bar every 2 steps;
The operation layer passage completely spreads scaffold floor, and scaffold floor two is firm with the scaffold tube colligation with iron wire.Safe blanket net and horizon bar colligation are firm.
Secondly, the cone template construction: conical inner body inner and outer template panel adopts wooden form, establish pull bar between the inner and outer template panel, arrange together pull bar every 500mm in length and breadth along the cone hypotenuse, interior anti-rolling chock longitudinal direction adopts two steel pipe spacing 500mm to arrange that hoop adopts steel hoop and annular steel pipe spacing arranged crosswise; Outer anti-rolling chock longitudinal direction adopts two steel pipe spacing 500mm to arrange, hoop adopts steel hoop spacing 500mm to arrange, back cord adopts flitch, arrange along cone wall direction spacing 100mm, be fixed on inboard circumferential reinforcement and the steel pipe, the ring beam bottom arranges a hound every 500mm in length and breadth along the cone hypotenuse, and the cone wall bottom arranges a hound every 1000mm in length and breadth along the cone hypotenuse; Cone top solid section arranges 3 roads and connects pull bar, and per pass is M shape to pull bar to be arranged, and encloses purlin with 6 road reinforcing bars.
Then, concrete order: at first pour into a mould the ring beam concrete to the reserved opening position; Next builds the concrete of hole to be provided top cone wall, and the segmentation of cone concrete is built, and builds for every section highly to be 2m; Build at last vertex of a cone concrete.For guaranteeing support body stability, to build layering and carry out, every layer thickness is no more than 500mm, and the intermittent time is not more than 1 hour.Adopt ground pump pumping of concrete to the cone wall top, and then with tower crane handling concreting.The ground pump line is upward through the conical inner body reserved opening along frame column and fixedly picks out the flexible pipe discharging to watering first barrel built-in fitting place, cone base ring beam top along the frame column of cone base, and with tower crane handling concreting.Until water first cone base ring beam build complete after, whenever build one section cone wall concrete, the ground pump line is along the discharging of barrel rising corresponding height, and for the tower crane suspension bucket handling concrete that connects material, the ground pump line is fixed by the outside high-supported formwork of cone at the wooden discharging platform of flexible pipe arranged beneath.When building the concrete of cone wall, ring beam infall, make firm by ramming take artificial inside as main external vibration and be auxiliary coordinative construction, each perdurabgility of vibrating of shaking a little should be so that concrete be closely knit is as the criterion, and namely the surface presents laitance and concrete no longer sinks.Insert not yet 50～100mm in the concrete of initial set of lower floor when vibrating, make the abundant combination of levels, vibrator is inserted the displacement of point should not be greater than 1.5 times of its operating radius.Vibrator should be greater than 1/2 of its operating radius apart from template.Insert point mode and adopt alternating expression.
Concrete curing: immediately to the exposed surface maintenance of sprinkling water, curing time must not be less than 7 days to concrete after form removal, and the watering number of times is to keep the concrete surface wettability to be as the criterion.
At last, ring beam, cone wall concrete strength reach 100% rear stripping.
Compared with prior art the present invention has following characteristics and beneficial effect:
The present invention is by being reserved with reserved opening at conical inner body, can can carry out the inner high-supported formwork of cone after the construction of cone base ring beam is finished sets up, when guaranteeing concrete construction safety and quality, but also can accelerate speed of application, multinomial operation cross-operation construction, shorten total duration of engineering.
Owing to the restriction of inner formword panel and exterior sheathing panel, concrete can not produce segregation phenomenon in the process of vibrating, and makes concrete in limited space moulding, has guaranteed concrete Forming Quality during concreting of the present invention.
Construction equipment is simple in structure behind the decompression cone of the present invention, and it is convenient, safe to implement.
The present invention can be widely used in the decompression cone cast-in-place concrete construction in the cement factory building.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing.
Fig. 1 is template of the present invention and high trestle structural representation.
Fig. 2 is the A place detail drawing of Fig. 1.
The A-A sectional view of Fig. 3 Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 1.
Fig. 5 is the C-C sectional view of Fig. 1.
Fig. 6 builds the apparatus structure schematic diagram.
Fig. 7 is the schematic diagram that the ground pump line rises with the outside high-supported formwork of cone.
Fig. 8 is the schematic diagram that the ground pump line rises to plain concrete cone ogival.
The completed silo of Reference numeral: 1-, 1.1-bracket, the 2-cone that reduces pressure, 2.1-water first cone base ring beam, 2.2-conical inner body, 2.3-plain concrete cone point, the 3-reserved opening, the inner high-supported formwork of 4-cone, the outside high-supported formwork of 5-cone, the 6-built-in fitting, 7-ground don't be managed, 8-ground pump, 9-is to pull bar A, 10-is to pull bar B, 11-exterior sheathing panel, 12-inner formword panel, 13-hoop peripheral shroud, the two steel tube frameworks of 14-, 15-flitch back cord, enclose hoop in the 16-hoop, 16.1-circumferential reinforcement, 16.2-hoop steel pipe, the 17-hound, the 18-polystyrene board.
The specific embodiment
Embodiment is referring to shown in Figure 1, a kind of construction equipment of post construction of depressing cone of silo structure, it is 2 cast-in-place in completed silo 1 that described decompression is bored, comprise and water first cone base ring beam 2.1, conical inner body 2.2 and plain concrete cone point 2.3, it is described that to water first cone base ring beam 2.1 cast-in-place on the outstanding bracket 1.1 of completed silo 1 inwall, described conical inner body 2.2 and plain concrete are bored sharp 2.3 segmentations and are built, be embedded with built-in fitting 6 on described completed silo 1 inwall, be reserved with reserved opening 3 on the described conical inner body 2.2, the construction equipment of described decompression cone 2 is included as constructs the high-supported formwork that facilitates and the plate device that is used and builds device; Described high-supported formwork comprise from water first cone base ring beam 2.1 to the inner high-supported formwork 4 of the cone of conical inner body 2.2 layering settings, install and formerly water cone base ring top surface of the beam and water the hound 17 that bottom, cone base ring soffit arranges to top, conical inner body bottom surface successively interval to the outside high-supported formwork 5 of cone of plain concrete cone point 2.3 with from first, described hound 17 is from the inner high-supported formworks 4 of decompression cone 2 oblique cones;
Described plate device is referring to Fig. 2～Fig. 5, for certainly watering first cone base ring beam 2.1 bottom surfaces to the inner formword panel 12 at top, conical inner body 2.2 bottom surface successively subsection setup and certainly watering first cone base ring beam 2.1 end faces to plain concrete and bore the successively exterior sheathing panel 11 of subsection setup of sharp 2.3 tops, pass through pull bar B10 drawknot between described inner formword panel 12 and the exterior sheathing panel 11, pass through pull bar A9 drawknot between the described exterior sheathing panel 11, described exterior sheathing panel 11 outer intervals are provided with two steel tube frameworks 14, be lined with flitch back cord 15 between the described pair of steel tube framework 14, described flitch back cord 15 and two steel tube framework 14 enclose purlin by hoop peripheral shroud 13, described inner formword panel 11 is outside equipped with two steel tube frameworks 14, and described pair of steel tube framework 14 is fixing by enclosing hoop 16 in the hoop; Enclosing hoop 16 in the described hoop is that ring-like reinforcing bar 16.1 and ring-like steel pipe 16.2 intervals are alternately arranged.Describedly pull bar A9 is meter word at the same level face distributes.Described watering first between cone base ring beam 2.1 and completed silo 1 inwall separates by polystyrene board 18.The inner high-supported formwork 4 of described cone and the outside high-supported formwork 5 of cone be vertical rod and cross bar in length and breadth colligation form, described vertical rod and cross bar length all change with conical inner body 2.2 gradients.
The described device of building is referring to Fig. 6～Fig. 8, comprise the ground pump line 7 that ground pump 8 and segmentation promote, described ground pump line 7 is connected with ground pump 8, and pass from the reserved opening 3 of conical inner body, hang on the built-in fitting 6 on the completed silo 1, be promoted to piecemeal simultaneously the top of plain concrete cone point with setting up of the outside high-supported formwork 5 of cone.Described built-in fitting 6 is pre-buried bar dowel or pre-buried crotch.
Construction equipment of the present invention is used for the process of decompression cone construction:
At first, installing of high-supported formwork scaffold: produce differential settlement for preventing support body, backfill is tamped processed and build 200～300mmC20 plain concrete.The general employing of cushion block of support body bottom is elongated, and ［ the 14A channel-section steel carries out place mat.Falsework arranges together cross horizontal reinforcing bar every 2 steps; The operation layer passage must completely spread scaffold floor, and scaffold floor adopts wooden springboard, and two is firm with the scaffold tube colligation with iron wire.Safe blanket net is white, must be able to bear 100kg weight 10m HI high impact load.Blanket net arranges two-layer full the shop in cone, the colligation of same level bar is firm.
Secondly, the cone template construction: conical inner body inner and outer template panel adopts wooden form, establishes 14 pairs of pull bars of φ between the inner and outer template panel, arranges together pull bar every 500mm in length and breadth along the cone hypotenuse; Interior anti-rolling chock longitudinal direction adopts two steel pipe spacing 500mm to arrange that hoop adopts annular φ 25 reinforcing bars and annular steel pipe spacing 500mm arranged crosswise; Outer anti-rolling chock longitudinal direction adopts two steel pipe spacing 500mm to arrange, hoop adopts annular φ 25 rebar spacing 500mm to arrange; Back cord adopts the 50X100mm flitch, arranges along cone wall direction spacing 100mm, is fixed on inboard hoop φ 25 reinforcing bars and the steel pipe; The long 4m of hound, the ring beam bottom arranges a hound every 500mm in length and breadth along the cone hypotenuse, and the cone wall bottom arranges a hound every 1000mm in length and breadth along the cone hypotenuse; Cone top solid section arranges 3 roads and connects 14 pairs of pull bars of φ, and per pass is M shape to pull bar to be arranged, and encloses purlin with 6 road φ, 25 reinforcing bars, and joint location adopts the overlap joint double welding, and weld length is 200mm.
Then, concrete order: at first pour into a mould the ring beam concrete to the reserved opening position; Next builds the concrete of hole to be provided top cone wall, and the segmentation of cone concrete is built, and builds for every section highly to be 2m; Build at last vertex of a cone concrete.For guaranteeing support body stability, to build layering and carry out, every layer thickness is no more than 500mm, and the intermittent time is not more than 1 hour, avoids occurring cold seam.Adopt ground pump pumping of concrete to the cone wall top, and then with tower crane handling concreting.The ground pump line is upward through the conical inner body reserved opening along frame column and fixedly picks out the flexible pipe discharging to watering first barrel built-in fitting place, cone base ring beam top along the frame column of cone base, and with tower crane handling concreting.Until water first cone base ring beam build complete after, whenever build one section cone wall concrete, the ground pump line is along barrel rising corresponding height discharging (pump line is from barrel 200mm), for the tower crane suspension bucket handling concrete that connects material, the ground pump line is fixed by the outside high-supported formwork of cone at the wooden discharging platform of flexible pipe arranged beneath.When building the concrete of cone wall, ring beam infall, the invar muscle is intensive, concrete is difficult to build, according to circumstances in time process (on-the-spot two of the 30 type vibrating heads that are equipped with), make firm by ramming take artificial inside when vibrating as main external vibration and be auxiliary coordinative construction, each perdurabgility of vibrating of shaking a little should be so that concrete be closely knit is as the criterion, and namely the surface presents laitance and concrete no longer sinks.Should insert soon oblique 45 ° when vibrating dials slowly, the vertical insertion, and insert not yet 50～100mm in the concrete of initial set of lower floor, make the abundant combination of levels, vibrating spear tries not to touch template, reinforcing bar, built-in pipe and various built-in fitting, must not be attached on template and the reinforcing bar and vibrate, prevent from affecting the physical dimension of template and the strong bonded of concrete and rebar.The displacement of the slotting point of vibrator should not be greater than 1.5 times of its operating radius.Vibrator should be greater than 1/2 of its operating radius apart from template.Insert point mode and adopt alternating expression.Concrete curing: increase working load above forbidding within 24 hours after concreting is finished.Immediately to the exposed surface maintenance of sprinkling water, curing time must not be less than 7 days to concrete after form removal, and the watering number of times is to keep the concrete surface wettability to be as the criterion.
At last, form removable: after ring beam, cone wall concrete strength reach 100%, at first carry out reverse taper top portion ventilation facility before the dismounting reverse taper bed die.Must be passed to discharging platform during form removable and unify handling, forbid to toss downwards.Must be noted that during form removal that to building the protection of finished product particularly the concrete property at parts of edges and corners is forbidden to damage.
Claims (7)
1. the construction equipment of a post construction of depressing cone of silo structure, described decompression cone (2) is cast-in-place in completed silo (1), comprise and water first cone base ring beam (2.1), conical inner body (2.2) and plain concrete cone point (2.3), it is described that to water first cone base ring beam (2.1) cast-in-place on the outstanding bracket (1.1) of completed silo (1) inwall, described conical inner body (2.2) and (2.3) segmentation of plain concrete cone point are built, it is characterized in that: be embedded with built-in fitting (6) on described completed silo (1) inwall, be reserved with reserved opening (3) on the described conical inner body (2.2), the construction equipment of described decompression cone (2) is included as constructs the high-supported formwork that facilitates and the plate device that is used and builds device;
Described high-supported formwork comprises from watering first the inner high-supported formwork (4) of cone that cone base ring beam (2.1) to conical inner body (2.2) layering arranges, install and formerly water cone base ring top surface of the beam and water the hound (17) that bottom, cone base ring soffit arranges to top, conical inner body bottom surface successively interval to the outside high-supported formwork (5) of the cone of plain concrete cone point (2.3) with from first, described hound (17) the oblique cone of cone (2) inside high-supported formwork (4) that certainly reduce pressure;
Described plate device is for certainly watering first cone base ring beam (2.1) bottom surface to the inner formword panel (12) at conical inner body (2.2) top, bottom surface successively subsection setup and certainly watering first cone base ring beam (2.1) end face to sharp (2.3) top of the plain concrete cone successively exterior sheathing panel (11) of subsection setup, pass through pull bar B(10 between described inner formword panel (12) and the exterior sheathing panel (11)) drawknot, pass through pull bar A(9 between the described exterior sheathing panel (11)) drawknot, the outer interval of described exterior sheathing panel (11) is provided with two steel tube frameworks (14), be lined with flitch back cord (15) between the described pair of steel tube framework (14), described flitch back cord (15) and two steel tube framework (14) enclose purlin by hoop peripheral shroud (13), described inner formword panel (11) is outside equipped with two steel tube frameworks (14), and described pair of steel tube framework (14) is fixing by enclosing hoop (16) in the hoop;
Describedly build the ground pump line (7) that device comprises ground pump (8) and segmentation lifting, described ground pump line (7) is connected with ground pump (8), and pass from the reserved opening (3) of conical inner body, hang on the built-in fitting (6) on the completed silo (1), be promoted to piecemeal simultaneously the top of plain concrete cone point with setting up of the outside high-supported formwork of cone (5).
2. the construction equipment of post construction of depressing cone of silo structure according to claim 1 is characterized in that: enclose hoop (16) in the described hoop and be ring-like reinforcing bar (16.1) and ring-like steel pipe (16.2) interval layout alternately.
3. the construction equipment of post construction of depressing cone of silo structure according to claim 1, it is characterized in that: described built-in fitting (6) is pre-buried bar dowel or pre-buried crotch.
4. the construction equipment of post construction of depressing cone of silo structure according to claim 1 is characterized in that: described to pull bar A(9) be a meter word distribution at the same level face.
5. the construction equipment of post construction of depressing cone of silo structure according to claim 1 is characterized in that: described watering first between cone base ring beam (2.1) and completed silo (1) inwall separates by polystyrene board (18).
6. the construction equipment of post construction of depressing cone of silo structure according to claim 1, it is characterized in that: the inner high-supported formwork (4) of described cone and cone outside high-supported formwork (5) be vertical rod and cross bar in length and breadth colligation form, described vertical rod and cross bar length all change with conical inner body (2.2) gradient.
7. the job practices of a post construction of depressing cone of silo structure, application rights requires one of 1-6 described construction equipment, it is characterized in that the method for constructing is as follows:
At first, installing of high-supported formwork scaffold: backfill is tamped processed and build 200～300mmC20 plain concrete, support body bottom cushion block is general to adopt elongated channel-section steel to carry out place mat, and falsework arranges together cross horizontal reinforcing bar every 2 steps;
The operation layer passage completely spreads scaffold floor, and scaffold floor two is firm with the scaffold tube colligation with iron wire, and safe blanket net and horizon bar colligation are firm;
Secondly, the cone template construction: conical inner body inner and outer template panel adopts wooden form, establish pull bar between the inner and outer template panel, arrange together pull bar every 500mm in length and breadth along the cone hypotenuse, interior anti-rolling chock longitudinal direction adopts two steel pipe spacing 500mm to arrange that hoop adopts steel hoop and annular steel pipe spacing arranged crosswise; Outer anti-rolling chock longitudinal direction adopts two steel pipe spacing 500mm to arrange, hoop adopts steel hoop spacing 500mm to arrange, back cord adopts flitch, arrange along cone wall direction spacing 100mm, be fixed on inboard circumferential reinforcement and the steel pipe, the ring beam bottom arranges a hound every 500mm in length and breadth along the cone hypotenuse, and the cone wall bottom arranges a hound every 1000mm in length and breadth along the cone hypotenuse; Cone top solid section arranges 3 roads and connects pull bar, and per pass is M shape to pull bar to be arranged, and encloses purlin with 6 road reinforcing bars;
Then, concrete order: at first pour into a mould the ring beam concrete to the reserved opening position; Next builds the concrete of hole to be provided top cone wall, and the segmentation of cone concrete is built, and builds for every section highly to be 2m; Build at last vertex of a cone concrete, build layering and carry out, every layer thickness is no more than 500mm, and the intermittent time is not more than 1 hour; The ground pump line is upward through the conical inner body reserved opening along frame column and fixedly picks out the flexible pipe discharging to watering first barrel built-in fitting place, cone base ring beam top along the frame column of cone base, and with tower crane handling concreting;
Until water first cone base ring beam build complete after, whenever build one section cone wall concrete, the ground pump line is along the discharging of barrel rising corresponding height, and for the tower crane suspension bucket handling concrete that connects material, the ground pump line is fixed by the outside high-supported formwork of cone at the wooden discharging platform of flexible pipe arranged beneath;
When building the concrete of cone wall, ring beam infall, make firm by ramming take artificial inside as main external vibration and be auxiliary coordinative construction, each perdurabgility of vibrating of shaking a little should be so that concrete be closely knit is as the criterion, be that the surface presents laitance and concrete no longer sinks, insert not yet 50～100mm in the concrete of initial set of lower floor when vibrating, make the abundant combination of levels, vibrator is inserted the displacement of point should not be greater than 1.5 times of its operating radius, vibrator should greater than 1/2 of its operating radius, not inserted point mode and be adopted alternating expression apart from template;
Concrete curing: immediately to the exposed surface maintenance of sprinkling water, curing time must not be less than 7 days to concrete after form removal, and the watering number of times is to keep the concrete surface wettability to be as the criterion;
At last, ring beam, cone wall concrete strength reach 100% rear stripping.
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| CN 201110255069 CN102383628B (en) | 2011-08-31 | 2011-08-31 | Construction device and construction method for post construction of depressing cone of silo structure |
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| CN 201110255069 CN102383628B (en) | 2011-08-31 | 2011-08-31 | Construction device and construction method for post construction of depressing cone of silo structure |
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| CN108035594A (en) * | 2017-12-11 | 2018-05-15 | 中材建设有限公司 | The prefabricated decompression cone construction method of concrete silo structure |
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| CN111593890A (en) * | 2020-05-29 | 2020-08-28 | 上海宝冶建筑工程有限公司 | Method and device for pouring constructional column and ring beam |
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| CN101550722A (en) * | 2008-04-03 | 2009-10-07 | 上海市第七建筑有限公司 | Construction method for inverted conical shell structure |
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| JPH08135247A (en) * | 1994-11-11 | 1996-05-28 | Mitsui Constr Co Ltd | Placing form for hopper and construction method of hopper frame using the same |
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| CN105971281A (en) * | 2016-05-24 | 2016-09-28 | 中交第航务工程局有限公司 | Construction method of conical concrete roof on top of silo |
| CN105971281B (en) * | 2016-05-24 | 2019-06-04 | 中交第一航务工程局有限公司 | Silo top concrete taper roof construction method |
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| CN102383628A (en) | 2012-03-21 |
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