CN114874791A - Coke oven flue upside-down mounting construction method - Google Patents
Coke oven flue upside-down mounting construction method Download PDFInfo
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- CN114874791A CN114874791A CN202210598369.1A CN202210598369A CN114874791A CN 114874791 A CN114874791 A CN 114874791A CN 202210598369 A CN202210598369 A CN 202210598369A CN 114874791 A CN114874791 A CN 114874791A
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- flue
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
- C10B29/02—Brickwork, e.g. casings, linings, walls
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a coke oven flue inverted construction method, which comprises the steps of firstly excavating a flue foundation and constructing a cushion layer; binding bottom plate steel bars, installing wall vertical steel bars, installing templates and pouring bottom plate concrete after binding is finished; erecting a wall double-row scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and the wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the position of an arch springing; dismantling the wall inner template and the double-row scaffolds, firstly building the clay refractory bricks on the bottom plate of the flue, and then building the clay refractory bricks on the wall; erecting a full framing scaffold in the flue, adopting a wood template at the arch part, adopting a steel bar support member to support the lower part of the wood template, building clay refractory bricks at the arch crown, and laying expanded perlite bricks after building is finished; and after the vault is built, binding steel bars on the top of the flue, and then pouring concrete on the top plate. The invention can shorten the construction period of the flue and improve the working environment.
Description
Technical Field
The invention relates to the technical field of coke oven flue construction, in particular to a coke oven flue upside-down mounting construction method.
Background
The flue of the coke oven is an important device in the whole coke oven production system, the construction speed of the flue determines the morning and evening of the oven drying time of the coke oven to a great extent, a plurality of single projects such as coke pusher rails, coke guide rails and the like are arranged near the coke oven, and when a plurality of single projects are operated in a cross mode, the tests on construction sites, construction sequence, construction period and the like are severe.
At present, the construction sequence of the flue of the traditional coke oven is as follows: after the construction of the flue main body is completed, after the strength of the concrete on the top of the flue reaches 100%, the full framing scaffold in the flue is dismantled, at the moment, the building materials are hung into the flue from the desulfurization and denitrification interface by a crane, then the bricks are transported to all required parts of the flue, and then the building is started.
The disadvantages of the construction method are that: the construction method comprises the steps of excavating from the earth of the flue to building the flue, wherein the construction time period is long, the construction of peripheral auxiliary buildings, the passing of construction vehicles and the construction safety are affected, materials required by building need to be hoisted into the flue from a desulfurization and denitrification interface and a flue turnover plate opening by a crane, after the materials are hoisted into the flue from the opening, a large amount of manpower and material resources are needed for carrying for the second time, time and labor are wasted, and the construction speed is slow.
Disclosure of Invention
The invention aims to provide a coke oven flue inverted construction method which is beneficial to improving the construction efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
a coke oven flue inverted construction method comprises flue column structure construction and flue lining brick masonry, wherein flue main body structure construction comprises steel bars, templates and concrete construction of a bottom plate, a wall and a top plate, and flue lining brick masonry comprises bottom plate, wall and vault masonry. The method comprises the following steps:
firstly, excavating a flue foundation and constructing a cushion layer;
binding bottom plate steel bars, installing wall vertical steel bars, installing templates and pouring bottom plate concrete after binding is finished;
step three, erecting a double-row wall scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and the wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the position of an arch foot;
dismantling the inner wall template and the double-row scaffolds, firstly building the clay refractory bricks on the bottom plate of the flue, and then building the clay refractory bricks on the wall;
step five, erecting a full framing scaffold in the flue, wherein the arch part adopts a wood template, the lower part of the wood template is supported by a steel bar supporting member, the clay refractory bricks of the vault are firstly built, and after the building is finished, the expanded perlite bricks are laid;
and step six, after the vault is built, binding steel bars on the top of the flue, and then pouring concrete on the top plate.
Further, in the second step, after the bed course concrete solidifies, use theodolite and control point to emit the flue axis, then carry out bottom plate reinforcement, and carry out the vertical bar installation of wall, the bottom plate reinforcing bar adopts the ligature overlap joint, and the ligature is accomplished and is accepted qualified back, carries out the template installation, through examining qualified back, pours bottom plate concrete, and concrete placement to flue wall 500mm department to at the pre-buried stagnant water steel sheet of horizontal construction seam department.
And further, in the third step, when concrete is poured to the crossed position of the flue vertical wall and the flue arch, a water stop steel plate is installed.
And further, in the fourth step, expanded perlite is filled between the clayey refractory brick layer and the inner side surface of the concrete.
And further, in the fifth step, a scaffold component crane for removing the outer wall is hung in the flue and used for building a full hall scaffold.
Furthermore, in the fifth step, arch springing is symmetrically performed from two sides to the center simultaneously when the arch crown is built, and the radial seam of the arch brick is matched with the radius direction of the arch crown.
Further, in the sixth step, the pouring sequence is side-to-side and the pouring speed is controlled to be 60 m/h, and the plastic film is covered for maintenance within 12 hours after pouring is completed
And further, when the strength of the concrete reaches 100%, the full framing scaffold and the formwork supporting member are dismantled.
Compared with the prior construction method, the invention has the following beneficial effects:
by adopting the construction method, the construction period of the flue can be shortened, and the cost is saved; can improve the working efficiency of masonry workers, improve the working environment and is also beneficial to accelerating the construction of the rails and pipe gallery foundations around the coke oven.
The method plays a key role in the construction progress of masonry, the crane can perform construction on the ground in a matched manner from mechanical hoisting to material transferring, the material does not need to be carried for the second time, the construction speed is accelerated, and the construction of the flue can be completed quickly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a main flue wall after casting;
FIG. 2 is a schematic diagram of the top of the main flue after being constructed;
FIG. 3 is a schematic diagram of the top of the main flue after pouring.
In the figure, 1-base plate, 2-horizontal floor sweeping rod, 3-vertical rod, 4-cross rod, 5-external wall template, 6-internal wall template, 7-full hall scaffold, 8-supporting member, 9-clay refractory brick, 10-expanded perlite and 11-roof concrete.
Detailed Description
In order that those skilled in the art will better understand the present invention, a more complete and complete description of the present invention is provided below in conjunction with the accompanying drawings and embodiments. In addition, the features of the embodiments and examples in the present application may be combined with each other without conflict.
The coke oven flue inverted construction method provided by a typical embodiment of the invention comprises flue column structure construction and flue lining brick masonry, wherein the flue main body structure construction comprises steel bars, templates and concrete construction of a bottom plate, a wall and a top plate, and the flue lining brick masonry comprises bottom plate, wall and vault masonry; the construction method comprises the following steps:
firstly, excavating a flue foundation and constructing a cushion layer;
binding bottom plate steel bars, installing wall vertical steel bars, installing templates and pouring bottom plate concrete after binding is finished;
step three, erecting a double-row wall scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and the wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the position of an arch foot;
dismantling the inner wall template and the double-row scaffolds, firstly building the clay refractory bricks on the bottom plate of the flue, and then building the clay refractory bricks on the wall;
step five, erecting a full framing scaffold in the flue, wherein the arch part adopts a wood template, the lower part of the wood template is supported by a steel bar supporting member, the clay refractory bricks of the vault are firstly built, and after the building is finished, the expanded perlite bricks are laid;
and step six, after the vault is built, binding steel bars on the top of the flue, and then pouring concrete on the top plate.
And (4) dismantling the double-row scaffold and the inner side template of the flue after the concrete of the flue wall is constructed to the vault.
According to the embodiment, the bottom plate and the wall are cast firstly, the inner formwork of the flue is removed, then the bottom plate and the wall in the flue are built, then the full framing scaffold and the vault supporting member are erected, then the vault is built, and the top plate concrete is cast after the vault is built.
The method plays a key role in the construction progress of the building, the crane can perform construction on the ground in a matched manner from mechanical hoisting to material transferring, the material does not need to be carried for the second time, the construction speed is accelerated, the construction period of a flue is shortened, the cost is saved, the construction of the track and the pipe gallery foundation around the coke oven is accelerated, and the method plays a certain role in putting the coke oven into operation in advance.
The technical scheme claimed by the invention is further clearly and completely explained by taking an example of the Thisen Krupp 4 x 65 hole and a JNDX3-6.78m coke oven flue.
The construction flow of the embodiment is as follows: the method comprises the following steps of No. 4 coke oven main flue, earthwork excavation → cushion layer construction → bottom plate construction → double-row scaffold → wall construction → double-row scaffold dismantling, inner bottom plate and wall building of the flue → full hall scaffold erection and vault supporting member installation → vault building of clay refractory brick, expanded perlite brick laying → roof concrete construction.
Earth excavation
And measuring the center line according to the design size and the positioning coordinate of the drawing. And measuring the axes of the foundation in each direction according to the central line, performing protection work of each point position, performing closed inspection after the measurement is finished, and requesting a supervision engineer to review and confirm after the correctness is confirmed.
After the on-site positioning line is monitored and confirmed to be correct, the external guiding control pile is made in time, and an obvious mark is made to indicate the pile number and the axis number. The control pile needs to have reliable protection measures so as to be used when the control pile is repeatedly paid off.
And (3) measuring and controlling the elevation: according to the elevation point provided by a construction unit, the elevation is led to a chimney of a construction site, a triangular symbol is formed by red paint, the elevation number is written, and the elevation is controlled in the later period.
The elevation of the bottom of the engineering flue is-8 m, a hydraulic back-hoe excavator is adopted for excavating in two layers, and a dump truck is used for transporting in cooperation with earthwork. The first layer is excavated to-4.5 m, the second layer is excavated to a position which is 200mm away from the bottom elevation of the foundation mat layer, and other parts are excavated manually. The excavated earthwork is transported to a place designated by an owner by a dump truck. When the earthwork is excavated to be close to the bottom of the groove, a measurer needs to control the excavation depth, and at the position 0.5m above the bottom of the groove, a standard height pile is driven at the corner of the foundation groove every 3-5 m, so that over excavation and less excavation are avoided. When the earthwork excavation is finished, the working surface of the bottom of the foundation is not less than 1.5m, and the slope of the excavated slope is not less than 1: 1. and in the excavation process, the states of the groove wall and the side slope are checked at any time. According to the change condition of soil texture, the support preparation of the foundation pit is needed to be made so as to prevent collapse. The earthwork which can not be excavated in the mechanical construction needs to be excavated at any time by matching with the manual work, and the earthwork is transported to the working radius of the machine by a hand cart so as to be transported away by the machine in time.
Bedding construction
After the earthwork excavation is finished, the foundation trench inspection is carried out by timely contacting with land survey, supervision, design and owners. And after the groove is tested to be qualified, installing a cushion layer template and pouring concrete.
Floor construction
After the concrete of the cushion layer is solidified, a flue axis is emitted by using a theodolite and a control point, then bottom plate steel bars are bound, the vertical steel bars of the wall are installed, the bottom plate steel bars are bound and overlapped, after the binding is finished and qualified through acceptance check, template installation is carried out, after the binding is qualified through inspection, the bottom plate concrete is poured, the concrete is poured to the 500mm position of the flue wall, and a water stop steel plate is embedded in the position of a horizontal construction joint.
Erecting double-row scaffold
After the concrete pouring of the bottom plate is completed, the double-row wall fastener type scaffold is started to be erected, as shown in fig. 1, the double-row scaffold is composed of a scaffold on the inner side of the wall and a scaffold on the outer side of the wall, a base plate 1 is arranged at the bottom of a vertical rod 3 of the scaffold, a transverse floor sweeping rod 2 and a transverse rod 4 are connected with the vertical rod 3, the steel pipe is a48.3 x 3.5mm steel pipe, the transverse distance of the vertical rod 3 is 1.2m, the longitudinal distance is 1.5m, the step distance is 1.5m, the vertical rod 3 is 150mm away from the wall, one scissor support is erected every 6m, and the scaffold is erected and used after being qualified through inspection and acceptance.
Wall construction
After the wall scaffold is erected, wall horizontal steel bars are installed and bound with wall vertical steel bars to form a steel bar framework, the inner layer steel bars and the outer layer steel bars are tied by using a draw hook, then wall formworks (comprising an outer wall formwork 5 and an inner wall formwork 6) are installed, and concrete is poured after acceptance is qualified. Pouring concrete to the crossing position of the flue vertical wall and the flue arch, installing a water stop steel plate, and making a hidden inspection record.
Double-row dismantling scaffoldBottom plate and wall masonry in flue
After the flue bottom plate and the wall concrete are completely constructed, the wall inner formwork and the scaffold are dismantled, the part of the outer wall of the flue, which is in contact with the soil, is brushed with cold bottom oil for one time and hot asphalt for two times, and when the strength reaches over 75 percent, the outer part of the flue is backfilled in layers and tamped.
The flue is built by a sequential building method, wherein during building, an inner bottom plate and a clay brick layer on the inner side of a wall body are built firstly, and then expanded perlite is filled between the clay brick layer and the inner side surface of concrete to ensure the filling and the compaction of the clay brick layer and the inner side surface of the concrete. The expansion joints of the clay brick layer and the expanded perlite brick layer are staggered, the expansion joints are cleaned and then filled with wrinkled horse dung paper with the thickness of 5mm, and a layer of petroleum asphalt paper is laid between the sliding joint between the two expansion joints and between the sliding joint and the concrete.
Erecting full framing scaffold 7 and installing vault supporting structure
The total length of the flue is 98.765m, the top plate of the flue is poured for 2 times, and the position of the construction joint is arranged at the expansion joint of the flue. The steel pipes, fasteners and the like detached from the outer wall are hung in the flue by using a 25t crane, a fastener type full framing scaffold required by building the top of the flue is erected, the top plate of the flue is arched, the arched part is made of wood templates, arched template components are made of phi 25 steel bars, the distance between vertical rods of the scaffold is 500mm x 500mm, the step distance is 1200mm, the distance between ground sweeping rods is 200mm, the base plate is 50mm thick and 200mm wide, the length is 6000mm, and one cross brace is arranged at the interval of 6m to ensure the stability of the full framing scaffold.
Masonry of clay refractory bricks 9 on top layer of flue and laying of expanded perlite bricks 10
The vault of the flue consists of a clay brick arch and an expanded perlite arch, the arch is a 180-degree semicircular arch, and the clay brick is built in a vertical mode.
Before the vault is built by laying bricks or stones, prop up earlier and establish supporting member 8, supporting member 8 establishes must firmly, correct to through the inspection qualified back, just can build the vault by laying bricks or stones, the inspection is mainly: whether the component is firmly spliced with the full framing scaffold, whether reliable stability exists between the components, and whether the horizontal elevation of the component is consistent.
When the vault is built, the arch feet at two sides are simultaneously and symmetrically arranged towards the center. The radial seam of the arch brick is matched with the radius direction of the arch crown. Otherwise, malocclusion or triangular seams are likely to occur. Before arch building, the seams should be arranged and tested in a dry mode, and the size of the brick seams is controlled.
Roof concrete 11 construction
And (3) after the flue is built, binding steel bars on the top of the flue, pouring concrete after being qualified through supervision and acceptance, wherein the pouring sequence is in the first-edge and second-middle stage, the pouring speed is controlled at 60 m/h, the plastic film is covered within 12 hours after the pouring is finished for maintenance, when the concrete strength reaches 100%, the full framing and the formwork supporting members are dismantled, and the steel pipes, the fasteners and the like are lifted out from the desulfurization and denitrification interface and the flue flap valve.
Compared with the prior art, the construction period of the invention can be advanced by about 30 days compared with the traditional construction process, the construction of the coke oven supporting facilities is accelerated indirectly, and 15 machine shifts of a crane can be saved.
The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the invention should be included in the scope of the invention.
Claims (8)
1. A coke oven flue inverted construction method comprises flue column structure construction and flue lining brick masonry, wherein the flue main body structure construction comprises steel bars, templates and concrete construction of a bottom plate, a wall and a top plate, and the flue lining brick masonry comprises bottom plate, wall and vault masonry; the method is characterized by comprising the following steps:
firstly, excavating a flue foundation and constructing a cushion layer;
binding bottom plate steel bars, installing wall vertical steel bars, installing templates and pouring bottom plate concrete after binding is finished;
step three, erecting a double-row wall scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and the wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the position of an arch foot;
removing the wall internal template and the double-row scaffolds, building the clay refractory bricks on the bottom plate of the flue, and building the clay refractory bricks on the wall;
step five, erecting a full framing scaffold in the flue, wherein the arch part adopts a wood template, the lower part of the wood template is supported by a steel bar supporting member, the clay refractory bricks of the vault are firstly built, and after the building is finished, the expanded perlite bricks are laid;
and step six, after the vault is built, binding steel bars on the top of the flue, and then pouring concrete on the top plate.
2. The method of claim 1, wherein: and in the second step, after the cushion concrete is solidified, discharging a flue axis by using a theodolite and a control point, then binding bottom plate steel bars, installing wall vertical steel bars, binding and overlapping the bottom plate steel bars, installing templates after the binding is finished and accepted, pouring the bottom plate concrete after the examination is qualified, pouring the concrete to a 500mm position of the flue wall, and embedding a water stop steel plate at a horizontal construction joint.
3. The method according to claim 1 or 2, characterized in that: and in the third step, when concrete is poured to the crossed position of the flue vertical wall and the flue arch, a water stop steel plate is installed.
4. The method of claim 3, wherein: and step four, filling expanded perlite between the clay refractory brick layer and the inner side surface of the concrete.
5. The method of claim 4, wherein: and step five, hoisting the scaffold assembly crane for removing the outer wall into the flue for erecting a full hall scaffold.
6. The method according to claim 4 or 5, characterized in that: and step five, when the vault is built, arch feet on two sides are simultaneously and symmetrically arranged towards the center, and the radial seam of the arch brick is matched with the radius direction of the vault.
7. The method of claim 6, wherein: and sixthly, controlling the pouring speed at 60 m/h after the pouring sequence is carried out in the first-edge and second-middle modes, and covering the plastic film for curing within 12 hours after the pouring is finished.
8. The method of claim 7, wherein: and when the strength of the concrete reaches 100%, the full framing scaffold and the formwork supporting member are dismantled.
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| CN202210598369.1A CN114874791B (en) | 2022-05-30 | 2022-05-30 | Coke oven flue flip-chip construction method |
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| CN202210598369.1A CN114874791B (en) | 2022-05-30 | 2022-05-30 | Coke oven flue flip-chip construction method |
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| CN211595513U (en) * | 2019-12-31 | 2020-09-29 | 山西建筑工程集团有限公司 | Coke oven flue vault masonry device |
| CN216481056U (en) * | 2021-12-29 | 2022-05-10 | 中国二十二冶集团有限公司 | Flue elbow support frame capable of being repeatedly used |
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