CN114874791B - Coke oven flue flip-chip construction method - Google Patents
Coke oven flue flip-chip construction method Download PDFInfo
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- CN114874791B CN114874791B CN202210598369.1A CN202210598369A CN114874791B CN 114874791 B CN114874791 B CN 114874791B CN 202210598369 A CN202210598369 A CN 202210598369A CN 114874791 B CN114874791 B CN 114874791B
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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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- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Conveying And Assembling Of Building Elements In Situ (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention relates to a construction method for inverted installation of a coke oven flue, which comprises the steps of firstly excavating a flue foundation and constructing a cushion layer; binding the bottom plate steel bars, installing the wall vertical steel bars, installing the templates after binding, and pouring bottom plate concrete; building a wall double-row scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the arch springing position; removing the inner wall template and the double-row scaffold, firstly building clay refractory bricks of the flue bottom plate, and then building the clay refractory bricks of the wall; setting up a full scaffold in the flue, adopting a wood template at the arch part, adopting a steel bar supporting member to support the lower part of the wood template, firstly building clay refractory bricks on the arch top, and then paving expanded perlite bricks after the building is completed; and after the arch is built, binding reinforcing 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 flip-chip 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 time of baking the coke oven to a great extent, a plurality of single projects such as a coke pusher rail, a coke guide rail and the like are arranged nearby the coke oven, and when a plurality of single projects are subjected to cross operation, the construction method brings serious examination to construction sites, construction sequences, construction periods and the like.
At present, the traditional coke oven flue construction sequence is: after the construction of the main body of the flue is finished, after the strength of the concrete at the top of the flue reaches 100%, the scaffold filled in the flue is removed, at the moment, the building material is lifted into the flue from the desulfurization and denitrification interface by a crane, then bricks are transported to all required parts of the flue, and then the building is started.
The construction method has the following defects: the method is characterized in that the method comprises the steps of excavating earthwork of a flue to the completion of the construction of the flue, wherein the time period required by the construction is long, the peripheral affiliated building construction, the passing of construction vehicles and the construction safety are influenced, materials required by the construction are hung in a crane from a desulfurization and denitrification interface and a flue turning plate hole, and after the materials are hung in from the hole, a large amount of manpower and material resources are required for carrying for the second time, so that the time and labor are wasted, and the construction speed is slow.
Disclosure of Invention
The invention aims to provide a coke oven flue flip-chip construction method which is beneficial to improving the construction efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the inverted construction method of the coke oven flue comprises flue main structure construction and flue lining brick construction, wherein the flue main structure construction comprises reinforcing steel bars, templates and concrete construction of a bottom plate, a wall and a top plate, and the flue lining brick construction comprises the construction of the bottom plate, the construction of the wall and the construction of a vault. The method comprises the following steps:
firstly, excavating a flue foundation, and constructing a cushion layer;
binding the bottom plate steel bars, installing the vertical wall steel bars, installing the templates after binding, and pouring bottom plate concrete;
step three, building a wall double-row scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the arch springing position;
removing the wall inner template and the double-row scaffold, firstly building clay refractory bricks of the flue bottom plate, and then building the wall clay refractory bricks;
fifthly, setting up a full scaffold in the flue, wherein the arch part adopts a wood template, the lower part of the wood template adopts a steel bar supporting member for supporting, clay refractory bricks on the arch roof are firstly built, and then the expanded perlite bricks are paved after the building is completed;
and step six, after the arch is built, binding reinforcing steel bars on the top of the flue, and then pouring concrete on the top plate.
And in the second step, after the cushion layer concrete is solidified, discharging the axis of the flue by using a theodolite and a control point, binding bottom plate steel bars, installing vertical steel bars of the wall, binding the bottom plate steel bars by adopting a binding lap joint, installing a template after the binding is qualified after experience collection, pouring the bottom plate concrete after the template is qualified after the template is inspected, pouring the concrete to the position of 500mm of the flue wall, and embedding a water stop steel plate at the position of a horizontal construction joint.
And in the third step, when concrete is poured to the crossing position of the vertical wall of the flue and the flue arch, a water stop steel plate is installed.
Further, in step four, the expanded perlite is filled between the clay refractory brick layer and the inside surface of the concrete.
In the fifth step, the scaffold assembly dismantled from the outer wall is hoisted into the flue through a crane and is used for erecting a full-hall scaffold.
In the fifth step, when the arch is built, the arch feet are symmetrically arranged from two sides to the center at the same time, and the radial seam of the arch brick is matched with the radius direction of the arch crown.
In the sixth step, the casting sequence is edge-first and edge-later, the casting speed is controlled to be 60 m/h, and the plastic film is covered for maintenance within 12 hours after casting is finished
Further, when the concrete strength reaches 100%, the full-hall scaffold and the formwork support members are removed.
Compared with the existing construction method, the method has the following beneficial effects:
by adopting the construction method, the construction period of the flue can be shortened, and the cost is saved; the working efficiency of masonry workers can be improved, the working environment is improved, and the construction of the track and pipe gallery foundation around the coke oven is facilitated to be quickened.
The method plays a key role in the construction progress of masonry, and can ensure that a crane can cooperatively construct on the ground from mechanical hoisting to material dumping without carrying the material for the second time, thereby accelerating the construction speed and further completing the flue construction more quickly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic illustration of a primary flue wall after casting;
FIG. 2 is a schematic view of a main flue after roof construction;
fig. 3 is a schematic view of the main flue after roof casting.
In the figure, 1-backing plate, 2-transverse sweeping rod, 3-upright rod, 4-cross rod, 5-outer wall template, 6-inner wall template, 7-full scaffold, 8-supporting member, 9-clay refractory brick, 10-expanded perlite and 11-roof concrete.
Description of the embodiments
For a better understanding of the present invention, reference will be made to the following description of the invention taken in conjunction with the accompanying drawings and examples. In addition, features in the embodiments and examples of the present application may be combined with each other without conflict.
The invention provides a method for constructing a coke oven flue in an inverted mode, which comprises flue main body structure construction and flue lining brick construction, wherein the flue main body structure construction comprises reinforcing steel bars, templates and concrete construction of a bottom plate, a wall and a top plate, and the flue lining brick construction comprises the construction of the bottom plate, the construction of the wall and the construction of a vault; the construction method comprises the following steps:
firstly, excavating a flue foundation, and constructing a cushion layer;
binding the bottom plate steel bars, installing the vertical wall steel bars, installing the templates after binding, and pouring bottom plate concrete;
step three, building a wall double-row scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the arch springing position;
removing the wall inner template and the double-row scaffold, firstly building clay refractory bricks of the flue bottom plate, and then building the wall clay refractory bricks;
fifthly, setting up a full scaffold in the flue, wherein the arch part adopts a wood template, the lower part of the wood template adopts a steel bar supporting member for supporting, clay refractory bricks on the arch roof are firstly built, and then the expanded perlite bricks are paved after the building is completed;
and step six, after the arch is built, binding reinforcing steel bars on the top of the flue, and then pouring concrete on the top plate.
And (3) after the flue wall is subjected to concrete construction to the vault, removing the double-row scaffold and the inner side template of the flue.
According to the embodiment, the bottom plate and the wall are firstly concreted, the inner bottom plate and the wall are built after the inner flue template is removed, then the full scaffold and the vault supporting member are erected, the vault is built, and roof concrete is poured after the vault is built.
The method plays a key role in the construction progress of masonry, and can ensure that a crane can cooperatively construct on the ground from mechanical hoisting to material transfer without carrying the material for the second time, so that the construction speed is accelerated, the construction period of a flue is shortened, the cost is saved, the construction of the track and pipe gallery foundation around the coke oven is facilitated to be accelerated, and the coke oven is put into production in advance to play a certain role.
The technical scheme of the invention is further and clearly described below by taking a Thisense Ke-Barber 4X 65 hole and JNDX3-6.78m coke oven flue as an example.
The construction flow of this embodiment: the No. 4 coke oven main flue comprises earth excavation, cushion layer construction, bottom plate construction, double-row scaffold, wall construction, double-row scaffold, flue inner bottom plate and wall masonry, building a full-hall scaffold and installing a vault supporting member, vault masonry of clay refractory bricks, expanded perlite bricks and roof concrete construction.
Earthwork excavation
And measuring the central line according to the design size and the positioning coordinates of the drawing. And measuring the axis of each direction of the foundation according to the central line, performing protection work of each point, performing closed test after the measurement is finished, and checking by a supervision engineer after confirming the error.
After the on-site positioning line is checked, the external control pile should be timely made, and obvious mark is made to mark the pile number and axis number. The control pile is required to have reliable protection measures for repeated paying-off.
And (3) measuring and controlling elevation: according to elevation points provided by a construction unit, the elevation is led to a chimney of a construction site, a triangular symbol is made by red paint, and elevation numbers are written for later control of the elevation.
The elevation of the bottom of the flue of the engineering is-8 m, a hydraulic backhoe excavator is adopted to excavate in two layers, and a dump truck is matched with earthwork transportation. The first layer is excavated to-4.5 m, the second layer is excavated to the position 200mm away from the bottom elevation of the foundation mat layer, and the other parts are excavated manually. The excavated earthwork is transported to the appointed place of the owner by adopting a dump truck. When earth is excavated to be close to the bottom of the tank, a measurer needs to control the excavation depth, and piles with elevation are driven at the corners of the foundation tank every 3-5 m at the position 0.5m upwards from the bottom of the tank, so that overexcavation and less excavation are not needed. When the earth excavation is finished, the working face 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. in the process of excavation, the states of the groove wall and the side slope are checked at any time. According to the soil property change condition, the foundation pit support preparation is carried out so as to prevent collapse. The earthwork which cannot be excavated in the mechanical construction should be excavated at any time by matching with manpower, and the earthwork is transported to the working radius of the machinery by using a hand truck so as to be transported away by the machinery in time.
Cushion construction
After the earth excavation is finished, the earth investigation, supervision, design and owners are contacted in time to perform foundation trench inspection. And after the inspection of the grooves is qualified, installing a cushion layer template and pouring concrete.
Construction of bottom plate
After the cushion layer concrete is solidified, the axis of the flue is discharged by using a theodolite and a control point, then the bottom plate steel bars are bound, the vertical steel bars of the wall are installed, the bottom plate steel bars are bound and lapped, after the binding is completed and the experience is qualified, the template is installed, after the binding is inspected to be qualified, the bottom plate concrete is poured, the concrete is poured to the 500mm position of the wall of the flue, and a water stop steel plate is pre-buried at the horizontal construction joint.
Double-row scaffold
After the concrete pouring of the bottom plate is completed, a double-row wall fastener type scaffold is erected, as shown in fig. 1, the double-row scaffold consists 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 sweeping rod 2 and a transverse rod 4 are connected with the vertical rod 3, steel pipes are made of A48.3X3.5 mm steel pipes, 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, a scissor brace is erected every 6m, and the scaffold is used after the erection is completed and the experience is qualified.
Wall construction
After the wall scaffold is erected, installing wall horizontal steel bars, binding the wall horizontal steel bars with wall vertical steel bars to form a steel bar framework, using a drag hook to tie the inner layer steel bars and the outer layer steel bars, then installing wall templates (comprising an outer wall template 5 and an inner wall template 6), and pouring concrete after acceptance inspection is qualified. And pouring concrete to the crossing position of the vertical wall of the flue and the flue arch, installing a water stop steel plate, and making a hidden check record.
Demolishing double-row scaffold, flue inner bottom plate and wall masonry
After the flue bottom plate and the wall concrete are completely constructed, removing the wall inner template and the scaffold, brushing cold primer oil and hot asphalt on the part of the outer wall of the flue, which is contacted with soil, and backfilling and tamping the outer wall of the flue in a layered manner when the strength reaches more than 75%.
The flue is built by adopting a smooth building method, when the flue is built, an inner bottom plate and a clay brick layer on the inner side of a wall body are built, and then expanded perlite is filled between the clay brick layer and the inner side surface of concrete, so that the flue is full and tight. The expansion joints of the clay brick layer and the expanded perlite brick are staggered, the expansion joints are cleaned and then are filled with corrugated strawboard with the thickness of 5mm, and a layer of petroleum asphalt paper is paved between the sliding joint between the two expansion joints and between the sliding joint and the concrete.
Scaffold 7 and installation 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. Steel pipe, fastener etc. that the outer wall was demolishd use 25t crane to hang in the flue, set up the required fastener formula full hall scaffold frame at flue top of building, because the flue roof is the arch, arch position adopts the wood form, and arch form component adopts the manufacturing of phi 25 reinforcing bar, and scaffold frame vertical pole interval is 500mm x 500mm, and the step is 1200mm, and sweep the floor pole and put 200mm apart from, and the backing plate adopts thickness 50mm, wide 200mm, and length is 6000mm to lay, and interval 6m sets up a scissors brace, guarantees full hall frame stability.
Clay refractory brick 9 and expanded perlite brick 10 on top layer of masonry flue
The flue vault is composed of clay brick arch and expanded perlite arch, the arch is a half-round arch with 180 degrees, and the clay brick is built in a vertical mode.
Before the arch is built, the supporting member 8 is firstly supported, the supporting member 8 is supported firmly and correctly, and after being checked to be qualified, the arch can be built, and the checking key points are that: whether the components are firmly spliced with the full scaffold, whether reliable stability exists between the components, and whether the horizontal elevation of the components is consistent.
When the arch is built, the arch springing is symmetrically carried out from two sides to the center. The radial seam of the arch brick is matched with the radius direction of the arch crown. Otherwise, the dislocation or triangular seam is easy to occur. Before arch building, the joints should be arranged and checked, and the sizes of the brick joints should be controlled.
Roof concrete 11 construction
And after the flue is built, carrying out reinforcement binding on the top of the flue, and pouring concrete after the flue is qualified through supervision and acceptance, wherein the pouring sequence is edge-first and middle-second, the pouring speed is controlled to be 60m & lt/h & gt, a plastic film is covered for maintenance within 12 hours after the pouring is finished, and when the strength of the concrete reaches 100%, the scaffold and the template supporting member are removed, and the steel pipe, the fastener 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 30 days earlier than the traditional construction process, thereby indirectly accelerating the construction of the coke oven supporting facilities and saving 15 shifts of a crane.
The scope of the present invention is not limited to the above embodiments, but various modifications and alterations of the present invention will become apparent to those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The inverted construction method of the coke oven flue comprises flue main body structure construction and flue lining brick construction, wherein the flue main body structure construction comprises reinforcing steel bars, templates and concrete construction of a bottom plate, a wall and a top plate, and the flue lining brick construction comprises the construction of the bottom plate, the construction of the wall and the construction of a vault; the method is characterized by comprising the following steps of:
firstly, excavating a flue foundation, and constructing a cushion layer;
binding the bottom plate steel bars, installing the vertical wall steel bars, installing the templates after binding, and pouring bottom plate concrete;
step three, building a wall double-row scaffold outside the flue, installing wall horizontal steel bars, binding the wall horizontal steel bars and wall vertical steel bars to form a steel bar framework, installing a template, pouring wall concrete, and pouring to the arch springing position;
removing the wall inner template and the double-row scaffold, firstly building clay refractory bricks of the flue bottom plate, and then building the wall clay refractory bricks; the scaffold assembly dismantled by the outer wall is hung into the flue through a crane and is used for erecting a full scaffold;
fifthly, setting up a full scaffold in the flue, wherein the arch part adopts a wood template, the lower part of the wood template adopts a steel bar supporting member for supporting, clay refractory bricks on the arch roof are firstly built, and then the expanded perlite bricks are paved after the building is completed;
and step six, after the arch is built, binding reinforcing steel bars on the top of the flue, and then pouring concrete on the top plate.
2. The method according to claim 1, characterized in that: and secondly, after the cushion layer concrete is solidified, discharging the axis of the flue by using a theodolite and a control point, binding bottom plate steel bars, installing vertical steel bars of the wall, binding the bottom plate steel bars by adopting binding lap joint, installing a template after the binding is qualified after the experience is completed, pouring the bottom plate concrete after the test is qualified, pouring the concrete to the 500mm position of the flue wall, and embedding a water stop steel plate at the horizontal construction joint.
3. The method according to claim 1 or 2, characterized in that: and thirdly, installing a water stop steel plate when the concrete is poured to the crossing position of the vertical wall of the flue and the flue arch.
4. A method according to claim 3, characterized in that: and step four, filling expanded perlite between the clay refractory brick layer and the inner side surface of the concrete.
5. The method according to claim 1 or 4, characterized in that: and fifthly, when the arch is built, the arch feet at two sides are symmetrically arranged from the center at the same time, and the radial seams of the arch bricks are matched with the radius direction of the arch crown.
6. The method according to claim 5, wherein: and step six, the casting sequence is edge-first and edge-later, the casting speed is controlled to be 60 m/h, and the plastic film is covered for maintenance within 12 hours after casting is finished.
7. The method according to claim 6, wherein: and when the strength of the concrete reaches 100%, dismantling the full-hall scaffold and the formwork support members.
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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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| CN114874791A (en) | 2022-08-09 |
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