CN114293646A

CN114293646A - V-shaped filter tank in sewage treatment and pouring method thereof

Info

Publication number: CN114293646A
Application number: CN202111524147.7A
Authority: CN
Inventors: 杨生斌; 张发启; 王恒; 鲍莲才; 张晓宇
Original assignee: China National Chemical Engineering No14 Construction Co ltd
Current assignee: China National Chemical Engineering No14 Construction Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-08

Abstract

The invention provides a V-shaped filter tank in sewage treatment, which comprises a clean V-shaped filter tank, a production wastewater V-shaped filter tank, a production water tank and a pump room, wherein the clean V-shaped filter tank and the production wastewater V-shaped filter tank are overground uncovered water tanks; a V-shaped filter pool pouring method in sewage treatment comprises a filter pool construction process and a water production pool and pump room construction process. The invention can continuously adapt to the development of the chemical industry, adapt to the complex structure of the V-shaped filter, is beneficial to continuously summarizing the experience of various V-shaped filters and provides the experience for the same construction engineering in the future.

Description

V-shaped filter tank in sewage treatment and pouring method thereof

Technical Field

The invention relates to the technical field of casting of V-shaped filter tanks, in particular to a V-shaped filter tank in sewage treatment and a casting method thereof.

Background

The V-shaped filter tank is a quick filter tank, is named as a uniform-grain filter material filter tank (the filter material adopts a homogeneous filter material, namely a uniform-grain-diameter filter material) because the shape of a water inlet tank is V-shaped, adopts air-water backwashing, is increasingly applied in China at present, and is suitable for large and medium-sized water treatment projects. The structure comprises a water inlet system (a water inlet main channel, a water inlet branch channel and a V-shaped water inlet groove), a water outlet system (a clear water branch pipe, a water outlet weir, a clear water main pipe and the like), a drainage system, a water distribution system, a gas distribution system, a pool body and the like. The advantages are that homogeneous filtering material is used for filtering, some disadvantages possibly generated during filtering of graded filtering material are avoided, the dirt content of the filtering material layer is large, the water quality of the outlet water is good, the filtering period is long, the filtering speed is high, gas-water combined back flushing is adopted, the water consumption for flushing is small, the flushing effect is good, and automatic filtering and flushing are easy to realize.

The applicant has built a certain glycol project sewage zero discharge device building installation project, wherein the V-shaped filter chamber comprises a clean V-shaped filter chamber, a production wastewater V-shaped filter chamber, a water production tank and a pump room. The structure of the pool body is complex, and the construction precision and the construction quality have higher requirements, so that great difficulty is brought to the construction of civil engineering.

Disclosure of Invention

In order to solve the problems, the invention discloses a pouring method of a V-shaped filter tank in sewage treatment.

The specific scheme is as follows:

the V-shaped filter tank in sewage treatment is characterized by comprising a clean V-shaped filter tank, a production wastewater V-shaped filter tank, a production water tank and a pump room, wherein the production wastewater V-shaped filter tank belongs to a ground uncovered water tank, a walking road plate is arranged on the local part of the production wastewater V-shaped filter tank, the height of the tank wall is 4.9 meters, the overall size is 23.9 meters by 10.55 meters, and the production wastewater V-shaped filter tank comprises 3 independent V-shaped filter tanks. The clean V-shaped filter belongs to an overground uncovered water tank, a walking road plate is arranged on part of the clean V-shaped filter, the height of the wall of the filter is 4.9 meters, the overall size of the filter is 31.6 meters by 12.95 meters, and the filter comprises 4 independent V-shaped filters.

A V-shaped filter pool pouring method in sewage treatment is characterized by comprising a filter pool construction process and a water production pool and pump room construction process.

As a further improvement of the invention, the filter construction process sequentially comprises the following steps: construction preparation, site leveling, measurement lofting, foundation pit excavation, graded gravel backfilling, cushion concrete, bottom plate steel bars, bottom plate templates, bottom plate concrete, pool wall steel bars, pool wall templates, V-shaped groove steel bars, V-shaped groove templates, top plate steel bars, concrete pouring, concrete curing, template dismantling, inspection and acceptance.

As a further improvement of the invention, the construction process of the water producing pool and the pump room sequentially comprises the following steps: construction preparation, site leveling, measurement lofting, foundation pit excavation, graded gravel backfilling, cushion concrete, bottom plate reinforcing steel bars, bottom plate templates, bottom plate concrete, pool wall reinforcing steel bars, pool wall templates, top plate reinforcing steel bars, concrete pouring, concrete maintenance, template dismantling, inspection and acceptance.

As a further improvement of the invention, the construction preparation is to specifically organize professional technicians to carry out drawing review before construction, and introduce the structure and construction method of the pool to all technicians and construction teams through the broad reach model, so as to lay a solid foundation for subsequent construction.

As a further improvement of the invention, the measurement lofting specifically comprises the steps of setting two secondary control points according to the measurement of an elevation datum point, taking protective measures for the secondary control points, recording, reporting and supervising to organize a third party for rechecking, and taking the recheck as a later measurement lofting basis; and measuring coordinates of four corners of the filter according to the rechecked secondary control points, guiding the coordinates of the four corners to the outer side of the filter for protection, controlling the error within 2mm as the control points of the filter, rechecking the control points once every week, and ensuring that the elevations of the V-shaped grooves of the filters are consistent.

As a further improvement of the invention, the cushion concrete is specifically that the bottom of the sump pit is poured firstly, the pit wall and other parts are continuously poured when the concrete strength reaches the people-entering condition, the pit wall part is poured in a layered mode to prevent the mold expansion, and the layered thickness is not more than 500 mm.

As a further improvement of the invention, the reinforcing steel bars are bound according to the design requirements during the manufacturing of the reinforcing steel bars, and if the reinforcing steel bars conflict with the positions of the PVC pipes in the cleaning holes during the binding process, the reinforcing steel bars are staggered to ensure that the positions of the PVC pipes in the cleaning holes are unchanged, and because the concrete on the surface of the V-shaped groove plate is thin, concrete cracks caused by the fact that the reinforcing steel bar protective layer is too thin are easy to occur, so the thickness of the reinforcing steel bar protective layer must meet the design requirements. The steel reinforcement worker, the technician and the quality inspector carefully check whether the positions and the section sizes of the filter beam column, the V-shaped groove and the node, the axis and the elevation of the filter beam column on the pool wall are consistent with the design drawing according to the design drawing and the change, and determine that the reinforcement can be bound after the reinforcement is correct, wherein the reinforcement comprises the filter beam column reinforcement, the top plate reinforcement and the inclined plate face reinforcement of the V-shaped groove.

As a further improvement of the invention, the filter beam column reinforcing steel bars are manufactured as follows: the minimum section size of the filter beam and the filter column is only 140mm, the requirement on the accuracy of the position of the steel bar is high when the steel bar is bound, the accuracy of the position and the thickness of the protective layer are required to be ensured when the inserted steel bar is reserved, so the positioning lines of the filter column and the filter beam are popped up on the cushion layer, and the subsequent construction is carried out after the correctness is confirmed; when the filter column stirrups are bound, the number of each column stirrup is calculated according to the requirements of a drawing, the stirrups are firstly sleeved on the reserved steel bars of the bottom plate, then positioning steel bars and upright column steel bars are bound, and the distance lines between the stirrups are drawn by using the chalk lines on the vertical steel bars of the well-erected filter column according to the requirements of the drawing; binding and connecting stirrups: the joints (the superposed positions of the hooks) of the stirrups are arranged on the longitudinal reinforcements at the four corners in a staggered manner, the reinforcements at the column corners and the stirrups are firmly fastened by double buckles in a staggered manner, the binding buckles are mutually in a splayed shape, and the stirrups are perpendicular to the main reinforcements.

As a further improvement of the invention, the top plate steel bar is specifically manufactured as follows: firstly cleaning sundries on a template, snapping lines according to the intervals of the steel bars, firstly, transversely (facing a drawing paper) and then longitudinally paving the template, wherein one side of the binding method is sequentially buckled, staggered and bound, the lower layer steel bars of the template are divided into grade marks and are bound by the snapping lines, the steel bar supports are used for placing the lower layer steel bars which are perpendicular to the top plate gluten, the interval between the two supports is 2m, the upper layer steel bars of the template are bound by pull-through lines, the joint form of the top plate steel bars adopts a lap joint, the welding joint of the same section is less than 50%, the joint dislocation distance is more than 35D and is not less than 50cm, in order to ensure that the thickness of a steel bar protection layer on the surface of the template is uniform, the lower layer steel bars are provided with cushion blocks with the thickness of 25mm, the interval is arranged in a quincunx shape, scaffold boards are paved on the template, so as to prevent uneven intervals, bending and out-of-control of effective height of the steel bars caused by treading in the concrete pouring process after the whole top plate steel bars are finished, and a channel is built on the top plate by adopting a steel bar support and a scaffold board, so that the steel bar is not damaged when concrete is poured.

As a further improvement of the invention, the manufacturing of the steel bars on the surface of the inclined plate of the V-shaped groove is as follows: v type groove thickness is 150mm, the design is double-deck two-way reinforcing bar, for guaranteeing reinforcing bar position and protective layer thickness during reinforcement, ligature swash plate reinforcing bar after the die block installation is accomplished, with finished product mortar cushion ligature in the two-layer reinforcing bar outside, interval 1m quincunx is arranged, and set up the reinforcing bar spike in the middle of two-layer reinforcing bar, if the reinforcing bar conflicts with sweeping hole PVC pipe position, should stagger the reinforcing bar among the ligature process, guarantee PVC pipe position unchangeable, because of V type frid face concrete is thinner, the concrete crack that leads to by the protective layer of steel bar is appeared easily, so protective layer of steel bar thickness must satisfy the designing requirement.

As a further improvement of the invention, before the template is installed, sundries are removed, a positioning embedded part of the template is welded or trimmed, measurement and paying-off work is well done, and leveling mortar under the template is well smeared.

As a further improvement of the invention, a special template support scheme is compiled before the pool wall template is installed, sample software is adopted for checking calculation, according to the checking calculation result, a 15mm thick multilayer board panel, a 50 multiplied by 100mm square wood is adopted for vertical corrugation, a phi 48 multiplied by 3.5mm frame pipe is adopted for transverse corrugation, and a phi 10mm @450mm diagonal support is adopted for reinforcing the pulling water stop bolt and the steel pipe. Before the wall mold is installed, the connecting position of the pool wall is roughened, sundries in the wall are removed by an air compressor, and the measurement and paying-off work is carried out. In order to prevent the root of the wall form from leaking slurry and rotten root, before the wall form is installed, sponge strips are pasted on the bottom plate according to the paying-off size, so that the installation quality of the through-wall bolt is smooth, accurate, firm in bonding and capable of being noticed.

As a further improvement of the invention, the pool column template is an integral template made of 15mm thick multilayer boards, and the vertical ridges are 50 multiplied by 100mm square timbers, wherein one square formwork is arranged every 15 cm. The column hoops are made of phi 48 multiplied by 3.5mm steel pipes, each column hoop is 400-600 mm long, and the distance between the bottom layer and the ground is 250 mm. The vertical seam between the plate and the plate is processed to be a tongue-and-groove type splice, and then a column hoop and a support system are added to fix the column. The support is rigidly supported by a frame pipe with the diameter of 48 multiplied by 3.5mm and is connected with other columns into a whole.

As a further improvement of the invention, the top plate template adopts a 15 mm-thick multilayer plate. The main keel is made of 100 multiplied by 100mm @1000mm square wood, and the secondary keel is made of 50 multiplied by 100mm @200mm double-faced planed square wood. In order to ensure the integral concrete forming effect of the top plate, the multilayer plates of the whole top plate are tiled in the same sequence and in the same direction, keels are required to be arranged below seams, the seams are tight, and the surface has no wrong platform phenomenon. If the column head is intersected with the column, the column head is not hidden, a hole corresponding to the size of the column is sawn in the multi-layer board, and the square wood is used as a keel of the column head. Roof braced system is the red scaffold frame of full hall of formula of bowl knot formula, and the pole setting interval is 1000mm, and the horizon bar interval is 1200mm, supports all to adopt adjustable top to hold in the palm, and adjustable range is less than 300 mm.

The V-shaped groove bottom die supporting bent frame is erected by using welding steel pipes with the outer diameter of 48mm and the wall thickness of 3.5mm as supports, the fasteners are pig iron fasteners, and the quality of the V-shaped groove bottom die supporting bent frame meets the standard requirements of GB15831-1995 Steel pipe scaffold fastener. The distance between the vertical rods is 1.8m, the step distance between the cross rods is 1.5m, the vertical and horizontal floor sweeping rods are erected with the distance between the bottoms of the vertical and horizontal floor sweeping rods being 200mm, and the floor sweeping rods are lengthened in a butt joint mode.

As a further improvement of the invention, in the support of the bottom die of the V-shaped groove, 60X80 square timber is transversely adopted, and a @600 is arranged. When the formwork is supported, the lower end of the bottom formwork is aligned to a bottom leg line of a V-shaped groove which is bounced in advance, the bottom formwork is locally adjusted according to the angle of the V-shaped groove until the angle meets the design regulation, and in order to enable the joint between the hole sweeping PVC pipe and the bottom formwork to be tight, foam rubber is adopted to tightly plug the joint before concrete pouring. In order to ensure the one-step forming quality of the V-shaped groove and the tank wall, the joint between the V-shaped groove and the tank wall is tight, the joint is processed into a tongue-and-groove shape, and a sponge strip is stuck along the joint to prevent slurry leakage. And fixing the square timber along the top edge of the V-shaped groove according to the design height and the thickness of the inclined plate concrete, and controlling the elevation of the square timber by using a level meter.

As a further improvement of the invention, the cleaning hole PVC pipe is fixedly arranged, the cleaning hole PVC pipes are positioned one by one according to the design interval, the cleaning hole PVC pipe material adopts a phi 28 plastic PVC sleeve, and the cleaning hole PVC pipe is blanked according to the actual length on site because the flatness of the surface of the tank wall may be uneven, so that the cleaning hole PVC pipe is convenient to position, the wall plate can be taken to the length of the template, and the redundant part can be cut off after the template is removed. The PVC pipe of the cleaning hole is in the same horizontal state, the position close to the wall of the tank is fixed by small square wood of 15X20, the other end of the PVC pipe is fixed downwards by a wedge-shaped plate of 70X 30, one section of the template can be fixed by a concave-convex wedge-shaped template, and the wedge-shaped template is fixed on the template by iron nails.

As a further improvement of the invention, the concrete in the concrete pouring is conveyed to a preset pouring position by a conveying pump, the concrete pouring is arranged in the daytime as much as possible according to the arrangement of construction procedures and construction period, and when the concrete is poured, the concrete is poured to the position of 500mm (construction joint) of the pool wall for the first time, and the pool wall, the V-shaped groove and the top plate are poured at one time, specifically comprising bottom plate concrete pouring, pillar pool wall concrete pouring, V-shaped groove concrete pouring and top plate concrete pouring.

As a further improvement of the invention, the concrete pouring of the bottom plate adopts an automobile pump pouring mode, and in order to ensure the integrity of the bottom plate, the concrete is continuously poured once without leaving a vertical construction joint; roughening the root of the pillar after pouring; the concrete with the lower part of the pool wall of 80 cm is required to be poured together with the bottom plate (the lifting mould is erected by a woodworker).

As a further improvement of the invention, the post pool wall concrete is filled with the same-proportion stone-removing mortar with the thickness of 30-50 mm before pouring. Concrete of the pillar and the pool wall is poured in layers, the concrete is vibrated in layers, the pouring thickness is 40 cm (50 vibrating rods are used) each time, and the pouring thickness is controlled by using a ruler rod and a handle lamp. The vibrating rod can not touch the reinforcing steel bars and the embedded pipe fittings, and people need to knock the template at any time to check whether the vibration is leaked or not except the vibration on the vibrating rod. When the pool wall is poured, one vibrating rod is placed every 6 meters, and the vibrating rod cannot be moved back and forth.

As a further improvement of the invention, the V-shaped groove concrete pouring is carried out after the concrete pouring of the tank wall is stopped for 1-1.5h after the concrete pouring reaches the bottom elevation of the V-shaped groove, because the section size is small, workers with better technique are arranged during vibration to carry out vibration, the vibration leakage is prevented, surface holes are inspected one by one after the concrete pouring, if the deviation occurred in the construction is found, the upwarped surface sweeping holes are corrected in time, and the upper surface of the V-shaped groove is subjected to secondary light collection before the concrete is initially set.

As a further improvement of the invention, the top plate concrete is poured after the pool wall and the beam are poured for 1h, pouring is carried out in sequence along the long edge direction, no construction joint is left, and a constructor stands on a channel erected in advance during pouring, so that a tread steel bar cannot be directly stepped on; and after pouring, performing secondary plastering before initial setting, and finally covering a plastic film.

As a further improvement of the present invention, concrete placement and vibration are generally required: when the concrete of the pool wall is poured, pouring in layers, wherein the pouring thickness of each layer is not more than 500mm, and the upper layer of concrete is poured before the initial setting of the lower layer of concrete; in order to prevent the concrete from layering and segregation during concrete pouring, when the concrete is discharged from a pump pipe, the free pouring height of the concrete cannot exceed 2m, when the free pouring height of the concrete exceeds 2m, a chute is adopted to fall, the concrete cannot directly impact a template during concrete pouring, and before concrete of a vertical structure (a pool wall, a column and the like) is poured, a layer of cement mortar with the thickness of 30-50 mm and the same proportion is filled at the bottom of the concrete; when pouring, a special person is arranged to look at the formwork, the conditions of the formwork, the support, the reinforcing steel bar and the embedded sleeve are often observed, pouring is stopped immediately when deformation and displacement occur, and the concrete is well finished before initial setting; the quick-inserting and slow-pulling are required to be carried out by using the inserting type vibrating rod, inserting points are arranged in a quincunx shape in sequence, the moving distance cannot be omitted and is not more than 500mm, and the next layer of concrete is inserted for 50mm when the previous layer is vibrated so as to eliminate the seam between the two layers.

As a further improvement of the present invention, the removing of the formwork follows a removing sequence of "first support and then removing, then first removing, and then removing the non-bearing part and then removing the bearing part", and specifically includes: dismantling a pool wall column template, a top plate template and a V-shaped groove template.

As a further improvement of the invention, the pool wall column template is removed, and the pool wall column template can be removed after the concrete strength reaches 1.2MPa, so that the surface edges and corners of the pool wall column template are not damaged by removing the template. After the strength of the concrete of the test piece is cured under the same conditions and reaches 1.0MPa, the through-wall bolt is loosened, so that the template is separated from the wall body. When the demolding is difficult, a crowbar can be used for prying the bottom of the template, the template is strictly forbidden to be pried and shaken at the upper opening or pounded by a sledge hammer, and the demolished template can timely clean residues on the template and the lining mold.

As a further improvement of the method, the top plate template is removed, and the top plate template is removed according to a test report of the compressive strength of a test piece of the top plate concrete under the same conditions, and the test piece can be removed after the strength of the concrete reaches 75% of the designed strength. When the top plate template is dismantled, attention is paid to protecting the top plate template, and the seam of the template cannot be pried hard, so that the multilayer board is prevented from being damaged.

As a further improvement of the invention, the V-shaped groove template is disassembled, because the wall plate of the V-shaped groove is thin and has high strength requirement, the maintenance work should be followed day and night, the template can be disassembled when the strength of the concrete of the V-shaped groove reaches 100% of the designed strength, the wall of the V-shaped groove and the surface sweeping hole cannot be seriously collided during the template disassembly, and the template should be disassembled from top to bottom.

As a further improvement of the invention, the concrete is maintained in the later period: according to the local climate condition, after 12 hours of pouring and tamping, watering and curing are carried out, and water storage and curing can also be used, so that the poured and tamped concrete has enough hardening conditions, the phenomenon that the V-shaped groove generates drying and shrinking cracks due to water shortage is prevented, the strength requirement is high due to the thin wall plate of the V-shaped groove, the curing work needs to be followed by a specially-assigned person day and night, and the supervision is arranged. The curing time is not less than 14 days.

The invention has the beneficial effects that: the method can continuously adapt to the development of the chemical industry, adapts to the complex structure of the V-shaped filter, is beneficial to continuously summarizing the experience of various V-shaped filters and provides experience for the same engineering of construction in the future.

Detailed Description

The present invention will be further illustrated below with reference to specific embodiments, which are to be understood as merely illustrative and not limitative of the scope of the present invention.

The invention provides a V-shaped filter tank in sewage treatment, which comprises a clean V-shaped filter tank, a production wastewater V-shaped filter tank, a production water tank and a pump room, wherein the production wastewater V-shaped filter tank belongs to a ground uncovered water tank, a walking road plate is arranged at the local part of the production wastewater V-shaped filter tank, the height of the tank wall is 4.9 meters, the overall size is 23.9 meters by 10.55 meters, and the production wastewater V-shaped filter tank comprises 3 independent V-shaped filter tanks. The clean V-shaped filter belongs to an overground uncovered water tank, a walking road plate is arranged on part of the clean V-shaped filter, the height of the wall of the filter is 4.9 meters, the overall size of the filter is 31.6 meters by 12.95 meters, and the filter comprises 4 independent V-shaped filters.

The invention provides a V-shaped filter pouring method in sewage treatment, which comprises a filter construction process and a water production tank and pump room construction process.

In this embodiment, the filter construction process sequentially includes the following steps: construction preparation, site leveling, measurement lofting, foundation pit excavation, graded gravel backfilling, cushion concrete, bottom plate steel bars, bottom plate templates, bottom plate concrete, pool wall steel bars, pool wall templates, V-shaped groove steel bars, V-shaped groove templates, top plate steel bars, concrete pouring, concrete curing, template dismantling, inspection and acceptance.

In this embodiment, the construction process of the water producing tank and the pump room sequentially comprises the following steps: construction preparation, site leveling, measurement lofting, foundation pit excavation, graded gravel backfilling, cushion concrete, bottom plate reinforcing steel bars, bottom plate templates, bottom plate concrete, pool wall reinforcing steel bars, pool wall templates, top plate reinforcing steel bars, concrete pouring, concrete maintenance, template dismantling, inspection and acceptance.

In this embodiment, the construction preparation is specifically to organize professional technicians to review drawings before construction, and introduce the structure and construction method of the pool to all technicians and construction teams through the universal model, so as to lay a solid foundation for subsequent construction.

In this embodiment, the measurement lofting specifically includes setting two secondary control points according to the measurement of the elevation datum point, taking a protective measure for the secondary control points, making a record, reporting and supervising to organize a third-party recheck to serve as a basis for the subsequent measurement lofting; and measuring coordinates of four corners of the filter according to the rechecked secondary control points, guiding the coordinates of the four corners to the outer side of the filter for protection, controlling the error within 2mm as the control points of the filter, rechecking the control points once every week, and ensuring that the elevations of the V-shaped grooves of the filters are consistent.

In this embodiment, the cushion concrete is specifically cast at the bottom of the sump pit, the pit wall and other parts are continuously cast when the strength of the concrete reaches the above-mentioned condition, the pit wall parts are cast in layers to prevent the mold expansion, and the layering thickness is not more than 500 mm.

In this embodiment, according to the designing requirement ligature reinforcing bar during the reinforcing bar preparation, if the reinforcing bar conflicts with sweeping washing hole PVC pipe position in the ligature process, should stagger the reinforcing bar, guarantee to sweep washing hole PVC pipe position unchangeable, because of V type frid face concrete is thinner, the concrete crack that leads to by the reinforcing bar protective layer is too thin appears easily, so reinforcing bar protective layer thickness must satisfy the designing requirement. The steel reinforcement worker, the technician and the quality inspector carefully check whether the positions and the section sizes of the filter beam column, the V-shaped groove and the node, the axis and the elevation of the filter beam column on the pool wall are consistent with the design drawing according to the design drawing and the change, and determine that the reinforcement can be bound after the reinforcement is correct, wherein the reinforcement comprises the filter beam column reinforcement, the top plate reinforcement and the inclined plate face reinforcement of the V-shaped groove.

In this embodiment, the manufacture of the filter beam column steel bars is as follows: the minimum section size of the filter beam and the filter column is only 140mm, the requirement on the accuracy of the position of the steel bar is high when the steel bar is bound, the accuracy of the position and the thickness of the protective layer are required to be ensured when the inserted steel bar is reserved, so the positioning lines of the filter column and the filter beam are popped up on the cushion layer, and the subsequent construction is carried out after the correctness is confirmed; when the filter column stirrups are bound, the number of each column stirrup is calculated according to the requirements of a drawing, the stirrups are firstly sleeved on the reserved steel bars of the bottom plate, then positioning steel bars and upright column steel bars are bound, and the distance lines between the stirrups are drawn by using the chalk lines on the vertical steel bars of the well-erected filter column according to the requirements of the drawing; binding and connecting stirrups: the joints (the superposed positions of the hooks) of the stirrups are arranged on the longitudinal reinforcements at the four corners in a staggered manner, the reinforcements at the column corners and the stirrups are firmly fastened by double buckles in a staggered manner, the binding buckles are mutually in a splayed shape, and the stirrups are perpendicular to the main reinforcements.

In this embodiment, the top plate steel bar is specifically manufactured as follows: firstly cleaning sundries on a template, snapping lines according to the intervals of the steel bars, firstly, transversely (facing a drawing paper) and then longitudinally paving the template, wherein one side of the binding method is sequentially buckled, staggered and bound, the lower layer steel bars of the template are divided into grade marks and are bound by the snapping lines, the steel bar supports are used for placing the lower layer steel bars which are perpendicular to the top plate gluten, the interval between the two supports is 2m, the upper layer steel bars of the template are bound by pull-through lines, the joint form of the top plate steel bars adopts a lap joint, the welding joint of the same section is less than 50%, the joint dislocation distance is more than 35D and is not less than 50cm, in order to ensure that the thickness of a steel bar protection layer on the surface of the template is uniform, the lower layer steel bars are provided with cushion blocks with the thickness of 25mm, the interval is arranged in a quincunx shape, scaffold boards are paved on the template, so as to prevent uneven intervals, bending and out-of-control of effective height of the steel bars caused by treading in the concrete pouring process after the whole top plate steel bars are finished, and a channel is built on the top plate by adopting a steel bar support and a scaffold board, so that the steel bar is not damaged when concrete is poured.

In this embodiment, the manufacturing of the reinforcing steel bars on the surface of the inclined plate with the V-shaped grooves is as follows: v type groove thickness is 150mm, the design is double-deck two-way reinforcing bar, for guaranteeing reinforcing bar position and protective layer thickness during reinforcement, ligature swash plate reinforcing bar after the die block installation is accomplished, with finished product mortar cushion ligature in the two-layer reinforcing bar outside, interval 1m quincunx is arranged, and set up the reinforcing bar spike in the middle of two-layer reinforcing bar, if the reinforcing bar conflicts with sweeping hole PVC pipe position, should stagger the reinforcing bar among the ligature process, guarantee PVC pipe position unchangeable, because of V type frid face concrete is thinner, the concrete crack that leads to by the protective layer of steel bar is appeared easily, so protective layer of steel bar thickness must satisfy the designing requirement.

In this embodiment, before installing the formwork, to remove sundries, weld or trim the positioning embedded part of the formwork, make measurement and pay-off work, and wipe the leveling mortar under the formwork, including the installation of the formwork of the pool wall, the installation of the formwork of the pool column, the installation of the formwork of the top plate, the erection of the support bent of the bottom formwork of the V-shaped groove, the erection of the bottom formwork of the V-shaped groove and the installation and fixation of the PVC pipe of the cleaning hole.

In the embodiment, a special template support scheme is compiled before the pool wall template is installed, sample software is adopted for checking calculation, according to the checking calculation result, a 15mm thick multilayer board panel, a 50 multiplied by 100mm square wood is used for vertical corrugation, a phi 48 multiplied by 3.5mm frame pipe is used for transverse corrugation, and a phi 10mm @450mm is used for reinforcing the inclined support of the drawing water bolt and the steel pipe. Before the wall mold is installed, the connecting position of the pool wall is roughened, sundries in the wall are removed by an air compressor, and the measurement and paying-off work is carried out. In order to prevent the root of the wall form from leaking slurry and rotten root, before the wall form is installed, sponge strips are pasted on the bottom plate according to the paying-off size, so that the installation quality of the through-wall bolt is smooth, accurate, firm in bonding and capable of being noticed.

In this embodiment, the pool column formwork is made of 15mm thick multi-layer boards, and the vertical ridges are 50 × 100mm square timber, one for every 15 cm. The column hoops are made of phi 48 multiplied by 3.5mm steel pipes, each column hoop is 400-600 mm long, and the distance between the bottom layer and the ground is 250 mm. The vertical seam between the plate and the plate is processed to be a tongue-and-groove type splice, and then a column hoop and a support system are added to fix the column. The support is rigidly supported by a frame pipe with the diameter of 48 multiplied by 3.5mm and is connected with other columns into a whole.

In this embodiment, a 15mm thick multi-layer board is used for the top board template. The main keel is made of 100 multiplied by 100mm @1000mm square wood, and the secondary keel is made of 50 multiplied by 100mm @200mm double-faced planed square wood. In order to ensure the integral concrete forming effect of the top plate, the multilayer plates of the whole top plate are tiled in the same sequence and in the same direction, keels are required to be arranged below seams, the seams are tight, and the surface has no wrong platform phenomenon. If the column head is intersected with the column, the column head is not hidden, a hole corresponding to the size of the column is sawn in the multi-layer board, and the square wood is used as a keel of the column head. Roof braced system is the red scaffold frame of full hall of formula of bowl knot formula, and the pole setting interval is 1000mm, and the horizon bar interval is 1200mm, supports all to adopt adjustable top to hold in the palm, and adjustable range is less than 300 mm.

In this embodiment, during the support of the V-shaped groove bottom mold, 60X80 square timber is transversely adopted, and @600 is provided one step. When the formwork is supported, the lower end of the bottom formwork is aligned to a bottom leg line of a V-shaped groove which is bounced in advance, the bottom formwork is locally adjusted according to the angle of the V-shaped groove until the angle meets the design regulation, and in order to enable the joint between the hole sweeping PVC pipe and the bottom formwork to be tight, foam rubber is adopted to tightly plug the joint before concrete pouring. In order to ensure the one-step forming quality of the V-shaped groove and the tank wall, the joint between the V-shaped groove and the tank wall is tight, the joint is processed into a tongue-and-groove shape, and a sponge strip is stuck along the joint to prevent slurry leakage. And fixing the square timber along the top edge of the V-shaped groove according to the design height and the thickness of the inclined plate concrete, and controlling the elevation of the square timber by using a level meter.

In this embodiment, sweep and wash hole PVC pipe and lay fixedly, fix a position sweeping and washing hole PVC pipe one by one according to the design interval, sweep and wash hole PVC pipe material and adopt phi 28 plastics PVC sleeve pipe, because of the pool wall surface flatness may be some unevenness, so sweep and wash hole PVC pipe and should be based on the unloading of on-the-spot actual length, for making to sweep and wash hole location convenience, the length of wallboard to template can be taken, unnecessary part can be cut after the form removal. The PVC pipe of the cleaning hole is in the same horizontal state, the position close to the wall of the tank is fixed by small square wood of 15X20, the other end of the PVC pipe is fixed downwards by a wedge-shaped plate of 70X 30, one section of the template can be fixed by a concave-convex wedge-shaped template, and the wedge-shaped template is fixed on the template by iron nails.

In this embodiment, the concrete in the concrete pouring is pumped to a predetermined pouring position by a delivery pump, the concrete pouring is arranged as much as possible in the daytime according to the construction process and the construction period, and when the concrete is poured, the concrete is poured to the 500mm (construction joint) position of the pool wall for the first time, and the pool wall, the V-shaped groove and the top plate are poured at one time, specifically, the concrete comprises bottom plate concrete pouring, pillar pool wall concrete pouring, V-shaped groove concrete pouring and top plate concrete pouring.

In the embodiment, the concrete pouring of the bottom plate adopts an automobile pump pouring mode, and in order to ensure the integrity of the bottom plate, the concrete is continuously poured once without leaving a vertical construction joint; roughening the root of the pillar after pouring; the concrete with the lower part of the pool wall of 80 cm is required to be poured together with the bottom plate (the lifting mould is erected by a woodworker).

In this embodiment, the concrete for the wall of the column pool is filled with the same-ratio stone-removing mortar with a thickness of 30-50 mm before pouring. Concrete of the pillar and the pool wall is poured in layers, the concrete is vibrated in layers, the pouring thickness is 40 cm (50 vibrating rods are used) each time, and the pouring thickness is controlled by using a ruler rod and a handle lamp. The vibrating rod can not touch the reinforcing steel bars and the embedded pipe fittings, and people need to knock the template at any time to check whether the vibration is leaked or not except the vibration on the vibrating rod. When the pool wall is poured, one vibrating rod is placed every 6 meters, and the vibrating rod cannot be moved back and forth.

In this embodiment, the concrete pouring of the V-shaped groove is performed after the concrete pouring of the tank wall reaches the elevation of the bottom of the V-shaped groove and stops for 1 to 1.5 hours, because the section size is small, a worker with a better technique is arranged to vibrate during vibration, so as to prevent vibration leakage, surface holes are checked one by one after the concrete is poured and tamped, if deviation occurring in construction is found, the upwarped surface sweeping holes are corrected in time, and the upper surface of the V-shaped groove is subjected to secondary light collection before the initial setting of the concrete.

In the embodiment, the top plate concrete is poured after the pool wall and the beam are poured for 1h, pouring is sequentially carried out along the long edge direction, no construction joint is left, and a constructor stands in a channel which is erected in advance during pouring, so that a tread steel bar cannot be directly stepped on; and after pouring, performing secondary plastering before initial setting, and finally covering a plastic film.

In this embodiment, concrete placement and vibration typically requires: when the concrete of the pool wall is poured, pouring in layers, wherein the pouring thickness of each layer is not more than 500mm, and the upper layer of concrete is poured before the initial setting of the lower layer of concrete; in order to prevent the concrete from layering and segregation during concrete pouring, when the concrete is discharged from a pump pipe, the free pouring height of the concrete cannot exceed 2m, when the free pouring height of the concrete exceeds 2m, a chute is adopted to fall, the concrete cannot directly impact a template during concrete pouring, and before concrete of a vertical structure (a pool wall, a column and the like) is poured, a layer of cement mortar with the thickness of 30-50 mm and the same proportion is filled at the bottom of the concrete; when pouring, a special person is arranged to look at the formwork, the conditions of the formwork, the support, the reinforcing steel bar and the embedded sleeve are often observed, pouring is stopped immediately when deformation and displacement occur, and the concrete is well finished before initial setting; the quick-inserting and slow-pulling are required to be carried out by using the inserting type vibrating rod, inserting points are arranged in a quincunx shape in sequence, the moving distance cannot be omitted and is not more than 500mm, and the next layer of concrete is inserted for 50mm when the previous layer is vibrated so as to eliminate the seam between the two layers.

In this embodiment, following the removal order of "prop first and tear down, tear down afterwards earlier, tear down non-bearing part first and tear down bearing part later" when the template is demolishd, specifically include: dismantling a pool wall column template, a top plate template and a V-shaped groove template.

In this embodiment, the formwork for the pool wall column is removed, and the concrete can be removed after the strength of the concrete reaches 1.2MPa, so that the surface edges and corners of the concrete are not damaged by removing the formwork. After the strength of the concrete of the test piece is cured under the same conditions and reaches 1.0MPa, the through-wall bolt is loosened, so that the template is separated from the wall body. When the demolding is difficult, a crowbar can be used for prying the bottom of the template, the template is strictly forbidden to be pried and shaken at the upper opening or pounded by a sledge hammer, and the demolished template can timely clean residues on the template and the lining mold.

In this embodiment, the roof formwork is removed, and the roof formwork is removed according to the test report of the compressive strength of the roof concrete specimen under the same conditions, and the roof formwork can be removed after the concrete strength reaches 75% of the design strength. When the top plate template is dismantled, attention is paid to protecting the top plate template, and the seam of the template cannot be pried hard, so that the multilayer board is prevented from being damaged.

In this embodiment, the V-groove formwork is removed, because the wall plate of the V-groove is thin, the strength requirement is high, the maintenance work should be followed up day and night, the formwork can be removed in the formwork removal time when the strength of the concrete of the V-groove reaches 100% of the designed strength, and the V-groove wall and the surface sweeping hole cannot be seriously collided during formwork removal, and the maintenance work should be from top to bottom.

In this embodiment, the concrete post-curing: according to the local climate condition, after 12 hours of pouring and tamping, watering and curing are carried out, and water storage and curing can also be used, so that the poured and tamped concrete has enough hardening conditions, the phenomenon that the V-shaped groove generates drying and shrinking cracks due to water shortage is prevented, the strength requirement is high due to the thin wall plate of the V-shaped groove, the curing work needs to be followed by a specially-assigned person day and night, and the supervision is arranged. The curing time is not less than 14 days.

The invention can continuously adapt to the development of the chemical industry, adapt to the complex structure of the V-shaped filter, is beneficial to continuously summarizing the experience of various V-shaped filters and provides the experience for the same construction engineering in the future.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims

1. A V-shaped filter tank in sewage treatment is characterized by comprising a clean V-shaped filter tank, a production wastewater V-shaped filter tank, a production water tank and a pump room, wherein the clean V-shaped filter tank and the production wastewater V-shaped filter tank are overground uncovered water tanks.

2. A V-shaped filter pool pouring method in sewage treatment is characterized in that the V-shaped filter pool in sewage treatment as claimed in claim 1 is poured, and comprises a filter pool construction process and a water production pool and pump room construction process.

3. The V-shaped filter pool pouring method in sewage treatment according to claim 2, wherein the filter pool construction process sequentially comprises the following steps: construction preparation, site leveling, measurement lofting, foundation pit excavation, graded gravel backfilling, cushion concrete, bottom plate steel bars, bottom plate templates, bottom plate concrete, pool wall steel bars, pool wall templates, V-shaped groove steel bars, V-shaped groove templates, top plate steel bars, concrete pouring, concrete curing, template dismantling, inspection and acceptance.

4. The V-shaped filter pool pouring method in sewage treatment according to claim 2, wherein the construction process of the water production pool and the pump room sequentially comprises the following steps: construction preparation, site leveling, measurement lofting, foundation pit excavation, graded gravel backfilling, cushion concrete, bottom plate reinforcing steel bars, bottom plate templates, bottom plate concrete, pool wall reinforcing steel bars, pool wall templates, top plate reinforcing steel bars, concrete pouring, concrete maintenance, template dismantling, inspection and acceptance.

5. The method for casting the V-shaped filter tank in the sewage treatment according to claim 3 or 4, wherein the measurement lofting is specifically implemented by measuring two secondary control points according to an elevation datum point, taking protective measures for the secondary control points, recording the protective measures, reporting and supervising an organization and rechecking the third party to serve as a basis for the measurement lofting later; and measuring coordinates of four corners of the filter according to the rechecked secondary control points, guiding the coordinates of the four corners to the outer side of the filter for protection, controlling the error within 2mm as the control points of the filter, rechecking the control points once every week, and ensuring that the elevations of the V-shaped grooves of the filters are consistent.

6. The method for pouring the V-shaped filter tank in the sewage treatment according to claim 3 or 4, wherein the cushion concrete is cast at the bottom of the water collecting pit, the pit wall and other parts are continuously cast when the concrete strength reaches the high-rise condition, the pit wall part is cast in layers to prevent a mold from expanding, and the layering thickness is not more than 500 mm.

7. The V-shaped filter pool pouring method in sewage treatment according to claim 3 or 4, characterized in that steel bars are bound according to design requirements during manufacturing, and if the steel bars conflict with the PVC pipes of the flushing holes in the binding process, the steel bars are staggered to ensure that the PVC pipes of the flushing holes are unchanged in position; the method specifically comprises the manufacturing of filter beam column reinforcing steel bars, top plate reinforcing steel bars and V-shaped groove inclined plate face reinforcing steel bars.

8. The V-shaped filter pool pouring method in sewage treatment according to claim 3 or 4, characterized in that before the template is installed, sundries are removed, a positioning embedded part of the template is welded or trimmed, measurement paying-off is well performed, and leveling mortar under the template is well smeared; the method specifically comprises the steps of installing a pool wall template, installing a pool column template, installing a top plate template, erecting a V-shaped groove bottom die support bent frame, erecting a V-shaped groove bottom die and placing and fixing a hole sweeping PVC pipe.

9. The V-shaped filter pool pouring method in sewage treatment according to claim 3 or 4, characterized in that when the concrete is poured, the concrete is poured to the position 500mm away from the pool wall for the first time, and the pool wall, the V-shaped groove and the top plate are poured at one time; the concrete pouring method specifically comprises bottom plate concrete pouring, column pool wall concrete pouring, V-shaped groove concrete pouring and top plate concrete pouring.

10. A V-shaped filter pouring method in sewage treatment according to claim 3 or 4, characterized in that the templates are removed according to a removal sequence of support first and then removal, support second and first removal, non-bearing part first and then removal of bearing part; the method specifically comprises the following steps: dismantling a pool wall column template, a top plate template and a V-shaped groove template.