CN113232152B - Method for prefabricating concrete well chamber - Google Patents
Method for prefabricating concrete well chamber Download PDFInfo
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- CN113232152B CN113232152B CN202110446965.3A CN202110446965A CN113232152B CN 113232152 B CN113232152 B CN 113232152B CN 202110446965 A CN202110446965 A CN 202110446965A CN 113232152 B CN113232152 B CN 113232152B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
Abstract
The invention relates to a method for prefabricating a concrete well, which belongs to the technical field of concrete wells and comprises the following steps: step (1): selecting a flat ground as a prefabricated field, and pouring a concrete terrace in the prefabricated field area; step (2): the well chamber is laid down on a concrete terrace of the prefabricated field area for prefabrication, and then one-step pouring molding is carried out; and (3): dismantling a well chamber template for maintenance after the concrete well chamber has strength, transporting the well chamber to a foundation pit site by using mechanical equipment, cleaning and maintaining the original well chamber prefabricated position on the concrete ground, and performing the next round of well chamber prefabrication; the invention lays down the concrete well chamber for prefabrication in a prefabrication field, and then adopts movable mechanical equipment and installation, and the laying down and prefabrication are simple, fast, safe, low in cost and good in quality.
Description
Technical Field
The invention belongs to the technical field of concrete well rooms, and particularly relates to a method for prefabricating a concrete well room.
Background
The concrete pipe well chamber is an indispensable important component in an underground pipeline system, and has the following construction characteristics: the following pipelines are arranged, the battle line is long, and the distribution is wide.
The concrete well chamber formed by in-situ tissue casting has several disadvantages:
firstly, the workload of horizontal transportation of building materials such as a steel bar formwork scaffold is large;
secondly, the concrete well chambers are small in size, the batten templates are cut very small and short, the repeated utilization rate of turnover materials is low, a large number of scattered materials are provided, the site civilized construction is poor, each concrete well chamber is provided with a plurality of reserved holes, embedded parts and the like, the construction is very inconvenient, and the quality problem is easy to occur;
and finally, the well rooms are dispersed, and a scaffold is required to be built in each concrete well room construction, so that the construction management and the safety management of the site are greatly challenged.
If a traditional prefabricating method is adopted, a water stop belt is reserved in advance, the concrete pouring of the bottom plate of the well chamber is completed firstly, then the prefabricating work of a concrete well chamber can be completed only by erecting a scaffold, binding reinforcing steel bars, installing embedded parts and sealing a mold and pouring the concrete again at last, the work is very complicated, and the efficiency is not high. Therefore, a method for prefabricating a concrete well chamber is provided.
Disclosure of Invention
The invention aims to solve the problems and provide a method for prefabricating a concrete well chamber, which has a simple structure and reasonable design.
The invention realizes the purpose through the following technical scheme:
a method of prefabricating a concrete well, comprising the steps of:
step (1): selecting a flat ground as a prefabricated field, pouring a concrete terrace in the area of the prefabricated field, wherein the prefabricated field is convenient for transporting a rear plate car and a crane station, the well prefabrication sequence must be carried out according to the construction plan of the ground management, the layout and the planning are carried out in advance, and the well prefabrication sequence is placed in front of a stacking area and is convenient for transporting the well to the site for installation;
step (2): the well chamber is laid down on a concrete terrace of the prefabricated field area for prefabrication, and then one-step pouring molding is carried out;
and (3): and (3) dismantling the well chamber template for maintenance after the concrete well chamber has the strength, transporting the well chamber to a foundation pit site by using mechanical equipment, cleaning and maintaining the prefabricated position of the original well chamber on the concrete terrace, and performing the next round of well chamber prefabrication.
As a further optimization scheme of the invention, the step (2) of prefabricating the well chamber and then casting for one time specifically comprises the following steps:
step (21): erecting a fixed frame on a concrete floor of a prefabricated site for fixing a well chamber template;
step (22): according to the cross section size of the well chamber, a bottom lower layer template is horizontally paved at the bottom end of the fixing frame;
step (23): according to a well chamber drawing, arranging a hole position of a well chamber on a bottom lower-layer template, nailing the hole template, arranging cushion blocks around the upper part of the bottom lower-layer template, beginning to bind a steel bar in the shape of the well chamber, arranging a well mouth of the well chamber on one side surface, and respectively arranging two groups of lifting lugs on two opposite sides of the steel bar at the well mouth;
step (24): using the hole template as a support, placing a bottom upper layer template at the bottom end of the inner side of the steel bar, and then placing three-four-group two-way back ridges on the bottom upper layer template at the inner side of the steel bar according to the height of a well chamber;
step (25): placing inner formworks at two sides and inner ends on a bottom upper formwork at the inner side of a steel bar, wherein the inner formworks at two sides are propped against the bottom upper formwork and two back ridges, punching holes in the inner formworks and penetrating through opposite pull screw rods, then fixing a top lower formwork at the upper ends of the inner formworks at two sides at the inner side of the steel bar, and supporting the top lower formwork and the bottom upper formwork on the two back ridges of the bottom upper formwork by adopting battens;
step (26): the outer side template is fixedly connected with the outer side of the steel bar through a split-draw bar, then is fixed through a vertical rod of a fixing frame and a horizontal rod of an upper end pressing top, then is provided with an upper wellhead outer end sealing template, and the well chamber template is spliced;
step (27): and (4) correcting the well chamber template by adopting an inclined wooden support, locking the jacking horizontal rod of the fixing frame, and finishing the installation of the well chamber template.
As a further optimization scheme of the invention, the fixing frame comprises a plurality of groups of steel pipes which are fixed into a cuboid shape and comprise bottom steel pipes, vertical upright rods and horizontal rods at the top, the bottom steel pipes with different lengths are welded into a multi-lattice rectangle, the upper ends of the bottom steel pipes at the edges and the bottom ends of the rods are respectively provided with a connecting plate with holes, the connecting plates of the bottom steel pipes and the connecting plates are connected through bolts, and the horizontal rods are fixed on the two groups of opposite upright rods through connecting pieces.
As a further optimization scheme of the invention, after the lifting lugs in the step (23) are placed, protection measures are carried out on the four groups of lifting lugs by adopting white foam.
As a further optimization scheme of the invention, a plurality of groups of round holes are formed in the middle position of the upper-layer template at the bottom in the step (24).
As a further optimization scheme of the present invention, the step (2) further specifically includes:
step (28): after the well chamber template is installed, pouring some concrete on the top, pressing the bottom upper layer template, uniformly pouring concrete to two sides of the well chamber, vibrating by using a vibrating rod, and stopping when the concrete is blown out from the round hole of the bottom upper layer template.
Step (29): after the strength of the concrete meets the requirement, removing the fixing frame and the well chamber template, watering and curing the concrete, and keeping the surface of the concrete in a wet state; and (5) repairing the hole of the tension rod, cleaning the white foam before cleaning, and exposing the lifting lug.
The invention has the beneficial effects that:
1. compared with the traditional prefabrication and on-site cast-in-place prefabrication, the caving prefabrication is greatly improved in all aspects, firstly, the length and the width of most of well chambers are smaller than 1.8m in safety, the overhead operation is reduced, and the safety risk is reduced;
2. in terms of quality, each well chamber is formed by one-time pouring, no construction joint exists, guarantee is provided for subsequent well chamber water testing, no construction joint connection exists, and the appearance forming is good;
3. on the progress, the concrete is also cast once, and is not cast in situ or prefabricated in a standing way, but cast twice; and the prefabrication is not influenced by the process connection, when the foundation pit is excavated, the well chamber can be prefabricated in a prefabrication field, and after the excavation of the foundation pit is finished, the well chamber is directly hoisted, so that the influence of weather is small.
Drawings
FIG. 1 is an overall plan view of a well template and a fixing frame according to an improved prefabrication method for a concrete well;
FIG. 2 is a schematic view of the structure of plane A-A of FIG. 1;
FIG. 3 is a schematic view of the structure of the plane B-B of FIG. 1;
fig. 4 is a top view of the well chamber template building completed by the concrete well chamber improved prefabrication method.
In the figure: 1. a well chamber template; 11. a bottom lower layer template; 12. an opening template; 13. a bottom upper template; 14. an inner template; 15. a split lead screw; 16. two back ridges; 17. sealing the template; 18. an outer side template; 19. a top lower layer template; 100. bracing the inclined wood; 110. wood block; 2. a fixed mount; 21. a bottom steel pipe; 22. erecting a rod; 23. a horizontal bar; 24. (ii) a A connecting plate; 3. well room reinforcing bar.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
The method for prefabricating the concrete well chamber specifically comprises the following steps:
selection of prefabricated site
Selecting a 50 x 100m flat field, planning a prefabricated area, a stacking area and a driving route, and then pouring a concrete terrace in the prefabricated area.
Secondly, when a foundation pit is excavated, prefabricating the concrete well by adopting a method of laying down a well template and then pouring concrete on a concrete ground of the prefabricated site, wherein the concrete has strength after being formed for a period of time, and the concrete is as follows as shown in figures 1-4:
1. setting up of the holder 2
On the concrete terrace in prefabricated place, set up a mount 2 that can dismantle fixed well room template 1, the bottom steel pipe 21 welding of mount 2 is in the same place, the mount includes bottom steel pipe 21, the horizon bar 23 at vertical pole setting 22 and top, the bottom steel pipe 21 of different length welds into many check rectangles, the upper end of edge bottom steel pipe 21 and the bottom of pole all are equipped with the foraminiferous connecting plate 24 of 6mm thickness, connecting plate 24 between them passes through bolted connection, horizon bar 23 passes through the connecting piece to be fixed on relative two sets of pole settings 22, mount 2 can be fine bind well room template 1 together, when pouring the concrete, the template can not the come-up. The mount 2 is dimensioned to be 400mm enlarged on each side by the maximum length or width of the well.
2. Installation of bottom sub-floor form 11
According to the cross-sectional dimension of well room, lay bottom lower floor's template 11 in mount bottom top, bottom lower floor's template 11 must guarantee the level, and bottom lower floor's template 11 is fixed well through the nail with the flitch between around and the mount 2.
3. Installation of well room reinforcing bar 3, entrance to a cave template 12 and built-in fitting
According to well room drawing, put well room entrance to a cave position on bottom lower floor's template 11, then nail entrance to a cave template 12, the height of entrance to a cave template 12 just in time is the thickness of well room wall, the entrance to a cave position is put and is just fixed entrance to a cave template 12 above bottom lower floor's template 11, then put the cushion around bottom lower floor's template 11 top, the last plane of cushion and entrance to a cave template 12 go up the plane and lie in the coplanar, later begin the ligature reinforcing bar of well room shape, after 3 ligatures of well room reinforcing bar are accomplished, the well head of well room does not have the reinforcing bar setting in a side, install four lugs of entrance to a cave to the reinforcing bar, the well room lug adopts the round steel, if there are other built-in fitting in the bottom, install the built-in fitting.
4. Mounting of the bottom superstructure formwork 13
Bottom upper formwork 13 can utilize entrance to a cave template 12 as the support, because the future bottom is an inclosed space, the concrete of the inside can only lean on both sides to get into, it is closely knit in order to guarantee to vibrate the concrete of bottom, in bottom upper formwork 13's centre department, set up several groups of diameter 15 mm's round hole, as the observation hole of pouring the concrete, after bottom upper formwork 13 puts, according to the height of well room, put two stupefied 16 three four of the back of the body, choose 100 x 100 mm's vaulting pole for use, two stupefied 16 effects of the back of the body lie in supporting top formwork and propping up the bottom of both sides inner formworks 14 in the future.
5. Mounting of two side inner formworks 14, inner end inner formworks 14, and top lower formwork 19
The inner formworks 14 at two sides and the inner ends are fixed on the bottom upper layer formwork 13, the bottom ends of the inner formworks at two sides are propped against by two back ridges 16 of the bottom upper layer formwork 13, then holes are punched on the inner formworks 14, and the inner formworks are threaded with the opposite tension rods 15 and fixed with the respective outer formworks 18; and then installing a top lower formwork 19, fixing the top lower formwork 19 on the inner formworks 14 at two sides, and supporting the top lower formwork 19 on the two back ridges 16 of the bottom upper formwork 13 by adopting battens 110 in the middle.
6. The outer side template 18 and the outer end sealing template 17 are installed
The outer side formwork 18 is connected together through a pre-buried opposite-tension wire rod 15, a reinforcing back-ridge steel pipe is installed on the opposite-tension wire rod 15, then a vertical rod 22 of the upper fixing frame 2 and a horizontal rod 23 of the upper portion of the upper fixing frame are installed, the outer side formwork 18 is jacked together through a batten 110 and the vertical rod 22 of the fixing frame 2, the reinforcing effect is achieved, white foam is adopted to protect the four lifting lugs, the outer end sealing formwork 17 is installed finally, and the formwork part of the whole well chamber is installed completely.
7. Template correction and reinforcement
After the template of the well chamber is fixed, correction is started, the inclined wooden supports 100 are pulled up inside and outside the template, and the horizontal rods 23 pressed against the fixed frame 2 are locked, so that the stability of the whole template system is ensured.
8. Transportation, pouring and maintenance of concrete
The cast-in-place concrete adopts commercial concrete, the commercial concrete is transported to the site by a tank truck, each tank of concrete needs to be poured within 2 hours, firstly, some concrete is poured on the top and pressed on the top, as shown in 2, an arrow is the concrete filling direction, so that the bottom upper formwork 13 is just pressed through the force transmission, the bottom upper formwork is not easy to float, the concrete on two sides needs to be evenly discharged when being poured, the vibrating rod timely observes the round hole on the bottom upper formwork 13 when being vibrated, and when the concrete is emitted, the pouring is proved to be compact.
Thirdly, form removal, maintenance and transportation
And after the strength of the concrete meets the requirement, removing the fixed frame 2 and the well chamber template 1, watering and curing the concrete, keeping the surface of the concrete in a wet state, and repairing the hole of the split-lead screw 15.
White foams at the four lifting lugs are cleaned, the lifting lugs are exposed, the well chamber is lifted to a stacking area by a crane, after the well chamber is lifted, the bottom lower-layer template 11 is cleaned in time, oil is brushed, and then the well chamber prefabrication work of the next round is carried out.
According to the strength of the prefabricated well, the concrete well room is timely transported to a foundation pit site and installed, mechanical construction is adopted in the transporting and installing process, safety and rapidness are achieved, after the ground pipe is in place in a well room opening, formwork grouting is conducted, and test water backfilling is conducted.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (3)
1. A method of prefabricating a concrete well, comprising the steps of:
step (1): selecting a flat ground as a prefabricated field, and pouring a concrete terrace in the prefabricated field area;
step (2): the method comprises the following steps of prefabricating a well chamber on a concrete terrace of a prefabricated field area in a laid mode, and then pouring and forming at one time, wherein the method specifically comprises the following steps:
step (21): erecting a fixed frame on a concrete floor of a prefabricated site for fixing a well chamber template;
step (22): according to the cross section size of the well chamber, a bottom lower layer template is horizontally paved at the bottom end of the fixing frame;
step (23): according to a well chamber drawing, arranging a hole position of a well chamber on a bottom lower-layer template, nailing the hole template, arranging cushion blocks around the upper part of the bottom lower-layer template, beginning to bind a steel bar in the shape of the well chamber, arranging a well mouth of the well chamber on one side surface, and respectively arranging two groups of lifting lugs on two opposite sides of the steel bar at the well mouth;
step (24): the bottom upper-layer template is placed at the bottom end of the inner side of the steel bar by using the hole template as a support, a plurality of groups of round holes are formed in the middle position of the bottom upper-layer template, and then three, four and two back ridges are placed on the bottom upper-layer template at the inner side of the steel bar according to the height of a well chamber;
step (25): placing inner formworks at two sides and the inner end on a bottom upper formwork at the inner side of a steel bar, wherein the inner formworks at two sides are propped against the bottom upper formwork and two back ridges, punching holes in the inner formworks and penetrating counter-pulling screw rods, then fixing the top lower formwork at the upper ends of the inner formworks at two sides at the inner side of the steel bar, and supporting the top lower formwork and the bottom upper formwork on the two back ridges of the bottom upper formwork by adopting battens;
step (26): the outer side template is fixedly connected with the outer side of the steel bar through a split-draw bar, then is fixed through a vertical rod of a fixing frame and a horizontal rod of an upper end pressing top, then is provided with an upper wellhead outer end sealing template, and the well chamber template is spliced;
step (27): correcting the well chamber template by adopting an inclined wooden support, locking a jacking horizontal rod of the fixing frame, and finishing the installation of the well chamber template;
step (28): after the well chamber template is installed, pouring some concrete on the top, pressing the bottom upper layer template, uniformly pouring concrete to two sides of the well chamber, vibrating by using a vibrating rod, and stopping when the concrete is blown out from the round hole of the bottom upper layer template;
step (29): after the strength of the concrete meets the requirement, removing the fixing frame and the well chamber template, watering and curing the concrete, keeping the surface of the concrete in a wet state, repairing the hole of the tension rod, cleaning the previous white foam, and exposing the lifting lug;
and (3): and (3) after the concrete well chamber has strength and the well chamber template is removed for maintenance, the well chamber is transported to a foundation pit site by using mechanical equipment, the prefabricated position of the original well chamber on the concrete terrace is cleaned and maintained, and the next round of well chamber prefabrication is carried out.
2. A method of prefabricating a concrete well according to claim 1, wherein: the mount includes the fixed cuboid shape of growth of multiunit steel pipe, including the horizon bar at bottom steel pipe, vertical pole setting and top, and the bottom steel pipe of different length welds into many check rectangles, and the upper end of edge bottom steel pipe and the bottom of pole all are equipped with foraminiferous connecting plate, and bolted connection is passed through to connecting plate between them, and the horizon bar passes through the connecting piece to be fixed in relative two sets of poles setting.
3. A method of prefabricating a concrete well according to claim 1, wherein: and (5) after the lifting lugs are placed in the step (23), adopting white foam to carry out protection measures on the four groups of lifting lugs.
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| CN202110446965.3A CN113232152B (en) | 2021-04-25 | 2021-04-25 | Method for prefabricating concrete well chamber |
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| CN202110446965.3A CN113232152B (en) | 2021-04-25 | 2021-04-25 | Method for prefabricating concrete well chamber |
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