CN110485463B - Vertical wall pouring construction method and pouring construction device - Google Patents
Vertical wall pouring construction method and pouring construction device Download PDFInfo
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- CN110485463B CN110485463B CN201910818320.0A CN201910818320A CN110485463B CN 110485463 B CN110485463 B CN 110485463B CN 201910818320 A CN201910818320 A CN 201910818320A CN 110485463 B CN110485463 B CN 110485463B
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- 238000010276 construction Methods 0.000 title claims abstract description 53
- 239000004567 concrete Substances 0.000 claims abstract description 361
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000009415 formwork Methods 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 21
- 238000005266 casting Methods 0.000 claims description 20
- 239000011083 cement mortar Substances 0.000 claims description 8
- 239000004746 geotextile Substances 0.000 claims description 6
- 230000001680 brushing effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 29
- 239000010959 steel Substances 0.000 description 29
- 239000004568 cement Substances 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000002265 prevention Effects 0.000 description 4
- 241000264877 Hippospongia communis Species 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a vertical wall pouring construction method and a vertical wall pouring construction device, which comprise the following steps: finishing the installation of the vertical wall pouring construction device; enabling concrete to flow into branch pipelines with corresponding heights and to be poured onto the concrete layer in the cavity from the working window with corresponding heights to form a new concrete layer, and uniformly vibrating the new concrete layer through a vibrating device after the new concrete layer is poured, so that the concrete is poured into the cavity from low to high in layers; pouring concrete into the cavity from the opening at the top end of the die panel by adopting the layered pouring mode through a concrete conveying pump until the liquid level of the concrete layer in the cavity is consistent with the design height of the wall body; and forming concrete layers in the cavities, thereby completing the pouring construction of the wall units, and performing the pouring construction of the wall units one by one along the extending direction of the wall in the mode, so as to complete the pouring construction of the wall.
Description
Technical Field
The invention relates to the technical field of wall pouring construction, in particular to a vertical wall pouring construction method and a vertical wall pouring construction device.
Background
With the continuous promotion of urban infrastructure construction in China, underground structure projects such as underground rail transit, underground comprehensive pipe galleries and the like are gradually raised. The underground rail transit station is usually a two-layer or three-layer double-column three-span rectangular frame island station, the standard section is constructed by adopting an open excavation method, the width of the standard section is 18.0 m-24.0 m, the excavation depth of a foundation pit is 15.0 m-25.0 m, the height of each layer of wall body of the standard section of the main structure is 4.0 m-5.9 m, the length is 16.0 m-24.0 m, and the width is 0.7 m-0.9 m; the underground rail transit station is placed in a soil layer and has the service life of 100 years, so that the underground rail transit station has extremely high requirements on the durability, bearing capacity, service life and service function of a main body structure, and is constructed by adopting a special concrete construction method.
At present, a main body structure wall form is usually assembled by using a glued form or a single-side steel form large form. When the main body structure wall concrete pouring construction is carried out under the conditions of higher wall height, longer construction unit length, large wall surface area and narrow wall thickness, the main body structure wall concrete pouring construction will be as follows: 1. the coarse aggregate is accumulated and isolated within 2000mm of the bottom of the wall body due to large falling height of the concrete mixture, and the inside and the surface of the concrete are not fully wrapped and filled with coarse aggregate and skeleton gaps due to lack of cement paste after vibrating by a vibrating rod to generate cavities and honeycombs; 2. because the wall thickness of the main body structure is narrow, the height is higher, the dense condition restriction is laid to main body reinforcing steel bars, the time of vibration is overlong when concrete vibrates, vibration is uneven to form leakage vibration, and the exposed surface of the wall concrete after the template is removed is caused to generate bubbles, expansion molds, coarse aggregate is sunk, isolated and layered, loose and not dense, so that a water seepage channel is formed inside the concrete. Once groundwater on the side wall surface of the foundation pit permeates into the concrete along the water seepage channel, the steel bars of the wall body are corroded to expand the volume of the concrete, so that the concrete is cracked and leaked out of the wall body of the main structure, the appearance degree of the wall body of the station is influenced, the bearing capacity of the structure body of the station is reduced, the self water-proof capacity of the concrete is reduced, the service lives and the service functions of various facilities in the structural space of the rail transit are finally reduced, and the operation condition of the rail transit is deteriorated; meanwhile, the water seepage treatment cost during the long-term operation and maintenance of the rail transit is increased.
Disclosure of Invention
The invention provides a pouring construction method and a pouring construction device for a vertical wall body, which are used for solving the technical problem that the water seepage prevention capability of the wall body of a main body structure of the existing underground rail transit station is not in accordance with the requirement.
According to one aspect of the invention, there is provided a method of casting a vertical wall, comprising the steps of: a plurality of working windows are formed in the die panel along the height direction, a working window door is arranged on the die panel, the die panel is arranged on a supporting frame, the supporting frame is arranged on a formed bottom plate concrete layer, so that the die panel and a vertical wall of a foundation pit are oppositely arranged, a cavity for concrete to be poured is formed, a main pipeline with an input end provided with a feed hopper and arranged along the vertical direction and a branch pipeline with an input end connected with an output end of the main pipeline are arranged in a space area outside the die panel, the plurality of branch pipelines are distributed along the height direction and extend into the working windows at corresponding height positions, and a control valve for controlling the conveying amount of concrete in the branch pipeline is arranged, so that the installation of the vertical wall pouring construction device is completed; pouring concrete into the feeding hopper by controlling the concrete conveying pump and adjusting the control valve, so that the concrete flows into the sub-pipelines with the corresponding heights and is poured onto the concrete layer in the cavity from the working window with the corresponding height to form a new concrete layer, taking out the sub-pipelines with the corresponding heights from the working window with the corresponding height after the new concrete layer is poured, and vibrating the new concrete layer uniformly after the new concrete layer extends into the sub-pipelines with the corresponding heights from the working window with the corresponding height through the vibrating device, thereby pouring the concrete into the cavity from low to high in a layered manner until the height distance between the liquid level of the concrete layer and the bottom end of the uppermost working window is less than one third of the height of each concrete layer, and closing the uppermost working window through the uppermost working window door; pouring concrete into the cavity from the opening at the top end of the die panel by adopting the layered pouring mode through a concrete conveying pump until the liquid level of the concrete layer in the cavity is consistent with the design height of the wall body; and forming concrete layers in the cavities, thereby completing the pouring construction of the wall units, and performing the pouring construction of the wall units one by one along the extending direction of the wall in the mode until the total length of all the wall units is consistent with the design length of the wall, thereby completing the pouring construction of the wall.
Further, before installing the vertical wall pouring construction device, the method further comprises the following steps: and determining the height of each concrete layer in layered pouring according to the length, the thickness and the height of the wall units, so as to determine the number and the height of the working windows formed in the mold panel.
Further, the vertical wall pouring construction device is installed, and the method further comprises the following steps: if the length of the wall body unit is smaller than or equal to that of the single die panel, the single die panel is arranged on a die panel support frame, a cavity is formed between the die panel and the side wall surface of the foundation pit by arranging the die panel support frame on the formed bottom plate concrete layer, then a main pipeline and a branch pipeline are arranged in a space area outside the die panel, and a plurality of branch pipelines distributed along the height direction are respectively extended into working windows at corresponding heights; if the length of the wall body unit is greater than that of a single formwork panel, connecting the plurality of formwork panels along the length direction, then installing the plurality of formwork panels on the formwork panel supporting frame, installing the formwork panel supporting frame on the formed bottom plate concrete layer, enabling a cavity to be formed between the plurality of formwork panels and the side wall surface of the foundation pit, installing a plurality of main pipelines and branch pipelines along the length direction in a space area outside the plurality of formwork panels, and respectively extending the plurality of branch pipelines connected with each main pipeline and distributed along the height direction into working windows at corresponding heights of the corresponding formwork panels.
Further, after the vertical wall pouring construction device is completed, before the concrete is poured into the cavity from the branch pipelines from low to high in layers, the method further comprises the following steps: roughening the surface of the formed bottom plate concrete layer; cement mortar is poured into the feeding hopper, the cement mortar flows into the lowermost branch pipeline and is poured onto the bottom plate concrete layer from the lowermost working window through adjusting the control valve, and a seam layer of 20mm-30mm is formed, so that a new concrete layer is tightly connected with the formed bottom plate concrete layer.
Further, pouring concrete into the cavity from the branch pipelines from low to high in layers, comprising the following steps: starting a concrete delivery pump, adjusting a control valve, controlling concrete to flow into a lowermost branch pipeline and pouring the concrete from a lowermost working window onto a joint layer in a cavity to form a first concrete layer, taking out the lowermost branch pipeline from the lowermost working window after the first concrete layer is poured, and stretching a vibrating device into the first concrete layer from the lowermost working window to uniformly vibrate; controlling concrete to flow into the lowermost branch pipeline in the mode, and pouring the concrete into the cavity from the lowermost working window from low to high in a layering manner until the height distance between the liquid level of the concrete layer and the lowermost working window is lower than one third of the thickness of each layer of concrete layer, and closing the lowermost working window through the lowermost working window door; in the mode, concrete is poured into the cavity from low to high layers through the plurality of branch pipelines and the corresponding plurality of working windows which are distributed along the height direction, and when the height distance between the liquid level of the concrete layer and the bottom end of the uppermost working window is smaller than one third of the height of each concrete layer, the uppermost working window is covered by the uppermost working window.
Further, if the intermittent pouring of the concrete into the cavity from low to high is adopted, the intermittent time does not exceed the initial setting time of the concrete, the pouring is resumed after the intermittent pouring, the concrete is poured into the concrete layer in the cavity to form a new concrete layer, and the vibrating device penetrates through the new concrete layer and stretches into the previous concrete layer for 100mm-150mm, so that the upper concrete layer and the lower concrete layer are combined and uniformly vibrated, and the new concrete layer is tightly connected with the previous concrete layer.
Further, the concrete layer in the cavity is molded, which comprises the following steps: immediately covering the exposed surface of the concrete with wetted geotextile for curing after final setting and forming of the concrete layer at the top end of the wall; detecting the strength of the wall concrete, dismantling the vertical pouring construction device to the wall when the strength of the wall concrete is greater than 2.5MPa, immediately covering the exposed surface of the wall concrete by wet geotextile or brushing a concrete curing agent on the exposed surface of the wall concrete for curing, wherein the curing time is not less than fourteen days.
According to another aspect of the present invention, there is also provided a vertical wall pouring construction device including a vertical windowed form device mounted on a floor concrete layer formed on one side of a foundation pit and a vertical split pouring device mounted on the vertical windowed form device, the vertical windowed form device including a form panel for cooperating with a side wall surface of the foundation pit to perform wall pouring forming, a support frame for supporting the form panel and fixed on the formed floor concrete layer, a working window provided on the form panel and a working window door covered on the working window, the plurality of working windows being arranged in a height direction of the form panel, the vertical split pouring device including a conveying pipe for conveying concrete, a feed hopper mounted on a feed end of the conveying pipe for buffering and guiding the concrete into the conveying pipe, and a concrete conveying pump for timely conveying the concrete prepared by the concrete preparation device into the feed hopper, the conveying pipe including a main pipe with an input end connected with an output end of the feed hopper and arranged in a vertical direction, a sub pipe with an input end connected with the main pipe for extending into the working window, and a working window door for controlling the amount of concrete in the sub pipe, and a plurality of working windows being arranged in a height direction, the concrete is uniformly distributed in a height direction of the concrete layer being distributed from the side wall surface to the side wall surface of the concrete layer, and the concrete layer is poured in a height direction, and the concrete layer is uniformly distributed in each of the height position between the working window and the working window.
Further, a fixing frame for fixing the branch pipeline and the working window door is further arranged on the outer side wall surface of the die plate, and the fixing frame is arranged around the working window.
Further, the output end of the branch pipeline is inclined downwards, and the included angle between the branch pipeline and the horizontal plane is 20-40 degrees, so that concrete output by the main pipeline slides downwards to the cavity along the branch pipeline by utilizing the gravity of the concrete.
The invention has the following beneficial effects:
according to the vertical wall pouring construction method, the plurality of working windows are formed in the die face plate along the height direction, the plurality of branch pipelines are arranged in the space area outside the die face plate and extend into the working windows at the corresponding height positions, the concrete is poured into the feeding hopper by controlling the concrete conveying pump and adjusting the control valve, the concrete is poured into the cavity from the branch pipelines with different heights, so that the layered pouring of the wall is realized, the concrete falls onto the front poured concrete layer from the outlets of the branch pipelines, the pouring is performed in a layered manner from bottom to top, the corresponding working windows are used for pouring, the blanking height is reduced, the problem that coarse aggregate in the concrete is accumulated and isolated at the bottom layer due to large falling height and the problem that the material falls into excessive air from the high position to cause a cavity is solved, the concrete pouring material is uniformly distributed in the cavity, the height of each layer of concrete is easy to be controlled, the concrete is easy to pour from each layer of the cavity, the concrete is easy to uniformly infiltrate into the cement paste through the working windows at different heights, the position of the vibration device is easy to form a uniform layer, the cement paste can be prevented from penetrating into the wall after the wall is completely poured, the honeycomb structure is well, the cement paste is easy to fill the cement paste into the wall, and the wall is not uniform in the cavity is formed, and the cement paste is easy to fill the cement-tight and the wall is required to be filled into the wall after the wall is well and the uniform.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
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 specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic block diagram of a method of casting a vertical wall in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic side view of a vertical wall casting apparatus according to a preferred embodiment of the present invention;
FIG. 3 is a schematic elevational view of a vertical wall casting apparatus according to a preferred embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the working window and door closure of the vertical windowing template device in accordance with the preferred embodiment of the present invention;
fig. 5 is a schematic view showing the structure of the working window and door opening of the vertical windowing form device according to the preferred embodiment of the present invention.
Legend description:
100. a vertical windowed template device; 11. a mold panel; 12. a support frame; 121. vertical secondary ridges; 122. transverse secondary ridges; 123. A tripod; 1231. a vertical main rod; 1232. a transverse main rod; 1233. an inclined main rod; 1234. supporting the secondary rod; 124. a mounting bracket; 125. a manual operation platform; 13. a work window; 14. a working window door; 15. a fixing frame; 151. vertical ribs; 152. a fixed screw; 153. a transverse steel plate; 200. a vertical split-flow perfusion device; 21. a feed hopper; 22. a main pipe; 23. Dividing the pipeline; 24. a multi-way joint; 25. a control valve; 300. a foundation pit; 400. and (3) a bottom plate concrete layer.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.
FIG. 1 is a schematic block diagram of a method of casting a vertical wall in accordance with a preferred embodiment of the present invention; FIG. 2 is a schematic side view of a vertical wall casting apparatus according to a preferred embodiment of the present invention; FIG. 3 is a schematic elevational view of a vertical wall casting apparatus according to a preferred embodiment of the present invention; FIG. 4 is a schematic view of the structure of the working window and door closure of the vertical windowing template device in accordance with the preferred embodiment of the present invention; fig. 5 is a schematic view showing the structure of the working window and door opening of the vertical windowing form device according to the preferred embodiment of the present invention.
As shown in fig. 1, the vertical wall pouring construction method of the embodiment includes the following steps: a plurality of working windows 13 are formed in the die panel 11 along the height direction, a working window door 14 is arranged, the die panel 11 is installed on a support frame 12, the support frame 12 is installed on a formed bottom plate concrete layer 400, so that the die panel 11 and a vertical wall of a foundation pit 300 are oppositely arranged, a cavity for concrete to be poured is formed, a main pipeline 22 with an input end provided with a feed hopper 21 and arranged along the vertical direction and a sub pipeline 23 with an input end connected with an output end of the main pipeline 22 are installed in a space area outside the die panel 11, a plurality of sub pipelines 23 are distributed along the height direction and extend into the working windows 13 at corresponding heights, and a control valve 25 for controlling the conveying amount of concrete in the sub pipelines 23 is arranged, so that the installation of the vertical wall pouring construction device is completed; pouring concrete into the feeding hopper 21 by controlling the concrete conveying pump and adjusting the control valve 25, so that the concrete flows into the sub-pipelines 23 with the corresponding heights and is poured onto the concrete layer in the cavity from the working window 13 with the corresponding heights to form a new concrete layer, taking out the sub-pipelines 23 with the corresponding heights from the working window 13 with the corresponding heights after the new concrete layer is poured, and vibrating the new concrete layer uniformly after the concrete layer is stretched into the working window 13 with the corresponding heights through the vibrating device, thereby pouring the concrete into the cavity from low to high in layers until the height distance between the liquid level of the concrete layer and the bottom end of the uppermost working window 13 is less than one third of the height of each concrete layer, and covering the uppermost working window 13 through the uppermost working window door 14; pouring concrete into the cavity from the opening at the top end of the die panel 11 by adopting the layered pouring mode through a concrete conveying pump until the liquid level of the concrete layer in the cavity is consistent with the design height of the wall, and forming the concrete layer in the cavity, thereby completing the pouring construction of the wall unit; and pouring the wall units one by one along the extending direction of the wall in the mode until the total length of all the wall units is consistent with the design length of the wall, thereby completing the pouring construction of the wall. According to the vertical wall pouring construction method, the plurality of working windows 13 are formed in the die panel 11 along the height direction, the plurality of branch pipelines 23 are arranged in the space area outside the die panel 11 and extend into the working windows 13 at the corresponding height positions, then the concrete is poured into the feeding hopper 21 by controlling the concrete conveying pump and adjusting the control valve 25, the concrete is poured into the cavity from the branch pipelines 23 at different heights, so that layered pouring of the wall is realized, the concrete falls from the outlet of the branch pipelines 23 to the filled concrete layer at the front, the layered pouring is performed from bottom to top corresponding to the working windows 13 at the pouring plane, the blanking height is reduced, the problem that coarse aggregate in the concrete is stacked and isolated at the bottom layer due to large falling height and the problem that the material falls into excessive air from the high position to generate bubbles is solved, the concrete is evenly distributed in the cavity, the height of each layer is easy to be controlled from the branch pipelines 23 at different heights to the cavity, the cement paste is easily filled into the cavity through the hole, the cement paste is easily to be formed in the wall after the wall is completely filled into the cavity, the cement paste is easily filled into the wall through the hole, and the cement paste is easily-permeable to form the wall after the cement paste is filled into the wall, and the wall is easily-impermeable structure is formed, the cement paste is easily filled into the wall is filled into the cavity through the hole after the hole is filled into the hole, and the cement paste is easily-filled into the wall is easily to be filled into the wall. The height of each layer of concrete layer is consistent, and parameters of each layer of concrete layer in vibrating construction are consistent through a vibrating device, such as the depth of the vibrating device extending into the concrete layer, the vibrating frequency and the vibrating time, so that the uniform vibrating of each layer of concrete layer is ensured.
The formwork 11 is installed on the support frame 12, the support frame 12 is installed on the formed bottom plate concrete layer 400, so that the formwork 11 and the vertical wall of the foundation pit 300 are oppositely distributed and form a cavity to be poured, after concrete is poured into the cavity, the formwork 11 can deviate to the outer side of the cavity due to the influences of lateral pressure of the concrete and pouring impact force, the thickness of the wall is increased and exceeds the design thickness of the wall, the formwork 11 inclines towards the inner side of the cavity, the distance between the formwork 11 and the side wall of the foundation pit is gradually reduced from low to high, the distance between the bottom of the formwork 11 and the side wall of the foundation pit is equal to the design thickness of the wall, the distance between the top of the formwork 11 and the side wall of the foundation pit 300 is smaller than the design thickness of the wall, and accordingly the inclined distance of the formwork 11 is offset from the lateral pressure of the concrete poured into the cavity and the influence of the pouring impact force, and the concrete surface of the final-setting formed wall is a plumb surface, and therefore the design and construction technical requirements are met. The inclined distance of the mold panel 11 toward the inside of the cavity is determined according to the designed thickness and height of the wall body concrete. In this embodiment, the design thickness of the wall is 700mm-900mm, the design height is 4000mm-5000mm, and the distance between the top of the mold panel 11 and the side wall surface of the foundation pit is 20mm-30mm smaller than the design thickness of the wall.
Before the vertical wall pouring construction device is installed, the method further comprises the following steps: the height of each concrete layer in the layered pouring is determined according to the length, thickness and height of the wall units, thereby determining the number and height of the working windows 13 formed in the mold panel 11. In this embodiment, the vertical windowing form device 100 for wall unit casting construction is constituted by a single form panel 11, the wall unit height is 4000mm to 5000mm, and the thickness is 700mm to 900mm. The thickness of each concrete layer is 300mm-350mm. In this embodiment, the height of the mold plate 11 is 5400mm.
Installing a vertical wall pouring construction device, and further comprising the following steps: if the length of the wall unit is smaller than or equal to the length of the single formwork panel 11, installing the single formwork panel 11 on the formwork panel 11 support frame 12, installing the formwork panel 11 support frame 12 on the formed floor concrete layer 400 to form a cavity between the formwork panel 11 and the side wall surface of the foundation pit 300, installing the main pipeline 22 and the branch pipeline 23 in the space area outside the formwork panel 11, and respectively extending the plurality of branch pipelines 23 distributed along the height direction into the working windows 13 at the corresponding height positions; if the length of the wall unit is greater than that of the single formwork 11, the plurality of formwork 11 are connected along the length direction and then mounted on the formwork 11 support frame 12, the formwork 11 support frame 12 is mounted on the formed bottom plate concrete layer 400, so that a cavity is formed between the plurality of formwork 11 and the side wall surface of the foundation pit 300, a plurality of main pipelines 22 and sub-pipelines 23 are mounted in the space area outside the plurality of formwork 11 along the length direction, and the plurality of sub-pipelines 23 connected with each main pipeline 22 and distributed along the height direction extend into the working windows 13 at the corresponding height positions of the corresponding formwork 11 respectively.
After the vertical wall pouring construction device is completed, before the concrete is poured into the cavity from the branch pipeline 23 in a layered manner from low to high, the method further comprises the following steps: roughening the surface of the formed floor concrete layer 400; cement mortar is poured into the feed hopper 21, and the control valve 25 is adjusted to enable the cement mortar to flow into the lowest branch pipeline 23 and to be poured onto the bottom plate concrete layer 400 from the lowest working window 13, so that a seam layer of 20-30 mm is formed, and a new concrete layer is tightly connected with the formed bottom plate concrete layer 400.
The concrete is poured into the cavity from the branch pipeline 23 in layers from low to high, and the method comprises the following steps of: starting a concrete delivery pump, adjusting a control valve 25, controlling concrete to flow into the lowest branch pipeline 23, pouring the concrete from the lowest working window 13 onto a seam layer in the cavity to form a first concrete layer, taking out the lowest branch pipeline 23 from the lowest working window 13 after the first concrete layer is poured, and stretching a vibrating device from the lowest working window 13 into the first concrete layer for uniform vibration; controlling the concrete to flow into the lowermost branch pipeline 23 in the above manner and pouring the concrete into the cavity from the lowermost working window 13 from low to high in a layering manner until the height distance between the liquid level of the concrete layer and the lowermost working window 13 is less than one third of the thickness of each layer of the concrete layer, and closing the lowermost working window 14 through the lowermost working window 14; in the above manner, concrete is poured into the cavity from low to high layers through the plurality of branch pipes 23 and the corresponding plurality of working windows 13 which are arranged along the height direction, and when the height distance between the liquid level of the concrete layer and the bottom end of the uppermost working window 13 is less than one third of the height of each concrete layer, the uppermost working window 14 is covered by the uppermost working window 14.
If the intermittent pouring of concrete into the cavity from low to high is adopted, the intermittent time does not exceed the initial setting time of the concrete, the pouring is resumed after the intermittent pouring, the concrete is poured into the concrete layer in the cavity to form a new concrete layer, and the vibrating device penetrates the new concrete layer and stretches into the previous concrete layer for 100mm-150mm, so that the upper concrete layer and the lower concrete layer are combined and uniformly vibrated, and the new concrete layer is tightly connected with the previous concrete layer.
The concrete layer in the cavity is molded, which comprises the following steps: immediately covering the exposed surface of the concrete with wetted geotextile for curing after final setting and forming of the concrete layer at the top end of the wall; detecting the strength of the wall concrete, dismantling the vertical pouring construction device to the wall when the strength of the wall concrete is greater than 2.5MPa, immediately covering the exposed surface of the wall concrete by wet geotextile or brushing a concrete curing agent on the exposed surface of the wall concrete for curing, wherein the curing time is not less than fourteen days.
In the embodiment, after the vertical wall pouring device is installed, the connection part of each part is checked, so that the connection and the fastening of each part are ensured, and the wall concrete pouring construction can be performed. The wall concrete is high-performance concrete, the concrete mixture is prepared by stirring by adopting a stirrer transport vehicle, and the concrete is transported to a pouring place by a concrete transport pump. Before concrete pouring, firstly, performing performance test on the concrete mixture, wherein the performance test content comprises the following steps: the uniformity, color consistency, slump and loss, expansion, working performance, bleeding rate, air content, setting time, water-soluble chloride ion content, mortar density, coarse aggregate content in concrete per unit volume and molding temperature of the concrete mixture are checked. Between the pouring of the first concrete layer, a pre-mix cement mortar of the same strength level as the wall concrete is poured into the hopper 21. The ready-mixed cement mortar is delivered to the lowermost sub-pipe 23 by means of a concrete delivery pump and poured from the lowermost working window 13 onto the floor concrete layer in the cavity, forming a 20mm-30mm seam. The concrete mixture is poured into the feed hopper 21 and mixed by the concrete delivery pump The concrete is fed into the lowermost branch pipe 23 and poured from the lowermost working window 13 onto the seam layer in the cavity, forming a first layer of concrete with a thickness of 300-350 mm. The lowermost branch pipe 23 is then taken out of the lowermost working window 13 and the vibrating means is extended from the lowermost working window 13 into the first concrete layer for vibrating. Alternatively, the vibrating means employsThe inserted vibrating rod is inserted into the mould, is pulled out quickly and slowly, is pulled up and down, and is provided with the inserting points which are arranged in parallel or staggered uniformly, the vibrating displacement interval is not more than 1.5 times of the action radius of the vibrating device, the distance between the vibrating displacement interval and the inner wall surface of the mould panel 11 is kept between 50mm and 100mm, the vibrating time of each vibrating point is 20s to 30s, and the vibrating is considered to be compact until the surface of the concrete mixture stops sinking, no bubbles appear and the slurry is present. After the first layer of concrete is uniformly vibrated, the vibrating device is taken out from the lowest working window 13, and the lowest branch pipeline 23 extends into the lowest working window 13, so that concrete is conveyed into the lowest branch pipeline 23 through a concrete conveying pump, and poured onto the first layer of concrete in the cavity from the lowest working window 13, a second layer of concrete with the thickness of 300-350 mm is formed, and the second layer of concrete is uniformly vibrated through the vibrating device. The third concrete layer, …, is completed from low to high in the same manner as described above until the level of the completed concrete layer is 100mm to 150mm from the nth concrete layer at the bottom of the lowermost working window 13. The lowest working window 13 is covered and closed through the working window door 14, then the concrete is conveyed into the higher-level branch pipeline 23 through the concrete conveying pump, and the (n+1) th concrete layer with the thickness of 300mm-350mm is formed by pouring the concrete from the higher-level working window 13 onto the Nth concrete layer in the cavity. In the same way of pouring from low to high layers, the concrete is poured into the cavity layer by layer through the branch pipelines 23 which are arranged along the height direction and extend into the working windows 13 with the corresponding height until the distance between the liquid level of the concrete layer and the bottom of the uppermost working window 13 is 100mm-150mm, and the uppermost working window is opened 14 Is closed by closing the working window 13. The concrete is poured into the cavity from the opening at the top end of the die panel 11 by layers through the concrete delivery pump, and the vibrating device stretches into the concrete layer from the opening at the top end of the die panel 11 after each layer of concrete layer is poured, so that the concrete layer is uniformly vibrated. The working window 13 is covered by the working window door 14, so that the working window door 14 is not easily influenced by the lateral pressure of concrete to open outwards when concrete is poured and vibrated.
As shown in fig. 2 and 3, the vertical wall casting construction apparatus of the present embodiment includes a vertical windowing form device 100 installed on a floor concrete layer 400 formed on one side of a foundation pit 300 and a vertical split pouring device 200 installed on the vertical windowing form device 100.
As shown in fig. 2 and 3, the vertical windowed formwork apparatus 100 of this embodiment includes a formwork 11 for wall casting forming in cooperation with a side wall surface of a foundation pit 300, a support frame 12 for supporting the formwork 11, which is supported and fixed on a formed floor concrete layer 400, a working window 13 provided on the formwork 11, and a working window door 14 covering the working window 13, the plurality of working windows 13 being arranged along a height direction of the formwork 11, and concrete being poured into a cavity between the formwork 11 and the side wall surface of the foundation pit 300 from low to high layering by extending the working windows 13 at different heights through a concrete conveying pipe of the vertical split casting apparatus 200. According to the vertical windowing form device 100, the support frame 12 is fixed on the formed bottom plate concrete layer 400, the cavity for wall casting forming is formed between the form panel 11 arranged on the support frame 12 and the side wall surface of the foundation pit 300, the plurality of working windows 13 are formed in the form panel 11 along the height direction, the concrete conveying pipelines of the vertical split pouring device 200 extend into the working windows 13 at different heights, then concrete is poured into the cavity from low to high, the concrete falls onto the front poured concrete layer from the output port of the concrete conveying pipeline, so that coarse aggregates in the concrete are prevented from being accumulated and isolated at the bottom layer due to large falling height, the concrete pouring materials are distributed uniformly in the cavity, the height of each layer of concrete is easy to control, and after each layer of concrete is poured, the concrete is easy to uniformly vibrate through the working windows 13 at different heights, cement paste in the concrete layer can be uniformly attached and filled into the cavity between the coarse aggregates and the inside the cavity, the water seepage prevention structure is avoided, and the water seepage prevention requirements of the wall body is ensured, and the water seepage prevention structure is prevented from being formed inside the foundation pit 300.
As shown in fig. 4 and 5, a fixing frame 15 for fixing the branch pipe 23 and the working window door 14 is further provided on the outer side wall surface of the mold plate 11, and the fixing frame 15 is installed around the working window 13. When the vertical diversion pouring device 200 is used for pouring concrete, the concrete conveying pipeline extends into the cavity from the working window 13, and then the concrete conveying pipeline is fixed through the fixing frame 15, so that the concrete conveying pipeline is prevented from slipping from the working window 13 in the pouring process. After the concrete is poured into one layer, the working window door 14 of the layer is covered on the working window 13, and the working window door 14 is fixed through the fixing frame 15, so that concrete is prevented from leaking out of a gap between the working window door 14 and the die panel 11 due to loosening of the working window door 14 in the process of wall body forming.
As shown in fig. 4 and 5, the fixing frame 15 includes vertical ribs 151 disposed on the outer side wall surface of the die plate 11 in the height direction of the die plate 11, fixing screws 152 fixed to the vertical ribs 151, and transverse steel plates 153 mounted on the fixing screws 152; two transverse steel plates 153 are fixed on the vertical ribs 151 through fixing screws 152 so as to tightly press and fix the working window door 14, and the working window door 14 is tightly attached to the die panel 11 around the working window 13; two lateral steel plates 153 are fixed to the vertical ribs 151 by fixing screws 152 to clamp and fix the concrete conveying pipe between the two lateral steel plates 153 adjacently arranged in the height direction of the die face plate 11. The working window door 14 is hinged on the die panel 11 through a rotary connecting piece, the working window door 14 is turned over and covered on the working window, and the working window door 14 is pressed and fixed by fixing the transverse steel plate 153 on the fixing screw 152. The working window 14 is provided with a frame, and the transverse steel plate 153 is attached to the frame. Optionally, the fixing frame 15 further comprises a vertical steel plate fixed on the transverse steel plate 153 along the height direction of the die panel 11, the two transverse steel plates 153 and the two vertical steel plates form a frame structure, the concrete conveying pipeline is clamped and fixed,
The inner side wall surface of the working window door 14 is provided with a bump matched with the working window 13, and when the working window door 14 is covered on the working window 13, the bump faces the inner side wall surface of the cavity and is coplanar with the inner side wall surface of the mold panel 11 so as to ensure the flatness of the wall surface of the wall body.
As shown in fig. 4 and 5, the work window 14 is hinged to the mold plate 11, and a handle is provided on the outer side wall surface of the work window 14. In this embodiment, the work window 14 is hinged to the die face plate 11 by a swivel connection. The rotary connector comprises a hinge seat fixed on the die plate 11 and a connecting block hinged on the hinge seat, wherein the working window door 14 is welded and fixed on the connecting block, and the connecting block is L-shaped.
Referring to fig. 1 and 2, the support frame 12 includes vertical minor ridges 121 disposed along the height direction of the mold panel 11, transverse minor ridges 122 disposed along the length direction of the mold panel 11, and a tripod 123 fixed on the transverse minor ridges 122, wherein a plurality of vertical minor ridges 121 are connected with a plurality of transverse minor ridges 122 to form a mesh-shaped support structure, so as to avoid deformation of the mold panel 11 during concrete casting. The tripod 123 includes a vertical main bar 1231 disposed along the height direction of the die panel 11 and fixed to the plurality of lateral secondary ribs 122, a lateral main bar 1232 vertically connected to the vertical main bar 1231 and supported and fixed to the formed floor concrete layer 400, and an oblique main bar 1233 connected to the vertical main bar 1231 and the lateral main bar 1232 in a triangular stable support structure. The tripod 123 further comprises a plurality of support sub-poles 1234 connected to at least one of the vertical main pole 1231, the horizontal main pole 1232, the diagonal main pole 1233, the support sub-poles 1234, the vertical main pole 1231, the horizontal main pole 1232, the diagonal main pole 1233 being connected in a triangular support structure or a trapezoidal support structure. The bottom end of the tripod 123 is fixed to the floor concrete 400 by anchor bolts.
Referring to fig. 1 and 2, the support frame 12 further includes a mounting bracket 124 fixed to the top of the tripod 123, and a manual operation platform 125 and a guard rail are mounted on the mounting bracket 124. The concrete delivery pump delivers concrete into the feed hopper 21 of the vertical split-flow pouring device 200, and the height of the manual operation platform 125 is 100mm-200mm lower than the height of the feed hopper 21 of the vertical split-flow pouring device 200, so that operators can observe whether the color and state of the concrete output by the concrete delivery pump are normal at any time.
In the present embodiment, the group of the mold plates 11 is constituted by a steel plate having a thickness of 10mm, a width of 2000mm, and a height of 5400 mm. And 1 steel plate with the thickness of 10mm and the width of 100mm is welded on the periphery of the die panel 11 to form a panel frame. The panel frame and the mould panel 11 are respectively provided with round holes with the interval of 150mm and the aperture of 16 mm. The panel frame and the mould panel 11 are firmly welded and polished to be smooth, the welding seam has no bubble, slag inclusion and false welding phenomena and has the phenomenon of smooth surface and no hole gap, thereby avoiding the influence on the concrete surface quality caused by the buckling deformation of the mould panel 11 in the use process and avoiding the dislocation of the joint between the panels. 5 vertical secondary ribs 121 with the length of 5380mm, which are 400mm, 500mm and 300mm, are welded on the outer side wall surface of the die panel 11 along the length direction of the die panel 11 respectively, so that the die panel 11 is free from concave-convex deformation and deformation when repeatedly used for many times, and has enough rigidity and strength. 5 transverse secondary ribs 122 with the length of 2000mm, which are 1000mm in interval, are welded on the panel frame and the vertical secondary ribs 121 from the bottom end to the top end along the height direction of the die panel 11, so that the die panel 11 is free from concave-convex and deformation when repeatedly used for many times, and has enough rigidity and strength. The top end of the vertical secondary ridge 121 is provided with a hanging ring for hanging the whole device. Two working windows 13 are distributed on the die panel 11 along the height direction, and the working windows 13 are positioned between two adjacent vertical secondary ridges 121 with the spacing of 500 mm. The working window 13 has a length of 350mm and a height of 400mm. The distance between the bottom edge of the working window 13 at the lower end and the bottom end of the die face plate 11 is 1200mm-1600mm. The distance between the top edge of the working window 13 at the lower end and the bottom edge of the working window 13 at the upper end is 1200mm-1600mm. The distance between the top edge of the working window 13 at the upper end and the top end of the die face plate 11 is 1200mm-1600mm. The working window and door 14 comprises an inner layer steel plate which is the same as the material and the thickness of the die plate 11 and an outer layer steel plate which is welded with the inner layer steel plate and is used for being attached to the outer side wall surface of the die plate 11, wherein the four sides of the outer layer steel plate are larger than the four sides of the inner layer steel plate by 30mm. The inner layer steel plate forms a convex block matched with the working window 13, the thickness of the inner layer steel plate is 10mm, the length is 348mm, and the height is 398mm. The edges of the inner layer steel plate of the working window door 14 and the edges of the working window 13 are polished and leveled, so that the close fit between the edges of the periphery of the inner layer steel plate of the working window door 14 and the edges of the periphery of the working window 13 is ensured, and the connection gaps are required to be compact and leak no concrete slurry. The thickness of the outer layer steel plate of the working window door 14 is 10mm, the width is 410mm, the height is 460mm, and the position of the working window 13 can be fully covered by the outer layer steel plate of the working window door 14 when the working window door 14 is in a closed state.
Referring to fig. 2 and 3, the vertical split-flow pouring device 200 of the present embodiment is used for pouring concrete from a low place to a high place from a plurality of working windows 13 arranged in a vertical direction on a die panel 11 into a cavity between the die panel 11 and a side wall surface of a foundation pit 300, the vertical split-flow pouring device 200 includes a conveying pipe for conveying concrete, a feed hopper 21 mounted on a feed end of the conveying pipe for buffering and guiding the concrete into the conveying pipe, and a concrete conveying pump for timely conveying the concrete prepared by the concrete preparing device into the feed hopper 21, the conveying pipe includes a main pipe 22 having an input end connected with an output end of the feed hopper 21 and arranged in a vertical direction, a branch pipe 23 having an input end connected with an output end of the main pipe 22 for extending into the working windows 13, and a control valve 25 for controlling a conveying amount of the concrete in the branch pipe 23, and the plurality of branch pipes 23 extending into the working windows 13 at corresponding heights, respectively, so as to pour the concrete from a low place into the cavity. According to the vertical split-flow pouring device 200, concrete prepared by the concrete preparation device is conveyed into the feeding hopper 21 through the concrete conveying pump, the concrete in the feeding hopper 21 enters the main pipeline 22 distributed along the vertical direction, the plurality of sub-pipelines 23 communicated with the main pipeline 22 and distributed along the vertical direction extend into the working windows 13 at the corresponding height positions respectively, and the concrete is poured into the cavities between the mould face plate 11 and the side wall surface of the foundation pit 300 from different sub-pipelines 23 and the working windows 13 at the corresponding heights in a layered manner through the regulating control valve 25, when the liquid level of the concrete layer in the cavities is close to the bottom end of the working window 13 at the corresponding height, the working window 13 is closed, the concrete rapidly flows into the high-level sub-pipelines 23 through the regulating control valve 25 and falls onto the poured concrete layer from the lower side of the high-level working window 13, so that the concrete is conveyed into the cavities from low to high lands through the plurality of sub-pipelines 23, the concrete is prevented from falling to be easily separated in the large height and the falling time in the pouring process, the concrete is easily to be easily permeated into the cavities in the large and the rough and thick and thin and thick and dense sides, and the concrete is not well-adhered to the side wall is formed, and the concrete is well-formed, and the wall is prevented from being well filled. Optionally, the pipe diameter of the branch pipe 23 gradually increases from the input end to the output end, so as to facilitate free sliding of the materials and avoid blockage. Optionally, a plurality of sub-pipes 23 of the same level are connected to the main pipe 22 in a fan shape. The main pipeline 22, the branch pipelines 23 and the die panel 11 form a triangular stable supporting structure, so that the structural stability is better. Optionally, at least one of the main pipe 22, the branch pipe 23 and the feed hopper 21 is provided with a vibration device, and the blanking is promoted by vibration so as to avoid blockage. Optionally, a filter screen is arranged in the feed hopper 21 and is used for filtering large particles and slowing down the blanking speed, so that blockage caused by accumulation of materials is avoided.
The branch pipe 23 is inclined downwards, the included angle between the branch pipe 23 and the main pipe 22 is 110-130 degrees, and the height difference between the input end and the output end of the branch pipe 23 is 100-300 mm, so that the concrete output by the main pipe 22 slides down the branch pipe 23 to the cavity by utilizing the gravity of the concrete. If the included angle between the branch pipe 23 and the main pipe 22 exceeds 130 degrees and the height difference between the input end and the output end of the branch pipe 23 exceeds 300mm, the impact force is large when the concrete slides down from the branch pipe 23 to the cavity and falls on the concrete layer below, so that holes and honeycombs are easily generated on the concrete layer below. If the included angle between the branch pipe 23 and the main pipe 22 is less than 110 degrees and the height difference between the input end and the output end of the branch pipe 23 is less than 100mm, the concrete receives a large resistance in the branch pipe 23, and is easily blocked in the branch pipe 23.
The output end of the main pipe 22 is communicated with a plurality of branch pipes 23 through a multi-way joint 24. The multi-way joint 24 includes a connection pipe arranged in a vertical direction for connection with an output end of the main pipe 22 and joint pipes provided on the connection pipe for connection with input ends of the branch pipes 23, and a plurality of joint pipes are respectively connected with the corresponding branch pipes 23. The control valve 25 is mounted on the joint pipe. After the main pipeline 22, the multi-way joint 24, the branch pipelines 23 and the control valve 25 are connected, the connection part is fixed through a pipe clamp.
The main pipeline 22 and the multi-way joint 24 are steel pipes, and the branch pipelines 23 are steel wire rubber pipes. The main pipe 22 is connected with the feed hopper 21 by welding. The steel wire rubber tube is pressure-resistant, durable and easy to adjust the position.
The branch pipe 23 is provided with a fixing structure for fixing the branch pipe 23 and the mold plate 11 so that the output end of the branch pipe 23 extends into the working window 13 for concrete pouring.
The support frame 12 of the mould panel 11 is provided with a manual operation platform 125 for an operator to install the vertical split-flow pouring device 200, and the position of the inlet of the feeding hopper 21 is 100mm-200mm higher than that of the manual operation platform 125. An operator can observe whether the color of the concrete in the feed hopper 21 is uniform and whether the concrete is uniformly stirred at any time on the manual operation platform 125. The vertical split charging device 200 further comprises a mounting bracket for mounting on the support frame 12 of the die face plate 11 to support the main pipe 22 and the feed hopper 21. The main pipeline 22 and the feeding hopper 21 are supported through the mounting frame, so that the feeding hopper 21 and the main pipeline 22 shake to generate safety accidents in the concrete conveying process.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The vertical wall pouring construction method is characterized by comprising the following steps of:
a plurality of working windows (13) are formed in the die panel (11) along the height direction, a working window door (14) is arranged, the die panel (11) is installed on a supporting frame (12), the supporting frame (12) is installed on a formed bottom plate concrete layer (400), so that the die panel (11) and a vertical wall of a foundation pit (300) are oppositely arranged, a cavity for concrete to be poured is formed, a main pipeline (22) with a feeding hopper (21) and arranged along the vertical direction and a branch pipeline (23) with an input end connected with an output end of the main pipeline (22) are arranged in the space area outside the die panel (11), the plurality of branch pipelines (23) are arranged along the height direction and extend into the working windows (13) at corresponding heights, and a control valve (25) for controlling the conveying amount of the concrete in the branch pipeline (23) is arranged, so that the installation of the vertical wall pouring construction device is completed;
pouring concrete into the feed hopper (21) by controlling the concrete conveying pump and adjusting the control valve (25), enabling the concrete to flow into the branch pipelines (23) with corresponding heights and to be poured onto the concrete layer in the cavity from the working window (13) with corresponding heights to form a new concrete layer, taking out the branch pipelines (23) with corresponding heights from the working window (13) with corresponding heights after the new concrete layer is poured, and vibrating the new concrete layer uniformly after the concrete layer is stretched into the working window (13) with corresponding heights through the vibrating device, so that the concrete is poured into the cavity from low to high in layers until the height distance between the liquid level of the concrete layer and the bottom end of the uppermost working window (13) is less than one third of the height of each concrete layer, and covering the uppermost working window (13) through the uppermost working window door (14);
Pouring concrete into the cavity from the opening at the top end of the die panel (11) through the concrete conveying pump in a layered pouring mode until the liquid level of the concrete layer in the cavity is consistent with the design height of the wall body;
forming concrete layers in the cavities, thereby completing the pouring construction of the wall units, and performing the pouring construction of the wall units one by one along the extending direction of the wall in the mode until the total length of all the wall units is consistent with the design length of the wall, thereby completing the pouring construction of the wall;
before the vertical wall pouring construction device is installed, the method further comprises the following steps: according to the length, thickness and height of the wall units, determining the height of each concrete layer in layered pouring, and accordingly determining the number and the height of working windows (13) formed in the mould panel (11);
installing a vertical wall pouring construction device, and further comprising the following steps:
if the length of the wall body unit is smaller than or equal to that of the single mould panel (11), the single mould panel (11) is arranged on a mould panel (11) supporting frame (12), the mould panel (11) supporting frame (12) is arranged on a formed bottom plate concrete layer (400), a cavity is formed between the mould panel (11) and the side wall surface of a foundation pit (300), a main pipeline (22) and a branch pipeline (23) are arranged in a space area outside the mould panel (11), and a plurality of branch pipelines (23) distributed along the height direction extend into working windows (13) at corresponding heights respectively;
If the length of the wall body unit is greater than that of a single formwork panel (11), connecting the plurality of formwork panels (11) along the length direction and then installing the formwork panels (11) on a formwork panel (11) supporting frame (12), installing the formwork panel (11) supporting frame (12) on a formed bottom plate concrete layer (400), enabling a cavity to be formed between the plurality of formwork panels (11) and the side wall surface of a foundation pit (300), installing a plurality of main pipelines (22) and branch pipelines (23) along the length direction in a space area outside the plurality of formwork panels (11), and respectively extending a plurality of branch pipelines (23) connected with each main pipeline (22) and distributed along the height direction into working windows (13) corresponding to the corresponding formwork panels (11).
2. The vertical wall casting method according to claim 1, wherein after the vertical wall casting device is completed, before the concrete is layered poured into the cavity from the branch pipe (23) from low to high, the method further comprises the steps of:
roughening the surface of the formed floor concrete layer (400);
cement mortar is poured into the feed hopper (21), and the control valve (25) is adjusted to enable the cement mortar to flow into the lowest branch pipeline (23) and to be poured onto the floor concrete layer (400) from the lowest working window (13), so that a seam layer of 20-30 mm is formed, and a new concrete layer is tightly connected with the formed floor concrete layer (400).
3. A method of vertical wall casting according to claim 2, characterized in that the concrete is poured into the cavity from the branch pipe (23) layer by layer from low to high, comprising the steps of:
starting a concrete delivery pump, adjusting a control valve (25), controlling concrete to flow into a lowermost branch pipeline (23) and pouring the concrete from a lowermost working window (13) onto a seam layer in a cavity to form a first concrete layer, taking out the lowermost branch pipeline (23) from the lowermost working window (13) after the first concrete layer is poured, and stretching a vibrating device into the first concrete layer from the lowermost working window (13) to vibrate uniformly;
controlling concrete to flow into the lowest branch pipeline (23) in the mode, and pouring the concrete into the cavity from the lowest working window (13) from low to high in a layering manner until the height distance between the liquid level of the concrete layer and the lowest working window (13) is lower than one third of the thickness of each layer of concrete layer, and covering the lowest working window door (14) through the lowest working window door (14);
in the mode, concrete is poured into the cavity from low to high layers through the plurality of branch pipelines (23) and the corresponding plurality of working windows (13) which are distributed along the height direction, and when the height distance between the liquid level of the concrete layer and the bottom end of the uppermost working window (13) is less than one third of the height of each concrete layer, the uppermost working window (14) is covered by the uppermost working window (14).
4. The method for casting a vertical wall according to claim 3, wherein,
if the intermittent pouring of concrete into the cavity from low to high is adopted, the intermittent time does not exceed the initial setting time of the concrete, the pouring is resumed after the intermittent pouring, the concrete is poured into the concrete layer in the cavity to form a new concrete layer, and the vibrating device penetrates the new concrete layer and stretches into the previous concrete layer for 100mm-150mm, so that the upper concrete layer and the lower concrete layer are combined and uniformly vibrated, and the new concrete layer is tightly connected with the previous concrete layer.
5. The method of casting a vertical wall according to claim 1, wherein the concrete layer in the cavity is formed, comprising the steps of:
immediately covering the exposed surface of the concrete with wetted geotextile for curing after final setting and forming of the concrete layer at the top end of the wall;
detecting the strength of the wall concrete, dismantling the vertical pouring construction device to the wall when the strength of the wall concrete is greater than 2.5MPa, immediately covering the exposed surface of the wall concrete by wet geotextile or brushing a concrete curing agent on the exposed surface of the wall concrete for curing, wherein the curing time is not less than fourteen days.
6. A vertical wall pouring construction device constructed by the vertical wall pouring construction method according to claim 1 is characterized in that,
comprises a vertical windowing template device (100) arranged on a formed bottom plate concrete layer (400) at one side of a foundation pit (300) and a vertical diversion pouring device (200) arranged on the vertical windowing template device (100),
the vertical windowing form device (100) comprises a form panel (11) which is matched with the side wall surface of a foundation pit (300) to perform wall body pouring molding, a support frame (12) which is supported and fixed on a molded bottom plate concrete layer (400) and is used for supporting the form panel (11), a working window (13) arranged on the form panel (11) and a working window door (14) covered on the working window (13), wherein a plurality of working windows (13) are distributed along the height direction of the form panel (11),
the vertical diversion pouring device (200) comprises a conveying pipeline for conveying concrete, a feed hopper (21) arranged on the feeding end of the conveying pipeline and used for buffering and guiding the concrete into the conveying pipeline, and a concrete conveying pump used for timely conveying the concrete prepared by the concrete preparation device into the feed hopper (21), wherein the conveying pipeline comprises a main pipeline (22) with an input end connected with the output end of the feed hopper (21) and distributed along the vertical direction, a branch pipeline (23) with an input end connected with the output end of the main pipeline (22) and used for extending into a working window (13), and a control valve (25) used for controlling the conveying amount of the concrete in the branch pipeline (23),
The plurality of branch pipelines (23) distributed along the vertical direction extend into the working windows (13) at the corresponding heights respectively so as to layer-fill concrete into the cavity between the die panel (11) and the side wall surface of the foundation pit (300) from low to high, and the working windows (13) at different heights of the vibrating device extend into the cavity so as to uniformly vibrate each layer of concrete layer.
7. The vertical wall casting apparatus according to claim 6, wherein,
the outer side wall surface of the mold panel (11) is also provided with a fixing frame (15) for fixing the branch pipeline (23) and the working window door (14), and the fixing frame (15) is erected around the working window (13).
8. The vertical wall casting apparatus according to claim 6, wherein,
the output end of the branch pipeline (23) is inclined downwards, and the included angle between the branch pipeline (23) and the horizontal plane is 20-40 degrees, so that the concrete output by the main pipeline (22) slides down the branch pipeline (23) to the cavity by utilizing the gravity of the concrete.
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| CN111764546A (en) * | 2020-06-15 | 2020-10-13 | 成都魔筑科技有限公司 | Construction method for cast-in-place light concrete partition wall of steel bar truss keel mark mold |
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