CN111074852B - Channel lining concrete cast-in-place method and nonlinear channel lining construction method - Google Patents
Channel lining concrete cast-in-place method and nonlinear channel lining construction method Download PDFInfo
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- CN111074852B CN111074852B CN201911330721.8A CN201911330721A CN111074852B CN 111074852 B CN111074852 B CN 111074852B CN 201911330721 A CN201911330721 A CN 201911330721A CN 111074852 B CN111074852 B CN 111074852B
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Abstract
The invention relates to a channel lining concrete cast-in-place method and a nonlinear channel lining construction method, which comprise the following steps: the method comprises the following steps of concrete preparation, template installation, concrete storehouse surface moistening, concrete spreading for the first time, vibration for the first time, concrete spreading for the second time, vibration for the second time, scraping treatment, polishing treatment, surface finishing, press polishing and curing treatment. By spreading concrete twice and vibrating twice, the invention has the effects that the channel lining structure obtained by construction is more compact, and the quality and the aesthetic degree of the whole channel project are favorably improved.
Description
Technical Field
The invention relates to the technical field of channel construction, in particular to a channel lining concrete cast-in-place method and a nonlinear channel lining construction method.
Background
The hydraulic engineering is a foundation engineering related to the national civilization, and the construction of the hydraulic channel is an important component of the hydraulic engineering, so that the quality of the hydraulic engineering can be ensured only by ensuring the proper construction method of the hydraulic channel.
The invention Chinese patent with the publication number of CN109295928A is retrieved, and discloses a water conservancy channel construction method, which comprises the following steps: (1) firstly, roughly cutting a slope by adopting an excavator, and then planing loose soil on the slope; (2) removing and treating rusty spots, calcium films, broken and loosened rock masses on the slope surface; (3) the bottom plates are arranged on the bottom surfaces of the channels side by side along the length direction of the channels, the surfaces of the bottom plates are provided with filling grooves matched with the shapes of the bottom plates, the lime soil is tightly pressed in the filling grooves, and the surfaces of the lime soil and the bottom plates are flush; (4) the side plates are arranged in the two openings of the bottom plate, and the connecting gap between the side plates and the bottom plate is filled with dust; (5) installing a template according to the measurement lofting; (6) pouring concrete in the spliced templates; (7) and (5) stopping water, installing the expansion joint, maintaining after installation, and manually removing the formwork after the installation is in an age period.
In the step (6), before concrete is poured, a layer of cement mortar with the thickness of 2-3cm is paved, concrete pouring is carried out after the cement mortar is solidified, a vibrator is adopted to vibrate in the pouring process, the mass concrete is vibrated by an inserted high-frequency vibrator, a flexible shaft inserted vibrator and a flat plate vibrator are adopted to vibrate the structural part of the plate girder, and the vibrator cannot directly collide a template, a steel bar and an embedded part so as to prevent the template from being deformed and the embedded part from being displaced; the vibration time is based on that the concrete does not obviously sink any more, no bubble appears and the slurry begins to spread; the distance that the vibrator removed is with not more than 1.5 times of its effective radius, and insert lower floor 5 ~ 10cm, and the sequence of vibrating goes on in proper order, and the direction is unanimous, and the vibrting spear is inserted and is pulled out slowly to the upper and lower floor of assurance concrete combines, avoids leaking to shake and cross the vibration.
The above prior art solutions have the following drawbacks: according to the method, the canal lining is formed by adopting a mode of spreading concrete once and vibrating by a vibrator once, and because the thickness of the common canal lining is about 10cm and is still relatively thick, the situation that the local position of the canal lining cannot be firmly vibrated can exist, so that the structure of the local position of the canal lining is not compact enough, and the quality and the aesthetic degree of the whole canal project are influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the channel lining concrete cast-in-place method which has the advantages that the constructed channel lining structure is more compact, and the quality and the aesthetic degree of the whole channel project are improved.
The above object of the present invention is achieved by the following technical solutions:
a channel lining concrete cast-in-place method comprises the following steps:
preparing concrete;
installing a template: installing a template on the channel base according to the design requirement and the size and forming a pouring frame;
wetting the concrete bin surface: sprinkling water to the surface of the soil body in the pouring square frame for wetting;
spreading concrete for the first time: paving concrete for the first time in the pouring frame, wherein the thickness of the concrete paved for the first time is 65% -75% of the designed thickness of the channel lining;
vibrating for the first time: firstly, vibrating the periphery of the first layer of concrete by using an inserted vibrator, completely vibrating the first layer of concrete from one side to the other side by using the inserted vibrator, and completely vibrating the first layer of concrete once from one side to the other side by using a flat plate vibrator, wherein the lap joint of the two times of vibration is not less than 10 cm;
paving concrete for the second time: spreading concrete for the second time in the pouring square frame to reach the design thickness of the canal lining;
vibrating for the second time: firstly, vibrating the periphery of the second layer of concrete by using an inserted vibrator, completely vibrating the second layer of concrete from one side to the other side by using the inserted vibrator, and completely vibrating the second layer of concrete once from one side to the other side by using a flat plate vibrator, wherein the lap joint of the two times of vibration is not less than 10 cm;
and (3) leveling treatment: scraping the surface of the concrete subjected to secondary vibration by using a leveling ruler, filling and leveling the concrete on the local concave surface, and scraping the convex surface;
polishing treatment: polishing and extracting slurry from the scraped concrete surface by using a polishing machine, wherein the polishing is performed twice from one side to the other side of the concrete surface;
surface rolling and press polishing: after the concrete surface is subjected to slurry extraction by a polishing machine, polishing by an iron plate, and then, before the concrete surface is initially set, carefully polishing by the iron plate once;
and (3) maintenance treatment: before the concrete is poured and initially set, accumulated water and sunlight solarization in the pouring square frame are avoided, the concrete is covered by a film after being initially set, and the concrete curing is continuously carried out; when the air temperature is higher than 5 ℃, watering and maintaining are carried out, the surface and all the side faces of the concrete are always kept moist, when the air temperature is lower than 5 ℃, the surface of the concrete is not watered, heat preservation and maintenance are carried out, and the concrete maintenance time is not less than 28 days.
By adopting the technical scheme, the soil body mainly comprises the sand stones and has certain water absorption capacity, water is sprayed to the surface of the soil body in advance, so that the water absorption capacity of the sand stones is saturated, and the soil body is not easy to absorb water in concrete after the concrete is poured, so that the pitted surface phenomenon after the concrete is solidified is avoided, and the attractiveness and quality of the whole channel engineering are indirectly improved; compared with the common channel lining pouring method, the method adopts layered construction, each layer of concrete needs to be vibrated once after being paved, the thicker channel lining is vibrated more compactly through the processes of twice paving and twice vibrating, and because the paved concrete has certain stabilizing effect on a template, the thickness of the lower layer of concrete constructed firstly is thicker than that of the upper layer of concrete constructed later, the template is convenient to stabilize so as to prevent the template from being inclined or deviated, so that the channel lining obtained by construction is more accurate in shape and size and more convenient to construct, and simultaneously each layer of concrete adopts an inserted vibrator and a flat vibrator to be vibrated once respectively, so that the concrete is vibrated more compactly; the channel lining surface can be smooth and flat through strickling treatment, polishing treatment and surface-closing calendaring treatment, and the honeycomb pitted surface is avoided, so that the attractiveness and the quality of the whole channel project are improved; the maintenance mode can always keep that the concrete has proper dryness and wettability, so that the concrete can be cured more completely, the phenomenon of dry cracking is effectively avoided, and the attractiveness and quality of the whole channel engineering are indirectly improved.
The invention can be further configured in a preferred example that the distance between the vibration points of the inserted vibrator is controlled within 32-38 cm, and the inserted vibrator is vertically inserted into the concrete, and each vibration time is between 25-40 seconds.
Through adopting above-mentioned technical scheme, bayonet vibrator is more thorough, the effect is better to the vibration of concrete, and the concrete is more closely knit, favourable promotion construction quality.
The invention in a preferred embodiment can be further configured to use a flat vibrator to vibrate the concrete surface slowly, uniformly and continuously, and the speed is controlled to be 0.8-1.2 m/min until the concrete surface does not turn over and sink.
By adopting the technical scheme, the flat plate vibrator can vibrate the concrete more thoroughly, has better effect, and the concrete is more compact, thereby being beneficial to improving the construction quality.
In a preferred example of the present invention, the expansion joints are disposed on two sides of the canal lining, when the canal lining is a slope lining, the reverse filter geotextile is laid on the bottom of the pouring frame before the concrete is spread, the reverse filter geotextile is located on the bottom of the expansion joint, and the concrete is spread in the following sequence: firstly, concrete on two sides of a square frame is paved and poured for fixing the reversed filter geotextile; concrete on the upper side and the lower side of the pouring square frame is paved and poured for fixing the upper side template and the lower side template; and finally spreading concrete in the whole warehouse.
By adopting the technical scheme, the anti-filtration geotextile has a good waterproof effect, and simultaneously has a good sealing effect in cooperation with a subsequently installed pouring square frame, so that in the process of pouring concrete, the concrete is effectively prevented from leaking from a gap at the bottom of the pouring square frame to the outside, and the waterproof effect at an expansion joint is obviously improved; by adopting the method to pave the concrete, the concrete can be used for sequentially and temporarily fixing the reverse filter geotextile, the templates on two sides and the templates above and below, so that the situation that more concrete props up a pouring frame in the whole storehouse paving concrete process is effectively prevented, the problem of secondary construction is effectively avoided, and the construction efficiency is indirectly improved.
The invention may in a preferred example be further configured such that, when the canal lining is in particular a slope lining, the sequence of the vibrations of the plug-in vibrator and the slab vibrator is: vibrating from the bottom side of the pouring square frame to the top side of the pouring square frame.
By adopting the technical scheme, because the uncured concrete has certain fluidity, in the process of pouring the concrete on the slope, because the density of the vibrated concrete is higher, the vibrating sequence is vibrated from the bottom to the top, the concrete on the top of the slope can be prevented from flowing to the bottom, and the rapid forming of the lining of the slope is facilitated.
In a preferred example, the concrete can be further configured to be prepared from the following raw materials in parts by mass: 50-60 parts of water, 90-110 parts of cement, 400 parts of sand 390-containing material, 380 parts of pebbles 360-containing material and 2-4 parts of admixture, wherein the slump of the concrete is between 100-150 mm, the water-cement ratio of the concrete is between 0.50-0.60, and the sand rate of the concrete is between 50.0% and 53.0%.
By adopting the technical scheme, the concrete with the formula has high structural strength after being cured, is not easy to seep water, and has long service life, thereby prolonging the service life of the whole channel engineering.
Aiming at the defects in the prior art, the invention also aims to provide a nonlinear canal lining construction method which has the advantages that the constructed canal lining structure is more compact, and the quality and the aesthetic degree of the whole canal project are improved.
The second aim of the invention is realized by the following technical scheme:
a lining construction method for a nonlinear canal, the canal including a linear region and a curved region, the canal lining comprising: slope lining and bottom surface lining, adopt the segmentation to jump the storehouse method construction to the canal lining in linear type region, adopt the construction of the storehouse pouring method of leading to the storehouse to the canal lining in crooked type region, based on the cast-in-place method of canal lining concrete as above, this nonlinear line type canal lining construction method includes:
and (3) treating a channel base: removing the bad soil and garbage on the surface of the channel base, filling and compacting the pit on the surface of the channel base by using backfill soil, wherein the compaction degree of the backfill soil is not less than 0.92;
laying a lining cushion layer: paving a sand-stone cushion layer on the surface of the trench substrate, wherein the thickness of the sand-stone cushion layer is 5-7 cm;
laying geotextile: laying a reverse filter geotextile on the sandstone cushion layer, wherein the reverse filter geotextile is positioned below the expansion joint;
casting channel lining concrete in situ: firstly, attaching polyethylene closed-cell foam plates to the inner walls of the two sides of the casting square frame provided with the expansion joints, and then casting concrete into the casting square frame.
By adopting the technical scheme, in the treatment of the channel base, the poor soil refers to silt, humus, peat and the like, and the garbage refers to turf, tree roots, miscellaneous branches, construction garbage and the like, so that the surface of the channel base can be cleaner, tidier and smoother through the treatment, and the subsequent laying of a sandstone cushion layer, reversed filtration geotextile and installation and pouring of a square frame are facilitated; the sand-stone cushion layer within the thickness range can effectively prevent the subsequently poured concrete from leaking to the bottom of the canal base, thereby avoiding the problem of slurry leakage and having low material cost; the anti-filter geotextile has a good waterproof effect, and simultaneously has a good sealing effect by matching with a pouring square frame and a polyethylene closed-cell foam board which are installed subsequently, so that in the process of pouring concrete, the concrete is effectively prevented from leaking from a gap at the bottom of the pouring square frame to the outside, and the waterproof effect at an expansion joint is obviously improved; on the basis that the channel lining concrete cast-in-place method has the advantages, the nonlinear channel lining construction method also has the advantages that: the channel lining structure obtained by construction is more compact, so that the quality and the aesthetic degree of the whole channel project are improved; simultaneously, channel lining to the linear type region takes the segmentation to jump the storehouse method construction, be favorable to the setting period of make full use of concrete and the construction of interval segmentation, obviously promoted the efficiency of construction and do not influence the construction quality, and channel lining to the bending type region takes the construction of logical storehouse pouring method, because the surface smoothness of adjacent segmentation butt joint department is hardly controlled in the bending type region, and logical storehouse pouring method is compared with the segmentation to jump the storehouse method, at logical storehouse pouring in-process staff very easy judgement: whether the surface of the abutting joint of the adjacent sub-bins is smooth or not can be controlled and adjusted by a worker at any time, so that the construction quality of the bending area is improved.
In a preferred example, the present invention may be further configured such that the pouring frame is entirely surrounded by a bent steel plate or surrounded by a bent steel plate and a galvanized square steel pipe, and the bent steel plate includes: riser and diaphragm, the diaphragm is located the top outside of pouring the square frame, and the steel sheet of buckling is located the side of pouring the square frame design and has the expansion joint and will anti-geotechnological cloth of straining and compress tightly, and the side of pouring the square frame is fixed through inserting the sign and keeping off, inserts the vertical canal base bottom of inserting of sign, and the laminating of polyethylene obturator cystosepiment in the inside wall of riser.
By adopting the technical scheme, in the process of manufacturing, installing and pouring the square frame, the common galvanized square steel pipe and the common wood template are replaced by the customized bent steel plate for the part with the expansion joint, because the surface of the bent steel plate has smaller friction coefficient compared with a wood template, the concrete galling phenomenon is not easy to generate in the process of disassembling the bent steel plate, the aesthetic degree and the quality of the whole channel engineering are improved, the thickness of the bent steel plate is thinner compared with a galvanized square steel pipe, the gap left after disassembling the bent steel plate is narrower, the polyethylene closed-cell foam plate can completely fill the narrower gap after elastic recovery deformation, the expansion joint obtained by construction cannot be too wide, and the aesthetic degree and the quality of the whole channel engineering are improved, in addition, in the process of disassembling the bent steel plate, the transverse plate further facilitates the application of acting force by workers, and the bent steel plate is pulled out quickly.
The invention in a preferred example may be further configured such that the thickness of the bent steel plate is between 2.5 and 3.5 mm, and the bent steel plate further comprises: the reinforcing plate, the reinforcing plate is located the lower surface of diaphragm and with the riser is parallel, riser, diaphragm and reinforcing plate integrated into one piece.
Through adopting above-mentioned technical scheme, the gusset plate that increases can make the whole structure of buckling the steel sheet more firm, the steel sheet of buckling when concreting is difficult for receiving pressure and warp, the label is inserted in the laminating that the gusset plate can be better simultaneously, conveniently insert and sign and consolidate the steel sheet of buckling, and above-mentioned integrated into one piece's the steel sheet sound construction of buckling is stable, the preparation is convenient (only need buckle by a steel sheet punching press can), go up the steel sheet of buckling of thickness scope design, on the basis that has stronger structural strength, the steel sheet of buckling demolishs the back, the gap that leaves is narrower, polyethylene obturator cystosepiment can fill up this narrower gap completely after elastic recovery warp, the expansion joint that can not make the construction obtain is too wide, the pleasing to the eye degree and the quality of whole channel have further been promoted.
The present invention may in a preferred example be further configured to apply a layer of release agent to the inner surface of the casting box prior to installation of the polyethylene closed cell foam board and cast in place concrete.
By adopting the technical scheme, the inner surface of the pouring square frame can be smoother due to the coated release agent, so that concrete and the polyethylene closed-cell foam board are not easy to adhere to the inner surface of the pouring square frame, and the pouring square frame is further convenient to remove subsequently.
In summary, the invention includes at least one of the following beneficial technical effects:
1. compared with the common channel lining pouring method, the method adopts layered construction, each layer of concrete needs to be vibrated once after being paved, the thicker channel lining is vibrated more compactly through the processes of twice paving and twice vibrating, and because the paved concrete has certain stabilizing effect on a template, the thickness of the lower layer of concrete constructed firstly is thicker than that of the upper layer of concrete constructed later, the template is convenient to stabilize so as to prevent the template from being inclined or deviated, so that the channel lining obtained by construction is more accurate in shape and size and more convenient to construct, and simultaneously each layer of concrete adopts an inserted vibrator and a flat vibrator to be vibrated once respectively, so that the concrete is vibrated more compactly;
2. the anti-geotechnological cloth of straining has good water-proof effects, and the square frame of pouring of the follow-up installation of cooperation has good sealed effect simultaneously, and the in-process of concreting after effectively avoids the concrete to leak to the outside from pouring the gap of square frame bottom, has obviously promoted the water-proof effects of expansion joint department moreover.
Drawings
FIG. 1 is a schematic construction flow chart according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a channel lining after construction and forming in the first embodiment of the present invention;
FIG. 3 is a schematic construction flow chart according to a second embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a casting box in the second embodiment of the present invention;
fig. 5 is a schematic structural view of a bent steel plate according to a second embodiment of the present invention.
Reference numerals: 1. a trench base; 2. a sandstone cushion layer; 3. lining a canal; 31. lining the slope surface; 32. lining the bottom surface; 4. a polyethylene closed cell foam board; 5. pouring a square frame; 6. bending the steel plate; 61. a vertical plate; 62. a transverse plate; 63. a reinforcing plate; 7. a galvanized square steel pipe; 8. inserting a label; 9. and (4) reverse filtering the geotextile.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1 and 2, the channel lining concrete cast-in-place method disclosed by the invention comprises the following steps: the method comprises the following steps of concrete placement S1, template installation S2, concrete cabin surface wetting S3, first spreading of concrete S4, first vibration S5, second spreading of concrete S6, second vibration S7, scraping processing S8, polishing processing S9, surface rolling and calendaring S10 and maintenance processing S11.
Preparing concrete S1: the concrete is prepared from the following raw materials in parts by mass: 50-60 parts of water, 90-110 parts of cement, 400 parts of sand 390-containing material, 380 parts of pebble 360-containing material and 2-4 parts of admixture, wherein the slump of the concrete is between 100-150 mm, the water-cement ratio of the concrete is between 0.50-0.60, and the sand rate of the concrete is between 50.0-53.0%. The concrete with the formula has high structural strength after being cured, is not easy to seep water, and has long service life, thereby prolonging the service life of the whole channel engineering.
Template installation S2: according to the design requirements and the size, a template is installed on the channel foundation 1 and a pouring frame 5 is formed (the pouring frame 5 in the embodiment is shown in fig. 4).
Wetting the concrete bin surface S3: the water is sprayed to the surface of the soil body in the pouring frame 5 to be wet, the soil body mainly comprises the sand stones and has certain water absorption capacity, water is sprayed to the surface of the soil body in advance, the water absorption capacity of the sand stones is saturated, and therefore after concrete is poured, the soil body is not easy to absorb water in the concrete, the pitted surface phenomenon after the concrete is solidified is avoided, and the attractiveness and the quality of the whole channel engineering are indirectly improved.
First paving concrete S4: the concrete is first spread into the pouring box 5, and the thickness of the first spread concrete is 70% of the designed thickness of the canal lining 3, and in other embodiments, the ratio may be 65%, 66%, 67%, 68%, 69%, 71%, 72%, 73%, 74% or 75%.
First vibration S5: firstly, vibrating the periphery of the first layer of concrete by using an inserted vibrator, then completely vibrating the first layer of concrete from one side to the other side by using the inserted vibrator, and then completely vibrating the first layer of concrete once from one side to the other side by using a flat plate vibrator, wherein the lap joint of the two times of vibration is not less than 10 cm.
Second paving concrete S6: and paving concrete for the second time in the pouring frame 5 to reach the design thickness of the canal lining 3.
Second vibration S7: firstly, vibrating the periphery of the second layer of concrete by using an inserted vibrator, then completely vibrating the second layer of concrete from one side to the other side by using the inserted vibrator, and then completely vibrating the second layer of concrete once from one side to the other side by using a flat plate vibrator, wherein the lap joint of the two times of vibration is not less than 10 cm.
In the two vibrating processes, the distance between the vibrating points of the plug-in vibrator is controlled within 32-38 cm, the plug-in vibrator is vertically inserted into concrete, the vibrating time is 25-40 seconds each time, the plug-in vibrator can thoroughly vibrate the concrete, the effect is better, the concrete is more compact, and the construction quality is favorably improved. The flat plate vibrator is adopted to vibrate the surface of the concrete slowly, uniformly and continuously, the speed is controlled to be 0.8-1.2 m/min until the surface of the concrete does not turn over and sink any more, the flat plate vibrator vibrates the concrete more thoroughly, the effect is better, the concrete is more compact, and the construction quality is favorably improved.
Leveling process S8: and scraping the concrete surface subjected to secondary vibration by using a leveling ruler, filling and leveling the concrete on the local concave surface, and scraping the convex surface.
Buffing process S9: and polishing and slurry extracting are carried out on the scraped concrete surface by using a polishing machine, and the polishing is carried out twice from one side to the other side of the concrete surface.
Surface rolling and calendering S10: and after the concrete surface is subjected to slurry extraction by a polishing machine, polishing by using an iron plate, and then, before the concrete surface is initially set, carefully polishing by using the iron plate once.
Curing treatment S11: before the concrete is poured and initially set, accumulated water and sunlight solarization in the pouring square frame 5 are avoided, a film is adopted for covering after the concrete is initially set, and the concrete curing is continuously carried out; when the air temperature is higher than 5 ℃, watering and maintaining are carried out, the surface and all the side faces of the concrete are always kept moist, when the air temperature is lower than 5 ℃, the surface of the concrete is not watered, heat preservation and maintenance are carried out, and the concrete maintenance time is not less than 28 days.
The surface of the canal lining 3 can be flat and smooth without honeycomb pitted surface by strickling, polishing and surface-closing calendaring, thus improving the beauty and quality of the whole canal engineering; the maintenance mode can always keep that the concrete has proper dryness and wettability, so that the concrete can be cured more completely, the phenomenon of dry cracking is effectively avoided, and the attractiveness and quality of the whole channel engineering are indirectly improved.
When the canal lining 3 is a slope lining 31, the vibrating sequence of the plug-in vibrator and the plate vibrator is as follows: the concrete is vibrated from the bottom side of the pouring frame 5 to the top side of the pouring frame 5, and because the uncured concrete has certain fluidity, in the process of pouring the concrete on the slope, because the density of the vibrated concrete is higher, the concrete is vibrated from the bottom to the top in sequence, so that the concrete on the top of the slope can be prevented from flowing to the bottom, and the rapid forming of the lining 31 of the slope is facilitated.
Referring to fig. 2 and 4, the two sides of the canal lining 3 are provided with expansion joints, when the canal lining 3 is a slope lining 31, the reverse filter geotextile 9 is laid at the bottom of the pouring frame 5 before spreading concrete, the reverse filter geotextile 9 is located at the bottom of the expansion joints, and the sequence of spreading concrete is as follows: firstly, concrete on two sides of the square frame 5 is paved and poured for fixing the reversed filter geotextile 9; concrete on the upper side and the lower side of the square frame 5 is paved and poured for fixing the upper side template and the lower side template; and finally spreading concrete in the whole warehouse.
The anti-filtration geotextile 9 has a good waterproof effect, and simultaneously has a good sealing effect in cooperation with a subsequently installed pouring frame 5, so that in the process of later pouring concrete, the concrete is effectively prevented from leaking from a gap at the bottom of the pouring frame 5 to the outside, and the waterproof effect at an expansion joint is obviously improved; by adopting the method to spread the concrete, the reverse filter geotextile 9, the templates on the two sides and the templates above and below can be sequentially and temporarily fixed by utilizing the concrete, so that the casting square frame 5 is effectively prevented from being opened by more concrete in the whole storehouse spreading concrete process, the problem of secondary construction is effectively avoided, and the construction efficiency is indirectly improved.
The implementation principle of the embodiment is as follows: compared with a common channel lining 3 pouring method, adopt the layering construction and each layer of concrete all need carry out once vibration after paving, through twice paving, twice technique of vibrating, make thicker channel lining 3 vibrate closely, because the concrete that paves has certain firm effect to the template, so the thickness of the lower floor concrete of construction earlier will be thicker than the thickness of the upper concrete of back construction, conveniently stabilize the template and in order to prevent that the template is crooked or skew, therefore the channel lining 3 shape size that the construction obtained is more accurate, it is more convenient to construct, each layer of concrete all adopts bayonet vibrator simultaneously, flat vibrator vibrates once respectively, so the concrete is vibrated closely.
Example two
Referring to fig. 2 and 3, in order to disclose a lining construction method for a nonlinear canal, the canal includes a linear region and a curved region, and the canal lining 3 includes: the slope surface lining 31 and the bottom surface lining 32 are constructed by adopting a block skip method aiming at the canal lining 3 in the linear region, and are constructed by adopting a through-bin pouring method aiming at the canal lining 3 in the bending region.
Based on the channel lining concrete cast-in-place method as described in the first embodiment, the nonlinear channel lining construction method includes: trench base treatment S101: removing the bad soil and garbage on the surface of the channel base 1, filling and compacting the pit on the surface of the channel base 1 with backfill soil, wherein the compaction degree of the backfill soil is not less than 0.92; laying a lining cushion layer S102: paving a sand-stone cushion layer 2 on the bottom surface of the trench base 1, wherein the thickness of the sand-stone cushion layer 2 is 5-7 cm; geotextile laying S103: laying a reversed filter geotextile 9 on the sand-gravel cushion layer 2, wherein the reversed filter geotextile 9 is positioned below the expansion joint; channel lining concrete cast-in-place S104: firstly, attaching polyethylene closed-cell foam plates 4 to the inner walls of the two sides of the expansion joint of the pouring frame 5 (the pouring frame 5 in the embodiment is shown in fig. 4), and then pouring concrete into the pouring frame 5.
The sandstone cushion layer 2 is prepared from the following raw materials in parts by mass: 1 part of sand and 1 part of pebble, the fineness modulus of the sand is between 1.6 and 2.0, the particle size of the pebble is between 5 and 20 millimeters, and the gravel cushion layer 2 is paved and molded and then is compacted by a shovel manually, so that the gravel cushion layer 2 prepared by the formula has a good supporting effect, can effectively prevent concrete from leaking slurry, and is beneficial to rapid molding of the canal lining 3.
Before the polyethylene closed-cell foam board 4 and the cast-in-place concrete are installed, a layer of release agent is coated on the inner surface of the pouring square frame 5, and the coated release agent can enable the inner surface of the pouring square frame 5 to be smoother, so that the concrete and the polyethylene closed-cell foam board 4 are not easy to adhere to the inner surface of the pouring square frame 5, and the pouring square frame 5 is further convenient to remove subsequently.
With reference to fig. 4 and 5, the pouring frame 5 is formed by combining and enclosing bent steel plates 6 and galvanized square steel pipes 7, in other embodiments, the pouring frame 5 may also be formed by enclosing bent steel plates 6, and the bent steel plates 6 include: riser 61 and diaphragm 62, diaphragm 62 are located the top outside of pouring square frame 5, and the steel sheet 6 of buckling is located the side of pouring square frame 5 design and has the expansion joint and compress tightly the geotechnological cloth 9 of will straining, and the side of pouring square frame 5 separates through inserting to sign 8 to keep off fixedly, inserts and signs 8 vertical insertion canal base 1 bottoms, and polyethylene closed cell cystosepiment 4 laminates in the inside wall of riser 61.
In the process of manufacturing, installing and pouring the frame 5, for the part designed with the expansion joint, a customized bent steel plate 6 is used for replacing a common galvanized square steel pipe 7 and a common wood template, because the surface of the bent steel plate 6 has smaller friction coefficient compared with a wood template, the concrete galling phenomenon is not easy to generate in the process of disassembling the bent steel plate 6, the aesthetic degree and the quality of the whole channel engineering are improved, the thickness of the bent steel plate 6 is thinner than that of the galvanized square steel pipe 7, the gap left after disassembling the bent steel plate 6 is narrower, the polyethylene closed-cell foam plate 4 can completely fill the narrow gap after elastic recovery deformation, the expansion joint obtained by construction is not too wide, and the aesthetic degree and the quality of the whole channel engineering are improved, in the process of disassembling the bent steel plate 6, the transverse plate 62 also facilitates the application of acting force by a worker, and is beneficial to quickly pulling out the bent steel plate 6.
The thickness of the bent steel plate 6 is 3.0 mm, and in other embodiments, the thickness may also be 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, or 3.5 mm, and the bent steel plate 6 further includes: and a reinforcing plate 63, wherein the reinforcing plate 63 is arranged on the lower surface of the transverse plate 62 and is parallel to the vertical plate 61, and the vertical plate 61, the transverse plate 62 and the reinforcing plate 63 are integrally molded.
The gusset plate 63 that increases can make whole steel sheet 6's of buckling structure more firm, 6 difficult compression of steel sheet of buckling when concreting warp and warp, simultaneously gusset plate 63 can be better the laminating insert sign 8, conveniently insert sign 8 and consolidate the steel sheet 6 of buckling, and above-mentioned integrated into one piece's 6 firm in structure of the steel sheet of buckling is stable, the preparation is convenient (only need buckle by a steel sheet punching press can), go up the steel sheet 6 of buckling of thickness scope design, on the basis that has stronger structural strength, 6 backs of demolising of the steel sheet of buckling, the gap that leaves is narrower, polyethylene obturator cystosepiment 4 can fill up this narrower gap completely after elastic recovery warp, the expansion joint that can not make the construction obtain is too wide, the pleasing to the eye degree and the quality of whole channel engineering have further been promoted.
The implementation principle of the above embodiment is as follows: in the channel base treatment, the bad soil refers to silt, humus soil, peat and the like, and the garbage refers to turf, tree roots, miscellaneous branches, construction garbage and the like, so that the channel base 1 surface can be cleaner, tidier and smoother through the treatment, and the subsequent laying of the sandstone cushion layer 2, the reverse filtration geotextile 9 and the installation and pouring of the square frame 5 are facilitated; the sand-stone cushion layer 2 within the thickness range can effectively prevent the subsequently poured concrete from leaking to the bottom of the channel base 1, avoid the problem of slurry leakage and ensure low material cost; the anti-filter geotextile 9 has a good waterproof effect, and simultaneously has a good sealing effect by matching with a subsequently installed pouring square frame 5 and a polyethylene closed-cell foam plate 4, so that in the process of later pouring concrete, the concrete is effectively prevented from leaking from a gap at the bottom of the pouring square frame 5 to the outside, and the waterproof effect at an expansion joint is obviously improved; on the basis that the channel lining concrete cast-in-place method has the advantages, the nonlinear channel lining construction method also has the advantages that: the channel lining 3 obtained by construction has a more compact structure, so that the quality and the aesthetic degree of the whole channel project are improved; simultaneously, channel lining 3 to the linear type region takes the segmentation to jump the storehouse method construction, be favorable to the setting period of make full use of concrete and the construction of interval segmentation, obviously promoted the efficiency of construction and do not influence the construction quality, and channel lining 3 to the bending type region takes the construction of logical storehouse pouring method, because the surface smoothness of adjacent segmentation butt joint department is hardly controlled in the bending type region, and the logical storehouse pouring method is compared with the segmentation to jump the storehouse method, at the logical storehouse very easy judgement of in-process staff that pours: whether the surface of the abutting joint of the adjacent sub-bins is smooth or not can be controlled and adjusted by a worker at any time, so that the construction quality of the bending area is improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A channel lining concrete cast-in-place method is characterized by comprising the following steps:
preparing concrete;
installing a template: installing a template on the channel base (1) according to the design requirement and the size and forming a pouring frame (5);
wetting the concrete bin surface: sprinkling water to the surface of the soil body in the pouring square frame (5) for wetting;
spreading concrete for the first time: paving concrete for the first time in the pouring frame (5), wherein the thickness of the concrete paved for the first time is 65% -75% of the design thickness of the channel lining (3);
vibrating for the first time: firstly, vibrating the periphery of the first layer of concrete by using an inserted vibrator, completely vibrating the first layer of concrete from one side to the other side by using the inserted vibrator, and completely vibrating the first layer of concrete once from one side to the other side by using a flat plate vibrator, wherein the lap joint of the two times of vibration is not less than 10 cm;
paving concrete for the second time: spreading concrete for the second time in the pouring frame (5) and achieving the design thickness of the canal lining (3);
vibrating for the second time: firstly, vibrating the periphery of the second layer of concrete by using an inserted vibrator, completely vibrating the second layer of concrete from one side to the other side by using the inserted vibrator, and completely vibrating the second layer of concrete once from one side to the other side by using a flat plate vibrator, wherein the lap joint of the two times of vibration is not less than 10 cm;
and (3) leveling treatment: scraping the surface of the concrete subjected to secondary vibration by using a leveling ruler, filling and leveling the concrete on the local concave surface, and scraping the convex surface;
polishing treatment: polishing and extracting slurry from the scraped concrete surface by using a polishing machine, wherein the polishing is performed twice from one side to the other side of the concrete surface;
surface rolling and press polishing: after the concrete surface is subjected to slurry extraction by a polishing machine, polishing by an iron plate, and then, before the concrete surface is initially set, carefully polishing by the iron plate once;
and (3) maintenance treatment: before the concrete is poured and initially set, water accumulation and sunlight solarization in the pouring frame (5) are avoided, the concrete is covered by a film after initial setting, concrete curing is continuously carried out, watering curing is carried out when the temperature is higher than 5 ℃, the surface and all sides of the concrete are kept wet all the time, the surface of the concrete is not watered and heat preservation curing is carried out when the temperature is lower than 5 ℃, and the curing time of the concrete is not less than 28 days;
when the channel lining (3) is a slope lining (31), the vibrating sequence of the plug-in vibrator and the vibrating sequence of the plate vibrator are as follows: vibrating from the bottom side of the pouring square frame (5) to the top side of the pouring square frame (5);
the both sides of channel lining (3) are provided with the expansion joint, and when channel lining (3) specifically are slope lining (31), lay anti-geotechnological cloth (9) of straining in the bottom of pouring square frame (5) earlier before the shop concrete, anti-geotechnological cloth (9) of straining are located the bottom at expansion joint, and the order of shop concrete is: firstly, concrete on two sides of the square frame (5) is paved and poured for fixing the reversed filter geotextile (9); concrete on the upper side and the lower side of the pouring frame (5) is paved and poured for fixing the upper side template and the lower side template; finally spreading concrete in a whole warehouse; pour square frame (5) and all enclose or enclose by steel sheet (6) and the combination of galvanized square steel pipe (7) of buckling by steel sheet (6) of buckling, buckle steel sheet (6) and include: the device comprises a vertical plate (61) and a transverse plate (62), wherein the transverse plate (62) is positioned on the outer side of the top of a pouring square frame (5), a bent steel plate (6) is positioned on the side edge of the pouring square frame (5) with an expansion joint and tightly presses a reversed filter geotextile (9), the side surface of the pouring square frame (5) is separated and fixed through inserting sticks (8), the inserting sticks (8) are vertically inserted into the bottom of a channel base (1), and a polyethylene closed-cell foam plate (4) is attached to the inner side wall of the vertical plate (61);
the thickness of the bent steel plate (6) is between 2.5 and 3.5 millimeters, and the bent steel plate (6) further comprises: the reinforcing plate (63) is arranged on the lower surface of the transverse plate (62) and is parallel to the vertical plate (61), and the vertical plate (61), the transverse plate (62) and the reinforcing plate (63) are integrally formed.
2. The channel lining concrete cast-in-place method of claim 1, wherein the distance between the vibrating points of the insert vibrators is controlled within 32-38 cm, and the insert vibrators are vertically inserted into the concrete for a time of 25-40 seconds each time.
3. The channel lining concrete cast-in-place method according to claim 1, wherein the concrete surface is vibrated slowly, uniformly and continuously by a flat plate vibrator at a speed of 0.8-1.2 m/min until the concrete surface is not turned over and sunk.
4. The channel lining concrete cast-in-place method according to claim 1, characterized in that the concrete is prepared from the following raw materials in parts by mass: 50-60 parts of water, 90-110 parts of cement, 400 parts of sand 390-containing material, 380 parts of pebbles 360-containing material and 2-4 parts of admixture, wherein the slump of the concrete is between 100-150 mm, the water-cement ratio of the concrete is between 0.50-0.60, and the sand rate of the concrete is between 50.0% and 53.0%.
5. A method of constructing a non-linear canal lining, the canal comprising a linear region and a curved region, the canal lining (3) comprising: the slope surface lining (31) and the bottom surface lining (32) are constructed by adopting a block skip method aiming at the canal lining (3) of a linear region, and are constructed by adopting a through-bin pouring method aiming at the canal lining (3) of a curved region, and the nonlinear canal lining construction method comprises the following steps of:
and (3) treating a channel base: removing bad soil and garbage on the surface of the channel base (1), filling and compacting the pit on the surface of the channel base (1) with backfill soil, wherein the compaction degree of the backfill soil is not less than 0.92;
laying a lining cushion layer: paving a sand-stone cushion layer (2) on the bottom surface of the trench base (1), wherein the thickness of the sand-stone cushion layer (2) is 5-7 cm;
laying geotextile: laying a reversed filter geotextile (9) on the sandstone cushion layer (2), wherein the reversed filter geotextile (9) is positioned below the expansion joint;
casting channel lining concrete in situ: firstly, attaching polyethylene closed-cell foam plates (4) to the inner walls of the two sides of the expansion joint arranged in the pouring square frame (5), and then pouring concrete into the pouring square frame (5).
6. The nonlinear canal lining construction method of claim 5, wherein a release agent is coated on the inner surface of the casting block (5) before the polyethylene closed-cell foam sheet (4) and the cast-in-place concrete are installed.
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