CN112942248B - Anti-cracking construction method for anti-seepage face plate of dam - Google Patents
Anti-cracking construction method for anti-seepage face plate of dam Download PDFInfo
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- CN112942248B CN112942248B CN202110431314.7A CN202110431314A CN112942248B CN 112942248 B CN112942248 B CN 112942248B CN 202110431314 A CN202110431314 A CN 202110431314A CN 112942248 B CN112942248 B CN 112942248B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/128—Coherent linings made on the spot, e.g. cast in situ, extruded on the spot
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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Abstract
The application relates to a dam construction technology, in particular to an anti-cracking construction method for an anti-seepage panel of a dam, which comprises the steps of layered construction, template construction, steel bar construction, cooling pipeline arrangement, concrete pouring, temperature control maintenance, interlayer pipeline arrangement and the like; the cooling pipeline with the protective outer pipe is adopted, so that the overall strength of the cooling pipeline is improved, and the problem that the cooling pipeline is easy to damage is solved; the internal and external temperature of the concrete is adjusted in multiple aspects, and the internal and external temperature difference of the concrete is reduced, so that the generation of cracks is reduced, and the whole dam panel achieves the anti-seepage effect.
Description
Technical Field
The application relates to a dam construction technology, in particular to an anti-cracking construction method for an anti-seepage panel of a dam.
Background
Dam construction is an important component in hydraulic engineering. The dam is mainly constructed by reinforced concrete. Because the structural section of the dam is large, the cement consumption is large, and after the dam is poured, the combination of the cement and water can generate a large amount of heat, so that the concrete can expand in volume due to the hydrothermal reaction. In the solidification process, the cooling speed inside and outside the concrete is inconsistent, and the heat dissipation of the outer surface is faster than that of the inner part; the external surface may shrink and the internal expansion may occur, so that the dam cracks, and the normal use of the dam is affected.
At present, the temperature of cracks of the dam caused by hydrothermal treatment of concrete can be solved by controlling the temperature of the concrete in the solidification process in the dam construction process. The concrete temperature control method specifically comprises the following steps: in the pouring process, a cooling water pipe is pre-buried in the reinforced concrete, and when the concrete is solidified, circulating cold water is injected into the cooling water pipe to reduce the internal temperature of the concrete and reduce the temperature difference between the outer surface and the inner surface of the concrete, so that the aim of reducing cracks is fulfilled. And the pre-buried condenser tube adopts the PVC pipe of being convenient for warp to bend more.
In order to reduce the damage to the cooling water pipe in the pouring process, the pre-buried cooling water pipe is mostly a metal pipeline, and the adjacent cooling water pipes are connected through a connecting pipe.
To the correlation technique among the above-mentioned, the inventor thinks that in the pouring process, often adopt the equipment of vibrating to improve the even filling efficiency of concrete, PVC pipe probably is broken by the equipment of vibrating and is broken in this in-process, influences the use of PVC pipe as condenser tube to influence the dam and reduce the construction that the crack appears.
Disclosure of Invention
In order to reduce the problem that cooling use is affected due to the fact that a cooling water pipe is damaged and improve the anti-cracking performance of a dam panel, the application provides an anti-cracking construction method for an anti-seepage panel of a dam.
The application provides an anti-cracking construction method for an anti-seepage panel of a dam, which adopts the following technical scheme:
an anti-cracking construction method for an impermeable face plate of a dam comprises the following steps:
constructing the reinforcing steel bars, namely constructing a reinforcing steel bar structure at a target position according to design requirements;
arranging cooling pipelines, namely arranging a plurality of cooling pipelines in the steel bar structure; each cooling pipeline comprises a protective outer pipe and a folding-resistant inner pipe; the folding-resistant inner pipe is arranged in the protective outer pipe in a penetrating way;
pouring concrete, namely pouring concrete in a steel bar structure pre-embedded with a cooling pipeline;
and (4) controlling temperature and maintaining, namely infusing a medium for cooling in the folding-resistant inner pipe, and connecting cooling equipment communicated with the folding-resistant inner pipe between an inlet and an outlet of the cooling pipeline.
Through adopting above-mentioned technical scheme, adopt the cooling tube who has the protection outer tube, improve cooling tube's bulk strength, improve the easy destroyed problem of cooling tube.
The cooling equipment cools the medium and drives the medium to circularly flow to form a circulating cooling channel, so that the internal temperature of the concrete is reduced by cooling, the internal and external temperature difference is reduced, the generation of cracks is reduced, and the whole dam panel achieves the anti-seepage effect.
Optionally, the protective outer pipe is one of a metal telescopic hose, a metal pipe, a concrete prefabricated pipe or a steel-plastic composite pipe; the folding-resistant inner pipe is a corrugated pipe.
By adopting the technical scheme, the metal flexible hose has a certain free flexible amount and is matched with the corrugated pipe, so that the whole cooling pipeline can be bent and arranged; the metal pipe and the steel-plastic composite pipe have higher hardness, can provide bending force for the folding-resistant inner pipe to resist the equal pressure from vibration equipment or concrete aggregate, and can be used for keeping the folding-resistant inner pipe with a certain axis after the metal pipe and the steel-plastic composite pipe are bent as required; the precast concrete pipe is similar to the poured concrete in material and has similar expansion coefficient, and the crack that appears because of the difference of the shrinkage of the concrete shrinkage and the cooling pipeline after the temperature-controlled maintenance is accomplished can be reduced to the resistant inner tube of rolling over of cooperation.
Optionally, the construction method further comprises template construction, wherein a pouring template is erected on the outer side of the target position according to design requirements; the pouring template comprises a plurality of template units, and a cavity channel for controlling temperature is arranged at one side of the template units close to the inner side; the cavities of different template units are communicated through template connecting pipes to form a template temperature control pipeline; the outer side of the template unit is provided with an embedding groove, and the heat-insulation board is detachably mounted in the embedding groove.
By adopting the technical scheme, the heat preservation of the dam panel by the pouring template can be facilitated by the template temperature control pipeline, the reduction of the temperature difference between the inside and the outside of concrete in the dam panel is facilitated, and the occurrence of cracks is reduced.
In actual use, the cavity channels connected with different template units can be selected according to requirements to form different template temperature control pipelines; and then directly infusing a temperature control medium into the template temperature control pipeline, or adjusting the temperature of the pouring template by using other temperature control equipment. Whether the insulation board is installed in the caulking groove can be selected according to requirements.
Optionally, the temperature-controlled maintenance step further comprises communicating the template temperature-controlled pipeline with an outlet of the folding-resistant inner pipe.
By adopting the technical scheme, in the temperature-controlled maintenance process, the interior of the dam panel finished after the concrete pouring step is cooled through the cooling pipeline, and the exterior of the dam panel is insulated through the pouring template, so that the temperature difference between the interior and the exterior of the concrete is reduced. And the medium flowing out of the outlet of the cooling pipeline passes through the interior of the concrete with higher temperature to realize heat exchange, and the temperature of the medium is generally higher than that of the exterior of the concrete. At the moment, the flowing medium is conveyed to the template temperature control pipeline again, the template unit can be directly heated and heated, the heat preservation requirement of the pouring template on the outer portion of concrete is improved, meanwhile, the temperature of the medium flowing out through the outlet of the cooling pipeline is reasonably recycled, and energy is saved.
Optionally, the pouring template is connected with a template temperature control device; the template temperature control equipment is communicated with the template temperature control pipeline through a temperature control medium.
By adopting the technical scheme, the temperature control medium can be conveyed to the template temperature control pipeline through the template temperature control equipment, and is used for adjusting the temperature of the template unit through the template temperature control pipeline, so as to adjust the ambient temperature in the inner space of the pouring template. For example, in the temperature-controlled curing step, the concrete outside of the dam panel can be insulated in the mode, so that the temperature difference between the inside and the outside of the concrete is reduced; in the concrete pouring step, the environment temperature of the inner side of the pouring template can be reduced through the mode, the concrete pouring temperature is reduced, the highest temperature of the concrete after the concrete pouring is finished is further reduced, the temperature difference between the inside and the outside of the concrete is reduced, and cracks caused by the temperature difference between the inside and the outside of the concrete are reduced.
Optionally, the construction method further comprises the step of layering construction, wherein the panel is divided into at least two bin layers along the elevation direction; each bin layer is respectively subjected to steel bar construction, cooling pipeline arrangement, concrete pouring and temperature control maintenance;
when the temperature-controlled maintenance step of the lower bin layer reaches the maintenance threshold, constructing the reinforcing steel bars of the upper bin layer;
the steel bar structure positioned on the upper bin layer is connected with the steel bar structure reserved on the lower bin layer; the inlet and outlet of the cooling pipeline on the lower bin layer extend to the upper side of the upper bin layer.
By adopting the technical scheme, the dam panel is used as an important structure for intercepting running water and belongs to mass concrete, so that the dam panel is divided into at least two bin layers along the elevation direction, and after the temperature-controlled maintenance of the bin layer positioned below reaches the maintenance threshold value, the construction of the bin layer positioned above is carried out, the maintenance effect of the dam panel can be effectively improved, the temperature difference inside and outside the concrete in the maintenance process is reduced, and cracks are reduced. The maintenance threshold value can be set according to parameters such as height, length, width or concrete proportion of the dam panel warehouse layer.
And the reinforcing steel bar structures between the adjacent warehouse layers are fixedly connected, so that the integral connection strength of the dam panels can be ensured.
The inlet and the outlet of the cooling pipeline are positioned above the upper bin layer, so that the interior of the concrete positioned on the lower bin layer can be conveniently cooled and maintained continuously.
Optionally, the layered construction further comprises laying an interlayer pipeline on the upper surface of the lower storage layer along the span direction parallel to the dam panel; and the inlet and the outlet of the interlayer pipeline are connected with interlayer temperature control equipment.
By adopting the technical scheme, after the concrete pouring step of the upper bin layer is completed, the upper surface of the upper bin layer is in an exposed state, heat can be preserved by covering with geotextile and the like, and the heat can be preserved by the outer side wall of the upper bin layer through a template or geotextile and the like, so that the difference between the internal temperature and the external temperature in the concrete curing process of the bin layer is reduced; but the lower part of the bin layer is directly connected with the bin layer positioned below, and a temperature difference exists between the two. The concrete on the upper bin layer has the temperature difference between the inside and the outside of the concrete and the temperature difference between the upper bin layer and the lower bin layer, and concrete cracks can be generated by the two temperature differences; the former temperature difference accessible is placed the inside cooling pipe in the concrete in and is cooled down, and the pipeline is controlled temperature between the later temperature difference accessible layer.
Optionally, the interlayer pipeline comprises an interlayer inner pipe and an interlayer outer pipe; a capsule capable of breaking the wall is filled between the interlayer inner tube and the interlayer outer tube, and joint filling glue is arranged in the capsule; the capsule has a wall-broken structure; the interlayer outer pipe is provided with a gap for the joint filling glue to penetrate to the outer side of the interlayer outer pipe.
By adopting the technical scheme, in the temperature control maintenance step, the interlayer outer pipe has the function of protecting the interlayer inner pipe, and the interlayer inner pipe is ensured to be smoothly matched with interlayer temperature control equipment to meet the temperature control requirement between the warehouse floors. After the temperature-control maintenance step is completed, the pressure on the interlayer inner tube can be increased to force the capsule to be extruded between the interlayer outer tube and the interlayer inner tube, so that the wall-broken structure punctures the side wall of the capsule, the joint filling glue in the capsule overflows and flows out of the interlayer outer tube through the interlayer outer tube, the gaps possibly existing between the interlayer outer tube and the adjacent bin layers are filled, the cracks are reduced, and the anti-permeability performance is improved.
Optionally, the wall-breaking structure comprises a piercing block embedded in the capsule; the outer surface of the puncturing block is outwards protruded with a convex puncture which is enough to puncture the side wall of the capsule; the length of the convex thorns is less than the sum of the side wall of the capsule and the side wall of the inner tube between layers.
By adopting the technical scheme, the side wall of the capsule is punctured by the convex puncture of the puncture block, so that the joint filling glue in the capsule can smoothly flow out; meanwhile, the length of the convex thorns is less than the sum of the side wall of the capsule and the side wall of the interlayer inner tube, so that the damage to the interlayer inner tube can be reduced.
Optionally, a plurality of wireless temperature measuring units located at different positions are distributed in the steel bar structure; each wireless temperature measuring unit is provided with an independent position mark.
Through adopting above-mentioned technical scheme, utilize wireless temperature measurement unit can more clearly acquire the concrete temperature of each inside position of concrete, be convenient for according to the temperature of the concrete temperature control cooling pipe who acquires.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the cooling pipeline with the protective outer pipe is adopted, so that the overall strength of the cooling pipeline is improved, and the problem that the cooling pipeline is easy to damage is solved;
2. the internal and external temperature of the concrete is adjusted in multiple aspects, and the internal and external temperature difference of the concrete is reduced, so that the generation of cracks is reduced, and the whole dam panel achieves the anti-seepage effect.
Drawings
FIG. 1 is a flow chart of a construction method of the present application;
FIG. 2 is a schematic view of the dam panel construction of the present application;
FIG. 3 is a schematic view of a cast-in-place form of the present application;
FIG. 4 is a schematic view of the construction of the template temperature control conduit of the present application;
FIG. 5 is a schematic view of the structure of the reinforcing steel bar, the cooling pipe, and the wireless temperature measuring unit;
FIG. 6 is a schematic view of the cooling channel configuration of the present application;
FIG. 7 is a cross-sectional structural schematic view of a cooling duct of the present application;
FIG. 8 is a schematic view of the present application of the interlayer piping structure;
FIG. 9 is a schematic cross-sectional view of a pipeline between layers according to the present application.
Description of reference numerals: 1. a bin layer; 11. a water stop plate;
2. pouring a template; 21. a template unit; 211. an abutment side; 212. supporting and supporting; 213. a support frame; 214. a lumen; 215. caulking grooves; 22. connecting a template with a pipe; 23. a thermal insulation board; 24. a strut; 25. a template temperature control pipeline;
3. a cooling duct; 31. a protective outer tube; 32. a folding-resistant inner tube;
4. a steel bar structure; 41. a concrete bar;
5. a wireless temperature measuring unit;
6. a cooling device;
7. an interlayer pipeline; 71. an interlayer inner pipe; 72. an interlayer outer tube; 73. a capsule; 731. joint filling glue; 74. breaking the wall structure; 741. pricking blocks; 742. convex thorns;
8. a template temperature control device; 9. and (4) interlayer temperature control equipment.
Detailed Description
The present application is described in further detail below with reference to figures 1-9.
The embodiment of the application discloses an anti-cracking construction method for an anti-seepage panel of a dam.
Referring to fig. 1, the anti-cracking construction method of the anti-seepage panel of the dam comprises the construction steps of A010 layering construction, S010 formwork construction, S020 steel bar construction, S030 cooling pipeline 3 arrangement, S040 concrete pouring, S050 temperature control maintenance and the like.
Referring to fig. 1 and 2, the a010 layered construction includes: dividing the panel into at least two cabin layers 1 along the elevation direction according to the structure of the dam panel; and the construction operations of S010 template construction, S020 steel bar construction, S030 cooling pipeline 3 arrangement, S040 concrete pouring and S050 temperature control maintenance are respectively carried out on each warehouse layer 1.
Referring to fig. 2 and 3, the step S010 of formwork construction includes: and erecting a pouring template 2 at the outer side of a target position according to design requirements, wherein the target position can be a dam panel construction position or the upper part of the lower cabin layer 1.
The casting formwork 2 includes a plurality of formwork units 21, each formwork unit 21 has an inner side thereof being an abutting side 211 made of a metal material for abutting against concrete, and the other side thereof being a supporting side 212 provided with a supporting frame 213. The abutment side 211 of the template unit 21 is provided with a channel 214 through at least two side walls of the template.
In this embodiment, the template unit 21 is made of aluminum material, and the aluminum material has high heat conductivity. The cross section of the abutting side 211 of the template unit 21 is rectangular, each template unit 21 is at least provided with two unconnected and crossed cavities 214 penetrating through the opposite side walls, wherein one cavity 214 is horizontal, and the other cavity 214 is vertical.
Referring to fig. 3 and 4, the abutting side 211 of the template unit 21 is provided with an escape area at the inlet and the outlet of each cavity 214, and the cavities 214 of adjacent template units 21 or different template units 21 can be connected by using the template connecting pipe 22 to form the template temperature control pipeline 25. When the cavity 214 is not used, the inlet and outlet of the cavity 214 can be blocked by the sealing plug, so that impurities and the like entering the cavity 214 are reduced, and the construction of the cavity 214 is influenced. Since each template unit 21 has at least two directional channels 214, the channels 214 of different template units 21 can be connected to form template temperature-controlled pipelines 25 with different flow directions according to the temperature control requirement (for example, extending the temperature-controlled path).
The supporting side 212 of the formwork unit 21 is provided with a caulking groove 215, the caulking groove 215 is detachably provided with an insulation board 23, and the insulation board 23 can be a composite board comprising insulation cotton. A locking member may be disposed at a side of the insertion groove 215 close to the supporting frame 213, and when the insulation board 23 is installed in the insertion groove 215, the insulation board 23 is fixed by the locking member.
The adjacent template units 21 can be connected with the supporting frames 213 through the supporting rods 24, so that the pouring template 2 is stably connected.
Referring to fig. 4 and 5, the step S020 of reinforcing steel bar construction includes: and constructing the steel bar structure 4 at the target position according to design requirements. In actual construction, the construction of the template in the step S010 can be carried out simultaneously with the construction of the steel bars in the step S020, and can also be carried out alternatively with the construction of the steel bars in the step S020, so that the binding efficiency of the steel bar structure 4 is improved.
Referring to fig. 4 and 5, the step S030 of laying the cooling pipes 3 includes: a plurality of cooling ducts 33 are arranged in the steel bar structure 4. Before installation, a plurality of concrete strip blocks 41 are fixed between adjacent steel bars, and then the cooling pipeline 3 is laid and fixed on the concrete strip blocks 41, so that the cooling pipeline 3 and the steel bars have a certain interval. Cooling duct 3 is bent along horizontal direction and vertical direction and is laid at the middle part of steel bar structure 4, and cooling duct 3's import and opening all are located steel bar structure 4's top.
In the process of S020 steel bar construction and S030 cooling pipeline 3 arrangement, a plurality of wireless temperature measuring units 5 located at different positions are arranged in the steel bar structure 4; each wireless temperature measuring unit 5 is provided with an independent position mark.
Refer to fig. 6, 7; each cooling duct 3 comprises a protective outer tube 31 and a folding-resistant inner tube 32; the folding-resistant inner pipe 32 is arranged through the protective outer pipe 31. The protective outer pipe 31 is one of a metal telescopic hose, a metal pipe, a concrete prefabricated pipe or a steel-plastic composite pipe; the inner folding-resistant tube 32 may be a corrugated tube made of PVC. The protective outer tube 31 in this embodiment is a metal tube.
Referring to fig. 8 and 9, in the process of constructing the reinforcing steel bars in step S020 and laying the cooling pipes 3 in step S030, the form temperature control device 8 may be used to connect the casting form 2 to communicate with the form temperature control pipes 25 through a temperature control medium. Carry out temperature regulation to template unit 21 through template temperature control pipeline 25, and then to being located the ambient temperature regulation in 2 inboard spaces of pouring template, reduce the ambient temperature who pours 2 inboards of template, can this reduce constructor operational environment's temperature in high temperature weather, reduce steel bar structure 4's temperature.
Referring to fig. 5, the step S040 concrete pouring includes: and pouring concrete in the steel bar structure 4 embedded with the cooling pipeline 3.
Referring to fig. 4, in step S040 concrete pouring, the template temperature control device 8 may be used to connect the pouring template 2 to the template temperature control pipeline 25 through a temperature control medium, so as to reduce the ambient temperature inside the pouring template 2, reduce the concrete pouring temperature, further reduce the maximum temperature of the concrete after the concrete pouring is completed, reduce the difference between the internal temperature and the external temperature of the concrete, and reduce the occurrence of cracks due to the difference between the internal temperature and the external temperature of the concrete.
Referring to fig. 6 and 7, the step S050 of temperature-controlled curing includes: a medium for cooling is infused in the folding-resistant inner pipe 32, and a cooling device 6 communicated with the folding-resistant inner pipe 32 is connected between the inlet and the outlet of the cooling pipeline 3. The cooling device 6 cools the medium and drives the medium to circularly flow to form a circulating cooling channel, so that the temperature inside the concrete is reduced by cooling, the temperature difference inside and outside the concrete is reduced, the generation of cracks is reduced, and the whole dam panel achieves the anti-seepage effect.
To further reduce the difference between the internal and external temperature of the concrete, the template temperature control pipeline 25 may be connected to the outlet of the folding-resistant inner pipe 32. Specifically, the import of resistant inner tube 32 of rolling over communicates in cooling arrangement 6, and the exit linkage of resistant inner tube 32 in the import of template temperature control pipeline 25, and the exit linkage of template temperature control pipeline 25 in cooling arrangement 6 from this forms circulation temperature control passageway that adjusts temperature, does benefit to and reduces the inside temperature of concrete, improves the outside temperature of concrete, reduces the two difference in temperature, reduces the concrete crackle that appears, improves dam panel's impermeability.
Referring to fig. 8, the step a010 of layered construction further includes:
when the temperature-controlled maintenance step of the lower warehouse layer 1 reaches the maintenance threshold, the construction of the reinforcing steel bars of the upper warehouse layer 1 is carried out, the maintenance effect of the dam panel can be effectively improved, the difference between the internal temperature and the external temperature of the concrete in the maintenance process is reduced, and the occurrence of cracks is reduced. The maintenance threshold value can be set according to parameters such as height, length and width of the dam panel warehouse layer 1 or concrete proportion.
The steel bar structure 4 positioned on the upper bin layer 1 is connected with the steel bar structure 4 reserved on the lower bin layer 1; the inlet and outlet of the cooling duct 3 located in the lower plenum 1 extend to above the upper plenum 1.
A water stop plate 11 is arranged between the adjacent bin layers 1, and the water stop plate 11 is used for reinforcing the water stop performance between the adjacent bin layers 1.
Laying an interlayer pipeline 7 on the upper surface of the lower cabin layer 1 along the span direction parallel to the dam panel; independent interlayer pipelines 7 are arranged on two sides of the water stop plate 11.
Referring to fig. 8 and 9, an inlet and an outlet of the interlayer pipeline 7 are connected with an interlayer temperature control device 9. The inlet and the outlet of the interlayer pipeline 7 are both positioned above the steel bar structure 4 of the upper warehouse layer 1.
The interlayer pipe 7 includes an interlayer inner pipe 71 and an interlayer outer pipe 72; a capsule 73 capable of breaking the wall is filled between the interlayer inner tube 71 and the interlayer outer tube 72, and joint filling glue 731 is arranged in the capsule 73; the capsule 73 has a wall-breaking structure 74; the interlayer outer pipe 72 is provided with a gap for the gap filling glue 731 to penetrate to the outer side of the interlayer outer pipe 72, the interlayer outer pipe 72 is a metal mesh pipe in the embodiment, the interlayer inner pipe 71 is an elastic hose, and air with a certain temperature can be conveyed into the interlayer inner pipe 71, so that the temperature difference between the temperature of the cabin layers 1 and the temperature of the concrete in the middle of the cabin layer 1 above the cabin layers is kept in a reasonable range, and the cracks on the lower surface of the cabin layer 1 are reduced.
Referring to fig. 9, the wall-breaking structure 74 includes a piercing section 741 disposed within the capsule 73; the outer surface of the piercing block 741 protrudes outward with a protruding piercing 742 sufficient to pierce the side wall of the capsule 73; the length of the spurs 742 is less than the sum of the side wall of the bladder 73 and the side wall of the inner tube 71 between the layers. After the side wall of the capsule 73 is pierced, the caulking glue 731 flows out from the capsule 73, and penetrates through the interlayer outer tube 72 to fill the space between the adjacent warehouse floors 1. After the side wall of the capsule 73 is punctured, the gap filling glue 731 flows out of the capsule 73, penetrates through the interlayer outer tube 72, and is filled between the adjacent bin layers 1, so that cracks are reduced, and the anti-permeation performance is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. An anti-cracking construction method for an impermeable face plate of a dam is characterized by comprising the following steps:
the construction of the steel bar, namely the construction of the steel bar structure (4) is carried out at the target position according to the design requirement;
the cooling pipelines (3) are distributed, and a plurality of cooling pipelines (3) are distributed in the steel bar structure (4); each cooling pipeline (3) comprises a protective outer pipe (31) and a folding-resistant inner pipe (32); the folding-resistant inner pipe (32) is arranged in the protective outer pipe (31) in a penetrating way;
pouring concrete, namely pouring concrete in the steel bar structure (4) pre-embedded with the cooling pipeline (3);
controlling temperature and maintaining, infusing a medium for cooling in the folding-resistant inner pipe (32), and connecting a cooling device (6) communicated with the folding-resistant inner pipe (32) between an inlet and an outlet of the cooling pipeline (3);
the method also comprises the step of layered construction, wherein the panel is divided into at least two bin layers (1) along the elevation direction; each bin layer (1) is respectively subjected to steel bar construction, cooling pipeline (3) arrangement, concrete pouring and temperature control maintenance;
when the temperature-controlled maintenance step of the lower bin layer (1) reaches a maintenance threshold value, constructing the reinforcing steel bars of the upper bin layer (1);
the steel bar structure (4) positioned on the upper bin layer (1) is connected with the steel bar structure (4) reserved on the lower bin layer (1); the inlet and the outlet of the cooling pipeline (3) of the lower bin layer (1) extend to the upper part of the upper bin layer (1);
the layered construction also comprises an interlayer pipeline (7) arranged on the upper surface of the lower warehouse layer (1) along the span direction parallel to the dam panel; an inlet and an outlet of the interlayer pipeline (7) are connected with interlayer temperature control equipment (9);
the interlayer pipeline (7) comprises an interlayer inner pipe (71) and an interlayer outer pipe (72); a capsule (73) capable of breaking the wall is filled between the interlayer inner tube (71) and the interlayer outer tube (72), and joint filling glue (731) is arranged in the capsule (73); the capsule (73) has a wall-breaking structure (74); the interlayer outer pipe (72) is provided with a gap for the joint filling glue (731) to penetrate to the outer side of the interlayer outer pipe (72).
2. The anti-cracking construction method for the impermeable face plate of the dam as claimed in claim 1, wherein the construction method comprises the following steps: the protective outer pipe (31) is one of a metal pipe, a concrete prefabricated pipe or a steel-plastic composite pipe; the folding-resistant inner pipe (32) is a corrugated pipe.
3. The anti-cracking construction method for the impermeable face plate of the dam as claimed in claim 1, wherein the construction method comprises the following steps: the method also comprises template construction, namely erecting a pouring template (2) at the outer side of a target position according to design requirements; the pouring template (2) comprises a plurality of template units (21), and a cavity (214) for controlling temperature is arranged at one side, close to the inner side, of each template unit (21); the cavities (214) of different template units (21) are communicated through a template connecting pipe (22) to form a template temperature control pipeline (25); the outer side face of the template unit (21) is provided with an embedding groove (215), and the heat preservation plate (23) is detachably mounted in the embedding groove (215).
4. The anti-cracking construction method for the impermeable face plate of the dam as claimed in claim 3, wherein the construction method comprises the following steps: the temperature-controlled maintenance step also comprises the step of communicating the template temperature-controlled pipeline (25) with an outlet of the folding-resistant inner pipe (32).
5. The anti-cracking construction method for the impermeable face plate of the dam as claimed in claim 3, wherein the construction method comprises the following steps: the pouring template (2) is connected with a template temperature control device (8); the template temperature control equipment (8) is communicated with the template temperature control pipeline (25) through a temperature control medium.
6. The anti-cracking construction method for the impermeable face plate of the dam as claimed in claim 1, wherein the construction method comprises the following steps: the wall breaking structure (74) comprises a thorn block (741) arranged in the capsule (73); the outer surface of the puncture block (741) protrudes outwards to form a protruding puncture (742) which is enough to puncture the side wall of the capsule (73); the length of the protruding thorn (742) is smaller than the sum of the side wall of the capsule (73) and the side wall of the interlayer inner tube (71).
7. The anti-cracking construction method for the impermeable face plate of the dam as claimed in claim 1, wherein the construction method comprises the following steps: a plurality of wireless temperature measuring units (5) positioned at different positions are distributed in the steel bar structure (4); each wireless temperature measuring unit (5) is provided with an independent position mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110431314.7A CN112942248B (en) | 2021-04-21 | 2021-04-21 | Anti-cracking construction method for anti-seepage face plate of dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110431314.7A CN112942248B (en) | 2021-04-21 | 2021-04-21 | Anti-cracking construction method for anti-seepage face plate of dam |
Publications (2)
| Publication Number | Publication Date |
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| CN112942248A CN112942248A (en) | 2021-06-11 |
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| CN103669356B (en) * | 2013-11-13 | 2015-10-28 | 雅砻江流域水电开发有限公司 | Large volume normal concrete thick layer casting method |
| CN204098250U (en) * | 2014-09-29 | 2015-01-14 | 盐城市长达建材科技有限公司 | Crack self-healing disassembly-free heat-insulation system |
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