CN112942248B - Anti-cracking construction method for anti-seepage face plate of dam - Google Patents

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

An anti-crack construction method for dam anti-seepage panels

technical field

The present application relates to dam construction technology, and in particular, to a crack-prevention construction method for seepage-proof panels of dams.

Background technique

Dam construction is an important part of water conservancy projects. The dam is mainly constructed of reinforced concrete. Due to the large structural section of the dam and the large amount of cement, the combination of cement and water will generate a lot of heat after the pouring is completed, resulting in hydrothermalization, which may cause the volume of the concrete to expand. During the solidification process, the cooling rate inside and outside the concrete is inconsistent, and the exterior heat dissipation is faster than the interior; the exterior may shrink and the interior expands, which will cause cracks in the dam and affect the normal use of the dam.

At present, during the construction of the dam, the temperature of the concrete during the solidification process can be controlled to solve the above-mentioned temperature of cracks in the dam caused by the hydrothermalization of the concrete. The concrete temperature control method is as follows: during the pouring process, the cooling water pipe is pre-buried inside the reinforced concrete, and then when the concrete is solidified, the circulating cold water is poured into the cooling water pipe to reduce the internal temperature of the concrete and reduce the appearance and appearance of the concrete. The internal temperature difference, in order to achieve the purpose of reducing cracks. Moreover, the pre-buried cooling water pipes are mostly made of PVC pipes that are easy to deform and bend.

In order to reduce the damage to the cooling water pipes during the pouring process, most of the pre-buried cooling water pipes are metal pipes, and the adjacent cooling water pipes are connected by connecting pipes.

In view of the above-mentioned related technologies, the inventor believes that in the pouring process, vibrating equipment is often used to improve the uniform filling efficiency of concrete. During this process, the PVC pipe may be crushed and damaged by the vibrating equipment, which affects the use of the PVC pipe as a cooling water pipe, thereby affecting the Dams reduce construction where cracks appear.

SUMMARY OF THE INVENTION

In order to reduce the problem that the cooling water pipe is damaged and affect the use of cooling, and improve the anti-cracking performance of the dam face, the present application provides a crack-proof construction method for the anti-seepage face of the dam.

A dam anti-seepage panel anti-cracking construction method provided by the application adopts the following technical solutions:

An anti-crack construction method for an anti-seepage panel of a dam, comprising the following steps:

Reinforcement construction, according to the design requirements, the construction of the reinforcement structure is carried out at the target location;

The cooling pipeline is laid, and several cooling pipelines are arranged in the reinforced structure; each of the cooling pipelines includes a protective outer tube and a folding-resistant inner tube; the folding-resistant inner tube is worn through the protective outer tube;

Concrete pouring, pouring concrete in a reinforced structure with pre-embedded cooling pipes;

For temperature control and maintenance, the medium for cooling is infused into the folding-resistant inner tube, and a cooling device connected to the folding-resistant inner tube is connected between the inlet and outlet of the cooling pipeline.

By adopting the above technical solution, a cooling pipe with a protective outer pipe is adopted, the overall strength of the cooling pipe is improved, and the problem that the cooling pipe is easily damaged is improved.

The cooling equipment cools the medium and drives the medium to circulate to form a circulating cooling channel, so as to achieve cooling and reduce the temperature inside the concrete, reduce the temperature difference between the inside and outside, so as to reduce the generation of cracks and make the dam face as a whole achieve anti-penetration effect.

Optionally, the protective outer tube is one of a metal telescopic hose, a metal tube, a concrete prefabricated tube or a steel-plastic composite tube; the folding-resistant inner tube is a corrugated tube.

By adopting the above technical solution, the metal telescopic hose has a certain amount of free expansion and contraction, and with the corrugated pipe, the cooling pipe can be bent and laid out as a whole; Provide resistance to the compressive force from vibrating equipment or concrete aggregates, and if the metal pipe and the steel-plastic composite pipe are bent as required, it can also be used to maintain a certain axis of the bending-resistant inner pipe; The concrete is similar in material and has similar expansion and expansion coefficients. With the folding-resistant inner tube, cracks caused by the difference between the shrinkage of the concrete and the shrinkage of the cooling pipe after the completion of temperature-controlled curing can be reduced.

Optionally, it also includes formwork construction, and a pouring formwork is erected on the outer side of the target position according to design requirements; the pouring formwork includes several formwork units, and the inner side of the formwork unit is provided with a cavity for controlling temperature; The cavities of the formwork unit are connected by connecting formwork and connecting pipes to form a formwork temperature control pipeline; an insert groove is provided on the outer side of the formwork unit, and a heat preservation board is detachably installed in the insert groove.

By adopting the above technical solution, the temperature control pipeline through the formwork can help the heat preservation of the dam face plate by using the pouring formwork, which is beneficial to reduce the temperature difference between the inside and outside of the concrete in the dam face plate, and reduce the occurrence of cracks.

In actual use, the cavities connecting different formwork units can be selected according to requirements to form different formwork temperature control pipes; then the temperature control medium is directly injected into the formwork temperature control pipes, or other temperature control equipment is used to adjust the temperature of the pouring formwork. You can also choose whether to install insulation boards in the embedded grooves according to your needs.

Optionally, the temperature-controlling and curing step further includes connecting the temperature-controlling pipeline of the template with the outlet of the folding-resistant inner tube.

By adopting the above technical solution, in the process of temperature control and maintenance, the interior of the dam face plate completed after the concrete pouring step is cooled and cooled through the cooling pipe, and the outer surface of the dam face plate is kept warm through the pouring formwork, so as to reduce the temperature inside and outside the concrete Difference. The medium flowing out from the outlet of the cooling pipe passes through the concrete with a higher temperature to achieve heat exchange, and the temperature of the medium is generally higher than the temperature outside the concrete. At this time, the flowing medium is transferred to the formwork temperature control pipeline, which can directly heat the formwork unit to increase the heat preservation demand of the pouring formwork on the outside of the concrete. At the same time, the temperature of the medium flowing out through the outlet of the cooling pipeline can be reasonably recycled to save energy.

Optionally, the pouring template is connected with a template temperature control device; the template temperature control device is connected to the template temperature control pipeline through a temperature control medium.

By adopting the above technical solution, the temperature control medium can be transported to the template temperature control pipeline through the template temperature control equipment, which is used to adjust the temperature of the template unit through the template temperature control pipeline, and then adjust the ambient temperature in the inner space of the pouring template. For example, in the temperature control and curing step, the concrete outside of the dam face can be insulated in this way, and the temperature difference between the inside and outside of the concrete can be reduced; in the concrete pouring step, the ambient temperature inside the pouring formwork can be reduced in this way, and the concrete pouring temperature can be reduced. Then, the maximum temperature of the concrete after the concrete is poured is reduced, the temperature difference between the inside and outside of the concrete is reduced, and the occurrence of cracks caused by the temperature difference between the inside and outside of the concrete is reduced.

Optionally, it also includes layered construction, and the panel is divided into at least two warehouse layers along the elevation direction; each of the warehouse layers is respectively subjected to reinforcement construction, cooling pipeline layout, concrete pouring and temperature-controlled maintenance;

After the temperature control and maintenance steps of the warehouse layer below reach the maintenance threshold, the reinforcement construction of the warehouse layer above is carried out;

The reinforced structure located on the upper warehouse layer is connected with the reserved reinforced structure located on the lower warehouse layer; the inlet and outlet of the cooling pipe located on the lower warehouse layer extend to the top located on the upper warehouse layer.

By adopting the above technical solution, the dam face plate, as an important structure for intercepting flowing water, belongs to the mass concrete. Therefore, the dam face plate is divided into at least two warehouse layers along the elevation direction, and after the temperature-controlled maintenance of the warehouse layer below reaches the maintenance threshold, The construction on the upper warehouse floor can effectively improve the maintenance effect of the dam face, reduce the temperature difference between the inside and outside of the concrete during the curing process, and reduce the occurrence of cracks. The maintenance threshold can be set according to parameters such as the height, length, width or concrete ratio of the dam face slab.

The steel structure fixed connection between adjacent warehouse layers can ensure the overall connection strength of the dam face.

The inlet and outlet of the cooling pipe are located above the upper warehouse floor, which is convenient to continue cooling and curing the concrete inside the lower warehouse floor.

Optionally, the layered construction further includes arranging interlayer pipelines on the upper surface of the lower warehouse layer along the span direction parallel to the dam deck; the inlet and outlet of the interlayer pipelines are connected with interlayer temperature control equipment.

By adopting the above technical scheme, after the concrete pouring step is completed on the upper warehouse layer, the upper surface of the upper warehouse layer is in an exposed state, which can be covered by geotextiles for thermal insulation, and the outer side walls can also be insulated by formwork or geotextiles, etc. In this way, the temperature difference between the inside and outside during the curing process of the concrete of the warehouse layer is reduced; however, the bottom of the warehouse layer is directly connected with the warehouse layer located below, and there is a temperature difference between the two. That is to say, at this time, the concrete located on the upper silo layer has the temperature difference between the inside and outside of the concrete and the concrete temperature difference between the upper and lower silo layers. Both of these temperature differences may cause concrete cracks; Cooling and cooling, the latter temperature difference can be controlled by the interlayer pipeline.

Optionally, the interlayer pipeline includes an interlayer inner pipe and an interlayer outer pipe; a wall-breakable capsule is filled between the interlayer inner pipe and the interlayer outer pipe, and a gap filler is arranged in the capsule; The capsule has a wall-breaking structure; the interlayer outer tube is provided with a gap for the seam filling glue to penetrate to the outside of the interlayer outer tube.

By adopting the above technical solution, in the temperature control and maintenance step, the interlayer outer pipe has the function of protecting the interlayer inner pipe, ensuring that the interlayer inner pipe can smoothly cooperate with the interlayer temperature control equipment to complete the temperature control requirements between the warehouse layers. After the temperature control and curing step is completed, the pressure on the interlayer inner tube can be increased to force the capsule to be squeezed between the interlayer outer tube and the interlayer inner tube, so that the wall-breaking structure pierces the side wall of the capsule, making the capsule The caulking glue overflows and flows out to the outside of the interlayer outer pipe through the interlayer outer pipe, filling the possible gaps between the interlayer outer pipe and the adjacent warehouse layers, reducing the occurrence of cracks and improving the anti-permeability performance.

Optionally, the wall-breaking structure includes a thorn block built into the capsule; the outer surface of the thorn block protrudes outwardly with a thorn sufficient to pierce the side wall of the capsule; the length of the thorn is smaller than the length of the side wall of the capsule and the interlayer. The sum of the inner tube side walls.

By adopting the above technical solution, the capsule side wall is pierced by the protruding thorns of the thorn block, so that the sealing glue in the capsule can flow out smoothly; at the same time, the length of the protruding thorn is less than the sum of the capsule side wall and the interlayer inner tube side wall, so it can be Reduce damage to the inner tube between layers.

Optionally, a plurality of wireless temperature measuring units located at different positions are arranged in the steel bar structure; each wireless temperature measuring unit has an independent position identification.

By adopting the above technical solution, the wireless temperature measuring unit can obtain the specific temperature of each position inside the concrete more clearly, and it is convenient to control the temperature of the cooling pipe according to the obtained specific temperature.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. Adopt the cooling pipe with protective outer pipe to improve the overall strength of the cooling pipe and improve the problem that the cooling pipe is easily damaged;

2. Adjust the temperature inside and outside of the concrete in many ways, reduce the temperature difference between the inside and outside of the concrete, so as to reduce the generation of cracks and make the dam face plate achieve the anti-penetration effect as a whole.

Description of drawings

Fig. 1 is the flow chart of the construction method of the present application;

Fig. 2 is the structural schematic diagram of the dam face plate of the present application;

Fig. 3 is the pouring formwork structure schematic diagram of the present application;

Fig. 4 is the template temperature control pipeline structure schematic diagram of the present application;

Fig. 5 is the structural schematic diagram of the steel structure, cooling pipe and wireless temperature measuring unit of the present application;

Fig. 6 is the structural schematic diagram of the cooling channel of the present application;

Fig. 7 is the cross-sectional structural schematic diagram of the cooling pipeline of the present application;

8 is a schematic diagram of the structure of the interlayer pipeline of the present application;

FIG. 9 is a schematic cross-sectional structural diagram of an interlayer pipeline of the present application.

Description of reference numerals: 1. Warehouse layer; 11. Water stop plate;

2. Casting formwork; 21. Formwork unit; 211. Abutting side; 212. Supporting side; 213. Supporting frame; 214. Tunnel; Support rod; 25. Template temperature control pipeline;

3. Cooling pipe; 31. Protective outer pipe; 32. Fold-resistant inner pipe;

4. Reinforced structure; 41. Concrete bar;

5. Wireless temperature measurement unit;

6. Cooling equipment;

7. Interlayer pipe; 71, Interlayer inner pipe; 72, Interlayer outer pipe; 73, Capsule; 731, caulking glue; 74, broken wall structure; 741, thorn block;

8. Template temperature control equipment; 9. Interlayer temperature control equipment.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-9.

The embodiment of the present application discloses an anti-cracking construction method for a dam seepage-proof panel.

Referring to Figure 1, the anti-crack construction method of the dam anti-seepage panel includes the construction steps of A010 layered construction, S010 formwork construction, S020 steel reinforcement construction, S030 cooling pipeline 3 layout, S040 concrete pouring and S050 temperature control maintenance.

Referring to Figure 1 and Figure 2, A010 layered construction includes: according to the structure of the dam faceplate, the faceplate is divided into at least two warehouse layers 1 along the elevation direction; and S010 formwork construction, S020 reinforcement construction, S030 cooling pipeline 3 layout, S040 concrete pouring and S050 temperature control curing construction.

Referring to Figure 2 and Figure 3, step S010 formwork construction includes: erecting a pouring formwork 2 on the outside of the target position according to the design requirements, and the target position can be the dam face plate construction position or the upper part of the lower warehouse floor 1.

The pouring formwork 2 includes a plurality of formwork units 21 , the inner side of each formwork unit 21 is an abutment side 211 made of metal material for abutting against concrete, and the other side is a support side 212 on which a support frame 213 is installed. The abutting side 211 of the template unit 21 is provided with a channel 214 penetrating 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 thermal conductivity. The cross-sectional surface of the abutting side 211 of the template unit 21 is rectangular, and each template unit 21 is provided with at least two non-connected and intersecting channels 214 penetrating the opposite side walls, one of the channels 214 is horizontal, and the other is horizontal. The channel 214 is vertical.

Referring to FIGS. 3 and 4 , the abutting side 211 of the template unit 21 at the inlet and the outlet of each cavity 214 has an avoidance area, and a template can be used between adjacent template units 21 or between the cavities 214 of different template units 21 The connecting pipes 22 are connected to form a template temperature control pipe 25 . When the cavity 214 is not in use, the inlet and the outlet of the cavity 214 can be blocked by sealing plugs to reduce impurities and the like entering the cavity 214 and affect the construction of the cavity 214 . Since each template unit 21 has cavities 214 in at least two directions, according to temperature control requirements (such as extending the temperature control path), the cavities 214 of different template units 21 can be connected to form template temperature control pipes with different flow directions 25.

The support side 212 of the formwork unit 21 is provided with an embedded groove 215, and the embedded groove 215 is detachably installed with a thermal insulation board 23, and the thermal insulation board 23 can be a composite board including thermal insulation cotton. A locking piece can be provided on the side of the inserting groove 215 close to the support frame 213 , and when the heat insulating board 23 is installed in the inserting groove 215 , the heat insulating board 23 is fixed by the locking piece.

The support frame 213 can also be connected between the adjacent formwork units 21 through the struts 24 to stabilize the connection of the pouring formwork 2 .

Referring to FIG. 4 and FIG. 5 , step S020 reinforcement construction includes: performing construction of reinforcement structure 4 at a target location according to design requirements. During actual construction, the template construction in step S010 can be performed simultaneously with the reinforcement construction in step S020 , or it can be performed staggered with the reinforcement construction in step S020 , so as to improve the binding efficiency of the reinforcement structure 4 .

Referring to FIG. 4 and FIG. 5 , the step S030 of laying the cooling pipes 3 includes: laying a plurality of cooling pipes 33 in the reinforced structure 4 . Before installation, a plurality of concrete blocks 41 are used to fix between adjacent steel bars, and then the cooling pipes 3 are laid and fixed on the concrete blocks 41, so that the cooling pipes 3 and the steel bars have a certain interval. The cooling pipe 3 is bent and arranged in the middle of the steel structure 4 along the horizontal direction and the vertical direction, and the inlet and the opening of the cooling pipe 3 are located above the steel structure 4 .

During step S020 reinforcement construction and S030 cooling pipeline 3 laying process, a plurality of wireless temperature measurement units 5 located at different positions are arranged in the reinforcement structure 4; each wireless temperature measurement unit 5 has an independent position identification.

Referring to FIG. 6 and FIG. 7 ; each cooling duct 3 includes a protective outer tube 31 and a folding-resistant inner tube 32 ; 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 folding-resistant inner pipe 32 can be a corrugated pipe made of PVC material. In this embodiment, the protective outer tube 31 is a metal tube.

8 and 9 , during step S020 reinforcement construction and S030 cooling pipeline 3 laying process, the formwork temperature control device 8 can be used to connect the pouring formwork 2 so that it is connected to the formwork temperature control pipeline 25 through the temperature control medium. The temperature of the formwork unit 21 is adjusted through the formwork temperature control pipe 25, thereby adjusting the ambient temperature in the space inside the pouring formwork 2, reducing the ambient temperature inside the pouring formwork 2, and in high temperature weather, the temperature of the working environment of the construction workers can be reduced, reducing the The temperature of the rebar structure 4.

Referring to FIG. 5 , the concrete pouring in step S040 includes: pouring concrete in the steel structure 4 in which the cooling pipes 3 are embedded.

Referring to Fig. 4, in the concrete pouring in step S040, the formwork temperature control device 8 can be used to connect the pouring formwork 2, so that it is communicated with the formwork temperature control pipeline 25 through the temperature control medium, thereby reducing the ambient temperature inside the pouring formwork 2 and reducing the concrete pouring temperature. , and then reduce the maximum temperature of the concrete after the concrete is poured, reduce the temperature difference between the inside and outside of the concrete, and reduce the occurrence of cracks caused by the temperature difference between the inside and outside of the concrete.

Referring to FIGS. 6 and 7 , step S050 temperature control and maintenance includes: injecting a medium for cooling in the folding-resistant inner tube 32 , and connecting the cooling tube connected to the folding-resistant inner tube 32 between the inlet and the outlet of the cooling pipe 3 . equipment 6. The cooling device 6 cools the medium and drives the medium to circulate to form a circulating cooling channel, so as to achieve cooling and reduce the temperature inside the concrete, reduce the temperature difference between the inside and outside of the concrete, so as to reduce the generation of cracks and make the dam face as a whole achieve anti-penetration effect .

In order to further reduce the temperature difference between the inside and outside of the concrete, the temperature control pipe 25 of the formwork can be communicated with the outlet of the folding-resistant inner pipe 32 . Specifically, the inlet of the folding-resistant inner tube 32 is connected to the cooling device 6, the outlet of the folding-resistant inner tube 32 is connected to the inlet of the template temperature control pipeline 25, and the outlet of the template temperature control pipeline 25 is connected to the cooling device 6, thereby forming a cycle The temperature adjustment control channel is beneficial to reduce the internal temperature of the concrete, increase the external temperature of the concrete, reduce the temperature difference between the two, reduce the occurrence of concrete cracks, and improve the anti-penetration performance of the dam face.

Referring to Figure 8, the layered construction in step A010 also includes:

After the temperature control and curing step of the lower warehouse layer 1 reaches the curing threshold, the reinforcement construction of the upper warehouse layer 1 can be carried out, which can effectively improve the maintenance effect of the dam face, reduce the temperature difference between the inside and outside of the concrete during the curing process, and reduce the occurrence of cracks. The maintenance threshold can be set according to the parameters such as the height, length, width or concrete ratio of the dam face slab layer 1.

The reinforced structure 4 located in the upper warehouse layer 1 is connected with the reserved reinforced structure 4 located in the lower warehouse layer 1;

A water stop plate 11 is arranged between the adjacent warehouse layers 1 , and the water stop plate 11 is used to reinforce the water stop performance between the adjacent warehouse layers 1 .

The interlayer pipelines 7 are arranged on the upper surface of the lower silo layer 1 along the span direction parallel to the dam face; independent interlayer pipelines 7 are provided on both sides of the water stop plate 11 .

Referring to FIG. 8 and FIG. 9 , an interlayer temperature control device 9 is connected to the inlet and outlet of the interlayer pipeline 7 . Both the inlet and the outlet of the interlayer pipeline 7 are located above the reinforced structure 4 of the upper warehouse layer 1 .

The interlayer pipeline 7 includes an interlayer inner pipe 71 and an interlayer outer pipe 72; a wall-breakable capsule 73 is filled between the interlayer inner pipe 71 and the interlayer outer pipe 72, and the capsule 73 is provided with a caulking glue 731; 73 has a wall-breaking structure 74; the interlayer outer pipe 72 is provided with a gap for the caulking glue 731 to penetrate to the outside of the interlayer outer pipe 72. In this embodiment, the interlayer outer pipe 72 is a metal mesh pipe, and the interlayer inner pipe 71 is elastic The hose can transport air with a certain temperature into the interlayer inner pipe 71, so as to keep the temperature difference between the temperature between the warehouse layers 1 and the concrete temperature in the middle of the upper warehouse layer 1 within a reasonable range, so as to reduce the temperature of the warehouse layer 1. Cracks appear on the surface.

9, the wall-breaking structure 74 includes a thorn block 741 built into the capsule 73; the outer surface of the thorn block 741 protrudes outwardly with a thorn 742 sufficient to pierce the side wall of the capsule 73; The sum of the side walls of the interlayer inner tube 71 . After the side wall of the capsule 73 is punctured, the seam filling glue 731 will flow out from the capsule 73, pass through the interlayer outer tube 72, and be filled between the adjacent compartment layers 1. After the side wall of the capsule 73 is pierced, the seam filling glue 731 will flow out from the capsule 73, pass through the interlayer outer tube 72, and be filled between the adjacent warehouse layers 1, thereby reducing cracks and improving the anti-permeability.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be included in the protection scope of the present application. Inside.

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.

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