CN114892607B - Assembled dam core wall structure and construction method thereof - Google Patents
Assembled dam core wall structure and construction method thereof Download PDFInfo
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- CN114892607B CN114892607B CN202210603740.9A CN202210603740A CN114892607B CN 114892607 B CN114892607 B CN 114892607B CN 202210603740 A CN202210603740 A CN 202210603740A CN 114892607 B CN114892607 B CN 114892607B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
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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
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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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
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/08—Wall dams
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- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/40—Foundations for dams across valleys or for dam constructions
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
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- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention relates to an assembled dam core wall structure and a construction method thereof, and belongs to the technical field of hydraulic engineering. The concrete mainly comprises a plain concrete cushion layer, a rubber clay building block core wall, a dam foundation gallery and the like. The rubber clay block core wall is mainly formed by building rubber clay blocks according to a certain sequence, the cross section of the rubber clay block core wall is in a compound trapezoid shape, the rubber clay blocks are bonded through rubber adhesives, and transition layers and dam shell rockfill materials are filled on two sides of the rubber clay block core wall. In order to improve the stability of the core wall of the building block, the core wall and the downstream dam surface are made into step-shaped inclined planes. The invention provides a novel dam core wall structure, namely an assembled core wall structure, which has strong scouring resistance and high safety performance, meanwhile, the building blocks are convenient for industrial production, the quality is easy to control, the building efficiency is high, the influence of climate is small, and the waste rocks and clay generated in dam construction can be fully utilized to manufacture rubber clay building blocks, thereby achieving the purposes of economy and environmental protection.
Description
Technical Field
The invention relates to an assembled dam core wall structure and a construction method thereof, and belongs to the technical field of hydraulic engineering.
Background
The earth-rock dam has the advantages of local materials, full utilization of engineering excavating materials, good dam foundation applicability, low engineering investment and the like, so that the earth-rock dam accounts for the first position in most countries in the world. The barrage of China exceeds 98 000, wherein the earth-rock dam accounts for more than 95 percent. According to dam break data statistical analysis in national reservoir dam collapse registration book, the dam break caused by overtopping accounts for 51.5%, the dam break caused by engineering quality problems accounts for 38.5%, and therefore the overtopping and the engineering quality are main factors causing dam break of earth-rock dams. From the accident cause, the main reason of dam break is that the reservoir flood discharge capacity can not meet the requirement of over-standard flood discharge due to over-standard flood caused by extreme strong rainfall. While the level of reservoir operation management has now increased substantially, dam breakages still occur from time to time.
From the perspective of a large number of dam break or danger accidents of the earth and rockfill dam, zhang Shichen considers that the earth and rockfill dam has novel dam top, slope protection and drainage types capable of resisting flood overtopping, and the method has great significance for improving the capacity of resisting over-standard flood of a large-scale small reservoir and reducing the probability of dam break due to flood overtopping.
Therefore, how to improve the anti-collapse capability of the earth and rockfill dam is one of the key measures for reducing the collapse of the earth and rockfill dam.
The easy accident that takes place of current dam clay core wall, for example: seepage damage, contact scouring, sedimentation cracks, scouring damage and the like, and once a core wall has a problem, dam leakage abnormity, deformation abnormity and even dam body burst are easily caused; meanwhile, when the existing core wall is filled, the requirements on the quality, the water content, the rolling equipment and the frequency of clay are very high, and great difficulty is brought to construction. The asphalt concrete core wall has the advantages of good seepage-proofing performance, strong adaptive deformability and easy connection with a riverbed and concrete bases on two banks, but still has the defects of more complex construction procedures, obvious influence of weather, complex stress of the core wall and easy cracking.
Disclosure of Invention
The invention aims to solve the problems, provides an assembled dam core wall structure and a construction method thereof, can fundamentally solve the problems that the dam core wall is easy to leak and damage, break through overtopping and is insufficient in dam slope stability, greatly improves the safety performance of the core wall, reduces the probability of dam break, and improves the construction efficiency.
The technical scheme adopted by the invention is as follows: an assembled dam core wall structure comprises an plain concrete cushion layer 1, a rubber clay building block core wall 2, a dam foundation gallery 3, a dam crest concrete protection layer 6, an L-shaped anti-wave wall 7, a transition layer 8 and rockfill materials 9, wherein a dam foundation seepage-proofing curtain 4 and a dam foundation consolidation grouting hole 5 are arranged below a dam foundation, the plain concrete cushion layer 1 is poured on the dam foundation, the dam foundation gallery 3 is poured on the plain concrete cushion layer 1, the rubber clay building block core wall 2 is built above the dam foundation gallery 3, the transition layer 8 and the rockfill materials 9 are filled in the upper and lower portions of the rubber clay building block core wall 2, the dam crest concrete protection layer 6 is poured on the top of the rubber clay building block core wall 2, the L-shaped anti-wave wall 7 is arranged on the upstream side of the dam crest, the bottom surface of the L-shaped anti-wave wall 7 is poured on the top of the rubber clay building block core wall 2, the rubber clay building block core wall 2 is built by multiple layers of inner and outer overlapping and inner building blocks and staggered joints, adjacent building blocks are connected through rubber adhesives, the rubber clay building block core wall 2 is in a ladder-shaped overall transverse section, and the inclined plane of the upper and the lower dam foundation is a step-shaped.
Specifically, the blocks of the rubber clay block core wall 2 comprise block standard parts 20 and 1/2 block standard parts 21 which are identical in structure, and the area of the 1/2 block standard part 21 is 1/2 of that of the block standard part 20;
the building block standard part 20 is quadrangular and adopts a rubber outer box 201, the rubber inner boxes 202 are mutually nested to form a whole, broken stone clay 207 is filled in the rubber inner boxes 202, the rubber outer box 201 covers the rubber inner boxes 202, the rubber inner boxes 202 are pressed into the rubber outer boxes 201, a rubber adhesive is coated on the outer surfaces of the side surfaces of the rubber inner boxes 202, concave key grooves 203 are formed in the upper bottom surface of the rubber outer box 201, the size of each key groove 203 is identical to that of each key tooth 204 on the lower bottom surface of the rubber inner box 202 in size, the cross sections of the key grooves 203 and the key teeth 204 are circular, the upper bottom surface and the lower bottom surface of the building block standard part 20 are symmetrically and uniformly arranged respectively, sliding grooves 206 are symmetrically formed in the side surfaces of the key grooves 203, the depth extends to the bottom of the key grooves 203, clamping grooves 205 are formed in the bottom of the key grooves 203, the key grooves 205 are circular rings, and the inner radius is identical to that of the key grooves 203.
Preferably, the broken stone clay 207 in the building block standard parts 20 and 1/2 building block standard parts 21 is prepared by mixing broken stones and clay according to a mass ratio of 1.5 to 1.
Preferably, the box walls of the rubber outer box 201 and the rubber inner box 202 of the building block standard 20 and the 1/2 building block standard 21 are made of high-strength rubber with the thickness of 0.5-1cm.
Preferably, the dam foundation gallery 3 is of a reinforced concrete structure, the cross section of the dam foundation gallery 3 is in a door opening shape, concrete is filled between the dam foundation gallery 3 and the rubber clay block core wall 2, and drain holes are formed in the side wall and the top arch of the dam foundation gallery 3 at intervals.
Preferably, the rubber clay block core wall 2 dam body dam abutment and the mountain body can be connected through cast-in-place concrete.
Preferably, the wave wall 7 is L-shaped.
Preferably, tooth walls with the depth of 1 to 2 meters are respectively arranged on the upper and the downstream sides of the bottom plain concrete cushion layer 1.
A construction method of an assembly type dam comprises the following steps:
s1, clearing a foundation, removing riverbed alluvial layer to a designed elevation, and removing slope addendum layers on two sides of an axis of a dam;
s2, constructing a consolidation grouting hole 5 to perform consolidation grouting on the dam foundation;
s3, pouring a plain concrete cushion layer 1 on the dam foundation;
s4, constructing a dam foundation gallery 3 and a door opening-shaped section on the constructed concrete cushion 1;
s5, when the rubber clay block core wall 2 is built, building in layers, wherein each layer is formed every 2-4 m, after building of each layer of blocks is completed, a transition layer 8 and a rock pile material 9 can be filled on the upstream side and the downstream side of the rubber clay block core wall 2, after the construction height of the layer of blocks is reached, the next layer of rubber clay block core wall 2 is constructed, and the process is circulated until the dam crest;
s6, after the dam body is built to a set height, an impervious curtain 4 of the dam foundation can be constructed at the same time;
and S7, after the dam body is constructed to a designed elevation, a concrete protective layer 6 at the top of the dam and the L-shaped wave wall 7 are poured, and the bottom surface of the wave wall 7 is poured on the top of the rubber clay block core wall 2.
Specifically, S1 further includes the following steps:
pouring block standard 20 and 1/2 block standard 21: firstly filling crushed stone clay 207 in the rubber inner box 202, vibrating and compacting, then covering the rubber outer box 201 on the rubber inner box 202, pressing the rubber inner box 202 into the rubber outer box 201 to form a prism, coating a rubber adhesive on the outer surface of the side surface of the rubber inner box 202 before the rubber inner box 202 is pressed into the rubber outer box 201, and ensuring that the rubber outer box 201 and the rubber inner box 202 are tightly adhered to form a complete whole.
The invention has the beneficial effects that:
(1) The outer rubber layer that is of rubber clay building block core wall, the antiscour ability of rubber is strong, can not appear piping and contact washing away, can improve the security performance of core wall greatly, reduces dam break probability by a wide margin. And meanwhile, the permeability of the rubber is very small, so that the permeability of the core wall is greatly reduced, and even if a large number of joints exist in the core wall of the building block, the joints can be compacted under the action of the gravity, the water pressure and the rockfill pressure of the building block, so that the permeability of the joints is very small.
(2) The rubber clay building block core wall is internally filled with compact broken stone clay, and the compressive strength of the rubber clay building block core wall is higher than that of common clay, so that the dam body settlement is lower, and the probability of crack generation is lower.
(3) The building block standard part and the 1/2 building block standard part can be manufactured in a factory shed, are not influenced by weather, and can ensure the compaction degree of vibration. The building block standard part and the 1/2 building block standard part can be manufactured in advance, and the construction efficiency is improved. The building of the building block standard component and the 1/2 building block standard component basically does not need rolling, is little influenced by weather, and has higher hoisting construction speed and more convenience.
(4) The rubber clay building block core wall dam body is simple in structure and can improve the construction speed.
(5) The broken stone clay in the building block standard component and the 1/2 building block standard component can be formed by mixing, vibrating and compacting broken stones and clay formed in the dam building process, the utilization rate of building materials can be improved, the discharge of broken stones is reduced, and waste is turned into wealth.
Drawings
FIG. 1 is a cross-sectional schematic view of a typical dam section of the present invention;
FIG. 2 is a schematic view of a block standard of the present invention;
FIG. 3 is a schematic view of a 1/2 block standard of the present invention;
FIG. 4 is a schematic view of a rubber outer case of the present invention;
FIG. 5 is a schematic view of the rubber inner case of the present invention;
FIG. 6 is a top view of the rubber outer box of the present invention;
figure 7 is a schematic cross-sectional view of a block standard of the present invention.
The reference numbers in the figures are: the dam foundation concrete comprises a plain concrete cushion layer 1, rubber clay building blocks 2, a dam foundation gallery 3, an anti-seepage curtain 4, a dam foundation consolidation grouting hole 5, a dam top concrete protection layer 6, an L-shaped wave wall 7, a transition layer 8, a rockfill material 9, a building block standard part 20, a 1/2 building block standard part 21, a rubber outer box 201, a rubber inner box 202, a key groove 203, a key tooth 204, a clamping groove 205, a sliding groove 206 and broken stone clay 207.
Detailed Description
The invention will be further elucidated with reference to the drawings and examples, without however being limited to the described scope.
Example 1: as shown in fig. 1-7, an assembled dam core wall structure comprises a plain concrete cushion layer 1, a rubber clay block core wall 2, a dam foundation gallery 3, a dam crest concrete protection layer 6, an L-shaped wave wall 7, a transition layer 8 and a rock pile 9, a dam foundation seepage-proofing curtain 4 and a dam foundation consolidation grouting hole 5 are arranged below a dam foundation, the plain concrete cushion layer 1 is poured on the dam foundation, the dam foundation gallery 3 is poured on the plain concrete cushion layer 1, the rubber clay block core wall 2 is built above the dam foundation gallery 3, the transition layer 8 and the rock pile 9 are filled in the upper and lower streams of the rubber clay block core wall 2, the dam crest concrete protection layer 6 is poured on the top of the rubber block core wall 2, the L-shaped wave wall 7 is arranged on the upstream side of the dam crest, the bottom of the L-shaped wave wall 7 is poured on the top of the rubber clay block core wall 2, the rubber block core wall 2 is formed by overlapping the inner and outer layers, the upper and lower staggered joints of adjacent blocks are connected through a rubber adhesive, and the rubber block core wall 2 is in a cross section and a ladder-shaped upper and lower slope.
Further, the blocks of the rubber clay block core wall 2 comprise block standards 20 and 1/2 block standards 21 with the same structures, and the area of the 1/2 block standard 21 is 1/2 of that of the block standard 20;
the building block standard part 20 is in a quadrangular shape, the size can be 2.0m multiplied by 2.0m, the building block standard part 20 is formed by mutually nesting a rubber outer box 201 and a rubber inner box 202 into a whole, broken stone clay 207 is filled in the rubber inner box 202 and is compacted by vibration, then the rubber outer box 201 is covered on the rubber inner box 202, and the rubber inner box 202 is pressed into the rubber outer box 201 to form a prism. Before the rubber inner case 202 is pressed into the rubber outer case 201, a rubber adhesive is coated on the outer surface of the side surface of the rubber inner case 202, so that the rubber outer case 201 and the rubber inner case 202 are tightly adhered to form a complete whole.
The upper bottom surface of the rubber outer box 201 is provided with 4 concave key grooves 203, the size of the key grooves is completely the same as the shape and size of the key teeth 204 on the lower bottom surface of the rubber inner box 202, and the key grooves can be mutually nested. The cross sections of the key grooves 203 and the key teeth 204 are circular, the diameters of the upper bottom edge and the lower bottom edge of the cross sections can be 0.2m, the depth or the height can be 0.2m, and the key grooves and the key teeth are symmetrically and uniformly arranged on the upper bottom surface and the lower bottom surface respectively. The side symmetry of keyway 203 sets up spout 206, and the width can take 0.1m, and the degree of depth extends to the bottom of keyway 203, sets up draw-in groove 205 in the bottom of keyway 203, and draw-in groove 205 is the ring shape, and the inner radius is unanimous with the keyway radius, and the outer radius can take 0.2m, and the height can take 0.1m. The clamping groove 205 is used for providing counter force when the rubber clay building block is hoisted.
The rubber clay block core wall 2 is mainly built by block standards 20, but places with small positions such as corners and the like are built by 1/2 block standards 21.
Further, the broken stone clay 207 in the building block standard parts 20 and 1/2 building block standard parts 21 can be mixed by adopting broken stones and clay according to a mass ratio of 1.5 to 1, and is vibrated and compacted by spraying a proper amount of water.
Furthermore, the box walls of the rubber outer box 201 and the rubber inner box 202 of the building block standard 20 and the 1/2 building block standard 21 are made of high-strength rubber with the thickness of 0.5-1cm.
Further, the dam foundation gallery 3 is of a common reinforced concrete structure, the size of the dam foundation gallery can be 2.5m multiplied by 3.5m, the cross section of the dam foundation gallery is in a door opening shape, concrete is filled between the dam foundation gallery 3 and the rubber clay building block core wall 2, and drain holes are formed in the side wall and the top arch of the dam foundation gallery 3 at intervals.
Further, the dam abutment of the rubber clay block core wall 2 and the mountain can be connected through cast-in-place concrete.
Furthermore, the height of the L-shaped wave wall 7 can be 1.2m, and the thickness can be 0.3m. The thickness of the dam top concrete protective layer 6 can be 0.2m.
Furthermore, the plain concrete cushion layer 1 at the bottom layer is directly poured on a dam foundation, the thickness can be 2 to 4m, tooth walls with the depth of 1 to 2m are respectively arranged on the upper stream side and the downstream side of the plain concrete cushion layer 1, and the anti-skid stability of the plain concrete cushion layer 1 at the bottom layer is improved.
A construction method of an assembled dam core wall comprises the following steps:
s1, clearing a foundation, removing a riverbed alluvial layer to a designed elevation, and removing slope laminates on two sides of an axis of a dam;
s2, constructing a consolidation grouting hole 5 to perform consolidation grouting on the dam foundation;
s3, pouring a plain concrete cushion layer 1 on the dam foundation;
s4, constructing a dam foundation gallery 3 and a door opening-shaped section on the constructed concrete cushion 1;
s5, when the rubber clay block core wall 2 is built, building in layers, wherein each layer is 2-4 m, after building of each layer of blocks is completed, a transition layer 8 and a rockfill material 9 can be filled on the upstream side and the downstream side of the rubber clay block core wall 2, after the construction height of the layer of blocks is reached, the next layer of rubber clay block core wall 2 is constructed, and the process is circulated until the top of the dam;
s6, after the dam body is built to a set height, an impervious curtain 4 of the dam foundation can be constructed at the same time;
and S7, after the dam body is constructed to a designed elevation, a concrete protective layer 6 and a wave wall 7 on the top of the dam are poured, and the bottom surface of the wave wall 7 is poured on the top of the rubber clay block core wall 2.
Specifically, S1 further includes the following steps:
pouring block standard 20 and 1/2 block standard 21: firstly filling crushed stone clay 207 in the rubber inner box 202, vibrating and compacting, then covering the rubber outer box 201 on the rubber inner box 202, pressing the rubber inner box 202 into the rubber outer box 201 to form a prism, coating a rubber adhesive on the outer surface of the side surface of the rubber inner box 202 before the rubber inner box 202 is pressed into the rubber outer box 201, and ensuring that the rubber outer box 201 and the rubber inner box 202 are tightly adhered to form a complete whole.
The rubber clay block core wall 2 is prepared by mixing waste stones generated in the dam construction process with clay, then filling the mixture into a rubber box, sealing the box after compacting through vibration, and forming a block standard part 20 and a 1/2 block standard part 21; the core is then constructed using the block standards 20 and 1/2 block standards 21. The building block standard parts 20 and 1/2 building block standard parts 21 have the advantages of high-pressure strength, strong anti-scouring capability and low permeability, so that the rubber clay building block core wall 2 fundamentally solves the problems that the existing dam core wall is easy to leak and damage, overtopping and bursting, the stability of a dam slope is insufficient, the safety performance of the core wall is greatly improved, the probability of dam bursting is reduced, and the construction efficiency is improved.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (7)
1. The assembled dam core wall structure is characterized by comprising a plain concrete cushion layer (1), a rubber clay building block core wall (2), a dam foundation gallery (3), a dam crest concrete protective layer (6), an L-shaped wave wall (7), a transition layer (8) and a rockfill material (9), wherein a dam foundation seepage-proof curtain (4) and a dam foundation consolidation grouting hole (5) are arranged below a dam foundation, the plain concrete cushion layer (1) is poured on the dam foundation, the dam foundation gallery (3) is poured on the plain concrete cushion layer (1), the rubber clay building block core wall (2) is built above the dam foundation gallery (3), the upper and lower streams of the rubber clay building block core wall (2) are filled with a transition layer (8) and rockfill materials (9), a dam crest concrete protection layer (6) is poured on the top of the rubber clay building block core wall (2), an L-shaped wave wall (7) is arranged on the upstream side of the dam crest, the bottom surface of the L-shaped wave wall (7) is poured on the top of the rubber clay building block core wall (2), the rubber clay building block core wall (2) is formed by building a plurality of layers of rubber clay building blocks which are in inside and outside lap joint and staggered from top to bottom, adjacent building blocks are connected through a rubber adhesive, the whole cross section of the rubber clay building block core wall (2) is in a compound ladder shape, and the dam surfaces of the upper and lower streams are step-shaped inclined planes;
the building blocks of the rubber clay building block core wall (2) comprise building block standard parts (20) and 1/2 building block standard parts (21) which are the same in structure, and the width of the 1/2 building block standard part (21) is 1/2 of the building block standard part (20);
building block standard component (20) adopts the quadrangular shape and adopts outer rubber box (201), box (202) nests each other and forms wholly in the rubber, box (202) the inside is filled with rubble clay (207) in the rubber, outer rubber box (201) lid is on box (202) in the rubber, box (202) is impressed in the rubber outside box (201) the inside, scribble the rubber adhesive on the side surface of box (202) in the rubber, the last bottom surface of outer rubber box (201) sets up concave keyway (203), the size of keyway (203) and the key tooth (204) shape of box (202) bottom surface in the rubber, the size is the same completely, it is nested each other, the cross section of keyway (203) and key tooth (204) is circular, the upper and lower bottom surfaces of building block standard component (20) are respectively symmetrical evenly arranged, the side symmetry of keyway (203) sets up spout (206), the degree of depth extends to the bottom of keyway (203), the bottom of keyway (203) sets up draw-in groove (205), keyway (205) is the ring shape, interior radius is the same with keyway (203) radius.
2. The fabricated dam core wall structure of claim 1, wherein: the broken stone clay (207) in the building block standard part (20) and the 1/2 building block standard part (21) is mixed by broken stones and clay according to the mass ratio of 1.5 to 1, and is vibrated and compacted by sprinkling appropriate amount of water.
3. The fabricated dam core wall structure of claim 1, wherein: the wall of the rubber outer box (201) and the wall of the rubber inner box (202) of the building block standard part (20) and the 1/2 building block standard part (21) are made of high-strength rubber with the thickness of 0.5-1cm.
4. The fabricated dam core wall structure of claim 1, wherein: the dam foundation gallery (3) is of a reinforced concrete structure, the cross section of the dam foundation gallery is in a door opening shape, concrete is filled between the dam foundation gallery (3) and the rubber clay building block core wall (2), and drain holes are formed in the side wall and the crown of the dam foundation gallery (3) at intervals.
5. The fabricated dam core wall structure of claim 1, wherein: the dam body dam abutment of the rubber clay block core wall (2) is connected with the mountain through cast-in-place concrete.
6. The fabricated dam core wall structure of claim 1, wherein: tooth walls with the depth of 1-2 meters are respectively arranged on the upper and the downstream sides of the bottom plain concrete cushion layer (1).
7. A construction method of an assembled dam core wall structure is characterized in that: the method comprises the following steps:
s1, clearing a foundation, removing riverbed alluvial layer to a designed elevation, and removing slope addendum layers on two sides of an axis of a dam;
s2, constructing a consolidation grouting hole (5) to perform consolidation grouting on the dam foundation;
s3, pouring a plain concrete cushion layer (1) on the dam foundation;
s4, constructing a dam foundation gallery (3) and a door opening-shaped section on the constructed plain concrete cushion layer (1);
s5, building the rubber clay block core wall (2) layer by layer, wherein each layer is 2-4 m, after building of each layer of blocks is completed, a transition layer (8) and a rockfill material (9) can be filled on the upstream and downstream sides of the rubber clay block core wall (2), after the construction height of the layer of blocks is reached, the next layer of rubber clay block core wall (2) is constructed, and the process is circulated until the top of the dam;
s6, when the dam body is built to a set height, an impervious curtain (4) of the dam foundation can be constructed at the same time;
s7, after the dam body is constructed to a designed elevation, a concrete protective layer (6) at the top of the dam and the L-shaped wave wall (7) are poured, and the bottom surface of the L-shaped wave wall (7) is poured on the top of the rubber clay block core wall (2);
the building blocks of the rubber clay building block core wall (2) comprise building block standard parts (20) and 1/2 building block standard parts (21) which are the same in structure, and the width of the 1/2 building block standard part (21) is 1/2 of the building block standard part (20);
before S1, the method also comprises the following steps:
pouring building block standard parts (20) and 1/2 building block standard parts (21): firstly filling broken stone clay (207) in the rubber inner box (202), vibrating tightly, then covering the rubber outer box (201) on the rubber inner box (202), pressing the rubber inner box (202) into the rubber outer box (201) to form a prism, coating a rubber adhesive on the outer surface of the side surface of the rubber inner box (202) before the rubber inner box (202) is pressed into the rubber outer box (201), and ensuring that the rubber outer box (201) and the rubber inner box (202) are tightly adhered to form a complete whole.
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