CN114892607A - 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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- CN114892607A CN114892607A CN202210603740.9A CN202210603740A CN114892607A CN 114892607 A CN114892607 A CN 114892607A CN 202210603740 A CN202210603740 A CN 202210603740A CN 114892607 A CN114892607 A CN 114892607A
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000004927 clay Substances 0.000 claims abstract description 78
- 239000004567 concrete Substances 0.000 claims abstract description 42
- 230000007704 transition Effects 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 62
- 239000004575 stone Substances 0.000 claims description 17
- 238000007596 consolidation process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000011241 protective layer Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 6
- 238000009991 scouring Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 206010003671 Atrioventricular Block Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- 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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- 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
- E02D27/40—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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- 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 building block core wall is mainly formed by building rubber clay building blocks according to a certain sequence, the cross section is in a duplex trapezoid shape, the rubber clay building blocks are bonded through a rubber adhesive, and a transition layer and dam shell rockfill are filled on two sides of the rubber clay building 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 in China exceeds 98000, 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%, and the dam break caused by engineering quality problems accounts for 38.5%, so that overtopping and engineering quality are main factors causing dam break of earth and rockfill 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 increased substantially today, dam breakages still occur from time to time.
From the view of a large number of dam break or accident accidents of the earth and rockfill dam, Zhang Shi considers that the earth and rockfill dam has novel dam crest, slope protection and drainage type which can resist flood overtopping, and has great significance for improving the capability of a large-scale small reservoir in resisting over-standard flood and reducing the probability of flood overtopping and dam break.
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 existing dam clay core wall is easy to have accidents, such as: seepage damage, contact scouring, settlement cracks, scouring damage and the like, and once a core wall has a problem, the dam is easy to cause abnormal seepage and deformation, even the dam body breaks; 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 by 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 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 rockfill material 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 rockfill material 9 are filled at the upper and lower parts of the rubber clay block core wall 2, the dam crest concrete protection layer 6 is poured at the top of the rubber clay block core wall 2, the L-shaped wave wall 7 is arranged at the upper side of the dam crest, the bottom surface of the L-shaped wave wall 7 is poured at the top of the rubber clay block core wall 2, the rubber clay block core wall 2 is formed by building a plurality of layers of building blocks which are overlapped inside and outside and are staggered, and the upper and lower parts are connected by a rubber adhesive, the rubber clay block core wall 2 is in a compound trapezoid shape on the whole cross section, and the dam faces of the upstream dam and the downstream dam are step-shaped inclined planes.
Specifically, the blocks of rubber clay block core wall 2 comprise block standard 20 and 1/2 block standard 21 of the same structure, and the area of 1/2 block standard 21 is 1/2 of block standard 20;
the building block standard part 20 is quadrangular and adopts a rubber outer box 201, the rubber inner box 202 is nested with each other to form a whole, broken stone clay 207 is filled in the rubber inner box 202, the rubber outer box 201 covers the rubber inner box 202, the rubber inner box 202 is pressed into the rubber outer box 201, a rubber adhesive is coated on the outer surface of the side surface of the rubber inner box 202, the upper bottom surface of the rubber outer box 201 is provided with a concave key groove 203, the size of the key groove 203 is identical to the shape and size of the key tooth 204 on the lower bottom surface of the rubber inner box 202, the cross sections of the key groove 203 and the key tooth 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, the side surface of the key groove 203 is symmetrically provided with sliding grooves 206, the depth extends to the bottom of the key groove 203, the bottom of the key groove 203 is provided with a clamping groove 205, the clamping groove 205 is annular, and the inner radius is identical to the radius of the key groove 203.
Preferably, the broken stone clay 207 in the building block standard component 20 or 1/2 is prepared by mixing broken stones and clay according to the mass ratio of 1.5: 1-1: 1, and spraying a proper amount of water to vibrate and compact.
Preferably, the rubber outer box 201 and the rubber inner box 202 of the building block standard 20 and 1/2 are made of high-strength rubber with the thickness of 0.5-1 cm.
Preferably, 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.
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, the upper and lower sides of the bottom plain concrete cushion layer 1 are respectively provided with tooth walls with the depth of 1-2 meters.
A construction method of an assembly type dam comprises the following steps:
s1, clearing the foundation, removing the riverbed alluvial layer to a designed elevation, and removing the slope lamination layers on the two sides of the dam axis;
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 2-4 m is one layer, 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 dam crest;
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;
and S7, after the dam body is constructed to the designed elevation, pouring the concrete protective layer 6 at the top of the dam and the L-shaped wave wall 7, and pouring the bottom surface of the wave wall 7 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 layer of rubber clay building block heart wall is the rubber layer, and the antiscour ability of rubber is strong, can not appear piping and contact and erode, can improve the security performance of heart wall greatly, reduces the 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 construction efficiency is improved. The building of the building block standard part and the 1/2 building block standard part basically does not need rolling, is slightly influenced by weather, and has higher hoisting construction speed and more convenience.
(4) The rubber clay block core wall dam body has a simple structure, and the construction speed can be improved.
(5) The broken stone clay in the building block standard component and the 1/2 building block standard component can be formed after the broken stone and the clay that form in the dam construction process are mixed and vibrated compactly, the utilization rate of building materials can be improved, the emission of the broken stone is reduced, and waste is changed 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 an 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 module 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 crest concrete protection layer 6, an L-shaped wave wall 7, a transition layer 8, a rockfill material 9, building block standard parts 20, 1/2 building block standard parts 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 described with reference to the following figures and examples, without however restricting the scope of the invention thereto.
Example 1: as shown in figures 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 at the upper and lower positions of the rubber clay block core wall 2, the dam crest concrete protection layer 6 is poured at the top of the rubber block core wall 2, the L-shaped wave wall 7 is arranged at the upper side of the dam crest, the bottom surface of the L-shaped wave wall 7 is poured at the top of the rubber clay block core wall 2, the rubber block clay core wall 2 is built by a plurality of layers of building blocks which are overlapped and staggered, the adjacent blocks are connected through a rubber adhesive, the overall cross section of the rubber clay block core wall 2 is in a compound trapezoid shape, and the upstream dam face and the downstream dam face are both step-shaped inclined planes.
Further, the blocks of rubber clay block core 2 comprise block standard 20 and 1/2 block standard 21 of the same construction, the area of block standard 21 1/2 being 1/2 of 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 0.1 m. 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 constructed by block standards 20, but places with small positions such as corners and the like are constructed by 1/2 block standards 21.
Further, the broken stone clay 207 in the building block standard parts 20 and 1/2 and the building block standard part 21 can be prepared by mixing broken stones and clay according to the mass ratio of 1.5: 1-1: 1, and spraying a proper amount of water to carry out vibration compaction.
Furthermore, the box walls of the rubber outer box 201 and the rubber inner box 202 of the building block standard 20 and 1/2 building block standard 21 are made of high-strength rubber with the thickness of 0.5-1 cm.
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.
Further, the L-shaped wave wall 7 can be 1.2m in height and 0.3m in thickness. The thickness of the dam top concrete protective layer 6 can be 0.2 m.
Further, the plain concrete cushion layer 1 of the bottom layer is directly poured on the dam foundation, the thickness can be 2-4 m, tooth walls with the depth of 1-2 m are arranged on the upper side and the lower side of the plain concrete cushion layer 1 respectively, and the anti-sliding stability of the plain concrete cushion layer 1 of the bottom layer is improved.
A construction method of an assembled dam core wall comprises the following steps:
s1, clearing the foundation, removing the riverbed alluvial layer to a designed elevation, and removing the slope lamination layers on the two sides of the dam axis;
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 2-4 m is one layer, 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 elevation of the layer of blocks is constructed, the next layer of rubber clay block core wall 2 is constructed, and the process is circulated until the dam crest;
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;
and S7, after the dam body is constructed to the designed elevation, pouring the concrete protective layer 6 and the wave wall 7 on the top of the dam, wherein 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 20 and a block standard 1/2 21; the core is then constructed using block modules 20 and 1/2 block modules 21. The building block standard parts 20 and 1/2 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, breaks due to overtopping and is insufficient in dam slope stability, the safety performance of the core wall is greatly improved, the probability of dam breaking 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 (9)
1. An assembled dam core wall structure is characterized by comprising a plain concrete cushion layer (1), a rubber clay 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 rock-fill material (9), a dam foundation anti-seepage 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-fill material (9) are filled in the upper and lower reaches of the rubber clay block core wall (2), the dam crest concrete protective layer (6) is poured on the top of the rubber clay block core wall (2), the L-shaped wave wall (7) is arranged on the upper 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 clay block core wall (2) is formed by building a plurality of layers of rubber clay blocks which are lapped inside and outside and staggered from top to bottom, adjacent blocks are connected through a rubber adhesive, the whole cross section of the rubber clay block core wall (2) is in a compound trapezoid shape, and the dam faces of the upper and lower reaches are step-shaped inclined planes.
2. The fabricated dam of claim 1, wherein: 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 identical in structure, wherein the width of the 1/2 building block standard parts (21) is 1/2 of the building block standard parts (20);
the building block standard part (20) adopts a quadrangular prism shape, a rubber outer box (201) and a rubber inner box (202) are mutually nested to form a whole, rubble clay (207) is filled in the rubber inner box (202), the rubber outer box (201) covers the rubber inner box (202), the rubber inner box (202) is pressed into the rubber outer box (201), rubber adhesive is coated on the outer surface of the side surface of the rubber inner box (202), a concave key groove (203) is arranged on the upper bottom surface of the rubber outer box (201), the size of the key groove (203) is completely the same as the shape and size of a key tooth (204) on the lower bottom surface of the rubber inner box (202), the key groove (203) and the key tooth (204) are mutually nested, the cross sections of the key groove (203) and the key tooth (204) are circular, the upper bottom surface and the lower bottom surface of the building block standard part (20) are respectively symmetrically and uniformly arranged, a sliding groove (206) is symmetrically arranged on the side surface of the key groove (203), and the depth extends to the bottom of the key groove (203), the bottom of the key groove (203) is provided with a clamping groove (205), the clamping groove (205) is annular, and the inner radius of the clamping groove is consistent with the radius of the key groove (203).
3. The fabricated dam of claim 2, wherein: broken stone clay (207) in the building block standard parts (20) and 1/2 and the building block standard parts (21) are mixed by broken stones and clay according to the mass ratio of 1.5: 1-1: 1, and water is sprayed to vibrate and compact.
4. The fabricated dam of claim 2, wherein: the rubber outer box (201) and the rubber inner box (202) of the building block standard piece (20) and the 1/2 building block standard piece (21) are made of high-strength rubber with the thickness of 0.5-1 cm.
5. The fabricated dam 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 portal 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.
6. The fabricated dam 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.
7. The fabricated dam core wall of claim 1, wherein: the upper and lower sides of the bottom plain concrete cushion layer (1) are respectively provided with tooth walls with the depth of 1-2 meters.
8. A construction method of an assembled dam core wall structure is characterized in that: the method comprises the following steps:
s1, clearing the foundation, removing the riverbed alluvial layer to a designed elevation, and removing the slope lamination layers on the two sides of the dam axis;
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) on the constructed concrete cushion (1) and forming a door opening-shaped section;
s5, building the rubber clay block core wall (2) layer by layer, wherein each layer is 2-4 m, after building each layer of blocks, 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 dam crest;
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;
and S7, after the dam body is constructed to the designed elevation, pouring a concrete protective layer (6) on the top of the dam and the L-shaped wave wall (7), wherein the bottom surface of the L-shaped wave wall (7) is poured on the top of the rubber clay block core wall (2).
9. The construction method of a core wall structure of a fabricated dam as claimed in claim 8, wherein: before S1, the method further includes the following steps:
pouring block standard (20) and 1/2 block standard (21): firstly filling broken stone clay (207) in a rubber inner box (202), vibrating and compacting, then covering a 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, and 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), so as to ensure that the rubber outer shell (201) and the rubber inner shell (202) are tightly adhered to form a complete whole.
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