CN-224213227-U - Geomembrane sedimentation self-adaptive device based on pressure balance

CN224213227UCN 224213227 UCN224213227 UCN 224213227UCN-224213227-U

Abstract

The utility model discloses a geomembrane sedimentation self-adaption device based on pressure balance, which comprises at least one sedimentation self-adaption unit, wherein the sedimentation self-adaption unit comprises a medium bag and an injection and connection seat, the medium bag is made of elastic and high-pressure resistant materials, a cavity for containing high-pressure medium is arranged in the cavity, the device is arranged below a geomembrane, a part of the junction between a bedrock area and a backfill area is positioned above the bedrock area, the other part of the junction is positioned above the backfill area, when the backfill area is settled, the medium bag positioned at the backfill area is expanded, the medium bag positioned at the bedrock area is compressed, and huge shear stress on the geomembrane is counteracted or partially counteracted by the hard bedrock area, so that the geomembrane cannot be torn to cause the leakage problem of soft and hard interfaces.

Inventors

Tang Yunuo
LING HAO
CEN WEIJUN
JI YI
YAN GUOXIN
HE XINLU
LU XIAOYI

Assignees

河海大学

Dates

Publication Date: 20260508
Application Date: 20250509

Claims (4)

1. The geomembrane sedimentation self-adaptive device based on pressure balance is characterized by being arranged below a geomembrane (1), wherein a base rock area (3) and a backfill area (4) are arranged at the junction, one part of the geomembrane sedimentation self-adaptive device is arranged above the base rock area (3), the other part of the geomembrane sedimentation self-adaptive device is arranged above the backfill area (4), and the geomembrane sedimentation self-adaptive device comprises at least one sedimentation self-adaptive unit (2), wherein the sedimentation self-adaptive unit (2) comprises a medium bag and an injection and connection seat (24); The medium bag is made of elastic and high-pressure-resistant materials and is internally provided with a chamber for accommodating high-pressure medium; And the injection and connection seat (24) is used for injecting high-pressure medium into the medium bag, and is matched with a high-pressure-resistant connecting pipe to connect each sedimentation self-adaptive unit (2) in series when two or more sedimentation self-adaptive units (2) exist.
2. Geomembrane sedimentation adaptation device based on pressure equalization according to claim 1, characterized in that the medium bags of the sedimentation adaptation unit (2) comprise a first medium bag (21) and a second medium bag (22), the sedimentation adaptation unit (2) further comprising a communication pipe (23); The first medium bag (21) and the second medium bag (22) are identical in structure, the cross section of the first medium bag is elliptical or rectangular, and the first medium bag (21) and the second medium bag (22) are axially arranged side by side; The plurality of communicating pipes (23) are arranged, the plurality of communicating pipes (23) are fixedly connected between the first medium bag (21) and the second medium bag (22) at equal intervals along the axial direction of the first medium bag (21) and the second medium bag (22), and the chambers of the first medium bag (21) and the second medium bag (22) are mutually communicated through inner pipelines of the plurality of communicating pipes (23); The injection and connecting seat (24) is respectively and fixedly connected with the two axial end surfaces of the first medium bag (21) and the second medium bag (22); When the self-adaptive settlement unit is paved, the central axial line of the self-adaptive settlement unit (2) coincides with the boundary line between the backfill area (4) and the bedrock area (3), the first medium bag (21) is positioned above the backfill area (4), and the second medium bag (22) is positioned above the bedrock area (3).
3. Geomembrane sedimentation adaptation device based on pressure equalization according to claim 1, characterized in that the media bladder of the sedimentation adaptation unit (2) is an integral media bladder (25); The integrated medium bag (25) is a cuboid, the cavity is an integral cavity, and two axial end surfaces of the integral medium bag are fixedly connected with an injection and connection seat (24) respectively; when the integrated medium bag is paved, the axial line of the integrated medium bag (25) coincides with the boundary line between the backfill area (4) and the bedrock area (3), one half of the bottom surface of the integrated medium bag (25) is positioned above the backfill area (4), and the other half of the bottom surface of the integrated medium bag (25) is positioned above the bedrock area (3).
4. A pressure balance based geomembrane settling adaptive device as claimed in any one of claims 1 to 3, wherein the high pressure medium is any one of high pressure nitrogen, mineral oil or synthetic hydraulic oil.

Description

Geomembrane sedimentation self-adaptive device based on pressure balance Technical Field The utility model relates to the technical field of hydraulic engineering, in particular to a geomembrane sedimentation self-adaptive device. Background The geomembrane is an emerging engineering seepage-proofing material made of high molecular polymer, has the characteristics of light weight, softness, convenient construction, excellent seepage-proofing performance, low cost, strong ductility and the like, and is widely applied to seepage-proofing engineering of reservoir dams. With the improvement of the geomembrane material and the maturation of the welding line welding process, the construction quality of laying the geomembrane in a large area is ensured, and the rigid connection of the geomembrane becomes a key and easily neglected weak link of anti-seepage treatment. The leakage problem of the soft and hard interfaces of reservoirs of the pumped storage power stations put into production in recent years in China is serious, the normal operation of the power station units is affected, and huge economic losses are caused. The geomembrane tension caused by settlement of the foundation in the backfill area is difficult to weaken, so that the geomembrane is broken under huge tension, especially at the junction of the backfill area and the bedrock area, the texture of the bedrock area is hard, the compaction degree of the backfill area is lower than that of the in-situ bedrock area although the backfill area is compacted by rolling, the foundation in the backfill area is easy to settle, the geomembrane is unevenly deformed caused by uneven settlement of the foundation, the geomembrane is subjected to huge shear stress, and fig. 1 is a schematic diagram of the geomembrane used in the existing reservoir, therefore, the junction of the backfill area and the bedrock area is a heavy disaster area for destroying the geomembrane, the geomembrane is laid into a hidden engineering, and the geomembrane is usually in long-term service and is difficult to perform timely and effective intervention after settlement. Therefore, there is a need to address the problem of geomembrane tearing due to sedimentation changes. Disclosure of utility model In order to solve the technical problems, the utility model provides a geomembrane sedimentation self-adaptive device based on pressure balance, which has the following technical scheme: The pressure balance-based geomembrane sedimentation self-adaption device is arranged below a geomembrane, a part of the geomembrane sedimentation self-adaption device is located above the junction of a bedrock area and a backfill area, and the other part of the geomembrane sedimentation self-adaption device is located above the bedrock area and comprises at least one sedimentation self-adaption unit, and the sedimentation self-adaption unit comprises a medium bag, an injection seat and a connecting seat. The medium bag is made of elastic and high-pressure resistant materials and is internally provided with a chamber for containing high-pressure medium. And the injection and connection seat is used for injecting high-pressure medium into the medium bag, and when two or more than two sedimentation self-adaptive units exist, the sedimentation self-adaptive units are connected in series by matching with the high-pressure resistant connection pipe. Further, the medium bag of the sedimentation self-adaptive unit comprises a first medium bag and a second medium bag, and the sedimentation self-adaptive unit further comprises a communicating pipe. The first medium bag and the second medium bag are identical in structure, the cross section of the first medium bag is elliptical or rectangular, and the first medium bag and the second medium bag are axially arranged side by side. The communicating pipes are in a plurality, the communicating pipes are fixedly connected between the first medium bag and the second medium bag at uniform intervals along the axial direction of the first medium bag and the second medium bag, and the cavities of the first medium bag and the second medium bag are mutually communicated through inner pipelines of the communicating pipes. The injection and connecting seat is respectively and fixedly connected with two axial end surfaces of the first medium bag and the second medium bag. When the self-adaptive settlement unit is paved, the central axial line of the self-adaptive settlement unit coincides with the boundary line between the backfill area and the bedrock area, the first medium bag is positioned on the backfill area, and the second medium bag is positioned on the bedrock area. The geomembrane settlement self-adaptive device of the communicating vessel structure is suitable for engineering use of which the boundary line between the backfill area and the bedrock area is long or the boundary line between the backfill area and the bedrock area is curved. Further, the medium bags of the sedime