CN213836760U

CN213836760U - Anti-seepage treatment structure for engineering dam foundation

Info

Publication number: CN213836760U
Application number: CN202022498950.5U
Authority: CN
Inventors: 翟福春; 李新广; 班懿根; 韩伟; 张娜
Original assignee: Tarim River Basin Engineering Construction Office Of Xinjiang Uygur Autonomous Region
Current assignee: Tarim River Basin Engineering Construction Office Of Xinjiang Uygur Autonomous Region
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-07-30
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a structure that engineering dam foundation prevention of seepage was handled, engineering dam body and the plain concrete barrier wall that is connected with the engineering dam body, set up the concrete block on the top surface of plain concrete barrier wall, set up the anti-skidding wall above the ladder platform of engineering dam body, backfill the excavation bed of material in engineering dam body and plain concrete barrier wall and with the valley that the concrete block set up before, its upper end and the ladder platform parallel and level of engineering dam body, its lower extreme is crossing with concrete block top surface, barrier film is being laid to the surface equipartition on the excavation bed of material, barrier film's upper end and engineering dam body's geomembrane welding are as an organic whole, barrier film's lower extreme passes through sticky the above of gluing at the concrete block, on the top surface of concrete block through the anchor nail anchor, barrier film's middle part is setting up vertical expansion joint, barrier film upper portion and plain concrete barrier wall upstream side are setting up the powder clay layer of 1.5m thickness. The utility model discloses it is rational in infrastructure, can strengthen geomembrane prevention of seepage effect, improve whole prevention of seepage nature, compensate geomembrane defect seepage problem.

Description

Anti-seepage treatment structure for engineering dam foundation

Technical Field

The utility model relates to a hydraulic engineering construction technical field belongs to the structure that engineering dam foundation prevention of seepage was handled, especially a structure that engineering dam foundation prevention of seepage was handled.

Background

Hydraulic engineering is an engineering built for controlling and allocating surface water and underground water in nature to achieve the purposes of removing harmful substances and benefiting. Also known as water engineering. Water is a valuable resource essential for human production and life, but its naturally occurring state does not completely meet the needs of human beings. Only when hydraulic engineering is built, water flow can be controlled, flood disasters are prevented, and water quantity is adjusted and distributed to meet the requirements of people on water resources in life and production.

A dam is a water retaining structure which intercepts water flow of river channels to raise the water level or adjust the flow. Can form a reservoir, raise the water level, regulate runoff and concentrate water head, and is used for flood control, water supply, irrigation, hydroelectric power generation, shipping improvement and the like. River regulation buildings for adjusting river conditions and protecting bank beds are also called dams, such as spur dams, dam-fill dams, submerged dams and the like, because the construction engineering of dams is huge, local materials are mostly adopted for construction, and water seepage and water leakage caused by dams are a big problem troubling people.

According to the related research results, the defects of the geomembrane are divided into microscopic defects and macroscopic defects, the seepage caused by the microscopic defects is small, and the safety of the earth-rock dam cannot be influenced, and the … … macroscopic defects mainly comprise breakage caused by overlarge local stress deformation such as pulling, bursting, puncturing, liquid expansion damage and the like, breakage caused by construction machinery and incompleteness of connection of the geomembrane caused by welding or gluing quality. … … at the present stage, the geomembrane seepage-proofing project is impossible to completely avoid defects, and scientific prevention and reasonable controllability are the key points. At present, the anti-seepage treatment length of the engineering dam foundation is long, the treatment process is complex, the links are multiple, and no defect is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a structure that engineering dam foundation prevention of seepage was handled, its is rational in infrastructure, can strengthen geomembrane prevention of seepage effect, improves the whole prevention of seepage nature of engineering dam foundation, compensaties geomembrane defect seepage problem.

The purpose of the utility model is realized like this: a seepage-proofing treatment structure for an engineering dam foundation comprises an engineering dam body and a plain concrete seepage-proofing wall connected with the engineering dam body, the top surface of the plain concrete impervious wall is provided with a concrete cap, a antiskid wall is arranged above a step platform of the engineering dam body, backfilling an excavation material layer in the engineering dam body, the plain concrete impervious wall and the valley before the concrete cap, the upper end of the surface of the concrete cap is flush with the stepped platform of the engineering dam body, the lower end of the surface of the concrete cap is intersected with the top surface of the concrete cap, impermeable membranes are uniformly laid on the surface of the excavated material layer, the upper ends of the impermeable membranes are welded with the geomembrane of the engineering dam body into a whole, the lower ends of the impermeable membranes are bonded on the concrete cap through glue and anchored on the top surface of the concrete cap through anchoring nails, the middle part of the impermeable membrane is provided with a longitudinal expansion joint, and the upper part of the impermeable membrane and the upstream side of the plain concrete impermeable wall are provided with a powder clay layer with the thickness of 1.5 m.

The utility model discloses a strengthen new geotechnological membrane of spreading and soil cement cut-off wall, and new and old geomembrane combination department prevention of seepage effect, according to the thought theory of "membrane-soil" joint prevention of seepage, at new geotechnological membrane upper portion of spreading and plain concrete cut-off wall upper reaches side, backfill thickness is the silty clay of 1.5m, form the body of preventing seepage one to reinforcing geomembrane prevention of seepage effect has also compensatied geomembrane defect seepage problem except improving whole impermeable.

The utility model discloses rational in infrastructure, strengthened geomembrane prevention of seepage effect, improved the whole prevention of seepage nature of engineering dam foundation, compensatied geomembrane defect seepage problem.

Drawings

The present invention will be further described with reference to the accompanying drawings, and fig. 1 is a schematic view of the structure of the present invention.

Detailed Description

A structure for seepage-proofing treatment of an engineering dam foundation is shown in figure 1 and comprises an engineering dam body 1 and a plain concrete seepage-proofing wall 2 connected with the engineering dam body 1, wherein a concrete cap 3 is arranged on the top surface of the plain concrete seepage-proofing wall 2, a skid-proofing wall 4 is arranged above a step platform of the engineering dam body 1, an excavation material layer 5 is backfilled in a valley between the engineering dam body 1 and the plain concrete seepage-proofing wall 2 and in front of the concrete cap 3, the upper end of the surface of the excavation material layer is flush with the step platform of the engineering dam body 1, the lower end of the surface of the excavation material layer is intersected with the top surface of the concrete cap 3, seepage-proofing membranes 6 are uniformly laid on the surface of the excavation material layer 5, the upper ends of the seepage-proofing membranes 6 and geomembranes 9 of the engineering dam body 1 are welded into a whole, the lower ends of the seepage-proofing membranes 6 are connected on the concrete cap 3 through glue and anchored on the top surface of the concrete cap 3 through anchoring nails 8, a longitudinal, a powder clay layer 10 with the thickness of 1.5m is arranged on the upper part of the impermeable membrane 6 and the upstream side of the plain concrete impermeable wall 2. The structure of the longitudinal expansion joint 7 of the impermeable membrane is that a longitudinal folding layer is arranged on the impermeable membrane 6, and the width of the longitudinal folding layer is 2-10 cm. The surface gradient of the powdery clay layer 10 is adapted to the surface gradient of the impermeable membrane 6, and the horizontal layer at the upper end of the powdery clay layer 10 is connected with the lower end of the inclined surface of the anti-slip wall 4.

Claims

1. The utility model provides a structure that engineering dam foundation prevention of seepage was handled, includes engineering dam body (1) and plain concrete impervious wall (2) that are connected with engineering dam body (1), is setting up concrete block cap (3) on the top surface of plain concrete impervious wall (2), is setting up above the ladder platform of engineering dam body (1) and is hindering smooth wall (4), characterized by: an excavation material layer (5) is backfilled in a valley between an engineering dam body (1) and a plain concrete impervious wall (2) and in front of a concrete cap (3), the upper end of the surface of the excavation material layer is flush with a step platform of the engineering dam body (1), the lower end of the surface of the excavation material layer is intersected with the top surface of the concrete cap (3), impermeable membranes (6) are uniformly distributed on the surface of the excavation material layer (5), the upper ends of the impermeable membranes (6) are welded with geomembranes (9) of the engineering dam body (1) into a whole, the lower ends of the impermeable membranes (6) are connected to the upper surface of the concrete cap (3) through glue, and are anchored on the top surface of the concrete cap (3) through anchoring nails (8), a longitudinal expansion joint (7) is arranged in the middle of the impermeable membranes (6), and a silty clay layer (10) with the thickness of 1.5m is arranged on the upper part of the impermeable membranes (6) and the upstream side of the plain impermeable.

2. The engineered dam foundation impermeable treatment structure as claimed in claim 1, wherein: the structure of the longitudinal expansion joint (7) of the impermeable membrane is that a longitudinal folding layer is arranged on the impermeable membrane (6), and the width of the longitudinal folding layer is 2-10 cm.

3. The engineered dam foundation impermeable treatment structure as claimed in claim 1, wherein: the surface gradient of the powdery clay layer (10) is adapted to the surface gradient of the impermeable membrane (6), and the horizontal layer at the upper end of the powdery clay layer (10) is connected with the lower end of the inclined surface of the anti-slip wall (4).