CN218204509U - Cut and ooze wall low reaches water level intercommunication structure - Google Patents

Abstract

The utility model discloses a cut and ooze wall upper and lower reaches water level intercommunication structure, relates to the hydraulic engineering field, and the present application includes the foundation ditch, the pouring cuts and oozes the wall in the foundation ditch, the foundation ditch upstream face and bottom set up the anti-filter portion, the inside landfill of foundation ditch permeates water the filling portion, uses the soil body that has the water permeability to communicate the upper and lower reaches water level, has reduced the difference in height of the soil body water level of the upstream side and the top elevation of cutting and oozing the wall, has increased the stability of soil body and water level change; the communicating structure can effectively prevent soil from floating, and the arrangement of the reverse filtering part can further improve the resistance of the soil to osmotic damage and prevent the loss of fine particles of the soil; this application both can select only to bury the filling portion that permeates water and fully ensure water level intercommunication and stable, also can select the mode of arranging that the filling portion and the soil material backfill portion that permeates water set up in proper order interval for use according to operating condition, when basically guaranteeing that the water level intercommunication is stable, reduced construction cost.

Description

Cut and ooze wall low reaches water level connectivity structure

Technical Field

The application relates to the field of hydraulic engineering, in particular to a seepage intercepting wall upper and lower reaches water level communicating structure.

Background

Seepage in the body and the foundation of the earth and rockfill dam causes loss of soil particles due to physical or chemical action, and local damage occurs to soil, which is called seepage deformation.

The seepage interception wall is an anti-seepage structure on the basis of a water retaining building, ensures the stable seepage of a foundation, is generally formed by pouring concrete, is positioned on the foundation with small water permeability, extends into a clay anti-seepage body, can control the seepage flow, prolongs the seepage diameter and has good anti-seepage effect; the other biggest advantage of the seepage interception wall is that the side slope of the excavated soil can be stabilized, and the collapse and the landslide can be prevented. In order to guarantee the engineering quality of the dam and improve the performance of the dam, the dam reinforcement work is made to be vital, but in the actual use process of the existing seepage interception wall, because the top position of the seepage interception wall is lower than the ground, and the foundation pit is backfilled with the original soil, the situation that the water level of the soil body on the water facing side is higher than the top elevation of the seepage interception wall still exists, the water level of the soil body on the upstream and downstream is unstable, water level deviation is generated, the previous method influences the soil body structure, and the soil body floats or runs off, so that engineering accidents are caused.

Disclosure of Invention

In order to solve the technical problem, the application provides a cut ooze wall upper and lower reaches water level connectivity structure, and this application connectivity structure can effectual balance upstream and downstream water head, increases water level stability, prevents that the soil body warp and runs off.

The technical problem of the application is realized by the following technical scheme: the utility model provides a cut infiltration wall low reaches water level connectivity structure, includes the foundation ditch, the pouring cuts the infiltration wall in the foundation ditch, the foundation ditch upstream face and bottom set up the anti-filter part, the inside landfill of foundation ditch is permeated water the filling portion.

By adopting the technical scheme, the traditional method of backfilling the foundation pit by using the original soil material is abandoned, the permeable filling part is buried in the foundation pit, and the soil body with water permeability is used for communicating the water levels of the upstream and the downstream, so that the height difference between the water level of the soil body on the water facing side and the top elevation of the seepage intercepting wall is reduced, and the stability of the soil body and the water level change is improved.

Furthermore, the inside soil material backfill portion that still includes of foundation ditch, the portion of filling that permeates water and the soil material backfill portion set up along the pouring direction of intercepting the infiltration wall at interval in proper order.

Further, the reverse filtering part comprises a first reverse filtering layer, a second reverse filtering layer and a third reverse filtering layer which are sequentially arranged along the seepage direction, wherein the first reverse filtering layer, the second reverse filtering layer and the third reverse filtering layer are all sand materials, and the average grain diameter is sequentially increased.

Furthermore, the particle size range of the first reverse filtering layer sandstone is 0.25 mm-1 mm; the particle size range of the second inverted filter layer sandstone is 1 mm-5 mm; the particle size range of the third reverse filter layer sandstone is 5 mm-20 mm.

Further, the reverse filtering part comprises a medium coarse sand cushion layer, a geotextile and a broken stone cushion layer which are sequentially arranged along the seepage direction; the particle size of the medium coarse sand cushion layer is smaller than that of the gravel cushion layer.

Further, the thickness of the medium coarse sand cushion layer and the thickness of the gravel cushion layer are both 200mm.

Furthermore, the particle size range of the gravel cushion is 5-20 mm.

In summary, the present application has the following beneficial effects:

1. this application uses the soil body intercommunication low reaches water level that has the water permeability at the inside landfill fill section of foundation ditch, has reduced the difference in height of soil body water level and the wall top elevation that intercepts water of the side of meeting water, has increased the stability of soil body and water level change.

2. The utility model provides a communicating structure can effectually prevent that the soil body from floating, and the setting of anti-filter portion can further improve the soil body and resist the infiltration and destroy, prevents that the soil body fine particle from running off, and anti-filter portion provides two kinds of different structure anti-filter layer combinations, can choose for use wantonly under the prerequisite that satisfies cost and quality demand.

3. In this application connectivity structure's the foundation ditch, both can select only to bury the filling portion that permeates water fully to ensure water level intercommunication and stable, also can select the mode of arranging that the filling portion and the soil material backfill portion that permeates water set up at interval in proper order for use according to operating condition, when basically ensuring that water level intercommunication is stable, reduced construction cost.

Drawings

FIG. 1 is a schematic cross-sectional view of a communication structure of the present application;

FIG. 2 is a schematic cross-sectional view of the communication structure of the present application in an unfilled state;

FIG. 3 is a schematic perspective view of the present application;

FIG. 4 is a schematic structural diagram of an embodiment of an anti-filtration layer of the present application;

FIG. 5 is a schematic structural diagram of an inverted filter layer according to another embodiment of the present application.

Description of reference numerals:

1. a foundation pit; 2. a seepage interception wall; 3. a reverse filtering part; 301. a first inverted filter layer; 302. a second inverted filter layer; 303. a third inverted filter layer; 304. a medium coarse sand cushion layer; 305. geotextile; 306. a gravel cushion layer; 4. a water-permeable filling section; 5. A soil material backfilling part.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

As shown in figure 1, the structure for communicating the water level of the upper and lower reaches of the interception wall comprises a foundation pit 1, an interception wall 2 is poured in the foundation pit 1, a reverse filtering part 3 is arranged at the upstream surface and the bottom of the foundation pit 1, and a water-permeable filling part 4 is buried in the foundation pit 1.

The reverse filtering part 3 should satisfy the following conditions: the water permeability is larger than that of the protected soil body, and the seepage water can be smoothly discharged; the protected soil body does not generate seepage deformation; the fine soil cannot be blocked and lose efficacy; under the condition that the seepage-proofing body has cracks, soil particles cannot be brought out of the inverted filter layer, and the cracks can heal automatically.

The permeable filling part 4 is made of high-permeability materials such as mixed permeable stone materials or polymer permeable materials, the water permeable filling part 4 mainly aims to enable water flow to smoothly and stably permeate from the upstream to the downstream, the water level in the permeable filling part 4 cannot be higher than the top elevation of the permeable wall when the soil body on the upstream side is higher than the top elevation of the permeable wall, the water level is stably transited to approach the top elevation of the permeable wall 2, the permeable filling part 4 is used for filling a foundation pit in a physical space, and the construction attractiveness is further improved.

When upstream water flow permeates to the seepage interception wall 2, soil body fine particles cannot be washed and brought into the foundation pit 1 due to the protection effect of the reverse filtering part 3, and because the permeable filling part 4 is buried in the foundation pit 1, the water flow has different permeation effects on two sides of the reverse filtering part 3, so that the water level of the top elevation of the seepage interception wall 2 and the water level of the soil body on the water-facing side of the reverse filtering part 3 tend to be balanced, and the situations that the water flow permeates and the water level in the foundation pit are higher than the top elevation of the seepage interception wall 2 due to the backfilling of the original soil body are prevented.

As shown in fig. 2, in an embodiment, a seepage intercepting wall and downstream water level communicating structure comprises a foundation pit 1, a seepage intercepting wall 2 is poured in the foundation pit 1, a reverse filtering part 3 is arranged at the upstream face and the bottom of the foundation pit 1, no filling material can be adopted in the foundation pit 1, namely, the foundation pit is not backfilled with original soil, and is not filled with permeable material, and is directly exposed to the external environment.

As shown in fig. 3, in one embodiment, the structure for communicating the water level on the upstream and the downstream of the infiltration intercepting wall comprises a foundation pit 1, the infiltration intercepting wall 2 is cast in the foundation pit 1, the water-facing surface and the bottom of the foundation pit 1 are provided with a reverse filter part 3, and a permeable filling part 4 is buried in the foundation pit 1; 1 inside still includes the soil material back filling portion 5 of foundation ditch, the filling portion 4 and the soil material back filling portion 5 that permeates water set up along the pouring direction of intercepting infiltration wall 2 at interval in proper order to adopt width 1: 1. in actual construction, the configuration of different width ratios is selected according to factors such as the field soil permeability and the like, so that the cross filling structure can play the maximum effect, the water permeable filling part 4 plays a role in stabilizing the water level, the soil material backfilling part 5 only plays a role in physical filling, the water permeable filling part 4 and the soil material backfilling part 5 fill the foundation pit 1 together, the attractiveness of construction engineering is guaranteed, the damage of water conservancy construction to the soil morphology is reduced, and the structure can basically ensure the stable water level communication, and meanwhile, the soil material backfilling part 5 selects sandy soil in the original foundation pit 1, so that the construction cost is reduced compared with the case of completely using the water permeable filling part 4.

As shown in fig. 4, in one embodiment, the upstream surface and the bottom of the foundation pit 1 are provided with inverse filtering parts 3, the foundation pit 1 is internally filled with a permeable filling part 4, the inverse filtering layer generally comprises 2-3 layers of sand and stones with different grain diameters, the sand and stones are made of durable and weather-resistant materials, the layers are arranged approximately orthogonal to the direction of the fluid, and the grain diameter along the direction of the seepage flow is changed from small to large; in this application the anti-filter portion 3 includes first anti-filter 301, second anti-filter 302 and the third anti-filter 303 that sets gradually along the seepage flow direction, first anti-filter 301, second anti-filter 302 and third anti-filter 303 are the grit material and average particle size increases in proper order.

As shown in fig. 4, in an embodiment, different from the above technical solution, specifically, the sand particle size of the first inverted filter layer 301 ranges from 0.25mm to 1mm; the particle size range of the second inverted filter layer 302 sand is 1-5 mm; the particle size range of the sandstone of the third reverse filtering layer 303 is 5 mm-20 mm. The three-layer design can play a role in filtering fine particles, and can also realize efficient smooth flow guiding and water level stabilization.

As shown in fig. 5, in one embodiment, the foundation pit 1 is provided with a reverse filter part 3 at the upstream and bottom, the foundation pit 1 is internally filled with a permeable filling part 4, and the reverse filter part 3 comprises a medium-coarse sand cushion 304, a geotextile 305 and a gravel cushion 306 which are sequentially arranged along the seepage direction; the particle size of the medium coarse sand cushion layer 304 is smaller than that of the gravel cushion layer 306.

The geotechnical cloth has the advantages of simple construction, high speed, low cost and the like, is clamped between the two sandstone layers, and has good soil conservation, water permeability and anti-blocking performance.

In one embodiment, different from the above technical solutions, specifically, the thicknesses of the medium-coarse sand cushion layer 304 and the gravel cushion layer 306 are both 200mm; the thickness design of the medium-coarse sand cushion layer 304 and the gravel cushion layer 306 can effectively play a role in reverse filtration on the technology of the minimum material cost, the particle size range of the gravel cushion layer 306 is 5-20 mm, the particle size range of the gravel cushion layer is basically the same as that of the gravel of the third reverse filtration layer 303, and the gravel with larger particle size is used as the outermost layer of the reverse filtration layer, so that the fine particles of the soil body can be effectively prevented from being washed away and being taken away, and the structure of the soil body can be prevented from being influenced.

The above description is merely exemplary of the present application and is provided to enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The utility model provides a cut and ooze wall low reaches water level intercommunication structure, includes foundation ditch (1), pouring cut and ooze wall (2) in foundation ditch (1), its characterized in that: the upstream surface and the bottom of the foundation pit (1) are provided with inverse filtering parts (3), and a permeable filling part (4) is buried in the foundation pit (1); the foundation pit is characterized in that a soil material backfilling portion (5) is further arranged inside the foundation pit (1), and the water permeable filling portion (4) and the soil material backfilling portion (5) are sequentially arranged at intervals along the pouring direction of the seepage intercepting wall (2).

2. The structure of claim 1 for communicating water level between the upstream and downstream of a percolation wall, wherein: the reverse filtering part (3) comprises a first reverse filtering layer (301), a second reverse filtering layer (302) and a third reverse filtering layer (303) which are sequentially arranged along the seepage direction, wherein the first reverse filtering layer (301), the second reverse filtering layer (302) and the third reverse filtering layer (303) are all sand materials, and the average particle size is sequentially increased.

3. The communication structure of water level on the downstream of the interception wall of claim 2, wherein: the particle size range of the sand of the first inverted filter layer (301) is 0.25 mm-1 mm; the particle size range of the sandstone of the second inverted filter layer (302) is 1 mm-5 mm; the particle size range of the sand of the third inverted filter layer (303) is 5 mm-20 mm.

4. The communication structure of water level on the downstream of the interception wall of claim 1, wherein: the reverse filtering part (3) comprises a medium-coarse sand cushion layer (304), a geotextile (305) and a gravel cushion layer (306) which are sequentially arranged along the seepage direction; the particle size of the medium and coarse sand cushion layer (304) is smaller than that of the broken stone cushion layer (306).

5. The communication structure of water level on the downstream of the interception wall of claim 4, wherein: the thickness of the medium coarse sand cushion layer (304) and the thickness of the broken stone cushion layer (306) are both 200mm.

6. The communication structure of water level on the downstream of the interception wall of claim 5, wherein: the particle size range of the gravel cushion layer (306) is 5-20 mm.

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