CN212336086U

CN212336086U - Buttress barricade of horizontal drainage

Info

Publication number: CN212336086U
Application number: CN202020647200.7U
Authority: CN
Inventors: 邓波
Original assignee: Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Current assignee: Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-01-12
Anticipated expiration: 2030-04-24

Abstract

The utility model discloses a buttress barricade of horizontal drainage, including the barricade body, the below of barricade body is provided with the barricade bottom plate, a plurality of drain pipes are pre-buried in the barricade body from top to bottom at intervals, the both ends of drain pipe run through the inboard and the outside of barricade body respectively; vertical drainage blanket has been laid to the inboard of barricade body, first backfill layer, horizontal drainage blanket and second backfill layer have been laid by supreme down in proper order on the barricade bottom plate. The utility model relates to a have horizontal drainage blanket and vertical drainage blanket, adopt horizontal drainage blanket as horizontal drainage channel, the method of the vertical drainage blanket of the back of the wall and the wall heel backfill of intercommunication wall, with the drain pipe of the water thrust effective conduction to the back of the wall, the release water pressure increases the wall body steadiness, vertical drainage blanket can also in time discharge the perpendicular water that infiltrates, avoids gathering and forms additional water pressure at the back of the wall.

Description

Buttress barricade of horizontal drainage

Technical Field

The utility model belongs to the technical field of drainage barricade, concretely relates to buttress barricade of horizontal drainage.

Background

The traditional mode of backfilling the back of the buttress retaining wall generally adopts a cantilever to backfill the whole excavated section with the same soil material, wherein the soil filled above a wall bottom plate mainly generates vertical load, the whole weight of the wall is increased, the horizontal anti-sliding stability is not influenced, the horizontal thrust generated on the wall influences the horizontal anti-sliding stability of the wall mainly by the horizontal soil pressure of the backfilled soil at the back of the wall heel, and if the higher soil retaining height is met, the backfilling with a larger internal friction angle and good drainage performance, such as medium coarse sand, gravel sand and other granular materials, is adopted for the backfilled soil of the part. Compared with common soil materials, the loose particles such as sand and stone have smaller horizontal thrust, faster drainage and better guarantee of filling compactness, and the defect is that the unit price of the sand and stone is more expensive.

The traditional counterfort retaining wall drainage method is single, mainly comprises the steps of making a drainage hole and performing reverse filtration on a cantilever to release the water pressure of the wall back of the cantilever, and the method is simple in structure, but for a high counterfort retaining wall, the water pressure of the wall back needs to be released more quickly, and the smooth drainage of the wall back soil body needs to be ensured so as to adapt to various different water level working conditions, particularly for the retaining wall in the water conservancy industry, the frequently encountered working conditions are that the water level of the wall body on the side close to water suddenly drops or even the side close to water in a short time is anhydrous, and the water pressure of the wall back cannot be released in time, so that the poor anti-sliding stability or even the.

For the counterfort retaining wall, the backfill above the wall body bottom plate is blocked between the wall back drain hole and the wall back thrust body, so that the horizontal water thrust which is not beneficial to stabilization can not be effectively released from the wall back drain hole, and if the section of the wall back is completely backfilled with coarse grains such as gravels, the construction cost is overhigh and the economical efficiency is poor. In addition, the traditional retaining wall drainage system mostly adopts a mode of horizontally arranging multiple layers of filter screens, the biggest defect of the mode is that the filter screens are easy to block, if the soil filling quality cannot be guaranteed, the horizontal thrust cannot be effectively reduced, and the risk is greater when the method is applied to a high and large retaining wall.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a buttress barricade of horizontal drainage in order to solve the deficiencies of the background art.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a buttress barricade of horizontal drainage, includes the barricade body, the below of barricade body is provided with barricade bottom plate, its characterized in that: a plurality of drain pipes are pre-embedded in the retaining wall body at intervals from top to bottom, and two ends of each drain pipe respectively penetrate through the inner side and the outer side of the retaining wall body;

vertical drainage blanket has been laid to the inboard of barricade body, first backfill layer, horizontal drainage blanket and second backfill layer have been laid by supreme down in proper order on the barricade bottom plate.

In the above technical scheme, the drain pipe is obliquely arranged in the retaining wall body, and one end of the drain pipe facing the inner side is higher than one end facing the outer side.

In the technical scheme, the pipe orifice of one end of the drain pipe facing the inner side is provided with the reverse filter bag.

In the technical scheme, the reverse filter bag is prepared by wrapping crushed stones with non-woven fabrics.

Among the above-mentioned technical scheme, vertical drainage blanket adopts the grit material to lay and forms, vertical drainage blanket forms the intercommunication passageway of all drain pipes in vertical.

In the technical scheme, the horizontal drainage layer is formed by paving sand and stone materials, and the horizontal drainage layer forms a drainage channel in the horizontal direction.

In the technical scheme, the first backfill layer and the second backfill layer are formed by filling soil, and the filling height of the first backfill layer is 1/3-1/2 of the height of the retaining wall body.

In the technical scheme, the back sides of the first backfill layer, the horizontal drainage layer and the second backfill layer are provided with a third backfill layer, and the third backfill layer is formed by filling coarse sand.

In the technical scheme, a clay layer is filled between the bottom surface of the third backfill layer and the side surface of the retaining wall bottom plate.

In the above technical scheme, a plurality of cast-in-place piles are arranged below the retaining wall bottom plate.

Compared with the prior art, the beneficial effects of the utility model are that:

one of which, the utility model relates to a have horizontal drainage blanket and vertical drainage blanket, adopt horizontal drainage blanket as horizontal drainage channel, the method of the vertical drainage blanket of the back of the wall and the wall heel backfill of intercommunication wall, with the effective conduction of water thrust to the drain pipe of the back of the wall, release water pressure increases the wall body steadiness, vertical drainage blanket can also in time discharge the perpendicular water that infiltrates, avoids gathering and forms additional water pressure at the back of the wall.

Secondly, the retaining wall drainage of the utility model can ensure that the water level difference inside and outside the wall can reach balance in the shortest time under the condition of any water level change, when the water level outside the wall suddenly drops, the water pressure generating horizontal thrust inside the wall can be quickly released through the horizontal drainage layer, the unbalanced water pressure is reduced, when the water level outside the wall suddenly increases, the water pressure reversely enters the horizontal sand layer through the drainage pipe and then enters the wall heel gravel backfill, and the water pressure is balanced again;

thirdly, the utility model discloses a below of barricade bottom plate is provided with a plurality of bored concrete piles, and the pile foundation undertakes whole level and vertical load, and for the operating mode that becomes silted up earth to the soil property of foundation, the horizontal bearing capacity of single pile is lower, under the prerequisite that does not obviously increase pile foundation treatment work volume, horizontal soil thrust and water pressure can be reduced to design horizontal drainage blanket and vertical drainage blanket structure, have guaranteed the stability under the extreme operating mode.

Fourth, the utility model discloses a buttress barricade compares other big buttress barricades, except that thrust body third backfill layer adopts the grit material, other positions adopt ordinary soil aggregate, can not increase engineering cost, can reduce the cost, and the economic nature is showing.

Drawings

FIG. 1 is a schematic structural view of the horizontal drainage buttress retaining wall of the present invention;

in the figure: 1-retaining wall body, 1.1-inner side, 1.2-outer side, 2-retaining wall bottom plate, 3-drain pipe, 4-drainage layer, 5-first backfill layer, 6-horizontal drainage layer, 7-second backfill layer, 8-reverse filter bag, 9-third backfill layer, 10-clay layer and 11-filling pile.

Detailed Description

The invention will be further described in detail with reference to the drawings and the following detailed description, which are provided for the purpose of clearly understanding the invention and are not intended to limit the invention.

As shown in fig. 1, the horizontal drainage buttress of the present invention comprises a retaining wall body 1, a retaining wall bottom plate 2 is arranged below the retaining wall body 1, a plurality of drainage pipes 3 are pre-embedded in the retaining wall body 1 from top to bottom at intervals, and two ends of the drainage pipes 3 respectively penetrate through the inner side 1.1 and the outer side 1.2 of the retaining wall body 1; vertical drainage blanket 4 has been laid to inboard 1.1 of barricade body 1, first backfill layer 5, horizontal drainage blanket 6 and second backfill layer 7 have been laid in proper order by supreme down on the barricade bottom plate 2. The utility model relates to a have horizontal drainage blanket and vertical drainage blanket, adopt horizontal drainage blanket as horizontal drainage channel, the method of the vertical drainage blanket of the back of the wall and the wall heel backfill of intercommunication wall, with the drain pipe of the effective conduction of water thrust to the back of the wall, the release water pressure increases the wall body steadiness, vertical drainage blanket still

In this embodiment, the drainage pipe 3 is obliquely arranged in the retaining wall body 1, and one end of the drainage pipe 3 facing the inner side 1.1 is higher than one end facing the outer side 1.2. The pipe orifice of the end of the drain pipe 3 facing the inner side 1.1 is provided with a reverse filter bag 8. The reverse filter bag 8 is prepared by wrapping gravel with non-woven fabrics. Vertical drainage blanket 4 adopts the grit material to lay and forms, vertical drainage blanket 4 forms all drain pipe 3's intercommunication passageway in vertical. The horizontal drainage layer 6 is formed by paving sand and stone materials, and the horizontal drainage layer 6 forms a drainage channel in the horizontal direction. The first backfill layer 5 and the second backfill layer 7 are formed by filling soil, and the filling height of the first backfill layer 5 is 1/3-1/2 of the height of the retaining wall body 1. The dorsal part of first backfill layer 5, horizontal drainage blanket 6 and second backfill layer 7 is provided with third backfill layer 9, third backfill layer 9 adopts coarse sand to fill to form, it has clay layer 10 to fill between the bottom surface of third backfill layer 9 and the side of barricade bottom plate 2, the below of barricade bottom plate 2 is provided with a plurality of bored concrete piles 11.

The construction method of the horizontal drainage buttress retaining wall comprises the following steps:

1) the retaining wall body 1 is formed by pouring concrete, a drain pipe 3 is reserved in the retaining wall body 1, a PVC pipe with the diameter of 5cm is generally adopted, a reverse filter bag 8 is arranged at a pipe orifice at one end of the inner side (namely the soil facing side of the wall back) of the drain pipe 3, the reverse filter bag 8 is used for packing broken stones by adopting acupuncture non-woven fabrics to plug the pipe orifice for reverse filtering, and the diameter of the reverse filter bag is about 30 cm;

2) a vertical drainage layer 4 is laid on the inner side 1.1 of the retaining wall body 1, a layer of 60 cm-thick sand-stone material which is distributed vertically is designed to be attached to the inner side of the concrete wall back, and the sand-stone material layer is vertically communicated with all the drainage pipes;

3) a first backfill layer 5, a horizontal drainage layer 6 and a second backfill layer 7 are sequentially laid on the retaining wall bottom plate 2 from bottom to top, common soil is still backfilled in the first backfill layer 5 and the second backfill layer 7, the volume of the soil at the part is the largest, and if sand and stone are used completely, the construction cost is too high and uneconomical, a 150 cm-thick horizontal drainage sand layer is reserved at the high position of the wall to be filled from 1/2 to 1/3, the height is the height of a horizontal force resultant force action point, and the horizontal drainage layer is designed at the height, so that the effect is obvious; the sand layer is communicated with the vertical drainage layer on the wall back and also communicated with backfill sand and stone materials which generate main horizontal thrust on the back of the wall heel, and water pressure in the active soil thrust is effectively transmitted to a drainage pipe;

4) and the third backfill layer 9 is backfilled behind the wall heel, and the backfilling of the wall heel adopts sand and stone materials which rise along with the backfilling elevation, so that the sand and stone materials at the part are communicated with the reserved horizontal drainage layer.

Because the retaining wall that water conservancy trade used, the wall is outer to face the water side water level amplitude of fluctuation greatly, change frequently, the retaining wall horizontal thrust is complicated and changeable, lead to the frequent occurrence of retaining wall unstability phenomenon, the utility model relates to a retaining wall drainage can guarantee under any water level change condition that the water head in the wall and outside the wall reaches the balance in the shortest time, when the water head suddenly falls outside the wall, the water pressure that produces the horizontal thrust inside the wall can be released through the horizontal drainage bed very fast, reduce unbalanced water pressure, when the water head suddenly increases outside the wall, water pressure enters the horizontal sand bed through the drain pipe and then enters the wall and follows the grit backfill, water pressure is balanced again; compared with other high and large buttress retaining walls, the thrust body is backfilled by sand and stone materials, and other parts do not obviously increase the construction cost, so the economic efficiency of the invention is obvious.

While the present invention has been described with reference to the preferred embodiments, it should be understood that the detailed description and drawings are not intended to limit the invention to the particular embodiments disclosed, but rather, the invention is to cover all modifications and equivalents falling within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides a buttress barricade of horizontal drainage, includes barricade body (1), the below of barricade body (1) is provided with barricade bottom plate (2), its characterized in that: a plurality of drain pipes (3) are embedded in the retaining wall body (1) at intervals from top to bottom, and two ends of each drain pipe (3) penetrate through the inner side (1.1) and the outer side (1.2) of the retaining wall body (1) respectively;

vertical drainage blanket (4) have been laid to inboard (1.1) of barricade body (1), first backfill layer (5), horizontal drainage blanket (6) and second backfill layer (7) have been laid by supreme down on barricade bottom plate (2) in proper order.

2. The horizontally drained buttress wall of claim 1, wherein: the drain pipe (3) is obliquely arranged in the retaining wall body (1), and one end, facing the inner side (1.1), of the drain pipe (3) is higher than one end, facing the outer side (1.2), of the drain pipe.

3. The horizontally drained buttress wall of claim 2, wherein: the pipe orifice of one end of the drain pipe (3) facing the inner side (1.1) is provided with a reverse filter bag (8).

4. The horizontally drained buttress wall of claim 3, wherein: the reverse filter bag (8) is prepared by wrapping gravels with non-woven fabrics.

5. The horizontally drained buttress wall of claim 1, 2 or 3, wherein: vertical drainage blanket (4) adopt the grit material to lay and form, vertical drainage blanket (4) form the intercommunication passageway of all drain pipes (3) in vertical.

6. The horizontally drained buttress wall of claim 1, 2 or 3, wherein: the horizontal drainage layer (6) is formed by paving sand and stone materials, and the horizontal drainage layer (6) forms a drainage channel in the horizontal direction.

7. The horizontally drained buttress wall of claim 1, 2 or 3, wherein: the first backfill layer (5) and the second backfill layer (7) are formed by filling soil, and the filling height of the first backfill layer (5) is 1/3-1/2 of the height of the retaining wall body (1).

8. The horizontally drained buttress wall of claim 1, 2 or 3, wherein: and third backfill layers (9) are arranged on the back sides of the first backfill layer (5), the horizontal drainage layer (6) and the second backfill layer (7), and the third backfill layers (9) are formed by filling coarse sand.

9. The horizontally drained buttress wall of claim 8, wherein: and a clay layer (10) is filled between the bottom surface of the third backfill layer (9) and the side surface of the retaining wall bottom plate (2).

10. The horizontally drained buttress wall of claim 1, 2 or 3, wherein: a plurality of cast-in-place piles (11) are arranged below the retaining wall bottom plate (2).