CN110984238A - HDPE (high-density polyethylene) film-bentonite composite vertical anti-seepage wall system and construction equipment and construction method thereof - Google Patents
HDPE (high-density polyethylene) film-bentonite composite vertical anti-seepage wall system and construction equipment and construction method thereof Download PDFInfo
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- CN110984238A CN110984238A CN201911032265.9A CN201911032265A CN110984238A CN 110984238 A CN110984238 A CN 110984238A CN 201911032265 A CN201911032265 A CN 201911032265A CN 110984238 A CN110984238 A CN 110984238A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/004—Sealing liners
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
- E02D2300/0015—HDPE
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0037—Clays
- E02D2300/004—Bentonite or bentonite-like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
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Abstract
The invention discloses an excavation-free HDPE film-bentonite composite vertical barrier wall system for rapid construction, which is characterized in that: the ground is punched to loosen the foundation, the HDPE film is placed in a vertical vibrating mode, the lower end of the HDPE film is connected with a wedge-shaped steel head, the wedge-shaped steel head is inserted into an underground clay layer to play a role in separating a vertical joint, the HDPE film is wrapped in a vertical steel plate clamp to be vibrated and constructed, the vertical steel plate is inserted into a connecting groove at the top end of the lower end wedge-shaped steel head, the vertical steel plate is vertically spliced through a connecting device, the steel plate can be extracted after the vertical steel plate is vibrated to the designed depth, bentonite is added into a reserved gap through the steel plate, and the HDPE film-bentonite composite vertical. The HDPE film is wrapped by the vertical steel plate in a clamping mode, so that the construction method is short in excavation-free construction period; the wedge-shaped steel head at the bottom of the separation wall system is inserted into the clay layer, and the separation effect is good when bentonite is added into the gap; the periphery and the bottom of a polluted area can be economically and effectively blocked, pollutants are effectively retained, and the pollutants are prevented from vertically infiltrating and horizontally diffusing along with underground water.
Description
Technical Field
The invention relates to an excavation-free HDPE film-bentonite composite vertical impervious wall system for rapid construction, and construction equipment and a construction method thereof.
Background
The pollutant blocking technology is more and more widely applied to the risk control of the polluted site as an effective measure of the risk control in recent years. The vertical blocking technology is mainly used for blocking and storing pollutants or changing the flow direction of underground water by using underground blocking so as to achieve the purpose of controlling the horizontal migration of the pollutants. The barrier wall needs to have better continuity and durability, the wall material has higher stability and corrosion resistance, and the effect of pollutants cannot cause the weakening or failure of the barrier function. The traditional excavation type vertical impervious wall has large project amount, long construction period and poor impervious effect, and the HDPE film-bentonite composite vertical impervious barrier wall becomes the future development direction of the vertical impervious technology.
Disclosure of Invention
The invention aims to provide an HDPE film-bentonite composite vertical impervious wall system for excavation-free rapid construction, aiming at the problems of large construction amount, long construction period and poor impervious effect of the traditional excavation-type vertical impervious wall.
In order to solve the technical problem, the invention is solved by the following technical scheme: the HDPE film-bentonite composite vertical cut-off wall system is characterized in that a row of loose holes are respectively arranged on two sides of a separation boundary, a wedge-shaped steel head is arranged at the bottom of the HDPE film, the HDPE film is inserted along the separation boundary, and the HDPE film and bentonite arranged on two sides of the HDPE film jointly form the HDPE film-bentonite composite vertical cut-off wall system.
Furthermore, the aperture of the loose hole is in direct proportion to the hardness of the soil layer and is not less than 50 mm; the distance between two adjacent holes in the same row is inversely proportional to the soil hardness and is not more than 2 m.
Furthermore, the lower end of the bottom wedge-shaped steel head is in a knife-edge shape and is inserted into an underground clay layer; the thickness of the bentonite is 5-10 cm.
The invention also aims to provide construction equipment of the HDPE film-bentonite composite vertical impervious wall system aiming at large project amount, long construction period and poor seepage prevention effect of the traditional excavation type vertical impervious wall.
In order to solve the technical problem, the invention is solved by the following technical scheme: construction equipment of HDPE film-bentonite composite vertical impervious wall system, and is characterized in that the construction equipment comprises
The ground punching construction system is used for striking two rows of holes along the inner side and the outer side of the separation boundary to loosen the foundation;
the vertical vibration construction system comprises a wedge-shaped steel head, vertical vibration steel plates and an HDPE (high-density polyethylene) film, wherein the upper end of the wedge-shaped steel head is connected with the HDPE film, grooves are formed in two sides of the upper end of the wedge-shaped steel head, the bottoms of the two vertical vibration steel plates are respectively inserted into the grooves in the two sides of the wedge-shaped steel head, and the HDPE film is clamped between the two vertical vibration steel plates; and (3) knocking into a wedge-shaped steel head along the separation boundary, inserting the two vertical vibrating steel plates into the ground together with the HDPE film, pulling out the two vertical vibrating steel plates, and adding bentonite into two gaps left by pulling out the steel plates to form the HDPE film-bentonite composite vertical separation wall system.
Further, the ground is punched, loose holes are distributed in two rows of inner rows and outer rows along the blocking boundary, and the hole diameter is in direct proportion to the hardness of the soil layer and is not less than 50 mm; the distance between two adjacent holes in the same row is inversely proportional to the soil hardness and is not more than 2 m.
Further, the HDPE membrane connecting device that corresponds is established at both ends about the HDPE membrane, and edge embedding HDPE membrane connecting device's inboard about the HDPE membrane, the HDPE membrane connecting device's at HDPE membrane both ends outside sets up socket and bellmouth respectively.
Furthermore, wedge steel head lower extreme is the sword mouth form, inserts underground clay layer during the construction and plays the perpendicular junction separation effect.
The invention further aims to provide a construction method of the HDPE film-bentonite composite vertical impervious wall system aiming at large project amount, long construction period and poor seepage prevention effect of the traditional excavation type vertical impervious wall.
In order to achieve the purpose, the technical scheme of the invention is as follows: a construction method of an HDPE film-bentonite composite vertical impervious wall system is characterized by comprising the following steps:
A. striking two rows of holes along the inner side and the outer side of the separation boundary to loosen the foundation;
B. knocking into a wedge-shaped steel head along a separation boundary, connecting an HDPE (high-density polyethylene) film to the upper end of the wedge-shaped steel head, inserting two vertical vibrating steel plates into a groove of the wedge-shaped steel head, carrying out sandwich HDPE film vibrating construction, vertically splicing a plurality of steel plates until vibrating to a designed depth, pulling out the steel plates, and inserting the wedge-shaped steel head into a clay layer and retaining the HDPE film in a soil layer;
C. bentonite is added into two gaps left by pulling out the steel plate to form an HDPE film-bentonite composite vertical barrier wall system;
F. and D, continuously laying the HDPE films along the separation boundary through the HDPE film side edge connecting device, and repeating the construction from the step A to the step C until the HDPE film-bentonite composite vertical separation wall is completely laid on the field separation boundary.
The invention economically and effectively realizes the obstruction of the periphery and the bottom of the polluted area, effectively intercepts the pollutants and prevents the pollutants from vertically infiltrating downwards and horizontally diffusing along with the underground water.
Compared with the traditional PVC-U well pipe, the invention has the following advantages:
(1) the excavation-free HDPE film-bentonite composite vertical separation wall system for rapid construction adopts the ground punching to loosen the foundation and the vertical vibration construction mode, and has the advantages of small engineering quantity and short construction period.
(2) According to the excavation-free rapid construction HDPE film-bentonite composite vertical separation wall system, the connecting devices are arranged at the side edges of the HDPE films, and flexible connection arrangement can be performed according to the field shape.
(3) According to the excavation-free HDPE film-bentonite composite vertical separation wall system for rapid construction, the vertical vibrating steel plate can be pulled out for reuse, and the cost is saved.
(4) The HDPE film-bentonite composite vertical separation wall system free of excavation and rapid in construction has the advantages that the bentonite-HDPE film-bentonite mode group partition wall is good in separation effect and long in service life.
Drawings
Fig. 1 is a schematic view of an excavation-free rapid construction HDPE film-bentonite composite vertical barrier wall system according to an embodiment of the invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a top view of fig. 1.
Figure 4 is a cross-sectional schematic view of an HDPE film side edge attachment according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a wall elbow connection of an excavation-free rapid construction HDPE film-bentonite composite vertical barrier wall system according to an embodiment of the present invention.
FIG. 6 shows a hole-punched foundation having a loose hole according to an embodiment of the present invention.
In the drawings, the main reference symbols indicate:
1. vertically vibrating and hitting the steel plate; HDPE films; 3. a wedge-shaped steel head; HDPE film connection means; 5. a connecting screw hole; 6. connecting the jacks; 7. a field boundary; 8. and (5) loosening the hole of the foundation.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings 1 to 4 and examples:
the HDPE film-bentonite composite vertical anti-seepage wall system adopts ground punching to loosen a foundation, and then adopts a vertical vibration mode for construction, and main equipment comprises a ground punching construction system and a vertical vibration construction system.
The vertical vibration construction system comprises a vertical vibration steel plate, a bottom wedge-shaped steel head and an HDPE film.
Perpendicular strike steel sheet with perpendicular splicing apparatus (not shown in the figure), the lower extreme is provided with connecting screw 5 on the perpendicular strike steel sheet, and perpendicular strike steel sheet 1 and perpendicular splicing apparatus pass through connecting screw fixed connection, and perpendicular splicing apparatus has two effects: 1) connecting a plurality of steel plates, and inserting the steel plates to a designed depth; 2) the steel plate can be integrally pulled out by vibrating to the designed depth for repeated use.
During construction, the lower ends of the vertical vibrating steel plates are inserted into the bottom wedge-shaped steel head connecting grooves, and the two steel plates are wrapped with HDPE films for vibrating construction.
The lower end of the bottom wedge-shaped steel head is in a knife-edge shape, and is inserted into an underground clay layer during construction to play a role in blocking a vertical connection part; the middle part of the upper end of the wedge-shaped steel head at the bottom is in seamless connection with the HDPE film, grooves are formed in two sides of the upper end of the wedge-shaped steel head and are connected with the vertical vibrating steel plate, the width of each groove is 1-2 cm larger than the thickness of the vertical vibrating steel plate, and the vertical vibrating steel plate can be conveniently pulled out.
HDPE membrane side edge is equipped with HDPE membrane connecting device, can connect in a flexible way according to the place shape and arrange, preferably, the HDPE membrane is 2~4 mm's of thickness HDPE geomembrane. As shown in the figure, the outer sides of the HDPE film connecting devices on the two sides of the HDPE film are respectively provided with a socket and a socket so as to be connected with the HDPE film which is driven in the early stage or the later stage.
And (3) adding bentonite into the two gaps left by pulling out the vertical vibrating steel plate, wherein the thickness of the bentonite is 5-10 cm, and forming the HDPE film-bentonite composite vertical separation wall system.
In a specific embodiment, the aperture of the foundation loose holes 8 is 60mm, the loose holes are distributed in two rows inside and outside the blocking boundary, the distance between two adjacent holes in the same row is 1m, and the punching depth is 15 m.
The HDPE membrane is inlayed in 3 upper ends middle parts of wedge steel head, and the upper end both sides are equipped with the recess, and the recess width is 60mm, and the lower extreme is the sword mouth form, and wedge steel head is long 2.8m, and is high 0.3 m.
The vertical vibration steel plate 1 is a steel plate with the thickness of 50mm, the upper end and the lower end of the steel plate are provided with connecting screw holes 5, each steel plate is 3m long and 2m high, and the vibration depth is 15 m.
HDPE geomembrane that thickness is 2mm is selected to HDPE membrane 2, and HDPE membrane connecting device 4 is embedded into to the edge about, and HDPE membrane connecting device 4 selects the cross section to mould the material for spill and convex PVC-U, and high 2m is provided with connect jack 6 for a plurality of HDPE membrane connecting device of vertical fixation vertical direction.
The bentonite is nano bentonite, and the nano bentonite is added on two sides of the HDPE film, wherein the adding thickness is 50mm, and the adding depth is 15 m.
The excavation-free rapid construction HDPE film-bentonite composite vertical barrier wall system comprises the following steps:
(1) setting the aperture and hole spacing of the punching construction, the insertion depth of the vertical vibrating steel plate, the thickness of the HDPE film and the connection mode according to the boundary range of the polluted site, the depth of the clay layer and the geological conditions;
(2) striking two rows of holes along the inner side and the outer side of the separation boundary to loosen the foundation;
(3) knocking into a wedge-shaped steel head (the upper end of the steel head is connected with an HDPE (high-density polyethylene) film) along the separation boundary, inserting two vertical vibrating steel plates into the groove of the wedge-shaped steel head, carrying out clamping and wrapping HDPE film vibrating construction, vertically splicing a plurality of steel plates until vibrating to a designed depth, pulling out the steel plates, and inserting the wedge-shaped steel head into a clay layer and retaining the HDPE film in a soil layer;
(4) bentonite is added into two gaps left by pulling out the steel plate to form an HDPE film-bentonite composite vertical barrier wall system;
(5) and (3) continuously laying the HDPE films along the separation boundary through the HDPE film side edge connecting device, and repeating the construction from the step (2) to the step (4) until the HDPE film-bentonite composite vertical separation wall is completely laid on the field separation boundary.
In conclusion, the excavation-free HDPE film-bentonite composite vertical separation wall system for rapid construction adopts the ground punching to loosen the foundation and the vertical vibration mode construction, so that the engineering quantity is small and the construction period is short; the side edge of the HDPE film is provided with a connecting device, and flexible connection arrangement can be performed according to the field shape; the vertical vibrating steel plate can be pulled out for repeated use, so that the cost is saved; the bentonite-HDPE film-bentonite mode group partition wall has good blocking effect and long service life. The barrier wall system can economically and effectively realize the barrier between the periphery and the bottom of a pollution area, effectively trap pollutants and prevent the pollutants from vertically and horizontally permeating along with underground water.
Claims (8)
1. The HDPE film-bentonite composite vertical cut-off wall system is characterized in that a row of loose holes are respectively arranged on two sides of a separation boundary, a wedge-shaped steel head is arranged at the bottom of the HDPE film, the HDPE film is inserted along the separation boundary, and the HDPE film and bentonite arranged on two sides of the HDPE film jointly form the HDPE film-bentonite composite vertical cut-off wall system.
2. The HDPE film-bentonite composite vertical barrier wall system of claim 1, wherein: the aperture of the loose hole is in direct proportion to the hardness of the soil layer and is not less than 50 mm; the distance between two adjacent holes in the same row is inversely proportional to the soil hardness and is not more than 2 m.
3. The HDPE film-bentonite composite vertical barrier wall system of claim 2, wherein: the lower end of the bottom wedge-shaped steel head is in a knife-edge shape and is inserted into an underground clay layer; the HDPE geomembrane is an HDPE geomembrane with the thickness of 2-4 mm; the thickness of the bentonite is 5-10 cm.
4. Construction equipment of HDPE film-bentonite composite vertical impervious wall system, and is characterized in that the construction equipment comprises
The ground punching construction system is used for striking two rows of holes along the inner side and the outer side of the separation boundary to loosen the foundation;
the vertical vibration construction system comprises a wedge-shaped steel head, vertical vibration steel plates and an HDPE (high-density polyethylene) film, wherein the upper end of the wedge-shaped steel head is connected with the HDPE film, grooves are formed in two sides of the upper end of the wedge-shaped steel head, the bottoms of the two vertical vibration steel plates are respectively inserted into the grooves in the two sides of the wedge-shaped steel head, and the HDPE film is clamped between the two vertical vibration steel plates; and (3) knocking into a wedge-shaped steel head along the separation boundary, inserting the two vertical vibrating steel plates into the ground together with the HDPE film, pulling out the two vertical vibrating steel plates, and adding bentonite into two gaps left by pulling out the steel plates to form the HDPE film-bentonite composite vertical separation wall system.
5. The HDPE film-bentonite composite vertical cutoff wall system construction equipment according to claim 4, characterized in that: the ground is punched, loose holes are distributed in two rows inside and outside along the separation boundary, and the hole diameter is in direct proportion to the hardness of the soil layer and is not less than 50 mm; the distance between two adjacent holes in the same row is inversely proportional to the soil hardness and is not more than 2 m.
6. The HDPE film-bentonite composite vertical cutoff wall system construction equipment according to claim 4, characterized in that: the HDPE membrane connecting device that corresponds is established at both ends about the HDPE membrane, and edge embedding HDPE membrane connecting device's inboard about the HDPE membrane, the HDPE membrane connecting device's at HDPE membrane both ends outside sets up socket and bellmouth respectively.
7. The apparatus for constructing the HDPE film-bentonite composite vertical cut-off wall system according to claim 4, wherein the lower end of the wedge-shaped steel head is in a knife-edge shape, and the lower end of the wedge-shaped steel head is inserted into an underground clay layer during construction to block a vertical joint.
8. A construction method of an HDPE film-bentonite composite vertical impervious wall system is characterized by comprising the following steps:
A. striking two rows of holes along the inner side and the outer side of the separation boundary to loosen the foundation;
B. knocking into a wedge-shaped steel head along a separation boundary, connecting an HDPE (high-density polyethylene) film to the upper end of the wedge-shaped steel head, inserting two vertical vibrating steel plates into a groove of the wedge-shaped steel head, carrying out sandwich HDPE film vibrating construction, vertically splicing a plurality of steel plates until vibrating to a designed depth, pulling out the steel plates, and inserting the wedge-shaped steel head into a clay layer and retaining the HDPE film in a soil layer;
C. bentonite is added into two gaps left by pulling out the steel plate to form an HDPE film-bentonite composite vertical barrier wall system;
F. and D, continuously laying the HDPE films along the separation boundary through the HDPE film side edge connecting device, and repeating the construction from the step A to the step C until the HDPE film-bentonite composite vertical separation wall is completely laid on the field separation boundary.
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| CN201911032265.9A CN110984238B (en) | 2019-10-28 | 2019-10-28 | HDPE (high-density polyethylene) film-bentonite composite vertical anti-seepage wall system and construction equipment and construction method thereof |
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| CN201911032265.9A CN110984238B (en) | 2019-10-28 | 2019-10-28 | HDPE (high-density polyethylene) film-bentonite composite vertical anti-seepage wall system and construction equipment and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216271A (en) * | 2021-06-03 | 2021-08-06 | 上海远方基础工程有限公司 | Insertion type vertical film laying method |
| CN113235553A (en) * | 2021-05-27 | 2021-08-10 | 南京万德斯环保科技股份有限公司 | Sodium bentonite waterproof blanket-cement clay slurry composite vertical separation wall system and construction method thereof |
| CN113914375A (en) * | 2021-11-24 | 2022-01-11 | 江苏鼎达建筑新技术有限公司 | Composite impervious wall based on geomembrane and cement soil and construction method |
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| CN108951675A (en) * | 2017-05-17 | 2018-12-07 | 北京高能时代环境技术股份有限公司 | HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation |
| CN109083203A (en) * | 2018-10-09 | 2018-12-25 | 北京高能时代环境技术股份有限公司 | A kind of vertical laying method of HDPE film |
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| US20170198451A1 (en) * | 2016-01-08 | 2017-07-13 | Powerchina Huadong Engineering Corporation Limited | Cofferdam deformation-adaptive impervious structure and construction method of composite geomembrane |
| CN108951675A (en) * | 2017-05-17 | 2018-12-07 | 北京高能时代环境技术股份有限公司 | HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation |
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| CN113235553A (en) * | 2021-05-27 | 2021-08-10 | 南京万德斯环保科技股份有限公司 | Sodium bentonite waterproof blanket-cement clay slurry composite vertical separation wall system and construction method thereof |
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