CN111842452B

CN111842452B - Permeable reactive barrier, box structure and reactive barrier implementation method

Info

Publication number: CN111842452B
Application number: CN202010787143.7A
Authority: CN
Inventors: 徐方才; 孙亮; 杨晓蓉; 江志安; 白雪; 翁嘉玲; 赵明华; 苗志斌; 胡微; 李云松; 刘健
Original assignee: Sinohydro Foundation Engineering Co Ltd
Current assignee: Sinohydro Foundation Engineering Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-03-22
Anticipated expiration: 2040-08-07
Also published as: CN111842452A

Abstract

The invention discloses a box structure of a permeable reactive barrier, the permeable reactive barrier and an implementation method, wherein the method comprises the following steps: excavating underground slotted holes; arranging an outer frame device in the underground slotted hole, wherein the outer frame device comprises a plurality of frame units with preset seepage holes for water to flow out; a box body structure is arranged in the frame body unit by utilizing a special hoisting assembly, a reaction medium for removing pollutant components in underground water is arranged in the box body structure, and the box body structure is provided with a preset seepage hole for inflow and outflow of the underground water; when the box body structure is arranged in the frame body unit, the water stopping device is arranged between the box body structure and the frame body unit, so that the water passing channel between the box body structure and the frame body unit is blocked by the water stopping device, and the underground water flows through the preset seepage holes. The method can realize the construction of the groundwater permeable reaction wall under the condition of a complex stratum or a deeper part, and the box body structure can realize underwater stacking, can be repeatedly used and easily replaced, is more environment-friendly in treatment and low in cost.

Description

Permeable reactive barrier, box structure and reactive barrier implementation method

Technical Field

The invention relates to the field of remediation and treatment of underground water and soil pollution of environmental treatment, in particular to a box body structure of a permeable reactive barrier, the permeable reactive barrier and an implementation method thereof.

Background

The permeable reactive barrier of underground water is a kind of in-situ treatment system which realizes the restoration and treatment of underground water and soil pollution, specifically, after the underground water passes through the permeable reactive barrier, heavy metals or organic matters in the underground water and restoration medium in the reactive barrier produce a series of physical or chemical or biological actions such as degradation, precipitation and adsorption, etc., so as to realize the restoration of the underground water, so as to reach a certain discharge index.

The currently disclosed and visible methods for underground water permeable reactive barriers are all focused on treatment of surface shallow underground water, and complex geological conditions, polluted underground water or deeper soil remediation conditions cannot be realized; moreover, the general underground water permeable reactive barrier has the practical problems that the repair function of the underground water reactive barrier is passivated, and the repair efficiency is poor, and under the condition, the problem of incomplete pollution control inevitably exists; in addition, the permeable reactive barrier needs to be replaced with a reactive medium basically by reinstalling a reactive barrier system, and the repair medium is difficult to treat in a standard way in a common large excavation mode, so that the problem of secondary pollution exists, and the popularization and the use of the underground water permeable reactive barrier are greatly restricted by the defect.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a box structure of a permeable reactive barrier, the permeable reactive barrier and an implementation method thereof.

In order to achieve the above object, an aspect of the present invention provides a method of implementing a permeable reactive barrier, comprising:

excavating underground slotted holes with the depth below a impervious layer;

arranging an outer frame device prefabricated by concrete in the underground slotted hole, wherein the outer frame device comprises a plurality of frame units with preset seepage holes for water to flow out;

the prefabricated box body structures are arranged in a frame body unit of the outer frame device one by utilizing a special hoisting assembly, a reaction medium for removing pollutant components in underground water is filled in the box body structures, and the box body structures are provided with box body preset seepage holes for inflow and outflow of the underground water;

when the box body structure is arranged in the frame body unit, a water stopping device is arranged between the box body structure and the frame body unit, so that a water passing channel between the frame body unit and the box body structure is blocked by the water stopping device, and a permeable reaction wall for allowing underground water to flow through the preset seepage holes is formed.

Wherein, the box structure includes: the box body is provided with an upper panel, a lower panel and a panel connected with the upper panel and the lower panel; the feeding hole is formed in the upper panel of the box body and used for filling a reaction medium into the box body through the feeding hole; a plurality of hoisting holes which are arranged on the upper panel of the box body and are convenient for hoisting and positioning the box body by utilizing a special hoisting assembly; the guide support is arranged on the lower panel of the box body and is convenient for positioning the box body when the box body is connected with another box body.

Wherein, special hoist and mount subassembly includes: a hanger; at least one pair of guide lifting hooks symmetrically arranged at the bottom of the hanging bracket; and the lifting hook control rope is connected with the guide lifting hook and is used for controlling the action of the guide lifting hook.

The hanging bracket is triangular, and two sides of the bottom of the hanging bracket are respectively provided with a guide lifting hook; or the hanger is in a quadrangular pyramid shape, and the four corners are respectively provided with a guide lifting hook.

Wherein the hanger has a hollow hanger diagonal, the hook control line passing through the hanger diagonal.

When the outer frame device prefabricated by concrete is arranged in the underground slotted hole, the method also comprises the step of arranging a water stopping device in a gap between adjacent frame units.

Wherein, when the special hoisting assembly is used for arranging the box body structure in the frame body unit, the step of quickly aligning the box body structure with the frame body unit is included.

Wherein, make the box structure aim at the frame unit fast and include:

the box body structure is hung above the frame body unit and gradually lowered, so that the bottom of the box body structure is close to the upper part of the frame body unit;

in the process that the bottom of the box body structure approaches the upper part of the frame body unit, position information of the box body structure relative to the frame body unit is detected by using a position detection element arranged at the lower part of the box body structure, and the detected position information is sent to a control system;

and the control system processes the position information after receiving the position information, and if the processing result shows that the position of the box body structure relative to the frame body unit meets the preset position requirement, the box body structure is placed into the frame body unit.

The frame unit is at least a side-closed unit formed by pouring concrete, a plurality of transverse steel bars and a plurality of vertical steel bars, a sash or a plurality of sashes arranged in parallel along the horizontal direction are arranged in the unit, and the box structure is arranged in the sash.

The water stopping device is provided with a water stopping fixing part and a protruding body part which is inclined outwards from the water stopping fixing part and extends and is provided with an arc surface, when the water stopping device is arranged, the arc surface of the water stopping device is used as an upstream surface for receiving incoming flow of polluted water, the water stopping fixing part is fixedly connected with the inner surface of the sash, the tail end of the protruding body part is in close contact with the outer surface of the box body structure, or the water stopping fixing part is fixedly connected with the outer surface of the box body structure, and the tail end of the protruding body part is in close contact with the inner surface of the sash.

In addition, the invention also provides a permeable reactive barrier formed by the method, which comprises the following steps: underground slotted holes with the depth below the impervious bed; the outer frame device is arranged in the underground slotted hole and is prefabricated by concrete, and comprises a plurality of frame units with preset seepage holes for water to flow out; the prefabricated box body structure is arranged in a frame body unit of the outer frame device, a reaction medium for removing pollutant components in underground water is arranged in the box body structure, and the box body structure is provided with a box body preset seepage hole for allowing the underground water to flow in and out; the special hoisting assembly is used for hoisting the prefabricated box body structure and arranging the box body structure in the frame body unit one by one; and the water stopping device is arranged between the box body structure and the outer frame device so as to block a water passing channel between the outer frame device and the box body structure by utilizing the water stopping device.

The frame unit is at least a side-closed unit formed by pouring concrete, a plurality of transverse steel bars and a plurality of vertical steel bars, a plurality of sashes arranged in parallel along the horizontal direction are arranged in the unit, and the box structure is arranged in the sashes.

The frame units are sequentially arranged along the length extending direction of the underground slotted hole, and the frame units are connected through the water stopping device arranged between the two adjacent frame units on the left and right to form the continuous permeable reactive barrier.

Or the plurality of frame units are arranged front and back along the width direction of the underground slotted hole, and the plurality of frame units are connected through the water stop device arranged between the two adjacent frame units front and back to form the guide door type permeable reactive barrier.

Or the plurality of frame units are sequentially arranged along the length and the width direction of the underground slotted hole, and the plurality of frame units are connected through the water stop device arranged between the two adjacent frame units to form the large-flow gate guide type permeable reactive barrier.

The outer frame device comprises a back cover frame unit which is used for contacting with the bottom of the underground slotted hole and is a frame section which is formed by pouring concrete, a plurality of transverse reinforcing steel bars, a plurality of longitudinal reinforcing steel bars and a plurality of vertical reinforcing steel bars and is sealed at the side and the bottom.

Furthermore, the outer frame device also comprises a standard frame unit which is fixedly connected with the upper part of the back cover frame unit and is a frame section which is formed by pouring concrete, a plurality of transverse steel bars, a plurality of longitudinal steel bars and a plurality of vertical steel bars and is closed on the side surface.

Preferably, an alignment structure facilitating butt joint of the back cover frame unit and the standard frame unit is arranged between the back cover frame unit and the standard frame unit.

The water stopping device is provided with a water stopping fixing part and a convex body part which extends outwards in an inclined mode from the water stopping fixing part and is provided with an arc-shaped surface, the arc-shaped surface is used as an upstream surface for receiving incoming flows of polluted water, the water stopping fixing part is fixedly connected with the surfaces of the first frame units of the two adjacent frame units, and the tail end of the convex body part is in close contact with the surfaces of the second frame units of the two adjacent frame units.

Wherein the water stopping device comprises one or more water stopping units made of an elastic material.

The convex part extends outwards in an arc shape relative to the water stopping fixing part from the joint of the convex part and the water stopping fixing part.

Wherein, the protruding part includes first arcwall face and the second arcwall face that is the arc relative stagnant water fixed part and extends outwards.

Preferably, the radius of curvature of the second arcuate surface is greater than the radius of curvature of the first arcuate surface.

The water stopping device comprises one water stopping unit, or two or more than two water stopping units combined in the same direction, or one or more groups of water stopping units combined in opposite directions, wherein each group of water stopping units comprises two water stopping units.

The first arc-shaped surface of the water stopping unit convex part serves as the upstream surface, or the second arc-shaped surface of the water stopping unit convex part serves as the upstream surface.

And a water stop deformation hole is formed in the position, close to the water stop fixing part, of the first arc-shaped surface of the convex part.

Furthermore, deformable first deformation elements are arranged in the water stopping deformation holes, so that the water stopping units are extruded after the first deformation elements deform, and the water stopping units are arranged between the two adjacent frame units in an interference mode to block the water passing channel.

Wherein, the convex part second arc-shaped surface is provided with a tail ridge protruding outwards along the radial direction near the tail end.

Wherein, enclose between the first arcwall face of two stagnant water units of subtend combination and become to hold the chamber.

Furthermore, the accommodating cavity is internally provided with a deformable second deformation element, so that the second deformation element extrudes the water stopping unit after deformation, and the water stopping unit is arranged between two adjacent frame units in an interference manner to block the water passing channel.

In addition, the present invention also provides a tank structure of permeable reactive walls for use in the method as described above, comprising:

the box body is provided with an upper panel, a lower panel and a panel connected with the upper panel and the lower panel;

the feeding hole is formed in the upper panel of the box body and used for filling a reaction medium into the box body through the feeding hole;

a plurality of hoisting holes which are arranged on the upper panel of the box body and are convenient for hoisting and positioning the box body by utilizing a special hoisting assembly;

the guide support is arranged on the lower panel of the box body and is convenient for positioning the box body when the box body is connected with another box body.

Compared with the prior art, the box body structure of the permeable reactive barrier, the permeable reactive barrier and the implementation method thereof have the following beneficial effects:

1. the method is favorable for forming the permeable reactive barrier on the stratum with the deeper permeable layer, and each device is convenient and quick to arrange under water and can be repeatedly utilized, thereby effectively purifying the polluted underground water.

2. The invention adopts an outer frame device made of precast concrete, each frame body unit is of a single-lattice or multi-lattice structure and is divided into a standard frame section and a bottom sealing frame section, and the bottom sealing frame section adopts reinforced concrete bottom sealing; each frame section adopts a standard design, is of a reinforced concrete prefabricated structure, is prefabricated in batches in a factory, and can realize high prefabrication quality; the frame body unit has enough strength and strong interchangeability, can be repeatedly used and has relatively low cost;

3. the frame units can realize the combined installation of tandem, parallel and mixed arrangement structures by using the water stopping device, can realize the continuous structure and the guide door structure of the permeable reactive barrier, has an embedded pipe system for artificially manufacturing and controlling hydraulic gradient and accelerating the flow of underground water, and can be combined with a pumping and recharging system, thereby greatly improving the treatment efficiency of underground water; in addition, the frame unit can be loaded with a plurality of reaction media (different reaction media can be arranged in different lattices) at the same time, so that a plurality of pollutants can be treated at the same time.

4. The box body structure is arranged in the frame body unit of the permeable reactive barrier of the stratum with a deeper permeable layer, is prefabricated and formed, is easy to replace and more environment-friendly to process, expands the application space of the permeable reactive barrier, can be repeatedly used, has lower overall use cost, can be manufactured according to the seepage characteristics of the reactive barrier, avoids a free seepage channel, and can meet the specific seepage requirement of the reactive barrier.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Drawings

FIG. 1 is a flow chart of a method of implementing a permeable reactive barrier according to the present invention;

FIG. 2 is a schematic view of a first structure of the water stopping device of the present invention;

FIG. 3 is a schematic view of a second structure of the water stopping device of the present invention;

FIG. 4 is a schematic view of a third structure of the water stopping device of the present invention;

FIG. 5 is a schematic view of a fourth structure of the water stopping device of the present invention;

FIG. 6 is a schematic view of a fifth structure of the water stopping device of the present invention;

FIG. 7 is a schematic view of a sixth structure of the water stopping device of the present invention;

FIG. 8 is a schematic view of a seventh structure of the water stopping device of the present invention;

FIG. 9 is a schematic view of an eighth structure of the water stopping device of the present invention;

FIG. 10 is a schematic structural diagram of a permeable reactive barrier for implementing a water stopping method using a first water stopping device according to the present invention;

FIG. 11 is a schematic structural diagram of a permeable reactive barrier for implementing a water stopping method using a third water stopping device according to the present invention;

FIG. 12 is a schematic structural diagram of a fifth water stopping device for implementing a water stopping method by using a permeable reactive barrier according to the present invention;

FIG. 13 is a schematic structural diagram of an eighth water stopping device for implementing a water stopping method by using the permeable reactive barrier of the present invention;

FIG. 14 is a cross-sectional view of one configuration of the framing apparatus of the present invention;

FIG. 15 is a vertical cross-sectional view of one construction of the casing device of the present invention;

FIG. 16 is a longitudinal sectional view showing one construction of the outer frame device of the present invention;

FIG. 17 is an enlarged partial view of the structure shown in FIG. 16;

FIG. 18 is a cross-sectional view of a plurality of frame units of the present invention connected to form a continuous permeable reactive barrier;

FIG. 19 is a cross-sectional view of a plurality of frame units of the present invention connected to form a permeable reactive barrier of the guided door type;

FIG. 20 is a cross-sectional view of a plurality of frame units of the present invention connected to form a mass flow ducted permeable reactive barrier;

FIG. 21 is a schematic structural view of the case structure of the present invention;

FIG. 22 is a schematic structural view of a special lifting assembly of the present invention;

figure 23 is an enlarged view of a portion of the hoist assembly of figure 22.

Detailed Description

As shown in fig. 1, a flow chart of a method for implementing a permeable reactive barrier according to the present invention is shown, and the method includes:

excavating underground slotted holes with the depth below a impervious layer;

In addition, when the outer frame device prefabricated by concrete is arranged in the underground slotted hole, the method also comprises the step of arranging a water stopping device in the gap between the adjacent frame units so as to utilize the water stopping device to block the water passing channel between the adjacent frame units and enable the underground water to flow through each preset seepage hole.

The permeable reactive barrier technology is an in-situ restoration treatment technology for removing pollutant components in underground water by using a specific reaction medium through physical, chemical and biological degradation methods and the like, the reaction medium used by the permeable reactive barrier comprises reaction medium materials such as zero-valent iron, zeolite, microorganisms and the like, and the permeable reactive barrier is usually backfilled in a discrete shape for use.

Hereinafter, a method of implementing the permeable reactive barrier according to the present invention will be described in detail.

S01, excavating underground slot holes with the depth reaching below the impervious layer under water;

the underground slot hole adopts a specific polymer slurry to protect the wall, and the vertical excavation trenching equipment is used for excavating underwater and extending into an underwater relative impervious layer.

S02, arranging an outer frame device prefabricated by concrete in the underground slotted hole, wherein the outer frame device comprises a plurality of frame units with preset seepage holes for water to flow out;

after the underground slotted hole is excavated, an outer frame device which is prefabricated by reinforced concrete is arranged below and in the underground slotted hole, the outer frame device can comprise one layer or a plurality of layers of frame units, each layer of frame unit comprises a plurality of frame units with preset seepage holes for water to flow out, and the structures of the frame units are the same.

The frame unit is at least a side-closed unit formed by pouring concrete, a plurality of transverse steel bars and a plurality of vertical steel bars, one or a plurality of sashes arranged at intervals along the horizontal direction are arranged in the unit, and the box body structure is arranged in the sashes.

When the permeable reactive barrier is installed, the plurality of frame units can be sequentially installed along the length extension direction of the underground slotted hole, and the plurality of frame units are connected to form a continuous modular permeable reactive barrier through the water stopping device 100 installed between the two adjacent frame units on the left and right (as shown in fig. 18); or, the plurality of frame units are arranged front and back along the width direction of the underground slotted hole, and the plurality of frame units are connected to form the guide door type modular permeable reactive barrier through the water stop device arranged between the two adjacent frame units (as shown in fig. 19); alternatively, the plurality of frame units are sequentially arranged along the length and width directions of the underground slotted hole, and the plurality of frame units are connected through the water stop device arranged between the two adjacent frame units in the left-right direction and the front-back direction to form the large-flow gate guide type modular permeable reactive wall (as shown in fig. 20).

No matter the outer frame device comprises one layer or multiple layers of frame units arranged along the depth direction of the underground slotted hole, the outer frame device comprises back cover frame units 400a (the number can be one or more) used for being in contact with the bottom of the underground slotted hole, namely, the frame unit at the lowest layer along the depth direction of the underground slotted hole is the back cover frame unit, and each back cover frame unit 400a in the frame unit is a frame section which is formed by pouring concrete, a plurality of transverse steel bars, a plurality of longitudinal steel bars and a plurality of vertical steel bars and is sealed at the side and the bottom (see fig. 14-16).

If the outer frame device comprises two layers of frame units, the outer frame device further comprises standard frame units 400b which are fixedly connected with the upper portions of the corresponding back cover frame units, namely, the second layer of frame units from bottom to top along the depth direction of the underground slot are all the standard frame units 400b, and the standard frame units 400b are frame sections which are formed by pouring concrete, a plurality of transverse steel bars, a plurality of longitudinal steel bars and a plurality of vertical steel bars and are closed in side faces.

If the outer frame device includes three or more layers of frame units, the standard frame unit 400b is used for the third and more layers of frame units from bottom to top in the depth direction of the underground slot.

Because a plurality of frame units of each layer of frame unit are arranged underwater, and each layer of frame unit cannot be accurately positioned in underwater operation, when the frame units are installed, a large gap exists between the adjacent frame units, so that the adjacent frame units need to be treated to prevent polluted water from flowing out from the gap between the adjacent frame units.

The water stopping device comprises a water stopping fixing part and a convex body part which extends from the water stopping fixing part in an outward inclined mode and is provided with an arc-shaped surface, the arc-shaped surface is used as an upstream surface for receiving the incoming flow of the polluted water body, the water stopping fixing part is fixedly connected with the surface of a first frame body unit of two adjacent frame body units, and the tail end of the convex body part is in close contact with the surface of a second frame body unit of the two adjacent frame body units. When in design, the water stopping device can comprise one or more water stopping units according to the length and width conditions of the frame body unit, and the water stopping units are all made of elastic materials.

The water stopping device between each layer of frame unit and the layer of frame unit forms one layer of reaction wall frame of the modularized permeable reaction wall, and the reaction wall frame is formed by the method, so that the construction of the complex formation condition or the deeper part groundwater permeable reaction wall can be realized, and the defect that the permeable reaction wall is difficult to install in the above situation in the prior art is avoided.

Hereinafter, the structure of the outer frame device and the method for forming a reaction wall frame using the same according to the present invention will be described in detail, taking an example in which the outer frame device includes two-layer frame units.

The frame units of the outer frame device for the reaction wall mainly comprise standard frame units and back cover frame units of a single-frame or multi-frame structure, the frame units are of a reinforced concrete structure which is designed according to the standard considering the stress state, namely, the back cover frame unit 400a is a frame section (namely, a frame section bottom back cover 411 is referred to as a back cover frame section hereinafter) which is formed by pouring concrete, a plurality of transverse reinforcing steel bars 402, a plurality of longitudinal reinforcing steel bars 401, a plurality of vertical reinforcing steel bars and reinforcing mesh and is sealed at the side and the bottom, and the standard frame unit 400b is a frame section (referred to as a standard frame section hereinafter) which is formed by pouring concrete, a plurality of transverse reinforcing steel bars, a plurality of longitudinal reinforcing steel bars, a plurality of vertical reinforcing steel bars and reinforcing mesh and is sealed at the side. In order to facilitate the rapid positioning of the standard frame section and the back cover frame section during the vertical butt joint, an alignment structure is arranged between the standard frame section and the back cover frame section, and the alignment structure can adopt a convex-concave alignment structure arranged between two adjacent frame sections, such as a groove 409 arranged at the top end of the back cover frame section and a boss 410 arranged at the bottom end of the standard frame section, or the boss is arranged at the top end of the frame section positioned below the adjacent frame section, and the groove is arranged at the bottom end of the frame section positioned above the adjacent frame section.

The standard frame section and the back cover frame section are connected in a stacking mode through high-strength bolts, therefore, when the frame sections are poured, an operation cavity 406 and a reserved bolt hole 405 (see fig. 16 and 17) which are convenient for high-strength bolt connection operation are arranged on the outer sides of corresponding corners or cross positions of the standard frame section and the back cover frame section, openings of the operation cavity 406 and the reserved bolt hole 405 are respectively arranged on the butt joint surfaces of the two butt joint frame sections, and the reserved bolt hole 405 is located in the operation cavity 406, so that the standard frame section and the back cover frame section are in up-down butt joint through the high-strength bolts. During design, the aperture of the reserved bolt hole is not smaller than 25mm, the reserved bolt hole is positioned on the inner side of the outer steel bar at the corresponding position of the standard frame section and the back cover frame section, the position of the reserved bolt hole 405 arranged on the frame section can be additionally provided with the reinforcing steel bar, the thickness of the operation cavity 406 is not more than two thirds of the thickness of the frame section, and the width and the thickness of the operation cavity 406 meet the purpose of fastening the high-strength bolt.

A plurality of hanging rings 412 for hanging the frame sections and fixing the frame sections through slotted holes can be arranged on the periphery or the outer side of the middle part of the top of each frame section, and the hanging rings 412 are welded with the vertical stress ribs of the frame sections. During design, the size and the structure of the hanging ring 412 need to be considered, the installation of the later frame section is not affected, and the hanging ring 412 needs to meet the requirements of simultaneous hoisting and lateral fixing of the frame section.

In addition, a plurality of PVC pipes can be pre-embedded on the side walls of the frame sections along the height direction of the frame sections to form a detection hole 407, and a plurality of PVC pipes can be pre-embedded on the side walls of the frame sections along the width and/or length direction of the frame sections to form a reserved seepage hole 408 for groundwater to flow into the frame sections and flow out of the frame sections. Prefabricating each frame section, wherein a seepage upstream side (namely a water facing side) and a downstream side (namely a water backing side) of each frame section are respectively provided with a horizontal seepage hole 408 and a vertical detection hole 407, and a PVC pipeline is fixed during steel bar binding, wherein a detection pipe for forming the detection hole can be connected into a whole through a reducing pipe and a four-way pipe, the inner diameter of the detection pipe is 32-65 mm, and the inner diameter of a pipe for the seepage hole is not more than 32 mm; the pre-buried pipe of inspection hole at frame festival top needs to lay the reducing pipe that the standard pipe diameter is bigger more than one-level, and the balanced error when being convenient for upper and lower frame festival stacks the butt joint makes the inside butt joint of inspection pipe smooth and easy.

The left, right, inner and outer sides of the frame section relative to the seepage upper and lower sides can be reserved with embedded

parts

403 and 404 for installing and fixing water stopping devices according to needs, the embedded parts can be iron plates, are attached to the inner side wall and the outer side wall of the frame section and are cast into a whole, so that when the frame section is arranged below, a special water stopping device is arranged in or outside the frame section, and the purpose of combining and sealing a seepage channel between seepage guide of a reaction wall and an adjacent frame body is achieved. During design, a water stopping operation hole needs to be reserved on the upstream side of the water stopping device arranged inside the frame section, and the water stopping device is convenient to lay, bond and fix when being arranged below the frame section.

When the bottom sealing frame section and the standard frame section are manufactured, the same appearance structure is needed, the only difference is that the bottom of the bottom sealing frame section is sealed by adopting reinforced concrete, the reinforcing mesh is connected with the lateral reinforcing mesh of the frame section and poured into a whole, and the thickness of the bottom sealing frame section is not more than the lateral thickness of the frame section.

The invention adopts the water stopping device to realize water stopping between adjacent frame units, and the method comprises the following steps:

arranging a water stopping device between a first frame unit and a second frame unit which are adjacent in a permeable reactive barrier for treating underground polluted water, wherein the water stopping device is provided with a water stopping fixing part and a convex part which extends outwards in an inclined way from the water stopping fixing part and is provided with an arc-shaped surface;

when the water stopping device is arranged, the arc-shaped surface of the water stopping device is used as an upstream surface (namely, the surface with a higher water level) for receiving the incoming flow of the polluted water body, and the water stopping fixing part of the water stopping device is fixedly connected with the surface of the first frame unit, so that the tail end of the convex body part of the water stopping device is in close contact with the surface of the second frame unit;

when the polluted water body flows towards the gap between the two frame units, the polluted water body applies an acting force on the arc-shaped surface of the water stopping device, so that the tail end of the convex body part of the water stopping device is tightly attached to the surface of the second frame unit, the water stopping device blocks the water passing channel between the two adjacent frame units, and the polluted water body is prevented from flowing out through the water passing channel.

According to the structure of the modular reaction wall which can be formed by the outer frame device and is shown in figures 18-20, the invention is provided with water stop devices in the gaps between the left and right and/or front and back adjacent two frame units (the gap is a channel which is between the two frame units and can be used for allowing groundwater to freely flow through, namely a water passing channel), the water stop devices have the same structure and are provided with water stop fixing parts and convex body parts, the starting ends of the convex body parts are connected with the water stop fixing parts, the tail ends of the convex body parts extend outwards and obliquely relative to the water stop fixing parts, the water stop fixing parts are fixedly connected with the first frame unit in the adjacent frame units, the convex body parts are tightly contacted with the second frame unit in the adjacent frame units, the arc surfaces of the convex body parts are used as the upstream surfaces which are in contact with the incoming flow of the polluted water body, therefore, when the polluted water body flows to the gaps between the two frame units, the polluted water body is firstly contacted with the arc surfaces, the polluted water body can exert certain promotion effort to the arcwall face, and under the effect of this effort, water stop device's protruding body portion end can hug closely on the surface of second frame body unit to block the water channel between two adjacent frame body units completely through water stop device, and then avoid polluting the water body and cause the pollution via water channel outflow, to the low reaches of groundwater reaction wall.

The water stopping device of the invention can comprise one or more water stopping units, wherein the water stopping units comprise: a water stop fixing part, one surface of which is fixedly connected with the surface of the first frame unit; and the tail end of the convex part is in close contact with the surface of the second frame unit in the two adjacent frame units. When the water stopping unit is arranged between two adjacent frame units, the arc-shaped surface of the water stopping unit is used as an upstream surface for receiving the incoming flow of the polluted water body; when the polluted water body flows towards the gap between the two frame units, the polluted water body applies acting force to the arc-shaped surface of the water stopping unit, the tail end of the convex body of the water stopping unit is tightly attached to the surface of the second frame unit, so that the water stopping unit blocks the water passing channel between the two adjacent frame units, and the polluted water body is prevented from flowing out through the water passing channel. It should be noted that the positions of the first housing unit and the second housing unit may be interchanged.

During manufacturing, the water stopping unit is made of elastic materials, and the convex body part of the water stopping unit extends outwards in an arc shape relative to the water stopping fixing part from the joint of the convex body part and the water stopping fixing part. The convex body part comprises a first arc-shaped surface and a second arc-shaped surface which are outwards extended in an arc shape relative to the water stop fixing part, the curvature radius of the second arc-shaped surface is larger than that of the first arc-shaped surface, and the two arc-shaped surfaces are connected together at the tail end of the convex body part through connecting surfaces, namely, the width of the convex body part is gradually narrowed towards the tail end of the convex body part from the connecting part of the convex body part and the water stop fixing part.

When the water stopping device is arranged, the water stopping device can comprise a water stopping unit; or two or more than two water stopping units combined in the same direction are included; or one or more groups of water stopping units which are oppositely combined are included, and each group of water stopping unit comprises two water stopping units. And when the water stopping unit is arranged between two adjacent frame units, the first arc-shaped surface of the convex part of the water stopping unit can be used as the upstream surface, or the second arc-shaped surface of the convex part of the water stopping unit can also be used as the upstream surface.

Furthermore, the end part, close to the starting end, of the first arc-shaped surface of the convex body part can be provided with a water stopping deformation hole, and a deformable first deformation element is arranged in the water stopping deformation hole, so that the first deformation element extrudes the water stopping unit after deformation, and the water stopping unit is arranged between the two adjacent frame units in an interference mode to block the water passing channel. Further, a tail ridge protruding radially outward therefrom is provided near the tip end of the second arc-shaped face of the convex body portion.

When adopting two stagnant water units of subtend combination to form sealing device, the first arcwall face of two stagnant water units is relative and enclose between the two and become to hold the chamber, and is preferred, places deformable second deformation component in holding the intracavity to the second deformation component extrudees the stagnant water unit after warping, makes the stagnant water unit interference settle between two adjacent frame units in order to block water channel.

The structures of the water stopping device adopted by the invention can be respectively as follows.

As shown in fig. 10, in a plan view of the water stopping device 100 of the first structure installed between adjacent frame units, as can be seen from the figure, the water stopping device 100 of the structure includes one water stopping unit 10, and the water stopping unit 10 is installed between two adjacent frame units (only two frame units are shown in fig. 10, and in practical application, a plurality of frame units may be included, and the water stopping unit 10 of the present embodiment is installed between every two adjacent frame units), wherein the frame units may be prefabricated concrete structures.

The water stopping unit 10 is made of elastic materials, such as ethylene propylene diene monomer, so that the water stopping unit 10 has good elasticity, can be adaptive to gaps between adjacent frame units of the underground water reaction wall within a certain range, and has a good effect of blocking the flow of the polluted water body.

The water stopping unit 10 of the present invention may adopt a structure as shown in fig. 2, including: a water stop fixing part 3, one surface of which is fixedly connected with the surface of the first frame unit 200 in two adjacent frame units in the underground water reaction wall; the convex part which is connected with the other surface of the water stop fixing part 3 and extends outwards in an inclined way relative to the water stop fixing part 3 and is provided with an arc-shaped surface, and the tail end of the convex part is tightly contacted with the surface of the second frame unit 300 in the two adjacent frame units.

Specifically, as shown in fig. 2, the water-stopping fixing portion 3 of the water-stopping unit 10 is a long strip, one surface of the water-stopping fixing portion 3 is a plane and is fixedly connected with the surface of the first frame unit 200, when the water-stopping fixing portion is connected, the water-stopping fixing portion 3 can be fixed on the surface of the first frame unit 200 (the surface is poured with the above-mentioned outer water-stopping fixing member by embedding) through bolts and fixing pressing plates (see the fixing

pressing plates

8 and 9 in fig. 6, and only the fixing pressing plates at the connection positions of the two water-stopping units are shown in fig. 6, it should be understood that the length of the fixing pressing plates should be matched with the size of the two ends of the water-stopping fixing portion in this embodiment), correspondingly, through holes penetrating through the thickness are respectively provided at the two ends of the water-stopping fixing portion 3 as fixing holes 4, and matching counter bores or through holes (not shown in the figure) are provided at corresponding positions on the surface of the first frame unit 200. Alternatively, when connecting, a glue layer (see the glue layer 6 in fig. 5) may be coated on the one surface of the water stop fixing portion 3 to adhere the water stop fixing portion 3 to the smooth surface of the first frame unit 200, so that the two are adhered together, and when applying, a special glue capable of preventing water and resisting corrosion in the prior art may be used. Alternatively, the adhesive and the drilling press plate can be combined in a fixing mode, so that the adhesive and the drilling press plate are firmly fixed together. When the water-stop fixing portion 3 is fixed to the surface of the first housing unit 200, the water-stop fixing portion 3 and the surface of the first housing unit 200 are firmly fixed, and no penetration path is formed between the fixed surfaces.

The other surface of the water stop fixing part 3 is also a plane and is fixedly connected with the starting end of the convex part into a whole, the convex body part inclines outwards relative to the water stopping fixing part 3 from the joint of the convex body part and the water stopping fixing part 3 and extends in an arc shape, namely, the convex body part comprises a first arc-shaped surface a and a second arc-shaped surface b which extend outwards in an arc shape relative to the water stop fixing part 3, the curvature radius of the second arc-shaped surface b is larger than that of the first arc-shaped surface a, the tail ends (the tail end is the end far away from the water stop fixing part) of the first arc-shaped surface a and the second arc-shaped surface b are connected together through the connecting surface 1, that is, the width of the convex portion is gradually narrowed from the connection with the water stop fixing portion toward the tip thereof (see FIG. 2), and the joint of the second arc-shaped surface b and the connecting surface 1 is the tail end of the convex part, i.e. the tail end of the second arc-shaped surface b can be regarded as the tail end of the convex part.

During the preparation, connect face 1 can with stagnant water fixed part 3 another surface is perpendicular, also can be relative another surface slope setting, and the initiating terminal and the stagnant water fixed part 3 of first arcwall face an another surface be close to one end department and link together, make the initiating terminal and the stagnant water fixed part 3 of second arcwall face b another surface be close to another end department and link together, and the centre of a circle Oa of first arcwall face an, the centre of a circle Ob of second arcwall face b are located one side of first arcwall face a to curved structure in messenger's bulge portion and stagnant water fixed part form. Moreover, the length and size of the water stopping unit 10 are equal to or slightly smaller than the gap between two adjacent frame units (the gap is the length of the water passing channel), that is, the length between the surface of the water stopping fixing part of the water stopping unit for connecting the first frame unit and the tail end of the convex body part may be equal to or slightly smaller than the length of the water passing channel. In addition, the height of the water stopping unit 10 should be equal to the height of the adjacent frame unit during the manufacturing process, so as to completely block the polluted water body between the two adjacent frame units in height.

When the water stopping unit 10 is arranged between two adjacent frame units, the first arc-shaped surface a of the water stopping unit is used as an upstream surface (shown in fig. 10) facing the incoming flow of the polluted water body, when the polluted water body flows towards the gap between the two frame units, the convex part and the water stopping fixing part form an inner arc-shaped structure, and the water stopping unit 10 has elasticity, so that when the polluted water body applies acting force to the first arc-shaped surface a, the water stopping unit 10 can deform, the tail end of the convex part is tightly attached to the surface of the second frame unit 300, the water passing channel between the two adjacent frame units can be blocked by the water stopping unit, the polluted water body is prevented from flowing out through the water passing channel, and further the pollution to the downstream groundwater is avoided.

The water stopping unit for the water stopping device is made of ethylene propylene diene monomer, and is provided with a water stopping fixing part and a convex part which is inclined towards one side and extends in an arc shape, the special shape and structure enable the water stopping device to have good elastic deformation capacity and adapt to larger holes between adjacent frame units, and tail tips (tail ends and close to the tail ends) of the convex part can be self-adaptively used as water stopping points of the frame units in a pressed state, so that the water stopping effect is improved.

Or, the water stopping unit adopted by the water stopping device 100 of the present invention may also adopt a structure as shown in fig. 3, and on the basis of the structure of the water stopping unit, the water stopping device further includes a third arc-shaped surface c and a tail ridge 2, and the first arc-shaped surface and the third arc-shaped surface of the convex portion are used as the upstream surfaces, and when the water stopping device is arranged between two adjacent frame units, the arrangement mode of the water stopping device is the same as that of the water stopping device. Next, the difference between the water stop unit having the structure shown in fig. 3 and the structure shown in fig. 2 will be described in detail.

Because the first arcwall face an of stagnant water unit convex part is when meeting the water, the contaminated water that flows can form great impact force to the stagnant water unit, in order to prevent that the junction between first arcwall face a and the stagnant water fixed part 3 from damaging because of producing stress concentration, this structure stagnant water unit still sets up third arcwall face c between first arcwall face a and stagnant water fixed part 3, can increase the joint strength between convex part and the stagnant water fixed part 3 through the third arcwall face, and make to form between the two and be connected in the same direction as the cunning.

Specifically, the initiating terminal of the third arc-shaped surface c is connected with the other surface at the end close to the one end of the water stop fixing part 3, the tail end of the third arc-shaped surface c is connected with the initiating terminal of the first arc-shaped surface a, the initiating terminal of the second arc-shaped surface b is connected with the water stop fixing part 3 at the other end of the other surface close to the other end, the curvature radius of the second arc-shaped surface b is larger than that of the first arc-shaped surface a, the curvature radius of the third arc-shaped surface c is smaller than that of the first arc-shaped surface a, and the circle center Oc of the third arc-shaped surface c, the circle center Oa of the first arc-shaped surface a and the circle center Ob of the second arc-shaped surface b are located on one side of the first arc-shaped surface a. Like this, the width of convex part and stagnant water fixed part junction is greater than the width of junction when being connected by first arcwall face is direct with the stagnant water fixed part, and when the protruding part was strikeed to the contaminated water, first arcwall face and third arcwall face played certain cushioning effect to the contaminated water jointly as the upstream face, and the stagnant water effect is better.

In order to further improve the water stopping effect of the water stopping unit, the tail ridge 2 protruding outwards (outwards pointing away from the direction of the first arc-shaped surface) along the radial direction of the second arc-shaped surface b is arranged at the tail end of the second arc-shaped surface b of the convex body part of the water stopping unit. The tail ridge 2 can be in an arc shape as shown in fig. 3, and the radius of the tail ridge 2 can be determined according to the situation when the tail ridge is designed. The structure that tail ridge 2 is arranged at the position, close to the tail end, of the protruding body portion is adopted, under the condition that the water stopping device is suitable for a large gap between the frame body units, the tail ridge 2 and the tail tip of the protruding body portion can be self-adaptively formed into respective water stopping points under the state of the pressure of a polluted water body, namely, under the impact action of the polluted water body, the water stopping unit deforms, the tail tip of the protruding body portion is tightly attached to the second frame body unit, a first heavy water stopping action point of the water stopping unit between the adjacent frame body units is formed, the outer edge of the tail ridge 2 can be tightly attached to the second frame body unit, a second heavy water stopping action point of the water stopping unit between the adjacent frame body units is formed, and the double water stopping action can effectively prevent the polluted water body from leaking out from the adjacent frame body units.

Alternatively, the water stopping unit for the water stopping device 100 of the present invention may also have a structure as shown in fig. 4, which is basically the same as the structure of fig. 3, but is different therefrom in that the water stopping unit further has a water stopping deformation hole 5.

As shown in fig. 4, a water stop deformation hole 5 is provided at a position of the first arc-shaped surface a of the water stop unit convex part close to the water stop fixing part 3, and preferably, the water stop deformation hole 5 is provided at a junction of the first arc-shaped surface a and the third arc-shaped surface c, and is a circular hole with an opening provided on the two arc-shaped surfaces and recessed towards the second arc-shaped surface.

When settling the stagnant water unit between adjacent framework unit (see fig. 11), set up first arcwall face a and the third arcwall face c in stagnant water deformation hole 5 and regard as the upstream face, when polluting the water and strike these two arcwall faces, stagnant water deformation hole can suitably warp, makes the arcwall face have certain self-adaptation ability, promptly, makes the stagnant water unit have certain self-adaptation ability for the clearance between two adjacent framework units can better be adapted to the stagnant water unit, prevents to have infiltration passageway between two adjacent framework units.

Alternatively, the water stopping unit for the water stopping device 100 of the present invention may also adopt a structure as shown in fig. 5, which is substantially the same as the structure of fig. 4 except that the water stopping unit is provided with the deformable first deforming member 7 in the water stopping deformation hole 5.

As shown in fig. 5, the first deforming member 7 is a circular member, and when manufactured, the outer diameter of the member is equal to or slightly smaller than the diameter of the water stop deforming hole 5. Wherein the element is made of a material which can expand and deform in a certain degree, such as rubber, and can be an expansion strip which slowly expands after absorbing water or a small rubber tube which expands when pressing water. When the small pressurized water expansion rubber pipe is adopted, after the small pressurized water expansion rubber pipe is installed between adjacent frame units such as concrete structures, water is pressurized into the rubber pipe with an opening at one end through the pressure pump, the rubber pipe is expanded to be larger than the size of the water stop deformation hole 5 to compress the water stop unit, the opening of the rubber pipe is sealed after the rubber pipe is expanded to a preset degree, the expanded rubber pipe always applies pressure to the water stop unit, and therefore the water stop unit can achieve a water stop function with a higher water head or stability.

Wherein, after the stagnant water unit of figure 5 is installed between adjacent framework unit like adjacent concrete structure, install the downthehole first deformation element 7 of stagnant water deformation of stagnant water unit and can not influence the stagnant water function of stagnant water unit, but in the stagnant water later stage, promptly, pollute the water and strike stagnant water unit after the certain time, first deformation element 7 can provide extra inflation expansion and extrusion force to stagnant water unit, can provide the better stagnant water function of stagnant water unit, stop to have the infiltration passageway between two adjacent framework units.

Alternatively, the water stopping unit for the water stopping device 100 of the present invention may also adopt a structure as shown in fig. 6, which includes two water stopping units combined together in the same direction. In practice, the water stop unit shown in fig. 4 can be used.

Specifically, the water stop fixing portions of two water stop units with the same structure and provided with the water stop deformation holes in fig. 4 are connected end to end (the head refers to one end of the water stop fixing portion close to the third arc-shaped surface, and the tail refers to one end of the water stop fixing portion close to the second arc-shaped surface), namely, the tail end of the first water stop fixing portion abuts against the head end of the second water stop fixing portion, the surfaces of the two water stop fixing portions are on the same plane, and the first arc-shaped surface and the third arc-shaped surface of the convex portions of the two water stop units are arranged in parallel, so that the first arc-shaped surface and the third arc-shaped surface of the first water stop unit can be used as main upstream surfaces, and the first arc-shaped surface and the third arc-shaped surface of the second water stop unit can be used as auxiliary upstream surfaces. Thus, the double water stopping function of the two water stopping units can more effectively prevent a permeation channel from being formed between two adjacent frame units.

During the equipment, the head and the tail of two stagnant water units are connected and can be adopted 45 degrees scarf, and 45 degrees scarf are adopted respectively to the tail end of first stagnant water unit and the head end of second stagnant water unit promptly to adopt special powerful glue to bond the pressfitting connection, keep the smooth butt joint of connector, make area of contact increase between the connection face, connect more reliably. Of course, flush cuts between the connection faces may also be used.

When the assembled water stop device 100 is placed between adjacent frame units, as shown in fig. 12, the one surfaces of the water stop fixing portions of the two water stop units are brought into contact with the smooth surface of the first frame unit 200, and the convex portions of the two water stop units extend toward the second frame unit 300. And then, according to the required grade, the assembled water stop device is fixed on the adjacent frame units on the site, such as a concrete structure surface, by adopting glue or/and a drilling pressing plate by utilizing materials such as a fixing pressing plate. Compare the fixed pressing plate of implementing 3, the fixed pressing plate that two stagnant water units of this embodiment department of offseting used can be the long clamp plate of length slightly, promptly, this clamp plate can cover the position of connecting at two stagnant water units simultaneously, and two stagnant water units are fixed respectively on first frame unit 200 to a pair of bolt of rethread.

When polluted water flows to the gap between adjacent frame units, the polluted water contacts with the upstream surface of the first water stopping unit in the water stopping device, so that the water stopping unit deforms in a self-adaptive manner and is in close contact with the second frame unit through the tail tip and the tail ridge to play a water stopping role. When the flow velocity of the polluted water body is large or the polluted water body passes through the first water stopping unit due to other reasons, the second water stopping unit can generate self-adaptive deformation under the impact of the water body and is in close contact with the second frame unit through the tail tip and the tail ridge, so that the second water stopping effect is achieved.

Alternatively, the water stopping unit for the water stopping device 100 of the present invention may also have a structure as shown in fig. 7, which is the same as that shown in fig. 6, and two water stopping units are also used, and the two water stopping units are combined together in the same direction. Unlike fig. 6, the first deformation element 7 is disposed in the water stop deformation hole 5 of each water stop unit, that is, it can be understood that two water stop units in fig. 5 are adopted, and then the two water stop units are assembled together by using the combination manner of fig. 6 to form the water stop device. The water stopping principle of the water stopping device with the structure can be referred to the above principle, and the first deforming component 7 adopts the component in the above fig. 6, and the above will not be described again.

Alternatively, the water stopping unit for the water stopping device 100 of the present invention may have a structure as shown in fig. 8, and as can be seen from the figure, two water stopping units are combined in opposite directions, and in the implementation, the water stopping unit shown in fig. 4 may be used.

Specifically, the water stop fixing portions of the two water stop units with the same water stop deformation holes in the figure 4 are in tail-to-tail connection (tail, namely one end of the water stop unit water stop fixing portion close to the second arc-shaped surface), namely, the tail end of the first water stop fixing portion is abutted to the tail end of the second water stop fixing portion, and the two water stop fixing portions are arranged on the same plane on one surface, the first arc-shaped surfaces and the third arc-shaped surfaces of the protruding portions of the two water stop units are oppositely arranged, so that the second arc-shaped surface of the first water stop unit can serve as a main upstream surface, and the first arc-shaped surface and the third arc-shaped surface of the second water stop unit serve as auxiliary upstream surfaces.

When the water stopping device with the structure is arranged between two adjacent frame units, the surface of each of the two water stopping units is fixed on the smooth surface of the first frame unit in the above mode, the convex bodies of the two water stopping units extend towards the direction of the second frame unit, the tail tips of the convex bodies of the two water stopping units are in contact with the smooth surface of the second frame unit, and the second arc-shaped surface of the first water stopping unit faces the direction of water flow. And when two stagnant water units of subtend combination form sealing device, the first arcwall face of two stagnant water units, third arcwall face are relative and can enclose into between two pairs of arcwall faces and hold the chamber.

When two water stopping units are assembled, the tail connecting surfaces of the two water stopping units can adopt 45-degree inclined notches, namely the tail end of the first water stopping unit and the tail end of the second water stopping unit respectively adopt 45-degree inclined notches and are bonded and pressed for connection by adopting special strong glue, so that the connecting ports are smoothly butted, the contact area between the connecting surfaces is increased, and the connection is more reliable. Of course, flush cuts between the connection faces may also be used.

When the polluted water body acts on the second arc-shaped surface of the first water stopping unit, the tail tip of the first water stopping unit moves downwards under the action of the water body and is tightly attached to the surface of the second frame unit, and the tail ridge is tightly attached to the surface of the second frame unit. When the flow velocity of the polluted water body is large or other reasons and the polluted water body passes through the first water stopping unit, the polluted water body enters the accommodating cavity defined by the first water stopping unit and the second water stopping unit, two convex bodies of the two water stopping units expand outwards relatively under the acting force of the water body, and the tail tip and the tail ridge can be tightly attached to the surface of the second frame unit. Like this, through two stagnant water units of subtend arrangement, can better adapt to the clearance between adjacent framework unit, play dual stagnant water effect, can realize the stagnant water function of higher water pressure or stability, prevent to have infiltration channel between two adjacent framework units more effectively.

Alternatively, the water stopping unit for the water stopping device 100 of the present invention may also adopt a structure as shown in fig. 9, and as can be seen from the figure, the structure is basically the same as that of fig. 8, except that the structure is provided with a deformable second deforming member 9 in a receiving cavity enclosed by two water stopping units.

The accommodating cavity defined by the two water stopping units is approximately semicircular, correspondingly, the second deformation element 9 is also approximately semicircular, but the external dimension of the second deformation element 9 is equal to or slightly smaller than the size of the accommodating cavity. When manufactured, the second deforming element 9 is made of a material which can expand and deform in a certain degree of water absorption, such as a water-pressing expansion rubber hose made of rubber, or a rubber strip which slowly expands in water absorption (such as expansion 4-8 hours after water meeting). Similarly, when the pressurized-water expansion rubber pipe is adopted, after the second deformation element 9 is installed between adjacent frame units such as concrete structures, water is pressurized into the rubber pipe with an opening at one end through the pressure pump, the rubber pipe is expanded to be larger than the size of the accommodating cavity to compress the two water stopping units, the opening of the rubber pipe is sealed after the preset degree is reached, the expanded rubber pipe applies active pressure to the two water stopping units all the time, so that the two water stopping units can realize the water stopping function with higher water head or stability, a water passing channel is further blocked, and the water stopping effect and the long-term stability are greatly improved.

When the water stopping device of this embodiment is installed between adjacent frame units, the one surfaces of the two water stopping units are fixed on the smooth surface of the first frame unit in the above manner, the convex bodies of the two water stopping units extend toward the second frame unit, the tail tips of the convex bodies are in contact with the smooth surface of the second frame unit (see fig. 13), and the second arc-shaped surface of the first water stopping unit faces the direction of water flow. And a second deformation element 9 is arranged in a containing cavity enclosed between the two pairs of arc-shaped surfaces of the two water stop units.

In practical application, the water stopping devices with two water stopping units of the structure are in a group, and a plurality of groups of water stopping devices are arranged between adjacent frame body units.

The water stopping unit is made of ethylene propylene diene monomer rubber, and the ethylene propylene diene monomer rubber (EPDM) is formed in one step by a vulcanization process in a special factory, so that the water stopping unit is smooth and attractive in surface, and has excellent performances such as good elasticity, compression deformation resistance, weather aging resistance, ozone resistance, chemical stability resistance and the like.

When the combined water stopping device is applied, the water stopping unit processed in a factory is transported to a construction site, materials such as a fixing pressing plate, a slow expansion strip, a pressure expansion pipe and the like are prepared according to the required grade, and the combined water stopping device is fixed on one of two adjacent concrete structure surfaces on the site by adopting an adhesive or/and a drilling pressing plate; at fixed water stop device's in-process, determine water stop device's use quantity according to the operating mode, connect the multiunit water stop device in proper order and fill back between two concrete structures, need connect adjacent two sets of water stop device, then the face of connecting of the stagnant water unit of butt joint adopts 45 degrees scarf, and special powerful glue bonding pressfitting connection is adopted on the scene, keeps the smooth-going butt joint of connector. In addition, when a structure of a plurality of water stopping devices is adopted, the connecting seams of the water stopping units of the adjacent water stopping devices can be staggered by more than 30 centimeters. The installation precision of two adjacent precast concrete structures must meet the application gap range of the water stopping device in the embodiment, after installation and acceptance, if the deformation element adopts a pressure expansion rubber pipe, the pressure expansion rubber pipe is filled with water to pressurize the water stopping unit and stably maintain the pressure, so that the water stopping device meets the required water stopping function; if the deformation element of the water stopping device is provided with the pressure expansion rubber pipe, the pressure change in the rubber pipe can be observed, the working state of the water stopping device can be verified, the detection can be carried out through underwater camera shooting and the like, and the normal state of the water stopping device can be ensured by adjusting the position of the adjacent precast concrete structure.

In addition, the water stopping device 100 of the present invention may further include, on the basis of fig. 9, the first deforming member 7 (not shown in the figure) described above in the water stopping deforming hole 5 of each water stopping unit.

The water stopping device of the present invention may be configured by combining the water stopping units having the above-described configurations according to actual circumstances.

The water stopping device of the invention is unprecedented at home and abroad, can be used for stopping water between frame units made of underground precast concrete, and has the following advantages:

1. the water stopping unit of the water stopping device is made of ethylene propylene diene monomer, the structure of the water stopping unit comprises a water stopping fixing part and a convex body part which is inclined and convex towards one side, the tail part of the section of the convex body part is provided with a tail ridge and a tail tip, and the inner side surfaces of the convex body part and the water stopping fixing part are of an inner arc-shaped structure. Especially, a round hole with an opening, namely a water stop deformation hole is further arranged at the position, close to the water stop fixing part, of the convex body part, so that the water stop device can further realize the functions.

2. According to the working condition of use, can adopt a stagnant water unit, also can adopt the structure of two stagnant water unit combinations, can also adopt and form a set of for a combination with two stagnant water units, and adopt multiunit structure to, also can increase the slow expansion type sealing strip or the pressure expansion rubber tube on stagnant water unit to can realize many recombination forms, and then can reach the stagnant water function of dual or more than triple.

3. The slowly expanding type water stop strip or the water pressing expansion rubber pipe in the water stop unit of the water stop device does not influence the function of the water stop unit during installation, but can provide additional expansion and extrusion force at the later stage, and can realize higher water stop capacity and long-term stability.

4. All elements in the water stopping device are elastic structures, the frame units formed by the water stopping device and the precast concrete can be arranged linearly or in a curve mode, and as long as the frame units are in structural surface contact and the gap is smaller than the action range of the water stopping unit, the water stopping effect cannot be influenced.

5. According to the water stopping unit in the water stopping device, the water stopping fixing part can be fixed on the side surface of one frame unit in two adjacent concrete frame units through special adhesive or a pressing bar bolt, and the convex body part is in close contact with the surface of the other frame unit, so that the whole installation process is simple, and the operability is high.

Next, a process of forming a reaction wall casing by applying the water stop device and the casing unit will be described.

(1) Prefabrication processing of each frame unit: carrying out stress calculation according to the embedding depth of the frame units, designing required frame units, and then calculating and selecting, seepage capacity, number of frames and layout arrangement according to the functional requirements of the permeable reactive wall, thereby determining the specification number of the frame units and the layout of seepage holes; designing a shaping template according to the requirements of the sash, positioning the position of the prefabricated template in a prefabricated field, processing a reinforcing mesh, reserving the fixed installation of each pipeline and each embedded part, installing and fixing the template, pouring concrete, maintaining the frame body unit, and stacking for later use.

(2) Frame unit installation process:

frame unit installation preparation: lifting and fixing a first frame section (namely a bottom sealing frame section) for the reaction wall on a slotted hole, fixing or bonding a required internal water stopping device and/or an external water stopping device, laying a rubber water stopping belt at the top or coating a sealant to realize convex-concave platform sealing between an upper frame section and a lower frame section, laying or pasting a reverse filtering geotextile or a pressing strip outside a seepage hole area to cover the seepage area, and preparing a high-strength connecting bolt;

frame body installation butt joint: hoisting and stacking the second section of frame section (namely the standard frame section) on the upper section (namely the bottom sealing frame section) to ensure that a detection hole formed by the PVC embedded pipe is not blocked in butt joint; continuously laying an inner water stopping device and an outer water stopping device on the second section of frame section, fastening high-strength bolts and realizing the butt joint of the upper section and the lower section;

the frame body is arranged below: after the butt joint is completed, a few frame sections are lifted, the device with the upper section fixed at the hole opening is removed, two frame sections are arranged below to a proper position, the frame section (namely, the second frame section) positioned at the upper part is fixed at the hole opening of the groove, the next frame section is continuously butted, and the process is circulated until the whole frame unit is arranged below;

the frame is provided with the following components: according to the structure of the reaction wall, a plurality of frame units are sequentially arranged in the slot holes in the order of up and down and/or left and right and/or front and back, and water stopping devices are arranged between adjacent frame units until the frame units are completely installed, and in the installation process, the water stopping devices between adjacent frame sections need protection measures to ensure that the functions of the water stopping devices take effect;

backfilling the cracking slurry: to the space between the frame unit (such as frame unit 200 in fig. 18) and the cell wall 500 that is located outside, backfill granular gravel or coarse sand and fill, further, still can use the stagnant water module 600 of prior art between the two, then utilize pre-buried pipeline, to the sash inner space, carry out pressure water circulation (i.e., supply water to the seepage hole from the inspection hole, utilize the circulating pump to draw water, make the sash inside realize the hydrologic cycle), add suitable additive, adjust the PH value of polymer mud (mud is the mud that forms in the process of digging the slotted hole) in the frame, realize the decomposition of polymer mud, in order to ensure that the permeability of the stratum of frame unit is recovered, namely, rivers can normally flow.

After the installation of the reaction wall frame unit and the plugging and flow guiding measures of the peripheral underground water are finished, a box body structure with reaction media for treating the underground polluted water body can be arranged in the frame unit.

S03, arranging the prefabricated box structure in the frame unit of the outer frame device one by utilizing the special hoisting assembly, wherein a reaction medium for removing pollutant components in groundwater is arranged in the box structure, and the box structure is provided with a box preset seepage hole for groundwater to flow in and flow out.

In the process of forming one layer of frame body or multiple layers of frame bodies in the underground slot through the outer frame device and the water stop device, the box body structures which are box-shaped and are internally provided with reaction media for removing pollutant components in underground water are arranged in the lattices of the frame body units one by utilizing the special hoisting assembly.

The box structure 800 for loading the reaction medium of the present invention may adopt a structure as shown in fig. 21, that is, the box structure is a square box, and the box structure 800 includes: a box body which is provided with an upper panel, a lower panel and four side panels for connecting the upper panel and the lower panel, wherein each panel 803 can adopt a rectangular panel; a feed inlet 809 arranged on the upper panel of the box body, for filling reaction medium into the box body through the feed inlet 809; a plurality of lifting holes 806 provided on the top panel of the box body for facilitating lifting and positioning of the box body using a dedicated lifting assembly; a guide bracket 808 is provided on the lower panel of the housing to facilitate positioning of the housing when it is connected to another housing.

Specifically, during manufacturing, angle steels with proper sizes, such as an upper angle steel frame 802, a lower angle steel frame 801 and an angle support 804, are adopted to form each supporting frame of the box body, reinforced section steels are arranged at four corners connected with side panels, and the middle part is welded in a metal plate in an in-fit manner to serve as a vertical reinforcing support 805 of the box body. During processing, the external contact surface of the section steel, the longitudinal reinforcing brace 805 and the external contact surface of the frame are evenly and butt-jointed, and the welding position is polished smoothly, so that a special anti-seepage water stop device is conveniently installed and arranged.

The upper panel of the box body is symmetrically provided with openable feed inlets 809, and the side surface and the top surface or the bottom surface of the box body can be preset with required preset seepage holes according to the seepage direction. Four corners of the top panel at the top are provided with reinforced round holes as hanging holes 806, namely, the four corners of the top panel are respectively provided with hanging hole reinforced crossbars 807 fixedly connected with the frame, so as to realize the hoisting of the box body by utilizing the special hoisting assembly. Conical guide supports 808 are designed and arranged at four corners at the bottom of the box body, so that the upper box body and the lower box body can be stacked to achieve a guide function, and the aligned conical guide supports 808 of the upper box body can be just inserted into the hanging holes 806 of the lower box body.

And the special hoisting assembly for hoisting the box body structure 800 can adopt the following structure, including: a hanger; at least one pair of guide lifting hooks symmetrically arranged at the bottom of the hanging bracket; and the lifting hook control rope is connected with the guide lifting hook and is used for controlling the action of the guide lifting hook.

The hanger of the present invention may be a triangular hanger, and two guiding hooks 814 (as shown in fig. 22) are respectively disposed on two sides of the bottom of the hanger. When the box body structure is hoisted, the two triangular hanging frames are respectively arranged on the box body structure and positioned on two sides of the box body structure, so that four guide lifting hooks at the bottoms of the two hanging frames are respectively inserted into one lifting hole 806 corresponding to the box body, and then the two hanging frames are simultaneously hoisted by utilizing hoisting equipment to complete hoisting and lowering of the box body structure.

Alternatively, the hanger of the present invention may also be a quadrangular pyramid-shaped hanger (not shown), and the four bottom corners of the hanger are respectively provided with a guiding hook. When the box body structure is hoisted, the quadrangular pyramid-shaped hoisting frame is arranged above the box body structure, the four guide lifting hooks at the bottom of the hoisting frame are respectively inserted into the corresponding lifting holes 806 of the box body, and the hoisting equipment is reused to hoist the hoisting frame, so that the hoisting and the lowering of the box body structure are completed.

When a triangular hanger is used, the hanger comprises: a hanger bar 812; a hanger center pillar 811 having one end vertically connected to the middle of the hanger cross-brace 812; a pair of hanger struts 813 symmetrically disposed at both sides of the hanger cross-brace 812, wherein one end of each hanger strut 813 is fixedly connected to the hanger cross-brace 812, and the other end is fixedly connected to the other end of the hanger center pillar 811. A stable hanger for lifting the box structure can be formed by the hanger cross-brace 812, the hanger center post 811, and the pair of hanger diagonal braces 813.

A hanger connecting ring 815 which is convenient for hoisting is arranged at the top of the hanger, the hanger connecting ring 815 can be welded at the top of the hanger central column 811, a hanger suspension cable 816 is fixed on the hanger connecting ring 815, and the hoisting assembly and the hoisting equipment are connected together through the hanger suspension cable 816. In addition, the hanger diagonal brace 813 may be a hollow pipe, a through hole 818 (see fig. 23) is formed near a connection portion of the hanger diagonal brace 813 and the hanger center pillar 811, a steel wire rope is inserted into the hanger diagonal brace 813 to serve as a hook control rope 817 for controlling the operation of the corresponding guide hook 814, the upper end of the hook control rope 817 penetrates through the through hole 818, and the lower end of the hook control rope 817 is fixedly connected to the guide hook 814, so that when the upper end of the hook control rope 817 is pulled, the guide hook 814 can be driven to operate correspondingly. The guide hooks 814 are hinged to the bottom of the corresponding side of the hanger cross-brace 812, for example, connecting seats extending in the direction perpendicular to the hanger cross-brace 812 are respectively arranged at the two side bottoms of the hanger cross-brace 812, the bottom of each connecting seat is hinged to one guide hook, and the guide hooks 814 can rotate around the hinged position of the guide hooks and the connecting seats under the driving of the hook control ropes 817, so as to connect the box body.

To facilitate insertion of the guide hook 814 into the corner lifting hole 806 in the bin and connection to the bin, the guide hook 814 may be a regular triangle shaped hook that is positioned off-center from the connection block, i.e., the location of the guide hook 814 for hinging with the connection block is on one side (i.e., near its first acute angle) of the center of symmetry of the guide hook 814. A second acute angle is disposed downward along a direction perpendicular to the extension direction of the hanger cross-brace 812 (i.e., the second acute angle is away from the hanger), and a third acute angle is exposed to the coupling seat along the extension direction of the hanger cross-brace 812, so that, when the box body is to be lifted, the third acute angle of the guide hook 814 is slightly exposed out of the connecting seat and can be inserted into the corresponding hanging hole of the box body (at this time, the guide hook can be considered to be in a retracted state), when the box body is lifted, the guide hook 814 is controlled to rotate by the hook control rope 817, so that the guide hook 814 rotates reversely around the hinged part, so that the portion exposed out of the connection seat is tightly attached to the inner wall of the upper panel at the hanging hole of the box body, and the guide hook 814 is firmly locked with the box body (at this time, the guide hook can be considered to be in an outstretched state), so that the hoisting assembly is moved, the box body can be moved, and then underwater hoisting installation and hoisting-out actions of the box body in the sash of the frame unit are realized.

When the four-pyramid-shaped hanging frame is adopted, a plurality of hanging frame cross braces can be adopted to enclose the bottom frame shaped like a Chinese character 'tian', and then four hanging frame diagonal braces are adopted to be respectively fixedly connected with four corners of the bottom frame to enclose the four-pyramid-shaped frame. And the upper ends of the four hanger inclined struts are connected with the upper end of the hanger central column, the lower ends of the hanger central column are fixedly connected with the hanger cross strut at the center of the bottom frame, similarly, a hanger connecting ring and a hanger suspension cable are arranged at the upper end of the hanger central column, the four guide lifting hooks can be respectively arranged at the four corners of the bottom frame, and the connection between the guide lifting hooks and the bottom frame and the structure for controlling the guide lifting hooks to lock the box body can adopt the structure, which is not repeated here. When the four-hook type lifting hook is designed, the inward contraction or outward expansion of the guide lifting hook can be controlled through the lifting hook control rope, and the lifting hook can be fixed with the box body when being expanded.

The invention also includes an assembly for quick positioning of a dedicated lifting assembly for connection to a box structure, the assembly comprising: the device comprises a position detection element arranged at the lower part of the special hoisting assembly and a signal emission element which is arranged at the upper part of the box body structure and is used for being matched with the position detection element. In the process of lowering the special hoisting assembly, when the position detection element on the special hoisting assembly touches or receives the signal emission element on the box body structure, the related signal can be sent to the control system, so that whether the special hoisting assembly can be connected with the box body structure or not is judged through the control system.

During implementation, a proximity sensor can be arranged on a hanger cross brace or a connecting seat of the special hoisting assembly, a proximity sensor positioning block (not shown in the figure) is arranged near a hoisting hole 806 arranged on the upper panel of the box body, the proximity sensor is matched with the proximity sensor positioning block for use, and when the proximity sensor is close to the proximity sensor positioning block, the proximity sensor triggers and sends a signal to a control system so as to ensure that the guide lifting hook can be positioned at the hoisting hole.

Still further, the present invention includes an assembly for quickly positioning a case structure with a sash of a frame unit, the assembly comprising: the device comprises a position detection element arranged at the lower part of the box body structure and a signal emitting element which is arranged at the upper part of the corresponding sash of the frame body unit and is used for matching with the position detection element. In the process of lowering the box structure, when the position detection element on the box structure touches or receives the signal emission element on the box structure, the related signal can be sent to the control system, so that whether the box structure can be lowered into the corresponding sash is judged through the control system.

During the implementation, can set up one or more proximity sensor near bottom department at the side board of box structure, set up the proximity sensor locating piece on the upper portion of frame unit's sash inner wall to make proximity sensor and proximity sensor locating piece cooperation use, trigger and send the signal to control system when proximity sensor is close to the proximity sensor locating piece, in order to ensure that the box structure can settle fast in corresponding the sash.

In order to enable the processed box body structure and the special lifting appliance component to have corrosion resistance and long-term durability, the box body structure and the special lifting appliance component are directly processed by adopting a corrosion-resistant zinc plate or stainless steel material or general steel material, and are subjected to hot galvanizing or heavy anti-corrosion treatment so as to be suitable for long-term underwater use.

When the special hoisting assembly is used for arranging the box body structure in the frame body unit, the special hoisting assembly can be connected with the box body structure by using the assembly, and the box body structure can be quickly aligned to the frame body unit.

Wherein, utilize above-mentioned subassembly to make special hoisting assembly connect box structure to include:

hoisting the special hoisting assembly to the upper part of the box body structure and gradually lowering the special hoisting assembly so that the bottom of the special hoisting assembly is close to the upper part of the box body structure;

in the process that the bottom of the special hoisting assembly approaches the upper part of the box body structure, a proximity sensor arranged at the lower part of the special hoisting assembly is used for detecting the position information of the guide lifting hook relative to a lifting hole of the box body structure, and the detected position information is sent to a control system;

and the control system receives the position information and then processes the position information, and if the processing result shows that the position of the guide lifting hook relative to the lifting hole meets the requirement of a preset position, the guide lifting hook is inserted into the lifting hole and then is rotated by external force so as to be connected with the box body.

And the quick aligning box structure to the frame unit includes:

in the process that the bottom of the box body structure approaches the upper part of the frame body unit, a proximity sensor arranged at the lower part of the box body structure is used for detecting the position information of the box body structure relative to the frame body unit and sending the detected position information to a control system;

According to the invention, the quick positioning assemblies are respectively arranged between the special hoisting assembly and the box body structure and between the box body structure and the frame body unit, so that the purposes of quickly positioning the special hoisting assembly and the box body structure to connect the special hoisting assembly and the box body structure and quickly positioning the box body structure and the frame body unit to lower the box body structure into the frame body unit can be realized, the purpose of quickly forming the permeable reactive wall under water, particularly under deep water, is realized, the purification of polluted underground water is facilitated, and the later repair and reutilization of the permeable reactive wall are facilitated.

When the box body structure is arranged in the corresponding sash of the frame body unit, a water stopping device is arranged between the box body structure and the sash so as to block a water passing channel between the sash and the box body structure by using the water stopping device. The water stopping device can adopt the water stopping device arranged between the frame units, namely, the water stopping device is provided with a water stopping fixing part and a convex part which is obliquely extended outwards from the water stopping fixing part and is provided with an arc surface, when the water stopping device is arranged, the arc surface of the water stopping device is used as an upstream surface for receiving the incoming flow of the polluted water body, and the water stopping fixing part is fixedly connected with the inner surface of the sash, so that the tail end of the convex part is tightly contacted with the outer surface of the box structure, or the water stopping fixing part is fixedly connected with the outer surface of the box structure, so that the tail end of the convex part is tightly contacted with the inner surface of the sash.

The water stop device is arranged between the sash and the box structure in the same way as between the adjacent frame units, and will not be described again here. During manufacturing, the size of the box body structure is matched with the size of the sash of the frame body unit, and the length and the height of the water stopping device meet the requirement of a gap between the box body structure and the sash.

The construction and application points of the box structure of the present invention will be described below.

1) Manufacture of metal box structure

According to the design requirement of designing the permeable reactive barrier, the box body structure of the invention is designed in detail to meet the requirement of strength check, corresponding materials are prepared, the box body structure is shaped and manufactured in batches in a factory, a special hoisting assembly is processed, and appropriate anti-corrosion treatment is carried out;

2) metal box structure charging

Loading a reaction medium into the manufactured metal box structure in a factory workshop, and stacking nearby to be loaded and transported to the site under the lifting condition;

3) on-site loading

After the construction of the outer frame device of the reaction wall is completed by field installation, the box body structure is transported to the field and directly lifted and placed into the frame structure sash to be stacked from bottom to top; after the arrangement is finished, the special water stopping device for the pressure expansion water stopping device enables underground water to flow according to a designed seepage channel, and the operation of the modular permeable reactive barrier can be realized;

4) operation detection

After the reactor is put into operation, the operation condition of the reaction medium is known through sampling and detecting underground water at the downstream end, so that further measures can be taken conveniently;

5) medium replacement

According to the water quality detection condition, the problems of inactivation and passivation of reaction media, blockage of fillers and the like can occur, and the reaction media are required to be cleaned or updated according to actual needs, lifted out of the metal box body structure and replaced by new reaction media.

6) Media processing

The hoisted passivation medium metal box body structure is hoisted out to drain underground water, and then transported back to a factory for special treatment and storage of passivation reaction medium, so that secondary pollution is avoided;

7) device multiplexing

If the used metal box body structure is damaged, the maintenance cost is not high, and a new box body can be replaced; the special hoisting assembly of the metal box body structure can be repeatedly used, and only a small number of hoisting assemblies are needed, and the hoisting assembly is standby.

The box body structure of the invention has the following advantages:

(1) the metal box structure is a square metal box structure which is made of corrosion-resistant metal materials such as zinc plates or stainless steel in a factory, the metal box structure is processed in a standardized mode, the size standard is unified, the interchangeability is high, the metal box structure can be repeatedly used, and the reaction medium can be conveniently treated in a standardized and harmless mode;

(2) the top edge of the metal box body structure is a regular plane, and an anti-seepage water-stop adhesive tape can be fixed on the top edge; the side reinforcing support and the welding port connected with the upper frame of the box body are subjected to smooth treatment and can be in close contact with a special water stopping device; seepage holes can be preset on the side surface, the top surface or the bottom surface of the box body according to the seepage direction or the route of the reaction wall, so that the characteristics of local free seepage blocking and partition seepage are realized;

(3) four corners at the top of the metal box body structure are provided with reinforced hoisting round holes, and the box body is hoisted through a special hoisting assembly; the four corners at the bottom of the box body are provided with tapered guide supports, and when the upper box body and the lower box body are stacked, the tapered guide supports of the upper box body can be accurately guided into the lifting round holes of the lower box body; in addition, two charging openings are symmetrically arranged at the top of the box body, so that reaction media can be conveniently charged and can be opened and closed;

(4) the metal box structure is provided with an underwater special hoisting assembly, the special hoisting assembly is provided with two or four guide lifting hooks which are provided with thin steel cables and can be controlled to stretch, and the upper part of the special hoisting assembly is a triangular or quadrangular pyramid-shaped hanging bracket and a hanging point; two or four telescopic direction lifting hooks just in time can be balanced put into the circular hanging hole of square metal box structure, through thin wire rope control locking lifting hook, realize the handling of box structure under water.

The invention makes frame units from precast concrete, then arranges a plurality of frame units in underground slot holes and/or accessory areas according to the practical situation during construction, connects the plurality of frame units together through a water stop device to prevent underground polluted water from flowing through gaps among the frame units to pollute downstream, arranges a box structure in a frame lattice of each frame unit, realizes water stop effect through the water stop device arranged between the box structure and the frame units, and fills a reaction medium capable of treating pollution components of underground water in the box structure, thereby effectively purifying the underground water, and enables the purified underground water to flow out along preset seepage holes on the frame units (the preset seepage holes for the purified underground water to flow out are positioned at the downstream sides of the frame units and the box structure, namely at the back water surface side).

In conclusion, the method for realizing the permeable reactive barrier by the device is unprecedented at home and abroad, and has the following characteristics:

1. the devices adopted by the invention are beneficial to forming the permeable reactive barrier on the stratum with a deeper permeable layer, and the devices are convenient and quick to arrange under water and can be repeatedly utilized, thereby effectively purifying the polluted underground water.

3. the top of the standard frame section and the top of the sealing bottom frame section are butted through a preset aligning structure (a preset groove and a preset lug boss), the lug boss and the groove are processed smoothly, and a rubber waterstop can be paved or special sealant can be smeared on the periphery of the aligning structures of the upper frame section and the lower frame section, so that the sealing of the aligning structure between the adjacent frame sections is realized; the corner parts corresponding to the upper frame section and the lower frame section are preset with high-strength bolt connecting holes and an operation cavity as required, and the multiple frame sections can be stacked up and down and are fixedly butted by adopting high-strength screws, so that an upper and lower integrated prefabricated square cavity is formed.

4. The prefabricated concrete outer frame device is characterized in that PVC pipes are preset to form preset permeation holes according to the front and back preset PVC pipes in the flowing direction of underground water, PVC pipes are vertically arranged on the upper side and the lower side to form detection holes, the PVC pipes between the PVC pipes can be communicated through pipe fittings, the prefabrication requirement positions of the PVC detection pipes are accurate, the frame sections can be conveniently stacked and installed to achieve smooth through from top to bottom, and the prefabricated concrete outer frame device can provide sampling detection, on-line monitoring or provide auxiliary functions of pumping water or plugging the permeation pipes and the like.

5. The periphery of each frame section of the precast concrete outer frame device is provided with at least four lifting rings for the purposes of lifting the frame section or installing and fixing the slotted hole; the embedded parts connected by the water stopping devices are arranged inside and outside the outer frame section, the possibly required inner and outer water stopping devices are arranged during field installation, and mounting holes need to be reserved on the upstream side of the water stopping devices for the frame section needing inner water stopping, so that the inner water stopping devices are convenient to install and lay.

6. Smooth straight frame unit for load modularization reaction medium becomes reality, and can change reaction medium in a flexible way, promote the reaction medium that has the pollution and seal the processing, avoided secondary pollution, reaction medium can be loaded in following box structure, thereby can used repeatedly.

7. The frame units can realize the combined installation of tandem, parallel and mixed arrangement structures by using the water stopping device, can realize the continuous structure and the guide door structure of the permeable reactive barrier, has an embedded pipe system for artificially manufacturing and controlling hydraulic gradient and accelerating the flow of underground water, and can be combined with a pumping and recharging system, thereby greatly improving the treatment efficiency of underground water; in addition, the frame unit can be loaded with a plurality of reaction media (different reaction media can be arranged in different lattices) at the same time, so that a plurality of pollutants can be treated at the same time.

8. The box body structure can be loaded on a stratum with a deeper permeable layer and used as a loading unit and a loading module of a reaction medium of the modular permeable reactive barrier, and the box body structure has strong interchangeability, is easy to replace and maintain, is sealed by the medium and is more environment-friendly;

9. the box body structure can realize underwater stacking, all metal parts are subjected to anti-corrosion treatment and are repeatedly used, and the total use cost is low;

10. the box body structure of the invention can be provided with a special water stop device at the upper and lower stacking areas and the left and right supporting areas, thereby realizing the seepage guidance required by the permeable reactive barrier, realizing different seepage paths and optimizing the treatment effect.

Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and thus, various modifications made in accordance with the principle of the present invention should be understood to fall within the scope of the present invention.

Claims

1. A method of implementing a permeable reactive wall, comprising:

excavating underground slotted holes with the depth below a impervious layer;

at least one layer of frame units prefabricated by concrete is arranged in the underground slotted hole, wherein each layer of frame unit comprises a plurality of frame units with preset seepage holes for water to flow out, and each frame unit comprises at least one sash;

the prefabricated medium reaction boxes are arranged in each sash of each layer of frame unit one by utilizing a special hoisting assembly, reaction media for removing pollutant components in underground water are filled in the medium reaction boxes, and the medium reaction boxes are provided with box body preset seepage holes for inflow and outflow of the underground water;

the first water stopping device for preventing the polluted water from flowing out from a gap between the adjacent frame units of each layer of frame unit is arranged between the adjacent frame units, so that the water stopping device between each layer of frame unit and the layer of frame unit forms a layer of reaction wall frame body of the modular permeable reaction wall;

the second water stopping device is provided with a water stopping fixing part and a convex part which extends from the water stopping fixing part towards the outside in an inclined mode and is provided with an arc surface, the arc surface of the convex part serves as a water facing surface facing incoming flow of polluted water, the tail end of the convex part is in close contact with the inner surface of the frame, so that the tail end of the convex part and the tail end close to the tail end can be in a pressed state to be a water stopping point in a self-adaptive mode, a water passing channel between the frame and the medium reaction box is blocked, and a permeable reaction wall with underground water flowing through preset seepage holes is formed.

2. The method of claim 1, the dedicated lifting assembly comprising:

a hanger;

at least one pair of guide lifting hooks symmetrically arranged at the bottom of the hanging bracket;

and the lifting hook control rope is connected with the guide lifting hook and is used for controlling the action of the guide lifting hook.

3. The method of claim 2, wherein the hanger is triangular, and the two sides of the bottom are respectively provided with a guide hook; or the hanger is in a quadrangular pyramid shape, and the four corners are respectively provided with a guide lifting hook.

4. The method of any one of claims 1-3, wherein the step of positioning the media reaction cassette in the sash using a dedicated lifting assembly comprises the step of rapidly aligning the media reaction cassette with the sash.

5. The method of claim 4, wherein rapidly aligning the media reaction cassette to the sash comprises:

the medium reaction box is lifted to the upper part of the sash and gradually lowered so that the bottom of the medium reaction box is close to the upper part of the sash;

in the process that the bottom of the medium reaction box approaches to the upper part of the sash, a position detection element arranged at the lower part of the medium reaction box is used for detecting the position information of the medium reaction box relative to the sash and sending the detected position information to a control system;

and the control system processes the position information after receiving the position information, and if the processing result shows that the position of the medium reaction box relative to the sash meets the preset position requirement, the medium reaction box is put into the sash.

6. The method of claim 1, wherein the frame unit is an at least laterally closed unit formed by casting concrete, a plurality of transverse steel bars and a plurality of vertical steel bars, and the unit has one sash or a plurality of sashes arranged in parallel in a horizontal direction.

7. The method according to claim 6, wherein the first water stopping device has a water stopping fixing portion and a convex portion extending obliquely outward from the water stopping fixing portion and having an arc-shaped surface, and when the first water stopping device is installed, the arc-shaped surface of the first water stopping device is used as an upstream surface facing the incoming flow of the polluted water body, and the water stopping fixing portion is fixedly connected with the surface of the first frame unit in the adjacent frame unit, so that the tail end of the convex portion is in close contact with the surface of the second frame unit.

8. A permeable reactive barrier formed by the method of any one of claims 1 to 7, comprising:

underground slotted holes with the depth below the impervious bed;

at least one layer of frame units which are arranged in underground slotted holes and are prefabricated by concrete, wherein each layer of frame unit comprises a plurality of frame units with preset seepage holes for water to flow out, and each frame unit comprises at least one sash;

the prefabricated medium reaction box is used for being arranged in each sash of each layer of frame body unit one by one, reaction media used for removing pollutant components in underground water are arranged in the medium reaction box, and the medium reaction box is provided with a box body preset seepage hole for inflow and outflow of the underground water;

the special hoisting assembly is used for hoisting the prefabricated medium reaction boxes and arranging the prefabricated medium reaction boxes in each sash of each layer of frame unit one by one;

9. A media reaction chamber for a permeable reactive wall according to the method of any one of claims 1 to 7, comprising: