CN113186925B

CN113186925B - Visual high polymer grouting construction process for treating earth and rockfill dam leakage

Info

Publication number: CN113186925B
Application number: CN202110473574.0A
Authority: CN
Inventors: 王钰轲; 万永帅; 郭成超; 石明生; 曹天才; 韩沐森
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-04-05
Anticipated expiration: 2041-04-29
Also published as: CN113186925A

Abstract

The invention belongs to the technical field of seepage-proofing and leakage-proofing treatment of earth and rockfill dams. A visual high polymer grouting construction process for treating leakage of an earth and rockfill dam comprises detecting and determining the position of a leakage channel, determining the position of a drilling hole on the earth and rockfill dam according to the leakage channel, drilling, and finishing the arrangement of treatment point positions of the leakage channel; assembling a high polymer grouting device, placing the high polymer grouting device into a corresponding drill hole, determining the intersection position of the drill hole and a leakage channel through camera equipment in the high polymer grouting device, and accurately positioning a grouting point; adjusting the grouting position of a polymer grouting device in a corresponding drill hole, starting grouting, and monitoring the reaction condition of the polymer according to detection equipment in the polymer grouting device; and after the reaction of the high polymer reaches the set requirement, repeating the steps and performing grouting operation of the next drilling hole. The whole process can realize visual control, realizes monitoring of the grouting process, and improves the efficiency and quality of treating the earth-rock dam diseases.

Description

Visual high polymer grouting construction process for treating earth and rockfill dam leakage

Technical Field

The invention belongs to the technical field of seepage-proofing and leakage-resisting treatment of earth and rockfill dams, and particularly relates to a visual high polymer grouting construction process for treating leakage of an earth and rockfill dam.

Background

In the process of historical development of China's society, the construction of hydraulic engineering makes a contribution to economic construction and survival of Chinese nationalities. The earth-rock dam is an important component of the water conservancy project in China, and promotes the development of the water conservancy project in China. The earth-rock dam is a water retaining structure which is built by using local earth and rock materials and is made of local materials. The filling materials are easy to obtain, the material transportation cost is low, the construction technology is simple, the geological adaptability is good, the overall cost is low, the application is very wide at home and abroad, the flood control and water storage by utilizing the soil lift has been started in China thousands of years ago, and according to related data, the proportion of the earth-rock dam among dams built after the country is built reaches more than eighty percent. However, most earth and rockfill dams in China are built at the initial stage of the construction, due to the limitation of factors such as technology, experience and economy at that time, a plurality of potential safety hazards exist in the engineering construction process, the phenomena of incomplete design, poor foundation treatment, poor filling quality and the like are common, the phenomena of cracking and the like of the earth and rockfill dam bodies are easy to cause, and further the earth and rockfill dams are prone to leak. Data have shown that over one third of the earth and rockfill dams built at an early stage have a risk problem.

The high polymer grouting is a new technology which is mature in recent years, two-component high polymer materials are injected into a soil body or a structure, the two materials are mixed and react quickly, then the volume is expanded quickly, a foamy solid is formed, and the purposes of seepage prevention, reinforcement, lifting and the like can be achieved. The high polymer grouting material is a novel environment-friendly material for seepage-proofing reinforcement of infrastructure engineering, and has the characteristics of non-aqueous reaction, no toxicity, controllable reaction speed, quick solidification, high expansion, seepage resistance, good durability and the like. The construction method has the advantages of high construction speed, small damage to the structure, high engineering economic benefit and the like, is widely applied to the field of basic facilities such as highways, railways, pipelines, airport pavement, tunnels, dams, embankments and the like, and solves a large number of complicated engineering disasters. The high polymer flexible material has better impermeability and corrosion resistance, and the prior high polymer grouting technology is successfully applied to the treatment of seepage-proofing and leakage-stopping of earth-rockfill dams, and has obvious effect. In the current high polymer grouting construction process, the general position of the soil body and the geotechnical facility for void or leakage is determined by using related detection equipment, but the visualization and accurate positioning grouting in the high polymer grouting construction process cannot be realized. In the flood season, the leakage condition of most earth-rock dams is critical and is changeable instantly, and an efficient and quick high polymer grouting construction process is urgently needed to accurately and quickly position and treat the leakage.

Disclosure of Invention

The invention aims to solve the problems and the defects, and provides a visual high polymer grouting construction process for treating the leakage of the earth and rockfill dam.

In order to realize the purpose, the adopted technical scheme is as follows:

a visual high polymer grouting construction process for treating leakage of earth and rockfill dams comprises the following steps:

a. detecting and determining the position of a leakage channel, determining the position of a drilling hole on the earth-rock dam according to the leakage channel, drilling, and finishing the arrangement of treatment point positions of the leakage channel;

b. assembling a high polymer grouting device, placing the high polymer grouting device into a corresponding drill hole, determining the intersection position of the drill hole and a leakage channel through camera equipment in the high polymer grouting device, and accurately positioning a grouting point;

c. adjusting the grouting position of a polymer grouting device in a corresponding drill hole, starting grouting, and monitoring the reaction condition of the polymer according to detection equipment in the polymer grouting device;

d. and c, after the high polymer reaction meets the set requirement, repeating the steps b and c, and performing grouting operation of the next drilling hole.

According to the visual high polymer grouting construction process for treating the leakage of the earth-rock dam, preferably, in the step a, the position of a leakage channel is determined by an electric method, a transient electromagnetic method, a ground penetrating radar method or a sonar detection method; before drilling, determining the positions of an inlet and an outlet of a permeation channel, plugging the inlet of the permeation channel by a membrane bag grouting method, and arranging an auxiliary grouting pipe parallel to a membrane bag at the inlet of the permeation channel.

According to the visual polymer grouting construction process for treating the leakage of the earth-rock dam, preferably, in the step a, a seepage guide ditch is dug at the outlet of the seepage channel, the top end of the seepage guide ditch is 0.5-1.5 m higher than the water outlet of the seepage channel, the bottom end of the seepage guide ditch reaches the slope toe, and one or more of coarse sand, pebbles, broken bricks, broken stones, wickers and furnace slag are filled into the seepage guide ditch to serve as seepage guide materials.

According to the visual high polymer grouting construction process for treating leakage of earth and rockfill dams, the high polymer grouting device preferably comprises:

a guide tube;

the camera shooting equipment, the cleaning pipe and the grouting pipe are arranged in the guide pipe;

the bottom of the isolation sleeve is provided with a lower sealing plate, the isolation sleeve is sleeved on the lower part of the guide tube in a matching sliding manner, a transparent part corresponding to the camera equipment is arranged on the lower sealing plate, the lower sealing plate is also provided with a cleaning nozzle and a grouting head, the cleaning nozzle is arranged corresponding to the transparent part, the cleaning nozzle is communicated with the cleaning tube through a first connecting unit, and the grouting head is communicated with the grouting tube through a second connecting unit; and

the temperature detection probe and the pressure sensing sheet are distributed on the lower sealing plate;

the first connecting unit is used for connecting and separating the cleaning spray head and the cleaning pipe, and the second connecting unit is used for connecting and separating the grouting head and the grouting pipe.

According to the visual high polymer grouting construction process for treating the leakage of the earth and rockfill dam, preferably, the isolation sleeve and the guide pipe are of a close-fit splicing structure, a temperature probe wire and a sensing piece wire are arranged in the guide pipe, the lower ends of the temperature probe wire and the sensing piece wire are both provided with quick-connection plugs, quick-connection sockets corresponding to the corresponding quick-connection plugs are arranged on the temperature detection probe and the pressure sensing piece, and the isolation sleeve, the cleaning spray head, the grouting head, the temperature detection probe and the pressure sensing piece are all disposable products;

backflow prevention units are arranged between the cleaning spray head and the first connecting unit and between the grouting head and the second connecting unit; the camera equipment comprises a fixed seat arranged in the guide pipe, a camera and an infrared lamp, wherein the camera and the infrared lamp are arranged in the fixed seat and correspond to the transparent part;

the guide tubes are of a multi-section structure, and two adjacent sections of guide tubes are connected through threads; or a plurality of lengthened pipes are arranged at the upper part of the guide pipe, the lengthened pipes are connected with the guide pipe through threads, and two adjacent lengthened pipes are also connected through threads.

According to the visualized high polymer grouting construction process for treating the leakage of the earth-rock dam, preferably, in the step b, the assembly of the high polymer grouting device is completed, the guide pipe is put down, the inner wall of the drilled hole is observed through the camera equipment, the depth of the penetration channel is determined, and after the transparent part is stained, the transparent part is cleaned through the cleaning nozzle; when no permeation channel is found, the high polymer grouting device is taken out, and the drill hole is drilled further or points are taken at the periphery of the drill hole for further detection.

According to the visual polymer grouting construction process for treating the leakage of the earth-rock dam, preferably, in the step c, after a leakage channel intersected with the drilled hole is found, different component slurries of the polymer material are respectively conveyed to the grouting heads through the grouting pipes, the slurry enters the corresponding leakage channel through the grouting heads to undergo chemical reaction, the polymer material is gradually changed into a solid from liquid, and the solid is filled into the leakage channel, so that the purpose of blocking leakage water flow is achieved; after grouting is started, data of the disposable temperature detection probe and the disposable pressure sensing sheet are read, grouting is stopped when grouting pressure exceeds a set threshold, and a certain amount of high-pressure gas is introduced into a grouting pipe so as to completely discharge grout in the grouting pipe.

According to the visual high polymer grouting construction process for treating the leakage of the earth-rock dam, preferably, in the step d, the temperature change and the pressure change of the high polymer are monitored in real time, when the temperature of the slurry is reduced to a set value or the pressure reaches a set threshold value, the first connecting unit and the second connecting unit are disconnected, meanwhile, the temperature detection probe and the pressure sensing sheet are disconnected with the corresponding conducting wires, the guiding pipe is pulled out, the separation of the guiding pipe and the isolating pipe is realized, and the reusable parts of the high polymer grouting device are recovered.

According to the visualized high polymer grouting construction process for treating the leakage of the earth and rockfill dam, preferably, after the construction of each treatment point of the permeation channel is completed, the original appearance of the operation area of the original earth and rockfill dam is recovered.

By adopting the technical scheme, the beneficial effects are as follows:

firstly, the invention visually detects the environment in the soil body in real time by detecting the leakage channel and arranging the drill holes, is convenient to master the specific situation of the leakage channel, can realize secondary accurate positioning of the leakage channel of the earth and rockfill dam, improves the detection efficiency, can realize multipoint pointed repair treatment, greatly improves the repair effect, and provides a good and effective construction process for seepage-proofing and leakage-resisting construction of the construction engineering of the earth and rockfill dam;

the invention realizes the real-time monitoring of the slurry pressure and the reaction temperature in the high polymer grouting process, is convenient for the adjustment of the grouting process, and avoids the phenomenon that the leakage is aggravated because the excessive or too fast grouting generates too large internal pressure. According to the change of the monitored temperature and pressure, the treatment process can be accurately mastered, and the feasibility of the whole construction process is greatly improved;

the invention realizes the recovery of the main parts of the high polymer grouting device, has lower cost loss and lays a foundation for the popularization of the high polymer grouting device. After grouting, the spacer sleeve is stained with semi-cured high polymer grout or is completely fixed in the cured high polymer, at the moment, the pulling grouting pipe is connected with the drawn wire of the buckle, the grouting pipe and the buckle fall off (firstly, high-pressure gas is introduced into the grouting pipe to completely discharge the high polymer grout), then the cleaning pipe is pulled, and the cleaning pipe and the top end of the disposable backflow prevention unit fall off at the sleeving position. The temperature sensing probe and the pressure sensing sheet are pulled to lead the wires of the temperature sensing probe and the pressure sensing sheet to fall off, thus realizing repeated application of main equipment except disposable articles.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting the invention to all embodiments thereof.

Fig. 1 is a schematic top view of a polymer grouting apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view along the direction a-a in fig. 1.

Fig. 3 is a schematic sectional view along the direction B-B in fig. 1.

Fig. 4 is a schematic top view of a spacer according to an embodiment of the present invention.

Fig. 5 is a schematic sectional view along direction C-C in fig. 4.

Fig. 6 is a schematic sectional view along direction D-D in fig. 4.

Fig. 7 is a schematic structural diagram of a first connection unit according to an embodiment of the invention.

Fig. 8 is a schematic view of a connection structure of a temperature detection probe and a temperature probe wire according to an embodiment of the present invention.

Fig. 9 is a second schematic structural diagram of the first connection unit according to the embodiment of the invention.

Fig. 10 is a schematic diagram of the arrangement of the leakage passage and the polymer grouting device on the earth and rockfill dam according to the embodiment of the present invention.

Number in the figure:

100 is a guide tube;

110 is a camera device, 111 is a fixed seat, 112 is a camera, 113 is an infrared lamp, 120 is a cleaning tube, 130 is a grouting tube, 140 is a temperature probe wire, 141 is a quick-connection plug, and 150 is an induction sheet wire;

200 is an isolation sleeve, 210 is a cleaning spray head, 220 is a grouting head, 221 is a grouting hole, 230 is a temperature detection probe, 231 is a quick-connection socket, 232 is a temperature probe wire perforation, 240 is a pressure sensing sheet, and 241 is a sensing sheet wire perforation;

301 is a first clamping sleeve, 302 is a second clamping sleeve, 303 is a clamping pull rope, 304 is an annular clamping groove, 305 is an eccentric clamping block, 306 is a ball and 307 is a driving ring;

400 is a backflow preventing unit;

501 is earth and rockfill dam, 502 is leakage inlet, 503 is leakage outlet, 504 is leakage channel, 505 is drilling hole, 506 is grouting machine and cleaning machine integrated equipment, 507 is data receiving equipment, 508 is high polymer grouting device, 509 is membrane bag, 510 is guiding leakage ditch.

Detailed Description

Illustrative aspects of embodiments of the invention are described more fully hereinafter with reference to the accompanying drawings, in which specific embodiments of the invention are shown. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art.

In the description of the present invention, it should be understood that the terms "first" and "second" are used to describe various elements of the invention, and are not intended to limit any order, quantity, or importance, but rather are used to distinguish one element from another.

It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that intervening elements may be present therebetween; i.e., positional relationships encompassing both direct and indirect connections.

It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

It should be noted that terms indicating orientation or positional relationship such as "upper", "lower", "left", "right", and the like, are used only for indicating relative positional relationship, which is for convenience in describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operated in a specific orientation; when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly.

Referring to fig. 1-10, the application discloses a visual high polymer grouting construction process for treating earth and rockfill dam leakage, comprising:

In the step a, determining the position of a leakage channel by an electrical method, a transient electromagnetic method, a ground penetrating radar method or a sonar detection method; before drilling, determining the positions of an inlet and an outlet of a permeation channel, and plugging the inlet of the permeation channel by a membrane bag grouting method, wherein the specific operation method comprises the following steps: the inlet of the leakage channel is plugged by using a membrane bag grouting method, the bundled membrane bag and a grouting pipe are placed into the leakage inlet, and the membrane bag is firstly grouted to expand and block seepage; the further plugging of the permeation channel at the inlet can be realized by grouting at the inlet, so that an auxiliary grouting pipe parallel to the membrane bag is arranged at the inlet of the permeation channel, and the grouting through the auxiliary grouting pipe can be independently constructed and can also be synchronously constructed with the subsequent grouting of high polymers.

When drilling operation is carried out, a drilling machine is adopted to drill holes through the movable platform, and the hole diameter is about 3.6 cm. The method is characterized in that drilling holes are arranged according to the detection position of the earth-rock dam leakage channel in advance, the depth value of the drilling hole is a large value, the depth value is larger than the depth value of the leakage channel in probability, namely the depth of a leakage outlet, and the depth of the drilling hole can be preliminarily determined according to the inlet height and the outlet height of the leakage channel.

Further, in the step a, a seepage guiding groove is dug at the outlet of the seepage channel, the top end of the seepage guiding groove is 0.5-1.5 m higher than the water outlet of the seepage channel, the bottom end of the seepage guiding groove reaches the slope toe, and one or more of coarse sand, pebbles, broken bricks, broken stones, wickers and furnace slag are filled into the seepage guiding groove to serve as seepage guiding materials. Preferably, the top end of the seepage guiding groove in the application is 1m higher than the water outlet of the seepage channel, and the bottom end of the seepage guiding groove reaches the toe of the slope. The width of the ditch is 0.5-0.8m, the depth of the ditch is 0.8-1m, and coarse sand, pebbles, broken bricks or broken stones are filled into the infiltration guiding ditch layer by layer. Each layer having a thickness of about 0.2-0.3 m. Alternatively, wicker and slag can be used as the permeability-guiding material.

Referring to fig. 1 to 9, the visual polymer grouting device in the present application includes a guide tube 100, a camera device 110, a cleaning tube 120, a grouting tube 130, and an isolation sleeve 200 arranged in the guide tube 100, wherein a lower sealing plate is arranged at the bottom of the isolation sleeve 200, the isolation sleeve 200 is slidably sleeved on the lower portion of the guide tube 100 in a matching manner, a transparent portion corresponding to the camera device is arranged on the lower sealing plate, a cleaning nozzle 210 and a grouting head 220 are further arranged on the lower sealing plate, the cleaning nozzle 210 is arranged corresponding to the transparent portion, when the transparent portion is covered by dust, a cleaning liquid is sprayed out through the cleaning nozzle to clean the transparent portion, the cleaning nozzle 210 is communicated with the cleaning tube 120 through a first connection unit, and the grouting head 220 is communicated with the grouting tube 130 through a second connection unit; the first connection unit is used to connect and separate the cleaning nozzle 210 and the cleaning pipe 120, and the second connection unit is used to connect and separate the grouting head 220 and the grouting pipe 130.

Camera equipment in this application is including setting up fixing base 111 in the guide tube, laying camera 112 and infrared lamp 113 in the fixing base, camera 112 with infrared lamp 113 all with transparent portion corresponds the setting. Preferably, the isolation sleeve 200 and the guide tube 100 in this embodiment are in a close-fitting insertion structure. The tight-fit insertion structure in this embodiment means that the guide tube 100 and the spacer sleeve 200 are slidably sleeved with each other, and the friction force between abutting surfaces of the guide tube 100 and the spacer sleeve 200 is greater than the weight of the spacer sleeve 200, so that the spacer sleeve 200 cannot fall off from the guide tube 100, and after the spacer sleeve 200 is bonded with the castable, the guide tube 100 is lifted upwards, and at this time, the guide tube 100 can be easily separated from the spacer sleeve 200. Similar to the grafting between the comparatively common cell-phone among the existing equipment and the data line, mainly with the help of interference fit, realize can realizing relatively fixed after pegging graft between guide tube and the separation sleeve, the separation sleeve plays the guard action to the inside instrument and equipment of guide tube, gets into the guide tube or glues the guide tube when avoiding the high polymer to pour.

The isolation sleeve and the lower sealing plate are made of the same material and can be of an integral structure made of transparent plastic materials, so that the transparent part does not need to be processed and arranged independently; other materials can be selected according to the performance requirements of the isolation sleeve and the lower sealing plate, at the moment, the transparent part is made of transparent glass or plastic and is embedded in the lower sealing plate of the isolation sleeve in a matching mode, the lower sealing plate of the temperature detection probe 230 and the pressure sensing piece 240 are further arranged on the lower sealing plate, the temperature probe lead 140 and the sensing piece lead 150 are arranged in the guide tube 100, the lower ends of the temperature probe lead 140 and the sensing piece lead 150 are respectively provided with a quick-connection plug 141, the temperature detection probe 230 and the pressure sensing piece 240 are respectively provided with a quick-connection socket 231 corresponding to the corresponding quick-connection plug 141, and the connection mode can be the plug-socket connection mode or the data line port plug-in connection mode.

In specific practical application, the temperature sensing probe can be fixed outside the isolation sleeve through glue, and data of the temperature sensing probe is connected with reading equipment through a lead, so that the real-time reaction temperature in the reaction process of the high polymer slurry can be monitored. The pressure-sensitive piece can be pasted outside the isolation sleeve through glue, and the data of the pressure-sensitive piece is connected with reading equipment through a lead, so that the real-time pressure of the reaction of the high polymer slurry can be monitored.

The utility model provides an isolation sleeve, washing shower nozzle, slip casting head, temperature detect probe and forced induction piece are disposable product, do not retrieve, wait to water and accomplish the back, and it is kept somewhere in drilling, has the effect of shutoff on the one hand, and on the other hand also is convenient for stabilize the inner structure performance, can also improve the efficiency and the convenience of construction, more helps the application of high polymer in the anti hourglass of prevention of seepage.

For the structure of the first connection unit and the second connection unit, it can take many different forms, form one: the first connecting unit and the second connecting unit comprise a first connecting sleeve and a second connecting sleeve, and the first connecting sleeve is arranged at the inner end part of the corresponding cleaning spray head or grouting head; the second adapter sleeve sets up the tip at the scavenge pipe or the slip casting pipe that correspond, first adapter sleeve passes through the grafting structural connection of tight fit with second adapter sleeve, it also adopts the structural style of pegging graft, so that separation between the two after the slip casting is accomplished, in order to avoid the slip casting in-process two because slip casting pressure leads to unexpected separation, can pass through support piece support with first adapter sleeve and separation sleeve and fix, pass through support piece support with second adapter sleeve and guide tube and fix, first adapter sleeve and second adapter sleeve formed the grafting of rigid structure spare this moment, it is better to peg graft back stability.

The second form: the first connection unit and the second connection unit in this embodiment each include a first clamping sleeve 301, a second clamping sleeve 302, and a clamping pull rope 303, the first clamping sleeve 301 is disposed at an inner end of the corresponding cleaning nozzle 210 or grouting head 220, and the first clamping sleeve 301 is provided with an annular clamping groove 304 having an arc-shaped cross section; the second clamping sleeve 302 is arranged at the end of the corresponding cleaning tube 120 or grouting tube 130, the first clamping sleeve 301 is inserted into the second clamping sleeve 302 in a matching manner, at least two eccentric clamping blocks 305 are hinged to the second clamping sleeve 302, and the eccentric clamping blocks 305 correspond to the annular clamping grooves 304; the latch pull rope 303 is connected to the cam block 305, and the latch pull rope 303 drives the cam block 305 to rotate. Through eccentric fixture block and ring groove's effect, realize being connected between first joint sleeve pipe and the second joint sleeve pipe, guarantee slip casting pipe and slip casting head, scavenge pipe and wash the stable intercommunication between the shower nozzle, can realize the separation through the buckle stay cord simultaneously to be convenient for retrieve the repetition of guide tube and inner structure spare, it is more convenient to operate.

The third form: a buckle joint structure similar to that of a washing machine can be adopted, as shown in fig. 7, the action mode of the buckle joint structure is basically consistent with that of the second form, and the difference is only that an eccentric clamping block is replaced by a ball 306, a driving ring 307 and a spring are further arranged on the second clamping sleeve, the inner wall surface of the driving ring corresponding to the ball is of a conical surface structure, so that the ball can be tightly pushed and loosened when the driving ring acts, the ball is matched with an annular clamping groove, the structure is clamped, the driving ring 307 is driven by the spring to tightly push the ball 306, and the ball is correspondingly clamped with the annular clamping groove of the first clamping sleeve; when the separation is needed, the drive ring is pulled through the buckle pull rope to overcome the action of the spring, so that the balls are not stressed by the pressure of the drive ring any more, and then the balls are separated from the annular clamping groove, and the separation is realized.

Other structural forms in the prior art can also be adopted for the structures of the first connecting unit and the second connecting unit, such as a quick connector controlled electrically, and the modes of separating and clamping the corresponding clamping structure through an electromagnetic effect can be realized.

In order to avoid backflow, the backflow prevention unit 400 is arranged between the cleaning nozzle 210 and the first connecting unit and between the grouting head 220 and the second connecting unit, the backflow prevention unit can be a one-way valve, the backflow prevention unit is connected with the corresponding grouting head and the cleaning nozzle and is kept in a drill hole as a disposable product, and the expansion overflow after high polymer grouting is avoided.

The device is further provided with a plurality of lengthened pipes, the lengthened pipes are in threaded connection with the guide pipe, and the two adjacent lengthened pipes are also in threaded connection. The lengthening pipe and the guide pipe can be completely the same, namely, the lengthening pipe and the guide pipe are hollow metal pipes, the length and the size can be the same, the lengthening pipe and the guide pipe can also be divided into different specification lengths, two adjacent pipes are lengthened through threaded connection, and the lengthening pipe and the guide pipe are more convenient to be suitable for construction operation of drilling holes with different depths.

In the construction process, the environment inside the soil body is visually detected in real time through a preset drill hole, so that the leakage channel can be accurately secondarily positioned; the temperature sensing probe and the pressure sensing sheet can monitor the temperature and pressure change conditions in the reaction process of the high polymer slurry in real time, and accurately master the leakage treatment process; after grouting, the plastic shell is stained with semi-cured high polymer slurry or completely fixed in the cured high polymer, at the moment, the grouting pipe is pulled to connect with the drawing wire of the buckle, the grouting pipe and the buckle fall off (high-pressure gas is introduced into the grouting pipe to completely discharge the high polymer slurry), then the cleaning liquid guide pipe is pulled, and the cleaning liquid guide pipe and the top end of the disposable backflow prevention device fall off at the sleeving position. The temperature sensing probe and the pressure sensing sheet are pulled to lead the wires of the temperature sensing probe and the pressure sensing sheet to fall off, thus realizing repeated application of main equipment except disposable articles.

Based on the above structural design, in step b of this application, finishing the equipment of high polymer slip casting device, concrete step is:

(1) sleeving a disposable isolation sleeve (adopting a transparent plastic shell) at the bottom of a guide tube (adopting a metal tube), installing an infrared camera, a disposable temperature detection probe and a disposable pressure sensing sheet, connecting a lead, and connecting the lead with data receiving equipment;

(2) the disposable backflow prevention unit (namely, a one-way valve which can be independently installed or can be of a modular structure integrally formed with the grouting head and is integrally installed and more convenient) is connected to the grouting head of the disposable isolation sleeve, and the connection between the grouting pipe and the grouting head is realized through the first connection unit;

(3) the position of a cleaning spray head on the disposable isolation sleeve is connected with a disposable backflow prevention unit and is connected with a cleaning pipe through a second connection unit;

(4) connecting the extension pipe with the guide tube, vertically and slowly lowering along the drill hole, simultaneously acquiring data through camera equipment, observing the condition inside the drill hole by imaging equipment, if the bottom transparent plastic shell is contaminated by sludge, cleaning liquid which is communicated with a certain pressure through a cleaning liquid nozzle is cleaned through a cleaning liquid pipe connector, so as to ensure the imaging quality of the night vision camera, if a leakage channel which is intersected with the drill hole is found in the descending process, grouting is started, if the probe descends to the bottom, the channel is not found, then the detection is required to be carried out again through the cloth hole on the periphery of the original hole, or the original drill hole is further drilled, and the detection is carried out again.

In the step c, after a leakage channel intersected with the drill hole is found, different component slurries of the high polymer material are respectively conveyed to the grouting heads through the grouting pipes, and enter the corresponding leakage channel through the grouting heads to generate chemical reaction, so that the high polymer material is gradually changed into a solid from liquid and is filled into the leakage channel, and the purpose of plugging leakage water flow is achieved; after grouting is started, data of the disposable temperature detection probe and the disposable pressure sensing sheet are read, grouting is stopped when grouting pressure exceeds a set threshold, and a certain amount of high-pressure gas is introduced into a grouting pipe so as to completely discharge grout in the grouting pipe.

And d, monitoring the temperature change and the pressure change of the high polymer in real time, disconnecting the first connecting unit and the second connecting unit when the temperature of the slurry is reduced to a set value or the pressure reaches a set threshold value, disconnecting the temperature detection probe and the pressure sensing sheet from corresponding conducting wires, pulling out the guide tube, separating the guide tube from the isolating tube, and recovering the reusable components of the high polymer grouting device.

The following further description is made for the specific implementation of the above-described grouting and detection steps: the high polymer is generally A, B two kinds of slurry, the high polymer material A, B two-component slurry is respectively conveyed to a grouting head through a grouting pipe, the two kinds of slurry are conveyed to a leakage channel at the grouting head and generate chemical reaction, the material is gradually changed into solid from liquid and is filled into the leakage channel, and the purpose of blocking leakage water flow is achieved. And after grouting is started, opening the reading equipment of the disposable temperature detection probe and the disposable pressure sensing sheet, stopping grouting when the grouting pressure exceeds a certain specific value, and introducing a certain amount of high-pressure gas into the grouting pipe so as to completely discharge the grout in the grouting pipe. And then monitoring the temperature change and the pressure change of the high polymer slurry in real time, and taking out other main equipment except the disposable part when the temperature of the slurry is reduced to a certain given value or the pressure reaches a certain threshold value. The concrete mode is as follows: at the moment, the plastic shell is fixedly connected with the high polymer slurry, the buckle is pulled to pull the grouting pipe to fall off from the grouting head, the cleaning pipe, the temperature probe wire and the pressure sensing piece wire are pulled to fall off from the disposable part, then the extension rod is taken out, and the disposable plastic shell and other disposable parts fixed on the disposable plastic shell are left in the drilled hole.

And after the treatment of the construction area is finished, observing the leakage treatment condition, if a new leakage point appears near the leakage treatment channel, drilling, and then supplementing grouting liquid until no obvious leakage exists.

After the construction of each treatment point of the permeation channel is completed, the original appearance of the operation area of the original earth-rock dam is restored, and then the next treatment is developed.

While the preferred embodiments for carrying out the invention have been described in detail, it should be understood that they have been presented by way of example only, and not limitation as to the scope, applicability, or configuration of the invention in any way. The scope of the invention is defined by the appended claims and equivalents thereof. Many modifications may be made to the foregoing embodiments by those skilled in the art, which modifications are within the scope of the present invention.

Claims

1. A visual high polymer grouting construction process for treating earth and rockfill dam leakage is characterized by comprising the following steps:

d. after the reaction of the high polymer reaches the set requirement, repeating the steps b and c, and performing grouting operation of the next drilling hole;

the high polymer grouting device comprises:

a guide tube;

2. The visual polymer grouting construction process for treating the leakage of the earth and rockfill dam according to claim 1, wherein in step a, the position of a leakage channel is determined by an electrical method, a transient electromagnetic method, a ground penetrating radar method or a sonar detection method; before drilling, determining the positions of an inlet and an outlet of a permeation channel, plugging the inlet of the permeation channel by a membrane bag grouting method, and arranging an auxiliary grouting pipe parallel to a membrane bag at the inlet of the permeation channel.

3. The visual polymer grouting construction process for treating earth and rockfill dam leakage according to claim 2, wherein in step a, a seepage guiding trench is dug at the outlet of the seepage passage, the top end of the seepage guiding trench is 0.5-1.5 m higher than the water outlet of the seepage passage, the bottom end of the seepage guiding trench reaches the slope toe, and one or more of coarse sand, pebbles, broken bricks, broken stones, wickers and furnace slag are filled in the seepage guiding trench as seepage guiding materials.

4. The visual polymer grouting construction process for treating earth and rockfill dam leakage according to claim 1, wherein the isolation sleeve and the guide pipe are of a close-fitting plugging structure, a temperature probe wire and a sensing piece wire are arranged in the guide pipe, the lower ends of the temperature probe wire and the sensing piece wire are both provided with quick-connection plugs, the temperature detection probe and the pressure sensing piece are provided with quick-connection sockets corresponding to the corresponding quick-connection plugs, and the isolation sleeve, the cleaning nozzle, the grouting head, the temperature detection probe and the pressure sensing piece are all disposable products;

5. The visual polymer grouting construction process for treating earth and rockfill dam leakage according to claim 1 or 4, wherein in step b, the assembly of the polymer grouting device is completed, the guide pipe is put down, the inner wall of the drilled hole is observed through the camera to determine the depth of the penetration channel, and after the transparent part is contaminated, the transparent part is cleaned through the cleaning nozzle; when no permeation channel is found, the high polymer grouting device is taken out, and the drill hole is drilled further or points are taken at the periphery of the drill hole for further detection.

6. The visual polymer grouting construction process for treating earth and rockfill dam leakage according to claim 1 or 4, wherein in step c, after a leakage channel intersecting with the drilled hole is found, different component slurries of the polymer material are respectively conveyed to grouting heads through grouting pipes, enter the corresponding leakage channel through the grouting heads to undergo chemical reaction, the polymer material gradually changes from liquid to solid and is filled into the leakage channel, so as to achieve the purpose of blocking leakage water flow; after grouting is started, data of the disposable temperature detection probe and the disposable pressure sensing sheet are read, grouting is stopped when grouting pressure exceeds a set threshold, and a certain amount of high-pressure gas is introduced into a grouting pipe so as to completely discharge grout in the grouting pipe.

7. The visual polymer grouting construction process for treating earth and rockfill dam leakage according to claim 6, wherein in step d, the temperature change and pressure change of the polymer are monitored in real time, when the temperature of the grout is reduced to a set value or the pressure reaches a set threshold, the first connecting unit and the second connecting unit are disconnected, meanwhile, the temperature detecting probe and the pressure sensing sheet are disconnected from the corresponding conducting wires, the guide pipe is pulled out, the separation of the guide pipe and the isolation pipe is realized, and the reusable components of the polymer grouting device are recovered.

8. The visual polymer grouting construction process for treating earth and rockfill dam leakage according to claim 1, wherein the original appearance of the working area of the original earth and rockfill dam is restored after the construction of each treatment point of the penetration channel is completed.