CN112917660A - Efficient anti-blocking backflow grouting pipe and method - Google Patents
Efficient anti-blocking backflow grouting pipe and method Download PDFInfo
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- CN112917660A CN112917660A CN202110111253.6A CN202110111253A CN112917660A CN 112917660 A CN112917660 A CN 112917660A CN 202110111253 A CN202110111253 A CN 202110111253A CN 112917660 A CN112917660 A CN 112917660A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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Abstract
The invention discloses a high-efficiency anti-blocking backflow grouting pipe, wherein a pipe body is formed by splicing and assembling a plurality of pipe joints; the pipe joint comprises an upper end joint, a lower end joint and a grouting joint from top to bottom in sequence, and a plurality of middle joints are connected between the upper end joint and the lower end joint. The using method comprises the following steps: connecting the grouting joint with the lower end joint by utilizing the matching between the splicing joint containing the outer threads and the splicing joint containing the inner threads, starting a drill bit to drill, and synchronously increasing the middle joint according to the drilling depth; grouting into the main pipeline, wherein after the grout reaches a certain pressure, the pressure-resistant rubber sleeve is opened, and the grout flows out from the grout outlet and reaches a grouting area; when grouting reaches a preset effect or is waiting for coagulation, cleaning water is pumped into the main pipeline, water flow can enter the grouting section along the main pipeline and flow out of the backflow water outlet from the upper end section under the action of pressure. The invention has simple structure and convenient operation, can solve the problems of slurry leakage, sedimentation, segregation and the like in the grouting of the existing grouting pipe, and greatly improves the grouting efficiency.
Description
Technical Field
The invention relates to a grouting pipe and a method, in particular to a high-efficiency anti-blocking backflow grouting pipe and a method.
Background
Grouting, ceramic process grouting and building engineering grouting. The ceramic process grouting is a process for applying prepared mud grouting to ceramic production. The construction engineering is a method of injecting some curable slurry into cracks or pores of the geotechnical ground by proper method, and improving the physical and mechanical properties by means of replacement, filling, extrusion and the like. However, the phenomena of easy running, sedimentation, segregation and the like of slurry exist in the grouting of the water-containing loose sand body or the broken rock body, so that the problems of low grouting efficiency, shallow grouting depth, low grouting pressure and the like are caused.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a high-efficiency anti-blocking backflow grouting pipe and a method.
In order to solve the technical problems, the invention adopts the technical scheme that: a high-efficiency anti-blocking backflow grouting pipe is characterized in that a pipe body is formed by splicing and assembling a plurality of pipe joints; the pipe joint sequentially comprises an upper end joint, a lower end joint and a grouting joint from top to bottom;
the main pipeline of the upper end section is communicated with the main pipeline of the lower end section, and the auxiliary pipeline of the upper end section is communicated with the auxiliary pipeline of the lower end section; the top of the auxiliary pipeline in the upper end section is provided with a backflow water outlet communicated with the outside of the pipe body; the bottom of the auxiliary pipeline in the lower end section is provided with a slurry return port;
the grouting joint is the last joint of the pipe body, a grouting inner pipe communicated with the main pipeline is arranged inside the grouting joint, the diameter of the grouting inner pipe is smaller than that of the grouting joint, a gap is formed between the grouting inner pipe and the inner wall of the grouting joint to form a grout flowing space, the bottom of the grouting inner pipe is opened, the bottom end of the grouting inner pipe is suspended in the grouting joint, the grouting inner pipe is communicated with the grout flowing space, and therefore grout is guaranteed to be in a flowing state all the time; the slurry flowing space at the upper part of the grouting pipe is provided with an opening matched with the slurry return port, so that the slurry flowing space is communicated with the auxiliary pipeline through the slurry return port;
a plurality of slurry outlets are formed in the surface of the grouting section, the slurry outlets are communicated with the slurry flowing space, and the slurry outlets are wrapped by pressure-resistant rubber sleeves; the lower end of the grouting joint is provided with an automatic drill bit.
Furthermore, the top end and the bottom end of the upper end section are both provided with an outer-wire-containing splicing port which protrudes outwards, and the outer-wire-containing splicing port at the top end of the upper end section is used for being in threaded connection with a grouting pump; the top end of the lower end section is provided with an inwards concave splicing port containing internal threads, and the splicing port containing the internal threads is matched with the splicing port containing the external threads; the bottom end of the lower end section is provided with an outer thread splicing port; the top end of the grouting section is provided with an inner-thread-containing splicing port, and the grouting section is fixed with the lower end section in a manner of spirally splicing the inner thread and the outer thread.
Furthermore, the pipe joint also comprises one or more middle joints, a main pipeline and an auxiliary pipeline are arranged in each middle joint and are the same as the upper end joint, and the main pipeline and the auxiliary pipeline are communicated up and down; the top end of the middle section is provided with an internal thread splicing port for spirally splicing with the upper end section; the bottom end of the middle section is provided with an outer-containing screw splicing port for spirally splicing with the lower end section.
Furthermore, the top end of the auxiliary pipeline of the upper end section is sealed through a first valve, a backflow water outlet is formed in the side wall of the auxiliary pipeline on the lower side of the sealed end, and a second valve is arranged at the backflow water outlet.
Further, the bottom end of the lower end section auxiliary pipeline is closed, so that the auxiliary pipeline is isolated from the main pipeline communicated with the splicing port containing the external threads, and the slurry return port is positioned on the side wall above the closed end; the internal thread-containing splicing opening of the grouting joint is positioned inside the grouting joint and fixedly connected above the grouting inner pipe, so that the internal thread-containing splicing opening is communicated with the grouting inner pipe.
A use method of a high-efficiency anti-blocking backflow grouting pipe comprises the following steps:
connecting a grouting joint with a lower end joint by utilizing the matching between an outer-containing splicing joint and an inner-containing splicing joint, and installing a sealing ring at the splicing joint; the drill bit is started to drill, the middle sections are synchronously increased according to the drilling depth, the more the middle sections are installed, the longer the length of the pipe body is, and the deeper the drilling depth is; when the grouting section reaches the grouting area, connecting the upper end section;
step two, after the installation is finished, the main pipeline in the upper end section can extend downwards, sequentially penetrates through the middle section and the lower end section to reach the grouting section, and is communicated with the grouting inner pipe in the grouting section, a grout flowing space is surrounded outside the grouting inner pipe, the grout flowing space is communicated with the auxiliary pipeline through a grout backflow port between the lower end section and the grouting section, and extends upwards, sequentially penetrates through the lower end section and the middle section to reach the upper end section and is communicated with a backflow water outlet of the upper end section;
thirdly, grouting, connecting a grouting pump at the upper end of the upper end section, opening a first valve, closing a second valve, and grouting into the main pipeline and the auxiliary pipeline through the grouting pump or grouting into the main pipeline only; at the moment, the flow processes of the slurry in the main pipeline are as follows: the grout sequentially passes through the upper end section, the middle section and the lower end section and finally enters the grouting section; in the grouting section, the grout firstly enters the grouting inner pipe along the main pipeline and descends along the grouting inner pipe, and the bottom of the grouting inner pipe is suspended, so that the grout can pass through the grouting inner pipe and fall into a grout flowing space, thereby ensuring that the grout is always in a flowing state, and under the action of pressure, the grout rises in the grout flowing space and reaches a grout outlet; the slurry in the auxiliary pipeline enters the slurry flowing space through the slurry return port along the auxiliary pipeline and reaches the slurry outlet;
step four, the pressure-resistant rubber sleeve at the grout outlet is made into rubber sleeves with different pressure-resistant grades according to the pressure used in grouting, when grouting is carried out and the pressure provided by a grouting pump is higher than the pressure of the pressure-resistant rubber sleeve, the pressure-resistant rubber sleeve is opened, and grout can be injected into the stratum through the grout outlet to realize grouting;
step five, stopping grouting, cleaning the interior of the pipeline when the grouting reaches a preset effect or the grout waits for setting, closing a first valve, pumping water into the main pipeline through a grouting pump, directly feeding water flow into a grouting section along the main pipeline, and can penetrate through the grouting inner pipe to enter a slurry flowing space, the pressure provided by the grouting pump is less than or equal to the pressure of the pressure-resistant rubber sleeve, water flow cannot flow out of the pressure-resistant rubber sleeve, so that a relatively sealed space is formed in the grouting section, and water flow can enter the auxiliary pipeline along the slurry backflow port and further go upwards to the upper end section under the action of pressure, and the second valve on the backflow water outlet is opened, so that the water flow flows out from the backflow water outlet, the grouting pipe is cleaned without dead angle, the grouting pipe blockage phenomenon caused by slurry segregation and precipitation when slurry is waiting for setting is effectively prevented, and the smooth proceeding of subsequent grouting is ensured.
The invention has the advantages that: (1) the design of the suspended grouting inner pipe in the grouting section can enable the grout to be in a flowing state in the grout flowing space all the time, so that the problem of blockage of the grouting pipe caused by segregation and precipitation of the grout during waiting for setting is effectively solved; (2) the design of the main pipe and the auxiliary pipe can realize the backflow of liquid in the pipes, realize no lifting of the grouting pipes and no dead angle cleaning, ensure the smooth proceeding of subsequent grouting and improve the grouting efficiency; (3) the grouting pipes are designed in a segmented splicing manner, so that grouting of grouting holes at different depths can be realized, and convenience and rapidness are realized; (4) the drill bit is equipped with to the bottom, can realize the while drilling and annotate, and the full pipe adopts full steel nature material, can satisfy the requirement of high-pressure slip casting. The invention has simple structure and convenient operation, can solve the problems of slurry leakage, sedimentation, segregation and the like in the grouting of the existing grouting pipe, greatly improves the grouting efficiency, and is more popular in the practical engineering application.
Drawings
Fig. 1 is a schematic structural view of an upper end section.
Fig. 2 is a schematic structural view of the lower end section.
Fig. 3 is a schematic structural diagram of a grouting joint.
Fig. 4 is a schematic structural view of the intermediate link.
FIG. 5 is a schematic view of the present invention in use.
In the figure: 1. an upper end section; 2. a lower end section; 3. grouting joints; 4. a main pipeline; 5. a secondary pipe; 6. a return water outlet; 7. a slurry return port; 8. grouting an inner pipe; 9. a slurry flow space; 10. a pulp outlet; 11. a pressure-resistant rubber sleeve; 12. an automatic drill bit; 13. the outer thread splicing port is included; 14. an internal thread splicing port is included; 15. a middle section; 16. a second valve; 17. a loose sand layer; 18. a first valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the high-efficiency anti-blocking backflow grouting pipe has a pipe body formed by splicing and assembling a plurality of pipe joints; the pipe joint comprises an upper end joint 1, one or more middle joints 15, a lower end joint 2 and a grouting joint 3 from top to bottom in sequence;
as shown in fig. 1 and 2, a main pipeline 4 and an auxiliary pipeline 5 are arranged in the upper end section and the lower end section, the auxiliary pipeline is arranged beside the main pipeline, the main pipeline and the auxiliary pipeline are not communicated with each other, the main pipeline of the upper end section is communicated with the main pipeline of the lower end section, and the auxiliary pipeline of the upper end section is communicated with the auxiliary pipeline of the lower end section; the top of the auxiliary pipeline in the upper end section is provided with a backflow water outlet 6 communicated with the outside of the pipe body; the bottom of the auxiliary pipeline in the lower end section is provided with a slurry return opening 7.
The main pipeline only allows the grout to enter in a single direction, is a main channel for injecting the grout during grouting and is also the only channel for water flow to enter the pipeline during cleaning. When grouting is finished and the pipeline is cleaned, the auxiliary pipeline is used as a slurry discharge channel, and sewage in the pipeline is discharged into the ground wastewater collection device through the pipeline, so that the grouting pipeline is cleaned without lifting a grouting pipe and dead angles.
As shown in fig. 3, the grouting section is the last section of the pipe body, a grouting inner pipe 8 communicated with the main pipe is arranged inside the grouting section, the diameter of the grouting inner pipe is smaller than that of the grouting section, so that a slurry flowing space 9 is formed between the grouting inner pipe and the inner wall of the grouting section at intervals, the bottom of the grouting inner pipe is open, the bottom end of the grouting inner pipe is suspended in the grouting section, the grouting inner pipe is communicated with the slurry flowing space, and thus slurry is ensured to be in a flowing state all the time; the slurry flowing space at the upper part of the grouting pipe is provided with an opening matched with the slurry return port, so that the slurry flowing space is communicated with the auxiliary pipeline through the slurry return port;
a plurality of slurry outlets 10 are formed in the surface of the grouting section, the slurry outlets are communicated with the slurry flowing space, and the slurry outlets are wrapped by pressure-resistant rubber sleeves 11; the lower end of the grouting section is provided with an automatic drill bit 12, so that grouting in the drilling process can be realized, and the drill bit can drill from different angles, such as vertical or parallel, according to different grouting processes, so that grouting at different angles, such as vertical grouting or parallel grouting, can be realized. Each pipe joint is made of rigid materials, high-pressure grouting can be performed, and the assembly is simple.
The top end and the bottom end of the upper end section are both provided with an outer-thread-containing splicing port 13 which protrudes outwards, and the outer-thread-containing splicing port at the top end of the upper end section is used for being spirally connected with a grouting pump; the top end of the lower end section is provided with an inwards concave splicing port 14 containing internal threads, and the splicing port containing the internal threads is matched with the splicing port containing the external threads; the bottom end of the lower end section is provided with an outer thread splicing port; the top of slip casting festival is provided with and contains interior silk concatenation mouth, and the slip casting festival is fixed mutually with lower extreme festival through the mode of interior silk spiral concatenation to set up the sealing washer at the kneck.
As shown in fig. 4, the pipe joint further comprises one or more middle joints 15, the number of the middle joints is one or more according to the actual grouting depth, a main pipe 4 and an auxiliary pipe 5 are arranged in each middle joint and are the same as those of the upper end joint, and the main pipe and the auxiliary pipe are communicated up and down; the top end of the middle section is provided with an internal thread splicing port 14 for spirally splicing with the upper end section; the bottom end of the middle section is provided with an outer-containing screw splicing port for spirally splicing with the lower end section. And sealing is realized at each interface connection part through a sealing ring.
The top end of the upper end section auxiliary pipeline is sealed through a first valve 18, a backflow water outlet 6 is formed in the side wall of the auxiliary pipeline on the lower side of the sealed end, and a second valve 16 is arranged at the backflow water outlet.
The bottom end of the lower end section auxiliary pipeline is closed, so that the auxiliary pipeline is isolated from a main pipeline communicated with a splicing port containing external threads, and the slurry return port 7 is positioned on the side wall above the closed end; the internal thread-containing splicing opening of the grouting joint is positioned inside the grouting joint and fixedly connected above the grouting inner pipe, so that the internal thread-containing splicing opening is communicated with the grouting inner pipe.
The use method of the high-efficiency anti-blocking backflow grouting pipe comprises the following steps as shown in fig. 5:
connecting a grouting joint with a lower end joint by utilizing the matching between an outer-containing splicing joint and an inner-containing splicing joint, and installing a sealing ring at the splicing joint; the drill bit is started to drill, the middle sections are synchronously increased according to the drilling depth, the more the middle sections are installed, the longer the length of the pipe body is, and the deeper the drilling depth is; when the grouting section reaches the grouting area, connecting the upper end section;
step two, after the installation is finished, the main pipeline in the upper end section can extend downwards, sequentially penetrates through the middle section and the lower end section to reach the grouting section, and is communicated with the grouting inner pipe in the grouting section, a grout flowing space is surrounded outside the grouting inner pipe, the grout flowing space is communicated with the auxiliary pipeline through a grout backflow port between the lower end section and the grouting section, and extends upwards, sequentially penetrates through the lower end section and the middle section to reach the upper end section and is communicated with a backflow water outlet of the upper end section;
thirdly, grouting is started, a grouting pump is connected to the upper end of the upper end section, a first valve is opened, a second valve is closed, and during grouting, grouting can be performed only in the main pipeline through the grouting pump or can be performed simultaneously in the main pipeline and the auxiliary pipeline through the first valve; no matter which kind of slip casting mode above-mentioned, the thick liquid flow process is in the trunk line: the grout sequentially passes through the upper end section, the middle section and the lower end section and finally enters the grouting section; in the grouting section, the grout firstly enters the grouting inner pipe along the main pipeline and descends along the grouting inner pipe, and the bottom of the grouting inner pipe is suspended, so that the grout can pass through the grouting inner pipe and fall into a grout flowing space, thereby ensuring that the grout is always in a flowing state, and under the action of pressure, the grout rises in the grout flowing space and reaches a grout outlet; when grouting is carried out in the auxiliary pipeline, the slurry in the auxiliary pipeline enters a slurry flowing space along the auxiliary pipeline through the slurry return port and reaches the slurry outlet;
step four, the pressure-resistant rubber sleeve at the grout outlet is made into rubber sleeves with different pressure-resistant grades according to the pressure used in grouting, when grouting is carried out and the pressure provided by a grouting pump is higher than the pressure of the pressure-resistant rubber sleeve, the pressure-resistant rubber sleeve is opened, and grout can be injected into the stratum through the grout outlet to realize grouting;
stopping grouting, when the grouting reaches a preset effect or the grout waits for setting, cleaning the interior of the pipeline, closing a first valve, pumping water into the main pipeline through a grouting pump, enabling water flow to directly enter a grouting section along the main pipeline and enter a grout flowing space through a grouting inner pipe, enabling the pressure provided by the grouting pump to be less than or equal to the pressure of the pressure-resistant rubber sleeve, enabling the water flow not to flow out of the pressure-resistant rubber sleeve, forming a relatively sealed space in the grouting section, enabling the water flow to enter an auxiliary pipeline along a grout return port and further to flow upwards to an upper end section under the action of pressure, opening a second valve on a return water outlet, enabling the water flow to flow out of the return water outlet, and enabling the return water outlet to be connected with a wastewater recovery device to recover the flowing water; the grouting pipe cleaning device has the advantages that the grouting pipe is not lifted, no dead angle is left for cleaning, the grouting pipe blocking phenomenon caused by segregation and precipitation of the grout when the grout waits for setting is effectively prevented, and accordingly smooth follow-up grouting is guaranteed.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (6)
1. The utility model provides a but high-efficient anti-blocking backflow slip casting pipe which characterized in that: the pipe body is formed by splicing and assembling a plurality of pipe sections; the pipe joint sequentially comprises an upper end joint (1), a lower end joint (2) and a grouting joint (3) from top to bottom;
a main pipeline (4) and an auxiliary pipeline (5) are arranged in the upper end section and the lower end section in the same way, the auxiliary pipeline is positioned beside the main pipeline, the main pipeline and the auxiliary pipeline are not communicated with each other, the main pipeline of the upper end section is communicated with the main pipeline of the lower end section, and the auxiliary pipeline of the upper end section is communicated with the auxiliary pipeline of the lower end section; the top of the auxiliary pipeline in the upper end section is provided with a backflow water outlet (6) communicated with the outside of the pipe body; the bottom of the auxiliary pipeline in the lower end section is provided with a slurry return port (7);
the grouting joint is the last joint of the pipe body, a grouting inner pipe (8) communicated with the main pipe is arranged inside the grouting joint, the diameter of the grouting inner pipe is smaller than that of the grouting joint, a slurry flowing space (9) is formed between the grouting inner pipe and the inner wall of the grouting joint at intervals, the bottom of the grouting inner pipe is opened, the bottom end of the grouting inner pipe is suspended in the grouting joint, the grouting inner pipe is communicated with the slurry flowing space, and therefore slurry is guaranteed to be in a flowing state all the time; the slurry flowing space at the upper part of the grouting pipe is provided with an opening matched with the slurry return port, so that the slurry flowing space is communicated with the auxiliary pipeline through the slurry return port;
a plurality of slurry outlets (10) are formed in the surface of the grouting joint and communicated with the slurry flowing space, and the slurry outlets are wrapped by pressure-resistant rubber sleeves (11); the lower end of the grouting joint is provided with an automatic drill bit (12).
2. The high-efficiency anti-blocking backflow grouting pipe according to claim 1, characterized in that: the top end and the bottom end of the upper end section are both provided with an outer-thread-containing splicing port (13) which protrudes outwards, and the outer-thread-containing splicing port at the top end of the upper end section is used for being connected with a grouting pump in a spiral mode; the top end of the lower end section is provided with an inwards concave splicing port (14) containing internal threads, and the splicing port containing the internal threads is matched with the splicing port containing the external threads; the bottom end of the lower end section is provided with an outer thread splicing port; the top end of the grouting section is provided with an inner-thread-containing splicing port, and the grouting section is fixed with the lower end section in a manner of spirally splicing the inner thread and the outer thread.
3. The high-efficiency anti-blocking backflow grouting pipe according to claim 2, characterized in that: the pipe joint also comprises one or more middle joints (15), a main pipeline (4) and an auxiliary pipeline (5) are arranged in each middle joint and are the same as the upper end joint, and the main pipeline and the auxiliary pipelines are communicated up and down; the top end of the middle section is provided with an internal thread splicing port (14) which is used for spirally splicing with the upper end section; the bottom end of the middle section is provided with an outer-containing screw splicing port for spirally splicing with the lower end section.
4. The high-efficiency anti-blocking backflow grouting pipe according to claim 3, characterized in that: the top end of the upper end section auxiliary pipeline is sealed through a first valve (18), a backflow water outlet (6) is formed in the side wall of the auxiliary pipeline on the lower side of the sealed end, and a second valve (16) is arranged at the backflow water outlet.
5. The high-efficiency anti-blocking backflow grouting pipe according to claim 4, characterized in that: the bottom end of the lower end section auxiliary pipeline is closed, so that the auxiliary pipeline is isolated from a main pipeline communicated with a splicing port containing external threads, and a slurry return port (7) is positioned on the side wall above the closed end; the internal thread-containing splicing opening of the grouting joint is positioned inside the grouting joint and fixedly connected above the grouting inner pipe, so that the internal thread-containing splicing opening is communicated with the grouting inner pipe.
6. The use method of the high-efficiency anti-blocking backflow grouting pipe according to any one of claims 1 to 5, characterized by comprising the following steps: the method comprises the following steps:
connecting a grouting joint with a lower end joint by utilizing the matching between an outer-containing splicing joint and an inner-containing splicing joint, and installing a sealing ring at the splicing joint; the drill bit is started to drill, the middle sections are synchronously increased according to the drilling depth, the more the middle sections are installed, the longer the length of the pipe body is, and the deeper the drilling depth is; when the grouting section reaches the grouting area, connecting the upper end section;
step two, after the installation is finished, the main pipeline in the upper end section can extend downwards, sequentially penetrates through the middle section and the lower end section to reach the grouting section, and is communicated with the grouting inner pipe in the grouting section, a grout flowing space is surrounded outside the grouting inner pipe, the grout flowing space is communicated with the auxiliary pipeline through a grout backflow port between the lower end section and the grouting section, and extends upwards, sequentially penetrates through the lower end section and the middle section to reach the upper end section and is communicated with a backflow water outlet of the upper end section;
thirdly, grouting, connecting a grouting pump at the upper end of the upper end section, opening a first valve, closing a second valve, and grouting into the main pipeline and the auxiliary pipeline through the grouting pump or grouting into the main pipeline only; at the moment, the flow processes of the slurry in the main pipeline are as follows: the grout sequentially passes through the upper end section, the middle section and the lower end section and finally enters the grouting section; in the grouting section, the grout firstly enters the grouting inner pipe along the main pipeline and descends along the grouting inner pipe, and the bottom of the grouting inner pipe is suspended, so that the grout can pass through the grouting inner pipe and fall into a grout flowing space, thereby ensuring that the grout is always in a flowing state, and under the action of pressure, the grout rises in the grout flowing space and reaches a grout outlet; the slurry in the auxiliary pipeline enters the slurry flowing space through the slurry return port along the auxiliary pipeline and reaches the slurry outlet;
step four, the pressure-resistant rubber sleeve at the grout outlet is made into rubber sleeves with different pressure-resistant grades according to the pressure used in grouting, when grouting is carried out and the pressure provided by a grouting pump is higher than the pressure of the pressure-resistant rubber sleeve, the pressure-resistant rubber sleeve is opened, and grout can be injected into the stratum through the grout outlet to realize grouting;
step five, stopping grouting, cleaning the interior of the pipeline when the grouting reaches a preset effect or the grout waits for setting, closing a first valve, pumping water into the main pipeline through a grouting pump, directly feeding water flow into a grouting section along the main pipeline, and can penetrate through the grouting inner pipe to enter a slurry flowing space, the pressure provided by the grouting pump is less than or equal to the pressure of the pressure-resistant rubber sleeve, water flow cannot flow out of the pressure-resistant rubber sleeve, so that a relatively sealed space is formed in the grouting section, and water flow can enter the auxiliary pipeline along the slurry backflow port and further go upwards to the upper end section under the action of pressure, and the second valve on the backflow water outlet is opened, so that the water flow flows out from the backflow water outlet, the grouting pipe is cleaned without dead angle, the grouting pipe blockage phenomenon caused by slurry segregation and precipitation when slurry is waiting for setting is effectively prevented, and the smooth proceeding of subsequent grouting is ensured.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802580A (en) * | 2021-08-29 | 2021-12-17 | 深圳市勘察测绘院(集团)有限公司 | A cementer that is used for dregs side slope to strut anti-collapse |
| CN113982653A (en) * | 2021-12-02 | 2022-01-28 | 河北交通职业技术学院 | Tunnel fractured rock mass grouting water plugging device and method |
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| CN113982653B (en) * | 2021-12-02 | 2022-05-03 | 河北交通职业技术学院 | Tunnel fractured rock mass grouting water plugging device and method |
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