CN114718100B - Water-stop grouting construction method - Google Patents
Water-stop grouting construction method Download PDFInfo
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- CN114718100B CN114718100B CN202210287253.6A CN202210287253A CN114718100B CN 114718100 B CN114718100 B CN 114718100B CN 202210287253 A CN202210287253 A CN 202210287253A CN 114718100 B CN114718100 B CN 114718100B
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 93
- 239000007924 injection Substances 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 43
- 230000008569 process Effects 0.000 claims abstract description 28
- 239000002689 soil Substances 0.000 claims description 48
- 239000002002 slurry Substances 0.000 claims description 34
- 239000011440 grout Substances 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000000565 sealant Substances 0.000 claims 2
- 239000011800 void material Substances 0.000 abstract description 2
- 230000010485 coping Effects 0.000 abstract 1
- 238000007569 slipcasting Methods 0.000 description 20
- 239000007788 liquid Substances 0.000 description 12
- 210000004712 air sac Anatomy 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 8
- 230000008595 infiltration Effects 0.000 description 7
- 238000001764 infiltration Methods 0.000 description 7
- 238000010943 off-gassing Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
-
- 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
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a water stop grouting construction method, which aims to provide a method capable of meeting the requirement of emergency plugging and realizing rapid coping with the leakage problem in foundation pit engineering; and in the air bag deflation process, the deflation air pressure and the deflation rate can be effectively controlled, so that the problem of void collapse even due to blockage failure of a water seepage part caused by too fast deflation is prevented. The integrated multi-unit air bag type water stop grouting device comprises a grouting part, wherein the grouting part comprises an elastic grouting bag and a grouting pipe, one end of the grouting pipe is communicated with the elastic grouting bag, and a plurality of grouting holes are formed in the side wall of the elastic grouting bag; the integrated gas injection component comprises a plurality of gas bags distributed in the elastic grouting bags and gas injection pipes corresponding to the gas bags one by one, and the gas bags are communicated with the corresponding gas injection pipes through connecting hoses.
Description
Technical Field
The invention relates to the field of foundation pit engineering groundwater infiltration damage grouting water stop, in particular to an integrated multi-unit air bag type water stop grouting device and a water stop grouting construction method.
Background
As urban ground space utilization becomes increasingly saturated, development and utilization of underground space becomes increasingly critical to urban sustainable development. In urban engineering construction, foundation pit engineering is a key link in the urban engineering construction, and plays a role in determining success and failure of engineering. The existing data show that most foundation pit engineering accidents are related to underground water at present, wherein the underground water seepage is one of important factors for foundation pit accidents. In foundation pit engineering, along with the continuous increase of excavation depth, the influence on the surrounding environment is gradually increased, and especially in the foundation pit engineering of the silt stratum with higher groundwater level, groundwater seepage phenomenon is more likely to occur, and even engineering accidents such as failure or serious seepage of a waterproof curtain are caused. Aiming at the problems, a common treatment mode is to perform grouting on leakage points so as to block the seepage channels. However, the existing grouting plugging method has the defects that the grouting slurry has longer solidification time, so that the grouting plugging time for the leakage point is longer, the efficiency is lower, and the emergency plugging requirement cannot be met.
In order to solve the defects of the existing grouting plugging, some inventors propose a new plugging method, for example, chinese patent application number is CN202010415947.4, and the invention creates a piping water-stop grouting device and a use method thereof, and the method adopts the steps that an air bag is extruded in a seepage channel, and then the air bag is inflated firstly, so that the rapid plugging of piping points is realized; then, grouting is carried out in a seepage channel behind the air bag, and the air bag is pulled back at the same time, so that the plugging of the piping point position is realized; in order to smoothly retract the airbag, it is necessary to release the gas in the airbag at the time of retraction. The application can meet the need of emergency blocking; however, the air bag has the following defects that on one hand, the air pressure in the air bag is difficult to control in the air bag deflation process due to the large volume and air pressure of the air bag, and the air bag is difficult to smoothly retract due to the too small air pressure in the air bag deflation process; the problem of cavity collapse is easily caused by overlarge air pressure in the air bag; on the other hand, in the process of pulling back the air bag, the operation is difficult and complex, the disturbance to the surrounding soil mass is large, and the problem of cavity collapse is easily caused.
Disclosure of Invention
The invention aims to provide a device which can meet the requirement of emergency plugging and can rapidly cope with the leakage problem in foundation pit engineering; and in the air bag deflation process, the deflation air pressure and the deflation rate can be effectively controlled, so that the problem of void collapse even due to blockage failure of a water seepage part caused by too fast deflation is prevented.
The technical scheme of the invention is as follows:
an integrated multi-cell air bag type water stop grouting device comprising:
the grouting component comprises an elastic grouting bag and a grouting pipe, one end of the grouting pipe is communicated with the elastic grouting bag, and a plurality of grouting holes are formed in the side wall of the elastic grouting bag;
the integrated gas injection component comprises a plurality of gas bags distributed in the elastic grouting bags and gas injection pipes corresponding to the gas bags one by one, and the gas bags are communicated with the corresponding gas injection pipes through connecting hoses.
Compared with the prior art of direct grouting plugging, the method has the advantages that the grouting plugging time is long, the efficiency is low, and the emergency plugging requirement cannot be met. The integrated multi-unit air bag type water stop grouting device of the scheme can be used for placing the elastic grouting bag into the position where the leakage point is located, and then the air bag is inflated through the air injection pipe, so that the elastic grouting bag is inflated under the extrusion action of each air bag, temporary plugging of the leakage point is achieved, the requirement of emergency plugging is met, and the problem of leakage in foundation pit engineering is rapidly handled.
More importantly, the elastic grouting bags of the integrated multi-unit air bag type water stop grouting device comprise a plurality of independent air bags, and air injection and deflation can be independently carried out on each air bag through a corresponding air injection pipe; on the other hand, adopt a plurality of independent air bags, in grouting process in to the elasticity slip casting bag, can adopt to carry out gassing one by one to each air bag, come effectual control gassing atmospheric pressure and gassing speed to replace the space that original air bag occupy gradually through the thick liquid, so that each air bag carries out the in-process of gassing one by one, elasticity slip casting bag remains the inflation state throughout, and elasticity slip casting bag remains extrusion and the support to the soil layer throughout promptly, thereby prevents to lead to the shutoff inefficacy to infiltration position because of gassing is too fast, causes the cavity problem of collapsing even.
Preferably, the elastic grouting bag comprises an elastic outer bag and an elastic inner bag positioned in the elastic outer bag, a plurality of grouting holes are formed in the side walls of the elastic outer bag and the elastic inner bag, one end of the grouting pipe penetrates through the side wall of the elastic outer bag and is communicated with the elastic inner bag, one part of air bags in each air bag are uniformly distributed between the elastic outer bag and the elastic inner bag, and the other part of air bags are distributed in the elastic inner bag.
In order to avoid the occurrence of the air bags on one side in the elastic grouting bags in the air release process, the air bags on one side in the elastic grouting bags are firstly released, so that the slurry injected into the elastic grouting bags extrudes all the air bags to the other side of the elastic grouting bags, most of the air bags in the elastic grouting bags are extruded and gathered to one side of the elastic grouting bags after the air bags are released, grouting holes on one side of the elastic grouting bags are blocked, the diffusion of the slurry to one side direction in a soil body is further influenced, and seepage channels in all directions in the soil body are not blocked. In order to solve the problem, the scheme improves the distribution of the elastic grouting bags and each air bag, the air bags in the middle part can be firstly deflated when in deflation, and the air bags around the air bags can be deflated; specifically, in the deflation process of each air bag, each air bag in the elastic inner bag can be firstly deflated one by one, the space occupied by the original air bag in the elastic inner bag is gradually replaced by slurry, and after the deflation of each air bag in the elastic inner bag is completed, the slurry is filled in the elastic inner bag and injected into the elastic outer bag through a grouting hole on the elastic inner bag; then, each air bag between the elastic outer bag and the elastic inner bag is deflated one by one, and the space occupied by the original air bag between the elastic outer bag and the elastic inner bag is gradually replaced by slurry, so that the elastic outer bag is always kept in an inflated state; therefore, after each air sac is deflated, most air sacs in the elastic grouting sacs are extruded and gathered to one side of the elastic grouting sacs, grouting holes on one side of the elastic grouting sacs are blocked, and further the diffusion of grout to one side direction in a soil body is affected, so that the problem that seepage channels in all directions in the soil body are not blocked is solved.
Preferably, the air bags distributed between the elastic outer bag and the elastic inner bag are fixed on the inner wall of the elastic outer bag through flexible connecting pieces, or the air bags distributed between the elastic outer bag and the elastic inner bag are fixed on the inner wall of the elastic outer bag through viscose. Thus, after the air bags distributed between the elastic outer bag and the elastic inner bag are deflated, the air bags distributed between the elastic outer bag and the elastic inner bag can be further prevented from being gathered together, even if part of the air bags in the elastic inner bag are gathered after being deflated, the grout can still be injected into the soil body in all directions through grouting holes on the elastic outer bag after entering between the elastic outer bag and the elastic inner bag, so as to block seepage channels in all directions in the soil body, and the blocking effect of the seepage channels and the soil body reinforcing effect are improved; further avoid each air bag gassing back, most air bags are pressed the gathering to the certain side of elasticity slip casting bag, and block up the slip casting hole of certain side of elasticity slip casting bag, and then influence the diffusion of thick liquid to the certain side direction in the soil body, be unfavorable for the problem of the seepage flow passageway of all directions in the shutoff soil body.
Preferably, the grouting pipe is provided with a mounting plate, and the mounting plate is provided with a plurality of limiting holes corresponding to the gas injection pipe, and the limiting holes of the gas injection pipe penetrate through the corresponding limiting holes of the gas injection pipe. So, can carry out spacingly to the arrangement of annotating the trachea through the mounting disc.
The water stopping grouting construction method utilizes an integrated multi-unit air bag type water stopping grouting device for construction, and sequentially comprises the following steps of,
(1) Forming a mounting hole for placing the elastic grouting bag at the leakage point;
(2) Placing the elastic grouting bag into the mounting hole;
(3) The leakage points are temporarily plugged, the gas injection device is connected with each gas injection pipe, gas injection is carried out on the gas bags in the elastic grouting bags through the gas injection device and the gas injection pipes, and the gas injection of each gas bag is expanded, so that the elastic grouting bags expand under the extrusion action of the gas bags, and the temporary plugging of the leakage points is realized;
(4) Grouting and plugging leakage points, connecting a grouting device with a grouting pipe, injecting grout into the elastic grouting bags through the grouting pipe, and simultaneously deflating the bags one by one in the process so as to gradually replace the space occupied by the original bags by the grout, so that the elastic grouting bags always maintain an inflated state in the process of deflating the bags one by one;
after the air bags are deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipes, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing. So, adopt to carry out gassing one by one to each air bag, come effectual control gassing atmospheric pressure and gassing speed to replace original air bag occupied space gradually through the thick liquid, so that each air bag carries out the in-process of gassing one by one, elasticity slip casting bag remains the inflation state throughout, and elasticity slip casting bag remains extrusion and the support to the soil layer throughout promptly, thereby prevents to lead to the shutoff inefficacy to infiltration position because of the gassing is too fast, causes the cavity problem of collapsing even.
Preferably, in the step (2), after the elastic grouting bag is placed in the mounting hole, a sealing section is formed in the mounting hole at the outer side of the elastic grouting bag by injecting sealing glue into the mounting hole so as to seal gaps among the grouting pipe, each grouting pipe and the inner wall of the mounting hole. Therefore, water and slurry in the soil body can be prevented from seeping out from gaps among the grouting pipes, the grouting pipes and the inner walls of the mounting holes.
The water stopping grouting construction method utilizes an integrated multi-unit air bag type water stopping grouting device for construction, and sequentially comprises the following steps of,
(1) Forming a mounting hole for placing the elastic grouting bag at the leakage point;
(2) Placing the elastic grouting bag into the mounting hole;
(3) The leakage points are temporarily plugged, the gas injection device is connected with each gas injection pipe, gas injection is carried out on the gas bags in the elastic grouting bags through the gas injection device and the gas injection pipes, and the gas injection of each gas bag is expanded, so that the elastic grouting bags expand under the extrusion action of the gas bags, and the temporary plugging of the leakage points is realized;
(4) The leakage point grouting plugging is carried out, the grouting device is connected with the grouting pipe, grout is injected into the elastic inner bag through the grouting pipe, in the process, each air bag in the elastic inner bag is firstly deflated one by one, the space occupied by the original air bag in the elastic inner bag is gradually replaced by the grout, so that the elastic inner bag is always kept in an inflated state, and after the deflation of each air bag in the elastic inner bag is completed, the grout is filled in the elastic inner bag and is injected into the elastic outer bag through the grouting holes in the elastic inner bag;
then, each air bag between the elastic outer bag and the elastic inner bag is deflated one by one, and the space occupied by the original air bag between the elastic outer bag and the elastic inner bag is gradually replaced by slurry, so that the elastic outer bag is always kept in an inflated state;
after the air bags in the elastic grouting bags are completely deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipe, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing.
So, adopt to carry out gassing one by one to each air bag, come effectual control gassing atmospheric pressure and gassing speed to replace original air bag occupied space gradually through the thick liquid, so that each air bag carries out the in-process of gassing one by one, elasticity slip casting bag remains the inflation state throughout, and elasticity slip casting bag remains extrusion and the support to the soil layer throughout promptly, thereby prevents to lead to the shutoff inefficacy to infiltration position because of the gassing is too fast, causes the cavity problem of collapsing even. More importantly, the air bags at the periphery are deflated by firstly deflating the air bags at the middle part; the problem that most air bags are extruded and gathered to one side of the elastic grouting bag after the air bags are deflated, grouting holes on one side of the elastic grouting bag are blocked, and then the diffusion of slurry to one side direction in a soil body is affected, so that seepage channels in all directions in the soil body are not blocked is solved.
Preferably, in the step (4), in the process of deflating each air bag in the elastic inner bag one by one, the air pressure in each air bag between the elastic outer bag and the elastic inner bag is kept unchanged, so as to ensure that the elastic outer bag is always kept in an inflated state.
Preferably, in the step (2), after the elastic grouting bag is placed in the mounting hole, a sealing section is formed in the mounting hole at the outer side of the elastic grouting bag by injecting sealing glue into the mounting hole so as to seal gaps among the grouting pipe, each grouting pipe and the inner wall of the mounting hole. Therefore, water and slurry in the soil body can be prevented from seeping out from gaps among the grouting pipes, the grouting pipes and the inner walls of the mounting holes.
The beneficial effects of the invention are as follows: not only can the requirement of emergency plugging be met, but also the problem of leakage in foundation pit engineering can be rapidly solved; in addition, the air pressure and the air release rate of the air bag can be effectively controlled in the air release process of the air bag, so that the problem that the water seepage part is blocked and invalid and even a cavity collapses due to too fast air release is prevented.
Drawings
FIG. 1 is a schematic view showing a partial structure of an integrated multi-unit air bag type water stop grouting device according to a first embodiment of the present invention (the air bag in the drawing is in an inflated state);
fig. 2 is a schematic cross-sectional view of a grouting pipe and a gas injection pipe of an integrated multi-unit air bag type water stop grouting device according to a first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of an elastic grouting bag of an integrated multi-cell air-bag type water stop grouting device according to a second embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure of an integrated multi-unit air bag type water stop grouting device according to a first embodiment of the present invention after the device is installed in a leakage point (in the figure, the air bag is in a non-grouting contracted state, the elastic grouting bag is in a non-grouting contracted state, and the leakage point is a leakage point of a side wall of a foundation pit).
Fig. 5 is a schematic cross-sectional structure of an integrated multi-unit air bag type water stop grouting device according to a first embodiment of the present invention, after the integrated multi-unit air bag type water stop grouting device is installed in a leakage point, the air bag is inflated by inflation of the air bag, and the leakage point is a leakage point of a side wall of a foundation pit.
Fig. 6 is a schematic cross-sectional structure diagram of an integrated multi-unit air bag type water stop grouting device according to a first embodiment of the invention, after the integrated multi-unit air bag type water stop grouting device is installed in a leakage point, the air bags are deflated one by one, and the grouting process is performed on the elastic grouting bags (the leakage point in the figure is the leakage point of the side wall of a foundation pit).
Fig. 7 is a schematic cross-sectional structure of an integrated multi-unit air bag type water stop grouting device according to a first embodiment of the present invention in a grouting process for an elastic grouting bag after each air bag is completely deflated after the integrated multi-unit air bag type water stop grouting device is installed in a leakage point (the leakage point in the figure is a leakage point of a side wall of a foundation pit).
In the figure:
a grouting part 1, an elastic grouting bag 1.1, an elastic outer bag 1.11, an elastic inner bag 1.12, a grouting pipe 1.2 and a grouting hole 1.3;
an integrated gas injection part 2, a gas bag 2.1, a gas injection pipe 2.2 and a connecting hose 2.3;
and the mounting plate 3 and the limit hole 3.1 of the gas injection pipe.
Detailed Description
First embodiment: as shown in fig. 1, an integrated multi-unit air bag type water stop grouting device comprises a grouting component 1 and an integrated gas injection component 2. The grouting part comprises an elastic grouting bag 1.1 and a grouting pipe 1.2, and one end of the grouting pipe is communicated with the elastic grouting bag. The side wall of the elastic grouting bag is provided with a plurality of grouting holes 1.3. The integrated gas injection part 2 comprises a plurality of gas bags 2.1 distributed in the elastic grouting bags and gas injection pipes 2.2 which are in one-to-one correspondence with the gas bags. The air bag is communicated with the corresponding air injection pipe through a connecting hose 2.3. In this embodiment, the grouting pipe is fixedly connected with the elastic grouting bag. The grouting holes are uniformly distributed on the side wall of the elastic grouting bag, and the elastic grouting bag is a rubber bag. The air bags are also rubber air bags. The connecting hose passes through the elastic grouting bag, the connecting hose passes through the elastic grouting bag through the grouting hole, or a through hole is formed in the side wall of the elastic grouting bag, and the connecting hose passes through the side wall of the elastic grouting bag through the through hole.
As shown in fig. 4 and 5, compared with the conventional direct grouting plugging technology, the method has the problems that the grouting plugging time is long, the efficiency is low, and the emergency plugging requirement cannot be met. The integrated multi-unit air bag type water stop grouting device of the embodiment can be used for placing the elastic grouting bag into the position where the leakage point is located, and then the air bag is inflated through the air injection pipe, so that the elastic grouting bag is inflated under the extrusion action of each air bag, temporary plugging of the leakage point is achieved, the requirement of emergency plugging is met, and the problem of leakage in foundation pit engineering is rapidly handled.
Then, as shown in fig. 6 and 7, the grouting liquid is injected into the elastic grouting bags through the grouting pipe, and in the process, each air bag is deflated one by one, so that the space occupied by the original air bags is gradually replaced by the grouting liquid, and in the process of deflating each air bag one by one, the elastic grouting bags always keep an inflated state; after the air bags are deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipes, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing. Because the elastic grouting bags comprise a plurality of independent air bags, the air bags can be independently inflated and deflated through the corresponding air injection pipes, on one hand, the air injection is carried out through the plurality of air injection pipes, the air injection efficiency can be improved when the air injection expands, the construction efficiency of temporary plugging is further improved, and the requirement on quick plugging of seepage points is met; on the other hand, adopt a plurality of independent air bags, in grouting process in to the elasticity slip casting bag, can adopt to carry out gassing one by one to each air bag, come effectual control gassing atmospheric pressure and gassing speed to replace the space that original air bag occupy gradually through the thick liquid, so that each air bag carries out the in-process of gassing one by one, elasticity slip casting bag remains the inflation state throughout, and elasticity slip casting bag remains extrusion and the support to the soil layer throughout promptly, thereby prevents to lead to the shutoff inefficacy to infiltration position because of gassing is too fast, causes the cavity problem of collapsing even.
Further, as shown in fig. 2, a mounting plate 3 is provided on the grouting pipe, and the mounting plate is fixed on the grouting pipe. The mounting plate is provided with a plurality of limit holes 3.1 corresponding to the gas injection pipes one by one. The gas injection pipe limiting holes penetrate through the corresponding gas injection pipe limiting holes. So, can carry out spacingly to the arrangement of annotating the trachea through the mounting disc. In this embodiment, the gas injection pipes are uniformly distributed around the grouting pipe.
Furthermore, each gas injection pipe is provided with a switch valve, so that the gas injection pipe can be opened or closed through the switch valve.
Specific embodiment II: the rest of the structure of this embodiment is different from the first embodiment in that,
as shown in fig. 3, the elastomeric grouting bladder 1.1 comprises an elastomeric outer bladder 1.11 and an elastomeric inner bladder 1.12 positioned within the elastomeric outer bladder. The side walls of the elastic outer bag and the elastic inner bag are respectively provided with a plurality of grouting holes. The elastic outer bag and the elastic inner bag are rubber bags. One end of the grouting pipe penetrates through the side wall of the elastic outer bag and is communicated with the elastic inner bag, the grouting pipe is connected with the side wall of the elastic outer bag in a sealing mode, and the grouting pipe is fixedly connected with the elastic outer bag and the elastic inner bag respectively. Some of the air bags 2.1 are uniformly distributed between the elastic outer bag and the elastic inner bag, and the other part of the air bags 2.1 are distributed in the elastic inner bag. In this embodiment, the gas injection pipe is located outside the elastic outer bag, and the connection hose connected with the air bags distributed between the elastic outer bag and the elastic inner bag passes through the elastic outer bag, and the connection hose connected with the air bags distributed in the elastic inner bag sequentially passes through the elastic outer bag and the elastic inner bag.
In order to avoid the occurrence of the air bags on one side in the elastic grouting bags in the air release process, the air bags on one side in the elastic grouting bags are firstly released, so that the slurry injected into the elastic grouting bags extrudes all the air bags to the other side of the elastic grouting bags, most of the air bags in the elastic grouting bags are extruded and gathered to one side of the elastic grouting bags after the air bags are released, grouting holes on one side of the elastic grouting bags are blocked, the diffusion of the slurry to one side direction in a soil body is further influenced, and seepage channels in all directions in the soil body are not blocked. In order to solve the problem, the scheme improves the distribution of the elastic grouting bags and each air bag, the air bags in the middle part can be firstly deflated when in deflation, and the air bags around the air bags can be deflated; specifically, in the deflation process of each air bag, each air bag in the elastic inner bag can be firstly deflated one by one, the space occupied by the original air bag in the elastic inner bag is gradually replaced by slurry, and after the deflation of each air bag in the elastic inner bag is completed, the slurry is filled in the elastic inner bag and injected into the elastic outer bag through a grouting hole on the elastic inner bag; then, each air bag between the elastic outer bag and the elastic inner bag is deflated one by one, and the space occupied by the original air bag between the elastic outer bag and the elastic inner bag is gradually replaced by slurry, so that the elastic outer bag is always kept in an inflated state; therefore, after each air sac is deflated, most air sacs in the elastic grouting sacs are extruded and gathered to one side of the elastic grouting sacs, grouting holes on one side of the elastic grouting sacs are blocked, and further the diffusion of grout to one side direction in a soil body is affected, so that the problem that seepage channels in all directions in the soil body are not blocked is solved.
In one implementation of this embodiment, the air bags distributed between the elastic outer bag and the elastic inner bag are fixed on the inner wall of the elastic outer bag by flexible connecting pieces, and the flexible connecting pieces are connecting wires or connecting ropes.
In another implementation of this embodiment, the air bags distributed between the elastic outer bag and the elastic inner bag are fixed to the inner wall of the elastic outer bag by means of an adhesive.
The air bags distributed between the elastic outer bag and the elastic inner bag are fixed on the inner wall of the elastic outer bag, so that the air bags distributed between the elastic outer bag and the elastic inner bag can be further prevented from being gathered together after being deflated, even if part of the air bags in the elastic inner bag are gathered after being deflated, grout can still be injected into all directions in a soil body through grouting holes on the elastic outer bag after entering between the elastic outer bag and the elastic inner bag, so that seepage channels in all directions in the soil body are plugged, and the plugging effect and the soil body reinforcing effect of the seepage channels are improved; further avoid each air bag gassing back, most air bags are pressed the gathering to the certain side of elasticity slip casting bag, and block up the slip casting hole of certain side of elasticity slip casting bag, and then influence the diffusion of thick liquid to the certain side direction in the soil body, be unfavorable for the problem of the seepage flow passageway of all directions in the shutoff soil body.
Third embodiment: a water-stopping grouting construction method utilizes an integrated multi-unit air bag type water-stopping grouting device for construction. In this embodiment, the specific structure of the integrated multi-unit air bag type water stop grouting device refers to the first embodiment.
The construction method of water stop grouting sequentially comprises the following steps,
(1) Forming a mounting hole for placing the elastic grouting bag at the leakage point;
(2) As shown in fig. 4, the elastic grouting bag is placed in the mounting hole;
(3) As shown in fig. 5, the leakage points are temporarily plugged, an air injection device is connected with each air injection pipe, air injection is carried out on the air bags in the elastic grouting bags through the air injection device and the air injection pipes, so that each air bag is inflated, the elastic grouting bags are inflated under the extrusion action of each air bag, soil layers around the mounting holes are extruded, leakage is blocked, and the temporary plugging of the leakage points is realized; the gas injection device is a gas pump;
(4) As shown in fig. 6, the leakage points are plugged by grouting, the grouting device is connected with the grouting pipe, the grouting liquid is injected into the elastic grouting bags through the grouting pipe, and meanwhile, in the process, each air bag is deflated one by one so as to gradually replace the space occupied by the original air bags through the grouting liquid, so that the elastic grouting bags always maintain an inflated state in the process of deflating the air bags one by one. The grouting device is a grouting pump.
As shown in fig. 7, after the air bags are completely deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipes, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing. So, adopt to carry out gassing one by one to each air bag, come effectual control gassing atmospheric pressure and gassing speed to replace original air bag occupied space gradually through the thick liquid, so that each air bag carries out the in-process of gassing one by one, elasticity slip casting bag remains the inflation state throughout, and elasticity slip casting bag remains extrusion and the support to the soil layer throughout promptly, thereby prevents to lead to the shutoff inefficacy to infiltration position because of the gassing is too fast, causes the cavity problem of collapsing even.
(1) The concrete mode of forming the mounting hole for placing the elastic grouting bag at the leakage point comprises the following two steps of drilling the leakage point to form the mounting hole for placing the elastic grouting bag at the leakage point; secondly, when the leakage point has enough leakage channel, the leakage channel can directly form a mounting hole for placing the elastic grouting bag without drilling operation.
(2) After the elastic grouting bag is placed in the mounting hole, a sealing section is formed in the mounting hole at the outer side of the elastic grouting bag by injecting sealing glue into the mounting hole so as to seal gaps among grouting pipes, all grouting pipes and the inner wall of the mounting hole. Therefore, water and slurry in the soil body can be prevented from seeping out from gaps among the grouting pipes, the grouting pipes and the inner walls of the mounting holes.
(3) In the step, air injection expansion is carried out on each air sac so that the elastic grouting sac expands under the extrusion action of each air sac, and thus, temporary plugging of leakage points is realized; the gas injection pipe is closed, and specifically, a switch valve on the gas injection pipe is closed, so that the air pressure in the air bag is ensured to be stable.
(4) After the steps are completed, the gas injection device and the grouting device are taken down, and then the mounting holes are filled and sealed; or after the air bag is pulled out of the grouting hole through the air injection pipe, the air injection pipe and the air bag are recovered, and then the mounting hole is filled and sealed.
Fourth embodiment: a water-stopping grouting construction method utilizes an integrated multi-unit air bag type water-stopping grouting device for construction. In this embodiment, the specific structure of the integrated multi-unit air bag type water stop grouting device refers to the second embodiment.
The construction method of water stop grouting sequentially comprises the following steps,
(1) Forming a mounting hole for placing the elastic grouting bag at the leakage point;
(2) Placing the elastic grouting bag into the mounting hole;
(3) The leakage points are temporarily plugged, the gas injection device is connected with each gas injection pipe, gas injection is carried out on the gas bags in the elastic grouting bags through the gas injection device and the gas injection pipes, and the gas injection of each gas bag is expanded, so that the elastic grouting bags expand under the extrusion action of the gas bags, and the temporary plugging of the leakage points is realized;
(4) The leakage point grouting plugging is carried out, the grouting device is connected with the grouting pipe, grout is injected into the elastic inner bag through the grouting pipe, in the process, each air bag in the elastic inner bag is firstly deflated one by one, the space occupied by the original air bag in the elastic inner bag is gradually replaced by the grout, so that the elastic inner bag is always kept in an inflated state, and after the deflation of each air bag in the elastic inner bag is completed, the grout is filled in the elastic inner bag and is injected into the elastic outer bag through the grouting holes in the elastic inner bag;
then, each air bag between the elastic outer bag and the elastic inner bag is deflated one by one, and the space occupied by the original air bag between the elastic outer bag and the elastic inner bag is gradually replaced by slurry, so that the elastic outer bag is always kept in an inflated state;
after the air bags in the elastic grouting bags are completely deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipe, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing.
So, adopt to carry out gassing one by one to each air bag, come effectual control gassing atmospheric pressure and gassing speed to replace original air bag occupied space gradually through the thick liquid, so that each air bag carries out the in-process of gassing one by one, elasticity slip casting bag remains the inflation state throughout, and elasticity slip casting bag remains extrusion and the support to the soil layer throughout promptly, thereby prevents to lead to the shutoff inefficacy to infiltration position because of the gassing is too fast, causes the cavity problem of collapsing even. More importantly, the air bags at the periphery are deflated by firstly deflating the air bags at the middle part; the problem that most air bags are extruded and gathered to one side of the elastic grouting bag after the air bags are deflated, grouting holes on one side of the elastic grouting bag are blocked, and then the diffusion of slurry to one side direction in a soil body is affected, so that seepage channels in all directions in the soil body are not blocked is solved.
(1) The concrete mode of forming the mounting hole for placing the elastic grouting bag at the leakage point comprises the following two steps of drilling the leakage point to form the mounting hole for placing the elastic grouting bag at the leakage point; secondly, when the leakage point has enough leakage channel, the leakage channel can directly form a mounting hole for placing the elastic grouting bag without drilling operation.
(2) After the elastic grouting bag is placed in the mounting hole, a sealing section is formed in the mounting hole at the outer side of the elastic grouting bag by injecting sealing glue into the mounting hole so as to seal gaps among grouting pipes, all grouting pipes and the inner wall of the mounting hole. Therefore, water and slurry in the soil body can be prevented from seeping out from gaps among the grouting pipes, the grouting pipes and the inner walls of the mounting holes.
(3) In the step, air injection expansion is carried out on each air sac so that the elastic grouting sac expands under the extrusion action of each air sac, and thus, temporary plugging of leakage points is realized; the gas injection pipe is closed, and specifically, a switch valve on the gas injection pipe is closed, so that the air pressure in the air bag is ensured to be stable.
(4) In the step, in the process of deflating each air bag in the elastic inner bag one by one, the air pressure in each air bag between the elastic outer bag and the elastic inner bag is kept unchanged, so that the elastic outer bag is kept in an expanded state all the time.
(4) After the steps are completed, the gas injection device and the grouting device are taken down, and then the mounting holes are filled and sealed; or after the air bag is pulled out of the grouting hole through the air injection pipe, the air injection pipe and the air bag are recovered, and then the mounting hole is filled and sealed.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent transformation of the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. The water stop grouting construction method is characterized in that the water stop grouting construction method utilizes an integrated multi-unit air bag type water stop grouting device for construction, and the integrated multi-unit air bag type water stop grouting device comprises the following steps:
the grouting component comprises an elastic grouting bag and a grouting pipe, one end of the grouting pipe is communicated with the elastic grouting bag, and a plurality of grouting holes are formed in the side wall of the elastic grouting bag;
the integrated gas injection component comprises a plurality of gas bags distributed in the elastic grouting bags and gas injection pipes corresponding to the gas bags one by one, and the gas bags are communicated with the corresponding gas injection pipes through connecting hoses;
the construction method of water stop grouting sequentially comprises the following steps,
(1) Forming a mounting hole for placing the elastic grouting bag at the leakage point;
(2) Placing the elastic grouting bag into the mounting hole;
(3) The leakage points are temporarily plugged, the gas injection device is connected with each gas injection pipe, gas injection is carried out on the gas bags in the elastic grouting bags through the gas injection device and the gas injection pipes, and the gas injection of each gas bag is expanded, so that the elastic grouting bags expand under the extrusion action of the gas bags, and the temporary plugging of the leakage points is realized;
(4) Grouting and plugging leakage points, connecting a grouting device with a grouting pipe, injecting grout into the elastic grouting bags through the grouting pipe, and simultaneously deflating the bags one by one in the process so as to gradually replace the space occupied by the original bags by the grout, so that the elastic grouting bags always maintain an inflated state in the process of deflating the bags one by one;
after the air bags are deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipes, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing.
2. The method of construction using water stop grouting according to claim 1, wherein in the step (2), after the elastic grouting bag is placed in the mounting hole, a sealing section is formed in the mounting hole outside the elastic grouting bag by injecting a sealant into the mounting hole, so as to seal gaps among the grouting pipe, each grouting pipe and the inner wall of the mounting hole.
3. The water stop grouting construction method according to claim 1 or 2, wherein the grouting pipe is provided with a mounting plate, and the mounting plate is provided with a plurality of limiting holes corresponding to the gas injection pipe, and the limiting holes of the gas injection pipe penetrate through the limiting holes of the gas injection pipe.
4. The water stop grouting construction method is characterized in that the water stop grouting construction method utilizes an integrated multi-unit air bag type water stop grouting device for construction, and the integrated multi-unit air bag type water stop grouting device comprises the following steps:
the grouting component comprises an elastic grouting bag and a grouting pipe, one end of the grouting pipe is communicated with the elastic grouting bag, and a plurality of grouting holes are formed in the side wall of the elastic grouting bag;
the integrated gas injection component comprises a plurality of gas bags distributed in the elastic grouting bags and gas injection pipes corresponding to the gas bags one by one, and the gas bags are communicated with the corresponding gas injection pipes through connecting hoses;
the elastic grouting bags comprise an elastic outer bag and an elastic inner bag positioned in the elastic outer bag, a plurality of grouting holes are formed in the side walls of the elastic outer bag and the side walls of the elastic inner bag, one end of each grouting pipe penetrates through the side wall of the elastic outer bag and is communicated with the elastic inner bag, one part of each air bag is uniformly distributed between the elastic outer bag and the elastic inner bag, and the other part of each air bag is distributed in the elastic inner bag;
the construction method of water stop grouting sequentially comprises the following steps,
(1) Forming a mounting hole for placing the elastic grouting bag at the leakage point;
(2) Placing the elastic grouting bag into the mounting hole;
(3) The leakage points are temporarily plugged, the gas injection device is connected with each gas injection pipe, gas injection is carried out on the gas bags in the elastic grouting bags through the gas injection device and the gas injection pipes, and the gas injection of each gas bag is expanded, so that the elastic grouting bags expand under the extrusion action of the gas bags, and the temporary plugging of the leakage points is realized;
(4) The leakage point grouting plugging is carried out, the grouting device is connected with the grouting pipe, grout is injected into the elastic inner bag through the grouting pipe, in the process, each air bag in the elastic inner bag is firstly deflated one by one, the space occupied by the original air bag in the elastic inner bag is gradually replaced by the grout, so that the elastic inner bag is always kept in an inflated state, and after the deflation of each air bag in the elastic inner bag is completed, the grout is filled in the elastic inner bag and is injected into the elastic outer bag through the grouting holes in the elastic inner bag;
then, each air bag between the elastic outer bag and the elastic inner bag is deflated one by one, and the space occupied by the original air bag between the elastic outer bag and the elastic inner bag is gradually replaced by slurry, so that the elastic outer bag is always kept in an inflated state;
after the air bags in the elastic grouting bags are completely deflated, the grouting device continuously injects the slurry into the elastic grouting bags through the grouting pipe, and the slurry is injected into the soil layer where the leakage points are located through the grouting holes, so that the soil layer where the leakage points are located is subjected to local grouting blocking and reinforcing.
5. The water stop grouting construction method according to claim 4, wherein in the step (4), in the process of deflating each air bag in the elastic inner bag one by one, the air pressure in each air bag between the elastic outer bag and the elastic inner bag is kept unchanged to ensure that the elastic outer bag is kept in an inflated state all the time.
6. The method of construction using water stop grouting according to claim 4, wherein in the step (2), after the elastic grouting bag is placed in the mounting hole, a sealing section is formed in the mounting hole outside the elastic grouting bag by injecting a sealant into the mounting hole, so as to seal gaps among the grouting pipe, each grouting pipe and the inner wall of the mounting hole.
7. The water stop grouting construction method according to claim 4, wherein the air bags distributed between the elastic outer bag and the elastic inner bag are fixed on the inner wall of the elastic outer bag through flexible connecting pieces, or the air bags distributed between the elastic outer bag and the elastic inner bag are fixed on the inner wall of the elastic outer bag through adhesives.
8. The water stop grouting construction method according to claim 4, 5, 6 or 7, wherein the grouting pipe is provided with a mounting plate, and the mounting plate is provided with a plurality of limiting holes corresponding to the air injection pipe, and the limiting holes of the air injection pipe penetrate through the limiting holes of the air injection pipe.
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