CN111945703A - Drainage structure for foundation stabilization and drainage method thereof - Google Patents
Drainage structure for foundation stabilization and drainage method thereof Download PDFInfo
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- CN111945703A CN111945703A CN202010838487.6A CN202010838487A CN111945703A CN 111945703 A CN111945703 A CN 111945703A CN 202010838487 A CN202010838487 A CN 202010838487A CN 111945703 A CN111945703 A CN 111945703A
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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
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Abstract
The application discloses a drainage structure for foundation stabilization and a drainage method thereof, relates to the technical field of foundations, and solves the problem of post-construction settlement, the drainage structure comprises sand bags filled with sand and sand wells used for installing the sand bags, and also comprises grouting pipes arranged in the sand bags, the grouting pipes are of a hollow structure, two ends of each grouting pipe are respectively and fixedly connected with two ends of each sand bag, one end of each grouting pipe is a closed end, the other end of each grouting pipe is provided with grouting holes, and the grouting pipes are uniformly provided with grouting holes; the grouting pipe is characterized in that a positioning disc is sleeved on the grouting pipe, through holes used for water permeation are evenly distributed in the positioning disc, the grouting pipe is fixedly connected with a plurality of limiting rings along the length direction of the grouting pipe, the diameters of the limiting rings on the grouting pipe are gradually increased along the length direction of the grouting pipe, the limiting ring with the largest diameter is close to the closed end of the grouting pipe, the inner diameter of the positioning disc is gradually increased, the positioning disc corresponds to the limiting rings, and the positioning disc is abutted to the limiting rings.
Description
Technical Field
The application relates to the technical field of foundations, in particular to a drainage structure for foundation reinforcement and a drainage method thereof.
Background
The soft soil foundation is widely distributed on coastal and inland river banks and lake regions in China, has low bearing capacity, large settling amount, uneven settling, slow drainage consolidation and long deformation stabilization time, and can influence the use of an upper structure due to improper treatment. Therefore, the foundation needs to be reinforced, and the existing foundation reinforcing methods are various, such as rolling compaction, dynamic compaction, bagged sand wells and the like. The bagged sand well has the advantages of simple construction, low manufacturing cost and the like.
At present, in a bagged sand well, as described in patent of publication No. CN209066467U, after drilling holes in a foundation, medium and coarse sand is poured into woven bags, and then the woven bags are placed into the holes to form the bagged sand well, most of the woven bags are buried in the foundation, the length of the woven bags buried in the foundation is between 10 meters and 15 meters, and the small woven bags are exposed out of the foundation, the bagged sand well forms a vertical drainage channel in the foundation, and water in the foundation is discharged through the drainage channel to consolidate soil in the foundation, so that the foundation is firmer.
According to the related technology, after drainage in the foundation is finished, the vertical drainage channel also has a drainage function, so that the problem of post-construction settlement occurs.
Disclosure of Invention
In order to improve the problem of post-construction settlement, the application provides a drainage structure for foundation stabilization and a drainage method thereof.
In a first aspect, the present application provides a drainage structure for foundation stabilization, which adopts the following technical scheme:
a drainage structure for foundation reinforcement comprises sand bags filled with gravels, a sand well used for mounting the sand bags, and a grouting pipe mounted in the sand bags, wherein the grouting pipe is of a hollow structure, two ends of the grouting pipe are respectively and fixedly connected with two ends of the sand bags, one end of the grouting pipe is a closed end, the other end of the grouting pipe is provided with a grouting hole, one end of the grouting pipe, which is provided with a grouting port, extends out of the sand bags, the grouting pipe is uniformly provided with the grouting holes, and the aperture of the grouting hole is smaller than the particle size of the gravels;
a positioning disc is sleeved on the grouting pipe, the cross section of the positioning disc is circular, the outer wall of the positioning disc is in contact with the inner wall of the sand bag, through holes for water permeation are uniformly distributed in the positioning disc, and the aperture of each through hole is larger than the particle size of the sand;
the positioning disk has a plurality of to along the length direction evenly distributed of slip casting pipe, a plurality of spacing rings of slip casting pipe along self length direction fixedly connected with, the spacing ring diameter on the slip casting pipe increases along the length direction of slip casting pipe gradually, and the spacing ring that the diameter is the biggest is close to the blind end of slip casting pipe, the internal diameter of positioning disk increases gradually, the positioning disk is corresponding with the spacing ring to positioning disk and spacing ring butt.
By adopting the technical scheme, when the grouting pipe is arranged in the sand bag, the positioning disc is sleeved on the grouting pipe, and the outer wall of the positioning disc is in contact with the inner wall of the sand bag, so that the positioning disc has a positioning effect on the grouting pipe, and the grouting pipe can be better arranged in the middle of the sand bag in a vertical state; when the sand bag is installed in the sand well, the grouting opening of the grouting pipe is positioned outside the sand well;
the positioning disc with the large inner diameter corresponds to the limiting ring with the large diameter, when the positioning disc is installed, the positioning disc slides into the grouting pipe according to the sequence of the inner diameters from large to small, so that the positioning disc is sequentially installed on the grouting pipe, the positioning disc can play a certain role in separating sand stones in the sand bag, when the sand bag is installed in a sand well, the gap between the sand stones below the sand bag can be reduced to be far smaller than the gap between the sand stones above the sand bag, and the gap between the sand stones can be better drained;
after the ground base drainage, with grout follow slip casting mouth pouring into in the slip casting pipe, grout flows in the clearance between the grit through the injected hole to in the through-hole of clearance inflow positioning disk through the grit, thereby make the through-hole of clearance between the grit and positioning disk all filled by grout, formed the water proof dish after the through-hole of positioning disk is filled, can further block the circumstances of rivers. And the cement paste fills the grouting pipe, so that the vertical drainage channel loses the drainage function, and the problem of post-construction settlement is solved.
Preferably, the positioning disc is distributed with flow guide channels, the through holes are communicated with each other through the flow guide channels, and one ends of the flow guide channels are communicated with the grouting holes.
Through adopting above-mentioned technical scheme, when grout pours into the slip casting intraductal, grout can more fully flow in the positioning disk through the water conservancy diversion passageway, makes the through-hole can be full of more fast, makes the positioning disk can be filled more fast, and then cuts off water.
Preferably, the vertical section of the flow guide channel is circular, the inner diameter of the flow guide channel is smaller than the particle size of sand, a gap is formed in the circumferential direction of the flow guide channel, and the gap penetrates through the surface of the positioning plate.
Through adopting above-mentioned technical scheme, when the water conservancy diversion passageway was poured the cement thick liquids, partly cement thick liquids can spill over outside the water conservancy diversion passageway through the breach to fill near through-hole and grit clearance, thereby make the grout can more be filled fully in the clearance between through-hole or grit.
Preferably, the outer wall of the grouting pipe close to the closed end is sleeved with a fixing ring, and the closed end of the sand bag is fixed between the inner wall of the fixing ring and the outer wall of the grouting pipe.
Through adopting above-mentioned technical scheme, when solid fixed ring can link together sand bag and slip casting pipe, can also make the slip casting pipe install the middle part department at the sand bag betterly.
Preferably, a binding rope is connected between one end of the sand bag close to the grouting opening and the grouting pipe.
Through adopting above-mentioned technical scheme, bind sand bag and slip casting pipe together through the bundle rope, after the sand bag was installed in the sand shaft, can also untie the bundle rope and continue to add the grit to the sand bag, make the sand bag can be more abundant by the grit filling.
Preferably, the grouting opening is plugged with a sealing cover.
Through adopting above-mentioned technical scheme, form vertical drainage channel when the sand bag and carry out the drainage messenger, through the closing cap, make the intraductal cavity of slip casting keep the hollow state better.
Preferably, still including the supporting component who is used for supporting the slip casting pipe, supporting component includes the bracing piece of lantern ring and equipartition lantern ring week side, the lantern ring cup joints with the portion that the slip casting pipe extends out the sand bag.
Through adopting above-mentioned technical scheme, when the sand bag was installed in the sand well, the lantern ring cup jointed on the slip casting pipe, and the one end of bracing piece is pegged graft on the ground, can make slip casting pipe and sand bag that expose outside the ground keep vertical state better.
In a second aspect, the present application provides a drainage method for foundation stabilization, which adopts the following technical solutions:
comprises the following steps of (a) carrying out,
s1, positioning a tool, wherein the device adopts a crawler arm frame conduit type pile driver;
s2, driving in a sleeve;
s3, before the sand bag is filled with sand, firstly, the closed end of the grouting pipe extends into one end of the sand bag, and then the fixing ring is sleeved into the closed end of the grouting pipe, so that one end of the sand bag is fixed between the fixing ring and the grouting pipe;
s4, in the process of filling the gravel, when the gravel filled in the sand bag is close to the limiting ring, the positioning disc slides into the grouting pipe, and the positioning disc slides into the grouting pipe according to the sequence of the inner diameter from large to small;
s5, after the sand bag is filled with the sand stone, the sand bag is bound on the periphery of the grouting pipe by a binding rope, and the grouting opening is blocked by a sealing cover;
s6, after one end of the sand bag connected with the fixing ring is sent into the sleeve, the sleeve is slowly pulled out, and part of the sand bag and one end of the grouting pipe with a grouting opening are exposed out of the foundation;
s7, sleeving the lantern ring on the periphery of the grouting pipe, and inserting one end of the supporting rod into the surface of the foundation;
s8, the sand bags form a vertical drainage channel, and water in the foundation is discharged outside the foundation outwards through the sand holes of the sand bags under the pressure;
s9, after foundation drainage is finished, firstly pulling the sealing cover away from the grouting pipe, injecting cement slurry into the grouting pipe from the grouting port, wherein after the cement slurry enters the grouting pipe, the cement slurry flows into gaps among the gravels through the grouting holes and enters through holes of the positioning plate through the flow guide channel, the cement slurry fills the gaps among the gravels and the through holes, and finally the grouting pipe is filled;
and S10, after the cement paste grouting is finished, pulling the lantern ring and the supporting rod away from the grouting pipe.
By adopting the technical scheme, in the process of filling the gravel, the position of the limiting ring can be found through the sand bag, so that the position close to the limiting ring can be determined when the gravel is filled, then the positioning disc slides onto the grouting pipe, the positioning disc with large outer diameter can sequentially pass through the limiting rings with small diameter, the positioning disc does not continuously slide down until the positioning disc slides to the corresponding limiting ring, the outer wall of the positioning disc is in mutual contact with the inner wall of the sand bag, and the positioning disc plays a positioning role on the grouting pipe;
after cement slurry is injected into the grouting pipe, the cement slurry is filled in the through hole of the positioning plate, so that the positioning plate can separate water, the cement slurry is filled in the gap between the gravels, and when the cement slurry is solidified in the gap between the gravels, the vertical drainage channel loses the drainage effect, so that the problem of post-construction settlement is solved.
In summary, the present application includes at least one of the following benefits:
1. the grouting pipe is arranged in the sand bag, cement paste is injected into the grouting pipe after the drainage of the foundation is finished, and the cement paste is filled in the gaps among the sand and stones, the through holes of the positioning disc and the grouting pipe, so that the vertical drainage channel loses the drainage function, and the problem of post-construction settlement is solved;
2. the positioning disk is installed in the slip casting pipe, can play the positioning action to the slip casting pipe, make the slip casting pipe stably keep the middle part position at the sand bag, the positioning disk can also play certain separation effect to the grit in the sand bag, install the in-process in the sand well when the sand bag, grit in the sand bag is separated into a plurality of, make the difficult clearance undersize that appears between the grit of sand bag one end in the sand bag, and the great condition in grit clearance of the sand bag other end, make the sand bag can drain off water better when the drainage, when grout pours into the slip casting pipe into, the positioning disk is filled by grout and forms better water proof effect.
Drawings
FIG. 1 is a schematic view of a sandbag installed in a foundation;
FIG. 2 is a schematic view showing the state where the grout pipe of the present embodiment is installed in the sandbag;
FIG. 3 is a schematic view showing the detailed structure of the grouting pipe and the positioning plate according to the embodiment;
FIG. 4 is a schematic view of the overall structure of the positioning plate of the present embodiment;
FIG. 5 is a schematic view showing the state where the fixing ring and the tying string are installed on the sand bag in this embodiment;
fig. 6 is a schematic view of the supporting assembly of the present embodiment in a state of supporting the grouting pipe.
Description of reference numerals: 1. a foundation; 2. a sand bag; 3. a sand well; 4. a grouting pipe; 41. a closed end; 42. a grouting port; 421. sealing the cover; 43. a limiting ring; 44. grouting holes; 5. positioning a plate; 51. a through hole; 52. a flow guide channel; 6. a fixing ring; 7. bundling the ropes; 8. a collar; 9. a support rod.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses a drainage structures for ground reinforcement. Referring to fig. 1, the sand bag 2 is applied to a foundation 1 and comprises a sand bag 2 filled with sand and a sand well 3 used for filling the sand bag 2, and the sand bag 2 is arranged in the sand well 3 to form a vertical drainage channel in the foundation 1.
Referring to fig. 2, the sand bag further comprises a grouting pipe 4 installed in the sand bag 2, and two ends of the grouting pipe 4 are respectively fixedly connected with the sand bag 2. The grouting pipe 4 is installed at the middle position of the sand bag 2. The grouting pipe 4 may be a plastic hose. The grouting pipe 4 is of a hollow structure, one end of the grouting pipe 4 is a closed end 41, the other end of the grouting pipe is provided with a grouting opening 42, and a sealing cover 421 is inserted into the grouting opening 42.
Referring to fig. 2, a positioning plate 5 is sleeved on the grouting pipe 4, and the cross section of the positioning plate 5 is circular. When the positioning disc 5 is installed in the sand bag 2, the outer wall of the positioning disc 5 is in contact with the inner wall of the sand bag 2, and the grouting pipe 4 can be better installed in the sand bag 2 in the middle due to the positioning disc 5. The positioning discs 5 are provided with a plurality of positioning discs 5, and the plurality of positioning discs 5 are uniformly distributed along the length direction of the grouting pipe 4. The slip casting pipe 4 is fixedly bonded with a plurality of limiting rings 43 along the length direction of the slip casting pipe, and the cross section of each limiting ring 43 is of a circular structure.
Referring to fig. 3, the diameter of the stop collar 43 on the grouting pipe 4 is gradually increased along the length direction of the grouting pipe 4, and the stop collar 43 with the largest diameter is close to the closed end 41 of the grouting pipe 4. The internal diameter of positioning disk 5 increases gradually, and positioning disk 5 is corresponding with spacing ring 43 to positioning disk 5 and spacing ring 43 butt. When the positioning disc 5 is installed in the sand bag 2 through the grouting pipe 4, the positioning disc 5 plays a certain supporting role for the gravels in the sand bag 2, and when the sand bag 2 enters the sand well 3, the gap between the gravels at the lower end of the sand bag 2 is reduced to be far smaller than the gap between the gravels at the upper end of the sand bag 2, so that the gravels can be better and uniformly filled in the sand bag 2.
Referring to fig. 3, the grouting holes 44 are uniformly distributed on the grouting pipe 4, and the aperture of the grouting hole 44 is smaller than the particle size of the sand. Through holes 51 for water permeation are uniformly distributed on the positioning disc 5, and the diameter of each through hole 51 is larger than the particle size of the sand. The positioning plate 5 is provided with a flow guide channel 52, the through holes 51 are communicated through the flow guide channel 52, and one end of the flow guide channel 52 is also communicated with the grouting hole 44.
Referring to fig. 4, the vertical section of the guide passage 52 is circular, and the inner diameter of the guide passage 52 is smaller than the diameter of sand, so that sand is not easy to enter the guide passage 52. The guide channel 52 has a notch in the circumferential direction, and the notch penetrates through the surface of the positioning disc 5. When the sand bag 2 is installed in the sand well 3, the direction of the gap faces upwards. When grout flows into the positioning plate 5 from the grouting holes 44, part of the grout overflows from the gap, so that the through holes 51 can be filled with the grout more quickly, and the time for forming the water isolating effect of the positioning plate 5 is shortened.
Referring to fig. 3 and 5, the outer wall of the grouting pipe 4 near the closed end 41 is sleeved with a fixing ring 6, and when the grouting pipe 4 is installed in the sand bag 2 and the inner wall of the fixing ring 6 is sleeved with the outer peripheral side of the grouting pipe 4, one end of the sand bag 2 is fixed between the fixing ring 6 and the grouting pipe 4. The fixing ring 6 can enable the grouting pipe 4 to be well installed in the middle of the sand bag 2 to play a certain positioning role.
Referring to fig. 5, one end of the grouting pipe 4 having the grouting opening 42 extends out of the sand bag 2, a binding rope 7 is connected between one end of the sand bag 2 close to the grouting opening 42 and the grouting pipe 4, and the sand bag 2 and the grouting pipe 4 are fixedly connected together through the binding rope 7.
Referring to fig. 6, a support assembly for supporting the grouting pipe 4 in a vertical state is further included, and the support assembly includes a collar 8 and support rods 9 uniformly distributed on the circumferential side of the collar 8. When the sand bag 2 is installed in the sand well 3, the lantern ring 8 and the part of the grouting pipe 4 extending out of the sand bag 2 are sleeved, and one end of the supporting rod 9 is inserted into the surface of the foundation 1. The support component can also play a certain supporting role for the grouting pipe 4 when the grouting pipe 4 is grouted.
The implementation principle of the drainage structure for foundation stabilization is as follows:
after the grouting pipes 4 and the positioning disc 5 are arranged in the sand bag 2, the grouting pipes 4 are positioned in the middle of the sand bag 2, the positioning disc 5 is uniformly distributed in the sand bag 2 along the grouting pipes 4, so that the positioning disc 5 has a positioning effect on the grouting pipes 4, and after the sand bag 2 forms a vertical drainage channel in the foundation 1, water flows out of the foundation 1 through the through holes 51 of the positioning disc 5 and the clearance between gravels;
after the drainage of foundation 1 is finished, grout injection hole 42 to slip casting pipe 4 pours into cement paste, make grout flow into the clearance between the grit through the injected hole 44 of slip casting pipe 4, the cement that injected hole 44 flows out flows into positioning disk 5 along water conservancy diversion passageway 52, clearance between the grit and through-hole 51 on the positioning disk 5 all are filled stifled by grout, slip casting pipe 4 also can be filled by grout at last, make sand bag 2 also can make vertical drainage channel destroyed without being extracted, the problem of having improved the post-construction settlement.
The application also discloses a drainage method for foundation stabilization, which comprises the following steps,
s1, positioning a tool, wherein the device adopts a crawler arm frame conduit type pile driver;
s2, driving in a sleeve;
s3, before the sand bag 2 is filled with sand, firstly, the closed end 41 of the grouting pipe 4 extends into one end of the sand bag 2, and then the fixing ring 6 is sleeved into the closed end 41 of the grouting pipe 4, so that one end of the sand bag 2 is fixed between the fixing ring 6 and the grouting pipe 4;
s4, in the process of filling gravel, when the gravel filled in the sand bag 2 is close to the limiting ring 43 and the positioning disc 5 slides into the grouting pipe 4, the positioning disc 5 slides into the grouting pipe 4 from large to small according to the inner diameter of the positioning disc 5;
s5, after the sand bag 2 is filled with the sand, the sand bag 2 is bound on the periphery of the grouting pipe 4 by the binding rope 7, and the grouting port 42 is blocked by the sealing cover 421;
s6, after one end of the sand bag 2 connected with the fixing ring 6 is sent into the casing, the casing is slowly pulled out, and part of the sand bag 2 and one end of the grouting pipe 4 with the grouting opening 42 are exposed out of the foundation 1;
s7, sleeving the lantern ring 8 on the periphery of the grouting pipe 4, and inserting one end of the supporting rod 9 into the surface of the foundation 1;
s8, the sand bags 2 form a vertical drainage channel, and water in the foundation 1 is discharged outside the foundation 1 through the sand holes of the sand bags 2 under pressure;
s9, after the drainage of the foundation 1 is finished, the sealing cover 421 is pulled out from the grouting pipe 4, cement slurry is injected into the grouting pipe 4 from the grouting opening 42, and after the cement slurry enters the grouting pipe 4, the cement slurry flows into the gap between the gravels through the grouting holes 44 and enters the through holes 51 of the positioning disc 5 through the flow guide channel 52. The cement paste fills the gaps between the gravels and the through holes 51, and finally fills the grouting pipes 4;
and S10, after the cement paste grouting is finished, pulling the lantern ring 8 and the supporting rod 9 away from the grouting pipe 4.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A drainage structures for ground stabilization, including sand bag (2) of irritating grit and be used for installing sand well (3) of sand bag (2), its characterized in that: the sand bag grouting device is characterized by further comprising a grouting pipe (4) arranged in the sand bag (2), wherein the grouting pipe (4) is of a hollow structure, two ends of the grouting pipe (4) are fixedly connected with two ends of the sand bag (2) respectively, one end of the grouting pipe (4) is a closed end (41), the other end of the grouting pipe (4) is provided with a grouting hole (44), one end, provided with a grouting opening (42), of the grouting pipe (4) extends out of the sand bag (2), the grouting hole (44) is uniformly distributed in the grouting pipe (4), and the aperture of the grouting hole (44) is smaller than the particle size of sand;
a positioning disc (5) is sleeved on the grouting pipe (4), the cross section of the positioning disc (5) is circular, the outer wall of the positioning disc (5) is in contact with the inner wall of the sand bag (2), through holes (51) for water permeation are uniformly distributed in the positioning disc (5), and the aperture of each through hole (51) is larger than the particle size of sand;
positioning disk (5) have a plurality of to length direction evenly distributed along slip casting pipe (4), slip casting pipe (4) are along a plurality of spacing rings (43) of length direction fixedly connected with of self, spacing ring (43) diameter on slip casting pipe (4) is crescent along the length direction of slip casting pipe (4), and the biggest spacing ring of diameter (43) is close to blind end (41) of slip casting pipe (4), the internal diameter of positioning disk (5) is crescent, positioning disk (5) are corresponding with spacing ring (43) to positioning disk (5) and spacing ring (43) butt.
2. A drainage structure for foundation reinforcement as set forth in claim 1, wherein: flow guide channels (52) are distributed on the positioning disc (5), the through holes (51) are communicated with each other through the flow guide channels (52), and one ends of the flow guide channels (52) are communicated with the grouting holes (44).
3. A drainage structure for foundation reinforcement as set forth in claim 2, wherein: the vertical section of the flow guide channel (52) is circular, the inner diameter of the flow guide channel (52) is smaller than the particle size of sand, a gap is formed in the circumferential direction of the flow guide channel (52), and the gap penetrates through the surface of the positioning disc (5).
4. A drainage structure for foundation reinforcement as set forth in claim 1, wherein: the outer wall of the grouting pipe (4) close to the closed end (41) is sleeved with a fixing ring (6), and the closed end of the sand bag (2) is fixed between the inner wall of the fixing ring (6) and the outer wall of the grouting pipe (4).
5. A drainage structure for foundation reinforcement as set forth in claim 1, wherein: a binding rope (7) is connected between one end of the sand bag (2) close to the grouting opening (42) and the grouting pipe (4).
6. A drainage structure for foundation reinforcement as set forth in claim 5, wherein: the grouting opening (42) is inserted with a sealing cover (421).
7. A drainage structure for foundation reinforcement as set forth in claim 5, wherein: still including the supporting component who is used for supporting slip casting pipe (4), supporting component includes lantern ring (8) and bracing piece (9) of equipartition lantern ring (8) week side, the portion that extends sand bag (2) with slip casting pipe (4) outside lantern ring (8) cup joints.
8. A drainage method for foundation stabilization is characterized in that: comprises the following steps of (a) carrying out,
s1, positioning a tool, wherein the device adopts a crawler arm frame conduit type pile driver;
s2, driving in a sleeve;
s3, before the sand bag (2) is filled with sand, firstly, the closed end (41) of the grouting pipe (4) extends into one end of the sand bag (2), and then the fixing ring (6) is sleeved into the closed end (41) of the grouting pipe (4), so that one end of the sand bag (2) is fixed between the fixing ring (6) and the grouting pipe (4);
s4, in the process of filling gravel, when the gravel filled in the sand bag (2) is close to the limit ring (43), and the positioning disc (5) slides into the grouting pipe (4), the positioning disc (5) slides into the grouting pipe (4) according to the sequence of the inner diameters from large to small;
s5, after the sand bag (2) is filled with the sand, the sand bag (2) is bound on the periphery of the grouting pipe (4) by a binding rope (7), and the grouting opening (42) is blocked by a sealing cover (421);
s6, after one end of the sand bag (2) connected with the fixing ring (6) is sent into the casing, the casing is slowly pulled out, and part of the sand bag (2) and one end of the grouting pipe (4) with the grouting opening (42) are exposed out of the foundation (1);
s7, sleeving the lantern ring (8) on the periphery of the grouting pipe (4), and inserting one end of the supporting rod (9) into the surface of the foundation (1);
s8, the sand bag (2) forms a vertical drainage channel, and water in the foundation (1) is discharged outside the foundation (1) through the sand hole of the sand bag (2) under pressure;
s9, after the drainage of the foundation (1) is finished, firstly pulling the sealing cover (421) away from the grouting pipe (4), injecting cement slurry into the grouting pipe (4) from the grouting port (42), after the cement slurry enters the grouting pipe (4), enabling the cement slurry to flow into gaps among the gravels through the grouting holes (44) and enter between through holes (51) of the positioning disc (5) through the flow guide channel (52), filling the gaps among the gravels and the through holes (51) by the cement slurry, and finally filling the grouting pipe (4);
s10, after the cement paste grouting is finished, the lantern ring (8) and the supporting rod (9) are pulled away from the grouting pipe (4).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116065564A (en) * | 2023-02-01 | 2023-05-05 | 广东开瑞建设有限公司 | Drainage structure for foundation reinforcement and construction method thereof |
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| CN116065564B (en) * | 2023-02-01 | 2023-09-01 | 广东开瑞建设有限公司 | Drainage structure for foundation reinforcement and construction method thereof |
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