CN113047264A - Air bag hole sealing type cloth bag grouting method - Google Patents
Air bag hole sealing type cloth bag grouting method Download PDFInfo
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- CN113047264A CN113047264A CN202110282004.3A CN202110282004A CN113047264A CN 113047264 A CN113047264 A CN 113047264A CN 202110282004 A CN202110282004 A CN 202110282004A CN 113047264 A CN113047264 A CN 113047264A
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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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Abstract
The invention provides a bag hole sealing type bag grouting method, which is characterized in that a bag with a grout overflow hole is placed in a drill hole, an elastic bag for sealing the drill hole is fixed on a grouting pipe, the elastic bag is connected with an air pump through an air pipe, the grouting pipe is firstly put into a first section of grouting position in the bag before grouting, the air pump is utilized to inflate the elastic bag through an inflation pipe, the outer side wall of the elastic bag is abutted against the inner side wall of the drill hole, the elastic bag is inflated to a certain pressure to seal the drill hole, then grouting is carried out, and cement grout permeates to a foundation through the grout overflow hole in the bag. And (4) deflating the elastic air bag after the first section of grouting is finished, then lifting the grouting pipe, inflating the elastic air bag, starting the second section of grouting, and circulating the process until the whole drilling grouting is finished. The technical scheme provided by the invention has the beneficial effects that: the advantages of cloth bag pile and grouting reinforcement are fully combined, the reinforcement range can be controlled, a good grouting effect is achieved, the formed pile foundation structure can be guaranteed to be a preset reinforcement body, and the cost is low.
Description
Technical Field
The invention relates to the technical field of soft foundation treatment, in particular to an air bag hole sealing type cloth bag grouting method.
Background
When engineering construction is carried out in a soft soil area, foundation treatment is usually carried out, and grouting treatment is a very common soft foundation treatment method and comprises floral tube grouting, cloth bag grouting and the like. The slip casting of the perforated pipe is to put the slip casting pipe into the stratum through the drill hole, and the sectional slip casting process is adopted, so that the grout can uniformly enter the stratum under the pressure condition, and the aim of sectional controllable and uniform diffusion of the grout in the stratum is fulfilled. During grouting, a grouting outer pipe is arranged, the grouting outer pipe is permanently left in a soil body, grout outlets are reserved in the grouting outer pipe at certain intervals, stop valves are additionally arranged at the grout outlets, and during grouting, a grouting inner pipe with a plugging device is placed into the grouting outer pipe to perform grouting on a part needing grouting. Thus, a pile body with a drilled hole as a core is generated in the soil body, and a root reticular pulp vein complex with strong shearing resistance is formed in the soil body crack at the periphery of the pile body. The cloth bag grouting is a soft soil foundation grouting construction process for reinforcing a soil body by forming a similar cylindrical hardened body by geotextile and grouting slurry, the cloth bag has a drainage function so as to accelerate the solidification of the slurry, the slurry can achieve the purpose of compacting the soil body by expanding the cloth bag under the isolation function of the cloth bag, and the cloth bag has high tensile strength and can also play a role of reinforcing the rib so as to increase the stability of the soil body.
In the prior technical scheme, the cost is higher because the outer grouting pipe needs to be left in the soil body; the pile body that sack slip casting formed is the merogenesis, and pile body integrality is relatively poor, and the vertical compressive strength of unipolar is less to the thick liquid can't pour into the soil layer crack in, can't form the netted thick liquid arteries and veins complex body of root in the soil body crack of pile body periphery, and the reinforcement scope is little. Therefore, a grouting method needs to be designed, so that the advantages of floral tube grouting and cloth bag grouting can be integrated, the reinforcing range can be controlled, a good grouting effect can be achieved, and the construction cost can be reduced.
Disclosure of Invention
In view of the above, to solve the above problems, embodiments of the present invention provide an airbag hole sealing type bag grouting method.
The embodiment of the invention provides an air bag hole sealing type cloth bag grouting method, which utilizes an air bag hole sealing type cloth bag grouting device, wherein the air bag hole sealing type cloth bag grouting device comprises a cloth bag, a grouting pipe and an elastic air bag;
the upper end of the cloth bag is open, the lower end of the cloth bag is closed, the lower end of the cloth bag is used for being placed at the bottom of the drill hole, a plurality of slurry overflow holes are formed in the side wall of the cloth bag in a vertically penetrating mode, and the outer side wall of the cloth bag is used for being attached to the side wall of the drill hole; the grouting pipe extends along the vertical direction, the upper end of the grouting pipe is provided with a grouting opening, the lower end of the grouting pipe is provided with a grout outlet so as to form a grouting section, and the grouting section is positioned in the cloth bag; the elastic air bag is arranged in an annular shape, is arranged on the grouting pipe and is positioned at a blocking position above the grouting section, the upper end of the elastic air bag is connected with an inflation pipe, the inflation pipe is used for being connected with an air pump, when the air pump fills air into the elastic air bag through the inflation pipe, the elastic air bag expands after being inflated, and the outer side wall of the elastic air bag abuts against the inner side wall of the drill hole to block the drill hole;
the air bag hole sealing type cloth bag grouting method comprises the following steps:
s1, placing the cloth bag in the drill hole;
s2, mounting the elastic air bag on the grouting pipe and at the blocking position above the grouting section, and extending the grouting pipe into the cloth bag to enable the grouting section to be opposite to the first section grouting position;
s3, inflating the elastic air bag through an inflation tube by using an air pump to enable the outer side wall of the elastic air bag to be abutted against the inner side wall of the drill hole, inflating the elastic air bag to a certain pressure to plug the drill hole, grouting into the grouting tube through a grouting opening, filling the bag below the elastic air bag with grouting slurry, and injecting the grouting slurry into foundation soil around the drill hole through a slurry overflow hole, wherein the first section of grouting is finished;
s4, the elastic air bag is deflated to enable the elastic air bag to contract, the grouting pipe is lifted to enable the grouting section to be opposite to the second section grouting position, the air pump is used for inflating the elastic air bag through the inflation pipe to plug the drilled hole, the second section grouting is started, and the process is sequentially circulated until the whole drilled hole grouting is completed.
Furthermore, the elastic air bag is detachably arranged on the grouting pipe and is switched between the bottom of the grouting pipe and the plugging position; step S1 specifically includes:
the method comprises the steps of installing the elastic air bag at the bottom of the grouting pipe, extending the grouting pipe into a cloth bag, putting the grouting pipe and the cloth bag into a drill hole, inflating the elastic air bag through an inflation pipe by using an air pump, enabling the outer side wall of the elastic air bag to be in seamless contact with the inner side wall of the drill hole, lifting the grouting pipe, enabling the bag body of the cloth bag to be flat and fit with the wall of the drill hole.
Further, the elastic air bag is fixed on the grouting pipe through a nylon rope.
Furthermore, the bottom of the grouting pipe is closed, and the side wall of the lower end of the grouting pipe is circumferentially provided with a plurality of grouting holes to form the grout outlet.
Furthermore, the plurality of slurry overflow holes are arranged at intervals along the circumferential direction of the drilling hole to form slurry overflow hole groups, and the cloth bag is provided with a plurality of groups of slurry overflow hole groups at intervals along the vertical direction.
Further, the aperture of the pulp overflow hole is 6-8 mm; and/or the presence of a gas in the gas,
and an iron ring is fixed on the grout overflow hole for sealing and reinforcing.
Furthermore, the inflation tube is attached to the grouting tube and is bound to the grouting tube.
Furthermore, the elastic air bag is made of rubber; and/or the presence of a gas in the gas,
the material of slip casting pipe is PVC.
Further, the elastic air bag is arranged in a cylindrical shape; and/or the presence of a gas in the gas,
the height of the elastic air bag is 30-50 cm.
Further, the sack is cylindricly set up, and the diameter equals with the drilling diameter.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: through set up evenly distributed's excessive thick liquid hole on the sack, can be convenient pour into the peripheral ground of drilling with the slip casting thick liquid into, enlarge the infiltration scope of slip casting thick liquid, form sack stake pile body after the slip casting thick liquid in the sack solidifies, strengthen the reinforcement stability of whole ground. Through the elastic air bag hole sealing, the cloth bag does not need to be bound on the grouting pipe in a segmented mode, segmented grouting reinforcement can also be achieved, the elastic air bag hole sealing can not only prevent slurry from overflowing a drill hole, but also increase the pressure of the slurry permeating into the surrounding foundation, and therefore the grouting reinforcement range is enlarged. The cloth bag pile body and the grouting slurry injected into the foundation soil jointly play a role in foundation reinforcement, the mechanical strength and the deformation modulus of the soil body are improved, and the reinforcement effect is good. The advantages of floral tube slip casting and traditional sack slip casting have been combined, have solved the problem that the slip casting thick liquid upwelled along the pore wall, can control the reinforcement scope, reach good slip casting effect, can guarantee again that the pile foundation structure that forms is predetermined reinforcement body, and the construction degree of difficulty is little, and is with low costs, has very big spreading value.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an air bag hole sealing type cloth bag grouting device (an elastic air bag is located at a sealing position) provided by the invention;
FIG. 2 is a schematic structural diagram of the bag-in-bag grouting device (for plugging a drilled hole after the elastic bag is inflated) in FIG. 1;
FIG. 3 is a schematic view of a first stage of grouting operation of the air-bag hole-sealing type cloth bag grouting device in FIG. 1;
FIG. 4 is a schematic view of a staged grouting operation of the bag-in-bag grouting apparatus of FIG. 1;
FIG. 5 is a schematic illustration of the effect after grouting of the entire borehole;
fig. 6 is a schematic diagram of the distribution structure of the overflow holes of the cloth bag in fig. 1.
In the figure: 1-cloth bag; 2-slurry overflow hole; 3, drilling; 4-elastic air bag; 5, grouting pipes; 6-nylon ropes; 7, inflating a pipe; 8-grouting holes; 9-bag pile body; 10-slurry penetration range.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 6, an embodiment of the present invention provides an airbag hole-sealed cloth bag grouting apparatus, including a cloth bag 1, a grouting pipe 5, and an elastic airbag 4.
The cloth bag 1 is provided with an opening at the upper end and a closed lower end, the lower end of the cloth bag 1 is used for being placed at the bottom of the drill hole 3, a plurality of slurry overflow holes 2 are arranged on the side wall of the cloth bag 1 in a vertically penetrating mode, and the outer side wall of the cloth bag 1 is used for being attached to the side wall of the drill hole 3. Specifically, the plurality of grout overflow holes 2 are arranged at intervals along the circumferential direction of the drilling hole 3 to form a grout overflow hole group, and the plurality of grout overflow holes 2 are used for guiding partial grouting grout in the cloth bag 1 to permeate into the foundation to be reinforced. The cloth bag 1 is provided with a plurality of slurry overflow hole groups at intervals along the up-down direction, the interval between two adjacent slurry overflow hole groups is 400-500mm, the interval between two adjacent slurry overflow holes 2 in the same group is 300-600mm, the aperture of each slurry overflow hole 2 is 6-8mm, the hole distance can be determined according to the condition of the stratum to be grouted and the grouting reinforcement design standard, and grouting slurry can uniformly permeate into the foundation to be reinforced. The grout overflow holes 2 are fixedly provided with iron rings for sealing and reinforcing, and can protect the cloth bag 1 to increase the durability.
The cloth bag 1 is a flexible woven structure used for wrapping grouting slurry, and friction force between the cloth bag 1 and the side wall of the drill hole 3 can be increased. In order to enable the cloth bag 1 to be matched with the drilled holes 3, the cloth bag 1 is arranged in a cylindrical shape, and the diameter of the cloth bag is equal to that of the drilled holes 3. In order to prevent the cloth bag 1 from falling into the drill hole 3, the length of the cloth bag 1 is 0.6-0.8m greater than the depth of the drill hole 3.
The grouting pipe 5 extends up and down, the upper end of the grouting pipe is provided with a grouting opening, the lower end of the grouting pipe is provided with a grout outlet so as to form a grouting section, and the grouting section is positioned in the cloth bag 1. Slip casting pipe 5 can have seted up the slip casting mouth on bottom surface or side, and is concrete, 5 bottoms of slip casting pipe are and seal the setting, and the lower extreme lateral wall winds a plurality of slip casting holes 8 have been seted up to 5 circumference of slip casting pipe, form the grout outlet, the even interval in a plurality of slip casting holes 8 sets up, can flow out from slip casting pipe 5 with higher speed the slip casting thick liquid, makes the slip casting thick liquid permeate in waiting to consolidate the ground from all directions simultaneously. The material of slip casting pipe 5 is PVC, can reduce construction cost, makes the weight of slip casting pipe 5 less simultaneously, is convenient for promote slip casting pipe 5.
Furthermore, the elastic air bag 4 is detachably mounted on the grouting pipe 5, the bottom of the grouting pipe 5 is switched with the plugging position, so that the elastic air bag 4 is conveniently mounted at the bottom of the grouting pipe 5 and then detached and mounted on the grouting pipe 5 above the grouting section. Specifically, the elastic airbag 4 is fixed on the grouting pipe 5 through a nylon rope 6, so that the elastic airbag 4 can be conveniently mounted and dismounted. The distance between the elastic air bag 4 and the bottom surface of the grouting pipe 5 is 20-30cm, so that the grouting height of each section can be ensured. The height of the elastic air bag 4 is 30-50cm, and the tightness of the drilled hole 3 can be guaranteed by inflating the elastic air bag 4. In order to enable the elastic air bag 4 to be matched with the drill hole 3, the elastic air bag 4 is arranged in a cylindrical shape, and the elastic air bag 4 is made of rubber, so that the elasticity of the elastic air bag 4 can be ensured.
The principle of the technical scheme provided by the invention is specifically explained by the following operations:
railway is built on a soft soil foundation in a certain place, and the soft soil foundation needs to be reinforced due to weak bearing capacity and poor stability.
Firstly, drilling a hole 3 in a foundation to be reinforced, and placing a cloth bag 1 in the drilled hole 3. Specifically, the elastic airbag 4 is installed at the bottom of the grouting pipe 5, namely at a position opposite to the grouting section, the grouting pipe 5 extends into the cloth bag 1, the grouting pipe 5 and the cloth bag 1 are placed into the drill hole 3 together, the elastic airbag 4 is inflated through the inflation tube 7 by the air pump, the outer side wall of the elastic airbag 4 is in seamless contact with the inner side wall of the drill hole 3, the grouting pipe 5 is lifted up, the bag body of the cloth bag 1 is flat, the hole wall of the drill hole 3 is attached, and therefore the cloth bag 1 is completely unfolded in the drill hole 3, and later operation is facilitated.
And then the elastic air bag 4 is disassembled and arranged on the grouting pipe 5 and at the blocking position above the grouting section, and the grouting pipe 5 is extended into the cloth bag 1 to enable the grouting section to be opposite to the first section grouting position, wherein the first section grouting position is the bottom of the drilling hole 3 in the embodiment.
Utilize the air pump to aerify in elastic air bag 4 through gas tube 7, make 4 lateral walls of elastic air bag and 3 inside walls offsets of drilling, aerify elastic air bag 4 to certain pressure shutoff drilling 3, through slip casting mouth to slip casting pipe 5 internal slip casting, the slip casting thick liquid is full of the sack 1 of the part below elastic air bag 4 and after the ground foundation soil around the drilling 3 of abundant infiltration entering through overfall hole 2, first section slip casting is accomplished.
The elastic air bag 4 is deflated to enable the elastic air bag 4 to contract, the grouting pipe 5 is lifted to enable the grouting section to be opposite to the second section grouting position, the air pump is used for inflating the elastic air bag 4 through the inflation pipe 7 to plug the drilled hole 3, the second section grouting is started, the grouting length of each section is 0.5-0.75m, the grouting strength is guaranteed, the grouting times are reduced, and the process is sequentially circulated until the grouting of the whole drilled hole 3 is completed.
The grouting slurry in the embodiment is common silicate grouting slurry, the grade is not lower than PO42.5, the water cement ratio is within the range of 0.5-1.0, a certain proportion of water glass can be doped, and the basic performance of the slurry can reach: the viscosity is 30-35', the specific gravity is 1.4-1.5, the water precipitation rate is less than 3%, and the uniaxial compressive strength is more than 2.4-2.8 MPa (age is 7 days).
And (3) solidifying the grouting slurry in the cloth bag 1 to form a cloth bag pile body 9 (shown in figure 5), diffusing and permeating the grouting slurry outwards through the slurry overflow hole 2, wherein the permeation range of the grouting slurry is 10 in figure 5, and completing grouting reinforcement after the grouting slurry in the cloth bag 1 and the grouting slurry permeating into the foundation around the drilling hole 3 are stable. The cloth bag pile body 9 and the grouting slurry permeating into the foundation soil jointly play a role in foundation reinforcement, the mechanical strength and the deformation modulus of the soil body are improved, and the reinforcement effect is good.
According to the technical scheme provided by the invention, the uniformly distributed slurry overflowing holes 2 are formed in the cloth bag 1, so that grouting slurry can be conveniently diffused and permeated into the foundation around the drilling hole 3, the permeation range of the grouting slurry is expanded, the grouting slurry in the cloth bag 1 is solidified to form the cloth bag pile body 9, and the reinforcing stability of the whole foundation is enhanced. Through the hole sealing of the elastic air bag 4, the sectional grouting reinforcement can be realized without binding the cloth bag 1 on the grouting pipe 5 in a sectional manner, and the hole sealing of the elastic air bag 4 can not only prevent the slurry from overflowing the drill hole 3, but also increase the pressure of the slurry permeating to the surrounding foundation so as to expand the grouting reinforcement range. The cloth bag pile body 9 and the grouting slurry permeating into the foundation soil jointly play a role in foundation reinforcement, the mechanical strength and the deformation modulus of the soil body are improved, and the reinforcement effect is good. The method combines the advantages of perforated pipe grouting and traditional cloth bag grouting, solves the problem that grouting slurry upwells along the hole wall, can control the reinforcing range to achieve good grouting effect, can ensure that the formed pile foundation structure is a preset reinforcing body, and has the advantages of small construction difficulty, low cost and great popularization value.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The air bag hole sealing type cloth bag grouting method is characterized in that an air bag hole sealing type cloth bag grouting device is utilized, and the air bag hole sealing type cloth bag grouting device comprises a cloth bag, a grouting pipe and an elastic air bag;
the upper end of the cloth bag is open, the lower end of the cloth bag is closed, the lower end of the cloth bag is used for being placed at the bottom of the drill hole, a plurality of slurry overflow holes are formed in the side wall of the cloth bag in a vertically penetrating mode, and the outer side wall of the cloth bag is used for being attached to the side wall of the drill hole; the grouting pipe extends along the vertical direction, the upper end of the grouting pipe is provided with a grouting opening, the lower end of the grouting pipe is provided with a grout outlet so as to form a grouting section, and the grouting section is positioned in the cloth bag; the elastic air bag is arranged in an annular shape, is arranged on the grouting pipe and is positioned at a blocking position above the grouting section, the upper end of the elastic air bag is connected with an inflation pipe, the inflation pipe is used for being connected with an air pump, when the air pump fills air into the elastic air bag through the inflation pipe, the elastic air bag expands after being inflated, and the outer side wall of the elastic air bag abuts against the inner side wall of the drill hole to block the drill hole;
the air bag hole sealing type cloth bag grouting method comprises the following steps:
s1, placing the cloth bag in the drill hole;
s2, mounting the elastic air bag on the grouting pipe and at the blocking position above the grouting section, and extending the grouting pipe into the cloth bag to enable the grouting section to be opposite to the first section grouting position;
s3, inflating the elastic air bag through an inflation tube by using an air pump to enable the outer side wall of the elastic air bag to be abutted against the inner side wall of the drill hole, inflating the elastic air bag to a certain pressure to plug the drill hole, grouting into the grouting tube through a grouting opening, filling the bag below the elastic air bag with grouting slurry, and injecting the grouting slurry into foundation soil around the drill hole through a slurry overflow hole, wherein the first section of grouting is finished;
s4, the elastic air bag is deflated to enable the elastic air bag to contract, the grouting pipe is lifted to enable the grouting section to be opposite to the second section grouting position, the air pump is used for inflating the elastic air bag through the inflation pipe to plug the drilled hole, the second section grouting is started, and the process is sequentially circulated until the whole drilled hole grouting is completed.
2. The airbag hole-sealing cloth bag grouting method according to claim 1, characterized in that the elastic airbag is detachably mounted on the grouting pipe and is switched between the bottom of the grouting pipe and the sealing position; step S1 specifically includes:
the method comprises the steps of installing the elastic air bag at the bottom of the grouting pipe, extending the grouting pipe into a cloth bag, putting the grouting pipe and the cloth bag into a drill hole, inflating the elastic air bag through an inflation pipe by using an air pump, enabling the outer side wall of the elastic air bag to be in seamless contact with the inner side wall of the drill hole, lifting the grouting pipe, enabling the bag body of the cloth bag to be flat and fit with the wall of the drill hole.
3. The method of air bag hole-sealed cloth bag grouting according to claim 2, characterized in that the elastic air bag is fixed on the grouting pipe by a nylon rope.
4. The airbag hole-sealing type cloth bag grouting method according to claim 1, wherein the bottom of the grouting pipe is arranged in a closed manner, and a plurality of grouting holes are formed in the side wall of the lower end around the circumference of the grouting pipe to form the grout outlet.
5. The airbag hole-sealing cloth bag grouting method as claimed in claim 1, wherein a plurality of the grout holes are arranged at intervals along the circumferential direction of the drilled hole to form a grout hole group, and a plurality of groups of the grout hole groups are arranged at intervals along the vertical direction of the cloth bag.
6. The airbag hole-sealing cloth bag grouting method of claim 1, wherein the aperture of the grout-overflow hole is 6-8 mm; and/or the presence of a gas in the gas,
and an iron ring is fixed on the grout overflow hole for sealing and reinforcing.
7. The method for grouting an air bag hole-sealing type cloth bag according to claim 1, wherein the inflation tube is attached to the grouting tube and is bound to the grouting tube.
8. The method for grouting a hole-sealed cloth bag according to claim 1, wherein the elastic air bag is made of rubber; and/or the presence of a gas in the gas,
the material of slip casting pipe is PVC.
9. The method of claim 1, wherein said elastomeric bladder is cylindrically disposed; and/or the presence of a gas in the gas,
the height of the elastic air bag is 30-50 cm.
10. The method of claim 1, wherein the bag is cylindrically disposed and has a diameter equal to the diameter of the drilled hole.
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| CN202110282004.3A CN113047264A (en) | 2021-03-16 | 2021-03-16 | Air bag hole sealing type cloth bag grouting method |
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| CN202110282004.3A CN113047264A (en) | 2021-03-16 | 2021-03-16 | Air bag hole sealing type cloth bag grouting method |
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| CN113481805A (en) * | 2021-07-08 | 2021-10-08 | 杭州伟业建设集团有限公司 | Grouting head positioning device and using method thereof |
| CN114319331A (en) * | 2022-03-08 | 2022-04-12 | 中国长江三峡集团有限公司 | Construction method of underwater pipe pile type foundation and underwater pipe pile type foundation |
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| CN114562230A (en) * | 2022-03-03 | 2022-05-31 | 辽宁工程技术大学 | Inflatable irregular high-elastic air bag grout stopping device and construction method |
| CN114718100A (en) * | 2022-03-22 | 2022-07-08 | 浙江省建筑设计研究院 | Integrated multi-unit air bag type water-stopping grouting device and water-stopping grouting construction method |
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| CN114319331A (en) * | 2022-03-08 | 2022-04-12 | 中国长江三峡集团有限公司 | Construction method of underwater pipe pile type foundation and underwater pipe pile type foundation |
| CN114718100A (en) * | 2022-03-22 | 2022-07-08 | 浙江省建筑设计研究院 | Integrated multi-unit air bag type water-stopping grouting device and water-stopping grouting construction method |
| CN114718100B (en) * | 2022-03-22 | 2023-11-10 | 浙江省建筑设计研究院 | Water-stop grouting construction method |
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