CN116971362A - Building terrace reinforcing and lifting method on shallow gravel soil foundation - Google Patents
Building terrace reinforcing and lifting method on shallow gravel soil foundation Download PDFInfo
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- CN116971362A CN116971362A CN202311221276.8A CN202311221276A CN116971362A CN 116971362 A CN116971362 A CN 116971362A CN 202311221276 A CN202311221276 A CN 202311221276A CN 116971362 A CN116971362 A CN 116971362A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 124
- 239000002689 soil Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000002787 reinforcement Effects 0.000 claims abstract description 38
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 239000011440 grout Substances 0.000 claims 2
- 239000002002 slurry Substances 0.000 abstract description 13
- 238000004062 sedimentation Methods 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 239000003351 stiffener Substances 0.000 description 13
- 239000007787 solid Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
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Abstract
The invention relates to the technical field of building foundation reinforcement and lifting, and provides a building terrace reinforcement and lifting method on a shallow gravel soil foundation, which comprises the following steps: arranging a plurality of adjacent circular grouting areas in an array in a settling area of a terrace of a building; arranging a plurality of grouting hole sites in each circular grouting area; and (3) drilling and grouting through each grouting hole site to form a gyro pile lifting reinforcing body which is integrally in a gyro shape. According to the scheme of the invention, the building terrace on the soft foundation can be reinforced, and after the building terrace is reinforced, the bearing capacity of the factory building terrace can be improved, and the uneven settlement of the factory building terrace is reduced. The top pile lifting reinforcement can uniformly spread the load acting on the terrace into the soil at the lower part of the terrace, so that the load is uniformly distributed in a larger soil range, thereby reducing the stress of the soil and lowering sedimentation; the top pile lifting reinforcing body is formed by grouting in a shallow foundation, so that the damage to the original pile foundation in the deep foundation in the slurry diffusion process is avoided.
Description
Technical Field
The invention relates to the technical field of building foundation reinforcement and lifting, in particular to a building terrace reinforcement and lifting method on a shallow gravel soil foundation.
Background
The soft foundation in coastal area is deep, the shallow layer is gravelly soil foundation, the deep layer is silt soil foundation, the building such as factory building is the large-span frame construction, adopt pile foundation-cushion cap foundation. The indoor terrace area of factory building is big, for economic reasons, shallow layer ground is generally tamped with rubble soil and is handled, but because the local heap of factory building terrace carries too greatly, can produce uneven subsidence, influences normal use. At present, the method for reinforcing and lifting the terrace is to perform grouting reinforcement and lifting on the foundation in a certain depth range of a sedimentation area, the method wastes slurry, the construction efficiency is low, and meanwhile, in the grouting process, the slurry possibly extrudes a pile foundation when being diffused to the depth, so that the original pile foundation is damaged.
Disclosure of Invention
The invention aims to solve at least one technical problem in the background technology and provides a method for reinforcing and lifting a building terrace on a shallow gravelly soil foundation.
In order to achieve the above purpose, the invention provides a method for reinforcing and lifting a building terrace on a shallow gravelly soil foundation, which comprises the following steps:
arranging a plurality of adjacent circular grouting areas in an array in a settling area of a terrace of a building;
arranging a plurality of grouting hole sites in each circular grouting area;
and (3) drilling and grouting through each grouting hole site to form a gyro pile lifting reinforcing body which is integrally in a gyro shape.
According to one aspect of the invention, the grouting holes comprise a central grouting hole and a plurality of edge grouting holes;
the central grouting hole is positioned at the center of the circular grouting area;
the edge grouting holes are mutually spaced, the edge grouting holes are arranged along the periphery of the central grouting hole, and the distances between the edge grouting holes and the central grouting hole are equal.
According to one aspect of the invention, the grouting through the drilling holes of each grouting hole site to form a integrally gyroscopic pile lifting reinforcing body comprises the following steps:
drilling and grouting along the vertical direction through the central grouting hole site to form a pile body reinforcing body;
and drilling and grouting towards the pile body reinforcement through each edge grouting hole position to form an inclined reinforcement body connected with the vertical pile body reinforcement body.
According to one aspect of the invention, the bottom end of each inclined reinforcing body is connected to the side wall of the pile body reinforcing body, and the bottom end of the pile body reinforcing body is deeper than the bottom end of each inclined reinforcing body.
According to one aspect of the invention, the bottom end of the inclined reinforcing body is positioned at the bottom layer of the gravelly soil foundation;
the bottom end of the pile body reinforcing body penetrates through the gravel soil foundation layer to reach the next stratum, and the length of the pile body reinforcing body positioned in the next stratum is larger than or equal to the depth of the gravel soil foundation.
According to one aspect of the invention, the grouting holes are drilled through the grouting holes to form a top pile lifting reinforcing body which is integrally in a top shape, and the method further comprises the following steps:
and shallow supplementary grouting is carried out on the top ends of the pile body reinforcing body and the inclined reinforcing body through the central grouting hole site and the edge grouting hole site, so that a circular plate reinforcing body connected with the pile body reinforcing body and the inclined reinforcing body is formed.
According to one aspect of the invention, the circular plate stiffener covers the shaft stiffener and the inclined stiffener.
The area of the circular plate reinforcing body is equal to the area of the circular grouting area.
According to one aspect of the invention, when drilling and grouting are carried out through the central grouting hole site and the plurality of edge grouting hole sites, a drilling and grouting integrated machine is adopted for drilling and grouting, grouting is carried out downwards in a vertical direction in a plurality of sections, and after the slurry is sprayed out from the orifice of a grouting pipe, the slurry is pressed into surrounding soil and is solidified within 30-60 seconds.
According to one scheme of the invention, the method for reinforcing and lifting the building terrace on the shallow gravelly soil foundation comprises the following steps: arranging a plurality of adjacent circular grouting areas in an array in a settling area of a terrace of a building; arranging a plurality of grouting hole sites in each circular grouting area; and (3) drilling and grouting through each grouting hole site to form a gyroscopic pile lifting reinforcing body which is integrally in a gyroscopic shape. The invention can strengthen the floor of a building (e.g. a factory building) on a soft foundation, and can improve the bearing capacity of the floor of the factory building and reduce the uneven settlement of the floor of the factory building after the floor of the factory building is strengthened. Specifically, the gyro pile lifting reinforcement can uniformly spread the load acting on the terrace into the soil body at the lower part of the terrace, so that the load is uniformly distributed in a larger soil body range, thereby reducing the stress of the soil body and reducing sedimentation; the cone-shaped body part of the reinforcing body is lifted by the top pile, so that the transverse deformation of the gravel soil foundation is restrained, the lateral flow of foundation soil is effectively prevented, and the bearing capacity of the foundation is improved; the top pile lifting reinforcing body is formed by grouting in a shallow foundation, so that the damage to the original pile foundation in the deep foundation in the slurry diffusion process is avoided.
According to one scheme of the invention, a plurality of grouting hole sites are distributed in each circular grouting area, wherein each grouting hole site comprises a central grouting hole site and a plurality of edge grouting hole sites; the central grouting hole site is positioned at the center of the circular grouting area; the edge grouting holes are arranged at intervals, the edge grouting holes are arranged along the periphery of the central grouting hole, and the distances between the edge grouting holes and the central grouting hole are equal. By the arrangement, the grouting reinforcement body can be uniformly lifted to reinforce the sedimentation area during drilling grouting through the central grouting hole site and each edge grouting hole site, so that the structural strength of the lifting reinforcement area and the capability of resisting external force are effectively enhanced.
According to one aspect of the invention, a gyroscopic pile lifting reinforcement body is formed integrally in a gyroscopic shape by drilling and grouting through each grouting hole site, and the gyroscopic pile lifting reinforcement body comprises: drilling and grouting along the vertical direction through the central grouting hole site to form a pile body reinforcing body; and (3) drilling and grouting holes through the edge grouting holes towards the side wall of the pile body reinforcement body to form an inclined reinforcement body connected with the vertical pile body reinforcement body. By the arrangement, each inclined reinforcing body and the pile body reinforcing body positioned in the middle of each inclined reinforcing body form a top-shaped reinforcing body structure, and each inclined reinforcing body forms a conical part reinforcing body structure in the top-shaped reinforcing body structure. In this embodiment, the center grouting hole site and each edge grouting hole site are simultaneously grouting. By the arrangement, pile body reinforcing bodies formed by grouting and conical reinforcing bodies can be better meshed and connected together to form a whole. The cone part of the anchor pile lifting reinforcement body makes the transverse deformation of the gravel soil foundation restrained, and the lateral flow of the foundation soil is effectively prevented.
According to one aspect of the invention, the bottom ends of the inclined reinforcing bodies are connected to the side walls of the pile body reinforcing bodies, and the bottom ends of the pile body reinforcing bodies are deeper than the bottom ends of the inclined reinforcing bodies. The bottom end of the inclined reinforcing body is positioned at the bottom layer of the gravelly soil foundation; the bottom end of the pile body reinforcing body penetrates through the gravel soil foundation layer to reach the next stratum, and the length of the pile body reinforcing body positioned in the next stratum is larger than or equal to the depth of the gravel soil foundation. So set up, can make between pile body add solid and each slope add solid form with the bigger area of contact of foundation soil, form the corner contact moreover, further strengthen the stability of rubble soil foundation, it is stronger to the lateral deformation constraint of rubble soil foundation, effectively stop the lateral flow of foundation soil, improve the ability of resisting external force. Moreover, through the setting of pile body reinforcing body, can make top stake lifting reinforcing body's gesture and position stable, can not take place the skew, guarantee the stability and the reliability of support.
According to one scheme of the invention, the integrally gyroscopic pile lifting reinforcing body is formed by drilling and grouting through each grouting hole site, and the gyroscopic pile lifting reinforcing body further comprises: shallow supplementary grouting is carried out at the top ends of the pile body reinforcing body and the inclined reinforcing body through the central grouting hole site and the edge grouting hole site, so that a circular plate reinforcing body connected with the pile body reinforcing body and the inclined reinforcing body is formed. The circular plate reinforcing body covers the pile body reinforcing body and the inclined reinforcing body. The area of the circular plate reinforcing body is equal to the area of the circular grouting area. So set up, can make continue shallow layer benefit to leak and slip casting on pile body add solid and slope add solid basis, it is closely knit to fill, effectively promotes the structural strength of top stake lifting add solid, improves the lifting and consolidates intensity, guarantees the effect of building terrace reinforcement lifting on the shallow layer rubble soil foundation.
According to one scheme of the invention, when drilling and grouting are carried out through the central grouting hole site and the plurality of edge grouting hole sites, a drilling and grouting integrated machine is adopted for drilling and grouting, grouting is carried out downwards in a vertical direction in multiple stages in sequence, and after the slurry is sprayed out from the orifice of the grouting pipe, the slurry is pressed into surrounding soil and is solidified within 30-60 seconds. So set up, can make the construction high-efficient, the thick liquid solidifies fast moreover, has reduced the softening influence to the soil body, makes rubble soil foundation strength increase, prevents that the building from producing secondary settlement.
According to the scheme of the invention, the building terrace on the soft foundation can be reinforced, and after the building terrace is reinforced, the bearing capacity of the factory building terrace can be improved, and the uneven settlement of the factory building terrace is reduced. The top pile lifting reinforcement can uniformly spread the load acting on the terrace into the soil at the lower part of the terrace, so that the load is uniformly distributed in a larger soil range, thereby reducing the stress of the soil and lowering sedimentation; the cone of the reinforcing body is lifted by the top pile, so that the transverse deformation of the gravel soil foundation is restrained, the lateral flow of foundation soil is effectively prevented, and the bearing capacity of the foundation is improved; the top pile lifting reinforcing body is formed by grouting in a shallow foundation, so that the damage to the original pile foundation in the deep foundation in the slurry diffusion process is avoided.
Drawings
FIG. 1 schematically illustrates a flow chart of a method for reinforcing and lifting a building terrace on a shallow gravel soil foundation according to one embodiment of the invention;
FIG. 2 schematically illustrates a cross-sectional view of a top pile lifting reinforcement foundation according to one embodiment of the present invention;
FIG. 3 schematically illustrates a circular grouting area map of a settling area arrangement of a building floor according to one embodiment of the invention;
FIG. 4 schematically illustrates a top view of the path of a grouting forming peg-top lifting stiffener according to one embodiment of the present invention;
FIG. 5 schematically illustrates a cross-sectional view of a path of a grouting forming peg-top lifting stiffener according to one embodiment of the present invention;
FIG. 6 schematically illustrates a front cross-sectional view of a grouting forming pile body reinforcement and a diagonal reinforcement according to an embodiment of the invention;
FIG. 7 schematically illustrates a top view of a grouting forming pile body stiffener and a diagonal stiffener according to one embodiment of the present invention;
fig. 8 schematically shows a front cross-sectional view of a grouting forming peg-top lifting stiffener according to one embodiment of the present invention.
Detailed Description
The present disclosure will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are merely to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present invention and do not imply any limitation on the scope of the invention.
As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment.
FIG. 1 schematically illustrates a flow chart of a method for reinforcing and lifting a building terrace on a shallow gravel soil foundation according to one embodiment of the invention; figure 2 schematically illustrates a cross-sectional view of a peg-top lifting stiffening body foundation according to an embodiment of the invention. As shown in fig. 1 and 2, in the present embodiment, a method for reinforcing and lifting a building terrace on a shallow gravel soil foundation includes:
a. arranging a plurality of adjacent circular grouting areas in an array in a settling area of a terrace of a building;
b. arranging a plurality of grouting hole sites in each circular grouting area;
c. and (3) drilling and grouting through each grouting hole site to form a gyroscopic pile lifting reinforcing body which is integrally in a gyroscopic shape.
According to the scheme, the invention can strengthen the floor of a building (e.g. a factory building) on a soft foundation, and after the floor of the factory building is strengthened, the bearing capacity of the floor of the factory building can be improved, and uneven settlement of the floor of the factory building is reduced. Specifically, the gyroscopic pile lifting reinforcing body 10 can uniformly diffuse the load acting on the terrace into the soil body at the lower part of the terrace, so that the load is uniformly distributed in a larger soil body range, thereby reducing the stress of the soil body and reducing sedimentation; the cone-shaped body part of the reinforcing body is lifted by the top pile, so that the transverse deformation of the gravel soil foundation is restrained, the lateral flow of foundation soil is effectively prevented, and the bearing capacity of the foundation is improved; the top pile lifting reinforcing body is formed by grouting in a shallow foundation, so that the damage to the original pile foundation in the deep foundation in the slurry diffusion process is avoided.
Further, fig. 3 schematically shows a circular grouting area diagram of a settling area arrangement of a floor of a building according to an embodiment of the present invention. As shown in fig. 3, in the present embodiment, a plurality of grouting holes are arranged in each circular grouting area 1, and the grouting holes include a central grouting hole 2 and a plurality of edge grouting holes 3;
the central grouting hole sites 2 are positioned at the circle center of the circular grouting area 1, and the distance between the central grouting hole sites 2 is about 9 m-12 m;
the edge grouting holes 3 are arranged at intervals, the edge grouting holes 3 are arranged along the periphery of the central grouting hole 2, and the distances between the edge grouting holes 3 and the central grouting hole 2 are equal. By the arrangement, the grouting reinforcement body can be uniformly lifted to reinforce the sedimentation area when drilling grouting through the central grouting hole site 2 and the edge grouting hole sites 3, so that the structural strength of the lifting reinforcement area and the capability of resisting external force are effectively enhanced.
Further, fig. 4 schematically shows a top view of the path of the grouting forming peg-top lifting stiffener according to one embodiment of the present invention; FIG. 5 schematically illustrates a cross-sectional view of a path of a grouting forming peg-top lifting stiffener according to one embodiment of the present invention; FIG. 6 schematically illustrates a front cross-sectional view of a grouting forming pile body reinforcement and a diagonal reinforcement according to an embodiment of the invention; FIG. 7 schematically illustrates a top view of a grouting forming pile body stiffener and a diagonal stiffener according to one embodiment of the present invention; fig. 8 schematically shows a front cross-sectional view of a grouting forming peg-top lifting stiffener according to one embodiment of the present invention. As shown in fig. 4 to 8, in the present embodiment, a peg-top lifting reinforcement body 10 having a peg-top shape as a whole is formed by drilling and grouting through each grouting hole, and includes:
drilling and grouting along the vertical direction through the central grouting hole site 2 to form a pile body reinforcing body 4;
and (3) drilling and grouting towards the side wall of the pile body reinforcement body 4 through each edge grouting hole site 3 to form an inclined reinforcement body 5 connected with the vertical pile body reinforcement body. By this arrangement, each inclined reinforcing body 5 and the pile body reinforcing body 4 located in the middle of each inclined reinforcing body 5 can be made to form a gyro-shaped reinforcing body structure, and each inclined reinforcing body 5 forms a tapered portion reinforcing body structure in the gyro-shaped reinforcing body structure. In the present embodiment, the center grouting hole 2 and each of the edge grouting holes 3 are simultaneously grouting. By the arrangement, pile body reinforcing bodies formed by grouting and inclined reinforcing bodies can be better engaged and connected together to form a whole. The cone part of the anchor pile lifting reinforcement body makes the transverse deformation of the gravel soil foundation restrained, and the lateral flow of the foundation soil is effectively prevented.
Further, as shown in fig. 6 and 8, in the present embodiment, the bottom end of each inclined reinforcing body 5 is connected to the side wall of the pile body reinforcing body 4, and the depth of the bottom end of the pile body reinforcing body 4 is deeper than the depth of the bottom end of each inclined reinforcing body 5. In the present embodiment, the bottom end of the inclined reinforcing body 5 is positioned at the bottom layer of the gravel soil foundation; the bottom end of the pile body reinforcing body 4 passes through the gravel soil foundation layer to reach the next stratum, and the length of the pile body reinforcing body 4 positioned in the next stratum is greater than or equal to the depth of the gravel soil foundation. So set up, can make between pile body add solid 4 and each slope add solid 5 form with the bigger area of contact of foundation soil, form the corner contact moreover, further strengthen the stability of rubble soil foundation, it is stronger to the lateral deformation constraint of rubble soil foundation, effectively stop the lateral flow of foundation soil, improve the ability of resisting external force. Moreover, through the setting of pile body reinforcing body 4, can make top stake lifting reinforcing body's gesture and position stable, can not take place the skew, guarantee the stability and the reliability of support.
Further, as shown in fig. 8, in the present embodiment, a peg-top pile lifting reinforcement body having a peg-top shape as a whole is formed by drilling and grouting through each grouting hole site, and the method further includes:
shallow supplementary grouting is carried out at the top ends of the pile body reinforcing body 4 and the inclined reinforcing body 5 through the central grouting hole site 2 and the edge grouting hole site 3, so as to form a circular plate reinforcing body 6 connected with the pile body reinforcing body and the inclined reinforcing body.
Further, as shown in fig. 3, in the present embodiment, a circular plate reinforcing body 6 covers the pile body reinforcing body 4 and the inclined reinforcing body 5.
The area of the circular plate reinforcing body 6 is equal to the area of the circular grouting area 1.
So set up, can make continue shallow layer benefit to leak and slip casting on pile body add solid 4 and slope add solid 5's basis, it is closely knit to fill, effectively promotes the structural strength of top stake lifting add solid 10, improves the lifting and consolidates intensity, guarantees the effect of building terrace reinforcement lifting on the shallow layer rubble soil foundation.
Further, in this embodiment, when drilling and grouting are performed through the central grouting hole site 2 and the plurality of edge grouting hole sites 3, drilling and grouting are performed by using a drilling and grouting integrated machine, grouting is performed in a vertical direction in multiple stages in sequence, and after the slurry is ejected from the orifice of the grouting pipe, the slurry is pressed into surrounding soil and is solidified within 30-60 seconds. So set up, can make the construction high-efficient, the thick liquid solidifies fast moreover, has reduced the softening influence to the soil body, makes rubble soil foundation strength increase, prevents that the building from producing secondary settlement.
According to the scheme provided by the invention, the building terrace on the soft foundation can be reinforced, and after the building terrace is reinforced, the bearing capacity of the factory building terrace can be improved, and the uneven settlement of the factory building terrace is reduced.
According to the scheme, the gyroscopic pile lifting reinforcement can uniformly diffuse the load acting on the terrace into the soil at the lower part of the terrace, so that the load is uniformly distributed in a larger soil range, the stress of the soil is reduced, and the sedimentation is reduced; the cone of the reinforcing body is lifted by the top pile, so that the transverse deformation of the gravel soil foundation is restrained, the lateral flow of foundation soil is effectively prevented, and the bearing capacity of the foundation is improved; the top pile lifting reinforcing body is formed by grouting in a shallow foundation, so that the damage to the original pile foundation in the deep foundation in the slurry diffusion process is avoided.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. The method for reinforcing and lifting the building terrace on the shallow gravel soil foundation is characterized by comprising the following steps of:
arranging a plurality of adjacent circular grouting areas in an array in a settling area of a terrace of a building;
arranging a plurality of grouting hole sites in each circular grouting area;
and (3) drilling and grouting through each grouting hole site to form a gyro pile lifting reinforcing body which is integrally in a gyro shape.
2. The method for reinforcing and lifting the terrace of the building on the shallow gravelly soil foundation according to claim 1, wherein the grouting hole sites comprise a central grouting hole site and a plurality of edge grouting hole sites;
the central grouting hole is positioned at the center of the circular grouting area;
the edge grouting holes are mutually spaced, the edge grouting holes are arranged along the periphery of the central grouting hole, and the distances between the edge grouting holes and the central grouting hole are equal.
3. The method for reinforcing and lifting the terrace of the building on the shallow gravelly soil foundation according to claim 2, wherein the step of forming the integrally gyroscopic pile lifting and reinforcing body through grouting through drilling of each grouting hole site comprises the following steps:
drilling and grouting along the vertical direction through the central grouting hole site to form a pile body reinforcing body;
and drilling and grouting towards the pile body reinforcement through each edge grouting hole position to form an inclined reinforcement body connected with the vertical pile body reinforcement body.
4. A method of lifting a building floor on a shallow gravel foundation according to claim 3, wherein the bottom end of each inclined reinforcing body is connected to the side wall of the pile body reinforcing body, and the depth of the bottom end of the pile body reinforcing body is deeper than the depth of the bottom end of each inclined reinforcing body.
5. A method for reinforcing and lifting a building terrace on a shallow gravelly soil foundation according to claim 3, wherein the bottom end of the inclined reinforcing body is positioned at the bottom layer of the gravelly soil foundation;
the bottom end of the pile body reinforcing body penetrates through the gravel soil foundation layer to reach the next stratum, and the length of the pile body reinforcing body positioned in the next stratum is larger than or equal to the depth of the gravel soil foundation.
6. A method for reinforcing and lifting a building terrace on a shallow gravel soil foundation according to claim 3, wherein the grouting holes are drilled through each grouting hole site to form a gyroscopic pile lifting reinforcing body which is integrally in a gyroscopic shape, and the method further comprises:
and shallow supplementary grouting is carried out on the top ends of the pile body reinforcing body and the inclined reinforcing body through the central grouting hole site and the edge grouting hole site, so that a circular plate reinforcing body connected with the pile body reinforcing body and the inclined reinforcing body is formed.
7. The method for reinforcing and lifting the terrace of a building on a shallow gravelly soil foundation according to claim 6, wherein the circular plate reinforcing body covers the pile body reinforcing body and the inclined reinforcing body;
the area of the circular plate reinforcing body is equal to the area of the circular grouting area.
8. The method for reinforcing and lifting the terrace of a building on a shallow gravelly soil foundation according to any one of claims 2 to 7, wherein when drilling and grouting are carried out through the central grouting hole site and the plurality of edge grouting hole sites, a drilling and grouting integrated machine is adopted to carry out drilling and grouting, grouting is carried out downwards in a vertical direction in a plurality of sections in sequence, and after the grout is sprayed out from the pipe orifice of a grouting pipe, the grout is pressed into surrounding soil and is solidified within 30 to 60 seconds.
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| CN202311221276.8A CN116971362B (en) | 2023-09-21 | 2023-09-21 | Building terrace reinforcing and lifting method on shallow gravel soil foundation |
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| CN202311221276.8A CN116971362B (en) | 2023-09-21 | 2023-09-21 | Building terrace reinforcing and lifting method on shallow gravel soil foundation |
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|---|---|---|---|---|
| CN117349949A (en) * | 2023-12-05 | 2024-01-05 | 北京恒祥宏业基础加固技术有限公司 | Building reinforcement lifting method based on numerical simulation |
| CN117349949B (en) * | 2023-12-05 | 2024-03-08 | 北京恒祥宏业基础加固技术有限公司 | Building reinforcement lifting method based on numerical simulation |
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| CN116971362B (en) | 2023-12-12 |
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