CN107829423B - Hole sealing structure for reinforcing shallow foundation by grouting method and construction process thereof - Google Patents
Hole sealing structure for reinforcing shallow foundation by grouting method and construction process thereof Download PDFInfo
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- CN107829423B CN107829423B CN201710948332.6A CN201710948332A CN107829423B CN 107829423 B CN107829423 B CN 107829423B CN 201710948332 A CN201710948332 A CN 201710948332A CN 107829423 B CN107829423 B CN 107829423B
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- grouting
- hole sealing
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- foundation
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- 238000007789 sealing Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 46
- 239000004567 concrete Substances 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 25
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011440 grout Substances 0.000 description 17
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000246 remedial effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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 discloses a hole sealing structure for reinforcing a shallow foundation by a grouting method and a construction process thereof, belongs to the field of shallow foundation reinforcement, and aims to solve the problem of unreasonable hole sealing of grouting holes of the shallow foundation. The hole sealing structure comprises a slurry sealing plate, slurry sealing ribs, slurry injecting holes, hole sealing positioning belts and hole sealing concrete, wherein the slurry injecting holes penetrate through the slurry sealing plate and the outdoor slurry sealing plate to be uniformly distributed on two sides of a foundation wall, positioners are fixed on a slurry injecting pipe so as to determine the position of the hole sealing positioning belts, the outdoor slurry sealing plate is linearly arranged along the outer wall of the foundation wall, and the slurry sealing ribs are buried in foundation soil along the outdoor slurry sealing plate. The construction process of the hole sealing structure comprises the steps of preparing in the earlier stage, excavating a foundation trench, drilling holes, installing grouting pipes and sealing holes. The invention has good slurry stopping effect, simple construction, greatly improved bearing capacity and stability of shallow foundation, low construction cost and outstanding economic benefit.
Description
Technical Field
The invention relates to the field of traditional civil shallow foundation reinforcement, in particular to a hole sealing structure for reinforcing a shallow foundation by a grouting method and a construction process thereof.
Background
The traditional folk houses refer to the building without architects which is a significant component in the large family of the building in China and has great historic, cultural and practical values, and the building is unofficial, folk and generation-to-generation continued and is mainly of residential type. However, the research on the safety performance of the traditional civil house structure is relatively few at present, and an important factor affecting the safety performance of the traditional civil house structure is uneven settlement of the foundation. Therefore, how to take effective foundation reinforcement measures is an important premise for improving the safety performance of the traditional civil house structure.
The grouting method is used as an economical and safe common foundation treatment method and is widely applied to practical engineering. However, the conventional local-style dwelling houses often have shallow foundation burial depths, shallow foundation soil often contains sundries such as tree roots and broken bricks, and when the conventional grouting reinforcement technology is directly used for reinforcing the conventional local-style dwelling houses, grout is very easy to seep from the contact parts of the sundries and soil bodies, so that the grouting reinforcement cannot achieve the due effect, and therefore, the direct action of the grouting method is obviously unreasonable to the reinforcement of the conventional local-style dwelling houses. Therefore, when grouting reinforcement is carried out on a shallow foundation, how to reasonably seal grouting hole sites is one of key factors of success and failure of grouting reinforcement of the traditional local foundation.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a hole sealing structure for reinforcing a shallow foundation by a grouting method and a construction process thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
designing a hole sealing structure for reinforcing a shallow foundation by a grouting method, wherein the hole sealing structure comprises a grouting stopping plate, grouting stopping ribs, grouting holes, a hole sealing positioning belt and hole sealing concrete; the slurry stopping plate comprises an indoor slurry stopping plate and an outdoor slurry stopping plate, the outdoor slurry stopping plate is linearly arranged on the foundation along the outer wall of the foundation wall, and the slurry stopping ribs are buried in the foundation below the outdoor slurry stopping plate along the outdoor slurry stopping plate; the grouting holes penetrate through the grouting stopping plates and are uniformly distributed on two sides of the foundation wall, and grouting pipes are sleeved in the grouting holes; the hole sealing locating belt is arranged in a grouting hole around the grouting pipe, hole sealing concrete is poured above the hole sealing locating belt, and a locator fixed on the grouting pipe is arranged below the hole sealing locating belt.
Preferably, the grout stop plate is formed by pouring C20 plain concrete, the indoor grout stop plate is fully distributed indoors, the width of the outdoor grout stop plate is 1.0-1.2 m, and the thickness of the grout stop plate and the grout stop rib is 15-25 mm.
Preferably, the burying depth of the grout stop rib is 500-600 mm.
Preferably, the aperture of the grouting holes is 70-120 mm, and the spacing between the grouting holes is 1.0-2.0 m; the grouting pipe is a hollow steel pipe with the diameter of 20-50 mm.
Preferably, 3 to 4 holes are uniformly formed in the circumferential direction of every 10cm, wherein the holes are formed in the upper 80cm of the bottom of the grouting pipe along the pipe opening direction of the grouting pipe.
Preferably, the hole sealing positioning belt is made of woven bags, and the length of the hole sealing positioning belt is 10-20 mm.
Preferably, the positioner is made of two phi 6 short steel bars, and is welded on the grouting pipe in parallel to determine the position of the hole sealing positioning belt.
Preferably, the hole sealing concrete is C20 plain concrete, and the pouring length of the hole sealing concrete is 50-60 mm.
Compared with the prior art, the invention has the beneficial technical effects that:
1. The invention has strong adaptability to soil, can be used for shallow foundations formed by any soil of mixed filled soil, artificial filled soil, sand soil, silty soil and cohesive soil, has low cost because the used raw materials are common building materials, does not need complex mechanical equipment, has high applicability, can meet the hole sealing requirement of the grouting method for reinforcing the foundations, has obvious grouting stopping effect and provides effective guarantee for reinforcing the shallow foundations.
2. The grouting holes are uniformly distributed on two sides of the foundation wall, the structural design is reasonable, the grouting stopping effect is obvious, and the bearing capacity and the stability of the shallow foundation are remarkably improved.
3. The outdoor slurry-stopping plate can be used for house water dispersion at the same time, and the indoor slurry-stopping plate can be used for an indoor terrace at the same time, so that the outdoor slurry-stopping plate has various purposes and low manufacturing cost and has good economic and social benefits.
The invention also discloses a construction process of the hole sealing structure for reinforcing the shallow foundation by the grouting method, which comprises the following steps,
(1) Leveling a field, cleaning a working surface, and preparing related materials and equipment;
(2) Foundation trench excavation: the dimensions of the outdoor slurry stopping plate, the indoor slurry stopping plate and the slurry stopping ribs are designed according to the requirements, a foundation trench is excavated, and floating soil on the foundation is cleaned;
(3) Drilling: adopting different drilling machines to match holes, and ensuring the grouting holes to be vertical;
(4) Mounting grouting pipe
A. Uniformly punching 3-4 holes at intervals of 10cm circumferentially along the pipe orifice direction of the grouting pipe, wherein 80cm upwards is arranged at the bottom of the grouting pipe;
b. fixing a positioner on a grouting pipe, placing the grouting pipe into a grouting hole, and enabling the grouting pipe to extend out of the grouting hole to seal at least 20cm;
(5) Hole sealing
A. Setting a hole sealing positioning belt between the grouting holes and the grouting pipe according to the position of the positioner;
b. According to the pre-designed size and position, the pre-prepared C20 plain concrete is used for pouring hole sealing concrete, grouting ribs, an outdoor grouting stopping plate and an indoor grouting stopping plate in sequence, and grouting hole sealing is carried out after curing is carried out for 24 hours.
Preferably, the construction process is applicable to reinforcement of shallow foundations composed of any one of a hybrid fill, an artificial fill, a sand, a silt, and a cohesive soil.
Compared with the prior art, the invention has the beneficial technical effects that:
1. The construction method has the advantages of simple construction process, convenient operation, high construction efficiency, short construction period and low cost, is particularly suitable for reinforcing the shallow foundation formed by any soil of mixed filled soil, artificial filled soil, sand soil, silt soil and cohesive soil, and obviously improves the bearing capacity and stability of the shallow foundation.
2. The invention can effectively perform anti-seepage, plugging and stable remedial measures on the foundation of the traditional shallow residential building, improves the safety of the traditional residential building, prolongs the service life of the traditional residential building, and has good economic and social benefits.
Drawings
FIG. 1 is a schematic diagram of the distribution of grouting holes in the present invention;
FIG. 2 is a schematic cross-sectional structure of a grouting hole;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2 a;
FIG. 4 is a schematic diagram of the structure of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a section B-B of FIG. 4;
The grouting device comprises a grouting hole (1), a grouting pipe (2), an indoor grouting stop plate (3), a foundation wall (4), an outdoor grouting stop plate (5), a grouting stop rib (6), a foundation (7), 8, hole sealing concrete, 9, a hole sealing positioning belt, 10 and a positioner.
Detailed Description
The following examples are given to illustrate the invention in detail, but are not intended to limit the scope of the invention in any way. The mechanical devices referred to in the following examples are conventional devices unless otherwise specified.
Example 1
The grouting reinforcement hole sealing structure suitable for the traditional shallow residential foundation formed by any one of mixed filled soil, artificial filled soil, sand, silt soil and cohesive soil, as shown in fig. 1 to 6, comprises an outdoor grouting stop plate 5, an indoor grouting stop plate 3, grouting stop ribs 6, grouting holes 1, hole sealing positioning belts 9 and hole sealing concrete 8.
The outdoor grout stop plate 5 is linearly arranged on the foundation 7 along the outer wall of the foundation wall body 4, the indoor grout stop plate 3 is fully distributed indoors, and the grout stop ribs 6 are buried in the foundation 7 below the outdoor grout stop plate 5 along the outdoor grout stop plate 5; the grouting holes 1 penetrate through the grouting stop plate and are uniformly distributed in the foundations 7 on two sides of the foundation wall body 4 at intervals of 1.0-2.0 m, the aperture of each grouting hole 1 is 70-120 mm, grouting pipes 2 are sleeved in each grouting hole 1, each grouting pipe 2 is a hollow steel pipe with the diameter of 20-50 mm, 4 holes are uniformly punched at intervals of 10cm circumferentially along the pipe opening direction of each grouting pipe 2 in the upward direction of 80cm at the bottom of each grouting pipe 2, and the grouting pipes 2 extend out of the grouting holes 1 to seal at least 20cm.
The hole sealing locating belt 9 is arranged in the grouting holes 1 around the grouting pipe 2, and the hole sealing locating belt 9 is made of woven bags and has the length of 10-20 mm. Hole sealing concrete 8 is poured above the hole sealing locating belt 9, a locator 10 used for determining the position of the hole sealing locating belt 9 is arranged at the lower end of the hole sealing locating belt 9, and the locator 10 is fixed on the grouting pipe 2.
In this embodiment, the positioner 10 is made of two Φ6 short steel bars, welded in parallel to the grouting pipe 2, and used for determining the position of the hole sealing positioning belt 9.
The hole sealing concrete 8 is C20 plain concrete, and the pouring length of the hole sealing concrete 8 in the grouting holes 1 is 50-60 mm.
In order to increase the application of the slurry stopping plate and reduce the construction cost, the outdoor slurry stopping plate 5 is used as house water scattering at the same time, and the indoor slurry stopping plate 3 is used as an indoor terrace at the same time in the embodiment. The slurry stopping plate is formed by casting C20 plain concrete, the thickness of the slurry stopping plate is 15-25 mm, and the width of the outdoor slurry stopping plate 5 is 1.0-1.2 m.
In order to further strengthen the foundation 7, the thickness of the grout stop rib 6 is set to 15 to 25mm, and the depth of embedding in the foundation 7 is 500 to 600mm. The structure device can effectively realize the reinforcement of shallow foundations, reasonably seal grouting hole sites, improve the safety of the traditional house structure of the house, and save raw materials.
Example 2
A construction process of a hole sealing structure for reinforcing a shallow foundation by a grouting method comprises the following steps:
(1) Early preparation: leveling a site, cleaning a working surface, preparing a C20 plain concrete raw material, a grouting pipe 2, a hole sealing positioning belt 9, a concrete mixer, a small pneumatic drilling machine and a Luoyang shovel, and selecting a reasonable position beside a reinforced site to place the materials and equipment;
(2) Foundation trench excavation: according to the pre-designed dimensions of the outdoor slurry stopping plate 5, the indoor slurry stopping plate 3 and the slurry stopping ribs 6, foundation trench digging is carried out, and floating soil on a foundation is carefully cleaned after trench digging is completed;
(3) Drilling: sequentially adopting a small pneumatic drilling machine and a Luoyang shovel to drill holes in a matching way according to the space of 1.0-2.0 m and the aperture of 70-120 mm, wherein the depth of the small pneumatic drilling machine is 1-1.2 m, and the drilling depth of the Luoyang shovel is 2.5-3 m, so that the grouting holes 1 are ensured to be vertical during drilling;
(4) Mounting grouting pipe 2
Uniformly punching 3-4 holes at intervals of 10cm circumferentially along the pipe orifice upwards by 80cm along the pipe orifice direction of the grouting pipe 2, then welding the positioner 10 on the grouting pipe 2 in parallel, putting the grouting pipe 2 into the grouting hole 1, and enabling the grouting pipe 2 to extend out of the sealing position of the grouting hole 1 by at least 20cm;
(5) Hole sealing
A. According to the position of the hole sealing positioning belt 9 defined by the upper positioner 10, arranging the hole sealing positioning belt 9 between the grouting holes 1 and the grouting pipe 2;
b. According to the pre-designed size and position, the pre-prepared C20 plain concrete is utilized to pour the hole sealing concrete 8, the grouting stop rib 6, the outdoor grouting stop plate 5 and the indoor grouting stop plate 3 in sequence, grouting hole sealing is carried out after 24h of curing, and grouting pressure is controlled to be not more than 0.3MPa during grouting.
In the embodiment, after the outdoor grout stop plate 5 is poured, cement mortar is leveled and the slope is laid for 3 to 5 percent to be used as house water dispersion; the indoor grout stop plate 3 is used as an indoor terrace at the same time, and grout stop ribs 6 are not arranged below the indoor grout stop plate 3.
The grouting method for reinforcing the shallow foundation hole sealing structure and the construction process thereof have the advantages of simple structure, simple and convenient construction and short construction period, can effectively perform anti-seepage, plugging and stable remedial measures on the conventional shallow house foundation, improve the safety of the conventional residential house, and prolong the service life of the conventional residential house.
While the present invention has been described in detail with reference to the drawings and the embodiments, those skilled in the art will understand that various specific parameters in the above embodiments may be changed without departing from the spirit of the invention, and a plurality of specific embodiments are all common variation ranges of the present invention and will not be described in detail herein.
Claims (2)
1. A construction process of a hole sealing structure for reinforcing a shallow foundation by a grouting method is used for reinforcing a traditional local-style shallow foundation and is characterized by comprising the following steps of,
(1) Leveling a field, cleaning a working surface, and preparing related materials and equipment;
(2) Foundation trench excavation: excavating a foundation trench according to the preset dimensions of an outdoor slurry stopping plate, an indoor slurry stopping plate and slurry stopping ribs, and cleaning floating soil on the foundation;
(3) Drilling: adopting different drilling machines to match holes, and ensuring the grouting holes to be vertical;
(4) Mounting grouting pipe
A. Uniformly punching 3-4 holes at intervals of 10cm circumferentially along the pipe orifice direction of the grouting pipe, wherein 80cm upwards is arranged at the bottom of the grouting pipe;
b. fixing a positioner on a grouting pipe, placing the grouting pipe into a grouting hole, and enabling the grouting pipe to extend out of the grouting hole to seal at least 20cm;
(5) Hole sealing
A. Setting a hole sealing positioning belt between the grouting holes and the grouting pipe according to the position of the positioner;
b. According to the pre-designed size and position, sequentially pouring hole sealing concrete, slurry stopping ribs, an outdoor slurry stopping plate and an indoor slurry stopping plate with pre-prepared C20 plain concrete, curing for 24 hours, and grouting and hole sealing;
Forming a preset hole sealing structure according to the construction process from the step (1) to the step (4), wherein the hole sealing structure comprises a slurry stopping plate, a slurry stopping rib, a slurry injecting hole, a hole sealing positioning belt and hole sealing concrete; the slurry stopping plate comprises an indoor slurry stopping plate and an outdoor slurry stopping plate, the outdoor slurry stopping plate is linearly arranged on the foundation along the outer wall of the foundation wall, and the slurry stopping ribs are buried in the foundation below the outdoor slurry stopping plate along the outdoor slurry stopping plate; the grouting holes penetrate through the grouting stopping plates and are uniformly distributed on two sides of the foundation wall, and grouting pipes are sleeved in the grouting holes; the grouting device comprises a grouting pipe, a hole sealing locating belt, a grouting hole aperture, a grouting hole spacing, a grouting hole positioning belt, a grouting hole positioning device and a grouting hole, wherein the hole sealing locating belt is arranged in grouting holes around the grouting pipe, the hole sealing concrete is poured above the hole sealing locating belt, a positioner fixed on the grouting pipe is arranged below the hole sealing locating belt, the grouting hole is fully covered with the indoor grouting stopping plate, the width of the outdoor grouting stopping plate is 1.0-1.2 m, the thicknesses of the grouting stopping plate and the grouting stopping rib are 15-25 mm, the burying depth of the grouting stopping rib is 500-600 mm, the grouting hole aperture is 70-120 mm, and the grouting hole spacing is 1.0-2.0 m; the grouting pipe is a hollow steel pipe with the diameter of 20-50 mm, 3-4 holes are uniformly formed in the circumferential direction of every 10cm along the pipe opening direction of the grouting pipe, 80cm upwards at the bottom of the grouting pipe, the hole sealing locating belt is made of woven bags, the length of the hole sealing locating belt is 10-20 mm, the locator is made of two phi 6 short steel bars and is welded on the grouting pipe in parallel to determine the position of the hole sealing locating belt, and the pouring length of hole sealing concrete is 50-60 mm.
2. The construction process of a hole sealing structure for reinforcing a shallow foundation by grouting according to claim 1, wherein the construction process is applicable to reinforcement of a shallow foundation composed of any one of a hybrid fill, an artificial fill, a sand, a silt and a cohesive soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948332.6A CN107829423B (en) | 2017-10-12 | 2017-10-12 | Hole sealing structure for reinforcing shallow foundation by grouting method and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948332.6A CN107829423B (en) | 2017-10-12 | 2017-10-12 | Hole sealing structure for reinforcing shallow foundation by grouting method and construction process thereof |
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| Publication Number | Publication Date |
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| CN107829423A CN107829423A (en) | 2018-03-23 |
| CN107829423B true CN107829423B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710948332.6A Active CN107829423B (en) | 2017-10-12 | 2017-10-12 | Hole sealing structure for reinforcing shallow foundation by grouting method and construction process thereof |
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