CN110965550A - Method and structure for plugging and fixing hole of cast-in-place pile - Google Patents
Method and structure for plugging and fixing hole of cast-in-place pile Download PDFInfo
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- CN110965550A CN110965550A CN201911233152.5A CN201911233152A CN110965550A CN 110965550 A CN110965550 A CN 110965550A CN 201911233152 A CN201911233152 A CN 201911233152A CN 110965550 A CN110965550 A CN 110965550A
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- holes
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- place pile
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011440 grout Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims description 26
- 238000010276 construction Methods 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
A method and structure for stopping up the leakage and fixing holes of cast-in-place pile features that before the cast-in-place pile is constructed, a test for the influence radius of grout is performed to detect the influence radius of grout, and then the holes are arranged around the pile hole and grout is injected into them.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a method and a structure for leaking stoppage and hole fixation of a cast-in-place pile.
Background
At present, with the development of economic society, the construction engineering projects of highway bridges are more and more, and cast-in-place piles are widely used in the highway bridge engineering as a mature and reliable foundation form. However, under complex geological conditions, particularly when the construction is carried out in a stratum with strong permeability such as a sand layer, a pebble layer and the like or a limestone stratum, the construction problems of slurry leakage, hole collapse and the like often exist, the non-production time is prolonged, and the construction benefit is influenced. After the construction problems such as slurry leakage and hole collapse occur, construction generally needs to be suspended, construction equipment is withdrawn according to the conditions of slurry leakage and hole collapse, and measures such as clay are thrown into the drilled hole to block a leaking layer. The general post-treatment method is time-consuming and labor-consuming, and can not ensure whether the subsequent construction of the cast-in-place pile has problems or not.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method and a structure for plugging and fixing holes of a cast-in-place pile, which are used for performing plugging and hole fixing pretreatment before the cast-in-place pile construction, improving the cast-in-place pile construction efficiency and ensuring the cast-in-place pile construction quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for plugging and fixing holes of cast-in-place piles comprises the following steps:
the method comprises the following steps: before the construction of a cast-in-place pile, carrying out grouting influence radius test: drilling a plurality of plugging holes and wall fixing holes in an on-site stratum, then injecting prepared slurry into the plugging holes and the wall fixing holes, and detecting the minimum influence radius of the slurry after the slurry is solidified, namely the influence radius R of the slurry;
step two: positioning the position of a cast-in-place pile hole;
step three: arranging the plugging holes and the wall fixing holes around the cast-in-place pile holes, wherein the distance between the plugging holes or the wall fixing holes and the edges of the cast-in-place pile holes is smaller than R, and the center distance between the plugging holes and the wall fixing holes is smaller than 2R;
step four: analyzing the easily collapsed and easily leaked layer of the stratum according to geological survey data, and determining the depths of the leaking stoppage holes and the wall fixing holes;
step five: and injecting the grout into the plugging hole and the wall fixing hole, after the grout is solidified, constructing the cast-in-place pile, and forming a reinforcing area at the edge of the cast-in-place pile hole so as to reinforce the easily leaked and easily collapsed layer of the bottom layer.
Further, in the fourth step, the depth of the leakage blocking hole reaches 1m below the easily-leaked and easily-collapsed layer, and the depth of the fixed wall hole penetrates through the easily-leaked and easily-collapsed layer.
Further, the upper end of the reinforcing area is 0.5m higher than the leakage-prone layer.
Further, in the first step and the fifth step, the grout is a mixture of grout, an accelerator and water glass, wherein the proportion of the grout to the water glass is 1: 0.5-1: 1.
further, in the first step, the minimum influence radius of the slurry is detected by a digging or drilling method.
Further, the leaking stoppage holes and the wall fixing holes are uniformly distributed on the circumference of the cast-in-place pile hole, and the leaking stoppage holes are positioned between every two adjacent wall fixing holes.
The utility model provides a bored concrete pile leaking stoppage solid hole structure, is including setting up in the bored concrete pile hole in stratum, the circumference in bored concrete pile hole is equipped with a plurality of leaking stoppage holes and solid wall hole, leaking stoppage hole with the downthehole grout that has poured into of solid wall, with bored concrete pile hole edge forms to easily leak in the stratum and easily collapse the reinforced (rfd) district in layer.
Further, the grout is a mixture of cement paste, an accelerator and water glass, wherein the ratio of the cement paste to the water glass is 1: 0.5-1: 1.
further, the leaking stoppage holes and the wall fixing holes are uniformly distributed on the circumference of the cast-in-place pile hole, and the leaking stoppage holes are positioned between every two adjacent wall fixing holes.
Furthermore, the leakage blocking holes and the wall fixing holes are arranged in a staggered mode at intervals.
The invention has the beneficial effects that:
before the construction of the cast-in-place pile, a grouting influence radius test is firstly carried out, the influence radius of slurry is detected, then leak stopping holes and wall fixing holes are arranged around the cast-in-place pile hole, the slurry is injected into the leak stopping holes and the wall fixing holes, and the construction of the cast-in-place pile is carried out after the slurry is solidified, so that the easily leaked and easily collapsed layer around the cast-in-place pile can be reinforced.
Drawings
FIG. 1 is a schematic view of a plugging and hole-fixing structure of a cast-in-place pile according to the present invention;
FIG. 2 is a schematic view of the bored concrete pile after the leak-stopping and hole-fixing structure is bored;
FIG. 3 is a schematic structural view of another embodiment of the plugging and hole-fixing structure of the cast-in-place pile of the present invention;
in the figure, 1 is a bored concrete pile hole, 2 is a leak stopping hole, 3 is a wall fixing hole, 4 is a covering soil layer, 5 is a layer easy to leak and collapse and 6 is a reinforcing area, L1 is the distance between the leak stopping hole or the wall fixing hole and the edge of the bored concrete pile hole, and L2 is the center distance between the leak stopping hole and the wall fixing hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Referring to fig. 1 and 2, the invention provides a method for plugging and fixing a hole of a cast-in-place pile, which specifically comprises the following steps:
the method comprises the following steps: arranging and leveling the field, and performing grouting influence radius test before cast-in-place pile construction: a drilling machine is used for drilling a plurality of plugging holes 2 and wall fixing holes 3 in an on-site stratum, generally a down-the-hole drill can be selected to improve the work efficiency, then the prepared grout is injected into the plugging holes 2 and the wall fixing holes 3 through a double-liquid grouting pump, and after the grout is solidified, the minimum influence radius of the grout is detected, namely the influence radius R of the grout. In this embodiment, the minimum radius of influence of the slurry is detected by excavation or drilling.
Step two: and (4) positioning the position of the cast-in-place pile hole 1, wherein the diameter of the cast-in-place pile is D.
Step three: the method is characterized in that plugging holes 2 and wall fixing holes 3 are arranged around a cast-in-place pile hole 1, the plugging holes 2 and the wall fixing holes 3 are arranged around the cast-in-place pile hole 1 in a surrounding mode, the number of the plugging holes 2 and the wall fixing holes 3 is determined according to the slurry leakage condition of slurry on site, the distance L1 between the plugging holes 2 or the wall fixing holes 3 and the edge of the cast-in-place pile hole 1 is smaller than R, and the center distance L2 between the plugging holes 2 and the wall fixing holes 3 is smaller than 2R, so that the hole wall position is reinforced in cast-in-place pile hole forming construction.
Step four: and analyzing the easily collapsed and easily leaked layer of the stratum according to the geological survey data, and determining the depths of the leaking stoppage holes 2 and the wall fixing holes 3. In this embodiment, the depth of the plugging hole 2 is 1m below the easily collapsible layer 5 of the bottom layer, and the depth of the wall fixing hole 3 penetrates through the easily collapsible layer 5.
Step five: and (3) pressing the prepared slurry into the plugging hole 2 and the wall fixing hole 3 by using a double-liquid grouting pump, after the slurry is solidified, constructing the cast-in-place pile, and forming a reinforcing area 6 at the edge of the cast-in-place pile hole 1 so as to reinforce the easy-to-leak and easy-to-collapse layer 5. Preferably, the height of the upper end of the reinforcing area 6 is slightly higher than the easily-leaked and easily-collapsed layer 5, and the upper end of the reinforcing area enters the soil covering layer 4 by 0.5 m.
And repeating the steps to finish the reinforcing and leaking stoppage construction of the cast-in-place piles in all areas needing reinforcing and leaking stoppage.
In a preferred embodiment, the grout injected into the plugging holes 2 and the wall fixing holes 3 is a mixture of cement paste, an accelerator and water glass, wherein the ratio of the cement paste to the water glass is 1: 0.5-1: 1.
as shown in fig. 1 and fig. 3, the plugging holes 2 and the wall fixing holes 3 are uniformly distributed on the circumference of the cast-in-place pile hole 1, and the plugging holes 2 are located between two adjacent wall fixing holes 3. In the embodiment of fig. 1, a plurality of wall fixing holes 3 are respectively arranged on both sides of each plugging hole 2, and in another embodiment of fig. 3, the plugging holes 2 and the wall fixing holes 3 are alternately arranged. The number and the arrangement mode of the plugging holes 2 and the wall fixing holes 3 are determined according to the slurry leakage condition of the on-site slurry.
The method for plugging and fixing the hole of the cast-in-place pile can reinforce the easily-leaked and easily-collapsed layer 5 around the cast-in-place pile, is suitable for cast-in-place pile construction of easily-collapsed and easily-leaked strata such as gravel, cobble, limestone and the like, has reasonable design of construction steps and simple operation, effectively avoids the quality problems of slurry leakage, hole collapse and the like in the cast-in-place pile construction process, ensures continuous and smooth cast-in-place pile construction, reduces reworking after the quality problems occur in cast-in-place pile hole forming construction, and effectively ensures the hole forming quality.
As shown in fig. 1 to 3, the present invention further provides a bored concrete pile leaking stoppage and hole fixing structure, which includes a bored concrete pile hole 1 disposed in a ground layer, a plurality of leaking stoppage holes 2 and wall fixing holes 3 are disposed on the circumference of the bored concrete pile hole 1, and grout is poured into the leaking stoppage holes 2 and the wall fixing holes 3 to form a reinforcing region 6 at the edge of the bored concrete pile hole 1 for reinforcing a layer 5 prone to leaking and collapsing in the ground layer. Wherein the plugging holes 2 and the wall fixing holes 3 are uniformly distributed on the circumference of the cast-in-place pile hole 1, and the plugging holes 2 are positioned between two adjacent wall fixing holes 3. In one embodiment, three plugging holes 2 are provided, and three wall fixing holes 3 are provided between two adjacent plugging holes 2. In another embodiment, the plugging holes 2 and the wall fixing holes 3 are the same in number and are arranged at intervals in a staggered mode.
Through last bored concrete pile leaking stoppage solid pore structure can be in the easy layer 5 that collapses of leaking of bottom form reinforcing area 6, reinforcing area 6 is located the bored concrete pile around, consequently can consolidate the bored concrete pile, effectively avoids bored concrete pile work progress to leak thick liquid, the hole quality problems such as collapse, guarantees that the bored concrete pile construction is continuous, and is smooth and easy, reduces to appear in the bored concrete pile pore-forming construction quality problem back and do over again, has effectively guaranteed the pore-forming quality.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for plugging and fixing a hole of a cast-in-place pile is characterized by comprising the following steps:
the method comprises the following steps: before the construction of a cast-in-place pile, carrying out grouting influence radius test: drilling a plurality of plugging holes and wall fixing holes in an on-site stratum, then injecting prepared slurry into the plugging holes and the wall fixing holes, and detecting the minimum influence radius of the slurry after the slurry is solidified, namely the influence radius R of the slurry;
step two: positioning the position of a cast-in-place pile hole;
step three: arranging the plugging holes and the wall fixing holes around the cast-in-place pile holes, wherein the distance between the plugging holes or the wall fixing holes and the edges of the cast-in-place pile holes is smaller than R, and the center distance between the plugging holes and the wall fixing holes is smaller than 2R;
step four: analyzing the easily collapsed and easily leaked layer of the stratum according to geological survey data, and determining the depths of the leaking stoppage holes and the wall fixing holes;
step five: and injecting the grout into the plugging hole and the wall fixing hole, after the grout is solidified, constructing the cast-in-place pile, and forming a reinforcing area at the edge of the cast-in-place pile hole so as to reinforce the easily leaked and easily collapsed layer of the bottom layer.
2. A method for plugging and fixing a hole of a cast-in-place pile according to claim 1, wherein: in the fourth step, the depth of the leakage blocking hole reaches 1m below the easily-leaked and easily-collapsed layer, and the depth of the fixed wall hole penetrates through the easily-leaked and easily-collapsed layer.
3. A method for plugging and fixing a hole of a cast-in-place pile according to claim 1, wherein: the upper end of the reinforcing area is 0.5m higher than the easy-to-leak and easy-to-collapse layer.
4. A method for plugging and fixing a hole of a cast-in-place pile according to claim 1, wherein: in the first step and the fifth step, the slurry is a mixture of cement paste, an accelerator and water glass, wherein the ratio of the cement paste to the water glass is 1: 0.5-1: 1.
5. a method for plugging and fixing a hole of a cast-in-place pile according to claim 1, wherein: in the first step, the minimum influence radius of the slurry is detected by a digging or drilling method.
6. A method for plugging and fixing a hole of a cast-in-place pile according to claim 1, wherein: the plugging holes and the wall fixing holes are uniformly distributed on the circumference of the cast-in-place pile hole, and the plugging holes are positioned between every two adjacent wall fixing holes.
7. A bored concrete pile leaking stoppage solid hole structure which characterized in that includes: the grouting pile comprises a grouting pile hole arranged in a stratum, wherein a plurality of plugging holes and wall fixing holes are formed in the circumference of the grouting pile hole, grout is poured into the plugging holes and the wall fixing holes, and a reinforcing area for reinforcing the easily-leaked and easily-collapsed layer in the stratum is formed in the edge of the grouting pile hole.
8. A bored concrete pile leaking stoppage and hole-fixing structure as recited in claim 7, wherein: the slurry is a mixture of cement paste, an accelerator and water glass, wherein the ratio of the cement paste to the water glass is 1: 0.5-1: 1.
9. a bored concrete pile hole plugging and fixing structure according to claim 1, wherein: the plugging holes and the wall fixing holes are uniformly distributed on the circumference of the cast-in-place pile hole, and the plugging holes are positioned between every two adjacent wall fixing holes.
10. A bored concrete pile hole plugging and fixing structure according to claim 9, wherein: the leakage blocking holes and the wall fixing holes are arranged in a staggered mode at intervals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911233152.5A CN110965550A (en) | 2019-12-05 | 2019-12-05 | Method and structure for plugging and fixing hole of cast-in-place pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911233152.5A CN110965550A (en) | 2019-12-05 | 2019-12-05 | Method and structure for plugging and fixing hole of cast-in-place pile |
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| CN110965550A true CN110965550A (en) | 2020-04-07 |
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| CN201911233152.5A Pending CN110965550A (en) | 2019-12-05 | 2019-12-05 | Method and structure for plugging and fixing hole of cast-in-place pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112726565A (en) * | 2020-12-25 | 2021-04-30 | 中建八局第三建设有限公司 | Construction method for rotary digging pile penetrating through construction waste |
| CN113605379A (en) * | 2021-08-16 | 2021-11-05 | 大成科创基础建设股份有限公司 | Construction process of large-diameter cast-in-place pile in high-fill area |
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| CN109440757A (en) * | 2018-11-30 | 2019-03-08 | 长沙恒德岩土工程技术有限公司 | A kind of foundation reinforcement method for karst region |
| CN212405119U (en) * | 2019-12-05 | 2021-01-26 | 中交第四航务工程局有限公司 | Bored concrete pile leaking stoppage solid hole structure |
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2019
- 2019-12-05 CN CN201911233152.5A patent/CN110965550A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109440757A (en) * | 2018-11-30 | 2019-03-08 | 长沙恒德岩土工程技术有限公司 | A kind of foundation reinforcement method for karst region |
| CN212405119U (en) * | 2019-12-05 | 2021-01-26 | 中交第四航务工程局有限公司 | Bored concrete pile leaking stoppage solid hole structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112726565A (en) * | 2020-12-25 | 2021-04-30 | 中建八局第三建设有限公司 | Construction method for rotary digging pile penetrating through construction waste |
| CN113605379A (en) * | 2021-08-16 | 2021-11-05 | 大成科创基础建设股份有限公司 | Construction process of large-diameter cast-in-place pile in high-fill area |
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