CN111485544A - Disposal detection structure and method for karst cave under rock-socketed pile base - Google Patents
Disposal detection structure and method for karst cave under rock-socketed pile base Download PDFInfo
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- CN111485544A CN111485544A CN202010463863.8A CN202010463863A CN111485544A CN 111485544 A CN111485544 A CN 111485544A CN 202010463863 A CN202010463863 A CN 202010463863A CN 111485544 A CN111485544 A CN 111485544A
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- grouting
- hole
- detection
- karst cave
- slip casting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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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 relates to a disposal detection structure and a method for a karst cave under a rock-socketed pile base, belonging to the field of rock-socketed pile base disposal construction. Including solution cavity detection slip casting hole, detect supplementary slip casting hole and curtain slip casting hole, solution cavity detection slip casting hole is used for surveying the slip casting to the lower part of foundation pile, it is used for surveying the solution cavity effect after the slip casting to detect supplementary slip casting hole and slip casting, direct drilling solution cavity detection slip casting hole in the foundation pile center when foundation pile construction is accomplished and is not under construction superstructure and survey, when construction is accomplished foundation pile superstructure thing, survey the slip casting hole with solution cavity and set up the periphery at the pile foundation, it sets up the edge in solution cavity both sides to detect supplementary slip casting hole, curtain slip casting hole sets up in the solution cavity edge outside. The invention can accurately process the karst cave under the socketed pile base and can accurately detect the processing effect of the karst cave.
Description
Technical Field
The invention belongs to the field of bottom treatment construction of rock-socketed pile foundations, and relates to a disposal detection structure and method for a karst cave under a rock-socketed pile foundation.
Background
The karst is widely distributed in China, and with the large-scale construction of highway engineering, a bridge which is an important component of the highway engineering cannot be inevitably constructed in a karst area. When a bridge in a karst area is used, the bearing capacity of a foundation is insufficient and the stability is reduced due to the influence of a karst cave formed by the karst action at the bottom of a pile foundation, so that the problems of uneven settlement of a pier, cracking of a bridge slab and the like are caused. With the large-scale adoption of bridge pile foundations in karst areas and the construction of simply supported continuous bridge bridges, the exploration of pile foundations cannot reach 100%, the problem of karst cave at the bottom of the pile foundations due to leakage is increased, the constructed pile foundations are removed by means which are not applicable in terms of construction period and cost, and it is very important to process the built karst cave under the rock-socketed pile foundations and detect the disposal effect of the karst cave.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a disposal and detection structure for a karst cave under a rock-socketed pile base, which can accurately process the karst cave under the rock-socketed pile base and can accurately detect the disposal effect.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a karst cave under rock-socketed pile basement is dealt with and is detected structure, survey supplementary injected hole and curtain injected hole including the karst cave, the grouting is surveyed to the karst cave, it is used for surveying the slip casting to the lower part of pile foundation to detect supplementary injected hole, it is used for detecting the karst cave effect after the slip casting to detect supplementary injected hole, direct karst cave in the pile foundation center surveys the injected hole and surveys when pile foundation construction is accomplished not the superstructure, when the pile foundation superstructure thing is accomplished in the construction, survey the injected hole setting in the periphery of pile foundation with the karst cave, it sets up the edge in the karst cave both sides to detect supplementary injected hole, curtain injected hole sets up in the karst cave edge outside.
Furthermore, when the karst cave detection grouting hole is drilled, the steel pipe with the hole is timely sent into the karst cave detection grouting hole after the hole is drilled.
And further, detecting and supplementing the steel sleeve with the hole which is placed in the grouting hole.
Further, the curtain grouting holes surround the karst cave to form a grid structure.
The invention also discloses a disposal detection method of the karst cave under the socketed pile substrate, which comprises the following steps:
step one, drilling: drilling a solution cavity detection grouting hole, timely issuing a steel pipe with a hole into the solution cavity detection grouting hole after the solution cavity detection grouting hole is drilled, and detecting the position of the solution cavity after drilling is completed; drilling a detection supplementary grouting hole, and putting a steel sleeve with a hole in the detection supplementary grouting hole;
step two, grouting: after the position and the size of the karst cave are determined, a detection hole grouting form is adopted, a detection hole of a karst cave detection grouting hole is changed into a grouting hole, and sufficient high-pressure cement slurry is injected in time;
step three, detection: after grouting is completed for a certain time to achieve an expected effect, detecting whether the underlying karst cave is tightly filled or not by detecting the descending detection equipment of the supplementary grouting hole;
step four, supplementary grouting: after the karst cave is ensured to be filled compactly after detection, the karst cave detection grouting holes are supplemented with grouting and filled compactly, and the situation of incompact is found, and the grout is ensured to flow out along the rock cracks through detecting the high-pressure grouting supplement of the detection holes of the supplement grouting holes;
and fifthly, grouting the curtain grouting holes.
Further, in the step one, the bottom of the grouting hole is detected to 5m from the bottom of the pile by the karst cave.
Furthermore, in the first step, the supplementary grouting holes are detected to be positioned at the edges of the two sides of the karst cave, and the supplementary grouting holes are detected to be positioned in the range of 0.5m of the two sides of the karst cave edge.
Further, in the fifth step, the distance between the curtain grouting hole and the edge of the karst cave is 3 m.
And further, grouting the curtain grouting holes in the fifth step by adopting a jet grouting process.
The invention has the beneficial effects that:
the invention provides a disposal and detection structure for a karst cave under a rock-socketed pile base, which has the advantages of simple structure, convenient operation, manpower and material resource saving, accurate disposal of the karst cave under the rock-socketed pile base and accurate detection of the disposal effect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a cross-sectional view of the invention;
fig. 2 is a top view of the invention.
Reference numerals:
1. grouting holes for karst cave detection; 2. detecting supplementary grouting holes, 3 and curtain grouting holes; 4. a pile foundation; 5. and (4) cave filling.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, a disposal and detection structure for a karst cave under a rock-socketed pile base includes a karst cave detection grouting hole 1, a detection supplementary grouting hole 2, and a curtain grouting hole 3. The karst cave detection grouting hole 1 is used for detecting the lower part of the pile foundation 4 and grouting is carried out when needed. And the detection supplementary grouting holes 2 are used for detecting the karst cave filling effect after the karst cave detection grouting holes 1 detect and perform grouting, and performing supplementary grouting if necessary.
The karst cave detection grouting holes 1 are positioned according to the engineering progress degree, different karst cave detection grouting holes 1 are arranged according to different construction progresses. When the upper structure of the pile foundation 4 is not constructed, the karst cave detection grouting hole 1 is directly drilled in the center of the pile foundation 4 for detection, and the drilling depth of the karst cave detection grouting hole 1 reaches the position of 5m from the bottom of the pile. When the upper structure of the pile foundation 4 is constructed, the karst cave detection grouting holes 1 are arranged on the periphery of the pile foundation 4. When the karst cave detection grouting hole 1 is drilled, the steel pipe with the holes is timely sent into the karst cave detection grouting hole 1 after drilling, and the karst cave 5 detection and later-stage grouting are prevented from being influenced by hole collapse.
In order to detect the grouting reinforcement effect in the karst cave 5 after the karst cave detection grouting holes 1 are grouted and backfilled, the karst cave 5 is ensured to be filled with cement slurry, two (the specific quantity is determined according to the volume of the karst cave 5) detection supplementary grouting holes 2 are drilled in the range of 0.5m on the two sides of the edge of the karst cave 5, the distance of the detection supplementary grouting holes 2 is based on the situation that the karst cave 5 is not punched, meanwhile, the later-stage high-pressure cement slurry is ensured to permeate into the karst cave 5, and the steel sleeve with the hole is placed in the detection supplementary grouting holes 2.
In order to ensure the grouting reinforcement effect, the curtain grouting holes 3 are arranged at the position 3m away from the edge of the karst cave 5, the curtain grouting holes 3 form a grid structure, and the curtain grouting holes 3 are grouted by adopting a rotary jet grouting process.
The disposal method comprises the following steps;
step one, drilling:
when the upper structure is not constructed, drilling a hole at the top center of the pile foundation 4 by using a geological drill, drilling a karst cave detection grouting hole 1, wherein the distance between the bottom of the karst cave detection grouting hole 1 and the pile bottom from the drilling depth is 5m, and lowering the position of the karst cave 5 by using a geological radar detector after the drilling is finished to detect parameters such as volume and the like;
after the upper structure such as a pier stud is constructed, a drilling detection mode of the periphery of a pile foundation 4 is adopted, after a karst cave 5 is drilled to detect a grouting hole 1, a steel pipe with holes is timely sent into the karst cave 5 to detect the grouting hole 1, and the karst cave 5 is prevented from being influenced by hole collapse to detect and later grouting;
in order to detect the grouting reinforcement effect in the karst cave 5 and ensure that the karst cave 5 is filled with cement slurry, the detection supplement grouting holes 2 are drilled in the range of 0.5m on the two sides of the edge of the karst cave 5, the distance of the detection supplement grouting holes 2 is based on not penetrating the karst cave 5, meanwhile, the later high-pressure cement slurry is ensured to permeate into the karst cave 5, and the steel sleeve with the holes is placed in the detection supplement grouting holes 2.
Step two, grouting: determining the position of the karst cave 5, adopting a detection hole grouting form after the size is determined, changing a detection hole of the karst cave detection grouting hole 1 into a grouting hole, and timely injecting sufficient high-pressure cement slurry;
step three, detection: after grouting is completed for a certain time to achieve an expected effect, detecting whether the underlying karst cave 5 is filled compactly or not by detecting low-quality radar detection equipment below the supplementary grouting hole 2;
step four, supplementary grouting: after the karst cave 5 is ensured to be filled compactly after detection, the karst cave detection grouting holes 1 are supplemented with grouting and filled compactly, and the situation of incompact is found, and the grout is ensured to flow out along the rock cracks through detecting the high-pressure grouting supplement of the detection holes of the supplement grouting holes 2;
step five, curtain grouting: in order to ensure the grouting reinforcement effect, the grids are drawn within a range of 3m from the edge of the karst cave 5, and grouting is carried out on the curtain grouting holes 3 by adopting a rotary jet grouting process.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and 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 modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (9)
1. A rock-socketed pile base underburden deals with detects structure which characterized in that: including solution cavity detection slip casting hole (1), detect supplementary slip casting hole (2) and curtain slip casting hole (3), solution cavity detection slip casting hole (1) is used for surveying the slip casting to the lower part of pile foundation (4), it is used for detecting solution cavity (5) effect after the slip casting to detect supplementary slip casting hole (2), direct solution cavity detection slip casting hole (1) is bored at pile foundation (4) center when pile foundation (4) construction completion is not under construction superstructure and is surveyed, when having constructed completion pile foundation (4) superstructure thing, survey solution cavity detection slip casting hole (1) and set up the periphery in pile foundation (4), it sets up the edge in solution cavity (5) both sides to detect supplementary slip casting hole (2), curtain slip casting hole (3) set up in solution cavity (5) edge outside.
2. The rock-socketed pile foundation underburden disposal detection structure of claim 1, characterized in that: when the karst cave detection grouting hole (1) is drilled, the steel pipe with the hole is timely sent into the karst cave detection grouting hole (1) after the hole is drilled.
3. The rock-socketed pile foundation underburden disposal detection structure of claim 1, characterized in that: a steel sleeve with a hole is placed in the detection supplementary grouting hole (2) downwards.
4. The rock-socketed pile foundation underburden disposal detection structure of claim 1, characterized in that: the curtain grouting holes (3) surround the karst cave (5) to form a grid structure.
5. A disposal detection method for a karst cave under a rock-socketed pile base is characterized by comprising the following steps:
step one, drilling: drilling a solution cavity detection grouting hole (1), timely issuing a steel pipe with a hole into the solution cavity detection grouting hole (1) after the solution cavity detection grouting hole (1) is drilled, and detecting the position of a solution cavity (5) after drilling is finished; drilling a detection supplementary grouting hole (2), and putting a steel sleeve with a hole in the detection supplementary grouting hole (2);
step two, grouting: after the position and the size of the karst cave (5) are determined, a detection hole grouting form is adopted, a detection hole of a detection grouting hole (1) of the karst cave (5) is changed into a grouting hole, and sufficient high-pressure cement slurry is injected in time;
step three, detection: after grouting is completed for a certain time to achieve an expected effect, detecting whether the underlying karst cave (5) is filled compactly or not by detecting the descending of the supplementary grouting hole (2);
step four, supplementary grouting: after the karst cave (5) is ensured to be filled compactly after detection, grouting and filling are supplemented to the karst cave detection grouting holes (1), and the grout is ensured to flow out along the rock cracks by detecting the high-pressure grouting supplement of the detection holes of the supplement grouting holes (2) under the condition of incompact;
and fifthly, grouting is performed through the curtain grouting holes (3).
6. The method for detecting disposal of an underlying karst cave of a socketed pile foundation as claimed in claim 5, wherein: in the first step, the bottom of the grouting hole (1) is detected to 5m from the bottom of the pile.
7. The method for detecting disposal of an underlying karst cave of a socketed pile foundation as claimed in claim 5, wherein: in the first step, the supplementary grouting holes (2) are detected to be positioned at the edges of the two sides of the karst cave (5), and the supplementary grouting holes (2) are detected to be positioned in the range of 0.5m at the two sides of the karst cave (5).
8. The method for detecting disposal of an underlying karst cave of a socketed pile foundation as claimed in claim 5, wherein: in the fifth step, the distance between the curtain grouting hole (3) and the edge of the karst cave (5) is 3 m.
9. The method for detecting disposal of an underlying karst cave of a socketed pile foundation as claimed in claim 5, wherein: and fifthly, grouting the curtain grouting holes (3) by adopting a jet grouting process through the curtain grouting holes (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010463863.8A CN111485544A (en) | 2020-05-27 | 2020-05-27 | Disposal detection structure and method for karst cave under rock-socketed pile base |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010463863.8A CN111485544A (en) | 2020-05-27 | 2020-05-27 | Disposal detection structure and method for karst cave under rock-socketed pile base |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269213A (en) * | 2020-09-21 | 2021-01-26 | 中铁工程设计咨询集团有限公司 | Geological detection method, system and medium for multi-pile foundation of karst area |
| CN112459079A (en) * | 2020-11-13 | 2021-03-09 | 浙江省水利水电勘测设计院 | Construction method for buried pipe foundation of high-corrosion stratum |
| CN112523205A (en) * | 2020-11-24 | 2021-03-19 | 中铁大桥局集团第五工程有限公司 | Pile foundation construction method for easy-collapse thick covering layer opening karst cave geology |
| CN114032906A (en) * | 2021-06-01 | 2022-02-11 | 浙江工业大学 | Automatic shallow biogas cavity identification and filling equipment and biogas cavity grouting filling construction method |
-
2020
- 2020-05-27 CN CN202010463863.8A patent/CN111485544A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269213A (en) * | 2020-09-21 | 2021-01-26 | 中铁工程设计咨询集团有限公司 | Geological detection method, system and medium for multi-pile foundation of karst area |
| CN112269213B (en) * | 2020-09-21 | 2023-06-23 | 中铁工程设计咨询集团有限公司 | Geological detection method, system and medium for karst region multi-pile foundation |
| CN112459079A (en) * | 2020-11-13 | 2021-03-09 | 浙江省水利水电勘测设计院 | Construction method for buried pipe foundation of high-corrosion stratum |
| CN112523205A (en) * | 2020-11-24 | 2021-03-19 | 中铁大桥局集团第五工程有限公司 | Pile foundation construction method for easy-collapse thick covering layer opening karst cave geology |
| CN114032906A (en) * | 2021-06-01 | 2022-02-11 | 浙江工业大学 | Automatic shallow biogas cavity identification and filling equipment and biogas cavity grouting filling construction method |
| CN114032906B (en) * | 2021-06-01 | 2023-08-22 | 浙江工业大学 | Automatic shallow biogas cavity recognition and filling equipment and construction method for grouting and filling biogas cavity |
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