CN110924363A - Inverted hanging well structure for treating soil dam collapse pit and construction method thereof - Google Patents
Inverted hanging well structure for treating soil dam collapse pit and construction method thereof Download PDFInfo
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- CN110924363A CN110924363A CN201911308424.3A CN201911308424A CN110924363A CN 110924363 A CN110924363 A CN 110924363A CN 201911308424 A CN201911308424 A CN 201911308424A CN 110924363 A CN110924363 A CN 110924363A
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- 238000010276 construction Methods 0.000 title claims abstract description 13
- 239000002689 soil Substances 0.000 title claims description 9
- 238000009412 basement excavation Methods 0.000 claims abstract description 11
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 6
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 5
- 235000011613 Pinus brutia Nutrition 0.000 claims description 5
- 241000018646 Pinus brutia Species 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000004927 clay Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 206010019133 Hangover Diseases 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses an inverted well structure for treating a collapsed pit of an earth dam and a construction method thereof, and particularly relates to the technical field of hydraulic engineering. The utility model provides an overhead pit structure for earth dam pit collapse is handled, includes the overhead pit, and the part coincidence forms inside hollow coincidence region between per two adjacent overhead pits, and the inside distribution in coincidence region has support piece, and the overhead pit comprises a plurality of overhead pit walls, and the top of overhead pit wall is equipped with reinforced concrete fore shaft collar tie beam and fore shaft crossbeam. The technology of the invention overcomes the problems of large dam body repairing excavation amount, large supporting difficulty, difficult deep treatment construction and the like after the existing dam body has a collapsed pit, and can be used for repairing and reinforcing the collapsed pit of the dam body of the clay core wall.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering, in particular to an inverted hanging well structure for treating an earth dam collapse pit and a construction method thereof.
Background
Earth dams are mostly adopted in the construction of reservoir dams in various places in China, and for the earth dams, drainage facilities are arranged at the downstream of the earth dams to drain water seepage of dam bodies and dam foundations and protect downstream dam feet from being washed. However, if a pit is collapsed on the dam, leakage often occurs on a post-dam drainage facility (such as a drainage ridge, a drainage facility formed by piling up sand, broken stones and rock blocks at the toe of the dam) and a simple, convenient and effective treatment scheme is not available at present, so that the repaired dam can normally operate for a long time and the post-dam drainage facility does not leak in the long-term operation process.
Disclosure of Invention
The invention aims to provide a hanging well structure for treating a collapsed pit of an earth dam and a construction method thereof, and aims to solve the problems that the existing dam body is large in restoration excavation amount, large in supporting difficulty and difficult in deep treatment construction after the collapsed pit occurs.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a hang-over well structure for earth dam collapse hole is handled, includes a plurality of diameter the same hang-over well, every two are adjacent hang-over well between the partial coincidence form inside hollow coincidence region, the inside distribution in coincidence region has a plurality of support piece, hang-over well comprises a plurality of hang-over well walls, the top of hanging-over well wall is equipped with reinforced concrete fore shaft collar beam and fore shaft crossbeam.
In order to solve the above problem, the present application provides another technical solution: a construction method of an inverted hanging well for treating an earth dam collapse pit comprises the following steps,
s102, using the inverted well structure as claimed in claim 5, arranging the inverted well at a collapsed pit of the dam body, wherein the inverted well can completely cover the collapsed pit;
s104, controlling the excavation depth of the inverted well in the S102 to reach the bedrock;
s106, performing foundation cleaning treatment on the dam foundation strongly weathered layer in the S104, and pouring thick plain concrete back cover on the bedrock;
and S108, backfilling cohesive soil into the inverted well in the S106 and tamping.
Furthermore, the upper part of the inverted well wall is also provided with a bulge. The inverted well wall is combined with the dam body more firmly by virtue of the bulges, and the stability of the repaired collapsed pit is enhanced.
Furthermore, the inverted well wall, the locking collar beam and the locking beam are integrally formed. The strength of the inverted well wall can be enhanced through the integral forming manufacturing, so that the strength of the dam body after repair is enhanced.
Further, the support member is pine. The pine is adopted as the support piece, so that the material is convenient to obtain, the price is low, and the repair cost is favorably reduced.
Further, the fore shaft crossbeam sets up at two overhead kick-up shaft coincidence area's top, the shape of fore shaft crossbeam is inverted trapezoid, fore shaft circle roof beam sets up the overhead kick-up shaft top at the left and right sides respectively, the plane shape of fore shaft circle roof beam is the annular shape, one side of fore shaft circle roof beam is equipped with the opening, the both ends of fore shaft circle roof beam opening part are connected with the both ends of fore shaft crossbeam.
Can stabilize its loose soil body on every side through fore shaft crossbeam and fore shaft collar tie beam effectual when collapsing hole excavation, the artifical excavation of being convenient for to can combine inseparabler between each overhead hanging well, be convenient for strengthen the holistic intensity of overhead hanging well.
Furthermore, a grouting hole is formed in the dam foundation, and cement is injected into the grouting hole by adopting a curtain grouting method. The seepage-proofing performance of the dam body after modification can be enhanced by means of grouting holes and curtain grouting.
The beneficial effect of this scheme: 1. by adopting the scheme, the repair of the dam body collapsed pit can be realized, and the safety of the dam body is ensured; 2. the hanging well is used as a support measure for pit collapse excavation in the early stage and is used as an important part for dam body reinforcement in the later stage, and the function of an inverted hanging well is increased.
Drawings
FIG. 1 is a plan view of an overhead well in example 1;
fig. 2 is a cross-sectional view of the inverted well wall in example 1.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the well comprises an inverted well 1, an inverted well wall 2, a support piece 3, a locking port cross beam 4 and a locking port ring beam 5.
Examples
As shown in figures 1 and 2: the utility model provides a hang-over well structure for earth dam collapse hole is handled, includes the same hang-over well 1 of a plurality of diameters, and the partial coincidence forms inside hollow coincidence region between per two adjacent hang-over well 1, and the inside distribution of coincidence region has a plurality of support piece 3, and support piece 3 is the pine, adopts the pine to draw materials as support piece 3 convenient, the low price, is favorable to reducing prosthetic cost. The inverted well 1 is composed of a plurality of inverted well walls 2, a reinforced concrete fore shaft ring beam 5 and an fore shaft beam 4 are arranged at the top of each inverted well wall 2, inclined planes which are deviated into the inverted well 1 are arranged at the beam bottoms of the fore shaft ring beam 5 and the beam bottoms of the fore shaft beam 4, and the inverted well walls 2 which are positioned above and the inverted well walls 2 which are positioned below are adhered together when concrete is poured in every two adjacent inverted well walls 2.
The outer side of the upper portion of the hanging well wall 2 is further provided with a protrusion, so that the hanging well wall 2 is combined with a dam body more firmly by means of the protrusion, and the stability of the repaired collapsed pit is enhanced. The inverted well wall 2 and the bulges are integrally formed by reinforced concrete, so that the strength of the inverted well wall 2 is enhanced, and the strength of the dam body after repair is enhanced. Three supporting pieces 3 are fixed in the overlapping area corresponding to each reverse hanging well wall 2, which is beneficial to enhancing the supporting strength of the reverse hanging well wall 2 on the same layer.
The top of coincidence region is equipped with fore shaft crossbeam 4 on two overhead hung wells 1, and the shape of fore shaft crossbeam 4 is inverted trapezoidal, and the top of two overhead hung wells 1 of the left and right sides all is equipped with fore shaft collar tie-beam 5, and one side of every fore shaft collar tie-beam 5 all is equipped with the opening, and the plane shape of fore shaft collar tie-beam 5 is the annular shape, and the both ends of fore shaft collar tie-beam 5 opening part link together with the both ends of fore shaft crossbeam 4. Can stabilize its loose soil body on every side through fore shaft crossbeam 4 and fore shaft collar tie beam 5 effectual when collapsing the pit excavation, the artifical excavation of being convenient for to can combine inseparabler between each overhead pit 1, be convenient for strengthen the holistic intensity of overhead pit 1.
The construction method of the inverted well comprises the following steps,
s102, using the structure of the hanging well 1, arranging the hanging well 1 at a collapsed pit of a dam body, wherein the collapsed pit can be completely covered by the hanging well 1; because the inverted well 1 consists of a plurality of inverted well walls 2, when the inverted well is excavated manually, workers can pour the inverted well walls 2 while excavating, and the poured inverted well walls 2 can play a role in supporting;
s104, controlling the excavation depth of the inverted well 1 in the step S102 to reach the bedrock control;
s106, performing foundation cleaning treatment on the dam foundation strongly weathered layer in the S104, and pouring thick plain concrete back cover on the bedrock;
and S108, backfilling cohesive soil into the inverted well 1 in the S106 and tamping.
Finally, drilling a grouting hole on the dam foundation, and then injecting cement into the grouting hole by adopting a curtain grouting method; the seepage-proofing performance of the dam body near the collapsed pit can be enhanced by grouting holes and curtain grouting.
In this embodiment: the dam of the red reservoir in the east of Yuexi county in Anhui province is a clay core-wall sand-shell dam, the top elevation of which is 230.9m, the top width is 6.0 m, and the maximum dam height is 36.1 m. On 19 th of 2002, when the water level of the reservoir reaches 225.0 meters, a collapse pit appears at a position of 55 meters away from the right end of the dam facing the water slope, 3.6 meters away from the wave wall and 229.9 meters from the height, and the section of the collapse pit is 1.4 meters multiplied by 1.0 meter. And after the collapse dangerous case occurs, a leakage point appears at the downstream behind the dam, the leakage point is located at 1/3 on the right side of the main river channel, the elevation is about 190 meters, the caliber is 8 centimeters, and the water yield is 2-3 m 3/h.
Four inverted hanging wells 1 with the diameter of 2.3 meters are adopted at the collapsed pit to form a well group, each inverted hanging well 1 is internally provided with a plurality of inverted hanging well walls 2 with the thickness of 20 centimeters and the height of 1.3 meters, and the inverted hanging well walls 2 are integrally cast by reinforced concrete. The excavation depth of the inverted well 1 is 20 m to reach the bedrock control. Before backfilling the inverted well 1, cleaning the dam foundation strong weathering layer, pouring 0.3 m of plain concrete on the surface of the foundation rock to seal the bottom, finally backfilling the inverted well 1 with cohesive soil, and tamping the cohesive soil. The dam modified and reinforced by the scheme is normal in operation up to now. The collapse pit of the red reservoir dam of the east is inspected and processed by the aid of the hanging well 1, construction is simple, inspection is visual, and processing effect is good.
The foregoing are merely examples of the present invention and common general knowledge of known specific structures and/or features of the schemes has not been described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. The utility model provides a hang well structure upside down for dam collapse hole is handled which characterized in that: the hanging well comprises a plurality of hanging wells with the same diameter, every two adjacent hanging wells are partially overlapped to form an inner hollow overlapped area, a plurality of supporting pieces are distributed in the overlapped area, each hanging well comprises a plurality of hanging well walls, and a reinforced concrete locking ring beam and a locking cross beam are arranged at the top of each hanging well wall.
2. The structure of the inverted shaft for the treatment of the collapse pit of the earth dam as claimed in claim 1, wherein: the upper part of the hanging well wall is also provided with a bulge.
3. The structure of the inverted shaft for the treatment of the collapse pit of the earth dam as claimed in claim 2, wherein: the inverted well wall, the locking collar beam and the locking beam are integrally formed.
4. The structure of the inverted shaft for the treatment of the collapse pit of the earth dam as claimed in claim 1, wherein: the support member is pine.
5. A hanging well structure for dam collapse treatment according to any one of claims 1 to 4, wherein: the fore shaft crossbeam is arranged at the top of the coinciding area of the two inverted hanging wells, the fore shaft crossbeam is inverted trapezoid, the fore shaft ring beam is respectively arranged at the tops of the inverted hanging wells at the left side and the right side, the planar shape of the fore shaft ring beam is circular ring shape, one side of the fore shaft ring beam is provided with an opening, and the two ends of the opening of the fore shaft ring beam are connected with the two ends of the fore shaft crossbeam.
6. A construction method of an inverted hanging well for treating a collapsed pit of an earth dam is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s102, using the inverted well structure as claimed in claim 5, arranging the inverted well at a collapsed pit of the dam body, wherein the inverted well can completely cover the collapsed pit;
s104, controlling the excavation depth of the inverted well in the S102 to reach the bedrock;
s106, performing foundation cleaning treatment on the dam foundation strongly weathered layer in the S104, and pouring thick plain concrete back cover on the bedrock;
and S108, backfilling cohesive soil into the inverted well in the S106 and tamping.
7. The construction method of the hanging well for the dam collapse pit treatment according to claim 6, characterized in that: and a grouting hole is formed in the dam foundation, and cement is injected into the grouting hole by adopting a curtain grouting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308424.3A CN110924363A (en) | 2019-12-18 | 2019-12-18 | Inverted hanging well structure for treating soil dam collapse pit and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308424.3A CN110924363A (en) | 2019-12-18 | 2019-12-18 | Inverted hanging well structure for treating soil dam collapse pit and construction method thereof |
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| CN110924363A true CN110924363A (en) | 2020-03-27 |
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| CN201911308424.3A Pending CN110924363A (en) | 2019-12-18 | 2019-12-18 | Inverted hanging well structure for treating soil dam collapse pit and construction method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587391A (en) * | 2011-01-10 | 2012-07-18 | 孙冬梁 | Construction process for large-aperture brick and concrete reverse hanging well |
| CN211735285U (en) * | 2019-12-18 | 2020-10-23 | 安庆市水利水电规划设计院 | A hang well structure upside down for earth dam hole of collapsing is handled |
-
2019
- 2019-12-18 CN CN201911308424.3A patent/CN110924363A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587391A (en) * | 2011-01-10 | 2012-07-18 | 孙冬梁 | Construction process for large-aperture brick and concrete reverse hanging well |
| CN211735285U (en) * | 2019-12-18 | 2020-10-23 | 安庆市水利水电规划设计院 | A hang well structure upside down for earth dam hole of collapsing is handled |
Non-Patent Citations (2)
| Title |
|---|
| 李霞;: "英格堡水库河床砂砾石倒挂槽(井)墙基础防渗", 广东水利水电, no. 07, 25 July 2012 (2012-07-25), pages 63 - 66 * |
| 王永明 等: "土坝消险加固中的倒挂井混凝土防渗墙", 黑龙江水专学报, no. 03, 30 September 2003 (2003-09-30), pages 75 - 77 * |
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