CN108222045B - Connection structure for top of high-pressure jet grouting pile diaphragm wall - Google Patents
Connection structure for top of high-pressure jet grouting pile diaphragm wall Download PDFInfo
- Publication number
- CN108222045B CN108222045B CN201810232639.0A CN201810232639A CN108222045B CN 108222045 B CN108222045 B CN 108222045B CN 201810232639 A CN201810232639 A CN 201810232639A CN 108222045 B CN108222045 B CN 108222045B
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- pressure jet
- jet grouting
- grouting pile
- hydraulic structure
- upper hydraulic
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- 239000000463 material Substances 0.000 claims abstract description 23
- 239000010426 asphalt Substances 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- 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
-
- 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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a connecting structure for the top of a high-pressure jet grouting pile impervious wall, which comprises an upper hydraulic structure positioned above the high-pressure jet grouting pile impervious wall, wherein a special-shaped beam is arranged between the high-pressure jet grouting pile impervious wall and the upper hydraulic structure, and comprises a seat body and at least one embedded part arranged on the seat body; the upper hydraulic structure is provided with a groove which can allow the embedded part to be inserted; the base body is fixedly connected with the top of the high-pressure jet grouting pile impervious wall, and the embedded part is embedded into a groove of the upper hydraulic structure; and flexible material layers are arranged on the outer contour of the special-shaped beam and all the parts which need to be contacted with the upper hydraulic structure. The invention improves the sealing reliability of the high-pressure jet grouting pile diaphragm wall and the upper hydraulic structure, has good adaptability to vertical and horizontal differential deformation of the high-pressure jet grouting pile diaphragm wall and the upper hydraulic structure, ensures the safety and reliability of the diaphragm system, is convenient and quick to construct, and has wide application value in the field of hydraulic and hydroelectric engineering.
Description
Technical Field
The invention belongs to the water conservancy and hydropower engineering technology, and particularly relates to a connecting structure for the top of a high-pressure jet grouting pile diaphragm wall.
Background
The high-pressure jet grouting pile impervious wall is generally used for the impervious treatment of loose water-permeable foundations such as sand, gravel, crushed stone and the like or filled bodies. When the upper hydraulic structures such as a lock chamber bottom plate exist at the top of the high-pressure jet grouting pile impervious wall, the top of the impervious wall is often simply extended into the upper hydraulic structures such as the bottom plate to form rigid connection in order to form a closed impervious system; or a layer of cement soil is paved between the top of the impervious wall and the upper hydraulic structure, so that a weak part is formed at the joint. In the hydraulic and hydroelectric engineering, the building is subjected to larger vertical load and larger horizontal load, the rigidity difference between the top of the impervious wall and the hydraulic structure at the upper part is larger, so that the impervious wall and the hydraulic structure at the upper part are subjected to larger differential deformation in the vertical direction and the horizontal direction, the joint parts of the impervious wall and the hydraulic structure at the upper part are easily damaged, the reliability is poor, the impervious effect is poor, a water seepage channel is easily formed, the post treatment is difficult, and the joint parts of the impervious wall and the hydraulic structure at the upper part are the weakest links.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a connecting structure for the top of the high-pressure jet grouting pile impervious wall, so as to solve the problems of poor sealing of the joint part at the top of the impervious wall of the traditional high-pressure jet grouting pile and poor deformation adaptability to the wall and an upper hydraulic structure.
The technical scheme for solving the problems is as follows: the connecting structure for the top of the high-pressure jet grouting pile impervious wall comprises an upper hydraulic structure positioned above the high-pressure jet grouting pile impervious wall, wherein a special-shaped beam is arranged between the high-pressure jet grouting pile impervious wall and the upper hydraulic structure, and comprises a base body and at least one embedded part arranged on the base body;
the upper hydraulic structure is provided with a groove which can allow the embedded part to be inserted;
the base body is fixedly connected with the top of the high-pressure jet grouting pile impervious wall, and the embedded part is embedded into a groove of the upper hydraulic structure; and flexible material layers are arranged on the outer contour of the special-shaped beam and all the parts which need to be contacted with the upper hydraulic structure.
According to the scheme, good contact between the impervious wall and the special-shaped beam seat body can be realized by roughening the top of the impervious wall; by arranging the embedded part, embedded butt joint is realized, and the sealing reliability is enhanced; by arranging the flexible material layer, rigid connection is avoided, and the flexible material layer has good adaptability to vertical and horizontal differential deformation of the diaphragm wall and the upper hydraulic structure.
Preferably, the longitudinal section of the special-shaped beam is in a convex shape, the horizontal part of the special-shaped beam is a seat body, and the vertical part of the special-shaped beam is a jogged part.
Furthermore, the special-shaped beam is of a reinforced concrete structure, and reinforcing bars are arranged in the special-shaped beam and in the junction area between the embedded part and the seat body. The reinforcing bars are arranged at the position so as to enhance the local compressive capacity of the contact part, avoid local compressive damage of the special-shaped beam under a larger vertical load, enhance the horizontal shearing resistance of the abrupt cross section and prevent shearing damage.
Further, the outer surface of the flexible material layer positioned on the side surface of the embedded part is surrounded by a precast slab, the upper end of the precast slab is flush with the top of the embedded part, and the lower end of the precast slab is abutted with the flexible material layer on the outer contour of the seat body. The prefabricated slab can be used as a template on one hand; on the other hand, the close contact between the special-shaped beam and the upper hydraulic structure can be ensured.
Preferably, the flexible material layer on the outer contour of the engaging portion is made of asphalt.
Preferably, the flexible material layer on the outer contour of the seat is made of an asphalt fir board or a closed-cell foam board.
In order to ensure the inlay combination effect, the base body and the high-pressure jet grouting pile impervious wall are the same in width, and the width of the embedded part is not less than 20cm.
The invention has the remarkable effects that: the sealing reliability of the high-pressure jet grouting pile diaphragm wall and the upper hydraulic structure is improved, the high-pressure jet grouting pile diaphragm wall and the upper hydraulic structure have good adaptability to vertical and horizontal differential deformation, the safety and reliability of the diaphragm system are ensured, the construction is convenient and fast, and the high-pressure jet grouting pile diaphragm wall has wide application value in the field of hydraulic and hydroelectric engineering.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a view showing the structure of a profiled beam according to the invention.
Fig. 2 is a schematic view of a connection structure for the top of a high pressure jet grouting pile diaphragm wall according to the present invention.
Fig. 3 is an enlarged view of part of i in fig. 2.
In the figure: 1-a high-pressure jet grouting pile impervious wall; 2-profiled beams; 3-reinforcement; 4-a layer of flexible material; 5-prefabricating a plate; 6, a seat body; 7-a fitting portion; 8-upper hydraulic structure.
Detailed Description
As shown in fig. 1-3, a connection structure for the top of a high pressure jet grouting pile diaphragm wall includes an upper hydraulic structure 8 above the high pressure jet grouting pile diaphragm wall 1.
A special-shaped beam 2 is arranged between the high-pressure jet grouting pile impervious wall 1 and the upper hydraulic structure 8. The longitudinal section of the special-shaped beam 2 is in a convex shape, the horizontal part of the special-shaped beam is a seat body 6, and the vertical part of the special-shaped beam is a jogged part 7. The special-shaped beam 2 is of a reinforced concrete structure. The reinforcement 3 is provided in the profiled beam 2 at a junction area between the fitting portion 7 and the seat body 6. HPB300 is adopted for reinforcement, and the diameter is 8-12 mm.
The base 6 and the high-pressure jet grouting pile impervious wall 1 are the same in width, and the width of the embedded part 7 is not smaller than 20cm.
The upper hydraulic structure 8 is provided with a groove which can allow the embedded part 7 to be inserted.
The base 6 is fixedly connected with the top of the high-pressure jet grouting pile impervious wall 1. The fitting part 7 is fitted into a groove of the upper hydraulic structure 8.
The flexible material layer 4 is arranged on the outer contour of the special-shaped beam 2 and at any part which needs to be contacted with the upper hydraulic structure 8.
The flexible material layer 4 on the outer contour of the fitting portion 7 is made of asphalt. The flexible material layer 4 positioned on the outer contour of the embedded part 7 can ensure the closed contact of the high-pressure jet grouting pile impervious wall 1 and the upper hydraulic structure 8 under the action of vertical load, can absorb vertical and horizontal deformation, avoid the excessive differential deformation of the high-pressure jet grouting pile impervious wall 1 and the upper hydraulic structure 8, and strengthen the structural safety and reliability of the impervious wall.
The flexible material layer 4 positioned on the outer contour of the seat body 6 is made of an asphalt fir board or a closed-cell foam board. The flexible material layer 7 positioned on the outer contour of the seat body 6 can ensure the closed butt joint of the high-pressure jet grouting pile impervious wall 1 and the upper hydraulic structure 8, and simultaneously digest the vertical differential deformation of the high-pressure jet grouting pile impervious wall 1 and the upper hydraulic structure 8.
The prefabricated panel 5 is provided around the outer surface of the flexible material layer 4 at the side of the fitting portion 7. The upper end of the precast slab 5 is flush with the top of the embedded part 7, and the lower end of the precast slab is abutted against the flexible material layer 4 on the outer contour of the seat body 6.
Taking the upper hydraulic structure 8 as a concrete structure as an example, the concrete construction steps are as follows:
1) Trimming and roughening the top of the high-pressure jet grouting pile impervious wall 1;
2) Fixing templates on two sides of the high-pressure jet grouting pile diaphragm wall 1 along the axis of the high-pressure jet grouting pile diaphragm wall, binding and fixing reinforcing bars 3, and pouring concrete profiled beams 2;
3) Before the special-shaped beam 2 is initially set, the flexible material layer 4 is flatly arranged on the surface of the special-shaped beam 2;
4) After the pouring of the special-shaped beam 2 is completed (the time is not less than 1 d), cement mortar precast slabs 5 are fixed at the design positions at the two sides of the embedded part 7. The prefabricated panels 5 can be used as templates on the one hand; on the other hand, the close contact of the profiled beam 2 with the later upper hydraulic structure 8 is ensured. Then, according to actual conditions, lateral supports are made at intervals along the axial direction, and asphalt is poured into the groove;
5) And after the asphalt is basically solidified, pouring an upper hydraulic structure 8 to form a complete high-pressure jet grouting pile impervious wall 1 connecting structure.
Claims (6)
1. A connection structure for high pressure jet grouting pile diaphragm wall top, including upper portion hydraulic structure (8) that are located high pressure jet grouting pile diaphragm wall (1) top, its characterized in that: a special-shaped beam (2) is arranged between the high-pressure jet grouting pile impervious wall (1) and the upper hydraulic structure (8), and comprises a base body (6) and at least one embedded part (7) arranged on the base body (6);
the upper hydraulic structure (8) is provided with a groove which can allow the embedded part (7) to be inserted;
the base body (6) is fixedly connected with the top of the high-pressure jet grouting pile impervious wall (1), and the embedded part (7) is embedded into a groove of the upper hydraulic structure (8); the longitudinal section of the special-shaped beam (2) is in a convex shape, the horizontal part of the special-shaped beam is a seat body (6), and the vertical part of the special-shaped beam is a jogged part (7); the upper part of the seat body (6) is embedded in the special-shaped beam (2); a flexible material layer (4) which can ensure the closed butt joint of the high-pressure jet grouting pile impervious wall (1) and the upper hydraulic structure (8) is arranged between the outer contour of the seat body (6) and the upper hydraulic structure (8); a flexible material layer (4) capable of ensuring the closed butt joint of the high-pressure jet grouting pile impervious wall (1) and the upper hydraulic structure (8) under the action of vertical load is arranged between the outer contour of the embedded part (7) and the upper hydraulic structure (8).
2. The connection structure for the top of the high-pressure jet grouting pile diaphragm wall according to claim 1, wherein: the special-shaped beam (2) is of a reinforced concrete structure, and reinforcing bars (3) are arranged in the special-shaped beam (2) and in the junction area of the embedded part (7) and the seat body (6).
3. The connection structure for the top of the high-pressure jet grouting pile diaphragm wall according to claim 1, wherein: the outer surface of the flexible material layer (4) positioned on the side surface of the embedded part (7) is surrounded by a precast slab (5), the upper end of the precast slab (5) is flush with the top of the embedded part (7), and the lower end of the precast slab is abutted against the flexible material layer (4) on the outer contour of the seat body (6).
4. A connection for the top of a high pressure jet grouting pile diaphragm wall according to claim 1 or 3, wherein: the flexible material layer (4) positioned on the outer contour of the embedded part (7) is made of asphalt.
5. The connection structure for the top of the high-pressure jet grouting pile diaphragm wall according to claim 1, wherein: the flexible material layer (4) positioned on the outer contour of the seat body (6) is made of an asphalt fir board or a closed-cell foam board.
6. The connection structure for the top of the high-pressure jet grouting pile diaphragm wall according to claim 1, wherein: the base body (6) and the high-pressure jet grouting pile impervious wall (1) are the same in width, and the width of the embedded part (7) is not smaller than 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232639.0A CN108222045B (en) | 2018-03-21 | 2018-03-21 | Connection structure for top of high-pressure jet grouting pile diaphragm wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232639.0A CN108222045B (en) | 2018-03-21 | 2018-03-21 | Connection structure for top of high-pressure jet grouting pile diaphragm wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108222045A CN108222045A (en) | 2018-06-29 |
| CN108222045B true CN108222045B (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810232639.0A Active CN108222045B (en) | 2018-03-21 | 2018-03-21 | Connection structure for top of high-pressure jet grouting pile diaphragm wall |
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| Country | Link |
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| CN (1) | CN108222045B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338995B (en) * | 2018-09-28 | 2020-09-22 | 海南建拓实业有限公司 | Water-swelling rubber plate for impervious wall |
| CN111350348A (en) * | 2020-03-19 | 2020-06-30 | 中国十七冶集团有限公司 | Positioning and reinforcing device for outer wall anti-seepage inverted beam template and construction method |
| CN114673185B (en) * | 2022-04-11 | 2024-07-09 | 安徽水安建设集团股份有限公司 | Comprehensive seepage-proofing system for temporary channel construction and construction method |
| CN115030203B (en) * | 2022-07-18 | 2024-01-05 | 南京宇正建设工程有限公司 | Construction structure of high-pressure rotary spraying impervious wall and construction method thereof |
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| CN208009461U (en) * | 2018-03-21 | 2018-10-26 | 中国电建集团中南勘测设计研究院有限公司 | A kind of connection structure at the top of high-pressure rotary jet grouting pile cut-pff wall |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464048B (en) * | 2016-01-08 | 2017-07-28 | 中国电建集团华东勘测设计研究院有限公司 | The impermeable composite geomembrane structure and construction method of weir body deformation can be adapted to automatically |
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- 2018-03-21 CN CN201810232639.0A patent/CN108222045B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203144967U (en) * | 2013-03-18 | 2013-08-21 | 中国水电顾问集团成都勘测设计研究院 | Connecting structure of high earth rock cofferdam anti-seepage earth material and concrete anti-seepage wall |
| CN203222776U (en) * | 2013-04-24 | 2013-10-02 | 黄河勘测规划设计有限公司 | Connecting structure of barrage foundation diaphragm wall and gate dam building |
| CN204343251U (en) * | 2014-12-04 | 2015-05-20 | 中国电建集团贵阳勘测设计研究院有限公司 | Horizontal connection structure between concrete cut-off wall and concrete structure |
| CN106836145A (en) * | 2017-02-09 | 2017-06-13 | 河海大学 | High-tech zones cut-pff wall slides flexible connecting structure with gallery |
| CN206956669U (en) * | 2017-03-31 | 2018-02-02 | 中国电建集团华东勘测设计研究院有限公司 | A kind of attachment structure of cut-pff wall and concrete cover |
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| Publication number | Publication date |
|---|---|
| CN108222045A (en) | 2018-06-29 |
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