CN112921901A - Water-bedding pond bottom plate seam water stopping structure and construction method - Google Patents
Water-bedding pond bottom plate seam water stopping structure and construction method Download PDFInfo
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- CN112921901A CN112921901A CN202110133766.7A CN202110133766A CN112921901A CN 112921901 A CN112921901 A CN 112921901A CN 202110133766 A CN202110133766 A CN 202110133766A CN 112921901 A CN112921901 A CN 112921901A
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- water
- preformed groove
- grouting
- joint
- bottom plate
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000011440 grout Substances 0.000 claims abstract description 13
- 239000004593 Epoxy Substances 0.000 claims description 20
- 239000004570 mortar (masonry) Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007788 roughening Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 5
- 244000025254 Cannabis sativa Species 0.000 claims description 4
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 4
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 claims description 4
- 235000009120 camo Nutrition 0.000 claims description 4
- 235000005607 chanvre indien Nutrition 0.000 claims description 4
- 239000011487 hemp Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 17
- 239000002002 slurry Substances 0.000 description 11
- 230000007547 defect Effects 0.000 description 6
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Revetment (AREA)
Abstract
A water-stopping structure for the bottom plate joint of a water-cushioned pond and a construction method thereof comprise a joint water-stopping structure, wherein the joint water-stopping structure comprises a water-stopping belt component and a grouting component; the water stop belt assembly is arranged at the joint of the first pouring block and the second pouring block; the slip casting subassembly sets up in waterstop subassembly top, including the closed reservation groove, reservation groove one side and seam laminating, reservation groove upper end and pre-buried pipe intercommunication are installed slip casting pipe, back grout pipe in turn on the pre-buried pipe. The invention provides a bottom plate seam water stopping structure of a plunge pool and a construction method, which enable the bottom plate seam water stopping structure of the plunge pool to realize reliable water stopping, simple structure, convenient construction and improved construction efficiency.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower engineering seam water stopping, in particular to a water stopping structure for a bottom plate seam of a water-cushioned pond and a construction method.
Background
The flood-discharging, flow-raising and energy-dissipating water-cushioned pond has large water flow velocity and complex flow state, if the water-stopping effect of the concrete seam surface of the water-cushioned pond bottom plate is poor or fails, the water flow can directly drill into the water-cushioned pond bottom plate along the seam surface, and the bottom plate can bear larger raising pressure and pulsating pressure, which can cause the serious damage such as the lifting of the water-cushioned pond bottom plate; meanwhile, for the plunge pool with the drainage facility arranged at the lower part of the bottom plate, if the water stopping effect is poor or fails, the pressure of a drainage system is increased or even out of control, and the safety of other buildings is endangered. Therefore, the bottom plate seam water-stopping structure of the plunge pool and the water-stopping effect thereof are particularly important in the structural design of the plunge pool.
The flood discharge energy dissipation of the flood discharge hole of the Wudongde hydropower station adopts a trajectory energy dissipation form, a plunge pool adopts a structural form of closed pumping and drainage artificial plunge pool, the thickness of concrete of a bottom plate and a side wall is 3m, a drainage pipe network is arranged on a bedrock of the bottom, a basic drainage gallery is arranged on the periphery of the bottom plate, and a water collecting well and a pump house are arranged in the gallery and used for pumping and draining the water seepage of the bottom plate, a mountain and the bedrock. The curtain grouting is arranged around the mine foundation, so that the water seepage of the mountain and the bedrock can be effectively controlled. Therefore, the water stopping effect of the water stopping structure of the bottom plate joint is one of important factors for preventing the damage of the bottom plate and reducing the pressure of the pumping and drainage of the corridor to ensure the safety of other buildings. At present, the adopted water stopping structure is a double-layer red copper water stopping belt, and the lower layer red copper water stopping belt can play a role in strengthening the water stopping effect and remedying the failure of the upper layer water stopping caused by construction and other reasons; set up water drainage tank in the middle of the two-layer red copper waterstop, draw and arrange the infiltration through upper waterstop, prevent that the infiltration from getting into below the bottom plate, compromise the effect of stagnant water effect inspection simultaneously. The water stopping structure well overcomes some defects of other existing water stopping structures, and can achieve a good water stopping effect to a certain extent; meanwhile, the water-stopping device technically has a certain water-stopping reinforcing effect and a certain remediation space.
However, this water stop structure also has serious disadvantages in that: the upper layer red copper water stop belt has the same construction defects as the conventional red copper water stop belt, and particularly, the water stop belt is not sealed in place due to large aggregates or concentrated bleeding, so that the water stop effect is greatly influenced; secondly, the existence of the red copper waterstop at the upper layer inevitably affects the vibration quality of the concrete construction below, and can also avoid the construction defects of poor sealing and the like caused by large aggregate or concentrated bleeding, thereby affecting the water stopping effect; thirdly, the structure is complex, the construction is inconvenient, and the construction efficiency is influenced; fourthly, the check of the water stopping effect is complicated and difficult to realize, and the water stopping effect of the lower layer red copper cannot be checked.
Disclosure of Invention
The invention aims to solve the technical problem of providing a bottom plate seam water stopping structure of a water-cushioned pond and a construction method, solves the problems mentioned in the background technology, overcomes the defects, and ensures that the bottom plate seam water stopping structure of the water-cushioned pond has reliable water stopping, simple structure, convenient construction and improved construction efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a water stopping structure for a seam of a bottom plate of a water-cushioned pond comprises a water stopping belt component and a grouting component;
the water stop belt assembly is arranged at the joint of the first pouring block and the second pouring block;
the slip casting subassembly sets up in waterstop subassembly top, including the closed reservation groove, reservation groove one side and seam laminating, reservation groove upper end and pre-buried pipe intercommunication are installed slip casting pipe, back grout pipe in turn on the pre-buried pipe.
The water stop belt component comprises a red copper sheet, a water stop belt and a middle asphalt hemp thread.
The end of the preformed groove is welded and sealed through a preformed groove end cover plate, and the outer side of the preformed groove is locked and sealed through a preformed groove side cover plate and a locking nail.
The preformed groove is directly processed by angle iron, and the preformed groove end cover plate and the preformed groove side cover plate are processed by galvanized iron sheets.
The pre-buried pipe may be parallel to the vertical seam plane or at an angle.
And a gap closed groove is formed in the top end of the joint of the first pouring block and the second pouring block, and epoxy mortar is poured in the gap closed groove.
The cross section of the gap closed groove is triangular, rectangular or dovetail groove type,
a construction method for sealing up a seam of a bottom plate of a plunge pool comprises the following steps:
step 1), processing and manufacturing the water stop assembly according to the standard requirement;
step 2), manufacturing a grouting assembly; welding and sealing the end of the preformed groove on one side of the same pouring block by using a preformed groove end cover plate; holes are formed in the upper edge of the reserved groove at intervals, the holes are welded with the embedded pipe, and a temporary wood plug is plugged on the embedded pipe;
step 3), installing and preparing a warehouse by the aid of the water stop belt assembly, the first-pouring block template and the second first-pouring block template;
step 4), mounting the processed grouting assembly, and sealing the contact part of the reserved groove and the second pre-pouring block template by using an adhesive tape or rubber mud plug;
step 5), pouring concrete in the first pouring blocks, dismantling the first pouring block template and the second pouring block template after the concrete is solidified, and timely roughening the surfaces of the parts, which need to be refilled with epoxy mortar, at the top of the joint surface;
step 6), closing the preformed groove by using a preformed groove side cover plate and a locking nail, and closing the contact part of the preformed groove and the preformed groove side cover plate by using an adhesive tape or rubber mud plug;
step 7), carrying out post-casting block preparation, post-casting block template installation and post-casting block concrete pouring;
step 8), removing the post-cast block template after the post-cast block concrete is condensed, and timely roughening the surface of the part of the top of the joint surface needing to be backfilled with epoxy mortar;
step 9), after the internal temperature of the concrete is stable, backfilling the top of the joint surface with epoxy mortar;
step 10), after the strength of epoxy mortar meets the requirement, pulling out a temporary wooden plug at the upper end of the embedded pipe, respectively and correspondingly connecting a grouting pipe and a slurry return pipe, grouting through the grouting pipe, exhausting through the slurry return pipe, controlling and maintaining a certain grouting pressure through a slurry stop valve, performing joint and contact grouting between concrete blocks and between concrete and a water stop belt component, and stopping grouting after the slurry consumption of a joint surface is basically stable;
and 11), repairing the orifice part of the through-flow surface embedded pipe by using epoxy mortar.
The invention relates to a bottom plate seam water stop structure of a water-filled pond and a construction method, which have the following technical effects:
1) and because the large concrete aggregate is difficult to control, the phenomenon of concrete bleeding cannot be avoided, the contact between the concrete and the conventional water stop belt cannot be completely compact, and the reliability of water stop is reduced. Through setting up the embedded pipe, the preformed groove, can be to between the concrete piece, carry out seam and contact grout between concrete and the red copper waterstop, can overcome the construction defect that former design and current conventional red copper stagnant water structure exist, ensure between the concrete piece, the contact is closely knit between concrete and the waterstop, and then strengthen the stagnant water effect, ensure that the stagnant water is reliable (after concrete placement has a period of time, generally there is the gap between preformed groove apron and the concrete, between concrete and the waterstop and between concrete piece and the concrete piece, can grout, ensure closely knit between them.
2) Compare current red copper stagnant water structure, this stagnant water structure can realize strengthening the stagnant water effect, remedy the construction defect, accomplish purpose such as stagnant water is reliable, can accomplish simple structure again, and construction convenience effectively improves the efficiency of construction.
3) The epoxy mortar on the top of the seam surface has the functions of creating the seam surface grouting sealing condition and repairing the seam passing part on the overflowing surface.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a front view (first type) of the present invention.
Fig. 2 is a schematic plan view (first type) of the present invention.
Fig. 3 is a front view of the present invention (second type).
Fig. 4 is a schematic plan view (second type) of the present invention.
In the figure: the concrete pouring device comprises a red copper sheet 1, a water stop belt 2, asphalt hemp threads 3, a reserved groove 4, a pre-buried pipe 5, a temporary wood plug 6, a grouting pipe 7, a grout return pipe 8, a grout stop valve 9, a reserved groove side cover plate 10, a locking nail 11, plasticine 12 or an adhesive tape, a first pouring block template 13, a second pouring block template 14, a later pouring block template 15, a reserved groove end cover plate 16, a first pouring block 17, an later pouring block 18 and epoxy mortar 19.
Detailed Description
As shown in fig. 1, a water stopping structure for the bottom plate joint of a water lagoon comprises a water stopping belt assembly and a grouting assembly;
the water stop belt assembly is arranged at the joint of the first pouring block 17 and the second pouring block 18; the water stop component consists of a red copper sheet 1, a water stop 2 and a middle asphalt hemp thread 3. The structure has the advantages of strong adaptive deformation capability and good water stopping effect.
The grouting assembly is arranged above the water stop assembly and comprises a closable preformed groove 4, the preformed groove 4 is formed by directly processing angle iron, and the cross section in the drawing is triangular. In addition, the preformed groove 4 can also adopt other structures with different forms such as round, square and the like. The end of the preformed groove 4 is welded and sealed through a preformed groove end cover plate 16, and the outer side of the preformed groove 4 is locked and sealed through a preformed groove side cover plate 10 and a locking nail 11. Thus, the preformed groove 4 forms a groove body structure with a closed cavity inside. The higher authority trompil of preformed groove 4 and with pre-buried pipe 5 welding, its effect lies in forming the slip casting pipeline, provides the pipeline passageway for the seam and contact grout between the concrete piece, between concrete and the waterstop.
The embedded pipe 5 is a steel pipe, an orifice at the upper end of the embedded pipe 5 is sealed by a temporary wood plug 6 before grouting, so that sundries are prevented from blocking the pipeline, and the angle of the embedded pipe 5 can be parallel to a vertical seam surface or form a certain angle; during grouting, the grouting pipe 7 is connected with the embedded pipe 5 for grouting, then the grouting pipe passes through the other embedded pipe 5 to the slurry return pipe 8, and the slurry stop valve 9 is arranged on the slurry return pipe 8.
The top end of the joint of the first pouring block 17 and the second pouring block 18 is provided with a seam passing closed groove, and the cross section of the seam passing closed groove in the figure is triangular. But may also be rectangular, dovetail slot, or other shapes. And epoxy mortar 19 is poured in the gap sealing groove, and the main functions are to create a gap surface grouting sealing condition and repair the gap part on the overflowing surface.
A construction method for sealing up a seam of a bottom plate of a plunge pool comprises the following steps:
step 1), processing and manufacturing the water stop assembly according to the standard requirement;
step 2), manufacturing a grouting assembly; welding and sealing the end of the preformed groove 4 on one side of the same pouring block by using a preformed groove end cover plate 16; holes are formed in the upper side of the reserved groove 4 at intervals (the hole interval can be about 2m, the number of the holes is determined according to the size of a concrete block, at least two holes are formed, grouting holes and grout returning holes are arranged alternately), the holes are welded with the embedded pipe 5, and the temporary wood plug 6 is plugged at the upper end of the embedded pipe 5;
step 3), installing and preparing a warehouse by the aid of the water stop belt assembly, the first-pouring block template 13 and the second first-pouring block template 14;
step 4), installing the processed preformed groove 4 and the pre-buried pipe 5, and sealing the contact part of the preformed groove 4 and the second pre-cast block template 14 by using an adhesive tape or a rubber mud plug 12;
step 5), pouring the first cast block concrete, removing the first cast block template 13 and the second cast block template 14 after the concrete is solidified, and timely roughening the surface of the part of the top of the joint surface needing to be backfilled with epoxy mortar;
step 6), sealing the preformed groove 4 by using a preformed groove side cover plate 10 and a locking nail 11, and sealing the contact part of the preformed groove 4 and the preformed groove side cover plate 10 by using an adhesive tape or a rubber plug 12;
step 7), carrying out post-casting block 18 storage, post-casting block template 15 installation and post-casting block concrete pouring;
step 8), removing the post-cast block template 15 after the post-cast block concrete is condensed, and timely roughening the surface of the part of the top of the seam surface needing to be backfilled with epoxy mortar;
step 9), after the internal temperature of the concrete is stable, backfilling the top of the joint surface by using epoxy mortar 19;
step 10), after the strength of the epoxy mortar 19 meets the requirement, pulling out a temporary wooden plug 6 at the upper end of the embedded pipe 5, respectively connecting a grouting pipe 7 and a slurry return pipe 8 correspondingly, grouting through the grouting pipe 7, exhausting through the slurry return pipe 8, controlling and maintaining a certain grouting pressure through a slurry stop valve 9, performing joint and contact grouting between concrete blocks and between the concrete and a water stop component, and stopping grouting after the slurry consumption of a joint surface is basically stable;
and 11), repairing the orifice part of the through-flow surface embedded pipe by using epoxy mortar.
Claims (8)
1. The utility model provides a water-bedding pool bottom plate seam stagnant water structure which characterized in that: the grouting device comprises a water stop belt assembly and a grouting assembly;
the water stop belt assembly is arranged at the joint of the first pouring block (17) and the second pouring block (18);
the grouting assembly is arranged above the water stop assembly and comprises a closable preformed groove (4), one side of the preformed groove (4) is attached to a joint, the upper end of the preformed groove (4) is communicated with a pre-buried pipe (5), and a grouting pipe (7) and a grout return pipe (8) are alternately arranged on the pre-buried pipe (5).
2. The water stopping structure for the bottom plate joint of the water lagoon as claimed in claim 1, wherein: the water stop assembly comprises a red copper sheet (1), a water stop (2) and a middle asphalt hemp thread (3).
3. The water stopping structure for the bottom plate joint of the water lagoon as claimed in claim 1, wherein: the end of the preformed groove (4) is welded and sealed through a preformed groove end cover plate (16), and the outer side of the preformed groove (4) is locked and sealed through a preformed groove side cover plate (10) and a locking nail (11).
4. The water stopping structure for the bottom plate joint of the water lagoon as claimed in claim 3, wherein: the preformed groove (4) is directly processed by angle iron, and the preformed groove end cover plate (16) and the preformed groove side cover plate (10) are processed by galvanized iron sheets.
5. The water stopping structure for the bottom plate joint of the water lagoon as claimed in claim 1, wherein: the embedded pipe (5) can be parallel to the vertical seam surface or form a certain angle.
6. The water stopping structure for the bottom plate joint of the water lagoon as claimed in claim 1, wherein: and a seam passing closed groove is formed in the top end of the seam of the first pouring block (17) and the second pouring block (18), and epoxy mortar (19) is poured in the seam passing closed groove.
7. The water stopping structure for the bottom plate joint of the water lagoon as claimed in claim 6, wherein: the cross section of the gap closed groove is triangular, rectangular or dovetail groove type.
8. The construction method for sealing off the joints of the bottom plates of the water lagoons according to the water-sealing structure of the bottom plates of the water lagoons of claims 1 to 7 comprises the following steps:
step 1), processing and manufacturing the water stop assembly according to the standard requirement;
step 2), manufacturing a grouting assembly; welding and sealing the end of the preformed groove (4) on one side of the same pouring block by using a preformed groove end cover plate (16); holes are formed in the upper side of the reserved groove (4) at intervals, the holes are welded with the embedded pipe (5), and the temporary wooden plug (6) is plugged at the upper end of the embedded pipe (5);
step 3), installing and preparing a warehouse by the aid of the water stop belt assembly, the first pouring block template (13) and the second first pouring block template (14);
step 4), mounting the processed grouting assembly, and sealing the contact part of the reserved groove (4) and the second pre-cast block template (14) by using an adhesive tape or a rubber mud plug (12);
step 5), pouring concrete in the first pouring blocks, removing the first pouring block template (13) and the second pouring block template (14) after the concrete is solidified, and timely roughening the surfaces of the parts, which need to be backfilled with epoxy mortar, at the top of the joint surfaces;
step 6), sealing the preformed groove (4) by using a preformed groove side cover plate (10) and a locking nail (11), and sealing the contact part of the preformed groove (4) and the preformed groove side cover plate (10) by using an adhesive tape or a rubber mud plug (12);
step 7), carrying out post-casting block (18) preparation, post-casting block template (15) installation and post-casting block concrete pouring;
step 8), removing the post-cast block template (15) after the post-cast block concrete is condensed, and timely roughening the surface of the part of the top of the seam surface needing to be backfilled with epoxy mortar;
step 9), after the internal temperature of the concrete is stable, the top of the joint surface is backfilled with epoxy mortar (19);
step 10), after the strength of epoxy mortar (19) meets the requirement, pulling out a temporary wood plug (6) at the upper end of a pre-buried pipe (5), respectively and correspondingly connecting a grouting pipe (7) and a grout return pipe (8), grouting through the grouting pipe (7), exhausting through the grout return pipe (8), controlling and maintaining a certain grouting pressure through a grout stop valve (9), performing joint and contact grouting between concrete blocks and between concrete and a water stop belt component, and stopping grouting after the grout consumption of a joint surface is basically stable;
and 11), repairing the orifice part of the through-flow surface embedded pipe by using epoxy mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110133766.7A CN112921901A (en) | 2021-02-01 | 2021-02-01 | Water-bedding pond bottom plate seam water stopping structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110133766.7A CN112921901A (en) | 2021-02-01 | 2021-02-01 | Water-bedding pond bottom plate seam water stopping structure and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN112921901A true CN112921901A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110133766.7A Pending CN112921901A (en) | 2021-02-01 | 2021-02-01 | Water-bedding pond bottom plate seam water stopping structure and construction method |
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| CN (1) | CN112921901A (en) |
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|---|---|---|---|---|
| US4154041A (en) * | 1976-08-25 | 1979-05-15 | Soletanche S.A. | Wall with extensible joints between panels |
| CN202626994U (en) * | 2012-06-04 | 2012-12-26 | 中国水电顾问集团西北勘测设计研究院 | Normal concrete arch dam joint grouting groove and pipe combined exhaust system |
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| CN205975506U (en) * | 2016-08-16 | 2017-02-22 | 中国电建集团华东勘测设计研究院有限公司 | A stagnant water structure for water conservancy project concrete movement joint |
| CN106930237A (en) * | 2017-05-09 | 2017-07-07 | 中国葛洲坝集团国际工程有限公司 | A kind of dam joint grouting fills construction method again |
| CN206721823U (en) * | 2017-05-09 | 2017-12-08 | 中国葛洲坝集团国际工程有限公司 | Pore structure is reserved in a kind of dam joint grouting |
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-
2021
- 2021-02-01 CN CN202110133766.7A patent/CN112921901A/en active Pending
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|---|---|---|---|---|
| US4154041A (en) * | 1976-08-25 | 1979-05-15 | Soletanche S.A. | Wall with extensible joints between panels |
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Application publication date: 20210608 |
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| RJ01 | Rejection of invention patent application after publication |