CN115182389B - Water seepage prevention structure at junction of new and old concrete structures of subway engineering and construction process - Google Patents
Water seepage prevention structure at junction of new and old concrete structures of subway engineering and construction process Download PDFInfo
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- CN115182389B CN115182389B CN202210870271.7A CN202210870271A CN115182389B CN 115182389 B CN115182389 B CN 115182389B CN 202210870271 A CN202210870271 A CN 202210870271A CN 115182389 B CN115182389 B CN 115182389B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 230000002265 prevention Effects 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000010426 asphalt Substances 0.000 claims abstract description 76
- 238000005253 cladding Methods 0.000 claims abstract description 67
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000005485 electric heating Methods 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000004760 aramid Substances 0.000 claims description 13
- 229920003235 aromatic polyamide Polymers 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000010345 tape casting Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000012466 permeate Substances 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Road Paving Structures (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
A water seepage prevention structure and construction process of new and old concrete structure junction of subway engineering, it is through setting up water stop steel plate and waterproof layer on the structure water facing side of new and old concrete structure junction, block the water seepage source from the root; the method is characterized in that an expansion water stop strip and a grouting pipe are arranged on the joint surface of an old concrete structure and a new concrete structure to block a water seepage passage or attenuate the water seepage pressure in the water seepage passage; the method comprises the steps of arranging a pressurized waterproof shell on the exposed side of a joint between a new concrete structure and an old concrete structure, pressurizing and filling non-cured rubber asphalt in the pressurized waterproof shell, and plugging a final exposed water seepage point; the construction process of the water seepage prevention structure at the junction of the new concrete structure and the old concrete structure of the subway engineering is characterized in that non-cured rubber asphalt is pumped into the pressurized waterproof cladding through an asphalt pump, and the non-cured rubber asphalt is utilized to permeate into a water seepage point channel to seal the water seepage point, so that the water seepage problem at the junction of the new concrete structure and the old concrete structure of the subway engineering is solved.
Description
Technical Field
The invention relates to the technical field of water seepage prevention structure design and construction methods of new and old concrete structures, in particular to a water seepage prevention structure and construction technology of a new and old concrete structure junction of subway engineering.
Background
In underground engineering structures such as subways and underground garages, the problem of the connection between new and old concrete structures is frequently encountered, and construction joints inevitably exist between the new and old concrete structures, so that when the underground water level is shallow, the water seepage problem can be generated at the construction joints; aiming at the problem, a large number of water seepage prevention structural designs at the joint of new and old concrete are proposed, but the problem is not thoroughly solved in practical engineering application; if in subway construction, the construction joint of the junction of the new concrete structure and the old concrete structure is compared with other building engineering, besides being influenced by the heat and general sedimentation of the concrete construction, the construction joint of the junction of the new concrete structure and the old concrete structure is also influenced by various factors such as deformation, sedimentation of a subway tunnel, vibration of the subway in operation and the like, and the common water seepage prevention structure design of the junction of the new concrete structure and the old concrete structure is applied to the subway engineering, and after the subway is put into operation for a certain time, the water seepage problem of the junction of the new concrete structure and the old concrete structure can occur to different degrees, so that the water seepage problem of the subway engineering is thoroughly solved, and the construction joint is a technical problem which is difficult to overcome in the industry.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a water seepage prevention structure at the junction of a new concrete structure and an old concrete structure of subway engineering, which is characterized in that a water stop steel plate and a waterproof layer are arranged on the water facing side of the structure at the junction of the new concrete structure and the old concrete structure, so that the water seepage source is blocked from the root; the method is characterized in that an expansion water stop strip and a grouting pipe are arranged on the joint surface of an old concrete structure and a new concrete structure to block a water seepage passage or attenuate the water seepage pressure in the water seepage passage; the method comprises the steps of arranging a pressurized waterproof shell on the exposed side of a joint between a new concrete structure and an old concrete structure, pressurizing and filling non-cured rubber asphalt in the pressurized waterproof shell, and sealing the final exposed water seepage points by pressurized permeation; the construction process of the water seepage prevention structure at the junction of the new concrete structure and the old concrete structure of the subway engineering is to pump non-cured rubber asphalt into the pressurized waterproof cladding through an asphalt pump, so that the non-cured rubber asphalt permeates into a water seepage point channel to block the water seepage point, and the water seepage problem at the junction of the new concrete structure and the old concrete structure of the subway engineering is solved.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: the water seepage prevention structure is characterized in that a water stop steel plate is arranged on the water facing side of the structure at the junction of the new concrete structure and the old concrete structure of the subway engineering, and a waterproof layer is arranged at the junction of the water stop steel plate and the water facing side of the structure; the structure is used for blocking water seepage at the junction of the new concrete structure and the old concrete structure, after the construction of the new concrete structure is completed, the junction of the new concrete structure and the old concrete structure of the subway engineering is necessarily provided with gaps due to the influence of various factors such as heat generated by the construction of the concrete, deformation of a subway tunnel, sedimentation, vibration during subway operation and the like, and the gaps are possibly enlarged, the effect of the gap enlargement at the junction of the new concrete structure and the old concrete structure is possibly reduced or disabled due to the influence of the gap enlargement at the junction of the new concrete structure and the old concrete structure, but the influence of a water stop steel plate and a waterproof layer arranged outside the junction of the old concrete structure and the new concrete structure is limited, so that the stability of the water seepage prevention structure at the junction of the new concrete structure of the subway engineering for a long time is ensured.
Further, on the junction surface of the old concrete structure and the new concrete structure, an expansion water stop strip and a grouting pipe are fixedly arranged, and after the expansion water stop strip is contacted with the newly poured concrete, the expansion water stop strip expands when meeting water, so as to block a water seepage passage on the junction surface or attenuate the water seepage pressure in the water seepage passage; after the new concrete structure is poured, the joint filling material is evenly injected into the joint surface through the grouting pipe, so that the water seepage passage on the joint surface is blocked.
Further, two expansion water stop strips are arranged and penetrate through the joint surface of the old concrete structure and the new concrete structure; the slip casting pipe is provided with a plurality of, and a plurality of slip casting pipe is fixed to be set up between two inflation sealing strips.
Further, a pressurizing waterproof cladding is fixedly arranged on the exposed side of the joint of the old concrete structure and the new concrete structure; a closed space is formed between the pressurized waterproof cladding and the exposed side of the joint of the new and old concrete structures, and the closed space is filled with non-cured rubber asphalt in a pressurized manner; the non-cured rubber asphalt is filled under pressure, so that the non-cured rubber asphalt is enabled to permeate into the joint surface through pressure, and the water seepage points are finally plugged.
Further, the pressurizing waterproof cladding comprises a cladding body, the cross section of the cladding body is in a trapezoid groove shape, flange edges are bent at two sides of the cladding body, the pressurizing waterproof cladding is fixedly connected with the new concrete structure through the flange edges, after the new concrete structure is constructed, gaps are necessarily formed at the joint of the new concrete structure and the old concrete structure of the subway engineering due to the influence of various factors such as concrete construction heating, subway tunnel deformation, sedimentation and vibration during subway operation, when the gap of the joint of the new concrete structure and the old concrete structure of the subway is enlarged, the waist parts at two sides of the trapezoid groove of the cross section of the cladding body are pulled to two sides, so that the height of the trapezoid groove of the cross section of the cladding body is reduced, a closed space between the pressurizing waterproof cladding and the new concrete structure and the old concrete structure is reduced, the non-cured rubber asphalt filled in the closed space is in a compression stress state, and the gap of the joint of the new concrete structure and the old concrete structure is automatically filled under the compression stress state, and the gap of the joint of the new concrete structure and the old concrete structure is enlarged is automatically repaired, and the gap of the new concrete structure and the old concrete structure is enlarged is actually completed; an electric heating pipe and a plurality of asphalt injection ports are fixedly arranged on the inner side of the trapezoid groove of the casing body, and plugs are fixedly arranged on the outer end surfaces of the asphalt injection ports; the electric heating tube heats when the non-cured rubber asphalt is injected into the pressurized waterproof shell in a pressurizing way, so that the non-cured rubber asphalt always keeps higher temperature in the injection process, and better fluidity and permeability of the non-cured rubber asphalt are maintained.
Further, a plurality of through holes are symmetrically arranged on the flange edges on two sides of the cladding body, and the through holes are used for penetrating through expansion bolts; the flange edge is fixedly provided with a leakage-proof backing plate on the contact side of the concrete structure, the leakage-proof backing plate is made of water-absorbing rubber, and the leakage-proof backing plate has good elasticity, so that the tightness between the flange edges on two sides of the cladding body and the contact surface of the concrete structure is ensured.
Further, a plurality of rivet nuts are fixedly arranged on the inner side of the trapezoid groove of the bag shell, electric heating tube fixing pieces are fixedly arranged at the end parts of the rivet nuts through bolts, and the electric heating tubes are fixedly arranged in the trapezoid groove of the bag shell through the electric heating tube fixing pieces; the outside of the casing is provided with a binding post which is electrically connected with the electric heating tube.
The construction process of the water seepage prevention structure at the junction of the new concrete structure and the old concrete structure of the subway engineering comprises the steps that the water stop steel plate and the waterproof layer are arranged before the old concrete structure is poured, namely the water stop steel plate and the waterproof layer are actually used as a part of the concrete structure of the subway engineering; the contact sides of the water stop steel plates, the old concrete structure and the new concrete structure are welded with a plurality of supporting steel bars, and the supporting steel bars are in strapping connection with steel reinforcement cages in the old concrete structure and the new concrete structure; the pressurized waterproof cladding and the non-cured rubber asphalt are arranged after the new concrete structure is poured, and the non-cured rubber asphalt in the pressurized waterproof cladding is pumped by an asphalt pump to seal water seepage points.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a water seepage prevention structure at a junction of a new concrete structure and an old concrete structure of subway engineering, which is characterized in that a water stop steel plate and a waterproof layer are arranged on a water facing side of the structure at the junction of the new concrete structure and the old concrete structure, so that a water seepage source is blocked from the root; the method is characterized in that an expansion water stop strip and a grouting pipe are arranged on the joint surface of an old concrete structure and a new concrete structure to block a water seepage passage or attenuate the water seepage pressure in the water seepage passage; the method comprises the steps of arranging a pressurized waterproof shell on the exposed side of a joint between a new concrete structure and an old concrete structure, pressurizing and filling non-cured rubber asphalt in the pressurized waterproof shell, and sealing the final exposed water seepage points by pressurized permeation; the construction process of the water seepage prevention structure at the junction of the new concrete structure and the old concrete structure of the subway engineering is characterized in that non-cured rubber asphalt is pumped into the pressurized waterproof cladding through an asphalt pump, so that the non-cured rubber asphalt permeates into a water seepage point channel to block the water seepage point, and the water seepage problem at the junction of the new concrete structure and the old concrete structure of the subway engineering is solved.
Drawings
FIG. 1 is a schematic diagram of a water seepage prevention structure at the junction of new and old concrete structures in subway engineering;
FIG. 2 is a schematic diagram II of a water seepage prevention structure at the junction of new and old concrete structures of subway engineering;
FIG. 3 is an enlarged schematic view of a part A of a water seepage prevention structure at the joint of new and old concrete structures of subway engineering;
FIG. 4 is an enlarged schematic view of a local B of a water seepage prevention structure at the junction of a new concrete structure and an old concrete structure of a subway engineering;
FIG. 5 is a schematic view of the inside structure of the pressurized waterproof enclosure;
FIG. 6 is a schematic view of the pressurized waterproof enclosure C-C in section;
FIG. 7 is a schematic view of the pressurized waterproof enclosure in section D-D;
FIG. 8 is an enlarged schematic view of a section E of the pressurized waterproof enclosure D-D;
FIG. 9 is a schematic view of the outside structure of the pressurized waterproof enclosure;
FIG. 10 is a schematic view of the actual installation of the pressurized waterproof enclosure;
FIG. 11 is a schematic sectional view of an initial state of an anti-seepage structure at the junction of a new concrete structure and an old concrete structure of a subway engineering;
fig. 12 is a schematic sectional view of a state after the water seepage prevention structure at the junction of new and old concrete structures in subway engineering is changed.
In the figure: 1. old concrete structure; 2. a new concrete structure; 3. the water facing side of the structure; 4. a water-stopping steel plate; 5. a waterproof layer; 6. expansion water stop strips; 7. grouting pipe; 8. pressurizing the waterproof cover shell; 8.1, a shell body; 8.2, asphalt injection port; 8.3, an electric heating tube; 8.4, a leakage-proof backing plate; 8.5, plugs; 8.6, riveting the nut; 8.7, fixing the electrothermal tube fixing piece; 8.8, binding posts; 9. non-cured rubber asphalt; 10. an aramid cloth; 11. and (5) plugging the baffle.
Detailed Description
The invention will be explained in more detail by the following examples, the purpose of which is to protect all technical improvements within the scope of the invention.
The water seepage prevention structure of the junction of the new concrete structure and the old concrete structure of the subway engineering is characterized in that a water stop steel plate 4 is arranged on a water facing side 3 of the structure at the junction of the old concrete structure 1 and the new concrete structure 2; a waterproof layer 5 is arranged at the joint of the water stop steel plate 4 and the water facing side 3 of the structure; an expansion water stop strip 6 and a grouting pipe 7 are fixedly arranged on the joint surface of the old concrete structure 1 and the new concrete structure 2; the expansion water stop strips 6 are provided with two strips which penetrate through the joint surface of the old concrete structure 1 and the new concrete structure 2; the grouting pipes 7 are provided with a plurality of grouting pipes 7, and the grouting pipes 7 are fixedly arranged between the two expansion water stop strips 6; a pressurized waterproof cladding 8 is fixedly arranged on the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2; a closed space is formed between the pressurized waterproof cladding 8 and the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2, and the closed space is filled with non-cured rubber asphalt 9 in a pressurized manner;
the pressurized waterproof cladding 8 comprises a cladding body 8.1, wherein the cross section of the cladding body 8.1 is in a trapezoid groove shape, and flange edges are bent at two sides; an electric heating tube 8.3 and a plurality of asphalt injection ports 8.2 are fixedly arranged on the inner side of the trapezoid groove of the casing body 8.1, and a plug 8.5 is fixedly arranged on the outer end surface of the asphalt injection port 8.2; the flange edges on two sides of the casing body 8.1 are symmetrically provided with a plurality of through holes, and the contact side of the flange edges and the concrete structure is fixedly provided with a leakage-proof base plate 8.4; a plurality of rivet nuts 8.6 are fixedly arranged on the inner side of the trapezoid groove of the shell body 8.1, electric heating tube fixing sheets 8.7 are fixedly arranged at the end parts of the rivet nuts 8.6 through bolts, and electric heating tubes 8.3 are fixedly arranged in the trapezoid groove of the shell body 8.1 through the electric heating tube fixing sheets 8.7; the outside of the casing body 8.1 is provided with a binding post 8.8, and the binding post 8.8 is electrically connected with the electric heating tube 8.3.
The construction process of the water seepage prevention structure at the junction of the new concrete structure and the old concrete structure of the subway engineering comprises the steps that the water stopping steel plate 4 and the waterproof layer 5 are arranged before the old concrete structure 1 is poured; the contact sides of the water stop steel plates 4 and the old concrete structure 1 and the new concrete structure 2 are welded with a plurality of supporting steel bars, and the supporting steel bars are in strapping connection with steel reinforcement cages in the old concrete structure 1 and the new concrete structure 2; the pressurizing waterproof cladding 8 and the non-curing rubber asphalt 9 are arranged after the new concrete structure 2 is poured, and the non-curing rubber asphalt 9 in the pressurizing waterproof cladding 8 is pumped by adopting an asphalt pump;
the pressurized waterproof jacket 8 and the non-cured rubber asphalt 9 are set after the new concrete structure 2 is poured, and the method comprises the following steps:
s1, drilling a fixing hole of a pressurized waterproof cladding 8: drilling expansion bolt holes on two sides of the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2 by using an impact drill, and installing expansion bolts;
s2, cleaning a water seepage prevention structure working surface: purging the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2 by using a high-pressure air gun, wherein the purging width is larger than the width of the pressurized waterproof cladding 8;
s3, heating and drying the water seepage structure working surface: blowing the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2 by using a hot air gun, wherein the blowing width is larger than the single side 80mm of the width of the pressurized waterproof cladding 8;
s4, spraying or knife coating a waterproof base layer: heating the non-cured rubber asphalt 9 to a liquid state, and coating the non-cured rubber asphalt 9 on the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2 by spraying or manual knife coating, wherein the coating width of the waterproof base layer is larger than the single side 80mm of the width of the pressurized waterproof cladding 8;
s5, installing and fixing a pressurized waterproof cladding 8: the pressurized waterproof cladding 8 is fixedly arranged on the exposed side of the joint of the old concrete structure 1 and the new concrete structure 2 through expansion bolts; the two ends of the pressurized waterproof cladding 8 are subjected to extension connection or plugging treatment according to the specific conditions of the site; when in extension connection, the ends of the adjacent pressurized waterproof cladding 8 are aligned to form a lap joint, the lap joint of the ends of the adjacent pressurized waterproof cladding 8 is sealed by coating non-cured rubber asphalt 9 and applying aramid cloth 10, the aramid cloth 10 is applied with two layers, the width of the aramid cloth 10 is more than 160mm, and the length of the aramid cloth 10 applied on the surfaces of the old concrete structure 1 and the new concrete structure 2 is more than 80mm; the plugging treatment is to fix a plugging baffle 11 at the end part of the pressurized waterproof cladding 8 to be plugged through bolts or welding;
s6, electrifying and preheating: after the pressurized waterproof cladding 8 is fixed, connecting the binding post 8.8 with a heating power supply to keep the electric heating tube 8.3 at 120-150 ℃;
s7, pumping non-cured rubber asphalt 9:
s7, 1: removing plugs 8.5 of all asphalt injection ports 8.2 on the pressurized waterproof cladding 8;
s7, 2: selecting an asphalt injection port 8.2 at the highest position, connecting an asphalt pump through a hose, and pumping non-cured rubber asphalt 9 into a pressurized waterproof shell 8 through the asphalt pump;
s7, 3: observing the leakage condition of the non-cured rubber asphalt 9 of all the asphalt injection openings 8.2 on the pressurized waterproof cladding 8, and installing and screwing the plugs 8.5 of the asphalt injection openings 8.2 until all the plugs 8.5 on the pressurized waterproof cladding 8 are installed and screwed when the leakage of the non-cured rubber asphalt 9 of the asphalt injection openings 8.2 is found;
s7, 4: observing leakage conditions and positions of the non-cured rubber asphalt 9 between the pressurized waterproof cladding 8 and the old concrete structure 1 and the new concrete structure 2, marking, and closing an asphalt pump and a heating power supply;
s7, 5: and sealing all the marked positions, and sealing the marked positions by coating non-cured rubber asphalt 9 and applying aramid cloth 10, wherein the aramid cloth 10 is coated with two layers.
The pressurized waterproof cladding 8 and the water seepage prevention structure of the non-cured rubber asphalt 9 filled in the pressurized waterproof cladding have excellent self-repairing property, structural strength and cohesiveness, are suitable for the waterproof structure of the junction of the new concrete structure and the old concrete structure of the newly built subway, and are also suitable for the repair of water seepage of the junction of the new concrete structure and the old concrete structure of the existing subway engineering put into operation; after the subway engineering is put into use, the electric heating tube 8.3 of the pressurized waterproof cladding 8 can be electrified and heated to 45-50 ℃ at regular intervals so as to accelerate the self-repairing process of the non-cured rubber asphalt 9.
The invention is not described in detail in the prior art.
Claims (2)
1. The utility model provides a new old concrete structure junction water seepage prevention structure of subway engineering which characterized by: a water stop steel plate (4) is arranged on a structure water facing side (3) at the joint of the old concrete structure (1) and the new concrete structure (2); a waterproof layer (5) is arranged at the joint of the water stop steel plate (4) and the water facing side (3) of the structure;
a pressurized waterproof cladding (8) is fixedly arranged on the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2); a closed space is formed between the pressurized waterproof cladding (8) and the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2), and the closed space is filled with non-cured rubber asphalt (9) in a pressurized manner; the pressurized waterproof cladding (8) comprises a cladding body (8.1), the cross section of the cladding body (8.1) is in a trapezoid groove shape, and flange edges are bent at two sides; an electric heating tube (8.3) and a plurality of asphalt injection ports (8.2) are fixedly arranged at the inner side of the trapezoid groove of the casing body (8.1), and a plug (8.5) is fixedly arranged at the outer end surface of the asphalt injection port (8.2);
an expansion water stop strip (6) and a grouting pipe (7) are fixedly arranged on the joint surface of the old concrete structure (1) and the new concrete structure (2);
the expansion water stop strips (6) are provided with two strips which penetrate through the joint surface of the old concrete structure (1) and the new concrete structure (2); the grouting pipes (7) are arranged in a plurality, and the grouting pipes (7) are fixedly arranged between the two expansion water stop strips (6);
the flange edges at two sides of the casing body (8.1) are symmetrically provided with a plurality of through holes, and the contact side of the flange edges and the concrete structure is fixedly provided with a leakage-proof base plate (8.4);
a plurality of rivet nuts (8.6) are fixedly arranged on the inner side of the trapezoid groove of the bag shell (8.1), electric heating tube fixing pieces (8.7) are fixedly arranged at the end parts of the rivet nuts (8.6) through bolts, and electric heating tubes (8.3) are fixedly arranged in the trapezoid groove of the bag shell (8.1) through the electric heating tube fixing pieces (8.7); the outside of the casing body (8.1) is provided with a binding post (8.8), and the binding post (8.8) is electrically connected with the electric heating tube (8.3).
2. A construction process of a water seepage prevention structure at a junction of a new concrete structure and an old concrete structure of a subway engineering according to claim 1, which is characterized in that: the water-stopping steel plate (4) and the waterproof layer (5) are arranged before the old concrete structure (1) is poured; a plurality of supporting steel bars are welded on the contact sides of the water stop steel plates (4) and the old concrete structure (1) and the new concrete structure (2), and the supporting steel bars are connected with steel reinforcement cages in the old concrete structure (1) and the new concrete structure (2) through binding; the pressurizing waterproof cladding (8) and the non-curing rubber asphalt (9) are arranged after the new concrete structure (2) is poured, and the non-curing rubber asphalt (9) in the pressurizing waterproof cladding (8) is pumped by adopting an asphalt pump;
the pressurized waterproof cladding (8) and the non-cured rubber asphalt (9) are filled specifically comprises the following steps:
s1, drilling a fixing hole of a pressurized waterproof cladding (8): drilling expansion bolt holes on two sides of the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2) by using an impact drill, and installing expansion bolts;
s2, cleaning a water seepage prevention structure working surface: purging the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2) by a high-pressure air gun, wherein the purging width is larger than the width of the pressurized waterproof cladding (8);
s3, heating and drying the water seepage structure working surface: blowing the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2) by using a hot air gun, wherein the blowing width is larger than the single side 80mm of the width of the pressurized waterproof cladding (8);
s4, spraying or knife coating a waterproof base layer: heating the non-cured rubber asphalt (9) to a liquid state, and coating the non-cured rubber asphalt (9) on the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2) by spraying or manual knife coating, wherein the coating width of the waterproof base layer is larger than the single side 80mm of the width of the pressurized waterproof cladding (8);
s5, installing and fixing a pressurized waterproof cladding (8): the pressurized waterproof cladding (8) is fixedly arranged on the exposed side of the joint of the old concrete structure (1) and the new concrete structure (2) through expansion bolts; the two ends of the pressurized waterproof cladding (8) are connected in an extending way or blocked according to the specific situation of the site; when in extension connection, the ends of the adjacent pressurized waterproof cladding (8) are aligned to form a lap joint, the lap joint of the ends of the adjacent pressurized waterproof cladding (8) is sealed by coating non-cured rubber asphalt (9) and applying aramid cloth (10), the aramid cloth (10) is applied with two layers, the width of the aramid cloth (10) is more than 160mm, and the length of the aramid cloth (10) applied to the surfaces of the old concrete structure (1) and the new concrete structure (2) is more than 80mm; the blocking treatment is to fix a blocking baffle (11) at the end part of the pressurized waterproof cladding (8) to be blocked through bolts or welding;
s6, electrifying and preheating: after the pressurized waterproof cladding (8) is fixed, connecting the binding post (8.8) with a heating power supply to keep the electric heating tube (8.3) at 120-150 ℃;
s7, pumping non-cured rubber asphalt (9):
s7, 1: removing plugs (8.5) of all asphalt injection ports (8.2) on the pressurized waterproof cladding (8);
s7, 2: selecting an asphalt injection port (8.2) at the highest position, connecting an asphalt pump through a hose, and pumping non-cured rubber asphalt (9) into a pressurized waterproof cladding (8) through the asphalt pump;
s7, 3: observing leakage conditions of non-cured rubber asphalt (9) of all asphalt injection openings (8.2) on the pressurized waterproof cladding (8), and installing and screwing plugs (8.5) of the asphalt injection openings (8.2) until all plugs (8.5) on the pressurized waterproof cladding (8) are installed and screwed when the non-cured rubber asphalt (9) of the asphalt injection openings (8.2) is found to be leaked;
s7, 4: observing leakage conditions and positions of non-cured rubber asphalt (9) between the pressurized waterproof cladding (8) and the old concrete structure (1) and between the pressurized waterproof cladding and the new concrete structure (2), marking, and closing an asphalt pump and a heating power supply;
s7, 5: and (3) sealing all the marked positions, and sealing the marked positions by coating non-cured rubber asphalt (9) and applying aramid cloth (10), wherein the aramid cloth (10) is coated with two layers.
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| US6769216B2 (en) * | 1999-10-18 | 2004-08-03 | Chia-Lung Lu | Process of waterproofing construction surface and slit of construction surface |
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| CN101324073A (en) * | 2008-07-23 | 2008-12-17 | 西安理工大学 | Building method of floor fissure strata tunnel deformation joint anti-seepage structure and anti-seepage structure |
| CN106284425A (en) * | 2016-08-15 | 2017-01-04 | 中国二十二冶集团有限公司 | Basement in high rise building roof deformation seam water proof structure construction method |
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