CN112982497A - High-performance connecting structure for joint parts of new concrete and old concrete and construction method - Google Patents
High-performance connecting structure for joint parts of new concrete and old concrete and construction method Download PDFInfo
- Publication number
- CN112982497A CN112982497A CN202110335717.1A CN202110335717A CN112982497A CN 112982497 A CN112982497 A CN 112982497A CN 202110335717 A CN202110335717 A CN 202110335717A CN 112982497 A CN112982497 A CN 112982497A
- Authority
- CN
- China
- Prior art keywords
- concrete
- new
- old
- waterproof
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
Abstract
The invention provides a high-performance connecting structure for a joint part of old and new concrete, which comprises the old concrete, wherein one side of the old concrete is connected with the new concrete; the bottoms of the old concrete and the new concrete are provided with a substrate waterproof layer; filling a middle waterproof layer in a trapezoidal groove on the side surface of the old concrete connected with the new concrete; filling new concrete in the wedge-shaped gap at the bottom of the old concrete; a water stopping groove for placing a water stopping strip is formed at the joint of the old concrete and the new concrete, and the water stopping groove is positioned above the trapezoidal groove; and a concrete joint self-waterproof layer is coated on the side surface of the old concrete. The invention also provides a construction method of the high-performance connecting structure at the joint part of the new concrete and the old concrete, which comprises the following steps: crushing old concrete; constructing a waterproof layer of a substrate; constructing a middle waterproof layer; constructing a self-waterproof layer of the concrete joint; and sticking the water-swelling water stop strip when meeting water. The invention has the characteristics of waterproof joint, excellent connection performance, low overall manufacturing cost, flexible and adjustable working procedures, wider application range and the like.
Description
Technical Field
The invention relates to the technical field of concrete waterproofing, in particular to a high-performance connecting structure for a new concrete joint part and an old concrete joint part and a construction method.
Background
Due to the discontinuity of the structural form and the material, the mechanical property of the interface of the new cast-in-place concrete joint and the old cast-in-place concrete joint is poor, tension and compression cracks are easy to generate, and further the leakage of an underground structure is easy to induce under high water pressure. Scholars at home and abroad conduct numerous researches on detailed waterproof structures of underground structures at joints of structures such as construction joints and the like, and provide a multi-layer waterproof joint concept, namely, leakage hidden danger at joints of new and old cast-in-place concrete is solved by setting a plurality of waterproof control schemes.
The detailed joint water prevention of the new concrete and the old concrete is the same as the construction joint water prevention measures, and the water stop belt, the water stop strip, the caulking material, the sealing material, the waterproof coating and the like are used for realizing the water prevention treatment at the weak interface. However, because of the factors such as large difference of material properties and poor interface adhesion of new and old concrete interfaces, a more reliable seam treatment scheme needs to be provided in a targeted manner to ensure the reliability and durability of engineering waterproofing.
In view of the above, a high-performance connection structure and a construction method for new and old concrete joint portions are urgently needed to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a high-performance connecting structure for a new concrete joint part and an old concrete joint part and a construction method, and solves the problem that the existing new and old cast-in-place concrete joint is difficult to ensure waterproof reliability and durability under high osmotic pressure.
In order to achieve the purpose, the invention provides a high-performance connecting structure for a joint part of old and new concrete, which comprises the old concrete, wherein one side of the old concrete is connected with the new concrete; the bottoms of the old concrete and the new concrete are provided with a substrate waterproof layer; the side surface of the old concrete, which is connected with the new concrete, is provided with a trapezoidal groove, and a middle waterproof layer is filled in the trapezoidal groove; the bottom of the old concrete is a wedge-shaped gap, and the wedge-shaped gap is filled with new concrete; a water stopping groove is formed at the joint of the old concrete and the new concrete, is positioned above the trapezoidal groove and is used for placing a water stopping strip; and a concrete joint self-waterproof layer is coated on the side surface where the old concrete and the new concrete are connected.
Further, the substrate waterproof layer comprises an upper concrete cushion layer, a lower concrete cushion layer, a waterproof coiled material and a substrate water stop belt; the lower concrete cushion layer, the waterproof coiled material and the base water stop are sequentially laid from bottom to top, and the base water stop is positioned below the new concrete at the wedge-shaped gap; the upper concrete cushion layer is laid on the lower concrete cushion layer and is positioned around the waterproof coiled material and the base water stop belt for protecting the waterproof coiled material and the base water stop belt.
Furthermore, the waterproof roll material is a thermoplastic polyolefin waterproof roll material or a macromolecular self-adhesive film waterproof roll material, two adjacent waterproof roll materials are overlapped by an upper layer and a lower layer in a staggered joint mode, and the overlapping width is not less than 100 mm.
Further, the base water stop belt is a back-attached rubber water stop belt.
Furthermore, the self-waterproof layer of the concrete joint adopts cement-based capillary crystalline waterproof coating or cement paste which has the same mixing ratio with new concrete and is doped with 10% of U-shaped expanding agent.
Furthermore, the middle waterproof layer comprises high-performance self-compacting concrete and a buried water stop embedded in the high-performance self-compacting concrete.
Further, the end of the medium-buried water stop belt is wrapped with the water-swelling putty block; the buried water stops are lapped by using a rivet, and butyl rubber putty is clamped between the two lapped buried water stops.
Further, the water stop strip adopts a water-swelling rubber strip.
The invention also provides a construction method of the high-performance connecting structure at the joint part of the new concrete and the old concrete, which comprises the following steps:
the method comprises the following steps: crushing and dismantling old concrete: statically crushing an original structure section, chiseling a trapezoidal groove in the middle of an old concrete structure, chiseling a wedge-shaped notch at the bottom of the old concrete structure, and reserving a water stopping groove at the interface of new concrete and the old concrete;
step two: constructing a waterproof layer of a substrate: constructing an upper concrete cushion layer and a lower concrete cushion layer in the wedge-shaped gap, paving and pasting a waterproof coiled material and a base water stop; the newly laid waterproof coiled material needs to be lapped on the coiled material of the original waterproof layer, and the joint bonding of the coiled material is well carried out;
step three: construction of a middle waterproof layer: pouring high-performance self-compacting concrete in the trapezoid groove, and installing a buried water stop belt in the trapezoid groove;
step four: constructing a concrete joint self-waterproof layer on the side surface where the old concrete and the new concrete are connected;
step five: bonding a water stop strip at a water stop groove reserved in the water stop strip;
step six: and pouring new concrete to complete the sealing of the four anti-seepage water-stop lines.
Further, in the fourth step, the construction of the self-waterproof layer of the concrete joint comprises the following steps:
cleaning a matrix: carrying out sand blasting or high-pressure water gun roughening treatment on the old concrete section to enhance the roughness of a concrete connection interface;
secondly, matrix water saturation treatment: spraying the old concrete section for 24h by using a spraying device to ensure that the surface of the old concrete is in a water-saturated state, and then naturally airing the surface;
thirdly, processing an interfacial agent: before the new concrete is poured, a cement-based permeable crystalline waterproof coating or a cement paste which has the same mixing ratio with the new concrete and is doped with 10 percent of U-shaped expanding agent is coated on a connecting interface, and the thickness of the coating is controlled to be 0.5 mm-1.5 mm.
The technical scheme of the invention has the following beneficial effects:
(1) the joint has excellent waterproof performance. According to the invention, four water-stop waterproof lines are constructed along an underground water permeation path by arranging the base waterproof layer, the concrete joint self-waterproof layer, the middle waterproof layer and the water-stop strips, and the joint part has excellent anti-permeability performance.
(2) The joint connection performance is excellent. The sand blasting/chiseling treatment is carried out on the connection interface of the new concrete and the old concrete, and the excellent self-repairing healing performance of the cement-based permeable crystalline waterproof coating improves the anti-permeability performance and the mechanical property of the joint and effectively prevents the joint from cracking in the later period.
(3) The whole cost is low. The self-waterproof layer and the middle waterproof layer are used as main water-stop waterproof lines, a small amount of high-cost waterproof paint and high-performance concrete are locally used in construction, and the overall cost is controlled in a lower range.
(4) The construction is convenient and fast, and the bottom crossing on site is easy. This joint structure need not to use special instrument and the construction that becomes more meticulous is controlled, only can construct through the instrument of picking the chisel and pouring the template commonly used, and the construction operation degree of difficulty that has effectively reduced is convenient for the site operation to hand over end and quality and is controlled.
(5) The working procedure is flexible and adjustable. Has sufficient waterproof allowance, and can flexibly and properly delete part of procedures according to the field condition in actual construction.
(6) Has wide application range. The construction method can be used for the joint parts of new and old concrete, and can also be used for the construction joints, post-cast strips and other parts of large underground engineering.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is an overall schematic view of a high performance joint construction for new and old concrete joint locations;
FIG. 2 is an enlarged partial schematic view of A of FIG. 1;
the waterproof structure comprises a base waterproof layer 1, an upper concrete cushion layer 11, a waterproof coiled material 12, a base water stop belt 13, a lower concrete cushion layer 14 and a waterproof layer, wherein the base waterproof layer is arranged on the upper concrete cushion layer; 2. the concrete joint is self-waterproof; 3-middle waterproof layer 31, self-compacting concrete 32, middle buried water stop; 4. a water stop bar; 5. old concrete; 6. new concrete.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1 and 2, a high-performance connection structure for a joint part of old and new concrete comprises old concrete 5, wherein one side of the old concrete 5 is connected with new concrete 6; the bottom parts of the old concrete 5 and the new concrete 6 are provided with a base waterproof layer 1 for resisting the infiltration and corrosion of most underground water and constructing a waterproof first defense line of the new and old concrete joints; the side face of the old concrete 5 connected with the new concrete 6 is provided with a trapezoidal groove, and a middle waterproof layer 3 is filled in the trapezoidal groove and used for resisting a small amount of underground water permeating into the joint gap and constructing a waterproof main defense line of the new and old concrete joint; the bottom of the old concrete 5 is a wedge-shaped gap, and the wedge-shaped gap is filled with new concrete 6; a water stopping groove is formed at the joint of the old concrete 5 and the new concrete 6, is positioned above the trapezoidal groove (namely the tail end of the new and old concrete pouring seam) and is used for placing a water stopping strip 4, so that the problem that underground water is blocked in place due to poor control or extreme underground environment caused by construction quality is avoided, and a waterproof saturated defense line of the new and old concrete joint is constructed; and the side surface of the old concrete 5 connected with the new concrete 6 is coated with a concrete joint self-waterproof layer 2, so that a main waterproof defense line of the new and old concrete joint is constructed.
As shown in fig. 2, the base waterproof layer 1 includes an upper concrete cushion layer 11, a waterproof roll 12, a base water stop 13 and a lower concrete cushion layer 14; the lower concrete cushion layer 14, the waterproof coiled material 12 and the base water stop belt 13 are sequentially laid from bottom to top, and the base water stop belt 13 is positioned below the new concrete 6 at the wedge-shaped gap; the concrete cushion layer is 200mm thick in total, wherein the lower concrete cushion layer 14 is 150mm thick and is poured before the waterproof roll material 12 is paved, the upper concrete cushion layer 11 is 50mm thick and is fine stone concrete, the fine stone concrete is positioned around the waterproof roll material 12 and the base water stop belt 13, and the fine stone concrete is poured after the waterproof roll material 12 is paved and is used as a protective layer of the roll material.
The waterproof roll material 12 is a thermoplastic polyolefin waterproof roll material or a macromolecule self-adhesive film waterproof roll material, two adjacent waterproof roll materials 12 are overlapped by an upper layer and a lower layer in a staggered joint mode, the overlapping joint needs to be fully adhered, and the overlapping joint width is 100 mm.
The base water stop 13 is a back-attached rubber water stop. And a fixing measure is taken when the back-pasted rubber water stop is laid, so that the back-pasted rubber water stop is prevented from displacing when concrete is poured.
The concrete joint self-waterproof layer 2 adopts cement-based capillary crystalline waterproof coating or cement paste which has the same mixing ratio with new concrete and is doped with 10% of U-shaped expanding agent, and the thickness of the coating is controlled to be 0.5-1.5 mm. The interface agent improves the pouring and connecting quality of new and old concrete, avoids the joint cracking phenomenon in the curing and operating processes, and enhances the mechanical property and the impermeability of the joint.
The middle waterproof layer 3 comprises high-performance self-compacting concrete 31 and a middle-buried water stop 32 pre-buried in the high-performance self-compacting concrete 31; the high-performance self-compacting concrete 31 may be blended with, for example, 0.7% of a cement-based permeable crystalline type waterproof material in order to improve the impermeability, in addition to the micro-expansive properties. After the embedded water stop 32 is fixed in the trapezoid groove, high-performance self-compacting concrete 31 is poured.
The buried water stop 32 is a steel-edged rubber water stop. Before the self-compacting concrete 31 and the new concrete 6 are poured, the end of the buried water stop 32 is wrapped with a water-swelling putty block with the thickness of 10mm, and the putty block exceeds the end part of the steel-edge water stop by 5 mm. The buried water stop 32 is lapped by using a rivet, the lapping length is not less than 100mm, and butyl rubber putty with the thickness of 1.5mm is clamped between two overlapped steel plates.
The cross section of the water-swelling water stop strip 4 is 20 mm-30 mm, the water-swelling water stop strip is stuck in a groove which is cut in advance, and half volume of the water-swelling water stop strip is reserved and poured in new concrete 6.
A construction method of a high-performance connecting structure at a joint part of new and old concrete is characterized by comprising the following steps:
the method comprises the following steps: and (3) crushing and dismantling old concrete 5: statically crushing an original structure section, chiseling a trapezoidal groove in the middle of an old concrete 5 structure, chiseling a wedge-shaped notch at the bottom (namely the water facing side) of the old concrete 5 structure, and reserving a water stopping groove at the interface of new concrete 6 and the old concrete 5;
step two: constructing a substrate waterproof layer 1: constructing an upper concrete cushion layer 11, a lower concrete cushion layer 11, a paving waterproof coiled material 12 and a base water stop belt 13 in the wedge-shaped gap; the newly laid waterproof roll material 12 needs to be lapped on the original waterproof roll material, and the joint bonding of the roll material is well carried out;
step three: construction of a middle waterproof layer 3: pouring high-performance self-compacting concrete 31 in the trapezoid groove, and installing a buried water stop 32 in the high-performance self-compacting concrete; the end of the buried water stop 32 is wrapped with a water swelling putty block with the thickness of 10mm, and the putty block exceeds the end part of the steel edge water stop by 5 mm. The buried water stop 32 is lapped by using a rivet, the lapping length is not less than 100mm, and butyl rubber putty with the thickness of 1.5mm is clamped between two overlapped steel plates.
Step four: constructing a concrete joint self-waterproof layer 2 on the side surface where the old concrete 5 is connected with the new concrete 6; the construction of the self-waterproof layer 2 of the concrete joint comprises the following steps:
cleaning a matrix: carrying out sand blasting or high-pressure water gun roughening treatment on the section of the old concrete 5 so as to enhance the roughness of a concrete connection interface;
secondly, matrix water saturation treatment: spraying the section of the old concrete 5 for 24 hours by using a spraying device to ensure that the surface of the old concrete 5 is in a water-saturated state, and then naturally airing the surface;
thirdly, processing an interfacial agent: before the new concrete 6 is poured, a cement-based permeable crystalline waterproof coating or a cement paste which has the same mixing ratio as the new concrete 6 and is doped with 10 percent of U-shaped expanding agent is coated on a connecting interface, and the thickness of the coating is controlled to be 0.5 mm-1.5 mm.
Step five: and (3) constructing a water-swelling water stop strip 4: the water stop strip 4 is bonded at the water stop groove reserved in the water stop strip 4; the cross section of the water stop strip 4 is 20mm x 30mm, and the distance from the water stop strip to the back surface of the concrete is 10-15 cm.
Step six: and pouring new concrete 6 to complete the sealing of the four anti-seepage water-stop lines.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high-performance connecting structure for a joint part of old and new concrete comprises the old concrete, wherein one side of the old concrete is connected with the new concrete; the concrete is characterized in that the bottoms of old concrete and new concrete are provided with a substrate waterproof layer; the side surface of the old concrete, which is connected with the new concrete, is provided with a trapezoidal groove, and a middle waterproof layer is filled in the trapezoidal groove; the bottom of the old concrete is a wedge-shaped gap, and the wedge-shaped gap is filled with new concrete; a water stopping groove is formed at the joint of the old concrete and the new concrete, is positioned above the trapezoidal groove and is used for placing a water stopping strip; and a concrete joint self-waterproof layer is coated on the side surface where the old concrete and the new concrete are connected.
2. The high-performance connecting structure for the joint parts of new and old concrete according to claim 1, wherein the base waterproof layer comprises an upper concrete cushion layer, a lower concrete cushion layer, a waterproof roll and a base water stop belt; the lower concrete cushion layer, the waterproof coiled material and the base water stop are sequentially laid from bottom to top, and the base water stop is positioned below the new concrete at the wedge-shaped gap; the upper concrete cushion layer is laid on the lower concrete cushion layer and is positioned around the waterproof coiled material and the base water stop belt for protecting the waterproof coiled material and the base water stop belt.
3. The high-performance connecting structure for the joint part of new and old concrete as claimed in claim 2, wherein the waterproof roll is a thermoplastic polyolefin waterproof roll or a high-molecular self-adhesive film waterproof roll, two adjacent waterproof rolls are overlapped by an upper layer and a lower layer at staggered joints, and the overlapping width is not less than 100 mm.
4. The high-performance connecting structure for the joint part of new and old concrete as claimed in claim 3, wherein the base water stop is a back-attached rubber water stop.
5. The high-performance connecting structure for the joint parts of new and old concrete as claimed in claim 2, wherein the self-waterproof layer of the concrete joint is made of a cement-based permeable crystallization type waterproof coating or a cement paste which has the same mixing ratio with new concrete and is doped with 10% of a U-shaped expanding agent.
6. The high-performance connecting structure for the joint parts of old and new concrete as claimed in claim 5, wherein the middle waterproof layer comprises high-performance self-compacting concrete and a buried water stop embedded in the high-performance self-compacting concrete.
7. The high-performance connecting structure for the joint parts of new and old concrete as claimed in claim 6, wherein the end of the buried water stop belt is wrapped with the water-swelling putty block; the buried water stops are lapped by using a rivet, and butyl rubber putty is clamped between the two lapped buried water stops.
8. The high-performance connecting structure for the new and old concrete joint parts according to any one of claims 1 to 7, wherein the water stopping strip is a water-swellable rubber strip.
9. A construction method of a high-performance connection structure of new and old concrete joint portions according to any one of claims 1 to 8, characterized by comprising the steps of:
the method comprises the following steps: crushing and dismantling old concrete: statically crushing an original structure section, chiseling a trapezoidal groove in the middle of an old concrete structure, chiseling a wedge-shaped notch at the bottom of the old concrete structure, and reserving a water stopping groove at the interface of new concrete and the old concrete;
step two: constructing a waterproof layer of a substrate: constructing an upper concrete cushion layer and a lower concrete cushion layer in the wedge-shaped gap, paving and pasting a waterproof coiled material and a base water stop; the newly laid waterproof coiled material needs to be lapped on the coiled material of the original waterproof layer, and the joint bonding of the coiled material is well carried out;
step three: construction of a middle waterproof layer: pouring high-performance self-compacting concrete in the trapezoid groove, and installing a buried water stop belt in the trapezoid groove;
step four: constructing a concrete joint self-waterproof layer on the side surface where the old concrete and the new concrete are connected;
step five: bonding a water stop strip at a water stop groove reserved in the water stop strip;
step six: and pouring new concrete to complete the sealing of the four anti-seepage water-stop lines.
10. The construction method of the high-performance connecting structure for the new and old concrete joint parts according to claim 9, wherein in the fourth step, the construction of the self-waterproof layer of the concrete joint comprises the following steps:
cleaning a matrix: carrying out sand blasting or high-pressure water gun roughening treatment on the old concrete section to enhance the roughness of a concrete connection interface;
secondly, matrix water saturation treatment: spraying the old concrete section for 24h by using a spraying device to ensure that the surface of the old concrete is in a water-saturated state, and then naturally airing the surface;
thirdly, processing an interfacial agent: before the new concrete is poured, a cement-based permeable crystalline waterproof coating or a cement paste which has the same mixing ratio with the new concrete and is doped with 10 percent of U-shaped expanding agent is coated on a connecting interface, and the thickness of the coating is controlled to be 0.5 mm-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110335717.1A CN112982497A (en) | 2021-03-29 | 2021-03-29 | High-performance connecting structure for joint parts of new concrete and old concrete and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110335717.1A CN112982497A (en) | 2021-03-29 | 2021-03-29 | High-performance connecting structure for joint parts of new concrete and old concrete and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112982497A true CN112982497A (en) | 2021-06-18 |
Family
ID=76337957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110335717.1A Pending CN112982497A (en) | 2021-03-29 | 2021-03-29 | High-performance connecting structure for joint parts of new concrete and old concrete and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112982497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182901A (en) * | 2021-12-01 | 2022-03-15 | 深圳市科顺防水工程有限公司 | Waterproof repairing construction method for expansion joint and repairing structure thereof |
-
2021
- 2021-03-29 CN CN202110335717.1A patent/CN112982497A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182901A (en) * | 2021-12-01 | 2022-03-15 | 深圳市科顺防水工程有限公司 | Waterproof repairing construction method for expansion joint and repairing structure thereof |
| CN114182901B (en) * | 2021-12-01 | 2023-08-04 | 深圳市科顺防水工程有限公司 | Expansion joint waterproof repair construction method and repair structure thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110607809B (en) | Waterproof construction method for basement of building engineering | |
| CN108825269B (en) | Mechanical method connecting channel T-shaped junction self-adaptive waterproof structure | |
| CN109667606B (en) | Tunnel multiple waterproof construction method | |
| CN108411939A (en) | The spliced prefabricated pipe gallery of one kind and its construction method | |
| CN211547827U (en) | Waterproof structure at joint of concrete bottom plates of new and old buildings | |
| CN110878700A (en) | Tunnel waterproof structure and construction method thereof | |
| CN112227755A (en) | Waterproof repairing structure and method for old roof | |
| CN112982497A (en) | High-performance connecting structure for joint parts of new concrete and old concrete and construction method | |
| CN110541431A (en) | waterproof structure of pipe gallery and construction method thereof | |
| CN207846696U (en) | A kind of compound leak stopping system | |
| CN214883899U (en) | New and old concrete joint position high performance connection structure | |
| CN112663681A (en) | Lapping method for different waterproof materials of bottom plate and side wall of large foot | |
| CN112211230A (en) | Steel plate mortar brick composite structure and method for repairing leakage of concrete structure by using same | |
| CN215564685U (en) | Underground construction project connection structure | |
| CN114182901B (en) | Expansion joint waterproof repair construction method and repair structure thereof | |
| CN215253039U (en) | Pre-paving and anti-sticking construction structure for bottom plate modified asphalt base pre-paving waterproof coiled material | |
| CN113503056A (en) | Building deformation joint leakage maintenance method | |
| CN113585369A (en) | Construction method for joining new and old concrete of reconstructed basement | |
| CN211597830U (en) | Roof gap repairing structure | |
| CN110528593B (en) | Heat-insulation waterproof structure for joint of main body and auxiliary structure top plate of station and construction method | |
| CN109057389B (en) | Method for repairing reserved gap of building | |
| WO2019237908A1 (en) | Blocking and drainage combined treatment method for water leakage at construction joint of secondary lining of tunnel | |
| CN216041825U (en) | Be used for fissured waterproof construction of concrete member | |
| CN208748690U (en) | The waterproof slab structure of prefabricated piping lane | |
| CN111749280A (en) | Deformation joint waterproof structure and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |