CN112459115A - Construction method for rebuilding basement exterior wall of existing building - Google Patents
Construction method for rebuilding basement exterior wall of existing building Download PDFInfo
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- CN112459115A CN112459115A CN202011308697.0A CN202011308697A CN112459115A CN 112459115 A CN112459115 A CN 112459115A CN 202011308697 A CN202011308697 A CN 202011308697A CN 112459115 A CN112459115 A CN 112459115A
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- joint surface
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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
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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
- 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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- Environmental & Geological Engineering (AREA)
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- General Engineering & Computer Science (AREA)
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- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a construction method for rebuilding an outer wall of a basement of an existing building, which comprises the following steps: s1, removing the upper wall of the basement outer wall of the existing building to form a first joint surface; s2, stripping a steel bar protection layer on the upstream side of the outer wall of the existing building basement to form a second joint surface, wherein the first joint surface is connected with the second joint surface, and the second joint surface is positioned below the first joint surface; s3, respectively installing water-swelling water stop strips on the first joint surface and the second joint surface; and S4, starting from the first joint surface and the second joint surface, constructing a new wall. In the application, the water seepage path is prolonged, and conventional waterproof materials such as conventional impervious concrete, water-swelling water stop strips and the like are adopted, so that the water-stopping steel plate type waterproof effect of the construction joint of the new construction can be achieved; compared with the conventional post grouting plugging method, the construction method belongs to pre-control, and the structure construction method is simpler and more convenient and has lower cost.
Description
Technical Field
The invention relates to the technical field of secondary construction of existing buildings, in particular to a construction method for rebuilding an outer wall of a basement of an existing building.
Background
Basement outer wall seepage has always been the quality common fault that building engineering is difficult to overcome, and especially the seepage phenomenon is comparatively general in construction joint department. For the conventional newly-built basement engineering, a method of embedding a water-stop steel plate at a construction joint to prolong a water seepage path is usually adopted to achieve the waterproof effect. And for the transformation project, the water-stop steel plate can not be pre-embedded at the joint of the new and old structural construction joints, so that the leakage phenomenon at the basement exterior wall construction joint is more serious.
In the concrete construction and transformation process, the waterproof effect of the outer wall is achieved by generally adopting a mode of embedding the water-swelling water stop strip at the construction joint, but the water-swelling water stop strip has poor waterproof performance and insufficient aging resistance, and the long-term stable waterproof effect is difficult to form. The construction method can not thoroughly solve the problem of leakage at the construction joints of the new and old structures.
For example, Shenlei, Zhuwujun, and Ninxinson in the "anti-seepage measure for construction joint in basement reconstruction engineering" (construction, 2015(1):71-73.) the construction process of plugging construction joint and sticking waterproof coiled material outside by using water-based polyurethane waterproof grouting material is proposed. Although the construction process can effectively solve the problem of leakage of construction joints, the leakage points are mostly discovered and then are blocked, so that the hidden danger of water seepage is formed, the treatment cost is high, and the self-waterproof quality of the structure cannot be effectively guaranteed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method for rebuilding the basement outer wall of the existing building, which is used for solving the problems that the waterproof performance of the joint is poor in the secondary building in the prior art and the like.
The invention solves the technical problem and adopts the technical scheme that the construction method for rebuilding the basement outer wall of the existing building comprises the following steps:
s1, removing the upper wall of the basement outer wall of the existing building to form a first joint surface;
s2, stripping a steel bar protection layer on the upstream side of the outer wall of the existing building basement to form a second joint surface, wherein the first joint surface is connected with the second joint surface, and the second joint surface is positioned below the first joint surface;
s3, respectively installing water-swelling water stop strips on the first joint surface and the second joint surface;
and S4, starting from the first joint surface and the second joint surface, constructing a new wall.
Preferably, in step S1, the first joint face is roughened to remove loose concrete fragments.
Preferably, in step S2, the second joint face is roughened to remove loose concrete fragments.
Preferably, in step S4, the method includes the steps of:
s41, performing construction operation of binding steel bars of the newly-built wall and installing templates, constructing an advanced water stopping bag on the upstream surface, and binding the steel bars inside the advanced water stopping bag on the upstream surface, the steel bars of the newly-built wall and the steel bars of the original structural wall into a whole;
s42, pouring micro-expansion impervious concrete, and vibrating the micro-expansion impervious concrete;
and S43, performing laitance cleaning and wetting treatment on the first joint surface and the second joint surface.
Preferably, in step S41, the leading water-stopping pocket has a width greater than or equal to the width of the newly-built wall, and the leading water-stopping pocket has a height greater than or equal to twice the width of the second joint surface.
Preferably, the width of the first joint face is greater than or equal to the width of the second joint face.
Preferably, the first joint face is perpendicular to the second joint face.
Preferably, the first joint face is a horizontal face and the second joint face is a vertical face.
Compared with the prior art, the invention has at least the following beneficial effects:
1. the first joint surface and the second joint surface formed after the existing building outer wall is removed are connected, so that the joint of the newly-built wall body and the original structure wall body is two surfaces which are not parallel, the joint of the new wall body and the old wall body is not interrupted, and the place which cannot be installed can not be formed when the water stop strip is installed.
2. The first joint face and the second joint face play a waterproof role simultaneously, the water seepage path of the new wall body and the old wall body is greatly prolonged, and two water swelling water stop strips are arranged at the joint of the extension to form a double water stop barrier.
3. An advanced water stopping bag is constructed on the second joint surface, namely the upstream surface of the wall body, the advanced water stopping bag and the water stopping strips at the two joint positions form three waterproof measures, water flow is firstly stopped by the advanced water stopping bag, the water stopping strips are arranged at the joint positions for guarantee, even if any one waterproof measure fails, the new wall body and the old wall body cannot be directly caused to seep water, and therefore the waterproof performance of the joint positions of the new wall body and the old wall body is improved.
4. The advanced water stopping bag is larger than the width of the second joint surface, the first joint surface is connected with the second joint surface, so that the advanced water stopping bag can cover the first joint surface and the second joint surface simultaneously, namely, the advanced water stopping bag has a first waterproof effect, the first joint surface and the water stopping strip of the second joint surface have a second waterproof effect, the joint of a new wall body and an old wall body has a plurality of waterproof effects, and the waterproof performance of the joint is improved.
5. The first joint surface and the second joint surface are mutually perpendicular, so that a joint with an included angle of 90 degrees can be formed at the joint of the new wall body and the old wall body, the water seepage path is more tortuous, the water seepage possibility is lower, and the waterproof performance is further improved.
6. By prolonging the water seepage path and adopting conventional impervious concrete, water-swelling sealing strips and other conventional waterproof materials, the water-stopping steel plate type waterproof effect of the construction joint of the newly-built engineering can be achieved; compared with the conventional post grouting plugging method, the construction method belongs to pre-control, and the structure construction method is simpler and more convenient and has lower cost.
Drawings
FIG. 1 is a flow chart of a construction method in the embodiment;
FIG. 2 is a schematic structural view of a reconstructed outer wall according to an embodiment;
in the figure:
1. building a wall body; 2. an original structure wall body; 3. a rainwater expansion water stop strip; 4. a second seam face; 5. leading the water stopping bag; 6. a first seam face.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1-2, the invention discloses a construction method for rebuilding an external wall of a basement of an existing building, which comprises the following steps:
s1, removing the upper wall of the basement outer wall of the existing building to form a first joint surface 6;
s2, stripping the steel bar protection layer on the upstream side of the outer wall of the existing building basement to form a second joint face 4, wherein the first joint face 6 is connected with the second joint face 4, and the second joint face 4 is positioned below the first joint face 6;
s3, respectively installing water-swelling water stop strips on the first joint surface 6 and the second joint surface 4;
and S4, starting from the first joint surface 6 and the second joint surface 4, constructing a new wall body 1.
In the embodiment, the upper part of the wall body of the existing building outer wall is firstly dismantled, and the first joint surface 6 is exposed out of the rest wall body after the dismantling; then, part of the side surface (namely the upstream surface) of the wall body 2 with the original structure is peeled off, the second joint surface 4 is further exposed out of the residual wall body after peeling off, and the first joint surface 6 is connected with the second joint surface 4; further installing and placing water-swelling water stop strips at the first joint surface 6 and the second joint surface 4, and constructing an advanced water stop bag 5 at the second joint surface 4; and finally, newly building a wall body 1 at the two joint surfaces to complete the connection of the original structure wall body 2 and the newly built wall body 1.
Specifically, in the process, the first joint surface 6 and the second joint surface 4 formed after the existing building outer wall is removed are connected, so that the joint of the newly-built wall body 1 and the original structure wall body 2 is two non-parallel surfaces, the joint of the new wall body and the old wall body is not interrupted, and the place which cannot be installed cannot be formed when the water stop strip is installed. Meanwhile, the first joint face 6 and the second joint face 4 play a role in water prevention at the same time, the water seepage path of the new wall body and the old wall body is greatly prolonged, and two water-swelling water stop strips are arranged at the joints of the prolonged water seepage path to form a double water stop barrier.
More importantly, in the prior art, only the water stop strip is arranged on the joint surface, and once the water stop strip fails or is not sufficiently installed, the joint is not filled with the water stop strip, so that water seepage and other conditions can be caused; in the embodiment, the advanced water stopping bag 5 is constructed on the second joint surface 4, namely the upstream surface of the wall body, the advanced water stopping bag 5 and the water stopping strips at the two joints form three waterproof measures, water flow is firstly blocked by the advanced water stopping bag 5, the water stopping strips are arranged at the joints for guarantee, even if any one waterproof measure fails, water seepage of the new and old wall bodies cannot be directly caused, and therefore the waterproof performance of the joints of the new and old wall bodies is improved.
In step S1, the first joint surface 6 is roughened to remove loose concrete fragments.
In step S2, the second joint face 4 is roughened to remove loose concrete fragments.
Specifically, the first joint surface 6 and the second joint surface 4 are roughened, so that the joint of the joint is more compact and cannot be loosened.
In step S4, the method includes the steps of:
s41, performing steel bar binding and template installation construction operation on the newly-built wall body 1, constructing an advanced water stopping bag 5 on the upstream face, and binding the steel bars inside the advanced water stopping bag 5 on the upstream face, the steel bars of the newly-built wall body 1 and the steel bars of the original structure outer wall into a whole;
s42, pouring micro-expansion impervious concrete, and vibrating the micro-expansion impervious concrete;
s43, float cleaning and wetting the first joint surface 6 and the second joint surface 4.
In the S41, binding the internal steel bars of the advanced water stopping bag 5, the steel bars of the newly-built wall body 1 and the steel bars of the original structure wall body 2 into a whole, so that the new wall body and the original structure wall body 2 are connected more firmly and have higher strength; in the embodiment, C40P6 micro-expansive impervious concrete is poured in the constructed template, and the micro-expansive impervious concrete is vibrated, so that the air bubbles in the concrete are less, and the strength of the newly-built wall body 1 is enhanced; then, floating pulp cleaning and wetting treatment are carried out on the first joint surface 6 and the second joint surface 4, so that the joints of the new wall and the old wall are more compact;
in step S41, the leading water stop 5 has a width greater than or equal to the width of the new wall 1, and the leading water stop 5 has a height greater than or equal to twice the width of the second joint surface 4.
As shown in fig. 2, the height of the advanced water stopping bag 5 is greater than the width of the second joint surface 4, and the first joint surface 6 is connected with the second joint surface 4, so that the advanced water stopping bag 5 can cover the first joint surface 6 and the second joint surface 4 at the same time, that is, the advanced water stopping bag 5 has a first waterproof effect, and the water stopping strips of the first joint surface 6 and the second joint surface 4 have a second waterproof effect, so that the joints of the new and old walls have a plurality of waterproof effects, and the waterproof performance of the joints is improved.
The width of the advanced water stopping bag 5 is larger than or equal to that of the newly-built wall body 1 so as to ensure the waterproof effect, and the width can be calculated according to the width of the wall body.
In this embodiment, the width of the second joint surface 4 is the same as that of the outer wall, both the width of the leading water stopping bag 5 and the height of the leading water stopping bag 5 are 300mm and 600m, so that the leading water stopping bag 5 can completely cover the first joint surface 6 and the second joint surface 4 at the same time, and the waterproof performance of the joint is further improved.
The width of the first joint face 6 is greater than or equal to the width of the second joint face 4.
The first joint face 6 is perpendicular to the second joint face 4.
The first joint surface 6 and the second joint surface 4 are mutually perpendicular, so that a joint with an included angle of 90 degrees can be formed at the joint of the new wall body and the old wall body, the water seepage path is more zigzag, the water seepage possibility is lower, and the waterproof performance is further improved.
The first joint face 6 is a horizontal face and the second joint face 4 is a vertical face.
As shown in fig. 2, the second joint face 4 is located below the first joint face 6, and in the process of waterproofing, water flow can hardly reach the first joint face 6 from the second joint face 4 due to its own gravity, so that the waterproofing performance is greatly improved. Meanwhile, the second joint surface 4 is a horizontal plane, namely, the second joint surface 4 is parallel to the outer wall of the newly-built wall body 1, so that the difficulty of water flow entering the second joint surface 4 is higher, and the waterproof performance of the newly-built wall body is improved.
In general, the waterproof effect of the steel plate type water stop for the construction joint of the new construction can be achieved by prolonging the water seepage path and adopting conventional waterproof materials such as conventional impervious concrete, water-swelling water stop strips and the like; compared with the conventional post grouting plugging method, the construction method belongs to pre-control, and the structure construction method is simpler and more convenient and has lower cost.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. A construction method for rebuilding the basement exterior wall of an existing building is characterized by comprising the following steps:
s1, removing the upper wall of the basement outer wall of the existing building to form a first joint surface;
s2, stripping a steel bar protection layer on the upstream side of the outer wall of the existing building basement to form a second joint surface, wherein the first joint surface is connected with the second joint surface, and the second joint surface is positioned below the first joint surface;
s3, respectively installing water-swelling water stop strips on the first joint surface and the second joint surface;
and S4, starting from the first joint surface and the second joint surface, constructing a new wall.
2. The method as claimed in claim 1, wherein in step S1, the first joint face is chiseled to remove loose concrete fragments.
3. The method as claimed in claim 1, wherein in step S2, the second joint face is chiseled to remove loose concrete fragments.
4. The construction method for reconstructing the exterior wall of the basement of the existing building according to the claim 1, wherein in the step S4, the method comprises the following steps:
s41, performing construction operation of binding steel bars of the newly-built wall and installing templates, constructing an advanced water stopping bag on the upstream surface, and binding the steel bars inside the advanced water stopping bag on the upstream surface, the steel bars of the newly-built wall and the steel bars of the original structure outer wall into a whole;
s42, pouring micro-expansion impervious concrete, and vibrating the micro-expansion impervious concrete;
and S43, performing laitance cleaning and wetting treatment on the first joint surface and the second joint surface.
5. The construction method for reconstructing the exterior wall of the basement of the existing building as claimed in claim 4, wherein in step S41, the width of the leading water-stopping bag is greater than or equal to the width of the newly-built wall, and the height of the leading water-stopping bag is greater than or equal to twice the width of the second joint surface.
6. The method as claimed in claim 1, wherein the first joint face has a width greater than or equal to the width of the second joint face.
7. The method as claimed in any one of claims 1 to 6, wherein the first joint face is perpendicular to the second joint face.
8. The method as claimed in claim 7, wherein the first joint surface is a horizontal surface and the second joint surface is a vertical surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011308697.0A CN112459115A (en) | 2020-11-20 | 2020-11-20 | Construction method for rebuilding basement exterior wall of existing building |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011308697.0A CN112459115A (en) | 2020-11-20 | 2020-11-20 | Construction method for rebuilding basement exterior wall of existing building |
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| CN112459115A true CN112459115A (en) | 2021-03-09 |
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| CN202011308697.0A Pending CN112459115A (en) | 2020-11-20 | 2020-11-20 | Construction method for rebuilding basement exterior wall of existing building |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960767A (en) * | 2022-05-16 | 2022-08-30 | 中国一冶集团有限公司 | Advanced water-stopping reinforced structure for connecting new and old channels and construction method thereof |
| CN115787756A (en) * | 2022-12-23 | 2023-03-14 | 北京华清安地建筑设计有限公司 | Basement repairing construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT356169B (en) * | 1976-12-16 | 1980-04-10 | Sarna Kunststoff Ag | BUTTING JOINT FOR CONTINUOUS WALL COVERING PANELS OR WALL COVERING FILMS |
| CN205012371U (en) * | 2015-06-05 | 2016-02-03 | 中天建设集团有限公司 | Twice construction of wall body prevents permeable to water construction structures |
| CN206457846U (en) * | 2016-12-30 | 2017-09-01 | 宁夏东方盛达管业有限公司 | Assembled concrete prefabricated square culvert above and below a kind of high efficiency |
| CN211948561U (en) * | 2020-01-02 | 2020-11-17 | 深圳市综合交通设计研究院有限公司 | Open-cut river-crossing tunnel constructed by cofferdam method in sections |
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2020
- 2020-11-20 CN CN202011308697.0A patent/CN112459115A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT356169B (en) * | 1976-12-16 | 1980-04-10 | Sarna Kunststoff Ag | BUTTING JOINT FOR CONTINUOUS WALL COVERING PANELS OR WALL COVERING FILMS |
| CN205012371U (en) * | 2015-06-05 | 2016-02-03 | 中天建设集团有限公司 | Twice construction of wall body prevents permeable to water construction structures |
| CN206457846U (en) * | 2016-12-30 | 2017-09-01 | 宁夏东方盛达管业有限公司 | Assembled concrete prefabricated square culvert above and below a kind of high efficiency |
| CN211948561U (en) * | 2020-01-02 | 2020-11-17 | 深圳市综合交通设计研究院有限公司 | Open-cut river-crossing tunnel constructed by cofferdam method in sections |
Non-Patent Citations (1)
| Title |
|---|
| 沈雷鸣等: "地下室改建工程中的施工缝防渗措施", 《建筑施工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960767A (en) * | 2022-05-16 | 2022-08-30 | 中国一冶集团有限公司 | Advanced water-stopping reinforced structure for connecting new and old channels and construction method thereof |
| CN115787756A (en) * | 2022-12-23 | 2023-03-14 | 北京华清安地建筑设计有限公司 | Basement repairing construction method |
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