CN112459116A - Construction method for rebuilding basement bottom plate of existing building - Google Patents
Construction method for rebuilding basement bottom plate of existing building Download PDFInfo
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- CN112459116A CN112459116A CN202011308751.1A CN202011308751A CN112459116A CN 112459116 A CN112459116 A CN 112459116A CN 202011308751 A CN202011308751 A CN 202011308751A CN 112459116 A CN112459116 A CN 112459116A
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- bottom plate
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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
- 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
Abstract
The invention discloses a construction method for rebuilding a basement bottom plate of an existing building, which comprises the following steps: s1, removing part of the original bottom plate, and forming a first joint surface, a second joint surface and a third joint surface on the rest bottom plate; s2, excavating concrete and earthwork below the removed bottom plate, excavating part of the concrete and earthwork below the rest bottom plate, and forming a reserved space below the rest bottom plate; s3, filling waterproof materials; and S4, constructing the newly-built bottom plate to be connected with the rest bottom plate. In this application, through the turn extension of surplus bottom plate and the seam of newly-built bottom plate and utilize the water swelling sealing rod sealing performance of multichannel water, the waterproof effect of pre-buried stagnant water steel sheet formula when having guaranteed reconstruction bottom plate seam face from waterproof performance to reach conventional first construction to be aided with advance water stopping package and prepare hydrophobic pipe, further strengthen the infiltration hidden danger that sealing effect and prevention probably produced, the waterproof effect who makes reconstruction bottom plate seam face just can obtain guaranteeing through simple construction structure, construction cost has been practiced thrift.
Description
Technical Field
The invention relates to the technical field of secondary construction of existing buildings, in particular to a construction method for rebuilding a basement bottom plate of an existing building.
Background
Basement foundation slab often is the hydrological condition that an engineering faces is the most complicated, bears the position of water pressure the biggest, also is the most serious position of seepage phenomenon, especially post-cast strip construction seam seepage problem is difficult to be controlled radically. For the conventional newly-built basement engineering, an advanced water stop structure is usually arranged at the lower part of a post-cast strip, and a water stop steel plate is pre-embedded at a construction joint to prolong a water seepage path so as to achieve the waterproof effect of a bottom plate construction joint. And to the transformation engineering, new and old structure construction joint handing-over department can't pre-buried stagnant water steel sheet, and advance stagnant water structure also receives former bottom plate restriction and unable construction, leads to transforming engineering bottom plate construction joint department waterproof barrier to do not have at all, and the seepage hidden danger is very big.
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, the construction technology of pre-embedded grouting pipes for construction joints of basement floors (construction technology, 2018,002(006):42-43) proposes that pre-embedded grouting pipes are used for diversion to a water collecting well for open drainage treatment in the text of department Lin, Shaozhu and Huangjiao. Although the construction process can effectively solve the problem of leakage of the construction joints of the bottom plate, the drainage guide pipes are embedded in the structure, later-stage dredging and maintenance are not convenient, the drainage guide pipes arranged at intervals have limited dredging effect on the whole-line leakage of the construction joints of the reconstruction engineering bottom plate, and the self-waterproof quality level of the construction joints of the reconstruction engineering bottom plate is not effectively improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method for rebuilding the basement bottom plate of the existing building, which is used for solving the problems of poor waterproof performance of the joint during 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 bottom plate of the existing building comprises the following steps:
s1, removing part of the original bottom plate, and forming a first joint surface, a second joint surface and a third joint surface on the rest bottom plate; the first joint surface, the second joint surface and the third joint surface are sequentially connected, and the second joint surface is respectively vertical to the first joint surface and the third joint surface;
s2, excavating concrete and earthwork below the removed bottom plate, excavating part of the concrete and earthwork below the rest bottom plate, and forming a reserved space below the rest bottom plate; wherein, the reserved space is connected with the third joint surface;
s3, filling waterproof materials; wherein, the reserved space is filled with a leading water stopping bag, and water-swelling water stopping strips are respectively arranged on the first joint surface, the second joint surface and the third joint surface;
and S4, constructing the newly-built bottom plate to be connected with the rest bottom plate.
Preferably, in step S1, a roughening process is performed on the first joint surface, the second joint surface, and the third joint surface; wherein the first joint surface, the second joint surface and the third joint surface are cut into rabbet shapes.
Preferably, the depth and width of the tongue and groove are 1/2 of the remaining base thickness.
Preferably, in step S2, the height of the reserved space is 1/3 to 1/2 of the thickness of the bottom plate.
Preferably, the height of the headspace is 3/7 the thickness of the floor.
Preferably, in step S3, a plurality of hydrophobic conduits are fixedly installed on the first joint surface.
Preferably, the plurality of drainage conduits are connected by a plurality of tee joints which funnel water flow into the sump well.
Preferably, the interval between any two adjacent hydrophobic conduits is 3-5 m.
Preferably, in step S4, the method further comprises the steps of:
s41, pouring a newly-built bottom plate cushion layer and a masonry brick moulding bed;
s42, binding the steel bars of the newly-built bottom plate structure, and binding the internal steel bars of the advanced water stopping drum, the steel bars of the newly-built bottom plate and the steel bars of the residual bottom plate into a whole;
and S43, pouring micro-expansion impervious concrete and simultaneously performing vibration treatment.
Preferably, the second joint face is parallel to the horizontal plane.
Compared with the prior art, the invention has at least the following beneficial effects:
1. the first joint face, the second joint face and the third joint face are sequentially connected, and meanwhile, the second joint face is perpendicular to the first joint face and the third joint face respectively, so that the joint area between the new and old bottom plates is greatly increased, the seepage path of the reconstruction bottom plate is further increased (the path that water sequentially passes through the third joint face, the second joint face and the third joint face from the upstream face), and the waterproof performance of the reconstruction bottom plate is greatly improved.
2. The three joint surfaces are dug into rabbet shapes, so that the joint area of the new and old bottom plates can be further increased, the connection of the new and old bottom plates can be more compact, and the connection strength of the reconstructed bottom plates can be improved; the joint is arranged in a tongue-and-groove shape, so that a water seepage path can be increased, the difficulty of water penetrating the joint is increased, and the waterproof performance of the reconstructed base plate is greatly improved.
3. The reserved space is positioned on the upstream face, and the advanced water stopping bag is filled in the reserved space to provide a first waterproof measure for the reconstruction bottom plate, so that most of water can be isolated from entering the third joint face.
4. Since most of the water is isolated by the advanced water stopping bag, the water which can reach the third joint surface through the advanced water stopping bag is a very small part, so the water-swelling water stopping strip with the three joint surfaces can completely prevent the water penetrating from the advanced water stopping bag from penetrating to the upper surface of the bottom plate, which is a second waterproof measure for rebuilding the bottom plate.
5. And arranging a hydrophobic conduit at the first joint surface, namely the joint surface closest to the upper surface of the bottom plate, as the last waterproof measure for rebuilding the bottom plate. When the advanced water stopping bag or/and the water-swelling water stop strip fail, the hydrophobic conduit can guide water into a nearby water collecting well instead of directly flowing to the upper surface of the bottom plate, so that the waterproof performance of the reconstructed bottom plate is guaranteed to be completely lost.
6. The second joint face is parallel to the horizontal plane and is perpendicular to the first joint face and the third joint face simultaneously, so that a right angle is formed in a water seepage path, the first joint face and the third joint face are perpendicular to the horizontal plane, water flow reaches the second joint face from the third joint face, the first joint face from the second joint face and reaches the upper surface of the bottom plate from the first joint face under the action of gravity of the water flow, and the difficulty of the water flow reaching the upper surface of the bottom plate from the third joint face is greatly increased, so that the waterproof performance of the water flow is improved.
Drawings
FIG. 1 is a flow chart of a construction method in the embodiment;
FIG. 2 is a schematic structural diagram of a reconstructed base plate in the embodiment;
in the figure:
1. the remaining bottom plate; 2. newly building a bottom plate; 3. a first seam face; 4. a second seam face; 5. leading the water stopping bag; 6. a third joint face; 7. a water-swelling sealing strip when meeting water; 8. a hydrophobic conduit.
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 a basement floor of an existing building, which comprises the following steps:
s1, removing part of the original bottom plate, and forming a first joint surface 3, a second joint surface 4 and a third joint surface 6 on the rest bottom plate 1; the first joint surface 3, the second joint surface 4 and the third joint surface 6 are sequentially connected, and the second joint surface 4 is perpendicular to the first joint surface 3 and the third joint surface 6 respectively;
s2, excavating concrete and earthwork below the removed bottom plate, excavating part of the concrete and earthwork below the rest bottom plate 1, and forming a reserved space below the rest bottom plate 1; wherein the reserved space is connected with the third joint surface 6;
s3, filling waterproof materials; wherein, the reserved space is filled with an advanced water stopping bag 5, and water-swelling water stopping strips 7 are respectively arranged on the first joint surface 3, the second joint surface 4 and the third joint surface 6;
s4, constructing the new bottom plate 2 to be connected with the rest bottom plate 1.
In this embodiment, a part of the existing floor building is firstly dismantled, the remaining floor 1 exposes the first joint surface 3, the second joint surface 4 and the third joint surface 6, the first joint surface 3, the second joint surface 4 and the third joint surface 6 are sequentially connected, and the second joint surface 4 is respectively perpendicular to the first joint surface 3 and the third joint surface 6, so that the joint area between the old and new floors is greatly increased, the water seepage path of the reconstruction floor is further increased (the path through which water sequentially passes through the third joint surface 6, the second joint surface 4 and the third joint surface 6 from the upstream), and the waterproof performance of the reconstruction floor is greatly improved.
Further, digging out part of concrete and earthwork below the residual bottom plate 1 to form a reserved space, as shown in fig. 2, wherein the reserved space is positioned on the upstream surface, and an advanced water stopping bag 5 is filled in the reserved space to provide a first waterproof measure for the reconstructed bottom plate, so that most of water can be isolated from entering a third joint surface 6; the first joint surface 3, the second joint surface 4 and the third joint surface 6 are respectively provided with a water-swelling water stop bar 7; since most of the water is isolated by the leading water stopper 5, the water that can reach the third joint face 6 through the leading water stopper 5 is a very small part, and therefore, the water-swellable seal 7 of the three joint faces can completely prevent the water penetrating from the leading water stopper 5 from penetrating to the upper surface of the bottom plate, which is a second measure of waterproofing for rebuilding the bottom plate.
And finally, after the filling of the waterproof material is finished, constructing the newly-built bottom plate 2 to be connected with the rest bottom plate 1, and finishing the construction.
In step S1, a roughening process is performed on the first joint surface 3, the second joint surface 4, and the third joint surface 6; wherein the first joint face 3, the second joint face 4 and the third joint face 6 are cut into rabbet shapes.
The three joint surfaces are dug into rabbet shapes, so that the joint area of the new and old bottom plates can be further increased, the connection of the new and old bottom plates can be more compact, and the connection strength of the reconstructed bottom plates can be improved; it can be understood that the seam is arranged in a tongue-and-groove shape, the water seepage path can be increased, the difficulty of water penetrating the seam is increased, and the waterproof performance of the reconstructed bottom plate is greatly improved.
The depth and width of the tongue-and-groove are 1/2 of the remaining thickness of the bottom plate 1.
The depth and the width of the groove are set to be half of the thickness of the bottom plate, and when the thickness of the bottom plate is changed, the depth and the width of the groove are changed; therefore, the connection strength and the waterproof performance of the reconstructed bottom plate can be ensured by changing the depth and the thickness of the tongue-and-groove regardless of the change of the thickness of the bottom plate.
In this embodiment, the inner wall of the reserved space is also cut into a rabbet shape, so that the connection strength and the sealing property between the reserved space and the advanced water stopping bag 5 can be improved, and water flow is prevented from bypassing the advanced water stopping bag 5 and flowing to the third joint surface 6.
In step S2, the height of the reserved space is 1/3 to 1/2 of the thickness of the bottom plate.
Specifically, the reserved space is filled with the advanced water stopping bag 5, so that the height of the reserved space is the thickness of the advanced water stopping bag 5, and the thickness of the advanced water stopping bag 5 is 1/3 to 1/2 of the thickness of the bottom plate, so that on the premise of ensuring the waterproof performance of the advanced water stopping bag 5, materials are not wasted, and the construction cost is further reduced.
The height of the headspace is 3/7 the thickness of the bottom plate.
In this embodiment, the bottom plate has a thickness of 700mm, and the height of the reserved space and the thickness of the leading water stopper 5 are both 300 mm.
In step S3, a plurality of drain pipes 8 are fixed to the first joint surface 3.
The interval between any two adjacent hydrophobic conduits 8 is 3-5 m.
The plurality of drainage conduits 8 are connected through a plurality of tee joints, and the tee joints enable water flow to converge into the water collecting well.
A drainage conduit 8 is arranged on the first joint surface 3, namely the joint surface closest to the upper surface of the soleplate, and is used as the last waterproof measure for reconstructing the soleplate. When the leading water stopper 5 or/and the water-swelling water stop 7 fail, the hydrophobic conduit 8 can guide water into a nearby water collecting well without directly flowing to the upper surface of the bottom plate, thereby ensuring the waterproof performance of the reconstructed bottom plate to be perfect.
In step S4, the method further includes the steps of:
s41, pouring a cushion layer and a masonry brick moulding bed of the newly-built bottom plate 2;
s42, binding the structural steel bars of the newly-built bottom plate 2, and binding the internal steel bars of the advanced water stopping bag 5, the steel bars of the newly-built bottom plate 2 and the steel bars of the residual bottom plate 1 into a whole;
and S43, pouring micro-expansion impervious concrete and simultaneously performing vibration treatment.
Binding the internal steel bars ahead of the water stopping bag 5, the steel bars of the newly-built bottom plate 2 and the steel bars of the residual bottom plate 1 into a whole, so that the newly-built bottom plate 2 and the residual bottom plate 1 are connected more firmly and have higher strength; the micro-expansion impervious concrete is vibrated, so that the air bubbles in the concrete are less, and the strength of the reconstructed bottom plate is enhanced.
The second joint face 4 is parallel to the horizontal plane.
As shown in fig. 2, the second joint face 4 is parallel to the horizontal plane and is perpendicular to the first joint face 3 and the third joint face 6, so that a water seepage path has a right angle, and the first joint face 3 and the third joint face 6 are perpendicular to the horizontal plane, so that under the action of the gravity of water flow, the difficulty of the water flow reaching the second joint face 4 from the third joint face 6, reaching the first joint face 3 from the second joint face 4 and reaching the upper surface of the base plate from the first joint face 3 is greatly increased, and the waterproof performance of the base plate is improved.
In general, in the embodiment, the water stopping performance of the joint surface of the reconstructed bottom plate reaches the waterproof effect of a pre-buried water stopping steel plate type in the conventional first construction by prolonging the turning of the joint of the residual bottom plate 1 and the newly-built bottom plate 2 and utilizing the water stopping performance of the plurality of water-swelling water stopping strips 7, the advanced water stopping bag 5 and the prepared hydrophobic conduit 8 are used for assisting, the water stopping effect is further enhanced, the potential water seepage hazard which may be generated is prevented, the waterproof effect of the joint surface of the reconstructed bottom plate can be ensured through a simple construction structure, and the construction cost is saved.
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 (10)
1. A construction method for rebuilding a basement bottom plate of an existing building is characterized by comprising the following steps:
s1, removing part of the original bottom plate, and forming a first joint surface, a second joint surface and a third joint surface on the rest bottom plate; the first joint surface, the second joint surface and the third joint surface are sequentially connected, and the second joint surface is respectively vertical to the first joint surface and the third joint surface;
s2, excavating concrete and earthwork below the removed bottom plate, excavating part of the concrete and earthwork below the rest bottom plate, and forming a reserved space below the rest bottom plate; wherein, the reserved space is connected with the third joint surface;
s3, filling waterproof materials; wherein, the reserved space is filled with a leading water stopping bag, and water-swelling water stopping strips are respectively arranged on the first joint surface, the second joint surface and the third joint surface;
and S4, constructing the newly-built bottom plate to be connected with the rest bottom plate.
2. The method of claim 1, wherein in step S1, the first joint surface, the second joint surface and the third joint surface are chiseled; wherein the first joint surface, the second joint surface and the third joint surface are cut into rabbet shapes.
3. The method as claimed in claim 2, wherein the depth and width of the tongue and groove are 1/2 of the remaining thickness of the base plate.
4. The method of claim 1, wherein in step S2, the height of the reserved space is 1/3 to 1/2 of the thickness of the bottom plate.
5. The method as claimed in claim 4, wherein the height of the reserved space is 3/7 mm.
6. The method of claim 1, wherein a plurality of drainage pipes are fixed to the first joint surface in step S3.
7. The method of claim 6, wherein the plurality of drainage pipes are connected by a plurality of tee joints, and the tee joints are used for converging water flow into the water collecting well.
8. The construction method for rebuilding the basement floor of an existing building according to claim 7, wherein the interval between any two adjacent hydrophobic pipes is 3-5 m.
9. The method of claim 1, wherein in step S4, the method further comprises the steps of:
s41, pouring a newly-built bottom plate cushion layer and a masonry brick moulding bed;
s42, binding the steel bars of the newly-built bottom plate structure, and binding the internal steel bars of the advanced water stopping drum, the steel bars of the newly-built bottom plate and the steel bars of the residual bottom plate into a whole;
and S43, pouring micro-expansion impervious concrete and simultaneously performing vibration treatment.
10. A method as claimed in any one of claims 1 to 9, wherein the second joint plane is parallel to the horizontal plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011308751.1A CN112459116A (en) | 2020-11-20 | 2020-11-20 | Construction method for rebuilding basement bottom plate of existing building |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011308751.1A CN112459116A (en) | 2020-11-20 | 2020-11-20 | Construction method for rebuilding basement bottom plate of existing building |
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| CN202011308751.1A Pending CN112459116A (en) | 2020-11-20 | 2020-11-20 | Construction method for rebuilding basement bottom plate of existing building |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718122A (en) * | 2022-03-16 | 2022-07-08 | 中国五冶集团有限公司 | Method for anti-seepage treatment of new and old structure underground corridor foundation connection construction joint |
| 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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| CN108560585A (en) * | 2018-05-30 | 2018-09-21 | 上海城建建设实业集团新型建筑材料嘉兴有限公司 | The full assembling structure of outer wall of basement and its construction method |
| CN110792101A (en) * | 2019-11-04 | 2020-02-14 | 广东省重工建筑设计院有限公司 | Underground building and implementation method thereof |
| CN111271097A (en) * | 2020-03-30 | 2020-06-12 | 中铁二院工程集团有限责任公司 | Construction joint waterproof structure suitable for reconstructing tunnel lining and construction method thereof |
| 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 CN202011308751.1A patent/CN112459116A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108560585A (en) * | 2018-05-30 | 2018-09-21 | 上海城建建设实业集团新型建筑材料嘉兴有限公司 | The full assembling structure of outer wall of basement and its construction method |
| CN110792101A (en) * | 2019-11-04 | 2020-02-14 | 广东省重工建筑设计院有限公司 | Underground building and implementation method thereof |
| 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 |
| CN111271097A (en) * | 2020-03-30 | 2020-06-12 | 中铁二院工程集团有限责任公司 | Construction joint waterproof structure suitable for reconstructing tunnel lining and construction method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718122A (en) * | 2022-03-16 | 2022-07-08 | 中国五冶集团有限公司 | Method for anti-seepage treatment of new and old structure underground corridor foundation connection construction joint |
| 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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Application publication date: 20210309 |