CN108824446A - A method of improving foundation pit SMW fender post waterproof performance - Google Patents
A method of improving foundation pit SMW fender post waterproof performance Download PDFInfo
- Publication number
- CN108824446A CN108824446A CN201810777840.7A CN201810777840A CN108824446A CN 108824446 A CN108824446 A CN 108824446A CN 201810777840 A CN201810777840 A CN 201810777840A CN 108824446 A CN108824446 A CN 108824446A
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- smw
- fashioned iron
- waterproof performance
- fender post
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Abstract
The present invention provides a kind of method for improving foundation pit SMW fender post waterproof performance, wherein more Grouting Pipes is arranged at the inside groove location close to every fashioned iron of foundation pit SMW supporting construction, in fashioned iron insertion foundation pit；Multiple extravasating holes are set in the Grouting Pipe；Sand finish is applied to foundation pit SMW pile body side wall, re-lays waterproof roll layer, finally in waterproof roll layer and foundation pit between structure side wall joints cement soil；Fashioned iron is extracted, slip casing by pressure is carried out to Grouting Pipe after fashioned iron extraction, slurries are under the action of interior pressure, the rubber ring distending that will be wrapped in outside Grouting Pipe, until pressurized slurries stop pressurization after filling up the gap left in foundation pit SMW pile body after fashioned iron is extracted.The present invention can be improved the waterproof effect of structure side wall in foundation pit, solve the technical problem for the cement soil pile water-stagnating effect difference left after the fashioned iron in foundation pit SMW supporting construction is extracted.
Description
Technical field
The present invention relates to technical field of building construction, more particularly, to a kind of improvement foundation pit SMW fender post waterproof performance
Method.
Background technique
SMW (Soil Mixing Wall, fashioned iron cement mixing method) supporting construction 2 is to utilize special multi-shaft stirring just
The ground drilling cutting soil body, forms SMW foundation pit, while cement grout is injected the soil body in drill bit end, after being thoroughly mixed,
Structure side wall 1 takes overlapping lapping construction between each construction cell along foundation pit, again will before soil cement mixture is not tied firmly
Fashioned iron 21 is inserted into pile body, and being formed has some strength and rigidity supporting construction, i.e. SMW supporting construction.The SMW supporting construction is made
For the earth-retaining and water sealing structure of underground excavation foundation pit, there is sealing and supporting double action.
Due to the simple structure of SMW supporting construction 2, speed of application is fast, can substantially shorten the construction period, and main inside foundation pit
Fashioned iron can be extracted and be recycled after the completion of body structure construction, be therefore widely used in underground construction engineering.
However, cement earth pile after support construction after the completion extracts fashioned iron inside foundation pit, as water-stop curtain
Gap can be generated in vivo, these gaps will become water space and penetrating passage, and cement soil pile is easily caused locally to occur
Infiltration, influences the waterproof effect of structure side wall 1 in foundation pit.
In addition, leading to the waterproof roll being laid on the inside of structure side wall 1 in fashioned iron 21 and foundation pit since fashioned iron 21 is inserted into error
Between cement protective soil layer became uneven, easily damage waterproof roll in 21 withdrawal process of fashioned iron, influence waterproof effect and
Structure durability.
Therefore, there is an urgent need to the relevant technologies at present to solve following two technical problems：
One：The cement soil pile water-stagnating effect that fashioned iron in foundation pit SMW supporting construction is left after extracting is poor；
Secondly：Extract the destruction that fashioned iron is easy to cause the waterproof roll being laid on the inside of structure side wall 1 in foundation pit in the process.
Summary of the invention
The purpose of the present invention is presently, there are aiming at the problem that, providing a kind of improves foundation pit SMW fender post waterproof performance
Method can effectively improve the waterproof effect of structure side wall in foundation pit, right after fashioned iron is extracted in foundation pit SMW so as to solve
The influence of cement soil pile waterproof performance in foundation pit.
The purpose of the present invention is achieved through the following technical solutions：
The object of the present invention is to provide a kind of methods for improving foundation pit SMW fender post waterproof performance comprising：
Step S10, after completing SMW excavation of foundation pit, in the inside slot position of the every fashioned iron close to foundation pit SMW supporting construction
Place's setting Grouting Pipe is set, in fashioned iron insertion foundation pit soil cement；Multiple extravasating holes are set in the Grouting Pipe；
Step S20 is carrying out foundation pit SMW supporting construction first to apply sand finish to SMW pile body in work progress, then
The laying water-proof coiled material layer on the basis of sand finish layer of formation is finally pouring between structure side wall in waterproof roll layer and foundation pit
Build soil cement；
Step S30 extracts fashioned iron after completing foundation pit SMW support construction, carries out after fashioned iron extraction to Grouting Pipe
Slip casing by pressure, slurries are under the action of interior pressure, the rubber ring distending that will be wrapped in outside Grouting Pipe, until pressurized slurries are filled out
Stop pressurization behind the gap that full fashioned iron is left in SMW pile body after extracting.
It is highly preferred that before the process of laying water-proof coiled material layer, the step S20 further includes：
Low ratio foamed polyethylene board separation layer is laid on the basis of the sand finish layer of formation.
It is highly preferred that the outside of the Grouting Pipe is enclosed with rubber ring.
It is highly preferred that inner side slot of the burial place of the Grouting Pipe close to every fashioned iron of foundation pit SMW supporting construction.
It is highly preferred that the extravasating hole (231) is in quincuncial arrangement.
The present invention has the following technical effect that it can be seen from the technical solution of aforementioned present invention：
The present invention is improved by the technology of " embedded Grouting Pipe leaves the gap of cement soil pile after extracting come filling section steel "
The waterproof effect of structure side wall in foundation pit, to solve the cement left after the fashioned iron in foundation pit SMW supporting construction is extracted
The technical problem of native pile body water-stagnating effect difference.
The present invention between SMW supporting construction pile body and side wall waterproof roll by " adding one layer of low ratio foamed polystyrene
The technology of plate separation layer " avoids and the waterproof roll that structure side wall 1 is laid in foundation pit is easy to cause to destroy during extracting fashioned iron
The drawbacks of, to further can be improved the waterproof effect of structure side wall in foundation pit.
Detailed description of the invention
Fig. 1 is the application schematic diagram of SMW supporting construction in the prior art；
Fig. 2 is implementation flow chart of the invention；
Fig. 3 is the position schematic diagram of the Grouting Pipe in the present invention；
Fig. 4 is the structural schematic diagram of the Grouting Pipe in the present invention；
Fig. 5 is the A-A view of Fig. 2；
Fig. 6 is the B partial enlargement diagram in Fig. 5；
Fig. 7 be the present invention in into Grouting Pipe during slip casting slurries filling mechanism schematic diagram.
In attached drawing：
It is structure side wall 1 in foundation pit, foundation pit SMW supporting construction 2, sand finish layer 3, low ratio foamed polyethylene board separation layer 4, anti-
Water coiled material layer 5；Fashioned iron 21, SMW pile body 22, Grouting Pipe 23, rubber ring 24；Extravasating hole 231.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution of the application, below with reference to attached drawing 2 to attached
Shown in Fig. 5, the present invention is described in further details.
Embodiment one：
The present invention provides a kind of method for improving foundation pit SMW fender post waterproof performance, and implementing procedure is as shown in Fig. 2, packet
Include following steps：
Step S10, after completing SMW excavation of foundation pit, in the inside slot position of the every fashioned iron close to foundation pit SMW supporting construction
More Grouting Pipes 23 of place's setting are set, are inserted into foundation pit soil cement simultaneously with fashioned iron 21；It is arranged on the tube wall of the Grouting Pipe 23 multiple
Extravasating hole 231, the outside of Grouting Pipe 23 are enclosed with rubber ring 24.
The position of Grouting Pipe is same with fashioned iron as shown in figure 3, two Grouting Pipes 23 are arranged in the inner side slot of fashioned iron 21
When insertion pit slot soil cement in, the upper end of the Grouting Pipe 23 and foundation pit interior main body structure roof maintain an equal level, and lower end is deep into Foundation Pit
The following set depth in bottom, the set depth can be 1m.
The structure of Grouting Pipe is as shown in figure 4, the Grouting Pipe 23 can use steel pipe, such as the hot finished steel pipe of φ 42mm, slip casting
It is arranged on pipe by multiple extravasating holes 231, such as the extravasating hole 231 of φ 8mm.The extravasating hole 231 can be in quincuncial arrangement, in this way may be used
So that the cement slurry being injected into Grouting Pipe 23 more uniformly go out from each extravasating hole 231 by overflow, the extravasating hole 231
It can also arrange, such as be staggered in arrangement, the pitch-row between the two neighboring extravasating hole 231 of 23 axis direction of Grouting Pipe in other shapes
No less than set spacing threshold, such as 1m.Cement grout enters Grouting Pipe 23 in pit slot to prevent in insertion process, the Grouting Pipe
23 outside is enclosed with rubber ring 24.
Step S20 constructs to foundation pit SMW supporting construction 2, and first SMW pile body each to foundation pit in the construction process
22 side walls apply sand finish, and low ratio foamed polyethylene board separation layer 4 is then laid on the basis of the sand finish layer 3 of formation, then
Laying water-proof coiled material layer 5, finally in waterproof roll layer 5 and foundation pit between structure side wall 1 joints cement soil.
To prevent fashioned iron from extracting the destruction to waterproof roll, before, first using the mortar of 5cm to foundation pit SMW supporting knot
Plastering processing is carried out outside the pile body side wall of structure 2, forms the sand finish layer 3 of surfacing；Then it is poly- to re-lay one layer of low ratio foamed
The thickness of vinyl plate separation layer 4, the low ratio foamed polyethylene board separation layer 4 is not less than 1cm；Then waterproof is laid on separation layer again
Coiled material forms waterproof roll layer 5, finally pours structure side wall 1 in foundation pit, form foundation pit SMW as shown in Figure 5 and Figure 6 and go along with sb. to guard him
Structure.
Step S30 extracts fashioned iron 21 after the completion of the construction of foundation pit SMW supporting construction 2, to slip casting after the extraction of fashioned iron 21
Pipe 23 carries out slip casing by pressure, and slurries will be wrapped in 24 distending of the rubber ring outside Grouting Pipe 23 under the action of interior pressure, until quilt
The slurries of pressurization stop pressurization after filling up the gap left in foundation pit SMW pile body 22 after fashioned iron 21 is extracted.
After the completion of the main structure construction of foundation pit SMW supporting construction 2, fashioned iron 21 is extracted, to note after the extraction of fashioned iron 21
It starches pipe 23 and carries out slip casing by pressure, slurries are cement slurry, as shown in fig. 7, slurries under the action of interior pressure, will be wrapped in Grouting Pipe
24 distending of rubber ring outside 23, and overflow.(such as reach 0.5MPa) to a certain extent when pressure is gradually increased, pressurized slurries
Filling, infiltration, densification, splitting flowing will be generated along cement soil pile gap, thus after reaching the extraction of filling section steel 21
Cement soil pile anti-permeability performance purpose is left in gap, raising.
Embodiment two：
Embodiment two has been lacked compared with embodiment one and has added one layer between SMW supporting construction pile body and waterproof roll layer
The step of low ratio foamed polyethylene benzene plate separation layer.
Embodiment three：
Embodiment three has lacked the process that rubber ring 24 is added outside Grouting Pipe 23 compared with embodiment one.In this case, working as
After the completion of the main structure construction of foundation pit SMW supporting construction 2, fashioned iron 21 is extracted, Grouting Pipe 23 is carried out after the extraction of fashioned iron 21
Slip casing by pressure, slurries are cement slurry, and slurries overflow inside Grouting Pipe 23 along extravasating hole 231, edge under the action of interior pressure
Landing surface structure generates filling, infiltration, densification, splitting flowing, to reach the gap after filling section steel 21 is extracted, raising is left
Cement soil pile anti-permeability performance purpose.
It is to be illustrated so that each fashioned iron of correspondence buries 2 Grouting Pipes 23 as an example in above-described embodiment, but it is of the invention
Be not limited thereto, each fashioned iron embedded one or more root Grouting Pipes 23 can also be corresponded to reach realize it is of the invention
Purpose.
The present invention passes through " after embedded Grouting Pipe is extracted come filling section steel it can be seen from the technical solution of aforementioned present invention
Leave the gap of cement soil pile " and " one layer of low ratio foamed is added between the SMW pile body and waterproof roll layer of SMW supporting construction
The technology of polyethylene benzene plate separation layer " improves foundation pit main structure side wall waterproof effect.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment does not limit the present invention.This hair is not being departed from
In bright spirit and scope, any equivalent change or retouch done also belongs to the protection scope of the present invention.Therefore the present invention
Protection scope should be based on the content defined in the claims of this application.
Claims (5)
1. a kind of method for improving foundation pit SMW fender post waterproof performance, which is characterized in that the improvement foundation pit SMW fender post
The method of waterproof performance includes：
Note is arranged after completing SMW excavation of foundation pit in step S10 at the position close to every fashioned iron of foundation pit SMW supporting construction
Slurry pipe (23), in fashioned iron (21) insertion foundation pit soil cement；Multiple extravasating holes (231) are set in the Grouting Pipe (23)；
Step S20 is carrying out foundation pit SMW supporting construction (2) first to apply sand finish to SMW pile body (22) in work progress,
The laying water-proof coiled material layer (5) on the basis of sand finish layer (3) of formation again is finally tied in waterproof roll layer (5) and foundation pit
Joints cement soil between structure side wall (1)；
Step S30 is extracted fashioned iron (21) after completing foundation pit SMW supporting construction (2) construction, to note after fashioned iron (21) are extracted
Slurry pipe (23) carries out slip casing by pressure, and it is swollen will to be wrapped in the rubber ring (24) of Grouting Pipe (23) outside under the action of interior pressure for slurries
It opens, until pressurized slurries stop pressurization after filling up the gap left in SMW pile body (22) after fashioned iron (21) are extracted.
2. the method according to claim 1 for improving foundation pit SMW fender post waterproof performance, which is characterized in that anti-being laid with
Before the process of water coiled material layer (5), the step S20 further includes：
Low ratio foamed polyethylene board separation layer (4) are laid on the basis of sand finish layer (3) of formation.
3. the method according to claim 1 for improving foundation pit SMW fender post waterproof performance, which is characterized in that the slip casting
The outside of pipe (23) is enclosed with rubber ring (24).
4. the method according to claim 1 for improving foundation pit SMW fender post waterproof performance, which is characterized in that the slip casting
Inner side slot of the burial place of pipe (23) close to every fashioned iron of foundation pit SMW supporting construction.
5. the method according to claim 1 for improving foundation pit SMW fender post waterproof performance, which is characterized in that the excessive slurry
Hole (231) is in quincuncial arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777840.7A CN108824446A (en) | 2018-07-16 | 2018-07-16 | A method of improving foundation pit SMW fender post waterproof performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777840.7A CN108824446A (en) | 2018-07-16 | 2018-07-16 | A method of improving foundation pit SMW fender post waterproof performance |
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| CN108824446A true CN108824446A (en) | 2018-11-16 |
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| CN201810777840.7A Pending CN108824446A (en) | 2018-07-16 | 2018-07-16 | A method of improving foundation pit SMW fender post waterproof performance |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204691089U (en) * | 2015-02-09 | 2015-10-07 | 海南红杉科创实业有限公司 | Light roofing system |
| CN106284327A (en) * | 2016-09-13 | 2017-01-04 | 上海隧道工程有限公司 | The construction method that formed steel construction in cement mixing method and micro-disturbance thereof are pulled out |
| CN107542115A (en) * | 2017-08-25 | 2018-01-05 | 广西金雨伞防水装饰有限公司 | Underground project waterproof structure and its construction method |
| CN207228173U (en) * | 2017-08-25 | 2018-04-13 | 广西金雨伞防水装饰有限公司 | A kind of underground project waterproof structure |
-
2018
- 2018-07-16 CN CN201810777840.7A patent/CN108824446A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204691089U (en) * | 2015-02-09 | 2015-10-07 | 海南红杉科创实业有限公司 | Light roofing system |
| CN106284327A (en) * | 2016-09-13 | 2017-01-04 | 上海隧道工程有限公司 | The construction method that formed steel construction in cement mixing method and micro-disturbance thereof are pulled out |
| CN107542115A (en) * | 2017-08-25 | 2018-01-05 | 广西金雨伞防水装饰有限公司 | Underground project waterproof structure and its construction method |
| CN207228173U (en) * | 2017-08-25 | 2018-04-13 | 广西金雨伞防水装饰有限公司 | A kind of underground project waterproof structure |
Non-Patent Citations (2)
| Title |
|---|
| 刘宝兴: "《路基工程新技术实用全书 公路•铁路•机场场道 第3卷》", 31 May 2001 * |
| 吴波: "《高速铁路大断面城市隧道施工技术研究》", 30 June 2016, 安徽科学技术出版社 * |
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Application publication date: 20181116 |
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| RJ01 | Rejection of invention patent application after publication |