CN208533543U - Improve the structure and foundation pit SMW supporting construction of foundation pit side-wall waterproof performance - Google Patents
Improve the structure and foundation pit SMW supporting construction of foundation pit side-wall waterproof performance Download PDFInfo
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- CN208533543U CN208533543U CN201821125826.0U CN201821125826U CN208533543U CN 208533543 U CN208533543 U CN 208533543U CN 201821125826 U CN201821125826 U CN 201821125826U CN 208533543 U CN208533543 U CN 208533543U
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- Prior art keywords
- foundation pit
- smw
- grouting pipe
- supporting construction
- waterproof performance
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Abstract
The utility model provides a kind of structure and foundation pit SMW supporting construction for improving foundation pit side-wall waterproof performance, wherein, the foundation pit SMW building enclosure includes: structure side wall (1) in sequentially connected foundation pit, waterproof roll layer (5), sand finish layer (3) and foundation pit SMW supporting construction (2)；The foundation pit SMW supporting construction (2) includes: multiple SMW pile bodies (22), the Grouting Pipe (23) being arranged in each SMW pile body (22)；Multiple extravasating holes (231) are set on the Grouting Pipe (23)；Filled with cement slurry in the Grouting Pipe (23) and in the cavity between Grouting Pipe (23) and foundation pit SMW pile body (22).The utility model 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 utility model relates to technical field of building construction, more particularly, to a kind of knot for improving foundation pit side-wall waterproof performance
Structure and foundation pit SMW supporting construction.
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:
First, the cement soil pile water-stagnating effect that the fashioned iron in foundation pit SMW supporting construction is left after extracting is poor；
Second, being easy to cause the destruction for the waterproof roll being laid on the inside of structure side wall 1 in foundation pit during extracting fashioned iron.
Utility model content
The purpose of this utility model be presently, there are aiming at the problem that, provide it is a kind of improve foundation pit side-wall waterproof performance knot
Structure and foundation pit SMW supporting construction, can effectively improve the waterproof effect of structure side wall in foundation pit, so as to solve foundation pit
Influence after fashioned iron is extracted in SMW to cement soil pile waterproof performance in foundation pit.
The purpose of this utility model is achieved through the following technical solutions:
The purpose of the utility model is to provide a kind of structures for improving foundation pit side-wall waterproof performance comprising:
Structure side wall, waterproof roll layer, sand finish layer and foundation pit SMW supporting construction in sequentially connected foundation pit；
The foundation pit SMW supporting construction includes: multiple SMW pile bodies, is arranged in each SMW intracorporal Grouting Pipe；It is described
Multiple extravasating holes are set in Grouting Pipe；Filled with cement slurry in the Grouting Pipe and in the cavity between Grouting Pipe and SMW pile body.
It is highly preferred that be additionally provided between the waterproof roll layer and the sand finish layer low ratio foamed polyethylene board every
Absciss layer.
It is highly preferred that being wrapped in rubber ring outside the Grouting Pipe.
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.
The utility model also provides a kind of foundation pit SMW supporting construction for improving waterproof performance comprising:
Multiple SMW pile bodies are arranged in each SMW intracorporal Grouting Pipe；Multiple extravasating holes are set in the Grouting Pipe；Institute
It states in Grouting Pipe and in the cavity between Grouting Pipe and foundation pit SMW pile body filled with cement slurry.
It is highly preferred that being wrapped in rubber ring outside the Grouting Pipe.
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.
The utility model has the following technical effect that it can be seen from above-mentioned the technical solution of the utility model
The utility model leaves the technology in the gap of cement soil pile by burying Grouting Pipe after filling section steel extraction, mention
The waterproof effect of structure side wall in high foundation pit, to solve the water left after the fashioned iron in foundation pit SMW supporting construction is extracted
The technical problem of soil pile body water-stagnating effect difference.
The utility model between SMW supporting construction pile body and side wall waterproof roll by adding one layer of low ratio foamed polyethylene
The technology of benzene plate separation layer avoids and the waterproof roll that structure side wall 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 building enclosure in the prior art；
Fig. 2 is the floor plan for the structure that the utility model improves foundation pit side-wall waterproof performance；
Fig. 3 is the A-A view of Fig. 2；
Fig. 4 is the B partial enlargement diagram in Fig. 3；
Fig. 5 is the structural schematic diagram of the Grouting Pipe in the utility model；
Fig. 6 is the implementation flow chart of the utility model；
Fig. 7 be the utility model 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 utility model is described in further details.
Embodiment one:
The utility model provides a kind of structure for improving foundation pit side-wall waterproof performance, and structure is as shown in Fig. 2 ,-Fig. 5.It can
It successively include: structure side wall 1 in foundation pit, waterproof roll layer 5, the poly- second of low ratio foamed in foundation pit SMW building enclosure to find out
Alkene plate separation layer 4, sand finish layer 3, foundation pit SMW supporting construction 2；Wherein foundation pit SMW supporting construction 2 includes: multiple SMW pile bodies
22, multiple Grouting Pipes 23 are provided in each SMW pile body 22, Grouting Pipe 23 is equipped with extravasating hole 231, wraps up outside Grouting Pipe 23
There is a rubber ring 24, cement slurry is full of in Grouting Pipe 23 and in the cavity between Grouting Pipe 23 and SMW pile body 22.
The position of Grouting Pipe 23 still as shown in Fig. 2, in the inner side slot of fashioned iron 21 be arranged two Grouting Pipes 23, with
Fashioned iron is inserted into pit slot soil cement simultaneously, and 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
The following set depth in Foundation Pit bottom, the set depth can be 1m.
The structure of Grouting Pipe 23 is as shown in figure 5, the Grouting Pipe 23 can use steel pipe, such as the hot finished steel pipe of φ 42mm, note
It starches and 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, can also
To be arranged in other shapes, such as it is staggered in arrangement, the pitch-row between the two neighboring extravasating hole 231 of 23 axis direction of Grouting Pipe is many
In setting 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.
A kind of structure of above-mentioned improvement foundation pit side-wall waterproof performance, can implement to complete, process by the following method
As shown in fig. 6, including the 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.
Step S20 constructs to foundation pit SMW supporting construction 2, and in the construction process first to 22 side of foundation pit SMW pile body
Wall applies 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, is re-layed
Waterproof roll 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 will be generated along earth formation, infiltration, densification, cleaves and flows, to reach the gap after filling section steel 21 is extracted, mentioned
Height leaves cement soil pile anti-permeability performance purpose.
By the utility model it can be seen from above-mentioned the technical solution of the utility model by the way that " filling section steel is left after extracting
The gap of cement soil pile " and " one layer of low ratio foamed polyethylene benzene plate is added between SMW supporting construction pile body and waterproof roll layer
The technology of separation layer " improves foundation pit main structure side wall waterproof effect.
Embodiment two:
Embodiment two has lacked one added between SMW supporting construction pile body and waterproof roll layer compared with embodiment one
Layer low ratio foamed polyethylene benzene plate separation layer 4.
Embodiment three:
Embodiment three has lacked the rubber ring 24 outside Grouting Pipe 23 compared with embodiment one.In this case, working as foundation pit SMW branch
After the completion of the main structure construction of protection structure 2, fashioned iron 21 is extracted, slip casing by pressure is carried out to Grouting Pipe 23 after the extraction of fashioned iron 21,
Slurries are cement slurry, and slurries overflow inside Grouting Pipe 23 along extravasating hole 231, under the action of interior pressure along landing surface knot
Structure generates filling, infiltration, densification, splitting flowing, to reach the gap after filling section steel 21 is extracted, cement earth pile is left in raising
Body anti-permeability performance purpose.
Example IV:
The utility model also provides a kind of foundation pit SMW supporting construction for improving waterproof performance comprising multiple SMW pile bodies
22, Grouting Pipe 23 is provided in each SMW pile body 22, Grouting Pipe 23 is equipped with extravasating hole 231, is enclosed with rubber outside Grouting Pipe 23
Cushion rubber 24 is full of cement slurry in Grouting Pipe 23 and in the cavity between Grouting Pipe 23 and SMW pile body 22.Foundation pit SMW supporting
The structure of Grouting Pipe 23 in structure is identical as the associated description in above-described embodiment, no longer elaborates here.
Foundation pit SMW supporting construction in the example IV can not also include rubber ring 24.
It is to be illustrated so that each fashioned iron of correspondence buries two Grouting Pipes 23 as an example, but this is practical in above-described embodiment
It is novel to be not limited thereto, each fashioned iron embedded one or more root Grouting Pipes 23 can also be corresponded to and realize this reality to reach
With novel purpose.
Although the utility model has been described by way of example and in terms of the preferred embodiments, embodiment does not limit the utility model.Not
It is detached from the spirit and scope of the utility model, any equivalent change or retouch done also belongs to the guarantor of the utility model
Protect range.Therefore the protection scope of the utility model should be based on the content defined in the claims of this application.
Claims (7)
1. a kind of structure for improving foundation pit side-wall waterproof performance, which is characterized in that the knot for improving foundation pit side-wall waterproof performance
Structure includes:
Structure side wall (1), waterproof roll layer (5), sand finish layer (3) and foundation pit SMW supporting construction in sequentially connected foundation pit
(2)；
The foundation pit SMW supporting construction (2) includes: multiple SMW pile bodies (22), the slip casting being arranged in each SMW pile body (22)
It manages (23)；Multiple extravasating holes (231) are set on the Grouting Pipe (23)；In the Grouting Pipe (23) and Grouting Pipe (23) with
Filled with cement slurry in cavity between SMW pile body (22).
2. a kind of structure for improving foundation pit side-wall waterproof performance according to claim 1, which is characterized in that in the waterproof
Low ratio foamed polyethylene board separation layer (4) is additionally provided between coiled material layer (5) and the sand finish layer (3).
3. a kind of structure for improving foundation pit side-wall waterproof performance according to claim 1 or 2, which is characterized in that the note
Rubber ring (24) are wrapped in outside slurry pipe (23).
4. a kind of structure for improving foundation pit side-wall waterproof performance according to claim 1, which is characterized in that the Grouting Pipe
(23) inner side slot of the burial place close to every fashioned iron of foundation pit SMW supporting construction.
5. a kind of foundation pit SMW supporting construction for improving waterproof performance, which is characterized in that the foundation pit SMW supporting construction includes:
Multiple SMW pile bodies (22), the Grouting Pipe (23) being arranged in each SMW pile body (22)；It is arranged on the Grouting Pipe (23)
Multiple extravasating holes (231)；It is filled in the Grouting Pipe (23) and in the cavity between Grouting Pipe (23) and foundation pit SMW pile body (22)
There is cement slurry.
6. a kind of foundation pit SMW supporting construction for improving waterproof performance according to claim 5, which is characterized in that the note
Rubber ring (24) are wrapped in outside slurry pipe (23).
7. a kind of foundation pit SMW supporting construction for improving waterproof performance according to claim 5 or 6, which is characterized in that described
Inner side slot of the burial place of Grouting Pipe (23) close to every fashioned iron of foundation pit SMW supporting construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821125826.0U CN208533543U (en) | 2018-07-16 | 2018-07-16 | Improve the structure and foundation pit SMW supporting construction of foundation pit side-wall waterproof performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821125826.0U CN208533543U (en) | 2018-07-16 | 2018-07-16 | Improve the structure and foundation pit SMW supporting construction of foundation pit side-wall waterproof performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208533543U true CN208533543U (en) | 2019-02-22 |
Family
ID=65387979
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821125826.0U Expired - Fee Related CN208533543U (en) | 2018-07-16 | 2018-07-16 | Improve the structure and foundation pit SMW supporting construction of foundation pit side-wall waterproof performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208533543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319314A (en) * | 2022-01-24 | 2022-04-12 | 信息产业部电子综合勘察研究院 | Construction method for constructing large-thickness collapsible loess foundation by utilizing profile steel cement soil mixing wall |
-
2018
- 2018-07-16 CN CN201821125826.0U patent/CN208533543U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319314A (en) * | 2022-01-24 | 2022-04-12 | 信息产业部电子综合勘察研究院 | Construction method for constructing large-thickness collapsible loess foundation by utilizing profile steel cement soil mixing wall |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190222 |