CN110130364A - Foundation pit list supports support replacement construction method - Google Patents
Foundation pit list supports support replacement construction method Download PDFInfo
- Publication number
- CN110130364A CN110130364A CN201910450821.8A CN201910450821A CN110130364A CN 110130364 A CN110130364 A CN 110130364A CN 201910450821 A CN201910450821 A CN 201910450821A CN 110130364 A CN110130364 A CN 110130364A
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- support replacement
- piping chamber
- supporting
- support
- 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
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- 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
Abstract
The present invention provides a kind of foundation pit lists to support support replacement construction method, and this method comprises the following steps: installing supporting and retaining system formula supporting construction in the inner wall of foundation pit, and pours piping chamber in foundation pit, and pours the side wall of piping chamber to the first preset height；When the intensity of piping chamber reaches the first preset value, support replacement strip is poured at the top of piping chamber；When the intensity of fagging band to be changed reaches the second preset value, coarse sand is filled between supporting and retaining system formula supporting construction and the side wall of piping chamber and is compacted to the second preset height, and to coarse sand；When the compactness of coarse sand reaches third preset value, plain concrete band is poured above coarse sand, and the intensity of the first maintenance plain concrete band is to the 4th preset value；Original unidirectional support is removed, and is poured above support replacement strip for current functional compartments.The present invention solves conflicting between Underground Construction and supporting support, increases the safety of construction, whole process construction is simple, piping chamber and functional compartments Clear partition, is conducive to the maintenance in later period.
Description
Technical field
The present invention relates to foundation pit support replacement technical fields, support support replacement construction method in particular to a kind of foundation pit list.
Background technique
For needing the underground engineering of excavation pit, supporting and retaining system formula structure is a kind of most common support shape in pattern foundation pit supporting structure
Formula, supporting and retaining system formula structure need to use stull in Bracing Process to increase the rigidity of entire supporting and retaining system formula structure.Referring to Fig. 1, when applying
When work structure base slab 5', conflict is not present in stull 1' therewith；But when the upper part of constructing structure side wall 6' and top plate 7', bottom
The main structure body that plate 5', structure side wall 6' and top plate 7' are constituted just exists with stull 1' to conflict, at this time must be by stull 1'
It removes, can continue the superstructure of construction structures, the i.e. upper part of structure side wall 6' and top plate 7', but for being only arranged
For one of stull 1', in the biggish situation of foundation depth, removing stull 1' will make foundation pit there is the danger collapsed.
Referring to fig. 2, for technique is supportted in traditional changeing, usually bottom of foundation ditch has poured plain concrete cushion layer 3',
Bottom plate 5' is poured on plain concrete cushion layer 3', after having poured bottom plate 5', in bottom plate 5' and retaining structure 2'(support pile) between
Casting concrete 4' allows bottom plate and retaining structure 2' to form temporary support, but since underground structure size is larger, foundation depth compared with
Deep, retaining structure 2' leakage height (cantilever span) more than the road temporary support is excessively high, after having removed stull 1', foundation pit two
Side soil body lateral pressure is excessive, and there are biggish deep pit monitor hidden danger, so conventional method is unworkable；It is another referring to Fig. 3
Method is to construct together a part when pouring bottom plate 5' together with structure side wall 6', the height construction of part-structure side wall 6'
After forming temporary support to satisfaction, retaining structure 2' leakage cantilever height can be reduced to allowed band, although outside retaining structure 2'
Leakage cantilever height reduces, but structure side wall 6' cantilever height increases, and foundation pit side wall is excessive by foundation pit lateral pressure, and there are structures
There are the hidden danger of strain cracking by side wall 6', and equally also making deep pit monitor, there are hidden danger.
Summary of the invention
In consideration of it, the invention proposes a kind of foundation pit lists to support support replacement construction method, it is intended to solve to deposit when current foundation pit support replacement
In the problem of foundation pit collapse danger.
The invention proposes a kind of foundation pit lists to support support replacement construction method, and this method comprises the following steps: in the inner wall of foundation pit
Supporting and retaining system formula supporting construction is installed, and pours piping chamber in foundation pit, and pours the side wall of piping chamber to the first preset height；To pipe
When the intensity of road room reaches the first preset value, support replacement strip is poured at the top of piping chamber；The intensity of fagging band to be changed reaches
When two preset values, coarse sand is filled between supporting and retaining system formula supporting construction and the side wall of piping chamber to the second preset height, and to coarse sand
Compacting；When the compactness of coarse sand reaches third preset value, plain concrete band is poured above coarse sand, and the first maintenance element is mixed
The intensity of solidifying soil zone is to the 4th preset value；Original unidirectional support is removed, and is poured above support replacement strip for passing through
Functional compartments.
Further, in above-mentioned foundation pit list support support replacement construction method, the first preset height is in place higher than support replacement strip institute
Set the height of 100mm.
Further, in above-mentioned foundation pit list support support replacement construction method, the first preset value is intensity when piping chamber solidifies completely
75%.
Further, in above-mentioned foundation pit list support support replacement construction method, the second preset height for support replacement strip lower surface institute
Height in position.
Further, in above-mentioned foundation pit list support support replacement construction method, the thickness with a thickness of support replacement strip of plain concrete band.
Further, in above-mentioned foundation pit list support support replacement construction method, the inner wall of foundation pit install supporting and retaining system formula supporting construction and
It is being poured between piping chamber in foundation pit further include: pour plain concrete cushion layer in the bottom of foundation pit.
Further, in above-mentioned foundation pit list support support replacement construction method, it is default to reach second in the intensity of the support replacement strip
When value, between the supporting and retaining system formula supporting construction and the piping chamber before filling coarse sand to the second preset height further include:
The surface of supporting and retaining system formula supporting construction is laid with separation layer.
In the present invention, piping chamber and functional compartments, the pipelines such as piping chamber current supply cable, HVAC, water supply, fire-fighting have been poured in foundation pit
Installation, functional compartments then play effect of building itself, meanwhile, between piping chamber and supporting and retaining system formula supporting construction filled with coarse sand,
And concrete belt of being always or usually as specified is poured, plain concrete cushion layer has been poured between piping chamber and foundation pit, has poured support replacement at the top of piping chamber
Strip, piping chamber, coarse sand, plain concrete band, plain concrete cushion layer and support replacement strip constitute together with " inner support ", should " inner support "
Supporting and retaining system formula supporting construction and foundation pit can be supported when original unidirectional support is dismantled, prevent collapsing phenomenon from occurring, increased
The safety for having added construction, later when carrying out functional compartments construction, since original unidirectional support has removed, so not depositing
The problem of original unidirectional support conflicts with functional compartments, meanwhile, whole process construction is simple, piping chamber and functional compartments subregion are bright
Really, be conducive to the maintenance in later period.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the presence of the schematic diagram to conflict between stull and structure side wall and top plate in the prior art；
Fig. 2 is the structural schematic diagram of foundation pit support construction in the prior art；
Fig. 3 is the another structural schematic diagram of foundation pit support construction in the prior art；
Fig. 4 is the flow chart that foundation pit list provided in an embodiment of the present invention supports support replacement construction method；
Fig. 5 is the structural schematic diagram that foundation pit list provided in an embodiment of the present invention supports underground structure in support replacement construction method；
Fig. 6 is that foundation pit list provided in an embodiment of the present invention supports in support replacement construction method, and underground structure is put into the structure of foundation pit
Schematic diagram.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.It should be noted that in the absence of conflict, embodiment in the present invention and
Feature in embodiment can be combined with each other.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 4, Fig. 4 is the flow chart that foundation pit list provided in this embodiment supports support replacement construction method.As shown in figure 4, should
Method includes the following steps:
Step S410 installs supporting and retaining system formula supporting construction in the inner wall of foundation pit, and pours piping chamber in foundation pit, and pour to
At the side wall of piping chamber to the first preset height.
Specifically, the preferred structure of the underground structure provided in this embodiment being put into foundation pit is shown referring to Fig. 5, Fig. 5.
As shown in figure 5, the underground structure includes: piping chamber 2 and functional compartments 7, functional compartments 7 are set to the top of piping chamber 2, piping chamber 2
It is separated with functional compartments 7 by support replacement strip 8.Referring to Fig. 6, the supporting of supporting and retaining system formula is set in the inner sidewall of the foundation pit dug in advance
Then structure 3 first pours plain concrete cushion layer 1 in the bottom of foundation pit, and pours piping chamber 2 in the top of plain concrete cushion layer 1
Bottom plate 22 and side wall 21, then pour the top plate of piping chamber 2, which is support replacement strip 8.21 height of side wall of piping chamber 2
At one-time-concreting to the first preset height, specifically, more than the 21 height one-time-concreting to piping chamber top plate of side wall of piping chamber 2
100mm, and the reinforcing bar for carrying out the top plate of piping chamber 2 is reserved.The pipelines such as the space current supply cable of piping chamber 2, HVAC, water supply, fire-fighting
Installation.In order to guarantee recycling for supporting and retaining system formula structure 3 (steel sheet pile class), supporting and retaining system formula supporting construction 3 surface be laid with every
Absciss layer is recycled with guaranteeing that 3 later period of supporting and retaining system formula structure can smoothly extract.When it is implemented, separation layer can be asphalt felt class
Separation layer.
Step S420 pours support replacement strip when the intensity of piping chamber reaches the first preset value at the top of piping chamber.
Specifically, when the intensity of piping chamber 2 reaches the first preset value, for example, the intensity to piping chamber 2 reaches concrete
Completely solidification when intensity 75% when, at the top of piping chamber 2 pour support replacement strip 8, which is piping chamber 2
Top plate.
Step S430, when the intensity of fagging band to be changed reaches the second preset value, in supporting and retaining system formula supporting construction and piping chamber
Coarse sand is filled between side wall to be compacted to the second preset height, and to coarse sand.
Specifically, when the intensity of fagging band 8 to be changed reaches the second preset value, for example, the intensity of fagging band 8 to be changed reaches mixed
Solidifying soil completely solidification when intensity 75% when, filled between supporting and retaining system formula supporting construction 3 and the side wall 21 of piping chamber 2 coarse sand 4 to
Second preset height, and coarse sand 4 is compacted.When it is implemented, the second preset height is the position where the lower surface of support replacement strip 8
Set height.If the surface of supporting and retaining system formula supporting construction 3 is equipped with separation layer, coarse sand 4 is filled between separation layer and piping chamber 2
To the second preset height.
Step S440 pours plain concrete band when the compactness of coarse sand reaches third preset value above coarse sand, and
The intensity of plain concrete band is conserved to the 4th preset value.
Specifically, when the compactness of coarse sand 4 reaches third preset value, for example, the compactness to coarse sand 4 reaches 95%
When, plain concrete band 5 identical with 8 thickness of support replacement strip is poured in the top of coarse sand 4, and conserve to plain concrete band 5,
Until the intensity of plain concrete band 5 reaches the 4th preset value, for example, until the intensity of plain concrete band 5 reaches 80%.If branch
The surface of gear formula supporting construction 3 is equipped with separation layer, then pours between separation layer and piping chamber 2 and in the top of support replacement strip 8
Build plain concrete band 5.
Original unidirectional support is removed, and poured above support replacement strip for current functional compartments by step S450.
Specifically, original unidirectional support 6 is removed, and pours functional compartments 7 in the top of support replacement strip 8, functional compartments 7 are sent out
The effect of building itself is waved, such as functional compartments 7 can be regard as pedestrian passage or runway, at this point, support replacement strip 8 is both piping chamber
2 top plate, and be the bottom plate of functional compartments 7.
Piping chamber 2 and functional compartments 7,2 current supply cable of piping chamber, HVAC, water supply, fire-fighting have been poured in the present embodiment, in foundation pit
The installation of equal pipelines, functional compartments 7 then play the effect of building itself, meanwhile, it is filled out between piping chamber 2 and supporting and retaining system formula supporting construction 3
Filled with coarse sand 4 and concrete belt 5 of being always or usually as specified is poured, plain concrete cushion layer 1 has been poured between piping chamber 2 and foundation pit, piping chamber 2
Top construction has support replacement strip 8, and piping chamber 2, coarse sand 4, plain concrete band 5, plain concrete cushion layer 1 and support replacement strip 8 constitute one
Road " inner support ", supporting and retaining system formula supporting construction 3 and foundation pit can be propped up when original unidirectional 6 disassembly of support by being somebody's turn to do " inner support "
Support prevents collapsing phenomenon from occurring, increases the safety of construction, later when carrying out the construction of functional compartments 7, due to original list
It has been removed to support 6, so the problem of conflicting there is no original unidirectional support 6 with functional compartments 7, meanwhile, whole process construction
Simply, 7 Clear partition of piping chamber 2 and functional compartments, is conducive to the maintenance in later period.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of foundation pit list supports support replacement construction method, which comprises the steps of:
Supporting and retaining system formula supporting construction is installed in the inner wall of foundation pit, and pours piping chamber in the foundation pit, and pour the piping chamber
Side wall to the first preset height；
When the intensity of the piping chamber reaches the first preset value, support replacement strip is poured at the top of the piping chamber；
When the intensity of the support replacement strip reaches the second preset value, in the side of the supporting and retaining system formula supporting construction and the piping chamber
Coarse sand is filled between wall to be compacted to the second preset height, and to coarse sand；
When the compactness of the coarse sand reaches third preset value, plain concrete band, and first are poured above the coarse sand
The intensity of plain concrete band is conserved to the 4th preset value；
Original unidirectional support is removed, and is poured above the support replacement strip for current functional compartments.
2. foundation pit list according to claim 1 supports support replacement construction method, which is characterized in that
First preset height is the height higher than support replacement strip position 100mm.
3. foundation pit list according to claim 1 supports support replacement construction method, which is characterized in that
First preset value is 75% of intensity when the piping chamber solidifies completely.
4. foundation pit list according to claim 1 supports support replacement construction method, which is characterized in that
Second preset height is the height of the lower surface position of the support replacement strip.
5. foundation pit list according to claim 1 supports support replacement construction method, which is characterized in that
The thickness with a thickness of the support replacement strip of the plain concrete band.
6. foundation pit list according to claim 1 supports support replacement construction method, which is characterized in that in the inner wall branch in foundation pit
If supporting and retaining system formula supporting construction and described being poured between piping chamber in the foundation pit further include:
Plain concrete cushion layer is poured in the bottom of the foundation pit.
7. foundation pit list according to claim 1 supports support replacement construction method, which is characterized in that in the intensity of the support replacement strip
When reaching the second preset value, between the supporting and retaining system formula supporting construction and the piping chamber fill coarse sand to the second preset height it
Before further include:
Separation layer is laid on the surface of the supporting and retaining system formula supporting construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910450821.8A CN110130364A (en) | 2019-05-28 | 2019-05-28 | Foundation pit list supports support replacement construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910450821.8A CN110130364A (en) | 2019-05-28 | 2019-05-28 | Foundation pit list supports support replacement construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110130364A true CN110130364A (en) | 2019-08-16 |
Family
ID=67582089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910450821.8A Pending CN110130364A (en) | 2019-05-28 | 2019-05-28 | Foundation pit list supports support replacement construction method |
Country Status (1)
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| CN (1) | CN110130364A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476331A (en) * | 2007-12-12 | 2009-07-08 | 中国二十冶建设有限公司 | Closed demolition blasting method for internal concrete reinforcement bracing of basement foundation ditch |
| KR101034398B1 (en) * | 2007-06-28 | 2011-05-16 | (주)바로건설기술 | Land-side protection wall that use ground structure |
-
2019
- 2019-05-28 CN CN201910450821.8A patent/CN110130364A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101034398B1 (en) * | 2007-06-28 | 2011-05-16 | (주)바로건설기술 | Land-side protection wall that use ground structure |
| CN101476331A (en) * | 2007-12-12 | 2009-07-08 | 中国二十冶建设有限公司 | Closed demolition blasting method for internal concrete reinforcement bracing of basement foundation ditch |
Non-Patent Citations (2)
| Title |
|---|
| 应惠清等: "《土木工程施工 下册 第三版》", 31 May 2018, 同济大学出版社 * |
| 赵志缙等: "《简明深基坑工程设计施工手册》", 30 April 2000, 中国建筑工业出版社 * |
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Application publication date: 20190816 |
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