CN109457717A - A kind of structure and construction method of big thickness pile-raft foundation off-loading separation layer - Google Patents
A kind of structure and construction method of big thickness pile-raft foundation off-loading separation layer Download PDFInfo
- Publication number
- CN109457717A CN109457717A CN201811302132.4A CN201811302132A CN109457717A CN 109457717 A CN109457717 A CN 109457717A CN 201811302132 A CN201811302132 A CN 201811302132A CN 109457717 A CN109457717 A CN 109457717A
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- Prior art keywords
- raft foundation
- separation layer
- hole stake
- loading separation
- raft
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses the structures and construction method of a kind of big thickness pile-raft foundation off-loading separation layer, its structure includes being located in the ground artificial natively datum hole stake (8) being arranged between subsoil (1) and raft foundation (7), is manually natively equipped with off-loading separation layer between datum hole stake and artificial natively datum hole stake；Off-loading separation layer includes the concrete cushion (2) set gradually from the bottom to top, mortar levelling layer (3), coil waterproof layer (4), water-proof concrete protective layer (5) and extruded sheet (6).The present invention avoids the interaction of direct force between subsoil and raft foundation, so that raft foundation be avoided to generate fatigue rupture under action of long-term load.Therefore under the premise of meeting the design normal use time limit, the building foundation normal use time limit is extended, the purpose for extending the building normal use time limit is realized.The present invention has technically simple, scene directly laying, high-efficient, the reliable in quality of installation laying, the construction period short feature low with labor intensive.
Description
Technical field
The present invention relates to the structure and construction method of a kind of big thickness pile-raft foundation off-loading separation layer, belong to building lot with
Infrastructure technologies field.
Background technique
In super high-rise building engineering, pile-raft foundation using relatively broad.Pile-raft foundation includes artificially datum hole stake, people
Building site datum hole stake extends to underground subsoil, is artificially equipped with raft foundation at the top of datum hole stake and subsoil.
It is subsoil top construction cushion coat between hole stake and hole stake, levelling after the completion of the prior art is hole pile driving construction
The construction of raft foundation is directly carried out after layer, coil waterproof layer, water-proof concrete protective layer.The construction method of the prior art causes
Between raft foundation and subsoil power interaction and artificially between datum hole stake and subsoil the interaction of power is same
When generate.Between raft foundation and subsoil under the long-term interaction of power, raft foundation can generate fatigue rupture, thus
The serviceability limit state and durability for influencing the basis of raft plate, to influence whole building construction quality and normal use year
Limit.
Summary of the invention
The object of the present invention is to provide the structure and construction method of a kind of big thickness pile-raft foundation off-loading separation layer, with
There are suitable deformations between permission subsoil and raft foundation, and upper load can be allowed to pass through artificially datum hole stake and transmitted
Onto subsoil, allows artificially between datum hole stake and subsoil by the interaction of power, avoid subsoil and raft plate
The interaction of direct force between basis, so that raft foundation is avoided to generate fatigue rupture under action of long-term load, therefore full
Under the premise of the foot design normal use time limit, extend the normal use time limit of raft foundation, to realize that extension building normally makes
With the purpose and overcome the deficiencies in the prior art of the time limit.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of structure of big thickness pile-raft foundation off-loading separation layer of the invention, including it is located in the ground subsoil and raft foundation
Between the artificially datum hole stake that is arranged；The stake of artificially datum hole and artificially datum hole between underground subsoil and raft foundation
Off-loading separation layer is equipped between stake in gap；It is characterized by: off-loading separation layer includes the concrete set gradually from the bottom to top
Bed course, mortar levelling layer, coil waterproof layer, concrete cover and extruded sheet.
In aforementioned structure, the extruded sheet layer extruded sheet with a thickness of 8~12mm.
In aforementioned structure, the compression strength of the extruded sheet layer extruded sheet is 100~300kPa.
In aforementioned structure, the elasticity modulus of the extruded sheet layer extruded sheet is 0.3~1MPa.
In aforementioned structure, the raft foundation is big thickness Reinforced Concrete Raft plate basis, and the thickness of raft foundation is not small
In 1000mm.
The present invention is used for a kind of construction method of above structure, in the structure for carrying out big thickness pile-raft foundation off-loading separation layer
When construction, construct according to the following steps:
Step 1: construction artificially datum hole stake, hole stake should extend to underground subsoil；Concrete strength to hole stake, which reaches, to be set
After counting intensity 100%, the ground between hole stake and hole stake is cleaned up by mechanical equipment, reserves 200~300mm using artificial
Cleaning；
Step 2: concrete cushion of constructing on the subsoil of underground；
Step 3: screed-coat of constructing on concrete cushion；
Step 4: being laid with coil waterproof layer on screed-coat；
Step 5: concrete cover of constructing on coil waterproof layer；
Step 6: being directly laid with extruded sheet on it after concrete cover intensity reaches 1.2N/mm2；
Step 7: raft foundation of constructing on extruded sheet.
In preceding method, when carrying out raft foundation construction, steel mesh in raft foundation all using mechanical connection or
Binding connection: forbid using welding.
In preceding method, the flatness deviation of the screed-coat and water-proof concrete protective layer is controlled in ± 5mm.
By adopting the above-described technical solution, compared with prior art, the present invention the invention has the following beneficial effects: logical
The setting off-loading separation layer between underground subsoil and raft foundation is crossed, allows to exist between subsoil and raft foundation suitable
The deformation of amount.Upper load can be allowed to be transmitted on subsoil by artificially datum hole stake, allow artificially datum hole stake and natural
By the interaction of power between ground, the interaction of direct force between underground subsoil and raft foundation is avoided, thus
Raft foundation is avoided to generate fatigue rupture under action of long-term load.Therefore under the premise of meeting the design normal use time limit, prolong
The building foundation normal use time limit has been grown, the purpose for extending the building normal use time limit is realized.The present invention has technology letter
Single, scene is directly laid with, and installation is laid with high-efficient, reliable in quality, the construction period short feature low with labor intensive.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the construction procedure schematic diagram of off-loading separation layer of the invention.
In the figure, it is marked as the underground 1- subsoil, 2- concrete cushion, 3- screed-coat, 4- coil waterproof layer, 5- concrete
Protective layer, 6- extruded sheet, 7- raft foundation, 8- manually natively datum hole stake.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
The structure of a kind of big thickness pile-raft foundation off-loading separation layer of the invention, as shown in Figure 1, including being located in the ground naturally
The artificially datum hole stake 8 being arranged between ground 1 and raft foundation 7；It is artificial between underground subsoil 1 and raft foundation 7
Off-loading separation layer is equipped between ground datum hole stake 8 and artificially datum hole stake 8 in gap；Off-loading separation layer includes successively setting from the bottom to top
Concrete cushion 2, mortar levelling layer 3, coil waterproof layer 4, concrete cover 5 and the extruded sheet 6 set.The thickness of extruded sheet 6
For 8~12mm.The compression strength of extruded sheet 6 is 100~300kPa.The elasticity modulus of extruded sheet 6 is 0.3~1MPa；Raft plate base
Plinth 7 is the big thickness Reinforced Concrete Raft plate basis in big section, and the thickness of raft foundation 7 is not less than 1000mm.
For a kind of construction method of the invention of above structure construction, as shown in Fig. 2, carrying out big thickness pile-raft foundation
When the structure construction of off-loading separation layer, construct according to the following steps:
Step 1: construction artificially datum hole stake, hole stake should extend to underground subsoil；Concrete strength to hole stake, which reaches, to be set
After counting intensity 100%, the ground between hole stake and hole stake is cleaned up by mechanical equipment, reserves 200~300mm using artificial
Cleaning；
Step 2: concrete cushion of constructing on the subsoil of underground；
Step 3: screed-coat of constructing on concrete cushion；
Step 4: being laid with coil waterproof layer on screed-coat；
Step 5: concrete cover of constructing on coil waterproof layer；
Step 6: being directly laid with extruded sheet on it after concrete cover intensity reaches 1.2N/mm2；
Step 7: raft foundation of constructing on extruded sheet.
When carrying out raft foundation construction, the steel mesh in raft foundation is all connected using mechanical connection or binding: tight
Prohibit using welding.The flatness deviation of screed-coat and concrete cover is controlled in ± 5mm.
Embodiment
The structure of this example is as shown in Figure 1.Off-loading separation layer includes the concrete cushion 2 set gradually from the bottom to top, levelling
Layer 3, coil waterproof layer 4, concrete cover 5 and extruded sheet 6.
When Specific construction, advanced pedestrian's work natively datum hole pile driving construction, to the manually natively pile concrete of datum hole stake
After intensity reaches design strength 100%, it can excavate.It can first be excavated using mechanical equipment when excavation, when with being excavated to distance
Hand excavation is used when lower 200 ~ 300mm of bearing layer.To prevent mechanical equipment from destructively descending subsoil.
At least one plane of screed-coat, can also there are two or multiple and different absolute altitudes plane.Two different levels
The inner corner trim that plane is formed is all made of arc transition with external corner and connects.
When carrying out coil waterproof layer construction, before brushing base treatment agent, it is necessary to the dust sundries of levelling layer surface
It thoroughly cleans up, to ensure the sticking Quality of coil waterproof layer.
Concrete cover wants its flatness of strict control, and to guarantee that extruded sheet pastes flatness, extrusion molding plate flatness is inclined
Difference control is in ± 5mm.Concrete cover surface impurity, ponding must be cleared up before pasting extruded sheet, ensure that concrete is protected
Sheath dry tack free is without ponding.
Claims (8)
1. a kind of structure of big thickness pile-raft foundation off-loading separation layer, including be arranged in underground subsoil (1) and raft foundation
(7) the artificially datum hole stake (8) between；It is characterized by: artificial between underground subsoil (1) and raft foundation (7)
Off-loading separation layer is equipped in ground datum hole stake (8) gap；Off-loading separation layer includes the concrete cushion set gradually from the bottom to top
(2), mortar levelling layer (3), coil waterproof layer (4), concrete cover (5) and extruded sheet (6).
2. the structure of big thickness pile-raft foundation off-loading separation layer according to claim 1, it is characterised in that: the extruded sheet
(6) with a thickness of 8~12mm.
3. the structure of big thickness pile-raft foundation off-loading separation layer according to claim 1, it is characterised in that: the extruded sheet
(6) compression strength is 100~300kPa.
4. the structure of big thickness pile-raft foundation off-loading separation layer according to claim 1, it is characterised in that: the extruded sheet
(6) elasticity modulus is 0.3~1MPa.
5. the structure of big thickness pile-raft foundation off-loading separation layer according to claim 1, it is characterised in that: the raft foundation
It (7) is big thickness Reinforced Concrete Raft plate basis, the thickness of raft foundation (7) is not less than 1000mm.
6. a kind of construction method for any structure described in Claims 1 to 5, it is characterised in that: carrying out big thickness stake raft
When the structure construction of basic off-loading separation layer, construct according to the following steps:
Step 1: construction artificially datum hole stake, hole stake should extend to underground subsoil；Concrete strength to hole stake, which reaches, to be set
After counting intensity 100%, the ground between hole stake and hole stake is cleaned up by mechanical equipment, reserves 200~300mm using artificial
Cleaning；
Step 2: concrete cushion of constructing on the subsoil of underground；
Step 3: screed-coat of constructing on concrete cushion；
Step 4: being laid with coil waterproof layer on screed-coat；
Step 5: concrete cover of constructing on coil waterproof layer；
Step 6: reaching 1.2N/mm in concrete cover intensity2Afterwards, it is directly laid with extruded sheet on it；
Step 7: raft foundation of constructing on extruded sheet.
7. construction method according to claim 6, it is characterised in that: when carrying out raft foundation construction, in raft foundation
Steel mesh is all connected using mechanical connection or binding: being forbidden using welding.
8. construction method according to claim 6, it is characterised in that: the flatness of the screed-coat and concrete cover is inclined
Difference control is in ± 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302132.4A CN109457717A (en) | 2018-11-02 | 2018-11-02 | A kind of structure and construction method of big thickness pile-raft foundation off-loading separation layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811302132.4A CN109457717A (en) | 2018-11-02 | 2018-11-02 | A kind of structure and construction method of big thickness pile-raft foundation off-loading separation layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109457717A true CN109457717A (en) | 2019-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811302132.4A Pending CN109457717A (en) | 2018-11-02 | 2018-11-02 | A kind of structure and construction method of big thickness pile-raft foundation off-loading separation layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502180A (en) * | 2020-12-09 | 2021-03-16 | 苏州第五建筑集团有限公司 | Construction method of deep foundation pit basement bottom raft |
| CN113006115A (en) * | 2021-02-10 | 2021-06-22 | 国机集团科学技术研究院有限公司 | Design process of conical separated lock catch type raft foundation vibration isolation uplift pile |
Citations (4)
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|---|---|---|---|---|
| CN102535523A (en) * | 2010-12-14 | 2012-07-04 | 北京仁创科技集团有限公司 | Foundation structure and construction method thereof, as well as building |
| JP2014148865A (en) * | 2013-02-04 | 2014-08-21 | Grape Co Ltd | Foundation structure |
| CN104372806A (en) * | 2014-11-17 | 2015-02-25 | 山东科技大学 | Mountain area reinforced concrete hollow-cone flexible wind power foundation and construction method thereof |
| CN209179081U (en) * | 2018-11-02 | 2019-07-30 | 中建四局第六建筑工程有限公司 | A kind of pile-raft foundation off-loading insulation layer structure |
-
2018
- 2018-11-02 CN CN201811302132.4A patent/CN109457717A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535523A (en) * | 2010-12-14 | 2012-07-04 | 北京仁创科技集团有限公司 | Foundation structure and construction method thereof, as well as building |
| JP2014148865A (en) * | 2013-02-04 | 2014-08-21 | Grape Co Ltd | Foundation structure |
| CN104372806A (en) * | 2014-11-17 | 2015-02-25 | 山东科技大学 | Mountain area reinforced concrete hollow-cone flexible wind power foundation and construction method thereof |
| CN209179081U (en) * | 2018-11-02 | 2019-07-30 | 中建四局第六建筑工程有限公司 | A kind of pile-raft foundation off-loading insulation layer structure |
Non-Patent Citations (1)
| Title |
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| 张武廷;陈成意;: "桩、筏形基础地下防水工程设计与施工", 施工技术, no. 10, pages 1 - 3 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502180A (en) * | 2020-12-09 | 2021-03-16 | 苏州第五建筑集团有限公司 | Construction method of deep foundation pit basement bottom raft |
| CN113006115A (en) * | 2021-02-10 | 2021-06-22 | 国机集团科学技术研究院有限公司 | Design process of conical separated lock catch type raft foundation vibration isolation uplift pile |
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