CN107288136A - The structure and its method of building foundation pit protection - Google Patents

The structure and its method of building foundation pit protection Download PDF

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Publication number
CN107288136A
CN107288136A CN201710707675.3A CN201710707675A CN107288136A CN 107288136 A CN107288136 A CN 107288136A CN 201710707675 A CN201710707675 A CN 201710707675A CN 107288136 A CN107288136 A CN 107288136A
Authority
CN
China
Prior art keywords
underground
support
building
overturn
exterior
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.)
Pending
Application number
CN201710707675.3A
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Chinese (zh)
Inventor
谭永广
焦程浩
陈高山
于成江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Eighth Engineering Division Co Ltd
Original Assignee
China Construction Eighth Engineering Division Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Construction Eighth Engineering Division Co Ltd filed Critical China Construction Eighth Engineering Division Co Ltd
Priority to CN201710707675.3A priority Critical patent/CN107288136A/en
Publication of CN107288136A publication Critical patent/CN107288136A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/10Protective 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 soil pressure or hydraulic pressure
    • E02D31/12Protective 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 soil pressure or hydraulic pressure against upward hydraulic pressure

Abstract

The invention provides a kind of building foundation pit safeguard structure and its method, foundation ditch is formed with the outside of the underground structure of the existing building, the foundation pit safeguard structure includes existing building and supporting construction, the existing building includes underground structure, and the underground structure includes exterior wall and the bottom plate located at the underground structure bottom;The supporting construction is crossed in the foundation ditch, the supporting construction includes overturn-preventing and supported and anti-support of floating, one end of the overturn-preventing support is connected by the exterior wall with the underground structure, the other end of the overturn-preventing support is connected on the inwall of the foundation ditch, the anti-branch that floats stays at the overturn-preventing support lower section, described anti-one end for floating support is connected by the exterior wall with the existing building, and the bottom plate is close in bottom, the anti-other end for floating support is connected on the inwall of the foundation ditch.The present invention by setting supporting construction supporting existing building, to existing building topple and floating plays restrictive function.

Description

The structure and its method of building foundation pit protection
Technical field
The present invention relates to technical field of building construction, structure and its side of a kind of building foundation pit protection are related in particular to Method.
Background technology
At present, proposed building underground structure and existing building underground structure feelings closer to the distance occur in Downtown Condition, in order to ensure the safety of surrounding building, building antidumping, sedimentation and anti-floating to foundation ditch periphery require higher.For this Class problem, works out a kind of new means of defence, and the safety of surrounding building is controlled to greatest extent.
The content of the invention
In view of the foregoing, the present invention provides a kind of building foundation pit safeguard structure and its method, by setting overturn-preventing Support is connected with the underground structure of existing building, and restrictive function is played to toppling for existing building;By setting anti-support of floating It is connected with the bottom plate of existing building, and the anti-support connection bored concrete pile that floats, existing building bottom plate and exterior wall formation support, to original The floating of building plays restrictive function.
To achieve the above object, the present invention is adopted the technical scheme that:A kind of building foundation pit safeguard structure is provided, in institute Foundation ditch, including existing building and supporting construction are formed with the outside of the underground structure for stating existing building, the existing building includes ground Lower structure, the underground structure includes exterior wall and the bottom plate located at the underground structure bottom;The supporting construction crosses at institute State in foundation ditch, the supporting construction includes overturn-preventing and supported and anti-support of floating, and one end that the overturn-preventing is supported passes through described Exterior wall is connected with the underground structure, and the other end of overturn-preventing support is connected on the inwall of the foundation ditch, it is described it is anti-on Over draft stays at the overturn-preventing support lower section, and one end of the anti-support of floating is connected by the exterior wall and the existing building Connect, and the bottom plate is close in bottom, the anti-other end for floating support is connected on the inwall of the foundation ditch.
Preferably, anti-float supports lower section to be provided with the anti-floating of connection at the top of some bored concrete piles, the bored concrete pile Support, the bored concrete pile bottom connects soil.
Further, the supporting construction also includes anchor pole, and one end of the anchor pole is plugged between some bored concrete piles Gap in, in the soil of the other end oblique cutting of the anchor pole below the existing building.
A kind of method of building foundation pit protection is provided, the underground structure of existing building includes exterior wall and located at the underground The step of bottom plate of structural base, methods described, includes:
A. foundation ditch is formed on the outside of the underground structure of the existing building, overturn-preventing is supported into the exterior wall by underground structure Bar planting is carried out, and overturn-preventing support is connected with underground structure;
B. continue foundation ditch digging deep, the bottom plate until being deeper than underground structure bottom, and some perfusions are set in bottom of foundation ditch Stake;
C. anti-floating support is subjected to bar planting by the exterior wall of underground structure, and anti-float is supported and underground structure The bottom plate connection of bottom;
D. anchor bolt construction, one end of anchor pole is plugged in the gap between bored concrete pile, and the other end oblique cutting of anchor pole enters underground knot In soil below structure.
It is preferred that the construction procedure of bored concrete pile includes in the step B:
A., some pile top steel pipes are erected in the bottom of the foundation ditch;
B. steel pipe is squeezed into the soil of the bottom of foundation ditch;
C. toward being put into steel reinforcement cage in the steel pipe;
D. the concrete perfusion in tube drawing;
E. stake is made.
Preferably, quantity, spacing, size and the arrangement of reinforcement of the anti-support of floating are confirmed according to calculating.
Preferably, the bored concrete pile and anchor pole carry out calculating confirmation according to engineering characteristic.
Preferably, the underground structure also includes beam-column-slab connection, the overturn-preventing support and anti-support and the institute of floating State beam-column-slab connection connection.
Preferably, it is close to the bottom plate in the bottom that the anti-support of floating connects one end with the exterior wall.
A kind of method of building foundation pit protection is provided, the underground structure of existing building includes exterior wall and located at the underground The bottom plate of structural base, described method and step includes:
A., overturn-preventing bracing members and anti-floating bracing members are provided;
B. overturn-preventing support is installed between the exterior wall and the foundation ditch inwall;
C. there is foundation ditch in digging outside existing building, the bottom plate until being deeper than existing building bottom, and if being set in bottom of foundation ditch Dry bored concrete pile;
D. anti-support of floating is subjected to bar planting by the exterior wall of existing building, and be connected with the bottom plate of existing building bottom;
E. anchor bolt construction, one end of anchor pole is plugged in the gap between bored concrete pile, and the other end oblique cutting of anchor pole enters original build Build in the soil of lower section.
The present invention makes it have following beneficial effect as a result of above technical scheme:
(1) by setting overturn-preventing support to be connected with the underground structure of existing building, system is played to toppling for existing building About act on;By setting anti-support of floating to be connected with the bottom plate of existing building, and anti-support connection bored concrete pile, the existing building of floating Bottom plate and exterior wall formation support, the floating to existing building play restrictive function.
(2) bored concrete pile prevents the soil under existing building bottom plate from being caved in foundation ditch side, serves and goes along with sb. to guard him.
(3) due to deep, the support without centre that last layer of soil is dug, anchor pole can hold soil, to share side Bored concrete pile, in case bored concrete pile is pushed over by soil.
Brief description of the drawings
Fig. 1 is the structure schematic cross-sectional view of the present invention.
Drawing reference numeral explanation:Underground structure 10;Exterior wall 11;Bottom plate 12;Supporting construction 20;Overturn-preventing support 21;It is anti-to float Support 22;Bored concrete pile 23;Anchor pole 24;Foundation ditch 30.
Embodiment
For the benefit of to the understanding of the present invention, illustrated below in conjunction with drawings and Examples.
Referring to Fig. 1, the present invention provides a kind of method of building foundation pit protection, it is original by the supporting of supporting construction 20 Building, methods described has dug foundation ditch 30 on the outside of existing building, and supporting construction 20 is crossed in foundation ditch 30, supporting construction 20 One end connect the existing building, the other end is connected with the inwall of the foundation ditch 30.
As shown in figure 1, the existing building includes underground structure 10, underground structure 10 includes exterior wall 11 and located at underground knot The bottom plate 12 of the bottom of structure 10.
The supporting construction 20 include overturn-preventing support 21 and it is anti-float support 22, overturn-preventing support 21 one end pass through it is outer Wall 11 is connected with underground structure 10, and the other end of overturn-preventing support 21 is connected on the inwall of foundation ditch 30, and existing building is inclined Cover and play restrictive function.Anti- support 22 of floating is located at the lower section of overturn-preventing support 21, and anti-one end for floating support 22 passes through exterior wall 11 Be connected with the existing building, and bottom plate 12 is close in bottom, it is anti-to float support 22 as far as possible and the increase lifting surface area of bottom plate 12, prevent on The other end of over draft support 22 is connected on the inwall of foundation ditch 30.
In the preferred embodiment of the present invention, overturn-preventing support 21 and anti-support 22 of floating are all concrete support, But this is not limited to, overturn-preventing support 22 can be also bracing members, can be adjusted according to practice of construction demand.
In the preferred embodiment of the present invention, the quantity of overturn-preventing support 21 is two, but is not limited to this, can root It is adjusted according to practice of construction demand.
Preferably, anti-22 lower ends of support of floating set some bored concrete piles 23, the anti-support of floating of the top of bored concrete pile 23 connection 22, the bottom of bored concrete pile 23 connection soil, bored concrete pile 23 prevents the soil under the bottom plate 12 of existing building from being caved in the side of foundation ditch 30, rises and enclose Shield is acted on.
It is preferred that oblique cutting has anchor pole 24 in gap between the bored concrete pile 23, the one end of anchor pole 24 is plugged in bored concrete pile 23 Between gap in, in soil of the other end oblique cutting below the existing building.Due to last layer soil dig it is deep, do not have Middle support, anchor pole 24 can hold soil, to share the bored concrete pile 23 of side, in case bored concrete pile 23 is pushed over by soil.
Include in a preferred embodiment of the present invention, the step of building foundation pit method for protecting support of the present invention:
A. being dug in the outside of underground structure 10 of the existing building has foundation ditch 30, and overturn-preventing support 21 is passed through into underground structure 10 exterior wall 11 carries out bar planting, and overturn-preventing support 21 is connected with underground structure 10;
B. continue foundation ditch 30 digging depth, the bottom plate 12 until being deeper than the bottom of underground structure 10, and set in the bottom of foundation ditch 30 Some bored concrete piles 23;
C. support 22 to carry out bar planting by the exterior wall 11 of underground structure 10 anti-float, and anti-float is supported into 22 and underground The bottom plate 12 of the bottom of structure 10 is connected;
D. anchor pole 24 is constructed, and one end of anchor pole 24 is plugged in the gap between bored concrete pile 23, the other end oblique cutting of anchor pole 24 In the soil for entering the lower section of underground structure 10.
Further, the method for the building foundation pit protection also includes the construction method of bored concrete pile 23, bored concrete pile 23 Construction procedure includes:
A., some pile top steel pipes are erected in the bottom of the foundation ditch;
B. steel pipe is squeezed into the soil of the bottom of foundation ditch;
C. toward being put into steel reinforcement cage in the steel pipe;
D. the concrete perfusion in tube drawing;
E. stake is made.
In the preferred embodiment of the present invention, the overturn-preventing support 21 can be tied with the ground of the existing building Structure is connected, but is not limited to this, can be adjusted according to practice of construction situation.
The present invention is described in detail above in association with drawings and Examples, those skilled in the art can basis Described above makes many variations example to the present invention.Thus, some of embodiment details should not constitute limitation of the invention, The present invention regard the scope defined using appended claims as protection scope of the present invention.

Claims (10)

1. a kind of building foundation pit safeguard structure, it is characterised in that including:
Existing building, the existing building includes underground structure, and the underground structure includes exterior wall and located at the underground structure The bottom plate of bottom;
Supporting construction, the supporting construction is crossed in the foundation ditch, and the supporting construction includes overturn-preventing and supported and anti-floating Support, one end of the overturn-preventing support is connected by the exterior wall with the underground structure, and it is another that the overturn-preventing is supported End is connected on the inwall of the foundation ditch, and the anti-branch that floats stays at the overturn-preventing support lower section, the anti-support of floating One end be connected by the exterior wall with the existing building, and the bottom plate is close in bottom, described anti-the another of support that float End is connected on the inwall of the foundation ditch.
2. building foundation pit protection mechanism according to claim 1, it is characterised in that the anti-support lower section of floating is provided with The connection anti-support of floating at the top of some bored concrete piles, the bored concrete pile, the bored concrete pile bottom connects soil.
3. building foundation pit protection mechanism according to claim 2, it is characterised in that the supporting construction also includes anchor Bar, one end of the anchor pole is plugged in the gap between some bored concrete piles, and the other end oblique cutting of the anchor pole is in the original Have in the soil below building.
4. a kind of method of building foundation pit protection, the underground structure of existing building includes exterior wall and located at the underground structure bottom The bottom plate in portion, it is characterised in that include the step of methods described:
A. foundation ditch is formed on the outside of the underground structure of the existing building, overturn-preventing is supported and carried out by the exterior wall of underground structure Bar planting, and overturn-preventing support is connected with underground structure;
B. continue foundation ditch digging deep, the bottom plate until being deeper than underground structure bottom, and some bored concrete piles are set in bottom of foundation ditch;
C. anti-floating support is subjected to bar planting by the exterior wall of underground structure, and anti-float is supported and underground structure bottom Bottom plate connection;
D. anchor bolt construction, one end of anchor pole is plugged in the gap between bored concrete pile, and the other end oblique cutting of anchor pole enters under underground structure In the soil of side.
5. the construction procedure bag of bored concrete pile in the method for building foundation pit protection according to claim 4, the step B Include:
A., some pile top steel pipes are erected in the bottom of the foundation ditch;
B. steel pipe is squeezed into the soil of the bottom of foundation ditch;
C. toward being put into steel reinforcement cage in the steel pipe;
D. the concrete perfusion in tube drawing;
E. stake is made.
6. the method for building foundation pit protection according to claim 4, it is characterised in that the number of the anti-support of floating Amount, spacing, size and arrangement of reinforcement are confirmed according to calculating.
7. the method for building foundation pit according to claim 4 protection, it is characterised in that the bored concrete pile and anchor pole according to Engineering characteristic carries out calculating confirmation.
8. the method for building foundation pit protection according to claim 4, it is characterised in that the underground structure also includes Beam-column-slab connection, the overturn-preventing support and anti-support of floating are connected with the beam-column-slab connection.
9. the method for building foundation pit according to claim 4 protection, it is characterised in that it is described it is anti-float support with it is described It is close to the bottom plate in the bottom that exterior wall connects one end.
10. a kind of method of building foundation pit protection, the underground structure of existing building includes exterior wall and located at the underground structure The bottom plate of bottom, it is characterised in that described method and step includes:
A., overturn-preventing bracing members and anti-floating bracing members are provided;
B. overturn-preventing support is installed between the exterior wall and the foundation ditch inwall;
C. there is foundation ditch in digging outside existing building, the bottom plate until being deeper than existing building bottom, and some fill is set in bottom of foundation ditch Note stake;
D. anti-support of floating is subjected to bar planting by the exterior wall of existing building, and be connected with the bottom plate of existing building bottom;
E. anchor bolt construction, one end of anchor pole is plugged in the gap between bored concrete pile, and the other end oblique cutting of anchor pole enters under existing building In the soil of side.
CN201710707675.3A 2017-08-17 2017-08-17 The structure and its method of building foundation pit protection Pending CN107288136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710707675.3A CN107288136A (en) 2017-08-17 2017-08-17 The structure and its method of building foundation pit protection

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Application Number Priority Date Filing Date Title
CN201710707675.3A CN107288136A (en) 2017-08-17 2017-08-17 The structure and its method of building foundation pit protection

Publications (1)

Publication Number Publication Date
CN107288136A true CN107288136A (en) 2017-10-24

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000240077A (en) * 1999-02-23 2000-09-05 Ohbayashi Corp Demolishing method for underground structure
CN101736737A (en) * 2009-12-28 2010-06-16 武汉华威建筑桩工机械有限责任公司 Process and equipment for constructing pouring file whose hole is formed by internally striking and externally pressing steel pipe
CN103590404A (en) * 2012-08-13 2014-02-19 上海市政工程设计研究总院(集团)有限公司 Method for supporting foundation pit next to established underground structure
CN105625479A (en) * 2016-03-03 2016-06-01 上海市政工程设计研究总院(集团)有限公司 Anti-buoyancy structure of existing tunnel
CN106592606A (en) * 2017-01-19 2017-04-26 中铁开发投资有限公司 Foundation pit support construction method suitable for three-free-face building envelope
CN106759376A (en) * 2016-12-21 2017-05-31 大连交通大学 Anchored Sheet Pile Wall for Excavation system and its construction method for closing on existing underground structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000240077A (en) * 1999-02-23 2000-09-05 Ohbayashi Corp Demolishing method for underground structure
CN101736737A (en) * 2009-12-28 2010-06-16 武汉华威建筑桩工机械有限责任公司 Process and equipment for constructing pouring file whose hole is formed by internally striking and externally pressing steel pipe
CN103590404A (en) * 2012-08-13 2014-02-19 上海市政工程设计研究总院(集团)有限公司 Method for supporting foundation pit next to established underground structure
CN105625479A (en) * 2016-03-03 2016-06-01 上海市政工程设计研究总院(集团)有限公司 Anti-buoyancy structure of existing tunnel
CN106759376A (en) * 2016-12-21 2017-05-31 大连交通大学 Anchored Sheet Pile Wall for Excavation system and its construction method for closing on existing underground structure
CN106592606A (en) * 2017-01-19 2017-04-26 中铁开发投资有限公司 Foundation pit support construction method suitable for three-free-face building envelope

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Application publication date: 20171024