CN108086367A - Prevent and reduce natural disasters structure and its construction method of nearly tomography multi-column pier foundation - Google Patents
Prevent and reduce natural disasters structure and its construction method of nearly tomography multi-column pier foundation Download PDFInfo
- Publication number
- CN108086367A CN108086367A CN201810015839.0A CN201810015839A CN108086367A CN 108086367 A CN108086367 A CN 108086367A CN 201810015839 A CN201810015839 A CN 201810015839A CN 108086367 A CN108086367 A CN 108086367A
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- pier foundation
- column pier
- divider wall
- cement mixing
- fine sand
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective 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 transmission of vibrations or movements in the foundation soil
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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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)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention provides the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation, including multi-column pier foundation, the double divider wall being made of cement mixing pile, soil layer anchor cable and fine sand band.The multi-column pier foundation is located in the overlying soil body of footwall, and deformation failure threatens easily caused by by faulting；The double divider wall is located between multi-column pier foundation and movable dip fault, and adjacent cement mixing pile close-packed arrays are simultaneously inserted into tomography overlying soil body certain depth；The soil layer anchor cable is passed through between multi-column pier foundation, and one end is squeezed into steady soil, and the other end is anchored on the cement mixing pile of the divider wall of multi-column pier foundation one side；The fine sand band is used to replace the soil body between double divider wall.Said structure, which can be directed to, to be located near movable dip fault, and effective disaster-proof measures are taken using the existing building of multi-column pier foundation.
Description
Technical field
The present invention relates to the hazard mitigation measures of the nearly tomography of multi-column pier foundation, and in particular to it is a kind of for nearly tomography multi-column pier foundation by
The double divider wall disaster-proof measures and implementation of cement mixing pile composition.
Background technology
Fault movement may cause the basement rock overlying soil body to rupture during earthquake, cause Surface rupture nearby buildings pile foundation
There is rupture failure, for multi-column pier foundation near active fault, the hazard mitigation measure being lack of pertinence at present, the research of this problem
It is paid special attention to be subject to people.How by rational isolation technology, the soil deformation development of barrier overlying reduces faulting pair
Destruction caused by building multi-column pier foundation can become the important research direction that nearly tomography is prevented and reduced natural disasters.
The content of the invention
Technical problem underlying to be solved by this invention is to provide the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation, for position
Near movable dip fault, effective disaster-proof measures are taken for existing building, it is broken in faulting to mitigate it
It is bad.
To achieve the above object, the present invention provides, the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation, including：Clump of piles base
Plinth, the double divider wall being made of cement mixing pile, soil layer anchor cable and fine sand band；
The multi-column pier foundation is located in the overlying soil body of footwall；Double divider wall is located at multi-column pier foundation and is inclined to activity
Adjacent cement mixing pile close-packed arrays and tomography overlying soil body certain depth is inserted between tomography, in each row's divider wall；Institute
It states soil layer anchor cable to pass through between multi-column pier foundation, one end is squeezed into steady soil, and the other end is anchored in close to multi-column pier foundation one side
On each cement mixing pile of divider wall；The fine sand band is used to replace the soil body between double divider wall；
When the movable dip fault is normal fault, the double divider wall and fine sand band are to hanging wall one side
Mobile, soil layer anchor cable tension prevents the cement mixing pile divider wall close to one row of multi-column pier foundation from generating excessive horizontal displacement；
When the movable dip fault is reversed fault, the double divider wall and fine sand band are to footwall one side
Mobile, the fine sand band absorbs a certain amount of crimp, and the divider wall generation for avoiding a row of close multi-column pier foundation is excessive
Horizontal displacement protects the overall stability of the soil body near multi-column pier foundation.
In a preferred embodiment：The co-hade of the activity dip fault is α, and fault movement vertical component is h, is broken
Layer overlying soil body thickness is H；
The pile body length of the multi-column pier foundation be LP1, stake footpath be d1, stake spacing be SP1, cushion cap length and width be respectively L1 and
B1, horizontal distance of the multi-column pier foundation away from the movable dip fault is S1；
The pile body length of the cement mixing pile is LP2, and stake footpath is d2, and the spacing of adjacent cement mixing pile is SP2, institute
The arrangement overall length for stating divider wall is L2；Horizontal distance of the center line of the divider wall away from the movable dip fault is S2；
The S2 takes the smaller value between S1/2 and H/ (2tan α)；The cement mixing stake body building-in depth is not less than stake
Long 1/3rd；The building-in depth is inserted into the depth of tomography overlying soil body Fracture Development In Compressed Marble Specimen line lower stable soil layer for pile body
Degree, i.e. LP2- (H-S2 × tan α) >=1/3LP2.
In a preferred embodiment：If the cement mixing stake body building-in depth is less than long 1/3rd of stake, water
Mud stirring stake body need to be embedded in basement rock.
In a preferred embodiment：The arrangement total length L 2 of the divider wall is not less than 1.5 times of multi-column pier foundation cushion cap length；
The stake interval S P2 of adjacent cement mixing pile is not more than 0.5 times of stake footpath d2；
In a preferred embodiment：The fine sand bandwidth is b, depth HS；The width b of fine sand band is not less than 2 times of stakes
Footpath d2.
In a preferred embodiment：The depth H S of fine sand band is not more than 2/3rds of the long LP2 of stake.
The present invention also provides the construction method of the structure of preventing and reducing natural disasters of above-mentioned nearly tomography multi-column pier foundation, including walking as follows
Suddenly：
1) according to the condition of movable dip fault, movable dip fault and the relative position of multi-column pier foundation and tomography overlying
Soil body thickness determines the construction location of double divider wall, calculates the pile body length of cement mixing pile, and considers whether to need to be embedded in
Basement rock；
2) construct in order in designated position double divider wall, when construction strictly controls pile body length, adjacent cement mixing
The width of the spacing of stake and intermediate reserved fine sand band；
3) treat that cement mixing pile reaches some strength, utilize it as side wall supporting construction, if intermediate soil layer band is divided into
Dry section stays a part of soil not dig as supporting and retaining system between section and section, excavate the last period soil layer and change fill out to carry out again after fine sand it is next
Section soil-layer displacement, until the intermediate soil body is all replaced as fine sand；
4) construction soil layer anchor cable：Anchor cable is passed through between multi-column pier foundation, and one end is squeezed into steady soil, and the other end, which is anchored in, to be leaned on
On each cement mixing pile of nearly multi-column pier foundation one side divider wall, ensure that every cement mixing pile is fully anchored.
Compared to the prior art, technical scheme possesses following advantageous effect：
The present invention provides the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation, including multi-column pier foundation, by cement mixing pile group
Into double divider wall, soil layer anchor cable and fine sand band.The multi-column pier foundation is located in the overlying soil body of basement rock footwall, easily by
Deformation failure caused by faulting threatens；The double divider wall is located between multi-column pier foundation and movable dip fault, adjacent
Cement mixing pile close-packed arrays are simultaneously inserted into tomography overlying soil body certain depth；The soil layer anchor cable is passed through between multi-column pier foundation, and one
End is squeezed into steady soil, and the other end is anchored on the cement mixing pile of the divider wall of multi-column pier foundation one side；The fine sand
Band is used to replace the soil body between double divider wall.Said structure, which can be directed to, to be located near movable dip fault, using multi-column pier foundation
Existing building take effective disaster-proof measures.
Description of the drawings
Fig. 1 is the double divider wall sectional elevation schematic diagram under normal fault；
Fig. 2 is the double divider wall sectional elevation schematic diagram under reversed fault；
Fig. 3 is double divider wall horizontal plane schematic diagram.
In figure：1 is multi-column pier foundation, and 11 be pile body, and 12 cushion caps, 2 be divider wall, and 21 be divider wall, and 22 be soil layer anchor cable,
23 be fine sand band, and 31 be movable dip fault, and 311 be co-hade, and 312 be fault movement vertical component, and 313 be tomography overlying
The soil body zone of fracture, 32 be footwall, and 33 be hanging wall, and 34 be the tomography overlying soil body.
Specific embodiment
Below in conjunction with attached drawing, the present invention is further described.
The method applied in the present invention, which can be directed to, to be located near movable dip fault, is taken using the existing building of pile foundation
Effective disaster-proof measures, to reduce its destruction in faulting.
As shown in Figure 1, Figure 2, Figure 3 shows, the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation 1, including：Multi-column pier foundation 1, by cement
The double divider wall 2 of mixing pile composition, soil layer anchor cable 22 and fine sand band 23；
The multi-column pier foundation 1 is located in the tomography overlying soil body 34；Double divider wall 2 is located at multi-column pier foundation 1 and is inclined to activity
Adjacent cement mixing pile close-packed arrays and 34 1 depthkeeping of the tomography overlying soil body is inserted between tomography 31, in each row's divider wall 2
Degree；The soil layer anchor cable 22 is passed through between multi-column pier foundation 1, and one end is squeezed into steady soil, and the other end is anchored in close to clump of piles base
On each cement mixing pile of the divider wall 2 of 1 one side of plinth；The fine sand band 23 is used to replace the soil body between double divider wall 2；
When the movable dip fault 31 is normal fault, the double divider wall 2 and fine sand band 23 are on tomography
Disk one side is moved, 22 tension of soil layer anchor cable, and the cement mixing pile divider wall 2 prevented close to 1 one row of multi-column pier foundation generates excessive
Horizontal displacement；
When the movable dip fault 31 is reversed fault, the double divider wall 2 and fine sand band 23 are under tomography
Disk one side is moved, and the fine sand band 23 absorbs a certain amount of crimp, avoids the divider wall 2 of the row close to multi-column pier foundation 1
Excessive horizontal displacement is generated, protects the overall stability of the soil body near multi-column pier foundation 1.
Specifically, the co-hade of the movable dip fault 31 is α, and fault movement vertical component is h, tomography overlying
34 thickness of the soil body is H；
The pile body length of the multi-column pier foundation 1 be LP1, stake footpath be d1, stake spacing be SP1, cushion cap length and width be respectively L1 and
B1, horizontal distance of the multi-column pier foundation 1 away from the movable dip fault 31 is S1；
The pile body length of the cement mixing pile is LP2, and stake footpath is d2, and the spacing of adjacent cement mixing pile is SP2, institute
The arrangement overall length for stating divider wall 2 is L2；Horizontal distance of the center line of the divider wall 2 away from the movable dip fault 31 be
S2；
The S2 takes the smaller value between S1/2 and H/ (2tan α)；The cement mixing stake body building-in depth is not less than stake
Long 1/3rd；The building-in depth is inserted into the depth of 34 Fracture Development In Compressed Marble Specimen line lower stable soil layer of the tomography overlying soil body for pile body
Degree, i.e. LP2- (H-S2 × tan α) >=1/3LP2.
It being limited if as construction environment, the cement mixing stake body building-in depth is less than long 1/3rd of stake,
Then cement mixing stake body need to be embedded in basement rock.
The arrangement total length L 2 of the divider wall 2 is not less than 1.5 times of 1 cushion cap length of multi-column pier foundation；Adjacent cement mixing pile
Stake interval S P2 be not more than 0.5 times of stake footpath d2；
23 width of fine sand band is b, depth HS；The width b of fine sand band 23 is not less than 2 times of stake footpath d2.Fine sand band 23
Depth H S be not more than the long LP2 of stake 2/3rds.
The construction method of the structure of preventing and reducing natural disasters of above-mentioned nearly tomography multi-column pier foundation 1, includes the following steps：
1) according to the condition of movable dip fault 31, relative position and work of the movable dip fault 31 with multi-column pier foundation 1
The 31 overlying soil body of dynamic dip fault, 34 thickness determines the construction location of double divider wall 2, calculates the pile body length of cement mixing pile,
And it considers whether to need embedded basement rock；
2) construct in order in designated position double divider wall 2, when construction strictly controls pile body length, adjacent cement mixing
The width of the spacing of stake and intermediate reserved fine sand band 23；
3) treat that cement mixing pile reaches some strength, utilize it as side wall supporting construction, if intermediate soil layer band is divided into
Dry section stays a part of soil not dig as supporting and retaining system between section and section, excavate the last period soil layer and change fill out to carry out again after fine sand it is next
Section soil-layer displacement, until the intermediate soil body is all replaced as fine sand；
4) construction soil layer anchor cable 22：Anchor cable is passed through between multi-column pier foundation, and one end is squeezed into steady soil, and the other end is anchored in
On each cement mixing pile of 1 one side divider wall 2 of multi-column pier foundation, ensure that every cement mixing pile is fully anchored.
The foregoing is merely present pre-ferred embodiments, therefore the technical scope of the present invention cannot be limited according to this, therefore Fan Yiben
The equivalent changes and modifications that the technical spirit and description of invention are made, in the range of should all belonging to technical solution of the present invention.
Claims (7)
1. the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation, it is characterised in that including：Multi-column pier foundation is made of cement mixing pile
Double divider wall, soil layer anchor cable and fine sand band；
The multi-column pier foundation is located in the overlying soil body of footwall；Double divider wall is located at multi-column pier foundation and movable dip fault
Between, adjacent cement mixing pile close-packed arrays and it is inserted into tomography overlying soil body certain depth in each row's divider wall；The soil
Layer anchor cable is passed through between multi-column pier foundation, and one end is squeezed into steady soil, and the other end is anchored in the isolation close to multi-column pier foundation one side
On each cement mixing pile of wall；The fine sand band is used to replace the soil body between double divider wall；
When the movable dip fault is normal fault, the double divider wall and fine sand band are to one sidesway of hanging wall
Dynamic, soil layer anchor cable tension prevents the cement mixing pile divider wall close to one row of multi-column pier foundation from generating excessive horizontal displacement；
When the movable dip fault is reversed fault, the double divider wall and fine sand band are to one sidesway of footwall
Dynamic, the fine sand band absorbs a certain amount of crimp, and the divider wall of the row close to multi-column pier foundation is avoided to generate excessive water
Prosposition moves, and protects the overall stability of the soil body near multi-column pier foundation.
2. the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation according to claim 1, it is characterised in that：The activity tendency
The co-hade of tomography is α, and fault movement vertical component is h, and tomography overlying soil body thickness is H；
The pile body length of the multi-column pier foundation is LP1, and stake footpath is d1, and stake spacing is SP1, and cushion cap length and width are respectively L1 and B1, institute
It is S1 to state horizontal distance of the multi-column pier foundation away from the movable dip fault；
The pile body length of the cement mixing pile is LP2, and stake footpath is d2, and the spacing of adjacent cement mixing pile is SP2, the isolation
The arrangement overall length of wall is L2；Horizontal distance of the center line of the divider wall away from the movable dip fault is S2；
The S2 takes the smaller value between S1/2 and H/ (2tan α)；The cement mixing stake body building-in depth is long not less than stake
1/3rd；The building-in depth is inserted into the depth of tomography overlying soil body Fracture Development In Compressed Marble Specimen line lower stable soil layer for pile body, i.e.,
LP2-(H-S2×tanα)≥1/3LP2。
3. the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation according to claim 2, it is characterised in that：If the cement stirs
It mixes stake body building-in depth and is less than long 1/3rd of stake, then cement mixing stake body need to be embedded in basement rock.
4. the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation according to claim 3, it is characterised in that：The divider wall
It arranges total length L 2 and is not less than 1.5 times of multi-column pier foundation cushion cap length；The stake interval S P2 of adjacent cement mixing pile is not more than 0.5 times
Stake footpath d2.
5. the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation according to claim 4, it is characterised in that：The fine sand bandwidth
It spends for b, depth HS；The width b of fine sand band is not less than 2 times of stake footpath d2.
6. the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation according to claim 5, it is characterised in that：The depth of fine sand band
HS is not more than 2/3rds of the long LP2 of stake.
7. the construction method of the structure of preventing and reducing natural disasters of nearly tomography multi-column pier foundation according to claim 6, it is characterised in that bag
Include following steps：
1) according to the condition of movable dip fault, movable dip fault and the relative position of multi-column pier foundation and the tomography overlying soil body
Thickness determines the construction location of double divider wall, calculates the pile body length of cement mixing pile, and considers whether to need embedded basement rock；
2) construct in order in designated position double divider wall, when construction strictly controls pile body length, adjacent cement mixing pile
The width of spacing and intermediate reserved fine sand band；
3) treat that cement mixing pile reaches some strength, utilize it as side wall supporting construction, intermediate soil layer band is divided into several sections,
A part of soil is stayed not dig as supporting and retaining system between section and section, the last period soil layer is excavated and changes and fill out to carry out next section of soil layer after fine sand again
Displacement, until the intermediate soil body is all replaced as fine sand；
4) construction soil layer anchor cable：Anchor cable is passed through between multi-column pier foundation, and one end is squeezed into steady soil, and the other end is anchored in close to group
On each cement mixing pile of pile foundation one side divider wall, ensure that every cement mixing pile is fully anchored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015839.0A CN108086367B (en) | 2018-01-08 | 2018-01-08 | Disaster prevention and reduction structure of near-fault pile group foundation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015839.0A CN108086367B (en) | 2018-01-08 | 2018-01-08 | Disaster prevention and reduction structure of near-fault pile group foundation and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108086367A true CN108086367A (en) | 2018-05-29 |
| CN108086367B CN108086367B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810015839.0A Active CN108086367B (en) | 2018-01-08 | 2018-01-08 | Disaster prevention and reduction structure of near-fault pile group foundation and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792095A (en) * | 2019-11-11 | 2020-02-14 | 山东建筑大学 | Multi-pile bearing platform-spiral anchor composite foundation |
| CN111270709A (en) * | 2020-02-11 | 2020-06-12 | 四川省交通运输发展战略和规划科学研究院 | Energy absorption device for protecting building safety in reverse fault |
| CN115075306A (en) * | 2022-07-05 | 2022-09-20 | 四川省交通运输发展战略和规划科学研究院 | Partition wall structure for protecting building safety in normal fault and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110792095A (en) * | 2019-11-11 | 2020-02-14 | 山东建筑大学 | Multi-pile bearing platform-spiral anchor composite foundation |
| CN111270709A (en) * | 2020-02-11 | 2020-06-12 | 四川省交通运输发展战略和规划科学研究院 | Energy absorption device for protecting building safety in reverse fault |
| CN111270709B (en) * | 2020-02-11 | 2021-07-20 | 四川省交通运输发展战略和规划科学研究院 | Energy absorption device for protecting building safety in reverse fault |
| CN115075306A (en) * | 2022-07-05 | 2022-09-20 | 四川省交通运输发展战略和规划科学研究院 | Partition wall structure for protecting building safety in normal fault and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN108086367B (en) | 2023-07-28 |
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