CN109440774A - A kind of foundation pit structure and its construction method - Google Patents
A kind of foundation pit structure and its construction method Download PDFInfo
- Publication number
- CN109440774A CN109440774A CN201811607660.0A CN201811607660A CN109440774A CN 109440774 A CN109440774 A CN 109440774A CN 201811607660 A CN201811607660 A CN 201811607660A CN 109440774 A CN109440774 A CN 109440774A
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- shallow
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- hole
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
In order to solve the problem on deformation of complicated foundation pit, the present invention provides a kind of foundation pit structure and its construction method.A kind of foundation pit structure is cheated including shallow foundation and excavates in the deep basal pit of shallow bottom of foundation ditch, and the bottom in the shallow foundation hole is laid with reinforcement cushion, is laid with bottom plate on the reinforcement cushion, the reinforcement cushion of the deep basal pit two sides is connected by power transmission stiffening plate.Foundation pit structure of the invention, reinforcement cushion is laid under bottom plate, and the reinforcement cushion of deep basal pit two sides is linked together by power transmission stiffening plate, complete structural system is formed with the building enclosure in the outside in shallow foundation hole, to reduce the deformation of foundation pit, the deformation that intensity after dell concrete support does not construct or constructs is not up to foundation pit in the desired period is especially reduced.
Description
Technical field
The invention belongs to foundation pit construction technical field, in particular to a kind of foundation pit structure and its construction method.
Background technique
Along with the continuous construction of base pit engineering, construction experience and blending for theoretical knowledge have further pushed foundation pit to enclose
The development of shield technology and construction technology.At the same time, the structure of foundation pit also becomes increasingly complex.
When the structure of foundation pit is the form cheated in hole, need first to carry out shallow hole construction.Bottom slab concreting is being carried out to shallow hole
When, due to needing reserved dell excavation face to lead to shallow hole bottom plate not it is thus impossible to pour shallow hole bottom plate in dell excavation face
Complete structural system can be formed with the building enclosure in outside, so as to cause the deformation of foundation pit.Although can be by being opened in dell
Dell is arranged in digging face to support to improve the structural system of shallow hole, but pouring of supporting of shallow hole bottom plate and dell require it is longer
Time not can guarantee in this period, and foundation pit does not deform.
Summary of the invention
In order to solve the problem on deformation of complicated foundation pit, the present invention provides a kind of foundation pit structure and its construction method.
The technical solution of foundation pit structure of the invention is as follows:
A kind of foundation pit structure is cheated and is excavated including shallow foundation in the deep basal pit of shallow bottom of foundation ditch, the bottom in the shallow foundation hole
It is laid with reinforcement cushion, is laid with bottom plate on the reinforcement cushion, the reinforcement cushion of the deep basal pit two sides is connected by power transmission stiffening plate
It connects.
Foundation pit structure of the invention is laid with reinforcement cushion under bottom plate, and passes through power transmission stiffening plate for deep basal pit two sides
Reinforcement cushion links together, and complete structural system is formed with the building enclosure in the outside in shallow foundation hole, to reduce foundation pit
Deformation, especially reduce intensity after dell concrete support does not construct or constructs and be not up to foundation pit in the desired period
Deformation.
Further, in the foundation pit structure, specifically, shallow hole building enclosure is set around shallow foundation hole, it is described
Dell building enclosure is set around deep basal pit, shallow hole concrete support, the depth base are set between the two sides in the shallow foundation hole
It cheats and dell concrete support is set between the bottom plate of two sides.
Further, it in the foundation pit structure, is supportted between the end and reinforcement cushion of the power transmission stiffening plate by eight words
Connection.Reinforcement cushion and power transmission stiffening plate are connected by the support of eight words can play better power transmission effect, be further formed complete
Foundation pit structure system, to reduce the deformation of foundation pit.
Further, in the foundation pit structure, the dell concrete support is respectively arranged at the top of power transmission stiffening plate.
In this way, power transmission stiffening plate can be with when carrying out the construction of dell concrete support after reinforcement cushion and the construction of power transmission stiffening plate
As the work surface of dell concrete support, to reduce the difficulty of construction of dell concrete support.
It further, further include anchor bar to reinforce foundation pit structure in the foundation pit structure, the anchor bar
Perpendicular to bottom plate, it is vertical with the reinforcing bar of bottom plate side exposing in the middle part of the anchor bar to connect, and pour in dell concrete
In support, the upper end of the anchor bar passes through bottom plate, and the lower end of the anchor bar passes through the gap of eight words support.In addition, anchor
Gu the reserved of the top and bottom of reinforcing bar also provides condition for the construction of subsequent deep basal pit side wall.
It further, further include side wall reserved steel bar for the ease of the construction of deep basal pit side wall in the foundation pit structure,
The side wall reserved steel bar perpendicular to bottom plate, and pour in dell concrete support, the upper end of the side wall reserved steel bar
Across bottom plate, the lower end of the side wall reserved steel bar passes through the gap of eight words support.
Of the invention also provides a kind of construction method of above-mentioned foundation pit structure.
The technical solution of the construction method of foundation pit structure of the invention is as follows, includes the following steps:
The first step carries out the construction of shallow hole building enclosure and dell building enclosure；
Shallow hole concrete support is arranged in second step between the two sides of shallow hole building enclosure；
Third step excavates shallow foundation hole；
4th step, after shallow bottom of foundation ditch reserves deep pit digging position, in shallow foundation hole, bottom pours reinforcement cushion；
5th step is connected the reinforcement cushion of the two sides of deep basal pit reserved location by power transmission stiffening plate, power transmission stiffening plate
End and reinforcement cushion between by eight words support connect；
6th step, pours bottom plate on reinforcement cushion；
7th step is connect vertical with the bottom plate side reinforcing bar exposed in the middle part of anchor bar, and the lower end of anchor bar passes through
The gap of eight words support；
Side wall reserved steel bar is set to anchor bar side by the 8th step, and the lower end of side wall reserved steel bar is supportted across eight words
Gap；
Dell concrete support, anchor bar and side is arranged in 9th step between the bottom plate of deep basal pit reserved location two sides
Wall reserved steel bar pours in dell concrete support, and the upper end of anchor bar and side wall reserved steel bar passes through bottom plate；
Tenth step, deep pit excavation.
The construction method of foundation pit structure of the invention is laid with reinforcement cushion under bottom plate, and will be deep by power transmission stiffening plate
The reinforcement cushion of foundation pit two sides links together, and forms complete structural system with the building enclosure in the outside in shallow foundation hole, thus
The deformation of foundation pit is reduced, intensity after dell concrete support does not construct or constructs especially is reduced and is not up to the desired time
The deformation of foundation pit in section.
It is provided in addition, the setting of power transmission stiffening plate also anchors into dell concrete support with side wall reserved steel bar for anchor bar
Time and space, so that the construction of the deep basal pit side wall for after provides condition, and when making structure construction, dell is mixed
Solidifying soil support does not have to be removed, and can continue the deformation for playing the role of keeping out foundation pit.
Further, in the construction method of the foundation pit structure, specifically, further include the 11st step, by anchor bar with
The both ends of side wall reserved steel bar are connect with the reinforcing bar of deep basal pit side wall respectively, and carry out pouring for deep basal pit side wall.
Further, in the construction method of the foundation pit structure, in order to reinforce the ability for the resistance to deformation that shallow foundation is cheated, third step
In, while excavating shallow foundation hole, shallow hole is set below shallow hole concrete support and reinforces support.
Further, in the construction method of the foundation pit structure, for the ease of constructing, in the tenth step, in deep pit excavation
Before, remove the support of eight words and power transmission stiffening plate.
Detailed description of the invention
Fig. 1 is the schematic diagram of foundation pit structure of the invention；
Fig. 2 is the A-A sectional view of Fig. 1 of foundation pit structure of the invention；
Fig. 3 is the B-B sectional view of Fig. 1 of foundation pit structure of the invention；
Fig. 4 is the construction schematic diagram of foundation pit structure construction method of the invention；
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.According to following explanation, the present invention
The advantages of and feature will become apparent from.It should be noted that attached drawing is all made of very simplified form and uses non-accurate ratio,
Only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Embodiment 1:
Referring to figs. 1 to Fig. 4, a kind of foundation pit structure provided in this embodiment, including shallow foundation hole 8 and excavation cheat 8 in shallow foundation
The deep basal pit 9 of bottom, the bottom in the shallow foundation hole 8 are laid with reinforcement cushion 3, are laid with bottom plate 6, the depth on the reinforcement cushion 3
The reinforcement cushion 3 of 9 two sides of foundation pit is connected by power transmission stiffening plate 4.
The foundation pit structure of the present embodiment is laid with reinforcement cushion 3 under bottom plate 6, and passes through power transmission stiffening plate 4 for deep basal pit 9
The reinforcement cushion 3 of two sides links together, and complete structural system is formed with the building enclosure in the outside in shallow foundation hole 8, to subtract
The small deformation of foundation pit especially reduces intensity after dell concrete support 7 does not construct or constructs and is not up to the desired time
The deformation of foundation pit in section.
As preferable embodiment, in the foundation pit structure, specifically, setting shallow hole encloses around shallow foundation hole 8
Dell building enclosure 2 is arranged around the deep basal pit 9, shallow hole coagulation is arranged between the two sides in the shallow foundation hole 8 for protection structure 1
Soil supports 10, and dell concrete support 7 is arranged between the bottom plate 6 of 9 two sides of deep basal pit.
As preferable embodiment, in the foundation pit structure, the end of the power transmission stiffening plate 4 and reinforcement cushion 3 it
Between by eight words support 5 connection.Reinforcement cushion 3, which is connect with power transmission stiffening plate 4 by eight words support 5, can play better power transmission effect,
It is further formed complete foundation pit structure system, to reduce the deformation of foundation pit.
As preferable embodiment, in the foundation pit structure, the dell concrete support 7 is respectively arranged at power transmission and adds
The top of strong plate 4.In this way, when carrying out the construction of dell concrete support 7 after reinforcement cushion 3 and power transmission stiffening plate 4 are constructed,
Power transmission stiffening plate 4 can be used as the work surface of dell concrete support 7, to reduce the difficulty of construction of dell concrete support 7.
It further include anchor bar 12 to reinforce foundation pit structure in the foundation pit structure as preferable embodiment,
The anchor bar 12 perpendicular to bottom plate 6,12 middle part of the anchor bar is vertical with the reinforcing bar of 6 side of bottom plate exposing to be connect,
And pour in dell concrete support 7, the upper end of the anchor bar 12 passes through bottom plate 6, the lower end of the anchor bar 12
Across the gap of eight words support 5.In addition, the reserved of the top and bottom of anchor bar 12 is also constructed for subsequent deep basal pit side wall 13
Provide condition.
It further include side for the ease of the construction of deep basal pit side wall 13 in the foundation pit structure as preferable embodiment
Wall reserved steel bar 11, the side wall reserved steel bar 11 perpendicular to bottom plate 6, and pour in dell concrete support 7, the side
The upper end of wall reserved steel bar 11 passes through bottom plate 6, and the lower end of the side wall reserved steel bar 11 passes through the gap of eight words support 5.
Embodiment 2:
Referring to figs. 1 to Fig. 4, the present embodiment provides a kind of construction methods of foundation pit structure of embodiment 1, including walk as follows
It is rapid:
The first step carries out the construction of shallow hole building enclosure 1 and dell building enclosure 2；
Shallow hole concrete support 10 is arranged in second step between the two sides of shallow hole building enclosure 1；
Third step excavates shallow foundation hole 8；
4th step cheats 8 bottoms in shallow foundation and pours reinforcement cushion 3 after shallow foundation cheats the 8 bottoms reserved excavation of deep basal pit 9 position；
5th step connects the reinforcement cushion 3 of the two sides of 9 reserved location of deep basal pit by power transmission stiffening plate 4, and power transmission is reinforced
Pass through eight words support, 5 connection between the end and reinforcement cushion 3 of plate 4；
6th step pours bottom plate 6 on reinforcement cushion 3；
7th step is connect vertical with 6 side of the bottom plate reinforcing bar exposed in the middle part of anchor bar 12, the lower end of anchor bar 12
Across the gap of eight words support 5；
Side wall reserved steel bar 11 is set to 12 side of anchor bar by the 8th step, and the lower end of side wall reserved steel bar 11 passes through
The gap of eight words support 5；
Dell concrete support 7, anchor bar 12 is arranged in 9th step between the bottom plate 6 of 9 reserved location two sides of deep basal pit
It is poured in dell concrete support 7 with side wall reserved steel bar 11, anchor bar 12 and the upper end of side wall reserved steel bar 11 pass through
Bottom plate 6；
Tenth step, deep pit excavation 9.
The construction method of the foundation pit structure of the present embodiment is laid with reinforcement cushion 3 under bottom plate 6, and passes through power transmission stiffening plate 4
The reinforcement cushion 3 of 9 two sides of deep basal pit is linked together, forms complete structural body with the building enclosure in the outside in shallow foundation hole 8
System especially reduces intensity after dell concrete support 7 does not construct or constructs and not up to wants to reduce the deformation of foundation pit
The deformation of foundation pit in the period asked.
In addition, the setting of power transmission stiffening plate 4 is also that anchor bar 12 and side wall reserved steel bar 11 anchor into dell concrete branch
Support 7 provides time and space, so that the construction of the deep basal pit side wall 13 for after provides condition, and makes structure construction
When, dell concrete support 7 does not have to be removed, and can continue the deformation for playing the role of keeping out foundation pit.
As preferable embodiment, in the construction method of the foundation pit structure, specifically, further include the 11st step, it will
Anchor bar 12 is connect with the reinforcing bar of deep basal pit side wall 13 respectively with the both ends of side wall reserved steel bar 11, and carries out deep basal pit side wall
13 pour.
As preferable embodiment, in the construction method of the foundation pit structure, in order to reinforce the resistance to deformation in shallow foundation hole 8
Ability in third step, while excavating shallow foundation hole 8, is arranged shallow hole below shallow hole concrete support 10 and reinforces support.
As preferable embodiment, in the construction method of the foundation pit structure, for the ease of constructing, in the tenth step,
Before deep pit excavation 9, eight words support 5 and power transmission stiffening plate 4 are removed.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (10)
1. a kind of foundation pit structure, which is characterized in that including shallow foundation hole (8) and excavate in the deep basal pit of shallow foundation hole (8) bottom
(9), the bottom of the shallow foundation hole (8) is laid with reinforcement cushion (3), is laid with bottom plate (6) on the reinforcement cushion (3), the depth base
The reinforcement cushion (3) for cheating (9) two sides is connected by power transmission stiffening plate (4).
2. foundation pit structure as described in claim 1, which is characterized in that setting shallow hole goes along with sb. to guard him knot around the shallow foundation hole (8)
Dell building enclosure (2) are arranged around the deep basal pit (9) in structure (1), and shallow hole is arranged between the two sides of the shallow foundation hole (8)
Dell concrete support (7) are arranged between the bottom plate (6) of deep basal pit (9) two sides in concrete support (10).
3. foundation pit structure as claimed in claim 2, which is characterized in that the end of the power transmission stiffening plate (4) and reinforcement cushion
(3) pass through eight words support (5) connection between.
4. foundation pit structure as claimed in claim 3, which is characterized in that the dell concrete support (7) is respectively arranged at biography
The top of power stiffening plate (4).
5. foundation pit structure as claimed in claim 4, which is characterized in that further include anchor bar (12), the anchor bar
(12) perpendicular to bottom plate (6), it is vertical with the reinforcing bar of bottom plate (6) side exposing in the middle part of the anchor bar (12) to connect, and pour
It builds in dell concrete support (7), the upper end of the anchor bar (12) passes through bottom plate (6), the anchor bar (12)
Lower end passes through the gap of eight words support (5).
6. foundation pit structure as claimed in claim 5, which is characterized in that further include side wall reserved steel bar (11), the side wall is pre-
Stay reinforcing bar (11) perpendicular to bottom plate (6), and pour in dell concrete support (7), the side wall reserved steel bar (11)
Upper end passes through bottom plate (6), and the lower end of the side wall reserved steel bar (11) passes through the gap of eight words support (5).
7. a kind of construction method of foundation pit structure as claimed in claim 6, which comprises the steps of:
The first step carries out the construction of shallow hole building enclosure (1) and dell building enclosure (2)；
Shallow hole concrete support (10) are arranged between the two sides of shallow hole building enclosure (1) in second step；
Third step excavates shallow foundation hole (8)；
4th step, after deep basal pit (9) excavation position is reserved in shallow foundation hole (8) bottom, in shallow foundation hole, (8) bottom pours reinforcement cushion
(3)；
5th step connects the reinforcement cushion (3) of the two sides of deep basal pit (9) reserved location by power transmission stiffening plate (4), and power transmission adds
It is connect between the end and reinforcement cushion (3) of strong plate (4) by eight words support (5)；
6th step pours bottom plate (6) on reinforcement cushion (3)；
7th step is connect, under anchor bar (12) by vertical with bottom plate (6) the side reinforcing bar exposed in the middle part of anchor bar (12)
It holds across the gap of eight words support (5)；
Side wall reserved steel bar (11) is set to anchor bar (12) side by the 8th step, and the lower end of side wall reserved steel bar (11) is worn
Cross the gap of eight words support (5)；
Dell concrete support (7) are arranged between the bottom plate (6) of deep basal pit (9) reserved location two sides, anchor bar in 9th step
(12) it is poured in dell concrete support (7) with side wall reserved steel bar (11), anchor bar (12) and side wall reserved steel bar
(11) upper end passes through bottom plate (6)；
Tenth step, deep pit excavation (9).
8. the construction method of foundation pit structure as claimed in claim 7, which is characterized in that further include the 11st step, steel will be anchored
Muscle (12) is connect with the reinforcing bar of deep basal pit side wall (13) respectively with the both ends of side wall reserved steel bar (11), and carries out deep basal pit side wall
(13) pour.
9. the construction method of foundation pit structure as claimed in claim 7, which is characterized in that in third step, excavate shallow foundation hole (8)
Meanwhile setting shallow hole reinforces support below shallow hole concrete support (10).
10. the construction method of foundation pit structure as claimed in claim 7, which is characterized in that in the tenth step, in deep pit excavation
(9) before, eight words support (5) and power transmission stiffening plate (4) are removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811607660.0A CN109440774A (en) | 2018-12-27 | 2018-12-27 | A kind of foundation pit structure and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811607660.0A CN109440774A (en) | 2018-12-27 | 2018-12-27 | A kind of foundation pit structure and its construction method |
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| Publication Number | Publication Date |
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| CN109440774A true CN109440774A (en) | 2019-03-08 |
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ID=65537617
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811607660.0A Pending CN109440774A (en) | 2018-12-27 | 2018-12-27 | A kind of foundation pit structure and its construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813983A (en) * | 2020-12-31 | 2021-05-18 | 长江勘测规划设计研究有限责任公司 | Cantilever beam-column system implemented synchronously with pit depth in pit and construction method |
| CN113737857A (en) * | 2021-10-09 | 2021-12-03 | 中国建筑第二工程局有限公司 | Be used for deep pipe gallery structure and major structure to build connection structure again and worker's method thereof |
| CN115478544A (en) * | 2022-11-02 | 2022-12-16 | 北京市政建设集团有限责任公司 | Interim biography power additional strengthening of foundation ditch |
| CN117090224A (en) * | 2023-10-18 | 2023-11-21 | 上海建工集团股份有限公司 | Edge-pasting pit-in-pit unsupported enclosure system and construction method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112813983A (en) * | 2020-12-31 | 2021-05-18 | 长江勘测规划设计研究有限责任公司 | Cantilever beam-column system implemented synchronously with pit depth in pit and construction method |
| CN112813983B (en) * | 2020-12-31 | 2022-07-22 | 长江勘测规划设计研究有限责任公司 | Cantilever beam-column system implemented synchronously with pit depth in pit and construction method |
| CN113737857A (en) * | 2021-10-09 | 2021-12-03 | 中国建筑第二工程局有限公司 | Be used for deep pipe gallery structure and major structure to build connection structure again and worker's method thereof |
| CN115478544A (en) * | 2022-11-02 | 2022-12-16 | 北京市政建设集团有限责任公司 | Interim biography power additional strengthening of foundation ditch |
| CN115478544B (en) * | 2022-11-02 | 2023-08-29 | 北京市政建设集团有限责任公司 | Temporary force transmission reinforcing structure for foundation pit |
| CN117090224A (en) * | 2023-10-18 | 2023-11-21 | 上海建工集团股份有限公司 | Edge-pasting pit-in-pit unsupported enclosure system and construction method thereof |
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