CN108978670A - A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support - Google Patents
A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support Download PDFInfo
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- CN108978670A CN108978670A CN201710400543.6A CN201710400543A CN108978670A CN 108978670 A CN108978670 A CN 108978670A CN 201710400543 A CN201710400543 A CN 201710400543A CN 108978670 A CN108978670 A CN 108978670A
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- Prior art keywords
- support
- pit
- deep
- tiltedly
- deep basal
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Abstract
A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support, it is arranged in deep basal pit lower part equipment side of the base plate and tiltedly throws support, it is characterised in that the following steps are included: a, deep pit excavation, b, casting concrete support, c, several oblique throwing supports are set, completes deep basal pit locally deep pit and tiltedly throws support supporting.Deep basal pit locally deep pit of the invention, which tiltedly throws support method for protecting support, has oblique throwing support suspension device structure simple, easy for construction, construction quality is safe and reliable, greatly reduce support engineering amount, improve speed of application, reduce the full purlin supporting of original deep basal pit, supporting only is carried out to foundation pit one side, reduces pattern foundation pit supporting structure measure expense up to 70% or more advantage.
Description
Technical field
The present invention relates to a kind of foundation pits of foundation of civil work engineering, specifically, being that a kind of deep basal pit locally deep pit tiltedly throws support
Method for protecting support.
Background technique
Building surface in big industrial factory is respectively provided with more Equipment Foundations, according to each Equipment Foundations size of difference of process equipment, buries
Deep etc. different, often large equipment base buried depth degree is deeper, and the installation of multiple equipment on the basis of satisfaction plays difference
Effect.
Deep basal pit is relatively conventional in the realm of building construction, is existed according to cutting depth, underground aqueous condition, surrounding enviroment etc. more
Kind digging mode is selective, and relatively conventional is slope heavy excavation.But when surrounding enviroment are more complex, slope heavy excavation just needs
The excavation for having supporting is carried out, according to also needing to choose whether the case where underground water to increase water-stop curtain.Large equipment base generally compared with
For complexity, there are locally deep pits, it is contemplated that in terms of construction period and economic benefit, it is special according to Equipment Foundations formal character to need
Support pattern.
General large equipment base is pile weight, and because Equipment Foundations elevation of bottom is different, stake top absolute altitude is also different, basis
Need to consider that the stake shallower to buried depth is protected when excavation, the supporting of deep basal pit is also needed according to foundation pile position, absolute altitude is different and
Carry out special design.
The relatively conventional support form of deep basal pit be Section-steel Piles supporting, need a large amount of Section-steel Piles to foundation pit deep part into
Row supporting, to protect surrounding enviroment not to be destroyed.But Section-steel Piles supporting is when constructing clump of piles Equipment Foundations, because of its stake top absolute altitude
Different mechanical equipments are difficult to carry out an injection operation, and the clump of piles duration of constructing is longer, and deep foundation pit support measure cost is high.
Therefore known deep basal pit locally deep pit Section-steel Piles support pattern there are problems that it is above-mentioned various inconvenient and.
Summary of the invention
The purpose of the present invention is to propose a kind of safe and reliable deep basal pit office of diagonal brace steel pipe based on concrete bearing
Portion's dell tiltedly throws support method for protecting support.
To achieve the above object, the technical solution of the invention is as follows:
A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support, is arranged in deep basal pit lower part equipment side of the base plate and tiltedly throws support, special
Sign be the following steps are included:
A, deep pit excavation
Deep pit excavation, base area survey report and carry out slope heavy excavation, are excavated to deep basal pit substrate；
B, casting concrete support, comprising the following steps:
(1) in deep basal pit lower part equipment side of the base plate, the long 1500mm in concrete bearing bottom, wide 1400mm, concrete branch are set
Seat bottom is laid with several main reinforcements, and bottom level selects the three-level reinforcing bar of 9 diameter 25mm to main reinforcement, main reinforcement anchor into bottom plate >=
800mm, each main reinforcement spacing are 150mm；The high 1000mm of concrete bearing, support top width 500mm, support top to support bottom rear slopes
Segment length 1300mm, the gradient of rear slopes are 135 degree；The preceding slope segment length >=800mm in support top to support bottom, the gradient α on preceding slope
It can need to adjust according to support support angle is tiltedly thrown；Embedded iron is set in the middle part of preceding slope section, the bottom end for tiltedly throwing support is welded admittedly；
(2) casting concrete
Lower part equipment of constructing basis, in lower part equipment side of the base plate casting concrete support；
C, several oblique throwing supports are set
Equipment Foundations and concrete bearing are arranged after constructing tiltedly throws support, tiltedly throws support and uses steel pipe, length of steel pipe is insufficient to adopt
The method bolted with flange, the top of steel pipe and type steel support weld, and several oblique throwing supports, which are arranged side by side, forms whole stiffness structure,
It completes deep basal pit locally deep pit and tiltedly throws support supporting.
Deep basal pit locally deep pit of the invention tiltedly throws support method for protecting support can also be using technical measures below come further
It realizes.
Method above-mentioned, wherein the support stirrup specification is the three-level reinforcing bar of diameter 10mm spacing 150mm, stirrup range
It is extended for support to outside.
Method above-mentioned, wherein the diagonal brace steel pipe specification is 508x12mm.
Method above-mentioned, wherein the insufficient method using flange bolt of the length of steel pipe is connected and lengthened.
Method above-mentioned, wherein the bolt specification of flange bolt is not less than M20 plain bolt.
Method above-mentioned, wherein the plane of the embedded iron need to be vertical with steel pipe.
Method above-mentioned, wherein the weld bead height of the top of the steel pipe and type steel support welding is not less than 10mm.
It is had the advantage that after adopting the above technical scheme, deep basal pit locally deep pit of the invention tiltedly throws support method for protecting support
1, it is simple, easy for construction tiltedly to throw support suspension device structure；
2, construction quality is safe and reliable, greatly reduces support engineering amount, improves speed of application；
3, the full purlin supporting of original deep basal pit is reduced, supporting only is carried out to foundation pit one side, reduces pattern foundation pit supporting structure measure expense up to 70%
More than, reduce engineering cost.
Detailed description of the invention
Fig. 1 is the concrete bearing structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view in Fig. 1；
Fig. 3 is that the deep basal pit locally deep pit of the embodiment of the present invention tiltedly throws support plan view；
Fig. 4 is that use state diagram is supportted in the oblique throwing of the embodiment of the present invention；
Fig. 5 is the oblique throwing support and fashioned iron purlin connection schematic diagram of the embodiment of the present invention；
Fig. 6 is the B-B cross-sectional view in Fig. 5.
In figure: 1 concrete bearing, 2 horizontal main reinforcements, 3 stirrups, 4 tiltedly throwing supports, 5 embedded irons, 6 vertical main reinforcements, 7 bottom plate main reinforcements,
8 type steel supports, 9 fashioned iron purlins, 10 dells, 11 natural ground, the 12 brick platforms that intercept water, 13 the 1st grades of slopes, 14 the 2nd grades of slopes, 15
Stay soil, 16 the 1st steel sheet piles, 17 the 2nd steel sheet piles, 18 stiffening plates.
Specific embodiment
With reference to embodiments and its attached drawing further explains the present invention.
Embodiment 1
Deep basal pit locally deep pit of the invention tiltedly throws support method for protecting support, comprising the following steps:
A, deep pit excavation
Deep pit excavation, base area survey report and carry out slope heavy excavation, are excavated to substrate.
Referring now to Fig. 3 and Fig. 4, Fig. 3 is that the deep basal pit locally deep pit of the embodiment of the present invention tiltedly throws support horizontal layout signal
Figure, Fig. 4 are that use state diagram is supportted in the oblique throwing of the embodiment of the present invention.As shown, the nature ground 11 is through surrounding one
After the brick platform 12 that intercepts water of circle, make slope heavy excavation through the 1st grade of slope 13 and the 2nd grade of slope 14, finally in the side of dell 10
It carries out deep basal pit locally deep pit and tiltedly throws support supporting.It is in a row supported simultaneously in parallel by several oblique throwing supports, tiltedly throws one end and the fashioned iron of support 4
Support 8 and fashioned iron purlin 9 are welded to connect, and the other end is based on concrete bearing 1.
B, casting concrete support, comprising the following steps:
(1) concrete bearing 1, the long 1500mm in bottom, wide 1400mm are set.It is laid with several main reinforcements of concrete rest base, bottom
The horizontal main reinforcement 2 in portion, horizontal main reinforcement select the three-level reinforcing bar of 9 diameter 25mm, anchor into bottom plate main reinforcement 800mm.Between each horizontal main reinforcement 2
Away from for 150mm.The high 1000mm of concrete bearing is used cooperatively vertical main reinforcement 6, the wide 500mm of holder top, holder top to support
Bottom rear slopes segment length 1300mm, the gradient of rear slopes are 135 degree.The preceding slope segment length 800mm in support top to support bottom, preceding slope
Gradient α can need to adjust according to 4 support angles of support are tiltedly thrown.Embedded iron 5 is set in the middle part of preceding slope section, is used to support diagonal brace steel
Pipe.Fig. 1 is the concrete bearing structural schematic diagram of the embodiment of the present invention, and Fig. 2 is the A-A cross-sectional view in Fig. 1.The support stirrup
Specification is the three-level reinforcing bar of diameter 10mm spacing 150mm, and 3 range of stirrup is that support is extended to outside.The diagonal brace steel 4 pipe used
Specification is 508x12mm.The insufficient method using flange bolt of the length of steel pipe, which connects, to be lengthened, and bolt is general not less than M20
Logical bolt.
(2) casting concrete
Lower part equipment of constructing basis, in side of the base plate casting concrete support；
C, support construction is tiltedly thrown
Equipment Foundations and concrete bearing carry out tiltedly throwing support construction after constructing, and tiltedly throw support and use steel pipe, because steel pipe respectively to by
Power is uniform, and local weak is avoided to cause support unstability, the insufficient method bolted using flange of length of steel pipe, and bolt is not less than
M20 plain bolt.Steel pipe bottom is supported on support embedded part, according to stress condition, it is ensured that and steel pipe is vertical with embedded iron plane, and
It is welded and fixed with embedded iron, top and type steel support weld, and form whole stiffness structure, and weld bead height is not less than 10mm.
Fig. 5 is the oblique throwing support and fashioned iron purlin connection schematic diagram of the embodiment of the present invention, and Fig. 6 is the B-B cross-sectional view in Fig. 5.
The plane of the embedded iron need to be vertical with steel pipe.The weld bead height of the top of the steel pipe and type steel support welding is not
Less than 10mm.Supporting steel pipe and the steel sheet pile of steel purlin handover place add two blocks of steel plates 18, two pieces of steel plate interval 2000mm.
The present invention has substantive distinguishing features and significant technological progress, and deep basal pit locally deep pit of the invention tiltedly throws support supporting
Method the method for the present invention, the full supporting of abandoning tradition greatly reduce support engineering amount, improve speed of application to support method.Work
Cheng Anquan is guaranteed, and the present invention is checked by qualified designing institute, safe and reliable.It saves supporting measure to take, the present invention
The full purlin supporting of original deep basal pit is reduced, only foundation pit one side carries out supporting, reduces pattern foundation pit supporting structure measure expense up to 70% or more.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or variation.Therefore, all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (7)
1. a kind of deep basal pit locally deep pit tiltedly throws support method for protecting support, it is arranged in deep basal pit lower part equipment side of the base plate and tiltedly throws support,
Be characterized in that the following steps are included:
A, deep pit excavation
Deep pit excavation, base area survey report and carry out slope heavy excavation, are excavated to deep basal pit substrate；
B, casting concrete support, comprising the following steps:
(1) in deep basal pit lower part equipment side of the base plate, the long 1500mm in concrete bearing bottom, wide 1400mm, concrete branch are set
Seat bottom is laid with several main reinforcements, and bottom level selects the three-level reinforcing bar of 9 diameter 25mm to main reinforcement, main reinforcement anchor into bottom plate >=
800mm, each main reinforcement spacing are 150mm；The high 1000mm of concrete bearing, support top width 500mm, support top to support bottom rear slopes
Segment length 1300mm, the gradient of rear slopes are 135 degree；The preceding slope segment length >=800mm in support top to support bottom, the gradient α on preceding slope
It can need to adjust according to support support angle is tiltedly thrown；Embedded iron is set in the middle part of preceding slope section, the bottom end for tiltedly throwing support is welded admittedly；
(2) casting concrete
Lower part equipment of constructing basis, in lower part equipment side of the base plate casting concrete support；
C, several oblique throwing supports are set
Equipment Foundations and concrete bearing are arranged after constructing tiltedly throws support, tiltedly throws support and uses steel pipe, length of steel pipe is insufficient to adopt
The method bolted with flange, the top of steel pipe and type steel support weld, and several oblique throwing supports, which are arranged side by side, forms whole stiffness structure,
It completes deep basal pit locally deep pit and tiltedly throws support supporting.
2. deep basal pit locally deep pit as described in claim 1 tiltedly throws support method for protecting support, which is characterized in that the support stirrup rule
Lattice are the three-level reinforcing bar of diameter 10mm spacing 150mm, and stirrup range is that support is extended to outside.
3. deep basal pit locally deep pit as described in claim 1 tiltedly throws support method for protecting support, which is characterized in that the diagonal brace steel pipe rule
Lattice are 508x12mm.
4. deep basal pit locally deep pit as described in claim 1 tiltedly throws support method for protecting support, which is characterized in that the length of steel pipe is not
The method using flange bolt of foot, which connects, to be lengthened.
5. deep basal pit locally deep pit as claimed in claim 4 tiltedly throws support method for protecting support, which is characterized in that the flange bolt
Bolt specification is not less than M20 plain bolt.
6. deep basal pit locally deep pit as described in claim 1 tiltedly throws support method for protecting support, which is characterized in that the embedded iron is put down
It face need to be vertical with steel pipe.
7. deep basal pit locally deep pit as described in claim 1 tiltedly throws support method for protecting support, which is characterized in that the top of the steel pipe
It is not less than 10mm with the weld bead height of type steel support welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710400543.6A CN108978670A (en) | 2017-05-31 | 2017-05-31 | A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710400543.6A CN108978670A (en) | 2017-05-31 | 2017-05-31 | A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108978670A true CN108978670A (en) | 2018-12-11 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710400543.6A Pending CN108978670A (en) | 2017-05-31 | 2017-05-31 | A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203654294U (en) * | 2013-12-16 | 2014-06-18 | 上海建工二建集团有限公司 | Foundation pit supporting structure used in reverse building method |
| CN104631468A (en) * | 2015-03-11 | 2015-05-20 | 中国建筑第八工程局有限公司 | Supporting method for foundation pit excavation project |
| CN204456133U (en) * | 2014-10-31 | 2015-07-08 | 广西五鸿建设集团有限公司 | A kind of foundation pit earth pressure-controlled structure |
| CN204662455U (en) * | 2015-04-01 | 2015-09-23 | 马鞍山十七冶工程科技有限责任公司 | Foundation pit support device reinforced by a kind of adjustable diagonal brace |
-
2017
- 2017-05-31 CN CN201710400543.6A patent/CN108978670A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203654294U (en) * | 2013-12-16 | 2014-06-18 | 上海建工二建集团有限公司 | Foundation pit supporting structure used in reverse building method |
| CN204456133U (en) * | 2014-10-31 | 2015-07-08 | 广西五鸿建设集团有限公司 | A kind of foundation pit earth pressure-controlled structure |
| CN104631468A (en) * | 2015-03-11 | 2015-05-20 | 中国建筑第八工程局有限公司 | Supporting method for foundation pit excavation project |
| CN204662455U (en) * | 2015-04-01 | 2015-09-23 | 马鞍山十七冶工程科技有限责任公司 | Foundation pit support device reinforced by a kind of adjustable diagonal brace |
Non-Patent Citations (1)
| Title |
|---|
| 蒋跃楠: "《斜撑支护体系在超大面积深基坑中的应用探讨》", 《建筑施工》 * |
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Application publication date: 20181211 |