CN109440772A - A kind of interim power transmission reinforcement structure of foundation pit and construction method - Google Patents
A kind of interim power transmission reinforcement structure of foundation pit and construction method Download PDFInfo
- Publication number
- CN109440772A CN109440772A CN201811472672.7A CN201811472672A CN109440772A CN 109440772 A CN109440772 A CN 109440772A CN 201811472672 A CN201811472672 A CN 201811472672A CN 109440772 A CN109440772 A CN 109440772A
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- Prior art keywords
- power transmission
- shallow hole
- interim power
- dell
- foundation pit
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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
-
- 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
The invention discloses a kind of interim power transmission reinforcement structure of foundation pit and construction methods, belong to civil construction project technical field.For solving the problem of that there are dell concrete support constructions when depth hole to cause foundation pit deformation not in time in base pit engineering.The construction method of the interim power transmission reinforcement structure of foundation pit of the invention, comprising the following steps: step 1: building shallow hole building enclosure, dell building enclosure and the support of the road shallow hole head；Step 2: the earthwork of shallow hole construction area and shallow hole reinforcement cushion of constructing are excavated；Step 3: it when excavating dell construction area to designed elevation, while pouring interim power transmission and reinforcing bed course；Step 4: dell concrete support of constructing after dell is supported by work surface.The present invention can reduce before dell concrete support is constructed to the maximum extent and reach the deformation of foundation pit before intensity, realize the control action to foundation pit deformation caused by foundation pit exposure tau-effect, reduce influence of the foundation pit exposure tau-effect to surrounding enviroment.
Description
Technical field
The present invention relates to a kind of interim power transmission reinforcement structure of foundation pit and construction methods, refer in particular to, and there are depth, shallow holes to construct
When, in the case where dell concrete support intensity not up to requires, a kind of reduction tau-effect causes the interim of foundation pit deformation
Power transmission reinforcement structure and its construction method.Belong to civil construction project technical field of construction.
Background technique
With the needs that city continues to develop, land use is more and more nervous, in order to meet matching for original buildings or structures
Utility function is covered, narrow space is also developed constantly between buildings or structures.The exploitation of small space certainly will cause
Close on the deformation of buildings or structures, and the protection of buildings or structures require it is higher and higher, especially close on subway, magnetic suspension,
The Foundation Pit Construction of runway, taxiway, tall and big buildings or structures, therefore, the control of foundation pit deformation becomes in work progress
It obtains more and more important.
When, there are when depth hole, the construction of dell concrete support will cause foundation pit deformation not in time in base pit engineering.Mesh
Before, base pit engineering has solved the excessive deformation of foundation pit by foundation pit enclosure supported design in principle, therefore, in work progress
Foundation pit deformation caused by tau-effect becomes to get more and more attention, and especially can excavation of foundation pit rear support construct and apply in time
It can play a role in time after work most important to deformation caused by the tau-effect of foundation pit is kept out.Therefore, in this feelings
Reduce the technical problem that foundation pit deformation caused by tau-effect is engineers and technicians' urgent need to resolve under condition.
Summary of the invention
Technical problem to be solved by the present invention lies in a kind of interim power transmission reinforcement structure of foundation pit is provided, for there are the depths
Hole construction when, dell concrete support intensity not up to require in the case where, can temporal limitation dell excavation shallow hole is enclosed
The influence of watch box system.
To solve the above-mentioned problems, The technical solution adopted by the invention is as follows:
A kind of interim power transmission reinforcement structure of foundation pit, the dell construction including shallow hole construction area and in shallow hole construction area
Area, the shallow hole construction area are equipped with shallow hole building enclosure, and the top of the shallow hole building enclosure is supported equipped with the road shallow hole head, described
Shallow hole construction area has poured shallow hole reinforcement cushion, and the dell construction area is equipped with dell building enclosure, and dell construction area has poured
Bed course is reinforced in interim power transmission, and the both ends that bed course is reinforced in the interim power transmission are connected as one with shallow hole reinforcement cushion by pouring,
It is identical as the absolute altitude of shallow hole reinforcement cushion that bed course is reinforced in interim power transmission.
Further, reinforce the effect that bed course keeps out foundation pit deformation to increase interim power transmission, pad is reinforced in the interim power transmission
The construction area of layer is several elongate in shape, and the construction area interval that bed course and dell concrete support are reinforced in interim power transmission is set
It sets.
Further, the interim power transmission reinforce bed course with a thickness of 40-50cm.
The present invention also provides the construction methods of the interim power transmission reinforcement structure of foundation pit, comprising the following steps:
Step 1: building shallow hole building enclosure, dell building enclosure and the support of the road shallow hole head；
Step 2: after the intensity that shallow hole building enclosure and the road shallow hole head support reaches design requirement, shallow hole construction is excavated
The earthwork in region and shallow hole reinforcement cushion of constructing；
Step 3: when excavating dell to designed elevation, interim power transmission is poured simultaneously in same construction plane and reinforces bed course；
Step 4: dell concrete support of constructing after dell is supported by work surface.
Further, in above-mentioned construction method, in step 2, reach to shallow hole building enclosure and the support of the road shallow hole head and set
After counting desired intensity, the earthwork of shallow hole construction area is excavated；
In step 3, when excavating dell to designed elevation, while pouring interim power transmission and reinforcing bed course and shallow hole reinforcement pad
Layer, and so that interim power transmission is reinforced bed course and be in same construction plane with shallow hole reinforcement cushion.
Tau-effect can be further decreased and become to foundation pit by pouring interim power transmission reinforcement bed course and shallow hole reinforcement cushion simultaneously
The influence of shape.
Further, it is several elongate in shape that the construction area of bed course is reinforced in the interim power transmission, and bed course is reinforced in interim power transmission
It is arranged with the construction area interval of dell concrete support.
Further, the interim power transmission reinforce bed course with a thickness of 40-50cm.
Further, construction method further includes step 5: after waiting the intensity of dells concrete support to meet design requirement, foundation pit
Interim power transmission reinforcement bed course is excavated together with lower section cubic metre of earth in subsequent digging process, carries out next process construction.
Compared with prior art, the beneficial effects of the present invention are:
1, the interim power transmission reinforcement structure of foundation pit of the invention, for the foundation pit construction place cheated there are the depth, dell support
Before construction and after construction before intensity backlog demand, realize that the control to foundation pit deformation caused by foundation pit exposure tau-effect is made
With further reducing the influence to surrounding enviroment.
2, the interim power transmission reinforcement structure of foundation pit of the invention, is particularly suitable for that surrounding enviroment are complicated, soil property environment is poor, become
Shape controls demanding construction environment.What working face carried out that interim power transmission reinforces bed course facility in time after coming out pours operation, fills
Divide foundation pit deformation caused by reducing tau-effect.
3, the interim power transmission reinforcement structure of foundation pit of the invention can independently keep out foundation pit deformation and support before Construction of Supporting
The deformation of foundation pit is kept out after construction jointly.
4, the construction method of the interim power transmission reinforcement structure of foundation pit of the invention, convenient to carry out, construction efficiency is high, convenient for being expert at
It promotes the use in the industry.
Detailed description of the invention
Fig. 1 is the structure drawing in side sectional elevation of interim one preferred embodiment of power transmission reinforcement structure of foundation pit of the present invention.
Fig. 2 is the sectional view along Fig. 1 at A-A.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.According to following explanation, originally
The purposes, technical schemes and advantages of invention will be apparent from.It should be noted that described embodiment is of the invention preferred
Embodiment, instead of all the embodiments.
Referring to figs. 1 and 2, the interim power transmission reinforcement structure of a kind of foundation pit, including shallow hole construction area 7 and applied positioned at shallow hole
Dell construction area 6 in work area 7, the shallow hole construction area 7 are equipped with shallow hole building enclosure 1, the top of the shallow hole building enclosure 1
Equipped with the road shallow hole head support 8.Shallow hole reinforcement cushion 2 is poured in the shallow hole construction area 7, the dell construction area 6 is equipped with deep
Pit enclosure structure 3, dell construction area 6 have poured interim power transmission and have reinforced bed course 5, the interim power transmission reinforce the both ends of bed course 5 with
Shallow hole reinforcement cushion 2, which pours, to be connected as one, and it is identical as the absolute altitude of shallow hole reinforcement cushion 2 that bed course 5 is reinforced in interim power transmission.As excellent
Choosing, the interim power transmission reinforce bed course 5 with a thickness of 40-50cm.
Reinforce the effect that bed course keeps out foundation pit deformation to increase interim power transmission, applying for bed course 5 is reinforced in the interim power transmission
Work area domain is several elongate in shape, and bed course 5 is reinforced in interim power transmission and the construction area interval of dell concrete support 4 is arranged.
The interim power transmission reinforcement structure of foundation pit of the invention takes full advantage of interim power transmission reinforcement bed course 5 and reduces space-time with this
Foundation pit deformation caused by effect.Present invention is particularly suitable for surrounding enviroment complexity, soil property environment is poor, Deformation control is demanding
Construction environment；Foundation pit exposure duration is longer, and support together down it is not formed before, got over according to tau-effect theory foundation pit deformation
Greatly.Interim power transmission provided by the invention reinforces that bed course can intensity be when dell concrete support 4 is not constructed and after construction
It plays a significant role before reaching, reduces the deformation of foundation pit, further reduce the influence to surrounding enviroment.
The present invention also provides the construction methods of the interim power transmission reinforcement structure of above-mentioned foundation pit, comprising the following steps:
Step 1: building shallow hole building enclosure 1, dell building enclosure 3 and the road shallow hole head support 8；
Step 2: it after shallow hole building enclosure 1 and the road shallow hole head support 8 reach the intensity of design requirement, excavates shallow hole and applies
The earthwork in work area domain and shallow hole reinforcement cushion 2 of constructing.
If shallow hole supporting, other than the road shallow hole head support 8, there are also other to support (being not limited to concrete support) for lower part
When, then in this step, it is also necessary to carry out the excavation of the lower part soil body and the construction operation of other supports.
Step 3: when excavating dell construction area 6 to designed elevation, interim power transmission is poured simultaneously in same construction plane and is added
Strong bed course 5.
Specifically, dell construction area is excavated to interim power transmission and reinforces pouring in time when the absolute altitude of bed course 5, and interim power transmission adds
Strong 5 both ends of bed course are poured with shallow hole reinforcement cushion 2 to be connected to.It is passed in this way, bed course 5 is reinforced in interim power transmission by shallow hole reinforcement cushion 2
Power is in shallow hole building enclosure 1.
Step 4: dell concrete support 4 of constructing after dell is supported by work surface.
Specifically, after the operation surface treatment of dell concrete support 4 formwork carry out concrete support pouring construction.It is right
When brace foundation soil layer is softer, to prevent support from settling, support counterdie is wanted using plain concrete cushion layer to meet underlying strength
It asks.When supporting counterdie to use plain concrete cushion layer, reinforce the pouring construction together of bed course 5 with interim power transmission.
In above-mentioned construction method, in order to reduce influence of the tau-effect to foundation pit deformation to the greatest extent, in step 2
In, after shallow hole building enclosure 1 and the road shallow hole head support 8 reach the intensity of design requirement, excavate the earthwork of shallow hole construction area
First shallow hole reinforcement cushion 2 is not poured, and in step 3, when waiting excavation dell construction area 6 to designed elevation, while pouring interim
Bed course 5 and shallow hole reinforcement cushion 2 are reinforced in power transmission, and so that interim power transmission is reinforced bed course 5 and be in same construction with shallow hole reinforcement cushion 2
In plane, make the two power transmission in the same plane.
Reinforce the effect that bed course keeps out foundation pit deformation to increase interim power transmission, applying for bed course 5 is reinforced in the interim power transmission
Work area domain is several elongate in shape, and bed course 5 is reinforced in interim power transmission and the construction area interval of dell concrete support 4 is arranged.
Further, construction method further includes step 5: after waiting the intensity of dells concrete support 4 to meet design requirement, base
Cheat interim power transmission in subsequent digging process and reinforce bed course 5 and excavated together with lower section cubic metre of earth, carry out next process construction, i.e., into
The excavation of the lower skin earthwork of row dell.That is, the principle that bed course 5 carries out block construction is reinforced in interim power transmission, give full play to
The effect of bed course 5 is reinforced in interim power transmission, reduces foundation pit deformation caused by tau-effect to the greatest extent.
The above is only the description explanation of the preferred embodiment of the present invention, and not limiting the scope of the present invention, shows
So, anyone skilled in the art based on the above embodiment, can readily occur in replacement or variation to obtain other implementations
Example, these are covered by the protection scope of the present invention.
Claims (8)
1. a kind of interim power transmission reinforcement structure of foundation pit, the dell construction area including shallow hole construction area and in shallow hole construction area,
The shallow hole construction area is equipped with shallow hole building enclosure, and the top of the shallow hole building enclosure is supported equipped with the road shallow hole head, feature
It is:
The shallow hole construction area has poured shallow hole reinforcement cushion, and the dell construction area is equipped with dell building enclosure, dell construction
Interim power transmission has been poured in area and has reinforced bed course, and the both ends of bed course are reinforced in the interim power transmission and shallow hole reinforcement cushion passes through the company of pouring
It is connected in one, it is identical as the absolute altitude of shallow hole reinforcement cushion that bed course is reinforced in interim power transmission.
2. the interim power transmission reinforcement structure of foundation pit according to claim 1, it is characterised in that:
The construction area that bed course is reinforced in the interim power transmission is several elongate in shape, and bed course and dell concrete are reinforced in interim power transmission
The construction area interval of support is arranged.
3. the interim power transmission reinforcement structure of foundation pit according to claim 1, it is characterised in that:
The interim power transmission reinforce bed course with a thickness of 40-50cm.
4. the construction method of the interim power transmission reinforcement structure of foundation pit as described in claims 1 to 3 any claim, feature exist
In, comprising the following steps:
Step 1: building shallow hole building enclosure, dell building enclosure and the support of the road shallow hole head；
Step 2: after the intensity that shallow hole building enclosure and the road shallow hole head support reaches design requirement, shallow hole construction area is excavated
The earthwork and shallow hole reinforcement cushion of constructing；
Step 3: when excavating dell to designed elevation, interim power transmission is poured simultaneously in same construction plane and reinforces bed course；
Step 4: dell concrete support of constructing after dell is supported by work surface.
5. the construction method of the interim power transmission reinforcement structure of foundation pit as claimed in claim 4, it is characterised in that:
In step 2, after shallow hole building enclosure and the support of the road shallow hole head reach the intensity of design requirement, shallow hole construction is excavated
The earthwork in region；
In step 3, when excavating dell to designed elevation, while pouring interim power transmission and reinforcing bed course and shallow hole reinforcement cushion, and
Make interim power transmission reinforce bed course to be in same construction plane with shallow hole reinforcement cushion.
6. the construction method of the interim power transmission reinforcement structure of foundation pit according to claim 4, it is characterised in that:
The construction area that bed course is reinforced in the interim power transmission is several elongate in shape, and bed course and dell concrete are reinforced in interim power transmission
The construction area interval of support is arranged.
7. the construction method of the interim power transmission reinforcement structure of foundation pit according to claim 4 or 5, it is characterised in that:
The interim power transmission reinforce bed course with a thickness of 40-50cm.
8. the construction method of the interim power transmission reinforcement structure of foundation pit according to claim 4 or 5, which is characterized in that further include:
Step 5: after waiting the intensity of dells concrete support to meet design requirement, interim power transmission adds in the subsequent digging process of foundation pit
Strong bed course is excavated together with lower section cubic metre of earth, carries out next process construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811472672.7A CN109440772A (en) | 2018-12-04 | 2018-12-04 | A kind of interim power transmission reinforcement structure of foundation pit and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811472672.7A CN109440772A (en) | 2018-12-04 | 2018-12-04 | A kind of interim power transmission reinforcement structure of foundation pit and construction method |
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| CN109440772A true CN109440772A (en) | 2019-03-08 |
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| CN201811472672.7A Pending CN109440772A (en) | 2018-12-04 | 2018-12-04 | A kind of interim power transmission reinforcement structure of foundation pit and construction method |
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| CN110735434A (en) * | 2019-10-16 | 2020-01-31 | 中国建筑一局(集团)有限公司 | Construction method for replacing traditional inner support by underground force transmission belt in long and narrow deep foundation pits |
| CN111411629A (en) * | 2020-03-16 | 2020-07-14 | 徐州市城市轨道交通有限责任公司 | Construction method for common pile excavation of long and narrow type wind pavilion structure and main body structure |
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| CN110735434A (en) * | 2019-10-16 | 2020-01-31 | 中国建筑一局(集团)有限公司 | Construction method for replacing traditional inner support by underground force transmission belt in long and narrow deep foundation pits |
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