CN206562618U - A kind of basin excavation steel structure horizontal bracing unit - Google Patents
A kind of basin excavation steel structure horizontal bracing unit Download PDFInfo
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- CN206562618U CN206562618U CN201720201410.1U CN201720201410U CN206562618U CN 206562618 U CN206562618 U CN 206562618U CN 201720201410 U CN201720201410 U CN 201720201410U CN 206562618 U CN206562618 U CN 206562618U
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Abstract
A kind of basin excavation steel structure horizontal bracing unit, including the structural beam slab in the middle part of foundation ditch and the soil-baffling structure positioned at foundation pit side-wall, horizontally disposed " lattice " bracing members between the structural beam slab and soil-baffling structure, " lattice " bracing members are connected by enclosing purlin with soil-baffling structure, and " lattice " the bracing members bottom sets vertical supporting system.In the support system, prefabricated " lattice " support system is set between the basement structure floor and soil-baffling structure constructed in advance, support axle center is consistent with agent structure floor absolute altitude.The main bearing member of lattice support is located at both sides above and below the structure floor of construction in later period, and structural slab may pass through support system, and the construction in later period of structural slab is unaffected.
Description
Technical field
The utility model is related to Base hole supporting technology field, and in particular to a kind of basin excavation steel structure horizontal bracing unit.
Background technology
It is general to use inner support support technology in the base pit engineering of not outer anchor condition.In the prior art, general interior branch
Supporting system is general by being constituted with lower member：
1. soil-baffling structure, such as campshed, diaphragm wall；
2. supporting construction, such as concrete support, steel pipe or type steel support；
3. vertical load transfer device, such as shaped steel column, firm lattice column and stand column pile；
4. enclose purlin.
The support system construction process is generally：
1. soil-baffling structure of constructing（Campshed, diaphragm wall）；
2. the first floor cubic metre of earth is excavated, construction stand column pile and column；
3. the first row of construction supports and enclosed purlin；
4. excavating the second layer cubic metre of earth, construction second row supports and enclosed purlin；
5. repeating the 4th step, substrate is excavated to；
6. agent structure of constructing, should take support replacement measure during construction to support absolute altitude, supporting construction is removed, then applies upwards
Work agent structure.
General support system has following major defect：
1. supporting construction is generally foundation ditch both sides to setting circular ring type to support in the middle of support or foundation ditch, when foundation ditch area is larger
Need a large amount of concrete or steel as temporary support or column, waste is serious after the later stage removes；
2. agent structure needs to be constructed after foundation ditch is integrally excavated to bottom, construction period is longer；
3. main structure construction influences larger to should first carry out support replacement when supporting absolute altitude and tear support process open on the duration.
Utility model content
The purpose of this utility model is to provide a kind of basin excavation steel structure horizontal bracing unit, can be applied to without outer anchor bar
Part, Deformation control requirement are strict, using the base pit engineering of the short support supporting of basin excavation.
To achieve the above object, the utility model uses following technical scheme：
A kind of basin excavation steel structure horizontal bracing unit, including structural beam slab in the middle part of foundation ditch and positioned at foundation pit side-wall
Soil-baffling structure, is horizontally disposed with " lattice " bracing members between the structural beam slab and soil-baffling structure, " lattice " bracing members pass through
Enclose purlin to be connected with soil-baffling structure, " lattice " the bracing members bottom sets vertical supporting system.
The soil-baffling structure is campshed or diaphragm wall.
" lattice " bracing members are the hollow structure being made up of many angle steel or H profile steel, between each angle steel or H profile steel
Connected by batten plate.
The vertical supporting system includes column and stand column pile, and " lattice " bracing members pass through coupling beam and column phase
Even.
" lattice " bracing members and enclose prestressing apparatus is set between purlin.The prestressing apparatus purpose of setting is to meet base
Pattern foundation pit supporting structure requirement when hole deformation requirements are stricter.
Described basin excavation steel structure horizontal bracing unit construction technology, comprises the following steps：
1）Construction soil-baffling structure；
2）The earthwork and foundation ditch edge upper strata cubic metre of earth in the middle part of excavation pit, in the reserved local soil zone in soil-baffling structure side, are formed
The basin shape of " middle deep, periphery is shallow "；And soil zone carries out temporary supporting to ensure self stability；At middle part, excavation of foundation pit is to base
During bottom, end bay reserves soil zone and also serves as a kind of soil-baffling structure, is played an important role in whole support system；
3）Construction column and stand column pile；
4）The agent structure of construction foundation pit middle part construction in advance；
5）Using the structural beam slab constructed in advance in the middle part of foundation ditch as counter-force point, " lattice " is set between soil-baffling structure at it
Bracing members are used as vertical Force transmission partses with purlin, bracing members bottom is enclosed using column and coupling beam；
6）Excavate under local reserved soil zone to second row support absolute altitude；
7）Lower floor's main body contignation at the reserved soil zone of construction, sets second row " lattice " bracing members and encloses purlin；
8）Repeat step 6）, step 7）, it is excavated to substrate；
9）Construct from the bottom to top agent structure basis, exterior wall, post in the range of reserved soil zone, beam, plate and middle part have been constructed knot
Structure, which is realized, to be merged.After the completion of construction, floor is passed through in the middle part of " lattice " bracing members in the range of reserved soil zone, can on support batten plate
Punching passes through floor bar, is backfilled after outer wall of basement construction waterproof.
In the support system, set between the basement structure floor and soil-baffling structure constructed in advance prefabricated " lattice "
Support system, support axle center is consistent with agent structure floor absolute altitude.The main bearing member of lattice support is located at construction in later period
Structure floor above and below both sides, structural slab may pass through support system, and the construction in later period of structural slab is unaffected.
Compared with prior art, the beneficial effects of the utility model are：
1st, the support system is mainly made up of shorter bracing members and the agent structure constructed in advance, relatively common full branch
Support structure can save substantial amounts of concrete or rolled steel dosage；
2nd, structure floor in the range of soil zone is reserved to later stage end bay because of its hollow structure using " lattice " bracing members system
Construction without influence；
3rd, foundation ditch mid-section body structure is constructed in advance, under end bay reservation conditions, and mid-section body structure construction is unaffected,
Therefore the support system does not influence on the overall duration, relatively general support system can save a large amount of durations；
4th, reserve soil zone to play an important role in support system as a kind of soil-baffling structure, it is ensured that middle part excavation of foundation pit
The deformation of support system meets the requirement of surrounding enviroment after the bottom of to；
5th, structural beam slab is higher as counterforce structure reliability, and beam slab is planar structure, and horizontal rigidity is larger, it is possible to provide can
The support reaction leaned on.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Embodiment 1
A kind of basin excavation steel structure horizontal bracing unit, including structural beam slab 1 in the middle part of foundation ditch and positioned at foundation pit side-wall
Soil-baffling structure 2, the soil-baffling structure be campshed or diaphragm wall.It is horizontally disposed between the structural beam slab 1 and soil-baffling structure 2
" lattice " bracing members 3, " lattice " bracing members 3 are connected by enclosing purlin 4 with soil-baffling structure 2, " lattice " bracing members 3 with
Enclose and prestressing apparatus is set between purlin 4, when Deformation control requires stricter, short support and enclose the prestressing apparatus set between purlin.
" lattice " bracing members 3 are the hollow structure that is made up of many angle steel or H profile steel, each angle steel or H profile steel it
Between connected by batten plate.The bottom of " lattice " bracing members 3 sets vertical supporting system.The vertical supporting system includes column
5 and stand column pile 6, " lattice " bracing members 3 are connected by shaped steel coupling beam 7 with column 5, and the column 5 can be steel latticework
Post.
Described basin excavation steel structure horizontal bracing unit construction technology, comprises the following steps：
1）Construction soil-baffling structure 2；
2）The earthwork and foundation ditch edge upper strata cubic metre of earth in the middle part of excavation pit, reserve local soil zone in soil-baffling structure 2, are formed sideways
The basin shape of " middle deep, periphery is shallow "；And soil zone carries out temporary supporting to ensure self stability；
3）Construction column 5 and stand column pile 6；
4）The agent structure of construction foundation pit middle part construction in advance；
5）Using the structural beam slab 1 constructed in advance in the middle part of foundation ditch as counter-force point, " lattice is set between soil-baffling structure 2 at it
Formula " bracing members 3 and purlin 4 is enclosed, the bottom of " lattice " bracing members 3 is used as vertical Force transmission partses using column 5 and shaped steel coupling beam 7；
6）Excavate under local reserved soil zone to second row support absolute altitude；
7）Lower floor's main body contignation at the reserved soil zone of construction, sets second row " lattice " bracing members 3 and encloses purlin 4；
8）Repeat step 6）, step 7）, it is excavated to substrate；
9）Construct from the bottom to top agent structure basis, exterior wall, post in the range of reserved soil zone, beam, plate and middle part have been constructed knot
Structure, which is realized, to be merged.After the completion of construction, floor is passed through from " lattice " support middle part in the range of reserved soil zone, can be opened on support batten plate
Hole passes through floor bar, is backfilled after outer wall of basement construction waterproof.
Wherein, step 3）Central post can be provisional column, also can the later stage as agent structure post reinforcing bar, with structural column knot
Conjunction is used.Stand column pile can be used in combination with Structural Engineering stake.
Step 5）In " lattice " bracing members 3 through setting antipriming, such as seal plate at exterior wall.
Claims (5)
1. a kind of basin excavation steel structure horizontal bracing unit, it is characterised in that including the structural beam slab in the middle part of foundation ditch and be located at
The soil-baffling structure of foundation pit side-wall, is horizontally disposed with " lattice " bracing members, " lattice " between the structural beam slab and soil-baffling structure
Bracing members are connected by enclosing purlin with soil-baffling structure, and " lattice " the bracing members bottom sets vertical supporting system.
2. basin excavation steel structure horizontal bracing unit as claimed in claim 1, it is characterised in that the soil-baffling structure be campshed or
Diaphragm wall.
3. basin excavation steel structure horizontal bracing unit as claimed in claim 1, it is characterised in that " lattice " bracing members are
The hollow structure being made up of many angle steel or H profile steel, is connected between each angle steel or H profile steel by batten plate.
4. basin excavation steel structure horizontal bracing unit as claimed in claim 1, it is characterised in that the vertical supporting system includes
Column and stand column pile, " lattice " bracing members are connected by coupling beam with column.
5. basin excavation steel structure horizontal bracing unit as claimed in claim 1, it is characterised in that " lattice " bracing members with
Enclose and prestressing apparatus is set between purlin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720201410.1U CN206562618U (en) | 2017-03-03 | 2017-03-03 | A kind of basin excavation steel structure horizontal bracing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720201410.1U CN206562618U (en) | 2017-03-03 | 2017-03-03 | A kind of basin excavation steel structure horizontal bracing unit |
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| CN206562618U true CN206562618U (en) | 2017-10-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316316A (en) * | 2018-04-18 | 2018-07-24 | 南京工业大学 | Support system suitable for island type support and application thereof |
| CN109853579A (en) * | 2019-03-13 | 2019-06-07 | 中国十七冶集团有限公司 | A kind of deep basal pit bracing members install brace pre axial force construction method |
-
2017
- 2017-03-03 CN CN201720201410.1U patent/CN206562618U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316316A (en) * | 2018-04-18 | 2018-07-24 | 南京工业大学 | Support system suitable for island type support and application thereof |
| CN109853579A (en) * | 2019-03-13 | 2019-06-07 | 中国十七冶集团有限公司 | A kind of deep basal pit bracing members install brace pre axial force construction method |
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