CN104452775A - Prestress support used for foundation pit and construction method - Google Patents
Prestress support used for foundation pit and construction method Download PDFInfo
- Publication number
- CN104452775A CN104452775A CN201410695643.2A CN201410695643A CN104452775A CN 104452775 A CN104452775 A CN 104452775A CN 201410695643 A CN201410695643 A CN 201410695643A CN 104452775 A CN104452775 A CN 104452775A
- Authority
- CN
- China
- Prior art keywords
- prestressed cable
- foundation ditch
- support
- side bar
- jack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
Abstract
The invention discloses a prestress support used for a foundation pit. The prestress support comprises soil blocking and water stopping row piles which are arranged along the periphery of the foundation pit, an edge beam which is arranged along the soil blocking and water stopping row piles, at least one supporting assembly arranged along the edge beam and prestressed cables arranged corresponding to the supporting assemblies. Each supporting assembly comprises at least supporting rods connected to the edge beam, stand columns connected with the supporting rods, and connecting beams connecting the adjacent supporting beams. Prestressed cables corresponding to the supporting assemblies stretch across the supporting assemblies and are connected with the ends, located on the inner side of the foundation pit, of the supporting assemblies. The two ends of each prestressed cable are connected to the edge beam and exert prestress. According to the prestress support used for the foundation pit, stand columns are greatly reduced, the construction and detachment working amount for an inner support is reduced, due to the fact that the prestress support is only arranged along the periphery of the foundation pit, no inner support is arranged in the middle of the foundation pit, and earth cutting is greatly convenient.
Description
Technical field
The invention belongs to civil construction project field, relate to ground foundation engineering, particularly a kind of pre-loaded support struts for foundation ditch and construction method thereof.
Background technology
The normal support issues using the method for inner support to solve deep foundation ditch in foundation pit supporting project at present, the advantage of interior support is reliably stressed, shortcoming is that cost is high, investment is large, for Large Foundation Pit, the not only gigantic project of inner support, need the longer engineering time, and multiple tracks is supported, because the vertical spacing of every one inner support is less, shoveling is made to become very difficult, excavator directly can not load onto automobile the earthwork, need repeatedly to dig, waste time and energy, in the process of this external basement construction, also need bracing demolition, cause the waste of material and the delay of duration.
Summary of the invention
technical problem:the invention provides a kind of pre-loaded support struts for foundation ditch, it utilizes pre-loaded support struts to instead of conventional inner support, this not only considerably reduces column, decreases the construction of inner support and removes workload, and only arranging along foundation ditch surrounding due to pre-loaded support struts, thus there is no inner support in the middle part of foundation ditch, cut the earth greatly for convenience, in addition, owing to being applied with prestressing force to support, make support effect better, the distortion of pattern foundation pit supporting structure is less.The present invention provides a kind of construction method building the above-mentioned pre-loaded support struts for foundation ditch simultaneously.
technical scheme:pre-loaded support struts for foundation ditch of the present invention, comprise the gear soil sealing campshed arranged along foundation ditch periphery, along the side bar that the native sealing campshed of described gear is arranged, along at least one supporting component that described side bar is arranged, the prestressed cable that arrange corresponding to each supporting component, described supporting component comprises column, and the support bar that be consolidated orthogonal with column, connect the coupling beam of horizontal adjacent supports bar, one end of support bar is connected with side bar, the prestressed cable corresponding with supporting component is across supporting component and be connected with the end that support bar is positioned at inside foundation ditch, the two ends of prestressed cable are connected on side bar, and be applied with prestressing force.
In preferred version of the present invention, the end of support bar is provided with the built-in fitting of the jack installing stretch-draw prestressing force rope, also built-in fitting place be provided with the guarantee part supporting prestressed cable, the two ends of prestressed cable are anchored at side bar.
In preferred version of the present invention, two ends and the ground tackle anchor connection be arranged on side bar of prestressed cable, side bar closes on the pedestal that ground tackle place is provided with the jack installing stretch-draw prestressing force rope.
In preferred version of the present invention, supporting component is multiple, the side bar between two adjacent supporting components is provided with the buttress being attached thereto and connecing or to support.
In preferred version of the present invention, the knuckle place of side bar is provided with angle brace.
In preferred version of the present invention, each column connects multiple support bar from top to bottom, and the equal correspondence in end of each support bar is provided with prestressed cable.
The construction method of the above-mentioned pre-loaded support struts for foundation ditch of structure of the present invention, Specific construction step is:
1) the construction native sealing campshed of gear and column, if be designed with buttress, then buttress of simultaneously constructing;
2) earth excavation is high to the stake top mark keeping off native sealing campshed, construction side bar, support bar and coupling beam, if be designed with angle brace, to support, then angle brace of constructing in the lump, to support, during construction, prestressed cable and tensioning equipment is put into the precalculated position of design;
3) start tensioning equipment, carry out prestressed stretch-draw, after stretch-draw to designing requirement, lock prestressed cable, to keep its stretching force;
4) by above-mentioned steps 2)-3) continue construction, until the prestressed cable of constructed whole supporting component and correspondence thereof;
In the preferred version of the inventive method, step 2) in the jack of stretch-draw dress for being arranged on support bar end, side bar is provided with ground tackle, and the two ends of prestressed cable are anchored on ground tackle; In step 3), top is placed on startup jack after between jack and prestressed cable and carries out stretch-draw, after completing stretch-draw, will ensure that part and jack walk abreast and place, and clamp between top with guarantee part with gad, and after locking stretching force, remove jack.
In the preferred version of the inventive method, step 2) in tensioning equipment be the jack being arranged on side bar and being connected with the two ends of prestressed cable, side bar is provided with the ground tackle in order to anchoring prestress rope two ends; In step 3), at prestressed cable two ends, jack carries out stretch-draw, after completing stretch-draw, prestressed cable anchoring is lived with ground tackle, removes jack after locking stretching force.
In the preferred version of the inventive method, if each column connects multiple support bar from top to bottom in design scheme, then step 2) and 3) in, the first construction support bar of one deck and the prestressed cable of correspondence thereof topmost, then successively construct downwards all the other support bars and corresponding prestressed cable thereof.
beneficial effect:compared with general inner support pattern foundation pit supporting structure, the present invention has the following advantages:
Pre-loaded support struts of the present invention is compared with traditional inner support, first owing to eliminating most of inner support, the workload of the workload of support and column is reduced greatly, and then decrease the workload of removing and supporting, certainly also shorten the duration, reduce cost; Secondly because pre-loaded support struts of the present invention only arranges do not have inner support in the middle part of foundation ditch along the surrounding of foundation ditch, this just makes the convenience become of cutting the earth; Also have owing to present invention employs prestressed structure, the distortion of supporting and protection structure is reduced.
Accompanying drawing explanation
Fig. 1 is foundation ditch pre-loaded support struts floor map.
Fig. 2 is that pre-loaded support struts supports with angle the floor map combined.
Fig. 3 is the floor map that pre-loaded support struts combines with buttress.
Fig. 4 be pre-loaded support struts with to supportting the floor map combined.
Fig. 5 is for ensureing part jack and top relation schematic diagram.
Have in figure: prestressed cable 1, ground tackle 2, support bar 3, built-in fitting 4, coupling beam 5, jack 6, top 7, ensure part 8, side bar 9, keep off native sealing campshed 10, column 11, buttress 12, to support 13, angle brace 14.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, technical scheme of the present invention is described in further details.
Pre-loaded support struts for foundation ditch of the present invention comprises: the gear soil sealing campshed 10 arranged along foundation ditch, along the side bar 9 that the native sealing campshed 10 of described gear is arranged, along at least one supporting component that described side bar 9 is arranged, the prestressed cable 1 that arrange corresponding to each supporting component, described supporting component comprises column 11, and the support bar 3 that be consolidated orthogonal with column 11, connect the coupling beam 5 of adjacent supports bar 3, one end of support bar 3 is connected with side bar 9, the prestressed cable 1 corresponding with supporting component is across supporting component and be connected with its end be positioned at inside foundation ditch, the two ends of prestressed cable 1 are connected on side bar 9, and be applied with prestressing force.
The end of described support bar 3 is provided with the built-in fitting 4 of the jack 6 installing stretch-draw prestressing force rope 1, also described built-in fitting 4 place is provided with the guarantee part 8 supporting prestressed cable 1, the effect of guarantee part 8 is after stretch-draw terminates, and withstands prestressed cable, ensure safety with guarantee part 8.The two ends of prestressed cable 1 are anchored on side bar 9.The shape of described support bar 3 has " 1 " font, " Y " font, " wood " font.
Two ends and ground tackle 2 anchor connection be arranged on side bar 9 of described prestressed cable 1, described side bar 9 closes on the pedestal that ground tackle 2 place is provided with to install the jack 6 of stretch-draw prestressing force rope 1.
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, described supporting component is multiple, the side bar 9 between two adjacent supporting components is provided with the buttress 12 being attached thereto and connecing or to support 13.
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, the knuckle place of described side bar 9 is provided with angle brace 14.
In the preferred embodiments of the present invention, each column can be connect single support bar 3, also can be connect multiple from top to bottom successively, the equal correspondence in end of each support bar 3 be provided with prestressed cable 1.
The concrete steps that the present invention is used for the construction method of the pre-loaded support struts of foundation ditch are:
1) the construction native sealing campshed 10 of gear and column 11, if be designed with buttress 12, then buttress 12 of simultaneously constructing;
2) earth excavation is high to the stake top mark keeping off native sealing campshed 10, and construction side bar 9, support bar 3 and coupling beam 5, if be designed with angle brace 14, to support 13, then construct in the lump, put into the precalculated position of design by prestressed cable 1 and tensioning equipment during construction;
3) start tensioning equipment, carry out prestressed stretch-draw, lock prestressed cable 1 to keep its stretching force after stretch-draw to designing requirement, the method for locking adopts ground tackle, or squeezes into gad between guarantee part and top;
4) by above-mentioned steps 2)-3) continue to construct downwards, until the prestressed cable 1 of constructed whole supporting component and correspondence thereof.
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, described step 2) in tensioning equipment be the jack 6 being arranged on support bar 3 end, be attached to the ground tackle 2 on side bar 9, the two ends of prestressed cable 1 are anchored on ground tackle 2;
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, in described step 3), start jack 6 after being placed on top 7 between jack 6 and prestressed cable 1 and carry out stretch-draw, after completing stretch-draw, to ensure that part 8 is placed with jack 6 is parallel, and clamp between top 7 and guarantee part 8 with gad, remove jack after locking stretching force.
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, described step 2) in tensioning equipment be the jack (6) being arranged on side bar 9 and being connected with the two ends of prestressed cable 1, side bar 9 is provided with the ground tackle 2 in order to anchoring prestress rope 1 two ends;
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, in described step 3), carry out stretch-draw at the two ends jack 6 of prestressed cable 1, after completing stretch-draw, with ground tackle 2, prestressed cable 1 anchoring is lived, after locking stretching force, remove jack 6.
Of the present invention in foundation ditch pre-loaded support struts preferred embodiment, if each column 11 connects multiple support bar 3 from top to bottom in design scheme, then step 2) and 3) in, first the construction support bar 3 of one deck and the prestressed cable 1 of correspondence thereof topmost, then successively construct downwards all the other support bars 3 and corresponding prestressed cable 1 thereof.
Claims (10)
1. the pre-loaded support struts for foundation ditch, it is characterized in that, this pre-loaded support struts comprises gear soil sealing campshed (10) arranged along foundation ditch, along the side bar (9) that the native sealing campshed (10) of described gear is arranged, along at least one supporting component that described side bar (9) is arranged, the prestressed cable (1) that arrange corresponding to each supporting component, described supporting component comprises column (11), and the support bar that be consolidated (3) orthogonal with column (11), connect the coupling beam (5) of horizontal adjacent supports bar (3), one end of described support bar (3) is connected with side bar (9), the prestressed cable (1) corresponding with supporting component is across supporting component and be connected with the end that support bar (3) is positioned at inside foundation ditch, the two ends of prestressed cable (1) are connected on side bar (9), and be applied with prestressing force.
2. the pre-loaded support struts for foundation ditch according to claim 1, it is characterized in that, the end of described support bar (3) is provided with the built-in fitting (4) of the jack (6) installing stretch-draw prestressing force rope (1), also described built-in fitting (4) place is provided with the guarantee part (8) supporting prestressed cable (1), the two ends of prestressed cable (1) are anchored on side bar (9).
3. the pre-loaded support struts for foundation ditch according to claim 1, it is characterized in that, two ends and ground tackle (2) anchor connection be arranged on side bar (9) of described prestressed cable (1), described side bar (9) closes on the pedestal that ground tackle (2) place is provided with to install the jack (6) of stretch-draw prestressing force rope (1).
4. the pre-loaded support struts for foundation ditch according to claim 1,2 or 3, is characterized in that, described supporting component is multiple, the side bar (9) between two adjacent supporting components is provided with the buttress (12) being attached thereto and connecing or to support (13).
5. the pre-loaded support struts for foundation ditch according to claim 1,2 or 3, is characterized in that, the knuckle place of described side bar (9) is provided with angle brace (14).
6. the pre-loaded support struts for foundation ditch according to claim 1,2 or 3, it is characterized in that, in described supporting component, each column (11) connects multiple support bar (3) from top to bottom, and the equal correspondence in end of each support bar (3) is provided with prestressed cable (1).
7. build the construction method for the pre-loaded support struts of foundation ditch described in claim 1,2,3,4,5 or 6, it is characterized in that, the concrete steps of the method are:
1) the construction native sealing campshed (10) of gear and column (11), if be designed with buttress (12), then buttress (12) of simultaneously constructing;
2) earth excavation is high to the stake top mark keeping off native sealing campshed (10), construction side bar (9), support bar (3) and coupling beam (5), if be designed with angle brace (14), to support (13), then construct in the lump, during construction, prestressed cable (1) and tensioning equipment are put into the precalculated position of design;
3) start tensioning equipment, carry out prestressed stretch-draw, lock prestressed cable (1) after stretch-draw to designing requirement to keep its stretching force;
4) by above-mentioned steps 2)-3) continue construction, until the prestressed cable (1) of constructed whole supporting component and correspondence thereof.
8. build the construction method of the pre-loaded support struts being used for foundation ditch according to claim 7, it is characterized in that, described step 2) in tensioning equipment for being arranged on the jack (6) of support bar (3) end, described side bar (9) is provided with ground tackle (2), the two ends of prestressed cable (1) are anchored on ground tackle (2);
In described step 3), (7) will be come directly towards be placed on and start jack (6) after between jack (6) and prestressed cable (1) and carry out stretch-draw, after completing stretch-draw, to ensure that part (8) and jack (6) are parallel to place, and clamp between top (7) and guarantee part (8) with gad, remove jack after locking stretching force.
9. build the construction method of the pre-loaded support struts being used for foundation ditch according to claim 7, it is characterized in that, described step 2) in tensioning equipment for being arranged on the upper and jack (6) be connected with the two ends of prestressed cable (1) of side bar (9), side bar (9) is provided with the ground tackle (2) in order to anchoring prestress rope (1) two ends;
In described step 3), carry out stretch-draw at the two ends jack (6) of prestressed cable (1), after completing stretch-draw, with ground tackle (2), prestressed cable (1) anchoring is lived, after locking stretching force, remove jack (6).
10. according to claim 7,8 or 9, build the construction method of the pre-loaded support struts being used for foundation ditch, it is characterized in that, if each column (11) connects multiple support bar (3) from top to bottom in design scheme, then described step 2) and 3) in, first the construction support bar (3) of one deck and the prestressed cable (1) of correspondence thereof topmost, then successively construct downwards all the other support bars (3) and corresponding prestressed cable (1) thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695643.2A CN104452775B (en) | 2014-11-26 | 2014-11-26 | Pre-loaded support struts and construction method for foundation ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695643.2A CN104452775B (en) | 2014-11-26 | 2014-11-26 | Pre-loaded support struts and construction method for foundation ditch |
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| Publication Number | Publication Date |
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| CN104452775A true CN104452775A (en) | 2015-03-25 |
| CN104452775B CN104452775B (en) | 2016-08-24 |
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| CN201410695643.2A Active CN104452775B (en) | 2014-11-26 | 2014-11-26 | Pre-loaded support struts and construction method for foundation ditch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499175A (en) * | 2017-01-04 | 2017-03-15 | 中冶建工集团有限公司 | A kind of self-locking steel twisted wire pours bracing frame and its installation and application |
| CN106522555A (en) * | 2017-01-04 | 2017-03-22 | 中冶建工集团有限公司 | Pre-locking type steel strand pouring supporting frame and installation and use method thereof |
| CN109838087A (en) * | 2019-04-02 | 2019-06-04 | 丁怡 | Reusable assembled architecture support device |
| CN109958136A (en) * | 2019-04-28 | 2019-07-02 | 安徽永昊建设工程有限公司 | The lattice column support system and its construction method of implementable prestressing force compensation |
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| WO2007058464A1 (en) * | 2005-11-16 | 2007-05-24 | Supportec Co., Ltd. | Temporary soil sheathing apparatus |
| KR20090101985A (en) * | 2008-03-25 | 2009-09-30 | 문원태 | Self-supporting retaining wall of steel truss |
| CN103967023A (en) * | 2014-05-28 | 2014-08-06 | 德清鑫德机械有限公司 | Support structure for long sides of strip rectangular foundation ditch |
| CN203821400U (en) * | 2014-05-22 | 2014-09-10 | 无锡市大筑岩土技术有限公司 | Prestressing force supporting structure of foundation pit |
| CN204282371U (en) * | 2014-11-26 | 2015-04-22 | 江苏鸿基科技有限公司 | A kind of pre-loaded support struts for foundation ditch |
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2014
- 2014-11-26 CN CN201410695643.2A patent/CN104452775B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007058464A1 (en) * | 2005-11-16 | 2007-05-24 | Supportec Co., Ltd. | Temporary soil sheathing apparatus |
| CN101310079A (en) * | 2005-11-16 | 2008-11-19 | 斯博泰科有限公司 | Temporary soil sheathing apparatus |
| KR20090101985A (en) * | 2008-03-25 | 2009-09-30 | 문원태 | Self-supporting retaining wall of steel truss |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499175A (en) * | 2017-01-04 | 2017-03-15 | 中冶建工集团有限公司 | A kind of self-locking steel twisted wire pours bracing frame and its installation and application |
| CN106522555A (en) * | 2017-01-04 | 2017-03-22 | 中冶建工集团有限公司 | Pre-locking type steel strand pouring supporting frame and installation and use method thereof |
| CN109838087A (en) * | 2019-04-02 | 2019-06-04 | 丁怡 | Reusable assembled architecture support device |
| CN109958136A (en) * | 2019-04-28 | 2019-07-02 | 安徽永昊建设工程有限公司 | The lattice column support system and its construction method of implementable prestressing force compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104452775B (en) | 2016-08-24 |
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Address after: 210032, No. 9, No. 11, Spark Road, Nanjing hi tech Development Zone, Pukou District, Jiangsu, Patentee after: JIANGSU HONGJI ENERGY SAVING NEW TECHNOLOGY CO., LTD. Address before: 210038 Jiangsu Province, Nanjing City Lake Garden 16 building 401 Patentee before: Jiangsu Hongji Technology Co., Ltd. |