CN103374916B - Pre-pressure steel arch foundation pit supporting construction - Google Patents
Pre-pressure steel arch foundation pit supporting construction Download PDFInfo
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- CN103374916B CN103374916B CN201310335655.XA CN201310335655A CN103374916B CN 103374916 B CN103374916 B CN 103374916B CN 201310335655 A CN201310335655 A CN 201310335655A CN 103374916 B CN103374916 B CN 103374916B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a kind of pre-pressure steel arch foundation pit supporting construction, it comprises an outer chord member, and the two ends of outer chord member are respectively fixedly connected with a heavy frame, the bottom multiple perpendicular web member of fixed installation of outer chord member and diagonal web member; Multiple interior chord member is fixedly connected sequentially, and is fixedly connected with the other end of diagonal web member with all perpendicular web members, and stiffening rib is installed in junction; Perpendicular web member encircles with the precompression being broken line arch and is fixedly connected with; Precompression is fixedly connected with vertical supporting column; Jack is installed in one end of precompression arch; Pass through jack; precompression is made to encircle interior generation pressure; the anti-steel truss pushing away outside and be made up of outer chord member, perpendicular web member, diagonal web member and interior chord member; steel truss is made to produce reversal deformation; the internal force produced under offsetting steel truss lateral earth pressure effect outside; the distortion of foundation pit walls is occurred hardly or only occurs a small amount of distortion, thus the stability in protection surrounding buildings place.The present invention has good stability, detachably, is convenient to transport, reusable feature.
Description
Technical field
The present invention relates to building foundation engineering technical field, particularly relate to a kind of pre-pressure steel arch foundation pit supporting construction (Prestressed Arched Structures is called for short PAS).
Background technology
Along with the development of urbanization, highrise building gets more and more, and wants the demand in space more and more stronger to underground.Multiple material handling method of deep foundation pit becomes a fast-developing field.Base hole supporting technology determines speed and the cost of basis and basement construction.The demand of reality is: Base hole supporting technology not only to protect the safety of existing building around and place, road stable; also want can be that accessible construction space large is as far as possible created in the basis of proposed building and the construction of basement, the building machinery being convenient to enter foundation ditch can carry out construction operation freely simultaneously.
Pre-pressure steel arch foundation pit supporting construction is foundation ditch and deep foundation pit support effective technology, precompression arch make foundation pit walls produce reverse distortion, make foundation pit walls not occur inside inclination, protection Adjacent Buildings basis and road, place stablize.It is applicable to shallow foundation hole and deep foundation ditch, is applicable to various foundation soil, the pattern foundation pit supporting structure of especially various clay foundation.
The object of precompression arch is set, by applying precompression, special steel truss is made to produce towards the distortion in foundation pit walls direction, the power that precompression produces in each component of special steel truss, the internal force that the soil pressure be applied on special steel truss with foundation pit walls produces, cancels out each other, which reduces the internal force of each rod member of special steel truss, the span that steel truss is suitable for increases, and substantially increases the area of clear area in foundation ditch.
Other support technologies, such as campshed, underground concrete diaphragm wall, the applicable degree of depth is limited, and cost is high, and speed is slow, reverse construction, and not only speed is slow, and the space that can be supplied to building machinery is also very little.Therefore in the urgent need to new long strands.
In order to make above-mentionedly to bear vertical load as small as possible with the matching used lateral resistant member of steel work, often require that these components are installed to top in total, most vertical load has all put in place to be delivered to after on pillar, then turn back these lateral resistant member are installed.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of pre-pressure steel arch foundation pit supporting construction is provided.
The object of the invention is to be achieved through the following technical solutions: a kind of pre-pressure steel arch foundation pit supporting construction, it comprises outer chord member, perpendicular web member, diagonal web member, interior chord member, the first pressure-bearing bracket, precompression arch, the second pressure-bearing bracket, vertical support column and heavy frame etc.; The two ends of outer chord member are respectively fixedly connected with a heavy frame, the bottom multiple perpendicular web member of fixed installation of outer chord member and diagonal web member; Multiple interior chord member is fixedly connected sequentially, and in broken line arch, and is fixedly connected with the other end of diagonal web member with all perpendicular web members, and stiffening rib is installed in junction.Perpendicular web member to be encircleed with the precompression being broken line arch by perpendicular web member end plate and is fixedly connected with; Precompression arch is fixedly connected with vertical supporting column by vertical support upright post connecting plate; One end of precompression arch is fixedly connected with the first pressure-bearing bracket, and the first pressure-bearing bracket is arranged on the heavy frame of outer chord member side.The other end of precompression arch installs jack, and overlap joint lintel is installed at the upper and lower position of jack.The other end of jack is fixedly connected with the second pressure-bearing bracket, and the second pressure-bearing bracket is arranged on the heavy frame of outer chord member opposite side.
The beneficial effect that the present invention compared with prior art has:
1, because adopt special steel truss with bolts, can reuse, disposable input, according to a preliminary estimate can up to a hundred times of repeated application, significant cost reduces.
2, adopt precompression arch, special steel truss applied and the reverse pressure of soil pressure, makes the stressed reduction of truss, be suitable for span and increase, based on and the construction of basement create larger clear space.
3, adopt steel work, installing at once can be stressed, can save the plenty of time, accelerating construction progress compared with concrete supporting structure.
4, power steel precompressed skewback pit supporting construction of the present invention, has good stability, detachably, is convenient to transport, reusable feature.
Accompanying drawing explanation
Fig. 1 is the structural representation of pre-pressure steel arch foundation pit supporting construction of the present invention.
Fig. 2 is the a-quadrant enlarged drawing of Fig. 1;
Fig. 3 is the B regional enlarged drawing of Fig. 1;
Fig. 4 is the C regional enlarged drawing of Fig. 1;
Fig. 5 is the D regional enlarged drawing of Fig. 1;
Fig. 6 is the E regional enlarged drawing of Fig. 1;
Fig. 7 is the A-A view of Fig. 1;
Fig. 8 is the B-B view of Fig. 1;
Fig. 9 is the F regional enlarged drawing of Fig. 8;
Figure 10 is the C-C view of Fig. 1;
Figure 11 is the D-D view of Fig. 3;
Figure 12 is the E-E view of Fig. 9;
Figure 13 is the F-F view of Fig. 9;
In figure, outer chord member 1, perpendicular web member 2, diagonal web member 3, interior chord member 4, first pressure-bearing bracket 5, stiffening rib 6, bolt 7, perpendicular web member end plate 8, horizontal slotted hole 9, precompression arch 10, bolt 11, vertical support upright post connecting plate 12, bolt 13, bolt 14, second pressure-bearing bracket 15, bolt 16, vertical supporting column 17, jack 18, overlap joint lintel 19, bolt 20, heavy frame 21.
Detailed description of the invention
As shown in figures 1-13, pre-pressure steel arch foundation pit supporting construction of the present invention comprises outer chord member 1, perpendicular web member 2, diagonal web member 3, interior chord member 4, first pressure-bearing bracket 5, precompression arch the 10, second pressure-bearing bracket 15, vertical support column 17 and heavy frame 21.The two ends of outer chord member 1 are respectively fixedly connected with a heavy frame 21, the bottom multiple perpendicular web member 2 of fixed installation of outer chord member 1 and diagonal web member 3; Multiple interior chord member 4 is fixedly connected sequentially, and in broken line arch, and is fixedly connected with the other end of diagonal web member 3 with perpendicular web member 2, and stiffening rib 6 is installed in junction.Erect the perpendicular web member end plate 8 of web member 2 welding edges, horizontal slotted hole 9 opened by perpendicular web member end plate 8.All perpendicular web member end plates 8 all encircle 10 with the precompression in broken line arch and are fixedly connected with.Precompression arch 10 is fixedly connected with vertical supporting column 17 by vertical support upright post connecting plate 12.One end of precompression arch 10 is fixedly connected with the first pressure-bearing bracket 5, first pressure-bearing bracket and is arranged on the heavy frame 21 of outer chord member 1 side.The other end of precompression arch 10 installs jack 18, and overlap joint lintel 19 is installed at jack about 18 position.The other end of jack 18 is fixedly connected with the second pressure-bearing bracket 15, second pressure-bearing bracket 15 and is arranged on the heavy frame 21 of outer chord member 1 opposite side.
The implementation step of pre-pressure steel arch foundation pit supporting construction of the present invention is as follows:
1, foundation ditch tentatively excavates certain degree of depth, for installing pre-pressure steel arch foundation pit supporting construction and peripheral frame vacating space;
2, heavy frame 21 and vertical support column 17 are installed,
3, outer chord member 1 is installed,
4, block-by-block installs chord member 4 in perpendicular web member 2, diagonal web member 3, fold-line-shaped.
5, precompression arch 10 is installed: be reliably connected with perpendicular web member 2 and vertical support column 17 by precompression arch 10;
6, jack 18 is installed; And arrange monitoring equipment.
7, utilize jack 18 to apply precompression, first preliminary pressure testing is to about 20% of design load, checks total, and reads monitored data, checks that whether data are normal.
8, apply precompression step by step, step by step reading, check, until the precompression of design code;
9, tighten the bolt pretension of all bolts to regulation, and the overlap joint lintel 19 at the upper and lower position of jack is installed.
10, jack 18 fuel tap is closed.And continue the pressure of monitoring jack sensor.
11, foundation ditch excacation can continue to carry out downwards, carries out after the degree of depth of design code, installs a new Pin precompression arch supporting and protection structure.Continue, until the foundation depth needed.
The present invention is by jack 18; precompression is encircleed in 10 and produces pressure; the anti-steel truss pushing away outside and be made up of outer chord member 1, perpendicular web member 2, diagonal web member 3 and interior chord member 4; steel truss is made to produce reversal deformation; the internal force produced under offsetting steel truss lateral earth pressure effect outside; the distortion of foundation pit walls is occurred hardly or only occurs a small amount of distortion, thus the stability in protection surrounding buildings place.
Claims (1)
1. a pre-pressure steel arch foundation pit supporting construction, is characterized in that, it comprises outer chord member, perpendicular web member, diagonal web member, interior chord member, the first pressure-bearing bracket, precompression arch, the second pressure-bearing bracket, vertical support column and heavy frame; The two ends of outer chord member are respectively fixedly connected with a heavy frame, the bottom multiple perpendicular web member of fixed installation of outer chord member and diagonal web member; Multiple interior chord member is fixedly connected sequentially, and in broken line arch, and is fixedly connected with the other end of diagonal web member with all perpendicular web members, and stiffening rib is installed in junction; Perpendicular web member to be encircleed with the precompression being broken line arch by perpendicular web member end plate and is fixedly connected with; Precompression arch is fixedly connected with vertical supporting column by vertical support upright post connecting plate; One end of precompression arch is fixedly connected with the first pressure-bearing bracket, and the first pressure-bearing bracket is arranged on the heavy frame of outer chord member side; The other end of precompression arch installs jack, and overlap joint lintel is installed at the upper and lower position of jack; The other end of jack is fixedly connected with the second pressure-bearing bracket, and the second pressure-bearing bracket is arranged on the heavy frame of outer chord member opposite side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310335655.XA CN103374916B (en) | 2013-08-05 | 2013-08-05 | Pre-pressure steel arch foundation pit supporting construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310335655.XA CN103374916B (en) | 2013-08-05 | 2013-08-05 | Pre-pressure steel arch foundation pit supporting construction |
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| CN103374916A CN103374916A (en) | 2013-10-30 |
| CN103374916B true CN103374916B (en) | 2015-08-12 |
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| CN111851519A (en) * | 2020-07-27 | 2020-10-30 | 广西大学 | Space truss multilayer internal support system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255697A (en) * | 2008-04-10 | 2008-09-03 | 王平 | Method for integrally applying prestress to truss-type inner support of deep foundation pit |
| CN101408024A (en) * | 2008-11-11 | 2009-04-15 | 广州市设计院 | Undercrossing subway tunnel pit supporting and protecting structure of high-rise building or super high-rise building |
| CN202157328U (en) * | 2011-07-11 | 2012-03-07 | 福建工大建筑设计院 | Steel truss type foundation pit supporting structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100543059B1 (en) * | 2004-07-26 | 2006-01-20 | (주)피에스테크 | A wale system for supporting earth retaining wall and construction method thereof |
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2013
- 2013-08-05 CN CN201310335655.XA patent/CN103374916B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255697A (en) * | 2008-04-10 | 2008-09-03 | 王平 | Method for integrally applying prestress to truss-type inner support of deep foundation pit |
| CN101408024A (en) * | 2008-11-11 | 2009-04-15 | 广州市设计院 | Undercrossing subway tunnel pit supporting and protecting structure of high-rise building or super high-rise building |
| CN202157328U (en) * | 2011-07-11 | 2012-03-07 | 福建工大建筑设计院 | Steel truss type foundation pit supporting structure |
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| CN103374916A (en) | 2013-10-30 |
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Address after: 310016 Room 1101, 6 Blocks, Chuangzhi Green Valley Development Center, Jianggan District, Hangzhou City, Zhejiang Province Co-patentee after: Zhejiang University Patentee after: Dongtong Geotechnical Technology Co., Ltd. Address before: 2, No. 1199, No. 310016, sailing Road, Hangzhou, Zhejiang, Jianggan District Co-patentee before: Zhejiang University Patentee before: Dongtong Geotechnical Technology (Hangzhou) Co., Ltd. |