CN103711131A - Ultra-soft soil large-area deep foundation pit guard post support changing method - Google Patents
Ultra-soft soil large-area deep foundation pit guard post support changing method Download PDFInfo
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- CN103711131A CN103711131A CN201310727817.4A CN201310727817A CN103711131A CN 103711131 A CN103711131 A CN 103711131A CN 201310727817 A CN201310727817 A CN 201310727817A CN 103711131 A CN103711131 A CN 103711131A
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Abstract
The invention provides an ultra-soft soil large-area deep foundation pit guard post support changing method, and belongs to the technical field of construction. The method includes the steps of firstly, welding and fixing steel corbels and an embedded board, fixedly connecting a fixed end, a middle rod and a movable end to form a supporting rod, and embedding and fixing the supporting rod between the corbels; secondly, connecting and fixing the two ends of each I-beam to end plates, and embedding and fixing the I-beams and the end plates to the two ends of rear pouring belts or the middle portion of a floor or the middle portion of a wall; thirdly, conducting construction of a first concrete belt after the first step and the second step are completed, and then conducting backfilling of graded sand and stone and construction of a second concrete belt; fourthly, detaching an inner support after the first step, the second step and the third step are completed; fifthly, repeatedly executing the steps to conduct support changing of corresponding floors if a plurality of inner supports are arranged on a guard post. The ultra-soft soil large-area deep foundation pit guard post support changing method has the advantages that the uniformity of force transmission of the graded sand and stone, the strength of the concrete structure and the advantages that the steel structure is high in splicing speed and high in efficiency are simultaneously used for conducting inner support change of foundation pit supporting, the influences of the inner supports on structure construction are eliminated, project quality is improved, and the operation is easy to conduct.
Description
Technical field
The invention belongs to technical field of building construction.
Background technology
At present, drill-pouring inner support of pile is that more a kind of combined supporting form is applied in China's Coastal Areas, particularly for the excavation of soft clay area large-area deep foundation pit, inner support system can be according to foundation ditch shape independent assortment, and can bring into play good pattern foundation pit supporting structure effect.But, inner support has a very large drawback, be that very large obstacle has been manufactured in the follow-up construction of existing for of inner support, before follow-up construction, must process inner support, make construction have to stop herein, form constuction joint, both affected the progress of construction, affected again the quality of construction.
Summary of the invention
The object of the invention is: a kind of ultra-soft soil property large-area deep foundation pit fender post support replacement method is provided, and it can realize the stressed conversion of fender post inner support and structure self, and simple to operate, easily capable.
Method of the present invention is:
1, steel corbel and buried plate are welded and fixed, fixed end, king-rod, movable end are connected and fixed from the flanged bolt that carries out by end, form strut, strut is mounted between bracket.
2, i iron two ends and end plate are welded to connect fixing, are then mounted in two ends, ater-casting, floor or body of wall middle part; Equipment box out place i iron span centre 1-4 root setting up and down reinforcing bar carry out cross-cut.
3, after above-mentioned " 1 ", " 2 " step complete, carry out the construction of first concrete belt, after it reaches concrete design strength, carry out the backfill of graded sand and stone and the construction of second concrete belt, the absolute altitude of concrete belt is identical with floor absolute altitude, and thickness is identical with slab thickness.
4, until above-mentioned " 1 ", " 2 ", " 3 " step complete and structure self concrete strength reach design strength 80% after, carry out the dismounting of inner support.
If 5 fender posts have multiple tracks inner support, can repeat the step of " 1 ", " 2 ", " 3 " " 4 " and carry out the support replacement of respective storey.
Steel pipe diagonal brace angle is between 40-50 °.
Adopt aggregate grading ratio to be:
Component title | Particle diameter (mm) | Content (%) |
Rubble | 2-15 | 30-40 |
Sand grains | 0.1-2 | 40-50 |
Powder | <0.1 | 10-20 |
The invention has the beneficial effects as follows: utilize the uniformity of graded sand and stone power transmission and the intensity of concrete structure itself, utilize the advantage that steel structure assembling speed is fast, efficiency is high to carry out the inner support conversion of pattern foundation pit supporting structure simultaneously, eliminated the impact of inner support on structure construction, improved workmanship, and operated simply, easily go.
Accompanying drawing explanation
Fig. 1 is support replacement layout plan of the present invention;
Fig. 2 is A-A sectional drawing of the present invention;
Fig. 3 is B-B sectional drawing of the present invention;
Fig. 4 is C-C sectional drawing of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in the figure, the 1st, steel corbel, the 2nd, fixed end, the 3rd, king-rod, the 4th, movable end, the 5th, buried plate, the 6th, concrete belt, the 7th, graded sand and stone, the 8th, i iron, the 9th, end plate, the 10th, reinforcing bar, the 11st, fender post, the 12nd, equipment boxes out, the 13rd, ater-casting, the 14th, B1, the 15th, underground two layers.
1, steel corbel 1 and buried plate 5 are welded and fixed, fixed end 2, king-rod 3, movable end 4 are carried out to bolt connection by end from flanged, form strut, strut is mounted between bracket.
2, i iron 8 two ends and end plate 9 are welded to connect, are then mounted in 13 two ends, ater-casting, floor or body of wall middle part; Box out span centre two reinforcing bars 10 setting up and down of 12 place's i iron 8 of equipment carry out cross-cut, guarantee the stable of i iron.
3, after " 1 ", " 2 " step complete, carry out the construction of first concrete belt 6, after it reaches concrete design strength, carry out the backfill of graded sand and stone 7 and the construction of second concrete belt 6, the absolute altitude of concrete belt 6 is identical with floor absolute altitude, the same slab thickness of thickness.
4, until " 1 ", " 2 ", " 3 " step complete and structure self concrete strength reach design strength 80% after, carry out the dismounting of inner support.
If 5 fender posts have multiple tracks inner support, can repeat the step of " 1 ", " 2 ", " 3 " " 4 " and carry out the support replacement of respective storey.
By said method, can successfully realize the stressed conversion of ultra-soft soil property large-area deep foundation pit fender post inner support and structure self.
Claims (3)
1. a ultra-soft soil property large-area deep foundation pit fender post support replacement method, its method is:
A, steel corbel and buried plate are welded and fixed, fixed end, king-rod, movable end are connected and fixed from the flanged bolt that carries out by end, form strut, strut is mounted between bracket;
B, i iron two ends and end plate are welded to connect fixing, are then mounted in two ends, ater-casting, floor or body of wall middle part; Equipment box out place i iron span centre 1-4 root setting up and down reinforcing bar carry out cross-cut;
C, after above-mentioned a, b step complete, carry out the construction of first concrete belt, after it reaches concrete design strength, carry out the backfill of graded sand and stone and the construction of second concrete belt, the absolute altitude of concrete belt is identical with floor absolute altitude, and thickness is identical with slab thickness;
D, until above-mentioned a, b, c step complete and structure self concrete strength reach design strength 80% after, carry out the dismounting of inner support;
If e fender post has multiple tracks inner support, the step that can repeat a, b, c, d is carried out the support replacement of respective storey.
2. a kind of ultra-soft soil property large-area deep foundation pit fender post support replacement method as claimed in claim 1, is characterized in that: steel pipe diagonal brace angle is between 40-50 °.
3. a kind of ultra-soft soil property large-area deep foundation pit fender post support replacement method as claimed in claim 1, is characterized in that:
Adopt aggregate grading ratio to be
The rubble of 2-15 mm is 30-40%;
The sand grains of 0.1-2 mm is 40-50%;
The powder of <0.1 mm be 10-20%.
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CN201310727817.4A CN103711131A (en) | 2013-12-26 | 2013-12-26 | Ultra-soft soil large-area deep foundation pit guard post support changing method |
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CN201310727817.4A CN103711131A (en) | 2013-12-26 | 2013-12-26 | Ultra-soft soil large-area deep foundation pit guard post support changing method |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105040709A (en) * | 2015-08-11 | 2015-11-11 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for support replacement of fender-post retaining and protecting of deep foundation pit |
CN105442613A (en) * | 2015-11-16 | 2016-03-30 | 广西建工集团第一建筑工程有限责任公司 | Fixing installation method for steel tube vertical inclined brace support pre-embedded steel plate and reinforcing cage |
CN105507329A (en) * | 2015-11-27 | 2016-04-20 | 中国一冶集团有限公司 | Support replacement system for base plates of foundation pit of mucky soil layer in deep foundation pit support construction |
CN107288137A (en) * | 2017-08-21 | 2017-10-24 | 中建八局浙江建设有限公司 | Detachable support replacement device and its construction method |
CN110185043A (en) * | 2019-06-14 | 2019-08-30 | 中国十七冶集团有限公司 | A kind of deep foundation pit support inner support support replacement method |
CN110318403A (en) * | 2019-07-15 | 2019-10-11 | 重庆建工第七建筑工程有限责任公司 | A kind of deep basal pit inner support assembled support replacement construction tool and construction method |
CN114411757A (en) * | 2022-02-08 | 2022-04-29 | 中建八局南方建设有限公司 | Early-dismantling construction method for inner support partition of deep foundation pit |
CN115012428A (en) * | 2022-06-22 | 2022-09-06 | 中国二十二冶集团有限公司 | Basement deep foundation pit replacing support and construction method thereof |
CN115559323A (en) * | 2022-11-11 | 2023-01-03 | 中交第一航务工程局有限公司 | Construction method for conversion of deep foundation pit supporting system |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105040709A (en) * | 2015-08-11 | 2015-11-11 | 中铁建大桥工程局集团第五工程有限公司 | Construction method for support replacement of fender-post retaining and protecting of deep foundation pit |
CN105442613A (en) * | 2015-11-16 | 2016-03-30 | 广西建工集团第一建筑工程有限责任公司 | Fixing installation method for steel tube vertical inclined brace support pre-embedded steel plate and reinforcing cage |
CN105507329A (en) * | 2015-11-27 | 2016-04-20 | 中国一冶集团有限公司 | Support replacement system for base plates of foundation pit of mucky soil layer in deep foundation pit support construction |
CN107288137A (en) * | 2017-08-21 | 2017-10-24 | 中建八局浙江建设有限公司 | Detachable support replacement device and its construction method |
CN107288137B (en) * | 2017-08-21 | 2019-05-17 | 中建八局浙江建设有限公司 | Detachable support replacement device and its construction method |
CN110185043A (en) * | 2019-06-14 | 2019-08-30 | 中国十七冶集团有限公司 | A kind of deep foundation pit support inner support support replacement method |
CN110318403A (en) * | 2019-07-15 | 2019-10-11 | 重庆建工第七建筑工程有限责任公司 | A kind of deep basal pit inner support assembled support replacement construction tool and construction method |
CN114411757A (en) * | 2022-02-08 | 2022-04-29 | 中建八局南方建设有限公司 | Early-dismantling construction method for inner support partition of deep foundation pit |
CN115012428A (en) * | 2022-06-22 | 2022-09-06 | 中国二十二冶集团有限公司 | Basement deep foundation pit replacing support and construction method thereof |
CN115559323A (en) * | 2022-11-11 | 2023-01-03 | 中交第一航务工程局有限公司 | Construction method for conversion of deep foundation pit supporting system |
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Application publication date: 20140409 |