CN1982546A - Direct local skirt border reversing construction for central island - Google Patents

Direct local skirt border reversing construction for central island Download PDF

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Publication number
CN1982546A
CN1982546A CN 200510111393 CN200510111393A CN1982546A CN 1982546 A CN1982546 A CN 1982546A CN 200510111393 CN200510111393 CN 200510111393 CN 200510111393 A CN200510111393 A CN 200510111393A CN 1982546 A CN1982546 A CN 1982546A
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CN
China
Prior art keywords
plate
foundation ditch
construction
periphery
basin
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Pending
Application number
CN 200510111393
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Chinese (zh)
Inventor
王美华
粱其家
季方
方刚
陆纪东
陈辉
尤雪春
陶金
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Shanghai No 7 Construction Co Ltd
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Shanghai No 7 Construction Co Ltd
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Publication date
Application filed by Shanghai No 7 Construction Co Ltd filed Critical Shanghai No 7 Construction Co Ltd
Priority to CN 200510111393 priority Critical patent/CN1982546A/en
Publication of CN1982546A publication Critical patent/CN1982546A/en
Pending legal-status Critical Current

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Abstract

A job practice of which center island is done in sequence and partial skirts done inversely, comprising the following steps : set up exterior-protected construction, purlin and steel upright columns around the foundation ditch; dig on basin pattern for the first time to the depths to structural plane of purlin, earthwork are unified dig beneath the designed to the surrounding medium plate in the foundation ditch, pour the surrounding medium plate; dig for the second time with basin pattern downwards from the position of foundation ditch medium plate to the bottom of the designed foundation ditch, pour the center island plate; after the center island plate meets the maintenance time request of plate, construct in sequence to close the medium plate, setting fetching holes; then use medium plate for support system, construct criss-cross structural upper plate and plates in inverse zones. This construction method is convenient, save labor force and resources, improves the progress of the project, shorten the construction period.

Description

The central island direct local skirt border reversing construction
Technical field
The present invention relates to the semi-inverse method construction technology in the construction at present, especially a kind of job practices of central island direct local skirt border reversing.
Background technology
The contrary sequence method that is risen the eighties in 20th century be exactly around to go along with sb. to guard him be after diaphragm wall is carried out, excavate one section earthwork downwards, adopt false bracket method that this section carried out building of concrete structure then, carry out job practices more successively downwards until the bottom.In top-down work progress, because native face is mild, the native face absolute altitude under the structure is general to be consistent with structure beam slab bottom surface, promptly utilizes the mode of native fetal membrane each layer structure of constructing, and need not to install the framed bent support.
This traditional job practices generally is used for building construction more, and the basement floor height is generally not high, and the foundation ditch area is less, generally at 6000m 2About, when constructing, at first carry out the fetch earth layout at hole of reverse construction according to the form of structure of the building first floor, the hole area that generally fetches earth is less, and hole quantity is also less, and this has just caused the distance between the hole bigger, be about 60~70m, underground cubic metre of earth tunneling excavation amount is bigger when therefore causing construction, and cubic metre of earth secondary transportation by lighter amount is also bigger, and programming is slow.And this excavation structure is unfavorable for natural ventilation, generally speaking, needs to use a plurality of exhaust blowers, and will set up special-purpose ventilation system, and this has just reduced limited construction operation space, makes troubles to whole construction course, has directly increased engineering cost.
So bigger for some foundation ditch areas, digging depth is darker, and concerning Deformation control and architecture quality require high, floor height changes greatly, the unearthed engineering that rate request is fast, construction speed is tight, traditional top-down method construction process can not be suitable for.
Summary of the invention
The objective of the invention is deficiency at existing top-down construction method, a kind of job practices of central island direct local skirt border reversing is provided, this job practices has overcome the deficiency of existing job practices, and it is big relatively to be suitable for the foundation ditch area, and the construction plant is openr, can excavate the large-scale construction engineering that unloads soil and interim stacking spoir at the foundation ditch periphery, especially be fit to the construction on large-scale square, because easy construction uses manpower and material resources sparingly, improve the progress of engineering, shortened the duration.
The job practices of central island direct local skirt border reversing provided by the present invention, its basic step is as follows:
1. space enclosing structure is set around the foundation ditch of needs construction and encloses purlin, and set steel post;
2. carry out first time basin excavation at the foundation ditch periphery and unload soil, cutting depth reaches encloses the purlin structural plane, in foundation ditch, below cubic metre of earth unified position of digging plate to the periphery, shoveling face height between the plate to the periphery should guarantee in build 100mm hassock layer and framed bent, template is set up required height, builds plate in the periphery.
3. treat (to form the annular brace system) after plate intensity reaches 100% in the periphery, carry out the soil excavation second time, Board position begins to adopt basin excavation downwards from foundation ditch, digs to the foundation ditch design bottom, with after-pouring central island base plate.
4. after treating that the construction of central island bottom slab concreting finishes, reach the requirement of bottom board concrete curing time,, reserve the suitable hole of fetching earth simultaneously along making plate in the construction sealing.
5. middle plate construction finishes, and plate intensity reaches after the design strength in treating, plate is made support system in the utilization, according to the principle of symmetry, subregion, balance, and structure roof and contrary district's base plate crossed construction simultaneously of doing.
After above-mentioned construction finishes, backfill hole Zhou Tuti and structure roof earthing.
Above-mentioned job practices adopts during basin excavation secondary to put the slope in the step 2, basin side slope degree is 1: 2~2.5, at the bottom of the basin to the horizontal range 10m between the space enclosing structure.
Above-mentioned job practices during basin excavation, is provided with the 7m width at the foundation ditch inner side edge and stays native platform in the step 3, puts the slope with 1: 2~2.5 gradients.
Owing to adopted technique scheme, traditional handicraft the present invention of the full-reverse method of comparing has following characteristics and advantage:
1, semi-inverse method adopts two bright one dark construction technologies, and promptly central island base plate, middle plate, top board are suitable the construction, and peripheral base plate is an adverse construction method.Put for the first time slope unloading shoveling employing cut and cover method, the central island basin excavation adopts cut and cover method for the second time, and periphery is cut the earth against the work district and adopted hidden construction process for the third time.The benzvalene form open cut can reduce the distortion of foundation ditch diaphragm wall on the one hand, guarantees foundation ditch safety; Can increase the open cut earth volume on the other hand as far as possible, thereby reduce the soil excavation cost.
2, cut the earth and be different from the full-reverse shoveling in the contrary work of semi-inverse method district, semi-inverse method central island base plate is that construction finishes earlier, when cut the earth in contrary work district, little digging machine is arranged in the zone of cutting the earth, can consider simultaneously that putting into several small-sized cubic metre of earth of cars at the central island base plate is used for the contrary district's cubic metre of earth transportation of doing, the earthwork is transported to the unearthed hole of a fixed point, the earthwork is dug out entrucks and carries away by being parked in digging machine on the top board again.
Comparatively speaking, the advantage of this shoveling method is: need not stay on top board and establish many unearthed holes, can improve the integral rigidity of top board so on the one hand, the constuction joint infiltration phenomenon that may cause when being unearthed the hole sealing after can avoiding on the one hand in addition; Improve shoveling efficient, accelerating construction progress reduces owing to increasing the soil excavation cost that the transportation by lighter digging machine produces.
3, owing to adopt cut and cover method substantially, the full-reverse method is constructed relatively, and on-the-spot ventilation condition is better, and simultaneously, middle plate, top board construction progress, construction quality can be guaranteed.
4, after adopting the semi-inverse method construction technology, the expense of going along with sb. to guard him is saved greatly; Foundation ditch periphery cubic metre of earth adopts to be put after the unloading of slope, and space enclosing structure can integral body falls lowly, and foundation ditch does not support from top to bottom together, and under the situation of guaranteeing duration and foundation ditch safety, plate is as the foundation ditch support system in the structure.
Description of drawings
Fig. 1 is a construction sequence schematic diagram one of the present invention
Fig. 2 is a construction sequence schematic diagram two of the present invention
Fig. 3 is a construction sequence schematic diagram three of the present invention
Fig. 4 is a construction sequence schematic diagram four of the present invention
The specific embodiment
Below in conjunction with accompanying drawing the present invention is made a detailed explanation: the job practices of central island direct local skirt border reversing provided by the present invention, its basic step is as follows:
1. space enclosing structure 1 is set around the foundation ditch of needs construction and encloses purlin 2, and set steel post 3;
2. carry out first time basin excavation at the foundation ditch periphery and unload soil, cutting depth reaches encloses purlin 2 structural planes, adopts secondary to put the slope, and basin limit 4 gradients are generally 1: 2~2.5, and 5 are generally less than 10m to the horizontal range between the space enclosing structure 1 at the bottom of the basin.In foundation ditch, below cubic metre of earth unified position of digging plate 7 to the periphery of design, the height between the position of shoveling face 6 plate 7 to the periphery of design should guarantee in build 100mm hassock layer and framed bent, template is set up required height, builds plate 7 in the periphery.
3. treat (to form the annular brace system) after plate 7 intensity reach 100% in the periphery, carry out the soil excavation second time, Board position begins to adopt basin excavation downwards from foundation ditch, digs to foundation ditch design bottom 12, with after-pouring central island base plate 8.During excavation, at the foundation ditch inner side edge 7m width is set and stays native platform, put the slope with 1: 2.5 gradient.
4. after treating that central island base plate 8 pouring constructions finish, reach the requirement of bottom board concrete curing time,, reserve the suitable hole of fetching earth simultaneously along making plate 9 in the construction sealing.
5. middle plate 9 constructions finish, and plate 9 intensity reach after the design strength in treating, plate 9 is made support system in the utilization, according to the principle of symmetry, subregion, balance, and structure roof 10 and contrary district's base plate 11 crossed construction simultaneously of doing.
After above-mentioned construction finishes, backfill hole Zhou Tuti and structure roof earthing.
Embodiment
Certain engineering, the foundation ditch area is big, reaches 35000m 2, the degree of depth reaches 13.4M, and relates to little artesian aquifer.
Underground garage, market foundation pit enclosure structure are selected diaphragm wall under the 800mm heavy back for use, and the continuous wall section adopts the flexible joint of fore shaft pipe.Diaphragm wall double as agent structure side wall was established liner no longer in addition after excavation of foundation pit finished in the hole, and wall width of cloth seam crossing is provided with pilaster.
This engineering construction place is open, possess at the foundation ditch periphery and excavate the site condition of unloading soil and interim stacking spoir, for minimizing acts on water and soil pressure on the space enclosing structure, consideration diaphragm wall build finish after, excavate in advance at the foundation ditch periphery and to unload soil, wherein native degree of depth 6.8m is unloaded in the foundation ditch north side, unload native berm width 〉=15m, remainder unloads native degree of depth 5.0m, unloads big of native berm width and is 10.0m, local 6.4m.
Unload the soil phase with the foundation ditch periphery and combine, this engineering adopts the bracing of foundation pit scheme of " central island worker's method combines with Partial Inverse ".After periphery is put slope excavation and is finished, build the diaphragm wall top beam, the interior soil body in excavation hole is to relative elevation-10.68 then, build periphery one~two span centre plated construction earlier, at the foundation ditch inner side edge 10.0m width is set and stays native platform, design end elevation with 1: 2.5 gradient basin excavation foundation ditch middle part soil body to foundation ditch, then along making this part base plate, middle plate; Cast-in-place diaphragm wall under the highland, the suitable top board beam column of finishing of connecing.After treating that top board reaches design strength, plate supports in the utilization, according to the principle of symmetry, subregion, balance, the contrary excavation pit inner side edge of doing that leapfrogs at interval stays native platform and stays the slope to cheating at the end (relative elevation-15.38m), in time piecemeal, contrary plain concrete bed course and base plate and the column of building of subregion.Backfill hole Zhou Tuti and top board earthing.
Originally go along with sb. to guard him design scheme and be chosen at that the hole is outer unloads soil in advance, need build and the environmental protection condition, unload the native degree of depth 5.0 according to the foundation ditch periphery.Put the gradient 1: 2.5, the slope is put in the big portion in the foundation ditch outside also branch two-stage, the high 1.50m in first order slope, and the centre is provided with that 1.50m is wide to stay native platform, the sloping high 3.50m in the second level, toe is put to relative elevation-7.00, and toe is to the native berm width 10.0m of staying of diaphragm wall inner edge.

Claims (3)

1. the job practices of a central island direct local skirt border reversing is characterized in that comprising the steps:
(a) around the foundation ditch of needs construction, space enclosing structure is set and encloses purlin, and set steel post;
(b) carry out first time basin excavation at the foundation ditch periphery and unload soil, cutting depth reaches encloses the purlin structural plane, in foundation ditch, below cubic metre of earth unified position of digging plate to the periphery, height in shoveling face and the periphery between the plate should satisfy builds 100mm hassock layer and framed bent, template are set up required height, builds plate in the periphery;
(c) plate intensity reaches after 100% in the periphery, carries out the soil excavation second time, and Board position begins to adopt basin excavation downwards from foundation ditch, digs to the foundation ditch design bottom, builds the central island base plate;
(d) the central island base plate reaches after the requirement of bottom board concrete curing time, along making plate in the construction sealing, reserves the hole of fetching earth simultaneously;
(e) plate intensity reaches after the design strength in, and plate is made support system in the utilization, crossed construction structure roof and the contrary district's base plate of doing.
2. job practices according to claim 1, basin side slope degree is 1: 2~2.5 when it is characterized in that in the step (b) basin excavation, at the bottom of the basin to the horizontal range between the space enclosing structure less than 10m.
3. job practices according to claim 1 when it is characterized in that excavating in the step (c), is provided with the 7m width at the foundation ditch inner side edge and stays native platform, puts the slope with 1: 2~2.5 gradients.
CN 200510111393 2005-12-12 2005-12-12 Direct local skirt border reversing construction for central island Pending CN1982546A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418571A (en) * 2008-10-15 2009-04-29 上海市第二市政工程有限公司 Middle plate construction method of wide pit top-down construction
CN101408025B (en) * 2008-11-11 2011-06-01 广州市设计院 Pit construction method by using major structure as bearing point
CN101705685B (en) * 2009-11-06 2011-12-28 上海市第一建筑有限公司 Stepped top-down construction method for peripheral beam slabs of underground structure
CN102383433A (en) * 2011-08-22 2012-03-21 同济大学建筑设计研究院(集团)有限公司 Design method for large deep foundation pit of super high-rise building
CN102704495A (en) * 2012-07-02 2012-10-03 上海建工集团股份有限公司 Island-basin combination excavation method for consequent operation of a major-diameter round no-inner support deep foundation pit
CN104612161A (en) * 2013-06-14 2015-05-13 孔志坚 Method for reversed construction of foundation pit with underground diaphragm wall
CN104652444A (en) * 2013-11-21 2015-05-27 中冶天工上海十三冶建设有限公司 Construction method for overall reverse operation of ultra-large type deep foundation pit center island type alternative earth excavation
CN104762974A (en) * 2015-03-18 2015-07-08 中天建设集团有限公司 Soil excavation method for increasing quantity of open excavated soil in reverse construction of foundation pit earthwork
CN105064401A (en) * 2015-07-29 2015-11-18 叶长青 Method for excavating and constructing large-area basement
CN105464134A (en) * 2015-12-31 2016-04-06 上海建工集团股份有限公司 Top-down and bottom-up combined construction method and supporting structure of multi-layer underground space below existing facility
CN105951843A (en) * 2016-06-17 2016-09-21 中建八局第建设有限公司 Construction method of deep foundation pit
CN106351331A (en) * 2016-08-30 2017-01-25 正太集团有限公司 Multi-floor basement reverse and normal combined construction process
CN106436760A (en) * 2016-08-12 2017-02-22 武汉志和岩土工程有限公司 Top-down construction method
CN106988345A (en) * 2017-04-01 2017-07-28 武汉科技大学 A kind of excavation method of reverse construction foundation ditch
CN109024668A (en) * 2018-06-07 2018-12-18 北京市轨道交通设计研究院有限公司 A kind of construction method of multilayer subway station
CN110080234A (en) * 2019-04-30 2019-08-02 宁波铭奥科技发展有限公司 A method of it is excavated in the secondary central island of deep foundation pit of soft soil foundation
CN110410083A (en) * 2019-08-16 2019-11-05 招商局重庆交通科研设计院有限公司 Hazy tunnel method
CN111519965A (en) * 2020-05-26 2020-08-11 中国建筑第四工程局有限公司 Reverse construction method for cellar pool of factory building for making liquor from Maotai-flavor liquor

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418571A (en) * 2008-10-15 2009-04-29 上海市第二市政工程有限公司 Middle plate construction method of wide pit top-down construction
CN101418571B (en) * 2008-10-15 2010-09-01 上海市第二市政工程有限公司 Middle plate construction method of wide pit top-down construction
CN101408025B (en) * 2008-11-11 2011-06-01 广州市设计院 Pit construction method by using major structure as bearing point
CN101705685B (en) * 2009-11-06 2011-12-28 上海市第一建筑有限公司 Stepped top-down construction method for peripheral beam slabs of underground structure
CN102383433A (en) * 2011-08-22 2012-03-21 同济大学建筑设计研究院(集团)有限公司 Design method for large deep foundation pit of super high-rise building
CN102704495A (en) * 2012-07-02 2012-10-03 上海建工集团股份有限公司 Island-basin combination excavation method for consequent operation of a major-diameter round no-inner support deep foundation pit
CN104612161A (en) * 2013-06-14 2015-05-13 孔志坚 Method for reversed construction of foundation pit with underground diaphragm wall
CN104652444B (en) * 2013-11-21 2017-04-12 中冶天工上海十三冶建设有限公司 Construction method for overall reverse operation of ultra-large type deep foundation pit center island type alternative earth excavation
CN104652444A (en) * 2013-11-21 2015-05-27 中冶天工上海十三冶建设有限公司 Construction method for overall reverse operation of ultra-large type deep foundation pit center island type alternative earth excavation
CN104762974A (en) * 2015-03-18 2015-07-08 中天建设集团有限公司 Soil excavation method for increasing quantity of open excavated soil in reverse construction of foundation pit earthwork
CN105064401A (en) * 2015-07-29 2015-11-18 叶长青 Method for excavating and constructing large-area basement
CN105464134A (en) * 2015-12-31 2016-04-06 上海建工集团股份有限公司 Top-down and bottom-up combined construction method and supporting structure of multi-layer underground space below existing facility
CN105951843B (en) * 2016-06-17 2019-02-15 中建八局第一建设有限公司 A kind of construction method of deep foundation ditch
CN105951843A (en) * 2016-06-17 2016-09-21 中建八局第建设有限公司 Construction method of deep foundation pit
CN106436760A (en) * 2016-08-12 2017-02-22 武汉志和岩土工程有限公司 Top-down construction method
CN106351331A (en) * 2016-08-30 2017-01-25 正太集团有限公司 Multi-floor basement reverse and normal combined construction process
CN106988345A (en) * 2017-04-01 2017-07-28 武汉科技大学 A kind of excavation method of reverse construction foundation ditch
CN109024668A (en) * 2018-06-07 2018-12-18 北京市轨道交通设计研究院有限公司 A kind of construction method of multilayer subway station
CN110080234A (en) * 2019-04-30 2019-08-02 宁波铭奥科技发展有限公司 A method of it is excavated in the secondary central island of deep foundation pit of soft soil foundation
CN110080234B (en) * 2019-04-30 2021-04-30 宁波铭奥科技发展有限公司 Method for excavating secondary central island in deep foundation pit of soft soil foundation
CN110410083A (en) * 2019-08-16 2019-11-05 招商局重庆交通科研设计院有限公司 Hazy tunnel method
CN110410083B (en) * 2019-08-16 2021-02-09 招商局重庆交通科研设计院有限公司 Semi-bright and semi-dark tunnel entering method
CN111519965A (en) * 2020-05-26 2020-08-11 中国建筑第四工程局有限公司 Reverse construction method for cellar pool of factory building for making liquor from Maotai-flavor liquor

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