CN109235493A - Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method - Google Patents
Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method Download PDFInfo
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- CN109235493A CN109235493A CN201811027826.1A CN201811027826A CN109235493A CN 109235493 A CN109235493 A CN 109235493A CN 201811027826 A CN201811027826 A CN 201811027826A CN 109235493 A CN109235493 A CN 109235493A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
本发明公开一种逆作法中地下室梁板超挖与短支模施工方法，包括如下步骤：（1）土方开挖；（2）浇筑垫层；（3）短支撑搭设；（4）环梁下挂节点的施工：在环梁或梁柱节点位置进行下挂处理，并提前预留向上和向下的钢筋；（5）模板支设和钢筋绑扎；（6）浇筑混凝土。本发明解决了梁板结构和施工难度较大的环梁、环板节点等，更容易实现管控和监督施工质量，避免了砖胎膜施工因为工艺上的短板而导致的质量缺陷及二次修补费用。The invention discloses a construction method for basement beam slab over-excavation and short-support formwork in the reverse method, comprising the following steps: (1) earthwork excavation; (2) pouring cushion; (3) short support erection; (4) hanging under the ring beam Construction of joints: hang down the ring beam or beam-column joints, and reserve upward and downward reinforcing bars in advance; (5) formwork support and reinforcing bar binding; (6) pouring concrete. The invention solves the girder-slab structure and the ring-beam and ring-slab joints which are difficult to construct, makes it easier to control and supervise the construction quality, and avoids the quality defects and secondary defects in the construction of the brick tire membrane due to the short board in the process. Repair costs.
Description
Technical field
The present invention relates to a kind of construction techniques, be specifically related to it is a kind of in reverse construction, it is half against method, suitable
It is inverse that the inverse basement contignation for making region of the palpus progress such as construction is combined to backbreak and short formwork construction method.
Background technique
Currently, with increasingly rare, green construction the needs in urban land space and wanting for engineering contract node duration
The composite factors effect such as ask, the concept of adverse construction method method is increasingly well known and receives, using reverse construction engineering from
Pervious phoenix feathers and unicorn horns by now customary, and in a foreseeable future still has the tendency that continuing development and universal.But
It is since contrary sequence method and conventional construction method are there are different, construction teams and groups are there are thinking set, and there are short slabs in construction technology, lead
The quality existing defects for causing engineering, can delay the duration instead to supply a gap.
Summary of the invention
Goal of the invention: it present invention aims in view of the deficiencies of the prior art, is backbreak using the earthwork and is carried out after certain depth
The method of short formwork realizes that become inverse makees as suitable, significantly shortening work instead of the construction technology of brick fetal membrane in traditional contrary sequence method
Phase, and more preferably concrete formation quality is provided.
Technical solution: basement beam slab is backbreak and short formwork construction method in contrary sequence method of the present invention, including is walked as follows
It is rapid:
(1) earth excavation: designing according to Design of Main Structure situation and unearthed channel, carries out earth excavation, backbreak in the earthwork
Cheng Zhong, to backbreaking, depth is calculated, it is ensured that depth of backbreaking is in the allowable value of design load and deep pit monitor；
(2) pour bed course: after earth excavation, it is smooth to carry out the earthwork immediately, and directly pour in foundation pit plain concrete or
Pour armored concrete bed course；
(3) according to deep pit monitor and loading condition, different branch mold materials short supporting erection: is taken for different digging depths
And formwork way, the region for formwork height less than 1 meter are more than 1 for formwork height using short flitch as support system
The region of rice expires hall frame support system using short steel pipes or disk buckle type scaffold support system carries out short mould and installs；
(4) hang the construction of node under ring beam: carrying out lower extension processing in ring beam or bean column node position, and advance reservation upwards and to
Under reinforcing bar；
(5) formwork erection and reinforcing bar binding: after short support system sets up completion and acceptance(check), installing for beam-slab template is carried out
With the binding of beam reinforced steel bar；
(6) casting concrete: after the completion of template and reinforcement construction, pouring for concrete is carried out.
Further preferably technical solution is the present invention, and in step (1), the earthwork area Shi Mei of backbreaking is excavated to substrate absolute altitude
Apply concrete cushion and structural beam slab in time afterwards, closing foundation ditch periphery cubic metre of earth is by the way of stripping alternation excavation, sector boss
Degree is not more than 30m, in allowed limits by the Deformation control of peripheral facilities caused by excavation of foundation pit.
Preferably, in step (2) in casting concrete bed course, when foundation pit soil condition is preferable, it is mixed directly to pour element
Solidifying soil padding；When foundation pit soil condition is bad, armored concrete bed course is poured, and early strength agent is added in concrete.
Preferably, the specific practice in step (3) using short flitch as support system are as follows: first install cube, cube
Pad sets flitch or scaffold board below, and then construction master is stupefied and secondary stupefied, is fixed between flitch back cord and beam side template, in entirety
After support system molding, supporting module and assembling reinforcement.
Preferably, expire hall frame support system using short steel pipes in step (3) or the progress of disk buckle type scaffold support system is short
When mould installs, in upright bar lower part, pad sets flitch or scaffold board.
Preferably, in step (1) in earth excavation to ring beam or downward 500 mm of bean column node absolute altitude, backfill 450 ~
The blank sand of 550 mm thickness is simultaneously compacted, then by the thin galvanized iron sheet paving of 0.1 mm thickness in the surface of blank sand, step (3)
In reserved steel bar wear out thin galvanized iron sheet and be inserted into blank layer of sand.
The utility model has the advantages that construction method of the invention is suitable for reverse construction, half against method, along inverse combination construction etc.
The inverse basement contignation for making region must be carried out, while being suitable for must be by hanging node, beam-under beam-column of reverse construction
Node, ring beam joint, circular board node are hung under shear wall, the present invention is backbreak to basement beam slab using the earthwork and carried out after certain depth
The method of short formwork, by the earthwork of backbreaking to contignation absolute altitude following certain depth, the short formwork of contignation is applied in realization
Work becomes the lower extension of the nodes such as inverse ring beam, beam-column joint and the beam-shear wall being used as when can preferably realize adverse construction method along work
Construction is reserved with reinforcing bar, and has preferable molding effect, and construction method of the invention solves contignation and construction hardly possible
Spend biggish ring beam, circular board node etc., it is easier to realize control and supervision construction quality, avoid the construction of brick fetal membrane because of technique
On short slab caused by mass defect and secondary renewal expense；
In addition in the present invention in earth excavation to ring beam or downward 500 mm of bean column node absolute altitude, backfill 450 ~ 550 mm are thick
Blank sand is simultaneously compacted, then by the thin galvanized iron sheet paving of 0.1 mm thickness on the surface of blank sand, using ring when backbreaking cubic metre of earth
The concrete formation quality control that node is hung under beam, makes ring beam lower surface have preferable flatness and perception.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
Embodiment: basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method, is included the following steps:
(1) foundation pit Yield rainfall relation: before earth excavation construction, temporary drainage systems organization in construction area is carried out, temporary drainage must not
Destroy the ground of adjacent buildings or structures and the side slope of digging, earth fill.In landform, complex geologic conditions, it may occur however that come down, collapse
When the location excavation to collapse, drainaging scheme is determined by designing unit.Occurs surface water confluence around place, row is rushed down or foggara seeps
When leakage, tissue draining takes safeguard measure to foundation pit.When excavating the foundation pit (slot) lower than underground water, side slope and foundation pile, rationally
Select dewatering measure lowering of watertable.Before earth excavation construction and in work progress, the work of foundation pit Yield rainfall relation is carried out at scene, really
It is stable and safe to protect foundation pit, until level of ground water reaches security restriction hereinafter, can stop Yield rainfall relation construction.
(2) pit retaining monitoring: the third party monitoring unit of profession is selected to carry out pit retaining monitoring in work progress, and according to this item
Mesh formulates special construction plan, in addition to listing detailed pit retaining monitoring project and monitoring project alarming value, works out and makes an inspection tour in detail
Inspection program, inspection content include and are not limited to the following aspects: supporting construction, construction operating condition, surrounding enviroment, monitoring facilities
Deng.
(3) it earth excavation: is designed in digging process according to Design of Main Structure situation and unearthed channel, when fully considering
Empty effect rule considers that foundation pit side certain distance takes different excavations from basin excavation area in the foundation pit for carrying out basin excavation
Depth.Because support pile horizontal displacement is affected by the soil body in the certain distance of foundation pit side, thus in a certain range of foundation pit side into
The excavation of row slight depth, basin excavation area can realize deeper shoveling in the case where loading condition allows.It backbreaks in the earthwork
In the process, depth of backbreaking strictly is calculated, it is ensured that depth of backbreaking is in the allowable value of design load and deep pit monitor, no
Obtain is more than to design depth of backbreaking.When backbreaking in the certain distance of foundation pit side and other regions, depth of clearly backbreaking initial surface
It is structural beams bottom or structural slab bottom.Earth excavation strictly presses the execution of design requirement operating condition in foundation pit, it then follows subregion, divides at layering
Block, benzvalene form symmetrically excavate principle, and every area is excavated to after substrate absolute altitude applies concrete cushion and structural beam slab in time, reduce without branch
Support exposure duration and the therefore hole bottom rebound of initiation；Take stripping alternation excavation mode, sector boss in closing foundation ditch periphery cubic metre of earth
Degree is not more than 30m, in allowed limits by the Deformation control of peripheral facilities caused by excavation of foundation pit.
(4) pour bed course: after earth excavation, carrying out that the earthwork is smooth and bed course pours immediately, for soil condition compared with
Good foundation pit, can directly pour plain concrete, the foundation pit bad for soil condition pours armored concrete bed course, and considers
Early strength agent is added, the up to standard of strength grade of concrete is accelerated.
(5) according to deep pit monitor and loading condition, lower digging different depth short supporting erection: is taken to different zones in foundation pit
Form of construction work, different branch mold materials and formwork way are taken for different digging depths.It is short support frequently with material
There are flitch, steel pipe, disk to buckle, short formwork is carried out using different materials according to different digging depths, it is small for formwork height
It is more than 1 meter of region for formwork height, short steel pipes, which can be used, expires hall using short flitch as support system in 1 meter of region
Frame support system or disk buckle type scaffold support system.
Region for formwork height less than 1 meter, because steel pipe does not have conventional modulus, and flitch can be realized arbitrarily at the scene
The cutting of size, therefore generally use short flitch support system, specific practice are first to install cube, cube below pad set flitch or
Scaffold board is to enhance overall stability；Construction master is stupefied and secondary stupefied, is fixed between flitch back cord and beam side template with spike, increases
The overall stability of strong support system；Twice working procedure before completing, short flitch integrated support system molding；It supporting module and ties up
It wire-ties.
It is more than 1 meter of region for formwork height, short steel pipes can be used or disk buckle type scaffold support system, frame body are set up
In strict accordance with steel tube fastener formula scaffold building regulation enforcement, and in upright bar lower part pad, to set flitch or scaffold board whole to enhance frame body
Body stability.Steel pipe frame meets the related request that full hall scaffold sets up specification.
(6) construction of node is hung under ring beam: since construction method of the invention is chiefly used in the engineering of reverse construction, thus it is difficult
Exempt to encounter the construction of the special steels such as ring beam, ring flat-plate muscles and joints-vital links in a speech point, the elongated processing for needing to carry out lower extension and pre-inserted reinforcing bar of these nodes
To realize that vertical the suitable of wall column structure is constructed.The present invention carries out lower extension processing in ring beam or bean column node position, and pre- in advance
Reinforcing bar up and down is stayed, in order to make to hang node under ring beam with preferable flatness and molding effect, the present invention is in the earthwork
When being excavated to ring beam or downward 500 mm of bean column node absolute altitude, the blank sand for backfilling 500 mm thickness is simultaneously compacted, then by 0.1
On the surface of blank sand, reserved steel bar is worn out thin galvanized iron sheet and is inserted into blank layer of sand for the thin galvanized iron sheet paving of mm thickness.Due to thin
Galvanized iron sheet is unlikely to deform, and preferable flatness can be still kept in concreting, and be can guarantee and inserted after reinforcing bar is smoothly worn out
Enter in blank layer of sand.After demoulding, galvanized iron sheet is cleaned out together with blank sand.Beam-column and the lower extension construction of beam-shear wall
And later period bell-mouthed stay set, ensure that vertical structure in contrary sequence method along execution conditions are made, can effectively shorten duration and reduction
Difficulty of construction.
(7) formwork erection and reinforcing bar binding: after short support system sets up completion and acceptance(check), beam-slab template is carried out
Install the binding with beam reinforced steel bar；
(8) casting concrete: after the completion of template and reinforcement construction, pouring for concrete is carried out.
Surveying setting-out, masonry after the present embodiment is using the construction of short formwork support system, instead of the construction of traditional brick fetal membrane
The processes such as fetal membrane, mortar plastering generally still shorten the duration though must carry out that bed course pours, frame body is set up, while by
In the advantage in way, beam-column joint and the lower extension construction of beam-shear wall node and the reserved construction of reinforcing bar are facilitated, is accomplished
The suitable of vertical structure is constructed, and the duration is again reduced.
Certain engineering is in the construction method of application the present embodiment, and by measuring and calculating, basement B1 plate and B2 plate add up to the saving duration
10 days.Meanwhile the mass defects such as avoiding the construction of traditional brick fetal membrane concrete formation be ineffective, eliminate later rework repairing
Expense, by measuring and calculating, amount to save 400,000 yuan of later period renewal expense, obtain preferable economic benefit.
As described above, must not be explained although the present invention has been indicated and described referring to specific preferred embodiment
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.
Claims (6)
1. basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method, which comprises the steps of:
(1) earth excavation: designing according to Design of Main Structure situation and unearthed channel, carries out earth excavation, backbreak in the earthwork
Cheng Zhong, to backbreaking, depth is calculated, it is ensured that depth of backbreaking is in the allowable value of design load and deep pit monitor；
(2) pour bed course: after earth excavation, it is smooth to carry out the earthwork immediately, and directly pour in foundation pit plain concrete or
Pour armored concrete bed course；
(3) according to deep pit monitor and loading condition, different branch mold materials short supporting erection: is taken for different digging depths
And formwork way, the region for formwork height less than 1 meter are more than 1 for formwork height using short flitch as support system
The region of rice expires hall frame support system using short steel pipes or disk buckle type scaffold support system carries out short mould and installs；
(4) hang the construction of node under ring beam: carrying out lower extension processing in ring beam or bean column node position, and advance reservation upwards and to
Under reinforcing bar；
(5) formwork erection and reinforcing bar binding: after short support system sets up completion and acceptance(check), installing for beam-slab template is carried out
With the binding of beam reinforced steel bar；
(6) casting concrete: after the completion of template and reinforcement construction, pouring for concrete is carried out.
2. basement beam slab is backbreak and short formwork construction method in contrary sequence method according to claim 1, which is characterized in that step
Suddenly in (1), the earthwork area Shi Mei of backbreaking is excavated to after substrate absolute altitude and applies concrete cushion and structural beam slab in time, closing foundation ditch
Periphery cubic metre of earth is by the way of stripping alternation excavation, and section length is not more than 30m, by the change of peripheral facilities caused by excavation of foundation pit
Shape controls in allowed limits.
3. basement beam slab is backbreak and short formwork construction method in contrary sequence method according to claim 1, which is characterized in that step
Suddenly in (2) in casting concrete bed course, when foundation pit soil condition is preferable, plain concrete cushion layer is directly poured；In foundation pit earth
When matter condition is bad, armored concrete bed course is poured, and early strength agent is added in concrete.
4. basement beam slab is backbreak and short formwork construction method in contrary sequence method according to claim 1, which is characterized in that step
Suddenly the specific practice in (3) using short flitch as support system are as follows: first install cube, cube below pad and set flitch or foot hand
Plate, then construction master is stupefied and secondary stupefied, is fixed between flitch back cord and beam side template, after integrated support system molding, branch
If template and assembling reinforcement.
5. basement beam slab is backbreak and short formwork construction method in contrary sequence method according to claim 1, which is characterized in that step
Suddenly expire hall frame support system using short steel pipes in (3) or when the short mould of disk buckle type scaffold support system progress installs, under upright bar
Portion's pad sets flitch or scaffold board.
6. basement beam slab is backbreak and short formwork construction method in contrary sequence method according to claim 1, which is characterized in that step
Suddenly in (1) in earth excavation to ring beam or downward 500 mm of bean column node absolute altitude, the blank sand of 450 ~ 550 mm thickness is backfilled simultaneously
It is compacted, is then worn out reserved steel bar of the thin galvanized iron sheet paving of 0.1 mm thickness in the surface of blank sand, step (3) thin
Galvanized iron sheet is simultaneously inserted into blank layer of sand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811027826.1A CN109235493A (en) | 2018-09-04 | 2018-09-04 | Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method |
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| CN201811027826.1A CN109235493A (en) | 2018-09-04 | 2018-09-04 | Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777846A (en) * | 2019-10-22 | 2020-02-11 | 中国建筑第八工程局有限公司 | Local reverse construction soil matrix construction method for high-rise residential buildings |
| CN112411560A (en) * | 2020-11-02 | 2021-02-26 | 中交第四航务工程局有限公司 | Step-by-step rapid construction method for beam plate structure of support body system in deep and large foundation pit |
| CN112431224A (en) * | 2020-12-22 | 2021-03-02 | 中建一局集团建设发展有限公司 | Short formwork support method in reverse construction method of basement structure |
| CN113338333A (en) * | 2021-06-09 | 2021-09-03 | 中铁四局集团第五工程有限公司 | Quick mounting method for steel beam plate under cover-excavation top-down condition |
| CN113668588A (en) * | 2021-08-20 | 2021-11-19 | 中建五局土木工程有限公司 | Efficient backfilling construction method for the foundation of large-scale prefabricated steel box workshop |
| CN115262624A (en) * | 2022-08-26 | 2022-11-01 | 中电建铁路建设投资集团有限公司 | Construction method for reverse molding retaining wall between piles in PC construction method |
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| 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 |
| CN104314069A (en) * | 2014-10-15 | 2015-01-28 | 中国建筑第八工程局有限公司 | Positioning construction method for reserved steel bars of side walls in reverse construction |
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- 2018-09-04 CN CN201811027826.1A patent/CN109235493A/en active Pending
Patent Citations (2)
| 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 |
| CN104314069A (en) * | 2014-10-15 | 2015-01-28 | 中国建筑第八工程局有限公司 | Positioning construction method for reserved steel bars of side walls in reverse construction |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777846A (en) * | 2019-10-22 | 2020-02-11 | 中国建筑第八工程局有限公司 | Local reverse construction soil matrix construction method for high-rise residential buildings |
| CN112411560A (en) * | 2020-11-02 | 2021-02-26 | 中交第四航务工程局有限公司 | Step-by-step rapid construction method for beam plate structure of support body system in deep and large foundation pit |
| CN112431224A (en) * | 2020-12-22 | 2021-03-02 | 中建一局集团建设发展有限公司 | Short formwork support method in reverse construction method of basement structure |
| CN113338333A (en) * | 2021-06-09 | 2021-09-03 | 中铁四局集团第五工程有限公司 | Quick mounting method for steel beam plate under cover-excavation top-down condition |
| CN113668588A (en) * | 2021-08-20 | 2021-11-19 | 中建五局土木工程有限公司 | Efficient backfilling construction method for the foundation of large-scale prefabricated steel box workshop |
| CN113668588B (en) * | 2021-08-20 | 2022-10-11 | 中建五局土木工程有限公司 | Efficient backfill construction method for large-scale assembled steel plate box factory building foundation |
| CN115262624A (en) * | 2022-08-26 | 2022-11-01 | 中电建铁路建设投资集团有限公司 | Construction method for reverse molding retaining wall between piles in PC construction method |
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Application publication date: 20190118 |