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 PDF

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Publication number
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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China
Prior art keywords
short
construction
slab
formwork
backbreak
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CN201811027826.1A
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Chinese (zh)
Inventor
陈刚
肖汉
朱亮
付来
全有维
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Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
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Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
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Priority to CN201811027826.1A priority Critical patent/CN109235493A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/045Underground 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
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The present invention discloses basement beam slab in a kind of contrary sequence method and backbreaks and short formwork construction method, includes the following steps: (1) earth excavation;(2) bed course is poured;(3) short supporting erection;(4) construction of node is hung under ring beam: carrying out lower extension processing, and the reinforcing bar of advance reservation up and down in ring beam or bean column node position;(5) formwork erection and reinforcing bar binding;(6) casting concrete.The present invention solves contignation and the biggish ring beam of difficulty of construction, circular board node etc., it is easier to realize control and supervision construction quality, avoid the construction of brick fetal membrane because of mass defect and secondary renewal expense caused by technologic short slab.

Description

Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method
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.
CN201811027826.1A 2018-09-04 2018-09-04 Basement beam slab is backbreak and short formwork construction method in a kind of contrary sequence method Pending CN109235493A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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

Citations (2)

* 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
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

Patent Citations (2)

* 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
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 (3)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20190118