CN101560803A - Construction method of reinforced concrete truss conversion layer structure - Google Patents

Construction method of reinforced concrete truss conversion layer structure Download PDF

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Publication number
CN101560803A
CN101560803A CNA2009100433929A CN200910043392A CN101560803A CN 101560803 A CN101560803 A CN 101560803A CN A2009100433929 A CNA2009100433929 A CN A2009100433929A CN 200910043392 A CN200910043392 A CN 200910043392A CN 101560803 A CN101560803 A CN 101560803A
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China
Prior art keywords
concrete
truss
conversion layer
vertical rod
brace
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CNA2009100433929A
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CN101560803B (en
Inventor
李和平
张文祥
李天成
刘晓晖
周妙玲
卢亮
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Hunan Changda Construction Group Co., Ltd.
Hunan Wangxin Construction Group Co., Ltd.
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HUNAN CHANGDA CONSTRUCTION GROUP CO Ltd
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Abstract

The invention discloses a construction method of a reinforced concrete truss conversion layer structure, comprising the following steps: preparing construction; arranging the lower chord beam of the truss, a layer beam at which the lower chord is arranged, a slab steel bar and a module; preliminarily embedding a conversion layer column, the wall and the vertical rod of the truss, and the steel bar of a diagonal rod; pouring the lower cord and a structural concrete of the layer at which the lower cord is arranged; setting up the support frame of the truss; colligating the steel bars such as the conversion layer column, a wall, the vertical rod, and the like; supporting the column, the wall, the module of the vertical rod, the diagonal rod and the bottom module of a beam; colligating the diagonal rod, an upper cord and the steel bar of the upper cord; supporting the diagonal rod, the side module of the beam and the bottom module of the beam; colligating an upper reinforcing plate; reinforcing a bearing frame; pouring concrete; and maintaining concert. The step of pouring the lower cord and the structural concrete of the layer at which the lower cord is arranged and the step of pouring concrete adopt self-compacting concrete to automatically fill space in the module by dead weight to form a compacting concrete structure; and wet preservation is carried out on the concrete structure with the module for 7-10 days. The method has the advantages of low cost, better structure durability, and the like, and is applicable to the constructional engineering of civic building.

Description

A kind of construction method of reinforced concrete truss conversion layer structure
Technical field
The present invention relates to a kind of construction techniques, particularly relate to a kind of construction method of reinforced concrete truss conversion layer structure of highrise building.
Background technology
Current building is to multi-functional, comprehensive purposes development, in highrise building, upper floor often needs to satisfy the axis arranged requirement of the little standard widths of a room in an old-style house such as dwelling house, office, guest room, the bottom then needs to satisfy the post net space requirement than large span such as shop, restaurant, therefore work as differing greatly of bottom floor vertical structure system or form and upper floor, when perhaps upper and lower floor vertical axis misplaces, then arrange conversion layer at the floor of structural change.Structural transition layer plays " forming a connecting link " in building, be " top board " of substructure, is again " basis " of superstructure, in whole fabric structure system, plays vital interconnect function.The trussed construction conversion layer is clearer and more definite and more rational loading characteristic, lighter and handier form of structure, the material usage of more saving and can cross over bigger superiority such as span with it, and it is with a wide range of applications.
The step of present job practices is: preparation of construction → truss lower edge beam and place layer beam thereof, the slab muscle, template installation → conversion layer post, wall and truss vertical rod, the brace reinforcing bar is pre-buried → build lower edge beam and place layer structural concrete thereof → set up truss support frame → colligation conversion layer post, wall, reinforcing bar such as vertical rod and install post, wall, vertical rod template and brace and beam bottom board → colligation brace and wind up beam and upper strata beam steel and install brace, beam side and plate bed die → bundle top plate muscle → support for shuttering reinforcing → concreting → concrete curing.But build lower edge beam and place layer structural concrete and concreting thereof at the processing step processing step and adopt ordinary concrete.As everyone knows, ordinary concrete is mobile poor, and conversion layer structure place reinforcing bar gathers, and occurs fatal defectives such as cavity, bubble in the concrete component easily.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, the construction method of reinforced concrete truss conversion layer structure that provides a kind of concreting Forming Quality that can guarantee the conversion layer structure place that reinforcing bar gathers to adhere to specification.
Purpose of the present invention is achieved by following technical proposals: comprise processing step: preparation of construction, truss lower edge beam and place layer beam thereof, the slab muscle, template is installed, the conversion layer post, wall and truss vertical rod, the brace reinforcing bar is pre-buried, build lower edge beam and place layer structural concrete thereof, set up the truss support frame, colligation conversion layer post, wall, reinforcing bar such as vertical rod and install post, wall, vertical rod template and brace and beam bottom board, colligation brace and wind up beam and upper strata beam steel and install brace, beam side and plate bed die, prick the top plate muscle, support for shuttering is reinforced, concreting, lower edge beam and place layer structural concrete and concreting employing self-compacting concrete thereof are built in concrete curing, described processing step, and the interior space of filling template forms closely knit concrete structure by conducting oneself with dignity voluntarily.
Described self-compacting concrete waters smashing the back band mould moisture-keeping maintaining 7~10 days of finishing.
Compared with prior art, the present invention has the following advantages: described methodological science is reasonable, the self-compacting concrete good fluidity that is adopted, and it builds the requirement that Forming Quality can meet the concreting moulding designing quality at the densely covered conversion layer structure place of reinforcing bar fully, minimizing is done over again, and reduces cost.Be suitable in the civic building construction work, using.
Description of drawings
Accompanying drawing is one embodiment of the invention process flow diagram;
Among the figure: 1, preparation of construction, 2, truss lower edge beam and place layer beam thereof, slab muscle, template are installed, 3, conversion layer post, wall and truss vertical rod, brace reinforcing bar are pre-buried, 4, build lower edge beam and place layer structural concrete thereof, 5, set up the truss support frame, 6, reinforcing bar such as colligation conversion layer post, wall, vertical rod and install post, wall, vertical rod template and brace and beam bottom board, 7, colligation brace and wind up beam and upper strata beam steel and install brace, beam side and plate bed die, 8, prick the top plate muscle, 9, support for shuttering is reinforced, 10, concreting, 11, concrete curing.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
With reference to accompanying drawing, the present invention includes processing step: preparation of construction 1, truss lower edge beam and place layer beam thereof, the slab muscle, template installs 2, the conversion layer post, wall and truss vertical rod, brace reinforcing bar pre-buried 3, build lower edge beam and place layer structural concrete 4 thereof, set up truss support frame 5, colligation conversion layer post, wall, reinforcing bar such as vertical rod and install post, wall, vertical rod template and brace and beam bottom board 6, colligation brace and wind up beam and upper strata beam steel and install brace, beam side and plate bed die 7, prick top plate muscle 8, support for shuttering reinforces 9, concreting 10, concrete curing 11, described processing step are built lower edge beam and place layer structural concrete 4 thereof and concreting 10 and are adopted self-compacting concretes the interior space of filling template forms closely knit concrete structure by conducting oneself with dignity voluntarily.
Described self-compacting concrete waters smashing the back band mould moisture-keeping maintaining 7~10 days of finishing.
Embodiment: certain engineering, underground 2 layers, 31 layers on the ground, one, two layer is the market, floor height is respectively 5.8m, 4.4m, is made up of 1#, 2#, three high buildings of 3#; Building general height is 99.8m, overall floorage 132838m 2Conversion layer is following to be reinforced concrete frame core shell structure, and colum network size is based on 12m * 12m; Conversion layer is above to be reinforced concrete shear wall structure.Conversion layer is positioned at the 3rd layer, adopts cast-in-situ steel reinforced concrete mixing Vierendeel truss, floor height 4.75m, the thick 200mm of conversion layer base plate, the thick 280mm of top board.Truss lower edge main beam section size has 1600 * 1000mm, 1200 * 1000mm, three kinds of specifications of 1000 * 1000mm; The truss main beam section size of winding up has 1600 * 2300mm, 1200 * 2300mm, four kinds of specifications of 1000 * 2300mm, 1000 * 2100mm; The secondary beam cross dimensions has 1000 * 2100mm, 800 * 2100mm, 800 * 1800mm; Vertical rod cross dimensions 600 * 800mm; The brace cross dimensions has 1000 * 1400mm, 800 * 1200mm, 800 * 1000mm; Strength grade of concrete is C40.
Each processing step is described as follows:
Processing step preparation of construction 1: the lower edge beam steel that carries out conversion layer install and truss vertical rod, brace and wall, post reinforcing bar pre-buried before, must accurately locate unwrapping wire; Before lower edge beam and place deck concrete construction thereof, carry out axis and absolute altitude once more and check, check joint bar position, bar gauge, anchorage length, skeleton size etc. simultaneously, can carry out the construction of this layer structural concrete after all adhering to specification.
Processing step truss lower edge beam and place layer beam thereof, slab muscle, template install 2: when truss lower edge beam and place layer beam steel thereof are installed, conversion layer vertical rod, brace and wall, post reinforcing bar are put in place by designing requirement is pre-buried; Can seal mould after inspection reinforcement location, specification, anchorage length, skeleton size etc. are all errorless, and then the colligation floor bar.
Processing step conversion layer post, wall and truss vertical rod, brace reinforcing bar pre-buried 3: lower edge beam and place layer reinforcing bar thereof and template install, remove mould interior rubbish, foreign material once more and template is carried out suitably moistening, and check and accept on inspection errorless after, promptly can carry out lower edge beam and place layer structural concrete thereof the construction.
Processing step is built lower edge beam and place layer structural concrete 4 thereof: the interior space of filling template forms closely knit concrete structure by conducting oneself with dignity voluntarily to adopt self-compacting concrete.
Processing step truss support for shuttering sets up 5:
The utilization of 1 conversion layer lower floor support for shuttering support system
(1) because should not staying, the truss conversion layer construction establishes constuction joint, so its support system should consider that pricncipal rafter, brace, vertical rod, primary and secondary beam, plate are from heavy load and other working load, therefore except the support system carrying that makes full use of this layer of conversion layer, also must keep under the conversion layer two-layer at least support for shuttering does not tear open, and increase the bridging and the diagonal brace of each layer, under beam, suitably add the adjustable support of tree support or raft support.
(2) lower floor's support for shuttering support system must satisfy following the requirement:
1. all round victory support for shuttering adds bridging and diagonal brace, is no more than 4.5m to spacing in length and breadth.
2. add the tree support under the beam, whenever span centre is provided with 1, and its position should be corresponding with conversion layer; As establish the adjustable support that raft supports, then whenever stride and be provided with 3 to 5; The position that the truss vertical rod is arranged adds 1 tree support or 2 to 4 raft supports at every place's vertical rod corresponding position; The raft support that is provided with needs to become an integral body with the steel pipe drawknot.
Determining of 2 conversion layer truss support systems
The truss conversion layer support system must pass through and calculate, and can construct after being expounded through peer review affirmation.
3 truss support framves are set up requirement
(1) setting of horizontal support bar
1. utilize all round victory support for shuttering as horizontal support, horizontal support must not be less than three roads, upper, middle and lower, and horizontal support short transverse spacing should be greater than 1400mm.
2. near masthead and bar pin place, draw admittedly, sweep the wooden a tree, used in making timber for boats of tight plug under the foot lever, to reduce concentrated stress with waling stripe is two-way.
(2) setting of vertical rod
1. laterally vertical rod is provided with 1~3 again for establishing near the every side in the both sides of beam or brace under 1, beam or the brace, 3~5 of promptly every rows, wherein, beam or brace width 〉=1000mm establish 3, width 800~1000mm establishes 2, width at 800mm with interior establish 1.
2. every row's vertical rod longitudinal pitch is no more than 500mm under beam or the brace; Vertical rod all is no more than 800mm to spacing in length and breadth under the plate.
3. whole elongated steel pipe used in the support vertical rod under the beam as far as possible, if need two vertical connections, can only adopt the butt joint of " one " word fastener, forbids adopting " ten " word fastener to connect; Clasp is answered interlaced arrangement, and in the joint of two adjacent vertical rods should not be arranged on synchronously, the distance that staggers in short transverse every two joints of being separated by of a vertical rod in synchronously should not be less than 500mm.
(3) setting of additional support
Whenever span centre is arranged side by side two tree supports or vertically is no more than 1500mm by spacing along beam the raft support is set, and supportting raft in length and breadth with steel pipe simultaneously, drawknot becomes an integral body.
The reinforcing of 4 support systems
For improving the resistance to overturning and the resistance to capsizing of template supporting system, along the vertical rod height, arrange in length and breadth and be no less than four road horizon bars, wherein sweep foot lever together, be used to shelve the compound beam bed die together, be used to together shelve the compoboard bed die, and connect as a whole mutually, and adding bridging on the direction in length and breadth between the vertical rod at the bottom of the beam, horizon bar or leger step pitch are no more than 1400mm; Bridging is provided with continuously vertically suitable, and beam section direction is established every about 3000mm together.
Because the single bearing load of vertical rod is bigger, for avoiding stress to concentrate supporting layer is produced punching failure, therefore should be in vertical rod underlay channel-section steel or wooden a tree, used in making timber for boats, template etc.As adopt channel-section steel, then notch up, vertical rod is stood in the notch, both sides stopper jam-pack.
The checking computations of 5 support systems, the checking computations of truss support system should comprise following content:
(1) vertical rod stability checking computations;
(2) fastener antiskid Checking Calculation;
(3) conversion layer lower support floor checking of bearing capacity.
Reinforcing bars such as processing step colligation conversion layer post, wall, vertical rod and install post, wall, vertical rod template and brace and beam bottom board 6, colligation brace and wind up beam and upper strata beam steel and install brace, beam side and plate bed die 7, prick top plate muscle 8, ripe existing techniques in realizing is adopted in support for shuttering reinforcings 9 etc.
Processing step concreting 10, the interior space of filling template forms closely knit concrete structure by conducting oneself with dignity voluntarily to adopt self-compacting concrete.
Processing step concrete curing 11: self-compacting concrete waters smashing the back band mould moisture-keeping maintaining 7~10 days of finishing.And after concrete final set, begin to carry out concrete curing, keep template to be in moisture state all the time; Completely hang gunnysack and water seasoning in beam side, post side, bar side etc. after the form removal, keep gunnysack to remain moisture state.

Claims (2)

1. construction method of reinforced concrete truss conversion layer structure, comprise processing step: preparation of construction (1), truss lower edge beam and place layer beam thereof, the slab muscle, template is installed (2), the conversion layer post, wall and truss vertical rod, brace reinforcing bar pre-buried (3), build lower edge beam and place layer structural concrete (4) thereof, set up truss support frame (5), colligation conversion layer post, wall, reinforcing bar such as vertical rod and install post, wall, vertical rod template and brace and beam bottom board (6), colligation brace and wind up beam and upper strata beam steel and install brace, beam side and plate bed die (7), prick top plate muscle (8), support for shuttering is reinforced (9), concreting (10), concrete curing (11) is characterized in that: described processing step is built lower edge beam and place layer structural concrete (4) and concreting (10) employing self-compacting concrete thereof, and the interior space of filling template forms closely knit concrete structure by conducting oneself with dignity voluntarily.
2. a kind of construction method of reinforced concrete truss conversion layer structure according to claim 1 is characterized in that: described self-compacting concrete waters smashing the back band mould moisture-keeping maintaining 7~10 days of finishing.
CN2009100433929A 2009-05-14 2009-05-14 Construction method of reinforced concrete truss conversion layer structure Expired - Fee Related CN101560803B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914990A (en) * 2010-07-28 2010-12-15 重庆建工第二建设有限公司 Beam-type transition layer cast-in-situ crossbeam construction formwork supporting system
CN102852255A (en) * 2012-08-15 2013-01-02 杨众 Combined floor for same-level drainage toilet and construction method
CN103276894A (en) * 2013-06-04 2013-09-04 河南国基建设集团有限公司 Support system of large-cross-section girder transfer floor of hollow floor system and construction technology
CN106522551A (en) * 2016-11-18 2017-03-22 重庆建工住宅建设有限公司 Steel fiber self-compacting concrete construction method for conversion layer
CN107724688A (en) * 2017-11-20 2018-02-23 中国二冶集团有限公司 A kind of beam muscle colligation auxiliary stand
CN108331172A (en) * 2018-04-20 2018-07-27 香港华艺设计顾问(深圳)有限公司 A kind of conversion beam of the unidirectional diagonal brace of setting
CN108643341A (en) * 2018-05-22 2018-10-12 中冶建工集团有限公司 The construction method of high-rise building box-structure conversion layer
CN109057149A (en) * 2018-09-18 2018-12-21 中国铁路设计集团有限公司 A kind of steel reinforced concrete conversion beam and its inverted order construction method
CN109235898A (en) * 2018-09-19 2019-01-18 哈尔滨工业大学建筑设计研究院 A kind of huge space transformational structure of novel large-span prestressed rigid body and its construction method
CN111962675A (en) * 2020-08-20 2020-11-20 泰宏建设发展有限公司 Construction method of large-span special-shaped cast-in-place reinforced concrete open-web truss

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914990A (en) * 2010-07-28 2010-12-15 重庆建工第二建设有限公司 Beam-type transition layer cast-in-situ crossbeam construction formwork supporting system
CN102852255A (en) * 2012-08-15 2013-01-02 杨众 Combined floor for same-level drainage toilet and construction method
CN102852255B (en) * 2012-08-15 2016-03-09 杨众 A kind of co-layer draining washroom composite floor and construction method
CN103276894A (en) * 2013-06-04 2013-09-04 河南国基建设集团有限公司 Support system of large-cross-section girder transfer floor of hollow floor system and construction technology
CN106522551A (en) * 2016-11-18 2017-03-22 重庆建工住宅建设有限公司 Steel fiber self-compacting concrete construction method for conversion layer
CN107724688A (en) * 2017-11-20 2018-02-23 中国二冶集团有限公司 A kind of beam muscle colligation auxiliary stand
CN108331172A (en) * 2018-04-20 2018-07-27 香港华艺设计顾问(深圳)有限公司 A kind of conversion beam of the unidirectional diagonal brace of setting
CN108643341A (en) * 2018-05-22 2018-10-12 中冶建工集团有限公司 The construction method of high-rise building box-structure conversion layer
CN109057149A (en) * 2018-09-18 2018-12-21 中国铁路设计集团有限公司 A kind of steel reinforced concrete conversion beam and its inverted order construction method
CN109235898A (en) * 2018-09-19 2019-01-18 哈尔滨工业大学建筑设计研究院 A kind of huge space transformational structure of novel large-span prestressed rigid body and its construction method
CN109235898B (en) * 2018-09-19 2020-09-29 哈尔滨工业大学建筑设计研究院 Large-span prestress rigid body giant space conversion structure and construction method thereof
CN111962675A (en) * 2020-08-20 2020-11-20 泰宏建设发展有限公司 Construction method of large-span special-shaped cast-in-place reinforced concrete open-web truss

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