In assembling type to build construction, quality control is the crucial link that assembles type to build application, how to make corresponding settlement according to influencing factor measure is attached most importance to especially should.
Assemble type to build construction quality to control a point
1. prefabricated components enters the arena examine
Total number answers to check exterior quality when prefabricated components enters the arena, must not have serious flaw, and not due and common flaw.
Blemish of structural exterior quality
Control of 2. hoisting precision and school nucleus
The precision that the control of hoisting quality is measuring at construction mainly commands a respect. Spell the close sex of outfit to achieve component part whole, avoid to tolerance is worth and make more than because of accumulative total error follow-up component cannot the occurrence of the problem such as normal hoisting perch, the beard before hoisting undertakes serious reinspecting to all hoisting control line, the beard after component part installs perch is pledged by project ministry check member the installation precision that checks and accept component part jointly with inspect manage engineer. Installation precision signs via checking and accept the Fang Kejin after passing issues working procedure construction all right.
Assemble seat of type construction component part and permissible variation in dimension and law of check proved recipe
Quality common fault reachs measure of prevention and cure
Short of of 1. prefabricated components age asks to be installed, quality problem appears after causing individual component to install.
Measure of prevention and cure
Before prefabricated components is being installed, the concrete strength of prefabricated components should accord with design requirement. When the design does not have specific requirement, concrete shoulds not be with conditional cube compressive strength 75% what be less than value of concrete strength grade.
2. installs precision difference, wallboard, hang board axes slants, wallboard and wallboard aperture and photograph adjacent differ big, wallboard and cast-in-place structure fault high to seam etc.
Measure of prevention and cure
1) before assembling type construction construction, appropriate choice has representative unit or component part undertakes trying installing, according to trying installation the result adjusts perfect the programme of construction in time, decide construction craft and working procedure;
2) before installing construction, should ask by working procedure the examination checks already the quality of part of the construction construction that finish, measure after putting a line, make mark of fine installation fixed position;
3) nucleus of school of hoisting of aggrandizement prefabricated components and adjust: Elevation of installation position, installation, verticality, accumulative total verticality answers to undertake after the vertical stroke such as prefab wallboard, prefab column installs to component part school nucleus and adjust: Prefab superposition kind elevation of installation position, installation is answered to undertake after the component part, transverse component such as prefab bridge is installed school nucleus and adjust; Photograph adjacent is prefab board kind component part, answer photograph adjacent dimension of prefabricated components flatness, tall difference, flat-fell seam undertakes school nucleus and adjust; Prefab the integrality that decorates kind of component to answer adornment face undertakes school nucleus and adjust;
4) control of quality of aggrandizement installation process and check and accept, raise installation precision.
Dimension of 3. superposition floor and bridge of development of reinforcing steel bar, wall does not accord with a requirement; Processing is seamed between superposition floor bad, cause later period craze; The floor after superposition floor is installed produces small break.
Measure of prevention and cure
1) of superposition floor prefab board board end and pedestal (Liang Huo cuts force fence) lay aside length not to answer little at 15mm;
2) board end pedestal place, prefab board the cast-in-place concrete that the appropriate of fore-and-aft reinforcing steel bar getting power inside is extended from board end and anchor enters pedestal bridge or wall in the layer, length of anchorage inside pedestal solid should not be less than 5d and appropriate has extended pedestal center line. One-way and prefab board place of board side pedestal, reinforcing steel bar can be not extended, pedestal place appropriate is stuck prefab board end face installs add reinforcing steel bar in cast-in-place concrete;
3) one-way and prefab the detached type juncture that furls plywood board side should configure add reinforcing steel bar, embed with appropriative seam mortar to embed seam;
4) pattern plate is propped up, remove arch and form removal to undertake be controllinged strictly, in case the floor after superposition floor is installed produces break.
4. installs ordinal mistake, superposition stair puts difficulty to wait, and prize of the chaos when the worker is operated is installed forcedly, bring about reinforcing steel bar to slant, component part installs precision difference.
Measure of prevention and cure
Strengthen technical tell sb one's real intentions, press program installation strictly, can go up in computer with BIM technology to complex contact first imitate, install again.
Grouting of sleeve of 5. reinforcing steel bar joins or anchor of oar of reinforcing steel bar builds the join reinforcing steel bar that receives one after another to slant, installation is difficult, affect join quality.
Measure of prevention and cure
1) stand to answer to reinforcing steel bar of prefab wall obligate and hole position, dimension accurate;
2) ? Take the auxiliary step such as fixed position wearing or grille net, raise precision, make sure position of obligate reinforcing steel bar is exact. To slanting individually reinforcing steel bar should take effective measures in time to handle.
Space block of 6. wallboard make level is non-standard, form a vesicle is non-standard.
1) appropriate of space block of wallboard make level uses make level of bolt space block, copy direct at ordinary times roll to adjust bolt, to its make level.
2) the special quality that formulate grouting operation answers before form a vesicle assures measure, whole process of operation of form a vesicle is due full-time examines to personnel is in charge of the spot supervising and withhold video data;
3) makings of form a vesicle should press the dosage that matchs material of metriccer than the requirement grouting and water, via its determining after mix is even flow spends contented standard the requirement is rear but perfusion;
4) exercise of form a vesicle should adopt the law that press an oar from perfusion leaving an opening, should seal in time from able to read aloud fluently is poured out of when oar makings, hold after pressing 30s, seal again block next mouths up;
5) exercise of form a vesicle should make servy record of good construction quality in time, every job class should make a group and every do not answer little at × of 3 groups of 40 ㎜ the cuboid test specimen of 160 ㎜ of 40 ㎜ × ;
6) when form a vesicle works, should make sure oar makings condenses in 48h temperature of place of the join in sclerotic process not under 10 ℃ .
Before 7. cast-in-place concrete is pouring, pattern plate or joint aperture are sealed bad, some takes department of cast-in-place structure root with foaming agent, some, affect impressions and join quality.
1) pouring before concrete, pattern plate or joint aperture cannot be sealed with foaming agent, because of epispastic material Yi Jin enters cast-in-place structure inside, the proposal uses dozen of glue to seal;
2) pattern plate or joint aperture are sealed should enhance quality control and check and accept, assure cast-in-place tractor dry mass.
Craze of wallboard of 8. superposition floor, superposition, of superposition floor ask join seams craze, hang outside board interstitial, hang outside board with outside hang board seam, inside partition and circumjacent break.
1) prevention and cure of superposition wallboard craze is main from improve superposition wallboard quality, strengthen enter the arena check and accept, forbid unqualifiedly to use. Superposition wallboard is secured and pouring when concrete due the measure that defends superposition wallboard craze, can use from close-grained concrete. Due and as corresponding as place of join of body of wall of cast-in-place structure, other construction strengthens measure;
2) outside hang board interstitial, hang outside board with outside hang board seam prevention and cure. Raise installation precision, control aperture width, the choice is embedded suitably seam material and fluid sealant. Hang outside board do not get after installation additional stress;
3) inside partition and circumjacent break prevent and cure, inside partition and periphery are due the join such as reinforcing steel bar, keyway, rough surface is tectonic measure. Aperture should choose to be embedded suitably seam data processing, use network of reinforcing steel bar piece or cloth of alkali resistance net fills strong;
4) strengthen finished product protection, forbidden groovy burrow leaves when prefabricated components.
