Foundation construction program

Foundation template construction program (a)

First, the template and support material requirements

(1), steel templates

(2), wood square: 50 × 100 or 60 × 80 fir square or pine square;

(3), support tail diameter: Ф10 above the steel pipe support.

Second, operating conditions

(1), wood template preparation: the number of templates according to the design program combined with the requirements of the construction progress to consider, and reasonably determine the amount of templates.

(2), according to the requirements of the drawings, play a good axis and template edge line, set a good level of elevation control points.

(3), rebar binding is completed, water, electricity pipes, buried parts have been installed, reinforcing steel protective layer pads placed, and do a good job of hidden acceptance procedures.

(4), in accordance with the requirements of the drawings and process standards, to the construction team for safety and technical delivery.

Third, the template preparation and installation requirements

(1), template preparation requirements

①, according to the size of the drawings on-site preparation template.

②, the project uses steel template construction, the steel used shall not be bent, rusted steel, and templates are required to brush oil before use.

③, side mold, bottom mold: steel mold plate

④, bottom flute, file: 50 × 100 or 60 × 80 fir square or pine square; support the tail diameter: Ф10 above the steel pipe support.

(2), template installation requirements

①, to ensure that the structure and components of each part of the correct shape, size and location of each other.

②, with sufficient load-bearing capacity, rigidity and stability, can reliably withstand the self-weight and lateral pressure of the poured concrete and the load generated in the construction process.

③, easy to install and dismantle, can be used for multiple turnover.

④, the formwork joints are tight, no slurry leakage.

⑤, the support must be installed on a solid foundation and have enough supporting area to ensure that the poured structure will not sink, crack, sand or bulge.

⑥, according to GB50204-92, the permissible deviation of cast-in-place structural template installation shall comply with the following provisions:

Note: When checking the axial position, it should be measured along the longitudinal and transverse directions, and take the larger of these values.

Fourth, independent foundation template construction method

Step-shaped foundation template each step template has four side mold nailed together, two of the side plate size and the corresponding step side dimensions are equal. The four side boards are assembled into a box with wooden files. On the upper step template of which two side mold of the lowest piece of splicing plate to lengthen (sedan chair wood), in order to rest on the lower step template, the lower step template should be surrounded by diagonal braces and flat braces. One end of the diagonal brace and flat brace is nailed to the side board on the wooden file (ribs file), and the other end is tightened on the wooden pile. The upper step should also be supported by diagonal braces and flat braces, diagonal braces and flat braces nailed to the end of the step side board on the wood file, the other end can be nailed to the top of the lower step side board on the wood file or on the stake.

Template installation, first in the side plate inside the center line, the steps of the side plate into a box, and then the next step of the template placed in the bottom of the pit, the two center line aligned with each other, and use a level to correct its elevation, around the template nailed to the stake, a good support fixed. The upper step template and the lower step template installed together, the same method.

Fifth, the strip form of foundation template construction method

strip form of foundation template is mainly composed of side panels, clamping wood and diagonal support, the foundation side of the template are added wood file spelling or using the whole plate, template installation, first according to the construction drawings of the parts of the open template spelled out as a square box, in the lower end of the upper and lower end of the side of the template plus the installation of the square wood bar, and then put together the template according to the central axis of the bottom of the pit and correct its elevation with the level ruler, in the template. Calibration of its elevation, in the template around the stake, reinforcement template, the first use of pine boards according to the width of the base of the two sides of the mold fixed, and then set up diagonal braces and flat brace, diagonal braces and flat braces nailed to one end of the stake, and the other end nailed to the upper and lower ends of the side plate square wooden bars, in the setting up of diagonal braces and flat braces, according to the center line of the axis of the control line, the manipulation template position is correct.

Six, the foundation beam template construction method

beam template is mainly composed of side plate, base plate, clamping wood, wood, diagonal support.

Side plate and bottom plate are added with wood file splicing or using the whole plate. There is a concrete pad, only the side plate, clamping wood in the beam mold on both sides of the board below the beam side plate and bottom plate clamping, and nailed to the top brace. There is no concrete bedding at the bottom of the beam under the bottom plate supported by the top brace. In the main beam at the junction of secondary beams, the main beam side plate should be left on the notch, and nailed to the liner file, secondary beam side plate and bottom plate nailed to the liner file.

The spacing of the top brace should be determined according to the size of the beam section, generally 800 ~ 1200mm. diagonal braces nailed to the upper end of the joist, the lower end nailed to the stake. Between the top brace should be set up horizontal tie or scissor braces to maintain the stability of the top brace.

When the beam height above 700mm, in the middle of the beam with a wire through the crossbar on the pull, or with bolts on both sides of the template tight (on the bolt), to prevent the template under the mouth of the outward bursting and expansion of the middle.

After the installation of the beam template, the center line should be pulled to check, check the center position of each beam mold is correct. Whether the support system is stable.

VII, template removal

(1), timely removal of the template, will be conducive to the turnover of the template and accelerate the progress of the project, the removal of the template to master the timing, the concrete should be made to achieve the necessary strength, according to the provisions of GB50204-92, the cast-in-place concrete structure demolding the strength of the requirements of the provisions should be consistent with the following table:

(2), the side of the mold in the strength of the concrete can ensure that Its surface and corners are not damaged by the removal of the template before removal.

(3), the bottom of the mold before the removal of the concrete with the condition of the curing test block test pressure report and application for dismantling the mold, can be dismantled only after approval.

(4), the template removal should be carried out by the mold support personnel, according to the principle of first support and then dismantle, after the support and then dismantle the first, in order, step by step, should not hit and pry.

(5), the removal of mold should try to avoid damage to the concrete surface or template, pay attention to the whole piece of falling injuries. Remove the template, there are nails, to make the nail tip down, so as not to tie feet. After dismantling, should be cleaned up in a timely manner, according to the type and size of the stacked separately, so that the next use.

Eight, quality control

(1), before the installation of the template, to clean up, evenly coated with isolator.

(2), the mold should be checked to ensure that the position, elevation and size of the components are correct.

(3), when the beam span more than 4m, according to the specification requirements of the beam span in the middle of the bottom mold should be arched 1 ‰ ~ 3 ‰, the longitudinal spacing of the top brace does not exceed 500mm, and a separate additional horizontal brace.

(4), when the beam height is large, the beam height in the middle and the upper end of the other additional purlin, to prevent the pouring of concrete when the beam side mold due to impact and lateral pressure.

(5) All templates should be installed with tight joints to prevent slurry leakage.

(6), in order to prevent the root of the beam plate from moving out, it is necessary to encrypt the fence if necessary, that is, to narrow the distance from the file.

(7), pouring concrete, pay attention to the observation of the template, once found displacement, burst mold, sinking, leakage of slurry, support loosening and other phenomena should be timely and effective measures to prevent the expansion of such phenomena.

(8), the removal of load-bearing components of the bottom of the mold support, to obtain the consent of the full-time constructor, and for the removal of the top of the visa approval procedures, before removal. According to the strength of the demolding test block to determine the time of demolding, to reach the design strength of 100% in order to dismantle all the support top support.

Nine, safety, civilized construction technical measures

(1), the support shall not use rot, warping, dark injury and poor wood wood and board.

(2), the removal of mold once removed, shall not be left unsupported template.

(3), mold demolition is strictly prohibited when throwing templates and supporting steel pipe, components.

(4), the use of the hammer and other tools, wooden handle to be installed firmly, the operation, the hand should be held tightly, to prevent the tool off the handle or out of hand injury.

(5), the demolition of the template to remove the top of the cement paste in a timely manner, such as defects, warping cracks, off the edge of the concentration of special rectification. Pry up the nails centrally stacked underneath with a plate pad leveling.

(6), the template should be installed in time to take measures to remove the board sawdust, shavings, wood and other debris. After removing the template, all the scattered components should be collected in a timely manner, so that the site is clear after the work.

Basic template construction program (2)

I, the preparation of the description

1, Xi'an University of Electronic Science and Technology, 48 # high-rise residential for the annexed six-level air defense basement, with a protection unit, sheltering area of about 1000 square meters, respectively, the height of the floor 3.7m, the thickness of the shear wall were 700. 550, 300, 250, 200, 250, 200, 550, 300, 250, 200mm.

2, the project basement template using multi-layer board and 850 × 850 wood square combination of formulated wood mold and bamboo glue board, support system using steel pipe support, wood template reinforcement using tensile bolts.

3, the preparation of the basis

4, Xi'an University of Electronic Science and Technology 48 # high-rise residential building construction drawings.

5, GB50204-** "concrete structure engineering construction and acceptance norms" and relevant state regulations and the actual situation of the project and the experience of similar projects.

6, Xi'an University of Electronic Science and Technology 48 # high-rise residential building construction organization design.

Second, the template design

1, the design principles

strive for simple structure, easy to install and remove, does not interfere with the reinforcement tying, solid support and ensure that the concrete pouring does not leak slurry.

Ensure that the shape and size of the components of the structure and the correct position of each other.

Sufficient strength, rigidity and stability to reliably withstand the weight of freshly poured concrete and lateral pressure, as well as the load generated during construction.

2, template design

(1) wall template design:

① Selected wood mold vertically arranged, in order to avoid drilling holes randomly in the wood mold, in the middle of the two boards set up 140 series of template drilling so that the vertical through the wall bolts to reduce the consumption of templates. The supporting system of the formwork adopts φ48 steel pipe for supporting, and there are two φ48 steel flutes inside and outside, the inner steel flute is set horizontally with the spacing of 300-400mm; the outer steel flute is set vertically to bear the load coming from the inner steel flute, with the spacing of 650mm.

According to the specific dimensions of the wall in the construction drawings, the boards of each room will be grouped to match the design and the design of the design size templates will be used in longitudinal splicing, and the design size templates will be used to match the design size templates to match the design. Design size template longitudinal splicing using staggered arrangement to ensure the overall rigidity of the template.

② wall Ф12 tensile bolts (with water stops for the basement wall part) pulling, basement construction demolding, with a cutting machine to cut off the protruding part of the waterproof mortar smoothing; above ground part of the basement wall, in the bolt outer jacket 16mm PVC pipe, demolding will be withdrawn from the bolts can be reused.

Tie bolts horizontal spacing of 300-400, vertical spacing of 650, the basement wall for the seepage-resistant concrete, the middle of the outer wall tie bolts must be welded water ring, water ring and bolts must be all full welding between the tie rod nut with thickened nuts, the following three rows with double nuts. See the following chart:

(2) foundation beam template design:

The project foundation beam using P3015 steel template transverse support, for insufficient modulus with a small template assembling (plate between the gap between the 1CM thick sponge strips). Supported in strict accordance with the axis labeled on the steel pull-through line. Horizontal reinforcement using long steel pipe back on the steel mold (upper, middle and lower three). Vertical use of short steel pipe, one end fixed with tie sheet, clamped in the template, the other end fixed with short steel pipe (horizontal spacing 600MM), as follows:

Steel pipe 600 spacing base beam steel pipe 600 spacing

Tie sheet 600 spacing

Schematic diagram of the support of base beam template

(3) Beam, plate template design:

① In order to ensure that the beam, plate bottom flat, smoothness to meet the requirements of water without painting, beam, plate template using 12mm thick laminated mirror bamboo glue board and 50 × 100mm, 100 × 100mm wooden keel, standard steel pipe scaffolding support system.

② top plate mold and wall joints, with a 25mm wide and 21mm deep wood square, instead of the plate mold, the plate mold over the mouth of the enterprise, the plate mold and wood contact pads to sponge strips, to prevent the leakage of slurry wood clamped to the wall with a fixture, as shown in the figure.

③ All wood mold 'joints and beams, board corners are sticking sponge to prevent slurry leakage.

(4) window and door opening template design:

① window and door opening templates using a combination of steel and wood templates, wood is not easy to deform the red and white pine, the surface is covered with 12mm thick coated with mirrored bamboo vinyl sheet, the corners of the corner of the corner of the corner of the corner of the corner of the corner of the corner of the corner of the corner of the corner of the corner of the L150 × 150 × 6 angle connectors. At the same time, the hole template internal support (transverse and diagonal bracing, using angle steel), to ensure that the size of the window and door opening is accurate, to meet the window and door templates can be assembled easy to dismantle without deformation requirements.

② exterior wall template construction, set up on both sides of the template plus limit reinforcement, the bottom of the locating reinforcement, to ensure the accuracy of the position of the door and window holes, the upper and lower door and window holes plumb line support, to ensure that the exterior doors and windows in a plumb line position.

③ All steel and wood structures are connected by bolts.

④ window and door opening templates in the window and door installation position, pre-fixed installation of 10mm thick and window and door thickness of the same width of the rigid plastic plate, plastic plate to leave out the mouth of the enterprise, in the removal of the concrete after the installation of windows and doors and to avoid the plastering process.

(5) Staircase template design:

Staircase base plate template adopts 18 mm thick laminated mirror bamboo glue board, 60×80mm wooden keel, standard steel pipe scaffolding. When the concrete is poured, no construction joints are left on the sloped slab, and the stair treads are supported at one time. The bottom drip line position of the tread plate makes a groove, realizing the drip line and the tread plate construction is completed once, avoiding the later painting manual operation caused by hollow drums, cracks and other quality problems.

(6) key note

All templates in contact with concrete in this project should be painted with isolator before assembly. Wooden molds are made pressure planing treatment. All template joints and corners are sponge strips and adhesive tape.

Fourth, the template installation

1, the first pop-up axis, template edge line and 200 from the edge of the control line, good elevation control, the bottom of the template should be a good leveling layer.

2, set the template positioning reference: in order to ensure the thickness of the wall, welded φ10 rebar braces on the wall bars, the length of which is equal to the thickness of the wall, in order to ensure that the template and rebar position is correct.

3, check the required specifications of the template quality surface must be flat, and brush the mold release agent in advance, is strictly prohibited to brush the waste machine oil.

4, according to the design of the board sequential assembly. Ensure that the template position is accurate and the overall stability of the template system, and the assembly should be symmetrical placement of the template on both sides.

5, the installation of wall mold tie bolts, should be straight relative to the interspersed bolts shall not be diagonally pull hard top, drilling pre-processed with a bench drill.

6, according to the location line first installed doorway template, buried iron, etc..

7, template installation, should be calibrated while in position, and then install a variety of connectors, support pieces or add temporary support.

8, the steel flute should use the whole rod, joints should be staggered.

9, between the steel mold may be poorly spliced leakage of slurry. In order to solve this problem, double-sided adhesive sponge strips can be clamped between the two steel molds to ensure that the joints are tight.

10, the same seam on the U-shaped card, should not be clamped in the same direction.

Third, the template installation quality requirements

1, the organization of steel template installation is completed, should be in accordance with the "acceptance specification for the construction of concrete structures" and "combined steel mold technical specifications" of the relevant provisions of the comprehensive inspection, acceptance can only be carried out after the next process.

2, a variety of connectors, support parts, reinforcing accessories must be installed firmly, no loose phenomenon, the template seam should be tight.

3, pouring concrete, should be set up to guard the template, such as template tilt, displacement, local bulging, should be taken in a timely manner to take fastening measures.

4, template installation tolerance

No. item? Allowable deviation (mm)

1 Axis position 5

2 Internal dimension of section (wall) +4, -5

3 Difference in height between two adjacent board surfaces 2

4 Surface leveling (2m length) 5

4, removal of template

1, removal of side molds should be done in a way that ensures that the concrete surface and corners will not be damaged and that the concrete will not be damaged. Surface and corners are not damaged and have a certain strength shall prevail.

2, the order and method of removal of the template should be in accordance with the provisions of the design of the board to follow the first support and then dismantle the template, dismantle the mold, it is strictly prohibited to use a sledgehammer and crowbar hard smashing and prying.

3, the operator should stand in the safe place when dismantling the mold, so as to avoid safety accidents, to be the piece (section) template all dismantled, before allowing the templates, fittings, brackets, etc., transported to the designated location and stacked neatly.

4, dismantle the template accessories, forbidden to throw, to be picked up by someone to pass, according to the designated location of the stacking, and to do in a timely manner to clean up the mortar, maintenance and painting a good isolation agent, in order to prepare for use.

5, according to the construction experience accumulated in the past, different strength levels of concrete in the summer 12 hours, can reach 1.2Mpa, so in the side mold removal must ensure that its conservation time of 20 hours or more, this strength removal can ensure that the concrete corners are not destroyed.

6, the bottom of the mold removal

Beam plate bottom of the mold removal time should be the same condition of the maintenance test block of the test pressure value of the component demolding strength shall prevail, the same condition of the test block 7 days to send test. No demolding strength report or strength does not meet the requirements for demolding, strictly prohibit demolding.

Fifth, template installation and demolition safety requirements

1, loading and unloading of the template, up and down should be someone to take over, with the demolition of the operation, and should be fixed firmly on the movable parts, templates are forbidden to pile up on the scaffolding board, can not be thrown at random. And should take measures to prevent collision damage template.

2, construction machinery to be operated by specialized personnel.

3, the construction of electricity by a professional electrician to pick up and tear down, other people are not allowed to pick up and tear down, violators will be heavily penalized.

4, construction shall not be thrown into the pit.

5, into the scene of the personnel must wear a good helmet.

6, the operation should always pay attention to the rebar under the feet, in order to prevent tripping, at the same time to pay attention to the pit inside and outside the tower crane running trajectory, in order to prevent bruises and injuries.

Hubei Utopia Xinyu Construction Labor Limited Liability Company Fifth Project Department