CN103603494B - A kind of ultra-thin steel truss sloping core construction method and formwork structure - Google Patents

Abstract

<b>The invention discloses a construction method and structure of an ultra-thin steel truss inclined wall. The method is to fix the connecting members on the upper structure and the lower structure; the outer side of the inclined wall adopts the steel truss formwork as the supporting member, and the two ends of the steel truss formwork are connected with the connecting members on the upper structure and the lower structure as the outer support of the inclined wall Formwork; the inner side of the wall adopts ordinary formwork; the ordinary formwork and the reinforced truss formwork are connected by tension screws; the concrete pouring adopts self-compacting concrete. The invention adopts the steel bar truss formwork as the support on the outside of the inclined wall, and the inner side of the inclined wall still adopts the common formwork, which solves the difficult problem in the support of the inclined wall in building construction. The invention has the advantages of simple technology, high on-site installation efficiency, reliable quality, short construction period, low labor intensity, and labor force can be arranged for construction at the same time; materials can be processed in the material processing site, and assembly work can be directly carried out on site, saving the construction period; construction The quality has reached the design requirements. </b>

Description

Construction method and template structure of ultra-thin steel truss inclined wall

technical field

The invention relates to an ultra-thin steel truss inclined wall construction method and a formwork structure, belonging to the technical field of inclined shear wall formwork support in construction engineering.

Background technique

In the construction of construction projects, it is often encountered that there is a need to carry out a large number of inclined wall constructions with a thickness of about 150mm in the backing part of the construction project. At present, during construction, the conventional formwork support systems used mainly include steel pipe formwork support systems, bowl-shaped formwork support systems, and self-jacking climbing formwork support systems. Since the wall is an inclined structure and the outside of the wall is a mountain, if steel pipe formwork support system or bowl-shaped formwork support system is used, the vertical rod of the bracket needs to be supported on the mountain outside the wall, which has certain safety hazards; The wall is post-construction, and it will be difficult and costly to erect using the climbing formwork system. Therefore, the existing inclined wall construction methods are not ideal.

Contents of the invention

The object of the present invention is to provide an ultra-thin steel truss slanted wall construction method and formwork structure to solve the problems in the slanted wall support during the building construction process, ensure construction safety and construction quality, and overcome the deficiencies of the prior art.

Technical scheme of the present invention:

A construction method for an ultra-thin steel truss inclined wall, the method is to fix connecting members on the upper structure and the lower structure; the outer side of the inclined wall uses a steel truss formwork as a supporting member, and the two ends of the steel truss formwork are connected to the upper structure and the lower structure The connecting member is connected as the external support formwork of the inclined wall; the inner side of the wall adopts the ordinary formwork; the ordinary formwork and the reinforced truss formwork are connected by tension screws; the concrete pouring adopts self-compacting concrete.

In the aforementioned method, the model of the steel truss formwork is TD7-120; the steel truss formwork is laid piece by piece along the length direction of the inclined wall, and the wooden formwork is used for laying when the width of the remaining gap is less than one steel truss formwork width.

In the aforementioned method, the concrete pouring adopts layered pouring, and the height of each pouring does not exceed 3m.

In the aforementioned method, the upper structure and the lower structure are reserved for planting bars during construction, and the planting bars are welded or bound to the steel bar truss formwork and the steel mesh in the inclined wall.

In the aforementioned method, the joint between the steel truss formwork and wood formwork and the superstructure and substructure is filled with a foaming agent to prevent grout leakage.

The ultra-thin steel truss slanted wall formwork structure formed according to the aforementioned method includes connecting members respectively fixed on the upper structure and the lower structure, and the connecting members respectively fixed on the upper structure and the lower structure are connected through a steel truss formwork, and the steel truss The inner side of the formwork is provided with a common formwork, and the reinforced truss formwork and the ordinary formwork are connected and reinforced by tension screws.

In the aforementioned structure, the connecting member includes a set of fixing plates and a support plate, and a set of fixing plates are evenly distributed along the length direction of the inclined wall, and the fixing plates are respectively connected with the upper structure or the lower structure through expansion bolts; the length of the support plate and the inclination The length of the wall is equal, and the support plate is welded to the fixed plate according to the inclination angle of the inclined wall; the two ends of the steel bar truss formwork are respectively connected and supported on the fixed plate and the support plate.

In the aforementioned structure, a reinforcing plate is provided on the fixing plate.

In the aforementioned structure, the common template is a nine-layer board with a thickness of 18mm, and the back of the common template is provided with a set of vertical back corrugations and a set of horizontal back corrugations; the distance between the bottommost horizontal back corrugations and the upper surface of the lower structure is 150-200mm .

In the aforementioned structure, the vertical back flute is a long wooden square, and the horizontal back flute is a double steel pipe; a set of double steel pipes is provided between the double steel pipes, and a butterfly buckle is provided at one end of the double tension screw, and the butterfly buckle is connected with the horizontal back flute. The other end of the pull screw is connected with the steel truss template.

Compared with the prior art, the present invention adopts the steel bar truss formwork as the support on the outside of the inclined wall, and the inside of the inclined wall still adopts the common formwork. Construction safety and construction quality. The application test of the present invention in the construction of No. 1 office building of Huaguoyuan Project in Guiyang proves that the present invention not only has the advantages of good construction quality, reliable structure, and good stability, but also has the advantages of simple technology, high on-site installation efficiency, and engineering Reliable quality, short construction period, low labor intensity and other advantages. By adopting the invention, labor force can be arranged to carry out construction at the same time; materials can be processed in the material processing field, and assembly work can be carried out directly on site, which saves the construction period; and the construction quality can fully meet the design requirements.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a schematic diagram of the connection between a common formwork and a reinforced truss formwork;

FIG. 3 is a front view of FIG. 2 .

The marks in the drawings are: 1-upper structure, 2-lower structure, 3-reinforced truss formwork, 4-common formwork, 5-tie screw, 6-fixing plate, 7-supporting plate, 8-expansion bolt, 9 -Reinforcing board, 10-vertical back flute, 11-horizontal back flute, 12-butterfly buckle.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, but not as any limitation to the present invention.

An ultra-thin steel truss inclined wall construction method, as shown in Figure 1-3. The method is to fix the connecting members on the upper structure and the lower structure; the outer side of the inclined wall adopts the steel truss formwork as the supporting member, and the two ends of the steel truss formwork are connected with the connecting members on the upper structure and the lower structure as the outer support of the inclined wall Formwork; the inner side of the wall adopts ordinary formwork; the ordinary formwork and the reinforced truss formwork are connected by tension screws; the concrete pouring adopts self-compacting concrete. The model of the steel truss formwork is TD7-120; the steel truss formwork is laid piece by piece along the length direction of the inclined wall, and the wooden formwork is used for laying when the width of the remaining gap is less than one steel truss formwork width. The concrete pouring adopts layered pouring, and the height of each pouring does not exceed 3m. The upper structure and the lower structure are reserved for planting bars during construction, and the planting bars are welded or bound (preferably welded) to the steel truss formwork and the steel mesh in the inclined wall. The joint between the steel truss formwork and wood formwork and the superstructure and substructure is filled with a foaming agent to prevent grout leakage.

A kind of ultra-thin steel truss slanted wall formwork structure of the present invention formed according to the above method, as shown in Figure 1-3, the structure includes connecting members respectively fixed on the superstructure 1 and the substructure 2, respectively fixed on the superstructure 1 and the connecting members on the substructure 2 are connected and reinforced by steel truss formwork 3 , the inner side of steel truss formwork 3 is provided with ordinary formwork 4 , and steel truss formwork 3 and ordinary formwork 4 are connected by tension screw 5 . The connecting member includes a set of fixing plates 6 and support plates 7, and a set of fixing plates 6 are evenly distributed along the length direction of the inclined wall, and the fixing plates 6 are respectively connected with the upper structure 1 or the lower structure 2 through expansion bolts 8; the support plates 7 The length is equal to the length of the inclined wall, and the support plate 7 is welded with the fixed plate 6 according to the inclination angle of the inclined wall; the two ends of the steel bar truss formwork 3 are respectively connected and supported on the fixed plate and the support plate. A reinforcing plate 9 is provided on the fixing plate 6 . The common template 4 is a nine-layer board with a thickness of 18mm. The back of the common template 4 is provided with a group of vertical back corrugations 10 and a group of horizontal back corrugations 11; ~200mm. The vertical back flute 10 is a long wooden square, and the horizontal back flute 11 is a double steel pipe; a group of double-steel steel pipes is provided with a pair of pull screws 5, and one end of the double pull screw 5 is provided with a butterfly buckle 12, and the butterfly buckle 12 is connected to the horizontal back flute 11. Connection (that is, the butterfly buckle 12 is fastened on the horizontal back corrugated 11), and the other end of the tension screw 5 is connected to the steel truss formwork 3 (that is, the other end of the tension screw 5 is welded to the upper chord or lower chord on the steel truss form 3 ).

Example

The specifications of the components in this example are as follows:

The model of steel truss formwork 3 is TD7-120 steel truss formwork; the fixed plate 6 is made of 150X50X10mm steel plate with a spacing of 500mm; the reinforcement plate 9 is made of 150X50X10mm steel plate with a space of 500mm; The specification of the bolt 8 is Φ19X400; the horizontal back flute 11 adopts double steel pipes, and the steel pipe specification is Φ48X3.6mm; the vertical back flute 10 adopts 40X90 wooden squares, and the horizontal distance is 200mm; Φ14 screw rod, the length is greater than the thickness of the wall plus the thickness of the formwork on both sides, and the horizontal distance is 500mm; the butterfly buckle 11 adopts the butterfly buckle matched with the Φ48 steel pipe.

During specific implementation, as shown in Figure 1-Figure 3, it can be implemented according to the following steps:

1. Reserving steel bars for inclined walls

The vertical reinforcement of the inclined wall is reserved in the upper and lower structural beams; in order to ensure the stress of the reinforcement on the inclined wall, the horizontal distribution of the reinforcement on the inclined wall needs to be planted. Depth meets specification requirements.

2. Install the fixed plate

The fixing plates 6 are fixed at intervals of 500 mm along the length direction of the inclined wall, and are fixed with expansion bolts. The supporting plate 7 and the reinforcing plate 9 are welded with the fixing plate 6, and the weld seam is full welding, and the supporting plate 7 is used for fixing the steel bar truss formwork 3.

3. Laying steel truss formwork

Starting from one side, lay the first steel truss formwork 3 close to the structure, and connect the adjacent steel truss formworks with buckle grooves, and lay them piece by piece. If the width of the gap on the other side is smaller than the width of a single steel truss formwork, a wooden formwork can be used Laying is carried out; the upper and lower sides of the steel truss formwork are welded on the connection member formed by the fixed plate 6, the support plate 7 and the reinforcement plate 9; the gap between the steel truss formwork 3 and the structure can be filled with a foaming agent to prevent grout leakage during pouring.

4. Bind the reinforcement mesh in the inclined wall on the reinforcement truss formwork 3. The reinforcement mesh is bound together with the vertical reinforcement and planting bars in the upper and lower structures, and is bound together with the reinforcement truss on the reinforcement truss formwork 3.

5. Fix the ordinary formwork on the inner side of the steel truss formwork

Ordinary formwork 4 adopts 18 thick nine-layer boards, vertical back corrugation 10 adopts 40×90200 wooden squares, horizontal back corrugation 11 adopts Φ48×3.6 double steel pipes, the distance is 500m, and the bottom horizontal back corrugation is 200mm from the ground. Using Φ14 pull screw.

6. Pouring concrete, inclined wall construction completed

The self-compacting concrete is poured by artificial feed truck or pump pipe, and poured in layers, each pouring shall not exceed 3m.

Claims (10)

1. a ultra-thin steel truss sloping core construction method, is characterized in that: the method is dead joint member in superstructure and substructure; The outside of inclined wall adopts reinforcement bar truss mould plate as supporting member, and reinforcement bar truss mould plate two ends are connected the outer support template as inclined wall with the connecting elements in superstructure and substructure; The inner side of body of wall adopts common templates; Be connected by Screw arbor with nut at both-ends between common templates with reinforcement bar truss mould plate; Concreting adopts self-compacting concrete.

2. method according to claim 1, is characterized in that: the model of described reinforcement bar truss mould plate is TD7-120; Reinforcement bar truss mould plate is laid piecewise along inclined wall length direction, lays when remaining a short of width reinforcement bar truss mould plate width in space with wooden form.

3. method according to claim 1, is characterized in that: described concreting adopts placement layer by layer, builds at every turn and is highly no more than 3m.

4. method according to claim 1, is characterized in that: described superstructure and substructure reserve bar planting when constructing, and bar planting is welded with the steel mesh reinforcement in reinforcement bar truss mould plate and inclined wall or colligation is connected.

5. method according to claim 1, is characterized in that: described reinforcement bar truss mould plate and wooden form and the junction blowing agent between superstructure and substructure are filled, with mortar leakage prevention.

6. the ultra-thin steel truss sloping core formwork structure of an either method formation according to claims 1 to 5, it is characterized in that: comprise the connecting elements be separately fixed in superstructure (1) and substructure (2), be separately fixed between the connecting elements in superstructure (1) and substructure (2) and connect through reinforcement bar truss mould plate (3), the inner side of reinforcement bar truss mould plate (3) is provided with common templates (4), and reinforcement bar truss mould plate (3) and common templates (4) are through Screw arbor with nut at both-ends (5) reinforcement by connection.

7. structure according to claim 6, it is characterized in that: described connecting elements comprises fixed head (6) and gripper shoe (7), fixed head (6) is uniform along inclined wall length direction, and fixed head (6) is connected with superstructure (1) or substructure (2) respectively through expansion bolt (8); Length and the inclined wall length of gripper shoe (7) are isometric, and gripper shoe (7) is welded with fixed head (6) by the angle of inclination of inclined wall; Described reinforcement bar truss mould plate (3) two ends connect respectively and are supported in fixed head (6) and gripper shoe (7).

8. structure according to claim 7, is characterized in that: described fixed head (6) is provided with stiffener (9).

9. structure according to claim 6, is characterized in that: described common templates (4) for thickness be nine laminates of 18mm, the back side of common templates (4) is provided with one group of vertical back cord (10) and one group of horizontal back cord (11); The horizontal back cord (11) of bottommost is 150 ~ 200mm apart from substructure (2) upper surface distance.

10. structure according to claim 9, is characterized in that: described vertical back cord (10) is long flitch, and horizontal back cord (11) is two steel pipes; Be provided with one group of Screw arbor with nut at both-ends (5) between two steel pipe, Screw arbor with nut at both-ends (5) one end is provided with butterfly button (12), and butterfly button (12) is connected with horizontal back cord (11), and Screw arbor with nut at both-ends (5) other end is connected with reinforcement bar truss mould plate (3).