CN104675012A - Prefabricated polypropylene fiber sludge ceramsite concrete wall based on serrated racking connection and construction method thereof - Google Patents

Abstract

The invention relates to a prefabricated polypropylene fiber sludge ceramsite concrete wall based on serrated racking connection. The prefabricated steel fiber sludge ceramsite concrete wall comprises prefabricated panels, cast-in-place connection columns, cast-in-place vertical edge components and embedded welding plates, wherein serrated racking structures are arranged on both the left side surface and the right side surface of each prefabricated panel, and horizontal steel bars and vertical steel bars are arranged in each prefabricated panel; the cast-in-place connection columns and the cast-in-place vertical edge components are occluded with the prefabricated panels through the serrated racking structures, longitudinal bars nested with the horizontal steel bars are arranged in the cast-in-place connection columns and the cast-in-place vertical edge components, and the connection structure of the prefabricated panels on the horizontal direction is formed; the embedded welding plates are buried in the bottom surfaces of the prefabricated panels and connected with welding plates arranged on the top surface of a hidden beam in the vertical direction in a welding manner; the prefabricated panels are made of polypropylene fiber sludge ceramsite concrete. The invention further provides a construction method of the prefabricated polypropylene fiber sludge ceramsite concrete wall based on serrated racking connection. Compared with the traditional prefabricated wall, according to the innovations of materials, a connection way and a form of reinforcement, the wall structure has the advantages of energy dissipation, seismic mitigation, ecological environmental protection and rapid construction and is economical and practical.

Description

Prefabricated polypropylene fiber sludge ceramsite concrete wall and its construction method based on horse teeth connection

technical field

The invention belongs to the technical field of construction, and in particular relates to an assembled polypropylene fiber sludge ceramsite concrete wall based on a horse-tooth connection and a construction method thereof.

Background technique

The prefabricated concrete structure meets the social requirements of resource conservation and environmental friendliness put forward in my country's "Twelfth Five-Year Plan", and is one of the effective ways to realize building energy conservation, emission reduction and housing industrialization. In recent years, the country's policy guidance and preferential policies for prefabricated housing have been introduced one after another. The prefabricated integral shear wall structure has been widely used in high-rise residential structures due to its good integrity, high rigidity, and high bearing capacity. At present, the development of prefabricated walls is facing many problems. On the one hand, the materials used in the walls are traditional concrete materials, which makes my country's energy and raw material consumption too large. Therefore, finding new ecological concrete wall materials has become an urgent problem to be solved. . On the other hand, the connection method of the traditional prefabricated shear wall structure needs to be further improved. The current connection method requires high prefabrication precision of components and takes a long time to install the holes, which greatly delays the construction period and increases the project cost. Therefore, it is necessary to The connection structure used in traditional prefabricated shear walls is improved, and a prefabricated wall connection structure with simple structure, reasonable design, convenient construction, low investment cost and good use effect is proposed. Finally, the structural integrity of the traditional prefabricated shear wall is poor, and the structural system lacks multiple fortification anti-seismic mechanisms. The failure of a single shear wall is mainly shear brittleness, which is difficult to meet the ductility design requirements of the structure. The reinforcement form of the force wall is optimized and innovated, and a prefabricated wall reinforcement form with good ductility, uniform energy-dissipating cracks, and excellent cooperative performance with vertical edge components is proposed.

Contents of the invention

In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of assembly type polypropylene fiber sludge ceramsite concrete wall body and construction method thereof based on the horsetooth bridge connection, through the material, connection mode, reinforcement form Innovation makes this wall structure have the advantages of energy consumption and shock absorption, eco-environmental protection, rapid construction, and economical and practical advantages compared with traditional prefabricated walls.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A prefabricated polypropylene fiber sludge ceramsite concrete wall based on horsetooth connection, including:

Prefabricated wall panels 1, the left and right sides of which are provided with horse-toothed structures 13, built-in horizontal reinforcement bars 11 and vertical reinforcement bars 12;

The cast-in-place connecting column 2 is occlusally connected with the prefabricated wall panel 1 through the horse-tooth structure 13, and the longitudinal reinforcement is built in. The longitudinal reinforcement is nested with the horizontal reinforcement 11, and reliable anchoring is realized by spot welding at the joint, forming The connection structure of the prefabricated wall panel 1 in the horizontal direction;

The cast-in-place vertical edge member 5 is occluded and connected with the outer surface of the edge prefabricated wall panel 1 through the horse-tooth structure 13, and the longitudinal reinforcement is built in, and the longitudinal reinforcement is nested with the horizontal reinforcement 11, and a little Reliable anchoring is achieved by welding to form a connection structure of prefabricated wall panels 1 in the horizontal direction;

The pre-embedded welding plate 3 is embedded in the bottom surface of the prefabricated wall panel 1, and forms a connection structure by welding with the welding plate arranged on the top surface of the concealed beam in the vertical direction;

Wherein, the prefabricated wall panel 1 is made of polypropylene fiber sludge ceramsite concrete, and the proportion of polypropylene fiber sludge ceramsite concrete is:

Each cubic meter of concrete contains: 0.6kg-1.2kg of polypropylene fiber, 516kg of sludge ceramsite, 400kg of cement, 180kg of water and 819kg of sand.

The horizontal and vertical reinforcing bars are in the form of double bars in the left and right directions and front and rear directions of the prefabricated wall panel 1, that is, four horizontal reinforcing bars and four vertical reinforcing bars form a unit, and one prefabricated wall panel 1 has multiple The units are connected in order to form a "well"-shaped reinforcement form in the prefabricated wall panels.

The present invention also provides the construction method of the assembled polypropylene fiber sludge ceramsite concrete wall based on the horsetooth connection, comprising the following steps:

Step 1: Preparation of polypropylene fiber sludge ceramsite concrete

First, mix and stir the polypropylene fiber and sludge ceramsite to disperse the polypropylene fiber in the sludge ceramsite; then mix the obtained mixture with sand and cement, dry mixing first and then water mixing; the mixing time is the same as that of ordinary concrete; finally Obtain polypropylene fiber sludge ceramsite concrete;

Step 2: Prepare prefabricated wall panels 1

First, assemble the steel formwork of the horse-toothed structure 13, bind the steel mesh, bury the embedded welding plate 3, and then pour polypropylene fiber sludge ceramsite concrete to initially form the prefabricated wall panel 1; finally, standard maintenance for 1 to 2 days, demolition Steel formwork to form the concrete wall panels with curbs;

Step 3: Integral pouring of the prefabricated wall

Wet the base of the wall first, lay the mortar at the bottom of the prefabricated wallboard 1; then adjust the positioning and seating of the prefabricated wallboard 1, in the vertical direction, the pre-embedded welding plate 3 is correspondingly welded, and the part without the welding plate is filled with dense mortar; in the horizontal direction Directionally, the cast-in-place connecting column 2 is arranged between the adjacent prefabricated wall panels 1 and is connected to the prefabricated wall panels 1 on both sides through the horse-tooth structure 13, and the cast-in-place vertical edge member 5 is arranged on the outside of the edge prefabricated wall panels 1 Connect with the prefabricated wall panel 1 at the edge through the horse-tooth structure 13, the exposed part of the horizontal steel bar 11 is nested with the cast-in-place connecting column 2 and the longitudinal bars in the cast-in-place vertical edge member 5, and the joints are spot-welded to achieve reliable anchoring , wherein, the horizontal reinforcement 11 in the uppermost prefabricated wall panel 1 is also nested with the longitudinal reinforcement of the constrained concealed beam, and is spot welded at the joint;

Finally, the formwork support of the cast-in-place connecting column 2 is carried out, and the polypropylene fiber sludge ceramsite concrete is poured to form a prefabricated wall.

In the third step, when the strength of the prefabricated wall panel 1 reaches more than 75% of the design value, the construction can begin.

Compared with prior art, the beneficial effect of the present invention is:

1. The prefabricated wall uses new ecological concrete materials, which can effectively alleviate the consumption of raw materials, and also solve the problem of recycling some urban waste.

2. Compared with the traditional connection method, the prefabricated wall has the advantages of good integrity and good seismic performance, and can effectively solve the problems of the traditional prefabricated shear wall connection method, such as high prefabrication precision requirements for components, and installation hole consumption. Long time, high installation error control requirements and other issues.

3. The prefabricated wall joints are fast in construction, reliable in connection, and good in structural integrity. Its "well"-shaped reinforcement has good mechanical performance, energy dissipation and shock absorption, excellent ductility design, and reasonable use of materials.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the prefabricated wall structure of the present invention.

Fig. 3 is a schematic diagram of the size and reinforcement structure of the prefabricated wallboard of the present invention.

Fig. 4 is a dimensional drawing of the wall body of the present invention.

Detailed ways

The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

As shown in Fig. 1 and Fig. 2, a kind of assembled polypropylene fiber sludge ceramsite concrete wall based on the connection of horse teeth of the present invention comprises:

The prefabricated wallboard 1 is provided with a horse-toothed structure 13 on its left and right sides, and has a built-in horizontal steel bar 11 and a vertical steel bar 12 . As shown in Figure 2 and Figure 3, the internal reinforcement form of the prefabricated wall panel 1 is optimized as a "well" shape, and the horizontal steel bars 11 and the vertical steel bars 12 are in the form of double bars in the left and right directions and the front and rear directions of the prefabricated wall panel 1. That is, four horizontal steel bars 11 and four vertical steel bars 12 form a unit, and a plurality of units are connected in sequence in a prefabricated wall panel 1 to form a "well" shaped reinforcement form in the prefabricated wall panel.

As shown in Figure 3, a better size parameter of the prefabricated wall panel 1 is: the thickness of the wall panel is 100mm, the height of the wall panel is 1320mm, the width of the wall panel is 950mm, and a concrete protective layer with a thickness of 10mm is set on it. The anchorage length to the steel bars 12 is 190 mm, the distance between the outermost one of the vertical steel bars 12 and the concrete skin is 60 mm, and the anchorage length to the horizontal steel bars 11 is 215 mm.

The cast-in-place connecting column 2 is occluded with the prefabricated wall panel 1 through the horse teeth structure 13, and the longitudinal reinforcement is built in, and the longitudinal reinforcement and the horizontal reinforcement 11 are nested, and reliable anchoring is achieved by spot welding at the joints to form a horizontal prefabricated wall The connection structure of board 1;

The cast-in-place vertical edge member 5 is occluded and connected with the outer surface of the edge prefabricated wall panel 1 through the horse-tooth structure 13, and the longitudinal reinforcement is built in, and the longitudinal reinforcement is nested with the horizontal reinforcement 11, and a little Reliable anchoring is achieved by welding to form a connection structure of prefabricated wall panels 1 in the horizontal direction;

The pre-embedded welding plate 3 is buried on the upper and lower sides of the prefabricated wall panel 1, and the prefabricated wall panel 1 is welded by the pre-embedded welding plate 3 to form a connection structure in the vertical direction;

Set the cast-in-place constrained hidden beam 6 and the cast-in-place floor slab or laminated floor 4 above the prefabricated wall panel 1, the cast-in-place constrained concealed beam 6 and the cast-in-place floor slab or laminated floor 4 are provided with transverse ribs, and the prefabricated wall panel 1 The vertical steel bars are nested and spot welded at the joints to achieve reliable anchoring.

Among them, the prefabricated wall panel 1 is made of polypropylene fiber sludge ceramsite concrete. Polypropylene fiber sludge ceramsite concrete is a new type of ecological material, which has light weight, thermal insulation, good fire resistance, and good corrosion resistance. , good seismic performance and so on. The proportion of polypropylene fiber sludge ceramsite concrete is:

Each cubic meter of concrete contains: 70-117kg of polypropylene fiber, 516kg of sludge ceramsite, 400kg of cement, 180kg of water and 819kg of sand. The sludge ceramsite used is taken from urban sewer sludge, which is used to replace clay, and is made by dredging, natural drying, raw material into balls, preheating, roasting, and cooling.

The present invention also provides the construction method of the assembled polypropylene fiber sludge ceramsite concrete wall based on the horse teeth, including:

Step 1: preparing polypropylene fiber sludge ceramsite concrete, including the following steps:

Step 1, preparing sludge ceramsite, specifically as follows:

Step 1.1, obtaining raw sludge and dehydrating and drying it, the raw sludge can come from municipal sewer sludge;

Step 1.2, grinding and homogenizing the dehydrated and dried sludge;

Step 1.3: Squeeze the homogenized sludge into balls and send it to the ceramsite rotary kiln for firing. The process conditions are firstly preheated at 400°C for 20 minutes, then heated to 1000°C for 20 minutes, and finally cooled naturally in the air;

In step 1.4, the fired ceramsite is cooled and classified and screened, and ceramsite with a particle size of 5-20 mm is used as a raw material.

Step 2: Mix and stir the polypropylene fiber and the sludge ceramsite according to the aforementioned ratio so that the polypropylene fiber is dispersed in the sludge ceramsite. In order to make the polypropylene fiber evenly distributed in the concrete, the polypropylene fiber is first kneaded and separated , and then put the polypropylene fiber and sludge ceramsite into the mixer and mix for 30 seconds;

Step 3, mix sand and cement with the mixture obtained in step 2, first dry stir for 30 seconds, then add water to the rotating mixer, and stir for about 3 minutes;

Step 4, putting the stirred polypropylene fiber sludge ceramsite into the mold for molding;

Step 5, put the formed polypropylene fiber sludge ceramsite concrete into a standard curing room for curing, and the curing method and time are the same as those of ordinary concrete.

Step 2: Prepare prefabricated wall panels 1

First, assemble the steel formwork of the horse-toothed structure 13, bind the steel mesh, bury the embedded welding plate 3, and then pour polypropylene fiber sludge ceramsite concrete to initially form the prefabricated wall panel 1; finally, standard maintenance for 1 to 2 days, demolition Steel formwork to form the concrete wall panels with curbs;

Step 3: Integral pouring of the prefabricated wall

Wet the base of the wall first, lay the mortar at the bottom of the prefabricated wallboard 1; then adjust the positioning and seating of the prefabricated wallboard 1, in the vertical direction, the pre-embedded welding plate 3 is correspondingly welded, and the part without the welding plate is filled with dense mortar; in the horizontal direction Directionally, the cast-in-place connecting column 2 is arranged between the adjacent prefabricated wall panels 1 and is connected to the prefabricated wall panels 1 on both sides through the horse-tooth structure 13, and the cast-in-place vertical edge member 5 is arranged on the outside of the edge prefabricated wall panels 1 Connect with the prefabricated wall panel 1 at the edge through the horse-tooth structure 13, the exposed part of the horizontal steel bar 11 is nested with the cast-in-place connecting column 2 and the longitudinal bars in the cast-in-place vertical edge member 5, and the joints are spot-welded to achieve reliable anchoring , wherein, the horizontal reinforcement 11 in the uppermost prefabricated wall panel 1 is also nested with the longitudinal reinforcement of the constrained concealed beam, and is spot welded at the joint;

As shown in Figure 4, the obtained wall size parameters are: the distance from the top of the bottom beam to the bottom of the concealed beam is 1350mm; the height of the concealed beam is 200mm; the width of the cast-in-place connecting column 2 is 200mm; the width of the wall is 1400mm; 2 The distance between the inner concrete skin and the outermost reinforcement of the wall panel is 85mm. This size complies with the minimum size requirements of the "Technical Regulations for Prefabricated Composite Wall Structures" (DBJ61/T94-2015), and meets the structural measures (deleted). This structure not only meets the requirements of conventional civil buildings, but also has high bearing capacity and earthquake resistance. Good; large-scale production of wall panels can be realized, which is conducive to the realization of building industrialization.

Claims (5)

1., based on the assembling polypropylene fibre sludge ceramsite concrete wall that horse tooth trough connects, it is characterized in that, comprising:

Prefabricated panel (1), its left and right side is provided with horse tooth trough structure (13), built-in horizontal reinforcement (11) and vertical reinforcement (12);

Cast-in-place joint pin (2), be connected by described horse tooth trough structure (13) with prefabricated panel (1), built-in vertical muscle, described vertical muscle is nested with horizontal reinforcement (11), and in junction one by one spot welding realize reliable anchoring, formed horizontal direction prefabricated panel (1) syndeton;

Cast-in-place vertical edges component (5), be connected by described horse tooth trough structure (13) with the lateral surface of edge prefabricated panel (1), built-in vertical muscle, described vertical muscle is nested with horizontal reinforcement (11), and in junction one by one spot welding realize reliable anchoring, formed horizontal direction prefabricated panel (1) syndeton;

Pre-buried welding plate (3), is embedded in the bottom surface of prefabricated panel (1), and in the vertical direction forms syndeton with the welding plate being arranged at dark top surface of the beam by welding;

Wherein, described prefabricated panel (1) is made up of polypropylene fibre sludge ceramsite concrete, and the concrete proportioning of described polypropylene fibre sludge ceramsite is:

Contain in every cubic meter of concrete: polypropylene fibre 0.6kg ~ 1.2kg, sludge ceramsite 516kg, cement 400kg, water 180kg and sand 819kg.

2. according to claim 1 based on the assembling polypropylene fibre sludge ceramsite concrete wall that horse tooth trough connects; it is characterized in that; described level and vertical reinforcement are two muscle form on the left and right directions and fore-and-aft direction of prefabricated panel (1); namely; four horizontal reinforcements and four vertical reinforcements form a unit, have multiple unit to connect in order in a prefabricated panel (4).

3. according to claim 1 or 2 based on horse tooth trough connect assembling polypropylene fibre sludge ceramsite concrete wall; it is characterized in that; the wallboard thickness of described prefabricated panel (1) is 100mm; wall-plate level is 1320mm; panel width is 950mm; on it, thickness setting is the concrete cover of 10mm; the anchorage length of described vertical reinforcement (12) is 190mm; outermost one of vertical reinforcement (12) is 60mm to concrete outward flange spacing, and the anchorage length of horizontal reinforcement (11) is 215mm.

4., according to claim 1 based on the construction method of the assembling polypropylene fibre sludge ceramsite concrete wall of horse tooth trough connection, it is characterized in that, comprise the steps:

Step one: prepare polypropylene fibre sludge ceramsite concrete

First polypropylene fibre is made to be dispersed in sludge ceramsite polypropylene fibre and sludge ceramsite mix and blend; Again by the mixture that obtains and sand and cement mixing, first dry stirring adds water stirring again; Mixing time is consistent with ordinary concrete; Finally obtain polypropylene fibre sludge ceramsite concrete;

Step 2: prepare prefabricated panel (1)

First assemble the steel form of horse tooth trough structure (13), assembling reinforcement mesh sheet, buries pre-buried welding plate (3) underground, then uses the concreting of polypropylene fibre sludge ceramsite, begins to take shape prefabricated panel (1); Last standard curing 1 ~ 2d, removes steel form, forms the concrete panel of band horse tooth trough;

Step 3: assembling body of wall monobloc cast

First wetting wall base ground, lays prefabricated panel (1) bottom mortar, then adjust prefabricated panel (1) location and in place, in the vertical direction, pre-buried welding plate (3) correspondence welding, clog closely knit mortar without welding plate position, in the horizontal direction, cast-in-place joint pin (2) is arranged between adjacent prefabricated panel (1) and is connected with both sides prefabricated panel (1) by horse tooth trough structure (13), cast-in-place vertical edges component (5) is arranged at prefabricated panel (1) outside at edge by the prefabricated panel (1 be connected) of horse tooth trough structure (13) with edge, the exposed parts of horizontal reinforcement (11) is nested with muscle vertical in cast-in-place joint pin (2) and cast-in-place vertical edges component (5), junction one by one spot welding realizes reliable anchoring, wherein, it is nested that horizontal reinforcement (11) in the prefabricated panel (1) of the top also indulges muscle with the dark beam of constraint, and the spot welding one by one in junction,

Finally carry out the template support of cast-in-place joint pin (2), and build polypropylene fibre sludge ceramsite concrete, form assembling body of wall.

5. according to claim 4 based on the construction method of the assembling polypropylene fibre sludge ceramsite concrete wall of horse tooth trough connection; it is characterized in that; in described step 3, can construct when the intensity of prefabricated panel (4) reaches more than 75% of design load.