1. The utility model provides a self-supporting two-sided coincide shear wall which characterized in that includes:

each coincide shear force wall body, every coincide shear force wall body includes: the shear wall comprises two prefabricated wall bodies which are arranged in parallel at intervals relatively, wherein vertical steel bars penetrate through each prefabricated wall body, an extending part of each vertical steel bar extends out of each prefabricated wall body, and the extending part is in lap joint with embedded vertical steel bars of a ground beam or a lower-layer shear wall.

2. The self-supporting double-sided superposed shear wall of claim 1, further comprising:

the reinforcing steel bar net piece is arranged in each prefabricated wall body;

and the steel bar trusses are arranged between the two prefabricated walls and are respectively connected with the steel bar meshes in the two prefabricated walls.

3. The self-supporting double-sided overlapping shear wall of claim 1, wherein the length of the extension is 10 times the diameter of the rebar of the extension.

4. The self-supporting double-sided superposed shear wall of claim 1, wherein the length of the extension portion is 1.2 times the preset seismic anchoring length.

5. The self-supporting double-sided superposed shear wall of claim 1, wherein the extending portions are welded with the ground beam or embedded vertical steel bars of the lower shear wall at intervals in a cross manner.

6. The self-supporting double-sided superposed shear wall of claim 1, wherein a post-cast section formwork is arranged at the lap joint of the extension part and embedded vertical steel bars of a ground beam or a lower-layer shear wall, a grouting hole is formed in one side of the formwork, an overflow hole is formed in the other side of the formwork, and the level of the overflow hole is higher than that of the grouting hole.

7. The self-supporting double-sided composite shear wall of claim 1, wherein vertical reinforcement cages are further disposed between each composite shear wall.

8. The self-supporting double-sided composite shear wall of claim 1, wherein the connecting surface of the ground beam or the lower shear wall and each prefabricated wall body is provided with a key groove.

9. A method of constructing a self-supporting double-sided laminated shear wall, wherein the self-supporting double-sided laminated shear wall of any one of claims 1 to 8 is used, the method comprising:

embedding vertical steel bars in the ground beam or the lower-layer shear wall, and reserving the length of the embedded vertical steel bars in the ground beam or the lower-layer shear wall according to the connection form to be adopted;

hoisting each superposed shear wall body to an appointed position, and utilizing the verticality adjusting equipment and the rigid gaskets to adjust the verticality of each superposed shear wall body at the appointed position;

overlapping vertical steel bars of each overlapped shear wall body with pre-embedded vertical steel bars on a ground beam or a lower shear wall by using UHPC steel bars, arranging a template of a post-pouring section at the overlapping position of an extension part and the pre-embedded vertical steel bars of the ground beam or the lower shear wall, and pouring an ultra-high performance concrete material through a grouting hole on the inner side of the template after the template is sealed until grouting materials overflow from an overflow hole on the other side, which is higher than the bottom of the double-sided overlapped shear wall;

splicing the superposed shear walls in a close splicing mode, and inserting a vertical reinforcement cage between the superposed shear walls;

and (3) high-cast concrete is poured among the superposed shear walls, first leather cement mortar with the thickness of 100-200 mm and the same strength grade as that of second leather concrete to be poured is poured to prevent the falling concrete coarse aggregate from bouncing, and then the second leather concrete is poured on the first leather cement mortar.

Background

The assembled shear wall structure has more horizontal and vertical abutted seams and nodes, and the connection quality of the abutted seams and the nodes directly influences the overall anti-seismic performance of the shear wall structure. When the engineering that the height of the prefabricated wall body is too high and the weight is too large is met, the quality and the efficiency of hoisting and construction are difficult to ensure by the common assembly type shear wall, and therefore the double-sided superposed shear wall is gradually popularized. At present, the connection mode of the prefabricated double-sided superposed shear wall is mainly that the upper wall body and the lower wall body are connected into a whole by inserting the steel bars into the cavity and pouring concrete into the cavity, so that the precision of the prefabricated part and the construction quality of grouting are high, the quality detection is inconvenient, the connection reliability of the upper wall body and the lower wall body is still not ensured due to the adoption of the indirect lapping mode of the steel bars, and a novel structural system needs to be invented to solve the problems.

Disclosure of Invention

The invention aims to provide a self-supporting double-sided superposed shear wall and a construction method.

To solve the above problems, the present invention provides a self-supporting double-sided laminated shear wall, comprising:

each coincide shear force wall body, every coincide shear force wall body includes: the shear wall comprises two prefabricated wall bodies which are arranged in parallel at intervals relatively, wherein vertical steel bars penetrate through each prefabricated wall body, an extending part of each vertical steel bar extends out of each prefabricated wall body, and the extending part is in lap joint with embedded vertical steel bars of a ground beam or a lower-layer shear wall.

Further, in the above-mentioned two-sided superimposed shear wall of self-supporting, still include:

the reinforcing steel bar net piece is arranged in each prefabricated wall body;

and the steel bar trusses are arranged between the two prefabricated walls and are respectively connected with the steel bar meshes in the two prefabricated walls.

Furthermore, in the self-supporting double-sided superposed shear wall, the length of the extension part is 10 times of the diameter of the steel bar of the extension part.

Further, in the self-supporting double-sided superposed shear wall, the length of the extension part is 1.2 times of the preset anti-seismic anchoring length.

Furthermore, in the self-supporting double-sided superposed shear wall, the extension parts and the embedded vertical steel bars of the ground beam or the lower shear wall are in interval cross welding.

Furthermore, in the self-supporting double-sided superposed shear wall, a template of a post-pouring section is arranged at the lap joint of the extension part and the embedded vertical steel bars of the ground beam or the lower shear wall, a grouting hole is formed in one side of the template, an overflow hole is formed in the other side of the template, and the horizontal height of the overflow hole is higher than that of the grouting hole.

Furthermore, in the self-supporting double-sided superposed shear wall, a vertical reinforcement cage is arranged between each superposed shear wall body.

Furthermore, in the self-supporting double-sided superposed shear wall, the connecting surface of the ground beam or the lower-layer shear wall and each prefabricated wall body is provided with a key groove.

According to another aspect of the present invention, there is provided a method of constructing a self-supporting double-sided superposed shear wall, comprising the steps of:

embedding vertical steel bars in the ground beam or the lower-layer shear wall, and reserving the length of the embedded vertical steel bars in the ground beam or the lower-layer shear wall according to the connection form to be adopted;

hoisting each superposed shear wall body to an appointed position, and utilizing the verticality adjusting equipment and the rigid gaskets to adjust the verticality of each superposed shear wall body at the appointed position;

overlapping vertical steel bars of each overlapped shear wall body with pre-embedded vertical steel bars on a ground beam or a lower shear wall by using UHPC steel bars, arranging a template of a post-pouring section at the overlapping position of an extension part and the pre-embedded vertical steel bars of the ground beam or the lower shear wall, and pouring an ultra-high performance concrete material through a grouting hole on the inner side of the template after the template is sealed until grouting materials overflow from an overflow hole on the other side, which is higher than the bottom of the double-sided overlapped shear wall;

splicing the superposed shear walls in a close splicing mode, and inserting a vertical reinforcement cage between the superposed shear walls;

and (3) high-cast concrete is poured among the superposed shear walls, first leather cement mortar with the thickness of 100-200 mm and the same strength grade as that of second leather concrete to be poured is poured to prevent the falling concrete coarse aggregate from bouncing, and then the second leather concrete is poured on the first leather cement mortar.

Compared with the prior art, the invention reserves vertical steel bars at the joint of the prefabricated double-sided superposed shear wall to form a post-pouring area with a through full section, adopts ultra-high performance concrete material for post-pouring to realize the high-efficiency connection method of the prefabricated assembly type shear wall and the ground beam or the lower wall body, and has the following characteristics:

the connection is reliable: the vertical steel bars of the outer extending wall limbs suspend the wall body in the air, so that steel bar binding or UHPC short lap joint is facilitated, the effective height of the section of the double-sided overlapped shear wall is increased, and the anti-seismic performance of the structure is improved.

Construction is convenient: the prefabricated shear wall structure connected through the horizontal nodes is high in assembly rate and simple in construction, large-scale hoisting equipment is not needed for long-time operation, and only the inclined struts are used for fixing, so that the construction period can be greatly shortened, and the construction efficiency is improved.

The double-sided superposed shear wall is prefabricated in a factory, self-bearing adjustment is carried out on site, and UHPC post-pouring connection or reinforcement binding connection is adopted at joint positions, so that a set of industrialized construction system which is simpler, more convenient, more efficient, more stable and safer in construction is finally formed.

Drawings

FIG. 1 is a structural diagram of a self-supporting stacked double-sided shear wall according to an embodiment of the invention;

fig. 2 is a schematic diagram of splicing of stacked shear walls according to an embodiment of the invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1, the present invention provides a self-supporting double-sided laminated shear wall, comprising:

each coincide shear force wall body, every coincide shear force wall body includes: the shear wall comprises two prefabricated wall bodies 1 which are arranged in parallel at intervals relatively, vertical steel bars 2 penetrate through each prefabricated wall body, the extending parts of the vertical steel bars 2 extend out of each prefabricated wall body, and the extending parts are in lap joint with pre-buried vertical steel bars of a ground beam or a lower-layer shear wall 3.

According to the self-supporting double-sided superposed shear wall, the fully-through vertical steel bars are adopted, the wall limbs of which the bottoms extend out of the prefabricated wall bodies are lapped with the ground beam or the embedded vertical steel bars of the lower-layer shear wall, the upper steel bars and the lower steel bars can be connected by means of short-lapped-bar pouring of UHPC (ultra high Performance concrete) or steel-bar-bound pouring of concrete, the problems that the traditional vertical components are low in connection efficiency and inconvenient to detect are solved, the self-supporting double-sided superposed shear wall has the advantages of simple connection mode, labor saving and reliable lapping, and the prefabricated shear wall structure has better shock resistance and convenience in rapid construction. The invention uses the wall limb steel bar with the bottom extending outwards to carry out self-bearing, the self-bearing double-sided superposed shear wall lifts the wall body off the ground through the extending part of the vertical steel bar extending out of the wall limb, the construction operation space is reserved,

key grooves are formed in the connecting surfaces of the ground beam or the lower-layer shear wall and each prefabricated wall body, and the ultrahigh-performance concrete material is poured after the key grooves are formed, and the aggregate is exposed after the key grooves are roughened.

As shown in fig. 1, in an embodiment of the self-supporting double-sided superposed shear wall of the present invention, the self-supporting double-sided superposed shear wall further includes:

the reinforcing steel bar net piece is arranged in each prefabricated wall body;

and the steel bar trusses 4 are arranged between the two prefabricated walls, and the steel bar trusses 4 are respectively connected with the steel bar meshes in the two prefabricated walls.

In an embodiment of the self-supporting double-sided superposed shear wall of the present invention, the length of the extension portion is 10 times of the diameter of the steel bar of the extension portion.

When the prefabricated wall body and the ground beam or the lower layer shear wall are connected by adopting a UHPC post-cast section, the lap joint length of the vertical reinforcing steel bars can be 10 times of the diameter of the reinforcing steel bars.

In an embodiment of the self-supporting double-sided superposed shear wall, the length of the extension portion is 1.2 times of the preset anti-seismic anchoring length.

When the prefabricated wall body and the ground beam or the lower shear wall are connected by adopting a common concrete post-pouring section, 1.2 times of anti-seismic anchoring length is reserved for binding and overlapping.

In an embodiment of the self-supporting double-sided superposed shear wall, the extension part and the embedded vertical steel bars of the ground beam or the lower shear wall are alternately and crossly welded.

Herein, overhanging reinforcing bar and grade beam or lower floor's shear force wall pre-buried vertical reinforcement carry out interval cross welding, guarantee the overall stability of structure self-supporting.

As shown in fig. 1, in an embodiment of the self-supporting double-sided superposed shear wall, a post-cast section template 5 is arranged at a lap joint of the extension portion and a pre-embedded vertical steel bar of the ground beam or the lower shear wall, a grouting hole is arranged on one side of the template, an overflow hole is arranged on the other side of the template, and the horizontal height of the overflow hole is higher than that of the grouting hole.

The formwork can be installed at the post-pouring section, and the ultra-high performance concrete material is poured through the grouting hole reserved on one side of the bottom of the formwork until the grouting material overflows from the overflow hole on the other side higher than the bottom of the double-faced superposed shear wall. And removing the mold and maintaining after the post-cast section reaches the preset strength.

As shown in fig. 2, in an embodiment of the self-supporting double-sided stacked shear wall of the present invention, a vertical reinforcement cage 7 is further disposed between each stacked shear wall.

The stacked shear walls are assembled in a close-fitting mode, a vertical reinforcement cage is hung in the stacked shear walls, the stacked shear walls are poured in multiple times by a high-throwing method, and cement mortar with the strength equal to that of concrete is used for leveling after the strength of the concrete in the walls meets requirements.

As shown in fig. 1 and 2, according to another aspect of the present invention, there is also provided a method of constructing a self-supporting double-sided laminated shear wall, the method including:

step S1, embedding vertical steel bars in the ground beam or the lower-layer shear wall, and reserving the length of the embedded vertical steel bars in the ground beam or the lower-layer shear wall according to the connection form to be adopted;

step S2, hoisting each superposed shear wall to an appointed position, and utilizing a verticality adjusting device and a rigid gasket to adjust the verticality of each superposed shear wall at the appointed position;

step S3, overlapping the vertical steel bars of each overlapped shear wall with the pre-embedded vertical steel bars on the ground beam or the lower shear wall by using UHPC steel bars 6, arranging a template of a post-pouring section at the overlapping position of the extension part and the pre-embedded vertical steel bars of the ground beam or the lower shear wall, and pouring an ultra-high performance concrete material through a grouting hole on the inner side of the template after the template is sealed until grouting material overflows from an overflow hole on the other side, which is higher than the bottom of the double-sided overlapped shear wall;

the vertical steel bars of each overlapped shear wall body and the pre-embedded vertical steel bars on the ground beam or the lower shear wall can also be bound and overlapped by steel bars, and the inner side of the overlapped shear wall body is subjected to common concrete super-grouting after the mold is sealed;

step S4, splicing the superposed shear walls in a close splicing mode, and inserting a vertical reinforcement cage between the superposed shear walls;

and step S5, casting high-cast concrete among the superposed shear walls, casting first skin cement mortar with the thickness of 100-200 mm and the same strength grade as the concrete to be cast to prevent the free falling concrete coarse aggregate from bouncing, and then casting second skin concrete on the first skin cement mortar. The discharge port of the pump pipe needs to extend into two prefabricated walls which are arranged in parallel at intervals relatively, and the kinetic energy generated by the falling of the concrete is utilized to achieve the self-compaction of the concrete. After the second concrete is poured, spraying concrete curing liquid, sealing the upper opening with plastic cloth, and after the strength of the concrete in the wall meets the requirement, leveling with cement mortar with the strength equal to that of the concrete.

In summary, the invention reserves the vertical steel bar at the joint of the prefabricated double-sided superposed shear wall to form the post-pouring area with a through full section, and adopts the ultra-high performance concrete material for post-pouring to realize the high-efficiency connection method of the prefabricated assembly type shear wall and the ground beam or the lower wall body, and the method has the following characteristics:

the connection is reliable: the vertical steel bars of the outer extending wall limbs suspend the wall body in the air, so that steel bar binding or UHPC short lap joint is facilitated, the effective height of the section of the double-sided overlapped shear wall is increased, and the anti-seismic performance of the structure is improved.

Construction is convenient: the prefabricated shear wall structure connected through the horizontal nodes is high in assembly rate and simple in construction, large-scale hoisting equipment is not needed for long-time operation, and only the inclined struts are used for fixing, so that the construction period can be greatly shortened, and the construction efficiency is improved.

The double-sided superposed shear wall is prefabricated in a factory, self-bearing adjustment is carried out on site, and UHPC post-pouring connection or reinforcement binding connection is adopted at joint positions, so that a set of industrialized construction system which is simpler, more convenient, more efficient, more stable and safer in construction is finally formed.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.