CN105863286A - Wide-post double-beam structure and building body structure underpinning modification method - Google Patents

Abstract

The invention discloses an underpinning transformation method for a wide-column double-beam structure and a masonry structure. The wide-column double-beam structure includes a wide column (1) and an underpinning beam (2). ), the other end is poured into multiple shearers (3) in the floor slab (4); the masonry structure underpinning transformation method includes: (10) on the basis of the original structural column, the surroundings are widened to form a wide column (1 ); (20) an underpinning beam (2) is respectively arranged on both sides of the original body of wall; (30) a pouring hole is opened on the floor above the underpinning beam (2), and one end of the shearer is poured on the underpinning beam (2) ), the other end is poured in the floor (4); (40) the connecting rib (4) is set in the difficult-to-remove wall, one end is poured in the underpinning beam (2), and the other end is poured in the undemolished wall ( 5) inside. The wide-column double-beam structure and the underpinning transformation method of the present invention do not need to dismantle the original wall body during the transformation of the masonry structure.

Description

Underpinning Reconstruction Method of Wide Column Double Beam Structure and Masonry Structure

technical field

The invention belongs to the technical field of transformation of masonry structures, in particular to a method for underpinning and transformation of a wide-column double-beam structure and a masonry structure.

Background technique

With the continuous development of urban and rural construction, most masonry structures are limited by small bays and small depths, which cannot meet people's growing requirements for buildings. In recent years, the reconstruction of old cities has been a hot issue that governments in various parts of our country have generally paid attention to. In view of the protection of old buildings, the planning department often requires "repairing the old as the old", that is, the original architectural style cannot be changed, but the internal use function must be changed according to the needs of economic development (such as changing a hotel into a shopping mall), which is Structural engineers are required to carry out reasonable underpinning and reinforcement reformation on the original structure.

For the underpinning technology, relevant design regulations and structural requirements are put forward in some technical regulations such as the "Technical Regulations for Underpinning of Buildings (Structures)" (CECS 295:2011). However, in the process of renovation, it is often necessary to demolish the wall first, and then pour the concrete underpinning system, thus causing certain damage to the original structure. Or the original masonry wall is not easy to remove.

In a word, the problems existing in the prior art are: the original wall body needs to be removed first when the masonry structure is reconstructed, resulting in damage to the original structure, or the original wall body is difficult to remove, and the reconstruction work cannot be carried out.

Contents of the invention

The purpose of the present invention is to provide a wide-column double-beam structure, which can make the masonry structure remodel without demolishing the original wall first, neither damage the original structure nor be hindered by the difficult-to-remove wall.

Another object of the present invention is to provide a method for underpinning a masonry structure, which is not affected by the original wall and does not damage the original structure.

The technical solution that realizes the object of the present invention is:

A wide-column double-beam structure, including wide columns formed by widening the original structural columns and underpinning beams respectively located on both sides of the wall, and the two ends of each underpinning beam are respectively lapped on the wide columns It also includes a plurality of shear transmission devices, one end of which is poured in the underpinning beam, and the other end is poured in the floor slab.

The technical solution that realizes another object of the present invention is:

A method for underpinning a masonry structure, comprising the steps of:

(10) Pour reinforced concrete around the original structural column to form a wider column (1) with a larger width than the ordinary column;

(20) Set an underpinning beam on both sides of the original wall, so that the two ends of the underpinning beam are respectively lapped on the wide column;

(30) Open a concrete pouring hole on the floor above the underpinning beam, pour one end of the shearer into the underpinning beam, and pour the other end into the floor;

(40) Remove the original wall. If there is a part that is difficult to remove, set the connecting rib so that one end is poured in the underpinning beam, and the other end is poured in the unremoved wall.

Compared with the prior art, the present invention has the remarkable advantages of:

The masonry structure can be reconstructed without demolishing the original wall first, and the original structure will not be damaged, nor will it be hindered by the difficult-to-remove wall. If the original safety level is maintained, the base plate and floor plate generally do not need to be replaced or reinforced. Compared with demolishing and rebuilding the same structure, the project cost can be saved by 40-50%. Therefore, the popularization and application of this structural system in the reconstruction of old cities can produce good economic benefits.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the plane view of the wide column double beam structure of the present invention.

2-4 are partial sectional views in FIG. 1 .

Figure 5 is a plan view of the masonry structure building before renovation.

Fig. 6 is a building plan view of a masonry structure transformed by the method of the present invention.

In the figure, 1 is a wide column, 2 is an underpinning beam, 3 is a shear passer, 4 is a floor slab, 5 is an undemolished wall, and 6 is a connecting bar.

detailed description

As shown in Figures 1-4, the wide-column double-beam structure of the present invention includes a wide column 1 formed by widening the original structural column and underpinning beams 2 respectively located on both sides of the wall. The two ends of the underpinning beam 2 are overlapped on the wide column 1 respectively, and a plurality of shear transmission devices 3 are also included.

The shearing device is placed in the concrete pouring hole and plays the role of connecting the slab and the beam. It can resist the slippage between the original slab and the newly added beam;

The two beams are respectively poured on both sides of the masonry wall, and the two ends are respectively lapped on the wide column. The beam and column concrete is poured first, and then the wall is removed, which will cause less damage to the original structure;

The wide column is a reinforced concrete column with a larger width than the ordinary column, which is added a certain width around the original structural column during the transformation of the masonry structure to accommodate the newly added beam.

It also includes connecting ribs 4, one end of which is poured into the underpinning beam 2, and the other end is poured into the undemolished wall body 5.

During the transformation process, the beams and columns are poured first, and then the masonry walls between the double beams are removed, and the remaining parts that are not easy to be removed are left inside the double beams, and the connecting bars are reasonably arranged to ensure that the double beams and the unremoved walls work together to strengthen the structure sex.

The underpinning beams 2 on both sides of the wall are connected by connecting ribs 6 . This increases the overall performance of the entire wide column double beam structure.

The masonry structure underpinning reconstruction method of the present invention comprises the following steps:

(10) Pour reinforced concrete around the original structural column to form a wider column (1) with a larger width than the ordinary column;

(20) An underpinning beam 2 is respectively arranged on both sides of the original wall, so that the two ends of the underpinning beam 2 are lapped on the wide column 1 respectively;

(30) Concrete pouring holes are provided on the floor above the underpinning beam 2, and one end of the shearer is poured in the underpinning beam 2, and the other end is poured in the floor 4;

(40) Remove the original body of wall, if there is a part that is difficult to remove, then set the connecting rib 4 so that one end is poured in the underpinning beam 2, and the other end is poured in the undemolished body of wall 5.

Figure 5 is a plan view of the masonry structure building before renovation. Fig. 6 is a building plan view of a masonry structure transformed by the method of the present invention.

Comparing Figure 5 and Figure 6, it can be seen that:

The method of the present invention can be widely used in the transformation of houses, hotels, hospitals, etc. with masonry or concrete structures, and is especially suitable for the transformation of old buildings from small spaces to large spaces, and the original structure does not change its mechanical performance when supporting .

If there is a part that is difficult to remove, set the connecting rib 4 so that one end is poured in the underpinning beam 2, and the other end is poured in the unremoved wall 5, so that the structural system formed after the underpinning does not change the structure of the unreplaced member. Stress characteristics, in the whole transformation process, the transformation of the structural system is natural and smooth, and the stress is reasonable.

In the case of maintaining the original safety level, the base plate and floor slab generally do not need to be replaced or reinforced, which can save 40-50% of the project cost compared with demolishing and rebuilding the same structure. Therefore, the popularization and application of this structural system in the reconstruction of old cities can produce good economic benefits.

Claims (4)

1. one kind wide post twin-spar construction, it is characterised in that: the wide post (1) that includes being widened through surrounding by original constructional column, Laying respectively at the transform beams (2) of body of wall both sides, described every transform beams (2) two ends are overlapped on wide post (1) respectively, Also including that multiple biography cuts device (3), described biography is cut device (3) one end and is cast in transform beams (2), and the other end is cast in building In plate (4).

Wide post twin-spar construction the most according to claim 1, it is characterised in that: also include dowel (4), described company Connecing muscle (4) one end to be cast in transform beams (2), the other end is not removed in body of wall (5) with being cast in.

Wide post twin-spar construction the most according to claim 1 and 2, it is characterised in that be positioned at the torr of body of wall both sides described in: Change and be connected with dowel (6) between beam (2).

4. a masonry structure Underpinning method, it is characterised in that comprise the steps:

(10) by original constructional column pouring reinforcement concrete all around, the wide post bigger relative to common post width is formed (1)；

(20) one transform beams (2) is respectively set in original body of wall both sides, makes transform beams (2) two ends be overlapped on wide post respectively (1) on；

(30) on the floor of transform beams (2) top, offer concreting hole, and biography is cut device one end be cast in torr Changing in beam (2), the other end is cast in floor (4)；

(40) remove original body of wall, if any being difficult to dismounting part, then dowel (4) is set so that it is one end is cast in torr Changing in beam (2), the other end is not removed in body of wall (5) with being cast in.