CN114439219A - A retractable floor support truss - Google Patents

Abstract

The invention discloses a retractable floor support truss, which belongs to the technical field of construction methods and measures for construction projects. The supporting truss is composed of a rectangular tube in the middle section of the upper chord, an inverted tripod, a lower chord tensioner and a truss support. The inverted tripod is welded by the rectangular tube, and the structure is more stable. The size of the inner hole of the rectangular tube of the upper chord of the inverted tripod is the same as that of the square tube in the middle section of the upper chord. Connecting holes are drilled for each section of the rectangular tube in the middle section of the upper chord, and the rectangular tube in the middle section of the upper chord passes through Insert one end of the upper chord rectangular tube with the connecting hole of the inverted tripod and fix it with a bolt. The intersection point of the lower web rod of the inverted tripod is connected with the hook of the lower string tensioner to realize the truss arching. The other end of the inverted tripod is welded with a groove connector, the truss support is connected to the steel beam with the web opening through bolts, the truss support is welded with nuts to connect the bolts, and the upper part of the bolt is embedded in the groove to support the truss. Bolts through nuts can adjust the height of the support truss. The adjustable distance between the tops of the bolts on both sides in the groove of the connector is greater than the drilling distance of the rectangular tube in the middle section of the upper chord and the design of the tensioner of the lower chord, so that the support truss can achieve any size expansion and contraction within a certain range.

Description

A retractable floor support truss

technical field

The invention relates to the technical field of building structures, in particular to a floor support truss.

Background technique

With the increasing implementation of my country's housing system reform system, the affordable housing and commercial housing industries have developed extremely rapidly, and the construction of civil residential buildings has become more and more common. In today's residential building construction, most of the floors are based on cast-in-place concrete structures, and the entire engineering structure is also dominated by high-rise frame structures and concrete structures. In engineering projects, because the cast-in-place concrete structure is often affected by various reasons in the later stage of construction, certain quality problems will occur. Therefore, it is necessary to strictly analyze the engineering construction during the construction, and propose countermeasures for the quality problems of concrete construction. and preventive measures to ensure the normal development of the project and provide a solid theoretical basis for the construction of high-quality, safe and reliable civil residential buildings.

The cast-in-place reinforced concrete floor refers to the floor that is made by supporting the formwork, binding the steel bars, pouring the concrete, curing and dismantling the formwork according to the design position on site. During the construction of floor slab engineering in traditional buildings, scaffolding is generally erected in advance, formwork and steel mesh are laid on the scaffolding, and then concrete is poured. When the concrete reaches a certain strength, the scaffolding and formwork are removed. This building construction method is widely used, but it needs to set up full scaffolding, and cannot construct multiple layers at the same time. The construction progress is slow, it takes up a lot of turnover materials, and the construction cost is high, which is not suitable for the development requirements of building assembly.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a retractable floor support truss, which is suitable for a certain range of spacing, has good versatility, occupies less turnover materials, and has low construction cost, which is suitable for building assembly. development requirements.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A retractable floor slab support truss is characterized in that it includes a rectangular tube in the middle section of the upper chord, an inverted triangle of the welding rectangular tube, a wire tensioner for the lower chord and a truss support, and the rectangular tube in the middle section of the upper chord passes between the inverted triangles. The upper chord of the inverted tripod is inserted into the upper chord of the inverted tripod and fixed by the bolt; the lower chord of the supporting truss is provided with a thread tensioner, and the hook of the thread tensioner is connected with the intersection point of the web bar of the inverted tripod. The groove connector is provided at the end of the support truss, and the steel beam web is connected to the truss support by bolts.

The truss support is welded with the nut to connect the bolt, and the upper part of the bolt is embedded in the groove connecting piece to lift the supporting truss.

The inverted tripod is formed by welding rectangular tubes.

The upper chord middle section rectangular tube is inserted into the upper chord rectangular tube of the inverted tripod and is fixed by the latch.

A wire tensioner is arranged on the lower chord of the supporting truss, and the hook of the wire tensioner is connected with the intersection point of the web bar of the inverted tripod.

The upper chord middle section rectangular tube is drilled with connecting holes at each distance, and the adjustable distance of the bolt tops on both sides in the groove connecting piece is greater than the drilling distance of the upper chord middle section rectangular tube.

The present invention has the following beneficial effects due to the adoption of the above-mentioned technical solutions:

1. In the present invention, the upper chord middle section rectangular tube is designed with a connecting hole at intervals, so that the upper chord middle section rectangular tube and the inverted tripod upper chord rectangular tube can be connected by bolts at intervals of this distance. The tops of the bolts on both sides can be moved in the groove connecting piece, and the moving range is greater than the distance between the connecting holes of the rectangular tube in the middle section of the upper chord, so that the supporting truss can be adjusted at any length within a certain range. The support truss is suitable for various slab span situations, which has a higher reuse rate and reduces the single-use cost.

2. The welding nut connecting bolt of the truss support of the present invention, the upper part of the bolt is embedded in the groove connecting piece to jack up the supporting truss. The height can be adjusted within a certain range, which is convenient for floor leveling, which makes the construction quality higher and facilitates the dismantling of the truss.

3. The inverted tripod of the present invention is formed by welding a rectangular tube, and the middle section of the upper chord is inserted into the upper chord rectangular tube of the inverted tripod, so that the construction speed is faster and the structural strength is higher.

4. In the present invention, the lower chord of the supporting truss is provided with a thread tightening device, and the hook of the thread tightening device is connected with the intersection point of the web bar of the inverted tripod. The arching of the support truss is realized by the wire tensioner, so that the support truss is not bent downward after the concrete is poured, and the adjustment is more convenient.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

1 is a schematic structural diagram of a retractable floor support truss according to the present invention;

In the figure, 1 - inverted tripod; 2 - steel beam; 3 - upper chord middle section rectangular tube; 31 - upper chord middle section rectangular tube connecting hole; 4 - wire tensioner; 5 - support truss support; 6 - latch.

Figure 2 is a schematic diagram of the structure of an inverted tripod welded by a rectangular tube;

In the figure, 11 - upper chord tube of inverted tripod; 12 - web bar of inverted tripod; 13 - groove connector.

FIG. 3 is a schematic diagram of the connection between the supporting truss and the supporting truss bearing of the present invention;

In the figure, 11 - upper chord moment tube of inverted tripod; 12 - web of inverted tripod; 13 - groove connector; 21 - web of steel beam; 51 - support truss bearing bolt; 52 - supporting truss bearing nut.

Detailed ways

As shown in FIG. 1, it is a telescopic floor support truss of the present invention, including a rectangular tube welding inverted tripod 1, a steel beam 2, a rectangular tube 3 in the middle section of the upper chord, a wire tensioner 4, a supporting truss support 5 and a bolt 6 .

As shown in FIG. 2 , the inverted tripod of the present invention is welded by a rectangular tube, including an inverted tripod upper chord rectangular tube 11 , an inverted tripod web rod 12 and a groove connector 13 .

Rectangular tube 3 in the middle section of the upper chord between the inverted tripods 1 is inserted into the upper chord rectangular tube 11 of the inverted tripod and fixed by the bolts 6; connect. The groove connector 13 is provided at the end of the supporting truss, and the steel beam web 21 is connected to the supporting truss support 5 by bolts.

As shown in FIG. 3 , a schematic diagram of the connection between the support truss of the present invention and the support truss support 5 , the support truss support 5 includes nuts 52 and bolts 51 .

The support truss support 5 is welded with nuts 52 to connect the bolts 51 , and the upper part of the bolts 51 is embedded in the groove connecting piece 13 to jack up the support truss.

The upper chord middle section rectangular tube 3 penetrates into the upper chord rectangular tube 11 of the inverted tripod and is fixed by the bolt 6 .

A wire tensioner 4 is arranged on the lower chord of the supporting truss, and the hook of the wire tensioner 4 is connected to the intersection point of the web bar 12 of the inverted tripod.

The connecting holes 31 are drilled in each section of the upper chord middle section rectangular tube 3 , and the adjustable distance between the tops of the bolts 51 on both sides in the groove connecting piece 13 is greater than the distance between the upper chord middle section rectangular tube drilling holes 31 .

Claims (6)

1. A scalable floor support truss which characterized in that: the device comprises an upper chord middle section rectangular pipe, a rectangular pipe welded to form a reversed triangular frame, a lower chord wire tightener and a truss support, wherein the upper chord middle section rectangular pipe between the reversed triangular frames penetrates into the upper chord rectangular pipe of the reversed triangular frame and is fixed through a bolt; the lower chord of the support truss is provided with a tightener, and a lifting hook of the tightener is connected with the intersection point of the inverted tripod web members; the supporting truss end is provided with the groove connecting piece, and the steel beam web is connected with the truss support through bolts.

2. A retractable floor support truss according to claim 1 wherein: the truss support is welded with the nut to be connected with the bolt, and the upper part of the bolt is embedded into the groove connecting piece to jack up the supporting truss.

3. A retractable floor support truss according to claim 1 wherein: the inverted tripod is formed by welding a rectangular pipe.

4. A retractable floor support truss according to claim 1 wherein: the rectangular tube at the middle section of the upper chord penetrates into the rectangular tube at the upper chord of the inverted triangular frame and is fixed through the bolt.

5. A retractable floor support truss according to claim 1 wherein: the supporting truss is characterized in that a tightener is arranged on the lower chord of the supporting truss, and a lifting hook of the tightener is connected with an intersection point of the inverted tripod web members.

6. A retractable floor support truss according to claim 1 and claim 2, wherein: and a connecting hole is drilled at each section of the rectangular pipe at the middle section of the upper chord, and the adjustable distance between the tops of the bolts at two sides in the groove connecting piece is greater than the drilling distance of the rectangular pipe at the middle section of the upper chord.

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