阅读说明：本技术 一种半自承式高空大悬挑型钢混凝土结构型钢支撑平台及施工方法 (Semi-self-supporting type high-altitude large-cantilever section steel concrete structure section steel supporting platform and construction method ) 是由 龚永庆 龚旭峰 孙奎柱 沈映 马利斌 于 2019-10-14 设计创作，主要内容包括：本发明公开了一种半自承式高空大悬挑型钢混凝土结构型钢支撑平台及施工方法,涉及建筑施工技术领域,针对单核心筒支撑、高空两端大悬挑结构,设计了一种安全、稳固、经济的高空型钢支撑钢平台。所述平台,由原核心筒端柱内含竖向钢骨、型钢斜撑、主次钢梁及檩条组成,所述钢平台组成构件由汽车吊或塔吊吊装就位并焊接固定,形成稳定的三维空间受力体系,以作为上部钢管支撑架的支撑。其特征在于：充分利用了永久结构的钢骨作为竖向支撑,且搭设和拆卸过程中不额外占用吊装机械,从而不影响交叉作业,加快施工进度。(The invention discloses a semi-self-supporting type high-altitude large-cantilever section steel concrete structure section steel supporting platform and a construction method, relates to the technical field of building construction, and designs a safe, stable and economical high-altitude section steel supporting steel platform aiming at a single-core-tube supporting and high-altitude two-end large-cantilever structure. The platform is composed of a prokaryotic core cylinder end column, vertical steel ribs, profile steel inclined struts, primary and secondary steel beams and purlins, and steel platform components are hoisted in place by an automobile crane or a tower crane and are welded and fixed to form a stable three-dimensional space stress system to serve as a support of an upper steel pipe support frame. The method is characterized in that: the reinforcing bar of make full use of permanent structure does not additionally occupy hoist and mount machinery as vertical braces, and sets up and dismantles the in-process to do not influence cross operation for the construction progress.)

1. The utility model provides a half self-supporting high altitude shaped steel concrete structure shaped steel supporting platform and construction method that encorbelments greatly which characterized in that: the structural steel supporting platform component comprises a prokaryotic core cylinder end column, wherein vertical steel ribs, structural steel inclined struts, primary and secondary steel beams and purlins are contained in the prokaryotic core cylinder end column.

2. The structural steel supporting platform with the semi-self-supporting high-altitude large cantilever type steel concrete structure and the construction method of the structural steel supporting platform with the semi-self-supporting high-altitude large cantilever type steel concrete structure as claimed in claim 1 are characterized in that: the type of the structural steel supporting platform member is not limited to H-shaped, I-shaped or box-shaped sections, and the structural bearing capacity and the normal use requirement can be met.

3. The structural steel supporting platform with the semi-self-supporting high-altitude large cantilever type steel concrete structure and the construction method of the structural steel supporting platform with the semi-self-supporting high-altitude large cantilever type steel concrete structure as claimed in claim 2 are characterized in that: the components are connected by welding to form a stable three-dimensional space stress system.

4. A semi-self-supporting type high-altitude large-cantilever section steel concrete structure section steel supporting platform and a construction method are characterized by comprising the following steps:

the method comprises the following steps: at a certain position below the height of the steel reinforced concrete structure (only an operating space is reserved for erecting an upper frame body), two main steel beams which are horizontally crossed and run through the concrete core barrel are hoisted in place by an automobile crane or a tower crane and are welded and fixed with vertical steel ribs contained in the end column of the prokaryotic core barrel;

hoisting the section steel inclined strut in place by a truck crane or a tower crane, and respectively welding and fixing the section steel inclined strut with the end column steel rib and the main steel beam in the step one, wherein the requirement that the included angle between the inclined strut and the horizontal steel beam is 45 ~ 60 degrees is met;

step three: hoisting the secondary beam in place at the height positions of two ends of the inclined strut by adopting an automobile crane or a tower crane, and welding and fixing the secondary beam with the main steel beam in the step one;

step four: laying steel purlines with fixed intervals, and welding and fixing the steel purlines with supporting steel beams at two ends to form a stable three-dimensional space stress system, and erecting a steel section supporting platform;

step five: erecting a steel pipe support frame;

step six: erecting a beam template and a plate template;

step seven: pouring concrete and maintaining;

step eight: removing and transferring the template and the bracket;

step nine: and (5) hoisting and dismantling the section steel platform.

Technical Field

The invention relates to the technical field of building construction, in particular to a semi-self-supporting type high-altitude large-cantilever steel reinforced concrete structure section steel supporting platform and a construction method.

Background

The high-altitude large cantilever structure, particularly the single-core-tube support and the high-altitude two-end large cantilever structure, a conventional concrete beam cannot effectively resist self weight and vertical wind load, and the structural steel concrete beam is frequently adopted to increase the rigidity of a horizontal beam to effectively resist various loads in design. For example, in the Nanchang Wanke landscape tower project, the vertical structure is a circular concrete core tube with the outer diameter of 7.2m, and a large-cantilever type steel reinforced concrete beam plate structure with the east-west span of 7m and the south-north direction of 21.5m is arranged at the height of 27.80m and is used for supporting the steel truss of the outermost ring. The section of the steel reinforced concrete beam is 600x1600, and the plate thickness is 150 mm. The cantilever structure is high in construction height and cantilever, and support needs to be considered during construction.

If the support system adopts a common floor type steel pipe support frame, firstly, the height is set up to be higher, and the support system is set up along the north and south of the core cylinder, the height-width ratio of the support body is larger, in order to ensure the integral stability and rigidity of the support body, the distance between the rod pieces must be encrypted, a large amount of steel pipe materials are inevitably input, and the operation is uneconomical and inconvenient; and secondly, the erection of the floor type scaffold inevitably delays the steel structure operation and prolongs the construction period due to the requirement of a steel structure hoisting operation field.

Therefore, aiming at the high-altitude large-cantilever type steel concrete structure, how to design a set of effective supporting system is to complete the construction of the large-cantilever type steel concrete beam plate structure with quality and quantity guaranteed on the premise of not occupying other professional construction sites and not influencing the construction period and guaranteeing the structure safety, and the technical problem to be solved urgently in the field is formed.

Disclosure of Invention

The invention provides a semi-self-supporting type high-altitude large-cantilever section steel concrete structure section steel supporting platform and a construction method, solves the construction problems of superelevation, large cantilever, overlarge supporting height, influence on cross operation caused by landing and the like, and has the advantages of simplicity in operation, direct and definite stress, strong bearing capacity, good stability, safety, economy and the like.

In order to solve the technical problems, the invention adopts the following technical scheme: a semi-self-supporting type high-altitude large-cantilever section steel concrete structure section steel supporting platform and a construction method are designed, and the platform is used for supporting a steel pipe supporting frame. The steel platform comprises a prokaryotic core tube end column, wherein vertical steel ribs, profile steel inclined struts, primary and secondary steel beams and purlins are contained in the prokaryotic core tube end column, the upper load is firstly transmitted to the primary and secondary steel beams through the purlins and then transmitted to the inclined struts and the vertical steel ribs through the primary and secondary steel beams, and a stable three-dimensional space stress system is formed.

Preferably, the type of the members is not limited to H-shaped, I-shaped or box-shaped sections, and the like, and the members are connected by welding as long as the structural bearing capacity and the normal use requirements are met.

A semi-self-supporting type high-altitude large-cantilever section steel concrete structure section steel supporting platform and a construction method are characterized by comprising the following steps:

the method comprises the following steps: at a certain position below the height of the steel reinforced concrete structure (only an operating space is reserved for erecting an upper frame body), two main steel beams which are horizontally crossed and run through the concrete core barrel are hoisted in place by an automobile crane or a tower crane and are welded and fixed with vertical steel ribs contained in the end column of the prokaryotic core barrel;

hoisting the section steel inclined strut in place by a truck crane or a tower crane, and respectively welding and fixing the section steel inclined strut with the end column steel rib and the main steel beam in the step one, wherein the requirement that the included angle between the inclined strut and the horizontal steel beam is 45 ~ 60 degrees is met;

step three: hoisting the secondary beam in place at the height positions of two ends of the inclined strut by adopting an automobile crane or a tower crane, and welding and fixing the secondary beam with the main steel beam in the step one;

step four: laying steel purlines with fixed intervals, and welding and fixing the steel purlines with supporting steel beams at two ends to form a stable three-dimensional space stress system, and erecting a steel section supporting platform;

step five: erecting a steel pipe support frame;

step six: erecting a beam template and a plate template;

step seven: pouring concrete and maintaining;

step eight: removing and transferring the template and the bracket;

step nine: and (5) hoisting and dismantling the section steel platform.

Compared with the prior art, the invention has the beneficial effects that:

the structural steel supporting platform provided by the invention has the advantages that the structural parts are standardized in size and specification, the structural parts are widely applied to building engineering, renting and purchasing are easy in the market, meanwhile, the damage rate of the dismantled structural steel members is low, the recovery value is high, the structural parts are structurally used as a three-dimensional space structural steel truss, the structural parts have the characteristics of high bearing capacity and high stability coefficient, the platform fully utilizes steel ribs of a permanent structure as vertical supports, hoisting machinery is not additionally occupied in the process of erection and disassembly, therefore, cross operation is not influenced, and effective supports are provided for erection of upper steel pipe supporting frames.