阅读说明：本技术 一种可周转定型化钢结构施工电梯基础 (Can have enough to meet need regularization steel construction elevator basis ) 是由 闫亚团 李兵生 骆发江 许广兴 李鹏 刘勇 李守富 王腾 贺涛 景鹏超 张勤雄 于 2019-11-21 设计创作，主要内容包括：本发明公开了一种可周转定型化钢结构施工电梯基础,适用于市面上主流厂家通用型施工电梯的基础。所述钢结构主架体为主梁1和次梁2连接成基础主架体,其余部件通过螺栓连接成基础整体,基础与基础下方的钢筋混凝土结构顶板通过螺栓与固定部7固定。根据施工电梯使用说明书的各项参数,通过受力分析对比及三维建模深化设计形成可周转定型化钢结构电梯基础施工图,由施工电梯厂家进行加工制作。施工电梯基础可现场安装,一次成型,施工简单快捷,通用性强,可周转使用,有效节约工期,节约成本。(The invention discloses a construction elevator foundation with a rotatable and stereotyped steel structure, which is suitable for a universal construction elevator foundation of mainstream manufacturers in the market. The steel structure body frame body connects into basic body frame body for girder 1 and secondary beam 2, and all the other parts pass through the bolted connection and become the basis whole, and the reinforced concrete structure roof of basis and basis below passes through the bolt and fixes with fixed part 7. According to various parameters of a construction elevator use specification, a recyclable and finalized steel structure elevator foundation construction drawing is formed through stress analysis comparison and three-dimensional modeling deepening design and is processed and manufactured by a construction elevator manufacturer. The construction elevator foundation can be installed on site, is formed in one step, is simple and quick to construct, high in universality and capable of being used in a circulating mode, effectively saves the construction period and saves the cost.)

1. The turnover forming steel structure construction elevator foundation is characterized by comprising a main beam (1) and a secondary beam (2), wherein the main beam (1) and the secondary beam (2) are welded to form a foundation main frame body; the main beam, the secondary beam and the fixing part (7) are welded; the fixing part is fixed with a reinforced concrete structure top plate (12) below the construction elevator foundation through a first bolt (81); the main beam is fixedly connected with a damping part (9) through a second bolt (82), and the damping part is of a cylindrical structure with a built-in spring (10).

2. The turnover sizing steel structure construction elevator foundation of claim 1, wherein the main beam is fixedly connected with a first adjustable connecting rod (41) through a second bolt; the first adjustable connecting rod is provided with bolt holes for second bolts (82) which are distributed at equal intervals;

the secondary beam is fixedly connected with a second adjustable connecting rod (42) through a second bolt (82); the second adjustable connecting rod is provided with bolt holes of second bolts (82) which are distributed at equal intervals;

the main beam is fixedly connected with the first connecting piece (31) through a second bolt (82);

the outer frame (6) is fixedly connected with the second connecting piece (32) through a second bolt (82).

3. The turnover forming steel structure construction elevator foundation of claim 1 or 2, wherein the main beam is formed and welded into a frame body by two longitudinal I-beams and four transverse I-beams; and the two secondary beams are respectively formed and welded into a frame body by two longitudinal I-shaped steels and one transverse I-shaped steel.

4. The turnover sizing steel structure construction elevator foundation of claim 1 or 2, characterized in that the outer frame is a square steel pipe and is connected with the second bolt (82) into a frame whole through a fixed corner fitting (11).

5. The turnover sizing steel structure construction elevator foundation of claim 4, wherein the connecting pieces, the diagonal braces (5) of the connecting rods, and the fixed corner fittings are equilateral angles; the adjustable connecting rod is a square steel pipe.

Technical Field

The invention relates to the field of elevator construction, in particular to a construction elevator foundation with a rotatable and stereotyped steel structure.

Background

With the rapid development of high-rise buildings, construction elevators are more and more widely applied. The conventional construction elevator foundation adopts a disposable cast-in-place reinforced concrete foundation, is inconvenient to disassemble and assemble and causes waste, and also has the problem of low construction efficiency.

Disclosure of Invention

The invention aims to solve the technical problem of providing a circulating and sizing steel structure construction elevator foundation, which meets the safe and reliable stress performance better than the traditional cast-in-place reinforced concrete construction elevator foundation, and simultaneously solves the problems of slow construction, waste materials and incapability of circulating use of the traditional cast-in-place reinforced concrete construction elevator foundation.

The technical problem to be solved by the invention is implemented by the following technical scheme:

a steel structure construction elevator foundation capable of being circularly shaped is characterized by comprising a main beam and a secondary beam, wherein the main beam of the foundation is formed and welded into a frame body by two longitudinal I-shaped steels and four transverse I-shaped steels; and the two basic secondary beams are respectively formed and welded into a frame body by two longitudinal I-shaped steels and one transverse I-shaped steel.

And the main beam and the secondary beam are welded to form a basic main frame body.

The main beam, the secondary beam and the fixing part are fixedly connected by welding.

The fixing part is fixed with a reinforced concrete structure top plate below the construction elevator foundation through a first bolt;

the main beam is connected with the first connecting piece through a second bolt, and the outer frame is connected with the second connecting piece through a second bolt.

The main beam is fixedly connected with the first adjustable connecting rod through a second bolt, bolt holes of the second bolt are distributed on the first adjustable connecting rod at equal intervals, and horizontal adjustment can be performed according to the size of the outer frame in different specifications;

the secondary beam is fixedly connected with the second adjustable connecting rod through a second bolt, bolt holes of the second bolt are distributed on the second adjustable connecting rod at equal intervals, and horizontal adjustment can be performed according to the size of the outer frame;

the adjustable connecting rod is not fixedly connected with the connecting piece and the outer frame, and the outer frame is supported by internal friction among the adjustable connecting rod, the connecting piece and the outer frame and is not deformed by external force;

the inclined angle brace is not fixedly connected with the connecting piece and the adjustable connecting rod, and the inner connection friction among the inclined angle brace, the connecting piece and the adjustable connecting rod strengthens that the supporting outer frame is not deformed by external force.

The outer frame is made of square steel pipes and is connected with a second bolt into a whole frame through a fixed corner piece.

The main beam is fixedly connected with a damping part through a second bolt, and the damping part is a cylindrical steel structure with a built-in spring.

The connecting piece, the inclined angle brace and the fixed angle piece are equilateral angle steels; the adjustable connecting rod is a square steel pipe.

By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the invention can replace the traditional cast-in-place reinforced concrete construction elevator foundation, focuses on the research on the aspects of safe stress, convenient disassembly, assembly, turnover and the like, has the advantages of safety, reliability, stereotyped processing, turnover, simple and rapid construction and the like, obtains obvious benefits through application, and has strong popularization in similar projects.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a state diagram of the present invention in use

FIG. 3 is a top view of the present invention

FIG. 4-1 is a schematic view of the cross-sectional structure A-A of FIG. 3

FIG. 4-2 is a schematic view of the cross-sectional structure B-B of FIG. 3

5-1, 5-2 and 5-3 are schematic diagrams for calculating the punching resistance of the conventional cast-in-place reinforced concrete construction elevator foundation

FIG. 6 is a schematic diagram for calculating and using the foundation of the elevator capable of revolving and sizing the steel structure construction

Numbering in the figures: 1-foundation main beam, 2-two foundation secondary beams, 31-first connecting piece, 32-second connecting piece, 41-first adjustable connecting rod, 42-second adjustable connecting rod, 5-diagonal brace, 6-outer frame, 7-fixing part, 81-first bolt M22, 82-second bolt M10, 9-damping part, 10-spring, 11-fixed corner fitting and 12-reinforced concrete structure top plate.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4-1 and fig. 4-2, the elevator foundation with a rotatable and finalized steel structure construction mainly comprises a foundation main beam 1, a secondary beam 2, a first connecting piece 31, a second connecting piece 32, a first adjustable connecting rod 41, a second adjustable connecting rod 42, an inclined angle brace 5, an outer frame 6, a fixing part 7, a first bolt 81, a second bolt 82, a damping part 9, a spring 10, a fixing angle piece 11 and a reinforced concrete structure top plate 12.

The steel construction body frame is the basis body frame body that main beam 1 and secondary beam 2 welding become, and fixed part 7 welded connection is on the basis body frame body, and all the other parts pass through bolted connection and become the basis whole, and the reinforced concrete structure roof 12 of basis and basis below is fixed through first bolt 81 and fixed part 7.

The foundation main beam 1 is formed by welding two longitudinal 20# I-beams and four transverse 20# I-beams into a frame body in a forming mode. The two basic secondary beams 2 are respectively formed by welding two longitudinal 20# I-beams and one transverse 20# I-beam into a frame body in a shaping mode. The main beam 1 and the secondary beam 2 are connected into a basic main frame body through welding. The main foundation frame body has the advantages of stable stress, simple and convenient manufacture and convenient disassembly.

The fixing part 7 and the reinforced concrete structure top plate 12 below the construction elevator foundation are fixed through a first bolt 81, so that the main beam 1 and the secondary beam 2 of the main stress component are fixed on the reinforced concrete structure stress component 12 by the fixing part 7; the fixing part 7 is made of a steel plate with the thickness of about 20 mm;

the main beam 1 is fixedly connected with the first connecting piece 31 through a second bolt 82, and the outer frame 6 is fixedly connected with the second connecting piece 32 through a second bolt 82;

the main beam 1 is fixedly connected with the first adjustable connecting rod 41 through a second bolt 82, bolt holes of the second bolt 82 are distributed on the first adjustable connecting rod 41 at an interval of 50mm, and horizontal adjustment can be performed according to the size of the outer frame 6 in different specifications;

the secondary beam 2 is fixedly connected with the adjustable connecting rod 42 through a second bolt 82, bolt holes of the second bolt 82 are distributed on the second adjustable connecting rod 42 at an interval of 50mm, and horizontal adjustment can be performed according to the size of the outer frame 6 in different specifications;

the adjustable connecting rod 4 is not fixedly connected with the connecting piece 3 and the outer frame 6, and the outer frame 6 is supported by internal friction among the three without deformation under external force;

the inclined angle support 5 is not fixedly connected with the connecting piece 3 and the adjustable connecting rod 4, and the inner-connected friction among the inclined angle support, the connecting piece 3 and the adjustable connecting rod strengthens that the supporting outer frame 6 is not deformed by external force.

The outer frame 6 is formed by connecting four 100X 100 square steel pipes into a whole through fixed corner fittings 9 and is connected into a frame whole through fixed corner fittings 11. The outer frame 6 and the connecting member 3 are fixedly connected using the second bolt 82.

The connecting piece 3 adopts L6.3 multiplied by 4 equal-edge angle steel, the adjustable connecting rod 4 is a 50 multiplied by 50 square steel pipe, the inclined angle brace 5 is L3 multiplied by 3 equal-edge angle steel, and the fixed angle piece 9 is L10 multiplied by 6 equal-edge angle steel.

The main beam 1 is fixedly connected with a damping part 9 through a second bolt 82, the damping part 9 is a cylindrical Q345B steel structure with an internal spring 10, and the damping part 9 reduces the impact of the vibration when the construction elevator car falls to the ground through the telescopic deformation of the internal spring 10 in the cylinder, thereby achieving the damping effect.

The first bolt is an M22 bolt and the second bolt is an M10 bolt.

Compared with the traditional reinforced concrete construction elevator foundation, the turnover and sizing steel structure construction elevator foundation has the following advantages that: the prefabricated processing preparation shaping of mill, on-the-spot installation once, the construction is simple and convenient, only can be under construction in 1 day and accomplish, and on-the-spot low in labor strength, simultaneously, can have enough to meet the need finalized and stereotyped steel construction elevator basis and dismantle back repeatedly the installation and use, can have enough to meet the need number of times 100 at least.

In the embodiment, compared with the conventional cast-in-place reinforced concrete construction elevator foundation, the stress is tested and analyzed, and the test steps and parameter results are as follows:

and (3) testing the object, namely performing stress analysis on the aspects of bearing capacity, anti-shear performance and stability mainly through a basic main frame body formed by welding the main beam 1 and the secondary beam 2. The foundation main beam 1 is formed by welding two longitudinal 20# I-beams and four transverse 20# I-beams into a frame body in a forming mode. The two basic secondary beams 2 are respectively formed by welding two longitudinal 20# I-beams and one transverse 20# I-beam into a frame body in a shaping mode.

① conventional cast-in-place reinforced concrete construction elevator foundation comparison:

the concrete foundation size is 4000 multiplied by 6000, the thickness is 250mm, the concrete is marked with a concrete label C35, and a double-layer bidirectional reinforcing mesh is laid: HRB400 steel bar diameter 12mm, interval 200 mm.

Calculating the bending moment bearing capacity:

simplifying to plate type components, calculating the bearing capacity under the simple supporting condition:

M_MAX＝0.85f_yA_sh₀in the formula A_s＝3.14×6×6×21＝2373.8mm²；h₀＝210mm

M_MAX＝0.85×360×2373.8×210＝152.5kN·m

Punching resistance calculation:

calculation schematic, see fig. 5-1, fig. 5-2, fig. 5-3:

F_MAX＝0.7β_hpf_ta_mh_oa_m＝(a_t+a_b)/2

formula (III) β_hp-cross-sectional height coefficient of influence of die-cut load-bearing capacity, β_hp＝0.9；

h₀Effective height of the basic piercing breakdown cone, h₀＝250-60＝190mm；

a_m-die cutting the worst side of the damage cone for the calculated length;

a_tthe upper edge of the oblique cross section on the most unfavorable side of the breakdown cone is punched to be longer, and the width a of the guide rail frame is 0.65;

a_bthe lower edge length of the oblique cross-section of the most unfavourable side of the piercing cone in the region of the base area;

a_b＝a+2h₀＝0.65+2×0.19＝1.03m

a_m＝(a_t+a_b)/2＝(0.65+1.03)/2＝0.84m

F_MAX＝0.7β_hpf_ta_mh₀＝0.7×0.9×1.43×840×190/1000＝143kN

② the invention can have a circulation and shape steel structure construction elevator foundation:

calculation diagram, see fig. 6:

and (3) calculating the bearing capacity: m_MAX＝σ·W＝310×2.37＝734.7kN·m

Punching resistance calculation: f_MAX＝τ·t(I_Z/S_Z)＝180×7×172/1000＝216.72kN

Analytical conclusions after comparative tests:

through the stress analysis and comparison with the conventional cast-in-place reinforced concrete construction elevator foundation, the stress of the main frame body of the steel structure construction elevator foundation can be turned over and shaped, and the bearing capacity and the anti-shear stress of the main frame body are far higher than those of the conventional cast-in-place reinforced concrete construction elevator foundation, so that the requirements are met.

To summarize: the design and test of the construction elevator foundation with the rotatable and finalized steel structure can be particularly carried out on the foundation of the SC200/200 general construction elevator of the mainstream manufacturer, and the project department can obtain remarkable effects in the engineering test application of the reconstruction and extension project. According to the embodiment, the steel structure elevator basic construction drawing can be circulated and shaped through stress analysis and three-dimensional modeling deepened design according to various parameters of the SC200/200 type construction elevator use specification, processing and manufacturing are carried out, field installation is carried out, one-step forming is carried out, construction is simple and rapid, universality is high, circulation use can be realized, the construction period is effectively saved, and the cost is greatly saved.