CN103967040B - Tower-crane foundation structure and construction method thereof - Google Patents

Abstract

The invention provides a tower crane foundation structure and a construction method thereof, wherein the construction method includes: a process of planting concrete bars; a leveling process; and a setting process of a cap. The basic structure of the tower crane includes: concrete foundation, positioning steel bars, foundation floor and cap. The invention solves the problem that the existing tower crane foundation cannot guarantee high stability and high efficiency positioning and disassembly at the same time, greatly improves the work efficiency of tower crane construction, further reduces environmental pollution caused by construction, and meets the requirements of green construction.

Description

Tower crane foundation structure and its construction method

technical field

The invention belongs to the field of building construction, and in particular relates to a tower crane foundation structure and a construction method thereof.

Background technique

At present, tower cranes have been widely used in the field of construction. Since the stability and safety of the objects lifted by the tower crane are directly related to the foundation of the tower crane, ensuring the firmness and stability of the foundation of the tower crane has always been a particularly important part of the installation of the tower crane.

The current very common method is to pour concrete blocks as the foundation of the tower crane. However, when using the existing methods for construction, the volume of the poured concrete blocks is generally large, and the construction also needs to go through processes such as binding steel bars, supporting formwork, and pouring concrete. , which to a certain extent makes it difficult to ensure the levelness of the foundation during the concrete vibration process, and, after the tower crane is removed, the concrete foundation needs to be demolished by blasting. Obviously, this kind of practice has defects such as low construction efficiency and environmental pollution. .

Contents of the invention

In order to overcome the defects of the existing technology, a tower crane foundation structure and its construction method are provided to solve the problem that the existing tower crane foundation cannot ensure high stability and high efficiency positioning and disassembly at the same time, and greatly improve the tower crane construction. The work efficiency is improved, and the environmental pollution caused by construction is further reduced to meet the requirements of green construction.

In order to achieve the above object, the present invention firstly provides a construction method of tower crane foundation structure, comprising:

The concrete reinforcement process includes implanting a plurality of positioning steel bars on the concrete foundation to form multiple reinforcement areas corresponding to the foundation of the tower crane. The multiple positioning steel bars in the reinforcement area protrude from the concrete foundation;

The leveling process includes setting a foundation base plate correspondingly with positioning steel bars in each rebar planting area and leveling the base base plate. Fix the base plate of each reinforcement area and fill the gap between the base plate of the grouted base and the concrete foundation;

The setting process of the bearing platform includes fixing a bearing platform on each base plate, so as to fix the tower crane feet on each bearing platform respectively.

The beneficial effect of the tower crane foundation structure construction method of the present invention is that,

1) Temporarily locate the foundation floor by using positioning reinforcement;

2) Ensure the high levelness of the foundation floor through the levelness detection instrument to gradually achieve leveling;

3) To improve the stability after leveling by filling and grouting the empty base plate;

4) The high stability and high efficiency of positioning and disassembly can be achieved by fixing the tower crane foot on the bearing platform.

The further improvement of the construction method of the tower crane foundation structure of the present invention is that the formation of a single bar planting area includes: arranging a plurality of positioning steel bars regularly and implanting them in the concrete foundation respectively, so as to form a plurality of protruding positioning steel bars on the concrete foundation .

The further improvement of the construction method of the tower crane foundation structure of the present invention is that a plurality of positioning holes arranged regularly are arranged on the foundation floor, and the leveling process includes: correspondingly piercing the tops of the positioning steel bars in the positioning holes, The gap is formed between the foundations.

The further improvement of the construction method of the tower crane foundation structure of the present invention lies in that the leveling process includes: performing levelness detection and real-time adjustment on the foundation floor in each reinforcement area, until all foundation floors in multiple reinforcement areas are in the same preset high.

The further improvement of the construction method of the tower crane foundation structure of the present invention lies in that the leveling process includes: after all the foundation bottom plates in the plurality of said planting reinforcement areas are at the same preset height, for any one foundation bottom plate, first place the positioning steel bars respectively The top of the base is fixed to the base plate, and then the gap is filled with grout.

The further improvement of the construction method of the tower crane foundation structure of the present invention lies in that the setting process of the cap includes: after the filling and grouting is completed, the cap is welded to the base plate of the foundation.

The further improvement of the construction method of the tower crane foundation structure of the present invention lies in that the setting process of the bearing platform also includes: setting a positioning contour line on the upper surface of the bearing platform, so that the foundation feet of the tower crane are fixed on the bearing platform according to the positioning contour line.

In order to better achieve the above purpose, the present invention also provides a tower crane infrastructure, including:

A plurality of rebar planting areas formed on the concrete foundation and corresponding to the number of tower crane feet, and each rebar planting area is provided with a plurality of protruding positioning steel bars;

a foundation slab disposed within each rebar area and positioned on top of the locating reinforcement, all of the foundation slabs in the plurality of rebar areas being at the same predetermined height; and

The cap set on the foundation floor for the fixing of tower crane feet.

The beneficial effect of the tower crane foundation structure of the present invention is that,

1) Leveling is achieved during construction by positioning steel bars to match the structural settings of the foundation floor;

2) Flexible and stable positioning and disassembly can be achieved during construction through the structural setting of the base plate and the bearing platform.

The further improvement of the foundation structure of the tower crane of the present invention is that it also includes a leveling layer formed between the concrete and the base plate.

The further improvement of the foundation structure of the tower crane of the present invention lies in that a plurality of positioning steel bars are regularly arranged, and a plurality of positioning holes are arranged regularly on the foundation bottom plate, and the positioning steel bars correspond to the positioning holes one by one and are connected by welding; the cap is welded to the foundation bottom plate Above, the top surface of the cap has a positioning contour line for the tower crane to be fixedly connected to the top surface of the cap according to the positioning contour line.

Description of drawings

Fig. 1 is the schematic flow sheet of tower crane foundation structure construction method of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of the anchorage of the positioning steel bar of the present invention on the concrete foundation;

Fig. 3 is the top view structure schematic diagram that the present invention forms four rebar areas;

Fig. 4 is a top view structural schematic diagram of the foundation base plate of the present invention;

Fig. 5 is a schematic sectional structural view of the fixed base plate of the present invention on the basis of Fig. 3 and Fig. 4;

Fig. 6 is a schematic cross-sectional structure diagram of the present invention filling grout on the basis of Fig. 5 to form a leveling layer;

Fig. 7 is a schematic cross-sectional structure diagram of the present invention fixing the platform on the basis of Fig. 6;

Fig. 8 is a top view structural schematic diagram of the top surface of the platform of the present invention;

Fig. 9 is a schematic cross-sectional structure diagram of fixing the tower crane foot on the basis of Fig. 7 and Fig. 8 according to the present invention.

Detailed ways

In order to facilitate the understanding of the structure of the present invention, the following description will be made in conjunction with the accompanying drawings and embodiments.

With reference to Fig. 1, be the schematic flow sheet of tower crane foundation structure construction method of the present invention, as shown in Fig. 1, the present invention at first provides a kind of tower crane foundation structure construction method, comprises following several main processes:

a. Concrete reinforcement process

Referring to Fig. 2, it is a schematic cross-sectional view of the positioning steel bar 2 anchored on the concrete foundation 1 of the present invention. As shown in Fig. 2, step S1 should be performed first during construction: the required positioning steel bar needs to be calculated in advance according to the load requirements of the tower crane 2 section, quantity and anchorage depth. After the calculation is completed, a plurality of reinforcement holes arranged in a matrix form can be opened on the concrete foundation 1 formed by one-time grouting (of course, the reinforcement holes can also be arranged in other regular forms, for example, in a rice-shaped arrangement), The depth of the reinforcement hole needs to reach the calculated set value of the anchorage depth. Then, according to the construction requirements, a plurality of positioning steel bars 2 are respectively implanted in each steel bar hole, and when the positioning steel bars 2 reach the anchoring depth of the steel bar holes, the anchoring positioning steel bars 2 are naturally protruded and exposed on the concrete foundation 1 . In this manner, a rectangular bar planting area 8 is formed.

It should be noted that since the existing tower cranes generally have four feet, therefore, referring to Fig. 3, it is a schematic diagram of the top view of the four planting bar regions 8 according to the present invention, as shown in Fig. The four areas for planting bars are thus completed to complete step S1.

b. The positioning process of the base plate 3

Refer to Fig. 4, which is a schematic diagram of the top view structure of the foundation base plate 3 of the present invention, as shown in Fig. 3 and Fig. 4, for each bar planting area 8, step S2 should be performed after step S1 is completed during construction: prepare a steel plate in advance As the foundation base plate 3 , a plurality of positioning holes 30 corresponding to the positioning reinforcement bars 2 need to be opened on the base base plate 3 . During implementation, support pads can be set around the lower surface of the foundation base plate 3, so that the base base plate 3 is temporarily supported in space, and ensure that each positioning hole 30 corresponds to a positioning steel bar 2, thereby completing step S2, Realize the spaced positioning of the foundation base plate 3 .

c. The leveling process of the base plate 3

Referring to Fig. 5, it is a schematic cross-sectional structure diagram of fixing the base plate 3 of the present invention on the basis of Fig. 3 and Fig. 4. As shown in Fig. 5, for each bar planting area 8, the construction should be completed after step S2 is completed. Execute step S3: Since the base plate 3 in step S2 is temporarily supported by the space, a space 4 is naturally formed between the base plate 3 and the concrete foundation 1, whereby the base plate 3 can be leveled precise adjustment. Specifically, during implementation, a spirit level can be used to continuously detect the levelness of the foundation base plate 3 and adjust it in real time until all base base plates 3 in the four rebar planting areas 8 are at the same preset height, thereby completing In step S3, higher precision leveling of the base plate 3 is realized.

d. The fixing process of the base plate 3

Referring to Fig. 6, it is a schematic diagram of the sectional structure of filling grouting on the basis of Fig. 5 to form a leveling layer 5 according to the present invention. Execute step S4: After the levelness of the foundation base plate 3 meets the construction accuracy requirements, the most ideal situation is that the upper surface of the base base plate 3 is flush with the top of the positioning reinforcement bar 2. At this time, the positioning hole 30 can be aligned with the positioning The top of the steel bar 2 is welded and fixed, and the pads supported around the lower surface of the base plate 3 are removed, and then secondary grouting can be performed on the formed empty space 4 to fill the empty space 4 fully. After that, a leveling layer 5 is formed between the base plate 3 and the concrete foundation 1, so that the stability of the base plate 3 is greatly improved

e. The setting process of platform 6

Refer to Fig. 7, which is a schematic cross-sectional structural view of the fixed cap 6 based on Fig. 6 of the present invention. As shown in Fig. 7, for each bar planting area 8, step S5 should be executed after step S4 is completed during construction: After the leveling layer 5 is completely solidified, the platform 6 can be fixed on the base plate 3 , and ideally, the platform 6 is welded and fixed on the center of the base plate 3 .

f. The setting process of tower crane foot 7

Can refer to Fig. 8 and Fig. 9, Fig. 8 is the top view structure schematic diagram of the cap platform 6 top surface of the present invention, Fig. 9 is the cross-sectional structural schematic diagram of the present invention fixing tower crane foot 7 on the basis of Fig. 7 and Fig. 8, in conjunction with Fig. 8 As shown in Figure 9, for each rebar planting area 8, step S6 should be executed after step S5 is completed during construction: since the upper surface of each cap 6 has a positioning contour line 60, after the cap 6 is welded and fixed Therefore, the tower crane foot 7 needs to use these positioning contour lines 60 on the upper surface of the cap 6 to make the relative fixed position of the tower crane foot 7 and the cap 6 as precise as possible.

After the above steps S1 to S6 are completed, the four tower crane feet 7 should be able to be stably and accurately connected to the foundation structure of the tower crane.

The following introduces one of the tower crane foundation structures that can be formed by applying the above-mentioned tower crane foundation structure construction method (the application tower crane foundation structure construction method of the present invention should not be limited to the following this tower crane foundation structure):

Referring to Fig. 7, it is a schematic sectional structure diagram of the fixed cap of the present invention on the basis of Fig. 6, and it is also a schematic sectional structural diagram of the tower crane foundation structure of the present invention. As shown in Fig. 7, the present invention also provides a tower crane foundation structure, It includes: a concrete foundation 1 formed by one-time grouting; a plurality of positioning steel bars 2 fixed on the concrete foundation 1; a foundation bottom plate 3 arranged on the top of the positioning steel bars 2;

As shown in Figure 8 and Figure 9, in this embodiment, the concrete foundation 1 is formed in the pit excavated on the ground of the construction site; round steel bars can be selected as the positioning reinforcement 2, and after all the positioning reinforcement 2 is fixed on the concrete foundation 1, It is necessary to form four bar-planting areas 8 as shown in Figure 3, and each bar-planting area 8 has the above-mentioned structural features included in the tower crane foundation structure of the present invention as shown in Figure 7; the square steel plate is selected as the base plate 3 , in order to correspond to the round steel bar, a circular positioning hole 30 is provided on the base plate 3, and the positioning steel bars 2 and the positioning holes 30 are arranged in a matrix and connected by welding; and, the base plate 3 and the concrete foundation 1 are grouted twice A leveling layer 5 is formed by filling; the trapezoidal cap 6 is welded and fixed on the center of the upper surface of the base plate 3, and the upper surface of the cap 6 is provided with a plurality of positioning contour lines 60 for the tower crane foundation 7 Accurately fixed on the upper surface of platform 6.

After completing the above-mentioned implementation process, it should be able to reflect the following characteristics of the tower crane foundation structure of the present invention and its construction method:

1) Realize high-efficiency structural construction and facilitate demolition;

2) Use common steel bars and steel plates to solve leveling problems;

3) A stable foundation structure is obtained by forming a leveling layer through secondary grouting.

The present invention has been described in detail above with reference to the embodiments of the accompanying drawings, and those skilled in the art can make various changes to the present invention according to the above description. Therefore, some details in the embodiments should not be construed as limiting the present invention, and the scope of the present invention will be defined by the appended claims as the scope of protection.

Claims (9)

1. A tower crane foundation structure construction method, is characterized in that, comprises: The process of planting concrete bars includes implanting positioning steel bars on the concrete foundation to form multiple planting bar areas corresponding to the feet of the tower crane, and multiple positioning steel bars in the planting bar areas protrude from the concrete foundation superior; The leveling process includes, in each of the bar planting areas, using the positioning steel bars to set a base plate correspondingly and leveling the base plate. When all the base plates in the multiple bar planting areas are in the After the same preset height, fix the foundation bottom plate in each of the planting reinforcement areas through the positioning steel bars and fill the gap between the foundation bottom plate and the concrete foundation for grouting; The setting process of the bearing platform includes fixing a bearing platform on each of the foundation base plates, so as to fix the tower crane feet on each of the bearing platforms respectively. 2. tower crane foundation structure construction method according to claim 1, is characterized in that, The process of forming a single bar-planting area includes: arranging a plurality of positioning steel bars regularly and respectively implanting them in the concrete foundation, so as to form a plurality of positioning steel bars protruding above the concrete foundation . 3. tower crane foundation structure construction method according to claim 2, is characterized in that, The foundation base plate is provided with a plurality of positioning holes regularly arranged; The leveling process includes: piercing the tops of the positioning steel bars in the positioning holes respectively, and forming the gap between the base plate and the concrete foundation. 4. tower crane foundation structure construction method according to claim 3, is characterized in that, The leveling process includes: performing levelness detection and real-time adjustment on the foundation baseplates in each of the rebar planting areas until all the base baseplates in multiple rebar planting areas are at the same preset height. 5. tower crane foundation structure construction method according to claim 4, is characterized in that, The leveling process includes: after all the base plates in the plurality of bar planting areas are at the same preset height, for any one of the base plates, first respectively align the top of the positioning reinforcement with the base The bottom plate is fixed, and then the gap is filled with grout. 6. The tower crane foundation structure construction method according to claim 1 or 5, characterized in that, The setting process of the platform includes: after the filling and grouting is completed, welding the platform to the base plate. 7. the construction method of tower crane foundation structure according to claim 6, is characterized in that, The setting process of the platform further includes: setting a positioning contour line on the upper surface of the platform, so that the tower crane foot is fixed on the platform according to the positioning contour line. 8. A tower crane foundation structure, characterized in that it comprises: A plurality of rebar planting areas formed on the concrete foundation and corresponding to the foundation of the tower crane, each of the rebar planting areas is provided with a plurality of protruding positioning steel bars; a foundation base plate arranged in each of the rebar planting areas and positioned on top of the positioning reinforcement, and all the base base plates in the plurality of rebar planting areas are at the same preset height; and a cap set on each of the base plates for fixing the tower crane feet; A plurality of positioning steel bars are regularly arranged, and a plurality of positioning holes are regularly arranged on the foundation base plate, and the positioning steel bars correspond to the positioning holes one by one and are connected by welding; The cap is welded to the base plate, and the top surface of the cap has a positioning contour line for the tower crane foot to be fixedly connected to the top surface of the cap according to the positioning contour line. 9. The tower crane foundation structure according to claim 8, characterized in that, A screed formed between the concrete and the foundation slab is also included.