Positioning and adjusting lengthening frame for supporting latticed column in deep foundation pit

Abstract

The utility model relates to a deep foundation pit inner support latticed column positioning and adjusting lengthening frame which comprises a cast-in-place pile, a steel latticed column, a connecting screw rod, a rotating shaft, a positioning steel bar ring, a pile hole and a verticality adjusting frame, and positioning angle steel comprises a steel latticed column to be lengthened and an installed steel latticed column. The device has the advantages that the verticality adjusting frame and the steel latticed column to be connected are used for controlling the upper positioning and rotating angle of the latticed column, then the positioning and rotating angle of the top of the latticed column are controlled, the upper positioning of the latticed column is completed, and the device is easy to operate, convenient to manufacture, rapid to assemble and disassemble and capable of being repeatedly used and has good social benefits; the lower portion of the latticed column is positioned through the geometric fit relation between the positioning steel bar rings and the pile holes, the problem that the later reworking risk is caused by too large deviation of the latticed column in a traditional reverse construction method is solved, and the construction precision of the latticed column is improved.

Description

Technical Field

[0001] The utility model relates to the field of a support lattice column extension frame in a foundation pit, in particular to a support lattice column positioning and adjustment extension frame in a deep foundation pit. Background Art

[0002] With the rapid development of domestic cities, urban land is becoming increasingly scarce, buildings are becoming taller and taller, underground floors are increasing, foundation pit excavation depths are becoming deeper, and the surrounding environment of foundation pits is becoming more and more complex. The reverse construction method is increasingly widely used in foundation pit support design due to its advantages of high construction safety and little impact on the surrounding environment of the foundation pit.

[0003] In the reverse construction method, the vertical support structure generally adopts the form of "single pile and single column", that is, the lower part is a cast-in-place pile and the upper part is a steel structure column. Before the construction of the vertical structure of the basement, the lattice column bears the deadweight and construction load of the upper horizontal structure. Later, the lattice column is wrapped with reinforced concrete as the permanent structural column of the basement. The construction accuracy is high. If the deviation is too large, it will affect the construction of the formal structural column and there will be certain safety hazards. Therefore, its construction quality is extremely important.

[0004] In traditional practices, the lattice column is connected to the steel cage and then hoisted simultaneously. After being lowered, the positioning accuracy of the lattice column is difficult to adjust. During the subsequent concrete pouring process, the lattice column is easily disturbed, thereby affecting its positioning, verticality and rotation angle.

[0005] Therefore, it is necessary to develop a simple, effective and easy-to-operate positioning and adjustment extension frame for supporting lattice columns in deep foundation pits to ensure the positioning accuracy of lattice columns and improve construction efficiency and quality. Utility Model Content

[0006] The utility model aims to overcome the deficiencies in the prior art and provide a positioning, adjusting and extending frame for supporting lattice columns in a deep foundation pit.

[0007] The deep foundation pit support lattice column positioning adjustment extension frame comprises cast-in-place piles, steel lattice columns, connecting screws, rotating shafts, positioning steel bar rings, pile holes and vertical adjustment frames, and the positioning angle steels include steel lattice columns to be extended and installed steel lattice columns;

[0008] The vertical adjustment frame includes a channel steel cross bar, two channel steel cross bars are placed in parallel, two connecting rods are welded between the two channel steel cross bars, and the two connecting rods are rotated toward each other and provided with steel hinges, and the steel hinges are closed to form a guide limit groove;

[0009] The steel lattice column is symmetrically welded with limiting tracks on both sides, the positioning angle steel is slidably fixed along the limiting tracks, the connecting screw is fixed to both sides of the long steel lattice column to be connected through the positioning angle steel, and the bottom of the connecting screw is fixed to the positioning angle steel of the installed steel lattice column.

[0010] Preferably, an arc-shaped connecting block is provided between the connecting rod and the channel steel cross bar; a support rod is provided at the end of the channel steel cross bar, and a base is installed at the bottom of the support rod for supporting on the ground to ensure the horizontality of the vertical adjustment frame; a rotating shaft is provided above the connecting rod, and a steel hinge is connected to the rotating shaft so that it can be flipped; by closing the steel hinges on the left and right sides, a guide limit groove is formed when the steel lattice column falls.

[0011] Preferably, a positioning groove is provided on the limiting rail, a sliding block is provided on the positioning angle steel, and the sliding block is placed in the positioning groove for positioning and installing the positioning angle steel.

[0012] Preferably, the positioning angle steel is provided with a through hole, and the connecting screw rod passes through the through hole on the steel lattice column to be connected and the through hole of the installed steel lattice column; the top and bottom ends of the connecting screw rod are fixed by nuts.

[0013] Preferably, a positioning steel bar ring is welded to the lower part of the installed steel lattice column, and the lower part of the steel lattice column is positioned to fit the pile hole through the positioning steel bar ring.

[0014] The beneficial effects of the utility model are:

[0015] 1) The utility model utilizes a vertical adjustment frame and a long steel lattice column to be connected to control the upper positioning and rotation angle of the lattice column, thereby controlling the positioning and rotation angle of the top of the lattice column to complete the upper positioning of the lattice column. The utility model is simple to operate, convenient to manufacture, quick to install and disassemble, and reusable, and has good social benefits.

[0016] 2) The utility model utilizes the geometric fit between the positioning steel bar ring and the pile hole to complete the lower positioning of the lattice column, thereby solving the problem of the traditional reverse construction method causing the risk of rework in the later stage due to the large deviation of the lattice column, and improving the construction accuracy of the lattice column. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a positioning and adjusting extension frame for supporting lattice columns in a deep foundation pit;

[0018] Figure 2 It is a structural schematic diagram of a steel lattice column vertical adjustment frame;

[0019] Figure 3 It is a cross-sectional view of the positioning and adjustment extension frame of the supporting lattice column in the deep foundation pit;

[0020] Figure 4 It is a plan view of positioning the reinforcement ring;

[0021] Figure 5 It is a structural schematic diagram of a steel lattice column extension frame;

[0022] Figure 6 It is a structural diagram of the positioning angle steel connection.

[0023] In the figure: 1- cast-in-place pile, 2- steel lattice column, 3- slider, 4- positioning angle steel, 5- connecting screw, 6- limiting track, 7- supporting rod, 8- channel steel cross bar, 9- arc connecting block, 10- connecting rod, 11- limiting groove, 12- steel hinge, 13- rotating shaft, 14- base, 15- positioning steel bar ring, 16- pile hole, 17- through hole, 18- positioning groove, 19- long steel lattice column to be connected, 20- installed steel lattice column. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0025] As an example, Figures 1 to 6 As shown, the deep foundation pit supporting lattice column positioning adjustment extension frame includes cast-in-place piles 1, steel lattice columns 2, connecting screws 5, rotating shafts 13, positioning steel bar rings 15, pile holes 16 and vertical adjustment frames, and the positioning angle steels 4 include steel lattice columns 19 to be extended and installed steel lattice columns 20;

[0026] The vertical adjustment frame includes a channel steel cross bar 8, two channel steel cross bars 8 are placed in parallel, two connecting rods 10 are welded between the two channel steel cross bars 8, and the two connecting rods 10 are rotated toward each other and provided with steel hinges 12, and the steel hinges 12 are closed to form a guide limit groove 11;

[0027] The steel lattice column 2 is symmetrically welded with limiting rails 6 on both sides, the positioning angle steel 4 is slidably fixed along the limiting rails 6, the connecting screw 5 is fixed on both sides of the long steel lattice column 19 to be connected through the positioning angle steel 4, and the bottom of the connecting screw 5 is fixed to the positioning angle steel 4 of the installed steel lattice column 20.

[0028] The deep foundation pit supporting lattice column positioning adjustment extension frame is provided with a steel lattice column 2 vertical adjustment frame; the deep foundation pit supporting lattice column positioning adjustment extension frame is provided with a steel lattice column 2 extension frame; the deep foundation pit supporting lattice column positioning adjustment extension frame is installed with a positioning steel bar ring 15.

[0029] The two channel steel cross bars 8 are placed in parallel, and two connecting rods 10 are welded in the middle. An arc-shaped connecting block 9 is arranged between the connecting rod 10 and the channel steel cross bar 8 to strengthen the integrity of the structure; a support rod 7 is arranged at the end of the channel steel cross bar 8, and a base 14 is installed at the bottom of the support rod 7 to ensure the horizontality of the bottom surface of the vertical adjustment frame; a rotating shaft 13 is arranged above the connecting rod 10, and a steel hinge 12 is connected to the rotating shaft 13 and can be turned over; by closing the steel hinges 12 on the left and right sides, a guide limit groove 11 is formed when the steel lattice column 2 falls, thereby ensuring the positioning accuracy of the steel lattice column 2.

[0030] The steel lattice column 2 is symmetrically welded with limiting rails 6 on both sides, and a slider 3 is set on the positioning angle steel 4. The slider is placed in the positioning groove 18 to quickly position and install the positioning angle steel 4; the connecting screw 5 passes through the reserved through hole 17 of the angle steel on the steel lattice column 19 to be connected, and finally passes through the reserved through hole 17 of the angle steel of the installed steel lattice column 20; nuts are tightened at the top and bottom ends of the connecting screw 5 to fix the connecting screw 5; the installed steel lattice column 20 is stably extended to 700mm above the ground by using an extension frame, so as to achieve the purpose of adjusting the positioning and rotation angle of the installed steel lattice column 20 by surface operation.

[0031] The lower part of the installed steel lattice column 20 is welded with a positioning steel ring 15, which is slightly smaller than the pile hole 16. The lower part of the steel lattice column 2 is positioned to fit the pile hole 16 through the geometric size relationship between the positioning steel ring 15 and the pile hole 16, completing the lower positioning of the lattice column.

[0032] During actual construction, the upper positioning and rotation angle of the steel lattice column 2 are controlled by the vertical adjustment frame and the extension frame, and then the positioning and rotation angle of the top of the installed steel lattice column 20 are controlled to complete the upper positioning of the installed steel lattice column 20; the lower positioning of the installed steel lattice column 20 is completed by the geometric fit relationship between the positioning steel bar ring 15 and the pile hole 16. Through the above-mentioned vertical adjustment frame, the extension frame and the positioning steel bar ring 15, the positioning, verticality and rotation angle of the engineering lattice column can be controlled.

Claims

1. A positioning and adjusting extension frame for supporting lattice columns in a deep foundation pit, characterized in that: It includes cast-in-place piles, steel lattice columns, connecting screws, rotating shafts, positioning steel bar rings, pile holes and vertical adjustment frames. The positioning angle steels include the long steel lattice columns to be connected and the installed steel lattice columns; The vertical adjustment frame includes a channel steel cross bar, two channel steel cross bars are placed in parallel, two connecting rods are welded between the two channel steel cross bars, and the two connecting rods are rotated toward each other and provided with steel hinges, and the steel hinges are closed to form a guide limit groove; The steel lattice column is symmetrically welded with limiting tracks on both sides, the positioning angle steel is slidably fixed along the limiting tracks, the connecting screw is fixed to both sides of the long steel lattice column to be connected through the positioning angle steel, and the bottom of the connecting screw is fixed to the positioning angle steel of the installed steel lattice column.

2. The positioning, adjusting and extending frame for supporting lattice columns in deep foundation pits according to claim 1 is characterized in that: An arc-shaped connecting block is arranged between the connecting rod and the channel steel cross bar; a supporting rod is arranged at the end of the channel steel cross bar, and a base is installed at the bottom of the supporting rod, which is used to support it on the ground to ensure the horizontality of the vertical adjustment frame; a rotating shaft is arranged above the connecting rod, and a steel hinge is connected to the rotating shaft so that it can be flipped; by closing the steel hinges on the left and right sides, a guide limit groove is formed when the steel lattice column falls.

3. The positioning, adjusting and extending frame for supporting lattice columns in deep foundation pits according to claim 1, characterized in that: A positioning groove is provided on the limiting track, a slider is provided on the positioning angle steel, and the slider is placed in the positioning groove for positioning and installing the positioning angle steel.

4. The positioning, adjusting and extending frame for supporting lattice columns in deep foundation pits according to claim 3 is characterized in that: The positioning angle steel is provided with a through hole, and the connecting screw rod passes through the through hole on the long steel lattice column to be connected and the through hole of the installed steel lattice column; the top and bottom ends of the connecting screw rod are fixed by nuts.

5. The positioning, adjusting and extending frame for supporting lattice columns in deep foundation pits according to claim 1, characterized in that: A positioning steel bar ring is welded at the lower part of the installed steel lattice column, and the lower part of the steel lattice column is positioned to fit the pile hole through the positioning steel bar ring.

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