A kind of anti-pullout restraint device of tower crane foundation and construction method thereof

Abstract

The present invention relates to an anti-pulling restraint device for a tower crane foundation and a construction method thereof, wherein the device comprises a standard section of a steel tower crane, a basement top plate, a pumping system and a jack system, wherein the standard section of the steel tower crane passes through the basement top plate and is fixedly connected to the basement top plate; the pumping system comprises a buoyancy detection element and a pumping pump, wherein the buoyancy detection element is installed on the standard section of the steel tower crane, and the buoyancy detection element is connected to the pumping pump signal; the jack system comprises a load-bearing steel beam, a lifting hydraulic jack and a lowering hydraulic jack, wherein the load-bearing steel beam is transversely fixed on the standard section of the steel tower crane, and the lifting hydraulic jack and the lowering hydraulic jack are respectively fixed under the load-bearing steel beam. The present invention can ensure that the anti-pulling bearing capacity of the tower crane foundation meets the requirements, ensure construction safety, and ensure the smooth operation of the tower crane.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to an anti-pulling restraint device for a tower crane foundation and a construction method thereof. Background Art

[0002] In the construction environment where the tower crane foundation is a plate pile foundation, the tower crane piles usually need to be restrained and reinforced because the pull-out bearing capacity cannot meet the requirements. In coastal areas, due to the proximity to the sea and the influence of waves and tides, the groundwater level is usually high, especially in the reclaimed beach areas, where the groundwater level is high and the water level changes greatly, the geological conditions are poor, and the buoyancy generated by the groundwater has a great impact on the underground structure. In order to avoid the impact of the high groundwater level on the floating of the building and resist the upward displacement of the building, the anti-floating of the underground structure of the deep foundation pit in the coastal beach area is often in the form of anti-floating anchor rods or pull-out piles.

[0003] Anti-floating anchor rod: It is a kind of anti-floating measure for underground structures in construction projects. It is a structural component set up to resist the upward displacement of the buildings above it. It is related to the height and change of the groundwater level. Anti-floating anchor rods need to be constructed simultaneously with the construction of the tower crane foundation and cannot be added later.

[0004] Pull-out piles: widely used in large basement anti-floating, high-rise building (structure) anti-pulling, etc. When the underground structure of a construction project is lower than the surrounding soil water level, piles are driven to offset the buoyancy of the structure caused by water in the soil. The main mechanism of pull-out piles is to rely on the friction between the pile body and the soil layer to resist axial tension. Such as anchor piles, anti-floating piles, etc. However, with the influence of waves and tides, the water buoyancy and the tower crane foundation load are superimposed, and the pull-out bearing capacity of the tower crane foundation pull-out piles can no longer meet the requirements.

[0005] Therefore, how to provide a pull-out restraint device of a tower crane foundation and a construction method thereof that can adjust the pull-out bearing capacity according to the external environment of the tower crane foundation is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] The present invention provides an anti-pulling restraint device for a tower crane foundation and a construction method thereof to solve the above technical problems.

[0007] In order to solve the above technical problems, the present invention provides an anti-pulling restraint device for a tower crane foundation, comprising a standard section of a steel tower crane, a basement top plate, a pumping system and a jack system, wherein:

[0008] The standard section of the steel tower crane passes through the basement top plate and is fixedly connected to the basement top plate;

[0009] The pumping system includes a buoyancy detection element and a pumping pump, wherein the buoyancy detection element is installed on the standard section of the steel tower crane, and the buoyancy detection element is connected to the pumping pump signal;

[0010] The jack system includes a load-bearing steel beam, a lifting hydraulic jack and a lowering hydraulic jack. The load-bearing steel beam is transversely fixed on the standard section of the steel tower crane, and the lifting hydraulic jack and the lowering hydraulic jack are respectively fixed under the load-bearing steel beam.

[0011] Preferably, the standard section of the steel tower crane is assembled from transverse steel sections, vertical steel sections and oblique steel sections.

[0012] Preferably, the standard section of the steel tower crane is fixedly connected to the basement top plate via a "tic-tac-toe" restraint frame, the "tic-tac-toe" restraint frame is fixedly connected to the basement top plate via anchoring U-shaped bars, and the "tic-tac-toe" restraint frame is fixedly connected to the standard section of the steel tower crane via an L-shaped angle steel connector.

[0013] Preferably, a wooden wedge is inserted between the "tic-tac-toe" restraint frame and the anchoring U-shaped rib.

[0014] Preferably, the anchoring U-shaped bar includes a U-shaped steel bar and a top angle steel, the top angle steel is arranged above the "well-shaped" restraint frame, the bottom of the U-shaped steel bar is embedded in the basement roof, the top of the U-shaped steel bar passes through the "well-shaped" restraint frame and is fixedly connected to the top angle steel, and the wooden wedge is arranged in the gap between the U-shaped steel bar and the "well-shaped" restraint frame.

[0015] Preferably, the water pumping system further comprises a display, a trigger module and an automatic water pump switch, and the buoyancy detection element, the display, the trigger module, the automatic water pump switch and the water pump are connected in sequence.

[0016] Preferably, the buoyancy detection element is a strain gauge.

[0017] The present invention also provides a construction method of an anti-pullout restraint device of a tower crane foundation, comprising the following steps:

[0018] Step 1: When constructing the basement top plate, pre-embed the bottom of the U-shaped steel bar in the basement top plate;

[0019] Step 2: Install a "tic-tac-toe" restraint frame on the top plate of the basement, and fix the "tic-tac-toe" restraint frame to the U-shaped steel bar by pressing the top angle steel;

[0020] Step 3: Fix and connect the "tic-tac-toe" restraint frame to the standard section of the steel tower crane;

[0021] Step 4: installing a buoyancy detection element on the "tic-tac-toe" restraint frame, wherein the buoyancy detection element is connected to a water pump signal;

[0022] Step 5: Lay a load-bearing steel beam on the "tic-tac-toe" restraint frame, and install a lifting hydraulic jack and a lowering hydraulic jack under the load-bearing steel beam respectively.

[0023] Preferably, the water pump is controlled to adjust the water level according to the buoyancy detected by the buoyancy detection element.

[0024] Preferably, the raising hydraulic jack or the lowering hydraulic jack is opened according to the overall rising or sinking control of the tower crane.

[0025] Compared with the prior art, the anti-pulling restraint device for the tower crane foundation and the construction method thereof provided by the present invention have the following advantages:

[0026] 1. The present invention can ensure that the pull-out bearing capacity of the tower crane foundation meets the requirements under limited construction conditions, thereby ensuring construction safety;

[0027] 2. The present invention realizes automatic dewatering of foundation pit through the pumping system, and has strong adaptability to complex coastal environments; at the same time, it monitors the overall settlement of the basement and tower crane, and automatically adjusts the differential settlement through the jack system;

[0028] 3. The present invention is quick to install, does not occupy the main process, saves construction time, and is simple to construct and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an anti-pullout restraint device of a tower crane foundation in a specific embodiment of the present invention;

[0030] Figure 2 It is a top view of the anti-pullout restraint device of the tower crane foundation in a specific embodiment of the present invention;

[0031] Figure 3 It is a connection diagram of a "tic-tac-toe" restraint frame in a specific implementation manner of the present invention.

[0032] In the figure: 10-standard section of steel tower crane, 20-basement top plate, 30-"cross-shaped" restraint frame, 31-anchor U-shaped reinforcement, 32-L-shaped angle steel connector, 33-U-shaped reinforcement, 34-top angle steel, 35-wooden wedge, 41-buoyancy detection element, 42-display, 43-trigger module, 44-water pump automatic switch, 45-water pump, 51-load-bearing steel beam, 52-raising hydraulic jack, 53-lowering hydraulic jack. DETAILED DESCRIPTION

[0033] In order to describe the technical solution of the above invention in more detail, specific embodiments are listed below to demonstrate the technical effect; it should be emphasized that these embodiments are used to illustrate the present invention but are not limited to the scope of the present invention.

[0034] The anti-pulling restraint device of the tower crane foundation provided by the present invention is as follows: Figures 1 to 3 As shown, it includes a standard section of a steel tower crane 10, a basement top plate 20, a pumping system and a jack system, wherein:

[0035] The standard section 10 of the steel tower crane passes through the basement top plate 20 and is fixedly connected to the basement top plate 20;

[0036] The pumping system includes a buoyancy detection element 41 (such as a strain gauge) and a pump 45. The buoyancy detection element 41 is installed on the standard section 10 of the steel tower crane. The buoyancy detection element 41 is connected to the pump 45 by signal. During the operation of the tower crane, the pump 45 can be controlled according to the buoyancy detected by the buoyancy detection element 41, thereby adjusting the water level and then adjusting all the buoyancy of the tower crane foundation.

[0037] The jack system includes a load-bearing steel beam 51, a lifting hydraulic jack 52 and a lowering hydraulic jack 53. The load-bearing steel beam 51 is transversely fixed on the standard section 10 of the steel tower crane. The lifting hydraulic jack 52 and the lowering hydraulic jack 53 are respectively fixed under the load-bearing steel beam 51. The overall settlement of the basement and the tower crane can be monitored in real time, and the differential settlement can be automatically adjusted through the jack system.

[0038] On the one hand, the present invention realizes automatic dewatering of the foundation pit through the pumping system, and has strong adaptability to complex coastal environments; on the other hand, the overall settlement of the basement and the tower crane is monitored, and the differential settlement is automatically adjusted through the jack system, which can ensure that the pull-out bearing capacity of the tower crane foundation meets the requirements under limited construction conditions, ensuring construction safety. In addition, the present invention is quick to install, does not occupy the main process, saves construction time, is simple to construct, and has a low cost.

[0039] Preferably, please focus on Figure 1 The standard section 10 of the steel tower crane is assembled from transverse steel, vertical steel and oblique steel. In this embodiment, the size of the standard section 10 of the steel tower crane is 1.8m×1.8m×2.8m, and the standard section 10 of the steel tower crane can be spliced ​​up and down to form a complete tower crane structure.

[0040] Preferably, please focus on Figure 1 and Figure 2 The standard section 10 of the steel tower crane is fixedly connected to the basement top plate 20 through a "tic-tac-toe" restraint frame 30. Please refer to Figure 3The "well-shaped" constraint frame 30 is fixedly connected to the basement top plate 20 through the anchoring U-shaped rib 31, and the "well-shaped" constraint frame 30 is fixedly connected to the standard section of the steel tower crane 10 through the L-shaped angle steel connector 32. Specifically, one side of the L-shaped angle steel connector 32 is welded to the standard section of the steel tower crane 10, and the other side is connected to the "well-shaped" constraint frame 30 by bolts; a wooden wedge 35 is inserted between the "well-shaped" constraint frame 30 and the anchoring U-shaped rib 31. Specifically, the "well-shaped" restraint frame 30 includes two layers of I-beams stacked up and down, and the upper and lower layers of I-beams are perpendicular to each other in the horizontal direction. The construction is simple and the cost is low. During installation, the upper and lower layers of I-beams are fitted with the vertical steel sections of the standard section of the steel tower crane 10. The upper and lower layers of I-beams are both made of 14# I-beams, and the two layers of I-beams are fixedly connected by bolts at a distance of 800mm from the end, thereby realizing a firm connection between the standard section of the steel tower crane 10 and the basement top plate 20.

[0041] Preferably, please focus on Figure 3 The anchoring U-shaped rib 31 includes a U-shaped steel bar 33 and a top angle steel 34. In this embodiment, the U-shaped steel bar 33 adopts a Φ18 smooth round U-shaped steel bar, and the size of the top angle steel 34 is 63mm×6mm. Specifically, the top angle steel 34 is arranged above each I-beam of the "well-shaped" constraint frame 30, and the bottom of the U-shaped steel bar 33 is embedded in the basement roof 20. The top of the U-shaped steel bar 33 passes through the I-beam and is fixedly connected to the top angle steel 34. The wooden wedge 35 is inserted in the gap between the U-shaped steel bar 33 and the I-beam of the "well-shaped" constraint frame 30 to ensure that the "well-shaped" constraint frame 30 is firmly connected to the basement roof 20. At the same time, the U-shaped steel bar 33 is easy to assemble and disassemble and can be reused.

[0042] Preferably, please continue to refer to Figure 1 and Figure 2 The pumping system also includes a display 42, a trigger module 43 and a water pump automatic switch 44. The buoyancy detection element 41, the display 42, the trigger module 43, the water pump automatic switch 44 and the water pump 45 are connected in sequence, for example, by connecting lines. The buoyancy detection element 41 is used to detect the buoyancy value. In this embodiment, a strain gauge is used. The display 42 is used to display the buoyancy value. When the buoyancy value reaches 0.8F (where F is the designed anti-buoyancy), the trigger module 43 outputs current to the water pump automatic switch 44 to control the water pump 45 to extract water from the foundation pit, thereby achieving the effect of adjusting the buoyancy.

[0043] Please continue to refer to Figures 1 to 3 The present invention also provides a construction method of an anti-pullout restraint device for a tower crane foundation, comprising the following steps:

[0044] Step 1: When constructing the basement top plate 20, the bottom of the U-shaped steel bar 33 is pre-buried in the basement top plate 20. Specifically, when tying the steel bars of the basement top plate 20, Φ18 round U-shaped steel bars are tied at the same time, and then the concrete of the basement top plate 20 is poured and cured for 7 days;

[0045] Step 2: Install a “tic-tac-toe” restraint frame 30 on the basement ceiling 20 , and fix the “tic-tac-toe” restraint frame 30 to the U-shaped steel bar 33 via a top pressing angle steel 34 .

[0046] Step 3: Fix the "tic-tac-toe" restraint frame 30 to the standard section 10 of the steel tower crane. Steps 2 and 3 can be specifically broken down into the following steps: First, install the two I-beams on the lower layer, adjust each I-beam to be close to one side of the standard section 10 of the steel tower crane, and then install the corresponding top angle steel 34 to connect and fasten the two I-beams on the lower layer to the basement top plate 20, and then use the L-shaped angle steel connector 32 to connect the two I-beams on the lower layer to the standard section 10 of the steel tower crane. Specifically, there are four L-shaped angle steel connectors 32 on each lower I-beam. Please pay special attention to Figure 3 When the L-shaped angle steel connector 32 is connected to the standard section 10 of the steel tower crane, welding is used; when the L-shaped angle steel connector 32 is connected to the two I-beams of the lower layer, two bolts are used. Finally, the gap between the U-shaped steel bar 33 and the I-beam of the lower layer is plugged with a wooden wedge 35. Similarly, the two I-beams of the upper layer are installed according to the same steps as above.

[0047] Step 4: Install a buoyancy detection element 41 on the "tic-tac-toe" restraint frame 30, and the buoyancy detection element 41 is connected to a water pump 45 by signal. Preferably, the water pump 45 is controlled according to the buoyancy detected by the buoyancy detection element 41 to adjust the water level. Specifically, the buoyancy detection element 41, the display 42, the trigger module 43, the water pump automatic switch 44 and the water pump 45 are connected in sequence with wires to form a water pumping system;

[0048] Step 5: Lay a load-bearing steel beam 51 on the "tic-tac-toe" restraint frame 30, and install a lifting hydraulic jack 52 and a lowering hydraulic jack 53 respectively under the load-bearing steel beam 51. Preferably, the lifting hydraulic jack 52 or the lowering hydraulic jack 53 is opened according to the overall floating or sinking control of the tower crane to form a jack system.

[0049] The pull-out bearing capacity of the tower crane foundation manufactured by the method of the present invention can meet the requirements of coastal tidal flat areas, ensuring construction safety.

[0050] In summary, the present invention provides an anti-pulling restraint device for a tower crane foundation and a construction method thereof, wherein the device comprises a standard section 10 of a steel tower crane, a basement top plate 20, a pumping system and a jack system, wherein the standard section 10 of the steel tower crane passes through the basement top plate 20 and is fixedly connected to the basement top plate 20; the pumping system comprises a buoyancy detection element 41 and a pumping pump 45, wherein the buoyancy detection element 41 is installed on the standard section 10 of the steel tower crane, and the buoyancy detection element 41 is connected to the pumping pump 45 by signal; the jack system comprises a load-bearing steel beam 51, a lifting hydraulic jack 52 and a lowering hydraulic jack 53, wherein the load-bearing steel beam 51 is transversely fixed on the standard section 10 of the steel tower crane, and the lifting hydraulic jack 52 and the lowering hydraulic jack 53 are respectively fixed below the load-bearing steel beam 51. The present invention can ensure that the anti-pulling bearing capacity of the tower crane foundation meets the requirements, ensure construction safety, and ensure the smooth operation of the tower crane.

[0051] Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A construction method for an anti-pulling restraint device of a tower crane foundation, characterized in that: The pull-out restraint device includes a standard section of a steel tower crane, a basement top plate, a pumping system and a jack system, wherein: The standard section of the steel tower crane passes through the basement top plate and is fixedly connected to the basement top plate; The pumping system includes a buoyancy detection element and a pumping pump, wherein the buoyancy detection element is installed on the standard section of the steel tower crane, and the buoyancy detection element is connected to the pumping pump signal; The jack system includes a load-bearing steel beam, a lifting hydraulic jack and a lowering hydraulic jack. The load-bearing steel beam is transversely fixed on the standard section of the steel tower crane. The lifting hydraulic jack and the lowering hydraulic jack are respectively fixed below the load-bearing steel beam. The standard section of the steel tower crane is fixedly connected to the basement top plate via a "well-shaped" constraint frame, the "well-shaped" constraint frame is fixedly connected to the basement top plate via anchoring U-shaped bars, and the "well-shaped" constraint frame is fixedly connected to the standard section of the steel tower crane via an L-shaped angle steel connector; A wooden wedge is inserted between the "tic-tac-toe" restraint frame and the anchoring U-shaped reinforcement; The anchoring U-shaped bar includes a U-shaped steel bar and a top angle steel, wherein the top angle steel is arranged above the "well-shaped" constraint frame, the bottom of the U-shaped steel bar is pre-buried in the basement top plate, the top of the U-shaped steel bar passes through the "well-shaped" constraint frame and is fixedly connected to the top angle steel, and the wooden wedge is arranged in the gap between the U-shaped steel bar and the "well-shaped" constraint frame; The construction method comprises the following steps: Step 1: When constructing the basement top plate, pre-embed the bottom of the U-shaped steel bar in the basement top plate; Step 2: Install a "well-shaped" restraint frame on the top plate of the basement, and fix the "well-shaped" restraint frame to the U-shaped steel bar through a top pressing angle steel; Step 3: The "tic-tac-toe" restraint frame is fixedly connected to the standard section of the steel tower crane; Step 4: Install a buoyancy detection element on the "tic-tac-toe" restraint frame, and the buoyancy detection element is connected to a water pump signal; Step 5: Lay a load-bearing steel beam on the "tic-tac-toe" restraint frame, and install a lifting hydraulic jack and a lowering hydraulic jack under the load-bearing steel beam respectively.

2. The construction method according to claim 1, characterized in that: The standard section of the steel tower crane is assembled from transverse steel, vertical steel and oblique steel.

3. The construction method according to claim 1, characterized in that: The water pumping system also includes a display, a trigger module and a water pump automatic switch, and the buoyancy detection element, the display, the trigger module, the water pump automatic switch and the water pump are connected in sequence.

4. The construction method according to claim 1 or 3, characterized in that: The buoyancy detection element adopts a strain gauge.

5. The construction method according to claim 1, characterized in that: The water pump is controlled to adjust the water level according to the buoyancy detected by the buoyancy detection element.

6. The construction method according to claim 1, characterized in that: The raising hydraulic jack or the lowering hydraulic jack is opened according to the overall rising or sinking control of the tower crane.

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