Deep foundation pit lattice type steel platform tower crane foundation

Abstract

The utility model discloses a deep foundation pit lattice type steel platform tower crane foundation. The deep foundation pit lattice type steel platform tower crane foundation comprises a cast-in-place concrete pile, four lattice columns, a mounting sleeve, an inclined strut and a baffle, the lower ends of the latticed columns are pre-buried in the cast-in-place concrete piles, and the upper ends of the latticed columns are provided with steel platforms capable of being connected with tower columns of a tower crane; the mounting sleeve sleeves the latticed column and is welded with the latticed column, the thickness of the baffle is less than or equal to 10mm, and a mounting surface connected with the inclined strut or the baffle is arranged on the outer surface of the mounting sleeve; according to the deep foundation pit lattice type steel platform tower crane foundation provided by the utility model, soil is prevented from being attached to a latticed column at an inclined strut mounting position, and inclined strut mounting is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of tower crane foundations, in particular to a deep foundation pit lattice type steel platform tower crane foundation. Background Art

[0002] The existing deep foundation pit lattice steel platform tower crane foundation includes concrete bored piles, lattice columns and steel platforms. During construction, holes are first drilled in the ground, the lower end of the lattice column is welded to the upper end of the steel cage, and the steel cage and the lattice column are placed in the drilled hole. Concrete is poured into the drilled hole, and the lower end of the lattice column is pre-embedded in the concrete. After the concrete solidifies, it forms a concrete bored pile with the steel cage. After the steel platform is installed on the upper end of the lattice column, the tower crane is installed on the upper side of the steel platform, and then the deep foundation pit is excavated in layers. The upper end of the lattice column is slowly exposed in the foundation pit. During this period, diagonal braces are welded between the lattice columns for each excavation to increase the stability of the lattice column.

[0003] In the existing lattice column diagonal brace welding and installation, since the lattice column is initially in a drilled hole, after the earth is excavated, mud adheres to the surface of the lattice column. Before welding, the surface of the lattice column needs to be cleaned, which is troublesome. If it is not cleaned thoroughly, the welding quality is affected, and then the safety of the tower crane is affected. Utility Model Content

[0004] In order to solve the disadvantage that the existing deep foundation pit lattice steel platform tower crane foundation is inconvenient to install diagonal braces, the utility model proposes a deep foundation pit lattice steel platform tower crane foundation, which prevents the lattice columns from adhering to soil at the diagonal brace installation position and facilitates the installation of the diagonal braces.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A deep foundation pit lattice steel platform tower crane foundation, comprising: concrete cast-in-place piles, four lattice columns, a mounting sleeve, diagonal braces and baffles; the lower end of the lattice column is pre-buried in the concrete cast-in-place pile, and the upper end of the lattice column is provided with a steel platform that can be connected to the tower column of the tower crane; the mounting sleeve is sleeved on the lattice column and welded to the lattice column, the thickness of the baffle is less than or equal to ten millimeters, and the outer surface of the mounting sleeve is provided with a mounting surface connected to the diagonal brace or the baffle;

[0007] The lattice column includes a first state and a second state. When the lattice column is in the first state, the baffle is tightly attached to the mounting surface of the mounting sleeve; when the lattice column is in the second state, both ends of the diagonal brace are respectively installed on the mounting surfaces of the mounting sleeves of two adjacent lattice columns.

[0008] Through the above arrangement, firstly, the baffle is thinner in thickness, which has little effect on the size of the lattice column, and the hole is not easy to collapse when the lattice column is installed into the drilled hole; secondly, the baffle prevents soil from adhering to the installation surface, making it convenient to install the diagonal brace.

[0009] Furthermore, a first screw hole is provided on the mounting sleeve, a second screw hole is provided on the baffle, and third screw holes are provided at both ends of the diagonal brace. The tower crane foundation also includes bolts. When the lattice column is in the first state, the bolts pass through the first screw hole and the second screw hole to press the baffle against the mounting surface. When the lattice column is in the second state, the bolts pass through the first screw hole and the third screw hole to lock the end of the diagonal brace on the mounting surface of the mounting sleeve.

[0010] Through the above arrangement, the baffle can be mounted on the mounting surface by means of bolts, and the end of the diagonal brace can be mounted on the mounting surface by means of bolts.

[0011] Furthermore, a support block is fixedly connected to the mounting surface, and a support surface is provided on the support block. When the lattice column is in a first state, the edge of the baffle is attached to the support surface of the support block. When the lattice column is in a second state, the outer end of the diagonal brace is in contact with the support surface of the support block.

[0012] Through the above arrangement, firstly, in the first state, the baffle sticks to the supporting surface of the supporting block to prevent the adhesion of mud to the supporting surface; secondly, the supporting block contacts the outer end of the diagonal brace to further improve the stability of the diagonal brace.

[0013] Furthermore, the diagonal brace is made of angle steel, the third screw hole is arranged on the web of the angle steel, and the protrusion height of the support block on the installation surface, the thickness of the web of the angle steel, and the thickness of the baffle are all equal.

[0014] Furthermore, the depth of the lattice column embedded in the concrete pile is greater than or equal to four meters.

[0015] Through the above arrangement, the pull-out resistance of the lattice column is increased, thereby increasing the stability of the tower crane.

[0016] Furthermore, the steel platform is horizontally welded to the upper end of the lattice column, the edge of the steel platform extends outside the lattice column, and reinforcing ribs are welded between the edge of the steel platform and the lattice column; a through hole is provided on the steel platform, a stud vertically passes through the through hole, the lower end of the stud is welded to the inner wall of the lattice column, and the upper end of the stud is used to connect with the tower column of the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a tower crane foundation of an embodiment.

[0018] Figure 2 for Figure 1 Enlarged view of point A.

[0019] Figure 3 It is a schematic diagram of a lattice column of an embodiment pre-buried behind a concrete cast-in-place pile.

[0020] Figure 4 Schematic diagram of the baffle being installed on the mounting sleeve.

[0021] Figure 5Schematic diagram of the diagonal brace installed on the mounting sleeve. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0023] like Figures 1 to 5 As shown, a deep foundation pit lattice steel platform tower crane foundation comprises: concrete cast-in-place piles 3, four lattice columns 4, mounting sleeves 5, diagonal braces 6 and baffles 7; the lower ends of the lattice columns 4 are pre-buried in the concrete cast-in-place piles 3, and the upper ends of the lattice columns 4 are provided with steel platforms 8 that can be connected to the tower columns of the tower crane; the mounting sleeves 5 are sleeved on the lattice columns 4 and welded to the lattice columns 4, the thickness of the baffles 7 is less than or equal to ten millimeters, and the outer surface of the mounting sleeves 5 is provided with mounting surfaces 52 that are connected to the diagonal braces 6 or the baffles 7;

[0024] The lattice column 4 includes a first state and a second state. When the lattice column 4 is in the first state, the baffle 7 is tightly attached to the mounting surface 52 of the mounting sleeve 5; when the lattice column 4 is in the second state, both ends of the diagonal brace 6 are respectively installed on the mounting surfaces 52 of the mounting sleeves 5 of two adjacent lattice columns 4.

[0025] Through the above arrangement, firstly, the baffle 7 has a smaller thickness, which has a small effect on the size of the lattice column 4, and the hole is not easy to collapse when the lattice column 4 is installed into the drilled hole; secondly, the baffle 7 prevents the attachment of soil to the installation surface 52, making it convenient to install the diagonal brace 6.

[0026] During the construction of the tower crane foundation of the present application, the lattice column 4 is in the first state, the baffle 7 is installed on the mounting surface 52 of the mounting sleeve, a hole is drilled on the ground, the inner diameter of the drilled hole is larger than the size of the lattice column 4 and the steel cage, and after the steel cage is welded at the lower end of the lattice column 4, the steel cage and the lattice column 4 are put into the drilled hole together. The thickness of the baffle 7 is relatively small. During the process of lowering the lattice column 4, the baffle 7 basically does not contact the hole wall to prevent the hole from collapsing. Concrete is poured into the hole, and the lower end of the lattice column 4 is immersed in the concrete. After the concrete solidifies, it forms a concrete cast-in-place pile 3 with the steel cage, as shown in FIG. Figure 3 As shown, at this time, the lattice column 4 is basically in the drilled hole as a whole, and the tower column of the tower crane is installed on the upper end of the lattice column 4 through the steel platform. The foundation pit is excavated layer by layer. Each time a layer of soil is excavated, a section of the upper end of the lattice column 4 is exposed, and the baffle 7 of the exposed part of the lattice column 4 is removed to expose the installation surface 52. At this time, there is no soil attached to the installation surface 52, and the end of the diagonal brace 6 can be well fitted and installed on the installation surface 52. There is basically no gap between the end of the diagonal brace 6 and the installation surface 52, which improves the stability of the diagonal brace 6. Figure 1 shown.

[0027] As an implementation method, a first screw hole 51 is provided on the mounting sleeve 5, a second screw hole 71 is provided on the baffle 7, and third screw holes 61 are provided at both ends of the diagonal brace 6. The tower crane foundation also includes a bolt 10. When the lattice column 4 is in the first state, the bolt passes through the first screw hole 51 and the second screw hole 71 to press the baffle 7 against the mounting surface 52. When the lattice column 4 is in the second state, the bolt passes through the first screw hole 51 and the third screw hole 61 to lock the end of the diagonal brace 6 on the mounting surface 52 of the mounting sleeve 5.

[0028] Through the above arrangement, the baffle 7 can be mounted on the mounting surface 52 by bolts, and the end of the diagonal brace 6 can be mounted on the mounting surface 52 by bolts.

[0029] As an implementation method, a support block 9 is fixedly connected to the mounting surface 52, and a support surface is provided on the support block 9. When the lattice column 4 is in the first state, the edge of the baffle 7 is attached to the support surface of the support block 9. When the lattice column 4 is in the second state, the outer end of the diagonal brace 6 is in contact with the support surface of the support block 9.

[0030] Through the above arrangement, firstly, in the first state, the baffle 7 sticks to the supporting surface of the supporting block 9 to prevent the adhesion of mud to the supporting surface; secondly, the supporting block 9 contacts the outer end of the diagonal brace 6 to further enhance the stability of the diagonal brace 6.

[0031] like Figure 4 , when the edge of the baffle 7 is attached to the support surface of the support block 9, soil is prevented from adhering to the support surface; after the baffle 7 is removed from the mounting sleeve 5, there is no soil adhering to the support surface and the mounting surface 52, and after the end of the diagonal support 6 is placed on the mounting sleeve 5, as shown Figure 5 The diagonal brace 6 contacts the supporting surface and the mounting surface 52. There is basically no gap between the diagonal brace 6 and the supporting surface, and between the diagonal brace 6 and the mounting surface 52. When the diagonal brace 6 is subjected to axial force, the supporting surface supports the diagonal brace 6, reduces the force on the bolt, and prevents the bolt from being sheared off.

[0032] As an implementation method, the diagonal brace 6 is made of angle steel, the third screw hole 61 is set on the web 62 of the angle steel, and the protrusion height of the support block 9 on the installation surface 52, the thickness of the web 62 of the angle steel, and the thickness of the baffle 7 are all equal.

[0033] When the lattice column 4 of the present application is in the first state, Figure 4 The outer side of the baffle plate 7 is substantially flush with the outer side of the support block 9 to prevent the hole from collapsing when the lattice column 4 is lowered. Angle steel can be purchased from the market, which includes the above-mentioned web and wing plate 63, such as Figure 5 When the lattice column 4 is in the second state, the supporting surface basically contacts the end surface of the web 62 of the entire angle steel, so that the contact surface is as large as possible, the supporting effect of the supporting block 9 is improved, and the wing plate 63 faces the outside of the lattice column.

[0034] As an implementation method, the lattice column 4 is pre-buried in the concrete pile 3 to a depth greater than or equal to four meters.

[0035] Through the above arrangement, the pull-out resistance of the lattice column 4 is increased, thereby increasing the stability of the tower crane.

[0036] As an implementation method, a steel platform is horizontally welded to the upper end of the lattice column, the edge of the steel platform extends outside the lattice column, and a reinforcing rib 11 is welded between the edge of the steel platform and the lattice column; a through hole is provided on the steel platform, and a stud 12 vertically passes through the through hole, the lower end of the stud is welded to the inner wall of the lattice column, and the upper end of the stud is used to connect with the tower column 13 of the tower crane.

[0037] During the use phase of the tower crane foundation of the present application, the vertical load of the tower crane is transmitted downward to the concrete piles 3 through the steel platform and the lattice columns 4. After the studs are connected to the tower crane, they can withstand the tensile force to prevent the tower crane from moving upward, and the strengthening ribs increase the stability of the steel platform.

[0038] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A deep foundation pit lattice steel platform tower crane foundation, characterized in that: include: Concrete cast-in-place piles and four lattice columns, wherein the lower ends of the lattice columns are pre-buried in the concrete cast-in-place piles, and the upper ends of the lattice columns are provided with steel platforms that can be connected to the tower columns of the tower crane; A mounting sleeve, a diagonal brace and a baffle, wherein the mounting sleeve is mounted on the lattice column and welded to the lattice column, the thickness of the baffle is less than or equal to ten millimeters, and the outer surface of the mounting sleeve is provided with a mounting surface connected to the diagonal brace or the baffle; The tower crane foundation includes a first state and a second state. When the lattice column is in the first state, the baffle is tightly attached to the mounting surface of the mounting sleeve; when the lattice column is in the second state, both ends of the diagonal brace are respectively mounted on the mounting surfaces of the mounting sleeves of two adjacent lattice columns.

2. The deep foundation pit lattice steel platform tower crane foundation according to claim 1, characterized in that: The mounting sleeve is provided with a first screw hole, the baffle is provided with a second screw hole, and the two ends of the diagonal brace are provided with third screw holes. The tower crane foundation also includes bolts. When the lattice column is in the first state, the bolts pass through the first screw hole and the second screw hole to press the baffle against the mounting surface. When the lattice column is in the second state, the bolts pass through the first screw hole and the third screw hole to lock the end of the diagonal brace on the mounting surface of the mounting sleeve.

3. The deep foundation pit lattice steel platform tower crane foundation according to claim 2, characterized in that: A support block is fixedly connected to the mounting surface, and a support surface is provided on the support block. When the lattice column is in a first state, the edge of the baffle sticks to the support surface of the support block. When the lattice column is in a second state, the outer end of the diagonal brace contacts the support surface of the support block.

4. The deep foundation pit lattice steel platform tower crane foundation according to claim 3, characterized in that: The diagonal brace is made of angle steel, the third screw hole is arranged on the web of the angle steel, and the protrusion height of the support block on the installation surface, the web thickness of the angle steel, and the thickness of the baffle are all equal.

5. The deep foundation pit lattice steel platform tower crane foundation according to claim 1, characterized in that: The depth of the lattice columns embedded in the concrete piles is greater than or equal to four meters.

6. The deep foundation pit lattice steel platform tower crane foundation according to claim 1, characterized in that: The steel platform is horizontally welded to the upper end of the lattice column, the edge of the steel platform extends outside the lattice column, and a reinforcing rib is welded between the edge of the steel platform and the lattice column; a through hole is provided on the steel platform, a stud vertically passes through the through hole, the lower end of the stud is welded to the inner wall of the lattice column, and the upper end of the stud is used to be connected to the tower column of the tower crane.

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