Fabricated steel latticed column structure

Abstract

The utility model discloses an assembly type steel latticed column structure in the technical field of foundation pit excavation support, which comprises a drill hole, a reinforcement cage is arranged in the drill hole, a plurality of angle steel vertical supports are connected in the reinforcement cage, a steel plate connecting batten plate is welded between the left and right adjacent angle steel vertical supports, and a structure bottom plate is mounted at the top of the drill hole. The tops of the angle steel vertical supports extend out of the drill hole and are provided with turnover parts, the turnover parts of the upper and lower sections of adjacent angle steel vertical supports are connected through a plurality of connecting bolts, and a plurality of reinforced concrete transverse supports are arranged on the side, away from the drill hole, of the structural bottom plate at intervals. According to the utility model, the plurality of connecting bolts are connected between the upper and lower adjacent turnover parts, so that the upper and lower adjacent angle steel vertical supports can be connected, the steel latticed column can be assembled on site to have the column length meeting the design and site construction requirements, and the bolt connection is adopted as the connecting mode, so that the site assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of foundation pit excavation support especially to a kind of assembled steel latticed column structure. BACKGROUND

[0002] At present, in the process of deep foundation pit engineering design and construction, steel pipe or reinforced concrete temporary support form is usually used, and the temporary support mainly bears axial load and resists the deformation of foundation pit side wall. In order to prevent the temporary support from falling under the action of dead load or other vertical temporary load, a steel latticed column needs to be set to bear vertical load. In foundation pit support engineering, the most commonly used latticed column is a square-section column made of profile steel by on-site welding, and the lower part is deeply inserted into a bored pile to a certain depth and welded with the reinforcement of the bored pile.

[0003] There are two common ways to install the steel latticed column. One is to first hoist the reinforcement cage, temporarily fix the end of the reinforcement cage at the hole opening position, then hoist the on-site processed steel latticed column, weld and fix the steel latticed column and the reinforcement cage at the hole opening position after the lower part of the steel latticed column is deeply inserted into the reinforcement cage to a specified depth, remove the temporary fixing device of the reinforcement cage, lower the reinforcement cage and the steel latticed column to the specified depth, and then pour concrete to the specified elevation. The other is to first weld the reinforcement cage and the steel latticed column at the specified position on site, then uniformly place them into the hole using lifting equipment, and then pour concrete to the specified elevation.

[0004] Both of the above-mentioned ways have some shortcomings. In the first way, the reinforcement cage and the steel latticed column need to be welded on site at the hole opening position, and the welding quality, precision and safety environment are poor. During the welding construction period, the lifting equipment needs to work continuously. In the second way, the reinforcement cage and the steel latticed column are hoisted together, the lifting load is the total load of the reinforcement cage and the steel latticed column, the lifting height needs to exceed the total length of the reinforcement cage and the steel latticed column, the required lifting equipment tonnage is large, and the required site operation space is large. The steel latticed column in the above-mentioned two ways needs to be processed on site using profile steel, the construction preparation period is long, and after the completion of the main structure of the foundation pit, it needs to be segmented, cut off and disassembled, and cannot be reused. Based on this, we propose an assembled steel latticed column structure. UTILITY MODEL CONTENTS

[0005] In order to improve the above-mentioned problems of the existing steel latticed column that needs to be processed on site using profile steel, the construction preparation period is long, and after the completion of the main structure of the foundation pit, it needs to be segmented, cut off and disassembled, and cannot be reused, the utility model provides an assembled steel latticed column structure.

[0006] The utility model provides an assembled steel latticed column structure, which adopts the following technical scheme:

[0007] The utility model provides a kind of fabricated steel lattice column structure, including drilling, the inside of the drilling is provided with reinforcement cage, the inside of the reinforcement cage is connected with several angle steel vertical supports, steel plate connecting patch is welded between left and right two adjacent angle steel vertical supports, the top of the drilling is equipped with structure bottom plate, the top of several angle steel vertical supports is projected drilling and is provided with folding part, the folding part between two adjacent angle steel vertical supports is connected by several connecting bolts, the side of the structure bottom plate away from drilling is interval provided with several reinforced concrete cross bracing.

[0008] By adopting the above technical scheme, by setting the folding part at the end of the angle steel vertical support, and connecting the adjacent folding parts by several connecting bolts, the adjacent angle steel vertical supports can be connected, and the steel lattice column can be assembled on site to meet the design and on-site construction requirements, the connection mode adopts bolt connection, which improves the on-site assembly efficiency, and the steel lattice column can be removed without damage after the completion of the main structure of the foundation pit, improving the recycling rate.

[0009] Optionally, the number of angle steel vertical supports is four, the four angle steel vertical supports are symmetrically distributed about the center of the reinforcement cage, and the four angle steel vertical supports and the steel plate connecting patch form a square structure.

[0010] By adopting the above technical scheme, the four angle steel vertical supports are combined into a square-section column for bearing vertical load and preventing the reinforced concrete cross bracing from falling under the action of dead load or other vertical temporary load.

[0011] Optionally, the steel plate connecting patch is located on the outer side of the angle steel vertical support, and the steel plate connecting patch is arranged at equal intervals along the vertical direction of the angle steel vertical support.

[0012] By adopting the above technical scheme, the several angle steel vertical supports are more firmly connected through the steel plate connecting patch, and the steel structure column combined by the several angle steel vertical supports has higher strength.

[0013] Optionally, the included angle between the end of the angle steel vertical support and the folding part is 90°.

[0014] By adopting the above technical scheme, the adjacent two sections of angle steel vertical supports are more closely connected.

[0015] Optionally, bolt holes matched with the connecting bolts are formed in the folding part, and the bolt holes in the adjacent two folding parts are one-to-one correspondingly arranged.

[0016] By adopting the above technical scheme, the axes of the two adjacent sections of steel lattice column are ensured to be consistent.

[0017] Optionally, the outer wall of the connecting bolt is coated with a paint layer.

[0018] By adopting the technical scheme, the connecting bolt has certain corrosion resistance, rusting of the connecting bolt exposed to the outside for a long time is avoided, and the service life of the connecting bolt is prolonged.

[0019] To sum up, the utility model discloses the following at least one beneficial effect:

[0020] By arranging the folded part at the end of the angle steel vertical support and connecting a plurality of connecting bolts between the adjacent folded parts, the adjacent angle steel vertical supports can be connected, and the steel lattice column can be assembled on site to the column length meeting the design and on-site construction needs, the bolt connection is used for the connection mode, the on-site assembly efficiency is improved, and when the main structure of the foundation pit is completed, the steel lattice column can be removed without damage, and the reusability is improved.

[0021] After the first steel lattice column and the steel reinforcement cage of the cast-in-place pile are welded, the steel reinforcement cage is hoisted synchronously, the whole is lowered to the position of the drilling hole, the steel reinforcement cage is fixed, then the second steel lattice column section is installed, the tonnage requirement of the hoisting equipment is low by reasonably distributing the installation sequence of the steel lattice column, the hoisting height can also be reduced, and the economy is better.

[0022] The steel structure column is welded by a plurality of angle steel vertical supports and steel plate connecting plates, the steel lattice column is prefabricated in the factory, the operation environment is good, and the quality can be better guaranteed than on-site welding. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0024] Figure 1 It is the overall structure schematic diagram of the utility model;

[0025] Figure 2 It is the overhead structure schematic diagram of the steel lattice column section connecting part of the utility model.

[0026] In the drawing: 1, drilling hole; 2, steel reinforcement cage; 3, structure bottom plate; 4, reinforced concrete horizontal support; 5, angle steel vertical support; 6, steel plate connecting plate; 7, connecting bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawingsFigures 1-2 The utility model makes further detailed description.

[0028] Please refer to the drawing of the specification Figure 1 And Figure 2 The utility model provides an embodiment: a fabricated steel latticed column structure, the inside of drilling 1 is provided with reinforced cage 2, the inside of reinforced cage 2 is connected with a plurality of angle steel vertical support 5, and the welding of steel plate connecting patch plate 6 is formed between the left and right two adjacent angle steel vertical support 5, and the steel plate connecting patch plate 6 is located the outside of angle steel vertical support 5, and the steel plate connecting patch plate 6 is arranged along the vertical direction of angle steel vertical support 5 equal interval. So that a plurality of angle steel vertical support 5 is more firm when connecting through steel plate connecting patch plate 6, and then the strength of the steel structure column combined by a plurality of angle steel vertical support 5 is higher.

[0029] Please refer to the drawing of the specification Figure 1 The top of drilling 1 is installed with structural bottom plate 3, and the top of a plurality of angle steel vertical support 5 is out of drilling 1 and is provided with a folding part, and the included angle between the end of angle steel vertical support 5 and folding part is 90 °. So as to guarantee that the upper and lower adjacent two sections of angle steel vertical support 5 are connected more closely.

[0030] Please refer to the drawing of the specification Figure 1 And Figure 2 The folding part between the upper and lower two sections of adjacent angle steel vertical support 5 is connected through a plurality of connecting bolts 7, the folding part is provided with bolt hole matched with connecting bolt 7, and the bolt hole on the adjacent two folding parts is set one by one. Ensure that the axis of the upper and lower two sections of steel latticed column section is consistent. The outer wall of connecting bolt 7 is coated with a paint layer. So that connecting bolt 7 has certain corrosion resistance, and the rusting of connecting bolt 7 exposed to the outside for a long time is avoided as far as possible, and then the service life of connecting bolt 7 is prolonged.

[0031] Please refer to the drawing of the specification Figure 1 And Figure 2 The side of structural bottom plate 3 away from drilling 1 is provided with a plurality of reinforced concrete cross bracing 4 at intervals, the number of angle steel vertical support 5 is four, the four angle steel vertical support 5 is symmetrically distributed about the center of reinforced cage 2, and the four angle steel vertical support 5 and steel plate connecting patch plate 6 form a square structure. Four angle steel vertical support 5 is combined into a square section column, which is used for bearing vertical load and preventing reinforced concrete cross bracing 4 from falling under the action of dead load or other vertical temporary load.

[0032] Working principle: through four angle steel vertical support 5 and steel plate connecting board 6 welded combination into square section steel structure column, structure bottom plate 3 below and steel reinforcement cage 2 welded part is first section steel lattice column section, this section steel lattice column section is usually about 3.5m~4.0m, the specific length is determined according to the actual site engineering, after the first section steel lattice column is welded with steel reinforcement cage 2, it is hoisted synchronously with steel reinforcement cage 2, the whole is placed to the hole opening position of drilling 1, then the steel reinforcement cage 2 is fixed, then the second steel lattice column section is installed, the end of four angle steel vertical support 5 is provided with a folding part, the upper and lower two adjacent folding parts are connected through a plurality of connecting bolts 7, so that the first and second steel column sections are quickly connected.

[0033] According to the design drawing, the height of the first steel reinforced concrete cross support 4 at the bottom is determined, the third, fourth to the nth section steel lattice column section is installed, the adjacent steel lattice column sections are also quickly connected through connecting bolts 7, a section steel lattice column section is installed at the position of the first steel reinforced concrete cross support 4 at the bottom, the length of the section steel lattice column section is consistent with the height of the steel reinforced concrete cross support 4, and the next section steel lattice column section is installed at the position of the next steel reinforced concrete cross support 4 in the order.

[0034] After installation is completed, the concrete is poured, the steel lattice column section below the top surface of the structure bottom plate 3 is permanently left in the structure, and the steel reinforced concrete section in the steel reinforced concrete cross support 4 is left in the structure, when the permanent structure is completed in sections, the steel reinforced concrete cross support 4 is removed, and whether recycling is needed is determined according to the construction cost.

[0035] When the steel lattice column needs to be removed, the connecting bolt 7 between the steel lattice column section and the lower end of the first steel reinforced concrete cross support 4 at the top is removed first, then the first steel reinforced concrete cross support 4 at the top is removed, and then the first section steel lattice column section at the top is removed, and the steel reinforced concrete cross support 4 and the steel lattice column section are removed in this cycle.

[0036] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so: equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A fabricated steel lattice column structure comprising a drilled hole (1), characterized in that: The inside of the drill hole (1) is provided with a reinforcement cage (2), the inside of the reinforcement cage (2) is connected with a plurality of angle steel vertical supports (5), a steel plate connecting plate (6) is welded between every two adjacent angle steel vertical supports (5), a structure bottom plate (3) is installed at the top of the drill hole (1), the top of each angle steel vertical support (5) extends out of the drill hole (1) and is provided with a folded part, the folded parts between two adjacent angle steel vertical supports (5) are connected through a plurality of connecting bolts (7), and a plurality of reinforced concrete horizontal supports (4) are arranged at intervals on the side, away from the drill hole (1), of the structure bottom plate (3).

2. The fabricated steel latticed column structure of claim 1, wherein: The number of the angle steel vertical supports (5) is four, the four angle steel vertical supports (5) are symmetrically distributed in pairs about the center of the reinforcement cage (2), and the four angle steel vertical supports (5) and the steel plate connecting plate (6) form a square structure.

3. The prefabricated steel latticed column structure according to claim 1, characterized in that: The steel plate connecting plate (6) is located outside the angle steel vertical support (5), and the steel plate connecting plate (6) is arranged at equal intervals along the vertical direction of the angle steel vertical support (5).

4. The fabricated steel lattice column structure of claim 1, wherein: The included angle between the end part and the folded part of the angle steel vertical support (5) is 90°.

5. The prefabricated steel latticed column structure according to claim 1, characterized in that: A bolt hole matched with the connecting bolt (7) is formed in the folded part, and the bolt holes on the adjacent two folded parts are arranged in one-to-one correspondence.

6. The prefabricated steel latticed column structure according to claim 1, characterized in that: The outer wall of the connecting bolt (7) is coated with a paint layer.

Images