Deck type servo steel support vertical bearing structure

Abstract

The utility model belongs to a deck type servo steel support vertical bearing structure in the field of foundation pit engineering. According to the technical scheme, every two transverse steel pipe supports form a group, a steel stand column is arranged between the two steel pipe supports, and a deck type system comprises arc-shaped steel plates and hanging steel bars; the arc-shaped steel plate sleeves the outer wall of the steel pipe support to form a hoop; the lower end of the hanging steel bar is fixed to the top of the hoop, and the top of the hanging steel bar is connected with the steel stand column; the steel pipe supports transfer self-weight to the steel stand columns through the hanging steel bars. The limiting system comprises limiting channel steel and a profile steel cross beam; the limiting channel steel is arranged on the periphery of the steel pipe support to frame the steel pipe support; and the other end of the profile steel cross beam is connected with the limiting channel steel. The supporting structure solves the problem of collision with an underground structure while meeting the requirement for supporting vertical stress, reduces the design and construction difficulty, and can be flexibly adjusted according to the actual situation on site.

Description

TECHNICAL FIELD

[0001] The utility model relates to the foundation pit engineering field adjacent to subway especially, and it is a kind of vertical bearing structure suitable for long distance servo steel support system. BACKGROUND

[0002] In recent years, steel support axial force servo system is widely applied in foundation pit engineering adjacent to subway, which ensures the operation safety of subway lifeline, and has significant social and economic benefits.In the prior art, long distance servo steel support system greatly increases the width of adjacent subway foundation pit partition, and the long distance servo steel support in transverse direction is connected with the vertical enclosure body through steel enclosing purlin, servo jack is arranged between the steel enclosing purlin and the steel support, and the deformation of the enclosure body is controlled by active loading and dynamic regulation and control of the jack.The technology improves the applicable scale based on the traditional servo steel support technology, and realizes the control target of once excavation and slight deformation of large-area foundation pit.But according to the implementation engineering experience, the technology still has the following problems:

[0003] 1.As the width of foundation pit is larger and the length of steel support is longer, steel column is arranged to insert cast-in-situ pile as vertical support, and the steel support is arranged in two groups, and the steel column is arranged between the two steel supports.The support beam and the inclined support are arranged below the steel support, and the self-weight of the steel support is transmitted to the column pile through the lower bearing component.Due to the high height of the support beam and the inclined support, collision may occur between the inclined support and the structure below the inclined support during the process of structure backfilling, so that the steel support is removed first, and the deformation of the enclosure body is adversely affected.

[0004] 2.The vertical spacing of foundation pit support adjacent to subway is smaller, and the steel support needs to consider the larger net distance reserved for the structure, so the arrangement of the steel support is difficult, and the deformation control of the enclosure body is affected.

[0005] 3.The enclosing purlin and the steel support of the conventional long distance axial force servo system adopt the lower bearing vertical bearing structure, and the construction difficulty of the lower bearing structure is larger, and the construction period is affected. INVENTION CONTENTS

[0006] To solve the above technical problems, the utility model provides an upper bearing vertical stress structure, which solves the collision problem between the steel support and the structure below the steel support, and the arrangement of the steel support is more flexible, and the lower bearing component is cancelled, so that the construction cost and construction difficulty are reduced, and the construction period is saved.

[0007] The technical scheme of the utility model is as follows:an upper bearing servo steel support vertical bearing structure, the steel pipe supports in transverse direction are arranged in two groups, the steel column is arranged between the two steel pipe supports, the upper bearing system comprises arc-shaped steel plate and hanging reinforcement;the arc-shaped steel plate is sleeved on the outer wall of the steel pipe support to form a sleeve hoop;the lower end of the hanging reinforcement is fixed to the top of the sleeve hoop, and the top of the hanging reinforcement is connected with the steel column;the self-weight of the steel pipe support is transmitted to the steel column through the hanging reinforcement.

[0008] Based on the above technical features: further comprising a limiting system, the limiting system comprises a limiting channel steel and a steel cross beam; the limiting channel steel is arranged around the steel pipe support to frame the steel pipe support; one end of the steel cross beam is connected with the steel column, and the other end is connected with the limiting channel steel.

[0009] Based on the above technical features: the upper bearing type system is located outside the limiting system.

[0010] Based on the above technical features: the arc-shaped steel plate is composed of two pieces, which are fixed by bolts in the upper and lower parts; the upper part of the arc-shaped steel plate is reserved for welding with the hanging bar reinforcement.

[0011] Based on the above technical features: the limiting channel steel and the steel cross beam at the bottom are integrated and adopt the same channel steel.

[0012] The vertical load bearing structure suitable for the long-distance servo steel support system has the advantages and positive effects that:

[0013] 1. The steel pipe support is limited by the channel steel, and the angle of the steel column may not be parallel to the support direction due to the construction error on site, so the direction of the fixed channel steel limiting and fixing structure can be adjusted according to the actual construction angle of the steel column.

[0014] 2. The vertical force of the self weight of the steel pipe support is transmitted to the steel column through the upper bearing type system. When the upper bearing type system fails, the steel cross beam can also bear the vertical force as a backup measure.

[0015] 3. The vertical load bearing component height below the steel pipe support is reduced through the upper bearing type system, and the stress components such as the lower bearing type steel hanger are cancelled.

[0016] 4. The net distance requirement from the underground structure is reduced through the upper bearing type system, and the vertical arrangement of the steel pipe support is not limited.

[0017] In summary, the vertical stress of the support is met, the collision problem with the underground structure is solved, the design and construction difficulty is reduced, and the actual situation on site can be flexibly adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic view of the embodiment of the utility model.

[0019] Figure 2 It is a schematic view of the sleeve of the embodiment of the utility model.

[0020] Figure 3 It is a three-dimensional schematic view of the embodiment of the utility model.

[0021] The reference signs in the drawing are as follows:

[0022] 00-steel pipe support; 10-arc steel plate; 20-bolt; 30-limiting channel steel; 40-steel cross beam; 50-steel column; 60-hanging bar steel bar. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present application, and are not a limitation on the present application.

[0024] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the device or element indicated, and therefore cannot be understood as a limitation on the device or element indicated. Therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense.

[0026] Reference Figure 1 and Figure 3 The vertical load bearing structure of the top-supported servo steel support is: two steel pipe supports 00 in a group, a steel column 50 is arranged between the two steel pipe supports 00, and the top-supported system includes an arc-shaped steel plate 10 and a hanging bar steel bar 60; the arc-shaped steel plate 10 is sleeved on the outer wall of the steel pipe support 00 to form a sleeve; the lower end of the hanging bar steel bar 60 is fixed to the top of the sleeve, and the top of the hanging bar steel bar 60 is connected to the steel column 50; the steel pipe support 00 transmits the dead weight to the steel column 50 through the hanging bar steel bar 60.

[0027] The structure also includes a limiting system, and the limiting system includes a limiting channel steel 30 and a steel cross beam 40; the limiting channel steel 30 is arranged around the steel pipe support 00 to frame the steel pipe support 00; one end of the steel cross beam 40 is connected to the steel column 50, and the other end is connected to the limiting channel steel 30. As shown in Figure 1 and Figure 3 The limiting channel steel 30 at the bottom and the steel cross beam 40 are connected in one body, and the same channel steel is used, that is, the elongated steel cross beam 40 also serves as the limiting channel steel 30. In order to facilitate construction, the limiting channel steels 30 at the upper portions of the two side steel pipe supports 00 can also be connected into one channel steel.

[0028] As shown in Figure 2As shown, the arc-shaped steel plate 10 is two pieces, and is fixed by bolts 20 from top to bottom; the arc-shaped steel plate 10 has a reserved welding length with the hanging bar steel bar 60 at the upper part, and the arc-shaped steel plate 10 and the hanging bar steel bar 60 are double-sided welded, and the welding length is not less than 5d (d is the diameter of the hanging bar steel bar 60).

[0029] The hanging bar steel bar 60 is single-sided welded with the steel column 50, and the welding length is not less than 10d (d is the diameter of the hanging bar steel bar 60).

[0030] The steel cross beam 40 is fully welded with the steel column 50.

[0031] Referring to Figure 3 The limiting channel steel 30 and the steel cross beam 40 are each provided with a group on the front and back sides of the steel column. Each steel column 50 is provided with two hanging points on the left and right sides of the steel pipe support 00, and a total of four hanging points are provided.

[0032] The arc-shaped steel plate 10, the bolt 20 and the hanging bar steel bar 60 are located outside the limiting channel steel 30 and the steel cross beam 40.

[0033] According to a large number of long-distance steel support servo system engineering experiences, the utility model is provided for the foundation pit with a steel pipe support with a width greater than 20m, and a steel column and a column pile should be provided as a vertical bearing component when the length of the steel pipe support is greater than 20m. The self-weight of the conventional steel pipe support is transmitted to the steel column through the lower bearing type inclined bracket and the joist. However, due to the high height of the joist and the inclined support, the inclined support may collide with the structure below in the process of structure back construction, so that the steel pipe support is removed first, and the deformation of the enclosure is adversely affected.

[0034] The foundation pit with a long-distance steel support servo system is mostly located on the side of a protected object. In order to control the deformation of the foundation pit enclosure, the vertical spacing of the steel pipe support is small, the space occupied by the lower bearing type inclined bracket leads to the need to consider a large net distance reserved for the structure, the arrangement of the steel pipe support is difficult, and the deformation control of the enclosure is affected. The construction difficulty of the lower bearing structure is large, and each node position needs to be locally excavated downward by nearly 2m, which seriously affects the construction period.

[0035] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and substitutions can be made without departing from the technical principles of the utility model, and these improvements and substitutions should also be regarded as the protection range of the utility model.

Claims

1. A top-lift servo steel bracing vertical load bearing construction, transverse steel tube braces (00) are in pairs, steel columns (50) are arranged between two of the steel tube braces (00), characterized in that: The upper bearing system comprises an arc-shaped steel plate (10) and a hanging bar steel bar (60); the arc-shaped steel plate (10) is sleeved on the outer wall of the steel pipe support (00) to form a sleeve; the lower end of the hanging bar steel bar (60) is fixed to the top of the sleeve, and the top of the hanging bar steel bar (60) is connected and fixed to the steel column (50); the steel pipe support (00) transmits the dead weight to the steel column (50) through the hanging bar steel bar (60).

2. A top-lift servo steel support vertical load carrying construction as claimed in claim 1 wherein: The limiting system further comprises a limiting channel steel (30) and a profile steel cross beam (40); the limiting channel steel (30) is arranged around the steel pipe support (00) to frame the steel pipe support (00); one end of the profile steel cross beam (40) is connected to the steel column (50), and the other end is connected to the limiting channel steel (30).

3. A top-lift servo steel support vertical load carrying construction as claimed in claim 2 wherein: The upper bearing system is located outside the limiting system.

4. A top-charged servo steel support vertical load carrying construction as claimed in claim 1 or 2 or 3 wherein: The arc-shaped steel plate (10) is composed of two pieces of steel plates which are fixed by bolts (20) in the left and right and up and down directions; the upper part of the arc-shaped steel plate (10) is reserved for welding with the hanging bar steel bar (60).

5. A top-chord servo steel bracing vertical load carrying construction according to claim 2 or 3, wherein: The limiting channel steel (30) and the profile steel cross beam (40) at the bottom are connected into one body and adopt the same channel steel.

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