Construction method of steel support

Abstract

The invention discloses a construction method of a steel support, which is used for installing the steel support in a foundation pit, and is characterized in that the construction method comprises the following steps: respectively arranging an installation part and a support assembly in the foundation pit so as to respectively form a first installation position and a second installation position in the foundation pit; through cooperation of hoisting equipment and traction equipment, the first steel support is obliquely hoisted into the foundation pit and then horizontally placed at the first installation position, and the second steel support is obliquely hoisted into the foundation pit and then horizontally placed at the second installation position in sequence; and one end of the first steel support is connected with one mounting piece at the first mounting position, one end of the second steel support is connected with one mounting piece at the second mounting position, and the other end of the first steel support is connected with the other end of the second steel support under the supporting effect of the supporting assembly. According to the technical scheme, the first steel support and the second steel support which are long can be smoothly hoisted into the foundation pit.

Description

Technical Field

[0001] The present application relates to the technical field of steel support installation, and in particular to a construction method of a steel support. Background Art

[0002] In the foundation pit, in order to ensure that the foundation pit does not collapse, a retaining structure and a large number of connecting beams are usually set up in the foundation pit. During the further excavation construction of the foundation pit, steel supports need to be set up in the foundation pit to provide temporary support for the newly excavated foundation pit to prevent the collapse of the foundation pit.

[0003] Since there are many connecting beams in the foundation pit, and the two complete steel supports are usually long in length, the steel supports cannot pass through the gaps between the connecting beams in a horizontal state. Therefore, the steel supports cannot be hoisted into the foundation pit for installation after being assembled. The steel supports usually need to be divided into multiple sections, hoisted into the foundation pit separately, and then spliced ​​and installed in the foundation pit using tools such as forklifts. However, the steel supports occupy a large space in the foundation pit during the installation operation, which restricts the progress of construction projects such as earth excavation, resulting in slow construction of the overall project and increased construction costs. Summary of the Invention

[0004] The main purpose of this application is to provide a steel support construction method, which aims to improve the problem in the existing steel support construction method that due to the numerous connecting beams set in the foundation pit, the steel support needs to be divided into multiple sections and hoisted into the foundation pit separately.

[0005] To achieve the above-mentioned purpose, the present application proposes a steel support construction method for installing the steel support in a foundation pit, and the construction method comprises the following steps:

[0006] A mounting member and a support assembly are respectively arranged in the foundation pit to form a first mounting position and a second mounting position in the foundation pit;

[0007] By cooperating with the lifting equipment and the pulling equipment, the first steel support is sequentially lifted obliquely into the foundation pit and then horizontally placed at the first installation position, and the second steel support is sequentially lifted obliquely into the foundation pit and then horizontally placed at the second installation position;

[0008] Connect one end of the first steel support to the mounting piece at the first mounting position, connect one end of the second steel support to the mounting piece at the second mounting position, and under the support of the support assembly, connect the other end of the first steel support to the other end of the second steel support.

[0009] In some embodiments of the present application, the step of respectively arranging a mounting member and a support assembly in the foundation pit to respectively form a first mounting position and a second mounting position in the foundation pit includes:

[0010] The mounting members are respectively arranged on opposite sides of the retaining structure of the foundation pit, and the support assembly is arranged between the two mounting members to form the first mounting position between the support assembly and one mounting member and the second mounting position between the support assembly and the other mounting member.

[0011] In some embodiments of the present application, the mounting member is a triangular bracket, and the step of respectively providing the mounting members on opposite sides of the retaining structure of the foundation pit includes:

[0012] The triangular brackets are respectively welded and fixed on opposite sides of the enclosure structure of the foundation pit.

[0013] In some embodiments of the present application, the support assembly includes a pad and a hydraulic jacking device, and the step of arranging the support assembly between the two mounting members includes:

[0014] Placing the pad on the excavation surface of the foundation pit so that the pad is located between the two mounting members;

[0015] The hydraulic jacking device is fixed on the backing plate so that the hydraulic jacking device is located on the connecting line between the two mounting parts.

[0016] In some embodiments of the present application, the step of using a lifting device and a traction device to tilt the first steel support into the foundation pit and then horizontally placing the first steel support at the first installation position includes:

[0017] The main hook and the auxiliary hook of the hoisting equipment are respectively connected to the first steel support so that the first steel support is tilted, and then the first steel support is hoisted into the foundation pit;

[0018] Connecting one end of the first steel support close to the bottom of the foundation pit to the traction device through a steel rope, and disconnecting one end of the first steel support close to the bottom of the foundation pit from the hoisting device;

[0019] Through the cooperation of the traction equipment and the hoisting equipment, the first steel support is horizontally pulled to above the first installation position, and then the first steel support is horizontally placed at the first installation position.

[0020] In some embodiments of the present application, the step of connecting the main hook and the auxiliary hook of the hoisting equipment to the first steel support respectively to tilt the first steel support includes:

[0021] Connecting the main hook to both ends of the first steel support through long slings, so that the first steel support is tilted;

[0022] The auxiliary hook is connected to an end of the first steel support away from the bottom of the foundation pit through a short sling.

[0023] In some embodiments of the present application, the step of connecting the end of the first steel support near the bottom of the foundation pit to the traction device through a steel rope and disconnecting the end of the first steel support near the bottom of the foundation pit from the lifting device includes:

[0024] Connecting one end of the first steel support close to the bottom of the foundation pit to the traction device via a steel rope;

[0025] Lifting one end of the first steel support close to the bottom of the foundation pit by the traction device, so that the long sling changes from being tensioned to being relaxed;

[0026] The connection between the long sling and the first steel support is released to release the connection between the main hook and the first steel support through the long sling.

[0027] In some embodiments of the present application, the step of using a lifting device and a traction device to tilt the second steel support into the foundation pit and then horizontally placing the second steel support at the second installation position includes:

[0028] The main hook and the auxiliary hook of the hoisting equipment are respectively connected to the second steel support so that the second steel support is tilted, and then the second steel support is hoisted into the foundation pit;

[0029] Connecting one end of the second steel support close to the bottom of the foundation pit to the traction device through a steel rope, and disconnecting one end of the second steel support close to the bottom of the foundation pit from the hoisting device;

[0030] Through the cooperation of the traction equipment and the hoisting equipment, the second steel support is horizontally pulled to above the second installation position, and then the second steel support is horizontally placed at the second installation position.

[0031] In some embodiments of the present application, the step of connecting the main hook and the auxiliary hook of the hoisting equipment to the second steel support respectively so that the second steel support is tilted includes:

[0032] Connecting the main hook to both ends of the second steel support through long slings, so that the second steel support is tilted;

[0033] The auxiliary hook is connected to an end of the second steel support away from the bottom of the foundation pit through a short sling.

[0034] In some embodiments of the present application, the step of connecting the end of the second steel support close to the bottom of the foundation pit to the traction device through a steel rope and disconnecting the end of the second steel support close to the bottom of the foundation pit from the lifting device includes:

[0035] Connecting one end of the second steel support close to the bottom of the foundation pit to the traction device via a steel rope;

[0036] Lifting one end of the second steel support close to the bottom of the foundation pit by the traction device, so that the long sling changes from being tensioned to being relaxed;

[0037] The connection between the long sling and the second steel support is released to release the connection between the main hook and the second steel support through the long sling.

[0038] The construction method of the steel support provided by the embodiment of the present invention is to tilt the first steel support and the second steel support into the foundation pit respectively, shorten the projection length of the first steel support and the second steel support on the horizontal plane, so that the first steel support and the second steel support with a longer length can smoothly pass through the gap between the connecting beams, and then through the cooperation of the lifting equipment and the traction equipment, the first steel support and the second steel support are restored to a horizontal state, and are placed in the first installation position and the second installation position respectively, and finally the first steel support and the second steel support are spliced ​​and installed. It can be seen that the construction method of the steel support provided by the embodiment of the present invention can smoothly lift the first steel support and the second steel support with a longer length into the foundation pit respectively, and through the cooperation of the lifting equipment and the traction equipment, the first steel support and the second steel support are placed horizontally in the first installation position and the second installation position respectively for subsequent installation work. In this way, while not needing to occupy a large space in the foundation pit, the installation efficiency of the steel support is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0040] Figure 1 This is a structural diagram of an embodiment of a construction method for steel support of the present application;

[0041] Figure 2 This is the state when the hoisting equipment tilts the first steel support into the foundation pit;

[0042] Figure 3This is the state when the hoisting equipment and traction equipment cooperate to lift the first steel support;

[0043] Figure 4 In the process of coordination between traction equipment and lifting equipment;

[0044] Figure 5 It is the state when the traction equipment and the lifting equipment cooperate to pull the first steel support horizontally to above the first installation position.

[0045] Description of Figure Numbers:

[0046] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0050] Please refer to Figures 1 to 5 The embodiment of the present application provides a steel support construction method for installing a steel support in a foundation pit, the construction method comprising the following steps:

[0051] Step S10: installing components and supporting components in the foundation pit to form a first installation position and a second installation position in the foundation pit.

[0052] Step S20: Through the cooperation of the lifting equipment and the traction equipment, the first steel support is tilted and lifted into the foundation pit, and then placed horizontally at the first installation position, and the second steel support is tilted and lifted into the foundation pit, and then placed horizontally at the second installation position.

[0053] Step S30: Connect one end of the first steel support to a mounting piece at the first mounting position, connect one end of the second steel support to a mounting piece at the second mounting position, and connect the other end of the first steel support to the other end of the second steel support under the support of the support assembly.

[0054] The aforementioned mounting components primarily serve to facilitate the installation of the first or second steel support, providing temporary support for the foundation pit after the steel support is installed. The support assembly primarily functions to form a first and second mounting position with the two mounting components, respectively, supporting the first and second steel supports, thereby interconnecting them under the support of the support assembly.

[0055] The lifting equipment includes but is not limited to tower cranes, crawler cranes, and tire cranes. The function of the lifting equipment is to tilt the first steel support and the second steel support outside the foundation pit into the foundation pit, and cooperate with the traction equipment to place the first steel support and the second steel support horizontally at the first installation position and the second installation position, respectively.

[0056] The traction device is typically movably installed within the foundation pit. When the hoisting device tilts the first or second steel support into the foundation pit, the traction device and the hoisting device cooperate to restore the first or second steel support to a horizontal position and then place it in the first or second installation position. The traction device includes but is not limited to a crane, forklift, etc.

[0057] Of course, in some other examples, the traction equipment can be fixed outside the foundation pit and movably provided with an extension arm. The traction equipment extends into the foundation pit through the extension arm and cooperates with the lifting equipment to restore the first steel support or the second steel support to a horizontal state, and then is placed in the first installation position or the second installation position.

[0058] It should be noted that the coordination of the lifting equipment and the traction equipment usually means that the lifting equipment lifts the first steel support or the second steel support so that the first steel support or the second steel support is suspended or semi-suspended, and at the same time the traction equipment drags, pulls, lifts, and other operations on the first steel support or the second steel support.

[0059] The first steel support or the second steel support can be connected to the mounting member by a fixed connection method such as welding or riveting. Similarly, the first steel support and the second steel support can also be connected by a fixed connection method such as welding or riveting.

[0060] It should be noted that before the steel support is installed in the foundation pit, there are usually many connecting beams in the foundation pit. The gaps between these connecting beams limit the lifting range of the steel support by the lifting equipment.

[0061] The construction method of the steel support provided by the embodiment of the present invention is to tilt the first steel support and the second steel support into the foundation pit respectively, shorten the projection length of the first steel support and the second steel support on the horizontal plane, so that the first steel support and the second steel support with a longer length can smoothly pass through the gap between the connecting beams, and then through the cooperation of the lifting equipment and the traction equipment, the first steel support and the second steel support are restored to a horizontal state, and are placed in the first installation position and the second installation position respectively, and finally the first steel support and the second steel support are spliced ​​and installed. It can be seen that the construction method of the steel support provided by the embodiment of the present invention can smoothly lift the first steel support and the second steel support with a longer length into the foundation pit respectively, and through the cooperation of the lifting equipment and the traction equipment, the first steel support and the second steel support are placed horizontally in the first installation position and the second installation position respectively for subsequent installation work. In this way, while not needing to occupy a large space in the foundation pit, the installation efficiency of the steel support is also improved.

[0062] In some embodiments of the present invention, step S10 includes:

[0063] Step S11: Mounting members are respectively arranged on opposite sides of the retaining structure of the foundation pit, and a supporting assembly is arranged between the two mounting members to form a first mounting position between the supporting assembly and one mounting member and a second mounting position between the supporting assembly and the other mounting member.

[0064] The opposite sides of the retaining structure of the foundation pit refer to the two sides facing each other in the foundation pit. The mounting parts can be mounted on the retaining structure by welding, riveting or other connection methods.

[0065] In this way, the stability of the first steel support and the second steel support placed at the first installation position and the second installation position respectively can be improved, which facilitates the subsequent splicing and installation of the first steel support and the second steel support.

[0066] In step S11 of some embodiments of the present invention, the mounting member is a triangular bracket, and the step of respectively providing the mounting members on opposite sides of the retaining structure of the foundation pit includes:

[0067] Triangular brackets are welded and fixed on opposite sides of the retaining structure of the foundation pit.

[0068] In this way, the stability and reliability of the mounting member can be improved, thereby improving the stability and reliability of the first steel support and the second steel support after they are installed.

[0069] In step S11 of some embodiments of the present invention, the support assembly includes a backing plate and a hydraulic jacking device, and the step of arranging the support assembly between the two mounting members includes:

[0070] Step S111: placing a pad on the excavation surface of the foundation pit, and making the pad located between the two mounting parts.

[0071] Step S112: Fix the hydraulic jacking device on the backing plate, and make the hydraulic jacking device be located on the connecting line between the two mounting parts.

[0072] In this way, the horizontality of the first steel support and the second steel support can be adjusted by the hydraulic jacking device, thereby improving the efficiency of the connection between the first steel support and the second steel support.

[0073] In step S20 of some embodiments of the present invention, the step of tilting the first steel support into the foundation pit and then horizontally placing the first steel support at the first installation position by cooperating with the hoisting equipment and the traction equipment includes:

[0074] Step S21: The main hook and the auxiliary hook of the hoisting equipment are connected to the first steel support respectively, so that the first steel support is tilted, and then the first steel support is hoisted into the foundation pit.

[0075] Step S22: connecting one end of the first steel support close to the bottom of the foundation pit to the traction equipment through a steel rope, and disconnecting one end of the first steel support close to the bottom of the foundation pit from the lifting equipment.

[0076] Step S23: After the first steel support is horizontally pulled to above the first installation position through the cooperation of the traction equipment and the lifting equipment, the first steel support is horizontally placed at the first installation position.

[0077] In this way, by untying the connection between the end of the first steel support close to the bottom of the foundation pit and the lifting equipment, the operating space for the traction equipment to drag, pull, lift, etc. on the first steel support can be expanded, and the operation of the traction equipment is facilitated.

[0078] In step S21 of some embodiments of the present invention, the step of connecting the main hook and the auxiliary hook of the hoisting equipment to the first steel support respectively to tilt the first steel support includes:

[0079] Step S211: Connect the main hook to both ends of the first steel support through a long sling, so that the first steel support is tilted.

[0080] Step S212: Connect the auxiliary hook to the end of the first steel support away from the bottom of the foundation pit through a short sling.

[0081] In this way, in the subsequent steps, the connection between the long sling and the first steel support can be untied to quickly untie the connection between the main hook and the first steel support through the long sling, and after untying the long sling, the influence of the connecting beam on the short sling is reduced.

[0082] Of course, in some other examples, the step of tilting the first steel support by connecting the main hook and the auxiliary hook of the lifting equipment to the first steel support respectively may include:

[0083] The main hook is connected to one end of the first steel support through a long sling, and the auxiliary hook is connected to the other end of the first steel support through a short sling, so that the first steel support is tilted.

[0084] In step S22 of some embodiments of the present invention, the steps of connecting the end of the first steel support near the bottom of the foundation pit to the traction device via a steel rope and disconnecting the end of the first steel support near the bottom of the foundation pit from the lifting device include:

[0085] Step S221: Connecting one end of the first steel support close to the bottom of the foundation pit to the traction equipment through a steel rope;

[0086] Step S222: lifting one end of the first steel support close to the bottom of the foundation pit by using a traction device, so that the long sling changes from being tensioned to being relaxed;

[0087] Step S223: Untie the connection between the long sling and the first steel support to untie the connection between the main hook and the first steel support through the long sling.

[0088] In this way, the long sling is relaxed from being tensioned, which further facilitates the operation of untying the connection between the long sling and the first steel support.

[0089] Of course, in other examples, one end of the first steel support can be made to touch the ground by using the lifting equipment, so that the long lifting rope changes from being tensioned to being relaxed.

[0090] In step S20 of some embodiments of the present invention, the step of tilting the second steel support into the foundation pit and then horizontally placing the second steel support at the second installation position by cooperating with the hoisting equipment and the traction equipment includes:

[0091] Step S24: The main hook and the auxiliary hook of the hoisting equipment are connected to the second steel support respectively, so that the second steel support is tilted, and then the second steel support is hoisted into the foundation pit.

[0092] Step S25: Connect one end of the second steel support close to the bottom of the foundation pit to the traction equipment through a steel rope, and disconnect the other end of the second steel support close to the bottom of the foundation pit from the lifting equipment.

[0093] Step S26: After the second steel support is horizontally pulled to above the second installation position through the cooperation of the traction equipment and the lifting equipment, the second steel support is horizontally placed at the second installation position.

[0094] In this way, by untying the connection between the end of the second steel support close to the bottom of the foundation pit and the lifting equipment, the operating space for the traction equipment to drag, pull, lift, etc. on the second steel support can be expanded, and the operation of the traction equipment is facilitated.

[0095] In step S24 of some embodiments of the present invention, the step of connecting the main hook and the auxiliary hook of the hoisting equipment to the second steel support respectively to tilt the second steel support includes:

[0096] Step S241: Connect the main hook to both ends of the second steel support through a long sling, so that the second steel support is tilted.

[0097] Step S242: Connect the auxiliary hook to the end of the second steel support away from the bottom of the foundation pit through a short sling.

[0098] In this way, in the subsequent steps, the connection between the long sling and the second steel support can be untied to quickly untie the connection between the main hook and the second steel support through the long sling, and after untying the long sling, the influence of the connecting beam on the short sling can be reduced.

[0099] Of course, in some other examples, the step of tilting the first steel support by connecting the main hook and the auxiliary hook of the lifting equipment to the second steel support respectively may include:

[0100] The main hook is connected to one end of the second steel support through a long sling, and the auxiliary hook is connected to the other end of the second steel support through a short sling, so that the second steel support is tilted.

[0101] In step S25 of some embodiments of the present invention, the steps of connecting the end of the second steel support near the bottom of the foundation pit to the traction device via a steel rope and disconnecting the end of the second steel support near the bottom of the foundation pit from the lifting device include:

[0102] Step S251: Connect one end of the second steel support close to the bottom of the foundation pit to the traction equipment through a steel rope.

[0103] Step S252: lift one end of the second steel support close to the bottom of the foundation pit by using a traction device, so that the long sling changes from being tensioned to being relaxed.

[0104] Step S253: Untie the connection between the long sling and the second steel support to untie the connection between the main hook and the second steel support through the long sling.

[0105] In this way, the long sling is relaxed from being tensioned, which further facilitates the operation of untying the connection between the long sling and the second steel support.

[0106] Of course, in other examples, one end of the second steel support can be made to touch the ground by using the lifting equipment, so that the long lifting rope changes from being tensioned to being relaxed.

[0107] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for constructing a steel support for installing a steel support in a foundation pit, characterized in that: The construction method comprises the following steps: A mounting member and a support assembly are respectively arranged in the foundation pit to form a first mounting position and a second mounting position in the foundation pit; By cooperating with the lifting equipment and the pulling equipment, the first steel support is sequentially lifted obliquely into the foundation pit and then horizontally placed at the first installation position, and the second steel support is sequentially lifted obliquely into the foundation pit and then horizontally placed at the second installation position; Connect one end of the first steel support to the mounting piece at the first mounting position, connect one end of the second steel support to the mounting piece at the second mounting position, and under the support of the support assembly, connect the other end of the first steel support to the other end of the second steel support.

2. The construction method according to claim 1, wherein: The steps of respectively arranging a mounting member and a supporting assembly in the foundation pit to form a first mounting position and a second mounting position in the foundation pit include: The mounting members are respectively arranged on opposite sides of the retaining structure of the foundation pit, and the support assembly is arranged between the two mounting members to form the first mounting position between the support assembly and one mounting member and the second mounting position between the support assembly and the other mounting member.

3. The construction method according to claim 2, wherein: The mounting member is a triangular bracket, and the steps of respectively arranging the mounting members on opposite sides of the retaining structure of the foundation pit include: The triangular brackets are respectively welded and fixed on opposite sides of the enclosure structure of the foundation pit.

4. The construction method according to claim 2, wherein: The support assembly includes a pad and a hydraulic jacking device, and the step of arranging the support assembly between the two mounting members includes: Placing the pad on the excavation surface of the foundation pit so that the pad is located between the two mounting members; The hydraulic jacking device is fixed on the backing plate so that the hydraulic jacking device is located on the connecting line between the two mounting parts.

5. The construction method according to claim 1, wherein: The step of tilting the first steel support into the foundation pit and then horizontally placing the first steel support at the first installation position by cooperating with the hoisting equipment and the traction equipment includes: The main hook and the auxiliary hook of the hoisting equipment are respectively connected to the first steel support so that the first steel support is tilted, and then the first steel support is hoisted into the foundation pit; Connecting one end of the first steel support close to the bottom of the foundation pit to the traction device through a steel rope, and disconnecting one end of the first steel support close to the bottom of the foundation pit from the hoisting device; Through the cooperation of the traction equipment and the hoisting equipment, the first steel support is horizontally pulled to above the first installation position, and then the first steel support is horizontally placed at the first installation position.

6. The construction method according to claim 5, wherein: The step of connecting the main hook and the auxiliary hook of the hoisting equipment to the first steel support respectively so that the first steel support is tilted includes: Connecting the main hook to both ends of the first steel support through long slings, so that the first steel support is tilted; The auxiliary hook is connected to an end of the first steel support away from the bottom of the foundation pit through a short sling.

7. The construction method according to claim 6, wherein: The step of connecting the end of the first steel support close to the bottom of the foundation pit to the traction device through a steel rope and disconnecting the end of the first steel support close to the bottom of the foundation pit from the hoisting device comprises: Connecting one end of the first steel support close to the bottom of the foundation pit to the traction device via a steel rope; Lifting one end of the first steel support close to the bottom of the foundation pit by the traction device, so that the long sling changes from being tensioned to being relaxed; The connection between the long sling and the first steel support is released to release the connection between the main hook and the first steel support through the long sling.

8. The construction method according to claim 1, wherein: The step of tilting the second steel support into the foundation pit and then horizontally placing the second steel support at the second installation position by cooperating with the hoisting equipment and the traction equipment includes: The main hook and the auxiliary hook of the hoisting equipment are respectively connected to the second steel support so that the second steel support is tilted, and then the second steel support is hoisted into the foundation pit; Connecting one end of the second steel support close to the bottom of the foundation pit to the traction device through a steel rope, and disconnecting one end of the second steel support close to the bottom of the foundation pit from the hoisting device; Through the cooperation of the traction equipment and the hoisting equipment, the second steel support is horizontally pulled to above the second installation position, and then the second steel support is horizontally placed at the second installation position.

9. The construction method according to claim 8, wherein: The step of connecting the main hook and the auxiliary hook of the hoisting equipment to the second steel support respectively so that the second steel support is tilted includes: Connecting the main hook to both ends of the second steel support through long slings, so that the second steel support is tilted; The auxiliary hook is connected to an end of the second steel support away from the bottom of the foundation pit through a short sling.

10. The construction method according to claim 9, characterized in that: The step of connecting the end of the second steel support close to the bottom of the foundation pit to the traction device through a steel rope and disconnecting the end of the second steel support close to the bottom of the foundation pit from the hoisting device comprises: Connecting one end of the second steel support close to the bottom of the foundation pit to the traction device via a steel rope; Lifting one end of the second steel support close to the bottom of the foundation pit by the traction device, so that the long sling changes from being tensioned to being relaxed; The connection between the long sling and the second steel support is released to release the connection between the main hook and the second steel support through the long sling.

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