Crane-free construction platform for pier stud bent cap

Abstract

The utility model discloses a pier stud bent cap crane-free construction platform which comprises a lifting device, a platform body, a hanging cage, a supporting assembly and an elevation adjusting piece, and the lifting device is arranged at the top of a pier stud; the platform body is connected with the lifting device and is lifted by the lifting device; the hanging cage is arranged on the lower portion of the platform body and corresponds to the pier column. The supporting assembly is located on the side, close to a pier column, of the hanging cage, and when used, the supporting assembly is connected with a cross-core rod on the pier column and supports the platform body with the cross-core rod as a supporting point. The elevation adjusting piece is fixedly arranged at the top of the supporting assembly, connected with the platform body and used for adjusting the elevation of the platform body. According to the construction platform, the cross-core rods serve as supporting points, the elevation of the platform body can be adjusted through the elevation adjusting pieces, and therefore the requirement for formwork erecting elevation is met.

Description

Technical Field

[0001] This utility model relates to the field of pier and cap beam construction technology, specifically to a crane-free pier and cap beam construction platform. Background Technology

[0002] The cap (tie) beams in bridge piers are a crucial component of the bridge structure, providing continuous support. To ensure their safety and stability, specific construction methods are required. Currently, there are three main methods for constructing cap (tie) beams in highway construction: the through-core steel bar method, the full-span scaffolding method, and the steel clamp method. All of these methods require repeated platform erection when constructing multiple cap (tie) beams on the same pier.

[0003] CN118422588A discloses a bridge double-column pier self-lifting frame system, which specifically uses an electric hoist to lift the construction platform. However, this system can only use an electric hoist when adjusting the formwork elevation, making the adjustment relatively difficult.

[0004] Therefore, a construction platform that allows for easy adjustment of formwork elevation is needed. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a crane-free construction platform for pier cap beams. An elevation adjustment component is installed below the platform for construction workers to adjust, using a mandrel as a support point to adjust the elevation of the platform body.

[0006] Specifically, this utility model is implemented as follows:

[0007] A crane-free construction platform for pier cap beams includes:

[0008] The lifting device is located at the top of the pier.

[0009] The platform body is connected to the lifting device and is raised and lowered by the lifting device;

[0010] The hanging cage is located at the lower part of the platform body and is arranged corresponding to the pier column;

[0011] The support component is located on the side of the hanging cage near the pier. In use, it is connected to the through rod on the pier and supports the platform body with the through rod as the support point.

[0012] An elevation adjustment component is fixedly installed on the top of the support assembly and connected to the platform body, and is used to adjust the elevation of the platform body.

[0013] Furthermore, the support component is a support base, which includes:

[0014] The locking part is secured to the first through-hole rod;

[0015] The perforated part is located above the bayonet part. When in use, the second through-hole rod passes through the perforated part.

[0016] A support portion is provided above the perforated portion and extends into the hanging cage in a "┐" shape to support the elevation adjustment component.

[0017] Furthermore, the hanging cage has several horizontal bars arranged vertically, and these horizontal bars form a ladder for entering and exiting the hanging cage.

[0018] Furthermore, the elevation adjustment component is a jack.

[0019] Furthermore, the lifting device includes:

[0020] A spreader beam is fixed to the top of the pier column;

[0021] An electric hoist is mounted on the spreader beam and connected to the platform body.

[0022] Furthermore, the spreader beam includes two symmetrical channel steels, which are connected by bolts and clamp the main reinforcement of the pier column.

[0023] Furthermore, a pad is provided at the lower part of the spreader beam.

[0024] Furthermore, the spreader beam is deflected circumferentially along the pier column so that the spreader beam is arranged obliquely.

[0025] The working principle of this utility model:

[0026] After the first section of the pier is poured, the lifting device is installed on top of the pier, and the hook of the lifting device is hooked into the lifting lug of the platform body below. The platform is lifted 1700mm off the ground and stopped. The hanging cage is then installed, and the mandrel, support components, and elevation adjustment components are placed inside the hanging cage. After the lifting device lifts the platform body into position, the mandrel and support components are manually installed. After the mandrel is inserted into the hole in the pier, the support components are connected and fixed to the mandrel. Then, the elevation adjustment components are placed on the support components, with their tops abutting against the platform body. The height of the platform body can be adjusted slightly using the elevation adjustment components, thereby achieving the adjustment of the platform body's elevation.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] (1) The pier column cap beam construction platform without crane provided by this utility model can realize small-range adjustment of platform height, thereby meeting the formwork elevation requirements.

[0029] (2) The crossbar of the hanging cage serves as a reinforcing component and also forms a ladder between the cage and the platform, making it easier for construction workers to enter and exit to install components such as the core rod. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the pier cap beam without a crane construction platform in Example 1;

[0031] Figure 2 This is a top view of the pier cap beam without a crane construction platform in Example 1;

[0032] Figure 3 This is a side view of the pier cap beam without a crane construction platform in Example 1;

[0033] Figure 4 This is a schematic diagram of the lifting device in Example 1;

[0034] Figure 5 This is a schematic diagram of the hanging cage structure in Example 1;

[0035] Figure 6 This is a schematic diagram of the support component structure in Example 1;

[0036] Figure 7 This is a schematic diagram of the support base in Example 1;

[0037] Figure 8 This is a diagram showing the usage status of the pier cap beam construction platform without a crane in Example 1.

[0038] Figure label:

[0039] 1-Platform body; 2-Lifting device; 21-Channel steel; 22-Electric hoist; 23-Plate; 3-Hanging cage; 31-Horizontal bar; 4-Pier column; 41-First through-bar; 42-Second through-bar; 43-Threaded steel; 5-Construction tower ladder; 6-Support base; 61-Clamping part; 62-Perforation part; 63-Support part; 7-Jack. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figure 1-3 As shown, this embodiment provides a crane-free construction platform for pier cap beams, including: a lifting device 2, a platform body 1, a hanging cage 3, support components, and elevation adjustment components. The platform body 1 is entirely made of Q235B carbon structural steel, with a 3mm steel plate on the upper part serving as a walkway. Two sets of lifting devices 2 are respectively installed on the tops of two pier columns 4, and are fixed by clamping the main reinforcing bars at the top of the pier columns 4. Figure 4As shown, the lifting device 2 consists of a spreader beam and 10t electric hoists 22 at both ends of the spreader beam. The spreader beam is composed of two symmetrical C18a channel steels 21, which are connected by bolts and clamped to the main reinforcement of the pier column 4 for fixation. A pad 23 is installed at the bottom of the spreader beam. The spreader beam is deflected around the pier column 4 at an angle of 33° to the left of the width of the platform body 1, offsetting the positions of the jacks 7, the mandrel, and the hanging cage 3 to avoid vertical overlap affecting the structural function. Both spreader beams on the platform system are deflected 33° to the left to ensure the stability of the platform system. The hooks of the electric hoists 22 are hooked into the lifting lugs 11 on the platform body 1 below, and the platform body 1 is raised and lowered by the electric hoists 22.

[0043] There are four hanging cages 3, located on both sides of the two piers 4, as follows: Figure 5 As shown, each cage 3 is made of Q235B carbon structural steel, and several crossbars 31 are provided on its side wall. The crossbars 31 are arranged vertically to form a ladder for construction personnel to enter and exit the cage 3 from the platform body 1. At the same time, the crossbars 31 serve as structural components to improve the overall strength and stability of the cage 3.

[0044] like Figure 6-7 As shown, the support assembly consists of four support seats 6, corresponding to the two sides of the two piers 4. Each support seat 6 is welded from steel plates. The support seats 6 are not connected to the hanging cage 3, but instead use the through rods as support points to support the platform body 1. Each support seat 6 consists of a lower locking part 61, a middle perforated part 62, and an upper "┐"-shaped support part 63. The elevation adjustment component is located on the support part 63, and a 50-ton jack 7 is used to support the platform body 1. The through rods include two Φ90*3000mm steel rods, specifically a second through rod 42 and a first through rod 41 arranged vertically. The second through rod 42 is sheared, while the first through rod 41 is anti-overturning (tumbling). The locking part 61 is engaged with the first through rod 41, and the middle perforated part 62 is used to thread the second through rod 42. The support seat 6 is tightened by the precision-rolled threaded steel bar 43 and bolts to ensure that the support seat 6 is in close contact with the pier column 4.

[0045] During construction, the electric hoist 22 lifts the platform body 1 to the corresponding position. Then, the construction personnel enter the hanging cage 3 to install the core rod, support seat 6 and elevation adjustment component (jack 7). After installation, the height of the platform body 1 is adjusted by the jack 7 to meet the formwork elevation requirements.

[0046] Specifically, the construction process is as follows:

[0047] Construction preparation

[0048] 1) After the first section of the column pier is poured, two φ110 holes and two φ30 holes need to be reserved for each concrete core.

[0049] 2) Inspection of all components of the construction platform upon arrival at the site.

[0050] 3) Platform assembly machinery and equipment arrive on site.

[0051] Platform assembly

[0052] 1) Assemble the platform using a 25-ton truck crane;

[0053] 2) The walkway slabs and retaining structure are unloaded using a 25-ton truck crane and installed manually. Before installing the walkway slabs, retaining blocks (channel steel) are welded onto the platform, and the walkway slabs are laid manually. The retaining structure is divided into inner and outer retaining structures. First, the uprights or poles are welded, then the lifeline of the inner retaining structure is connected, and then the horizontal bars and safety nets of the outer retaining structure are installed.

[0054] 3) Install the lifting device 2 using a 25-ton truck crane. First, pass the channel steel 21 of the spreader beam through the top (column head) steel bar of the pier 4. Place a 400X400X20mm pad 23 between the column head and the spreader beam. Clamp the two channel steels 21 with bolts to the main reinforcement of the column, and hang electric hoists 22 at both ends.

[0055] Try to improve

[0056] 1) Hook the electric hoist 22 onto the lifting lug 11 of the platform body 1 below. Check if the pier 4 is loose from the platform. Only if it is normal can you test lift. During the test lift, pay attention to "listening" and "watching". If any abnormality occurs, stop immediately, find out the cause and solve the problem before continuing to lift. Stop lifting 500mm off the ground and stop for 30 minutes. Observe if there is any slippage. The lifting process is as follows. Figure 8 As shown,

[0057] 2) Lift the cage to 1700mm off the ground and stop. Install the hanging cage 3 and place the through rod, support base 6, and jack 7 into the hanging cage 3.

[0058] Platform upgrade in place

[0059] 1) After the platform body 1 is lifted into place, a construction tower ladder 5 is set up on one side for construction personnel to go up and down the platform.

[0060] 2) Once the platform is in place, manually install the core rod and support seat 6 using a 1-ton guide chain, and tighten the support seat 6 with precision rolled threaded steel 43 to make it fit tightly against the pier column 4.

[0061] Adjust platform height

[0062] A 50-ton jack 7 is placed on each of the four support seats 6. The height of the platform body 1 is adjusted by the jack 7 to meet the formwork elevation requirements.

[0063] Handover of construction

[0064] 1) Remove column head lifting mechanism device 2 and carry out steel reinforcement, formwork and concrete construction.

[0065] 2) For the construction of the next cover (tie) beam, only the mechanism device 2 needs to be installed at the column head. After the locking of the through rod and other components is released, it can be lifted without repeating the assembly of the platform.

[0066] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A construction platform for pier bent cap without crane, comprising a lifting device (2) and a platform body (1), characterized in that, Also include: Hang cage (3), set in the lower part of the platform body (1), and with the pier (4) arranged corresponding; Support assembly, located in the side of the hanging cage (3) close to the pier (4), in use, it is connected with the through rod on the pier (4), and the through rod is used as the support point to support the platform body (1); Elevation adjustment member, fixedly arranged on the top of the support assembly, and connected with the platform body (1), used for adjusting the elevation of the platform body (1).

2. The pier bent craneless construction platform of claim 1 wherein, The support assembly is a support seat (6), which comprises: The bayonet part (61) is clamped on the first through rod (41); The perforated part (62) is located above the bayonet part (61), and in use, the second through rod (42) passes through the perforated part (62); The support part (63) is arranged above the perforated part (62) and extends into the "┌” shape in the hanging cage (3), used for supporting the elevation adjustment member.

3. The pier bent craneless construction platform of claim 1 wherein, The hanging cage (3) is arranged with a plurality of horizontal rods (31) in the vertical direction, and the plurality of horizontal rods (31) form a ladder for entering and leaving the hanging cage (3).

4. The pier bent craneless construction platform of claim 1 wherein, The elevation adjustment member is a jack (7).

5. The pier bent craneless construction platform of claim 1 wherein, The lifting device (2) comprises: The carrying beam is fixed on the top of the pier (4); The electric hoist (22) is arranged on the carrying beam and connected with the platform body (1).

6. The pier bent craneless construction platform of claim 5 wherein, The carrying beam comprises two symmetrical channel steels (21), and the two channel steels (21) are connected by bolts and clamp the main reinforcement of the pier (4).

7. The column cap no-crane construction platform according to claim 5 or 6, wherein, The lower part of the carrying beam is provided with a pad (23).

8. The pier bent craneless construction platform of claim 5 wherein, The carrying beam is deflected along the circumference of the pier (4), so that the carrying beam is arranged obliquely.

Images