CN214143728U - Steel waist beam structure - Google Patents

Abstract

The utility model provides a steel waist rail structure, includes channel-section steel, cushion, anchor backing plate, anchor rope, two the channel-section steel sets up dorsad, and the anchor backing plate passes through bolted connection in the both sides of the channel-section steel that two dorsad set up, and the cushion setting is between the channel-section steel that two dorsad set up and through bolt with two sections channel-section steel transverse connection, and the anchor rope passes through and passes the bundle hole of wearing on two anchor backing plates between the channel-section steel that two dorsad set up, and the anchor rope passes through the prestressing force of stretch-draw equipment and stretches out and draw, makes the waist rail of compriseing the channel-section steel hug closely on strutting the pile wall. The utility model has the advantages that: 1) welding and cutting operations are avoided in the whole waist rail installation process, the workload is reduced, and the construction efficiency is improved. 2) The waist rail structure can be assembled, spliced and disassembled repeatedly, is flexible to use and can be used in a turnover way. 3) Compared with a concrete waist beam, the double-spliced type steel waist beam reduces wet operation construction, improves construction efficiency and quickens construction progress.

Description

Steel waist beam structure

Technical Field

The utility model relates to a construction technical field especially relates to a steel waist roof beam structure.

Background

With the development of urban construction, the excavation of the foundation pit tends to be more and more advanced and large-scale, and the design and construction of the foundation pit support ensure the safety of all supporting structures in the construction process, namely effectively controlling a deformation mechanism and surrounding soil bodies, saving cost, facilitating construction, shortening construction period and achieving turnover as much as possible. At present, foundation pit supporting modes are also diversified, if the cost is lower, modes of combining a steel plate pile, a steel pipe pile and an anchor rod are adopted, the two supporting modes need the waist beam for supporting, and the construction method of the conventional waist beam is as follows: the cast-in-place concrete waist beam or the welded channel steel waist beam is adopted for supporting, the cast-in-place concrete waist beam needs to be subjected to on-site wet operation, the construction is complex, the maintenance time is long, and the construction speed is seriously influenced. When the channel steel waist beam is welded, the channel steel is welded into an integral structure and then is perforated and anchored with a soil body, but the channel steel waist beam adopts a welding mode, a large amount of welding operation is needed during installation and connection, cutting and segmentation are needed during dismantling, a lot of engineering quantity is increased, construction speed is influenced, and materials and labor are wasted.

How to ensure the safety, reliability, convenient construction and cost saving of the supporting waist beam is a problem which needs to be solved during the deep foundation pit supporting construction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel waist rail structure, waist rail structure is safe and reliable both, and the cost is practiced thrift in the welding operation when reducing the connection again. After the foundation pit support is used, the profile steel waist beam can be disassembled without damage, maintenance is carried out, and the profile steel waist beam is applied to the next foundation pit support project at any time and is recycled for multiple times.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a steel waist rail structure, includes channel-section steel, cushion, anchor backing plate, anchor rope, two the channel-section steel sets up dorsad, the anchor backing plate passes through bolted connection in the both sides of the channel-section steel that two dorsad set up, the cushion sets up between the channel-section steel that two dorsad set up and through the bolt with two sections channel-section steel transverse connection, the anchor rope passes through and passes the bundle hole of wearing on two anchor backing plates between the channel-section steel that two dorsad set up, and the anchor rope is opened through tensioning equipment prestressing force and is drawn, makes the waist rail of constituteing by the channel-section steel hug closely on supporting pile.

And a base plate is also connected to the mounting position of the cushion block and the groove-shaped inner bottom surface of the channel steel.

Still include the stiffening rib board, the stiffening rib board leads to bolted connection in the notch of channel-section steel, is equipped with the lug on the stiffening rib board in the channel-section steel notch of one side.

Compared with the prior art, the beneficial effects of the utility model are that:

1) welding and cutting operations are avoided in the whole waist rail installation process, the workload is reduced, and the construction efficiency is improved.

2) The waist rail structure can be assembled, spliced and disassembled repeatedly, is flexible to use and can be used in a turnover way.

3) Compared with a concrete waist beam, the double-spliced type steel waist beam reduces wet operation construction, improves construction efficiency, accelerates construction progress, and obtains immeasurable economic benefit and market promotion value.

Drawings

Fig. 1 is a front schematic view of the present invention.

FIG. 2 is a schematic view of a stiffening rib.

Fig. 3 is a schematic view of a shim plate.

Fig. 4 is a schematic view of an anchor pad.

Fig. 5 is a schematic cross-sectional view of the anchoring portion of fig. 1A-a.

Fig. 6 is a schematic sectional view of the joint portion of fig. 1B-B.

In the figure: 1-channel steel, 2-backing plate, 3-cushion block, 4-bolt, 5-upper stiffening rib plate, 6-lifting lug, 7-lower stiffening rib plate, 8-rear anchoring backing plate, 9-front anchoring backing plate, 10-anchor cable and 11-tensioning equipment.

Detailed Description

The present invention will be described in detail below, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1-6, a waist-beam structure comprises channel steel 1, cushion block 3, anchor backing plates (back anchor backing plate 8, front anchor backing plate 9) and anchor cable 10, wherein the channel steel 1 is arranged in a reverse direction, the anchor backing plates are connected with two sides of the channel steel 1 arranged in a reverse direction through bolts, the cushion block 3 is arranged between the two channel steel 1 arranged in a reverse direction and is used for transversely connecting the two channel steel 1 through bolts, the anchor cable 10 passes through the two channel steel 1 arranged in a reverse direction and passes through the beam penetrating holes in the two anchor backing plates (the back anchor backing plate 8 and the front anchor backing plate 9), and the anchor cable 10 is tensioned through the prestress of tensioning equipment, so that the waist beam formed by the channel steel 1 is tightly attached to the supporting pile wall.

And a backing plate 2 is also connected to the mounting position of the cushion block 3 and the groove-shaped inner bottom surface of the channel steel 1.

Still include stiffening rib board (go up stiffening rib board 5, lower stiffening rib board 7), the stiffening rib board leads to bolted connection in channel-section steel 1's notch, is equipped with lug 6 on the stiffening rib board (going up stiffening rib board 5) of 1 notch mouths of channel-section steel of one side.

The utility model discloses a steel waist rail structure comprises waist rail main part, coupling part, anchor part three. The waist rail main part is the two channel steel 1 back to back of the same specification about the upper and lower two and connects into the fixed two piece together formula structure that forms, and as the main bearing structure of waist rail, each tip of channel-section steel 1 sets up 4 and corresponds the bolt hole, and every channel-section steel 1 sets up 4 bolt holes at the anchor position equally.

The connecting part consists of a channel steel joint with a bolt hole, a base plate 2, a cushion block 3 and a bolt, the lower base plate, the lower channel steel, the cushion block 3, the upper channel steel and the upper base plate sequentially penetrate through the two parts of waist beams to be connected by the bolt, and the two parts of waist beams are connected into a whole by fixing through nuts.

The anchoring part consists of a front anchoring backing plate 9, a rear anchoring backing plate 8, upper and lower stiffening rib plates and bolts. Set up the bolt hole and wear the bundle hole on preceding anchor backing plate 9, the back anchor backing plate 8, go up stiffener 5 upper portion and set up lug 6, through around anchor backing plate, upper and lower stiffener and bolt with two channel-section steel 1 from top to bottom reliably connect, guarantee the wholeness of waist rail.

Referring to fig. 2, the upper stiffening rib plate 5 and the lower stiffening rib plate 7 are H-shaped, bolt holes are formed in flange plates of the stiffening rib plates, and lifting lugs 6 are arranged on the upper stiffening rib plate 5. The bolt 4 is a hexagon head bolt of M20 × 100.

Channel-section steel 1 sets up the bolt hole at every link, arranges the bolt hole on backing plate 2, requires that the bolt hole on backing plate 2 and the bolt hole of channel-section steel 1 tip can correspond the coincidence, arranges the bolt hole on the 3 planes of cushion, requires that the bolt hole on cushion 3 corresponds with the bolt hole on channel-section steel 1 tip and the backing plate 2 and coincide.

The anchor cable 10 is prestressed and tensioned by the tensioning equipment 11, so that the waist beam is tightly attached to the wall of the supporting pile, and fastening is well performed. After the foundation pit construction is finished, the waist rail can be disassembled in a segmented and nondestructive mode, maintenance is carried out, and classified stacking is carried out.

As shown in FIG. 3, the shim plate 2 is a 200mm by 400mm thick steel plate 9mm thick with a bolt hole pitch of 80 mm.

As shown in fig. 4, the front anchor shim plate 9 and the rear anchor shim plate 8 are steel plates 9mm thick 200mm × 230 mm.

The utility model discloses a theory of operation is: the two channel steel 1 are in back-to-back mode, the two channel steel 1 are fixed through the front anchoring base plate 9, the rear anchoring base plate 8, the upper stiffening rib plate 5 and the lower stiffening rib plate 7 and bolts 4 at corresponding bolt holes to form a segmented waist beam, the base plate 2, the channel steel 1 and the cushion block 3 are fixed at bolt hole positions at the end part of the waist beam through the two sections of waist beams needing to be connected through the bolts 4, the two sections of waist beams are integrated, and the rigidity and integrity of the sections of waist beams are guaranteed. And hoisting the sectional waist beam to the anchor cable 10 by using a crane and a steel wire rope through the lifting lug 6, and penetrating through the anchor cable 10 for fixing. The anchor cable 10 is prestressed and tensioned by the tensioning equipment 11, so that the waist beam is tightly attached to the wall of the supporting pile, and fastening is well performed. After the foundation pit construction is finished, the waist rail can be disassembled in a segmented and nondestructive mode, maintenance is carried out, and classified stacking is carried out.

A construction method of a steel waist beam structure comprises the following steps:

1) and excavating the earthwork to the position 600-800mm below the waist beam installation elevation.

According to the engineering elevation, the anchor hole position is accurately measured and placed on the slope according to the design, and the hole position error is not more than +/-20 mm; drilling holes at the positions of the anchor cables, installing the anchor cables, grouting and maintaining for 7d, wherein the reserved leakage length of the anchor cables is 1.5 m.

2) During grouting and maintenance of the anchor cable 10, the two channel steel 1 are fixed by bolts at corresponding bolt holes through the anchoring backing plate and the stiffening rib plates in a back-to-back mode to form the segmented wale, and the segmented wale is fixed into the integral wale through the backing plate 2, the cushion block 3 and the bolts.

3) After the grouting maintenance period is finished, the whole waist beam penetrates through the anchor cable 10 through the lifting lug 6 by using a crane and a steel wire rope for fixing, and the waist beam is installed and kept horizontal.

4) And installing a tensioning device 10, tensioning, pre-tensioning the anchor cable 10 to an axial bearing capacity design value, keeping the load for not less than 5 minutes, and then retreating to 75% -90% of the designed axial tension of the anchor cable 10 for locking.

5) And (3) removing the tensioning equipment 11, shearing the anchor cable leaking outside the end part, enabling the anchor cable 10 to extend out of the anchor device at the end part and leak 280-320mm, and coating asphalt on the anchor head of the anchor rod for corrosion prevention.

6) And (5) excavating the lower part and carrying out other operation construction.

7) And after the foundation pit construction is finished, disassembling the waist rail in sections without damage, maintaining, and stacking in a classified manner.

Claims (3)

1. The utility model provides a steel waist rail structure, its characterized in that, includes channel-section steel, cushion, anchor backing plate, anchor rope, two the channel-section steel sets up dorsad, the anchor backing plate passes through bolted connection in the both sides of the channel-section steel that two dorsad set up, the cushion sets up between the channel-section steel that two dorsad set up and through bolt with two sections channel-section steel transverse connection, the anchor rope passes through and passes the bundle hole of wearing on two anchor backing plates between the channel-section steel that two dorsad set up, and the anchor rope passes through the prestressing force of stretch-draw equipment and opens and draw, makes the waist rail of compriseing the channel-section steel hug closely on the supporting pile wall.

2. The steel waist beam structure according to claim 1, wherein a backing plate is further connected to the groove-shaped inner bottom surface of the channel steel at the installation position of the cushion block.

3. The steel waist beam structure according to claim 1, further comprising a stiffening rib plate, wherein the stiffening rib plate is connected in the notch of the channel steel through a bolt, and a lifting lug is arranged on the stiffening rib plate in the notch of the channel steel on one side.

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