CN117626998B - Buckle type steel support mounting device applied to foundation pit and working method thereof - Google Patents
Buckle type steel support mounting device applied to foundation pit and working method thereof Download PDFInfo
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- CN117626998B CN117626998B CN202410103357.6A CN202410103357A CN117626998B CN 117626998 B CN117626998 B CN 117626998B CN 202410103357 A CN202410103357 A CN 202410103357A CN 117626998 B CN117626998 B CN 117626998B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 213
- 239000010959 steel Substances 0.000 title claims abstract description 213
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 238000010276 construction Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000009412 basement excavation Methods 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention belongs to the technical field of foundation pit construction, and discloses a buckle type steel support mounting device applied to a foundation pit and a working method thereof, wherein the mounting device comprises a hoisting mechanism and a limiting rotating mechanism; the buckle type steel support comprises a plurality of H-shaped steel sections which are hinged with each other; the limiting rotating mechanism is arranged on the excavation surface in the foundation pit and comprises two lifting type stand columns, a motor and a rotating deflector rod, wherein the two lifting type stand columns are respectively arranged below two ends of the middle H-shaped steel section, the rotating deflector rod is connected onto an output shaft of the motor in a key manner, and the upper end of the output shaft is correspondingly inserted into a groove on the lower surface of the end part of the H-shaped steel section for limiting. The invention has the advantages that: the steel support connected by the foldable buckle can be transported and hoisted in a folded state, and can be rapidly unfolded and buckled during installation, so that rapid installation is realized; through setting up spacing rotary mechanism in the H shaped steel section both ends in the middle part, under the spacing circumstances of middle part H shaped steel section, can further stir the H shaped steel section of both sides and expand.
Description
Technical Field
The invention belongs to the technical field of foundation pit construction, and particularly relates to a buckle type steel support mounting device applied to a foundation pit and a working method thereof.
Background
The foundation pit supporting system comprises a reinforced concrete supporting system and a steel structure supporting system.
The traditional reinforced concrete support system needs longer manufacturing and maintenance time, and the support function cannot be immediately exerted after manufacturing; the concrete support is removed with large workload, serious dust pollution, large vibration and large noise, and the material can not be reused, which does not meet the current green construction requirement.
The steel structure supporting system can well overcome the defects of the reinforced concrete supporting system, and moreover, the steel structure supporting system can apply pre-pressure through the hydraulic jack, monitor and adjust supporting force in real time, and realize strict control of foundation pit displacement so as to meet the strict requirements of subways, important pipelines and the like around the foundation pit on the excavation environmental effect of the foundation pit. The steel structure supporting system consists of horizontal steel/steel pipe support, steel upright posts and enclosing purlin.
The joint form of the horizontal steel pipe support is provided with 2 types of welding and bolting, and the bolting is convenient and quick to assemble on site without welding residual stress problem, so that the joint form is quite common in practical application. The joint form of the horizontal steel support is also welded and bolted 2.
The joint connection mode of horizontal shaped steel/steel pipe support need install again after the job site is assembled, has the problem that the efficiency of construction is low, and under the narrow and small circumstances in foundation ditch space, the problem that the difficult construction of space restriction can exist in the integral hoisting.
Disclosure of Invention
According to the defects of the prior art, the invention provides the buckle type steel support installation device applied to the foundation pit and the working method thereof, wherein the steel support installation device is used for connecting all H-shaped steel sections in a hinging and buckling mode so as to facilitate folding in the transportation hoisting process, hoisting of the buckle type steel support is realized through a hoisting mechanism, limiting of the middle H-shaped steel section and shifting and unfolding of the H-shaped steel sections on two sides are realized through arranging a limiting rotating mechanism on the excavation surface of the foundation pit, and the whole buckle type steel support is formed by rapid unfolding in the installation process so as to adapt to a narrow foundation pit construction space and improve the installation speed.
The invention is realized by the following technical scheme:
the utility model provides a buckle formula steel support installation device that is applied to in foundation ditch, buckle formula steel support installation device includes hoisting mechanism and spacing rotary mechanism;
the buckle type steel support comprises a plurality of H-shaped steel sections which are mutually hinged, wherein a hinge rotating shaft is adopted to hinge one side face of each end of each adjacent H-shaped steel section, and the other side face of each end of each adjacent H-shaped steel section is provided with a male connector at one end and a female connector at the other end, and the male connectors are inserted into the female connectors in a socket manner to form buckle connection;
the hoisting mechanism is a crane for hoisting the buckle-type steel support and is arranged on the ground at one side of the foundation pit;
the limiting rotating mechanism is arranged on the excavation surface in the foundation pit and comprises two lifting type stand columns, a motor arranged at the top of the lifting type stand columns and a rotating deflector rod fixed on an output shaft of the motor, wherein the two lifting type stand columns are arranged below two ends of the H-shaped steel section which is arranged between the two clamping type steel supports, the rotating deflector rod comprises a deflector rod connected to the output shaft of the motor through a key and a traction column fixed at the end part of the deflector rod, and the upper end of the output shaft is correspondingly inserted into a groove on the lower surface of the end part of the H-shaped steel section for limiting.
The H-shaped steel section comprises two parallel flange plates and a web plate vertically welded between the two flange plates, and the flange plates are an upper flange plate and a lower flange plate respectively; and a plurality of lifting lugs are arranged on the upper surface of the upper flange plate at intervals so as to be used for lifting by the lifting mechanism.
The hinge rotating shaft comprises a rotating shaft, an upper hinge plate and a lower hinge plate, wherein the upper hinge plate and the lower hinge plate are respectively arranged at two sides of the rotating shaft, the upper hinge plate is welded on an upper flange plate of the H-shaped steel section at one side, and the lower hinge plate is welded on a lower flange plate of the H-shaped steel section at the other side; the height of the upper hinge plate and the height of the lower hinge plate are 1/2 of the height of the H-shaped steel section.
The male connector comprises a sealing plate welded on the end face of the H-shaped steel section far away from one side of the hinge rotating shaft and a vertical rod vertically welded on the sealing plate, two barb-shaped inclined rods are symmetrically welded at the front end of the vertical rod, and the vertical rod and the two inclined rods form the male connector in an iron anchor shape together;
the female interface is formed by encircling a web plate, an end plate, a side plate, an upper flange plate and a lower flange plate, wherein the side plate is welded between the upper flange plate and the lower flange plate which are far away from one side of a hinge rotating shaft, and four side edges of the end plate are respectively welded with the web plate, the side plate, the upper flange plate and the lower flange plate; the side plates are respectively provided with spring limiting mechanisms which point to the female connectors at positions close to the end faces of the H-shaped steel sections and the positions close to the end faces of the H-shaped steel sections, each spring limiting mechanism comprises a channel, a compression spring and a translation stop block, one end of each compression spring is fixed in each channel, the other end of each compression spring is fixed on each translation stop block, and each translation stop block translates along each channel under the action of resilience force of each compression spring or extrusion action of each male connector.
In the male connector, the width between the two inclined rod ends is the distance between the web plate and the side plate, and the vertical distance from the front end of the vertical rod to the inclined rod end is the vertical distance between the end plate and the translation stop block.
The outer end of the translation stop block is provided with an arc chamfer.
The end part of the H-shaped steel section at one end of the buckle-type steel support is provided with a bolt connecting seat so as to be connected with the enclosing purlin, and the bolt connecting seat is welded on the upper flange plate and the lower flange plate respectively; a hydraulic servo oil cylinder is arranged between the end part of the H-shaped steel section at the other end of the buckle type steel support and the surrounding purlin, a rear seat of the hydraulic servo oil cylinder is connected with the surrounding purlin, and the front end of the hydraulic servo oil cylinder is connected with the end part of the H-shaped steel section.
The upper surface of the upper flange plate is provided with a plurality of connecting pieces with through holes at intervals, each H-shaped steel section is in a mutually parallel folding state, and ropes are arranged between the through holes of the connecting pieces in a penetrating mode between the adjacent H-shaped steel sections to be bound and fixed.
A construction method involving any one of the snap-in steel support mounting devices applied in a foundation pit, the construction method comprising the steps of:
s1: rotating and adjusting all H-shaped steel sections in the buckle-type steel support to be in a minimum folding state parallel to each other, temporarily locking all H-shaped steel sections, and hoisting the buckle-type steel support in the minimum folding state to a position above a position to be installed in a foundation pit by using a hoisting mechanism after the buckle-type steel support is transported to a construction site, wherein the hoisting mechanism is used for hoisting the H-shaped steel sections positioned in the middle section of the buckle-type steel support;
s2: respectively erecting a limiting rotating mechanism below two ends of the hoisted H-shaped steel section which is arranged in the middle, wherein the limiting rotating mechanism comprises a lifting upright post, a motor arranged at the top of the lifting upright post and a rotating deflector rod fixed on an output shaft of the motor; the limiting and rotating mechanism is supported on an excavation surface in the foundation pit and correspondingly ascends the top end of the motor output shaft to a groove formed in the lower surface of the end head of the H-shaped steel section through the lifting upright post so as to limit the centered H-shaped steel section;
the motor drives the rotary deflector rod to rotate, and the rotary deflector rod dials the H-shaped steel sections positioned at the side parts to rotate, so that the H-shaped steel sections in the two-side folding state are outwards turned, and a male connector between the adjacent H-shaped steel sections is inserted into a female connector and locked, so that the buckle-type steel support positioned on the same straight line is formed; afterwards, the limiting and rotating mechanism is removed;
s3: the hoisting mechanism is used for lowering the whole buckle type steel support to the height position to be installed, one end of the buckle type steel support is connected and fixed with the enclosing purlin in the foundation pit, and a hydraulic servo oil cylinder is erected between the other end of the buckle type steel support and the enclosing purlin in the foundation pit for connection and fixation, so that two ends of the buckle type steel support are respectively connected and fixed with two side wall purlins in the foundation pit;
s4: and releasing the hoisting of the hoisting mechanism to the buckle type steel support, and carrying out hoisting operation of the next group of buckle type steel support.
The invention has the advantages that:
(1) The traditional horizontal steel support connected by the bolts is changed into the steel support connected by the foldable buckle, so that the steel support can be transported and hoisted in a folded state, the transportation space is saved, the steel support is suitable for the construction space of a narrow foundation pit, and the steel support in the folded state can be rapidly unfolded and buckled in the hoisting construction process, so that rapid installation is realized;
(2) The adjacent H-shaped steel sections are mutually inserted and mounted through the male connector in the shape of an iron anchor and the female connector with the spring limiting mechanism, so that the inconvenience that the adjacent H-shaped steel sections are connected through nuts in the past is avoided;
(3) Through setting up spacing rotary mechanism in the H shaped steel section both ends in the middle part, under the spacing circumstances of middle part H shaped steel section, can further stir the H shaped steel section of both sides and expand.
Drawings
FIG. 1 is a schematic view of a snap-in steel support in a folded state according to the present invention;
FIG. 2 is a schematic view of the snap-in steel support in its unfolded state according to the invention;
FIG. 3 is a schematic view of a snap-in steel support of the present invention with deployment and locking completed;
FIG. 4 is a partial schematic view of the ends of adjacent H-section steel segments of the present invention in an unbuckled state;
FIG. 5 is a schematic view of a portion of an end of an adjacent H-section in contact according to the present invention;
FIG. 6 is a partial schematic view of the ends of adjacent H-section steel segments in the completed fastening condition according to the present invention;
FIG. 7 is a side view of the hinge shaft of the present invention disposed between adjacent H-section ends;
fig. 8 is a schematic view showing an operation state of the snap-in type steel support mounting device according to the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings, to facilitate understanding by those skilled in the art:
as shown in fig. 1-8, the labels in the figures are respectively: h-section steel section 1, web 11, upper flange plate 12, lower flange plate 13, female interface 2, side plate 21, end plate 22, spring limiting mechanism 23, channel 231, compression spring 232, translation stop 233, male connector 3, vertical rod 31, diagonal rod 32, seal plate 33, enclosing purlin 4, hydraulic servo cylinder 5, hinge shaft 6, shaft 61, upper hinge plate 62, lower hinge plate 63, lifting lug 7, connecting piece 8, limiting rotation mechanism 9, lifting column 91, motor 92, output shaft 93, deflector 94, and traction column 95.
Examples: as shown in fig. 1-8, the present embodiment specifically relates to a buckle-type steel support installation device applied in a foundation pit and a construction method thereof, wherein two ends of the buckle-type steel support mentioned in the present embodiment are fixedly connected with an enclosing purlin 4 on a foundation pit enclosure structure, the buckle-type steel support comprises a plurality of H-shaped steel sections 1 hinged with each other, specifically, hinge rotating shafts 6 for hinging and male connectors 3 and female connectors 2 for fastening are arranged between the ends of adjacent H-shaped steel sections 1, the hinge rotating shafts 6 are arranged on one side surface of the ends, and the female connectors 2/male connectors 3 are arranged on the other side surface of the ends. Whereas the mounting means for mounting the aforementioned snap-in steel support in this embodiment comprises a hoisting mechanism and a limit rotation mechanism 9. The hoisting mechanism is a crane for hoisting the buckle type steel support and is arranged on the ground at one side of the foundation pit. And the limiting rotating mechanism is arranged on the excavation surface in the foundation pit and used for limiting the H-shaped steel section 1 in the middle, and simultaneously shifting the H-shaped steel sections 1 at the two sides to spread outwards.
As shown in fig. 1 to 7, the H-section 1 comprises two parallel flanges and a web 11 vertically welded between the two flanges, the flanges are an upper flange 12 and a lower flange 13, respectively, the working posture of the H-section 1 is that the web 11 maintains a vertical posture, and the upper flange 12 and the lower flange 13 maintain a horizontal posture. In this embodiment, the snap-in steel support consists of three H-section steel segments 1 hinged to each other.
As shown in fig. 1-7, the hinge shaft 6 is disposed between the ends of adjacent H-section steel segments 1, specifically on one side of the i-section steel. The hinge pivot 6 comprises pivot 61, upper hinge plate 62 and lower hinge plate 63, and pivot 61 is located between the end of adjacent H shaped steel section 1, and upper flange portion welding of upper hinge plate 62 is on the upper flange plate 12 of H shaped steel section 1, and the lower flange portion welding of lower hinge plate 63 is on the lower flange plate 13 of H shaped steel section 1, and what needs to be explained, and the height of upper hinge plate 62 and the height of lower hinge plate 63 are half of H shaped steel section 1, and the purpose that sets up like this is when folding adjacent H shaped steel section 1 to minimum, can not take place the mutual collision and then influence the upset route between upper hinge plate 62 and the lower hinge plate 63 in the upset in-process. In order to ensure the welding strength of the hinge plates, 1-2 stiffening ribs may be welded to the ends of the H-section steel 1 (i.e., to the space surrounded by the upper flange plate 12, the lower flange plate 13, and the web 11), thereby increasing the welding area of the upper hinge plate 62 and the lower hinge plate 63.
As shown in fig. 1 to 7, the female joint 2 is disposed on one end between the adjacent H-section steel segments 1, the male joint 3 is disposed on the other end between the adjacent H-section steel segments 1, and when the ends of the adjacent H-section steel segments 1 rotate to the same axis, the male joint 3 is inserted into the female joint 2 to form a fastening connection.
As shown in fig. 1-6, the male connector 3 is disposed on one side of the end of the H-section 1, which is far away from the hinge shaft 6, and includes a vertical rod 31, an inclined rod 32 and a sealing plate 33. Wherein, shrouding 33 welds on the end of H shaped steel section 1 and is located the web 11 and keep away from one side of hinge pivot 6 specifically, and perpendicular pole 31 welds perpendicularly on shrouding 33, and two diagonal rods 32 symmetrical welding are in the front end of perpendicular pole 31 and are barb-like distribution, and two diagonal rods 32 and perpendicular pole 31 constitute together and are the public joint 3 of iron anchor form.
As shown in fig. 4-7, the female connector 2 is used for socket joint and fastening of the male connector 3, the female connector 2 is formed by enclosing a web 11, an end plate 22, a side plate 21, an upper flange plate 12 and a lower flange plate 13, wherein the end side plate 21 is welded to the side edges of the upper flange plate 12 and the side edges of the lower flange plate 13 on one side far away from the hinge rotating shaft 6, and four side edges of the end plate 22 are respectively welded with the web 11, the side plate 21, the side edges of the upper flange plate 12 and the lower flange plate 13. The side plate 21 is provided with a spring limiting mechanism 23 near the end position, and similarly, the web plate 11 is also provided with a spring limiting mechanism 23 near the end position, the two spring limiting mechanisms 23 are symmetrically arranged and are both directed into the socket cavity of the female interface 2, the spring limiting mechanism 23 comprises a channel 231, a compression spring 232 and a translation stop block 233, the channel 231 is transversely arranged and is used as a translation guide channel of the translation stop block 233, the compression spring 232 is arranged in the channel 231, one end of the compression spring 232 is fixed at the tail end of the channel 231, the other end of the compression spring is fixed on the translation stop block 233, and when the translation stop block 233 and the compression spring 232 are in an initial state of not being acted by external force, the front end of the translation stop block 233 protrudes out of the side plate 21 and the web plate 11; and the translation block 233 and the compression spring 232 are pressed by external force, the translation block 233 can be retracted into the channel 231. It should be noted that, the front end of the translation stopper 233 is provided with an arc chamfer, so that the diagonal rod 32 on the male connector 3 is easy to slide relatively when contacting with the diagonal rod.
As shown in fig. 4-7, the dimensions of the male connector 3 are adapted to the dimensions of the female connector 2, as follows: the length of the vertical rod 31 corresponds to the cavity depth of the female connector 2, and when the vertical rod 31 is fully inserted into the female connector 2, the front end of the vertical rod 31 is just abutted against the end plate 22; the width between the ends of the two diagonal rods 32 is consistent with the distance between the side plate 21 and the web 11, when the male connector 3 is fully inserted into the female connector 2, the two diagonal rods 32 are laterally contacted with the side plate 21 and the web 11, and the ends of the two diagonal rods 32 are just contacted with the two translation stoppers 233, which is equivalent to limiting the diagonal rods 32 by the two translation stoppers 233 to prevent the male connector 3 from backing out of the female connector 2.
As shown in fig. 8, in order to facilitate the lifting of the snap-in steel support, lifting lugs 7 are welded on the upper surface of each H-section 1, and in addition, in order to facilitate the interconnection between each H-section 1 in the folded state, a plurality of connectors 8 having through holes are welded on the upper surface of each H-section 1. When the H-section steel segments 1 are folded together, adjacent H-section steel segments 1 are connected into a whole by threading cables through the through holes of the connectors.
As shown in fig. 1-7, the end of the H-steel section 1 at one end of the snap-in steel support is provided with a bolt connecting seat for connecting with the enclosing purlin 4, and the bolt connecting seat is welded on the upper flange plate 12 and the lower flange plate 13 respectively; a hydraulic servo oil cylinder 5 is arranged between the end part of the H-shaped steel section 1 at the other end of the buckle type steel support and the enclosing purlin 4, the rear seat of the hydraulic servo oil cylinder 5 is connected with the enclosing purlin 4, and the front end of the hydraulic servo oil cylinder 5 is connected with the end part of the H-shaped steel section 1. The hydraulic servo oil cylinder 5 can apply circumferential pressure to the whole buckling type steel support, so that the buckling type steel support can effectively support the enclosing structure at the edge of the foundation pit through the enclosing purlin 4, and lateral retaining force is provided.
As shown in fig. 1-8, the limiting and rotating mechanism 9 is arranged on the excavation surface in the foundation pit, and comprises two lifting upright posts 91, a motor 92 arranged at the top of the lifting upright posts 91 and a rotating deflector rod fixed on an output shaft 93 of the motor 92, wherein the two lifting upright posts 91 are respectively arranged below two ends of the middle H-shaped steel section 1, the rotating deflector rod comprises a deflector rod 94 connected with the output shaft of the motor in a key way and a traction column 95 fixed at the end part of the deflector rod 94, and the traction column 95 is cone-shaped so as to be beneficial to being inserted between gaps of adjacent attached H-shaped steel sections 1 and deflector; limiting grooves are respectively formed below two ends of the H-shaped steel section 1 in the middle, and the output shaft 93 of the motor 92 correspondingly jacks up in the grooves, so that the limitation of the H-shaped steel section 1 in the middle is formed, and the rotation of the output shaft 93 is not influenced because the H-shaped steel section 1 is lifted. And the traction column 95 on the deflector rod 94 is not influenced by too much gravity when the H-shaped steel sections 1 on the two sides are deflector-rotated.
As shown in fig. 1 to 8, the construction method of the snap-in steel support installation device applied to the foundation pit in the embodiment includes the following steps:
s1: as shown in fig. 1, each H-section 1 in the snap-in steel support is rotationally adjusted to a minimum folded state parallel to each other and temporary locking is performed between each H-section 1; the temporary locking means that a cable is penetrated in the through hole of the connecting piece 8 on the adjacent H-shaped steel section 1 to fix and attach a plurality of H-shaped steel sections together, so that the H-shaped steel section is integrated and is in a minimum length state, and is convenient for transportation.
After the H-shaped steel section 1 in the folded state is transported to a construction site, the buckle-type steel support in the minimum folded state is lifted to the position above the position to be installed in the foundation pit by using the lifting mechanism, and it is to be noted that, as shown in fig. 1, in order to ensure the stability of the center of the structure during lifting, the lifting point of the crane is arranged on the centered H-shaped steel section 1, and the lifting mechanism is positioned at the edge of one side of the foundation pit.
S2: a limiting rotation mechanism 9 is respectively erected below two ends of the hoisted H-shaped steel section which is arranged in the middle, and the limiting rotation mechanism 9 comprises a lifting upright post 91, a motor 92 arranged at the top of the lifting upright post 91 and a rotation deflector rod fixed on an output shaft 93 of the motor 92; the limiting and rotating mechanism 9 is supported on the excavation surface in the foundation pit and correspondingly ascends the top end of an output shaft 93 of the motor 92 into a groove formed in the lower surface of the end of the H-shaped steel section 1 through the lifting upright post 91 so as to form the limiting of the centered H-shaped steel section 1; and at the same time, the pull post 95 of the shift lever 94 is inserted into the fitting gap between adjacent H-section steel segments 1.
The driving rod 94 is driven to rotate by the motor 92, the driving rod 94 drives the H-shaped steel sections 1 positioned at the side parts to rotate, so that the H-shaped steel sections 1 in the two-side folding state are outwards turned over, the male connector 3 between the adjacent H-shaped steel sections 1 is inserted into the female connector 2 and locked, and the buckle-type steel support positioned on the same straight line is formed; the limit rotation mechanism 9 is then removed.
As shown in fig. 1-6, during the rotation process of the H-section steel 1, the male joint 3 is gradually inserted into the female joint 2 between adjacent sections, two diagonal rods 32 on the male joint 3 are in contact with the translation stop blocks 233, and under the extrusion force of the diagonal rods 32, the translation stop blocks 233 compress the compression springs 232 inwards and retract gradually into the channels 231, so that the diagonal rods 32 gradually enter the cavity of the female joint 2, and it is required to say that in order to facilitate the sliding fit between the diagonal rods 32 and the outer ends of the translation stop blocks 233, chamfer rounding treatment is performed on the outer ends of the translation stop blocks 233; when the diagonal rod 32 completely enters the cavity of the female connector 2, the diagonal rod 32 is separated from contact with the translation stop block 233 and the compression of the diagonal rod is released, and the translation stop block 233 is reset and translated outwards again under the resilience force of the compression spring 232 to form the limit of the male connector 3. That is, when the male connector 3 is completely inserted into the female connector 2, it is limited in all directions by the two side wall surfaces, the front end surface, the top surface, the bottom surface and the translation stopper 233, so that stable connection is formed between the adjacent H-shaped steel segments 1, and the inconvenience that further fastening by bolts is required in the past is avoided.
S3: utilize hoisting mechanism to carry out translation adjustment to buckle formula steel support and descend this buckle formula steel support wholly to waiting to install high position, make the one end of buckle formula steel support and enclose purlin 4 in the foundation ditch and connect fixedly to erect a hydraulic servo cylinder 5 between the other end of buckle formula steel support and enclosing purlin 4 in the foundation ditch and connect fixedly, in order to enclose purlin 4 with the both ends of buckle formula steel support with the both sides in the foundation ditch respectively and connect fixedly.
S4: and lifting the buckle type steel support by the lifting mechanism, and carrying out lifting operation of the next group of buckle type steel supports.
The beneficial effects of this embodiment are:
(1) The traditional horizontal steel support connected by the bolts is changed into the steel support connected by the foldable buckle, so that the steel support can be transported and hoisted in a folded state, the transportation space is saved, the steel support is suitable for the construction space of a narrow foundation pit, and the steel support in the folded state can be rapidly unfolded and buckled in the hoisting construction process, so that rapid installation is realized;
(2) The adjacent H-shaped steel sections are mutually inserted and mounted through the male connector in the shape of an iron anchor and the female connector with the spring limiting mechanism, so that the inconvenience that the adjacent H-shaped steel sections are connected through nuts in the past is avoided;
(3) Through setting up spacing rotary mechanism in the H shaped steel section both ends in the middle part, under the spacing circumstances of middle part H shaped steel section, can further stir the H shaped steel section of both sides and expand.
Claims (6)
1. The buckle type steel support mounting device is applied to the foundation pit and is characterized by comprising a hoisting mechanism and a limiting rotating mechanism;
the buckle type steel support comprises a plurality of H-shaped steel sections which are mutually hinged, wherein a hinge rotating shaft is adopted to hinge one side face of each end of each adjacent H-shaped steel section, and the other side face of each end of each adjacent H-shaped steel section is provided with a male connector at one end and a female connector at the other end, and the male connectors are inserted into the female connectors in a socket manner to form buckle connection;
the hoisting mechanism is a crane for hoisting the buckle-type steel support and is arranged on the ground at one side of the foundation pit;
the limiting rotating mechanism is arranged on an excavation surface in a foundation pit and comprises two lifting type stand columns, a motor arranged at the top of the lifting type stand columns and a rotating deflector rod fixed on an output shaft of the motor, wherein the two lifting type stand columns are arranged below two ends of the H-shaped steel section which is arranged centrally by the buckle type steel support, the rotating deflector rod comprises a deflector rod which is connected to the output shaft of the motor by a key and a traction column fixed at the end part of the deflector rod, and the upper end of the output shaft is correspondingly inserted into a groove in the lower surface of the end part of the H-shaped steel section for limiting;
the H-shaped steel section comprises two parallel flange plates and a web plate vertically welded between the two flange plates, and the flange plates are an upper flange plate and a lower flange plate respectively; a plurality of lifting lugs are arranged on the upper surface of the upper flange plate at intervals for lifting by the lifting mechanism;
the hinge rotating shaft comprises a rotating shaft, an upper hinge plate and a lower hinge plate, wherein the upper hinge plate and the lower hinge plate are respectively arranged at two sides of the rotating shaft, the upper hinge plate is welded on an upper flange plate of the H-shaped steel section at one side, and the lower hinge plate is welded on a lower flange plate of the H-shaped steel section at the other side; the height of the upper hinge plate and the height of the lower hinge plate are 1/2 of the height of the H-shaped steel section;
the male connector comprises a sealing plate welded on the end face of the H-shaped steel section far away from one side of the hinge rotating shaft and a vertical rod vertically welded on the sealing plate, two barb-shaped inclined rods are symmetrically welded at the front end of the vertical rod, and the vertical rod and the two inclined rods form the male connector in an iron anchor shape together;
the female interface is formed by encircling a web plate, an end plate, a side plate, an upper flange plate and a lower flange plate, wherein the side plate is welded between the upper flange plate and the lower flange plate which are far away from one side of a hinge rotating shaft, and four side edges of the end plate are respectively welded with the web plate, the side plate, the upper flange plate and the lower flange plate; the side plates are respectively provided with spring limiting mechanisms which point to the female connectors at positions close to the end faces of the H-shaped steel sections and the positions close to the end faces of the H-shaped steel sections, each spring limiting mechanism comprises a channel, a compression spring and a translation stop block, one end of each compression spring is fixed in each channel, the other end of each compression spring is fixed on each translation stop block, and each translation stop block translates along each channel under the action of resilience force of each compression spring or extrusion action of each male connector.
2. The device of claim 1, wherein in the male connector, the width between the two diagonal ends is the distance between the web and the side plate, and the vertical distance from the front end of the vertical rod to the diagonal end is the vertical distance between the end plate and the translation stopper.
3. The snap-in steel support mounting device applied to a foundation pit according to claim 1, wherein the outer end of the translation stopper is provided with an arc chamfer.
4. The fastening type steel support installation device applied to the foundation pit according to claim 1, wherein a bolt connection seat is arranged at the end part of the H-shaped steel section at one end of the fastening type steel support so as to be connected with an enclosing purlin, and the bolt connection seat is welded on the upper flange plate and the lower flange plate respectively; a hydraulic servo oil cylinder is arranged between the end part of the H-shaped steel section at the other end of the buckle type steel support and the surrounding purlin, a rear seat of the hydraulic servo oil cylinder is connected with the surrounding purlin, and the front end of the hydraulic servo oil cylinder is connected with the end part of the H-shaped steel section.
5. The device for installing the buckle type steel support in the foundation pit according to claim 1, wherein a plurality of connecting pieces with through holes are arranged on the upper surface of the upper flange plate at intervals, each H-shaped steel section is in a mutually parallel folding state, and ropes are arranged between the through holes of the connecting pieces in a penetrating mode between the adjacent H-shaped steel sections to carry out bundling fixation.
6. A method of operation involving a snap-in steel support mounting device according to any one of claims 1-5 applied in a foundation pit, characterized in that the method of operation comprises the steps of:
s1: rotating and adjusting all H-shaped steel sections in the buckle-type steel support to be in a minimum folding state parallel to each other, temporarily locking all H-shaped steel sections, and hoisting the buckle-type steel support in the minimum folding state to a position above a position to be installed in a foundation pit by using a hoisting mechanism after the buckle-type steel support is transported to a construction site, wherein the hoisting mechanism is used for hoisting the H-shaped steel sections positioned in the middle section of the buckle-type steel support;
s2: respectively erecting a limiting rotating mechanism below two ends of the hoisted H-shaped steel section which is arranged in the middle, wherein the limiting rotating mechanism comprises a lifting upright post, a motor arranged at the top of the lifting upright post and a rotating deflector rod fixed on an output shaft of the motor; the limiting and rotating mechanism is supported on an excavation surface in the foundation pit and correspondingly ascends the top end of the motor output shaft to a groove formed in the lower surface of the end head of the H-shaped steel section through the lifting upright post so as to limit the centered H-shaped steel section;
the motor drives the rotary deflector rod to rotate, and the rotary deflector rod dials the H-shaped steel sections positioned at the side parts to rotate, so that the H-shaped steel sections in the two-side folding state are outwards turned, and a male connector between the adjacent H-shaped steel sections is inserted into a female connector and locked, so that the buckle-type steel support positioned on the same straight line is formed; afterwards, the limiting and rotating mechanism is removed;
s3: the hoisting mechanism is used for lowering the whole buckle type steel support to the height position to be installed, one end of the buckle type steel support is connected and fixed with the enclosing purlin in the foundation pit, and a hydraulic servo oil cylinder is erected between the other end of the buckle type steel support and the enclosing purlin in the foundation pit for connection and fixation, so that two ends of the buckle type steel support are respectively connected and fixed with two side wall purlins in the foundation pit;
s4: and releasing the hoisting of the hoisting mechanism to the buckle type steel support, and carrying out hoisting operation of the next group of buckle type steel support.
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| CN117626998B true CN117626998B (en) | 2024-04-02 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208201882U (en) * | 2018-03-14 | 2018-12-07 | 天津城建隧道股份有限公司 | A kind of narrow deep foundation pit construction steel support structure |
| CN111088799A (en) * | 2019-12-06 | 2020-05-01 | 中国建筑第八工程局有限公司 | Foundation pit steel support and mounting method thereof |
| CN112127369A (en) * | 2020-08-31 | 2020-12-25 | 中铁第四勘察设计院集团有限公司 | Fabricated foundation pit steel supporting structure and construction method thereof |
| CN216551972U (en) * | 2021-11-22 | 2022-05-17 | 中国十九冶集团有限公司 | Easy folding steel shotcrete of adjustable axial force |
| CN115163077A (en) * | 2022-08-26 | 2022-10-11 | 贵州省交通规划勘察设计研究院股份有限公司 | Adjustable profile steel supporting structure for shaft supporting and suspension assembly method |
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- 2024-01-25 CN CN202410103357.6A patent/CN117626998B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208201882U (en) * | 2018-03-14 | 2018-12-07 | 天津城建隧道股份有限公司 | A kind of narrow deep foundation pit construction steel support structure |
| CN111088799A (en) * | 2019-12-06 | 2020-05-01 | 中国建筑第八工程局有限公司 | Foundation pit steel support and mounting method thereof |
| CN112127369A (en) * | 2020-08-31 | 2020-12-25 | 中铁第四勘察设计院集团有限公司 | Fabricated foundation pit steel supporting structure and construction method thereof |
| CN216551972U (en) * | 2021-11-22 | 2022-05-17 | 中国十九冶集团有限公司 | Easy folding steel shotcrete of adjustable axial force |
| CN115163077A (en) * | 2022-08-26 | 2022-10-11 | 贵州省交通规划勘察设计研究院股份有限公司 | Adjustable profile steel supporting structure for shaft supporting and suspension assembly method |
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