CN211523223U - Rectangular shape foundation ditch supporting device of assembled - Google Patents
Rectangular shape foundation ditch supporting device of assembled Download PDFInfo
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- CN211523223U CN211523223U CN201921869682.4U CN201921869682U CN211523223U CN 211523223 U CN211523223 U CN 211523223U CN 201921869682 U CN201921869682 U CN 201921869682U CN 211523223 U CN211523223 U CN 211523223U
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Abstract
The utility model discloses an assembled rectangular shape excavation supporting device, include: the assembled steel pipe main support structure comprises a first assembled side wall soil retaining flat plate, a second assembled side wall soil retaining flat plate, four groups of vertical rib assemblies, an assembled steel pipe main support structure and a steel pipe bottom support assembly; the first assembled side wall retaining slab and the second assembled side wall retaining slab are parallel; each group of vertical rib components has the same structure and is respectively connected with the two side edges of the first assembled side wall retaining plate and the second assembled side wall retaining plate; the assembled steel pipe main support structure is supported and arranged at the middle and upper parts between the first and second assembled side wall soil retaining flat plates; the steel pipe bottom support component supports and is arranged at the lower part between the first assembled side wall retaining slab and the second assembled side wall retaining slab. The utility model discloses a recoverable assembled steel construction carries out the construction of strutting of rectangular shape foundation ditch, can realize the requirement of the quick construction of green, shortens the occupation of land time, has eliminated the pollution of concrete to the environment, has reduced construction cost.
Description
Technical Field
The utility model relates to an underground works field of strutting especially relates to an assembled rectangular shape excavation supporting device.
Background
The open excavation foundation pit is one of common support forms in the construction process of the existing underground engineering structure, the construction method is mature in technology, stable and safe in structure and high in construction efficiency, and is a necessary means for construction of shallow buried line type structures. The traditional construction process of the reinforced concrete support foundation pit comprises the steps of driving a cast-in-place pile into the side line of the foundation pit, lowering a reinforcing mesh and pouring concrete, excavating a central soil body after the strength of the concrete meets the requirement, and adding a support. However, with the acceleration of the urbanization process, the disadvantages of the traditional reinforced concrete foundation pit supporting structure in the aspect of materials are gradually shown, and the problems that the concrete environment is polluted, the construction progress is influenced by the concrete strength exertion time, and the concrete cannot be recycled and reused mainly exist.
At present, a large amount of research work is carried out by domestic related scientific research institutions around assembled foundation pit supporting structures and technologies, and various assembled foundation pit supporting structures and technologies are provided. The Chinese patent with application number 201610657079.4 discloses a construction method of a frame reverse-working superposed assembly type foundation pit structure, which comprises the steps of designing foundation pit piling points, driving rock-socketed piles, arranging enclosures among the pile points, and reversely excavating downwards from the ground surface after bottom grouting. The method has the defects of limited applicable stratum conditions, inapplicability to deep and soft clay stratum, poor connection of the containment plate and the pile and possibility of water permeation. The application number 201611200005.4 discloses an assembled compensating beam foundation ditch braced system, including box enclosing purlin roof beam, saw-shaped connecting piece, rectangle connecting piece, bracing angle brace connecting piece. The assembly of the supporting structure is achieved by connecting the various components in sequence. But it has the shortcoming that too much subassemblies are unfavorable for moment transmission among the supporting construction, appear the phenomenon that the component destroyed easily, and the field installation is loaded down with trivial details, is unfavorable for quick construction. Chinese patent application No. 201910514053.8 discloses a recoverable assembled excavation supporting construction, including rectangle prefabricated component, cross support, recoverable stock. And the foundation pit is supported by combining the prefabricated parts and various parts. But has the disadvantages that the foundation pit lacks an inner support structure and the side wall is easy to be unstable. The small-sized objects such as rubber water stop bars exist, and the assembling process is complex.
Therefore, how to provide a supporting construction that can realize that the assembly is quick, stable in structure and can demolish fast and conveniently retrieve and recycle the supporting construction to rectangular shape foundation ditch after the structure construction finishes is the problem that needs to be solved.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing a rectangular shape underground structure supporting device of assembled can solve current assembled underground structure and have the assembling process complicated, uses inconvenient and the poor scheduling problem of structural stability.
The utility model aims at realizing through the following technical scheme:
the utility model discloses embodiment provides an assembled rectangular shape excavation supporting device, include:
the assembled steel pipe main support structure comprises a first assembled side wall soil retaining flat plate, a second assembled side wall soil retaining flat plate, four groups of vertical rib assemblies, an assembled steel pipe main support structure and a steel pipe bottom support assembly; wherein the content of the first and second substances,
the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate have the same structure and are arranged in parallel;
each group of vertical rib components has the same structure;
two side edges of the first assembled side wall soil retaining flat plate are respectively provided with a group of vertical rib components through bolt connection;
two sides of the second assembled side wall soil retaining plate are respectively provided with a group of vertical rib components through bolt connection;
the assembled steel pipe main support structure is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, and two ends of the assembled steel pipe main support structure are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate and supported between the middle upper parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate;
the steel pipe bottom support component is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, two ends of the steel pipe bottom support component are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate, and the steel pipe bottom support component is supported between the lower parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a rectangular shape excavation supporting device of assembled, its beneficial effect is:
(1) the prefabricated components are adopted for assembly, so that the strength exertion time of concrete is eliminated, and the quick support and the quick assembly along with the soil body excavation are realized;
(2) the three-dimensional inner support structure is suitable for the subsection construction of the strip foundation pit and the construction of a structural object.
(3) The supporting form of grading and segmenting is adopted, and the method can be suitable for supporting engineering of foundation pits with different depths and different lengths.
(4) All the components can be recycled, and the pollution of concrete to the environment is completely eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an overall schematic view of an assembled type elongated foundation pit supporting device provided in an embodiment of the present invention;
FIG. 2 is a schematic three-dimensional structure of the connection between the primary and secondary steel webs of FIG. 1;
FIG. 3 is a schematic representation of the relative positions of the primary steel web wall, the primary vertical ribs and the top connectors of FIG. 1;
FIG. 4 is a schematic view of the assembly of the primary and secondary vertical ribs of FIG. 1;
FIG. 5 is an assembled sectional view of the main steel pipe brace, the auxiliary steel pipe brace, the inclined steel pipe brace, the primary vertical rib and the transverse channel steel brace in FIG. 1;
the corresponding parts of each mark in the figure are: 1-a first assembled sidewall retaining slab; 2-a second assembled sidewall retaining slab; 3-assembling type steel pipe main support structure; 4-a steel pipe bottom support component; 5-first-stage vertical ribs; 51-vertical rib bolt holes; 6-second grade steel abdominal wall; 7-steel pipe diagonal bracing; 8-steel pipe auxiliary support; 9-channel steel cross bracing; 10-first-grade steel abdominal wall; 11-secondary vertical ribs; 12-a top connector; 13-steel pipe main support; 14-steel pipe bottom bracing; 121-head cover bolt holes; 101-top guide groove; 102-corrugated plate webs; 103-reinforcing cross ribs; 104-a slot; 105-guide slot bolt holes; 111-top bracing target site plate; 112-bolt holes; 31-a diagonal bracing positioning module; 32-main diagonal bracing tube; 33-a fastening ring; 34-rotating the ball axle.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1, the embodiment of the utility model provides an assembled rectangular shape excavation supporting device, include:
the assembled steel pipe main support structure comprises a first assembled side wall soil retaining flat plate, a second assembled side wall soil retaining flat plate, four groups of vertical rib assemblies, an assembled steel pipe main support structure and a steel pipe bottom support assembly; wherein the content of the first and second substances,
the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate have the same structure and are arranged in parallel;
each group of vertical rib components has the same structure;
two side edges of the first assembled side wall soil retaining flat plate are respectively provided with a group of vertical rib components through bolt connection;
two sides of the second assembled side wall soil retaining plate are respectively provided with a group of vertical rib components through bolt connection;
the assembled steel pipe main support structure is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, and two ends of the assembled steel pipe main support structure are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate and supported between the middle upper parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate;
the steel pipe bottom support component is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, two ends of the steel pipe bottom support component are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate, and the steel pipe bottom support component is supported between the lower parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate.
As shown in fig. 2, in the supporting device, the first assembled sidewall retaining plate includes:
the steel web comprises a first-stage steel web wall, a second-stage steel web wall, reinforcing transverse ribs and top guide grooves; wherein the content of the first and second substances,
the secondary steel abdominal wall is attached to the bottom of the primary steel abdominal wall to form an integral flat plate structure;
two side edges of the first-stage steel web wall and the second-stage steel web wall are respectively arranged in a plurality of vertical rib bolt holes for connecting vertical rib components;
the reinforcing transverse ribs are fixedly attached to the inner wall of the top edge of the secondary steel abdominal wall and are positioned between the two side edges of the secondary steel abdominal wall;
the top of one-level steel stomach wall is fixed to be set up the top guide way all is equipped with the guide way bolt hole on the riser of both sides of this top guide way.
In the supporting device, the first-stage steel abdominal wall adopts a corrugated steel plate; a plurality of vertical rib bolt holes arranged on two side edges of the first-stage steel web wall are all strip-shaped bolt holes;
the secondary steel abdominal wall is made of corrugated steel plates, and the top edge of the secondary steel abdominal wall is in lap joint with the bottom edge of the primary steel abdominal wall; a plurality of vertical rib bolt holes arranged on two side edges of the second-level steel web wall are all strip-shaped bolt holes.
As shown in fig. 3, the supporting device further includes: and the top connecting piece is connected with the guide groove bolt hole of the top guide groove.
As shown in fig. 4, in the above-described support device, the vertical rib assembly includes: primary vertical ribs and secondary vertical ribs; wherein the content of the first and second substances,
the first-stage vertical ribs are of I-shaped steel structures, the plate bodies of the I-shaped steel structures are provided with a plurality of strip-shaped bolt holes which can be connected with the side edges of the first-stage steel web walls, and the tops of the I-shaped steel structures are provided with bolt holes which can be connected with top guide grooves and top connecting pieces of the first-stage steel web walls;
two jacking target position plates are arranged on the first-stage vertical rib at intervals from top to bottom;
the secondary vertical ribs are of a channel steel structure, and a plate body of the channel steel structure is provided with a plurality of bolt holes which can be connected with the side edge of the secondary steel abdominal wall;
a jacking target position plate is arranged on the second-stage vertical rib;
the top of the second-level vertical rib is in lap joint with the bottom of the first-level vertical rib.
In the supporting device, each steel pipe bottom support of the steel pipe bottom support assembly supports against the lap joint of the first-level vertical rib and the second-level vertical rib, the position of each steel pipe bottom support is flush with the reinforcing transverse rib at the top of the second-level steel abdominal wall, and the steel pipe bottom supports can support against the end part of the guide groove at the top of the second-level steel abdominal wall.
As shown in fig. 5, in the supporting device, the assembled steel pipe main supporting structure includes:
the device comprises four steel pipe main supports, a steel pipe auxiliary support, eight steel pipe inclined supports, two channel steel cross supports and two inclined support positioning modules; wherein the content of the first and second substances,
the four steel pipe main supports are distributed in a square shape, and two ends of each steel pipe main support are respectively supported on the vertical rib assemblies on two sides of the first assembled side wall retaining plate and the vertical rib assemblies on two sides of the second assembled side wall retaining plate;
a channel steel cross brace is arranged between the vertical rib components at the two side edges of the first assembled side wall retaining plate and is attached to the inner wall of the first assembled side wall retaining plate;
the other channel steel cross brace is arranged between the vertical rib components at the two side edges of the second assembled side wall retaining plate and is attached to the inner wall of the second assembled side wall retaining plate;
the steel pipe auxiliary support is arranged in the middle of the four steel pipe main supports, two ends of the steel pipe auxiliary support are respectively provided with an inclined support positioning module, and the two inclined support positioning modules are respectively clamped on the channel steel cross supports on the two sides;
two ends of each steel pipe main support are respectively connected with the inclined support positioning modules at two sides through a steel pipe inclined support.
Among the above-mentioned assembled steel pipe main tributary strut structure, every steel pipe bracing is connected with every steel pipe main tributary strut and is:
one end of each steel pipe inclined strut is connected with a rotating ball shaft, the rotating ball shaft is connected with a fastening ring, and the fastening ring is fixedly sleeved at the end part of the steel pipe main strut.
Above-mentioned assembled steel pipe owner props structure still includes: the end part of each steel pipe main support is provided with one jack.
The embodiment of the utility model provides a still provide a rectangular shape foundation ditch supporting method of assembled, adopt the rectangular shape foundation ditch supporting device of assembled of multiunit foretell (refer to fig. 1 to 5), including following step:
step 1) after a stratum soil body of a target area is excavated by 30cm, pressing into first-stage steel web walls of a first assembly type side wall retaining plate and a second assembly type side wall retaining plate respectively by using machinery at two sides, stopping pressing after a top guide groove of the first-stage steel web walls contacts the soil body, and enabling the side edges of the adjacent first-stage steel web walls to be lapped and aligned to vertical rib bolt holes at the side edges;
step 2) pressing primary vertical ribs of the first and second assembled side wall retaining slabs at the lap joint to enable the edges of the primary vertical ribs to be attached to wave troughs of the primary abdominal wall, aligning bolt holes in the tops of the primary vertical ribs with slotted holes in the side edge of the primary steel abdominal wall, and connecting all aligned slotted holes and bolt holes through bolts;
step 3) installing a first layer of steel pipe main support of the assembled steel pipe main support structure, aligning to a top support target position plate on the first-level vertical rib, adding a jack at the end part to apply pretightening force, aligning a bolt hole at the top of the first-level vertical rib to a bolt hole of the guide groove, installing a top connecting piece, and penetrating the aligned bolt hole by using a bolt;
step 4), continuously excavating the soil body downwards until the last bolt hole of the first-stage vertical rib is exposed and connected completely, installing a second-layer steel pipe main support of the assembled steel pipe main support structure, and applying pre-tightening force on an end support jack;
step 5), mounting a channel steel cross brace to be attached to the inner side of the primary steel abdominal wall, and fixing the end part at the middle position of the primary vertical rib by using a bolt;
step 6), installing each steel pipe inclined strut, wherein one end of each steel pipe inclined strut is matched with an inclined strut positioning module of the channel steel transverse strut, a fastening ring at the other end of each steel pipe inclined strut is fastened on a steel pipe main strut, and a steel pipe auxiliary strut is installed, positioned at the central position of the end part of the four-direction steel pipe inclined strut and mutually meshed together;
step 7) pressing the second-level steel web walls of the first and second assembled side wall retaining plates into the soil body, wherein the pressing depth is based on that the groove hole on the side edge of the top of the second-level steel web wall is aligned with the groove hole on the side edge of the bottom of the first-level steel web wall, pressing the second-level vertical rib in the direction of the first-level vertical rib, ensuring that the second-level vertical rib is tightly attached to the corrugated grooves of the first-level steel web wall and the second-level steel web wall in the pressing process, and stopping pressing the second-level steel web wall when the bolt hole on the second-level vertical rib is aligned;
step 8), installing a steel pipe bottom support to ensure that the top support is supported on the target position plate of the second-level vertical rib and can support the end part of the reinforcing transverse rib;
and 9) grouting according to the site condition, and injecting a waterproof material into a gap between the soil body and the supporting device after the groove hole backs on the ground to complete the integral installation of the supporting device.
The utility model discloses support device's theory of operation does: the first-stage and second-stage steel web walls of the first and second assembled side wall earth retaining flat plates can effectively block the soil behind the walls to prevent the soil from collapsing, and the first-stage and second-stage vertical ribs can increase the rigidity and strength of the joints of the corrugated web walls; the steel pipe main support, the auxiliary support and the bottom support can improve the bending resistance of the corrugated abdominal wall and the vertical ribs and resist the moment generated by the deep-dug soil body; the channel steel cross brace and the steel pipe diagonal brace can achieve the protection effect of the supporting structure in the three-dimensional space, and the supporting capacity of the steel pipe brace is maximized.
The utility model discloses an assembled rectangular shape foundation ditch supporting device is assembled structure, and structural assembly and dismantlement are fast, can shorten excavation supporting's time, make construction simple process, because the stable in structure is strutted stability well and the environment withstand the dynamic height, each subassembly homoenergetic realizes retrieving and recycles, has eliminated the pollution of concrete to ecological environment completely, has reduced construction cost.
The embodiments of the present invention will be described in further detail below.
Examples
As shown in fig. 1, the present embodiment provides an assembled type elongated foundation pit supporting device, including: the assembled steel pipe main support structure comprises a first assembled side wall soil retaining flat plate, a second assembled side wall soil retaining flat plate, four groups of vertical rib assemblies, an assembled steel pipe main support structure and a steel pipe bottom support assembly;
the structure of the first assembled side wall retaining slab is the same as that of the second assembled side wall retaining slab, and the first assembled side wall retaining slab and the second assembled side wall retaining slab are arranged in parallel;
each group of vertical rib components has the same structure;
two side edges of the first assembled side wall soil retaining flat plate are respectively provided with a group of vertical rib components through bolt connection;
two sides of the second assembled side wall soil retaining plate are respectively provided with a group of vertical rib components through bolt connection;
the assembled steel pipe main support structure is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, and two ends of the assembled steel pipe main support structure are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate and supported between the middle upper parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate;
the steel pipe bottom support component is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, two ends of the steel pipe bottom support component are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate, and the steel pipe bottom support component is supported between the lower parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate.
It will be appreciated that the above-described retaining devices are in the form of a set, and that a plurality of such retaining devices may be used to form an integral retaining structure.
Specifically, taking the assembly of two adjacent sets of supporting devices as an example, and taking the assembly and splicing of the first assembled side wall retaining flat plate structure in the supporting devices as an example, the slotted holes 104 on the side edges of the adjacent first-stage steel web walls 10 are lapped and aligned with each bolt hole 51 on the first-stage vertical rib 5, and bolts are inserted and tightly connected; the slotted hole at the bottom of the first-stage steel web wall 10 is aligned with the slotted hole at the top of the second-stage steel web wall 6, and each bolt hole of the second-stage vertical rib 11 is aligned with the slotted hole 104 at the side edge of the second-stage steel web wall 6 and is tightly connected by adopting a bolt; the second-stage vertical rib 11 is buckled at the end part of the first-stage vertical rib 5; the first layer of steel pipe main support of the assembled steel pipe main support structure is aligned with a supporting target position plate 111 on the first-level vertical rib, a jack is installed at the end part of the steel pipe main support and supports the first-level vertical rib 5, a bolt hole 51 at the top of the first-level vertical rib is aligned with a guide groove bolt hole 105 of a top guide groove, a top cover bolt hole 121 of the top connecting piece 12 is aligned with the guide groove bolt hole 105, and the steel pipe main support structure is fixed by bolts and tightly connected to enable adjacent top guide grooves to be connected into a whole; a second layer of steel pipe main support of the assembled steel pipe main support structure is arranged at the lower part of the first level of vertical rib; the channel steel cross brace 9 is attached to the first-stage steel web wall 10 and is connected to the middle position of the first-stage vertical rib 5 through a bolt; the fastening ring 33 at one end of the steel pipe inclined strut 7 is connected and fixed on the steel pipe main strut 1-2, the other end of the steel pipe inclined strut is arranged on the inclined strut positioning module 31 in the middle of the channel steel cross strut 9, and the steel pipe auxiliary strut is occluded with the end part of the steel pipe inclined strut and the inclined strut positioning module. The second-level steel abdominal wall 6 and the first-level steel abdominal wall 10 are inserted into soil in an internally-attached lap joint mode; the steel pipe bottom support 14 of the steel pipe bottom support assembly 4 is supported on the supporting target position plate 111 at the top of the second-level vertical rib 11 and can support the end part of the reinforcing transverse rib 103.
The main bodies of the first-stage steel abdominal wall 10 and the second-stage steel abdominal wall 6 are made of corrugated steel, and the wave height and the wave distance of the corrugated steel can be customized according to actual engineering requirements. The top of the first-level steel abdominal wall 10 is provided with a top guide groove, so that the bending rigidity of the plate is increased when the plate is inserted into a soil body. The joint positions of the two sides of the plate are provided with strip bolt holes (namely slotted holes, the arrangement of the strip bolt holes can avoid the phenomenon that bolts cannot penetrate due to errors caused by overlapping of plate edges), and the adjacent two plates are connected in an overlapping mode; the top of the second-level steel abdominal wall is provided with an inner fit type reinforcing transverse rib. The second-level steel abdominal wall is attached to the first-level steel abdominal wall on the side of excavating soil, and the top of the second-level steel abdominal wall is in lap joint with the tail of the first-level steel abdominal wall.
The first-stage vertical ribs 5 are made of I22I-shaped steel, and circular bolt holes are formed in the tops of the first-stage vertical ribs to realize connection with the first-stage steel abdominal wall top guide grooves and the top connecting piece. The plate body is provided with strip-shaped bolt holes, and the joint of two adjacent first-level steel abdominal walls can be stably connected through bolts.
The second grade erects the rib 11 material and is 25# channel-section steel, and the top has the bolt hole with the overlap joint of first grade erects rib afterbody on the board body, can contain the first grade and erect the rib and laminate mutually with the trough of second grade steel stomach wall, can carry out bolted connection with second grade steel stomach wall seam crossing.
The steel pipe main support 13, the steel pipe inclined support 7, the steel pipe auxiliary support 8, and the steel pipe bottom support 14 are all round steel pipes, and realize the stable internal support of the side wall structure. The steel pipe main support is supported at the middle part of the adjacent bolt hole of the first-stage vertical rib, and pretightening force can be applied by increasing the jacks.
The main body of the channel steel cross brace 9 is 25# channel steel, and the middle inclined brace positioning module 31 is made of carbon steel. The middle part of the channel steel cross brace is provided with an inclined strut positioning module which can be connected with the steel pipe inclined strut and the steel pipe auxiliary strut. The end part is fixed at the middle position of the first-level vertical rib through bolt connection.
The fastening ring 33 at the end part of the steel pipe inclined strut 7 is a split connecting piece, and can stably connect the steel pipe inclined strut and the steel pipe main strut together.
The steel pipe auxiliary support 8 is meshed with the steel channel cross support 9 and the steel pipe inclined support 7 after being supported. The steel pipe auxiliary support props up the inclined support positioning module in the middle of the channel steel cross support and is meshed with the end part of the steel pipe inclined support, and the larger the deformation of the abdominal wall is, the tighter the meshing is. The steel pipe bottom support props up the reinforcing transverse rib at the lap joint of the first-stage vertical rib and the second-stage vertical rib and is flush with the top of the second-stage steel abdominal wall, and can prop up the end position of the guide groove at the top of the second-stage steel abdominal wall.
The top connecting piece 12 is made of high-carbon steel, and can realize the connection of the top guide grooves of the adjacent first-stage steel abdominal walls.
In order to overcome the defects of the prior art, the utility model also provides a supporting method of the supporting device, which comprises the following steps:
step 1) after a stratum soil body of a target area is excavated by about 30cm, mechanically pressing a first-stage steel web wall into the side edge, stopping pressing after a top guide groove contacts the soil body, and continuously pressing the first-stage steel web wall into one side to ensure that the side edges of the adjacent first-stage steel web walls are lapped and aligned with the slotted holes of the side edges;
step 2) pressing a first-stage vertical rib at the lap joint, ensuring that the edge of the first-stage vertical rib is attached to a wave trough of the abdominal wall, aligning a bolt hole at the top of the vertical rib with a groove hole on the side edge of the first-stage steel abdominal wall, and connecting all aligned groove holes and bolt holes by bolts;
step 3), installing a first layer of steel pipe main support, aligning the first layer of steel pipe main support with a top support target position plate on the first-stage vertical rib, and additionally installing a jack at the end part to apply pre-tightening force so that a bolt hole at the top of the vertical rib is aligned with a guide groove bolt hole; mounting a top connector and passing bolts through the aligned bolt holes;
step 4), continuously excavating the soil body downwards until the last bolt hole of the first-stage vertical rib is exposed and connected completely, installing a second-layer steel pipe main support, and applying pretightening force on an end supporting jack;
step 5), mounting a channel steel cross brace to be attached to the inner side of the primary steel abdominal wall, and fixing the end part at the middle position of the primary vertical rib by using a bolt;
step 6), installing steel pipe inclined struts, wherein one ends of the steel pipe inclined struts are matched with inclined strut positioning modules of the channel steel transverse struts, fixing rings at the other ends of the steel pipe inclined struts are fastened on the steel pipe main struts, and installing steel pipe auxiliary struts 1-8 and positioning the steel pipe auxiliary struts at the central positions of the end parts of the four-direction steel pipe inclined struts to ensure that the steel pipe inclined struts are mutually meshed;
and 7) pressing the second-stage steel web wall into the soil body, wherein the pressing depth is based on that the slotted hole on the side edge of the top of the second-stage steel web wall is aligned with the slotted hole on the side edge of the bottom 1-1 of the first-stage steel web wall. Pressing the second-stage vertical ribs in the direction of the first-stage vertical ribs, ensuring that the second-stage vertical ribs are tightly attached to the corrugated grooves of the first-stage steel web wall and the second-stage steel web wall in the pressing process, and stopping pressing the second-stage steel web wall when bolt holes in the second-stage vertical ribs are aligned with second slotted holes in the second-stage steel web wall;
step 8), installing a steel pipe bottom support to ensure that the top support is supported on the target position plate of the second-level vertical rib and can support the end part of the reinforcing transverse rib;
and 9) grouting under the condition of a view field, and injecting a waterproof material into a gap between the back soil body and the supporting structure through the slotted hole to finish the integral installation of the supporting structure.
The disassembly process of the support device is as follows:
step 21) firstly, dismantling the steel pipe bottom support, backfilling to the bottom of the reinforced transverse rib of the secondary steel web wall, and sequentially pulling out the secondary vertical rib and the secondary steel web wall;
step 22), continuously backfilling soil to the bottom position of the second layer of steel pipe main support, and removing the second layer of steel pipe main support and the steel pipe inclined support fixed on the second layer of steel pipe main support;
step 23), when the earth is backfilled to the position of the channel steel cross brace, sequentially removing the steel pipe auxiliary brace, the steel pipe inclined brace and the channel steel cross brace;
and 24) continuously backfilling the soil to the bottom position of the first layer of steel pipe main support, sequentially pulling out the first-stage vertical rib and the first-stage steel web wall, and backfilling the soil to the ground to finish the dismantling work.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides an elongated foundation ditch supporting device of assembled which characterized in that includes:
the assembled steel pipe main support structure comprises a first assembled side wall soil retaining flat plate, a second assembled side wall soil retaining flat plate, four groups of vertical rib assemblies, an assembled steel pipe main support structure and a steel pipe bottom support assembly; wherein the content of the first and second substances,
the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate have the same structure and are arranged in parallel;
each group of vertical rib components has the same structure;
two side edges of the first assembled side wall soil retaining flat plate are respectively provided with a group of vertical rib components through bolt connection;
two sides of the second assembled side wall soil retaining plate are respectively provided with a group of vertical rib components through bolt connection;
the assembled steel pipe main support structure is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, and two ends of the assembled steel pipe main support structure are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate and supported between the middle upper parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate;
the steel pipe bottom support component is arranged between the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate, two ends of the steel pipe bottom support component are respectively connected with the vertical rib components on two side edges of the first assembled side wall soil retaining flat plate and the vertical rib components on two side edges of the second assembled side wall soil retaining flat plate, and the steel pipe bottom support component is supported between the lower parts of the first assembled side wall soil retaining flat plate and the second assembled side wall soil retaining flat plate.
2. An assembled elongate foundation pit supporting apparatus as claimed in claim 1 wherein said first assembled side wall retaining slab comprises:
the steel web comprises a first-stage steel web wall, a second-stage steel web wall, reinforcing transverse ribs and top guide grooves; wherein the content of the first and second substances,
the secondary steel abdominal wall is attached to the bottom of the primary steel abdominal wall to form an integral flat plate structure;
two side edges of the first-stage steel web wall and the second-stage steel web wall are respectively arranged in a plurality of vertical rib bolt holes for connecting vertical rib components;
the reinforcing transverse ribs are fixedly attached to the inner wall of the top edge of the secondary steel abdominal wall and are positioned between the two side edges of the secondary steel abdominal wall;
the top of one-level steel stomach wall is fixed to be set up the top guide way all is equipped with the guide way bolt hole on the riser of both sides of this top guide way.
3. The assembled elongated foundation pit supporting device according to claim 2, wherein the primary steel web wall is a corrugated steel plate; a plurality of vertical rib bolt holes arranged on two side edges of the first-stage steel web wall are all strip-shaped bolt holes;
the secondary steel abdominal wall is made of corrugated steel plates, and the top edge of the secondary steel abdominal wall is in lap joint with the bottom edge of the primary steel abdominal wall; a plurality of vertical rib bolt holes arranged on two side edges of the second-level steel web wall are all strip-shaped bolt holes.
4. An assembled elongate foundation pit supporting apparatus as claimed in claim 2 or claim 3, further comprising: and the top connecting piece is connected with the guide groove bolt hole of the top guide groove.
5. An elongate assembled excavation supporting apparatus as claimed in any one of claims 2 to 3, wherein the vertical rib assembly comprises: primary vertical ribs and secondary vertical ribs; wherein the content of the first and second substances,
the first-stage vertical ribs are of I-shaped steel structures, the plate bodies of the I-shaped steel structures are provided with a plurality of strip-shaped bolt holes which can be connected with the side edges of the first-stage steel web walls, and the tops of the I-shaped steel structures are provided with bolt holes which can be connected with top guide grooves and top connecting pieces of the first-stage steel web walls;
two jacking target position plates are arranged on the first-stage vertical rib at intervals from top to bottom;
the secondary vertical ribs are of a channel steel structure, and a plate body of the channel steel structure is provided with a plurality of bolt holes which can be connected with the side edge of the secondary steel abdominal wall;
a jacking target position plate is arranged on the second-stage vertical rib;
the top of the second-level vertical rib is in lap joint with the bottom of the first-level vertical rib.
6. The assembled elongated foundation pit supporting device according to claim 5, wherein each steel pipe bottom brace of the steel pipe bottom brace component is supported at the joint of the primary vertical rib and the secondary vertical rib, is flush with the reinforcing transverse rib at the top of the secondary steel web wall, and can support the end position of the reinforcing transverse rib on the secondary steel web wall.
7. The assembled elongated foundation pit supporting device according to any one of claims 1 to 3, wherein the assembled steel pipe main supporting structure comprises:
the device comprises four steel pipe main supports, a steel pipe auxiliary support, eight steel pipe inclined supports, two channel steel cross supports and two inclined support positioning modules; wherein the content of the first and second substances,
the four steel pipe main supports are distributed in a square shape, and two ends of each steel pipe main support are respectively supported on the vertical rib assemblies on two sides of the first assembled side wall retaining plate and the vertical rib assemblies on two sides of the second assembled side wall retaining plate;
a channel steel cross brace is arranged between the vertical rib components at the two side edges of the first assembled side wall retaining plate and is attached to the inner wall of the first assembled side wall retaining plate;
the other channel steel cross brace is arranged between the vertical rib components at the two side edges of the second assembled side wall retaining plate and is attached to the inner wall of the second assembled side wall retaining plate;
the steel pipe auxiliary support is arranged in the middle of the four steel pipe main supports, two ends of the steel pipe auxiliary support are respectively provided with an inclined support positioning module, and the two inclined support positioning modules are respectively clamped on the channel steel cross supports on the two sides;
two ends of each steel pipe main support are respectively connected with the inclined support positioning modules at two sides through a steel pipe inclined support.
8. The assembled elongated foundation pit supporting device according to claim 7, wherein each steel pipe diagonal brace is connected with each steel pipe main brace by:
one end of each steel pipe inclined strut is connected with a rotating ball shaft, the rotating ball shaft is connected with a fastening ring, and the fastening ring is fixedly sleeved at the end part of the steel pipe main strut.
9. The assembled elongate foundation pit supporting apparatus of claim 7, further comprising: the end part of each steel pipe main support is provided with one jack.
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| CN201921869682.4U CN211523223U (en) | 2019-11-01 | 2019-11-01 | Rectangular shape foundation ditch supporting device of assembled |
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| CN201921869682.4U CN211523223U (en) | 2019-11-01 | 2019-11-01 | Rectangular shape foundation ditch supporting device of assembled |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110670603A (en) * | 2019-11-01 | 2020-01-10 | 中国地质大学（北京） | Assembled type long strip foundation pit supporting device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670603A (en) * | 2019-11-01 | 2020-01-10 | 中国地质大学（北京） | Assembled type long strip foundation pit supporting device and method |
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