CN115627767A - Recyclable foundation pit inclined supporting structure and construction method - Google Patents
Recyclable foundation pit inclined supporting structure and construction method Download PDFInfo
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- CN115627767A CN115627767A CN202211151026.7A CN202211151026A CN115627767A CN 115627767 A CN115627767 A CN 115627767A CN 202211151026 A CN202211151026 A CN 202211151026A CN 115627767 A CN115627767 A CN 115627767A
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 91
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 83
- 239000010959 steel Substances 0.000 claims abstract description 83
- 238000009412 basement excavation Methods 0.000 claims description 30
- 238000004064 recycling Methods 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/14—Sealing joints between adjacent sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a recyclable foundation pit inclined supporting structure and a construction method, wherein the recyclable foundation pit inclined supporting structure comprises an outer-layer supporting pile and a plurality of steel sheet piles positioned on the inner side of the outer-layer supporting pile, the plurality of steel sheet piles are detachably fixed on a transverse supporting piece, the transverse supporting piece is detachably connected with one end of a plurality of connecting pieces, the other end of each connecting piece is detachably and fixedly connected with a pile sheet pile, each connecting piece comprises a plurality of connecting sections which are sequentially connected, and adjacent connecting sections are detachably and fixedly connected.
Description
Technical Field
The invention relates to the technical field of foundation pit excavation supporting, in particular to a recyclable foundation pit inclined supporting structure and a construction method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Adopt the form of stull in traditional excavation supporting construction more, set up the horizontal brace between two relative pot walls in foundation ditch promptly, the construction and the earthwork excavation of stull go on simultaneously, along with digging along with propping at the excavation in-process, prop up the supporting construction of both sides, can guarantee that the foundation ditch is stable, obtain wide application in excavation supporting, however the stull has occupied foundation ditch inner space, the removal of excavation equipment has been restricted, the slow cycle of stull construction speed is long simultaneously, influence the inside construction progress of foundation ditch.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a recyclable foundation pit inclined supporting structure, a cross brace is not required to be arranged, the work of excavation equipment is facilitated, and the construction period is shortened.
In order to achieve the purpose, the invention adopts the following technical scheme
In a first aspect, an embodiment of the invention provides a recoverable foundation pit inclined support structure, which comprises an outer-layer support pile and a plurality of steel sheet piles located inside the outer-layer support pile, wherein the plurality of steel sheet piles are detachably fixed on a transverse support member, the transverse support member is detachably connected with one ends of a plurality of connecting pieces, the other ends of the connecting pieces are detachably and fixedly connected with the outer-layer support pile, each connecting piece is formed by sequentially connecting a plurality of connecting sections, and adjacent connecting sections are detachably and fixedly connected.
Optionally, outer fender pile adopts the sheet pile, the sheet pile includes a plurality of parallel arrangement's fender pile, is provided with board between the stake between the adjacent fender pile, and fixed connection can be dismantled with the sheet pile through the pre-buried mounting of sheet pile to the one end of connecting piece.
Optionally, the first fixing part comprises a first fixing plate and a second fixing plate which are arranged in parallel, one end of the first fixing plate and one end of the second fixing plate are fixed inside the supporting pile in a pre-buried mode, a locking bolt penetrates through one end of the connecting piece, the locking bolt sequentially penetrates through the first fixing plate, the connecting piece and the second fixing tube plate and then screws the fixing nut, and the fixing nut is pressed on the second fixing plate.
Optionally, the transverse supporting member is provided with a second fixing member, and the transverse supporting member is detachably and fixedly connected with the end portion of the connecting member through the second fixing member.
Optionally, the second fixing part comprises a third fixing plate and a fourth fixing plate which are arranged in parallel, the third fixing plate and the fourth fixing plate are fixed to the transverse supporting piece, the end part of the connecting piece penetrates through the locking bolt, the locking bolt penetrates through the third fixing plate, the connecting piece and the fourth fixing plate in sequence and then screws the fixing nut, and the fixing nut is pressed on the fourth fixing plate.
Optionally, flanges are arranged at two ends of each connecting section, and adjacent connecting sections are detachably and fixedly connected through the flanges.
Optionally, the steel sheet pile passes through the transverse support member through an opening formed in the transverse support member, and is detachably and fixedly connected with the transverse support member through a locking bolt.
Optionally, the bottom end of the steel sheet pile is provided with a pointed structure.
Optionally, the transverse supporting member includes a plurality of supporting portions, and adjacent supporting portions are detachably and fixedly connected.
In a second aspect, an embodiment of the present invention provides a construction method for a recoverable foundation pit inclined support structure, including the following steps:
step 1: constructing an outer support pile;
and 2, step: sequentially constructing a plurality of steel sheet piles according to a predetermined single excavation position of the foundation pit;
and step 3: placing a transverse supporting piece, fixedly connecting a plurality of steel sheet piles with the transverse supporting piece, and then sequentially connecting one ends of a plurality of connecting pieces with the transverse supporting piece and connecting the other ends of the connecting pieces with the outer-layer support piles;
and 4, step 4: excavating the foundation pit until the foundation pit is excavated to a set depth;
and 5: after the foundation pit is excavated to a set depth, the transverse supporting piece and the steel sheet pile are disassembled, and the steel sheet pile is pulled out;
step 6: and (5) repeating the steps 2-5 until the foundation pit is excavated to the excavation depth set by the target.
The invention has the beneficial effects that:
1. according to the foundation pit supporting structure, the steel sheet pile, the transverse supporting piece and the connecting piece are used for supporting the outer supporting pile, the arrangement of the transverse support is omitted, the internal space of a foundation pit cannot be occupied, the available space in the foundation pit is enlarged, the movement of excavation equipment is facilitated, the connecting piece and the transverse supporting piece are detachably connected through the steel sheet pile, the connecting piece and the transverse supporting piece, the steel sheet pile is economical and applicable, high in flexibility, easy to construct, good in durability and high in secondary utilization rate, construction is convenient, the construction period is shortened, the steel sheet pile, the transverse supporting piece, the connecting piece and the outer supporting pile are detachably connected, the whole structure is in an assembly type, the steel sheet pile, the transverse supporting piece and the connecting piece can be recycled, materials are saved, and the construction cost is reduced.
2. According to the foundation pit supporting structure, the connecting piece, the outer-layer supporting pile and the transverse supporting piece are detachably connected, the connecting piece is formed by a plurality of connecting sections in a detachable mode, the length of the connecting piece can be adjusted, the angle between the connecting piece and the outer-layer supporting pile and the angle between the connecting piece and the transverse supporting piece can be adjusted flexibly, the position of the steel sheet pile can be adjusted flexibly according to the excavation range and depth of a foundation pit, the steel sheet pile and the traditional outer-layer supporting structure are connected into a whole, supporting is provided for the foundation pit, and the supporting effect is good.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic view of a connecting member according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the assembly of the connecting member and the first fixing member according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the structure of a lateral support member according to embodiment 1 of the present invention;
FIG. 5 is a schematic view of the assembly of a steel sheet pile and a transverse support member according to embodiment 1 of the present invention;
the pile comprises a supporting pile body 1, a pile inter-plate body 2, a steel plate pile body 3, a transverse supporting piece 4, a transverse supporting portion 4-1, a fixing bolt 4-2, a fixing nut 4-3, a connecting piece 5, a connecting section 5-1, a flange plate 5-2, a first connecting head 5-3, a second connecting head 5-4, a second fixing piece 6, a first fixing piece 7, a locking bolt 8 and a locking nut 9.
Detailed Description
For convenience of description, the words "up" and "down" in the present application, if any, are used merely to indicate correspondence with the directions of the upper and lower portions of the drawings, and are not intended to limit the structure, but merely to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or components so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
In this embodiment, the side of the pile-sheet pile close to the foundation pit is defined as the inner side of the pile-sheet pile.
Example 1
The embodiment provides a recoverable foundation pit inclined supporting structure, which comprises an outer supporting pile and a plurality of steel sheet piles positioned on the inner side of a pile sheet pile, as shown in figures 1-5.
The outer fender pile adopts sheet pile or drilling bored concrete pile etc. and in this embodiment, outer fender pile adopts sheet pile, and economic environmental protection, energy consumption are lower, stable in structure, and the stagnant water is effectual, and the prevention of seepage can the reinforce, and construction speed is fast, and comprehensive benefit is showing, especially can be applied to the excavation of weak water-bearing stratum foundation ditch and strut.
Specifically, the sheet pile adopts current sheet pile structure can, including a plurality of fender piles 1, the axis parallel arrangement of a plurality of fender piles 1 is provided with board 2 between the stake between adjacent fender pile 1. The supporting piles 1 and the inter-pile plates 2 form the pile-plate piles together.
The steel sheet pile 3 is made of I-shaped steel, and the bottom end of the steel sheet pile 3 is of a pointed structure in order to conveniently drive the steel sheet pile 3 into a soil layer.
The foundation pit supporting structure further comprises a transverse support member 4 and a plurality of connecting members 5.
The transverse support 4 is perpendicular to the steel sheet piles 3, and the steel sheet piles 3 penetrate through the transverse support 4 and are detachably and fixedly connected with the transverse support 4.
The transverse support 4 has a plurality of transverse support portions 4-1, with adjacent transverse support portions 4-1 being detachably connected along the length of the transverse support 4.
The transverse supporting part 4-1 is of a cuboid structure with an open top and comprises a bottom plate, the bottom plate is a rectangular steel plate, side plates are arranged at four edges of the top surface of the bottom plate and made of steel plates and are welded and fixed with the bottom plate.
In the adjacent transverse supporting parts, a plurality of connecting holes are formed in the side plates close to each other, in the embodiment, two connecting holes are formed, fixing bolts 4-2 penetrate through the connecting holes, the fixing bolts are used for screwing fixing nuts 4-3, and the two adjacent transverse supporting parts are locked and fixed through the fixing bolts 4-2 and the fixing nuts 4-3.
One end of the connecting piece 5 is detachably and fixedly connected with the pile sheet pile, and the other end of the connecting piece is detachably and fixedly connected with the transverse supporting piece 4. By means of the connecting pieces, an inclined support between the steel sheet pile and the sheet pile 3 is formed.
In this embodiment, the quantity and the setting position of connecting piece 5 and the quantity and the setting position phase-match of steel sheet pile, 5 one ends of connecting piece and the fender pile 1 of sheet pile can dismantle fixed connection, and in the sheet pile, 1 interval settings of the stake pile of connecting piece 5.
It is understood that the position and the number of the connecting pieces can be set by those skilled in the art according to actual needs.
One end of the connecting piece 5 is detachably and fixedly connected with the support pile 1 of the sheet pile through a first fixing piece 7.
The first fixing piece 7 is arranged at a position which is 30cm-80cm away from the pile top of the support pile.
The locking bolt 8 penetrates through the threads in the first fixing plate, the end part of the connecting piece and the second fixing plate, the locking bolt 8 sequentially penetrates through the first fixing plate, the locking nut 9 is screwed through the threads behind the end part of the connecting piece and the second fixing plate, the locking nut 9 is tightly pressed on the outer side surface of the second fixing plate, meanwhile, the head of the locking bolt 8 is tightly pressed on the outer side surface of the first fixing plate, and the detachable fixed connection of the connecting piece and the support pile is achieved.
Meanwhile, the locking bolt 8 is in threaded connection with the end part of the connecting piece 5, so that the angle between the connecting piece 5 and the pile sheet pile can be adjusted.
The inner side surface of the lateral plate of the transverse supporting member 4 close to the sheet pile is provided with a second fixing member 6, and the second fixing member 6 is detachably and fixedly connected with the other end of the connecting member 5.
Specifically, second mounting 6 includes parallel arrangement's third fixed plate and fourth fixed plate, third fixed plate and fourth fixed plate all adopt the steel sheet, the one end of third fixed plate and fourth fixed plate and horizontal support piece 4 are close to the curb plate medial surface welded fastening of sheet pile, third fixed plate and fourth fixed plate all are provided with corresponding screw hole, it is corresponding, the tip of connecting piece also is provided with the screw hole, the third fixed plate, connecting piece tip and fourth fixed plate have passed locking bolt 8 through the screw hole screw thread, locking bolt 8 passes the third fixed plate in proper order, locking nut 9 screws behind connecting piece tip and the fourth fixed plate, locking nut 9 presses the lateral surface at the fourth fixed plate, locking bolt 8's head compresses tightly the lateral surface at the third fixed plate simultaneously, and then realized connecting piece 5 and horizontal support piece 4's dismantled fixed connection. Since the connection member 5 is screw-coupled with the locking bolt 8 between the third and fourth fixing plates, the angle between the connection member 5 and the lateral support member 4 can be adjusted.
The connecting piece 5 adopts a structure with adjustable length, and in the embodiment, the connecting piece is formed by detachably connecting a plurality of connecting sections 5-1.
Specifically, two end parts of the connecting section 5-1 are respectively provided with a flange 5-2, adjacent connecting sections are detachably and fixedly connected through the flange 5-2, a fixing bolt and a fixing nut, the outer end part of the connecting section 5-1 at one end is connected with a first connecting head 5-3 matched with a first fixing part through the flange 5-2, a threaded hole for a locking bolt to penetrate through is formed in the first connecting head 5-3, the outer end part of the connecting section 5-1 at the other end is connected with a second connecting head 5-4 matched with a second fixing part 10 through the flange 5-2, and a threaded hole for a locking bolt 8 to penetrate through is formed in the second connecting head 5-4.
In this embodiment, the adjacent flanges 5-2 are fixed by four locking bolts.
Because the quantity of the linkage segment of connecting piece 5 is adjustable, consequently the length of connecting piece 5 is adjustable, combines the angularly adjustable of connecting piece 5 and sheet pile and horizontal support piece 4, consequently can be under the fixed condition in sheet pile position, the position of adjusting steel sheet pile to satisfy the demand of different foundation ditch excavation scopes. Therefore, the supporting structure of the embodiment can flexibly adjust the position of the steel sheet pile according to the excavation range and the depth of the foundation pit, the steel sheet pile and the traditional outer layer supporting structure are connected into a whole, supporting is provided for the foundation pit, and the supporting effect is good.
In this embodiment the angle between the connector 5 and the sheet pile is 0-70 deg.. And determining according to the excavation range of the foundation pit.
The concrete mode of the detachable fixed connection of the transverse support 4 and the steel sheet pile 3 is as follows:
the bottom plate of the transverse support member 4 is provided with an opening through which a steel sheet pile penetrates, the steel sheet pile is made of I-shaped steel, so that the opening in the embodiment is provided with an I-shaped hole, the steel sheet pile 3 is provided with two flange plates and a web plate located between the two flange plates, the web plate is provided with two first fixing holes, a second fixing hole matched with the first fixing hole is formed in the side plate of the transverse support member far away from the pile plate pile, the first fixing hole and the second fixing hole are threaded holes, the first fixing hole and the second fixing hole penetrate through a locking bolt 8, the head of the locking bolt 8 is tightly pressed with the outer side face of the side plate, the locking bolt penetrates through the end portion of the web plate and is screwed with a locking nut 9, the locking nut 9 is tightly pressed on the web plate, and detachable fixed connection of the steel sheet pile and the transverse support member 4 is achieved.
The bearing structure of this embodiment, utilize the steel sheet pile, horizontal support piece and connecting piece support outer fender pile, the setting of stull has been saved, can not occupy the foundation ditch inner space, the usable space in foundation ditch inside has been enlarged, the removal of excavation equipment has been made things convenient for, and through the steel sheet pile, the connecting piece, the connection setting dismantled between the horizontal support piece, because the steel sheet pile economy is suitable for, the flexibility is strong, easily construction, the durability is good, the reutilization rate is high, therefore construction convenience, construction period is shortened, moreover, the steel sheet pile, horizontal support piece, be the connection dismantled between connecting piece and the outer fender pile, wholly be the assembled, the steel sheet pile, horizontal support piece and connecting piece can recycle, the material is saved, construction cost is reduced.
All connecting pieces 5, transverse supporting pieces 4 and steel sheet piles can be detachably connected, so that the connecting pieces, the transverse supporting pieces and the steel sheet piles can be recycled, the economic efficiency and the environmental protection are realized, the construction cost is saved, the stability of the whole supporting structure can be improved, the structure is stable, and the comprehensive benefit is remarkable.
Example 2
The embodiment provides a construction method of the recoverable foundation pit inclined support structure in embodiment 1, including the following steps:
the method comprises the steps of calculating the position and the size of a pile-plate pile structure in advance according to site conditions, a foundation pit excavation range and excavation depth, determining the distance between pre-buried first fixing pieces, and determining excavation steps and the excavation depth of each step.
Connecting pieces with different lengths are prefabricated, a first connecting head 5-3 and a second connecting head 5-4 are prefabricated according to the sizes of the connecting pieces, a welding flange 5-2, a prefabricated steel sheet pile 3 and a transverse supporting piece 4 are prefabricated.
Calculating and analyzing the sizes and the hole opening positions of all the threaded holes, drilling the threaded holes in the preset positions of the corresponding parts by adopting a hole opening machine, and prefabricating locking bolts and locking nuts, fixing bolts and fixing nuts with different sizes.
The specific construction method comprises the following steps:
step 1: and (5) constructing the pile sheet pile.
The construction method adopts the existing pile-plate pile construction method, and comprises the following specific steps:
step 1.1: construction preparation, site leveling, measurement and lofting, determination of pile positions of all supporting piles, and entering of equipment for assembly and debugging.
Step 1.2: preparing slurry according to the site strength requirement, mechanically positioning, drilling and spraying, forming holes, forming piles and plates, and embedding a first fixing piece to an appointed position in the casting process of the support pile.
Step 1.3: and (5) constructing the pile-plate piles in a crossed manner until a continuous pile-plate pile supporting structure is formed.
The construction method may be any conventional method, and the details of the method are not described in detail herein.
Step 2: and determining the position of single excavation of the foundation pit, and sequentially driving a plurality of steel sheet piles 3 according to the set position.
The method specifically comprises the following steps:
step 2.1: and (4) checking the quality and size of the steel sheet pile 3, correcting the fore shaft deformation and the pile body bending deformation, removing the surface corrosion, and ensuring the normal use of the steel sheet pile.
Step 2.2: before driving, grease or other lubricants are smeared at the pile end of the steel sheet pile 3, so that the steel sheet pile 3 can be driven conveniently.
Step 2.3: and measuring and positioning, paying off according to the position of the foundation pit, determining the pile position of each steel sheet pile, hoisting the steel sheet pile by using machinery, manually righting in place, monitoring the position of the steel sheet pile by using a theodolite, and measuring in real time in the pile placing process to ensure that the steel sheet pile vertically drills in.
Step 2.4: and after rechecking is correct, pile placing is carried out in a mechanical driving mode, theodolite data are read in real time, pile placing is continued until the preset position after confirming that the pile is correct, and temporary fixing is carried out.
Step 2.5: and (3) driving the steel sheet piles 3 by adopting a single-pile one-by-one driving method, manually positioning the second steel sheet pile 3 after the first steel sheet pile 3 is driven, and repeating the steps until all the steel sheet piles are driven to the preset position.
And 3, step 3: placing a transverse support 4, fixedly connecting a plurality of steel sheet piles 3 with the transverse support 4, and then sequentially connecting one ends of a plurality of connecting pieces 5 with the transverse support 4 and connecting the other ends with pile sheet piles;
the method comprises the following specific steps:
step 3.1: the transverse support 4 is placed at a set position, the part of the top of the steel sheet pile, which is exposed out of the soil body, penetrates through the bottom plate of the transverse support 4 through the hole, the plurality of transverse support parts 4-1 are fixed through the fixing bolts 5 and the fixing nuts 6, and the steel sheet pile and the transverse support 4 are fixed through the locking bolts 8 and the locking nuts 9.
Step 3.2: and calculating the length and the connection angle of the connection piece required by analysis, and determining the length and the number of the connection sections.
Step 3.3: the connecting section 5-1 is fixed through a flange 5-2, and the two ends are respectively fixed with a first connector 5-3 and a second connector 5-4 through the flange 5-2.
Step 3.4: the first connector 5-3 is fixed with the first fixing part 7 through the locking bolt 8 and the locking nut 9, the second connector 5-4 is fixed with the second fixing part 10 through the locking bolt 8 and the locking nut 9, so that the pile sheet pile and the steel sheet pile 3 form an integral structure, the bolt connection effect is checked, normal use is guaranteed, and the connecting parts 5 are sequentially connected by adopting the same steps.
In this embodiment, if necessary, a part of soil between the sheet pile and the steel sheet pile may be excavated to facilitate installation of the connecting member and the lateral support member.
And 4, step 4: and (5) excavating the foundation pit in the step, and leveling and cleaning the excavation surface of the foundation pit after construction is finished so as to facilitate next construction. Among the foundation ditch excavation process, through setting up connecting piece 5 and transverse support piece 4, be connected steel sheet pile and 3 stake sheet piles and become a whole, avoided steel sheet pile 3 whole when the excavation to topple, need not the more steel sheet pile of use and link together, reduced steel sheet pile's use quantity, reduced construction cost.
And 5: after the foundation pit is excavated to a set depth, the connecting pieces 5 and the transverse supporting pieces 4 are removed, the steel sheet piles 3 are mechanically pulled out, and the steel sheet piles 3 are pulled out by the existing construction method, which is not described in detail herein. The steel sheet piles, the connecting pieces and the transverse supporting pieces can be repeatedly used in the excavation process.
And 6: and (5) repeating the steps (2) to (5) until the whole foundation pit is excavated to the excavation depth set by the target.
When the excavation range of the foundation pit changes, the length and the angle of the connecting piece 5 only need to be adjusted, so that the construction position of the steel sheet pile 3 meets the requirement of the excavation range of the foundation pit.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. The utility model provides a but recovery type foundation ditch slope bearing structure which characterized in that, includes outer fender pile and a plurality of steel sheet pile that are located outer fender pile inboard, and a plurality of steel sheet pile detachable fix on horizontal support piece, horizontal support piece can be dismantled with the one end of a plurality of connecting pieces and be connected, and fixed connection can be dismantled with outer fender pile to the other end of connecting piece, and the connecting piece includes to be connected gradually by a plurality of linkage segments and constitutes, and fixed connection can be dismantled to adjacent linkage segment.
2. The foundation pit inclined supporting structure capable of recycling as claimed in claim 1, wherein the outer supporting piles are pile sheet piles, the pile sheet piles comprise a plurality of supporting piles arranged in parallel, an inter-pile plate is arranged between adjacent supporting piles, and one end of the connecting member is detachably and fixedly connected with the pile sheet piles through fixing members pre-embedded in the supporting piles.
3. The foundation pit inclined supporting structure capable of being recovered as claimed in claim 2, wherein the first fixing member comprises a first fixing plate and a second fixing plate which are arranged in parallel, one end of the first fixing plate and one end of the second fixing plate are fixed in the supporting pile in a pre-embedded mode, one end of the connecting member is threaded through a locking bolt, the locking bolt sequentially penetrates through the first fixing plate, the connecting member and the second fixing tube plate and then screws the fixing nut, and the fixing nut is tightly pressed on the second fixing plate.
4. The foundation pit inclined supporting structure capable of being recovered as claimed in claim 1, wherein the transverse supporting member is provided with a second fixing member, and the transverse supporting member is detachably and fixedly connected with the end of the connecting member through the second fixing member.
5. The foundation pit inclined supporting structure capable of being recycled as claimed in claim 4, wherein the second fixing member comprises a third fixing plate and a fourth fixing plate which are arranged in parallel, the third fixing plate and the fourth fixing plate are fixed with the transverse supporting member, a locking bolt is threaded through the end of the connecting member, the locking bolt sequentially penetrates through the third fixing plate, the connecting member and the fourth fixing plate, then a fixing nut is screwed, and the fixing nut is tightly pressed on the fourth fixing plate.
6. The foundation pit inclined supporting structure capable of recycling as claimed in claim 1, wherein flanges are provided at both ends of the connecting sections, and adjacent connecting sections are detachably and fixedly connected through the flanges.
7. The foundation pit inclined supporting structure capable of being recovered as claimed in claim 1, wherein the steel sheet piles pass through the transverse supporting members through the openings formed in the transverse supporting members and are detachably and fixedly connected with the transverse supporting members through locking bolts.
8. The reclaimable foundation pit inclined support structure of claim 1, wherein the bottom end of the steel sheet pile has a pointed structure.
9. The recoverable inclined supporting structure for the foundation pit as claimed in claim 1, wherein the transverse supporting member comprises a plurality of supporting parts, and adjacent supporting parts are detachably and fixedly connected.
10. A construction method of the reclaimable foundation pit inclined support structure of any one of claims 1 to 9, comprising the steps of:
step 1: constructing an outer support pile;
step 2: sequentially constructing a plurality of steel sheet piles according to a predetermined single excavation position of the foundation pit;
and step 3: placing a transverse supporting piece, fixedly connecting a plurality of steel sheet piles with the transverse supporting piece, and then sequentially connecting one ends of a plurality of connecting pieces with the transverse supporting piece and connecting the other ends of the connecting pieces with the outer-layer support piles;
and 4, step 4: excavating the foundation pit until the foundation pit is excavated to a set depth;
and 5: after the foundation pit is excavated to a set depth, the transverse supporting piece and the steel sheet pile are disassembled, and the steel sheet pile is pulled out;
step 6: and (5) repeating the steps 2-5 until the foundation pit is excavated to the excavation depth set by the target.
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| CN202211151026.7A CN115627767A (en) | 2022-09-21 | 2022-09-21 | Recyclable foundation pit inclined supporting structure and construction method |
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| CN202211151026.7A CN115627767A (en) | 2022-09-21 | 2022-09-21 | Recyclable foundation pit inclined supporting structure and construction method |
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