CN109680691A - The earthwork digging method of foundation pit annular brace - Google Patents
The earthwork digging method of foundation pit annular brace Download PDFInfo
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- CN109680691A CN109680691A CN201811586604.3A CN201811586604A CN109680691A CN 109680691 A CN109680691 A CN 109680691A CN 201811586604 A CN201811586604 A CN 201811586604A CN 109680691 A CN109680691 A CN 109680691A
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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
- 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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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of earthwork digging methods of foundation pit annular brace, it is related to technical field of building construction, its key points of the technical solution are that: foundation pit is successively excavated, includes base pit dewatering, the 1st layer of earth excavation of foundation pit, the 2nd layer of earth excavation of foundation pit, the 3rd layer of earth excavation of foundation pit and base plate of foundation pit earth excavation；The excavation technology is by using oblique trestle and is equipped with backfill pool slag road, cubic metre of earth vehicle when every layer of earth excavation is set can directly to go deep into the arbitrary region that digging machine excavates inside foundation pit, it reduces dregs and has bad luck number, accelerate speed of being unearthed, while having the function of improving the construction quality and construction efficiency of its earth excavation.
Description
Technical field
The present invention relates to technical field of building construction, more specifically, it relates to which a kind of earthwork of foundation pit annular brace is opened
Excavation method.
Background technique
In China's city land plan, the plot of approximating square is in the great majority, and in current east China weak soil
The supported design of going along with sb. to guard him of deep basal pit starts the internal support of foundation pit system for gradually using annular brace in the project under construction of area city, because of circle
Ring has preferable stress, and compared to traditional symmetric support, annular brace cost is lower under same support effect, because
This this kind of supporting form will certainly be more universal in downtown area.
Under annular brace system, pit earthwork must by tau-effect principle stage excavation, first support and dig afterwards, first justified
Ring supports earth excavation, excavates the earthwork in annulus after forming arch brace；It is taken in the deep basal pit of central shoring system at present
Earth excavation form is mainly include the following types: a kind of form annular lead to for trestle plate is arranged in first of annular brace of foundation pit
Road, digging machine carries out excavating and falling soil in foundation pit, and takes native platform entrucking to be unearthed by what is stretched in trestle plate；Another kind is in ring
When shape supports earth excavation, staying and set outside slight slope to foundation pit from bottom of foundation ditch, earthwork vehicle can enter dress soil inside foundation pit by slight slope,
Reduce digging machine native number.
But the force-applied condition in rear is integrally formed because that need to meet arch brace in above two method, it is necessary to support in per pass
After the support zone of slight slope covering is excavated and constructed in advance before construction, the part soil body is backfilled again, just using the slight slope
Carry out the excavation operation of this layer of earthwork；Therefore, which is only applicable to the shallower annular brace engineering of foundation depth, in base
The construction time for cheating this method in the case that depth increases, Site soil is poor increases, to influence the construction matter of earth excavation
Amount and construction efficiency.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of earth excavation of foundation pit annular brace
Method has the function of improving the construction quality and construction efficiency of its earth excavation.
To achieve the above object, the present invention provides the following technical scheme that
A kind of earthwork digging method of foundation pit annular brace, successively excavates foundation pit, includes following steps: S1, foundation pit
Precipitation: precipitation was carried out using sand tube well in 20 days before earth excavation, and well spacing is arranged less than 10m, while in building enclosure periphery
The every 20m in side beats a bite pressure reduction well；The 1st layer of earth excavation of S2, foundation pit: central shoring region, and symmetrical excavation are first excavated, then in excavation
Heart island domain, excavation construction, the earthwork are transported to base by foundation pit west side soil outlet to first segment trestle ramp simultaneously with annular brace
Hole is outer, after the completion of excavation, is supported in the circular inner support structure of the region construction current layer excavated, and in the annular
Support construction is made of multiple support units；The 2nd layer of earth excavation of S3, foundation pit: soil outlet first is set in foundation pit southern side and is backfilled
Pool slag road, then carries out second segment trestle ramp and central shoring regional earthwork in quadrangle excavates, and all cubic metres of earth of vehicles pass through the pool
Slag road enters in hole, is unearthed by digging machine entrucking, and the central island earthwork to digging is moved back at the soil outlet of southern side, is excavated and completed from the distant to the near
Afterwards, it is supported in the circular inner support structure of the region construction current layer excavated；The 3rd layer of earth excavation of S4, foundation pit:
It is used as first with second segment trestle ramp and takes native channel, and avoided level and native position of platform setting pool slag road is taken to extend to base
Quadrangle is cheated, enters the traffic route in foundation pit as earthwork vehicle, annular brace region takes native platform to excavate simultaneously with trestle level
Construction, after the completion of trestle level takes native platform, this layer of surplus earth takes native platform to enter in trestle by surrounding by level
It transports and is unearthed, after the completion of excavation, be supported in the circular inner support structure of the region construction current layer excavated；S5,
Base plate of foundation pit earth excavation: being first arranged pool slag road to foundation pit quadrangle from trestle levelling bench, allows cubic metre of earth vehicle close to digging
Machine excavates region and takes soil, then excavates to bottom plate earthwork subregion piecemeal, and to moving back digging at trestle platform, and the earthwork is most under trestle platform
After construct, entrucking digging machine is parked in level and takes native platform surrounding, and the earthwork under platform is transported to earthwork car by trestle to base
Hole is outer to be unearthed.
So set, being suitble to since arch brace system main member is all present in foundation pit quadrangle and neighboring area
Using central island-type excavation method, i.e., first progress surrounding arch brace regional earthwork excavates and after circular inner support structure of constructing,
The outer center cubic metre of earth of annulus is excavated again, it is made stablize to foundation pit the effect of support；Central shoring region keeps diagonal and excavates, to guarantee
It is unloaded in foundation pit native symmetrical, uniform；By on the outside of foundation pit soil outlet to the armored concrete stack at the oblique hole bottom of setting in the middle part of foundation pit
Bridge platform is unearthed by the direct entrucking of digging machine, is reduced so that earthwork vehicle can directly be entered by the digging machine of foundation pit inside by trestle platform
The earthwork number of turnover, to accelerate speed of being unearthed；The excavation construction technology not only solves to be faced in annular brace deep basal pit
Critical problem, while because it is independent mutually with central shoring system, load will not have an impact central shoring stress thereon, also favorably
Stablize in foundation pit, has abandoned the use of long-armed digging machine, reduced earth excavation cost；This rely on is arranged obliquely downward into foundation pit
The excavation technology of trestle form can effectively solve the problem that the central island earthwork to be unearthed slow, mechanical service efficiency is low, cost input is big etc. and ask
Topic, the excavation technology have its directiveness and operability, and based on this, the earthwork under annular brace deep basal pit may make to open
Excavation formula is more economical, safely, effectively；By using oblique trestle and it is equipped with backfill pool slag road, soil when making every layer of earth excavation
Square vehicle can directly go deep into the arbitrary region that digging machine excavates inside foundation pit, reduce dregs and have bad luck number, accelerate speed of being unearthed, together
When have the function of improve its earth excavation construction quality and construction efficiency.
Further setting: the support unit composition includes the arc panel abutted against with foundation pit inner wall, is set to arc panel
It is set on threaded rod towards the hollow piled anchor on foundation pit end face, the threaded rod that is arranged in hollow piled anchor of rotation, threads turn
The link block and one end that drive block, limit are slideably positioned on drive block are articulated with the bending bar on link block, in described
Recessing groove is offered on the circumferential side wall of empty piled anchor, the bending part of the bending bar is articulated on the cell wall of recessing groove, and initial
The other end of bending bar is mounted and sealed on recessing groove when state, and offers grouting port on the arc panel.
So set, by rotating threaded rod, being in its drive block when hollow piled anchor is plugged in the side wall of foundation pit
Hollow piled anchor inserts interior relative motion, promotes bending bar to be on recessing groove and rotates, and recessing groove is opened, and bending bar is unfolded and is plugged in
In the side wall of foundation pit；Mixed mud slurries are injected into hollow piled anchor by grouting port, fill mixed mud slurries from recessing groove
It is condensed in the side wall of foundation pit with it, has the function that for hollow piled anchor to be fixed in foundation pit, improved support unit and be fixed on base
Structural strength and stability of strutting system on hole.
Further setting: it is provided with guided way along hollow piled anchor length direction in the drive block, in the link block
On be provided with guide groove, the link block is set on guided way by guide groove oriented sliding.
So set, making its link block be in guided way by guide groove when drive block is in hollow piled anchor and moves
Upper oriented sliding improves relative stability when moving between link block and drive block, and then makes its bending bar is stable to be in
It is rotated on recessing groove, achievees the purpose that stablize construction.
Further setting: the cross section of the guided way is arranged in isosceles trapezoid shape, and the upper bottom edge of guided way and driving
Block is integrally fixedly connected, and is provided with limited block at the both ends of the guided way, and the limited block and drive block are integrally fixed
Connection.
So set, its link block is made only to generate displacement along the length direction of guided way, improves link block and be in drive block
The stability of upper movement；Limited block limitation link block is provided with using the both ends of guided way is simultaneously in slide on guided way
Range, and then preferably control rotation when rotational angle and the rotation of bending bar.
Further setting: the recessing groove arranges that described separate one end connecting with link block of bending bar is set in counterbore shape
It is set to the boss-shaped matched with recessing groove.
So set, making its bending bar improve the contact area of both in the notch for being sealed in recessing groove, while just
Stablize the effect being installed on recessing groove in bending bar.
Further setting: multiple drive blocks are provided on the threaded rod, and the drive block is respectively connected with
The bending bar.
So set, making the outer circumference surface of its hollow piled anchor, more bending bar multi-angles are plugged in the side of foundation pit after construction
In wall, improve the contact area and forced area between support unit and foundation pit, improve its circular inner support structural support in
The structural strength of stability and installation in foundation pit.
Further setting: the angle direction of the bending bar and hollow piled anchor are plugged in the direction reversed arrangement in foundation pit.
So set, in arc panel stress, power that the active force and foundation pit for being subject to its bending bar form arc panel
Reversely, it improves bending bar and acts on the adhesive force on foundation pit side-wall, and then improve the mounting structure between support unit and foundation pit
Intensity and construction stability.
Further setting: the bending bar is provided with multiple, and circumferentially shape is arranged in the drive to multiple bending bars
On the periphery of motion block.
So set, making the outer circumference surface of its hollow piled anchor, multiple bending bar multistages are plugged in the side of foundation pit after construction
In wall, improve the contact area and forced area between support unit and foundation pit, improve its circular inner support structural support in
The structural strength of stability and installation in foundation pit.
Further setting: one end that the hollow piled anchor is connected to foundation pit direction is set as pointed.
So set, being plugged in the side wall of foundation pit convenient for hollow piled anchor, achieve the purpose that convenient for operation.
Further setting: offering accommodating chamber in the end face of the arc panel towards bottom of foundation ditch, sliding in the accommodating chamber
It is dynamic to be provided with extension board, stroke groove, the stroke groove and receiving are offered on end face of the arc panel away from foundation pit side-wall
Chamber communicates arrangement, and operating block is fixedly connected on the extension board, and the operating block sliding is arranged in stroke groove and protrudes
In arrangement outside stroke groove notch.
So set, extension board is slid by driving operating block and is gone on a journey when arc panel is installed on the side wall of foundation pit
Outside journey slot, and it is plugged in the substrate of foundation pit, improves arc panel and be supported in the forced area in foundation pit, improve its circular inner support knot
Structure is supported in the stability in foundation pit and the structural strength of installation.
By using above-mentioned technical proposal, the present invention compares compared with the prior art, has the advantage that
1, by taking this kind of earth excavation technology, both solved the problems, such as that the central island earthwork took native difficulty under annular brace, together
When but also every layer of earthwork can be transported directly by earthwork vehicle, reduce the number that the digging machine earthwork is had bad luck, effectively shorten soil
Excavate the duration in side；
2, when hollow piled anchor is plugged in the side wall of foundation pit, by rotating threaded rod, so that its drive block is in hollow piled anchor and insert
Interior relative motion promotes bending bar to be on recessing groove and rotates, and recessing groove is opened, and bending bar is unfolded and is plugged in the side wall of foundation pit
It is interior；Mixed mud slurries are injected into hollow piled anchor by grouting port, fill mixed mud slurries to the side of foundation pit from recessing groove
It is condensed in wall with it, has the function that for hollow piled anchor to be fixed in foundation pit, improved support unit and be fixed on the structure on foundation pit
Intensity and stability of strutting system；
3, when arc panel is installed on the side wall of foundation pit, extension board is slid out outside stroke groove by driving operating block, and inserts
It is connected to the substrate of foundation pit, arc panel is improved and is supported in the stability of strutting system in foundation pit.
Detailed description of the invention
Fig. 1 is the earthwork structural schematic diagram of foundation pit annular brace；
Fig. 2 is the structural schematic diagram of circular inner support structure；
Fig. 3 is the schematic diagram of support unit；
Fig. 4 is the structural schematic diagram of hollow piled anchor in support unit；
Fig. 5 is the partial sectional view of hollow piled anchor in support unit；
Fig. 6 is the enlarged drawing in Fig. 5 at A.
In figure: 1, circular inner support structure；2, support unit；21, arc panel；211, grouting port；212, accommodating chamber；213,
Stroke groove；22, hollow piled anchor；221, recessing groove；23, threaded rod；24, drive block；241, guided way；25, link block；251, it leads
To slot；26, bending bar；27, limited block；28, extension board；281, operating block.
Specific embodiment
It is described further referring to earthwork digging method of the attached drawing to foundation pit annular brace.
A kind of earthwork digging method of foundation pit annular brace carries out layer-by-layer digging mode progress using to foundation pit, such as Fig. 1 institute
Show, include following steps:
S1, base pit dewatering: precipitation was carried out using sand tube well in 20 days before earth excavation, and well spacing is arranged less than 10m, while being enclosed
The every 20m in protection structure outer periphery beats a bite pressure reduction well.
The 1st layer of earth excavation of S2, foundation pit: central shoring region, and symmetrical excavation are first excavated, then central excavation island domain；First
Excavation construction, the earthwork are transported to outside foundation pit section trestle ramp by foundation pit west side soil outlet simultaneously with annular brace；It has excavated
Cheng Hou is supported, and branch in annular as shown in connection with fig. 2 in the circular inner support structure 1 of the region construction current layer excavated
Support structure 1 is bonded to each other by multiple support units 2 and is formed.
In conjunction with shown in Fig. 3 to Fig. 5, wherein the composition of support unit 2 includes the arc panel 21 abutted against with foundation pit inner wall, sets
It is placed in the threaded rod 23, more that arc panel 21 is arranged in hollow piled anchor 22 towards the hollow piled anchor 22 on foundation pit end face, both ends idle running
The length direction equidistant placement and threads turn of a threadingly bar 23 are set to drive block 24 on threaded rod 23, multiple equidistant cunnings
The dynamic link block 25 being set on 24 periphery of drive block and one end correspond the bending being articulated on link block 25 respectively
Bar 26, one end that hollow piled anchor 22 is connected to foundation pit direction are set as pointed, and the other end and arc panel 21 are hinged.
In conjunction with shown in Fig. 3 to Fig. 5, it is provided with guided way 241 along hollow 22 length direction of piled anchor in drive block 24, it is multiple
Guided way 241 circumferentially shape equidistant placement on the periphery of hollow piled anchor 22；The cross section of guided way 241 is in isosceles trapezoid shape
Setting, and the upper bottom edge of guided way 241 is integrally fixedly connected with drive block 24, is provided on link block 25 and guided way
241 guide grooves 251 matched, link block 25 are corresponded by guide groove 251 in oriented sliding on guided way 241.
In conjunction with shown in Fig. 5 and Fig. 6, limited block 27, limited block 27 and drive block 24 are provided at the both ends of guided way 241
It is integrally fixedly connected, realizes that the limit of link block 25 slides on drive block 24, making its bending bar 26, circumferentially shape is arranged in driving
On the periphery of block 24.
In conjunction with shown in Fig. 5 and Fig. 6, recessing groove 221, the folding of bending bar 26 are offered on the circumferential side wall of hollow piled anchor 22
Turn of bilge is articulated on the cell wall of recessing groove 221；Recessing groove 221 arranges that bending bar 26 is separate to be connect with link block 25 in counterbore shape
One end be set as the boss-shaped matched with recessing groove 221, and when original state, the other end of bending bar 26 is mounted and sealed
In on recessing groove 221,26 outer end face of bending bar at the end and the periphery flush arrangement of hollow piled anchor 22.
In conjunction with shown in Fig. 5 and Fig. 6, grouting port 211 is offered on arc panel 21, when hollow piled anchor 22 is plugged in foundation pit
When in side wall, by rotating threaded rod 23, so that its drive block 24 is in hollow piled anchor 22 and insert interior relative motion, promote bending bar 26
It is rotated on recessing groove 221, recessing groove 221 is opened, and bending bar 26 is unfolded and is plugged in the side wall of foundation pit；Pass through grouting port
211 are injected into mixed mud slurries in hollow piled anchor 22, make mixed mud slurries from the filling of recessing groove 221 in the side wall of foundation pit with
It is condensed, and has the function that for hollow piled anchor 22 to be fixed in foundation pit, is improved support unit 2 and is fixed on the structural strength on foundation pit
And stability of strutting system.
In conjunction with shown in Fig. 5 and Fig. 6, in order to improve stability when bending bar 26 is plugged in foundation pit side-wall, bending bar 26
Angle direction and hollow piled anchor 22 be plugged in the direction reversed arrangement in foundation pit；Meanwhile in arc panel 21 towards bottom of foundation ditch
End face offers accommodating chamber 212, and sliding is provided with extension board 28 in accommodating chamber 212, in arc panel 21 away from foundation pit side-wall
Stroke groove 213 is offered on end face, stroke groove 213 communicates arrangement with accommodating chamber 212, and behaviour is fixedly connected on extension board 28
Make block 281, the sliding of operating block 281 is arranged in stroke groove 213 and protrudes from and arranges outside 213 notch of stroke groove；When arc panel 21
When being installed on the side wall of foundation pit, extension board 28 is slid out outside stroke groove 213 by driving operating block 281, and be plugged in base
The substrate in hole improves arc panel 21 and is supported in the stability of strutting system in foundation pit.
The 2nd layer of earth excavation of S3, foundation pit: being first arranged in foundation pit southern side and soil outlet and backfill pool slag road, then carries out the
Two sections of trestle ramps and quadrangle central shoring regional earthwork excavate, and all cubic metres of earth of vehicles pass through the pool slag road and enter in hole, by digging
Machine entrucking is unearthed, and the central island earthwork is from the distant to the near to moving back digging at the soil outlet of southern side；After the completion of excavation, construct in the region excavated
The circular inner support structure 1 of current layer is supported；And 21 upper end of arc panel in this layer of circular inner support structure 1 and foundation pit the
21 lower end surface of arc panel of 1 layer of earth excavation is bonded arrangement.
The 3rd layer of earth excavation of S4, foundation pit: it is used as first with second segment trestle ramp and takes native channel, and avoided level and take
Native position of platform setting pool slag road extends to foundation pit quadrangle, enters the traffic route in foundation pit, annular brace as earthwork vehicle
Region and trestle level take native platform excavation construction simultaneously, after the completion of trestle level takes native platform, this layer of surplus earth by
Surrounding takes native platform to enter to transport in trestle and be unearthed by level, after the completion of excavation, in the region construction current layer excavated
Circular inner support structure is supported；And the 2nd layer of earthwork in 21 upper end of arc panel in this layer of circular inner support structure 1 and foundation pit is opened
21 lower end surface of arc panel of digging is bonded arrangement.
S5, base plate of foundation pit earth excavation: slag road in the pool first is set to foundation pit quadrangle from trestle levelling bench, makes a cubic metre of earth vehicle
Region can be excavated close to digging machine and take soil, then bottom plate earthwork subregion piecemeal is excavated, and to diggings is moved back at trestle platform, trestle is put down
The earthwork is finally constructed under platform, and entrucking digging machine is parked in level and takes native platform surrounding, and the earthwork under platform is transported to earthwork car and is led to
Trestle is crossed to be unearthed to outside foundation pit.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of earthwork digging method of foundation pit annular brace, which is characterized in that successively excavated to foundation pit, include following
Step:
S1, base pit dewatering: precipitation was carried out using sand tube well in 20 days before earth excavation, and well spacing is arranged less than 10m, while being enclosed
The every 20m in protection structure outer periphery beats a bite pressure reduction well；
The 1st layer of earth excavation of S2, foundation pit: central shoring region, and symmetrical excavation are first excavated, then central excavation island domain, first segment stack
Bridge ramp and annular brace excavation construction simultaneously, the earthwork is transported to outside foundation pit by foundation pit west side soil outlet, after the completion of excavation,
Excavated region construction current layer circular inner support structure (1) be supported, and the circular inner support structure (1) by
Multiple support unit (2) compositions；
The 2nd layer of earth excavation of S3, foundation pit: soil outlet first is set in foundation pit southern side and backfills pool slag road, then carries out second segment
Trestle ramp and quadrangle central shoring regional earthwork excavate, and all cubic metres of earth of vehicles pass through the pool slag road and enter in hole, filled by digging machine
Vehicle is unearthed, and the central island earthwork is from the distant to the near to moving back diggings at the soil outlet of southern side, after the completion of excavation, the region construction excavated currently
The circular inner support structure (1) of layer is supported；
The 3rd layer of earth excavation of S4, foundation pit: being used as first with second segment trestle ramp and take native channel, and avoids level and take soil flat
Platform position setting pool slag road extends to foundation pit quadrangle, enters the traffic route in foundation pit, annular brace region as earthwork vehicle
Native platform excavation construction simultaneously is taken with trestle level, after the completion of trestle level takes native platform, this layer of surplus earth is by surrounding
It takes native platform to enter transport in trestle by level to be unearthed, after the completion of excavation, described in the region construction current layer excavated
Circular inner support structure (1) is supported；
S5, base plate of foundation pit earth excavation: being first arranged pool slag road to foundation pit quadrangle from trestle levelling bench, makes cubic metre of earth vehicle can be with
Region is excavated close to digging machine and takes soil, then bottom plate earthwork subregion piecemeal is excavated, and to moving back digging at trestle platform, under trestle platform
The last construction of the earthwork, entrucking digging machine are parked in level and take native platform surrounding, the earthwork under platform is transported to earthwork car and passes through stack
Bridge is unearthed to outside foundation pit.
2. the earthwork digging method of foundation pit annular brace according to claim 1, it is characterised in that: the support unit
(2) composition includes the arc panel (21) abutted against with foundation pit inner wall, is set to arc panel (21) towards the hollow stake on foundation pit end face
Anchor (22), the threaded rod (23) that is arranged in hollow piled anchor (22) of rotation, threads turn are set to the driving on threaded rod (23)
The link block (25) and one end that block (24), limit are slideably positioned on drive block (24) are articulated with the bending on link block (25)
Bar (26) offers recessing groove (221), the bending part of the bending bar (26) on the circumferential side wall of the hollow piled anchor (22)
It is articulated on the cell wall of recessing groove (221), and the other end of bending bar (26) is mounted and sealed in recessing groove when original state
(221) on, and grouting port (211) are offered on the arc panel (21).
3. the earthwork digging method of foundation pit annular brace according to claim 2, it is characterised in that: in the drive block
(24) guided way (241) are provided with along hollow piled anchor (22) length direction, are provided with guide groove on the link block (25)
(251), the link block (25) is set on guided way (241) by guide groove (251) oriented sliding.
4. the earthwork digging method of foundation pit annular brace according to claim 3, it is characterised in that: the guided way
(241) cross section is arranged in isosceles trapezoid shape, and the upper bottom edge of guided way (241) is integrally fixedly connected with drive block (24),
And be provided with limited block (27) at the both ends of the guided way (241), the limited block (27) and drive block (24) are integrally solid
Fixed connection.
5. the earthwork digging method of foundation pit annular brace according to claim 2, it is characterised in that: the recessing groove
(221) it is arranged in counterbore shape, described separate one end connecting with link block (25) of bending bar (26) is set as and recessing groove (221)
The boss-shaped matched.
6. according to the earthwork digging method of foundation pit annular brace described in claim 2-5 any one, it is characterised in that: in institute
It states and is provided with multiple drive blocks (24) on threaded rod (23), and the drive block (24) is respectively connected with the bending bar
(26).
7. according to the earthwork digging method of foundation pit annular brace described in claim 2-5 any one, it is characterised in that: described
The angle direction and hollow piled anchor (22) of bending bar (26) are plugged in the direction reversed arrangement in foundation pit.
8. according to the earthwork digging method of foundation pit annular brace described in claim 2-5 any one, it is characterised in that: described
Bending bar (26) is provided with multiple, and circumferentially shape is arranged in the peripheries of the drive block (24) to multiple bending bars (26)
On.
9. the earthwork digging method of foundation pit annular brace according to claim 2, it is characterised in that: the hollow piled anchor
(22) one end for being connected to foundation pit direction is set as pointed.
10. the earthwork digging method of foundation pit annular brace according to claim 2, it is characterised in that: in the arc panel
(21) accommodating chamber (212) are offered towards the end face of bottom of foundation ditch, sliding is provided with extension board in the accommodating chamber (212)
(28), the arc panel (21) away from foundation pit side-wall end face on offer stroke groove (213), the stroke groove (213) with
Accommodating chamber (212) communicates arrangement, is fixedly connected on the extension board (28) operating block (281), and the operating block (281) is sliding
It is dynamic to be arranged on stroke groove (213) and protrude from arrangement outside stroke groove (213) notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811586604.3A CN109680691B (en) | 2018-12-25 | 2018-12-25 | Earth excavation method for annular support of foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811586604.3A CN109680691B (en) | 2018-12-25 | 2018-12-25 | Earth excavation method for annular support of foundation pit |
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| CN109680691A true CN109680691A (en) | 2019-04-26 |
| CN109680691B CN109680691B (en) | 2021-04-06 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158604A (en) * | 2019-06-19 | 2019-08-23 | 北京城建北方集团有限公司 | Support construction method at foundation pit riding track |
| CN110593275A (en) * | 2019-09-04 | 2019-12-20 | 浙江化工工程地质勘察院有限公司 | Foundation pit support system |
| CN111784123A (en) * | 2020-06-12 | 2020-10-16 | 江苏省广电有线信息网络股份有限公司南京分公司 | Building block model-based broadcast and television pipeline engineering cost fine generation method |
| CN113668548A (en) * | 2021-07-28 | 2021-11-19 | 中国建筑一局(集团)有限公司 | Narrow foundation pit ramp supporting structure and construction method |
| CN114032910A (en) * | 2021-07-28 | 2022-02-11 | 中国建筑一局(集团)有限公司 | Narrow foundation pit ramp structure and unearthing method using same |
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| CN114319444A (en) * | 2022-01-10 | 2022-04-12 | 中铁工程装备集团有限公司 | Shaft construction method and device |
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| CN110158604A (en) * | 2019-06-19 | 2019-08-23 | 北京城建北方集团有限公司 | Support construction method at foundation pit riding track |
| CN110158604B (en) * | 2019-06-19 | 2021-07-02 | 北京城建北方集团有限公司 | Construction method of supporting structure at underpass of foundation pit |
| CN110593275A (en) * | 2019-09-04 | 2019-12-20 | 浙江化工工程地质勘察院有限公司 | Foundation pit support system |
| CN110593275B (en) * | 2019-09-04 | 2021-03-19 | 浙江化工工程地质勘察院有限公司 | Foundation pit support system |
| CN111784123A (en) * | 2020-06-12 | 2020-10-16 | 江苏省广电有线信息网络股份有限公司南京分公司 | Building block model-based broadcast and television pipeline engineering cost fine generation method |
| CN113668548A (en) * | 2021-07-28 | 2021-11-19 | 中国建筑一局(集团)有限公司 | Narrow foundation pit ramp supporting structure and construction method |
| CN114032910A (en) * | 2021-07-28 | 2022-02-11 | 中国建筑一局(集团)有限公司 | Narrow foundation pit ramp structure and unearthing method using same |
| CN114032910B (en) * | 2021-07-28 | 2023-10-03 | 中建一局集团华南建设有限公司 | Narrow foundation pit ramp structure and soil discharging method using same |
| CN114197553A (en) * | 2021-12-27 | 2022-03-18 | 上海市机械施工集团有限公司 | Foundation pit excavation device and method |
| CN114319444A (en) * | 2022-01-10 | 2022-04-12 | 中铁工程装备集团有限公司 | Shaft construction method and device |
| CN114319444B (en) * | 2022-01-10 | 2023-12-01 | 中铁工程装备集团有限公司 | Shaft construction method and device |
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