CN108331584A - Earthwork digging method under a kind of pipe curtain - Google Patents
Earthwork digging method under a kind of pipe curtain Download PDFInfo
- Publication number
- CN108331584A CN108331584A CN201711481446.0A CN201711481446A CN108331584A CN 108331584 A CN108331584 A CN 108331584A CN 201711481446 A CN201711481446 A CN 201711481446A CN 108331584 A CN108331584 A CN 108331584A
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- support
- area
- described piece
- soil body
- frost wall
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
Abstract
Earthwork digging method under a kind of pipe curtain of the present invention, is related to underground engineering construction technical field.For there are problems that complicated construction technique, security risk are more in existing soft clay area pipe-roof method work progress, be affected to top soil disturbance.Steps are as follows：Grating type frozen construction is implemented to the soil body below pipe curtain, excavates the soil body in block area one and block area two successively to jump storehouse digging mode, supporting apparatus is installed between the top and bottom frost wall in block area；Excavate the soil body among the frost wall of top and support one is installed；Excavate the top frost wall both sides residue soil body, is supporting both sides installation support two respectively, making to offset with support two at the top of supporting apparatus；Excavate the side frost wall between block area one and block area two, and the installation support three between two neighboring support two, integral horizontally-supported of support one, support two and three connection of support；Gradually implement earth excavation and Construction of Supporting along the length direction of pipe curtain repeatedly.
Description
Technical field
The present invention relates to underground engineering construction technical field, more particularly to a kind of pipe considering soil body composite support effect
The lower earthwork digging method of curtain.
Background technology
Pipe-roof method is a kind of novel shallow mining method technology, its Construction Principle is the profit between starting well and received well
With pipe jacking equipment by the steel pipe jacking soil body, connect to forming pipe row by fore shaft between each steel pipe, and water-stop is injected in fore shaft gap
To reach sealing requirement, then, underground structure is applied under the protection of pipe curtain.
In the pipe-roof method work progress of soft clay area, pipe-roof method is mostly combined with box culvert jacking construction technique, in box culvert knot
Structure successively jacking while, by the supporting role of box culvert structure, gradually dig out the soil body in box culvert structure, be finally completed pushing tow
Construction of replacing；Either by the supporting role of arch tube curtain, interim branch is combined in the way of the earthwork partial excavation such as benching tunnelling method
Support system completes earth excavation operation under pipe curtain.The working procedure that pipe-roof method is combined with box culvert jacking construction technique is more numerous
Trivial, incremental launching construction complex process, security risk is more；The earth excavation technique of arch tube curtain combination temporary support system, for soft
Native regional adaptability is poor, moreover, arch tube curtain wastes construction space, it is larger to the disturbing influence of necromancer body thereon.
Invention content
For in existing soft clay area pipe-roof method work progress there are complicated construction technique, security risk it is more, to upper necromancer
The larger problem of body disturbing influence.The object of the present invention is to provide earthwork digging methods under a kind of pipe curtain, to being waited out below pipe curtain
Excavator body takes grating type frozen construction, and combines and jump storehouse method and implement earth excavation construction successively, is utilized and existing freezes the soil body
Supporting role, reduce disturbing influence caused by adjacent soil excavation, and avoid dangerous caused by the unordered excavation of the soil body
Hidden danger.
The technical solution adopted by the present invention to solve the technical problems is：Earthwork digging method under a kind of pipe curtain, step is such as
Under：
S1：Grating type frozen construction is implemented to the soil body below pipe curtain, the soil body below the pipe curtain is divided into grid-like
Several block areas, are spaced piece of area one and block area two, and described piece of one soil body of area is not freeze the soil body, described piece of area two
The soil body is to freeze the soil body, and frost wall is formed behind described piece of area one and described piece of two surrounding freezing soil of area, calculates analysis and determines institute
The size of the excavation size and described piece of area one and described piece of two surrounding frost wall of area in the areas Shu Kuai one and described piece of area two；
S2：Excavated in described piece of area one with to jump storehouse digging mode and does not freeze the soil body, the top frost wall in described piece of area one
Supporting apparatus is installed between the frost wall of bottom, then, then excavates the soil for being restored to non-frozen state in described piece of area two
Body installs supporting apparatus between the top frost wall and bottom frost wall in described piece of area two；
S3：Excavate the position soil body among described piece of area one and described piece of two top frost wall of area and installs horizontally disposed
Support one, one bottom of the support is by perpendicular affixed interim strut support in bottom frost wall；
S4：The remaining soil body for excavating two top frost wall both sides of described piece of area one and described piece of area, respectively in the support
The horizontally disposed support two of one both sides installation, and the support one and the support two are affixed, make the supporting apparatus
Top offsets with the support two, removes the interim strut；
S5：Excavate the side frost wall between described piece of area one and described piece of area two, and in the two neighboring support two
Between installation support three, and the support one, support two and support three are connected into the horizontally-supported of entirety；
S6：Step S2 to S5 is repeated, the length direction along the pipe curtain gradually implements earth excavation and Construction of Supporting.
Preferably, in the step S2, the supporting apparatus includes by least four montants and being connected to adjacent two
The chassis body that diagonal brace between montant described in root is constituted, described piece of area one or institute are installed on along the length direction of the pipe curtain
A pair of of sliding rail on two bottom frost wall of the areas Shu Kuai, and at least four sliding supports of the montant bottom are connected to,
The groove of the sliding support matches with the sliding rail.
Preferably, in the step S2, first freeze in described piece of area one, the top frost wall in described piece of area two and bottom
At least four montants are installed between wall, after the step S4 all excavates the top frost wall and installs the support two,
Diagonal brace is assembled between adjacent two montants to constitute chassis body, and the montant top is made to offset with the support two.
Preferably, in the step S6, along the pipe curtain length direction setting two neighboring described piece of area sliding rail it
Between be threadedly coupled.
Preferably, it in the step S4, is respectively mounted at the top of every montant of the supporting apparatus there are one vertical position
Compensation device is moved, the vertical displacement compensation device includes hydraulic cylinder, support base, mandril, at least two supporting racks, at least two
A latch segment, at least two self-locking oil cylinders and PLC control unit, the piston rod of one end of the mandril and the hydraulic cylinder
It is bolted, the other end of the mandril and the bottom of the support two offset, and the support base is sheathed on the outside of the mandril
And be bolted with the hydraulic cylinder, at least two support frames as described above are distributed in the support base outer wall and affixed, each described
A self-locking oil cylinder is respectively mounted on supporting rack, one end of the self-locking oil cylinder and the end plate of support frame as described above are hinged, the self-locking
The other end of oil cylinder and semicircular latch segment pin connection, two latch segments are oppositely arranged and are sheathed on outside the mandril
Side, the guide groove of the latch segment inner wall and the card tooth of the mandril outer wall are intermeshed, and displacement sensing is equipped in the hydraulic cylinder
Device, and institute's displacement sensors are connect with the PLC control unit signal；When the vertical displacement compensation device and the branch
When the gap of support two is excessive, signal is fed back to the P LC control units, the PLC control unit hair by institute's displacement sensors
Going out instruction makes the piston rod of the hydraulic cylinder stretch out so that self-locking after the mandril is moved up and offseted with the support two；
When the vertical displacement compensation device and the too small gap of the support two, the PLC control unit send out instruction make it is described
The piston rod of hydraulic cylinder is shunk so that self-locking after the mandril is moved down and offseted with the support two.
Effect of the invention is that：Earthwork digging method under the pipe curtain of the present invention considers soil body composite support effect
It answers, grating type frozen construction is taken to the soil body to be excavated below pipe curtain, and jump storehouse method is combined to implement earth excavation construction successively,
The existing supporting role for freezing the soil body is maximally utilised, the stress of supporting apparatus can be reduced, has reduced it and support structure
The area of section of part so that Construction of Supporting is physically easier to perform；Storehouse method is jumped while realizing continuous productive process, reduces adjacent soil
Disturbing influence caused by body excavates ensure that the stability that earth excavation is constructed in small space under the pipe curtain of soft clay area, avoid
Hidden danger caused by the soil body unordered excavation.
Description of the drawings
Fig. 1 to Fig. 6 be one embodiment of the invention pipe curtain under each construction procedure of earthwork digging method schematic diagram；
Fig. 7 is the structural schematic diagram of the vertical displacement compensation device of one embodiment of the invention.
Figure label is as follows：
Block area 1；Block area 22；Pipe curtain 10；Underground exterior-protected structure 11；Sliding rail 21；Sliding support 22；Montant 23；It is horizontal
Support 24；Support a 24a；Support two 24b；Support three 24c；Interim strut 25；Diagonal brace 26；Top frost wall 32；Freeze bottom
Wall 31；Side frost wall 33；
Vertical displacement compensation device 27；Hydraulic cylinder 271；Support base 272；Mandril 273；Supporting rack 274；End plate 275；From
Lock oil cylinder 276；Latch segment 277.
Specific implementation mode
Earthwork digging method under a kind of pipe curtain proposed by the present invention is made below in conjunction with the drawings and specific embodiments further
It is described in detail.According to following explanation and claims, advantages and features of the invention will become apparent from.It should be noted that attached
Figure is all made of very simplified form and uses non-accurate ratio, only to convenient, lucidly the aid illustration present invention is real
Apply the purpose of example.For sake of convenience, "upper" described below, "lower" are consistent with the upper and lower direction of attached drawing, but this cannot
As the limitation of technical solution of the present invention.
The present embodiment combination freezing process and jump storehouse method are constructed, and freezing process is will underground space surrounding soil be excavated
In water freeze as ice and freeze the soil body with what the soil body was glued together into design profile, to resist soil pressure and every
Exhausted underground water freezes the soil body and creates good carrying and sealing performance, and for the underground space service for constructing new, construction is completed
Afterwards, freezing pipe is pulled out as needed, and non-frozen state will be gradually restored to by freezing the soil body.Jump storehouse method is will underground sky be excavated
Between be divided into several block areas, and in such a way that interval is constructed, while realizing continuous productive process reducing the adjacent soil body opens
Disturbing influence caused by digging.
Illustrate earthwork digging method under a kind of pipe curtain of the present invention with reference to Fig. 1 to Fig. 6, is as follows：
S1：Excavate the active well of pipe curtain to be onstructed region both sides, i.e. starting well and received well (not shown), construction
The underground exterior-protected structure 11 in pipe curtain to be onstructed region applies pipe curtain 10 again；Implement grating type to the 10 lower section soil body of pipe curtain to freeze to apply
The 10 lower section soil body of pipe curtain is divided into several grid-like block areas by work, i.e. spaced piece of one 1 He of area as shown in Fig. 1
Block area 22, one 1 soil body of block area are not freeze the soil body, and 22 soil body of block area is to freeze the soil body, block area 1 and 22 surrounding of block area soil
Body forms frost wall after freezing, calculate and analyze the excavation size for determining block area 1 and block area 22 and block area 1 and block area
The size of 22 surrounding frost walls；
S2：As shown in Fig. 2, using storehouse excavation construction process is jumped, do not freeze the soil body in first exploded slice area 1, in block area one
Supporting apparatus is installed between 1 top frost wall 32 and bottom frost wall 31, then, as shown in figure 3, pulling out block area 22
Freezing pipe, then the soil body that non-frozen state is restored in block area 22 is excavated, in the top frost wall 32 in block area 22 and bottom
Supporting apparatus is installed between frost wall 31；
S3：As shown in figure 4, under the supporting role of supporting apparatus, excavates block area 1 and 22 top of block area is freezed
The 32 intermediate position soil body of wall simultaneously installs one 24a of horizontally disposed support, and one bottoms 24a of support are faced by perpendicular affixed
When strut 25 be supported in bottom frost wall 31；
S4：As shown in figure 5, excavating the remaining soil body of 32 both sides of block area 1 and 22 top frost wall of block area, propping up respectively
The both sides 24a installation two 24b of horizontally disposed support are supportted, and support a 24a and two 24b of support affixed, make supporting apparatus
Top with support two 24b offset, remove interim strut 25；
S5：As shown in fig. 6, excavate the side frost wall 33 between block area 1 and block area 22, and in two neighboring support
Three 24c of installation support between two 24b so that one 24a of support, two 24b and three 24c of support is supported to connect into the water of an entirety
Flat support 24, horizontally-supported 24 is made of shaped steel or armored concrete；
S6：Step S2 to S5 is repeated, the length direction along pipe curtain 10 gradually implements earth excavation and Construction of Supporting, in soil
After side is excavated, next step working procedure, such as underground structure are carried out along work or the construction of lower section soil excavation.
Earthwork digging method under the pipe curtain of the present invention, considers soil body composite support effect, waits out 10 lower section of pipe curtain
Excavator body takes grating type frozen construction, and jump storehouse method is combined to implement earth excavation construction successively, has maximally utilised
There is the supporting role for freezing the soil body, the stress of supporting apparatus can be reduced, reduces the area of section of its supporting member so that
Construction of Supporting is physically easier to perform；Storehouse method is jumped while realizing continuous productive process, shadow is disturbed caused by reducing adjacent soil excavation
It rings, ensure that the stability that earth excavation is constructed in the 10 times small spaces of pipe curtain of soft clay area, avoid the unordered excavation of the soil body and lead
The hidden danger of cause.
In above-mentioned steps S2, supporting apparatus includes by least four montants 23 and being connected to adjacent two montants 23
Between diagonal brace 26 constitute chassis body, be installed on block area 1 or 22 bottom of block area along the length direction of pipe curtain 10 and freeze
A pair of of sliding rail 21 on wall 31, and at least four sliding supports 22 of 23 bottom of montant are connected to, sliding support 22
Groove matches with sliding rail 21 so that chassis body can need to move along sliding rail 21 according to construction, preferably, the present embodiment
Crossing brace is installed between adjacent two montants 23 and forms chassis body, structure is more reliable and more stable.
Supporting apparatus can be installed on after overall package in block area, certainly, in order to be more convenient for transport and construct,
Can by each component of supporting apparatus in block area on-site consolidation, specifically, in step s 2, the areas Xian Kuai 1, block
At least four montants 23 are installed between the top frost wall 32 and bottom frost wall 31 in area 22 and play temporary support, wait for step
After S4 all excavates top frost wall 32 and installs two 24b of support, diagonal brace 26 is assembled between adjacent two montants 23 to constitute
The more stable chassis body of structure makes 23 top of montant offset with two 24b of support.
In above-mentioned steps S6, it is threadedly coupled between the sliding rail 21 in two neighboring piece of area of 10 length direction of pipe curtain setting,
Sliding rail 21 can need Fast Installation and dismounting according to construction, to realize the recycling of sliding rail 21, the sliding rail of the present embodiment
21 are made of shaped steel.
As shown in fig. 7, in above-mentioned steps S4, the top of every montant of supporting apparatus 23 is respectively mounted that there are one vertical
Displacement compensation device 27, vertical displacement compensation device 27 include hydraulic cylinder 271, support base 272, mandril 273, at least two
Support 274, at least two latch segments 277, at least two self-locking oil cylinders 276 and PLC control unit (not shown), top
One end of bar 273 and the piston rod of hydraulic cylinder 271 are bolted, and the bottom of the other end and two 24b of support of mandril 273 offsets,
Support base 272 is sheathed on 27 3 outside of mandril and is bolted with hydraulic cylinder 271, and at least two supporting racks 274 are distributed in support
272 outer walls of seat are simultaneously affixed, and a self-locking oil cylinder 276, one end of self-locking oil cylinder 276 and support are respectively mounted on each supporting rack 274
The end plate 275 of frame 274 is hinged, the other end of self-locking oil cylinder 276 and 277 pin connection of semicircular latch segment, two latch segments
277 are oppositely arranged and are sheathed on 273 outside of mandril, and the card tooth of the guide groove and 273 outer wall of mandril of 277 inner wall of latch segment is mutually nibbled
It closes, displacement sensor is equipped in hydraulic cylinder 271, and displacement sensor is connect with P LC control unit signals.
When the gap between two 24b of vertical displacement compensation device 27 and support is excessive, displacement sensor feeds back signal
To PLC control unit, PLC control unit, which is sent out, opens mechanical self-latching instruction, and the piston rod retraction of self-locking oil cylinder 276 drives two
A latch segment 277 moves round about, and then, PLC control unit, which sends out instruction, makes the piston rod of hydraulic cylinder 271 stretch out, and makes
It obtains mandril 273 to move up and two 24b is supported to offset, PLC control units send out self-locking instruction, make the piston of self-locking oil cylinder 276
It stretches out, two pieces of latch segments 277 is driven to move towards 273 position of locking mandril；On the contrary, working as vertical displacement compensation device 27 and water
When the gap of flat support 24 is too small, PLC control unit, which sends out instruction, makes the piston rod of hydraulic cylinder 271 shrink so that mandril 273
Self-locking after moving down and offseting with two 24b of support.As it can be seen that high-precision displacement sensor can to supporting apparatus with
Spacing between horizontally-supported 24 carries out real-time data acquisition and analysis, and controls mandril 273 by PLC control unit and stretch
Realize the intelligent compensation of supporting apparatus vertical displacement, it is easy to operate, and also degree of regulation is high.The present embodiment it is vertical
The structure of displacement compensation device 27 is only an example, it is not limited to this.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to right.
Claims (5)
1. earthwork digging method under a kind of pipe curtain, which is characterized in that steps are as follows：
S1：Grating type frozen construction is implemented to the soil body below pipe curtain, the soil body below the pipe curtain is divided into grid-like several
The areas Ge Kuai are spaced piece of area one and block area two, and described piece of one soil body of area is not freeze the soil body, and described piece of two soil body of area is
Freeze the soil body, form frost wall behind described piece of area one and described piece of two surrounding freezing soil of area, calculates analysis and determine described piece of area
One and the excavation size in described piece of area two and the size in described piece of area one and described piece of two surrounding frost wall of area；
S2：Excavated in described piece of area one with to jump storehouse digging mode and does not freeze the soil body, the top frost wall in described piece of area one and bottom
Supporting apparatus is installed between portion's frost wall, then, then excavates the soil body for being restored to non-frozen state in described piece of area two,
Supporting apparatus is installed between the top frost wall and bottom frost wall in described piece of area two；
S3：Excavate the position soil body among described piece of area one and described piece of two top frost wall of area and horizontally disposed support is installed
One, one bottom of the support is by perpendicular affixed interim strut support in bottom frost wall；
S4：The remaining soil body of two top frost wall both sides of described piece of area one and described piece of area is excavated, respectively in the support one or two
The horizontally disposed support two of side installation, and the support one and the support two are affixed, make the top of the supporting apparatus
It offsets with the support two, removes the interim strut；
S5：Excavate the side frost wall between described piece of area one and described piece of area two, and between the two neighboring support two
Installation support three, and the support one, support two and support three are connected into the horizontally-supported of entirety；
S6：Step S2 to S5 is repeated, the length direction along the pipe curtain gradually implements earth excavation and Construction of Supporting.
2. earthwork digging method under pipe curtain according to claim 1, it is characterised in that：It is described interim in the step S2
Support device includes the chassis body being made of at least four montants and the diagonal brace being connected between adjacent two montants, edge
The length direction of the pipe curtain is installed on a pair of of sliding rail on described piece of area one or described piece of two bottom frost wall of area, and respectively
At least four sliding supports of the montant bottom are connected to, the groove of the sliding support matches with the sliding rail.
3. earthwork digging method under pipe curtain according to claim 2, it is characterised in that：In the step S2, first described
Block area one, described piece of area two top frost wall and bottom frost wall between at least four montants are installed, wait for that the step S4 is complete
After portion excavates the top frost wall and installs the support two, diagonal brace is assembled between adjacent two montants to constitute frame
Frame body makes the montant top offset with the support two.
4. earthwork digging method under pipe curtain according to claim 1, it is characterised in that：In the step S6, along the pipe
It is threadedly coupled between the sliding rail in the two neighboring described piece of area of curtain length direction setting.
5. earthwork digging method under pipe curtain according to any one of claims 1 to 4, it is characterised in that：In the step S4,
It is respectively mounted at the top of every montant of the supporting apparatus there are one vertical displacement compensation device, the vertical displacement compensation fills
It sets including hydraulic cylinder, support base, mandril, at least two supporting racks, at least two latch segments, at least two self-locking oil cylinders, and
PLC control unit, one end of the mandril and the piston rod of the hydraulic cylinder are bolted, the other end of the mandril with it is described
The bottom of support two offsets, and the support base is sheathed on the outside of the mandril and is bolted with the hydraulic cylinder, at least two
Support frame as described above is distributed in the support base outer wall and affixed, and a self-locking oil cylinder is respectively mounted on each support frame as described above, described
One end of self-locking oil cylinder and the end plate of support frame as described above are hinged, and the other end of the self-locking oil cylinder connects with semicircular latch segment pin
It connects, two latch segments are oppositely arranged and are sheathed on the outside of the mandril, guide groove and the mandril of the latch segment inner wall
The card tooth of outer wall is intermeshed, and displacement sensor is equipped in the hydraulic cylinder, and institute's displacement sensors and PLC controls are single
First signal connection；When the vertical displacement compensation device and the excessive gap of the support two, institute's displacement sensors will be believed
The PLC control unit number is fed back to, the PLC control unit, which sends out instruction, makes the piston rod of the hydraulic cylinder stretch out so that
Self-locking after the mandril is moved up and offseted with the support two；When the vertical displacement compensation device and the support two
When gap is too small, the PLC control unit, which sends out instruction, makes the piston rod of the hydraulic cylinder shrink so that the mandril is to moving down
Self-locking after moving and offseting with the support two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481446.0A CN108331584B (en) | 2017-12-29 | 2017-12-29 | Earthwork digging method under a kind of pipe curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481446.0A CN108331584B (en) | 2017-12-29 | 2017-12-29 | Earthwork digging method under a kind of pipe curtain |
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| Publication Number | Publication Date |
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| CN108331584A true CN108331584A (en) | 2018-07-27 |
| CN108331584B CN108331584B (en) | 2019-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711481446.0A Active CN108331584B (en) | 2017-12-29 | 2017-12-29 | Earthwork digging method under a kind of pipe curtain |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962613A (en) * | 2021-02-19 | 2021-06-15 | 济南轨道交通集团有限公司 | Sedimentation automatic compensation type foundation pit-crossing underground pipeline protection construction method and system |
| CN115492161A (en) * | 2022-07-01 | 2022-12-20 | 上海建工一建集团有限公司 | Construction method for storey-adding three-side enclosing pipe curtain of existing building basement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962613A (en) * | 2021-02-19 | 2021-06-15 | 济南轨道交通集团有限公司 | Sedimentation automatic compensation type foundation pit-crossing underground pipeline protection construction method and system |
| CN115492161A (en) * | 2022-07-01 | 2022-12-20 | 上海建工一建集团有限公司 | Construction method for storey-adding three-side enclosing pipe curtain of existing building basement |
| CN115492161B (en) * | 2022-07-01 | 2023-11-14 | 上海建工一建集团有限公司 | Construction method for building basement storey-adding three-side surrounding pipe curtain of existing building |
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| Publication number | Publication date |
|---|---|
| CN108331584B (en) | 2019-11-15 |
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