CN206668268U - A kind of sliceable advanced tubule and its advance support connecting structure - Google Patents
A kind of sliceable advanced tubule and its advance support connecting structure Download PDFInfo
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- CN206668268U CN206668268U CN201720294385.6U CN201720294385U CN206668268U CN 206668268 U CN206668268 U CN 206668268U CN 201720294385 U CN201720294385 U CN 201720294385U CN 206668268 U CN206668268 U CN 206668268U
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- pilot tunnel
- advanced tubule
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- sliceable
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Abstract
A kind of sliceable advanced tubule and its advance support connecting structure, the body is sequentially spliced by the steel pipe of three sections, blossom type interval is drilled with slurry outlet on the tube wall of body, three sections are followed successively by a section leading portion, the quasi- section of an at least feast-brand mark and a section endpiece, pass through the connection of the internal thread set and external screw thread progress end to end that cooperates between each section, the termination of leading portion is in pointed cone type, endpiece is reserved with to tail end from its middle part not to be set only slurry section, the tail end of endpiece of slurry outlet and is welded with a circle iron hoop.This advance support connecting structure, including upper pilot tunnel advance support, upper pilot tunnel side wall preliminary bracing, the horizontal median septum of upper pilot tunnel, the lock foot anchoring stock of upper pilot tunnel, lower pilot tunnel advanced levels supporting, country rock and advanced tubule on the outside of lower pilot tunnel.The utility model takes full advantage of pilot tunnel space, carries out oblique reinforcing to lower pilot tunnel by ductule out of upper pilot tunnel, consolidation effect is preferable, can effectively accelerate the construction period.
Description
Technical field
Sliceable advanced tubule and its advance support that pilot tunnel under a kind of boring construction uses is the utility model is related to connect
Connect construction.
Background technology
In recent years, with the fast development of national infrastructure construction, various regions descend in large quantities infrastructure start build or
Person sets up, in the route selection, work progress in urban subway station, due to the shadow of the reasons such as pipeline, road, building
Ring, partial sector will inevitably use boring construction, and boring construction is had a great influence by geology, underground utilities.
Generally boring construction is that advanced tubule, middle pipe canopy or steel tube shed are carried out on the outside of structure preliminary bracing
Reinforce, but partly in particular cases, such as in subregion presence：First, due to geology, pipeline or construction location so as to causing
Lower pilot tunnel can not carry out the problem of normal level is to advance support or undesirable supporting effect；2nd, because lower pilot tunnel because it is aqueous compared with
It is abundant to cause soil property softer, and then the problem of cause lower pilot tunnel can not construct or easily be caved in when constructing.If the 3rd, upper pilot tunnel space
Deficiency, then it can not meet that lower pilot tunnel disposably sets the Clearance requirement of ductule, mechanical execution is difficult.
Utility model content
The purpose of this utility model is to provide a kind of sliceable advanced tubule and its advance support connecting structure, under solution
The problem of advanced tubule advance support construction space deficiency of pilot tunnel.
To achieve the above object, the utility model adopts the following technical scheme that：
A kind of sliceable advanced tubule, including body, the body are sequentially spliced by the steel pipe of three sections, pipe
Blossom type interval is drilled with slurry outlet on the tube wall of body, and three sections are followed successively by a section leading portion, the quasi- section of an at least feast-brand mark and a section
Endpiece, by cooperating the internal thread set and external screw thread carries out connection end to end between each section,
The termination of the leading portion is in pointed cone type, and the endpiece is reserved with from its middle part to tail end does not set only starching for slurry outlet
Section, the tail end of the endpiece are welded with a circle iron hoop.
The length of the only slurry section is not less than 30cm.
The spacing of the slurry outlet is 10~20cm, and the eye diameter of slurry outlet is 6-8cm.
The length of the standard section is 1~2m.
A kind of advance support connecting structure of sliceable advanced tubule, including upper pilot tunnel advance support, upper pilot tunnel side wall
Preliminary bracing, the horizontal median septum of upper pilot tunnel, the lock foot anchoring stock of upper pilot tunnel, lower pilot tunnel advanced levels supporting, country rock on the outside of lower pilot tunnel
And advanced tubule,
The advanced tubule avoids pilot tunnel advance support and lower pilot tunnel advanced levels supporting, from upper pilot tunnel preliminary bracing
Inner side pass outwards through pilot tunnel preliminary bracing and anchor into obliquely on the outside of lower pilot tunnel within country rock, until lower pilot tunnel wall to be onstructed
Position below bottom.
The advanced tubule is in a row set along tunneling direction is longitudinally spaced, is provided with continuously out along the outside of lower pilot tunnel
It is multiple rows of.
The advanced tubule obliquely anchor into angle and horizontal plane into angular region be 70~80 °.
The tube pitch that sets of the advanced tubule along tunneling direction is no more than the advanced tubule of upper pilot tunnel
Tube pitch, scope are 0.3~0.5m, and the array pitch of the outside multiple rows of setting in outside of the advanced tubule along lower pilot tunnel is 0.2~0.3m.
The utility model has the characteristics that and beneficial effect compared with prior art：
Advanced tubule in the utility model is prefabricated Spliced type ductule, for upper pilot tunnel insufficient space, nothing
Method meets that lower pilot tunnel sets the Clearance requirement of advanced tubule and designed, and the tune of catheter length can be carried out according to the size of headroom
It is whole, without changing other machinery equipment, increase the safety guarantee of boring construction.
The utility model takes full advantage of pilot tunnel space, and oblique add is carried out to lower pilot tunnel by ductule out of upper pilot tunnel
Gu solving the problem of water rich strata boring construction, the scope of application of boring construction is expanded, consolidation effect is preferable, can be effective
Accelerate the construction period, provide safe and reliable space for lower pilot tunnel operation in boring construction, ensure the safety of workmen.
Brief description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is front segment structure schematic diagram of the present utility model.
Fig. 2 is standard bay structural schematic diagram of the present utility model.
Fig. 3 is endpiece structural representation of the present utility model.
Fig. 4 is three sections of splicing construction schematic diagrames of the present utility model.
Fig. 5 is female thread structure schematic diagram of the present utility model.
Fig. 6 is external thread structure schematic diagram of the present utility model.
Fig. 7 is advanced support structure structural representation of the present utility model.
Reference：1- bodys, 1a- slurry outlets, 1b- leading portions, 1b1- terminations, 1c- standards section, 1d- endpieces,
1d1- only starches section, 2- internal threads, 3- external screw threads, 4- iron hoops, the upper pilot tunnel advance supports of 5-, the upper pilot tunnel side wall branch at initial stage of 6-
Country rock on the outside of pilot tunnel under the supporting of pilot tunnel advanced levels, 10- under shield, the horizontal median septum of the upper pilot tunnels of 7-, 8- lock foot anchoring stocks, 9-,
Pilot tunnel wall bottom, 12- anchor into angle under 11-.
Embodiment
Embodiment is in bustling business location, and tunneling stratum is in the abundant silt clay layer of water content and coarse sands layer
Tunneling is treated, according to Design of Construction Organization, when carrying out boring construction using intersection interval wall approach herein, need to first excavate top two
Individual pilot tunnel, then excavate two pilot tunnels in lower section.Because tunneling region is shorter, final scheme is to be led under being excavated again after the insertion of upper pilot tunnel
Hole.
During construction top heading excavation, it is found that soil property moisture content is larger, the soil body is wet soft, and lower pilot tunnel occurs in digging process
Side wall is caved in, and boring construction danger is larger, and lower pilot tunnel advanced tubule can not construct, and existing measure can not ensure that lower pilot tunnel is applied
Work safety.Again because surface grout injection reinforcing can not be carried out in bustling business location, turn into construction difficult problem.
Referring to shown in Fig. 1-6, a kind of sliceable advanced tubule, including body, the body 1 by three sections steel pipe
Sequentially it is spliced, blossom type interval is drilled with slurry outlet 1a on the tube wall of body, and three sections are followed successively by a section leading portion 1b, at least
The quasi- section 1c of one feast-brand mark and one saves endpiece 1d, is carried out between each section by the internal thread 2 and external screw thread 3 for the setting that cooperates
Connection end to end, the termination 1b1 of the leading portion 1b is in pointed cone type, and the endpiece 1d is reserved with to tail end from its middle part and does not set out slurry
Only slurry the section 1d1, the endpiece 1d in hole tail end are welded with a circle iron hoop 4.
The length of the only slurry section 1d1 is not less than 30cm.The spacing of the slurry outlet 1a is 10~20cm, slurry outlet 1a's
Eye diameter is 6-8cm.The length of the standard section 1c is 1~2m.
It is shown in Figure 7, the advance support connecting structure of this sliceable advanced tubule, including upper pilot tunnel advance support
5th, upper pilot tunnel side wall preliminary bracing 6, the horizontal median septum 7 of upper pilot tunnel, the lock foot anchoring stock 8 of upper pilot tunnel, lower pilot tunnel advanced levels supporting
9th, country rock 10 and advanced tubule on the outside of lower pilot tunnel,
The advanced tubule avoids pilot tunnel advance support 5 and lower pilot tunnel advanced levels supporting 9, from upper branch at pilot tunnel initial stage
Pass outwards through pilot tunnel preliminary bracing on the inside of shield to anchor into obliquely on the outside of lower pilot tunnel within country rock 10, until leading under to be onstructed
Position of the hole wall bottom below 11.
The advanced tubule is in a row set along tunneling direction is longitudinally spaced, is provided with continuously out along the outside of lower pilot tunnel
It is multiple rows of.The advanced tubule obliquely anchor into angle 12 and horizontal plane into angular region be 70~80 °.It is described advanced small to lead
The tube pitch that sets of the pipe along tunneling direction no more than upper pilot tunnel advanced tubule tube pitch, scope be 0.3~
0.5m, the array pitch of the outside multiple rows of setting in outside of the advanced tubule along lower pilot tunnel is 0.2~0.3m.
The advanced support method of pilot tunnel, adoptable construction procedure are as follows under this water rich strata boring construction：
Step 1: being prefabricated in the factory advanced tubule according to design, and it is transported to job site.Using heat in the present embodiment
Steel rolling floral tube, the external diameter of the pipe is 42mm, wall thickness 3.5mm.
Step 2: the surveying and locating on the hole wall of upper pilot tunnel, designs Loft Line, chisel is used after mark is carried out in design hole position
Rock machine or electric coal drill drilling drill along Loft Line, and aperture needs big more than 20mm compared with the caliber of advanced tubule.
Step 3: the progress of advanced tubule is tentatively spliced, passes through splicing according to the size of upper pilot tunnel headroom after pore-forming
To solve the drawbacks of upper pilot tunnel insufficient space.
Step 4: directly by the preliminary advanced tubule spliced by it from the inner side of upper pilot tunnel preliminary bracing, upper pilot tunnel
Country rock is squeezed into obliquely on the outside of the lower area just propped up to lower pilot tunnel, constantly splices advanced tubule, until splicing is advanced small
The length of conduit meets the requirements, and pilot tunnel advance support and lower pilot tunnel advanced levels supporting is avoided when setting advanced tubule, really
Protecting both will not conflict, and set to lower pilot tunnel wall bottom position, generally extend at least h=0.3m below lower pilot tunnel bottom plate~
0.5m。
Step 5: advanced tubule is squeezed into one by one, advanced tubule is in a row by being constructed along tunneling direction interval, under
Multiple rows of to outer room construction on the outside of pilot tunnel, advanced tubule and upper pilot tunnel preliminary bracing anchor connection after squeezing into, both have common group
Into lower pilot tunnel advanced levels support system.
Step 6: carry out slip casting to advanced tubule, the slurries of every advanced tubule condense after outside lower pilot tunnel gusset
Hanging stick shape holding force structure is respectively formed in rock, finally connection forms curtain shape structure to each hanging stick shape holding force structure.
Step 7, during lower pilot drive, cut off to exposing to the advanced tubule outside lower pilot tunnel preliminary bracing scope,
And the grid mesh sheet welding between lower pilot tunnel preliminary bracing Shaped Steel steelframe.
Drilling, conduit installation should be met the following requirements in the utility model：
First, installing for ductule should head into method using hole is drawn.
2nd, boring direction should be straight.
3rd, bore diameter should be greater than advanced tubule, generally no greater than 50mm, and the length that hole depth regards advanced tubule is true
It is fixed.
4th, using blowpipe method borehole cleaning.
Before slip casting, deposit in first flush pipe is answered, order is carried out from the bottom to top.Single hole grouting pressure reaches design requirement
Value, continue slip casting 10min and enter to starch speed be start into 1/4 or grout absorption of slurry speed reach design grout absorption 80% and with
Slip casting can terminate when upper.Ball valve, last detergent line are being closed in elder generation's termination of pumping during stopping.Grouting parameter should be according to grouting test knot
Fruit and field condition adjustment.
Claims (8)
1. a kind of sliceable advanced tubule, including body, it is characterised in that：The body（1）Steel pipe by three sections is suitable
Secondary to be spliced, blossom type interval is drilled with slurry outlet on the tube wall of body（1a）, three sections are followed successively by a section leading portion（1b）, extremely
Few quasi- section of a feast-brand mark（1c）With a section endpiece（1d）, the internal thread that is set by cooperating between each section（2）With it is outer
Screw thread（3）Connection end to end is carried out,
The leading portion（1b）Termination（1b1）In pointed cone type, the endpiece（1d）It is reserved with from its middle part to tail end and does not set out slurry
The only slurry section in hole（1d1）, the endpiece（1d）Tail end be welded with a circle iron hoop（4）.
2. sliceable advanced tubule according to claim 1, it is characterised in that：The only slurry section（1d1）Length not
Less than 30cm.
3. sliceable advanced tubule according to claim 1, it is characterised in that：The slurry outlet（1a）Spacing be 10
~20cm, slurry outlet（1a）Eye diameter be 6-8cm.
4. sliceable advanced tubule according to claim 1, it is characterised in that：The standard section（1c）Length be
1~2m.
5. the advance support connecting structure of the sliceable advanced tubule according to claim 1-4 any one, its feature
It is：Including upper pilot tunnel advance support（5）, upper pilot tunnel side wall preliminary bracing（6）, the upper horizontal median septum of pilot tunnel（7）, upper pilot tunnel
Lock foot anchoring stock（8）, lower pilot tunnel advanced levels supporting（9）, country rock on the outside of lower pilot tunnel（10）And advanced tubule,
The advanced tubule avoids pilot tunnel advance support（5）With lower pilot tunnel advanced levels supporting（9）, from upper branch at pilot tunnel initial stage
Pilot tunnel preliminary bracing is passed outwards through on the inside of shield and anchors into country rock on the outside of lower pilot tunnel obliquely（10）Within, until under to be onstructed
Pilot tunnel wall bottom（11）Following position.
6. the advance support connecting structure of sliceable advanced tubule according to claim 5, it is characterised in that：It is described super
Preceding ductule is in a row set along tunneling direction is longitudinally spaced, is provided with continuously out along the outside of lower pilot tunnel multiple rows of.
7. the advance support connecting structure of sliceable advanced tubule according to claim 6, it is characterised in that：It is described super
Preceding ductule obliquely anchor into angle（12）With horizontal plane into angular region be 70~80 °.
8. the advance support connecting structure of sliceable advanced tubule according to claim 7, it is characterised in that：It is described super
The tube pitch that sets of the preceding ductule along tunneling direction is not more than the tube pitch of the advanced tubule of upper pilot tunnel, and scope is
0.3~0.5m, the array pitch of the outside multiple rows of setting in outside of the advanced tubule along lower pilot tunnel is 0.2~0.3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720294385.6U CN206668268U (en) | 2017-03-24 | 2017-03-24 | A kind of sliceable advanced tubule and its advance support connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720294385.6U CN206668268U (en) | 2017-03-24 | 2017-03-24 | A kind of sliceable advanced tubule and its advance support connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206668268U true CN206668268U (en) | 2017-11-24 |
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ID=60374385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720294385.6U Expired - Fee Related CN206668268U (en) | 2017-03-24 | 2017-03-24 | A kind of sliceable advanced tubule and its advance support connecting structure |
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| CN (1) | CN206668268U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676947A (en) * | 2020-06-23 | 2020-09-18 | 中国铁路设计集团有限公司 | Tunnel inverted arch foundation reinforcing assembly and construction method |
-
2017
- 2017-03-24 CN CN201720294385.6U patent/CN206668268U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676947A (en) * | 2020-06-23 | 2020-09-18 | 中国铁路设计集团有限公司 | Tunnel inverted arch foundation reinforcing assembly and construction method |
| CN111676947B (en) * | 2020-06-23 | 2022-02-01 | 中国铁路设计集团有限公司 | Tunnel inverted arch foundation reinforcing assembly and construction method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 Termination date: 20210324 |