CN110284897A - A kind of jacking construction engineering method under major diameter cobble complex geological condition - Google Patents
A kind of jacking construction engineering method under major diameter cobble complex geological condition Download PDFInfo
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- CN110284897A CN110284897A CN201910614446.6A CN201910614446A CN110284897A CN 110284897 A CN110284897 A CN 110284897A CN 201910614446 A CN201910614446 A CN 201910614446A CN 110284897 A CN110284897 A CN 110284897A
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- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000012407 engineering method Methods 0.000 title claims abstract description 15
- 239000004927 clay Substances 0.000 claims abstract description 43
- 239000002689 soil Substances 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000010790 dilution Methods 0.000 claims abstract description 5
- 239000012895 dilution Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000002002 slurry Substances 0.000 claims description 28
- 239000004575 stone Substances 0.000 claims description 22
- 239000000956 alloy Substances 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 238000009955 starching Methods 0.000 claims description 8
- 238000005299 abrasion Methods 0.000 claims description 6
- 238000010410 dusting Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000005183 dynamical system Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- 229920002472 Starch Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 235000019698 starch Nutrition 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 102000002322 Egg Proteins Human genes 0.000 description 2
- 108010000912 Egg Proteins Proteins 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000004681 ovum Anatomy 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 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
- 230000008450 motivation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses the jacking construction engineering methods under a kind of major diameter cobble complex geological condition, successively appears including equipment installation, examination top, normal jacking, push-bench in preparation of construction, test setting-out, track laying, well, head is taken to tear pipeline open, when normal jacking failure, control push-bench is retracted, normal jacking is re-started after replacement push-bench, the following steps are included: level-one is broken, two-stage crushing, dilution mixing, mudstone separation when the normal jacking.The present invention efficiently solves the problems, such as to be obstructed in the jacking being mingled under the clay layer and sandy soils geological conditions of boulder bed or erratic boulder, not only accelerates construction speed, but also reduce operating expenses, provides for similar engineering with reference to experience.
Description
Technical field
The present invention relates to technical field of pipeline construction, the push pipe under a kind of major diameter cobble complex geological condition is particularly related to
Construction.
Background technique
Jacking construction is exactly non-excavating construction method, is a kind of piping laying construction technology do not excavated or excavated less.
Construction by pipeline jacking method is exactly the top power generated in working pit by means of jacking device, overcomes the frictional force of pipeline and surrounding soil,
Pipeline is headed into soil by the gradient of design, and the earthwork is transported.The completion of one section pipe heads into soil layer and then lower double section tube
Son continues jacking.Its principle is by means of thrusts such as main top oil cylinder and pipeline enclosure, relay wells, tool pipe or development machine from work
It is advanced to always in reception hole and slings across soil layer in hole.After pipeline follows tool pipe or development machine closely, it is embedded between two holes.
For different geological conditions, execution conditions and design requirement, the jacking construction mode adapted to therewith how is selected,
How push-bench and matched auxiliaring equipment are correctly selected, will be very crucial for jacking construction.For clay layer
And sandy soils, and to carry out jacking construction especially difficult for the geology for being mingled with boulder bed or erratic boulder layer, especially to cobble diameter it is big, contain
When the geology that amount is high, intensity is big is constructed, by being complicated difficult.Clay layer and sandy soils should be adapted to, is had again broken
Major diameter, high intensity, high-content cobble, traditional mud water balance push bench and huge cobble mud water balance push bench cannot push up
Into success.
Summary of the invention
For the deficiency in above-mentioned background technique, the present invention proposes the push pipe under a kind of major diameter cobble complex geological condition
Construction solves the technology containing a large amount of major diameters, the clay layer of high-intensitive cobble and sandy soils jacking construction difficulty and asks
Topic.
The technical scheme of the present invention is realized as follows: the jacking construction work under a kind of major diameter cobble complex geological condition
Method, successively include preparation of construction, test setting-out, track laying, equipment installation in well, examination top, normal jacking, push-bench appear,
Head is taken to tear pipeline open, control push-bench is retracted when normal jacking failure, re-starts normal jacking after replacing push-bench, described
When normal jacking the following steps are included:
Step 1: level-one is broken, and it is broken that the hobboing cutter on mud water balance push bench cutterhead carries out level-one to cobble；
Step 2: two-stage crushing, the broken cobble of level-one by the step 1 enter the soil of mud water balance push bench
Storehouse carries out two-stage crushing；
Step 3: dilution mixing, cobble and clay after the two-stage crushing of the step 2 enter the mud at clay bin rear
Sump, broken cobble and clay are diluted in muddy water storehouse is mixed to form mudstone slurries；
Step 4: the mudstone slurries that mixing is diluted in the step 3 are drained into mud-stone separator, mud-stone separator by mudstone separation
It is recycled after being separated to mudstone slurries.
Clay bin is provided in advance for starching mouth in the step 3, is connected in advance for slurry mouth with the flow inlet in muddy water storehouse, is supplied
It starches pipe and provides high viscosity mud to clay bin and muddy water storehouse, synchronized in the step 3 to the rubble in clay bin and muddy water storehouse
Mixing is diluted with clay.
Hobboing cutter in the step 1 is the double-edged hobbing cutter that Rockwell hardness is 89 ~ 93HRA, and double-edged hobbing cutter is arranged on cutterhead
There are 11, scraper is provided on cutterhead.
Clay bin in the step 2 is pre-large post-small taper storehouse, is provided with and muddy water storehouse phase on the inner wall in taper storehouse
It is logical into mud hole, the cobble and clay in clay bin described in step 3 are by entering muddy water storehouse into mud hole, into the front side in mud hole
It is disposed with the hard, wear-resistant alloy knife rib and blade that the two-stage crushing is carried out to cobble.
Water and bentonitic weight ratio are 10:1 in the high viscosity mud, and viscosity is more than or equal to 80 seconds, estimates and combine
Marsh funnel detects the viscosity of high viscosity mud, by adding water or bentonite to adjust when there is deviation.
The mud-stone separator includes the scalping being filtered mudstone slurries except stone, the mudstone slurry after being filtered to remove stone
Liquid stream enters to store stock tank, is sent the slurries stored in stock tank to cyclone using slush pump and separated, heavy after cyclone separates
Slag filters again through dusting cover and flows into the storage stock tank, flows into mud pit through the filtered mud of dusting cover, the mud tune in mud pit
With for after high viscosity mud pass through mud pumping to flow inlet be recycled.
It is described to need to meet one of following two conditions for slurry mouth unlatching in advance: (1) when normal jacking construction, to observe power
The ammeter of system, electric current meter reading is about 80A when normal jacking, is opened when it is 100A or so that current indication, which mutates, super
It is preceding for starch mouth；(2) mud of observation sludge pipe discharge is opened in advance when stone contents increase than before in mud for starching mouth.
After the completion of each normal jacking circulation section jacking, hard, wear-resistant alloy knife rib in inspection hobboing cutter, scraper and clay bin
With the abrasion condition of blade, abrasion is replaced when reaching 15mm, and when replacement, first entire cutterhead is dismantled, with crane by cutterhead
Lay flat, the bolt of fixed hobboing cutter twisted off behind cutterhead, more renew hobboing cutter, in scraper and clay bin hard, wear-resistant alloy knife rib and
Blade need to weld again.
Before the push-bench is retracted, new push-bench and related corollary equipment are ready to, push-bench exit after by new push pipe
Machine installs fast jacking to former block position.
The present invention efficiently solve the jacking being mingled under the clay layer and sandy soils geological conditions of boulder bed or erratic boulder by
Resistance problem.Construction quality can satisfy design and code requirement, can be avoided generation safety accident, both accelerates construction speed,
Operating expenses is reduced again, is provided for similar engineering with reference to experience.Social benefit of the present invention is huge.The present invention greatly shortens
Construction period compared with other jacking methods not only increases safety coefficient, provides for jacking construction industry similar multiple
The technical support and case of push pipe in miscellaneous geology.In addition, the high viscosity mud in the present invention can be recycled, do not generate discarded
Object, construction method energy conservation and environmental protection, suitable for layer of sand, sandy soils, the soil layer containing cobble or erratic boulder, be particularly suitable for cobble, clay,
The jacking construction of the bad ground (cobble diameter can be 5 ~ 40cm) of sand mixing.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment makees letter
Singly introduce, it should be apparent that, drawings in the following description are only some embodiments of the invention, skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is construction method flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1, the jacking construction engineering method under a kind of major diameter cobble complex geological condition, as shown in Figure 1, successively including
Preparation of construction, test setting-out, track laying, equipment installation in well, examination top, normal jacking, push-bench is appeared, slip casting is replaced, is taken
Head tears pipeline open, and when normal jacking failure, control push-bench is retracted, and re-starts normal jacking after replacing push-bench.Measurement is put
Construction monitoring, correction processing are carried out after sample, are corrected to taking head to tear pipeline open.It is pushed up based on the cyclic process of the normal jacking
Retraction removes pipe gut line, then carries out tube coupling installation and installs pipeline in tube coupling, recycles jacking with this.
When the normal jacking the following steps are included:
Step 1: level-one is broken, and the hobboing cutter on mud water balance push bench cutterhead carries out level-one to cobble and is crushed, and the hobboing cutter is Lip river
Family name's hardness is the double-edged hobbing cutter of 89 ~ 93HRA, and double-edged hobbing cutter is provided with 11 on cutterhead, scraper is provided on cutterhead.It is very heavy
Pushing tow motivation head advances, and squeezes the front soil body and cobble, cutterhead rotation, and hobboing cutter passively rotates, makes to generate between hobboing cutter and cobble
Powerful extruding, rubbing action, are broken into gravel pebbles for cobble stone, boulder.
Step 2: two-stage crushing, the broken cobble of level-one by the step 1 enter mud water balance push bench
Clay bin carries out two-stage crushing.The clay bin is pre-large post-small taper storehouse, is provided with and muddy water storehouse on the inner wall in taper storehouse
Communicate into mud hole, into mud hole on front side of be disposed with the hard, wear-resistant alloy knife rib and knife that the two-stage crushing is carried out to cobble
Piece.The cobble being crushed through step 1 hobboing cutter enters clay bin, clay bin blade rotation, in storehouse with the soil cut by scraper
Wear-resistance alloy knife rib collective effect on wall generates shearing-crushing, i.e. two-stage crushing, the ovum being broken to the cobble entered in storehouse
Stone and soil are through entering muddy water storehouse into mud hole on bulkhead.
Step 3: dilution mixing, cobble and soil after the two-stage crushing of the step 2 enter clay bin rear
Muddy water storehouse, broken cobble and clay be diluted in muddy water storehouse and be mixed to form mudstone slurries, and mudstone slurries are in muddy water storehouse
It is discharged after being inside sufficiently mixed by discharge pipe.
Step 4: mudstone separation, the mud excluded out of discharge pipe are mingled with rubble, sand, in order to make mud circulation benefit
With reducing cost, improved to original technique, increase mudstone separation equipment, remove sand particles therein, ensure that mud
Starch purity.After use, mud veclamation rate is up to 80% or more.
The mudstone slurries that mixing is diluted in the step 3 are drained into mud-stone separator, mud-stone separator pair by discharge pipe
Mudstone slurries are recycled after being separated.The mud-stone separator includes the scalping being filtered mudstone slurries except stone, mistake
Mudstone slurries after filtering out stone, which flow into, stores stock tank, is sent the slurries stored in stock tank to cyclone using slush pump and is divided
From the sediment after cyclone separates filters again through dusting cover flows into the storage stock tank, flows into mud through the filtered mud of dusting cover
Stock tank, the mud in mud pit are recycled after being allocated as high viscosity mud by mud pumping to flow inlet.
Water and bentonitic weight ratio are 10:1 in the high viscosity mud, and viscosity is more than or equal to 80 seconds, estimates and combine
Marsh funnel detects the viscosity of high viscosity mud, by adding water or bentonite to adjust when there is deviation.
Clay bin is provided in advance for starching mouth in the step 3, is connected in advance for slurry mouth with the flow inlet in muddy water storehouse, is supplied
It starches pipe and provides high viscosity mud to clay bin and muddy water storehouse, synchronized in the step 3 to the rubble in clay bin and muddy water storehouse
Mixing is diluted with clay.It is described to need to meet one of following two conditions for slurry mouth unlatching in advance:
(1) when normal jacking construction, the ammeter of dynamical system is observed, electric current meter reading is about 80A when normal jacking, works as electric current
Reading mutates to open when 100A or so in advance for starching mouth；
(2) mud of observation sludge pipe discharge is opened in advance when stone contents increase than before in mud for starching mouth.
After opening in advance for slurry mouth, flow inlet can carry out clay bin to dilute clay, rubble mixture for slurry, increase it
Mobility can pass through into mud hole in time and enter muddy water storehouse, avoid described in step 2 into mud hole plug.
Embodiment 2, the jacking construction engineering method under a kind of major diameter cobble complex geological condition, the cutter head of push-bench are crushed ovum
Stone can cause very big abrasion to cutter head itself, will substantially reduce the fragmentation to cobble.Each normal jacking circulation section top
Into, require to check after the completion hobboing cutter, in scraper and clay bin hard, wear-resistant alloy knife rib and blade abrasion condition, abrasion reaches
It is replaced when to 15mm, when replacement, first entire cutterhead is dismantled, cutterhead is laid flat with crane, fixation is twisted off behind cutterhead
The bolt of hobboing cutter more renews hobboing cutter, and hard, wear-resistant alloy knife rib and blade need to weld again in scraper and clay bin.
Other steps of the present embodiment are same as Example 1.
Embodiment 3, the jacking construction engineering method under a kind of major diameter cobble complex geological condition, since nothing is reported in geologic prospect
Method reflects soil structure along push pipe completely, when encountering surveying the boulder bed or erratic boulder that do not have display in report, using tradition
Mud water balance push bench can not broken stone also result in jacking failure, need to by former push-bench compulsory withdrawal, replace construction equipment
And method.
The pipelines such as all power supplies, mud tube are first removed when exiting, and jack is bounced back.Crane slings jack, exchanges top
Into direction, using the caisson wall at jacking hole as backrest, need setting steel plate by behind, reinstalling the very heavy of jacking when necessary
Top.In the H profile steel of jack front end installation 250mm × 250mm, push-bench is connected with H profile steel with reinforcing bar, firm welding.Thousand
Jin top pushing tow H profile steel, pulls push-bench and pipeline, hangs out pipeline section by section, completes to retract.Often exit a length of tubing, require by
It connects reinforcing bar and exceeds partial cut, bounce back jack, welds again, and welding is necessary securely, reliable, meets welding conditions requirement.
Before the push-bench is retracted, new push-bench and related corollary equipment are ready to, push-bench exit after by new push pipe
Machine installs fast jacking to former block position, avoids the duct formed after exiting from placing for a long time, shrinkage cavity or collapse hole occurs.
Other steps of the present embodiment are identical as embodiment 1 or 2.
The not detailed place of the present invention is conventional technical means known in those skilled in the art.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. the jacking construction engineering method under a kind of major diameter cobble complex geological condition successively includes preparation of construction, test setting-out, rail
Road is laid with, equipment installation, examination top, normal jacking, push-bench appear, head taken to tear pipeline open in well, when normal jacking failure time control
Push-bench processed is retracted, and re-starts normal jacking after replacing push-bench, it is characterised in that: include following step when the normal jacking
It is rapid:
Step 1: level-one is broken, and it is broken that the hobboing cutter on mud water balance push bench cutterhead carries out level-one to cobble；
Step 2: two-stage crushing, the broken cobble of level-one by the step 1 enter the soil of mud water balance push bench
Storehouse carries out two-stage crushing；
Step 3: dilution mixing, cobble and clay after the two-stage crushing of the step 2 enter the mud at clay bin rear
Sump, broken cobble and clay are diluted in muddy water storehouse is mixed to form mudstone slurries；
Step 4: the mudstone slurries that mixing is diluted in the step 3 are drained into mud-stone separator, mud-stone separator by mudstone separation
It is recycled after being separated to mudstone slurries.
2. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 1, it is characterised in that: institute
It states clay bin in step 3 to be provided in advance for starching mouth, be connected in advance for slurry mouth with the flow inlet in muddy water storehouse, flow inlet is to soil
Storehouse and muddy water storehouse provide high viscosity mud, synchronized in the step 3 in clay bin and muddy water storehouse rubble and clay carry out
Dilution mixing.
3. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 2, it is characterised in that: institute
Stating the hobboing cutter in step 1 is the double-edged hobbing cutter that Rockwell hardness is 89 ~ 93HRA, and double-edged hobbing cutter is provided with 11 on cutterhead,
Scraper is provided on cutterhead.
4. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 3, it is characterised in that: institute
Stating clay bin in step 2 is pre-large post-small taper storehouse, be provided on the inner wall in taper storehouse communicated with muddy water storehouse into mud
Hole, the cobble and clay in clay bin described in step 3 by entering muddy water storehouse into mud hole, into mud hole on front side of be disposed with pair
Cobble carries out the hard, wear-resistant alloy knife rib and blade of the two-stage crushing.
5. special according to the jacking construction engineering method under the described in any item major diameter cobble complex geological conditions of claim 2-4
Sign is: water and bentonitic weight ratio are 10:1 in the high viscosity mud, and viscosity is more than or equal to 80 seconds, estimate and combine horse
Family name's funnel detects the viscosity of high viscosity mud, by adding water or bentonite to adjust when there is deviation.
6. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 5, it is characterised in that: institute
Stating mud-stone separator includes the scalping being filtered mudstone slurries except stone, and the mudstone slurries after being filtered to remove stone, which flow into, stores slurry
The slurries stored in stock tank are sent to cyclone and are separated using slush pump by pond, the sediment after cyclone separates through dusting cover again
Secondary filtering flows into the storage stock tank, flows into mud pit through the filtered mud of dusting cover, the mud in mud pit is allocated as high viscosity
It is recycled after mud by mud pumping to flow inlet.
7. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 6, it is characterised in that institute
It states and needs to meet one of following two conditions for slurry mouth unlatching in advance:
(1) when normal jacking construction, the ammeter of dynamical system is observed, electric current meter reading is about 80A when normal jacking, works as electric current
Reading mutates to open when 100A or so in advance for starching mouth；
(2) mud of observation sludge pipe discharge is opened in advance when stone contents increase than before in mud for starching mouth.
8. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 7, it is characterised in that: every
After the completion of a normal jacking circulation section jacking, the mill of hard, wear-resistant alloy knife rib and blade in inspection hobboing cutter, scraper and clay bin
Situation is damaged, and abrasion is replaced when reaching 15mm, when replacement, first entire cutterhead is dismantled, cutterhead is laid flat with crane, from cutterhead
The bolt for twisting off fixed hobboing cutter below more renews hobboing cutter, and hard, wear-resistant alloy knife rib and blade need again in scraper and clay bin
Welding.
9. the jacking construction engineering method under major diameter cobble complex geological condition according to claim 8, it is characterised in that: institute
It states before push-bench retracts, new push-bench and related corollary equipment is ready to, push-bench installs new push-bench fastly after exiting
Fast jacking is to former block position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910614446.6A CN110284897B (en) | 2019-07-09 | 2019-07-09 | Pipe jacking construction method under complex geological condition of large-diameter pebbles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614446.6A CN110284897B (en) | 2019-07-09 | 2019-07-09 | Pipe jacking construction method under complex geological condition of large-diameter pebbles |
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| CN110284897A true CN110284897A (en) | 2019-09-27 |
| CN110284897B CN110284897B (en) | 2021-08-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503368A (en) * | 2020-04-10 | 2020-08-07 | 中铁十二局集团建筑安装工程有限公司 | Pipe jacking construction method under sandy gravel geological condition |
| CN112833249A (en) * | 2021-02-24 | 2021-05-25 | 中建七局安装工程有限公司 | Construction method for horizontal directional drilling of prefabricated heat-insulation pipeline through water source protection area |
| CN114607834A (en) * | 2022-03-31 | 2022-06-10 | 中交水利水电建设有限公司 | Pipeline vertical jacking construction method |
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| CN112833249B (en) * | 2021-02-24 | 2022-08-19 | 中建七局安装工程有限公司 | Construction method for horizontal directional drilling of prefabricated heat-insulation pipeline to cross water source protection area |
| CN114607834A (en) * | 2022-03-31 | 2022-06-10 | 中交水利水电建设有限公司 | Pipeline vertical jacking construction method |
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