CN106013078B - A kind of construction method of highly permeable stratum consolidation curtain structure - Google Patents
A kind of construction method of highly permeable stratum consolidation curtain structure Download PDFInfo
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- CN106013078B CN106013078B CN201610540372.2A CN201610540372A CN106013078B CN 106013078 B CN106013078 B CN 106013078B CN 201610540372 A CN201610540372 A CN 201610540372A CN 106013078 B CN106013078 B CN 106013078B
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- valve tube
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention belongs to a kind of construction methods of highly permeable stratum consolidation curtain structure, include the following steps.Ground-connecting-wall is prepared, is excavated downwards along setting-out line road with excavator, ground-connecting-wall ditch is formed, casting concrete wall forms the ground-connecting-wall flushed with ground in ground-connecting-wall ditch, and the thickness of ground-connecting-wall is 500~600mm, and depth is 22~25m；Installation mini-valve tube is inserted into mini-valve tube in hole immediately after sleeve shell material replacement completion, and the length for often saving mini-valve tube is 4m；First slip casting section slip casting prepares grout material by design requirement, carries out slip casting after sleeve shell material reaches scheduled intensity.The present invention has method and structure novel simple, and working procedure is few, and range of grouting is controllable, and work efficiency is high, and construction cost is low, safe, and speed of application is fast, the advantage that grouting consolidation effect is good and energy conservation and environmental protection is good.
Description
Technical field
The present invention relates to a kind of construction methods of highly permeable stratum consolidation curtain structure.
Background technology
Currently, as stratum consolidation handles the increasingly mature of construction technology, with outstanding safety, high efficiency and can
By the geology improved effect of property, it has been widely used in city underground, municipal road constructing tunnel.In particular, being to pass through
Rivers subaqueous tunnel construction in, shield machine export ＆ import end reinforce in, stratum consolidation handle construction technology be even more it is wide
General application.
In shield machine export ＆ import, geology reinforcing body effect, the good situations of sealing performance state of construction ground end are
Determine the key link of shield machine export ＆ import and tunnel safety.In the case that therefore, in construction ground end, reinforcing body fails,
Or in highly permeable stratum, especially in subaqueous tunnel construction, how safely and reliably to make shield machine export ＆ import, how to ensure
The construction quality of end reinforcing body makes the consolidation effect of construction ground end and sealing performance reach best, is one and needs depth
It solves the problems, such as.This is not exclusively to the safety to shield machine, and ensures molded tunnel safety, surrounding enviroment and constructor
The needs of member's personal safety.
Have in the prior art to stratum reinforcement measure：The side such as sleeve valve barrel grouting, high-pressure rotary jet grouting pile slip casting, cement mixing pile
Method.High pressure jet grouting and cement mixing pile driving construction are limited by place and geology, poor to sand-pebble layer adaptability.
Sleeve valve barrel grouting can realize delamination pour slurry, and grouting pressure can in real time be adjusted according to monitoring data.But mini-valve tube is noted
Slurry is also poor in rich water circle gravel pebble layer adaptability.
In short, slip casting can be caused in highly permeable stratum, rich water and highly permeable grittiness justify gravel pebble layer with the prior art
Grouting amount is excessive in construction（Number of dropouts）, situations such as slip casting range of scatter is uncontrollable and cementing effect is bad, seriously affect slip casting
Consolidation effect.
Invention content
The object of the present invention is to provide a kind of construction methods of highly permeable stratum consolidation curtain structure, have method and structure
Novel simple, working procedure is few, and range of grouting is controllable, and work efficiency is high, and construction cost is low, safe, and speed of application is fast, note
The slurry advantage that consolidation effect is good and energy conservation and environmental protection is good.
For this purpose, the construction method of the present invention includes the following steps：
（1）The range for delimiting the construction ground on highly permeable stratum to be reinforced, is used in combination white line to mark setting-out line road.
（2）Prepare ground-connecting-wall.It is excavated downwards along setting-out line road with excavator, forms ground-connecting-wall ditch.In ground-connecting-wall
Casting concrete wall forms the ground-connecting-wall flushed with ground in ditch.The thickness of ground-connecting-wall is 500~600mm, and depth is 22~25m.
（3）The measurement and positioning in construction ground.Using live datum mark with total powerstation by design requirement spacing carry out cloth hole and
Determine that drilling depth, tissue related personnel's device to hole position are measured and checked, confirm errorless.First from close to ground-connecting-wall periphery cloth
Hole, the two row cloth holes close to ground-connecting-wall periphery are the blossom type of 0.5m × 0.5m spacing, and the cloth hole of remaining construction ground is 1m × 1m
The blossom type of spacing.
（4）Drilling machine is in place and drills.It is required that drilling machine is placed steady, secured and keeps horizontal, drilling machine must be vertical, and controls
After confirmation is errorless, drilling construction, drilling diameter 100 are carried out according to cloth hole according to the hole position measured by leading truck verticality ＜ 0.5%
~150 millimeters.
（5）Inject sleeve shell material.After pore-forming, sleeve shell material is replaced by mud in hole by drilling rod immediately.Method is will be by following
The pipe of ring mud is connected on squash type slip casting machine, and under the action of grouting pressure, mud in hole is replaced as sheath body by drilling rod
Material.Sleeve shell material enters foot of hole under pressure, by drilling rod, and with the entrance of sleeve shell material, mud is from ground hole in hole
Mouth cements out, and when finding in the mud of discharge containing sleeve shell material, stops displacement.
（6）Mini-valve tube is installed.After sleeve shell material replacement completion, mini-valve tube is inserted into hole immediately, often saves the length of mini-valve tube
Degree is 4m.The PVC casing connections that two adjacent sections mini-valve tube is 20cm with length when being inserted into.It will be tucked inside the sleeve valve using U-PVC adhesives
Pipe and casing cement, and first segment mini-valve tube installs plug.Again to injected clear water in pipe, to prevent the curvature of mini-valve tube, under
The mini-valve tube in portion should ensure that the center of mini-valve tube and drill center overlap, and mini-valve tube bassets 20cm, then is entangled firm with pullover, prevents
Only sundries enters in pipe.
（8）First slip casting section slip casting.After sleeve shell material reaches scheduled intensity, grout material is prepared by design requirement, is carried out
Slip casting.Grouting mode takes retrusive segmenting slip casting technique, i.e., carries out slip casting from bottom to top by bottom hole in slip casting band, notes every time
Slurry segment length 0.30m~0.40m above carries grouting pressure pipe after having noted the first slip casting section.Carry out the slip casting of the second slip casting section.Slip casting
When in the process if you need to suspend slip casting, it is necessary to first take out cement mortar pipe and be put into scuttlebutt, and simultaneously promote grouting pressure pipe
0.4m stops slip casting after noting clear water into hole, had not only kept pipeline unimpeded so again, but also ensures that slip casting is not influenced by water filling.Slip casting
Slip casting work sheet, the slip casting working condition of injected hole and grouting with plunger activity duration are performed in the process, during slip casting,
Grout injection control, final grouting pressure 1.5MPa are carried out by grouting pressure standard.When grouting pressure reaches design final pressure, the duration is many
In 10 minutes, you can terminate slip casting, cleaned to mini-valve tube with clear water at the end of sleeve valve barrel grouting, in case secondary grouting.
（9）Second slip casting section slip casting.If after the first slip casting section slip casting, meets design requirement after testing, then stop constructing.It is no
Then, it repeats the first slip casting section slip casting and carries out the second slip casting section slip casting until meeting design requirement.
Said structure design realizes the purpose of the present invention.
The present invention has method and structure novel simple, and working procedure is few, and range of grouting is controllable, and work efficiency is high, construction
At low cost, safe, speed of application is fast, the advantage that grouting consolidation effect is good and energy conservation and environmental protection is good.
The present invention is equipped with ground-connecting-wall water-stop curtain in reinforcing body range outer periphery, by mini-valve tube group to sandy gravel highly permeable
Stratum carries out grouting and reinforcing.So that ground-connecting-wall is completed impermeable role, grouting and reinforcing is carried out using mini-valve tube group within the scope of reinforcing body
Stratum.This used leading sealing of ground-connecting-wall Grouting Consolidation method again, have mortar depositing construction is efficient, construction quality is high,
The advantages that material is not lost in and is environmentally protective.
The present invention compared with prior art caused by advantageous effect：
（1）The present invention carries out 28 days intensity detections by detection hole to reinforcing body, is revolved in traditional sleeve valve barrel grouting, high pressure
In the strengthening stratum that the methods of spray stake slip casting, cement mixing pile cannot construct, when being unsatisfactory for design strength and sealing requirement, this hair
It is bright it is equal can be reinforced, and reach design requirement.
（2）Internal slip casting is carried out using ground-connecting-wall water-stop curtain, with mortar depositing construction is efficient, quality is high, material does not flow
The advantages that mistake, construction cost is low and environmentally protective.
Specific implementation mode
A kind of construction method of highly permeable stratum consolidation curtain structure, includes the following steps：
Include the following steps：
（1）Delimit the range of the construction ground on highly permeable stratum to be reinforced.It is used in combination white line to mark setting-out line road.
（2）Prepare ground-connecting-wall.It is excavated downwards along setting-out line road with excavator, forms ground-connecting-wall ditch.In ground-connecting-wall
Casting concrete wall forms the ground-connecting-wall flushed with ground in ditch.The concrete absolute altitude of the concrete walls is C20.
The thickness of ground-connecting-wall is 500~600mm, and depth is that 22~25m or depth can be depending on design requirements.The ground
Even the depth of wall is greater than or equal to depth of pore forming.
The construction ground is in the range of ground-connecting-wall or ground-connecting-wall surrounds the range of construction ground.
（3）The measurement and positioning in construction ground.Using live datum mark with total powerstation by design requirement spacing carry out cloth hole and
Determine drilling depth.Tissue related personnel's device to hole position measures and checks, and confirms errorless.First from close to ground-connecting-wall periphery cloth
Hole, the two row cloth holes close to ground-connecting-wall periphery are the blossom type of 0.5m × 0.5m spacing, and the cloth hole of remaining construction ground is 1m × 1m
The blossom type of spacing；Or the two row cloth holes on the close ground-connecting-wall periphery are pitch-row 1.5m, array pitch 1.5m, cloth triangular in shape
It sets.The cloth hole of remaining construction ground is pitch-row 1m, and array pitch 1m is triangularly arranged.
（4）Drilling machine is in place and drills.It is required that drilling machine is placed steady, secured and keeps horizontal, drilling machine must be vertical, and controls
Leading truck verticality ＜ 0.5%.According to the hole position measured, after confirmation is errorless, drilling construction, drilling diameter 100 are carried out according to cloth hole
~150 millimeters or depending on sets requirement.
（5）Inject sleeve shell material.Sleeve shell material is replaced by mud in hole by drilling rod immediately after pore-forming.Method is will to pass through cycle
The pipe of mud is connected on squash type slip casting machine, and under the action of grouting pressure, mud in hole is replaced as sleeve shell material by drilling rod.
Sleeve shell material enters foot of hole under pressure, by drilling rod, and with the entrance of sleeve shell material, mud is set from ground aperture in hole
It swaps out and, when finding in the mud of discharge containing sleeve shell material, stop displacement.
The raw material weight proportioning of soup processed of the sleeve shell material is cement:Swelled ground：Water=1:1.5:2.
（6）Mini-valve tube is installed.After sleeve shell material replacement completion, mini-valve tube is inserted into hole immediately.Often save the length of mini-valve tube
Degree is 4m.When being inserted into, the PVC casing connections that two adjacent sections mini-valve tube is 20cm with length will be tucked inside the sleeve valve using U-PVC adhesives
Pipe and casing cement, and first segment mini-valve tube installs plug (forming ball-valve structure).Again to injected clear water in pipe, to prevent sleeve valve
The curvature of pipe.The mini-valve tube of lower part should ensure that the center of mini-valve tube and drill center overlap.Mini-valve tube bassets 20cm, then
It is entangled firm with pullover, prevents sundries from entering in pipe.
（8）First slip casting section slip casting.After sleeve shell material reaches scheduled intensity, grout material is prepared by design requirement, is carried out
Slip casting (for traditional grouting mode, i.e., tripping in slurry casting machine in mini-valve tube, the centre about 20cm long grooved bores of slurry casting machine, on it under
Stop grouting plug is respectively carried, the slurry casting machine in grouting pressure pipe and mini-valve tube is attached).Grouting mode takes retrusive segmentation note
Sizing process.I.e.：Slip casting is carried out by bottom hole from bottom to top in slip casting band.Each slip casting segment length 0.30m~0.40m, has noted first
After slip casting section.Grouting pressure pipe is above carried, the slip casting of the second slip casting section is carried out.
When during slip casting if you need to suspend slip casting, it is necessary to first take out cement mortar pipe and be put into scuttlebutt, and simultaneously will note
It starches pressure pipe and promotes 0.4m.Stop slip casting again after noting clear water into hole, not only kept pipeline unimpeded in this way, but also ensures that slip casting is not noted
Water influences.Slip casting work sheet, the slip casting working condition of injected hole and grouting with plunger activity duration are performed during slip casting,
During slip casting, grout injection control, final grouting pressure 1.5MPa are carried out by grouting pressure standard.When grouting pressure reaches design final pressure,
Duration is no less than 10 minutes, you can and terminate slip casting, mini-valve tube is cleaned with clear water at the end of sleeve valve barrel grouting, it is standby
Secondary grouting.
The mini-valve tube uses the PVC material of Φ 48mm.The grout material is that cement uses 42.5 grades of common silicic acid
Salt cement, the water of cement grout:Cement ratio is 1:1, grout spreading range 0.75m, 0.5~1.5MPa of grouting pressure, final pressure
For 1.5MPa, flow rate of grouting 30-40L/min.
（9）If second slip casting section slip casting meets design requirement, then stops constructing after testing after the first slip casting section slip casting；It is no
It then repeats the first slip casting section slip casting and carries out the second slip casting section slip casting until meeting design requirement.
In no injected hole for implementing slip casting, should take：The mini-valve tube upper end is sealed using quick-hardening cement, is prevented
Grout phenomenon is only generated during slip casting.
The present invention's also can be used traditional sleeve valve barrel grouting, therefore be not repeated.
In short, the present invention has method and structure novel simple, working procedure is few, and range of grouting is controllable, and work efficiency is high,
Construction cost is low, safe, and speed of application is fast, the advantage that grouting consolidation effect is good and energy conservation and environmental protection is good.It can promote the use of.
Claims (10)
1. a kind of construction method of highly permeable stratum consolidation curtain structure, characterized in that include the following steps：
（1）The range for delimiting the construction ground on highly permeable stratum to be reinforced, is used in combination white line to mark setting-out line road；
（2）Ground-connecting-wall is prepared, is excavated downwards along setting-out line road with excavator, ground-connecting-wall ditch is formed, in ground-connecting-wall ditch
Casting concrete wall forms the ground-connecting-wall flushed with ground, and the thickness of ground-connecting-wall is 500~600mm, and depth is 22~25m；
（3）The measurement and positioning in construction ground carries out cloth hole and determination with total powerstation using live datum mark by design requirement spacing
Drilling depth, tissue related personnel's device to hole position measure and check, and confirmation is errorless, first from close to ground-connecting-wall periphery cloth hole, lean on
The two row cloth holes on nearly ground-connecting-wall periphery are the blossom type of 0.5m × 0.5m spacing, and the cloth hole of remaining construction ground is 1m × 1m spacing
Blossom type；
（4）Drilling machine is in place and drills, it is desirable that drilling machine is placed steady, secured and keeps horizontal, and drilling machine must be vertical, and controls guiding
Frame verticality ＜ 0.5%, according to measure hole position, confirm it is errorless after, according to cloth hole carry out drilling construction, drilling diameter 100~
150 millimeters；
（5）Sleeve shell material is injected, sleeve shell material is replaced by mud in hole by drilling rod immediately after pore-forming, method is will to pass through circulating mud
Pipe be connected on squash type slip casting machine, under the action of grouting pressure, mud in hole is replaced as by sleeve shell material, sheath body by drilling rod
Material under pressure, enters foot of hole, with the entrance of sleeve shell material, mud is displaced from ground aperture in hole by drilling rod
Come, when finding in the mud of discharge containing sleeve shell material, stops displacement；
（6）Installation mini-valve tube is inserted into mini-valve tube in hole immediately after sleeve shell material replacement completion, and the length for often saving mini-valve tube is
4m, the PVC casing connections that two adjacent sections mini-valve tube is 20cm with length when being inserted into, using U-PVC adhesives by mini-valve tube and
Casing cements, and first segment mini-valve tube installs plug, then to injected clear water in pipe, to prevent the curvature of mini-valve tube, lower part
Mini-valve tube should ensure that the center of mini-valve tube and drill center overlap, and mini-valve tube bassets 20cm, then is entangled firm with pullover, prevents miscellaneous
Object enters in pipe；
（8）First slip casting section slip casting prepares grout material by design requirement, carries out slip casting after sleeve shell material reaches scheduled intensity,
Grouting mode takes retrusive segmenting slip casting technique, i.e., carries out slip casting, each slip casting section from bottom to top by bottom hole in slip casting band
Long 0.30m~0.40m after having noted the first slip casting section, above carries grouting pressure pipe, carries out the slip casting of the second slip casting section, slip casting process
In if you need to suspend slip casting when, it is necessary to first cement mortar pipe is taken out and is put into scuttlebutt, and simultaneously by grouting pressure pipe promoted 0.4m,
Stop slip casting again after noting clear water into hole, not only kept pipeline unimpeded in this way, but also ensure that slip casting is not influenced by water filling, during slip casting
Slip casting work sheet, the slip casting working condition of injected hole and grouting with plunger activity duration are performed, during slip casting, by slip casting
Pressure criteria carries out grout injection control, and final grouting pressure 1.5MPa, when grouting pressure reaches design final pressure, the duration is no less than 10 points
Clock, you can terminate slip casting, mini-valve tube is cleaned with clear water at the end of sleeve valve barrel grouting, in case secondary grouting；
（9）If second slip casting section slip casting meets design requirement, then stops constructing after testing after the first slip casting section slip casting；Otherwise it weighs
Multiple first slip casting section slip casting carries out the second slip casting section slip casting until meeting design requirement.
2. according to the method described in claim 1, it is characterized in that：The construction ground be ground-connecting-wall in the range of or ground-connecting-wall
Surround the range of construction ground.
3. according to the method described in claim 1, it is characterized in that：The raw material weight proportioning of soup processed of the sleeve shell material is cement:Expansion
Soil：Water=1:1.5:2.
4. according to the method described in claim 1, it is characterized in that：The two row cloth holes on the close ground-connecting-wall periphery are pitch-row
1.5m, array pitch 1.5m, is triangularly arranged.
5. according to the method described in claim 1, it is characterized in that：The cloth hole of remaining construction ground be pitch-row 1m, array pitch 1m,
It is triangularly arranged.
6. according to the method described in claim 1, it is characterized in that：The depth of the ground-connecting-wall is greater than or equal to depth of pore forming.
7. according to the method described in claim 1, it is characterized in that：The mini-valve tube upper end is sealed using quick-hardening cement,
It prevents from generating grout phenomenon during slip casting.
8. according to the method described in claim 1, it is characterized in that：The mini-valve tube uses the PVC material of Φ 48mm.
9. according to the method described in claim 1, it is characterized in that：The grout material is that cement uses 42.5 grades of normal silicates
Cement, the water of cement grout:Cement ratio is 1:1, grout spreading range 0.75m, 0.5~1.5MPa of grouting pressure, final pressure are
1.5MPa, flow rate of grouting 30-40L/min.
10. according to the method described in claim 1, it is characterized in that：The concrete absolute altitude of the concrete walls is C20.
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| CN201610540372.2A CN106013078B (en) | 2016-07-11 | 2016-07-11 | A kind of construction method of highly permeable stratum consolidation curtain structure |
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| CN201610540372.2A CN106013078B (en) | 2016-07-11 | 2016-07-11 | A kind of construction method of highly permeable stratum consolidation curtain structure |
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| CN106013078B true CN106013078B (en) | 2018-07-24 |
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Families Citing this family (5)
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| CN106640120B8 (en) * | 2016-10-31 | 2022-01-07 | 北京瑞威世纪铁道工程有限公司 | Layered grouting construction method for fixed-point deep holes on earth surface |
| CN111396086A (en) * | 2020-03-25 | 2020-07-10 | 中铁二十三局集团第四工程有限公司 | Sleeve method curtain grouting construction method |
| CN113136866A (en) * | 2021-03-24 | 2021-07-20 | 中国建筑第八工程局有限公司 | Grouting reinforcement construction method for sleeve valve pipe of soil loose water-rich stratum |
| CN113738383A (en) * | 2021-10-18 | 2021-12-03 | 中铁隆工程集团有限公司 | Shield end reinforcing method |
| CN114320371A (en) * | 2022-01-05 | 2022-04-12 | 中铁二局第一工程有限公司 | Construction method for controlling deformation of operation track by isolated grouting |
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| JP3773386B2 (en) * | 2000-02-22 | 2006-05-10 | 株式会社テノックス | Construction method of underground continuous wall in boulder intervening ground |
| CN101343869A (en) * | 2008-08-19 | 2009-01-14 | 上海建工股份有限公司 | Underground continuous wall construction method of city-across pipeline |
| CN101914917B (en) * | 2010-08-10 | 2012-01-11 | 中铁一局集团有限公司 | Anti-seepage and leak-blocking construction method for excavation of subway foundation pit in soft soil area |
| CN104878741B (en) * | 2015-05-12 | 2017-01-18 | 安徽省建筑科学研究设计院 | Post-grouting waterproof structure for wall joint of underground diaphragm wall and waterproof method thereof |
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Effective date of registration: 20181203 Address after: 100037 8, 9 and 10 floors of Block B, Zhongjianyi Building, 52 West Fourth Ring South Road, Fengtai District, Beijing Co-patentee after: CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION LIMITED Patentee after: CHINA CONSTRUCTION MUNICIPAL ENGINEERING CORPORATION LIMITED Co-patentee after: China State Construction Corp. Address before: 100037 8, 9 and 10 floors of Block B, Zhongjianyi Building, 52 West Fourth Ring South Road, Fengtai District, Beijing Co-patentee before: CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION LIMITED Patentee before: CHINA CONSTRUCTION MUNICIPAL ENGINEERING CORPORATION LIMITED |