CN110528523A - A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method - Google Patents
A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method Download PDFInfo
- Publication number
- CN110528523A CN110528523A CN201910822516.7A CN201910822516A CN110528523A CN 110528523 A CN110528523 A CN 110528523A CN 201910822516 A CN201910822516 A CN 201910822516A CN 110528523 A CN110528523 A CN 110528523A
- Authority
- CN
- China
- Prior art keywords
- horizontal
- foundation pit
- grouting
- back cover
- highly permeable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of highly permeable stratum foundation pit horizontal grouting back cover construction methods, include the steps that following: the construction of horizontal grouting back cover: being accurately positioned using horizontal directional drilling machine and creep into horizontal grouting hole, after the completion of drilling, retrusive slip casting is carried out when drilling rod is returned and dragged, forms Horizontal seals in bottom of foundation ditch；Vertical curtain construction: closed vertical curtain is formed after the completion of horizontal grouting back cover, then in foundation pit surrounding or three weeks, and is completely overlapped with Horizontal seals, that is, forms highly permeable stratum foundation pit water-stop structure.The present invention carries out vertical curtain construction after first carrying out Horizontal seals construction again; Horizontal seals quickly can be carried out to foundation pit first; control underground water; then it uses vertical curtain and links together with Horizontal seals structure; so that base pit engineering forms the structure of three-dimensional antiseepage; play the role of supporting and water proof and reinforce base pit engineering, also saves project cost while preferably protection surrounding enviroment, reduce engineering risk.
Description
Technical field
The invention belongs to highly permeable stratum foundation pit construction fields in construction, and in particular, to a kind of highly permeable
Stratum building foundation pit Horizontal seals intercept water and water stop construction method.
Background technique
On highly permeable stratum during Foundation Pit Construction, the influence of underground water can not only be such that execution conditions deteriorate, and
It will cause the geological disasters such as slope collapse and the periphery subsidence of foundations.So must be strictly controlled the transition of underground water in base pit engineering
It extracts, and obtains the dry construction of foundation engineering by water-stop curtain, guarantee the stability and base of pattern foundation pit supporting structure and bottom plate
Cheat the safety of surrounding enviroment.The Groundwater Control method of base pit engineering we generally use the outer precipitation in hole, curtain vertical partition wall, base
Bottom three kinds of methods of full slip casting back cover, effect is sealing, antiseepage or draining.Highly permeable stratum foundation pit is since infiltration discharge capacity is big, ground
The basic engineering construction period is long, so that the draining, precipitation expense in conventional method are high, and waterproof of man is due to relatively waterproof
Layer buries root of Dahurian angelica depth, and vertical curtain project amount is huge, and influences quite greatly caused by hydrogeological environment around.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind highly permeable stratum building foundation pit horizontal grouting back cover intercepts water and water stop construction method.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method, includes the steps that following:
S1. horizontal grouting back cover is constructed: being accurately positioned drilling horizontal grouting hole, horizontal grouting hole using horizontal directional drilling machine
The about 3m below quasi- excavation building foundation pit elevation, and horizontal through bottom of foundation ditch；After the completion of drilling, using drilling rod as slip casting
Pipe is segmented back using controllable pulsation grouting process and is dragged into row slip casting, by single-layer or multi-layer horizontal grouting hole in bottom of foundation ditch shape
At Horizontal seals；
S2. vertical curtain construction: after horizontal grouting back cover, then in foundation pit surrounding except horizontal grouting hole creeps into starting point
Outer other three face is completely overlapped using vertical grouting curtain with Horizontal seals on one side, that is, forms highly permeable stratum building base
Hole is like box curtain water-stop structure.
Further, horizontal grouting hole described in S1 is arranged along foundation pit bottom horizontal direction, using single layer hole or perforated, on
Under be staggered, sequentially construct in layers.
Further, the single layer hole or perforated, pitch of holes 1.0-2.0m, upper and lower interlamellar spacing are 0.8~1.5m.
Further, it is 0.5~1.0m that drilling rod, which returns and drags the slip casting segment length of slip casting, in S1.
Further, each section of horizontal grouting section of finishing control standard is two-parameter using pulsation grouting pressure and grouting amount
Controlled: when grouting pressure of pulsing reaches not less than 1.0MPa, single hop maximum injection slurry amount volume has reached 600L；Or
Person when minimum injection slurry amount volume reaches 300L, can terminate this section of slip casting when grouting pressure of pulsing reaches 2.0MPa.
Further, for controlling slurries, the fluidity of 5~15 minutes slurries can drop to the grouting serous fluid used in S1
80mm within 30 minutes hereinafter, lose flowability, and compression strength is up to 150~200kPa after 1h, and compression strength is not less than within 1 day
1.0MPa。
Further, the grouting serous fluid used in S1 is controlling slurries, and the controlling slurries are mainly by clay or swollen
Moisten soil, cement, water and additive composition, the additive include in aluminum sulfate, sodium fluoride, waterglass or sodium metaaluminate one kind or
Any combination.
Further, cement in the controlling slurries: clay or bentonite: water: additive mass ratio be 100:100~
200:180~300:3~6.
Further, diaphram wall, whirl spraying piling wall, interlocking pile or the construction method of slip casting can be used in S2 in foundation pit four
Week or except horizontal grouting hole creep into starting point one side in addition to other trihedral at vertical curtain.
Compared with prior art, the invention has the benefit that
The present invention carries out vertical curtain construction after first carrying out Horizontal seals construction again, can quickly carry out first to foundation pit horizontal
Back cover greatlys save project amount, then uses vertical curtain and links together with Horizontal seals structure, so that base pit engineering shape
At the structure of three-dimensional antiseepage, plays the role of supporting and water proof and reinforce base pit engineering, preferably protecting the same of surrounding enviroment
When also save project cost, reduce engineering risk.
Invention increases hole bottom integral strength and rigidity, have the reinforcing of hole bottom and antiseepage double effects, can effectively solve
High artesian to hole bottom stability influence and excavation of foundation pit caused by bottom heave, while preferably reduce crater wall lateral displacement and
The sedimentation and deformation of ambient enviroment, and base pit engineering supporting construction is combined with Groundwater Control two, guarantee foundation work,
Minimize the influence of Construction on Environment while biggish save the cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the top view of a specific embodiment of the invention；
Fig. 2 is A-A cross-sectional view in Fig. 1；
Fig. 3 is B-B cross-sectional view in Fig. 1；
Fig. 4 is pilot hole layout drawing.
Wherein: 1, foundation pit；2, highly permeable stratum；3, Horizontal seals；4, vertical curtain.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is done below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but protection scope of the present invention is not limited to following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art
Together.Technical term used herein is intended merely to the purpose of description specific embodiment, and it is of the invention to be not intended to limitation
Protection scope.
The construction method of the highly permeable stratum building foundation pit Horizontal seals of a specific embodiment of the invention, including it is following
Step:
Step 1: being accurately positioned using horizontal directional drilling machine and creeping into horizontal grouting hole.
According to the calculating such as engine request, formation condition and optimum level injected hole track, determining for horizontal directional drilling machine is utilized
To drilling technology drill straight diameter 100-140mm horizontal grouting hole.Horizontal grouting hole track such as Fig. 2, the embodiment is first oblique from ground
Downwards, then horizontal, thus by 1 partial closure of foundation pit, lateral aperture borehole bottom location should there are with vertical hole (i.e. vertical curtain 4)
Range that effectively overlapped.Horizontal grouting hole is arranged along 1 bottom level direction of foundation pit, using single layer hole or perforated, is staggered up and down,
Such as Fig. 4, pitch of holes 1.0-2.0m, upper and lower interlamellar spacing is 0.8-1.5m.It sequentially constructs, three layers of Kong Shixian construction are uppermost
First layer hole, then nethermost layer hole of constructing, intermediate second layer hole of finally constructing, first I sequence hole, rear II sequence hole, I sequence hole and II
It alternately constructs in the horizontal direction in sequence hole.Sequentially gradually encryption constructs and the density of strengthening stratum on the one hand can be improved；Another party
Face may infer that the formation of grout curtain body by the analysis of post-grouting hole unit midge amount, whether to need to increase and decrease grouting brill
Hole provides foundation.
Step 2: slip casting: when drilling rod time drags after the completion of drilling using horizontal directional drilling machine, dividing segment control note using level
The mode of slurry carries out slip casting in bottom.
It injects controlling slurries and is full of complete opening.It specifically uses in a manner of starching and only starch, carries out slip casting, slip casting segment length using drilling rod
For 0.5~1.0m, using retrusive segmenting slip casting, iterative cycles, until grout hole terminates.Each section of horizontal grouting section of end control
Standard processed is using grouting pressure and grouting amount is two-parameter is controlled: when grouting pressure of pulsing is not less than 1.0MPa, single hop
Maximum injection slurry amount volume has reached 600L；Or when grouting pressure of pulsing reaches 2.5MPa, minimum injection slurry amount volume
When reaching 300L, it can terminate this section of slip casting.
First is repeated to second step, makes to form Horizontal seals 3 in 1 bottom of foundation pit after slip casting, such as Fig. 2 and 3.
Drilling rod, which returns, compared with the vertical Full-face pouring back cover of substrate, after being drilled and drilled using directional drilling machine drags slip casting,
Under reducing, the processes such as Grouting Pipe are pulled out, overall drilling hole amount reduces, can accelerate construction progress, cost is greatly reduced.
Step 3: vertical curtain construction: in highly permeable stratum 2, after the completion of horizontal grouting back cover, by using existing
The construction methods such as mature diaphram wall, whirl spraying piling wall, interlocking pile or slip casting, in 1 surrounding of foundation pit, or except horizontal grouting hole bores
Other three face (such as Fig. 2,3) outside into starting point one side forms closed vertical curtain 4, top view such as Fig. 1, and with Horizontal seals curtain
Curtain is completely overlapped, that is, forms highly permeable stratum foundation pit water-stop structure, foundation pit 1 is surrounded, have antiseepage and reinforcement effect.
The grouting serous fluid of second step is controlling slurries, is mainly made of clay or bentonite, cement, water and additive
Controlling slurries, additive can be Al2(SO4)3It is (aluminum sulfate), NaF (sodium fluoride), waterglass, a kind of or several in sodium metaaluminate
Kind combines, cement in controlling slurries: clay or bentonite: water: additive mass ratio is 100:100~200:180~300:3
~6.
The main performance of controlling slurries are as follows: within 5~15 minutes the fluidity of slurries drop to 80mm hereinafter, 30 minutes it
It inside loses flowability, compression strength is up to 150~200kPa after 1h, and compression strength is not less than 1.0MPa within 1 day.Fluidity detection method
It is carried out by national standard GBT_2419-2005 " flow of cement mortar detection method ".Control fluidity is to guarantee horizontal orientation hole drill
The controllability of slurries and the validity of curtain when bar returns segmenting slip casting when dragging.
The method of above-described embodiment is suitable for the anti-of highly permeable stratum foundation pit and blends water blockoff processing, has following beneficial to effect
Fruit: quickly can carry out Horizontal seals to foundation pit first, control underground water, then connect using vertical curtain and with Horizontal seals structure
It is connected together, so that base pit engineering forms the structure of three-dimensional antiseepage, plays the role of supporting and water proof and reinforce base pit engineering, In
It preferably protects while surrounding enviroment and also saves project cost, reduce engineering risk.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Therefore, it is all not
Be detached from technical solution of the present invention content, according to the present invention technical spirit it is made to the above embodiment it is any it is simple modification, etc.
With variation and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (9)
1. a kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method, which is characterized in that include the steps that following:
S1. horizontal grouting back cover is constructed: being accurately positioned drilling horizontal grouting hole using horizontal directional drilling machine, horizontal grouting hole is located at
The quasi- building foundation pit elevation that excavates is hereinafter, and horizontal through bottom of foundation ditch；After the completion of drilling, using drilling rod as Grouting Pipe, use
Controllable pulsation grouting process, which is segmented back, is dragged into row slip casting, forms horizontal envelope in bottom of foundation ditch by single-layer or multi-layer horizontal grouting hole
Bottom；
S2. vertical curtain construction: after horizontal grouting back cover, then in foundation pit surrounding or except horizontal grouting hole creeps into starting point one
Other three face outside face is completely overlapped using vertical grouting curtain with Horizontal seals, that is, forms highly permeable stratum building foundation pit
Like box curtain water-stop structure.
2. building foundation pit horizontal grouting back cover construction method in highly permeable stratum according to claim 1, which is characterized in that S1
Described in horizontal grouting hole along foundation pit bottom horizontal direction arrange, using single layer hole or perforated, be staggered up and down, in layers sequentially
Construction.
3. building foundation pit horizontal grouting back cover construction method in highly permeable stratum according to claim 2, which is characterized in that institute
Single layer hole or perforated, pitch of holes 1.0-2.0m are stated, upper and lower interlamellar spacing is 0.8~1.5m.
4. building foundation pit horizontal grouting back cover construction method in highly permeable stratum according to claim 1, which is characterized in that S1
It is 0.5~1.0m that middle drilling rod, which returns and drags the slip casting segment length of slip casting,.
5. building foundation pit horizontal grouting back cover construction method in highly permeable stratum according to claim 4, which is characterized in that water
The finishing control standard of each section of flat slip casting section is using pulsation grouting pressure and grouting amount is two-parameter is controlled: when pulsation slip casting
When pressure is reached not less than 1.0MPa, single hop maximum injection slurry amount volume has reached 600L；Or when pulsation grouting pressure reaches
When to 2.5MPa, when minimum injection slurry amount volume reaches 300L, it can terminate this section of slip casting.
6. highly permeable stratum building foundation pit horizontal grouting back cover construction method, feature described according to claim 1~one of 5
It is, for the grouting serous fluid used in S1 for controlling slurries, the fluidity of 5~15 minutes slurries dropped to 80mm hereinafter, 30 minutes
Within lose flowability, compression strength is up to 150~200kPa after 1h, and compression strength is not less than 1.0MPa within 1 day.
7. highly permeable stratum building foundation pit horizontal grouting back cover construction method, feature described according to claim 1~one of 5
It is, the grouting serous fluid used in S1 is controlling slurries, and the controlling slurries are mainly by clay or bentonite, cement, water
It is formed with additive, the additive includes a kind of or any combination in aluminum sulfate, sodium fluoride, waterglass or sodium metaaluminate.
8. building foundation pit horizontal grouting back cover construction method in highly permeable stratum according to claim 7, which is characterized in that institute
State cement in controlling slurries: clay or bentonite: water: additive mass ratio is 100:100~200:180~300:3~6.
9. building foundation pit horizontal grouting back cover construction method in highly permeable stratum according to claim 1, which is characterized in that S2
It is middle that horizontal grouting hole drilling in foundation pit surrounding or is removed using diaphram wall, whirl spraying piling wall, interlocking pile or the construction method of slip casting
Other trihedral outside starting point one side is at vertical curtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822516.7A CN110528523A (en) | 2019-09-02 | 2019-09-02 | A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822516.7A CN110528523A (en) | 2019-09-02 | 2019-09-02 | A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110528523A true CN110528523A (en) | 2019-12-03 |
Family
ID=68666112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910822516.7A Pending CN110528523A (en) | 2019-09-02 | 2019-09-02 | A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110528523A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778978A (en) * | 2020-05-25 | 2020-10-16 | 北京中煤矿山工程有限公司 | Water-rich soft soil foundation pit bottom water sealing and reinforced ground directional horizontal hole grouting process |
| CN111894055A (en) * | 2020-07-31 | 2020-11-06 | 江苏省地质矿产局第三地质大队 | Construction method for correcting deviation and reducing settlement of building by using EPS light soil |
| CN111927480A (en) * | 2020-08-11 | 2020-11-13 | 中国矿业大学 | Construction method of underground continuous blind slot grouting curtain for water-based rock rich in pores |
| CN112081125A (en) * | 2020-10-09 | 2020-12-15 | 北京中岩大地科技股份有限公司 | Bottom sealing structure of foundation pit in submersible sandy gravel stratum and construction process |
| CN112832296A (en) * | 2020-12-31 | 2021-05-25 | 广东大禹水利建设有限公司 | Strong-permeable stratum anti-seepage method for pump station construction |
| CN114108639A (en) * | 2021-11-17 | 2022-03-01 | 上海市机械施工集团有限公司 | Construction method for foundation pit bottom sealing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090091463A (en) * | 2008-02-25 | 2009-08-28 | 코오롱건설주식회사 | Soil retaining method for two rows pile using soil nailing |
| CN104314082A (en) * | 2014-11-12 | 2015-01-28 | 云南建工集团有限公司 | Deep function pit supporting structure in karst geology condition and construction method thereof |
| CN104674827A (en) * | 2015-03-27 | 2015-06-03 | 济南轨道交通集团有限公司 | Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system |
| CN105002913A (en) * | 2015-08-06 | 2015-10-28 | 中铁隆工程集团有限公司 | Strongly-permeable stratum deep foundation pit bottom sealing water stopping structure and construction method thereof |
| CN106837382A (en) * | 2016-12-20 | 2017-06-13 | 北京中煤矿山工程有限公司 | A kind of subway tunnel country rock pre grouting from the surface reinforcement process |
| CN108060908A (en) * | 2017-11-14 | 2018-05-22 | 北京中煤矿山工程有限公司 | Water-rich sand layer long range horizontal orientation drilling grouting and reinforcing technology under groups of building |
-
2019
- 2019-09-02 CN CN201910822516.7A patent/CN110528523A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090091463A (en) * | 2008-02-25 | 2009-08-28 | 코오롱건설주식회사 | Soil retaining method for two rows pile using soil nailing |
| CN104314082A (en) * | 2014-11-12 | 2015-01-28 | 云南建工集团有限公司 | Deep function pit supporting structure in karst geology condition and construction method thereof |
| CN104674827A (en) * | 2015-03-27 | 2015-06-03 | 济南轨道交通集团有限公司 | Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system |
| CN105002913A (en) * | 2015-08-06 | 2015-10-28 | 中铁隆工程集团有限公司 | Strongly-permeable stratum deep foundation pit bottom sealing water stopping structure and construction method thereof |
| CN106837382A (en) * | 2016-12-20 | 2017-06-13 | 北京中煤矿山工程有限公司 | A kind of subway tunnel country rock pre grouting from the surface reinforcement process |
| CN108060908A (en) * | 2017-11-14 | 2018-05-22 | 北京中煤矿山工程有限公司 | Water-rich sand layer long range horizontal orientation drilling grouting and reinforcing technology under groups of building |
Non-Patent Citations (2)
| Title |
|---|
| 蒋硕忠: "《绿色化学灌浆技术》", 31 August 2006, 长江出版社 * |
| 闫立鹏: "富水厚砂卵石层明挖基坑地下水处理", 《铁道建筑技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778978A (en) * | 2020-05-25 | 2020-10-16 | 北京中煤矿山工程有限公司 | Water-rich soft soil foundation pit bottom water sealing and reinforced ground directional horizontal hole grouting process |
| CN111894055A (en) * | 2020-07-31 | 2020-11-06 | 江苏省地质矿产局第三地质大队 | Construction method for correcting deviation and reducing settlement of building by using EPS light soil |
| CN111894055B (en) * | 2020-07-31 | 2022-01-04 | 江苏省地质矿产局第三地质大队 | Construction method for correcting deviation and reducing settlement of building by using EPS light soil |
| CN111927480A (en) * | 2020-08-11 | 2020-11-13 | 中国矿业大学 | Construction method of underground continuous blind slot grouting curtain for water-based rock rich in pores |
| CN111927480B (en) * | 2020-08-11 | 2021-10-29 | 中国矿业大学 | Construction method of underground continuous blind slot grouting curtain for water-based rock rich in pores |
| CN112081125A (en) * | 2020-10-09 | 2020-12-15 | 北京中岩大地科技股份有限公司 | Bottom sealing structure of foundation pit in submersible sandy gravel stratum and construction process |
| CN112832296A (en) * | 2020-12-31 | 2021-05-25 | 广东大禹水利建设有限公司 | Strong-permeable stratum anti-seepage method for pump station construction |
| CN114108639A (en) * | 2021-11-17 | 2022-03-01 | 上海市机械施工集团有限公司 | Construction method for foundation pit bottom sealing |
| CN114108639B (en) * | 2021-11-17 | 2023-06-20 | 上海市机械施工集团有限公司 | Construction method for foundation pit bottom sealing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110528523A (en) | A kind of highly permeable stratum building foundation pit horizontal grouting back cover construction method | |
| CN106545005B (en) | A kind of reinforcing body and reinforcement means of subway tunnel shield end | |
| CN104131575B (en) | A kind of karst height grows the leak stopping water discharge method of the stratum dam foundation | |
| CN108842840A (en) | Perforating causes the weak intercalated layer slip-casting lifting method of building settlement under a kind of compensation subway tunnel | |
| CN104404974B (en) | The thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure and construction technology thereof | |
| CN105672348A (en) | Construction method for cropping bridge pile foundation at sandy gravel stratum of abyssal region | |
| CN206667278U (en) | Lava crack Tunnel gushing treatment constructing structure | |
| CN102286984A (en) | Water-stop curtain and construction method thereof | |
| CN104631438B (en) | Long auger guncreting uplift pile construction method | |
| CN108086328A (en) | A kind of dynamic sealing, assembled building enclosure and its construction method from recharge | |
| CN105201001B (en) | Composite seepage-proofing structure of large karst cave in karst region and construction method thereof | |
| CN105155541B (en) | A kind of dual slurry closure construction method of catch pit | |
| CN108797641A (en) | A kind of structure and its construction method of Underground Subway Station construction period full station sealing | |
| CN108797621A (en) | A kind of water sealing structure and its construction method in rich water depth ovum gravel erratic boulder stratum front pre-grouting | |
| CN202194149U (en) | Water-proof curtain | |
| CN114109394A (en) | Method for determining pile length of tunnel shallow-buried weak surrounding rock high-pressure jet grouting pile method ground surface reinforcement | |
| CN102296621A (en) | Construction method of ground sectional water-stop curtain | |
| CN105019913A (en) | Base rock uplift region shielding tool-changing in-situ reinforcement method | |
| CN109440757A (en) | A kind of foundation reinforcement method for karst region | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN106837340B (en) | The construction method of wall clearance grouting waterproof and reinforcing shaft wall structure under frost wall protection | |
| CN107178077A (en) | Overburden layer grouting and reinforcing structure and its design method on a kind of karst area solution cavity | |
| CN105731978A (en) | Grouting slurry for reinforcing tunnel face of jacking culvert of fine-sand layer and grouting method | |
| CN108915705B (en) | A kind of baffle grouting construction method blocked for shield export & import leak | |
| CN113718752A (en) | Ground diaphragm wall composite grouting method and grouting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191203 |
|
| RJ01 | Rejection of invention patent application after publication |