CN104404974B - The thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure and construction technology thereof - Google Patents
The thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure and construction technology thereof Download PDFInfo
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- CN104404974B CN104404974B CN201410711554.2A CN201410711554A CN104404974B CN 104404974 B CN104404974 B CN 104404974B CN 201410711554 A CN201410711554 A CN 201410711554A CN 104404974 B CN104404974 B CN 104404974B
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- 238000007569 slipcasting Methods 0.000 title claims abstract description 98
- 238000010276 construction Methods 0.000 title claims abstract description 33
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 112
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 238000005192 partition Methods 0.000 claims abstract description 18
- 238000005728 strengthening Methods 0.000 claims abstract description 11
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 239000004568 cement Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000003487 anti-permeability effect Effects 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000209202 Bromus secalinus Species 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The present invention has announced the thick sand-pebble layer deep basal pit of high artesian slip casting back cover slip casting structure and construction technology thereof, comprise and insert underground water-stop curtain, below water-stop curtain, be formed with slurry base plate, slurry side wall and slurry partition wall by slip casting, described slurry side wall and water-stop curtain are closely cementing, slurry base plate, slurry side wall and slurry partition wall are enclosed in substrate and form multiple U-shaped slip casting storehouses to lower recess, and above slurry base plate, secondary grouting is formed with slurry strengthening course. U-shaped slip casting chamber structure of the present invention has increased bulk strength and rigidity at the bottom of hole, possess the reinforcing of the end, hole and antiseepage double effects, can effectively solve high artesian that buried depth strengthens to hole end stability influence and the bottom heave that causes of excavation of foundation pit, reduce preferably the sedimentation and deformation of hole wall lateral displacement and surrounding environment simultaneously.
Description
Technical field
The present invention relates to the artesian water process field of thick sand-pebble layer deep-foundation pit engineering, specifically refer to the thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure and construction technology thereof.
Background technology
At present, in deep-foundation pit engineering, conventionally adopt that the outer precipitation in hole, curtain vertically cut off, three kinds of methods of the full slip casting back cover of substrate solve the engineering problem that artesian water causes.
The first is the outer precipitation method in hole, the mentality of designing of the method is: adopt diaphram wall or drilled pile, interlocking pile and corresponding water-stop curtain etc. as building enclosure, after building enclosure is carried out, first cheat inside and outside dewatering confined water construction, carry out excavation drop to the absolute altitude of designing requirement at artesian water head after. The advantage of the method is, constructs more convenient, and construction quality can ensure. The shortcoming of the method is, precipitation unavoidably causes the sedimentation of foundation ditch surrounding enviroment and relative settlement, the especially engineering in the very deficient area of water resource and the engineering that sedimentation and deformation is had relatively high expectations, and this scheme is forbidden to adopt; At the higher sand-pebble layer of artesian head, the water content of artesian aquifer is abundant, Rainfall Influence scope is wide, pump-out is large, the time of dewatering confined water is long, and precipitation expense and difficulty are very high, higher to the power demands at construction management, municipal drainage and scene, when power-off, emergency plan enforcement difficulty is high, and in hole, dewatering well sealing also has suitable risk.
The second is that curtain vertically cuts off method, the mentality of designing of the method is: adopt diaphram wall or drilled pile, interlocking pile and corresponding water-stop curtain as building enclosure, water-stop curtain inserts the impermeable stratum certain depth under artesian aquifer, reaches vertical partition artesian water object. The advantage of the method is that the excavation of foundation pit stage does not need dewatering confined water, construction risk and relatively little on the impact of surrounding environment; Construction quality can ensure. The shortcoming of the method is, the degree of depth of water-stop curtain is large, and the in the situation that particularly and buried depth thicker at artesian aquifer being darker, water-stop curtain inserts deep layer impermeable stratum, very high to the requirement of construction technology and construction machinery. Water-stop curtain is darker, is more difficult to ensure perpendicularity and the leak tightness of card water-stop curtain, once there is the situation that curtain leaks in digging process, prominent gushing very easily occurs, and consequence is serious, and is difficult to judge breakthrough.
The third is substrate gamut slip casting back cover method, the mentality of designing of the method is: adopt diaphram wall or drilled pile, interlocking pile and corresponding water-stop curtain as building enclosure, substrate adopts gamut slip casting water proof, utilizes injecting cement paste deadweight opposing artesian pressure. The advantage of the method is that the excavation of foundation pit stage does not need dewatering confined water, construction risk and relatively little on the impact of surrounding environment; Construction quality can ensure. The shortcoming of the method is, grouting amount is very large, and the in the situation that particularly and buried depth thicker at artesian aquifer being darker, slip casting appropriate litigation fees is high. Once injecting cement paste has local quality problems, leaking appears in substrate, and underground water is rushed to rock-soil layer in substrate, after string water, is difficult to judge leakage area, and be also difficult to carry out the processing of specific aim compensation and grouting, gamut compensation and grouting is costly, and the duration is slow.
Summary of the invention
The object of the present invention is to provide the thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure and construction technology thereof, solve the grouting amount that in prior art, substrate gamut slip casting back cover method exists large, expense is high, long in time limit, leaking appears in substrate, underground water is rushed to rock-soil layer in substrate, is difficult to judge the problem of leakage area after string water.
The thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure, comprise and insert underground water-stop curtain, below water-stop curtain, be formed with slurry base plate, slurry side wall and slurry partition wall by slip casting, described slurry side wall and water-stop curtain are closely cementing, slurry base plate, slurry side wall and slurry partition wall are enclosed in substrate and form multiple U-shaped slip casting storehouses to lower recess, and above slurry base plate, secondary grouting is formed with slurry strengthening course. the present invention adopts existing equipment in deep foundation pit construction, creatively to propose the U-shaped point storehouse slip casting back cover structure of U-shaped, the slurry base plate that slip casting forms, slurry side wall, slurry partition wall encloses the U-shaped slip casting storehouse back cover structure that forms bottom lock, entirely descending in foundation pit construction process, because substrate is divided into the U-shaped slip casting storehouse back cover structure that several are separated from each other successively, when occurring in certain U-shaped slip casting storehouse that water level raises suddenly or water yield situation jumpy, can judge in this U-shaped slip casting storehouse and occur leakage point, only need carry out pump drainage and the processing of after-teeming slurry to this slip casting storehouse. with present techniques scheme the most approach be substrate gamut slip casting back cover scheme, this scheme grouting amount is very large, the in the situation that particularly and buried depth thicker at artesian aquifer being darker, slip casting appropriate litigation fees is high. once injecting cement paste has local quality problems, leaking appears in substrate, and underground water is rushed to rock-soil layer in substrate, after string water, is difficult to judge leakage area, and be also difficult to carry out the processing of specific aim compensation and grouting, gamut compensation and grouting is costly, and the duration is slow, and the application's technical scheme just can overcome the problem that substrate gamut slip casting back cover scheme exists, once find local infiltration, can prominent gush occur before discovery seepage place in time, and there is enough buffer time to carry out the compensation and grouting processing that specific aim is stronger, not only reduce overall cost, and utilized Rock And Soil deadweight opposing artesian pressure, compared the full slip casting back cover of substrate, grouting amount significantly reduces, and greatly reduces engineering cost and duration, form slurry side wall and slurry partition wall by slip casting, substrate is separated into multiple U-shaped slip castings storehouse, dewatering well and water-level observation hole are set in each slip casting storehouse, once certain storehouse water-level observation hole water level or the water yield sharply change, can compensate in time slip casting processing for this storehouse in time, carry out if desired backfill back-pressure, in storehouse, also there is certain water storage space, reserve buffer time to emergency processing, in addition, point storehouse compensation and grouting can safeguard measure specific aim, also reduced disposal cost and duration, U-shaped slip casting chamber structure has increased bulk strength and rigidity at the bottom of hole, possess the reinforcing of the end, hole and antiseepage double effects, can effectively solve high artesian that buried depth strengthens to hole end stability influence and the bottom heave that causes of excavation of foundation pit, reduce preferably the sedimentation and deformation of hole wall lateral displacement and surrounding environment simultaneously.
Slurry base plate, the slurry side wall in described U-shaped slip casting storehouse form by sleeve valve pipe note biliquid slurry.
Described U-shaped slip casting storehouse, slurry partition wall and slurry strengthening course note single liquid slurry by sleeve valve pipe and form. Further, the application's technical scheme half sleeve valve pipe slip casting warehouse first adopts the biliquid slurry that gel time is short, consolidation strength is high, form rapidly injecting cement paste for water proof on high artesian stratum, utilize slurry base plate and slurry side wall to carry out water proof, then adopt cheap, technique is simple, anti-permeability performance good, set strength is high single liquid slurry to carry out reinforcement, further consolidate slip casting effect, both ensured the requirement of substrate slip casting back cover, there is again stronger economy.
In each U-shaped slip casting storehouse, water-level observation hole and dewatering well are all set. When water level or the water yield sharply change in storehouse, can be used for pump drainage and the processing of sleeve valve pipe compensation and grouting in storehouse.
The construction technology of the thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure, comprises the following steps:
(a), according to artesian water water pressure and the excavation of foundation pit degree of depth, determine the curtain degree of depth, bottom, the substrate U-shaped slip casting storehouse degree of depth, slurry base plate thickness, slurry side wall thicknesses, slurry side wall and the superimposed degree of depth of curtain;
(b) construction building enclosure: utilize diaphram wall, interlocking pile or drilled pile to form corresponding water-stop curtain;
(c) adopt the grouting of sleeve valve pipe grouting process to build to form on ground and there is the grouting back cover structure in multiple U-shaped slip castings storehouse, and be built up integrally closed structure with water-stop curtain;
(d) apply dewatering well and water-level observation hole in hole, by underground water drainage in storehouse;
(e) layer and section excavates from the top down, and sets up inner support in time, until be excavated to substrate;
(f) return and build agent structure along way by open cut, sequentially remove inner support, top board backfill.
In construction technology of the present invention, tuck inside the sleeve the slip casting degree of depth, grouting amount and the injection speed of valve pipe at the U-lag of underground formation slip casting structure by control, thereby the subregion of realizing subterranean layer is controlled, for the full slip casting back cover of substrate of the prior art scheme, duration shortens, and the risk of infiltration reduces greatly, and permeable specified place is convenient to excavate and control, be convenient to find in time permeable point, greatly reduce the permeable risk of foundation ditch.
Described step (c) comprises the following steps:
(c1) first adopt sleeve valve pipe slip casting construction method note biliquid slurry, form slurry base plate and slurry side wall, the bottom of slurry side wall and water-stop curtain is closely connected, and slurry base plate, slurry side wall and water-stop curtain form substrate U-shaped slip casting storehouse back cover structure jointly;
(c2) then adopt sleeve valve pipe slip casting construction method to note single liquid slurry, form slurry partition wall, U-shaped slip casting storehouse is separated into multiple U-shaped slip castings storehouse;
(c3) finally adopt sleeve valve pipe slip casting construction method to note single liquid slurry, above slurry base plate, carry out secondary grouting, form slurry strengthening course.
Further, the application's technical scheme half sleeve valve pipe slip casting warehouse first adopts the biliquid slurry that gel time is short, consolidation strength is high, form rapidly injecting cement paste for water proof on high artesian stratum, utilize slurry base plate and slurry side wall to carry out water proof, then adopt cheap, technique is simple, anti-permeability performance good, set strength is high single liquid slurry to carry out reinforcement, further consolidate slip casting effect, both ensured the requirement of substrate slip casting back cover, there is again stronger economy.
The present invention compared with prior art, has following advantage and beneficial effect:
1, the thick sand-pebble layer deep basal pit of high artesian of the present invention slip casting back cover structure and construction technology thereof, form slurry partition wall by slip casting, U-shaped substrate slip casting storehouse is separated into multiple slip castings storehouse, each slip casting storehouse arranges dewatering well and water-level observation hole, once certain storehouse water-level observation hole water level or the water yield sharply change, can compensate in time slip casting processing for this storehouse in time, carry out if desired backfill back-pressure, in storehouse, also there is certain water storage space, reserve buffer time to emergency processing, in addition, point storehouse compensation and grouting can safeguard measure specific aim, also disposal cost and duration have been reduced, U-shaped slip casting chamber structure has increased bulk strength and rigidity at the bottom of hole, possess the reinforcing of the end, hole and antiseepage double effects, can effectively solve high artesian that buried depth strengthens to hole end stability influence and the bottom heave that causes of excavation of foundation pit, reduce preferably the sedimentation and deformation of hole wall lateral displacement and surrounding environment simultaneously,
2, the thick sand-pebble layer deep basal pit of high artesian of the present invention slip casting back cover structure and construction technology thereof, first adopt the biliquid slurry that gel time is short, consolidation strength is high, form rapidly injecting cement paste for water proof on high artesian stratum, utilize slurry base plate and slurry side wall to carry out water proof, then adopt cheap, technique is simple, anti-permeability performance good, set strength is high single liquid slurry to carry out reinforcement, further consolidate slip casting effect, both ensured the requirement of substrate slip casting back cover, there is again stronger economy;
3, the thick sand-pebble layer deep basal pit of high artesian of the present invention slip casting back cover structure and construction technology thereof, slurry side wall and water-stop curtain that slip casting forms are closely cementing, prevent that slip casting warehouse and water-stop curtain joint place from seepage erosion occurring, and also makes up the leakage problems of not sealing because of construction reason curtain.
Brief description of the drawings
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms the application's a part, does not form the restriction to the embodiment of the present invention. In the accompanying drawings:
Fig. 1 is the U-shaped slip casting storehouse schematic cross section of foundation ditch of the present invention;
Fig. 2 is vertical section, the U-shaped slip casting storehouse schematic diagram of foundation ditch of the present invention;
Fig. 3 is the top view in the U-shaped slip casting storehouse of foundation ditch of the present invention;
Fig. 4 is according to the structural representation of substrate gamut slip casting back cover in embodiment;
Fig. 5 is the constructing structure schematic diagram according to structure of the present invention in embodiment.
Mark and corresponding parts title in accompanying drawing:
1-water-stop curtain, 2-base plate, 3-side wall, 4-partition wall, 5-strengthening course, 6-inner support, 7-agent structure, 8-actual water level.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment
The present embodiment is Beijing Metro station, and its length is 139.2m, and standard paragraphs foundation depth is 31.6m, width 24.9m. Station base plate is mainly positioned at the boulder bed that water penetration is very strong, cheats outer pressure water head apart from hole end 13m.
According to substrate gamut slip casting back cover scheme in prior art: building enclosure adopts the thick diaphram wall of 1.0m, building-in depth 15m, substrate 15m scope adopts sleeve valve Guan Mantang slip casting, its at the middle and upper levels 12m scope note single liquid slurry, the 3m of lower floor scope note biliquid slurry, as shown in Figure 4. Through estimation, building enclosure cost approximately 6,229 ten thousand, slip casting expense 11,280 ten thousand, 3 months slip casting durations.
And in actual work progress, its constructing structure as shown in Figures 1 to 3,
(a), according to artesian water water pressure and the excavation of foundation pit degree of depth, determine 9 meters of water-stop curtain 1 degree of depth, 15 meters of the degree of depth in bottom, substrate U-shaped slip casting storehouse, 3 meters of slurry base plate 2 thickness, 2 meters of slurry side wall 3 thickness, slurry side wall 4 and 9 meters of the superimposed degree of depth of water-stop curtain 1;
(b) construction building enclosure: adopt the thick diaphram wall of 1.0m to form corresponding water-stop curtain 1;
(c1) first adopt sleeve valve pipe slip casting construction method note biliquid slurry, formation slurry base plate 2 and slurry side wall 3 slurry side walls 3 are closely connected with the bottom of water-stop curtain 1, and slurry base plate 2, slurry side wall 3 and water-stop curtain form substrate U-shaped slip casting storehouse back cover structure jointly; The thick 3m of slurry base plate 2, the thick 2m of slurry side wall 3, slurry side wall 3 and the closely connected superimposed 9m of diaphram wall;
(c2) then adopt sleeve valve pipe slip casting construction method to note single liquid slurry, form slurry partition wall 4, U-shaped slip casting storehouse is separated into multiple U-shaped slip castings storehouse, the thick 2m of slurry partition wall;
(c3) finally adopt sleeve valve pipe slip casting construction method to note single liquid slurry, above slurry base plate, carry out secondary grouting, form slurry strengthening course 5, slurry reinforcement bed thickness 2m;
(d) apply dewatering well and water-level observation hole in hole, by underground water drainage in storehouse;
(e) layer and section excavates from the top down, and sets up in time inner support 6, until be excavated to substrate;
(f) return and build agent structure 7 along way by open cut, sequentially remove inner support 6, top board backfill.
Building enclosure adopts the thick diaphram wall of 1.0m, building-in depth 9m, substrate 15m scope adopts sleeve valve pipe U-shaped U-shaped to divide storehouse slip casting back cover, the wherein thick 3m of slurry base plate, all thick 2m of slurry side wall, slurry partition wall and slurry strengthening course, the closely connected superimposed 9m of slurry side wall and diaphram wall, slurry base plate and side wall note biliquid slurry, slurry partition wall and strengthening course are noted single liquid slurry. Construction size as shown in Figure 5, through estimation, building enclosure cost approximately 5,370 ten thousand, slip casting expense 5,264 ten thousand, 1.5 months slip casting durations.
In sum, adopt after substrate U-shaped U-shaped of the present invention point storehouse slip casting back cover scheme, building enclosure expense saves 8,590,000, and slip casting expense saves 6,016 ten thousand, and the duration is saved 1.5 months.
Above-described detailed description of the invention; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. the construction technology of the thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure, is characterized in that, comprises the following steps:
(a), according to artesian water water pressure and the excavation of foundation pit degree of depth, determine the curtain degree of depth, bottom, the substrate U-shaped slip casting storehouse degree of depth, slurry base plate (2) thickness, slurry side wall (3) thickness, slurry side wall (3) and the superimposed degree of depth of curtain;
(b) construction building enclosure: utilize diaphram wall, interlocking pile or drilled pile to form corresponding water-stop curtain (1);
(c) adopt sleeve valve pipe grouting process to form slurry base plate (2) in the slip casting of the below of water-stop curtain (1) on ground, slurry side wall (3), and slurry partition wall (4), described slurry side wall (3) is closely cementing with water-stop curtain (1), slurry base plate (2), slurry side wall (3), and slurry partition wall (4) is enclosed in substrate and forms multiple U-shaped slip casting storehouses to lower recess, in slurry base plate (2) top, secondary grouting is formed with slurry strengthening course (5), multiple U-shaped slip casting storehouses to lower recess and slurry strengthening course (5) form bottom back cover structure, bottom back cover structure and water-stop curtain (1) are built up deep basal pit slip casting back cover structure,
(d) in each U-shaped slip casting storehouse, water-level observation hole and dewatering well are all set, by underground water drainage in storehouse;
(e) layer and section excavates from the top down, and sets up inner support in time (6), until be excavated to substrate;
(f) return and build agent structure (7) along way by open cut, sequentially remove inner support (6), top board backfill.
2. the construction technology of the thick sand-pebble layer deep basal pit of high artesian according to claim 1 slip casting back cover structure, is characterized in that, described step (c) comprises the following steps:
(c1) first adopt sleeve valve pipe grouting process note biliquid slurry, form slurry base plate (2) and slurry side wall (3), slurry side wall (3) is closely connected with the bottom of water-stop curtain, and slurry base plate (2), slurry side wall (3) and water-stop curtain form substrate U-shaped slip casting storehouse back cover structure jointly;
(c2) then adopt sleeve valve pipe grouting process to note single liquid slurry, form slurry partition wall, U-shaped slip casting storehouse is separated into multiple U-shaped slip castings storehouse;
(c3) finally adopt sleeve valve pipe grouting process to note single liquid slurry, above slurry base plate, carry out secondary grouting, form slurry strengthening course (5).
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| CN105019913A (en) * | 2015-08-03 | 2015-11-04 | 中铁六局集团有限公司 | Base rock uplift region shielding tool-changing in-situ reinforcement method |
| CN105002913B (en) * | 2015-08-06 | 2017-07-11 | 中铁隆工程集团有限公司 | A kind of highly permeable stratum deep basal pit back cover water sealing structure and its construction method |
| CN106609508A (en) * | 2015-10-22 | 2017-05-03 | 中铁十四局集团有限公司 | Construction technology and construction method for large-particle-size pebble stratum super-deep foundation pit in strong water permeation environment of Yellow River flood plain |
| CN105586974B (en) * | 2016-02-05 | 2018-11-13 | 中国电建集团华东勘测设计研究院有限公司 | A kind of foundation pit retaining structure design method |
| CN106836248A (en) * | 2017-01-16 | 2017-06-13 | 中国建筑第八工程局有限公司 | The water storage structure and its construction method of basement |
| CN108797620A (en) * | 2018-05-25 | 2018-11-13 | 北京地矿工程建设有限责任公司 | A kind of OPT construction method of interlocking pile |
| CN109403332B (en) * | 2018-09-25 | 2020-06-02 | 中建五局土木工程有限公司 | Method for combined excavation of layered bench sections of deep foundation pit of sandy cobble thick covering layer wide shallow valley |
| CN111560958A (en) * | 2020-05-06 | 2020-08-21 | 中铁隆工程集团有限公司 | Construction method of water-rich deep foundation pit in silty clay stratum |
| CN114703921B (en) * | 2020-09-11 | 2024-05-28 | 北京住总集团有限责任公司 | A construction method for preventing sudden surge based on temporary bottom sealing structure |
| CN112832278A (en) * | 2020-12-30 | 2021-05-25 | 中铁二十局集团第一工程有限公司 | Foundation pit, water-resisting structure and construction method thereof |
| CN112854271B (en) * | 2021-01-15 | 2022-09-16 | 北京市市政四建设工程有限责任公司 | Method for blocking water among separated island type underground excavation station piles |
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| JP2576932B2 (en) * | 1992-08-20 | 1997-01-29 | 鹿島建設株式会社 | Construction method of independent mountain retaining wall |
| CN101775810A (en) * | 2010-02-04 | 2010-07-14 | 天津大学 | Underground water control construction method in foundation pit dewatering project |
| CN102966109A (en) * | 2012-11-05 | 2013-03-13 | 天津二十冶建设有限公司 | Method for constructing zonal deep foundation pit bottom sealing of soft soil foundation |
| CN103993603B (en) * | 2014-05-30 | 2015-12-09 | 中冶沈勘工程技术有限公司 | A kind of anchor pole churning back cover deep foundation ditch reversed construction method without dewatering operation |
| CN204252148U (en) * | 2014-12-01 | 2015-04-08 | 中铁隆工程集团有限公司 | High artesian thick sand-pebble layer deep foundation ditch slip casting back cover structure |
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