CN208815554U - A kind of water sealing structure of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum - Google Patents
A kind of water sealing structure of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum Download PDFInfo
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- CN208815554U CN208815554U CN201821156612.XU CN201821156612U CN208815554U CN 208815554 U CN208815554 U CN 208815554U CN 201821156612 U CN201821156612 U CN 201821156612U CN 208815554 U CN208815554 U CN 208815554U
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Abstract
The utility model relates to underground structure field more particularly to a kind of water sealing structures of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum.The water sealing structure includes: side wall grouting sealing layer and bottom ejection for water plugging layer, and the side wall grouting sealing layer is connected with bottom ejection for water plugging layer, forms an overall structure, and isolation foundation pit outside and the water of bottom of foundation ditch enter in foundation pit.Drainage well is set in water sealing structure, the water in foundation pit is extracted out, guarantees that working face without bright water, achievees the purpose that dry slot water harnessing.By using ejection for water plugging structure, large-scale Yield rainfall relation construction is avoided, valuable groundwater resources have been saved, while avoiding the sedimentation and deformation of periphery Nearby Structure caused by Yield rainfall relation is constructed.
Description
[technical field]:
The utility model relates to underground structure fields, especially one kind front pre-grouting in rich water depth ovum gravel erratic boulder stratum
Water sealing structure.
[background technique]:
Underground Construction, general precipitation is leading, but to reinforce the management and protection of groundwater in Beijing resource, reduces water
The waste of resource, prevents related geological disaster, and Construction Commission, Beijing, Bureau of Water Resources, Beijing printed and distributed " Beijing in 2007
Engineering construction precipitation management method ", it then follows protection is preferential, rationally extracts, principle that is paid, comprehensively utilizing of drawing water, to building
If the supervision and management of engineering construction precipitation.It saves and recycles comprehensively to be pushed further into resource, promotion forms Green Development
Mode and life style, the Ministry of Finance, the State Tax Administration, Ministry of Water Resources " expand water resource tax reform in joint publication in 2017
Pilot implementing method ", strict control groundwater overdraft, subsequent Beijing has also accordingly issued implementing method, specifies north
Drainage drop row's underground water amount of tax to be paid in capital city is 4.3 yuan/side.Expense of the subway construction as will be still generated great number using dewatering construction,
Under policy and the main trend of fwaater resources protection, the Groundwater Control scheme of subway construction need to more use sealing scheme.
Currently, the water sealing structure that general water sealing structure is had diaphram wall and formed using freezing process.Freezing process is in skill
It is applied to Large Underground space in art to excavate sealing field to be practicable, but its cost is too high；Diaphram wall is in tunneling
Working space is limited in station, it is difficult to implement.
Therefore, it is desirable to there is a kind of water sealing structure in rich water depth ovum gravel erratic boulder stratum front pre-grouting, rich water can be suitable for
The sealing construction on deep ovum gravel erratic boulder stratum.
[utility model content]:
The purpose of the utility model is to provide a kind of water sealing structures in rich water depth ovum gravel erratic boulder stratum front pre-grouting to come
Solve the above problem of the existing technology.
To achieve the above object, the utility model provides a kind of stopping for front pre-grouting in rich water depth ovum gravel erratic boulder stratum
Water-bound characterized by comprising side wall grouting sealing layer and bottom ejection for water plugging layer, the side wall grouting sealing layer and bottom
Portion's ejection for water plugging layer is connected, and forms an overall structure, and isolation foundation pit outside and the water of bottom of foundation ditch enter in foundation pit.
In some embodiments, preferably, the side wall grouting water sealing horizon is in isosceles-trapezium-shaped in foundation pit surrounding,
Upper width is 3m~4m, and lower width is 4m~5m, and top is located at 1~2m on phreatic line, and lower part is stopped with bottom slip casting
Water layer is concordant.
In some embodiments, preferably, the bottom ejection for water plugging layer is located at bottom of foundation ditch, with a thickness of 5m~6m, only
Away from 1~2m of foundation pit bottom as buffer layer not slip casting, lower part is concordant with side wall grouting sealing layer on water layer top.
In some embodiments, preferably, the inside of the ejection for water plugging layer is arranged multiple injected holes, in the injected hole
Carry out slip casting.
In some embodiments, preferably, vertical drilling is arranged in the injected hole foundation pit, spacing of wells 800mm, between row
It away from 800mm, is arranged using blossom type, is 17.7m at hole length；Side wall use rat holing slip casting, 3 ° of bore angle, 8 °, 13 °,
20 ° and 26 °, drillable length is respectively as follows: 18.1m, 18.3m, 18.1m, 11.7m and 8.0m.
The utility model provides a kind of water sealing structure in rich water depth ovum gravel erratic boulder stratum front pre-grouting, can be applicable in
Sealing supporting in rich water depth ovum gravel erratic boulder stratum.
[Detailed description of the invention]:
Fig. 1 is structural plan schematic diagram in one embodiment.
Fig. 2 is structural profile illustration in one embodiment.
In figure:
1, side wall grouting sealing layer 2, structural envelope stake
3, the vertical injected hole 4 in bottom, the oblique injected hole of side wall
5, bottom of foundation ditch 6, buffer layer
7, slip casting working face 8, phreatic line
9, bottom ejection for water plugging layer
[specific embodiment]:
To keep the purposes, technical schemes and advantages of the utility model implementation clearer, below with reference to the utility model reality
The attached drawing in example is applied, the technical scheme in the embodiment of the utility model is further described in more detail.
In one broad embodiment of the utility model, the sealing knot of front pre-grouting in rich water depth ovum gravel erratic boulder stratum
Structure, comprising: side wall grouting sealing layer and bottom ejection for water plugging layer, the side wall grouting sealing layer are connected with bottom ejection for water plugging layer
It is logical, an overall structure is formed, isolation foundation pit outside and the water of bottom of foundation ditch enter in foundation pit.
As shown in Figs. 1-2, side wall grouting water sealing horizon is in foundation pit surrounding, is in isosceles-trapezium-shaped, upper width 3mm,
Lower width is 5.4m, and top is located at 2m on phreatic line, and lower part is concordant with bottom ejection for water plugging layer.
As shown in Figs. 1-2, ejection for water plugging layer in bottom is located at bottom of foundation ditch, and with a thickness of 5.4m, sealing layer top is away from foundation pit bottom
For 1m as buffer layer not slip casting, lower part is concordant with side wall grouting sealing layer.
As shown in Figs. 1-2, multiple injected holes are arranged in the inside of ejection for water plugging layer, and slip casting is carried out in injected hole.In foundation pit
It arranges that vertical drilling, spacing of wells 800mm are arranged spacing 800mm, arranged using blossom type, is 17.7m at hole length；Side wall is adopted
With rat holing slip casting, 3 °, 8 °, 13 °, 20 ° and 26 ° of bore angle, drillable length be respectively as follows: 18.1m, 18.3m, 18.1m,
11.7m and 8.0m.
The utility model has the advantage that
(1) excessive waste for avoiding groundwater resources caused by dewatering construction, the electricity having saved water resource tax and having used
Take, be also responsive to government's precipitation policy, goodwill and social benefit are significant.
(2) the problem of stratum settlement caused by dewatering construction is big and surrounding buildings settlement deforms is avoided, indirect
Management cost is saved.
(3) solving the problems, such as under the premise that security is guaranteed can be smooth in rich water depth ovum gravel erratic boulder stratum ejection for water plugging
Carry out construction, it is ensured that construction period and reduction security risk, indirect have saved management cost.
The above is only to illustrate the technical solution of the utility model, rather than its limitations, for the technology of this field
For personnel, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of water sealing structure of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum characterized by comprising side wall grouting
Sealing layer and bottom ejection for water plugging layer, the side wall grouting sealing layer are connected with bottom ejection for water plugging layer, form an entirety
The water of structure, isolation foundation pit outside and bottom of foundation ditch enters in foundation pit.
2. a kind of water sealing structure of front pre-grouting in rich water depth ovum gravel erratic boulder stratum according to claim 1, special
Sign is that the side wall grouting water sealing horizon is in isosceles-trapezium-shaped in foundation pit surrounding, and upper width is 3m~4m, and lower part is wide
Degree is 4m~5m, and top is located at 1~2m on phreatic line, and lower part is concordant with bottom ejection for water plugging layer.
3. a kind of water sealing structure of front pre-grouting in rich water depth ovum gravel erratic boulder stratum according to claim 1, special
Sign is that the bottom ejection for water plugging layer is located at bottom of foundation ditch, and with a thickness of 5m~6m, sealing layer top is made away from 1~2m of foundation pit bottom
For buffer layer not slip casting, lower part is concordant with side wall grouting sealing layer.
4. a kind of water sealing structure of front pre-grouting in rich water depth ovum gravel erratic boulder stratum according to claim 1, special
Sign is that multiple injected holes are arranged in the inside of the ejection for water plugging layer, carries out slip casting in the injected hole.
5. a kind of water sealing structure of front pre-grouting in rich water depth ovum gravel erratic boulder stratum according to claim 4, special
Sign is, arranges that vertical drilling, spacing of wells 800mm are arranged spacing 800mm, arranged using blossom type in the injected hole foundation pit,
It is 17.7m at hole length；Side wall uses rat holing slip casting, and 3 °, 8 °, 13 °, 20 ° and 26 ° of bore angle, drillable length is respectively as follows:
18.1m, 18.3m, 18.1m, 11.7m and 8.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821156612.XU CN208815554U (en) | 2018-07-20 | 2018-07-20 | A kind of water sealing structure of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821156612.XU CN208815554U (en) | 2018-07-20 | 2018-07-20 | A kind of water sealing structure of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum |
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| Publication Number | Publication Date |
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| CN208815554U true CN208815554U (en) | 2019-05-03 |
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| CN201821156612.XU Active CN208815554U (en) | 2018-07-20 | 2018-07-20 | A kind of water sealing structure of the front pre-grouting in rich water depth ovum gravel erratic boulder stratum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797621A (en) * | 2018-07-20 | 2018-11-13 | 中铁十八局集团有限公司 | A kind of water sealing structure and its construction method in rich water depth ovum gravel erratic boulder stratum front pre-grouting |
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2018
- 2018-07-20 CN CN201821156612.XU patent/CN208815554U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797621A (en) * | 2018-07-20 | 2018-11-13 | 中铁十八局集团有限公司 | A kind of water sealing structure and its construction method in rich water depth ovum gravel erratic boulder stratum front pre-grouting |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190426 Address after: 300222 Shuanggang Town, Jinnan District, Tianjin Co-patentee after: China Railway 18 Bureau Group Municipal Engineering Co., Ltd. Patentee after: the Eighteenth Bureau of China's Railroad Group Co., Ltd. Address before: 300222 Shuanggang Town, Jinnan District, Tianjin Patentee before: the Eighteenth Bureau of China's Railroad Group Co., Ltd. |