CN116770910A - Ultra-deep foundation pit permanent-facing combined underground continuous wall leakage repairing method - Google Patents
Ultra-deep foundation pit permanent-facing combined underground continuous wall leakage repairing method Download PDFInfo
- Publication number
- CN116770910A CN116770910A CN202310618209.3A CN202310618209A CN116770910A CN 116770910 A CN116770910 A CN 116770910A CN 202310618209 A CN202310618209 A CN 202310618209A CN 116770910 A CN116770910 A CN 116770910A
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- CN
- China
- Prior art keywords
- grouting
- ultra
- diaphragm wall
- foundation pit
- deep foundation
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 239000004593 Epoxy Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 6
- 229920006333 epoxy cement Polymers 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 238000007790 scraping Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The application discloses a leakage repairing method of a forever combined diaphragm wall of an ultra-deep foundation pit, which aims at the forever combined diaphragm wall of the ultra-deep foundation pit, in the leakage repairing construction process, modified epoxy slurry is used as a waterproof material, slotting is carried out firstly, then sealing is carried out, and then the modified epoxy slurry is poured into a sealed cavity after sealing through a pre-buried grouting nozzle, so that the leakage problem of the diaphragm wall is fundamentally solved, and the diaphragm wall of a temporary support system can be used as a part of a permanent structure. The application solves the problem that the traditional underground continuous wall leakage water stopping method cannot be suitable for the underground continuous wall of the permanently faced structure basement.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a method for repairing leakage of a permanent-facing combined diaphragm wall of an ultra-deep foundation pit.
Background
In the basement construction process, water leakage phenomenon often occurs due to structural cracking, honeycomb, construction joints and the like, at the moment, foaming polyurethane grouting is usually used for water stopping, but the material can leave a leakage repairing trace, meanwhile, the structure is damaged considerably, long-term blocking of a water leakage part is difficult to keep, waterproof blocking cannot be achieved fundamentally, only temporary water stopping can be performed, and the method is naturally not feasible in a basement structure (a basement with a diaphragm wall as a permanent structure) which is permanently combined.
The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
In order to overcome the defects existing in the prior art, an ultra-deep foundation pit permanent-face combined underground continuous wall leakage repairing method is provided, so that the problem that the traditional underground continuous wall leakage water stopping method cannot be suitable for underground continuous walls of a permanent-face structure basement is solved.
In order to achieve the purpose, the method for repairing the leakage of the ultra-deep foundation pit permanent-temporary combined diaphragm wall comprises the following steps:
determining the position of a water seepage crack of a diaphragm wall of a basement structure of a permanent structure;
cutting a V-shaped groove along the length direction of the water seepage crack of the diaphragm wall;
embedding a plurality of grouting nozzles in the V-shaped groove, wherein the grouting nozzles are arranged at intervals along the length direction of the V-shaped groove;
providing sealing cement, filling the sealing cement into the notch of the V-shaped groove to be solidified into a sealing plate, so that a closed cavity is formed by enclosing the sealing plate and the groove bottom of the V-shaped groove;
preparing modified epoxy slurry;
pouring the modified epoxy slurry into the closed cavity through the grouting nozzle;
and removing the grouting nozzle, and sealing by using epoxy cement.
Further, the V-shaped groove is 30mm in groove width and 20mm in groove depth.
Further, the distance between adjacent grouting nozzles is 350-400 mm.
Further, the sealing cement comprises quick-setting cement and sealing glue.
Further, when the modified epoxy slurry is poured, a plurality of grouting nozzles are poured one by one from one end of the V-shaped groove to the other end of the V-shaped groove, and each grouting is based on the slurry leakage of the adjacent grouting nozzles.
Further, when each grouting nozzle is grouted, the grouting pressure is 0.2 Mpa-0.4 Mpa, and the grouting pressure should be gradually increased.
Further, in the grouting process, when the grouting rate is smaller than 0.1L/min, grouting is stopped after the grouting is continued for 1-2 min.
The ultra-deep foundation pit permanent-face combined diaphragm wall leakage repairing method has the advantages that the modified epoxy slurry is used as a waterproof material in the leakage repairing construction process, slotting is performed first, sealing is performed, and then the modified epoxy slurry is poured into the sealed cavity after sealing through the pre-buried grouting nozzle, so that the diaphragm wall leakage problem is fundamentally solved, and the diaphragm wall of the temporary support system can be used as a part of a permanent structure.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a method for repairing leakage of a permanently-bonded diaphragm wall of an ultra-deep foundation pit in an embodiment of the application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, the application provides a method for repairing leakage of a forever-adjacent combined diaphragm wall of an ultra-deep foundation pit, which comprises the following steps:
s1: the location of the wall-to-wall water seepage crack 10 of the permanent structural basement structure 1 is determined.
In this embodiment, the water seepage crack 10 of the wall is such as the crack at the joint of the floor slab and the wall, the joint of the wall and the supporting beam, the joint of the I-steel of each wall (expansion joint), the wall surface of the wall, etc.
First, the position of the underground diaphragm wall water seepage crack 10 of the permanently adjacent structure basement structure is determined by searching the original water seepage position of the basement or the water seepage position.
The required construction tools and materials should be prepared and placed reasonably and orderly before construction begins. And performing site enclosure treatment on the part needing construction.
S2: v-grooves are cut along the length direction of the wall-connected water seepage cracks 10.
As a preferred embodiment, the V-shaped groove has a groove width of 30mm and a groove depth of 20mm.
S3: a plurality of grouting nozzles 2 are buried in the V-shaped groove, and the grouting nozzles 2 are arranged at intervals along the length direction of the V-shaped groove.
As a preferred embodiment, the spacing between adjacent grouting nozzles is 350-400 mm.
The crack adopts manual chiseling to form a V-shaped groove with the width of 30mm and the depth of 20mm. After cleaning the V-shaped groove, embedding a phi 8 grouting nozzle along the crack at intervals of 350-400 mm (including the end part of the crack).
S4: and providing sealing cement, filling the sealing cement into the notch of the V-shaped groove to be solidified to form a sealing plate 3, so that a sealed cavity is formed by enclosing between the sealing plate 3 and the bottom of the V-shaped groove.
As a preferred embodiment, the sealing cement comprises quick setting cement and a sealing glue.
The sealing plate is used for sealing the seam so that the seam forms a closed cavity. And a small scraper knife is used for scraping the quick-hardening cement (such as plugging agent) blended with the sealing glue along the two sides of the crack within the range of 25mm to the crack, so that the small holes and bubbles are prevented from being generated during glue scraping, the scraping is smooth, and the tight and reliable sealing is ensured. Grouting construction can be performed after the joint sealing glue reaches the strength.
S5: a modified epoxy slurry 4 was prepared.
The grouting material is required to have strong adhesion. The pourability is good. The engineering adopts modified epoxy slurry as filling liquid, and the modified epoxy slurry and the curing agent are proportioned according to a proportion. The amount of the modified epoxy slurry prepared at one time should not be excessive, and should be used for 40-50 minutes.
S6: the modified epoxy slurry 4 is poured into the closed cavity via a grouting nozzle.
When the modified epoxy slurry is poured, a plurality of grouting nozzles are poured one by one from one end of the V-shaped groove to the other end of the V-shaped groove, and each grouting is based on the slurry leakage of the adjacent grouting nozzles.
When each grouting nozzle is grouted, the grouting pressure is 0.2-0.4Mpa, and the grouting pressure should be gradually increased.
In the grouting process, when the grouting rate is smaller than 0.1L/min, grouting is stopped after the grouting is continued for 1-2 min.
Specifically, the grouting equipment is a manual grouting machine, all the equipment should be checked and a pipeline is connected during grouting, and after dust in a pore canal and a crack is blown out by compressed air, the grouting is performed from one end of the crack to the other end of the crack. The grouting pressure is 0.2-0.4Mpa, the pressure should be gradually increased, and the crack expansion caused by crack bursting due to sudden pressurization is prevented. Each grouting is based on the slurry overflow of adjacent nozzles. Sealing holes by using epoxy glue immediately after slurry discharge; and (5) sequentially pressing and pouring until the last nozzle emits slurry. And (5) keeping constant pressure and continuing to press irrigation after hole sealing. And stopping grouting after the grouting is continued for 1-2min when the grouting rate is smaller than 0.1L/min. After grouting, the site should be cleaned immediately.
S7: and removing the grouting nozzle and sealing with epoxy cement.
After grouting, when the slurry in the seam is initially set and does not flow out, the grouting nozzle can be pulled out, and the grouting hole is sealed by epoxy cement and smoothed.
The traditional diaphragm wall is only used as a temporary support system for foundation pit excavation, and a circle of side walls are arranged on the basement, so that the waterproof leakage requirement on the diaphragm wall is not high. The ultra-deep foundation pit permanent-face combined diaphragm wall leakage repairing method provided by the application aims at the ultra-deep foundation pit permanent-face combined diaphragm wall, and in the leakage repairing construction process, modified epoxy slurry is used as a waterproof material, slotting is carried out firstly, then sealing is carried out, and further, the modified epoxy slurry is poured into a sealed cavity after sealing through a pre-buried grouting nozzle, so that the problem of diaphragm wall leakage is fundamentally solved, and the diaphragm wall of a temporary support system can be used as a part of a permanent structure.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (7)
1. The ultra-deep foundation pit permanent-facing combined diaphragm wall leakage repairing method is characterized by comprising the following steps of:
determining the position of a water seepage crack of a diaphragm wall of a basement structure of a permanent structure;
cutting a V-shaped groove along the length direction of the water seepage crack of the diaphragm wall;
embedding a plurality of grouting nozzles in the V-shaped groove, wherein the grouting nozzles are arranged at intervals along the length direction of the V-shaped groove;
providing sealing cement, filling the sealing cement into the notch of the V-shaped groove to be solidified into a sealing plate, so that a closed cavity is formed by enclosing the sealing plate and the groove bottom of the V-shaped groove;
preparing modified epoxy slurry;
pouring the modified epoxy slurry into the closed cavity through the grouting nozzle;
and removing the grouting nozzle, and sealing by using epoxy cement.
2. The ultra-deep foundation pit permanent-face combined diaphragm wall leakage repairing method according to claim 1, wherein the groove width of the V-shaped groove is 30mm, and the groove depth is 20mm.
3. The ultra-deep foundation pit permanent-face combined diaphragm wall leakage repairing method according to claim 1, wherein the distance between adjacent grouting nozzles is 350-400 mm.
4. The ultra-deep foundation pit permanent bonding diaphragm wall leakage repairing method according to claim 1, wherein the sealing cement comprises quick-setting cement and sealing glue.
5. The ultra-deep foundation pit permanent temporary joint diaphragm wall leakage repairing method according to claim 1, wherein when the modified epoxy slurry is poured, a plurality of grouting nozzles are poured one by one from one end of the V-shaped groove to the other end of the V-shaped groove, and each grouting is based on the slurry leakage of the adjacent grouting nozzles.
6. The ultra-deep foundation pit permanent temporary joint diaphragm wall leakage repairing method according to claim 5, wherein the grouting pressure is 0.2 Mpa-0.4 Mpa when each grouting nozzle is grouted, and the grouting pressure is gradually increased.
7. The ultra-deep foundation pit permanent temporary joint diaphragm wall leakage repairing method according to claim 6, wherein in the grouting process, when the grouting rate is less than 0.1L/min, grouting is stopped after 1-2min of grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310618209.3A CN116770910A (en) | 2023-05-29 | 2023-05-29 | Ultra-deep foundation pit permanent-facing combined underground continuous wall leakage repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310618209.3A CN116770910A (en) | 2023-05-29 | 2023-05-29 | Ultra-deep foundation pit permanent-facing combined underground continuous wall leakage repairing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116770910A true CN116770910A (en) | 2023-09-19 |
Family
ID=87987042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310618209.3A Pending CN116770910A (en) | 2023-05-29 | 2023-05-29 | Ultra-deep foundation pit permanent-facing combined underground continuous wall leakage repairing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116770910A (en) |
-
2023
- 2023-05-29 CN CN202310618209.3A patent/CN116770910A/en active Pending
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