CN113356887B - Single-layer well wall with grouting water-stop connecting piece and construction method thereof - Google Patents
Single-layer well wall with grouting water-stop connecting piece and construction method thereof Download PDFInfo
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- CN113356887B CN113356887B CN202110779828.1A CN202110779828A CN113356887B CN 113356887 B CN113356887 B CN 113356887B CN 202110779828 A CN202110779828 A CN 202110779828A CN 113356887 B CN113356887 B CN 113356887B
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- 238000010276 construction Methods 0.000 title claims abstract description 77
- 239000002356 single layer Substances 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000010410 layer Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000007569 slipcasting Methods 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims description 33
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 12
- 230000008014 freezing Effects 0.000 claims description 11
- 238000007710 freezing Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 6
- 238000010257 thawing Methods 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract 1
- 239000011440 grout Substances 0.000 description 11
- 238000005755 formation reaction Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 239000004567 concrete Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention belongs to the technical field of mine construction engineering, and particularly relates to a single-layer well wall with grouting water-stop connectors and a construction method thereof. Including upper segment wall of a well and hypomere wall of a well, be provided with the construction joint between upper segment wall of a well and the hypomere wall of a well, in construction joint department, upper segment wall of a well is connected through slip casting stagnant water connecting piece with hypomere wall of a well, slip casting stagnant water connecting piece includes the flexible pipe, the flexible pipe is closed annular and inlays and establish between upper segment wall of a well and hypomere wall of a well, both ends all fixedly connected with steel sheet limit about the flexible pipe, the steel sheet limit buries respectively in upper segment wall of a well and hypomere wall of a well, the construction joint towards being close to wellbore outer wall one side is provided with out the thick liquid hole on the flexible pipe, still be provided with the slip casting pipe on the flexible pipe, the slip casting mouth is left at the wellbore inner wall to the slip casting pipe. The invention has the advantages of convenient construction of the well wall, good overall water sealing performance, and the required well wall thickness is obviously smaller than that of the existing double-layer composite well wall under the same condition, and can obviously save the cost for the well shaft in the deep water-rich stratum.
Description
Technical Field
The invention belongs to the technical field of mine construction engineering, and particularly relates to a single-layer well wall with grouting water-stop connectors and a construction method thereof.
Background
The well bore in the water-rich stratum in China is mostly excavated by adopting a manual freezing method, and the main stream of supporting structures are double-layer reinforced concrete composite well walls with plastic interlayers, namely double-layer composite well walls.
The double-layer composite well wall consists of an inner well wall, an outer well wall and a plastic plate interlayer between the walls, and foam plates are arranged between the outer well wall and the soil layer for a well bore in the soil layer. The inner and outer layers of well walls are made of concrete, and steel bars are arranged if necessary. The outer layer well wall is cast from top to bottom in a segmented way, and construction joints exist between adjacent segments of well walls. The inner layer well wall is poured continuously from bottom to top, no construction joint exists, and the integrity is good. After the well wall construction is completed, grouting is carried out on the gap between the inner well wall and the outer well wall by utilizing a grouting pipe which is pre-buried or directly drilled on the inner wall, and the slurry material is common cement-based slurry, such as cement slurry or cement water glass slurry.
The outer layer well wall has the main functions of resisting the formation pressure and the construction load in the construction period, and the outer layer well wall and the inner layer well wall jointly resist the formation pressure in the service period. Because more construction joints exist, the outer layer well wall cannot resist the underground water pressure. The inner layer well wall has the main function of resisting the pressure of underground water in the service period, and the inner layer well wall and the outer layer well wall jointly resist the pressure of stratum. The function of the plastic plate interlayer is to reduce the restraint function of the outer layer well wall to the inner layer well wall and alleviate the temperature cracking problem of the inner layer well wall. The foam board has the functions of pressure relief and heat preservation, and provides favorable conditions for the strength increase of the outer-layer well wall concrete. The grouting is mainly used for filling gaps between inner and outer layers of well walls, and can also be used for filling water seepage channels possibly existing in the inner layer of well walls, the outer layer of well walls and the stratum near the well walls so as to improve the overall water sealing performance of the well walls.
Due to the existence of the plastic plates, the inner and outer layers of the well walls are completely separated all the time before and after grouting, and a clear water storage space exists between the walls. During the use of the shaft, the underground water enters between the inner wall and the outer wall through the water seepage channel on the outer wall, so that the inner wall of the shaft completely bears the underground water pressure between the walls. In the long term, the pressure of water between the inner wall and the outer wall is consistent with the underground water pressure of the stratum with the corresponding depth, so that the hydraulic load value of the inner wall of the well is equal to the hydrostatic pressure with the calculated depth during design. With the increase of the depth of the shaft, the design thickness of the inner-layer well wall and the strength grade of the concrete are increased in a nonlinear manner. The increase of the thickness of the well wall not only causes the construction cost of the well shaft to rise rapidly, but also causes the difficulty of preventing and controlling the cracking of the well wall to be multiplied due to the increase of the concrete casting volume, thereby ensuring the water sealing performance of the well wall to be heavy. Therefore, for frozen wellbores in deep water-rich formations, how to reduce the wall thickness while meeting the functional requirements of use is an important issue faced by engineering technicians.
Disclosure of Invention
In view of the above, the invention provides a single-layer well wall with grouting water-stop connecting pieces and a construction method thereof, so as to solve the problems in the prior art, and the invention provides the following specific technical scheme:
the utility model provides a take slip casting stagnant water connecting piece's individual layer wall of a well, includes upper segment wall of a well and hypomere wall of a well, upper segment wall of a well with be provided with the construction joint between the hypomere wall of a well the construction joint department, upper segment wall of a well with the hypomere wall of a well passes through slip casting stagnant water connecting piece to be connected, slip casting stagnant water connecting piece includes the flexible pipe, the flexible pipe is closed annular and inlays and establishes between upper segment wall of a well and hypomere wall of a well, both ends all fixedly connected with steel sheet limit about the flexible pipe, the steel sheet limit buries respectively in upper segment wall of a well and hypomere wall of a well, be provided with the play slurry hole on the flexible pipe, the play slurry hole sets up towards the construction joint that is close to pit outer wall one side, still be provided with the slip casting pipe on the flexible pipe, the slip casting pipe sets up and runs through inside wall of a well and leaves the slip casting mouth near the pit wall on the flexible pipe.
Further, the flexible pipe is made of rubber.
Further, the steel plate edge is a curved steel plate edge consistent with the curvature of the well wall.
Furthermore, the grouting pipes are a plurality of and are uniformly arranged on the flexible pipe, and grouting pipe standard joints are arranged at grouting openings of the grouting pipes.
Further, the number of the grout outlet holes is several, and the grout outlet holes are uniformly arranged on the flexible pipe, and the grout outlet holes are provided with cement or adhesive tape for temporary plugging.
A construction method of a single-layer well wall with grouting water-stop connecting pieces comprises the following steps:
s1, tunneling the height of a first construction section, falling and leveling the template cutting edge;
s2, conveying the grouting water-stop connecting piece underground, fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge to pass downwards, so that the steel plate edge can be poured into a lower section well wall of a first construction section, fixing a grouting pipe on the inner side of the well wall along the template cutting edge, reserving a certain length, protecting a grouting pipe standard joint, and ensuring convenience in finding out after demolding;
s3, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring an upper section well wall of the first construction section;
s4, tunneling downwards to the height of the second construction section, dropping the template blade foot to the transition part between the first construction section and the second construction section, and leveling;
s5, conveying the grouting water-stop connecting piece underground, fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge to pass downwards, so that the steel plate edge can be poured into an upper section well wall of a second construction section, fixing a grouting pipe on the inner side of the well wall along the template cutting edge, reserving a certain length, protecting a grouting pipe standard joint, and ensuring convenience in finding out after demolding;
s6, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring a lower section well wall of the first construction section;
s7, falling the template cutting edge to the middle position of the second construction section and leveling;
s8, conveying the grouting water-stop connecting piece underground, fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge to pass downwards, so that the steel plate edge can be poured into a lower section well wall of a second construction section, fixing a grouting pipe on the inner side of the well wall along the template cutting edge, reserving a certain length, protecting a grouting pipe standard joint, and ensuring convenience in finding out after demolding;
s9, binding reinforcing steel bars, dropping the template and adjusting to a proper position, and pouring an upper section well wall of the second construction section;
s10, repeating the steps S4 to S9;
s11, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring a lower section well wall of the last construction section;
s12, grouting materials are injected into the flexible pipe of the grouting water-stop connecting piece at the grouting time after the well wall is constructed to the designed depth.
Further, in step S12, the grouting time is that the formation frozen area exists in the near-well wall stratum with the depth corresponding to the construction joint, and the frozen area is still complete, that is, the formation frozen area exists and the formation frozen area does not have a local complete melting area, and the near-well wall stratum with the depth corresponding to the construction joint is sequentially the formation frozen area, the formation frozen area and the formation unfrozen area from near to far.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the grouting water-stop connecting piece is arranged at the construction joint between the upper section well wall and the lower section well wall, the construction joint can be plugged only by grouting in the grouting water-stop connecting piece, the well wall is convenient to construct, the overall water-sealing performance is good, the required well wall thickness is obviously smaller than that of the existing double-layer composite well wall under the same condition, and the construction cost can be obviously saved for a well shaft in a deep water-rich stratum.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic view of a grouting water-stop connector according to the invention.
FIG. 3 is a schematic diagram of an embodiment of the present invention.
The upper section well wall 1, the lower section well wall 2, the construction joint 3, the grouting water-stop connecting piece 4, the steel plate edge 41, the flexible pipe 42, the slurry outlet 43, the grouting pipe 44, the stratum thawing zone 5, the stratum freezing zone 6 and the stratum unfrozen zone 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The utility model provides a take slip casting stagnant water connecting piece's individual layer wall of a well, includes upper segment wall of a well 1 and hypomere wall of a well 2, upper segment wall of a well 1 with be provided with construction joint 3 between hypomere wall of a well 2 construction joint 3 department, upper segment wall of a well 1 with hypomere wall of a well 2 passes through slip casting stagnant water connecting piece 4 and is connected, slip casting stagnant water connecting piece 4 includes flexible pipe 42, flexible pipe 42 is closed annular and inlays and establishes between upper segment wall of a well 1 and hypomere wall of a well 2, the equal fixedly connected with steel sheet limit 41 in both ends about flexible pipe 42, steel sheet limit 41 buries respectively in upper segment wall of a well 1 and hypomere wall of a well 2, be provided with grout outlet 43 on the flexible pipe 42, grout outlet 43 sets up towards construction joint 3 that is close to wellbore outer wall one side, still be provided with grouting pipe 44 on the flexible pipe 42, grouting pipe 44 sets up on one side that is close to wellbore inner wall and runs through the inboard wall of a well.
The flexible pipe 42 in this embodiment is made of rubber, so that the flexible pipe 42 can expand outwards under the action of grouting internal pressure, thereby preventing slurry from flowing into the well along the construction joint 3; the steel plate edge 41 in the embodiment adopts a common thin steel plate, and the steel plate edge 41 is arranged to be a curved steel plate edge consistent with the curvature of the well wall, so that the stress is more uniform, and the connection with the well wall is more reliable.
In order to make grouting into the flexible pipe 42 more uniform, the grouting pipes 44 in this embodiment are provided in a plurality of numbers and are uniformly arranged on the flexible pipe 42, and grouting pipe standard joints are further provided at grouting openings of the grouting pipes 44 located at the inner side of the well wall so as to be connected with a grouting machine.
In this embodiment, the number of grout outlet holes 43 is several, and the grout outlet holes 43 are uniformly formed in the flexible pipe 42, so as to prevent the concrete from blocking the grout outlet holes 43 in the casting process of the well wall, and the grout outlet holes 43 can be temporarily blocked by using cement or adhesive tape, when grouting, the temporary blocking fails under the action of grouting pressure, and the grout can smoothly flow out from the grout outlet holes 43.
A construction method of a single-layer well wall with grouting water-stop connecting pieces 4 comprises the following steps:
s1, tunneling the height of a first construction section, falling and leveling the template cutting edge;
s2, conveying the grouting water-stop connecting piece 4 underground and fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable a steel plate edge 41 to pass downwards, so that the steel plate edge 41 can be poured into a lower section well wall 2 of a first construction section, fixing a grouting pipe 44 on the inner side of the well wall along the template cutting edge, reserving a certain length and protecting a grouting pipe standard joint, and ensuring that the grouting pipe standard joint is conveniently found out after demolding;
s3, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring an upper section well wall 1 of the first construction section;
s4, tunneling downwards to the height of the second construction section, dropping the template blade foot to the transition part between the first construction section and the second construction section, and leveling;
s5, conveying the grouting water-stop connecting piece 4 underground and fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge 41 to pass downwards, so that the steel plate edge 41 can be poured into the upper section well wall 1 of the second construction section, fixing the grouting pipe 44 on the inner side of the well wall along the template cutting edge, reserving a certain length and protecting a grouting pipe standard joint, and ensuring that the grouting pipe standard joint is conveniently found out after demolding;
s6, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring a lower section well wall 2 of the first construction section;
s7, falling the template cutting edge to the middle position of the second construction section and leveling;
s8, conveying the grouting water-stop connecting piece 4 underground and fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable a steel plate edge 41 to pass downwards, so that the steel plate edge 41 can be poured into a lower section well wall 2 of a second construction section, fixing a grouting pipe 44 on the inner side of the well wall along the template cutting edge, reserving a certain length and protecting a grouting pipe standard joint, and ensuring that the grouting pipe standard joint is conveniently found out after demolding;
s9, binding reinforcing steel bars, dropping the template and adjusting to a proper position, and pouring an upper section well wall 1 of a second construction section;
s10, repeating the steps S4 to S9;
s11, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring a lower section well wall 2 of the last construction section;
s12, grouting materials are injected into the flexible pipe 42 of the grouting water-stop connecting piece 4 at the grouting time after the well wall is constructed to the designed depth.
The grouting material in the step S12 is a micro-expansion material, the volume of the grouting material is not contracted or has micro-expansion after solidification, the filled channel is not changed into a water guide channel again after solidification, the grouting time in the step S12 is that a near-well wall stratum with the corresponding depth of the construction joint 3 has a freezing zone and the freezing zone is still complete, namely, the stratum freezing zone 5 exists and the stratum freezing zone 6 does not have a local complete melting zone, and the near-well wall stratum with the corresponding depth of the construction joint 3 sequentially comprises the stratum freezing zone 5, the stratum freezing zone 6 and the stratum unfreezing zone 7 from near to far.
The foregoing embodiments are merely illustrative of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but various modifications and improvements made by those skilled in the art to which the present invention pertains will be made without departing from the spirit of the present invention, and it is intended to fall within the scope of the present invention as defined in the appended claims.
Claims (7)
1. The utility model provides a take slip casting stagnant water connecting piece's individual layer wall of a well, its characterized in that, including upper segment wall of a well and hypomere wall of a well, upper segment wall of a well with be provided with the construction joint between the hypomere wall of a well the construction joint department, upper segment wall of a well with the hypomere wall of a well passes through slip casting stagnant water connecting piece to be connected, slip casting stagnant water connecting piece includes the flexible pipe, the flexible pipe is closed annular and inlays and establishes between upper segment wall of a well and hypomere wall of a well, both ends all fixedly connected with steel sheet limit about the flexible pipe, the steel sheet limit buries respectively in upper segment wall of a well and hypomere wall of a well, be provided with the apopore on the flexible pipe, the apopore sets up towards the construction joint that is close to pit shaft outer wall one side, still be provided with the slip casting pipe on the flexible pipe, the slip casting pipe sets up and runs through inside wall of a well.
2. The single-layer well wall with grouting water-stop connecting piece as claimed in claim 1, wherein the flexible pipe is made of rubber.
3. The single-layer well wall with grouting water-stop connecting piece according to claim 1, wherein the steel plate edge is a curved steel plate edge consistent with the curvature of the well wall.
4. The single-layer well wall with grouting water-stop connecting pieces according to claim 1, wherein a plurality of grouting pipes are uniformly arranged on the flexible pipe, and grouting pipe standard joints are arranged at grouting openings of the grouting pipes.
5. The single-layer well wall with grouting water-stop connecting pieces according to claim 1, wherein the number of the grouting holes is several, the grouting holes are uniformly formed in the flexible pipe, and cement or adhesive tape for temporary plugging is arranged on the grouting holes.
6. A method of constructing a single layer well wall with a grouting water stop connector as claimed in any one of claims 1 to 5, comprising the steps of:
s1, tunneling the height of a first construction section, falling and leveling the template cutting edge;
s2, conveying the grouting water-stop connecting piece underground, fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge to pass downwards, so that the steel plate edge can be poured into a lower section well wall of a first construction section, fixing a grouting pipe on the inner side of the well wall along the template cutting edge, reserving a certain length, protecting a grouting pipe standard joint, and ensuring convenience in finding out after demolding;
s3, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring an upper section well wall of the first construction section;
s4, tunneling downwards to the height of the second construction section, dropping the template blade foot to the transition part between the first construction section and the second construction section, and leveling;
s5, conveying the grouting water-stop connecting piece underground, fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge to pass downwards, so that the steel plate edge can be poured into an upper section well wall of a second construction section, fixing a grouting pipe on the inner side of the well wall along the template cutting edge, reserving a certain length, protecting a grouting pipe standard joint, and ensuring convenience in finding out after demolding;
s6, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring a lower section well wall of the first construction section;
s7, falling the template cutting edge to the middle position of the second construction section and leveling;
s8, conveying the grouting water-stop connecting piece underground, fixing the grouting water-stop connecting piece on a template cutting edge, reserving a channel on the template cutting edge to enable the steel plate edge to pass downwards, so that the steel plate edge can be poured into a lower section well wall of a second construction section, fixing a grouting pipe on the inner side of the well wall along the template cutting edge, reserving a certain length, protecting a grouting pipe standard joint, and ensuring convenience in finding out after demolding;
s9, binding reinforcing steel bars, dropping the template and adjusting to a proper position, and pouring an upper section well wall of the second construction section;
s10, repeating the steps S4 to S9;
s11, binding reinforcing steel bars, dropping a template and adjusting to a proper position, and pouring a lower section well wall of the last construction section;
s12, grouting materials are injected into the flexible pipe of the grouting water-stop connecting piece at the grouting time after the well wall is constructed to the designed depth.
7. The construction method of a single-layer well wall with a grouting water-stop connecting piece according to claim 6, wherein the grouting time in the step S12 is that a formation defrosting zone exists in a near-well wall stratum with a depth corresponding to a construction joint position and a freezing zone is still complete, namely, the formation defrosting zone exists and the formation freezing zone does not have a local complete melting zone, and the near-well wall stratum with the depth corresponding to the construction joint position is sequentially a formation defrosting zone, a formation freezing zone and a formation unfreezing zone from near to far.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779828.1A CN113356887B (en) | 2021-07-09 | 2021-07-09 | Single-layer well wall with grouting water-stop connecting piece and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110779828.1A CN113356887B (en) | 2021-07-09 | 2021-07-09 | Single-layer well wall with grouting water-stop connecting piece and construction method thereof |
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| CN113356887A CN113356887A (en) | 2021-09-07 |
| CN113356887B true CN113356887B (en) | 2023-12-22 |
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| CN114607386B (en) * | 2022-04-18 | 2023-05-05 | 中国矿业大学 | Single-layer well wall with stubble-connecting water-stopping structure and grouting system and construction method thereof |
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