CN111173038B - Construction process of vertical shaft - Google Patents
Construction process of vertical shaft Download PDFInfo
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- CN111173038B CN111173038B CN202010026123.8A CN202010026123A CN111173038B CN 111173038 B CN111173038 B CN 111173038B CN 202010026123 A CN202010026123 A CN 202010026123A CN 111173038 B CN111173038 B CN 111173038B
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- 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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
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- 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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
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Abstract
The invention relates to the technical field of foundation pit engineering construction, in particular to a construction process of a vertical shaft, which comprises the following steps: s1: constructing a wellhead, and installing a retaining wall steel cylinder; s2: excavating a shallow layer, namely excavating soil bodies in and below the retaining wall steel cylinder to form a shallow foundation pit; s3: carrying out deep excavation, injecting water into the shallow foundation pit, and sucking mud while excavating till the design depth; s4: constructing at the bottom of the well, and performing waterproof treatment at the bottom of the well; s5: wall protection construction, namely hoisting the prefabricated steel casing to the bottom of the vertical shaft, and connecting the prefabricated steel casing to be high section by section; s6: and (4) lining construction, namely pouring a concrete lining wall between the prefabricated steel casing and the well wall. The invention has the advantages of improving the bearing capacity and stability of the well wall, reducing the possibility of well collapse and ensuring the construction safety.
Description
Technical Field
The invention relates to the technical field of foundation pit engineering construction, in particular to a construction process of a vertical shaft.
Background
The vertical shaft is a channel for conveying underground silt or silt when excavating or cleaning a hidden channel of the karez, and is also an air supply ventilation opening. The depth of the well is different from the height of the underground water level due to the terrain, and generally, the deeper the well is, the deepest the well can reach more than 90 meters. The distance between the shafts varies with the length of the karez, and there are usually one shaft every 20-70 m.
The vertical shaft with the deep construction depth often faces some problems, such as the influence of underground water on the vertical shaft excavation and the influence on the structural strength of the vertical shaft; furthermore, with the increase of the depth of the shaft, the buoyancy of the underground water at the bottom of the shaft is increased continuously, and the stability of the shaft is affected to a certain extent. In addition, the drainage excavation construction of the vertical shaft has great influence on the surrounding environment, and particularly for the drainage construction of the ultra-deep large-diameter vertical shaft, the precipitation is large, the influence on the surrounding environment is more prominent, and the construction risk is large.
Disclosure of Invention
The invention aims to provide a construction process of a vertical shaft, which has the advantages of improving the pressure bearing capacity and stability of a shaft wall, reducing the possibility of shaft collapse and ensuring the construction safety.
The technical purpose of the invention is realized by the following technical scheme: the construction process of the vertical shaft comprises the following steps:
s1: constructing a wellhead, and installing a retaining wall steel cylinder;
s2: excavating a shallow layer, namely excavating soil bodies in and below the retaining wall steel cylinder to form a shallow foundation pit;
s3: carrying out deep excavation, injecting water into the shallow foundation pit, and sucking mud while excavating till the design depth;
s4: constructing at the bottom of the well, and performing waterproof treatment at the bottom of the well;
s5: wall protection construction, namely hoisting the prefabricated steel casing to the bottom of the vertical shaft, and connecting the prefabricated steel casing to be high section by section;
s6: and (4) lining construction, namely pouring a concrete lining wall between the prefabricated steel casing and the well wall.
By adopting the technical scheme, in the vertical shaft construction process, the structural strength at the position of the shaft opening is improved by adopting the retaining wall steel cylinder, collapse from the shaft opening during subsequent construction is avoided, and meanwhile, the initial section of shallow excavation is paved, so that the reliability during excavation is improved; the deep excavation is carried out by adopting a water injection mode, so that the water pressure can offset partial pressure of a soil body on a well wall, and the construction safety is improved; the prefabricated steel casing is adopted to enhance the strength of the well wall and improve the pressure resistance of the well wall; through pouring the concrete interior lining wall between prefabricated steel casing and the wall of a well, make inseparable combination between the three be in the same place, form unified atress wholly, further improve the bearing capacity and the stability of the wall of a well, reduced the possibility that the well collapses, ensured construction safety.
The invention in a preferred example may be further arranged to: the step S1 further includes the steps of:
a1: vertically pressing a plurality of steel pipes into soil in a vertical shaft construction area through hydraulic equipment, then pulling out the steel pipes, and loosening the soil layer by repeating the process for a plurality of times;
a2: spraying water to the surface of the shaft construction area, so that the water is quickly infiltrated into the soil layer under the treatment of the step A1;
a3: hoisting the retaining wall steel cylinder in place, and slowly pressing the retaining wall steel cylinder into the ground through hydraulic equipment until the top end of the retaining wall steel cylinder is 20cm higher than the ground;
a4: and installing ring beams at the outer side wall of the retaining wall steel cylinder higher than the ground to fix the retaining wall steel cylinder and the ground together.
Through adopting above-mentioned technical scheme, conveniently impress the underground with the dado steel cylinder, reduced the construction degree of difficulty.
The invention in a preferred example may be further arranged to: the length of the steel pipe is 4-6 m, and the diameter of the steel pipe is 5-10 cm.
By adopting the technical scheme, the adaptability can be adjusted according to the requirement.
The invention in a preferred example may be further arranged to: in step S2, as the excavation depth increases, fine aggregate concrete is sprayed on the well wall as a protective layer.
By adopting the technical scheme, the well wall reinforcing device is used for reinforcing the well wall, resisting the pressure applied by soil to the well wall and improving the construction safety.
The invention in a preferred example may be further arranged to: the step S3 further includes the steps of:
sealing the bottom, namely pumping concrete into deep soil through a high-pressure pipe to mix cement slurry with soil to form a continuously lapped base reinforcing layer;
injecting water, namely injecting water into the vertical shaft, wherein the water surface is 1m-1.5m lower than the wellhead;
and (4) excavating downwards by adopting a drilling machine, pumping the slurry-water mixture to the ground along the pipeline, and treating the slurry by using a slurry treatment system until the substrate reinforcing layer leaks out, so that deep excavation is finished.
By adopting the technical scheme, the shaft bottom is blocked, so that underground water can be prevented from continuously flowing into the shaft to damage the well wall, and the well wall is indirectly reinforced.
The invention in a preferred example may be further arranged to: the step S4 further includes the steps of:
pumping water in the shaft, and spraying fine aggregate concrete on the wall of the shaft with the water level of 2-3 meters as a protective layer when the water level drops by 2-3 meters in the process of pumping water;
spraying fine aggregate concrete on the surface of the substrate reinforcing layer and leveling to form a bonding layer;
paving a waterproof coiled material on the surface of the bonding layer;
and spraying fine stone concrete on the surface of the waterproof roll and leveling to form a stable layer.
By adopting the technical scheme, the fine aggregate concrete is sprayed on the well wall to support the well wall, so that the pressure bearing capacity of the well wall is improved; the laying of the waterproof coiled material mainly plays a role in water resistance; by means of the floating mode, the flatness of the shaft bottom is guaranteed, and the prefabricated steel casing is prevented from inclining when being installed.
The invention in a preferred example may be further arranged to: the step S5 further includes the steps of:
hoisting, namely hoisting the prefabricated steel casing to a position 1m away from the bottom of the well;
adjusting, horizontally moving the prefabricated steel casing, and measuring the distance from the periphery of the prefabricated steel casing to the well wall through a measuring instrument to keep the prefabricated steel casing and the well wall the same;
fixing, namely taking three guide rods, correspondingly inserting the three guide rods into a guide ring of the prefabricated steel casing, abutting one end of each guide rod, which is provided with a threaded hole, against a stabilizing layer, spraying concrete to fix the guide rods, and scraping the surface of the concrete after spraying;
lengthening, namely after concrete is solidified, lowering the prefabricated steel casing to the bottom of the vertical shaft, then taking down a section of guide rod, connecting the guide rod to a first section of guide rod in a threaded manner, and repeating the operation until the total height of the guide rod is 20-50 cm higher than the wellhead;
and (4) connecting the prefabricated steel casing sections by sections, and hoisting the prefabricated steel casing sections one by one to ensure that the slot of the next prefabricated steel casing section is inserted into the inserting plate of the previous prefabricated steel casing section.
Through adopting above-mentioned technical scheme, earlier through hoist and mount prefabricated steel pile casing find the position of accurate guide bar, then the rethread guide bar carries on spacingly and direction to prefabricated steel pile casing, can interact between the two, can guarantee simultaneously that the wall thickness of the concrete that the later stage was pour is the same, because the atress is uneven when avoiding the extrusion force and breaking occur.
The invention in a preferred example may be further arranged to: in step S5, when the total height of the prefabricated steel casing is higher than the wellhead, the guide rod at the top is removed.
Through adopting above-mentioned technical scheme, prevent that the guide bar that exceeds the well head from causing the influence to subsequent construction.
The invention in a preferred example may be further arranged to: the prefabricated steel protection cylinder is cylindrical, the interior of the prefabricated steel protection cylinder is hollow, two ends of the prefabricated steel protection cylinder are open, one end of the prefabricated steel protection cylinder is provided with a slot, and the other end of the prefabricated steel protection cylinder is integrally connected with a plug board matched with the slot; the outer wall of the prefabricated steel casing is fixedly connected with three guide rings, and the three guide rings are circumferentially distributed by taking the axis of the prefabricated steel casing as the center.
Through adopting above-mentioned technical scheme, connect when high, only need to hoist next section of prefabricated steel protects a section of thick bamboo, then down put along the guide bar can, need not worry prefabricated steel section of thick bamboo skew.
The invention in a preferred example may be further arranged to: one end of the guide rod is provided with a threaded hole, and one end of the guide rod, which is opposite to the threaded hole, is fixedly connected with a screw rod matched with the threaded hole.
Through adopting above-mentioned technical scheme, the guide bar not only can lead to and fix a position prefabricated steel protects a section of thick bamboo, guarantees the slot accuracy with the cooperation of pegging graft of picture peg, can also avoid prefabricated steel to protect a section of thick bamboo and transfer the in-process because the back and forth movement and cause the destruction to the wall of a well.
In conclusion, the beneficial technical effects of the invention are as follows:
1. in the vertical shaft construction process, the structural strength at the position of the shaft mouth is improved by adopting the retaining wall steel cylinder, so that collapse from the shaft mouth during subsequent construction is avoided, and meanwhile, the initial section of shallow excavation is paved, so that the reliability during excavation is improved; the deep excavation is carried out by adopting a water injection mode, so that the water pressure can offset partial pressure of a soil body on a well wall, and the construction safety is improved; the prefabricated steel casing is adopted to enhance the strength of the well wall and improve the pressure resistance of the well wall; the concrete lining wall is poured between the prefabricated steel casing and the well wall, so that the prefabricated steel casing, the well wall and the well wall are tightly combined together to form a uniform stressed whole, the bearing capacity and the stability of the well wall are further improved, the possibility of well collapse is reduced, and the construction safety is guaranteed;
2. the wall of the well is reinforced by spraying the fine aggregate concrete on the wall of the well, so that the pressure applied by soil to the wall of the well is resisted, and the construction safety is improved;
3. the position of the guide rod is accurately found through hoisting the prefabricated steel pile casing, then the prefabricated steel pile casing is limited and guided through the guide rod, interaction can be achieved between the prefabricated steel pile casing and the prefabricated steel pile casing, the wall thickness of concrete poured in the later stage is guaranteed to be the same, and fracture is avoided due to uneven stress when extrusion force is applied.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic diagram showing the installation of a retaining wall steel cylinder;
FIG. 3 is a schematic diagram showing a shallow excavation;
FIG. 4 is a schematic view showing water injection before deep excavation;
FIG. 5 is a schematic view showing a deep excavation;
FIG. 6 is a schematic view showing that the construction is completed;
FIG. 7 is a cross-sectional view embodying the structure of a prefabricated steel casing;
FIG. 8 is a top view showing the overall structure of the prefabricated steel casing;
fig. 9 is a schematic view showing the structure of the guide bar.
Reference numeral, 1, a dado steel cylinder; 11. a ring beam; 2. a shaft; 21. a protective layer; 22. shallow foundation pits; 23. a base reinforcement layer; 24. an adhesive layer; 25. waterproof coiled materials; 26. a stabilizing layer; 3. prefabricating a steel protective cylinder; 31. a slot; 32. inserting plates; 33. a guide ring; 4. a guide bar; 41. a threaded hole; 42. a screw; 5. concrete inside lining wall.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the construction process of a shaft 2 disclosed by the invention comprises the following steps: s1: constructing a wellhead; s2: excavating a shallow layer; s3: deep excavation; s4: constructing the bottom of the well; s5: constructing a protective wall; s6: and (5) lining construction.
Referring to fig. 2, in step S1, the retaining wall steel cylinder 1 is mainly installed to improve the structural strength at the wellhead and prevent collapse from the wellhead during subsequent construction. The diameter of the retaining wall steel cylinder 1 is designed according to construction requirements, the height of the retaining wall steel cylinder 1 is selected according to different terrains, generally 4m-6m, and the other purpose of the design is to pave the initial section of shallow excavation and improve the reliability of excavation.
The concrete operation steps of the installation of the retaining wall steel cylinder 1 are as follows:
a1: preparing a plurality of steel pipes with the length of 6-8 meters and the diameter of 5-10cm, vertically driving the prepared steel pipes into soil where the construction area of the vertical shaft 2 is located through hydraulic vibration, pulling out the steel pipes, and loosening the soil layer repeatedly;
a2: spraying water on the surface of the construction area of the vertical shaft 2 through water spraying equipment, and after the soil loosening treatment of the step A2, rapidly permeating the water into the ground to enable a firm soil layer to be soft;
a3: hoisting the retaining wall steel cylinder 1 in place by a crane or other hoisting equipment, and slowly pressing the retaining wall steel cylinder 1 into the ground by hydraulic equipment until the top end of the retaining wall steel cylinder 1 is about 20cm higher than the ground;
a4: and a ring beam 11 is arranged at the outer side wall of the dado steel cylinder 1 higher than the ground, and the dado steel cylinder 1 and the ground are fixed together, and the dado steel cylinder can be particularly realized by adopting a reinforced concrete pouring mode.
Referring to fig. 3, in step S2, after the wellhead construction is completed, a shallow soil layer is excavated by using a plurality of excavators in combination with cranes, where the shallow soil layer is an area where no groundwater is present, the depth range of the shallow soil layer is generally 12m to 16m, and the numerical range needs to be adjusted appropriately according to the local groundwater level condition. During preliminary excavation, the retaining wall steel cylinder 1 can play a certain supporting role on the well wall, bear the pressure applied by soil bodies to the well, the pressure can be gradually increased along with the increase of the depth of the vertical shaft 2, and at the moment, workers spray fine aggregate concrete on the well wall through a pressure spray gun to serve as a protective layer 21 for reinforcing the well wall and improving the construction safety; when the excavation is carried out till water breakthrough (only water seepage and no gushing), the shallow excavation is finished and a shallow foundation pit 22 is formed. Because shallow excavation is dry excavation, water-soil separation treatment is not needed, so that construction is fast, and the construction period is shortened to a certain extent.
Referring to fig. 4, in step S3, the bottom of the well needs to be sealed before deep excavation, so as to prevent the ground water from continuously flowing into the shaft 2 to damage the wall of the well, thereby indirectly reinforcing the wall of the well. The method is realized by driving a high-pressure pipe of the high-pressure jet grouting pile into deep soil, spraying cement slurry into a soil layer through a high-pressure rotating nozzle to be mixed with soil, so as to form a continuous lapped base reinforcing layer 23, wherein the distance between the base reinforcing layer 23 and a well mouth is the well depth.
Referring to fig. 5, after the construction of the base reinforcing layer 23 is completed, water is injected into the vertical shaft 2 through equipment such as a water pump and a water pipe, the water surface is 1m-1.5m lower than the wellhead, partial pressure of soil on the well wall can be offset through a water injection mode, and the construction safety is improved. The underwater excavation construction can adopt a hydraulic reducing drilling machine or a punching and grabbing drilling machine. The specific adopted equipment can be adaptively selected according to local geological characteristics. When the hydraulic variable-diameter drilling machine is used for excavation, muddy water is pumped to the ground along a pipeline and then is treated by a mud treatment system, and the BE250 mud treatment system can BE selected as the mud treatment system. When the base reinforcing layer 23 is leaked out, the deep excavation is finished.
Referring to fig. 6, in step S4, the water in the shaft 2 is pumped out by a water pump, and when the water level drops by 2-3 meters, fine aggregate concrete is sprayed on the shaft wall of 2-3 meters to serve as a protective layer 21, the slump constant is controlled to be 160mm, and the protective layer is used for supporting the shaft wall and improving the pressure-bearing capacity of the shaft wall; when the water in the shaft 2 is pumped to be dry, the waterproof treatment is carried out at the bottom of the shaft, and the method comprises the following specific steps: firstly, spraying fine aggregate concrete on the surface of the substrate reinforcing layer 23 through a pressure spray gun and leveling to form a bonding layer 24; secondly, laying a waterproof roll 25 on the surface of the adhesive layer 24 to further play a role in water resistance; and thirdly, spraying fine aggregate concrete on the surface of the waterproof roll 25 through a pressure spray gun and leveling to form a stable layer 26.
Referring to fig. 7 and 8, in step S5, the prefabricated steel casing 3 is cylindrical, the interior of the prefabricated steel casing 3 is hollow, two ends of the prefabricated steel casing are open, one end of the prefabricated steel casing 3 is provided with a slot 31, the other end of the prefabricated steel casing is integrally connected with a plug board 32 matched with the slot 31, and the two vertically adjacent prefabricated steel casings 3 can be primarily fixed through the matching of the slot 31 and the plug board 32. Three guide rings 33 are fixedly connected to the outer wall of the prefabricated steel casing 3, and the three guide rings 33 are circumferentially distributed by taking the axis of the prefabricated steel casing 3 as the center.
Referring to fig. 8 and 9, according to the specification and size of the guide ring 33, a plurality of guide rods 4 matched with the guide ring 33 are prefabricated, a threaded hole 41 is formed in one end of each guide rod 4, a screw rod 42 is integrally connected to the other end of each guide rod 4, and the two adjacent guide rods 4 can be lengthened through the cooperation of the screw rod 42 and the threaded hole 41.
Referring to fig. 6, 7 and 9, during construction, the prefabricated steel casing 3 is hoisted and lowered to a position 1m away from the shaft bottom through hoisting equipment, hydraulic equipment and a traction device, the prefabricated steel casing 3 is horizontally moved and adjusted, the distance between the periphery of the prefabricated steel casing 3 and the wall of the well is measured through a measuring instrument to keep the prefabricated steel casing 3 the same, then three guide rods 4 are taken and correspondingly inserted into the guide rings 33, one ends of the guide rods 4 provided with threaded holes 41 are abutted to the stabilizing layer 26, then the guide rods 4 are fixed in a concrete spraying mode, the surface of the concrete is scraped flat after spraying, after the concrete is solidified, the first section of the prefabricated steel casing 3 is lowered to the bottom of the shaft 2, then the guide rods 4 are lengthened until the guide rods 4 are 20cm-50cm higher than the shaft opening, then the prefabricated steel casing 3 is hoisted section by section to realize the connection and hoisting, guide and location are protected a section of thick bamboo 3 through guide bar 4 to the prefabricated steel to guarantee that slot 31 can be accurate with picture peg 32 grafting cooperation, can also avoid prefabricated steel to protect a section of thick bamboo 3 to cause the destruction to the wall of a well owing to the swing back and forth at the in-process of transferring simultaneously, when prefabricated steel protects a section of thick bamboo 3 and is higher than the well head, demolish guide bar 4 at top.
In step S6, a concrete lining wall 5 that tightly bonds the prefabricated steel casing 3 and the well wall is poured between the prefabricated steel casing and the well wall through a concrete pouring device, so that the prefabricated steel casing and the well wall form a uniform stressed whole, and the strength of the well wall is improved.
In the construction process of the vertical shaft 2, the structural strength at the position of the shaft mouth is improved by adopting the retaining wall steel cylinder 1, collapse from the position of the shaft mouth during subsequent construction is avoided, and meanwhile, a pad is laid for the initial section of shallow excavation, so that the reliability during excavation is improved; the deep excavation is carried out by adopting a water injection mode, so that the water pressure can offset partial pressure of a soil body on a well wall, and the construction safety is improved; in the process of pumping out water, the well wall is supported by spraying fine aggregate concrete on the well wall, so that the pressure bearing capacity of the well wall is improved; the prefabricated steel casing 3 is adopted to enhance the strength of the well wall and improve the pressure resistance of the well wall; through pouring concrete interior lining wall 5 between prefabricated steel casing 3 and the wall of a well, make inseparable combination between the three be in the same place, form unified atress wholly, further improve the bearing capacity and the stability of the wall of a well, reduced the possibility that the well collapses, ensured construction safety.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The construction process of the vertical shaft is characterized by comprising the following steps:
s1: constructing a wellhead, and installing a retaining wall steel cylinder (1);
s2: excavating a shallow layer, namely excavating soil bodies in and below the retaining wall steel cylinder (1) to form a shallow foundation pit (22);
s3: carrying out deep excavation, namely injecting water into a shallow foundation pit (22), and sucking mud while excavating till the design depth;
s4: constructing at the bottom of the well, and performing waterproof treatment at the bottom of the well;
s5: and (2) performing dado construction, namely hoisting the prefabricated steel casing (3) to the bottom of the vertical shaft (2) and connecting the prefabricated steel casing to be high section by section, and specifically comprising the following steps:
hoisting, namely hoisting the prefabricated steel casing (3) and lowering the prefabricated steel casing to a position 1m away from the bottom of the well;
adjusting, horizontally moving the prefabricated steel protecting cylinder (3), and measuring the distance from the periphery of the prefabricated steel protecting cylinder (3) to the well wall through a measuring instrument to keep the same;
fixing, namely taking three guide rods (4), correspondingly inserting the three guide rods into a guide ring (33) of the prefabricated steel casing (3), abutting one end, provided with a threaded hole (41), of each guide rod (4) against a stabilizing layer (26), spraying concrete to fix the guide rods (4), and scraping the surface of the concrete after spraying;
lengthening, namely after concrete is solidified, lowering the prefabricated steel casing (3) to the bottom of the vertical shaft (2), then taking down a section of guide rod (4), connecting the guide rod to a first section of guide rod (4) in a threaded manner, and repeating the operation until the total height of the guide rod (4) is 20-50 cm higher than the wellhead;
connecting the prefabricated steel protecting cylinders (3) high, and hoisting the prefabricated steel protecting cylinders (3) section by section to ensure that the slot (31) of the next prefabricated steel protecting cylinder (3) is inserted into the inserting plate (32) of the previous prefabricated steel protecting cylinder (3);
s6: and (3) lining construction, namely pouring a concrete lining wall (5) between the prefabricated steel pile casing (3) and the well wall.
2. A construction process of a shaft according to claim 1, further comprising the step of:
a1: vertically pressing a plurality of steel pipes into soil in a construction area of the vertical shaft (2) through hydraulic equipment, then pulling out, and loosening the soil layer by repeating for a plurality of times;
a2: spraying water to the surface of the construction area of the shaft (2) so that the water is quickly infiltrated into the soil layer under the treatment of the step A1;
a3: hoisting the retaining wall steel cylinder (1) in place, and slowly pressing the retaining wall steel cylinder (1) into the ground through hydraulic equipment until the top end of the retaining wall steel cylinder (1) is 20cm higher than the ground;
a4: and a ring beam (11) is arranged on the outer side wall of the retaining wall steel cylinder (1) higher than the ground, and the retaining wall steel cylinder (1) is fixed with the ground.
3. A construction process of a shaft according to claim 2, characterized in that: the length of the steel pipe is 4-6 m, and the diameter of the steel pipe is 5-10 cm.
4. A construction process of a shaft according to claim 1, characterized in that: in step S2, fine aggregate concrete is sprayed on the wall of the borehole as the excavation depth increases to form a protective layer (21).
5. A construction process of a shaft according to claim 1, further comprising the step of:
bottom sealing, namely, pumping concrete into deep soil through a high-pressure pipe to mix cement slurry with soil to form a continuously lapped base reinforcing layer (23);
injecting water, namely injecting water into the vertical shaft (2), wherein the water surface is 1m-1.5m lower than the wellhead;
and (4) excavating downwards by using a drilling machine, pumping the slurry-water mixture to the ground along a pipeline, and treating the slurry-water mixture by using a slurry treatment system until the substrate reinforcing layer (23) leaks out, so that deep excavation is finished.
6. A construction process of a shaft according to claim 5, further comprising the step of:
pumping out water in the vertical shaft (2), and spraying fine stone concrete on the wall of the 2-3 m well as taking the fine stone concrete as a protective layer (21) when the water level drops by 2-3 m in the process of pumping water;
spraying fine aggregate concrete on the surface of the substrate reinforcing layer (23) and leveling to form a bonding layer (24);
laying a waterproof roll (25) on the surface of the adhesive layer (24);
and spraying fine stone concrete on the surface of the waterproof roll (25) and leveling to form a stable layer (26).
7. A construction process of a shaft according to claim 1, characterized in that: in step S5, when the total height of the prefabricated steel casing (3) is higher than the wellhead, the guide rod (4) at the top is removed.
8. A construction process of a shaft according to claim 1, characterized in that: the prefabricated steel protecting cylinder (3) is cylindrical, the interior of the prefabricated steel protecting cylinder is hollow, two ends of the prefabricated steel protecting cylinder are open, one end of the prefabricated steel protecting cylinder (3) is provided with a slot (31), and the other end of the prefabricated steel protecting cylinder is integrally connected with a plug board (32) matched with the slot (31); the outer wall of the prefabricated steel protective cylinder (3) is fixedly connected with three guide rings (33), and the three guide rings (33) are circumferentially distributed by taking the axis of the prefabricated steel protective cylinder (3) as the center.
9. A construction process of a shaft according to claim 1, characterized in that: one end of the guide rod (4) is provided with a threaded hole (41), and one end, opposite to the threaded hole (41), of the guide rod (4) is fixedly connected with a screw rod (42) matched with the threaded hole (41).
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| CN202010026123.8A CN111173038B (en) | 2020-01-10 | 2020-01-10 | Construction process of vertical shaft |
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| CN202010026123.8A CN111173038B (en) | 2020-01-10 | 2020-01-10 | Construction process of vertical shaft |
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| CN111945738A (en) * | 2020-07-21 | 2020-11-17 | 佛山市鸿博盾构物资有限公司 | Shaft construction method |
| CN113944467B (en) * | 2021-09-02 | 2024-04-09 | 成都大学 | Construction method for preventing collapse of shaft enclosure broken surrounding rock well wall |
| CN113944466A (en) * | 2021-09-02 | 2022-01-18 | 成都大学 | Reinforced structure of broken country rock wall of a well of highway tunnel shaft that grows up |
| CN114046150A (en) * | 2021-10-13 | 2022-02-15 | 北京中煤矿山工程有限公司 | Reconstructed well wall for closing or abandoning mine shaft and construction process thereof |
| CN114517515A (en) * | 2021-12-31 | 2022-05-20 | 中国能源建设集团广东省电力设计研究院有限公司 | Safe and efficient inspection well construction method |
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| CN101684669B (en) * | 2008-09-27 | 2011-06-08 | 吴纪东 | Submersed type inspection well construction method |
| CN104652436B (en) * | 2014-12-24 | 2017-06-27 | 福建工程学院 | Steel sleeve high pressure water injection is loosened the soil pile-pulling construction method |
| CN204552747U (en) * | 2015-04-21 | 2015-08-12 | 西安科技大学 | A kind of coal mine shaft lining shaft wall structure |
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| CN106480891B (en) * | 2016-11-30 | 2019-04-19 | 上海市机械施工集团有限公司 | A kind of shaft construction method |
| CN108222944A (en) * | 2018-02-28 | 2018-06-29 | 武汉理工大学 | A kind of improved drop shaft sinking driving shaft construction method |
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