CN116497856A - Construction method of prefabricated assembly shaft - Google Patents
Construction method of prefabricated assembly shaft Download PDFInfo
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- CN116497856A CN116497856A CN202310632403.7A CN202310632403A CN116497856A CN 116497856 A CN116497856 A CN 116497856A CN 202310632403 A CN202310632403 A CN 202310632403A CN 116497856 A CN116497856 A CN 116497856A
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- prefabricated
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- prefabricated well
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 42
- 239000002689 soil Substances 0.000 claims abstract description 15
- 239000002390 adhesive tape Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims description 36
- 239000002002 slurry Substances 0.000 claims description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 238000004873 anchoring Methods 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 9
- 238000005056 compaction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 210000001503 joint Anatomy 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to a construction method of a prefabricated vertical shaft, and belongs to the technical field of underground engineering construction. The construction method comprises the following steps: a. prefabricating a prefabricated well wall (1) in a factory; b. excavating earthwork in layers, sequentially assembling the first section of prefabricated well wall (1) into a ring shape, and installing a water stop adhesive tape (9) at a joint; c. penetrating an anchor rod (10) and hammering into a soil layer for grouting; d. and continuing to excavate downwards, assembling the second section of prefabricated well wall (1) into a ring shape, and connecting the upper layer of prefabricated well wall (1) and the lower layer of prefabricated well wall (1) into a whole. e. Penetrating an anchor rod (10) and hammering into a soil layer for grouting; f. the adjacent prefabricated well walls (1) are closely packed; g. repeating steps d to f; h. and (5) pouring construction of a bottom plate at the bottom of the well. The structure is constructed in layers, so that wet working procedures are simplified, the construction speed is high, and the construction cost is low. The problems that the cast-in-situ vertical shaft structure has more construction procedures, long construction period and large workload, the rigidity of the template is difficult to control, and the quality is difficult to ensure are solved.
Description
Technical Field
The invention relates to a construction method of a prefabricated vertical shaft, and belongs to the technical field of underground engineering construction.
Background
With the continuous acceleration of urban construction, available overground space is more and more intense, so that underground space with lower development degree and large reserve amount enters the field of vision of people, and currently, the development of underground space has become an important trend of urban development. Urban underground engineering includes underground parking garages, underground storage, working wells, vertical connecting channels of underground spaces such as working wells of tunnels, and the like. However, because the underground structure needs large earthwork excavation, soil taking and slope placing, the construction operation area is far larger than the occupied area of the building, which is difficult to realize in urban areas with limited construction sites.
The traditional underground cast-in-situ shaft structure has the advantages of multiple construction procedures, narrow underground space, limited working face, difficult construction of a formwork support system, low working efficiency, long construction period, difficult control of rigidity of the formwork, difficult guarantee of concrete pouring forming quality and large formwork dismantling engineering quantity.
Disclosure of Invention
The invention aims to solve the technical problems that the cast-in-situ vertical shaft structure has more construction procedures, long construction period, large workload, difficult control of rigidity of the template and difficult quality assurance.
The technical scheme adopted for solving the technical problems is as follows: a construction method of a prefabricated vertical shaft comprises the following steps:
a. designing the shape and the size of a prefabricated well wall according to the structural size of a vertical shaft, geological conditions where construction is located and surrounding environmental factors, and carrying out prefabrication in a factory and then transporting to a construction site;
b. setting out construction positioning, excavating earthwork in layers, and sequentially assembling the first section of prefabricated well wall into a ring shape after excavating to the depth of the first section of prefabricated well wall, wherein water stop adhesive tapes are arranged at the inner side and the outer side of the joint of the adjacent prefabricated well walls;
c. the anchor rod passes through a grouting anchoring hole on the prefabricated well wall, is hammered into a soil layer, cement slurry is injected, and concrete or cement slurry is pressed into the outer side of the prefabricated well wall for filling and compacting;
d. continuously excavating soil downwards, and sequentially assembling the second section of prefabricated well wall into a ring shape after the second section of prefabricated well wall is in depth, so that the upper layer of prefabricated well wall and the lower layer of prefabricated well wall are connected into a whole;
e. the anchor rod passes through a grouting anchoring hole on the prefabricated well wall of the second layer, is hammered into a soil layer, cement slurry is injected, and concrete or cement slurry is pressed into the outer side of the well wall for filling and compacting;
f. filling and compacting the cavities between each layer of adjacent prefabricated well walls and the cavities between the prefabricated well walls of the upper layer and the lower layer by micro-expansion cement paste;
g. d, repeating the steps d to f to construct downwards to the substrate, and finishing the installation of the shaft wall structure;
h. and (5) performing pouring construction on the bottom plate of the well bottom.
In the method, two ends of the prefabricated well wall in the step a are respectively provided with a longitudinal convex groove and a longitudinal groove, so that the left prefabricated well wall and the right prefabricated well wall are connected through the longitudinal convex grooves and the longitudinal grooves.
In the method, in the step a, an arc-shaped rotary circumferential groove is formed in the upper end face of the prefabricated well wall, annular reinforcing ribs are arranged in the circumferential groove, the intersection of the longitudinal connecting piece and the annular reinforcing ribs is fixedly connected, and water stop adhesive tapes are arranged on the inner side and the outer side of the adjacent joint of the well wall.
Furthermore, in the above method, a plurality of through longitudinal through holes are uniformly arranged on the upper and lower end surfaces of the prefabricated well wall in the step a at intervals, longitudinal connecting pieces penetrate into the longitudinal through holes, and the upper and lower prefabricated well walls are connected after cement slurry is poured.
Further, in the above method, an arc-shaped through hole is formed in the middle of the prefabricated well wall in the step a, and a metal corrugated pipe or a plastic corrugated pipe is pre-buried in the arc-shaped through hole.
In the method, the excavation diameter in the step b is larger than the structural size of the vertical shaft by 100-200 mm.
Further, in the method, the communicated pore canal of the longitudinal through hole and the arc-shaped through hole in the step f is filled with micro-expansion cement paste for compaction; and the middle cavities of the longitudinal convex grooves, the longitudinal grooves and the circumferential grooves are compacted by micro-expansion cement slurry filling.
In the method, after each layer of prefabricated well wall is installed, annular connecting ribs are arranged on the outer side of each layer of prefabricated well wall, and the annular connecting ribs are connected with anchor rods.
In the method, each layer of prefabricated well walls longitudinally are butted by staggered joints, and longitudinal through holes of two adjacent prefabricated well walls on the upper layer and the lower layer are communicated.
Further, in the method, the distance between the center of the outermost longitudinal through hole of the prefabricated well wall and the end face of the prefabricated well wall is half of the center distance between the two longitudinal through holes.
The beneficial effects of the invention are as follows: according to the method, the prefabricated shaft walls are spliced into the shaft through sequential staggered joint butt joint, the prefabricated shaft walls are prefabricated in sections in a factory according to design requirements, only hoisting and assembling are needed on site, so that the construction time is greatly saved, meanwhile, the excavation and enclosure exposure time of the shaft foundation pit is reduced, the complex process of a wet operation procedure is simplified, the labor intensity of workers is reduced, the engineering quality is easy to control, the construction speed is high, the cost is low, and the method is environment-friendly. The construction method for centralized prefabrication and on-site assembly can effectively ensure the construction quality, shorten the construction period and have good social and economic effects.
Drawings
Fig. 1 is a schematic view of the shaft structure of the present invention.
FIG. 2 is a schematic diagram of the vertical connection structure of the prefabricated well wall of the present invention.
Fig. 3 is a schematic view of the structure of the invention without penetrating the longitudinal connector and the anchor rod.
Fig. 4 is an enlarged schematic view of the structure at I in fig. 2 according to the present invention.
Fig. 5 is a schematic cross-sectional view of the present invention.
Fig. 6 is a schematic top view of the present invention.
Fig. 7 is an enlarged schematic view of the structure at II in fig. 6 according to the present invention.
Marked in the figure as: 1 prefabricated well wall, 2 longitudinal through holes, 3 longitudinal connecting pieces, 4 grouting anchoring holes, 5 arc-shaped through holes, 6 circumferential grooves, 7 longitudinal grooves, 8 longitudinal convex grooves, 9 water stop adhesive tapes, 10 anchor rods, 11 annular connecting ribs, 12 annular reinforcing ribs and 13 bottom plates.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the construction method of the prefabricated shaft of the present invention includes the steps of:
a. the shape and the size of the prefabricated well wall 1 are designed according to the structural size of the vertical shaft, the geological conditions of construction and the surrounding environmental factors, and the prefabricated well wall 1 is prefabricated in a factory and then transported to a construction site;
b. the construction positioning paying-off and layered earth excavation are carried out, after the earth is excavated to the depth of the first section of prefabricated well wall 1, the first section of prefabricated well wall 1 is assembled into a ring shape in sequence, and water stop adhesive tapes 9 are arranged at the inner side and the outer side of the joint of the adjacent prefabricated well walls 1;
c. the anchor rod 10 passes through a grouting anchoring hole 4 on the prefabricated well wall 1, is hammered into a soil layer, is injected with cement paste, and is pressed into concrete or cement mortar outside the prefabricated well wall 1 to be filled tightly;
d. continuously excavating soil downwards, and sequentially assembling the second section of prefabricated well wall 1 into a ring shape after the second section of prefabricated well wall 1 is deep, so that the upper layer of prefabricated well wall 1 and the lower layer of prefabricated well wall 1 are connected into a whole;
e. the anchor rods 10 penetrate through grouting anchoring holes 4 on the prefabricated well wall 1 of the second layer, are hammered into the soil layer, cement slurry is injected, and concrete or cement slurry is pressed into the outer side of the well wall to be filled tightly;
f. the cavities between each layer of adjacent prefabricated well walls 1 and the cavities between the prefabricated well walls 1 on the upper layer and the lower layer are filled with micro-expansion cement paste;
g. d, repeating the steps d to f to construct downwards to the substrate, and finishing the installation of the shaft wall structure;
h. and (5) pouring the bottom plate 13 at the bottom of the well. It can be understood by those skilled in the art that the shaft structure can be directly formed by splicing a plurality of layers of bodies through the method, and each layer of body is formed by splicing the prefabricated well walls 1, so that the actual shaft structure is formed by splicing a plurality of prefabricated well walls 1 longitudinally and circumferentially. Step a is mainly a preparation stage, and a proper prefabricated well wall 1 is actually made according to design data. Step b, foundation pit excavation, namely determining the first layer excavation depth according to the height of the prefabricated well wall 1, sequentially assembling the first section of prefabricated well wall 1 into a ring shape, and connecting adjacent prefabricated well walls 1The water-stopping adhesive tape 9 is arranged on the inner side and the outer side of the seam, and water prevention is realized through the water-stopping adhesive tape 9. And C, anchoring the prefabricated well wall 1, specifically, hammering the anchor rods 10 into a soil layer through grouting anchoring holes 4 on the prefabricated well wall 1, injecting cement paste, pressing C20 fine stone concrete or cement mortar into the outer side of the prefabricated well wall 1 for compaction, and fixing the first layer of prefabricated well wall 1. While it may be preferred that the anchor 10 be formed fromThe steel pipe is made into a length of 2000mm, the soil-entering end is conical, and the anchor rod 10 is provided with +.>The quincuncial grouting holes enter the soil layer in a hammering mode. D, continuously excavating until the depth of the second layer of prefabricated well wall 1, installing the prefabricated well wall 1, and connecting the upper layer of prefabricated well wall 1 and the lower layer of prefabricated well wall 1 into a whole. Step e anchors the second prefabricated well wall 1. And f, grouting and compacting, namely, grouting and compacting by adopting micro-expansion cement paste in a cavity between each layer of adjacent prefabricated well walls 1 and a cavity between the prefabricated well walls 1 on the upper layer and the lower layer. And d, repeating the steps d to f and constructing downwards to the substrate to finish the installation of the shaft wall structure. And finally, pouring construction of the bottom plate 13 at the bottom of the well is completed through the step h.
Preferably, in the above method, two ends of the prefabricated well wall 1 in the step a are respectively provided with a longitudinal convex groove 8 and a longitudinal groove 7, so that the left and right adjacent prefabricated well walls 1 are connected through the longitudinal convex grooves 8 and the longitudinal grooves 7. It can be understood by those skilled in the art that the method preferably arranges the longitudinal convex grooves 8 and the longitudinal grooves 7 on the two end surfaces of the prefabricated well wall 1 respectively, and the circumferential fixation of the prefabricated well wall 1 is realized by the longitudinal convex grooves 8 being clamped into the longitudinal grooves 7 of the adjacent prefabricated well walls 1, that is, the left and right adjacent prefabricated well walls 1 can be connected into a whole.
Preferably, in the above method, in the step a, an arc-shaped rotating circumferential groove 6 is provided on the upper end surface of the prefabricated well wall 1, an annular reinforcing rib 12 is provided in the circumferential groove 6, the intersection of the longitudinal connecting piece 3 and the annular reinforcing rib 12 is fixedly connected, and water stop adhesive tapes 9 are installed on the inner side and the outer side of the adjacent joint of the well wall. It can be understood by those skilled in the art that in order to increase the circumferential structural strength of the shaft wall, the method preferably comprises the steps of arranging the circumferential groove 6 and the annular reinforcing rib 12 between two adjacent prefabricated shaft walls 1 along the longitudinal direction, arranging the circumferential groove 6 and the annular reinforcing rib 12 along the circumference of the shaft, and actually preferably arranging the water stop adhesive tape 9 on the inner side and the outer side of the shaft for preventing water leakage, and filling the middle cavity surrounded by the water stop adhesive tape 9 with cement paste for filling, thereby improving the waterproof performance and the integrity of the shaft. For the convenience of grouting, the cross-sectional dimensions of the actual longitudinal connecting piece 3 and the annular reinforcing ribs 12 are obviously smaller than those of the longitudinal through holes 2 and the circumferential grooves 6, so that the longitudinal connecting piece 3 and the annular reinforcing ribs 12 can shake, and the longitudinal connecting piece 3 and the annular reinforcing ribs 12 are preferably connected by binding or welding, so that the integrity of a shaft wall is enhanced.
Preferably, in the above method, a plurality of through longitudinal through holes 2 are uniformly and alternately arranged on the upper and lower end surfaces of the prefabricated well wall 1 in the step a, longitudinal connecting pieces 3 are penetrated into the longitudinal through holes 2, and the upper and lower prefabricated well walls 1 are connected after cement slurry is poured. It can be understood by those skilled in the art that the vertical through holes 2 penetrating through are formed in the upper end face and the lower end face of the prefabricated well wall 1, the vertical connecting piece 3 is penetrated in the vertical through holes 2, and after cement slurry is poured, the upper prefabricated well wall 1 and the lower prefabricated well wall 1 are connected, the steel bars or the steel pipes of the vertical connecting piece 3 are effectively fixed and prevented from moving up and down, meanwhile, the binding force between the steel bars or the steel pipes and the cement slurry is improved, and the vertical connecting piece 3 and the poured cement slurry cylinder are connected with each other to improve the integral rigidity of the prefabricated well wall 1. The longitudinal connecting piece 3 is arranged in the longitudinal through hole 2 in a penetrating way from top to bottom, so that the length of the longitudinal connecting piece is long, and in order to facilitate installation and reduce cost, the longitudinal connecting piece 3 is preferably a steel bar or a steel pipe, and is actually connected by adopting threads or welding to form one piece.
Preferably, in the above method, an arc-shaped through hole 5 is provided in the middle of the prefabricated well wall 1 in the step a, and a metal bellows or a plastic bellows is pre-embedded in the arc-shaped through hole 5. It can be understood by those skilled in the art that in the method, the arc-shaped through holes 5 are preferably formed in the annular middle of each prefabricated well wall 1, the arc-shaped through holes 5 of each layer of well wall are communicated circumferentially and circumferentially after being spliced, the arc-shaped through holes 5 are also communicated with the longitudinal through holes 2, the longitudinal through holes 2 and the longitudinal connecting pieces 3, the arc-shaped through holes 5 and the annular reinforcing ribs 12 form longitudinal and circumferential poured micro-expansion cement columns which play a reinforcing role on the vertical shaft, the integral strength, the rigidity and the stability of the well wall are greatly improved, and the construction safety and the construction quality of the vertical shaft are improved. In order to ensure the channel size of the arc-shaped through hole 5, the method is preferably to pre-embed a metal corrugated pipe or a plastic corrugated pipe in the arc-shaped through hole 5, so that the structural strength of the arc-shaped through hole 5 is increased, and meanwhile, the arc-shaped through hole is smooth in opening, so that later grouting is facilitated.
Preferably, in the method, the excavation diameter in the step b is larger than the structural size of the vertical shaft by 100-200 mm. It will be appreciated by those skilled in the art that in order to facilitate the installation of the prefabricated well wall 1, the method preferably involves excavation of a diameter greater than 100 to 200mm of the structural dimensions of the shaft.
Preferably, in the step f of the method, the communicating pore canal of the longitudinal through hole 2 and the arc-shaped through hole 5 is filled with micro-expansion cement paste; and the longitudinal convex grooves 8, the longitudinal grooves 7 and the middle cavities of the circumferential grooves 6 are closely packed by micro-expansion cement slurry. It can be understood by those skilled in the art that the sealing of both sides of the cavity is realized by the water stop adhesive tape 9 in order to ensure the overall structural strength of the shaft. Preferably, the communicated pore canal of the longitudinal through hole 2 and the arc-shaped through hole 5 is filled with micro-expansion cement paste for compaction; and the longitudinal convex grooves 8, the longitudinal grooves 7 and the middle cavities of the circumferential grooves 6 are closely packed by micro-expansion cement slurry.
Preferably, in the method, after each layer of prefabricated well wall 1 is installed, annular connecting ribs 11 are arranged on the outer side, and the annular connecting ribs 11 are connected with anchor rods 10. It will be appreciated by those skilled in the art that in order to increase the circumferential structural strength of the shaft, the method preferably provides annular connecting ribs 11 on the outside of the prefabricated shaft wall 1, the annular connecting ribs 11 interconnecting the anchor rods 10, and filling concrete between the outside of the prefabricated shaft wall 1 and the soil layer.
Preferably, in the method, each layer of prefabricated well wall 1 longitudinally adopts staggered joint butt joint, and the longitudinal through holes 2 of two adjacent prefabricated well walls 1 at the upper layer and the lower layer are communicated. It can be understood by those skilled in the art that, since the longitudinal through holes 2 are uniformly arranged along the middle of the prefabricated well wall 1, structural strength is ensured by adopting staggered joint butt joint during actual longitudinal splicing, stress concentration after grouting is avoided, and the longitudinal through holes 2 of the upper prefabricated well wall 1 and the lower prefabricated well wall 1 are required to be ensured to be communicated, the longitudinal connecting piece 3 penetrates into the holes, cement slurry is poured into the longitudinal through holes 2, the reinforcing steel bars or the steel pipes of the longitudinal connecting piece 3 are effectively fixed, the vertical movement of the reinforcing steel bars or the steel pipes and the cement slurry is prevented, meanwhile, the binding force of the reinforcing steel bars or the steel pipes and the cement slurry is improved, and the longitudinal connecting piece 3 and the poured cement slurry cylinder are connected with the prefabricated well wall 1, so that the integral rigidity of the well wall is improved.
Preferably, in the above method, the distance between the center of the outermost longitudinal through hole 2 of the prefabricated well wall 1 and the end face thereof is half of the center distance between the two longitudinal through holes 2. It can be understood by those skilled in the art that, in order to ensure that the longitudinal through holes 2 of the prefabricated well walls 1 which are vertically adjacent are always opposite after the adjacent prefabricated well walls 1 are spliced, the distance between the center of the outermost longitudinal through hole 2 of the prefabricated well wall 1 and the end face of the outermost longitudinal through hole is half of the center distance between the two adjacent longitudinal through holes 2, that is, the longitudinal through holes 2 are always equidistantly arranged after the longitudinal convex grooves 8 and the longitudinal grooves 7 are spliced.
Claims (10)
1. The construction method of the prefabricated vertical shaft is characterized by comprising the following steps:
a. designing the shape and the size of a prefabricated well wall (1) according to the structural size of a vertical shaft, geological conditions where construction is located and surrounding environmental factors, and carrying out prefabrication in a factory and then transporting to a construction site;
b. setting out construction positioning, excavating earthwork in layers, and sequentially assembling the first section of prefabricated well wall (1) into a ring shape after excavating to the depth of the first section of prefabricated well wall (1), wherein water stop adhesive tapes (9) are arranged at the inner side and the outer side of a joint of the adjacent prefabricated well walls (1);
c. the anchor rod (10) passes through a grouting anchoring hole (4) on the prefabricated well wall (1), is hammered into a soil layer, cement slurry is injected, and concrete or cement slurry is pressed into the outer side of the prefabricated well wall (1) for compaction;
d. continuously excavating soil downwards, and sequentially assembling the second section of prefabricated well wall (1) into a ring shape after the second section of prefabricated well wall (1) is in depth, so that the upper layer of prefabricated well wall (1) and the lower layer of prefabricated well wall (1) are connected into a whole;
e. the anchor rod (10) passes through a grouting anchoring hole (4) on a prefabricated well wall (1) of the second layer, is hammered into a soil layer, cement slurry is injected, and concrete or cement slurry is pressed into the outer side of the well wall to be filled tightly;
f. the cavities between each layer of adjacent prefabricated well walls (1) and the cavities between the prefabricated well walls (1) at the upper layer and the lower layer are filled with micro-expansion cement paste;
g. d, repeating the steps d to f to construct downwards to the substrate, and finishing the installation of the shaft wall structure;
h. and (5) pouring construction of the bottom plate (13) at the bottom of the well.
2. The method for constructing a prefabricated shaft according to claim 1, wherein: in the step a, the two ends of the prefabricated well wall (1) are respectively provided with a longitudinal convex groove (8) and a longitudinal groove (7), so that the left prefabricated well wall and the right prefabricated well wall (1) are connected through the longitudinal convex grooves (8) and the longitudinal grooves (7).
3. A method of constructing a prefabricated shaft as claimed in claim 2, wherein: in the step a, an arc-shaped rotary circumferential groove (6) is formed in the upper end face of the prefabricated well wall (1), annular reinforcing ribs (12) are arranged in the circumferential groove (6), the intersection of the longitudinal connecting piece (3) and the annular reinforcing ribs (12) is fixedly connected, and water stop adhesive tapes (9) are arranged on the inner side and the outer side of adjacent joints of the well wall.
4. A method of constructing a prefabricated shaft as claimed in claim 2, wherein: in the step a, a plurality of through longitudinal through holes (2) are uniformly arranged on the upper end face and the lower end face of the prefabricated well wall (1) at intervals, longitudinal connecting pieces (3) penetrate into the longitudinal through holes (2), and the upper prefabricated well wall and the lower prefabricated well wall (1) are connected after cement slurry is poured.
5. The method for constructing a prefabricated shaft according to claim 4, wherein: in the step a, an arc-shaped through hole (5) is formed in the middle of the prefabricated well wall (1), and a metal corrugated pipe or a plastic corrugated pipe is pre-buried in the arc-shaped through hole (5).
6. The method for constructing a prefabricated shaft according to claim 1, wherein: and b, the excavation diameter is larger than the structural size of the vertical shaft by 100-200 mm.
7. The method for constructing a prefabricated shaft according to claim 5, wherein: in the step f, the communicated pore canal of the longitudinal through hole (2) and the arc-shaped through hole (5) is filled with micro-expansion cement paste for compaction; and the middle cavities of the longitudinal convex grooves (8), the longitudinal grooves (7) and the circumferential grooves (6) are filled with micro-expansion cement paste for compaction.
8. The method for constructing a prefabricated shaft according to claim 1, wherein: after each layer of prefabricated well wall (1) is installed, annular connecting ribs (11) are arranged on the outer side, and the annular connecting ribs (11) are connected with anchor rods (10).
9. The method for constructing a prefabricated shaft according to claim 1, wherein: the longitudinal prefabricated well walls (1) of each layer are in staggered joint connection, and the longitudinal through holes (2) of the two adjacent prefabricated well walls (1) of the upper layer and the lower layer are communicated.
10. The method for constructing a prefabricated shaft according to claim 9, wherein: the distance between the center of the outermost longitudinal through hole (2) of the prefabricated well wall (1) and the end face of the vertical through hole is half of the center distance between the two longitudinal through holes (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310632403.7A CN116497856A (en) | 2023-05-31 | 2023-05-31 | Construction method of prefabricated assembly shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310632403.7A CN116497856A (en) | 2023-05-31 | 2023-05-31 | Construction method of prefabricated assembly shaft |
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| CN116497856A true CN116497856A (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310632403.7A Pending CN116497856A (en) | 2023-05-31 | 2023-05-31 | Construction method of prefabricated assembly shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116856932A (en) * | 2023-09-01 | 2023-10-10 | 中国建筑第四工程局有限公司 | Large-diameter prestress assembly vertical shaft structure containing glass fiber rib part and construction method |
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2023
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116856932A (en) * | 2023-09-01 | 2023-10-10 | 中国建筑第四工程局有限公司 | Large-diameter prestress assembly vertical shaft structure containing glass fiber rib part and construction method |
| CN116856932B (en) * | 2023-09-01 | 2023-11-14 | 中国建筑第四工程局有限公司 | Large-diameter prestress assembly vertical shaft structure containing glass fiber rib part and construction method |
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