CN112609733A - Construction method of reversible combined cyclone well - Google Patents
Construction method of reversible combined cyclone well Download PDFInfo
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- CN112609733A CN112609733A CN202011389326.XA CN202011389326A CN112609733A CN 112609733 A CN112609733 A CN 112609733A CN 202011389326 A CN202011389326 A CN 202011389326A CN 112609733 A CN112609733 A CN 112609733A
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- 238000010276 construction Methods 0.000 title claims abstract description 91
- 230000002441 reversible effect Effects 0.000 title claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 63
- 239000002689 soil Substances 0.000 claims abstract description 62
- 238000009412 basement excavation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005422 blasting Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
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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
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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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
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a construction method of a reversible combined cyclone well, which aims at solving the problem that rock layer construction is difficult to implement when the cyclone well with a mud layer as an upper layer and a hard rock layer as a lower layer is constructed, and belongs to the technical field of cyclone well construction. A construction method of a reversible combined cyclone well comprises the steps of firstly, supporting and dewatering construction; step two, constructing an outer cylinder of a soil layer section; and step three, inner cylinder construction and rock layer outer cylinder construction. The invention shortens the construction period of the cyclone well, and is particularly suitable for geological environment with soft soil and easy collapse.
Description
Technical Field
The invention belongs to the technical field of construction of cyclone wells, and particularly relates to a construction method of a cyclone well with a forward and backward combination.
Background
Along with the rapid development of the metallurgical industry, the swirl well is applied more and more, and the requirements on construction quality, safety and construction period are higher and higher. Conventional and traditional methods for constructing cyclone wells include large excavation, open caisson, underground diaphragm wall or reverse construction. The earthwork large excavation method is characterized in that foundation pit construction can also adopt a mode of completely digging a slope, but the foundation pit of the cyclone well is deep and large in diameter, the construction amount of the construction method is large, and surrounding plants and buildings are not allowed to be completely excavated. The open caisson method is characterized in that the open caisson cannot sink when the open caisson meets a hard rock layer with the underground compressive strength of more than 50-300 kilograms per square centimeter. The underground continuous wall method is suitable for the scheme in the general region with soft underground soil texture, and is particularly suitable for the construction of mucky soil layers in coastal regions, but the underground of the region is also limited by underground hard rock layers, and grooves cannot be formed at rock layers. In some areas with soft soil and without rock stratum, the rotational flow well deep foundation pit can be constructed by a full reverse construction method of row pile support and high-pressure jet grouting water-stop curtain support, but when the underground has hard rock stratum distribution, the cast-in-place pile can not drill to a position below the base. Therefore, the methods are difficult to implement when the upper layer is a soil layer and the underground has a hard rock layer and needs to be excavated by adopting an excavator and a rock drill or blasting excavation.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem that rock interval construction is difficult to implement when the swirl well with the upper layer of a mud layer and the lower layer of a hard rock layer is constructed, a construction method of the swirl well with a reversible combination is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a construction method of a reversible combined cyclone well is characterized in that the cyclone well is constructed in a geological environment with an upper layer of a mud layer and a lower layer of a hard rock layer, and the construction method of the cyclone well comprises the following steps:
step one, supporting and dewatering construction: constructing support piles along the periphery of the construction position of the well hole of the cyclone well, wherein the support piles are reinforced concrete cast-in-place piles, the lower ends of the support piles enter the rock layer for a certain depth, and after the construction of the support piles is completed, distributing pipe well precipitation along the periphery of the construction position of the well hole of the cyclone well;
step two, constructing an outer cylinder of a soil layer section: the construction method comprises the following steps that a well hole is downwards excavated from the designed top plate elevation of the cyclone well, construction is carried out in the mode of constructing an outer cylinder of one soil layer section, a concave-convex structure which is matched with each other is arranged at a construction joint between two adjacent outer cylinders of the soil layer section to prevent water, wherein the outer cylinder of the first soil layer section and a crown beam are constructed at the same time and connected together, a surrounding purlin connected with a supporting pile is constructed firstly after the last well hole is excavated to the required depth, excavation is continued to a rock stratum after the construction of the surrounding purlin is finished, and finally the outer cylinder of the last soil layer section connected with the surrounding purlin is constructed;
thirdly, inner barrel construction and rock layer outer barrel construction; after the construction of the outer cylinder of the soil layer section is completed, the outer cylinder of the soil layer section is continuously excavated downwards along the well hole to the required depth, after plain cement slurry is sprayed on the wall of the hole of the rock layer section, the bottom plate is firstly constructed, then the outer cylinder of the rock layer section is constructed from bottom to top, an annular bracket is constructed on the inner side of a construction joint at the joint of the outer cylinder of the soil layer section and the outer cylinder of the rock layer section, so that the outer cylinder supporting structure of the cyclone well is completed, the inner cylinder is constructed from bottom to top while the outer cylinder of the rock layer section.
Further, the outer barrel of the rock layer section is formed by pouring in multiple sections, and a water stop steel plate is arranged at a construction joint between every two adjacent sections.
Further, the annular bracket and the uppermost section of the outer barrel of the rock layer section are made of micro-expansion concrete with high strength.
Further, the depth of the lower end of the support pile entering the rock stratum is more than 2 meters.
Further, in the third step: and after the construction of the soil layer outer barrel is finished, continuously excavating downwards along the well hole to the required depth, and excavating together by adopting an excavator and a rock drill or blasting excavation.
Furthermore, between two adjacent soil layer section urceolus, the recess is equipped with in the terminal surface under the topmost soil layer section urceolus.
The invention has the beneficial effects that: the construction method of the cyclone well aims at the construction of the cyclone well with the upper layer being a mud layer and the lower layer being a hard rock layer, the method comprises constructing an earth layer borehole and an earth layer outer cylinder, constructing a rock layer borehole and an outer cylinder after the earth layer outer cylinder is completed, wherein the earth layer outer cylinder, a crown beam and a support pile form an inverted integral structure to bear force together, the support pile plays a role of supporting the earth layer outer cylinder, the earth layer outer cylinder protects the soil body of the earth layer pit wall, thereby facilitating the subsequent construction by adopting the modes of high efficiency and certain vibration impact property such as digging machine, rock drill or blasting, etc., the method solves the problem that the construction of the hard rock stratum section is difficult to implement, shortens the construction period of the cyclone well, and simultaneously, because the soil layer outer barrel adopts a mode of excavating one section from top to bottom and pouring one section, the excavation depth is shallow every time, the construction of the soil layer outer barrel is convenient for erecting a mould, and the soil layer outer barrel is particularly suitable for geological environment with soft soil and easy collapse.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
shown in the figure: the supporting pile comprises a supporting pile 1, a crown beam 2, a surrounding purlin 3, a soil layer outer barrel 4, a rock layer outer barrel 5, a bracket 6, a bottom plate 7, an inner barrel 8, a soil layer 9, a rock layer 10, a water stop steel plate 11, a groove 41, a first platform plate 81, a second platform plate 82, a platform column 83 and a top plate 84.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1 and 2, the construction method of the reversible combined cyclone well is implemented in a geological environment with an upper layer of a mud layer and a lower layer of a hard rock layer, and comprises the following steps:
step one, supporting and dewatering construction: constructing support piles 1 along the periphery of the construction position of the well hole of the cyclone well, wherein the support piles 1 are reinforced concrete cast-in-place piles, the lower end of each support pile 1 enters a rock layer 10 to a certain depth, and after the construction of the support piles 1 is completed, laying pipe well precipitation along the periphery of the construction position of the well hole of the cyclone well;
step two, constructing the soil layer section outer cylinder 4: the soil layer outer barrel 4 is divided into a plurality of sections for construction, two sections are shown in the figure, a well bore is excavated downwards from the elevation of a top plate 84 designed by the cyclone well, the construction is carried out in a mode of constructing the soil layer outer barrel 4 by a frame formwork, a concave-convex structure matched with each other is arranged at a construction joint between two adjacent soil layer outer barrels 4 so as to prevent water from seeping out from the construction joint, wherein the first section (positioned at the uppermost part) of the soil layer outer barrel 4 and the crown beam 2 are constructed at the same time and connected together, after the last section of the well bore is excavated to the required depth (the design depth of the purlin), a purlin 3 connected with the supporting pile 1 is constructed first, after the construction of the purlin 3 is finished, the excavation is continued to a rock stratum 10, and finally the last section of the soil layer outer barrel 4 connected with the pur;
thirdly, constructing an inner barrel 8 and an outer barrel 5 of a rock layer section; after the construction of the soil layer outer barrel 4 is completed, the soil layer outer barrel is continuously excavated downwards along the well hole to the required depth, after plain cement slurry is sprayed on the wall of the rock layer hole, the bottom plate 7 is firstly constructed, then the rock layer outer barrel 5 is constructed from bottom to top, the annular bracket 6 is constructed on the inner side of a construction joint at the joint of the soil layer outer barrel and the rock layer outer barrel, so that the outer barrel supporting structure of the cyclone well is completed, the inner barrel 8 is constructed from bottom to top while the rock layer outer barrel 5 is constructed, and finally the upper end of the inner barrel 8 and the upper end of the soil layer outer barrel 4 are connected together through the.
In the first step, precipitation generally needs to be reduced below the construction depth of the cyclone well, so that well holes can be conveniently excavated.
In one embodiment of the present invention, the groove 41 is formed on the lower end surface of the top soil layer outer barrel 4 between two adjacent soil layer outer barrels 4, and when the next soil layer outer barrel 4 is poured, concrete is filled into the groove 41 to form a protrusion matched with the groove, so as to prevent water from leaking out of the construction joint. Certainly, the bulge can be arranged on the lower end surface of the topmost soil layer section outer barrel 4 between the two adjacent soil layer section outer barrels 4, but the upper end of the next soil layer section outer barrel 4 is located on the outer part of the bulge, and concrete cannot be filled difficultly.
According to the invention, the soil layer outer barrel 4 is constructed by a segmented and segmented reverse construction method from top to bottom, the rock layer outer barrel is constructed by a sequential construction method from bottom to top, the annular bracket is poured on the inner side of a construction joint at the joint section of the soil layer outer barrel and the rock layer outer barrel, the upper outer barrel and the lower outer barrel are connected into a whole, and the annular bracket is poured on the inner side of the construction joint, so that the effects of convenience in concrete pouring, better construction joint of the upper outer barrel and the lower outer barrel, and compactness, waterproofness and attractiveness in concrete. According to the construction method, the rock interval well hole and the outer barrel are constructed after the soil interval outer barrel is completed, the soil interval outer barrel, the crown beam and the support pile form an inverted integral structure to bear force together, the support pile plays a role of supporting the soil interval outer barrel, the outer barrel protects the stability of soil mass of the soil interval well hole wall, the rock interval whirl well hole is convenient to construct in a mode of high efficiency and certain vibration impact performance such as common excavation or blasting excavation by using an excavator and a rock drill, the safety of the construction of the rock interval whirl well hole, the outer barrel and the inner barrel structure is improved, and the construction period of the whirl well is shortened. Meanwhile, the outer barrel of the soil layer section adopts a mode of excavating one section from top to bottom and pouring one section, so that the excavation depth is shallow every time, the construction of the outer barrel frame of the soil layer section is convenient, and the outer barrel frame is particularly suitable for geological environment with soft soil and easy collapse.
In the embodiment of the invention, the pile diameter of the supporting pile 1
800, the depth of the lower end into the rock layer 10 is greater than 2 metres to ensure its stability. And after the construction of the support piles is finished, 8 pipe wells are distributed around the construction position of the well hole of the flow well.
In the embodiment of the invention, the outer barrel of the rock layer section is formed by pouring in multiple sections, and a water-stopping steel plate 11 is arranged at the construction joint between two adjacent sections to prevent water. The outer barrel of the rock layer section is formed by pouring in multiple sections, and the pouring quality of the outer barrel of the rock layer section is mainly guaranteed.
In order to ensure the connectivity between the soil layer outer barrel and the rock layer outer barrel, the annular bracket and the uppermost section of the rock layer outer barrel are made of micro-expansive concrete with high strength. The amount of the expanding agent used for the micro-expansive concrete is usually 8-10%.
One specific construction process of the inner barrel 8 of the invention is as follows, the first section of the outer barrel of the rock interval is cast together with the first platform plate 81 of the inner barrel, the second section of the outer barrel of the rock interval is cast together with the second platform plate 82 of the inner barrel, the platform column 83 is cast together with the third section of the outer barrel and the annular bracket, the platform column 83 is cast in two sections, and finally the inner barrel and the outer barrel are connected into a whole by the construction top plate 84.
Claims (6)
1. A construction method of a reversible combined cyclone well is characterized in that the construction method of the cyclone well comprises the following steps:
step one, supporting and dewatering construction: constructing support piles along the periphery of the construction position of the well hole of the cyclone well, wherein the support piles are reinforced concrete cast-in-place piles, the lower ends of the support piles enter the rock layer for a certain depth, and after the construction of the support piles is completed, distributing pipe well precipitation along the periphery of the construction position of the well hole of the cyclone well;
step two, constructing an outer cylinder of a soil layer section: the construction method comprises the following steps that a well hole is downwards excavated from the designed top plate elevation of the cyclone well, construction is carried out in the mode of constructing an outer cylinder of one soil layer section, a concave-convex structure which is matched with each other is arranged at a construction joint between two adjacent outer cylinders of the soil layer section to prevent water, wherein the outer cylinder of the first soil layer section and a crown beam are constructed at the same time and connected together, a surrounding purlin connected with a supporting pile is constructed firstly after the last well hole is excavated to the required depth, excavation is continued to a rock stratum after the construction of the surrounding purlin is finished, and finally the outer cylinder of the last soil layer section connected with the surrounding purlin is constructed;
step three, inner cylinder construction and rock interval outer cylinder construction: after the construction of the outer cylinder of the soil layer section is completed, the outer cylinder of the soil layer section is continuously excavated downwards along the well hole to the required depth, after plain cement slurry is sprayed on the wall of the hole of the rock layer section, the bottom plate is firstly constructed, then the outer cylinder of the rock layer section is constructed from bottom to top, an annular bracket is constructed on the inner side of a construction joint at the joint of the outer cylinder of the soil layer section and the outer cylinder of the rock layer section, so that the outer cylinder supporting structure of the cyclone well is completed, the inner cylinder is constructed from bottom to top while the outer cylinder of the rock layer section.
2. The construction method of the reversible combined cyclone well as claimed in claim 1, wherein the outer barrel of the rock layer is divided into a plurality of sections for casting, and a water-stop steel plate is arranged at a construction joint between two adjacent sections.
3. The method for constructing the reversible combined cyclone well according to claim 2, wherein the annular bracket and the uppermost section of the outer barrel of the rock layer section are made of micro-expansion concrete with high strength.
4. The method for constructing a reversible combined cyclone well according to claim 1, wherein the depth of the lower end of the support pile entering the rock stratum is more than 2 m.
5. The construction method of the reversible combined cyclone well as claimed in claim 1, characterized in that in the third step: and after the construction of the soil layer outer barrel is finished, continuously excavating downwards along the well hole to the required depth, and excavating together by adopting an excavator and a rock drill or blasting excavation.
6. The construction method of the reversible combined cyclone well as claimed in claim 1, wherein the groove is formed between the outer cylinders of the two adjacent soil layer sections and on the lower end surface of the outer cylinder of the uppermost soil layer section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389326.XA CN112609733A (en) | 2020-12-02 | 2020-12-02 | Construction method of reversible combined cyclone well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389326.XA CN112609733A (en) | 2020-12-02 | 2020-12-02 | Construction method of reversible combined cyclone well |
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| Publication Number | Publication Date |
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| CN112609733A true CN112609733A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011389326.XA Pending CN112609733A (en) | 2020-12-02 | 2020-12-02 | Construction method of reversible combined cyclone well |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949226A (en) * | 2010-09-14 | 2011-01-19 | 中国华冶科工集团有限公司 | Cross construction method for large pool body |
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2020
- 2020-12-02 CN CN202011389326.XA patent/CN112609733A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949226A (en) * | 2010-09-14 | 2011-01-19 | 中国华冶科工集团有限公司 | Cross construction method for large pool body |
Non-Patent Citations (2)
| Title |
|---|
| 王文峰: "谈旋流池结构逆作法防渗施工措施", 《山西建筑》 * |
| 黎明中: "排桩挂壁式逆作圆拱形支护在岩溶地区深基坑中的应用", 《建筑技术》 * |
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Application publication date: 20210406 |