Severe cold area pumped storage power station construction measurement control network observation pillar and construction method

Abstract

The invention discloses a severe cold area pumped storage power station construction measurement control network observation pillar and a construction method, and the construction method comprises the following steps: excavating a base pit at a construction site, cleaning the interior, and pouring concrete to half of the depth of the base pit; a prefabricated base steel reinforcement framework and a prefabricated column steel reinforcement framework are placed in the base pit, concrete is poured to the top face of the base steel reinforcement framework, and full vibration is conducted to enable the top face of the concrete to be in a horizontal state to form a base; a corrugated pipe is vertically arranged in the center of the base, and concrete is poured into the corrugated pipe and fully vibrated; and a forced centering device is arranged at the top of the corrugated pipe. According to the concrete heat preservation pipe, heat preservation can be effectively conducted on concrete, cracks of the concrete are prevented, the deeper corrugations play a role in fixing the whole pipe, and the situation that the whole pipe moves upwards can be effectively avoided.

Description

Technical Field

[0001] The invention relates to an observation pier for a construction measurement control network of a pumped storage power station in a severely cold region and a construction method thereof, and belongs to the technical field of observation equipment. Background Art

[0002] The border zone between my country's eastern and western regions boasts sparse vegetation, frequent sandstorms, and an extremely dry climate. Due to the basin's geographical location and topography, the valley is sandwiched between two mountains, with prevailing northwest and southeast winds. Extreme weather conditions are common, with temperatures reaching as high as 38°C and as low as -35.1°C.

[0003] Observation piers in the construction survey control network are fundamental to ensuring precise construction and layout of a project. Measurement accuracy is at the millimeter level. Most observation piers are located on mountaintops and other high-elevation locations within the region. If the exterior of the observation piers is not protected, extreme weather conditions in severely cold regions may cause deformation of the concrete piers, resulting in reduced measurement accuracy. Existing techniques often use customized straight PVC pipes to protect the exterior of the observation piers. While this provides some protection by preventing direct contact between the concrete and the outside world, it is prone to cracking and upward displacement of the pipe in severely cold regions. Therefore, we propose an observation pier and construction method for the construction survey control network of a pumped-storage power station in severely cold regions. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for constructing an observation pier for the construction measurement and control network of a pumped-storage power station in a severely cold area, and also to provide an observation pier for the construction measurement and control network of a pumped-storage power station in a severely cold area. The present invention can not only effectively insulate concrete and prevent cracks in the concrete, but also effectively avoid the situation where the entire pipe moves upward.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a method for constructing an observation pier for a construction measurement control network of a pumped storage power station in a severe cold region, comprising the following steps:

[0006] Excavate a foundation pit at the construction site, clean the interior, pour concrete to half the depth of the foundation pit, and vibrate the concrete thoroughly;

[0007] Place the prefabricated base reinforcement frame and column reinforcement frame into the base pit, tie and fix the column reinforcement frame and base reinforcement frame together, and place the column reinforcement frame vertically at the center of the top surface of the base reinforcement frame. Continue pouring concrete into the base pit to the top surface of the base reinforcement frame, fully vibrate and make the top surface of the concrete horizontal to form the base, and the top of the base extends out of the ground to form the pier surface;

[0008] Place the corrugated pipe vertically at the center of the base, with the column reinforcement skeleton at the center of the corrugated pipe, pour concrete into the corrugated pipe and vibrate it fully;

[0009] A forced centering device is installed on the top of the bellows.

[0010] In the aforementioned method for constructing observation piers for the measurement and control network of pumped-storage power stations in severely cold regions, during the pouring of concrete through the corrugated pipe, the concrete is vibrated once every 30 cm of pouring to remove air and moisture from the concrete, promote close arrangement between concrete particles, eliminate internal stress in the concrete, and thus improve the strength and durability of the concrete.

[0011] In the aforementioned method for constructing observation piers for the construction measurement and control network of pumped storage power stations in severe cold regions, when the corrugated pipe is poured to 5 cm from the top surface, a forced centering device is installed, and pouring is continued until the concrete is level with the top of the corrugated pipe.

[0012] In the aforementioned method for constructing observation piers for the construction measurement and control network of a pumped-storage power station in severely cold regions, the forced centering device is adjusted horizontally, and its inclination is no more than ±4°.

[0013] In the aforementioned method for constructing observation piers for the construction measurement and control network of a pumped-storage power station in severely cold regions, the inclination of the column after the bellows are cast is no more than ±1°.

[0014] The aforementioned method for constructing observation piers for the construction measurement and control network of pumped-storage power stations in severe cold regions is as follows: the bellows is made of double-layer material, the outer shell of the bellows is made of hard material, the groove notch depth of the outer shell of the bellows is 2 cm, the inner lining of the bellows is a soft PVC material with shallow grooves, the notch depth of the inner lining of the bellows is 1 mm, and the length of the bellows is 140 cm.

[0015] In the aforementioned method for constructing observation piers for the construction measurement and control network of a pumped storage power station in severe cold regions, after the bellows are cast, the side walls of the outer surface are sprayed with white exterior wall paint, and a nameplate can be nailed in the middle.

[0016] An observation pier for the construction measurement and control network of a pumped-storage power station in a severely cold region includes a base, which is cast by concrete and embedded in the ground surface of the construction site. A column reinforcement skeleton and a corrugated pipe are fixedly provided at the center of the upper surface of the base. The corrugated pipe is sleeved on the outer side of the column reinforcement skeleton, and concrete is cast in the corrugated pipe to form a column. A forced centering device is provided at the center of the upper surface of the column.

[0017] The aforementioned observation pier for the construction measurement and control network of the pumped storage power station in the severe cold region, the corrugated pipe includes an outer protective layer and an inner lining layer, the corrugated texture depth of the outer protective layer is 2cm, and the inner lining layer is a soft PVC material with shallow grooves, and the groove depth is 1mm.

[0018] For the aforementioned observation pier of the construction measurement control network of the pumped-storage power station in severe cold regions, the horizontal inclination of the forced centering device is not greater than ±4°, and the inclination of the column is not more than ±1°.

[0019] Compared with the existing technology, the present invention uses corrugated pipes to cast concrete, which can not only effectively insulate the concrete and prevent cracks in the concrete, but also the deeper corrugations have a fixing effect on the entire pipe, which can effectively avoid the situation where the entire pipe moves up, and effectively solves the problem of concrete strength reduction and deformation caused by the observation piers of the construction measurement control network in cold areas being outdoors for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the bellows structure of the present invention.

[0022] Figure numerals: 1-base pit, 2-base steel frame, 3-column steel frame, 4-base, 5-corrugated pipe, 6-forced centering device, 7-outer protective layer, 8-inner lining layer.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0024] Embodiment 1 of the present invention: A method for constructing an observation pier for a construction measurement control network of a pumped storage power station in a severe cold region, comprising the following steps:

[0025] Excavate a foundation pit 1 at the construction site, clean the interior, pour concrete to half the depth of the foundation pit, and vibrate the concrete thoroughly;

[0026] Place the prefabricated base reinforcement skeleton 2 and column reinforcement skeleton 3 into the base pit 1, tie and fix the column reinforcement skeleton 3 and the base reinforcement skeleton 2 together, and place the column reinforcement skeleton 3 vertically at the center of the top surface of the base reinforcement skeleton 2. Continue pouring concrete into the base pit 1 to the top surface 2 of the base reinforcement skeleton, fully vibrate and make the top surface of the concrete horizontal to form the base 4, and the top of the base 4 extends out of the ground to form the pier surface;

[0027] Place the bellows 5 vertically at the center of the base 4, and make the column steel skeleton 3 at the center of the bellows 5. Pour concrete into the bellows 5 and vibrate it thoroughly. After solidification, the concrete will be embedded in the thread groove of the bellows 5 to prevent the bellows 5 from detaching.

[0028] A forced centering device 6 is arranged on the top of the bellows 5 .

[0029] Embodiment 2 of the present invention: A method for constructing an observation pier for a construction measurement control network of a pumped storage power station in a severe cold region, comprising the following steps:

[0030] Excavate a foundation pit 1 at the construction site, clean the interior, pour concrete to half the depth of the foundation pit, and vibrate the concrete thoroughly;

[0031] Place the prefabricated base reinforcement skeleton 2 and column reinforcement skeleton 3 into the base pit 1, tie and fix the column reinforcement skeleton 3 and the base reinforcement skeleton 2 together, and place the column reinforcement skeleton 3 vertically at the center of the top surface of the base reinforcement skeleton 2. Continue pouring concrete into the base pit 1 to the top surface 2 of the base reinforcement skeleton, fully vibrate and make the top surface of the concrete horizontal to form the base 4. The top of the base 4 extends out of the ground to form the pier surface. After the corrugated pipe 5 is poured, the column inclination does not exceed ±1°;

[0032] The bellows 5 is vertically placed at the center of the base 4, and the column steel skeleton 3 is placed at the center of the bellows 5. Concrete is poured into the bellows 5 and fully vibrated. During the pouring of concrete into the bellows 5, the concrete is vibrated once every 30 cm to remove air and moisture from the concrete, promote close arrangement between concrete particles, eliminate internal stress in the concrete, thereby improving the strength and durability of the concrete. The solidified concrete is embedded in the thread groove of the bellows 5 to prevent the bellows 5 from detaching.

[0033] A forced centering device 6 is arranged on the top of the bellows 5 .

[0034] Embodiment 3 of the present invention: A method for constructing an observation pier for a construction measurement control network of a pumped storage power station in a severe cold region, comprising the following steps:

[0035] Excavate a foundation pit 1 at the construction site, clean the interior, pour concrete to half the depth of the foundation pit, and vibrate the concrete thoroughly;

[0036] Place the prefabricated base reinforcement skeleton 2 and column reinforcement skeleton 3 into the base pit 1, tie and fix the column reinforcement skeleton 3 and the base reinforcement skeleton 2 together, and place the column reinforcement skeleton 3 vertically at the center of the top surface of the base reinforcement skeleton 2. Continue pouring concrete into the base pit 1 to the top surface 2 of the base reinforcement skeleton, fully vibrate and make the top surface of the concrete horizontal to form the base 4. The top of the base 4 extends out of the ground to form the pier surface. After the corrugated pipe 5 is poured, the column inclination does not exceed ±1°;

[0037] The bellows 5 is vertically placed at the center of the base 4, and the column steel skeleton 3 is placed at the center of the bellows 5. Concrete is poured into the bellows 5 and fully vibrated. During the pouring of concrete into the bellows 5, the concrete is vibrated once every 30 cm to remove air and moisture from the concrete, promote close arrangement between concrete particles, eliminate internal stress in the concrete, thereby improving the strength and durability of the concrete. The solidified concrete is embedded in the thread groove of the bellows 5 to prevent the bellows 5 from detaching.

[0038] A forced centering device 6 is placed on the top of the corrugated pipe 5. During installation, the corrugated pipe 5 is poured to 5 cm from the top surface, and the forced centering device 6 is placed. Continue pouring until the concrete is level with the top of the corrugated pipe 5. The forced centering device 6 is adjusted to be horizontal, and its inclination is not greater than ±4°.

[0039] Embodiment 4 of the present invention: A method for constructing an observation pier for a construction measurement control network of a pumped storage power station in a severe cold region, comprising the following steps:

[0040] Excavate a foundation pit 1 at the construction site, clean the interior, pour concrete to half the depth of the foundation pit, and vibrate the concrete thoroughly;

[0041] Place the prefabricated base reinforcement skeleton 2 and column reinforcement skeleton 3 into the base pit 1, tie and fix the column reinforcement skeleton 3 and the base reinforcement skeleton 2 together, and place the column reinforcement skeleton 3 vertically at the center of the top surface of the base reinforcement skeleton 2. Continue pouring concrete into the base pit 1 to the top surface 2 of the base reinforcement skeleton, fully vibrate and make the top surface of the concrete horizontal to form the base 4. The top of the base 4 extends out of the ground to form the pier surface. After the corrugated pipe 5 is poured, the column inclination does not exceed ±1°;

[0042] The bellows 5 is vertically placed at the center of the base 4, and the column steel skeleton 3 is placed at the center of the bellows 5. Concrete is poured into the bellows 5 and fully vibrated. During the pouring of concrete into the bellows 5, the concrete is vibrated once every 30 cm to remove air and moisture from the concrete, promote close arrangement between concrete particles, eliminate internal stress in the concrete, thereby improving the strength and durability of the concrete. The solidified concrete is embedded in the thread groove of the bellows 5 to prevent the bellows 5 from detaching.

[0043] A forced centering device 6 is placed on the top of the corrugated pipe 5. During installation, the corrugated pipe 5 is poured to 5 cm from the top surface, and the forced centering device 6 is placed. Continue pouring until the concrete is level with the top of the corrugated pipe 5. The forced centering device 6 is adjusted to be horizontal, and its inclination is not greater than ±4°.

[0044] Among them, the bellows 5 is made of double-layer material, the bellows shell is made of hard material, the groove notch depth of the bellows shell is 2 cm, the bellows lining is a soft PVC material with shallow grooves, the notch depth of the bellows lining is 1 mm, and the length of the bellows 5 is 140 cm.

[0045] Specifically, after the bellows 5 is cast, its outer surface sidewalls are sprayed with white exterior wall paint, and a nameplate can be nailed in the middle.

[0046] Embodiment 5 of the present invention: An observation pier for a measurement control network for construction of a pumped-storage power station in a severely cold region, comprising a base 4, which is cast by concrete and embedded in the ground surface of a construction site. A column reinforcement skeleton 3 and a corrugated pipe 5 are fixedly provided at the center of the upper surface of the base 4. The corrugated pipe 5 is sleeved on the outside of the column reinforcement skeleton 3, and concrete is cast in the corrugated pipe 5 to form a column. A forced centering device 6 is provided at the center of the upper surface of the column.

[0047] Embodiment 6 of the present invention: An observation pier for a measurement and control network for construction of a pumped-storage power station in a severely cold region, comprising a base 4, which is cast by concrete and embedded in the ground surface of a construction site. A column reinforcement skeleton 3 and a corrugated pipe 5 are fixedly provided at the center of the upper surface of the base 4. The corrugated pipe 5 is sleeved on the outside of the column reinforcement skeleton 3, and concrete is cast in the corrugated pipe 5 to form a column. The inclination of the column does not exceed ±1°. A forced centering device 6 is provided at the center of the upper surface of the column. The horizontal inclination of the forced centering device 6 is not greater than ±4°. A wire threading pipe can also be pre-buried in the column. The length of the corrugated pipe 5 is 140 cm.

[0048] The corrugated pipe 5 includes an outer protective layer 7 and an inner lining layer 8. The corrugated texture depth of the outer protective layer 7 is 2 cm. The inner lining layer 8 is a soft PVC material with shallow grooves, and the groove depth is 1 mm.

[0049] The working principle of an embodiment of the present invention: the present invention adopts a bellows 5 for casting and construction, and the bellows 5 adopts a double-layer material; the outer protective layer 7 of the bellows 5 can be made of hard and hard materials such as stainless steel and hard PVC, and the inner lining layer 8 adopts a soft PVC material with a shallow groove. During installation, the bellows 5 is vertically placed in the center of the base 4, concrete is poured and fully vibrated. The bellows 5 can not only effectively insulate the concrete and prevent cracks in the concrete, but also the deeper threads of the bellows 5 have a fixing effect on the entire pipe, which can effectively avoid the situation where the entire pipe moves up, and avoid the problem of concrete strength reduction and deformation caused by the observation pier of the construction measurement and control network in cold areas being outdoors for a long time.

Claims

1. A method for constructing an observation pier for a construction survey control network of a pumped storage power station in severe cold regions, characterized in that: The following steps are involved: Dig a foundation pit at the construction site, clean the interior, pour concrete to half the depth of the foundation pit, and vibrate the concrete thoroughly; Place the prefabricated base steel frame and column steel frame into the base pit, pour concrete to the top surface of the base steel frame, vibrate it fully and make the top surface of the concrete in a horizontal state to form a base; Place the corrugated pipe vertically at the center of the base, and make the column steel frame at the center of the corrugated pipe, pour concrete into the corrugated pipe and vibrate it fully; A forced centering device is installed on the top of the bellows.

2. The method for constructing an observation pier for a construction survey and control network of a pumped storage power station in severe cold regions according to claim 1 is characterized in that: During the pouring of concrete with the corrugated pipe, the concrete is vibrated once every 30 cm of pouring.

3. The method for constructing an observation pier for a construction survey and control network of a pumped storage power station in severe cold regions according to claim 1 is characterized in that: When the corrugated pipe is poured to a distance of 5 cm from the top surface, a forced centering device is installed and pouring is continued until the concrete is level with the top of the corrugated pipe.

4. The method for constructing an observation pier for a construction survey and control network of a pumped storage power station in severe cold regions according to claim 1 is characterized in that: The forced centering device adjusts the level, and its inclination is not greater than ±4°.

5. The method for constructing an observation pier for a construction survey and control network of a pumped storage power station in severe cold regions according to claim 1, characterized in that: The column inclination of the bellows after casting is completed shall not exceed ±1°.

6. The method for constructing an observation pier for a construction survey and control network of a pumped storage power station in severe cold regions according to claim 1, characterized in that: The bellows is made of double-layer material. The outer shell of the bellows is made of hard material. The groove notch depth of the outer shell of the bellows is 2 cm. The inner lining of the bellows is made of soft PVC material with shallow grooves. The notch depth of the inner lining of the bellows is 1 mm. The length of the bellows is 140 cm.

7. The method for constructing an observation pier for a construction survey and control network of a pumped storage power station in severe cold regions according to claim 1, characterized in that: After the bellows is cast, the outer sidewalls are sprayed with white exterior wall paint.

8. An observation pier for a construction survey control network of a pumped storage power station in severe cold regions, constructed by the construction method according to any one of claims 1 to 7, characterized in that: The invention comprises a base, which is cast by concrete and embedded in the ground surface of the construction site. A column steel frame and a corrugated pipe are fixedly arranged at the center of the upper surface of the base. The corrugated pipe is sleeved on the outer side of the column steel frame. Concrete is cast in the corrugated pipe to form a column. A forced centering device is arranged at the center of the upper surface of the column.

9. The observation pier and construction method of the construction survey control network of a pumped storage power station in severe cold regions according to claim 8, characterized in that: The corrugated pipe comprises an outer protective layer and an inner lining layer, wherein the corrugated texture depth of the outer protective layer is 2 cm, and the inner lining layer is a soft PVC material with shallow grooves, and the groove depth is 1 mm.

10. The observation pier and construction method of the construction survey control network of a pumped storage power station in severe cold regions according to claim 9, characterized in that: The horizontal inclination of the forced centering device is not greater than ±4°, and the inclination of the column is not more than ±1°.

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