Pile foundation pore-forming construction protection structure under 330KV high-voltage line in complex geology

Abstract

A complex geological pile foundation pore-forming construction protection structure under a 330KV high-voltage line comprises a foundation pit and the 330KV high-voltage line, high-voltage line towers are arranged on the left side and the right side of the foundation pit, the 330KV high-voltage line is arranged on the two high-voltage line towers, and the 330KV high-voltage line is located over the foundation pit and crosses the foundation pit. A plurality of concrete foundations are arranged in two rows on the left side and the right side of a foundation pit, triangular supports are installed on the concrete foundations, a protective net is jointly installed on the triangular supports, and the protective net is located between the foundation pit and a 330KV high-voltage line. The protection net is arranged on the foundation pit below the 330KV high-voltage line, so that the safety of the 330KV high-voltage line, a pile machine and on-site constructors is ensured, the construction difficulty is greatly reduced, the safety in the construction process is improved, safety accidents are avoided, and great social benefits and economic benefits are obtained.

Description

Technical Field

[0001] The utility model relates to the field of pile foundation construction, in particular to a construction protection structure for pile hole forming in complex geology under 330KV high-voltage lines. Background Technique

[0002] At present, the foundation and foundation engineering in our country has developed rapidly. When carrying out basic construction in engineering construction, various complex construction environments have to be faced. Therefore, the pile foundation construction technology must be strictly managed and controlled to avoid affecting the construction. Among them, especially when there is a 330kV high-voltage line above the site and a hard pebble layer underground during construction, the pile driver construction is more inconvenient and prone to safety accidents.

[0003] Therefore, there is an urgent need for a construction protection structure for pile hole forming in complex geology under 330KV high-voltage lines to solve the above technical problems. Content of the Utility Model

[0004] The utility model aims to solve the above problems, thereby providing a construction protection structure for pile hole forming in complex geology under 330KV high-voltage lines. By setting a protective net on the foundation pit under 330KV high-voltage lines, the safety of 330KV high-voltage lines, pile drivers and on-site construction personnel is ensured, the construction difficulty is greatly reduced, the safety during the construction process is improved, and safety accidents are avoided.

[0005] The technical solution adopted by the utility model to solve the above problems is as follows:

[0006] A construction protection structure for pile hole forming in complex geology under 330KV high-voltage lines includes a foundation pit and 330KV high-voltage lines. High-voltage line towers are arranged on both the left and right sides of the foundation pit. The 330KV high-voltage lines are arranged on the two high-voltage line towers, and the 330KV high-voltage lines are located directly above the foundation pit and span the foundation pit. The protection structure includes a number of concrete foundations. The number of concrete foundations are arranged in two rows on the left and right sides of the foundation pit, and triangular brackets are installed on each concrete foundation. A protective net is commonly installed on a number of triangular brackets. The protective net is located between the foundation pit and the 330KV high-voltage lines; a number of triangular brackets are arranged in two corresponding rows on the left and right sides of the foundation pit. There is an interval between two adjacent triangles in the same row. The triangular brackets arranged in a row on the left side of the foundation pit and the triangular brackets arranged in a row on the right side of the foundation pit correspond to each other and are commonly installed with a number of steel wires. A number of steel wires all span the foundation pit and are located directly above the foundation pit. The protective net is installed on a number of steel wires. Embedded hooks are buried on the side of the two rows of triangular brackets away from the foundation pit. The embedded hooks correspond to the triangular brackets one by one. The two ends of the steel wire are correspondingly bolted to the two embedded hooks, and a turnbuckle is connected to the steel wire.

[0007] Preferably, a further technical solution of the utility model is as follows:

[0008] Preferably, the triangular support includes a vertical rod, an inclined rod is connected to the upper end of the vertical rod, at least one connecting rod is vertically connected between the vertical rod and the inclined rod, the lower end of the vertical rod is fixed in the concrete foundation, a connecting bottom plate is connected to the lower end of the inclined rod, and at least one expansion bolt for fixing the connecting bottom plate is provided on the connecting bottom plate.

[0009] Preferably, both the concrete foundation and the triangular support are coated with yellow and black reflective warning paint.

[0010] Preferably, an infrared scanning warning component is jointly arranged on both sides of the foundation pit. The infrared scanning warning component includes an infrared receiver arranged on the left side of the foundation pit and an infrared transmitter arranged on the right side of the foundation pit and connected to the infrared receiver.

[0011] Preferably, a plurality of warning signs are arranged around the foundation pit, and the plurality of warning signs are arranged around the edge of the foundation pit.

[0012] Preferably, video monitoring devices are arranged on both the left side and the right side of the foundation pit.

[0013] Preferably, a lightning protection component is further included. The lightning protection component includes a plurality of lightning protection copper cores. The plurality of lightning protection copper cores are connected in a loop and arranged in the foundation pit, and the plurality of lightning protection copper cores are all grounded.

[0014] The utility model adopting the above technical solution, compared with the prior art, its prominent feature is:

[0015] The utility model solves the problem of safety protection in the process of pile hole formation in complex geology under 330KV high-voltage lines. By setting a protective net on the foundation pit under 330KV high-voltage lines, the safety of 330KV high-voltage lines, pile drivers and on-site construction personnel is ensured, the construction difficulty is greatly reduced, the safety during the construction process is improved, safety accidents are avoided, and great social and economic benefits are achieved. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the front view structure of the utility model;

[0017] In the figure: 1. Foundation pit; 2. 330KV high-voltage line; 3. High-voltage line tower; 4. Concrete foundation; 5. Triangular support; 6. Protective net; 7. Steel wire rope; 8. Embedded hook; 9. Flower basket bolt; 10. Infrared receiver; 11. Infrared transmitter. Detailed Embodiment

[0018] The following description of the embodiments will help the public better understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solution of the present invention. Any changes to the definitions of components or technical features and / or formal rather than substantive changes to the overall structure should be regarded as the scope of protection defined by the technical solution of the present invention.

[0019] See also Figure 1 As shown, the technical solution of the utility model is as follows:

[0020] A protective structure for pile foundation drilling construction in complex geology under a 330KV high-voltage line, comprising a foundation pit 1 and a 330KV high-voltage line 2, high-voltage line towers 3 are arranged on the left and right sides of the foundation pit 1, the 330KV high-voltage line 2 is arranged on the two high-voltage line towers 3, and the 330KV high-voltage line 2 is located directly above the foundation pit 1 and crosses the foundation pit 1, the protective structure comprises a plurality of concrete foundations 4, the number of the concrete foundations 4 is determined according to actual needs, the specifications of the concrete foundations 4 are 1000mm×1000mm×500mm, and the plurality of concrete foundations 4 are pre-buried on both sides of the foundation pit 1, the plurality of concrete foundations 4 are arranged in two rows on the left and right sides of the foundation pit 1, and triangular brackets 5 are installed on the concrete foundations 4, and protective nets 6 are installed on the plurality of triangular brackets 5, and the protective nets 6 are located in the foundation pit. 1 and 330KV high-voltage line 2; a plurality of triangular brackets 5 are arranged in two rows corresponding to the left and right sides of the foundation pit 1, and two adjacent triangles in the same row are arranged at intervals, the triangular brackets 5 arranged in a row on the left side of the foundation pit 1 correspond one-to-one with the triangular brackets 5 arranged in a row on the right side of the foundation pit 1 and are jointly installed with a plurality of steel wire ropes 7, and the plurality of steel wire ropes 7 all cross the foundation pit 1 and are located directly above the foundation pit 1, and a protective net 6 is installed on the plurality of steel wire ropes 7, and pre-buried hooks 8 are buried on the side of the two rows of triangular brackets 5 away from the foundation pit 1, and the pre-buried hooks 8 correspond one-to-one with the triangular brackets 5, and the two ends of the steel wire rope 7 are correspondingly bolted to the two pre-buried hooks 8, and a basket bolt 9 is connected to the steel wire rope 7, so that the tightness of the steel wire rope 7 is adjusted by screwing the basket bolt 9, and then the tightness of the protective net 6 is adjusted.

[0021] The triangular bracket 5 includes a vertical support rod, which is a square tube of 100mm×100mm×5mm and has a height of 10000mm. An inclined support rod is connected to the upper end of the vertical support rod, and at least one connecting rod is vertically connected between the vertical support rod and the inclined support rod. The lower end of the vertical support rod is fixed in the concrete foundation 4, and a connecting base plate is connected to the lower end of the inclined support rod, and at least one expansion bolt for fixing the connecting base plate is arranged on the connecting base plate.

[0022] The concrete foundation 4 and the triangular bracket 5 are coated with yellow and black reflective warning paint, which is used as a safety warning for offline construction workers.

[0023] Infrared scanning warning components are arranged on both sides of the foundation pit 1, and the infrared scanning warning components include an infrared receiver 10 arranged on the left side of the foundation pit 1, and an infrared transmitter 11 arranged on the right side of the foundation pit 1 and connected to the infrared receiver 10; to ensure that there is no mechanical operation in the high-voltage line warning area on site, when the machine exceeds the warning area, the infrared area will issue a warning to remind the operator.

[0024] Several warning signs are arranged around the foundation pit 1, and the warning signs are arranged around the edge of the foundation pit 1 to serve as safety warnings to construction personnel offline.

[0025] Video surveillance equipment is installed on the left and right sides of the foundation pit 1 to monitor on-site workers and prevent them from mistakenly entering the warning area.

[0026] It also includes a lightning protection component, which includes a plurality of lightning protection copper cores. The plurality of lightning protection copper cores are connected in a ring and arranged in the foundation pit 1, and the plurality of lightning protection copper cores are grounded.

[0027] Construction method: Establish high-voltage line protection measures; install lightning protection devices; harden the road on the site; use small rotary drilling rigs and reverse circulation drilling rigs for construction; release the center of the retaining pile position according to the pile position coordinate data provided in the design drawings, and according to the actual situation on site, the center of the bored pile is 100mm outward; according to the clear requirements of the drawings, the pile position deviation is not more than 50mm; after the site is set out and checked, recheck it; mark the center point of the pile position, and the pile position should be protected in time after it is placed, and the cross line is set to control the pile position and take protective measures;

[0028] The casing adopts a 10mm thick steel plate welded integral steel casing, with an inner diameter 100mm larger than the drill bit diameter and a buried depth of 3m. When buried, the center of the casing coincides with the pile center with a deviation of less than 20mm. The top is 0.3m above the ground, and clay should be used to tamp the surrounding area of ​​the casing. A new type of chemical polymer mud is used to increase the viscosity and yield value of the mud, improve the ability to form mud skin, maintain the stability of the hole wall, and prevent cement or salt from contaminating the mud. Through the mud preparation ratio test, the effectiveness of the mud during the construction process is continuously improved;

[0029] The main material for mud production is polymer mud for drilling construction: place the above-mentioned mud pool, determine the water content of the mud pool according to the amount used, and install the mud pump and impeller pump beside the pool, and do a good job of protection around it; inject clean water into the mud pool, turn on the impeller pump for self-circulation, add polymer mud for drilling construction to the water injection pipe, and add it slowly and evenly. When used for the first time, the maximum amount is generally used, and the amount added is 4 / 10,000, that is, 40 kg of polymer mud for drilling construction is added to 100 m³ of water, and then stirred with an impeller pump for 20 minutes. The viscosity of the solution is measured with an engineering funnel. When it is about 22 seconds, it can meet general engineering geology;

[0030] After the drilling rig is in place, inject mud into the hole, and the mud level should be not less than 1 m higher than the groundwater level; the drill bit should enter and exit the mud surface slowly, and replenish the mud in time during drilling to keep the water head in the hole not less than 40 cm below the top of the casing to stabilize the water head pressure; the drill cuttings or drill mud should be transported away in time to prevent the mud from seeping in from the periphery of the hole position, causing the soil around the casing to sink and resulting in the sinking and displacement of the casing. During the drilling process, the formation should be judged according to the drill cuttings at any time, and the mud specific gravity should be adjusted in time. At the same time, the mud specific gravity should be checked frequently during drilling, and the viscosity, sand content rate and other indicators should be measured regularly, and strictly controlled according to the performance index standards. At the same time, attention should be paid to keeping the mud level in the hole stable;

[0031] When using a rotary drilling rig to form a hole through the pebble layer and reach the ultimate length, continue to construct the mud circulation tank. Select a reverse circulation drilling rig and use an 8t truck crane to align it with the pile position. Then use a spirit level to correct the horizontal and verticality of the fuselage and drill pipe. Start the motor, lower the drill bit, and inject mud with a mud pump. The drilling rig will drill step by step. After one section of the drill pipe is drilled, stop the machine in time and connect the second section. Repeat this process until the designed depth is reached; when the designed depth is reached, stop drilling, clean the surrounding mud, and prepare to lower the steel reinforcement cage. The hole formation is completed.

[0032] The utility model solves the problem of safety protection during the hole formation of pile foundations in complex geology under the 330KV high-voltage line 2. By setting a protective net 6 on the foundation pit 1 under the 330KV high-voltage line 2, the safety of the 330KV high-voltage line 2, the pile driver and the on-site construction personnel is ensured, the construction difficulty is greatly reduced, the safety during the construction process is improved, safety accidents are avoided, and great social and economic benefits are achieved.

[0033] The above are only the preferred and feasible embodiments of the utility model, and do not limit the scope of rights of the utility model accordingly. Any equivalent changes made by using the description and drawings of the utility model are included in the scope of rights of the utility model.

Claims

1. A protective structure for pile foundation hole construction in complex geology under a 330KV high-voltage line, comprising a foundation pit and a 330KV high-voltage line, high-voltage line towers are arranged on the left and right sides of the foundation pit, the 330KV high-voltage line is arranged on the two high-voltage line towers, and the 330KV high-voltage line is located directly above the foundation pit and crosses the foundation pit, characterized in that: The protective structure includes several concrete foundations, which are arranged in two rows on the left and right sides of the foundation pit, and triangular brackets are installed on the concrete foundations. A protective net is installed on the several triangular brackets, and the protective net is located between the foundation pit and the 330KV high-voltage line; several triangular brackets are arranged in two rows on the left and right sides of the foundation pit, and two adjacent triangles in the same row are arranged at intervals. The triangular brackets arranged in a row on the left side of the foundation pit correspond to the triangular brackets arranged in a row on the right side of the foundation pit one by one and are jointly installed with several steel wire ropes. The several steel wire ropes span the foundation pit and are located directly above the foundation pit. The protective net is installed on the several steel wire ropes, and embedded hooks are buried on the side of the two rows of triangular brackets away from the foundation pit. The embedded hooks correspond to the triangular brackets one by one, and the two ends of the steel wire rope are correspondingly bolted to the two embedded hooks, and the steel wire rope is connected with a basket bolt.

2. The protective structure for pile foundation drilling construction in complex geology under the 330KV high-voltage line according to claim 1 is characterized by: The triangular bracket includes a vertical support rod, an inclined support rod is connected to the upper end of the vertical support rod, at least one connecting rod is vertically connected between the vertical support rod and the inclined support rod, the lower end of the vertical support rod is fixed in the concrete foundation, the lower end of the inclined support rod is connected to a connecting base plate, and at least one expansion bolt for fixing the connecting base plate is arranged on the connecting base plate.

3. The protective structure for pile foundation drilling construction in complex geology under the 330KV high-voltage line according to claim 1 is characterized by: The concrete foundation and the tripod are coated with yellow and black reflective warning paint.

4. The protective structure for pile foundation drilling construction in complex geology under the 330KV high-voltage line according to claim 1 is characterized by: Infrared scanning warning components are arranged on both sides of the foundation pit. The infrared scanning warning components include an infrared receiver arranged on the left side of the foundation pit, and an infrared transmitter arranged on the right side of the foundation pit and connected to the infrared receiver.

5. The protective structure for pile foundation drilling construction in complex geology under the 330KV high-voltage line according to claim 1 is characterized by: Several warning signs are set up around the foundation pit, and several warning signs are set up around the edge of the foundation pit.

6. The protective structure for pile foundation drilling construction in complex geology under the 330KV high-voltage line according to claim 1 is characterized by: Video surveillance equipment is installed on the left and right sides of the foundation pit.

7. The protective structure for pile foundation drilling construction in complex geology under the 330KV high-voltage line according to claim 1 is characterized by: It also includes a lightning protection component, which includes a plurality of lightning protection copper cores. The plurality of lightning protection copper cores are connected in a ring and arranged in a foundation pit, and the plurality of lightning protection copper cores are all grounded.

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