Fabricated steel casing safety protection device for digging iron tower foundation hole pile

Abstract

The utility model discloses an assembly type steel casing safety protection device for digging an iron tower foundation hole pile, which is formed by splicing a well mouth section and an underground section, the well mouth section and the underground section are respectively spliced into a cylinder body by a plurality of steel belts through bolts, and angle steel is annularly welded on the upper inner ring, the middle inner ring and the lower inner ring of the cylinder body for reinforcement. Angle steel is also vertically arranged on the middle section of the inner side of the cylinder body for reinforcement, a lifting lug is arranged on the angle steel welded to the upper end of the cylinder body, and a deformed steel bar anti-slip strip is further arranged at the inner end of the well mouth section. According to the scheme, by referring to the principles of a large hole pile steel casing and a concrete retaining wall which are mechanically mounted and dismounted, the steel casing is decomposed into a light assembly type steel casing protection device which can be quickly transported, mounted and dismounted manually in a narrow hole pile environment on the basis that safety checking calculation is qualified, and the traditional time-consuming and consumable concrete retaining wall is replaced with certain strength; the safety risk brought to workers in a pit due to local hole wall collapse in the hole pile digging process is avoided. The weight is light, the threaded steel anti-slip strips are arranged, the structure is simple, use and popularization are convenient, and high social value and economic value are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety protection, and in particular relates to an assembled steel casing safety protection device for excavating pile holes in an iron tower foundation. Background Art

[0002] In high-voltage power transmission and transformation line projects, since the transmission line routes are generally arranged on high mountains and steep hills to avoid farmland and cultivated land, the transportation of materials and equipment is extremely difficult. There is no condition for mechanical rotary drilling in the construction of transmission line tower foundation piles, and only traditional manual excavation technology can be used. On high mountains and steep hills, transportation conditions and construction conditions are severely limited. In order to ensure the safety of construction workers during the excavation process, it is also particularly important.

[0003] The Chinese utility model patent with publication number CN215482919U discloses a recyclable locking steel casing for deep silty soil. The guard plates are spliced ​​by positioning sockets, which is easy to install. At the same time, the two guard plates are buckled together by a locking rod, which is easy to operate. When pulling out, just remove the locking rod to loosen the two guard plates for easy removal. The Chinese invention patent with publication number CN113605383A discloses a segmented lowering steel casing for bored pile construction, including an upper steel casing, a lower steel casing, and a plurality of connecting card plate assemblies connecting the upper and lower steel casings. The structure is simple to operate, the upper and lower steel casings are easy to disassemble, and the upper removable upper steel casing can be repeatedly recycled. It has strong operability, a wide range of promotion, and low construction cost. The above two cylinders are used in the scenario proposed in this background. Their weight does not meet the requirements, they are difficult to carry, and are not suitable for safety protection during human excavation. Utility Model Content

[0004] In order to solve the above problems, the utility model aims to provide an assembled steel casing safety protection device for excavating pile holes in an iron tower foundation.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an assembled steel casing safety protection device for excavating pile holes in an iron tower foundation, which includes a wellhead section and a downhole section spliced ​​together. The wellhead section and the downhole section are both spliced ​​into a cylinder by a number of steel belts through pins, and angle steels are welded circumferentially on the upper, middle and lower inner circles of the cylinder for reinforcement, and angle steels are also vertically arranged on the inner middle section of the cylinder for reinforcement, and a lifting lug is arranged on the angle steel welded at the upper end of the cylinder, and a threaded steel anti-slip strip is also arranged at the inner end of the wellhead section.

[0006] Preferably, the wellhead section is composed of three and a half pieces of 1mm thick steel strips, and the downhole section is composed of three and a half pieces of 1mm thick steel strips, and the radius and height of the wellhead section and the downhole section are equal.

[0007] Preferably, a plurality of latches are provided at the connection between the steel strips from top to bottom.

[0008] Preferably, the angle steel is 25 angle steel.

[0009] Preferably, the lower opening of the wellhead section and the lower opening of the downhole section are both provided with angle steel drilling pins for connecting the two sections.

[0010] Preferably, the lifting lug is used for lifting by a hand winch.

[0011] Preferably, a steel guard plate is installed on the upper ring of the wellhead section, and a threaded steel anti-slip strip is welded on the steel guard plate.

[0012] Preferably, the weight of a single component of the wellhead section is less than 20 kg, and the weight of a single component of the downhole section is less than 15 kg.

[0013] Compared with the prior art, the utility model has the following advantages: This solution draws on the principle of large-scale pile steel casing and concrete wall installed by machinery, decomposes the steel casing into a light assembled steel casing protection device that can be quickly transported and installed manually in a narrow pile hole environment on the basis of qualified safety verification, and replaces the traditional time-consuming and material-consuming concrete wall with a certain strength to solve the safety risks brought to the workers in the pit by the collapse of the local hole wall during the pile excavation process. It is also light in weight, equipped with threaded steel anti-slip strips, simple in structure, easy to use, easy to promote, and has high social and economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a three-dimensional diagram of the assembled steel casing safety protection device for excavating the foundation hole pile of the iron tower in the utility model;

[0016] Figure 2 It is a top view of the wellhead section of the assembled steel casing safety protection device for excavating the hole pile of the iron tower foundation in the utility model;

[0017] Figure 3 It is a front view of the wellhead section of the utility model of the assembled steel casing safety protection device for the excavation of the hole pile of the iron tower foundation;

[0018] In the figure, 1-wellhead section; 2-downhole section; 3-pin; 4-angle steel; 5-lifting ear. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0020] Reference Figure 1-Figure 3 An assembled steel casing safety protection device for excavating pile holes in a tower foundation comprises a wellhead section 1 and a downhole section 2, both of which are spliced ​​together into a cylinder body by a number of steel belts through a latch 3, angle steels 4 are welded circumferentially on the upper, middle and lower inner rings of the cylinder body for reinforcement, and an angle steel 4 is also vertically arranged on the inner middle section of the cylinder body for reinforcement, a lifting lug 5 is arranged on the angle steel 4 welded at the upper end of the cylinder body, and a corrugated steel anti-slip strip and a threaded steel anti-slip strip are also arranged at the inner end of the wellhead section 1.

[0021] The wellhead section 1 is composed of three and a half pieces of 1mm thick steel strips, and the downhole section 2 is composed of three and a half pieces of 1mm thick steel strips. The radius and height of the wellhead section 1 and the downhole section 2 are equal. A number of pins 3 are arranged at the connection between the steel strips from top to bottom. The angle steel 4 adopts 25 angle steel. The lower end of the wellhead section 1 and the lower end of the downhole section 2 are both provided with angle steel drilling pins for connecting the two sections. The lifting lug 5 is used for lifting with a hand winch. A steel guard plate is installed on the upper ring of the wellhead section 1, and a threaded steel anti-slip strip is welded on the steel guard plate. The weight of a single component of the wellhead section 1 is less than 20kg, and the weight of a single component of the downhole section 2 is less than 15kg.

[0022] Embodiment: A φ48 steel pipe tripod support is set at the opening of the pile hole, and two 1t hand chain hoists are set at the support points, and the lifting stroke of the hand chain hoist is 1.2 meters.

[0023] Wellhead section 1: 0.8 meters deep, composed of three and a half pieces of 1mm thick steel belts. The upper, middle and lower inner rings of the steel belts are intermittently welded and reinforced with 25 angle steel to ensure the rigidity of the cylinder. The combined components are 25 angle steel holes with M8 pins 3, and the upper wellhead is 0.25 meters wide with a 2mm thick ring-mounted steel guard plate. 2*12 threaded steel anti-slip strips are welded on the guard plate to prevent workers from slipping. The lower reinforced 25 angle steel holes with M10 pins 3 are used to connect with the downhole section 1. The middle section of the inner side of the three-half cylinder is equipped with a vertical reinforcement 25 angle steel 4, and the angle steel is equipped with a lifting lug 5 for lifting with a hand winch. The weight of a single component is less than 20kg.

[0024] Downhole section 2: Each section is 0.8 meters deep and is composed of three and a half pieces of 1mm thick steel belts. The upper, middle and lower inner rings of the steel belts are intermittently welded and reinforced with 25 angle steel 4 to ensure the rigidity of the cylinder. The combined components are 25 angle steel drilled with M10 pins 3, and the upper and lower ends are reinforced with 25 angle steel drilled with M12 pins 3, which are used to connect with the upper and lower sections. The middle section of the inner side of the two halves is provided with a vertical reinforcement 25 angle steel 4, and the angle steel 4 is provided with a lifting lug 5 for lifting with a hand chain hoist. The weight of a single component is less than 15kg.

[0025] Installation order:

[0026] 1) A lifting device is set up at the wellhead to lift the cylinder through the steel pipe hanging beam;

[0027] 2) The wellhead is manually excavated to a depth of 1.5 meters;

[0028] 3) Pouring of anti-collapse concrete at the wellhead;

[0029] 4) The wellhead sections (three pieces) are hoisted in separately and assembled into a whole;

[0030] 5) Continue digging manually for 1 meter;

[0031] 6) The underground sections (three pieces) are hoisted in separately and assembled into a whole;

[0032] 7) Continue to dig and install the underground section until the top of the pile expansion section;

[0033] 8) The removal order is the opposite of the installation order.

[0034] The above is a detailed introduction to the assembled steel casing safety protection device for the excavation of the tower foundation pile provided by the utility model. This article uses specific examples to illustrate the structure and working principle of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An assembled steel casing safety protection device for excavating pile holes in a tower foundation, characterized in that: The invention comprises a wellhead section (1) and a downhole section (2) which are spliced ​​together. The wellhead section (1) and the downhole section (2) are both spliced ​​together into a cylinder by a plurality of steel strips through a latch (3). Angle steels (4) are welded circumferentially on the upper, middle and lower inner rings of the cylinder for reinforcement. Angle steels (4) are also vertically arranged on the inner middle section of the cylinder for reinforcement. A lifting lug (5) is arranged on the angle steel (4) welded on the upper end of the cylinder. A corrugated steel anti-slip strip or a threaded steel anti-slip strip is also arranged on the inner end of the wellhead section (1).

2. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: The wellhead section (1) and the downhole section are both composed of three half-pieces of 1mm thick steel strips, and the radius and height of the wellhead section (1) and the downhole section (2) are equal.

3. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: A plurality of latches (3) are arranged from top to bottom at the connection between the steel strips.

4. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: The angle steel (4) is a 25mm angle steel.

5. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: The lower opening of the wellhead section (1) and the lower opening of the downhole section (2) are both provided with angle steel drilling pins for connecting the two sections.

6. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: The lifting lug (5) is used for lifting by a hand chain hoist.

7. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: A steel guard plate is installed on the upper ring of the wellhead section (1), and a threaded steel anti-slip strip is welded on the steel guard plate.

8. The assembled steel casing safety protection device for excavating pile holes in a tower foundation according to claim 1 is characterized in that: The weight of a single component of the wellhead section (1) is less than 20 kg, and the weight of a single component of the downhole section (2) is less than 15 kg.

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