Foundation pit slope support sprayed concrete thickness detection needle

Abstract

The utility model discloses a foundation pit slope support sprayed concrete thickness detection needle which comprises a horizontal handrail and a scale stand column, a movable lantern ring is arranged on the scale stand column, a floating plate is arranged on the side wall of the bottom end of the movable lantern ring, a fastening bolt is arranged on the side wall of the movable lantern ring, and the floating plate is connected with the horizontal handrail. The fastening bolts and the floating plate are symmetrically arranged along the center of the movable lantern ring, the bottom end of the horizontal handrail is connected with the top end of the scale stand column in a welded mode, and a level gauge is arranged in the center of the horizontal handrail and fixedly connected with the horizontal handrail through a bearing platform. The thickness detection needle for the sprayed concrete of the foundation pit slope support is simple to operate, convenient to carry and accurate in measured data, and the possibility of deviation of the measured data is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thickness detection devices, in particular to a thickness detection needle for shotcrete of foundation pit slope support. Background Technique

[0002] A foundation pit is a space excavated downward from the ground for the construction of the underground part of a building (structure). A slope is an artificial slope formed by excavation or filling construction of building projects and municipal projects in and around a building site, and a natural slope that has an adverse impact on the safety or stability of a building (structure). Shotcrete for support is a project of the in-situ shotcrete structure form of the foundation pit slope. During the construction process, the thickness inspection of the concrete is the key work for the inspection of the engineering structure quality.

[0003] In the prior art, since the construction interface is an inclined plane, the more common thickness measurement method is to visually determine whether the thickness of the concrete at the construction interface meets the design requirements, which has the defects of large errors and lack of representativeness. Or, a straight steel bar is inserted into the uncured concrete, and the thickness is measured according to the mortar covering length after pulling out. When the construction area is large, there may be deviations. Moreover, when inserting the straight steel bar, it is very difficult to ensure the perpendicularity of the straight steel bar, resulting in measurement deviations. Content of the Utility Model

[0004] The purpose of the utility model is to provide a thickness detection needle for shotcrete of foundation pit slope support, which is simple to operate, convenient to carry, and has accurate measurement data, greatly reducing the possibility of deviation in measurement data.

[0005] To achieve the above purpose, the utility model provides a thickness detection needle for shotcrete of foundation pit slope support, which includes a horizontal handrail and a graduated column. A movable collar is arranged on the graduated column. A floating plate is arranged on the bottom side wall of the movable collar. A fastening bolt is arranged on the side wall of the movable collar. The fastening bolt and the floating plate are symmetrically arranged along the center of the movable collar. The bottom end of the horizontal handrail is welded to the top end of the graduated column. A level is arranged at the center position of the horizontal handrail. The level is fixedly connected to the horizontal handrail through a bearing platform.

[0006] Preferably, a plurality of marking lines are horizontally arranged on the side wall of the floating plate.

[0007] Preferably, a tip is fixedly connected to the bottom end of the graduated column. The graduated column is made of round steel with a diameter of 10 mm. The zero scale line of the graduated column is set at the tip of the tip. The measuring range of the graduated column is 0 - 1000 mm.

[0008] Preferably, the bottom surface of the floating plate is on the same horizontal plane as the bottom surface of the movable collar, and the side wall of the floating plate is rotatably connected to the movable collar through a rotating shaft.

[0009] Preferably, a threaded hole is provided on the side wall of the movable collar, the fastening bolt passes through the threaded hole, and the penetrating end of the fastening bolt abuts against the scale column.

[0010] Preferably, rubber washers are provided on the inner ring of the movable collar and the penetrating end of the fastening bolt.

[0011] Therefore, the present utility model adopts the above-mentioned detection needle for the thickness of shotcrete for foundation pit slope support, and the beneficial effects are as follows:

[0012] (1) The present utility model belongs to an integral structure, is short, light and convenient to carry. After the measuring device is used, it can be carried out of the field by personnel.

[0013] (2) The present utility model is simple to operate, the scale values on the surface of the scale column are accurately and clearly marked, the movable collar is movably connected by a fastening bolt, there is no notch, and the measurement data is accurate.

[0014] (3) The present utility model adopts a level and a floating plate to ensure the verticality of the scale column inserted into the concrete, and greatly reduces the possibility of deviation in the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an embodiment of the detection needle for the thickness of shotcrete for foundation pit slope support of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the movable collar of an embodiment of the detection needle for the thickness of shotcrete for foundation pit slope support of the present utility model.

[0017] REFERENCE SIGNS

[0018] 1, horizontal handrail; 2, scale column; 3, movable collar; 4, floating plate; 5, fastening bolt; 6, level; 7, bearing platform; 8, tip; 9, rotating shaft; 10, rubber washer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings understood by those with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] As shown in the figure, a shotcrete thickness detection needle for foundation pit slope support includes a horizontal handrail 1 and a scale column 2. A moving collar 3 is provided on the scale column 2. A floating plate 4 is arranged on the bottom side wall of the moving collar 3, and a fastening bolt 5 is arranged on the side wall of the moving collar 3. The whole belongs to an integral structure, which is short, light and convenient to carry. After the measuring device is used, it can be carried out of the field by personnel.

[0022] The bottom end of the horizontal handrail 1 is welded to the top end of the scale column 2. A level 6 is arranged at the center position of the horizontal handrail 1, and the level 6 is fixedly connected to the horizontal handrail 1 through a bearing platform 7. The bottom end of the scale column 2 is fixedly connected with a needle tip 8. The scale column 2 is made of round steel with a diameter of 10 mm. The zero scale line of the scale column 2 is set at the tip of the needle tip 8, and the measuring range of the scale column 2 is 0 - 1000 mm.

[0023] The bottom surface of the floating plate 4 is on the same horizontal plane as the bottom surface of the moving collar 3. There is no notch on the bottom surface of the moving collar 3, and the bottom surface of the moving collar 3 coincides with the scale value on the surface of the scale column 2. The side wall of the floating plate 4 is rotationally connected to the moving collar 3 through a rotating shaft 9. The floating plate 4 can float on the liquid surface of the concrete to ensure the flatness of the concrete in the thickness measurement area. A number of marking lines are horizontally arranged on the side wall of the floating plate 4. When the concrete liquid surface is flush with or coincides with the marking lines, it indicates that the flatness of the concrete meets the requirements.

[0024] The fastening bolt 5 and the floating plate 4 are symmetrically arranged along the center of the moving collar 3. A threaded hole is arranged on the side wall of the moving collar 3. The fastening bolt 5 passes through the threaded hole and is threadedly connected thereto. The penetrating end of the fastening bolt 5 abuts against the scale column 2. Rubber washers 10 are arranged on the inner ring of the moving collar 3 and the penetrating end of the fastening bolt 5. The rubber washers 10 ensure that the fastening bolt 5 fits tightly with the scale column 2. On the one hand, it avoids the loosening and displacement of the moving collar 3. On the other hand, it avoids problems such as wear of the scale value on the surface of the scale column 2 and unclear marks caused by extrusion.

[0025] During the actual use process, first, according to the relevant technical specifications, adjust the position of the bottom surface of the movable collar 3 on the graduated column 2, and manually tighten the fastening bolt 5. Secondly, hold the horizontal handrail 1 and vertically insert it into the unhardened concrete in the area to be measured until the tip 8 reaches the bottom of the concrete. At the same time, adjust the floating plate 4 until the bottom surface of the floating plate 4 fits the upper surface of the concrete, and at the same time adjust the angle of the graduated column 2 until the level 6 shows a horizontal state. Finally, record the thickness data and determine whether it meets the requirements of the relevant technical specifications. If the thickness is too high or too low, manually adjust the position of the bottom surface of the movable collar 3, record the relevant data, obtain the corrected result and feedback it to the relevant person in charge.

[0026] Therefore, the present utility model adopts the above-mentioned shotcrete thickness detection needle for foundation pit slope support, which has simple operation, is convenient to carry, and the measured data is accurate, greatly reducing the possibility of deviation in the measured data.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A foundation pit slope support shotcrete thickness detection needle, characterized by: It includes a horizontal handrail and a scale column, the scale column is provided with a movable ring, the bottom side wall of the movable ring is provided with a floating plate, the side wall of the movable ring is provided with a fastening bolt, the fastening bolt and the floating plate are symmetrically arranged along the center of the movable ring, the bottom end of the horizontal handrail is welded to the top end of the scale column, a level is provided at the center position of the horizontal handrail, and the level is fixedly connected to the horizontal handrail through a base.

2. A foundation pit slope support shotcrete thickness detection needle according to claim 1, characterized in that: A plurality of marking lines are horizontally arranged on the side wall of the floating plate.

3. A foundation pit slope support shotcrete thickness detection needle according to claim 2, characterized in that: The bottom end of the scale column is fixedly connected with a needle tip, the scale column is made of round steel with a diameter of 10 mm, the zero scale line of the scale column is set at the tip of the needle tip, and the measuring range of the scale column is 0 to 1000 mm.

4. A foundation pit slope support shotcrete thickness detection needle according to claim 3, characterized in that: The bottom surface of the floating plate and the bottom surface of the moving sleeve are located on the same horizontal plane, and the side wall of the floating plate is rotatably connected to the moving sleeve via a rotating shaft.

5. A foundation pit slope support shotcrete thickness detection needle according to claim 4, characterized in that: The side wall of the movable sleeve is provided with a threaded hole, the fastening bolt passes through the threaded hole, and the through end of the fastening bolt abuts against the scale column.

6. A foundation pit slope support shotcrete thickness detection needle according to claim 5, characterized in that: The inner ring of the movable sleeve and the through end of the fastening bolt are both provided with rubber washers.

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