CN218479820U - Supporting construction of surveying footrill - Google Patents
Supporting construction of surveying footrill Download PDFInfo
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- CN218479820U CN218479820U CN202221211780.0U CN202221211780U CN218479820U CN 218479820 U CN218479820 U CN 218479820U CN 202221211780 U CN202221211780 U CN 202221211780U CN 218479820 U CN218479820 U CN 218479820U
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Abstract
The utility model provides a supporting structure for surveying adit, which comprises a plurality of supporting units which are arranged at intervals and continuously in a tunnel section with poor stability of adit surrounding rock along the adit trend, wherein the supporting units comprise side walls respectively attached to the inner walls of two sides of the tunnel section and a plurality of supporting steels attached to the top wall in the tunnel section; the end parts of the supporting steels are fixed on the side wall corresponding to the side where the supporting steels are arranged side by side. According to the technical scheme, on one hand, the technical problems that the exploration adit of the large-scale infrastructure engineering collapses and loses the original effect are solved; on the other hand, compared with the existing chamber support type, the method can ensure the stability of the adit, simultaneously maintain the original observation function of the adit, has small excavation section, good structural stress condition and convenient construction, is particularly suitable for the exploration adit support which needs to be maintained for a long time and has poorer surrounding rock stability, effectively saves the investment of the adit support and prolongs the service life of the adit.
Description
Technical Field
The utility model relates to a visual survey footrill supporting construction.
Background
In recent decades, with the construction of a large number of water conservancy and hydropower projects such as three gorges, white crane beaches, brocade two-stage projects and the like, the water conservancy and hydropower investigation design technology in China develops rapidly, and the method obtains remarkable achievement in the field of hydropower project construction. Geological drilling and exploration footrill are common means for geotechnical surveying of large-scale foundation facilities such as hydraulic and hydroelectric engineering. The geological phenomena are recorded and mapped through drilling and adit, geological tests are carried out, the geological phenomena in an engineering area are found out, and accurate basic data can be provided for engineering design. In particular, the exploration adit has the advantages of intuition, visibility and the like, and has an important function for projects with complex geological conditions.
However, in general, the more complicated geological conditions are (such as complicated foundations, side slopes, landslides and the like), the worse the stability of the cavern surrounding rock is, the collapse of the exploration adit is easy to happen, and the need for reinforcing support is met. In addition, the construction period of large-scale projects is often long, and some projects can be as long as decades, and if the exploration adit which costs a lot is collapsed, the effect of the cave is greatly reduced. At present, the excavation section of the adit mainly has a tunnel shape, a rectangular shape and the like, and the supporting structure mainly comprises (net hanging) sprayed concrete, reinforced concrete lining, steel support combined anchor rods, drain holes and the like. The concrete is sprayed (hung on a net) and the reinforced concrete is used for lining and supporting, the stabilization and reinforcement effect on the cavern is good, but the geological information disclosed by the exploration adit of the supporting cavern section is shielded; the steel support is convenient to construct, but is mainly used for temporary support, and the supporting effect and the durability are poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an one of the purposes lies in overcoming the shortcoming that exists among the prior art, provides one kind and can guarantee the stability of exploration adit, can keep the geology phenomenon of adit again, have the adit supporting construction who observes the function.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a supporting structure for surveying adit comprises a plurality of supporting units which are arranged at intervals and continuously in a cave section with poor cave surrounding rock stability along the direction of the adit, wherein each supporting unit comprises side walls which are respectively attached to the inner walls of two sides of the cave section and a plurality of supporting steels which are attached to the top wall of the cave section; the end parts of the supporting steels are fixed on the side wall corresponding to the side where the supporting steels are located, and the supporting steels are arranged side by side.
Furthermore, the section form of the supporting unit is the same as the excavation section profile of the tunnel section at the position of the supporting unit.
Further, the adit is excavated from a triangular top-bottom section; the supporting steel is I-shaped steel, the end parts of the supporting steel are connected with each other, and the rest end is fixed at the top of the side wall on the corresponding side.
Furthermore, a connecting plate is welded at the end of each support steel, and the connecting plates are fastened through bolts and nuts to connect the two support steels.
Furthermore, a connecting plate is welded at the end part of each supporting steel and is fixed on the top surface of the side wall, so that the supporting steel is fixed.
Further, the support steels are arranged continuously adjacent to or spaced apart from each other.
Further, the bottom plate of the hole section is leveled by concrete and hardened.
Furthermore, the side wall is of a reinforced concrete structure, a brick wall structure or a plain concrete structure.
Furthermore, one side or two sides of the footrill bottom plate are provided with drainage ditches and slope is found towards the direction of the cave opening.
Further, the height of the top of the adit is 1.8-2.5 m.
The technical scheme of the utility model, on one hand, solves the technical problems that the exploration adit of the large-scale infrastructure engineering collapses and loses the original function; on the other hand, compared with the existing chamber support type, the method can ensure the stability of the adit, simultaneously maintain the original observation function of the adit, has small excavation section, good structural stress condition and convenient construction, is particularly suitable for the exploration adit support which needs to be maintained for a long time and has poorer surrounding rock stability, effectively saves the investment of the adit support and prolongs the service life of the adit.
Drawings
Fig. 1 isbase:Sub>A typicalbase:Sub>A-base:Sub>A cross-sectional view of the present invention.
Fig. 2 is a typical B-B longitudinal section of the present invention.
Fig. 3 is a schematic view of the connection between the support steel and the N1 connecting plate of the present invention.
FIG. 4 is a schematic view of the connection between the support steel and the N2 connecting plate of the present invention
Fig. 5 is a schematic structural view showing the connection of the support steels according to the present invention.
In the figure: the adit excavation outline line 1, the supporting unit 10, the side wall 2, the supporting steel 3, the drainage ditch 4, the bottom plate 5, the N1 connecting plate 6, the N2 connecting plate 7, the observation section 8, the welding line 9, the bolt hole 30, the bolt 31, the nut 32 and the threaded hole 33.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Reference is made to the accompanying drawings. The embodiment comprises a plurality of supporting units 10, wherein the supporting units 10 are arranged at intervals and continuously in a tunnel section with poor stability of the surrounding rocks of the adit along the moving direction of the adit, so that an observation section 8 is formed at the interval, and a surveyor can observe the internal condition of the adit conveniently. Moreover, a supporting section is formed at the position of the supporting unit 10, and the observation section and the supporting section are alternately arranged, so that the stability and the safety of the adit are enhanced on one hand, and the original functions of the adit are reserved on the other hand. According to different practical engineering conditions, the observation section and the support section can be arranged at equal distance, and the lengths of the observation section and the support section can be adjusted.
The side wall 2 is preferably a reinforced concrete structure in this embodiment, but a brick wall structure or a plain concrete structure may be used. The supporting steel 3 in this embodiment is an i-steel, and one end of the supporting steel 3 is welded with an N1 connecting steel plate 6, and the other end is welded with an N2 connecting steel plate 7. Wherein the N2 connecting steel plates 7 on the two supporting steels 3 are mutually fastened through bolts 31 and nuts 32 so as to ensure that the supporting steels 3 are mutually connected in an angular shape and attached to the inner top wall of the hole section. The N1 connecting steel plate 6 on each supporting steel 3 is fixed at the top of the side wall 2 on the corresponding side, so that the supporting steel 3 is stably fixed. Therefore, the load on the top of the cavern can be transmitted to the side walls 2 on the two sides, and the supporting structure has good stress condition and good stability. The connected support steels 3 are arranged side by side at intervals. The connected supporting steels 3 can also be continuously and adjacently arranged according to different practical engineering situations. At least the tunnel section bottom plate 5 is leveled and hardened by concrete, or the whole concrete of the adit bottom plate 5 is leveled and hardened. According to different practical conditions of engineering, the treatment such as leveling and hardening can be omitted.
One side or two sides of the footwall are provided with drainage ditches 4 and find slopes towards the direction of the opening. According to different actual conditions of engineering, the drainage ditch 4 is not needed.
It should be noted that the above describes exemplifying embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above embodiments, which are only used for illustrating the principle of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed.
Claims (8)
1. A supporting structure for surveying adit is characterized by comprising a plurality of supporting units which are arranged at intervals and continuously in a tunnel section with poor adit surrounding rock stability along the adit direction, wherein each supporting unit comprises side walls which are respectively attached to the inner walls on two sides of the tunnel section and a plurality of supporting steels which are attached to the top wall in the tunnel section; the end part of the supporting steel is fixed on the side wall corresponding to the side wall.
2. A supporting structure in a survey adit as claimed in claim 1, wherein said supporting unit has the same cross-section as the excavation section of said tunnel section at the location thereof.
3. A support structure for a survey adit as claimed in claim 2, wherein said adit is a triangular top and bottom section excavation; the supporting steel is I-shaped steel, the end parts of the supporting steel are connected with each other, and the rest end is fixed at the top of the side wall on the corresponding side.
4. The supporting structure for exploration footrill of claim 3, wherein a connecting plate is welded to an end of each of said supporting steels, and said connecting plates are fastened to each other by bolts and nuts to connect said supporting steels.
5. A supporting structure in a survey adit as claimed in claim 3, wherein each of said support steels has a connecting plate welded to an end thereof, said connecting plate being secured to said top wall face to secure said support steel thereto.
6. A support structure for a survey adit according to any one of claims 1 to 5, wherein said support steels are arranged in successive abutment or spaced relation to each other.
7. A supporting structure in a survey adit as claimed in claim 6, wherein said side walls are reinforced concrete structures or brick wall structures or plain concrete structures.
8. A support structure for a survey adit as claimed in claim 6, wherein said adit has a top height of 1.8 to 2.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221211780.0U CN218479820U (en) | 2022-05-18 | 2022-05-18 | Supporting construction of surveying footrill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221211780.0U CN218479820U (en) | 2022-05-18 | 2022-05-18 | Supporting construction of surveying footrill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218479820U true CN218479820U (en) | 2023-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221211780.0U Active CN218479820U (en) | 2022-05-18 | 2022-05-18 | Supporting construction of surveying footrill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218479820U (en) |
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2022
- 2022-05-18 CN CN202221211780.0U patent/CN218479820U/en active Active
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