CN212027806U - Semi-closed pressure type soft rock roadway bottom plate supporting structure - Google Patents
Semi-closed pressure type soft rock roadway bottom plate supporting structure Download PDFInfo
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- CN212027806U CN212027806U CN202020093925.6U CN202020093925U CN212027806U CN 212027806 U CN212027806 U CN 212027806U CN 202020093925 U CN202020093925 U CN 202020093925U CN 212027806 U CN212027806 U CN 212027806U
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Abstract
The utility model relates to a semi-closed lets press type soft rock tunnel bottom plate supporting construction, including steel pipe concrete support group and concrete arch body (2), steel pipe concrete support group connects as an organic whole for at least two steel pipe concrete supports (1), the setting that steel pipe concrete support group partly imbeds is in the periphery of concrete arch body (2), and both constitute an organic whole structure, support the tunnel country rock jointly; the width of the concrete arch body (2) is not more than the whole width of the concrete-filled steel tube support group, a plurality of sets of the concrete-filled steel tube support groups are arranged along the roadway, and a pressure relief belt (6) which can be filled is arranged between every two sets of the concrete-filled steel tube support groups at the inverted bottom arch below the roadway floor (3). The utility model discloses can effectively avoid the frequent repair that soft rock tunnel medium bottom plate pucking caused, can effectively release bottom plate country rock pressure, guarantee tunnel normal use.
Description
Technical Field
The utility model relates to a roadway support technical field, more specifically say, especially relate to a semi-closed lets pressure type soft rock tunnel bottom plate supporting construction.
Background
The deep-buried soft rock roadway support is a big problem troubling the safety production of many coal mines, and due to the fact that the ground stress is large, the disturbing rheological effect is obvious, and the supporting counter force required by surrounding rock stabilization is large. Because surrounding rock is weak, the support mode that the stock anchor rope is the main part is relatively poor suitability, consequently, mostly adopt closed support or step arch support. When the totally-enclosed support is adopted, because the roadway bottom plate is controlled by the amount of labor and cost, the rise-span ratio of the bottom arch section is smaller, so that the bottom arch section is stressed less than the two side sections and the top arc section, and the roadway bottom bulge is easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the not enough among the above-mentioned prior art, develop a semi-closed bottom plate and let die mould soft rock tunnel support technique, can effectively avoid the frequent reprocess that the bottom plate pucking caused in the soft rock tunnel, can effectively release bottom plate country rock pressure, guarantee tunnel normal use.
The utility model provides a technical scheme that its technical problem adopted is:
a semi-closed profiling soft rock roadway bottom plate supporting structure comprises a concrete-filled steel tube support group and a concrete arch body, wherein the concrete-filled steel tube support group is formed by connecting at least two concrete-filled steel tube supports into a whole, the concrete-filled steel tube support group is arranged on the periphery of the concrete arch body in a semi-embedded mode and forms an integral structure to support roadway surrounding rocks together; the part above the concrete arch body terrace is continuously arranged along the axial direction of the roadway, and a fillable pressure relief belt is arranged between every two sets of steel pipe concrete support groups at the inverted bottom arch below the roadway terrace.
The roadway bottom plate is jointly loaded by the steel pipe concrete inverted bottom arch and the concrete arch body, the steel pipe concrete inverted bottom arch and the concrete arch body can ensure the supporting strength of the roadway bottom plate, and a pressure relief belt is reserved between the concrete arch bodies. When the roadway does not bulge, the pressure relief belt can be used as a bottom plate for bearing. When tunnel country rock pressure is great, the country rock is extruded from bottom plate pressure release area, and the pressure release area is bloated, and the unnecessary pressure release bulk cargo of workman's clearance can guarantee tunnel normal use. When the roadway surrounding rock is extruded from the pressure relief belt more, the extruded surrounding rock is broken, the porosity is high, the roadway surrounding rock can be cleaned without a rock breaking process, and the labor intensity is reduced.
Furthermore, the concrete arch body is of a closed structure above a terrace and a semi-closed terrace structure below the terrace. The tunnel bottom plate is jointly supported by the steel pipe concrete inverted bottom arch and the concrete arch body, the support strength of the tunnel bottom plate can be guaranteed by the steel pipe concrete inverted bottom arch and the concrete arch body is constructed after the steel pipe concrete support inverted bottom arch is installed and concrete is poured.
Furthermore, each group of the supports between the concrete filled steel tube support groups are connected through a plurality of connecting rods, and flexible compression blocks are arranged on the outer sides of the connecting rods at the inverted arch to give pressure.
Every two steel pipe concrete inverted arch are connected by connecting rods to form a group, the connecting rods can be connected with adjacent inverted arches to form an integral structure, and meanwhile, the inverted arches can be changed from long rods to short rods, so that the instability and the damage of the long rods are prevented, and the stability of the inverted arches is improved. The flexible compression block can achieve initial pressure relief.
Further, the concrete-filled steel tube support group comprises two concrete-filled steel tube supports.
Further, the steel pipe concrete support is concrete grouting inside the multi-section arc-shaped steel pipe, and the multi-section arc-shaped steel pipe support is connected through a steel pipe structure.
The construction of the multi-section steel pipe is convenient, and the steel pipe is directly grouted and formed after being assembled at present.
Further, the pressure relief belt is filled with sand, ballast, gangue or other bulk materials capable of being relieved.
Further, the flexible compression block material is foam plastic, rock wool, mineral wool or polyurethane.
Further, the concrete arch body is of a reinforced concrete structure.
Furthermore, the connecting rod is of a metal rod or a short concrete steel pipe structure and is fixedly inserted between the steel pipe concrete supports in a splicing mode or in a welding mode.
The utility model discloses the beneficial effect who produces is:
the concrete-filled steel tube inverted bottom arch and the concrete arch body can effectively ensure the supporting strength of the roadway bottom plate, thereby effectively controlling the deformation of the roadway surrounding rock; the pressure relief belt arranged between the supporting bodies can enable the broken surrounding rocks to be extruded from the pressure relief belt to achieve the purpose of yielding and relieving pressure, and reduce the load required to be borne by the supporting bodies. The repair frequency of the floor heave of the roadway can be reduced, and the labor intensity is reduced.
The bottom arch section semi-closed support body is characterized in that a roadway bottom plate is jointly supported by a steel pipe concrete inverted bottom arch and a concrete arch body, and the supporting strength of the roadway bottom plate can be ensured by the steel pipe concrete inverted bottom arch and the concrete arch body. Every two steel pipe concrete inverted arch are connected by connecting rods to form a group, the connecting rods can be connected with adjacent inverted arches to form an integral structure, and meanwhile, the inverted arches can be changed from long rods to short rods, so that the instability and the damage of the long rods are prevented, and the stability of the inverted arches is improved. And (5) installing the steel pipe concrete support inverted arch and pouring concrete, and then constructing the concrete arch body.
Drawings
FIG. 1 is a schematic view of a semi-closed bottom plate of the present application for supporting a pressed soft rock roadway;
FIG. 2 is a schematic view of a partial structure at the position of an inverted arch according to the present application;
FIG. 3 is a top plan view of FIG. 1 of the present application;
fig. 4 is a cross-sectional view I-I of fig. 3 of the present application.
1-steel pipe concrete support, 2-concrete arch body, 3-tunnel terrace, 4-flexible compression block, 5-connecting rod, 6-pressure relief band
Detailed Description
The following further describes the preferred embodiments of the present invention, which are merely illustrative of the present invention, and the technical solution of the present invention is not limited to the description of the embodiments.
As shown in fig. 2, a semi-closed bottom plate enables a pressed soft rock roadway supporting structure, wherein a bottom arch section of a supporting body constructed by the pressed soft rock roadway supporting structure is composed of the following parts, and the bottom arch section is a semi-closed supporting body; a flexible compression block 4; a pressure relief belt 6. The two sides and the top plate of the roadway are supported by a steel tube concrete support and a concrete arch body in a totally-enclosed way, and the supporting section is shown in figure 1.
Specifically, referring to fig. 1-4, the support comprises a concrete-filled steel tube support group and a concrete arch body 2, wherein the concrete-filled steel tube support group is formed by connecting at least two concrete-filled steel tube supports 1 into a whole, the concrete-filled steel tube support group is embedded in the periphery of the concrete arch body 2 in a half manner, and the concrete-filled steel tube support group and the concrete arch body form an integrated structure to support surrounding rocks of a roadway together; the part above the concrete arch body 2 terrace is continuously arranged along the roadway axis direction, and a fillable pressure relief belt 6 is arranged between every two sets of steel pipe concrete bracket sets at the inverted bottom arch below the roadway terrace 3.
The roadway bottom plate is jointly loaded by the steel pipe concrete inverted bottom arch and the concrete arch body, the steel pipe concrete inverted bottom arch and the concrete arch body can ensure the supporting strength of the roadway bottom plate, and a pressure relief belt is reserved between the concrete arch bodies. When the roadway does not bulge, the pressure relief belt can be used as a bottom plate for bearing. When tunnel country rock pressure is great, the country rock is extruded from bottom plate pressure release area, and the pressure release area is bloated, and the unnecessary pressure release bulk cargo of workman's clearance can guarantee tunnel normal use. When the roadway surrounding rock is extruded from the pressure relief belt more, the extruded surrounding rock is broken, the porosity is high, the roadway surrounding rock can be cleaned without a rock breaking process, and the labor intensity is reduced.
Specifically, referring to fig. 2, the concrete arch body 2 has a closed structure above the terrace and a semi-closed structure below the terrace.
The tunnel bottom plate is jointly supported by the steel pipe concrete inverted bottom arch and the concrete arch body, the support strength of the tunnel bottom plate can be guaranteed by the steel pipe concrete inverted bottom arch and the concrete arch body is constructed after the steel pipe concrete support inverted bottom arch is installed and concrete is poured.
Specifically, referring to fig. 2, the supports between each concrete filled steel tube support group are connected through a plurality of connecting rods 5, and a flexible compression block 4 is arranged outside the connecting rods at the inverted bottom arch for yielding.
Every two steel pipe concrete inverted arch are connected by connecting rods to form a group, the connecting rods can be connected with adjacent inverted arches to form an integral structure, and meanwhile, the inverted arches can be changed from long rods to short rods, so that the instability and the damage of the long rods are prevented, and the stability of the inverted arches is improved. The flexible compression block can achieve initial pressure relief.
Specifically, referring to fig. 2 to 4, the concrete filled steel tube bracket set includes two concrete filled steel tube brackets 1.
Specifically, the concrete filled steel tube support 1 is concrete filled inside a multi-section arc-shaped steel tube, and the multi-section arc-shaped steel tube support is connected through a steel tube structure.
Specifically, the pressure relief belt is filled with sand, ballast, gangue or other bulk materials capable of relieving pressure.
Specifically, the flexible compression block 4 is made of foam plastic, rock wool, mineral wool or polyurethane.
Specifically, the concrete arch body 2 is a reinforced concrete structure.
Specifically, the connecting rod 5 is a metal rod or a short concrete steel pipe structure, and is inserted or welded and fixed between the steel pipe concrete supports.
The semi-closed bottom plate enables the pressure type soft rock roadway supporting structure to be constructed by the following method construction technology, and the technology is implemented by the following steps: after the inverted bottom arches of the concrete-filled steel tube supports are installed and concrete is poured, the two concrete-filled steel tube supports are connected together through a plurality of groups of connecting rods, four groups of connecting rods are used in total between the two inverted bottom arches, the flexible compression block is arranged behind the connecting rods, concrete arch bodies are constructed, pressure relief belts are reserved between the concrete arch bodies, and the pressure relief belts are filled with sand. The roadway bottom plate is jointly supported by the steel pipe concrete inverted bottom arch and the concrete arch body, and the steel pipe concrete inverted bottom arch and the concrete arch body can ensure the supporting strength of the roadway bottom plate.
As shown in figures 1-4, the tunnel bottom plate adopts a steel pipe concrete inverted bottom arch and a concrete arch body to jointly bear, and the two can ensure the supporting strength of the tunnel bottom plate. Every two steel pipe concrete inverted arch are connected by connecting rods to form a group, the connecting rods can be connected with adjacent inverted arches to form an integral structure, and meanwhile, the inverted arches can be changed from long rods to short rods, so that the instability and the damage of the long rods are prevented, and the stability of the inverted arches is improved. And after installing the steel pipe concrete support inverted arch and pouring concrete, constructing the concrete arch body, and leaving a pressure relief belt between the concrete arch bodies, wherein the pressure relief belt is filled with sand.
A foam plastic plate: as shown in figure 2, four groups of connecting rods are used between the two inverted arches, and a foam plastic plate is arranged behind the connecting rods for yielding.
Pressure relief belt: as shown in figure 2, every two inverted arches form a group, and sand is filled between the inverted arches of each group to be used as a pressure relief belt. When the roadway is not subjected to bottom heave, sand can be used as a bottom plate for bearing. When the pressure of surrounding rocks of the roadway is large, the surrounding rocks are extruded from the pressure relief belt of the bottom plate, sand is swelled, and the normal use of the roadway can be ensured by cleaning the excessive sand by workers. When the roadway surrounding rock is extruded from the pressure relief belt more, the extruded surrounding rock is broken, the porosity is high, the roadway surrounding rock can be cleaned without a rock breaking process, and the labor intensity is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that the embodiments can be modified and improved without departing from the principle and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents, and the modifications and improvements should be considered within the scope of the present invention.
Claims (9)
1. The utility model provides a semi-closed lets die mould soft rock tunnel bottom plate supporting construction which characterized in that: the concrete-filled steel tube support comprises a concrete-filled steel tube support group and a concrete arch body (2), wherein the concrete-filled steel tube support group is formed by connecting at least two concrete-filled steel tube supports (1) into a whole, the concrete-filled steel tube support group is arranged on the periphery of the concrete arch body (2) in a semi-embedded mode, and the concrete-filled steel tube support group and the concrete arch body form an integrated structure to support roadway surrounding rocks together; the part above the concrete arch body (2) terrace is continuously arranged along the axial direction of the roadway, and a fillable pressure relief belt (6) is arranged between every two sets of steel pipe concrete support groups at the inverted bottom arch below the roadway terrace (3).
2. The semi-enclosed pressure type soft rock roadway floor supporting structure according to claim 1, wherein: the concrete arch body (2) is of a closed structure above a terrace and of a semi-closed terrace structure below the terrace.
3. The semi-closed yielding type soft rock roadway floor supporting structure according to claim 1 or 2, wherein: and the supports between the concrete filled steel tube support groups in each group are connected through a plurality of connecting rods (5), and flexible compression blocks (4) are arranged outside the connecting rods at the inverted arch to give pressure.
4. The semi-enclosed pressure type soft rock roadway floor supporting structure according to claim 1, wherein: the concrete-filled steel tube support group comprises two concrete-filled steel tube supports (1).
5. The semi-closed pressure type soft rock roadway floor supporting structure according to claim 3, wherein: the concrete filled steel tube support (1) is formed by grouting concrete inside a multi-section arc-shaped steel tube, and the multi-section arc-shaped steel tube support is connected through a steel tube structure.
6. The semi-enclosed pressure type soft rock roadway floor supporting structure according to claim 1, wherein: the pressure relief belt (6) is filled with sand, ballast or gangue.
7. The semi-closed pressure type soft rock roadway floor supporting structure according to claim 3, wherein: the flexible compression block (4) is made of foam plastic, rock wool, mineral wool or polyurethane.
8. The semi-enclosed pressure type soft rock roadway floor supporting structure according to claim 1, wherein: the concrete arch body (2) is of a reinforced concrete structure.
9. The semi-closed pressure type soft rock roadway floor supporting structure according to claim 3, wherein: the connecting rods (5) are metal rods or short concrete steel pipe structures and are fixedly inserted between the steel pipe concrete supports in an inserting mode or in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020093925.6U CN212027806U (en) | 2020-01-16 | 2020-01-16 | Semi-closed pressure type soft rock roadway bottom plate supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020093925.6U CN212027806U (en) | 2020-01-16 | 2020-01-16 | Semi-closed pressure type soft rock roadway bottom plate supporting structure |
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| Publication Number | Publication Date |
|---|---|
| CN212027806U true CN212027806U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020093925.6U Expired - Fee Related CN212027806U (en) | 2020-01-16 | 2020-01-16 | Semi-closed pressure type soft rock roadway bottom plate supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006817A (en) * | 2021-05-08 | 2021-06-22 | 上海应用技术大学 | Upper and bottom combined supporting structure capable of yielding and construction method thereof |
-
2020
- 2020-01-16 CN CN202020093925.6U patent/CN212027806U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006817A (en) * | 2021-05-08 | 2021-06-22 | 上海应用技术大学 | Upper and bottom combined supporting structure capable of yielding and construction method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201127 Termination date: 20220116 |