CN211257064U - Retaining wall built on soft foundation - Google Patents
Retaining wall built on soft foundation Download PDFInfo
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- CN211257064U CN211257064U CN201921457982.1U CN201921457982U CN211257064U CN 211257064 U CN211257064 U CN 211257064U CN 201921457982 U CN201921457982 U CN 201921457982U CN 211257064 U CN211257064 U CN 211257064U
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Abstract
The utility model discloses a build barricade on soft basement, including wall body and cut groove, the cut groove is the cell body of digging in the basement and getting, the wall body is installed in the cut groove, and the wall body passes through stock and top rock, lateral rock and basement fixed connection, the inside reinforcing bar net that is equipped with of wall body, the wall body is equipped with the wash port that runs through wall body thickness. According to the scheme, the soft foundation is subjected to grooving treatment, the retaining wall is built in the soft foundation, the built retaining wall is stable in structure, and then bottom changing treatment is performed on the upper layer of the soft foundation, so that filling slurry in a to-be-filled area cannot leak from the bottom of the soft foundation on the outer side of a stope.
Description
Technical Field
The utility model belongs to the technical field of underground mining technique and specifically relates to a barricade of building on soft basement is related to.
Background
The construction of green circulation mine is advocated vigorously in the present country, for reducing the accumulation of earth's surface barren rock and control because the earth pressure activity that the exploitation arouses, in the underground metal mine, adopt the mode of filling afterwards to carry out the collecting space area to handle more. Before the goaf is treated, the lower part of the goaf needs to be plugged by a filling retaining wall, so that the flow of slurry is controlled, and the safety and stability of a stope filling process are realized.
At present, the retaining wall is mostly constructed in a stable ore rock area, reasonable retaining wall structure parameters can effectively ensure safe and stable filling, and a series of problems occur when the retaining wall is applied to a soft foundation. According to the application condition of the filling retaining wall at home and abroad, although the retaining wall has good stability, slurry is acted to a weak structure area under the action of water head pressure, a soft base is easily weakened to form a liquefaction area, the foundation at the lower part of the retaining wall is damaged, a slurry guide channel is formed, the slurry pressure is increased along with the increase of the height of the filling slurry, slurry leakage hazard is likely to occur at the later stage, and underground safety operation is seriously endangered.
Therefore, how to construct a filling retaining wall on a soft foundation is an urgent technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the method overcomes the defects of the prior art, and provides a retaining wall construction method built on a soft foundation, so that the retaining wall can be built on the soft foundation, and slurry leakage cannot occur in the later period.
The utility model provides a technical scheme that its technical problem adopted is: to provide a retaining wall constructed on a soft foundation, which is stable in structure and can withstand a liquid-like filling slurry.
The utility model discloses further solve the technical scheme that its technical problem adopted and be: the utility model provides a build barricade on soft basement, includes wall body and cut groove, the cut groove is the cell body of digging on the basement and getting, the wall body is installed in the cut groove, and the wall body passes through stock and top rock, side rock and basement fixed connection, the inside reinforcing bar net that is equipped with of wall body, the wall body is equipped with the wash port that runs through wall body thickness.
The retaining wall in the scheme is fixedly connected with the top rock, the side rock and the base by the anchor rods, so that the retaining wall is stable in structure; and the steel bar mesh is arranged in the retaining wall, so that the integral strength of the retaining wall can be ensured to be high; in addition, the retaining wall is provided with a drain hole which can drain the water in the filling slurry to enable the filling slurry to be solidified more quickly. In patent CN109723490A, a retaining wall with drainage holes is described, but the retaining wall uses ceramsite concrete with certain water permeability, and when the ceramsite concrete meets liquid filling slurry, local slurry leakage may occur, and when the ceramsite concrete meets the liquid filling slurry, a large area of slurry leakage may occur on a soft substrate, which causes safety accidents.
Furthermore, a dewatering pipe is arranged in the drain hole. The filtered water is discharged through a pipe.
Further, digging a substrate on one side far away from the dewatering pipe, and arranging a covering layer on the dug substrate. In this embodiment, keep away from the basement direction of dehydration pipe one side for the stope outside, with the stope outside corresponding be the stope inboard, the stope is inboard in the utility model discloses in for waiting to fill the region, utilize the barricade to separate the stope inboard with the stope outside, the barricade will wait to fill the region and form upper portion open-ended confined space, fill ground paste from upper portion down put into wait to fill the region, will wait to fill the region and fill finally. In this embodiment, the foundation outside the stope is also dug, and a covering layer is laid to form a part of the retaining wall, so that the liquid filling slurry can enter the area to be filled and cannot leak out from the foundation outside the stope.
Further, the depth of the notch groove is the same as the thickness of the covering layer.
Further, the covering layer is a concrete layer or a reinforced concrete layer.
Further, a pedestrian window is arranged on the retaining wall.
A method of constructing a retaining wall constructed on a soft foundation, comprising the steps of:
firstly, observing the development condition of a mineral rock joint crack on site, and selecting a retaining wall construction area;
secondly, fixing retaining wall fixing anchor rods on side rocks and top rocks of a retaining wall construction area, wherein the retaining wall fixing anchor rods are used for subsequently fixing retaining walls;
thirdly, digging a soft foundation below a retaining wall construction area to form a notch;
fourthly, arranging baffles on two sides of the notch groove, wherein the baffles are arranged oppositely, reserving a position of a retaining wall in the middle, pouring a covering material to the reserved retaining wall position, and pouring layer by layer to form the retaining wall;
fifthly, removing the baffle after the covering material at the retaining wall is solidified;
and sixthly, digging a distance from the soft substrate on the outer side of the stope, and pouring the covering material on the dug soft substrate on the outer side of the stope to form a covering layer.
Further, in the third step, the depth of the soft foundation is dug to be consistent with the thickness of the retaining wall.
Furthermore, in the fourth step, a reinforcing mesh is arranged between the baffles.
Further, in the sixth step, a covering layer fixing anchor rod is connected between the covering layer and the soft substrate on the outer side of the stope, and steel wires are bound between the covering layer fixing anchor rods to form a steel wire mesh.
Further, the covering material is concrete.
The utility model has the advantages that:
the utility model discloses in earlier carry out the grooving to the soft basement and handle, build the barricade in the soft basement, barricade stable in structure after the construction, again to the soft basement on the stope outside trade the end and handle, prevent that follow-up pouring to the stope inboard fills ground paste, fills ground paste can leak out from the soft basement bottom in the stope outside. The retaining wall in the scheme is fixedly connected with the top rock, the side rock and the base by the anchor rods, so that the retaining wall is stable in structure and can resist the pressure of filling slurry on the retaining wall; and the steel bar mesh is arranged in the retaining wall, so that the integral strength of the retaining wall can be ensured to be high; in addition, the retaining wall is provided with a drain hole which can drain the water in the filling slurry to enable the filling slurry to be solidified more quickly.
Drawings
FIG. 1 is a schematic sectional view of the front view of the present embodiment;
fig. 2 is a schematic cross-sectional view of the left side of the present embodiment.
In the figure: 1-retaining wall fixing anchor rod, 2-retaining wall internal reinforcing mesh, 3-grooving, 4-pedestrian window, 5-drainage hole, 6-soft substrate, 7-ore rock, 8-mold bag, 9-concrete, 10-covering layer fixing anchor rod, 11-covering layer reinforcing mesh and 12-dewatering pipe.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1: the utility model provides a build barricade on soft basement, includes wall body and cut groove, the cut groove is the cell body of digging on the basement and getting, the wall body is installed in the cut groove, and the wall body passes through stock and top rock, side rock and basement fixed connection, the inside reinforcing bar net that is equipped with of wall body, the wall body is equipped with the wash port that runs through wall body thickness.
Analyzing and calculating the stress condition of the retaining wall according to the size of the retaining wall to be constructed and the characteristics of the filling slurry, wherein the filling slurry undergoes three processes of sedimentation, dehydration and coagulation hardening in the filling process according to hydromechanicsThe theory shows that the acting force on the retaining wall is maximum in the liquid state, and the condition parameters of mechanical analysis are assumed that the retaining wall specification is (W × H), the filling height is H, and the specific gravity gamma of the filling slurry isLiquid for treating urinary tract infectionTotal pressure P, and vertical bending moment of filled retaining wall is M, then
Calculating the steel bar mesh degree parameter according to the stress condition by a rectangular normal section bearing capacity steel bar calculation method;
and (4) according to the horizontal force of the filling body to the retaining wall, the static friction force of the base of the retaining wall and the shearing resistance of the anchor rods are borne, and the number of the anchor rods is calculated.
In the implementation, the position for building the retaining wall is determined in advance in the area to be filled, and is defined as a pre-cast retaining wall area, a notch groove is dug at the bottom surface of the pre-cast retaining wall, and the width of the notch groove is the thickness of the retaining wall. The method comprises the steps that ore rocks 7 are distributed in a region to be filled, the ore rocks can be divided into top rocks, side rocks and low rocks according to positions, anchor rod holes are drilled in the top rocks and the side rocks of a pre-cast retaining wall region, from the viewpoint of the thickness of the retaining wall, the anchor rod holes are located in the middle of the thickness direction of the pre-cast retaining wall region, anchor rods are inserted into the anchor rod holes, the anchor rods are defined as retaining wall fixing anchor rods 1, one part of the retaining wall fixing anchor rods are inserted into the top rocks and the side rocks, and the other part of the retaining wall fixing anchor rods are arranged on the outer sides. And (3) digging an anchor rod hole on the bottom surface of the pre-cast retaining wall area, wherein the anchor rod hole is also positioned in the middle of the pre-cast retaining wall area, and a retaining wall fixing anchor rod 1 is also inserted into the anchor rod hole. The theoretical number of the retaining wall fixing anchor rods can be obtained through calculation, the actual number of the retaining wall fixing anchor rods can be equal to or exceed the theoretical number, and the retaining wall fixing anchor rods are resin anchor rods. Reinforcing steel bars are tied on the retaining wall fixing anchor rods in the four directions to form a retaining wall internal reinforcing mesh 2.
In this embodiment, a notch 3 is dug on the soft substrate 6, first baffles are arranged on two sides of the notch 3, the first baffles are arranged oppositely, and a space with the thickness of the retaining wall is reserved in the middle.
The slurry has the same effect on the same height level, so the excavation depth is consistent with the thickness of the retaining wall, the excavated waste can be directly stacked to the inner surface of the retaining wall, and the slurry can be blocked to a certain extent in the filling process.
And (3) casting concrete 9 in a segmented manner in the space between the first baffles, wherein the casting height is 20cm at one time, after the concrete is solidified, performing second casting, and casting 20cm at the same time until the concrete is finally cast to be in contact with the top rock. And after the concrete is completely solidified, removing the baffle, and pouring the concrete at the top of the retaining wall to enable the retaining wall to be tightly attached to the top rock and the side rock. Finally, the reinforcing mesh is positioned in the middle of the interior of the retaining wall, so that the strength of the retaining wall is increased, and the compression resistance and bending resistance of the retaining wall are improved; through the fixed stock of barricade for the barricade becomes integrative with the equal fixed connection of top rock, side rock and basement, has strengthened the degree of steadiness of barricade greatly. In addition, adopt segmental concreting, be in order to prevent once too much concreting, lead to the concrete outside to solidify and accomplish, inside concrete that does not solidify still, accomplish the barricade preparation back at last, inside concrete solidifies the completion again, can make barricade and top rock or side rock appear the clearance, influence the subsequent use of barricade.
In this embodiment, when the retaining wall is poured, four second retaining plates and the first retaining plate form a window for people to pass through, which is defined as a pedestrian window 4, and the first retaining plate and the second retaining plate can be made of wood plates. The design of pedestrian window 4 makes things convenient for constructor to come and go the stope inboard and the stope outside, makes things convenient for constructor to the observation of barricade at barricade two sides to and the later stage removes behind the first baffle, to the repair of barricade both sides. When the retaining wall is finished, the pedestrian window can be repaired by concrete, so that slurry leakage of the retaining wall is prevented.
In the embodiment, a plurality of drain holes 5 are formed in the retaining wall, the number of the drain holes is not too large, and the too large drain holes can affect the strength of the retaining wall. The retaining wall is generally provided with four drain holes, one drain hole is arranged at the middle lower part of the retaining wall and is defined as a lower drain hole, and the lower drain hole is arranged at the middle position of the retaining wall; two drain holes are formed in the middle of the retaining wall, and are defined as middle drain holes, and the middle drain holes are formed in two sides of the lower drain holes; a drainage hole is formed in the lower portion of the retaining wall and is defined as an upper drainage hole, and the upper drainage hole is formed in the middle of the middle drainage hole and can be located right above the lower drainage hole. The drain hole is arranged to discharge water in the filling slurry along with the drain hole when the filling slurry is filled in the area to be poured, so that the filling slurry is solidified and filled more quickly.
And a dewatering pipe 12 is also arranged in the drainage hole, one end of the dewatering pipe 12 is inserted into the drainage hole and is defined as a water outlet, the other end of the dewatering pipe 12 is a water inlet, and the water outlet is positioned at the outer side of the stope and discharges the water of the filling slurry at the inner side of the stope. Further, in order that the dewatering pipe does not discharge the filling slurry, a filter screen may be installed on one side of the dewatering pipe located in the area to be poured.
In this embodiment, the soft foundation of the retaining wall in the stope outside direction is also excavated, the downward excavation being of a size consistent with the depth of the cut. And (3) forming an anchor rod hole on the excavated substrate, and inserting a covering layer fixing anchor rod 10, wherein the covering layer fixing anchor rod is a resin anchor rod. And binding steel bars on the covering layer fixing anchor rods to form a covering layer steel bar mesh 11, and pouring concrete 9 into the covering layer steel bar mesh 11 to finally form the reinforced concrete covering layer.
The covering layer becomes a part of the retaining wall, so that when liquid filling slurry enters the area to be filled, the filling slurry cannot leak out from the bottom of the base outside the stope due to the arrangement of the covering layer. The reinforced concrete covering layer is fixedly connected with the soft substrate through the use of the covering layer fixing anchor rod, so that the strength of the reinforced concrete covering layer is enhanced.
And paving a mold bag 8 on the corner of the covering layer, filling the mold bag 8 with filling slurry, and filling the area to be filled after the filling slurry in the mold bag is solidified. The overburden is further treated to prevent the fill slurry in the area to be filled from escaping from the junction of the overburden and the rock. The moulded bag is a bag-shaped product made of a double-layer polymerized fiber synthetic material.
A method of constructing a retaining wall on a soft foundation comprising the steps of:
firstly, observing the development condition of a mineral rock joint crack on site, and selecting a retaining wall construction area;
secondly, fixing anchor rods on side rocks and top rocks of a retaining wall construction area, wherein the anchor rods are used for subsequently fixing the retaining wall;
thirdly, digging a soft foundation below a retaining wall construction area to form a notch;
fourthly, arranging baffles on two sides of the notch groove, wherein the baffles are arranged oppositely, reserving a position of a retaining wall in the middle, pouring a covering material to the reserved retaining wall position, and pouring layer by layer to form the retaining wall;
fifthly, removing the baffle after the covering material at the retaining wall is solidified;
sixthly, digging a distance from the soft substrate on the outer side of the stope, and fixing an anchor rod on the dug soft substrate;
and seventhly, pouring a covering material on the substrate on the outer side of the excavated stope to form a covering layer.
Claims (6)
1. A retaining wall constructed on a soft foundation, comprising: the wall body is arranged in the notch groove, the wall body is fixedly connected with a top rock, a side rock and the substrate through anchor rods, a reinforcing mesh is arranged inside the wall body, and the wall body is provided with a drain hole penetrating through the thickness of the wall body.
2. A retaining wall constructed on a soft foundation as claimed in claim 1, wherein: and a dewatering pipe is arranged in the drain hole.
3. A retaining wall constructed on a soft foundation as claimed in claim 2, wherein: digging a substrate on one side far away from the dewatering pipe, and arranging a covering layer on the dug substrate.
4. A retaining wall constructed on a soft foundation as claimed in claim 3, wherein: the depth of the notch groove is the same as the thickness of the covering layer.
5. A retaining wall constructed on a soft foundation as claimed in claim 3 or 4, wherein: the covering layer is a concrete layer or a reinforced concrete layer.
6. A retaining wall constructed on a soft foundation as claimed in claim 1, wherein: and a pedestrian window is arranged on the retaining wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457982.1U CN211257064U (en) | 2019-09-04 | 2019-09-04 | Retaining wall built on soft foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921457982.1U CN211257064U (en) | 2019-09-04 | 2019-09-04 | Retaining wall built on soft foundation |
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| CN211257064U true CN211257064U (en) | 2020-08-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453723A (en) * | 2019-09-04 | 2019-11-15 | 临沂会宝岭铁矿有限公司 | A kind of barricade and construction method being built in soft substrate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453723A (en) * | 2019-09-04 | 2019-11-15 | 临沂会宝岭铁矿有限公司 | A kind of barricade and construction method being built in soft substrate |
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