CN107178391A - A kind of construction method of armored concrete fire dam and application - Google Patents

Abstract

The invention discloses a construction method and application of a reinforced concrete airtight wall, which comprises the steps of making vertical formwork holes and laying reinforcement holes; reinforcement; vertical formwork; installing drainage pipes; building cement brick walls and plastering; setting wall supports, etc. The method can be used for the construction of the airtight wall when the goaf is filled in the downward horizontal layered approach type cemented filling mining method. The raw materials for constructing the airtight wall in the present invention are commonly used building materials, and no special processing is required, the construction process is simple, the professional skills of the construction personnel are not high, and the operability is strong. The construction of the airtight wall can be completed within hours (excluding the hollow brick roofing), which solves the current problems of laborious and time-consuming construction of the airtight wall, poor safety and reliability, high economic cost, and the inability to quickly and effectively contain the spread of sudden accidents.

Description

Construction method and application of a reinforced concrete airtight wall

technical field

The invention relates to the technical field of mine safety construction, in particular to a construction method and application of a reinforced concrete airtight wall.

Background technique

Due to the advantages of safe operation, small ore loss, delay or even prevention of engineering geological disasters such as surface subsidence and deep rockburst, filling mining method is more and more used in actual mine production. In the filling mining process, the construction of the filling retaining wall is an important preparatory work that must be completed before filling. The construction quality of filling retaining wall directly affects the efficiency, cost and filling quality of filling operation. Due to improper construction of the retaining wall in some mines, problems such as slurry running and sand leakage often occurred during the filling process, and serious accidents such as the overall collapse of the retaining wall occurred, resulting in underground environmental pollution and difficulties in handling sand leakage. In order to improve the safety of the filling retaining wall, some mines increase the thickness of the retaining wall, resulting in increased consumption of filling materials and longer construction time, which in turn leads to low efficiency of mining and filling operations. Therefore, simplifying the construction process of the filling retaining wall and designing a suitable retaining wall structure and size can reduce mine filling costs, improve mining and filling efficiency and filling quality, and then improve the safety and economic benefits of mine production.

Contents of the invention

The object of the present invention is to provide a simple and efficient construction method for reinforced concrete airtight walls, so as to solve the above-mentioned problems in the prior art.

In order to solve the above problems, the present invention adopts the following technical solutions:

The invention provides a construction method for a reinforced concrete airtight wall, comprising the steps of:

Step 1: Drill holes for vertical formwork and fabric reinforcement

Drill vertical formwork holes on both sides of the airtight wall to be poured, each side is divided into multiple rows from bottom to top, each row has two vertical formwork holes on the same plane, and forms two columns of holes in the vertical direction, finally The lower row is 0.3m away from the bottom plate of the pouring position, the vertical distance between the vertical formwork holes is 0.9-1.1m, and the rib holes are arranged in the middle of the two rows of vertical formwork holes on both sides of the side, and the two sides are set at equal intervals of 60- 80cm reinforcement hole, and the bottommost reinforcement hole is 0.3m away from the bottom plate of the pouring position, wherein the hole depth of the vertical formwork is 50-70cm, and the depth of the reinforcement hole is 70-90cm;

Step 2: Reinforcement

Insert rebars into the reinforcement holes on both side sides, and fix the intersecting parts with iron wires, then arrange vertical rebars at equal intervals on one side of rebars at intervals of 25-35 cm, and fix the rebars and rebars with iron wires;

Step 3: Formwork

Insert threaded steel into the first and second rows of vertical formwork holes at the bottom of both sides of the sides, and put long hollow steel pipes on the rebars of both side sides, and fix the intersection of two long hollow steel pipes in the same row with iron wire. Then vertically fix the long hollow steel pipes at intervals of 60-70cm inside the long hollow steel pipes to form a vertical formwork frame, and then stack the formwork horizontally from bottom to top inside the vertical formwork frame to the height of the second row of vertical formwork holes. Install steel bars vertically at equal intervals of 75-85cm, and fix the steel bars on long hollow steel pipes with iron wires to press and fix the formwork, pour the mixed concrete into the formwork, pave and compact it to the height of the formwork, and then place Insert threaded steel and long hollow steel pipes into the upper row of vertical formwork holes and fix them with iron wires, continue to stack the formwork and pour concrete until the distance from the top plate is 55-65cm, and complete the vertical formwork;

Step 4: Drain Pipe

In the process of erecting the formwork, a drain pipe is set in the middle of the bottom plate, a second drain pipe is set at a distance of 1.7-1.9m from the bottom plate, a third drain pipe is set at a distance of 2.6-2.8m from the bottom plate, and then every 18- A drainage pipe is buried at a vertical interval of 22cm;

Step 5: Laying cement brick walls and plastering

After the formwork is removed, cement brick walls are built, and hollow bricks are used to build the roof, and observation holes are reserved in the middle; the hollow brick walls should be plastered to ensure that the filling process does not run out of slurry;

Step 6: Setting Up Wall Braces

Take six wall braces, set three vertical braces vertically and equidistantly, place a horizontal brace in the middle, and make the two sides of the horizontal brace against the vertical braces on both sides, and finally place a punch at the intersection of the horizontal braces and vertical braces on both sides. A diagonal brace.

As the present invention's optimization of the above-mentioned technical scheme, in the step 1, the vertical mold holes are divided into three rows from bottom to top, the hole depth is 60cm, the rib hole is 80cm deep, the upper and lower hole spacing of the vertical mold holes is 1m, and the two columns of vertical mold holes are horizontal The spacing is 40-60cm, and there are five rib holes on each side from bottom to top, and the spacing between the upper and lower holes is 70cm.

As the present invention's optimization of the above technical solution, in the step 2, the formwork is laid from the sides to the middle, so that there is no gap at the joint between the formwork and the sideways. If there is a gap in the middle of the formwork, a vertical formwork is laid at the gap to fill the gap. .

As the present invention's optimization of the above-mentioned technical solution, in the step 2, after the mold is set up, it is cured for 36 hours.

As a preferred embodiment of the above solution in the present invention, the wall support in step 6 is dry pine wood.

The present invention also provides the application of the construction method of the reinforced concrete airtight wall, which is used for the construction of the airtight wall when filling the goaf with the downward horizontal layering approach type cemented filling mining method.

The beneficial effects of the present invention are:

1) The raw materials for constructing the airtight wall are commonly used building materials and do not require special processing. The steel bars, cement, iron wire, hollow bricks and wood used in this scheme are materials commonly used in mine mining operations and support processes, and their sources are extensive. The cost is relatively low and can be effectively controlled;

(2) The construction process is simple, and the professional skills of the construction personnel are not high. In addition to drilling vertical formwork holes and reinforcement holes, professional rock drill operators are required, and ordinary workers can also perform other steps as long as they operate according to the job requirements;

(3) Less construction workers are required and the efficiency is high. As long as the vertical formwork holes and reinforcement holes are pre-drilled, and the materials used are transported to the site, 2 workers can complete the construction of the closed wall within 8 hours (excluding hollow bricks) build roof).

(4) Strong operability, no special mechanical construction equipment is required, and when the shape and size of the void section change, the construction scheme and materials used above can also be used by properly adjusting the construction process parameters.

Description of drawings

Fig. 1 is the vertical formwork frame structural representation of reinforced concrete airtight wall described in embodiment 1;

Fig. 2 is the cross-sectional reinforcement schematic diagram of the reinforced concrete airtight wall described in embodiment 1;

Fig. 3 is the wall support structure schematic diagram of the reinforced concrete airtight wall described in embodiment 1;

Among them, 1—vertical hole, 2—rebar, 3—long hollow steel pipe, 4—steel bar, 5—side support, 6—reinforcing hole, 7—drainage pipe, 8—concrete, 9—hollow brick, 10—vertical support , 11—horizontal brace, 12—diagonal brace.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

The material specifications used in the embodiment are: formwork (long 2m, wide 10-20cm, thick 2.5cm and 5cm some), diameter 28mm rebar (1.5m, 3m), diameter 12mm steel bar (3m), 2 cun long Hollow steel pipe (3m, 3.5m), No. 8 iron wire (coarse), No. 14 iron wire (thin), several hollow bricks with specifications of 400mm×200mm×200mm, 3 packs of 42.5# ordinary Portland cement, 6 dry pine wall supports (long 4m diameter 15cm-30cm)

Example 1

A construction method for a reinforced concrete airtight wall, comprising the steps of:

Step 1: Drill vertical formwork hole 1, fabric reinforcement hole 6

As shown in Fig. 1 and Fig. 2, the vertical mold holes 1 are drilled on the side walls 5 on both sides of the airtight wall to be poured, and each side is divided into three rows from bottom to top, and each row has two vertical mold holes 1 on the same plane. And form two rows of holes in the vertical direction, the horizontal distance between the two rows of vertical mold holes 1 is 50cm, the bottom row is 0.3m away from the bottom plate of the pouring position, and the vertical distance between each row of vertical mold holes 1 is 1m. Rib holes 6 are arranged in the middle of the two rows of vertical formwork holes 1 on both sides, and five rib holes 4 with an equal distance of 70 cm are arranged on both sides from bottom to top, and the bottom rib holes 6 are 0.3m away from the bottom plate of the pouring position, and the The depth of hole 1 of vertical formwork is 60cm, and the depth of hole 6 of rib is 80cm;

Step 2: Reinforcement

As shown in Figure 2, 3m rebar 2 is inserted in the rib holes 6 of both side sides 5, and the intersecting part is fixed with No. Steel bar 4 and threaded steel 2 are fixed by No. 1 iron wire;

Step 3: Formwork

Insert the threaded steel 2 of 1.5m in the bottom first and second rows of vertical mold holes 1 on both sides of the side rail 5, and cover the long hollow steel pipe 3 of 3m on the threaded steel 2 of the side rails 5 on both sides. The intersections of the root-length hollow steel pipes 3 are fixed with iron wires, and then 3.5m long hollow steel pipes 3 are vertically fixed at intervals of 65cm inside the 3m-long hollow steel pipes 3 to form a formwork frame, and then the formwork is placed inside the formwork frame from bottom to top Stack horizontally to the height of the second row of vertical formwork holes 1, set steel bars 4 vertically at equal intervals of 80cm inside the formwork, and fix the steel bars 4 on the long hollow steel pipe 3 with No. 8 iron wire to press and fix the formwork, and stir The good concrete 10 is poured into the formwork, paved and compacted to the height of the formwork, and then the upper row of vertical formwork holes 1 are also inserted into the threaded steel 2 and the long hollow steel pipe 3 and fixed with No. 8 iron wires, and the formwork is continued until At a distance of 60cm from the top plate, the vertical mold is completed;

Step 4: Drain Pipe

In the process of erecting the formwork, a drainpipe 7 is set in the middle of the bottom plate, the second drainpipe 7 is set at 1.8m from the bottom plate, the third drainpipe 7 is set at 2.7m from the bottom plate, and then every 20cm vertical Buried a drainage pipe 7 at intervals;

Step 5: Laying cement brick walls and plastering

After removing the formwork, build a cement brick wall, and use hollow bricks 9 to build and seal the roof, and reserve an observation hole in the middle; the hollow brick wall surface should be plastered to ensure that the filling process does not run out of slurry;

Step 6: Setting Up Wall Braces

As shown in Figure 3, take six wall braces, set three vertical braces 10 vertically and equidistantly, place a horizontal brace 11 horizontally in the middle, and make the two sides of the horizontal brace 11 resist the vertical braces 10 on both sides, and finally place a horizontal brace 11 on both sides. The intersecting position of support 11 and vertical support 10 makes a diagonal support 12 respectively.

Example 2

A construction method for a reinforced concrete airtight wall, comprising the steps of:

Step 1: Drill holes for vertical formwork and fabric reinforcement

Drill vertical formwork holes on both sides of the airtight wall to be poured, each side is divided into three rows from bottom to top, each row has two vertical formwork holes on the same plane, and forms two columns of holes in the vertical direction, two The horizontal distance between the vertical formwork holes in a row is 40cm, and the bottom row is 0.3m away from the bottom plate of the pouring position. Five rib holes with an equal distance of 60cm are set on both sides from bottom to top, and the bottom rib hole is 0.3m away from the bottom plate of the pouring position, and the hole depth of the vertical formwork is 50cm, and the depth of the hole hole is 70cm;

Step 2: Reinforcement

Insert 3m of rebar into the reinforcement holes of both side sides, fix the intersecting part with No. 8 iron wire, then arrange the rebar vertically at equal intervals on one side of the rebar at a distance of 25cm, and fix the rebar and rebar with No. 8 iron wire ;

Step 3: Formwork

Insert 1.5m of rebar into the first and second rows of vertical mold holes at the bottom of both sides of the sides, and put 3m long hollow steel pipes on the rebars of both side sides, at the intersection of two long hollow steel pipes in the same row Fix it with iron wire, and then vertically fix 3.5m long hollow steel pipes every 60cm inside the 3m long hollow steel pipes to form the vertical formwork frame, and then stack the formwork horizontally from bottom to top to the second row of vertical formwork frames inside the vertical formwork frame. At the height of the mold hole, vertically set steel bars at equal intervals of 75cm inside the formwork, and fix the steel bars on the long hollow steel pipe with No. Then insert threaded steel and long hollow steel pipes into the upper row of vertical formwork holes and fix them with No. 8 iron wire. Continue to stack the formwork until it is 55cm away from the top plate to complete the vertical formwork;

Step 4: Drain Pipe

In the process of erecting the formwork, a drain pipe is set in the middle of the base plate, a second drain pipe is set at a distance of 1.7m from the base plate, a third drain pipe is set at a distance of 2.6m from the base plate, and then a drain pipe is buried every 18cm vertical interval. root drainage pipe;

Step 5: Laying cement brick walls and plastering

After the formwork is removed, cement brick walls are built, and hollow bricks are used to build the roof, and observation holes are reserved in the middle; the hollow brick walls should be plastered to ensure that the filling process does not run out of slurry;

Step 6: Setting Up Wall Braces

Take six wall braces, set three vertical braces vertically and equidistantly, place a horizontal brace in the middle, and make the two sides of the horizontal brace against the vertical braces on both sides, and finally place a punch at the intersection of the horizontal braces and vertical braces on both sides. A diagonal brace.

Example 3

A construction method for a reinforced concrete airtight wall, comprising the steps of:

Step 1: Drill holes for vertical formwork and fabric reinforcement

Drill vertical formwork holes on both sides of the airtight wall to be poured, each side is divided into three rows from bottom to top, each row has two vertical formwork holes on the same plane, and forms two columns of holes in the vertical direction, two The horizontal distance between the vertical formwork holes in the row is 60cm, the bottom row is 0.3m away from the bottom plate of the pouring position, the vertical distance between each row of vertical formwork holes is 1.1m, and the reinforcement holes are arranged in the middle of the two columns of vertical formwork holes on both sides of the side. Five rib holes with an equal distance of 80cm are set on both sides from bottom to top, and the bottom rib hole is 0.3m away from the bottom plate of the pouring position, and the hole depth of the vertical formwork is 70cm, and the depth of the hole hole is 90cm;

Step 2: Reinforcement

Insert 3m of rebar into the rib holes on both side sides, fix the intersecting part with No. 8 iron wire, then arrange the rebar vertically at equal intervals on one side of the rebar at a distance of 35cm, and fix the rebar and rebar with No. 8 iron wire ;

Step 3: Formwork

Insert 1.5m of rebar into the first and second rows of vertical mold holes at the bottom of both sides of the sides, and put 3m long hollow steel pipes on the rebars of both side sides, at the intersection of two long hollow steel pipes in the same row Fix it with iron wire, and then vertically fix 3.5m long hollow steel pipes at intervals of 70cm inside the 3m long hollow steel pipes to form the vertical formwork frame, and then stack the formwork horizontally from bottom to top to the second row of vertical formwork frames inside the vertical formwork frame. At the height of the mold hole, vertically set steel bars at equal intervals of 85cm inside the formwork, and fix the steel bars on the long hollow steel pipe with No. Then insert threaded steel and long hollow steel pipes into the upper row of vertical mold holes and fix them with No. 8 iron wire. Continue to stack the template until it is 65cm away from the top plate to complete the vertical mold;

Step 4: Drain Pipe

In the process of erecting the formwork, a drainage pipe is set in the middle of the bottom plate, a second drainage pipe is set at a distance of 1.9m from the bottom plate, a third drainage pipe is set at a distance of 2.8m from the bottom plate, and then a drainage pipe is buried every 22cm vertical interval. root drainage pipe;

Step 5: Laying cement brick walls and plastering

After the formwork is removed, cement brick walls are built, and hollow bricks are used to build the roof, and observation holes are reserved in the middle; the hollow brick walls should be plastered to ensure that the filling process does not run out of slurry;

Step 6: Setting Up Wall Braces

Take six wall braces, set three vertical braces vertically and equidistantly, place a horizontal brace in the middle, and make the two sides of the horizontal brace against the vertical braces on both sides, and finally place a punch at the intersection of the horizontal braces and vertical braces on both sides. A diagonal brace.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than as a limitation to the present invention, as long as within the scope of the spirit of the present invention, the above-described embodiments Changes and modifications will fall within the scope of the claims of the present invention.

Claims (6)

1. A construction method of reinforced concrete airtight wall, is characterized in that, comprises the steps: Step 1: Drill holes for vertical formwork and fabric reinforcement Drill vertical formwork holes on both sides of the airtight wall to be poured, each side is divided into multiple rows from bottom to top, each row has two vertical formwork holes on the same plane, and forms two columns of holes in the vertical direction, finally The lower row is 0.3m away from the bottom plate of the pouring position, the vertical distance between the vertical formwork holes is 0.9-1.1m, and the rib holes are arranged in the middle of the two rows of vertical formwork holes on both sides of the side, and the two sides are set at equal intervals of 60- 80cm reinforcement hole, and the bottommost reinforcement hole is 0.3m away from the bottom plate of the pouring position, wherein the hole depth of the vertical formwork is 50-70cm, and the depth of the reinforcement hole is 70-90cm; Step 2: Reinforcement Insert rebars into the reinforcement holes on both side sides, and fix the intersecting parts with iron wires, then arrange vertical rebars at equal intervals on one side of rebars at intervals of 25-35 cm, and fix the rebars and rebars with iron wires; Step 3: Formwork Insert threaded steel into the first and second rows of vertical formwork holes at the bottom of both sides of the sides, and put long hollow steel pipes on the rebars of both side sides, and fix the intersection of two long hollow steel pipes in the same row with iron wire. Then vertically fix the long hollow steel pipes at intervals of 60-70cm inside the long hollow steel pipes to form a vertical formwork frame, and then stack the formwork horizontally from bottom to top inside the vertical formwork frame to the height of the second row of vertical formwork holes. Install steel bars vertically at equal intervals of 75-85cm, and fix the steel bars on long hollow steel pipes with iron wires to press and fix the formwork, pour the mixed concrete into the formwork, pave and compact it to the height of the formwork, and then place Insert threaded steel and long hollow steel pipes into the upper row of vertical formwork holes and fix them with iron wires, continue to stack the formwork and pour concrete until the distance from the top plate is 55-65cm, and complete the vertical formwork; Step 4: Drain Pipe In the process of erecting the formwork, a drain pipe is set in the middle of the bottom plate, a second drain pipe is set at a distance of 1.7-1.9m from the bottom plate, a third drain pipe is set at a distance of 2.6-2.8m from the bottom plate, and then every 18- A drainage pipe is buried at a vertical interval of 22cm; Step 5: Laying cement brick walls and plastering After the formwork is removed, cement brick walls are built, and hollow bricks are used to build the roof, and observation holes are reserved in the middle; the hollow brick walls should be plastered to ensure that the filling process does not run out of slurry; Step 6: Setting Up Wall Braces Take six wall braces, set three vertical braces vertically and equidistantly, place a horizontal brace in the middle, and make the two sides of the horizontal brace against the vertical braces on both sides, and finally place a punch at the intersection of the horizontal braces and vertical braces on both sides. A diagonal brace. 2. the construction method of a kind of reinforced concrete airtight wall according to claim 1, is characterized in that, in described step 1, vertical formwork hole is divided into three rows from bottom to top, and hole depth 60cm, reinforcement hole hole depth 80cm, vertical formwork The distance between the upper and lower holes of the holes is 1m, the horizontal distance between the two rows of vertical mold holes is 40-60cm, and there are five reinforcement holes on each side from bottom to top, and the distance between the upper and lower holes is 70cm. 3. the construction method of a kind of reinforced concrete airtight wall according to claim 1, is characterized in that, in described step 3, formwork is laid toward the middle part by both side sides, so that there is no gap at the junction of formwork and side side, if formwork If there is a gap in the middle, lay a vertical template to fill the gap. 4. The construction method of a kind of reinforced concrete airtight wall according to claim 1, characterized in that, after the vertical formwork is completed in the step 3, curing is performed for 36 hours. 5. The construction method of a reinforced concrete airtight wall according to claim 1, characterized in that, the wall support in the step 6 is dry pine wood. 6. The application of the construction method of a kind of reinforced concrete airtight wall described in claim 1-5 is characterized in that, it is used for the construction of the airtight wall when filling the goaf with the downward horizontal layering approach type cemented filling mining method.