CN110808564A - Concrete cable trench construction technology - Google Patents

Abstract

The present invention relates to a concrete cable trench construction process, comprising the following steps: step S1: excavating a cable trench foundation trench, excavating drainage trenches on both sides of the cable trench foundation trench; step S2: pouring a concrete cushion; step S3: binding a wall Step S4: install two sets of side wall steel formwork on both sides of the concrete cushion, the side wall steel formwork includes an inner formwork and an outer formwork, a waterproof board is arranged between the inner and outer formwork, and the two side walls of the waterproof board are respectively A filling space for pouring concrete is reserved between the inner formwork and the outer formwork; step S5: concrete mixing and pouring to form a cable trench wall; step S6: removal of side wall steel formwork; step S7: concrete curing and protection; step S8 : Backfilling with earthwork; since the phenomenon of water seepage is easy to occur after earthwork is backfilled, the waterproof board is used to prevent seepage of the water outside the wall of the cable trench, which can effectively avoid the accumulation of water inside the cable trench and improve the stability of the cable working process.

Description

Concrete cable trench construction technology

technical field

The invention relates to the technical field of cable trenches, in particular to a construction technology for concrete cable trenches.

Background technique

Cable trenches are underground pipes for laying and replacing power or telecommunication cable facilities, and also the enclosure structure of the laid cable facilities. They are an indispensable infrastructure in power plants, substations, municipal engineering and large factories and mines; The concrete cable trench in the station has a large workload, and its construction quality will directly affect the overall image of the substation project.

The existing Chinese invention patent with the authorized publication number CN102758451A discloses a concrete cable trench construction technology, which includes the following steps: measuring and positioning, excavating trench earthwork; cushion concrete pouring and curing; steel bar binding; floor concrete pouring and curing; As well as the assembly of side wall steel formwork and the installation of pre-embedded parts; among them, the side wall steel formwork is provided with tie bolt holes, and the inner and outer steel formwork of the side wall is fixed with tie bolts to determine the distance between the steel formwork on both sides of the side wall. ;By using steel formwork to assemble and form the side wall, the steel formwork is tightly spliced and not easy to be deformed. The cable trench concrete is formed at one time. After the mold is removed, the trench wall is smooth and clean, the joints are smooth and no leakage, and the concrete surface quality of the cable trench wall can reach clean water. Concrete quality level, no secondary painting required.

However, there are the following defects in the above technical solution: because the cable trench is made of concrete, the formed cable trench has poor waterproofness and is easy to seep water, which leads to the accumulation of water inside the cable trench. Make the cable unsafe to use.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a concrete cable trench construction technology, which has the advantages of good anti-seepage effect, avoids water accumulation in the cable trench, and improves the stability of the cable working process.

The above-mentioned purpose of the present invention is achieved through the following technical solutions:

A concrete cable trench construction technology, comprising the following steps:

Step S1: According to the design requirements, excavate the cable trench foundation groove, and dig drainage trenches on both sides of the cable trench foundation trench. After excavation, the substrate should be drained in time, and should not be soaked in water or over-excavated. If it is over-excavated, it should be filled with gravel. to the base level;

Step S2: tamp the original soil of the base, the cable trench foundation groove and the crushed stone are accepted and qualified, put the cushion center line, side line and elevation, and pour the concrete cushion after draining the accumulated water;

Step S3: Lay out lines on the concrete cushion, and tie the wall reinforcement point by point;

Step S4: Install two sets of side wall steel formwork on both sides of the concrete cushion, the side wall steel formwork includes an inner formwork and an outer formwork, a waterproof board is arranged between the inner and outer formwork, and the two side walls of the waterproof board are respectively connected to the inner and outer formwork. A filling space for pouring concrete is reserved between the formwork and the outer formwork;

Step S5: concrete mixing and pouring to form a cable trench wall;

Step S6: Remove the side wall steel formwork;

Step S7: Concrete curing and protection, after the wall of the cable trench wall is plastered, cover and water for no less than 7 days;

Step S8: According to the design requirements, earthwork is backfilled and compacted.

By adopting the above technical solution, since the wall of the cable trench formed by concrete pouring has a certain water permeability, after the earthwork is backfilled, in the rainy season, the soil is prone to seepage. The wall penetrates into the inside of the cable trench wall. The waterproof board is an anti-seepage material made of high molecular polymer as the basic raw material. It has the characteristics of high strength, anti-corrosion, anti-aging and good anti-seepage performance. It can effectively avoid the accumulation of water inside the wall of the cable trench, improve the stability of the working process of the cable, and prolong the service life of the cable.

The present invention is further provided as follows: in the step S4, the waterproof plate, the inner formwork and the outer formwork are connected by anti-seepage tie bolts, the two ends of the anti-seepage tie bolts are threadedly connected with locking nuts, and the cable A through hole is formed in the ditch wall to be matched with the anti-seepage pull bolt, and the anti-seepage pull bolt is provided with a sealing plug for blocking both ends of the through hole.

By adopting the above technical solution, the setting of the anti-seepage tie bolts ensures the stable spacing between the inner formwork, the outer formwork and the waterproof board, and realizes that after the cable trench wall is poured, the waterproof board can be stably embedded in the cable trench Inside the wall, the firmness of the cable trench wall is strengthened; after the cable trench wall is formed, unscrew the lock nut and remove the formwork; after the earth is backfilled, the water in the soil is easy to pass from the outside of the cable trench wall, from the outside of the cable trench wall. One end of the through hole penetrates into the other end of the through hole, and then penetrates into the inside of the wall of the cable trench. Using sealing plugs to seal and seal both ends of the through hole, it can effectively prevent the water in the soil from seeping into the cable trench wall. Inside the body, so that the cable can work stably.

The present invention is further provided as follows: the anti-seepage double-pull bolt is provided with a cavity, and the sealing and plugging member comprises flexible graphite sealing rings threadedly connected with both ends of the anti-seepage double-pull bolt, and two relatively sliding In the cavity and the arc-shaped first abutting plate and a second abutting plate, one end of the flexible graphite sealing ring extends into the through hole, and the inner ring wall of the flexible graphite sealing ring is respectively provided with the first abutting plate. A pressing groove in which the plate and the second abutting plate are matched, the cavity is provided with a driving component that drives the first abutting plate and the second abutting plate to be inserted into the pressing groove, and the outer wall of the anti-seepage pull bolt is provided with An opening for the first abutting plate and the second abutting plate to pass through.

By adopting the above technical solution, the flexible graphite sealing ring is first rotated so that one end of the flexible graphite sealing ring is inserted into the through hole and the through hole is blocked. Since the flexible graphite sealing ring has the characteristics of high temperature resistance, corrosion resistance and wear resistance, the Sealing effect; secondly, rotate the locking nut and approach the flexible graphite sealing ring, so that one end of the flexible graphite sealing ring can be stably fixed in the through hole; Inserted into the groove, the outer ring wall of the flexible graphite sealing ring can be pressed against the inner walls of both ends of the through hole, filling the gap between the pull bolt and the inner wall of the through hole, and improving the stability of the flexible graphite sealing ring in the through hole It further strengthens the sealing effect, can effectively avoid the accumulation of water inside the wall of the cable trench, and improve the stability of the cable work.

The present invention is further provided as follows: the drive assembly includes a drive rod in the same direction as the anti-seepage anti-tension bolt, an abutment block connected with one end of the drive rod, a limit block arranged on the side wall of the bottom of the abutment block, and an anti-seepage block. The first support rod and the second support rod in the same radial direction of the seepage pull bolt, the sliders respectively connected with one end of the first support rod and the second support rod, and the two ends of the anti seepage pull bolt are rotatably connected to the walls respectively. The first support rod and the second support rod slide in the opening, and the end of the driving rod far away from the block extends out of the end wall of the anti-seepage pull bolt and is threadedly connected with the rotating nut, so The ends of the first support rod and the second support rod away from the slider are respectively connected with the first abutting plate and the second abutting plate, the slider slides along the radial direction of the anti-seepage pull bolt, and the inner edge of the cavity is The axial direction is provided with a limit groove for the limit block to slide, and the side walls of the slider and the abutment block are all set as inclined surfaces.

By adopting the above technical solution, when the rotating nut is rotated, the limit groove plays a limiting role on the sliding of the limiting block, and the rotating nut is threadedly connected with the driving rod, thereby driving the abutting block to slide in the direction of the slider; The side wall of the sliding block is set as an inclined surface. When the abutting block is sliding, due to the limit of the opening, the two opposite sliders are kept away from each other, and the first and second support rods pass through the opening, which can The first abutting plate and the second abutting plate are inserted into the abutting groove, so that the outer ring wall of the flexible graphite sealing ring can be pressed against the inner wall of the through hole, and the two ends of the through hole can be sealed.

In the present invention, the inner ring and the outer ring of the flexible graphite sealing ring are both trapezoidal in cross section, and the length dimension of the first support rod is smaller than the length dimension of the second support rod.

By adopting the above technical solution, the outer ring section of the flexible graphite sealing ring is trapezoidal, so that when the flexible graphite sealing ring is rotated, one end of the flexible graphite sealing ring can be quickly inserted into the through hole; the inner ring section of the flexible graphite sealing ring is It is trapezoidal, and the length dimension of the first support rod is smaller than the length dimension of the second support rod. The first abutting plate and the second abutting plate can be inserted into the abutting groove, which improves the adhesion of the outer ring wall of the flexible graphite sealing ring. The tightness inside the through hole has a good sealing effect.

The present invention further provides that: the first support rod and the second support rod are sleeved with a spring, one end of the spring is fixed on the inner wall of the cavity, and the other end of the spring is fixed on the side wall of the slider.

By adopting the above technical solution, the setting of the spring can limit the movement of the slider. When pouring the wall of the cable trench, the elastic force of the spring can be used to keep the first abutting plate and the second abutting plate away from the inner wall of the through hole. Prevent the first and second abutting plates from being bonded to the concrete; and before pouring concrete, protective mold sleeves can be set at both ends of the anti-seepage tie bolts to prevent the concrete slurry from infiltrating into the cavity through the opening and affecting the slippage. slippage of the block.

The present invention is further provided as follows: the outer ring wall of the flexible graphite sealing ring is fixed with a sealing ring plate, and the side wall of the sealing ring plate is provided with a water-swellable water stop strip which is attached to the side wall of the cable trench wall.

By adopting the above technical solution, since the soil is under pressure on both sides of the wall of the cable trench after the earth is backfilled, the sealing ring plate and the water-swelling water-stop strip can be closely attached to the side wall of the cable trench wall; When water seeps, the water-swelling water-stop strip expands and seals the gap between the sealing ring plate and the wall of the cable trench, further enhancing the sealing effect.

The present invention is further configured as follows: the step S2 further includes a step S21: a cobblestone sidewalk is laid in the middle of the concrete cushion, a drainage slope is provided on both sides of the cobblestone sidewalk, and the higher end of the drainage slope faces the cobblestone sidewalk, The lower end of the drainage slope faces the drainage ditch and is provided with a drainage hole, and the drainage hole is connected with a drainage pipe and extends into the drainage ditch.

By adopting the above technical solution, when water accumulates inside the wall of the cable trench, the setting of the drainage slope can divert the accumulated water, and then the accumulated water flows toward the drainage hole through the action of gravity. Finally, the accumulated water is drained into the drainage ditch in time through the drain pipe, which effectively avoids the accumulation of accumulated water in the wall of the cable trench, which affects the stability of the cable working process.

The present invention is further provided that: the inner wall and the outer wall of the cable trench wall are painted with cement-based permeable crystalline waterproof paint.

By adopting the above technical solutions, the cement-based permeable crystalline waterproof coating has the characteristics of self-healing performance, non-toxicity, environmental protection, anti-corrosion, acid and alkali resistance, strong penetration ability, etc. It can penetrate into the concrete through chemical reaction to generate crystals and block The capillary pores of the concrete are trapped, and when there is water seepage, the wall of the cable trench can be waterproofed from the source, which further strengthens the anti-seepage effect and improves the stability of the cable working process.

The present invention further provides that: the distance between the inner template, the outer template and the side wall of the waterproof board is 8-10 cm.

By adopting the above technical solution, the distance between the two sides of the waterproof board and the inner and outer formwork is 8-10cm, and the wall size of the cable trench wall is 16-20cm, which is strong.

To sum up, the beneficial technical effects of the present invention are:

1. The waterproof board has a good anti-seepage effect, which can prevent the seepage water from penetrating into the inside of the cable trench through the cable trench wall, which plays a role of barrier and can effectively avoid water accumulation inside the cable trench wall. Improve the stability of the working process of the cable and prolong the service life of the cable;

2. The use of anti-seepage pull bolts ensures a stable distance between the inner formwork, the outer formwork and the waterproof board. After the cable trench wall is poured, the waterproof board is stably embedded in the cable trench wall, strengthening the cable The firmness of the ditch wall; after the cable ditch wall is formed, unscrew the lock nut and remove the formwork; after the earthwork is backfilled, in order to prevent the water in the soil from penetrating into the cable ditch wall, the sealing plug is used to prevent Seal both ends of the through hole to effectively prevent water accumulation inside the wall of the cable trench, so that the cable can work stably;

3. When water accumulates inside the wall of the cable trench, the setting of the drainage slope will divert the accumulated water, and then the accumulated water will flow in the direction of the drainage hole through the action of gravity, and finally the accumulated water will pass through. The drainage pipe is drained into the drainage ditch in time to effectively avoid accumulation of water in the wall of the cable ditch, which affects the stability of the cable working process.

Description of drawings

FIG. 1 is a schematic diagram of the overall cross-sectional structure of this embodiment.

FIG. 2 is an enlarged schematic diagram for embodying part A in FIG. 1 .

FIG. 3 is an enlarged structural schematic diagram for showing part B in FIG. 2 .

Reference signs: 1. Cable trench foundation groove; 2. Drainage trench; 3. Concrete cushion; 4. Side wall steel formwork; 41. Inner formwork; 42. Outer formwork; 5. Waterproof board; 6. Filling space; , cable trench wall; 8, anti-seepage pull bolt; 9, lock nut; 10, through hole; 11, sealing plug; 111, flexible graphite sealing ring; 112, first abutting plate; 113, second Abutting plate; 114, abutting groove; 115, opening; 12, cavity; 13, driving assembly; 131, driving rod; 132, abutting block; 133, limit block; 134, first support rod; 135, second Support rod; 136, slider; 137, rotating nut; 14, positioning flange; 15, limit groove; 16, inclined surface; 17, spring; 18, sealing ring plate; 19, water expansion water stop strip; 20 , cobblestone sidewalk; 21, drainage slope; 22, drainage hole; 23, drainage pipe; 24, trapezoidal block.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Example:

Referring to Fig. 1, it is a concrete cable trench construction technique disclosed by the present invention, comprising the following operation steps:

Step S1: According to the design requirements, excavate the cable trench foundation groove 1, and excavate the drainage trenches 2 on both sides of the cable trench foundation trench 1; After the excavation is completed, the base shall be drained in time, and shall not be soaked in water or over-excavated.

Step S2: tamp the original soil of the base, the cable trench foundation groove 1, the crushed stone have been accepted as qualified, put the cushion center line, the side line and the elevation, and pour the concrete cushion 3 after draining the accumulated water, in the process of tamping the concrete and the cushion Drainage shall not be interrupted before the final setting of concrete;

Step S3: Lay out lines on the concrete cushion 3, and tie the wall reinforcement point by point;

Step S4: Install two sets of side wall steel formwork 4 on both sides of the concrete cushion 3, the side wall steel formwork 4 includes an inner formwork 41 and an outer formwork 42, and a waterproof plate 5 is arranged between the inner formwork 41 and the outer formwork 42 to prevent waterproofing. Between the two side walls of the plate 5 and the inner formwork 41 and the outer formwork 42 respectively, a filling space 6 for pouring concrete is reserved, and the thickness dimension of the cable trench sidewall is the distance dimension between the inner formwork 41 and the outer formwork 42;

Step S5: mixing the concrete, pouring the concrete into the filling space 6 to form the cable trench wall 7;

Step S6: the side wall steel formwork 4 is removed;

Step S7: Concrete curing and protection, after the wall plastering of the cable trench wall body 7 is completed, cover the watering and curing for not less than 7d;

Step S8: According to the design requirements, earthwork is backfilled and compacted;

Because the cable trench wall 7 formed by concrete pouring has a certain water permeability, after the earthwork is backfilled, in the rainy season, water seepage is easy to occur in the soil. The use of the waterproof board 5 can prevent the seepage of water from penetrating through the cable trench wall 7. To the inside of the cable trench wall 7, the waterproof board 5 is an anti-seepage material made of high molecular polymer as the basic raw material. The function of blocking can avoid the accumulation of water inside the wall 7 of the cable trench, which affects the normal operation of the cable.

Referring to Figure 1, the inner and outer walls of the cable trench wall 7 are painted with cement-based permeable crystalline waterproof coating; It can penetrate into the concrete through chemical reaction to generate crystallization and block the capillary pores of the concrete, and then when the backfill soil seeps out water, it can waterproof the cable trench wall 7 from the source. It further strengthens the impermeability effect and improves the stability of the cable working process.

1, step S2 also includes step S21, a cobblestone sidewalk 20 is laid in the middle of the concrete cushion 3, the length direction of the cobblestone sidewalk 20 is the same as the length direction of the cable trench wall 7, and both sides of the cobblestone sidewalk 20 are in the same direction. There is a drainage slope 21, the slope of the drainage slope 21 is 3° to 6°, the higher end of the drainage slope 21 is connected to the cobblestone sidewalk 20, and the lower end of the drainage slope 21 faces the drainage ditch 2 and is provided with drainage Holes 22, the drainage ditch 2 is arranged at equal intervals along the length direction of the cable ditch wall 7, and the drainage hole 22 is connected with a drainage pipe 23 and extends into the drainage ditch 2; The setting of the slope 21 plays a role in diverting the accumulated water, and then the accumulated water flows in the direction of the drainage hole 22 through the action of gravity, and finally the accumulated water is discharged into the drainage ditch 2 through the drainage pipe 23 in time, which can avoid The accumulated water accumulates inside the cable trench wall 7, which affects the stability of the cable working process.

1 and 2, the waterproof plate 5, the inner template 41 and the outer template 42 in step S4 are connected by anti-seepage pull bolts 8, and the two ends of the anti-seepage pull bolts 8 are threadedly connected with locking nuts 9, The distance between the inner formwork 41, the outer formwork 42 and the side wall of the waterproof board 5 is 8-10cm, and the thickness of the wall of the cable trench wall 7 is 16-20cm, and the firmness is strong; The through holes 10 matched with the anti-seepage pull bolts 8 are provided with sealing plugs 11 for blocking both ends of the through holes 10 on the anti-seepage pull bolts 8; the arrangement of the anti-seepage pull bolts 8 ensures the inner formwork 41. The distance between the outer formwork 42 and the waterproof board 5 is stable, so that after the cable trench wall 7 is poured, the waterproof board 5 is stably embedded in the cable trench wall 7, which strengthens the cable trench wall 7. Robustness; after the cable trench wall 7 is formed, unscrew the lock nut 9 and remove the formwork; after the earthwork is backfilled, the water in the soil is easy to penetrate from the outside of the cable trench wall 7 and into the through hole from one end of the through hole 10 The other end of 10 penetrates into the inside of the wall 7 of the cable trench, and the sealing block 11 can prevent the water in the soil from infiltrating the inside of the wall 7 of the cable trench, so that the cable can work stably.

Referring to FIG. 2 , the sealing plug 11 includes a flexible graphite sealing ring 111 threadedly connected to both ends of the anti-seepage pull bolt 8, a first abutting plate 112 and a second abutting plate 113 arranged in an arc shape, and the flexible graphite seals One end of the ring 111 extends into the through hole 10, a cavity 12 is provided in the anti-seepage pull bolt 8, the anti-seepage pull bolt 8 is a hollow pull bolt, and the first abutting plate 112 and the second abutting plate 113 are two by two respectively. The relative sliding is arranged in the cavity 12 , and the two opposing first abutting plates 112 and the two opposing second abutting plates 113 slide relative to each other along the radial direction of the anti-seepage pull bolt 8 . The ring wall is respectively provided with abutting grooves 114 which are matched with the first abutting plate 112 and the abutting plate. The cavity 12 is provided with a driving assembly 13 for driving the first abutting plate 112 and the second abutting plate 113 to be inserted into the abutting grooves 114 , the outer wall of the anti-seepage pull bolt 8 is respectively provided with openings 115 for the first abutting plate 112 and the second abutting plate 113 to pass through, and the locking nut 9 is pressed against the end wall of the flexible graphite sealing ring 111 facing away from the through hole 10 superior;

The flexible graphite sealing ring 111 has the characteristics of high temperature resistance, corrosion resistance and wear resistance, and has a good sealing effect; and when blocking, the flexible graphite sealing ring 111 is first rotated so that one end of the flexible graphite sealing ring 111 is inserted into the through hole 10 , block the through hole 10 to achieve the sealing effect; secondly, rotate the locking nut 9 and approach the flexible graphite sealing ring 111, so that one end of the flexible graphite sealing ring 111 can be stably fixed in the through hole 10; then use the drive assembly 13 By driving the first abutting plate 112 and the second abutting plate 113 through the opening 115 and inserting them into the groove, the outer ring wall of the flexible graphite sealing ring 111 can be pressed against the inner walls of the two ends of the through hole 10 , thereby filling the tension bolt and the through hole 10 . The gap between the inner walls of the hole 10 improves the stability of the flexible graphite sealing ring 111 in the through hole 10 and further enhances the sealing effect; in this sealing method, one end of the flexible graphite sealing ring 111 is inserted into the through hole 10, and The outer ring wall inserted into the through hole 10 is pressed against the inner wall of the through hole 10 , and the sealing effect is good, which can prevent water from penetrating into the inside of the cable trench wall 7 .

Referring to FIGS. 2 and 3 , the outer ring wall of the flexible graphite sealing ring 111 is fixed with a sealing ring plate 18 , and the side wall of the sealing ring plate 18 is provided with a water-swellable water stop strip 19 which is attached to the side wall of the cable trench wall 7 . After the earthwork is backfilled, the soil is pressed on both sides of the cable trench wall 7, and the sealing ring plate 18 and the water-expandable water stop strip 19 can be closely attached to the side wall of the cable trench wall 7; when water seeps in the soil When the water-swelling water-stop strip expands, the gap between the sealing ring plate 18 and the wall 7 of the cable trench is sealed, which further strengthens the sealing effect.

2 and 3 , the drive assembly 13 includes a drive rod 131 located in the cavity 12 , an abutment block 132 connected to one end of the drive rod 131 , a limit block 133 disposed on the bottom side wall of the abutment block 132 , a first The support rod 134, the second support rod 135, the sliding block 136 connected to one end of the first support rod 134 and the second support rod 135 respectively, and the rotation connection of the two end walls of the anti-seepage pull bolt 8 are respectively rotatably connected. The nut 137 , the first support rod 134 and the second support rod 135 all slide in the opening 115 , the size of the opening 11 is matched with the size of the first support rod 134 and the second support rod 135 , and the driving rod 131 is away from the abutment block 132 . One end extends out of the end wall of the anti-seepage pull bolt 8 and is threadedly connected with the rotating nut 137 , the outer wall of one end of the driving rod 131 away from the abutting block 132 is threaded, and one end of the driving rod 131 close to the rotating nut 137 is provided with a positioning flange 14 , the ends of the first support rod 134 and the second support rod 135 away from the slider 136 are respectively connected with the first abutting plate 112 and the second abutting plate 113 , and the slider 136 slides along the radial direction of the cavity 12 . A chute (not shown in the figure) for sliding the slider 136 can be provided along its radial direction to limit the sliding of the slider 136, and the cavity 12 is provided with a supply limit along its axial direction. A trapezoidal block 24 is provided at one end of the abutting block 132 facing the sliding block 136 , the long bottom edge of the trapezoidal block 24 is connected with the abutting block 132 , and the side wall of the sliding block 136 facing the abutting block 132 is provided. There is an inclined surface 16 matched with the waist wall of the trapezoidal block 24;

During adjustment, the rotating nut 137 is rotated, because the limiting groove 15 has a limiting effect on the sliding of the limiting block 133 , and the rotating nut 137 is threadedly connected with the driving rod 131 to drive the limiting block 133 to slide in the limiting groove 15 The abutting block 132 moves closer to the slider 136; the positioning flange 14 prevents the driving rod 131 from completely rotating into the cavity 12, and plays a limiting role; since the side wall of the slider 136 is set as the inclined surface 16 , when the abutting block 132 is sliding, the sliding block 136 is stably sliding in the chute, and then the two opposite sliding blocks 136 move away from each other, and the first support rod 134 and the second support rod 135 pass through The opening 115 allows the first abutting plate 112 and the second abutting plate 113 to be inserted into the abutting groove 114, so that the outer ring wall of the flexible graphite sealing ring 111 can be pressed against the inner wall of the through hole 10, so that the two ends of the through hole 10 can be pressed against each other. Sealing; this driving method is easy to operate, saves time and effort, and has high blocking efficiency.

Referring to FIGS. 2 and 3 , the cross-sections of the inner ring and the outer ring of the flexible graphite sealing ring 111 are both trapezoidal, so that when the flexible graphite sealing ring 111 is rotated, one end of the flexible graphite sealing ring 111 can be quickly inserted into the through hole 10 Because the inner ring section of the flexible graphite sealing ring 111 is trapezoidal, the length dimension of the first support rod 134 is smaller than the length dimension of the second support rod 135, and the first abutting plate 112 and the second abutting plate 113 can be inserted into the abutting groove 114 Inside, the tightness with which the outer ring wall of the flexible graphite sealing ring 111 fits inside the through hole 10 is improved, and the sealing effect is good.

3, the first support rod 134 and the second support rod 135 are sleeved with a spring 17, one end of the spring 17 is fixed on the inner wall of the cavity 12, and the other end of the spring 17 is fixed on the side wall of the slider 136; the spring 17 When the cable trench wall 7 is poured, the elastic force of the spring 17 can be used to move the first abutting plate 112 and the second abutting plate 113 away from the inner wall of the through hole 10 to avoid the first abutting plate 112 and the second abutting plate 113 The first abutment plate 112 and the second abutment plate 113 are bonded to the concrete; at the same time, before the concrete is poured, protective mold sleeves can be set on both ends of the anti-seepage pull bolt 8 to prevent the concrete slurry from infiltrating into the cavity 12 through the opening 115 , which affects the sliding of the slider 136 .

Working process: after the steel plate is removed, firstly rotate the flexible graphite sealing ring 111 so that one end of the flexible graphite sealing ring 111 is inserted into the through hole 10; secondly, rotate the locking nut 9, so that the flexible graphite sealing ring 111 tightly blocks the through hole 10, and then can The water-swellable water-stop strip 19 is tightly attached to the outer wall of the cable trench wall 7 to achieve a sealing effect; then the rotating nut 137 is rotated to drive the abutment block 132 to slide in the direction of the slider 136. At this time, the two opposite first One rod 134 and two opposite second rods 135 are separated from each other, and at the same time, the spring 17 is compressed, so that both the first abutting plate 112 and the second abutting plate 113 can be inserted into the abutting groove 114, so that the flexible graphite can be sealed The inner ring wall of the ring 111 is pressed against the inner wall of the through hole 10, which further enhances the sealing effect;

After earthwork is backfilled, when there is water seepage, the water-swelling water-stop strip 19 expands firstly, filling the gap between the cable trench wall 7 and the sealing ring plate 18, and realizing the initial waterproof effect; One end is tightly blocked to pass through, and the outer ring wall of the other end is pressed against the inner wall of the through hole 10, which realizes the secondary waterproof and impermeability effect, and effectively prevents water from penetrating into the inside of the cable trench wall 7; when the cable trench wall When water seepage occurs in the upper part of the cable trench 7, the drainage slope 21 can be used to drain the accumulated water inside the cable trench wall 7 into the drainage trench 2 in time, thereby preventing water accumulation in the cable trench wall 7 and affecting the normal operation of the cable. Work.

The embodiments of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered in within the protection scope of the present invention.

Claims (10)

1. A concrete cable trench construction process is characterized in that: the method comprises the following steps:

step S1, digging a cable trench base groove (1) according to design requirements, digging drainage ditches (2) at two sides of the cable trench base groove (1), draining water on a substrate in time after digging, avoiding soaking in water and overexcavation, and filling broken stones to the elevation of the substrate if overexcavation is performed;

step S2, tamping the original soil of the base, placing the center line, the side line and the elevation of the cushion layer after the acceptance of the cable trench foundation trench (1) and the broken stones is qualified, and pouring the concrete cushion layer (3) after draining accumulated water;

step S3: paying off the concrete cushion (3), and binding wall ribs point by point;

step S4: two groups of side wall steel templates (4) are arranged on two sides of the concrete cushion (3), each side wall steel template (4) comprises an inner template (41) and an outer template (42), a waterproof plate (5) is arranged between each inner template (41) and each outer template (42), and a filling space (6) for pouring concrete is reserved between each two side walls of each waterproof plate (5) and each inner template (41) and each outer template (42);

step S5: concrete is stirred and poured to form a cable trench wall body (7);

step S6: dismantling the side wall steel template (4);

step S7: concrete curing and protecting, namely covering, watering and curing for no less than 7 days after plastering of the wall of the cable trench wall (7) is finished;

step S8: and backfilling and compacting the earthwork according to the design requirement.

2. The concrete cable trench construction process of claim 1, wherein: the waterproof plate (5), the inner formwork (41) and the outer formwork (42) in the step S4 are connected through the anti-seepage split bolt (8), the two ends of the anti-seepage split bolt (8) are in threaded connection with the locking nuts (9), a through hole (10) matched with the anti-seepage split bolt (8) is formed in the cable trench wall body (7), and the anti-seepage split bolt (8) is provided with a sealing plugging piece (11) used for plugging two ends of the through hole (10).

3. The concrete cable trench construction process of claim 2, wherein: a cavity (12) is arranged in the anti-seepage split bolt (8), the sealing plugging piece (11) comprises flexible graphite sealing rings (111) which are respectively in threaded connection with two ends of the anti-seepage split bolt (8), a first abutting plate (112) and a second abutting plate (113) which are arranged in the cavity (12) in a sliding mode in a pairwise opposite mode and are arc-shaped, one end of the flexible graphite sealing ring (111) extends into the through hole (10), abutting grooves (114) matched with the first abutting plate (112) and the second abutting plate (113) are respectively arranged on the inner annular wall of the flexible graphite sealing ring (111), a driving component (13) for driving the first abutting plate (112) and the second abutting plate (113) to be inserted into the abutting groove (114) is arranged in the cavity (12), an opening (115) for the first abutting plate (112) and the second abutting plate (113) to penetrate through is formed in the outer wall of the anti-seepage split bolt (8).

4. A concrete cable trench construction process according to claim 3, wherein: the driving assembly (13) comprises a driving rod (131) which is axially in the same direction as the anti-seepage split bolt (8), a supporting block (132) connected with one end of the driving rod (131), a limiting block (133) arranged on the side wall of the bottom of the supporting block (132), a first supporting rod (134) and a second supporting rod (135) which are in the same direction as the anti-seepage split bolt (8) in the radial direction, a sliding block (136) respectively connected with one ends of the first supporting rod (134) and the second supporting rod (135) and a rotating nut (137) respectively rotatably connected to the two end walls of the anti-seepage split bolt (8), the first supporting rod (134) and the second supporting rod (135) both slide in the opening (115), one end of the driving rod (131) far away from the supporting block (132) extends out of the end wall of the anti-seepage split bolt (8) and is in threaded connection with the rotating nut (137), one ends of the first supporting rod (134) and the second supporting rod (135) far away from the sliding block (136) are respectively connected with the first supporting plate (112) and the second supporting, the anti-seepage split bolt is characterized in that the sliding block (136) slides along the radial direction of the anti-seepage split bolt (8), a limiting groove (15) for the limiting block (133) to slide is arranged in the cavity (12) along the axial direction of the cavity, and inclined surfaces (16) are arranged on the side walls, in contact with the abutting blocks (132), of the sliding block (136).

5. The concrete cable trench construction process of claim 4, wherein: the sections of the inner ring and the outer ring of the flexible graphite sealing ring (111) are both trapezoidal, and the length dimension of the first supporting rod (134) is smaller than that of the second supporting rod (135).

6. The concrete cable trench construction process of claim 4, wherein: all be equipped with spring (17) on first branch (134), second branch (135), the one end of spring (17) is fixed at cavity (12) inner wall, the lateral wall at slider (136) is fixed to the other end of spring (17).

7. A concrete cable trench construction process according to claim 3, wherein: and a sealing ring plate (18) is fixed on the outer ring wall of the flexible graphite sealing ring (111), and a water-swelling water stop strip (19) is arranged on the side wall of the sealing ring plate (18) and attached to the side wall of the cable trench wall (7).

8. The concrete cable trench construction process of claim 1, wherein: the step S2 further includes a step S21: the cobblestone pavement (20) is laid in the middle of the concrete cushion layer (3), drainage slopes (21) are arranged on two sides of the cobblestone pavement (20), the higher end of each drainage slope (21) faces the cobblestone pavement (20), the lower end of each drainage slope (21) faces the drainage ditch (2) and is provided with a drainage hole (22), and the drainage hole (22) is connected with a drainage pipe (23) and extends into the drainage ditch (2).

9. The concrete cable trench construction process of claim 1, wherein: and the inner wall and the outer wall of the cable trench wall body (7) are coated with cement-based capillary crystalline waterproof paint.

10. The concrete cable trench construction process of claim 1, wherein: the distance between the inner template (41) and the outer template (42) and the side wall of the waterproof board (5) is 8-10 cm.

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