CN209620106U - A kind of prefabricated square cable active well bottom plate and borehole wall plate integral connecting structure - Google Patents

Abstract

The utility model discloses a prefabricated square cable working well bottom plate and well wall plate integrated connection structure, the bottom plate and the well wall plate are prefabricated plates, and pouring is provided between the lower end of the well wall plate and the left and right ends of the bottom plate. The cast-in-place concrete cavity belt of concrete, the cast-in-place concrete cavity belt includes the grooves provided at the lower end of the well wall plate and the left and right ends of the bottom plate, and the outlet bars with steel bars are drawn out from the grooves, and the outlet bars are folded The bend is a triangular hook, and the triangular hooks drawn from the well wall and the bottom plate are staggered along the horizontal direction. The triangular hooks are bound and fixed with the long bars to form a steel cage. The concrete and steel bars poured in the cast-in-place concrete cavity belt The cages combine to form triangular anchorage cast-in-place strips. The utility model adopts the above-mentioned technical scheme, and the bottom plate and the well wall plate can form a whole body under mutual stress, so as to prevent the well wall plate from being displaced under the action of soil layer pressure.

Description

A prefabricated square cable working well bottom plate and well wall plate integrated connection structure

technical field

The utility model relates to electric power engineering technology, in particular to a cable working well.

Background technique

As the process of urban modernization is accelerating, urban space is becoming increasingly tense. In order to effectively utilize land and space resources, underground cables have become the needs and trends of today's social development. At present, most of the domestic cable trenches and working wells are cast-in-place concrete. This kind of trenches and working wells have good integrity, impermeability, and earthquake resistance, but the excavation and material stacking on the construction site occupy a large area and require manpower. The investment is large, the workload is heavy, the mold making is time-consuming and difficult to reuse, the construction period is long and the construction quality cannot be guaranteed; noise and dust pollution are generated during the construction period, which has a great impact on road traffic and brings inconvenience to the daily life of the public; In areas with shallow groundwater levels, long-term pumping is required during construction, which consumes a lot of electricity.

The prefabricated assembled cable trench working well can overcome the defects and deficiencies of the existing concrete cable working well, but there is also the problem of side wall displacement under the action of soil pressure.

Utility model content

The technical problem to be solved by the utility model is to provide a prefabricated square cable working well bottom plate and the well wall plate integrated connection structure, which solves the technical problem of displacement of the side wall under the pressure of the soil layer.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a prefabricated square cable working well bottom plate and well wall plate integrated connection structure, the bottom plate and the well wall plate are prefabricated plates, the lower end of the well wall plate and the bottom plate There is a cast-in-place concrete cavity belt for pouring concrete between the left and right ends of the well. The cast-in-place concrete cavity belt includes the lower end of the well wall plate and the left and right ends of the bottom plate. The outlet tendons are bent into triangular hooks and the triangular hooks drawn from the well wall plate and the bottom plate are staggered along the horizontal direction. The triangular hooks are tied and fixed with the long bars to form a reinforcement cage. The concrete poured in the cavity belt is combined with the steel cage to form a triangular anchor cast-in-place belt.

Optionally, grooves are arranged at intervals along the vertical direction on the inner wall and outer wall of the butt ends of two adjacent well wall panels, and the grooves on the inner and outer walls are evenly arranged at staggered intervals along the vertical direction. Pre-embedded steel bar threaded sleeve for bolt threaded connection.

Optionally, a sinking step is provided at the butt joint ends of two adjacent bottom plates, and a pre-embedded steel bar threaded sleeve that is threadedly connected with the assembly bolt is provided at the corresponding position of the step, and the steel bar is led out at the corresponding position of the step and connected by binding Reinforce the steel bars and pour concrete at the steps of the adjacent two bottom slabs.

The utility model adopts the above-mentioned technical scheme, and has the following beneficial effects: while the base plate and the well wall plate are fastened together by steel backing plates and assembly bolts, the connection is a cast-in-place concrete belt formed by pouring concrete with triangular hooks, so The bottom plate and the well wall plate can form a whole that bears mutual force to prevent the well wall plate from shifting under the pressure of the soil layer, and because the cast-in-place concrete belt formed between the bottom plate and the well wall plate does not need to re-support the formwork, it can be used directly The concrete prefabricated part forms a pouring belt, which has the advantage of convenient construction.

The specific technical solutions and beneficial effects of the present utility model will be described in detail in the following specific embodiments with reference to the accompanying drawings.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Fig. 1 is a schematic diagram of the section structure of the well chamber in the utility model;

Fig. 2 is a schematic diagram of the connection structure between the wall plate and the bottom plate of the utility model;

Fig. 3 is a schematic diagram of the connection structure of two adjacent base plates in the utility model;

Fig. 4 is the schematic diagram of the main view connection structure of two adjacent well wall panels in the utility model;

Fig. 5 is the top view connection structure schematic diagram of two adjacent well wall panels in the utility model;

Fig. 6 is a schematic diagram of the connection structure of two adjacent top plates in the utility model;

Fig. 7 is a schematic diagram of the connection structure between the well wall plate and the top plate of the utility model;

Fig. 8 is a schematic cross-sectional structure diagram of the wellbore in the utility model;

Fig. 9 is a schematic diagram of the structure of the shaft side wall plate in the utility model;

Fig. 10 is a schematic diagram of the connection structure between the wellbore side wall plate and the wellbore end wall plate in the utility model;

Fig. 11 is a schematic diagram of the connection structure between the wellbore mouth plate and the top plate in the utility model.

Detailed ways

The utility model proposes to assemble the prefabricated cable working shaft as a whole in segments, which can not only give full play to the advantages of the prefabricated pipes and wells, but also have the advantages of strong unit assembly flexibility and suitability for topographical conditions at different manholes.

As shown in Figure 1, a prefabricated square cable working shaft includes a well chamber and a well shaft connected to the end of the well chamber. Well siding 12. Wherein, the bottom plate 11, the top plate 13 and the connection part of the well wall plate 12 are pasted with waterproof tape in advance, and then spliced.

As shown in Figure 2, a cast-in-place concrete cavity band 14 for pouring concrete is provided between the lower end of the well wall plate and the left and right ends of the base plate, and the cast-in-place concrete cavity band 14 includes the lower end of the well wall plate and The tongue and groove provided at the left and right ends of the bottom plate lead out the ribs with steel bars from the tongue and groove. The ribs are bent into triangular hooks and the triangular hooks drawn out from the well wall plate and the bottom plate are staggered along the horizontal direction. The hooks are tied and fixed with the long bars to form a reinforcement cage. The concrete poured in the cast-in-place concrete cavity belt 14 is combined with the reinforcement cage. . Therefore base plate 11 and shaft wall plate 12 can form the integral body of mutual force, prevent shaft wall plate 12 from shifting under the action of soil layer pressure, have increased the overall stability and earthquake resistance of cable well, and because base plate 11 and well wall The cast-in-place concrete strip formed between the plates 12 does not need to re-support the formwork, and the concrete prefabricated part is directly used to form the pouring strip, which has the advantage of convenient construction.

As shown in FIG. 3 , the bottom plates 11 are butted sequentially along the extending direction of the well chamber, and the butt joint ends of two adjacent bottom plates are fastened together by steel backing plates and assembly bolts. A sinking step 111 is provided at the butt joint ends of two adjacent bottom plates, and the adjacent steps 111 are butted to form a cast-in-place belt. At the corresponding position of the step, there is a pre-embedded steel bar threaded sleeve 15 threadedly connected with the assembly bolt, and a steel bar is drawn out at the corresponding position of the step. The reinforcing steel bars 16 are connected by binding and binding, and pouring concrete is combined with the reinforcing bars at the steps of the adjacent two base plates. Because the adjacent two bottom plates 11 are connected by the steel backing plate, and the whole is formed by cast-in-place concrete. Therefore, there is a pulling force between the bottom plates, so that the bottom plate of the well chamber is formed as a whole, and the force is uniform.

As shown in Fig. 4 and Fig. 5, the well wall plates 12 are sequentially butted along the extending direction of the well chamber, and the butt joint ends of two adjacent well wall plates are fastened together by steel backing plates and assembly bolts. At the same time, the inner wall and the outer wall of the butt joint ends of the adjacent two well wall panels are provided with grooves 121 at intervals along the vertical direction, and the grooves of the inner and outer walls are evenly arranged at staggered intervals along the vertical direction, that is, the grooves on the inner wall and the grooves on the outer wall are equally spaced. Evenly spaced along the vertical direction, while the grooves on the inner wall and the grooves on the outer wall are staggered in the vertical direction, and the corresponding positions of the grooves are provided with pre-embedded steel threaded sleeves 15 that are threadedly connected with the assembly bolts. In this way, two adjacent well wall plates 12 form a zigzag fastening connection, which can be applied to the laying of cable pipe trenches for a long section, and ensures that the cable working well is under different lateral pressures at different positions. No misalignment occurs. Further, vertical grouting grooves 17 for pouring concrete are provided at the butt joint ends of the wall panels of two adjacent wells, and high-strength grouting materials are poured after the butt joint. This makes the rigid connection between the wall panels of two adjacent wells more stable and tight, reduces the deformation of the connection joint, and further improves the waterproof performance.

As shown in Figure 6, the top plates 13 are sequentially butted along the extension direction of the well chamber, and socket openings 131 are provided at the butt joint ends of two adjacent top plates, wherein a water stop is provided at the lower socket and a water-swellable rubber strip is installed in the water stop, thereby forming Stable connection and reliable sealing.

As shown in FIG. 7 , a water stop 122 is provided between the top of the well wall plate 12 and the roof 13 and a water-swellable rubber strip is installed in the water stop. The top of the well wall plate is provided with two water stops, the upper one is larger and the lower one is smaller, and the water-swellable rubber strip is installed, and finally the top plate is installed to form two sealing rings. The top plate can be disassembled flexibly, which is convenient for installation and maintenance of equipment in this well section.

Because the top plate 13 and the top plate joint position, and the top of the well wall plate 12 and the top plate 13 joint position are waterproof through the water-swellable adhesive strip. Two adjacent well wall plates 12 are poured with high-strength grouting material through vertical grouting grooves 17 to seal and waterproof. A stable sealed and waterproof structure is formed as a whole, and the cable well can have a better waterproof effect in an environment with high underground humidity.

The end of the well chamber is connected to the wellbore 2 . As shown in Figures 8 and 9, the wellbore 2 includes a wellbore sidewall plate 21 connected to the wellbore end wallboard, a wellbore bottom wallboard connected to the wellbore end bottom plate, and a wellbore sidewall plate connected to the wellbore sidewall plate. The wellbore mouth plate 23 and the wellbore end wall plate 22, the wellbore end wall plate 22 is provided with a cable duct connection port 221 for passing through the cable duct, the wellbore side wall plate 21 is provided with an L-shaped notch 211, and the L-shaped notch is provided with L-shaped steel plate. Wherein, the top plate of the end of the well chamber extends to the L-shaped notch, the mouth plate 23 of the wellbore is connected to the vertical surface of the L-shaped notch of the sidewall of the wellbore and the bottom surface is connected to the top plate of the end of the wellbore, and the end wall plate 22 of the wellbore is connected to The end of the wellbore sidewall. Due to the high pressure of the soil layer at the L angle position, an L-shaped steel plate is added to prevent cracks in the concrete at this section.

Wherein, the connection structure between the wellbore side wall plate 21 and the wellbore bottom wall plate and the connection structure between the well chamber well wall plate and the bottom plate can be the same, and the connection structure between the wellbore bottom wall plate and the well end bottom plate is the same as the connection between the two adjacent bottom plates of the well chamber. The structures can be the same, so that the wellbore and the well chamber form a stressed whole. The L-shaped steel plate at the L-shaped notch of the shaft side wall plate is provided with a through hole through which the concrete passes through the L-shaped steel plate when pouring concrete (stones can flow into the formwork surface through this hole), the purpose is to make the lower part of the steel plate position full of concrete when pouring concrete.

As shown in Figure 10, the wellbore end wall plate 22 is provided with a positioning gap that abuts against the end of the wellbore side wall plate, and the matching surface of the wellbore side wall plate and the positioning notch of the wellbore end wall plate is set along the vertical direction. Groove 17 is connected by pouring high-strength grouting material. In the grouting groove of the end face of the wellbore side wall plate, pre-embedded steel bar thread sleeves 15 are evenly spaced along the vertical direction. The fastening hole 25 is connected with the pre-embedded steel bar threaded sleeve through assembly bolts. In addition, the side wall plate 21 of the shaft is provided with a climbing ladder, and the side wall plate of the shaft is preset with a pre-embedded steel bar threaded sleeve 15 for installing the ladder.

As shown in FIG. 11 , a wedge-shaped opening 24 with a high inside and a low outside is set between the wellbore mouth plate 23 and the top plate of the well chamber end, and the inside of the wedge-shaped opening is poured with concrete and then anchored externally. In addition, the connection structure between the wellbore mouth plate 23 and the wellbore side wall plate and the connection structure between the wellbore end wall plate 22 and the wellbore side wall plate can be completely the same.

The joints between well wall plates and well wall plates, the joints between bottom plates and bottom plates, and the joints between top plates and top plates can be overlapped in pairs or evenly. The joint of the well wall is located in the center of the bottom plate, avoiding the joint of the bottom plate, and the force is even.

The above-mentioned assembly bolts are hexagonal head bolts, and the hexagonal head bolts pass through the fastening holes and realize the threaded connection through the pre-embedded steel bar threaded sleeve to achieve the function of fixed connection; In the groove, so that the grout can connect the hex head bolts and the well chamber as a whole, so that the overall structure not only has a soft connection but also a rigid connection, so that the overall structure has good waterproof performance and good connection firmness.

Each prefabricated component of the prefabricated square cable working well of the utility model, that is, the bottom plate, top plate, well wall plate and shaft shaft parts, all have a plurality of lifting threaded holes, and the well wall plate and the bottom plate lifting threaded holes are arranged in rows correspondingly. The threaded holes for lifting can not only satisfy mold lifting, transportation, and hoisting, but also in the later installation, the threaded holes of the well wall plate and the bottom plate are arranged in rows correspondingly, which can increase the temporary support of the special set, which is convenient for on-site installation and construction. Ensure the stability and safety of the installation, and at the same time, it can be used to fasten the facing well wall and adjust the installation accuracy.

The top plate is used for maintenance of equipment in the well in the later stage, so that the top plate can be opened conveniently and a lifting ring is set.

Each prefabricated component of the prefabricated square cable working well of the utility model, that is, the bottom plate, top plate, well wall plate and shaft shaft parts, are all prefabricated with impermeable reinforced concrete with a strength level not lower than C35 and an impermeability level not lower than P8. The maximum water-binder ratio of concrete is 0.5, the maximum chloride ion content is 0.15%, and the maximum alkali content is 3.0kg/m ³ . The strength should not be lower than C35 to realize the anti-compression function in normal use, and it can also be applied to most environments. The impermeability level should not be lower than P8, which can make the cable well meet the drainage and waterproof functions as a whole, and maintain a good environment in the well for a long time. ; while the maximum water-binder ratio of concrete is 0.5, the maximum chloride ion content is 0.15%, and the maximum alkali content is 3.0kg/m ³ , which can slow down the adverse effects of the external environment on the overall corrosion, penetration and efflorescence of the inspection well. , Extend the overall service life of the cable shaft.

installation method:

1. The bottom plate, well wall plate, roof plate and shaft of the prefabricated square cable working well are all pasted with waterproof tape at the joints; the foundation trench is excavated on site, the cushion is poured and leveled.

2. For lofting and positioning on the cushion layer, first hoist the first bottom plate, adjust the position and level it, and hoist all the remaining bottom plates in turn.

3. Stakeout on the bottom plate to locate the installation position of the well wall plate.

4. Lift the first wellbore side wall plate, place the first well chamber end well wall plate vertically with the positioning area of the bottom plate and align it with the positioning line. Install oblique supports between the wall plate and the bottom plate at the end of the first well chamber, and two sets of oblique supports must be used for each wall plate and bottom plate at the end of the well chamber, and the length and length are combined into one set. The oblique support is connected with 4 lifting threaded holes on the well wall plate at the end of the well chamber, and 2 lifting holes adjacent to the bottom plate.

5. Hoist the wellbore end wall plate, which is perpendicular to the installation direction of the first wellbore side wall plate, abut the wellbore end wall plate against the first wellbore side wall plate and the bottom plate, and connect them through bolt fasteners .

6. Hoist the second wellbore side wall plate, the second wellbore side wall plate is in the same position as the first wellbore side wall plate, close to the wellbore end wall plate and put it down vertically, fall in the area of the positioning line, use a tight The firmware connects the two boards. Then install the oblique support so that it is connected and fixed with the base plate. Remove the sling and install the next well wall plate.

7. Install the wall panels of the well chamber in a clockwise direction. After the whole body installation of the well wall plate is completed, the oblique support is removed. And use the push rod to tighten the facing well wall.

8. Hoist the shaft mouth plate and fasten it.

9. Bind the lower part of the well wall plate and the bottom plate with steel bars, bind the bottom plate and the bottom plate with steel bars, and perform cast-in-place concrete pouring.

10. Block the connection ports of the fasteners of each component, carry out grouting from the top of the well wall from top to bottom, and seal the anchor with waterproof mortar.

11. Install water-expandable rubber strips on the upper water stop of the side wall plate and the socket water stop of the top plate.

12. The roof is hoisted sequentially along the length of the well chamber, and the roof and the socket of the roof are closely fitted.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to those described in the above specific embodiment. content. Any modifications that do not deviate from the functional and structural principles of the present utility model shall be included in the scope of the claims.

Claims (3)

1. A prefabricated square cable working well bottom plate and well wall plate integrated connection structure, the bottom plate and well wall plate are prefabricated plates, characterized in that: there is a pouring concrete between the lower end of the well wall plate and the left and right ends of the bottom plate The cast-in-place concrete cavity belt, the cast-in-place concrete cavity belt includes the lower end of the well wall plate and the left and right ends of the bottom plate. It is a triangular hook and the triangular hooks drawn from the well wall and the bottom plate are staggered along the horizontal direction. The triangular hooks are bound and fixed with the long bars to form a reinforcement cage. The concrete and reinforcement cages poured in the cast-in-place concrete cavity belt Combined to form a triangular anchor cast-in-place belt. 2. According to claim 1, a prefabricated square cable working well bottom plate and well wall plate integrated connection structure is characterized in that grooves are arranged at intervals along the vertical direction on the inner wall and outer wall of the butt ends of two adjacent well wall plates, In addition, the grooves on the inner and outer walls are evenly arranged at staggered intervals along the vertical direction, and pre-embedded steel bar threaded sleeves that are threadedly connected with the assembly bolts are provided at the corresponding positions of the grooves. 3. A prefabricated square cable working well bottom plate and well wall plate integral connection structure according to claim 1, characterized in that: a sinking step is provided at the butt joint ends of two adjacent bottom plates, and an assembly bolt is provided at the corresponding position of the step The pre-embedded steel bar threaded sleeve connected by thread leads out the steel bar at the corresponding position of the step and binds and connects the reinforced steel bar, and pours concrete at the steps of the two adjacent bottom plates.