CN204456228U - A kind of diaphragm wall fast plugging device - Google Patents

Abstract

The utility model discloses a fast sealing device for an underground continuous wall, which comprises a base plate and a cover plate; the base plate is a steel plate in the shape of an outer square and an inner circle, and bolt holes are arranged on its periphery, and a plate is arranged around the inner circle. Hanging buckle fixing rod and multiple hinge fixing supports; the cover plate is a circular steel plate, and a plate hanging buckle movable rod and multiple hinge fixing bodies are arranged around it, and two pressure relief valves are arranged on the lower part ; The plate hanging buckle fixed bar is adapted to the plate hanging buckle movable bar; the hinge fixed support is adapted to the hinge fixed body. The beneficial effects of the utility model are as follows: the structure is simple and the weight is light; since the structure is divided into two parts, they can be installed separately and are convenient for manual operation. It is suitable for water gushing sealing at any height and any part of the underground diaphragm wall. It can be easily assembled and disassembled; it can be reused, which greatly reduces the cost of plugging.

Description

A rapid sealing device for underground diaphragm wall

technical field

The utility model relates to the technical field of building construction, in particular to a fast sealing device for an underground continuous wall.

Background technique

After decades of development, the underground diaphragm wall has been widely used in shafts and underground structures of pumping stations, pools, building foundation pits, underground warehouses, municipal pipe trenches and culverts, open-cut and buried subway tunnels, shield tunnels, etc. However, due to many uncertain factors in the construction process and construction process, the quality of the underground diaphragm wall is often defective, and water leakage occurs during the excavation of the foundation pit. In severe cases, water gushing and sand gushing will occur. The uneven settlement of the ground makes it impossible to excavate the foundation pit, which increases the risk of the foundation pit project and causes great losses.

The anti-leakage treatment of underground diaphragm wall joints has always been a technical problem in the construction of diaphragm walls, which is prone to common quality problems. The main reasons are as follows:

① During the concrete pouring process of the underground diaphragm wall, the joints of the groove sections are not cleaned cleanly, there is mud inclusion phenomenon, and there may be local flow-around concrete, which greatly reduces the water-stop performance of the joints.

② During the construction of the underground diaphragm wall joint, when the concrete is poured and the joint box is pulled out, the mud bag or sand bag will be left on the edge of the groove. When the second groove section is formed with a grab bucket, it is difficult to remove the Mud bags or sand bags, which cause mud and sand bags between the groove sections. When the foundation pit is excavated, under the action of water and soil pressure on the back of the wall, the mud between the groove sections is washed away to form a water flow channel, which in turn leads to water leakage and sand gushing.

③ The joints of the underground diaphragm wall adopt the form of I-steel joints with good water-stop effect, and the grouting pipes are pre-embedded at the joints of the underground diaphragm walls. Fine cement slurry, before excavation of the foundation pit, the pile bottom of the high-pressure jet grouting pile applied at the joint is inserted into the relatively water-proof clay layer, these reinforcement measures are difficult to guarantee 100% effect, especially in ultra-deep underground Diaphragm walls, seepage is hard to avoid.

④Underground diaphragm walls often have a high reinforcement ratio, dense steel bars, and a large number of connectors connected to the main structure, which may lead to areas where the concrete of the underground diaphragm wall is not poured densely or relatively weak parts, and the places where mud is trapped Under the action of water and soil pressure, it may become the passage of groundwater, and these locations are all hidden dangers of water gushing.

⑤ It is difficult to control the verticality of the grooves of ultra-deep underground diaphragm walls. According to the "Highway Engineering Quality Inspection and Evaluation Standards", the allowable deviation of verticality is 0.5% of the wall depth, and there is also a 150mm gap at the unsealed part of the underground diaphragm wall at the 30m excavation of the foundation pit. It is a hidden danger of water gushing.

⑥The effect of grouting on the toe of the underground diaphragm wall is not good, which directly affects the uneven settlement of the underground diaphragm wall. The uneven settlement of the underground diaphragm wall leads to relative sliding at the joints, resulting in water gushing at the joints.

⑦ During the excavation of the foundation pit, the connection of the various processes of excavation and support is unreasonable. After the excavation of the foundation pit, the deformation of the diaphragm wall gradually expands the width of the joints and cracks with the passage of time, which intensifies the joints and cracks. leakage.

⑧ After the heavy rain, the surface water level outside the foundation pit rises, which increases the water pressure difference inside and outside the foundation pit. The parts that were not easy to find mud or concrete damage are squeezed by water pressure, forming water gushing channels.

To sum up, the problem of water leakage and water gushing in underground diaphragm walls is difficult to eliminate from the source. The traditional treatment measures for water gushing in underground diaphragm walls are generally to first block with wooden plugs, then press fill the surface, and use short steel pipes or rubber hoses according to the amount of water. Drainage, seal the surrounding area with mortar, grout the back with cement or chemical grout, finally seal the drainage pipe, again seal the water gushing point with grouting, and carry out double liquid injection from the ground or at the leakage point to the outside of the ground connection wall according to the situation. Grouting to completely seal leaks. The above-mentioned treatment measures are inefficient, take a long time to block, and when there is a large influx of water, the square logs are not easy to block, and often require the cooperation of large machinery such as excavators, which is inconvenient to operate; After the depth, the water gushing point is relatively high from the excavation surface, and the surface pressure filling is not easy to operate.

Therefore, there is an urgent need for a rapid sealing device for underground diaphragm walls that can be completed only by manual work and small-sized implements in a narrow space.

Contents of the invention

The technical problem to be solved by the utility model is to provide a rapid sealing device for the lower continuous wall which has the advantages of simple structure, convenient operation, wide application range and reusability.

In order to solve the problems of the technologies described above, the technical solution adopted by the utility model is:

A rapid sealing device for an underground diaphragm wall, comprising a base plate and a cover plate; the base plate is a steel plate in the shape of an outer square and an inner circle, with bolt holes arranged around it, and a plate hanging buckle fixing bar member around the inner circle and a plurality of hinge fixed supports; the cover plate is a circular steel plate, and a plate hanging buckle movable rod and a plurality of hinge fixed bodies are arranged around it, and two pressure relief valves are arranged in the lower part; the plate hanging The buckle fixed rod is compatible with the plate hanging buckle movable rod; the hinge fixed support is compatible with the hinge fixed body.

Preferably, the thickness of the bottom plate and the cover plate are both 16mm.

Preferably, the inner circle of the bottom plate protrudes upwards by 50 mm.

Preferably, a sealing rubber ring is provided inside the inner circle of the bottom plate.

Preferably, expansion bolts are installed in the bolt holes.

Preferably, the number of the hinge fixing support and the hinge fixing body is seven respectively.

The working principle of the utility model is as follows:

Roughly level the surface of the underground diaphragm wall around the gushing water, mark the position of the expansion bolt according to the position of the bolt hole on the bottom plate of the sealing device, and then install the expansion bolt. The bottom of the expansion bolt is cut off, and the remaining thread section is welded on the steel plate.

Install the rubber pad according to the position of the expansion bolt, which is suitable for the flatness of the surface of the underground continuous wall. The rubber pad can be thickened in the local concave part to make the whole rubber pad close to flat. The thickness of the rubber pad is 10mm, the width is 60mm, and the bolt holes are ∮20 bolt holes.

A sealing rubber ring is installed on the inner circle of the bottom plate, and then the bottom plate is fixed on the underground continuous wall through expansion bolts.

The two pressure relief valves on the cover plate are fully opened, and the hinge fixing support on the bottom plate and the hinge fixing body on the cover plate are connected together by pins to form a hinge connection assembly.

Close the cover plate, turn the plate hanging buckle movable rod on the cover plate from up to down, buckle it into the plate hanging buckle fixed rod on the bottom plate, and install the rest of the hinge fixing support and hinge fixing body pins.

Close the two pressure relief valves, the temporary sealing of the water gushing in the underground diaphragm wall is completed, and there will be no more water gushing.

Grout with cement or chemical grout on the back of the underground diaphragm wall where water gushes, and finally close the water gushing point by grouting again through the pressure relief valve to completely seal the leaking point.

After the grout is solidified, open the pressure relief valve to check the effect of blocking water gushing, remove the plugging device after passing the test, and recycle the plugging device after cleaning it.

The beneficial effects produced by adopting the above-mentioned technical scheme are as follows:

The rapid sealing device for underground continuous wall described in the utility model has simple structure and light weight; since it is structurally divided into two parts, it can be installed separately and is convenient for manual operation.

The device is easy to operate, fast in sealing speed and wide in scope of application. It is suitable for the sealing of water gushing at any height and any part of the underground diaphragm wall. It can effectively and quickly seal the working shaft where the space is narrow and there is no large-scale machinery. Gushing water.

It can be easily assembled and disassembled; it can be reused, which greatly reduces the cost of plugging.

The utility model is safe, reliable, efficient, economical and practical.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the installation structure of an underground continuous wall fast sealing device described in the utility model;

Fig. 2 is the A-A direction structural sectional view of Fig. 1;

Fig. 3 is a B-B direction structural sectional view of Fig. 1;

Fig. 4 is a schematic diagram of the bottom plate structure of the underground diaphragm wall rapid sealing device described in the utility model;

Fig. 5 is a structural schematic diagram of the cover plate of the fast sealing device for underground diaphragm wall described in the present invention;

Among them, 1. Bottom plate, 2. Cover plate, 3. Bolt hole, 4. Pressure relief valve, 5. Sealing rubber ring, 6. Underground diaphragm wall, 7. Expansion bolt, 8. Plate hanging buckle fixing rod, 9 1. Hinge fixed support, 10. Plate hanging buckle movable rod, 11. Hinge fixed body, 12. Rubber pad.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As can be seen from the embodiment shown in Fig. 1, a kind of rapid sealing device for an underground diaphragm wall described in the utility model includes a bottom plate 1 and a cover plate 2; The bolt hole 3 is provided with a plate hanging buckle fixed rod 8 and 7 hinge fixed supports 9 around its inner circle; the cover plate 2 is a circular steel plate, and a plate hanging buckle movable rod 10 and A plurality of hinge fixed bodies 11, the lower part of which is provided with two pressure relief valves 4; plate hanging buckle fixed rod 8 and plate hanging buckle movable rod 10 are matched; hinge fixed support 9 and hinge fixed body 11 are matched .

Both the bottom plate 1 and the cover plate 2 have a thickness of 16 mm. The inner circle of the bottom plate 1 protrudes upwards by 50 mm. A sealing rubber ring 5 is provided inside the inner circle of the bottom plate 1 . Expansion bolts 7 are installed in the bolt holes 3 .

The working principle of the above-mentioned rapid sealing device for the underground diaphragm wall is as follows:

Roughly level the surface of the underground diaphragm wall 6 around the gushing water, mark the position of the expansion bolt 7 according to the position of the bolt hole 3 of the bottom plate 1 of the sealing device, and then install the expansion bolt 7. If steel plates such as I-beams and embedded steel plates are encountered When using similar objects, it is necessary to cut off the bottom of the expansion bolt 7, and the remaining threaded section is welded on the steel plate.

Rubber pad 12 is installed according to the position of expansion bolt 7, suitable for the flatness of underground continuous wall 6 surfaces, can thicken rubber pad 12 at local recessed position, makes whole rubber pad 12 close to smooth. The rubber pad 12 has a thickness of 10mm and a width of 60mm, and the bolt holes 3 are ∮20 bolt holes.

The sealing rubber ring 5 is installed on the inner circle of the bottom plate 1, and then the bottom plate 1 is fixed on the underground continuous wall 6 through expansion bolts 7.

The two pressure relief valves 4 on the cover plate 2 are fully open, and the hinge fixing support 9 on the bottom plate 1 and the hinge fixing body 11 on the cover plate 2 are connected together by pins to form a hinge connection assembly.

Close the cover plate 2, turn the plate hanging buckle movable rod 10 on the cover plate 2 from up to down, buckle it in the plate hang buckle fixed rod 8 on the bottom plate 1, install the rest of the hinge fixed support Seat 9 and the pin of hinge fixed body 11.

Close two pressure relief valves 4, and the underground diaphragm wall 6 gushing water temporary blockage is completed, and will no longer gushing water.

Grouting with cement or chemical grout on the back of the underground diaphragm wall 6 where the water gushes, finally the water gushing point is closed by grouting again through the pressure relief valve 4 to thoroughly seal the leaking point.

After the grout is solidified, open the pressure relief valve 4 to check the effect of blocking water gushing, remove the plugging device after passing the test, and recycle the plugging device after cleaning it.

To sum up, the rapid sealing device for underground diaphragm wall described in the utility model is simple in structure and light in weight; since it is structurally divided into two parts, it can be installed separately and is convenient for manual operation.

The device is easy to operate, fast in sealing speed and wide in scope of application. It is suitable for the sealing of water gushing at any height and any part of the underground diaphragm wall. It can effectively and quickly seal the working shaft where the space is narrow and there is no large-scale machinery. Gushing water.

It can be easily assembled and disassembled; it can be reused, which greatly reduces the cost of plugging.

The utility model is safe, reliable, efficient, economical and practical.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. a diaphragm wall fast plugging device, is characterized in that, comprises base plate (1) and capping plate (2); The steel plate that described base plate (1) is square-outside and round-inside shape, its periphery is provided with bolt hole (3), and the surrounding of its inner circle is provided with a plate and buckles fixed beam (8) and multiple hinge fixed bearing (9); Described capping plate (2) is circular steel plate, and its surrounding is provided with a plate and buckles moving bar piece (10) and multiple hinge fixed body (11), and its middle and lower part is provided with two pressure relief valves (4); Described plate buckles fixed beam (8) and described plate, and to buckle moving bar piece (10) suitable; Described hinge fixed bearing (9) and described hinge fixed body (11) suitable.

2. a kind of diaphragm wall fast plugging device according to claim 1, is characterized in that, the thickness of described base plate (1) and capping plate (2) is 16mm.

3. a kind of diaphragm wall fast plugging device according to claim 2, is characterized in that, the inner circle of described base plate (1) raises up 50mm.

4. a kind of diaphragm wall fast plugging device according to claim 3, is characterized in that, the inside of the inner circle of described base plate (1) is provided with sealing rubber ring (5).

5. a kind of diaphragm wall fast plugging device according to claim 1, is characterized in that, is provided with expansion bolt (7) in described bolt hole (3).

6. a kind of diaphragm wall fast plugging device according to claim 1, is characterized in that, the quantity of described hinge fixed bearing (9) and described hinge fixed body (11) is respectively 7.