CN214194494U

CN214194494U - Equipment for preventing concrete material from flowing around during construction of diaphragm wall for isolating river water seepage

Info

Publication number: CN214194494U
Application number: CN202023331679.2U
Authority: CN
Inventors: 黎曦彤; 张问科; 沈远志; 王志超; 肖德祥
Original assignee: Zhongdi Junhao Hi Tech Co ltd
Current assignee: Zhongdi Junhao Hi Tech Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-09-14
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a device for preventing concrete material from flowing around during construction of a diaphragm wall for isolating river water seepage, which comprises a water bag with a convex cross section, wherein the left side and the right side of the water bag are respectively and tightly propped against the left side wall and the right side wall of an odd unit groove section, the front side of the water bag is tightly propped against the back surface of an I-shaped steel joint web plate, and the left step surface and the right step surface of the water bag are respectively and tightly propped against the left flange plate and the right flange plate of the I-shaped steel joint; the equipment also comprises a water supply pipe communicated with the upper opening of the water bag, and the water supply pipe is provided with a pressure gauge and a stop valve. The equipment is simple, convenient and quick to mount or dismount, and good in streaming prevention effect.

Description

Equipment for preventing concrete material from flowing around during construction of diaphragm wall for isolating river water seepage

Technical Field

The utility model relates to an underground continuous wall construction technical field, specific saying is the equipment that prevents the concrete material and flow around of using when constructing the diaphragm wall of isolated river water seepage flow.

Background

The underground continuous wall is a mature underground building structure and is mainly applied to a retaining structure of a foundation pit, an outer wall of a basement of a building and the like. The ground connecting wall designed by the application is the ground connecting wall of a building or a structure which is positioned in the influence range of a river, such as the range of 100 meters at the two sides of the river. Because the groundwater osmotic pressure in the range is larger, the requirement of the impervious grade of the diaphragm wall for isolating the river water seepage is inevitably higher, and the diaphragm wall is generally required to be impervious under the water pressure of 1.2 Mpa.

The construction mode of the diaphragm wall is generally as follows: excavating a plurality of odd unit groove sections in underground jumping width by using trenching equipment such as a bucket excavator, synchronously grouting a protective wall during excavation, welding two ends of an odd reinforcing cage with two I-steel joints, synchronously sinking the reinforcing cage and the two I-steel joints into the odd unit groove sections, and pouring and tamping concrete to form odd reinforced concrete walls; then, even unit groove sections are excavated between the two sections of the reinforced concrete wall panels in odd sections, the slurry is used for protecting the wall in the excavating process, then the reinforcement cages in even sections are placed, and concrete is poured to form the reinforced concrete wall panels in even sections. At the moment, the odd and even sections of reinforced concrete wall panels jointly form a horizontally extending and continuous reinforced concrete wall.

The underground diaphragm wall is special in position, needs to play a role in isolating river water seepage, and is high in requirement on seepage resistance level, so that the problem of concrete seepage prevention is particularly required to be considered during construction. Specifically, when odd-number unit groove sections are placed with odd-number steel reinforcement cages and two I-steel joints, because a gap exists between each I-steel joint and the end wall and the side wall of the groove section on the same side, when odd-number-section concrete is poured, concrete enters the back of the I-steel joint along the gap between the I-steel joint and the side wall of the groove section, and streaming concrete is formed. The part of the streaming concrete and mud can be deposited on the back of the I-shaped steel joint, and before an even number section of reinforcement cage is placed and concrete is poured subsequently, the streaming concrete and mud at two ends of the even number unit groove section, namely the back of the I-shaped steel joint at two sides, must be cleaned up, otherwise, the strength, the bearing capacity and the anti-permeability grade of the final underground diaphragm wall are influenced by too much mud. The treatment mode in the prior art is that a large amount of clay-filled nylon bags are used for plugging gaps between the buried I-steel joints and the end walls and the side walls of the odd unit groove sections in advance before the odd-section concrete is poured, so that the concrete is prevented from flowing around; after the odd-number section concrete is poured and hardened, when the even-number unit groove sections are excavated, the nylon bags are excavated from the two ends of the even-number unit groove sections. However, the above-mentioned plugging method of the nylon bag still has the following disadvantages: firstly, the workload of the landfill plugging process is large, the depth of the groove section of the diaphragm wall is large, a large number of nylon bags need to be thrown from the groove bottom to the ground for plugging and burying all the time, and the time and the labor are consumed; similarly, the process of drawing all the nylon bags out of the slurry in the groove section is time-consuming and labor-consuming, the labor intensity is high, and the consumed working hours are large; moreover, the nylon bag can not completely block and block the streaming of concrete, a small part of streaming concrete can be bonded with the nylon bag, the nylon bag is harder to take out after being hardened, and the nylon bag is broken when being taken out, so that clay in the nylon bag is diffused into a groove section, the condition of mud clamping is further increased, and the anti-permeability grade of the diaphragm wall is further reduced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an installation or dismantle all simple convenient and fast and prevent the equipment that prevents concrete material from streaming when constructing the underground diaphragm wall of the effectual isolated river water seepage flow of streaming.

The technical solution of the utility model is that, the utility model provides a device for preventing concrete material from flowing around during the construction of underground diaphragm wall for isolating river water seepage, which comprises a water bag with a convex cross section, wherein the left and right side surfaces of the water bag are respectively pressed against the left and right side walls of odd unit groove sections, the front side surface of the water bag is pressed against the back surface of an I-shaped steel joint web plate, and the left and right step surfaces of the water bag are respectively pressed against the left and right flange plates of the I-shaped steel joint; the equipment also comprises a water supply pipe communicated with the upper opening of the water bag, and the water supply pipe is provided with a pressure gauge and a stop valve.

Compared with the prior art, the device for preventing concrete material from flowing around for the construction of the diaphragm wall for isolating river water seepage has the following advantages.

Firstly, analyzing the working process of the device: after an I-shaped steel joint and an odd-number section reinforcement cage are immersed into an odd-number unit groove section, the water bag is placed into a gap between the end part of the odd-number unit groove section and the I-shaped steel joint, a stop valve of a water supply pipe is opened to inject water into the water bag, and the stop valve is closed when a pressure gauge monitors that the water pressure of the water bag reaches a peak value, namely the water bag is completely expanded; at the moment, the left side surface and the right side surface of the water bag are respectively abutted against the left side wall and the right side wall of the odd unit groove sections, the front convex part of the water bag extends into the space between the two flange plates of the I-steel joint, the front side surface of the water bag is abutted against the back surface of the I-steel joint web plate, and the left step surface and the right step surface of the front part of the water bag are respectively abutted against the left flange plate and the right flange plate of the I-steel joint, so that the water bag pertinently seals the gap between the two flange plates of the I-steel joint and the side wall corresponding to the odd unit groove sections, the closed joint tightly blocks the route of the concrete streaming, and the space between the I-steel joint and the end parts of the odd unit groove sections is filled after the main water bag expands, so that stable and continuous support is provided for the plugging of the streaming channel, the efficiency of the water bag for plugging the water bag is further ensured, and the best effect of preventing the concrete streaming is obtained; moreover, the device is simple to assemble, only needs to hoist the water bag into odd unit groove sections and flush, and also only needs to pump water and then hoist the water bag out in the disassembly process, so that the assembly and disassembly processes are simple, rapid and convenient, the labor cost is low, and the construction speed is high.

Preferably, a vertical rubber raised line is arranged on the front side surface of the water bag, a plurality of pressure sensors with different heights are arranged on the rubber raised line, all the pressure sensors are in signal connection with a main controller, and the main controller is in signal connection with an alarm device; therefore, the functions are added, when the odd number of unit groove sections are filled with concrete, the concrete is filled from bottom to top, the lower pressure is too high, the bottom end of the I-shaped steel joint is likely to be pushed outwards, and the upper end of the I-shaped steel joint is likely to be overturned inwards, and once the condition occurs, the overturned I-shaped steel can crush the reinforcement cage, so that the bearing capacity and the strength of the whole section of concrete wall are damaged; and a vertical pressure sensor is arranged on the front side of the water bag, so that the concrete pouring process can be accurately detected, if the measured values of the pressure sensors sequentially rise to a reasonable range from bottom to top, the concrete pouring process is normal, if the measured value of one pressure sensor at the lower part is suddenly increased and the measured values of other pressure sensors at the upper part originally have sudden drop, the I-steel cannot resist the concrete pouring pressure and is integrally and inwards overturned, and a main controller collecting the measured values informs an alarm device to alarm, reminds workers to rework, and re-hoists the reinforcement cage and the I-steel joint.

Preferably, the upper end and the lower end of the water bag are respectively fixed with an upper hard convex supporting disk and a lower hard convex supporting disk, and the front side surface of each supporting disk is provided with an electromagnet for adsorbing the back surface of the I-steel joint web plate; the left side surface and the right side surface of the water bag are respectively provided with a plurality of barbs used for preventing the I-shaped steel joint from being pushed and covered by concrete materials when the odd-number unit groove sections are filled with concrete; thus, when the water bag is installed, the water bag is lifted to the odd unit groove sections, then the electromagnet is electrified, so that the upper hard convex supporting disc and the lower hard convex supporting disc are firmly adsorbed and clamped at the correct positions between the two flange plates of the I-shaped steel joint, and then the water bag is flushed, so that the barbs on the two side surfaces of the expanded water bag are inserted into soil bodies on the two side walls of the odd unit groove sections; therefore, when the odd number unit groove sections are filled with concrete, the resistance generated by the side barbs of the water bag resists the side pressure generated by the filled concrete, the vertical H-shaped steel joint is ensured, and the odd number section steel reinforcement cage can resist the pressure of the filled concrete and can not be loosened; moreover, the assembly process is simple and convenient, after the water bag is lifted, the upper hard supporting disk and the lower hard supporting disk are quickly positioned by the adsorption of the electromagnet, and the water bag is fixed by flushing, so that the equipment is quick and convenient, and the assembly is firm and reliable.

Drawings

Fig. 1 is a schematic structural view of the apparatus for preventing concrete from flowing around.

Fig. 2 is a schematic structural view of fig. 1 after the angle is deflected and the i-steel joint is pulled apart.

Fig. 3 is an enlarged schematic view of a portion a of fig. 1.

Fig. 4 is an enlarged schematic structural view of a portion B in fig. 2.

Fig. 5 is a schematic view of the overhead structure of the device for preventing concrete from flowing around when the device is placed in the odd number unit groove sections.

The water bag comprises a water bag body 1, a step face 1.1, odd unit groove sections 2, odd unit groove sections 2.1, side walls 3, I-shaped steel joints 3.1, web plates 3.2, flange plates 4, water supply pipes 5, stop valves 6, rubber raised lines 7, pressure sensors 8, support plates 9, electromagnets 10 and barbs.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

As shown in fig. 1 to 5, the device for preventing concrete material from flowing around in the construction of the diaphragm wall for isolating the water seepage of rivers of the utility model comprises a hollow rubber water bag 1 with a convex cross section. After the water bag 1 is expanded, the left side surface and the right side surface of the water bag 1 are respectively tightly abutted against the left side wall and the right side wall 2.1 of the odd-numbered unit groove section 2, the front convex part of the water bag 1 extends into the space between the two flange plates 3.2 of the I-shaped steel joint 3, the front side surface of the front convex part is tightly abutted against the back surface of a web plate 3.1 of the I-shaped steel joint 3, and the left step surface and the right step surface 1.1 of the water bag 1 are respectively tightly abutted against the left flange plate 3.2 and the right flange plate 3.2 of the I-shaped steel joint 3; thus, the gap between the side wall 2.1 of the odd unit groove section 2 and the flange plate 3.2 of the I-steel joint 3, namely the channel for the concrete material to flow around is completely closed.

The equipment also comprises a water supply pipe 4 communicated with the opening on the water bag 1, and the water supply pipe 4 is provided with a pressure gauge and a stop valve 5.

The equipment also comprises a main controller and an alarm device. The front side surface of the water bag 1 is provided with a vertical rubber convex strip 6, and the rubber convex strip 6 and the rubber shell of the water bag 1 body are integrally formed. The rubber convex strips 6 are provided with a plurality of pressure sensors 7 with different heights, all the pressure sensors 7 are in signal connection with the main controller, if the pressure sensors 7 are connected with the main controller through signal wires, and the signal wires can be embedded in the rubber convex strips 6. The main controller is also in signal connection with the alarm device.

The upper end and the lower end of the water sac 1 are respectively fixed with an upper hard convex supporting disk 8 and a lower hard convex supporting disk 8, and the shape of the supporting disks 8 is the same as the shape of the cross section of the water sac 1. The front side surface of each supporting disk 8 is provided with an electromagnet 9 for adsorbing the back surface of a web plate 3.1 of the I-steel joint 3; the battery of the electromagnet 9 is embedded inside the support disc 8. Two sides are equipped with many barbs 10 respectively about water pocket 1, and all barbs 10 are inwards, that is to say to the direction slope that is close to I-steel joint 3 to prevent that I-steel joint 3 from being pushed inwards by the concrete material and covering when odd unit groove section 2 pours the concrete.

Claims

1. The utility model provides an equipment that prevents concrete material and flow around that uses when constructing of diaphragm wall of isolated river water seepage flow which characterized in that: the water bag comprises a water bag (1) with a convex cross section, wherein the left side surface and the right side surface of the water bag (1) are respectively tightly abutted against the left side wall and the right side wall (2.1) of an odd unit groove section (2), the front side surface of the water bag (1) is tightly abutted against the back surface of a web plate (3.1) of an I-shaped steel joint (3), and the left step surface and the right step surface (1.1) of the water bag (1) are respectively tightly abutted against the left flange plate and the right flange plate (3.2) of the I-shaped steel joint (3); the equipment also comprises a water supply pipe (4) communicated with the upper opening of the water bag (1), and the water supply pipe (4) is provided with a pressure gauge and a stop valve (5).

2. The apparatus for preventing concrete material from flowing around in construction of diaphragm wall for isolating river water according to claim 1, wherein: the front side of the water bag (1) is provided with a vertical rubber raised line (6), a plurality of pressure sensors (7) with different heights are arranged on the rubber raised line (6), all the pressure sensors (7) are in signal connection with a main controller, and the main controller is in signal connection with an alarm device.

3. The apparatus for preventing concrete material from flowing around in construction of diaphragm wall for isolating river water according to claim 2, wherein: an upper hard convex supporting disk and a lower hard convex supporting disk (8) are respectively fixed at the upper end and the lower end of the water bag (1), and an electromagnet (9) for adsorbing the back of a web plate (3.1) of the I-steel joint (3) is arranged on the front side surface of each supporting disk (8); the left side and the right side of the water bag (1) are respectively provided with a plurality of barbs (10) for preventing the I-shaped steel joints (3) from being pushed over by concrete materials when the odd-number unit groove sections (2) are filled with concrete.