CN218150974U - Shield in rich water soft soil stratum constructs and receives portal stagnant water sealing device - Google Patents

Abstract

The utility model discloses a water-stop sealing device for a shield receiving portal in water-rich soft ground, which is characterized in that it comprises: a steel ring for the portal, an elastic slurry-stop board, a flexible long-tail brush and a rubber cord board; the utility model adopts the The elastic anti-slip board, flexible long-tail brush and rubber cord board are connected to the steel ring of the embedded hole to form a sealing water-stop device, which can quickly block groundwater and ensure the quality of reinforcement without being visible. At the same time, multi-channel passive Water-stop sealing components can ensure the effect of grouting and isolate groundwater. When risks arise, a variety of active water-stop construction methods are used to completely eliminate the risk of water gushing and ensure construction quality and safety.

Description

Water-tight sealing device for shield receiving portal in water-rich soft soil stratum

technical field

The utility model belongs to the field of shield tunnel construction, and is mainly aimed at a water-stop sealing device for a shield receiving tunnel door in a water-rich soft soil layer where the end reinforcement of the shield method fails in the water-rich soft soil layer.

Background technique

In recent years, with the rapid development of urban modernization, the use of underground rail transportation space has greatly eased the pressure on urban traffic; among the tunnel construction methods, the shield tunneling method has the advantages of fast construction, no influence on the normal use of ground buildings and traffic, and shield tunneling in recent years. The rapid update and iteration of construction machinery using the construction method makes the shield tunneling method gradually become the mainstream tunnel construction method; in the construction process of the shield tunneling method, the general tunnel route will be divided into several sections, and there are launch shafts and reception shafts at the junction of each section. well; the shield machine starts to excavate from the originating shaft to the receiving shaft; in the process of normal excavation, construction safety is relatively easy to guarantee; the risk points of shield tunneling are mainly concentrated at the originating and receiving ends, and the originating and receiving ends of the shield tunneling And receiving is the key node of the shield method;

Shield tunneling construction is an underground project, and the construction effect is often invisible. It is difficult to do everything in engineering surveys, which makes it difficult to guarantee the project quality and construction safety of shield tunneling construction; the reinforcement of the shield end and water sealing are the top priorities. Heavy, poor quality of end reinforcement and improper water-stop facilities will directly cause a series of engineering accidents such as water gushing and sand gushing at the tunnel door, collapse of the tunnel face; the existing shield receiving water-stop sealing scheme is mainly composed of annular cord rubber plate, It is composed of annular pressing plate and hinge plate. The annular cord rubber plate is fixed on the outer annular outer wall of the receiving door of the excavated tunnel. The inner diameter of the annular cord rubber plate is smaller than the diameter of the opening door. On the outer ring, there are hinged plates evenly distributed along the outer circular arc on the outer surface of the annular pressure plate; but this combination of conventional rubber cord and hinged plate does not have good engineering effects in water-rich areas and is easily caused by rubber The curtain and the shield body of the shield machine cannot be tightly fitted, resulting in water gushing and sand gushing; because it cannot form an effective closed environment, it is also very easy to leak grout during grouting, resulting in economic losses and affecting the grouting effect; existing water-stop components often It is installed on the external ring beam, and it is easy to cause risks after the shield machine receives and removes the external ring beam.

Utility model content

The utility model provides a water-stop sealing device for a shield receiving portal in a water-rich soft soil layer, which can solve the problems of unsatisfactory reinforcement of the receiving end, collapse of the tunnel face, and water and sand gushing at the tunnel door in the water-rich soft soil layer; It can quickly isolate groundwater and ensure the quality of reinforcement without being visible; the use of multiple passive water-stop sealing components can ensure the effect of grouting and isolate groundwater. When risks arise, a variety of active water-stop construction methods can be used to completely eliminate the risk of water gushing Appear to ensure construction quality and construction safety.

In order to achieve the above-mentioned technical purpose, the technical solution adopted by the utility model is a water-tight sealing device for the shield receiving portal in the water-rich soft soil layer, including: a pre-buried door steel ring, an elastic slurry-stopping board, a flexible long-tail brush and rubber Cord plate; the steel ring of the embedded door opening is installed at the receiving door of the shield machine, the elastic stop plate and the flexible long brush are connected to the inner side of the steel ring of the embedded door opening, and the rubber cord plate is connected to the outside of the steel ring of the embedded door opening On the ring surface, the flexible long-haired brush is set at a distance of 75mm from the elastic stopper, and the elastic stopper, flexible long-tail brush and rubber cord board are connected to the steel ring of the embedded door opening to form a sealing and water-stop device;

Further, the inner ring cylinder of the pre-embedded door opening steel ring is set on the inner ring surface of the receiving door, the outer ring surface of the pre-embedded door opening steel ring is set on the side wall of the receiving door, and the pre-embedded door opening steel ring Form an L-shaped device with the outer ring surface;

Further, the elastic stop plate includes a fixed plate, a hinge chain, a folding plate, a counter pressure plate, a half-moon ring, an elastic member and a thrust plate. The fixed plate is welded at a position 200 mm from the edge of the steel ring of the door opening, and one end of the folding plate is hinged The chain is connected to the fixed plate, and the other end is connected to one end of the counter-pressure plate through a hinged chain. The outer side of the folding plate and the counter-pressure plate is connected to the fixed plate through an elastic member. The components can be freely rotated and moved so as not to affect the normal excavation of the shield machine and ensure that the components can closely fit the shield body of the shield machine; at the same time, there are half-moon rings on the fixed plate, folding plate and counter pressure plate.

Further, the flexible long-tail brush includes a fixing groove, a rear support plate, a front support plate, a wire brush and fixing bolts; the fixing groove is made of 5mm thick q235 steel, and the outer dimensions of the groove-shaped fixing member are 137mm in length, 250mm in width and 250mm in height. 30mm; the front and rear support plates are made of 2.5mm thick hrc44 heat-treated steel, the rear support plate is double-layered, the length of the first layer is 550mm, and the length of the second layer is 1/2 of the first layer; the angle between the rear support plate and the fixing groove is 50 °, the size of the first support plate is 550×250mm, the size of the second support plate is 275×200mm; the size of the front support plate is 445×250mm, and the angle between it and the fixing groove is 62°; the front support plate and the rear support plate The gaps are filled with flexible steel wire brushes after binding, and the fixing bolts use d10 type bolts to press and fix the fixing groove, rear support plate and front support plate; after the elastic stopper plate is installed, install the flexible long tail brush , during installation, the front and rear support plates of two adjacent flexible long-tail brushes overlap each other to form a complete ring surface;

Further, the rubber cord board includes an annular rubber cord, an annular pressure plate, a hinge fixing plate, a hinge plate, bolt washers and expansion bolts; the width of the annular rubber cord is 550mm, the inner diameter is 1750mm and the outer diameter is 2300mm, and the thickness of one side is 5mm; the annular pressure plate The inner diameter is 2100mm, and the exterior scene is 2200mm. Q235 steel is used to make ring-shaped steel plates with a thickness of 5mm. All the hinged plates are connected in series through the ring-shaped member set on the hinged plate. After the shield machine passes through the opening, the tensioner 901 set on the side wall is used to tighten the steel wire rope and press the rubber cord tightly on the shield machine shield. physically.

Beneficial effect

1. The utility model adopts horizontal cup-type freezing before the opening is broken and the shield is accepted; firstly, the three-layer freezing drilling of the middle ring, the outer ring, and the inner ring is adopted, and the freezing pipe is arranged by the following pipe method, which can deal with the water-rich soft soil site that is easy to In the case of water seepage and large water seepage, the amount of sediment gushing can be reduced; the utility model adopts freezing reinforcement in the water-rich site and then uses the wss grouting process to grout outside the range of freezing reinforcement with cement water glass double liquid slurry; freezing Reinforcement can significantly improve the strength of the soil and block the seepage path, and the external grouting of frozen soil can form a water-stop curtain to prevent groundwater from entering the cup-shaped freezing cup; thus, it can achieve a better pier head reinforcement effect from the perspective of strength and seepage; The grouting of frozen reinforced soil to the ground can control the surface frost heaving and thawing caused by freezing, and properly protect the normal use of the original buildings on the ground and underground pipelines; there are many drain holes on the side wall of the receiving shaft door for drainage The ground connection wall and the main body of the station maintain the water source in the cracks of the structure to ensure that no large holes will be formed at the entrance due to the impact of water flow, which will cause water gushing and sand gushing disasters;

2. The utility model adopts triple passive water-stop sealing components, which can stop the water in the whole process from the shield machine driving into the reinforced soil to completely driving out of the cave; the first elastic slurry-stop plate can rely on The driving force of the shield machine completes the deformation and homing; the shield machine advances to deform the paddle plate, the back pressure plate and the multi-thrust plate can perfectly adapt to the shield body orientation of the shield machine, and the thrust plate and the shield body fit together , multi-thrust plates can prevent a large amount of groundwater from flowing through the stop plate caused by broken small stones moving forward with the shield machine to block the stop plate; the front and rear support plates of the second ring-shaped flexible long tail brush can withstand 0.35mpa pressure , the deformation is not too large under the action of groundwater; after the receiving of the shield machine is completed, the long-tail brush and the elastic slurry plate will form a permanent water-stop structure, forming a good water-stop sealing effect;

3. In the utility model, the pre-buried steel ring of the door opening is pre-buried, and the rubber cord is installed on the steel ring of the pre-buried door opening, and the hinge plate is stretched to make the rubber cord close to the shield to form the third passive water-stop sealing member; The utility model reserves grouting holes in the last 10 ring segments. When the risk of water gushing is high, arc-shaped steel plates can be actively adopted to weld the shield body of the shield machine with the outer ring surface of the pre-embedded door opening steel ring, and then pass through the segments. The inner grouting hole is grouted to the outside, and the grouting and water-stopping effect can be directly observed; this active water-stopping measure can complete rapid water-stopping in the early stage of the water gushing disaster and prevent the development of water gushing and sand gushing, ensuring construction quality and construction safety; finally The outer wall of a ring segment is specially made of steel ring, which can be quickly completed when the risk of receiving water gushing is not great, and then the rubber cord is removed and the outer ring surface of the steel ring of the embedded door opening is welded to the outer steel wall with multiple arc-shaped steel plates to form a permanent stop. Water device; it can ensure the safety and normal use of the main structure in the later construction when the water pressure surges after the frozen soil is thawed.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the structure schematic diagram before the acceptance of the door sealing device in the utility model;

Fig. 2 is a side schematic view of the elastic slurry stop plate in the utility model;

Fig. 3 is a side view and a front view of a single piece of flexible long-tail brush in the door sealing device of the present invention;

Fig. 4 is the annulus schematic diagram of flexible long tail brush in the utility model;

Fig. 5 is a schematic cross-sectional view of the rubber cord in the utility model;

Fig. 6 is a schematic diagram of the annulus of the rubber cord in the utility model;

In the accompanying drawings, the list of parts represented by each label is as follows:

1-Embedded door opening steel ring, 101-Outer ring surface, 2-Elastic stop plate, 201-Fixed plate, 202-Hinge chain, 203-Folding plate, 204-Reverse pressure plate, 205-Half-moon ring, 206-Elastic member , 207-thrust plate, 3-flexible long tail brush, 301-fixing groove, 302-rear support plate, 303-front support plate, 304-wire brush, 305-fixing bolt, 4-rubber cord plate, 401-ring Rubber cord, 402-annular pressure plate, 403-folding fixed plate, 404-folding pressure plate, 405-bolt washer, 406-expansion bolt, 5-shield machine, 6-main side wall, 7-enclosure, 8- Freezing wall, 9-tightening device, 901-tensioning machine, 902-tightening wire rope.

detailed description

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 creative work all belong to the scope of protection of the present utility model.

Referring to Figures 1 to 6, a water-tight sealing device for a shield receiving portal in a water-rich soft soil stratum is characterized in that it includes: a pre-buried door opening steel ring 1, an elastic slurry stop plate 2, and a flexible long-tail brush 3 and rubber cord plate 4; the steel ring 1 of the embedded door opening is installed at the receiving door of the shield machine, the elastic stopper plate 2 and the flexible long-haired brush 3 are connected to the inner side of the steel ring 1 of the embedded door opening, and the rubber cord plate 4 It is connected to the outer ring surface 101 of the steel ring 1 of the embedded door opening, in which the flexible long-haired brush 2 is set at a distance of 75mm from the elastic stopper plate, and the elastic stopper plate 2, the flexible long-tail brush 3 and the rubber cord plate 4 are connected at the same time A sealing water-stop device is formed on the steel ring 1 of the embedded door opening;

The inner ring cylinder of the embedded door opening steel ring 1 is arranged on the inner ring surface of the receiving door, the outer ring surface 101 of the embedded door opening steel ring 1 is arranged at the side wall of the receiving door, and the embedded door opening steel ring 1 and the The outer ring surface 101 forms an L-shaped device;

The elastic stop plate 2 includes a fixed plate 201, a hinge chain 202, a folding plate 203, a counter pressure plate 204, a half-moon ring 205, an elastic member 106 and a thrust plate 107, and the fixed plate 201 is welded to the door opening steel ring 1 near the edge 200mm position, one end of the folding plate 203 is connected to the fixed plate 201 through the hinge chain 202, and the other end is connected to one end of the counter pressure plate 204 through the hinge chain 202, and the outer side of the folding plate 203 and the counter pressure plate 204 is connected to the fixed plate 201 through the elastic member 206. The other side of the counter pressure plate 204 is provided with multiple thrust plates 207 to ensure that each component can freely rotate and move so as not to affect the normal excavation of the shield machine and to ensure that the components can closely fit the shield body of the shield machine; at the same time, the fixed plate, folding There is a half-moon ring on the plate and the counter pressure plate;

The flexible long-tail brush includes a fixing groove 301, a rear support plate 302, a front support plate 303, a wire brush 304 and a fixing bolt 305; the fixing groove 301 adopts q235 steel to make a groove-shaped fixing member whose external dimensions are 137mm long and 250mm wide. The height is 30mm; the front and rear support plates are made of 2.5mm hrc44 heat-treated steel, the rear support plate is double-layered, the length of the first layer is 550mm, and the length of the second layer is 1/2 of the first layer; the angle between the rear support plate 302 and the fixing groove 301 is 50°, the size of the first support plate is 550×250mm, the size of the second support plate is 275×200mm; the size of the front support plate 303 is 445×250mm, and the angle between it and the fixing groove 301 is 62°; between the front and rear support plates Use flexible steel wire brushes to bind and fill, and the fixing bolts are D10-type bolts to press and fix the above components; after the installation of the elastic stop board, install the flexible long-tail brushes, and connect two adjacent flexible long-tail brushes during installation. The front and rear support plates overlap each other to form a complete ring;

The rubber cord plate includes an annular rubber cord 401, an annular pressure plate 402, a hinge fixing plate 403, a hinge plate 404, bolt washers 405 and expansion bolts 406; the annular rubber cord 401 has a width of 550 mm, an inner diameter of 1750 mm and an outer diameter of 2300 mm, and a thickness of one side 5mm; ring plate 402 inner diameter 2100mm, exterior 2200mm is made of q235 steel ring plate with thickness 5mm; hinge plate 404 adopts single piece width 150mm, fixed plate length 150mm hinge plate length 200mm; each hinge plate uses two expansion bolts Fixed; Tighten the steel wire rope 902 through the ring-shaped member set on the hinge plate to connect all the hinge plates in series. After the shield passes through the opening, tighten the steel wire rope through the tensioner 901 set on the side wall to tighten the rubber cord. Press it tightly on the shield body of the shield machine.

The utility model is further explained in conjunction with the engineering examples: the example is aimed at a ground shield construction project in a water-rich soft soil site. The depth is relatively shallow, which is the mixed water level and phreatic water level; the silt layer is the main aquifer, the hydraulic connection between the layers is weak, the water permeability is average, and it mainly receives atmospheric precipitation recharge, and the overall water richness is medium; affected by the fluctuation of the aquifer level, it has a slight Pressure-bearing, the confined water in the area of the proposed station is mainly stored in the silt, silt and other aquifers below the foundation pit floor of the station; due to the thick silt layer and abundant groundwater, horizontal freezing reinforcement and wss grouting reinforcement are adopted the way of combining;

The specific implementation steps and design parameters are as follows:

1. The designed freezing wall size is 9.5 meters long, the wall thickness is 2.5 meters, and the bottom of the cup is 4 meters thick; the layout of the freezing pipes is shown in Figure 1, and the long freezing pipe is 13.5 meters long and the short pipe is 3.3 meters d89×9mm; the average temperature of the freezing wall is designed -10°C, three layers of outer ring, inner ring and middle ring are adopted, with 34 freezing holes in the outer ring, 15 in the middle ring, and 9 in the inner ring; the radius of the outer ring is 3425mm, the radius of the middle ring is 2750mm, and the radius of the inner ring is 1873mm; Compressibility, in order to prevent groundwater from entering the freezing cup and damaging the reinforcement of the bottom of the cup, the wss grouting process is adopted, and the freezing is reinforced with cement water glass double slurry; A liquid is cement slurry, and the cement ratio is cement 385kg: 385L water, B The liquid is water glass, the ratio of sodium silicate to water is 1:1, the grouting pressure is 0.6mpa, the grouting range is 3 meters from the frozen soil, and the frozen wall goes up to the ground; after the grouting is completed, the Grouting reinforcement soil drilling sampling, the unconfined compressive strength of the soil is not less than 1mpa, and the permeability coefficient of the soil is less than 1×10*-6cm/s;

2. At the same time, in order to ensure that the water level at the end is below the bottom of the tunnel, in order to prevent the soil from collapsing due to the high groundwater level during the arrival process, a pressure relief hole is made on the side wall of the tunnel door to drain the water between the connecting wall and the main maintenance structure of the station. Water source, in order to achieve a better precipitation effect, set pressure relief holes at 12, 6, 3, and 9 o'clock on the side wall of the cave;

3. To install the door sealing device, first install the rubber cord board 101 on the outer ring plate 101 of the pre-buried door opening steel ring 1 outside the door. Fixing plate 403, hinge plate 404, bolt washer 405 and expansion bolt 406; then weld the annular elastic stopper 2 at a distance of 200mm from the inner edge of the steel ring of the embedded door opening; install a flexible long-tail brush at a distance of 75mm 3. When installing, overlap the front and rear support plates of two adjacent long-tail brushes and fill the water-stop expansion grease between the wire brushes;

4. Before the shield machine arrives at the reinforcement of the portal, remove the portal in advance. Before the portal is broken, open 7 temperature measuring holes radially on the portal. Pneumatic picks are used to drill holes with a diameter of 40 mm and a depth of 200 to 400 mm. After the probe hole is drilled, the probe hole can be drilled with an electric hammer to penetrate the remaining ground connection wall and enter the frozen soil. The probe hole enters the depth of the frozen soil. Control it at 10-15cm; use a high-precision thermometer or thermometer to measure the soil temperature and observe whether there is water seepage; in principle, the wall can be partially broken after freezing for 25 days. During the process of partial wall breaking, if water seepage is found If there is no abnormal situation, you can directly go to the next layer of wall breaking; the wall breaking cannot be completed at one time, and it should be peeled off in 4 layers. The thickness of the connecting wall is 100mm, and the steel bars are reserved to protect the frozen soil wall; when the temperature measured by the probe hole is judged that the frozen soil wall and the ground connecting wall are completely and reliably cemented, the wall can be completely broken, and the last layer of the ground connecting wall structure is chiseled out (hole The last layer of the door should not be cut for more than 1 day) to prevent the permafrost wall from melting and affect its strength; the last layer of wall breaking must be carried out in layers and blocks to prevent damage to the permafrost wall and cause adverse consequences;

5. After the assembly of each ring segment of the shield machine is completed, advance forward. After passing through the elastic stop plate and the flexible long-tail brush, the steel wire rope is gradually tightened by the tensioning machine, so that the rubber cord fits the shield body of the shield machine ; After discovering water seepage in the gap between the portals, treat it with caution; at this time, stop the excavation of the shield machine, and use multiple arc-shaped steel plates to weld the shield tail of the shield machine and the outer ring surface of the embedded doorway steel ring to each other. The arc-shaped steel plates are also tightly welded to form a completely closed grouting environment; open the reserved grouting holes inside the segment, inject the quick-setting cement slurry and wait for it to stabilize, open the valve of the grouting hole to observe whether there is water flow; after confirming that the gap is tight Remove the welded steel plates in the order of up and down, and the shield machine continues to move forward until the receiving is completed; when there is no obvious water seepage in the gap between the shield machine and the steel ring of the embedded door opening, drive the shield machine out to remove the rubber cord; To prevent water gushing caused by the sudden increase of water pressure after the frozen soil is thawed, the last ring segment adopts a special steel outer wall; multiple arc-shaped steel plates are used to weld the outer ring surface of the pre-embedded door opening steel ring and the steel outer wall of the segment. The shaped steel plates are also tightly welded;

6. Unfreeze the shield after receiving it. At this time, refill the frozen wall with grout; use the grouting holes reserved on the segment, and the range is the grouting hole on the 10-ring segment inward from the portal; The compensation grouting slurry is mainly cement single slurry, and the grouting pressure is 0.4MPa; the grouting range is 10 rings inside the portal; the grouting is performed sequentially from the bottom, then both sides, and finally the top; The grouting hole in the middle begins to grout, and then pours to the grouting holes at both ends in turn; during the grouting process, follow the principle of multi-point, small amount, multiple times, and uniform step-by-step; when the settlement of the end of the shield within one day is greater than 0.5mm/d , or when the cumulative settlement of the end of the shield is greater than 3mm, the grouting for thawing compensation should be performed; when the end of the shield is uplifted by 3.0mm, the grouting should be suspended; the end of the thawing grouting is based on the stability of the ground subsidence deformation; The wall has completely melted, and the measured formation subsidence lasts for one month and every half month is no more than 0.5mm, and the grouting for melt settlement compensation can be stopped; at the same time, the grouting time is not less than three months; it is determined to stop the melt settlement compensation according to the ground subsidence monitoring data After the grouting, the last grouting is directly injected into the cement water glass double liquid slurry to close the grouting valve. After the grouting is completed, when the grouting strength reaches more than 80% of the final strength, open the grouting valve and confirm that no water flows out, indicating that the grouting The hole has been sealed and compacted. Remove the grouting valve and steel pipe, wrap the raw material tape on the grouting pipe, and seal the grouting hole with a wire plug. At this time, the special project for shield tunneling is over.

To sum up, 1. The utility model adopts horizontal cup-type freezing before the opening door is broken and the shield is accepted; firstly, three-layer freezing drilling is adopted in the middle ring, outer ring, and inner ring, and the freezing pipe is set by the follow-up pipe method, which can deal with rich water The soft soil site is prone to water seepage and the water seepage is large, reducing the amount of sediment gushing out; the utility model adopts freezing reinforcement in the water-rich site and then uses the wss grouting process to use cement water glass double liquid slurry in the range of freezing reinforcement External grouting; freezing reinforcement can significantly improve the strength of the soil and block the seepage path, and external grouting of frozen soil can form a water-stop curtain to prevent groundwater from entering the cup-shaped freezing cup; thus achieving a better pier from the perspective of strength and seepage The head reinforcement effect; grouting from the frozen reinforced soil to the ground can control the surface frost heaving and thawing caused by freezing, and properly protect the normal use of the original buildings on the ground and underground pipelines; A drain hole is used to drain the water source between the ground connection wall and the main maintenance structure of the station, so as to ensure that no large cavity will be formed at the entrance due to the impact of water flow, which will cause water and sand gushing disasters;

2. The utility model adopts triple passive water-stop sealing components, which can stop the water in the whole process from the shield machine driving into the reinforced soil to completely driving out of the cave; the first elastic slurry-stop plate can rely on The driving force of the shield machine completes the deformation and homing; the shield machine advances to deform the paddle plate, the back pressure plate and the multi-thrust plate can perfectly adapt to the shield body orientation of the shield machine, and the thrust plate and the shield body fit together , multi-thrust plates can prevent a large amount of groundwater from flowing through the stop plate caused by broken small stones moving forward with the shield machine to block the stop plate; the front and rear support plates of the second ring-shaped flexible long tail brush can withstand 0.35mpa pressure , the deformation is not too large under the action of groundwater; after the receiving of the shield machine is completed, the long-tail brush and the elastic slurry plate will form a permanent water-stop structure, forming a good water-stop sealing effect;

3. In the utility model, the pre-buried steel ring of the door opening is pre-buried, and the rubber cord is installed on the steel ring of the pre-buried door opening, and the hinge plate is stretched to make the rubber cord close to the shield to form the third passive water-stop sealing member; The utility model reserves grouting holes in the last 10 ring segments. When the risk of water gushing is high, arc-shaped steel plates can be actively adopted to weld the shield body of the shield machine with the outer ring surface of the pre-embedded door opening steel ring, and then pass through the segments. The inner grouting hole is grouted to the outside, and the grouting and water-stopping effect can be directly observed; this active water-stopping measure can complete rapid water-stopping in the early stage of the water gushing disaster and prevent the development of water gushing and sand gushing, ensuring construction quality and construction safety; finally The outer wall of a ring segment is specially made of steel ring, which can be quickly completed when the risk of receiving water gushing is not great, and then the rubber cord is removed and the outer ring surface of the steel ring of the embedded door opening is welded to the outer steel wall with multiple arc-shaped steel plates to form a permanent stop. Water device; it can ensure the safety and normal use of the main structure in the later construction when the water pressure surges after the frozen soil is thawed.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the description of the present invention. In at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not exhaust all details, nor do they limit the utility model to the specific implementations described. Obviously, many modifications and variations can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. The invention is to be limited only by the claims and their full scope and equivalents.

Claims (5)

1. The water-tight sealing device of the shield receiving portal in the water-rich soft soil stratum, which is characterized in that it includes: a steel ring for the embedded door opening, an elastic slurry stop board, a flexible long-tail brush and a rubber cord board; the embedded door opening The steel ring is installed at the receiving door of the shield machine, the elastic stop plate and the flexible long-haired brush are connected to the inner side of the steel ring of the embedded door opening, and the rubber cord board is connected to the outer ring surface of the steel ring of the embedded door opening, and the flexible long-haired The brush is set at a distance of 75mm from the elastic stopper, and the elastic stopper, flexible long-tail brush and rubber cord board are connected to the steel ring of the pre-buried hole to form a sealing and water-stop device. 2. According to claim 1, the water-tight sealing device of the shield receiving portal in the water-rich soft soil stratum is characterized in that, the inner ring cylinder of the pre-embedded door opening steel ring is arranged on the inner ring surface of the receiving portal , the outer ring surface of the steel ring of the embedded door opening is set at the side wall of the receiving door, and the steel ring of the embedded door opening and the outer ring surface form an L-shaped device. 3. According to claim 1, the water-tight sealing device for the shield receiving portal in the water-rich soft soil stratum is characterized in that, the elastic slurry-stopping plate includes a fixed plate, a hinge chain, a folding plate, a counter-pressure plate, and a half-moon ring , Elastic member and thrust plate, the fixed plate is welded at the position of 200mm near the edge of the steel ring of the door opening, one end of the folding plate is connected to the fixed plate through a hinge chain, and the other end is connected to the end of the counter pressure plate through a hinge chain, the outer side of the folding plate and the counter pressure plate Connected to the fixed plate through elastic components, there are multiple thrust plates on the other side of the counter pressure plate to ensure that the elastic components can rotate and move freely so as not to affect the normal excavation of the shield machine and ensure that the components can closely fit the shield body of the shield machine ; At the same time, a half-moon ring is provided on the fixed plate, the folding plate and the counter pressure plate. 4. The water-tight sealing device for the shield receiving portal in the water-rich soft soil stratum according to claim 1, wherein the flexible long tail brush includes a fixed groove, a rear support plate, a front support plate, a wire brush and Fixing bolts; the fixing groove is made of 5mm thick q235 steel. The length of the second layer is 1/2 of the first layer; the angle between the rear support plate and the fixing groove is 50°, the size of the first layer support plate is 550×250mm, and the size of the second layer support plate is 275×200mm; The size of the support plate is 445×250mm, and the angle between it and the fixing groove is 62°; the front support plate and the rear support plate are bound with a flexible wire brush and then filled, and the fixing bolts are d10 bolts to connect the fixed groove, the rear The support plate and the front support plate are compressed and fixed; the flexible long-tail brush is installed after the elastic stopper is installed, and the front and rear support plates of two adjacent flexible long-tail brushes are overlapped to form a complete ring during installation. 5. According to claim 1, the water-tight and sealing device for the shield receiving tunnel door in the water-rich soft soil stratum is characterized in that, the rubber cord board comprises a ring-shaped rubber cord, a ring-shaped pressing plate, a hinge fixing plate, and a hinge pressing plate , Bolt washer and expansion bolts; the width of the annular rubber cord is 550mm, the inner diameter is 1750mm, the outer diameter is 2300mm, and the thickness of one side is 5mm; the inner diameter of the annular pressure plate is 2100mm, and the outer scene is 2200mm. The length of the fixed plate is 150mm. The length of the folding plate is 200mm; each folding plate is fixed with two expansion bolts; the tightening steel wire rope passes through the ring-shaped member set on the folding plate to connect all the folding plates in series, and passes through the hole in the shield Behind the door, the tensioner (901) arranged on the side wall tightens the steel wire rope to press the rubber cord tightly on the shield body of the shield machine.

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