Splicing type water storage back pressure emergency sleeve, double-layer sleeve water storage back pressure water burst plugging system and construction method of double-layer sleeve water storage back pressure water burst plugging system

Abstract

The invention provides a splicable water storage back pressure emergency steel sleeve, a double-layer sleeve water storage back pressure water gushing plugging system and a construction method thereof. The rapid splicing of the emergency steel sleeve can be realized, the height of the emergency steel sleeve can be rapidly increased, and the water storage back pressure effect can be improved. The water storage back pressure emergency sleeve capable of being spliced is characterized by comprising more than one sleeve section which is coaxially spliced, the shell ring is divided into a diameter shell ring and a circular-truncated-cone-shaped shell ring, so that an equal-diameter emergency sleeve or a circular-truncated-cone-shaped emergency sleeve can be spliced; the shell ring comprises a shell body, a crawling ladder, a water outlet and a connecting structure used for achieving axial splicing. A crawling ladder is arranged on the outer circumference of the cylinder body in the height direction; a drainage opening with a drainage switch is formed in the upper part of the barrel body; the connecting structure is used for sealing connection between two shell rings.

Description

Technical Field

[0001] The invention relates to an emergency sleeve and a construction method thereof, in particular to a splicable water storage back pressure emergency sleeve and a construction method thereof, belonging to the technical field of foundation pit water gushing treatment equipment. Background Art

[0002] At present, in the construction of deep foundation pits with underground pressurized water, when the bottom treatment measures of the foundation pit are improper or other unexpected situations occur, foundation pit water gushing accidents are prone to occur. The common methods for dealing with water gushing accidents are backfilling, water storage counter pressure, and plugging. The schematic diagram of water storage counter pressure is shown in the figure below. Fig.14 As shown in the figure, the foundation pit "water storage counter pressure" method is used to control foundation pit water inrush. Generally, water is injected into the foundation pit. When the water head is the same as the pressure head or the water head outside the pit, the foundation pit water inrush is controlled, preventing more serious safety accidents. However, if the underground pressure water volume is huge and the head pressure difference is large, it is extremely difficult to control the water inrush in a short time using traditional methods, which is easy to cause major safety accidents. At the same time, it will also increase the workload of the project, extend the construction period, and reduce the economic benefits.

[0003] The main function of the steel sleeve in dealing with water inrush accidents is to determine the water inrush point and store water. Figure 1 As shown in the figure, when water gushed out of the foundation pit, an emergency steel sleeve was placed at the water gushing outlet at the bottom of the foundation pit to encircle the water gushing outlet; the water gushing out of the water gushing outlet was stored in the emergency steel sleeve, and then a water pump was used to pump out the water stored in the steel sleeve; finally, water plugging was performed on the outside of the steel sleeve. However, when the amount of water gushing out was huge and the water head pressure was huge, water plugging could not be performed, and the water storage function of the steel sleeve would fail. The only way to deal with the water gushing accident was to use other methods such as water storage counter pressure of the entire foundation pit, which greatly wasted the construction period.

[0004] In summary, the main use of the existing emergency steel sleeve is to place the emergency steel sleeve in the foundation pit to encircle the water inflow and store the used groundwater. However, the existing steel sleeve is usually of fixed height and cannot be increased in height; due to the limited height of the steel sleeve, the water storage capacity is weak, and the water storage counterpressure effect is small. When encountering a high pressure water inflow, it cannot play an obvious water storage counterpressure role. Summary of the invention

[0005] In view of this, in order to solve the problem that the emergency steel sleeve cannot be spliced ​​and the height cannot be increased, the present invention provides a splicable water storage and counter-pressure emergency steel sleeve, which can realize the rapid splicing of the emergency steel sleeve, quickly increase the height of the emergency steel sleeve, and improve the water storage and counter-pressure effect.

[0006] The technical solution of the present invention is: a splicable water storage back pressure emergency steel sleeve, comprising: more than one coaxially spliced ​​cylinder section;

[0007] The cylinder section is divided into a diameter cylinder section and a truncated cone cylinder section, which can be spliced ​​into an equal-diameter emergency sleeve or a truncated cone emergency sleeve;

[0008] The cylinder section comprises: a cylinder body, a ladder, a drain port and a connection structure for realizing axial splicing; the outer circumference of the cylinder body is provided with a ladder along the height direction; the upper part of the cylinder body is provided with a drain port with a drain switch;

[0009] The connection structure is used for sealing connection between two cylinder sections.

[0010] As a preferred embodiment of the present invention, the connection structure comprises: a flange and a sealing rubber ring; a flange is welded at each axial end of the barrel; and a sealing rubber ring is installed between the two butted flanges during splicing.

[0011] As a preferred embodiment of the present invention, the two flanges are fixedly connected by bolts; wherein the end surface of the flange at the upper end of the barrel is provided with a plurality of arc-shaped holes evenly spaced along the circumferential direction as bolt connection holes.

[0012] As a preferred embodiment of the present invention, of the two connected cylinder sections, the cylinder section located at the top is the upper cylinder section, and the cylinder section located at the bottom is the lower cylinder section;

[0013] The connection structure comprises: a locking portion arranged at the lower end of the upper cylinder segment and a locking groove arranged at the upper end of the lower cylinder segment;

[0014] A plurality of locking parts are evenly spaced along the circumferential direction on the outer circumferential surface of the lower end of the upper cylinder segment; the locking parts are pin-connected to the upper cylinder segment and can rotate outward and downward relative to the cylinder body around the connection between the locking parts and the upper cylinder segment;

[0015] A locking groove matching with each locking portion is arranged on the outer circumferential surface of the upper end of the lower cylinder section; the locking portion can enter the corresponding locking groove to achieve position locking.

[0016] As a preferred embodiment of the present invention: a rotating ring which can rotate around the axis of the cylinder segment is coaxially arranged on the outer circumference of the lower end of the upper cylinder segment; and the locking portion is pinned to the rotating ring.

[0017] As a preferred embodiment of the present invention: the locking portion is a bolt;

[0018] One end of the bolt is threaded, and the other end is pin-connected to the upper cylinder section;

[0019] After the bolt enters the corresponding locking groove, the threaded portion thereof extends out of the locking groove to cooperate with the nut to achieve position locking.

[0020] As a preferred embodiment of the present invention: the locking portion is a T-shaped lock;

[0021] The T-lock is inverted, and the upper end of its vertical portion is pin-connected to the upper cylinder section;

[0022] After the vertical portion of the T-lock enters the corresponding locking groove, the upper end surface of the horizontal portion contacts the bottom of the lower end surface of the locking groove; a threaded hole is provided at each end of the horizontal portion of the T-lock, and a threaded hole matching the threaded hole is provided at the corresponding position of the locking groove; position locking is achieved by screwing a fastener into the threaded hole.

[0023] In addition, the present invention provides a double-layer sleeve water storage back-pressure water inrush plugging system, comprising: an inner sleeve and an outer sleeve coaxially sleeved outside the inner sleeve;

[0024] The inner sleeve surrounds the water inflow port; a filter layer is arranged inside the inner sleeve;

[0025] The outer sleeve is the above-mentioned splicable water storage back pressure emergency sleeve, that is, the outer sleeve is formed by coaxially splicing more than one cylinder segment;

[0026] The drainage outlet of the inner sleeve is connected to the drainage outlet of the bottom cylinder section of the outer sleeve through a drainage pipe.

[0027] As a preferred embodiment of the present invention, a support ring is provided on the outer circumference of the lower end of the bottom cylinder section of the outer sleeve, and the support ring is connected to the bottom cylinder section of the outer sleeve via a plurality of support ribs distributed along the circumferential direction.

[0028] In addition, the present invention provides a construction method of a double-layer sleeve water storage back pressure water gushing plugging system, wherein the double-layer sleeve water storage back pressure water gushing plugging system is the above-mentioned water gushing plugging system;

[0029] S1: First, an inner sleeve is arranged outside the water inlet, and a filter layer is arranged inside the inner sleeve;

[0030] S2: Laying a cushion layer within a set range outside the inner sleeve to support the outer sleeve;

[0031] S3: Coaxially sleeve the outer sleeve outside the inner sleeve:

[0032] S301: firstly, placing the outer bottom cylinder section on the cushion layer to cover the inner sleeve; connecting the drainage port of the inner sleeve and the drainage port of the outer bottom cylinder section through a drainage pipe;

[0033] S302: Arranging a concrete layer on the outer periphery of the outer bottom cylinder segment and above the cushion layer to fix the outer bottom cylinder segment;

[0034] S303: Splicing of upper cylinder segments: Splicing a plurality of cylinder segments in sequence above the outer bottom cylinder segment

[0035] Beneficial effects:

[0036] (1) The splicable water storage counterpressure emergency sleeve of the present invention includes more than one coaxially spliced ​​cylinder section, which can increase the sleeve height according to the use requirements, solving the problem that the traditional emergency sleeve cannot be spliced ​​and cannot be increased in height; using the emergency sleeve for water storage counterpressure can avoid using the entire foundation pit for water storage counterpressure, reducing the impact on the construction period. And when a truncated cone-shaped emergency sleeve is used, a small amount of water can be used to solve the water storage counterpressure problem of high-pressure water gushing; saving water resources and shortening the emergency construction period.

[0037] (2) The connection structure in the splicable water storage back pressure emergency sleeve of the present invention can realize the rapid splicing of the emergency sleeve and quickly increase the height of the emergency sleeve.

[0038] (3) In the splicable water storage back pressure emergency sleeve of the present invention, a rotating ring that can rotate around the axis of the cylinder segment is coaxially arranged on the outer circumference of the lower end of the upper cylinder segment; the locking part is pin-connected with the rotating ring; therefore, when splicing, there is no need to rotate the cylinder body, and it is only necessary to rotate the rotating ring after the two cylinder segments are docked so that the locking part on the rotating ring is aligned one by one with the locking groove on the upper end of the lower cylinder segment, which can further improve the splicing efficiency.

[0039] (4) The double-layer sleeve water storage back pressure water gushing plugging system of the present invention first encircles the gushing outlet with the inner sleeve, and uses a water pump to pump water from the outside of the foundation pit to control the gushing water from spreading to the entire foundation pit. If the gushing water volume is too large and the inner steel sleeve cannot handle it, the outer sleeve is quickly set, and after it reaches a certain height, the water pump is stopped, and the gushing water level rises inside the outer sleeve. After it reaches a certain height, water storage back pressure can be achieved. In this way, the gushing outlet is first quickly located through the inner sleeve, and the gushing water is controlled in a short time. Then, the outer sleeve is used to complete the water storage back pressure, and rapid rescue can be achieved.

[0040] (5) When the head of underground pressure water is high, the range of water inflow is large, and the bearing capacity of the soil at the bottom of the foundation pit is low, the outer sleeve is spliced ​​upward at a high height and has a large self-weight. Due to the bearing capacity of the bottom of the foundation pit, it may settle significantly and there is a risk of uneven settlement, which may cause the outer sleeve to tilt. Based on this, a cushion layer is set to support the outer sleeve, and a concrete layer is set to fix the outer sleeve. A support ring is welded on the outer circumference of the bottom of the outer bottom cylinder segment. A triangular steel plate is used to weld and reinforce the support ring and the cylinder body of the outer bottom cylinder segment. The support ring can increase the contact area between the outer bottom cylinder segment and the cushion layer, reduce the pressure, and increase the bearing capacity of the bottom; thus, when water inflow occurs at the bottom of the foundation pit with low bearing capacity, it can ensure that the high-height water storage counter-pressure emergency steel sleeve will not deform or tip over during the water storage process, providing structural stability.

[0041] (6) The construction method of the present invention can quickly store water and counter-pressure the water gushing out of the foundation pit, and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the use of a steel sleeve in the prior art;

[0043] Figure 2 It is a schematic diagram of an equal diameter sleeve formed by splicing two upper and lower cylinder sections of equal diameter;

[0044] Figure 3 It is a schematic diagram of a truncated cone-shaped sleeve;

[0045] Figure 4 It is a schematic diagram of the structure of the flange on the upper end face of a single cylinder segment;

[0046] Figure 5 It is a schematic diagram of the structure of the flange on the lower end face of a single cylinder segment;

[0047] Figure 6 This is an enlarged view of the connection part when two cylinder sections are spliced ​​together;

[0048] Figure 7 It is a cross-sectional view of the cylinder section in Example 2;

[0049] Figure 8 It is a schematic diagram of the composition of the connection structure in Example 2;

[0050] Fig. 9 It is a schematic diagram of the components of the connection structure located at the bottom of the upper cylinder section in Example 2;

[0051] Fig.10 It is a schematic diagram of the cooperation between the rotating ring and the bolt in the connection structure in Example 2;

[0052] Fig.11 It is a schematic diagram of the arrangement of the locking grooves of the connection structure located at the top of the lower cylinder section in Example 2;

[0053] Fig.12 This is a schematic diagram of a T-lock connection structure in Example 3;

[0054] Fig.13 This is a schematic diagram of another T-lock connection structure in Example 3;

[0055] Fig.14 This is a schematic diagram of water storage back pressure;

[0056] Fig.15 A schematic diagram of the inner sleeve encircling the water outlet;

[0057] Fig.16 Schematic diagram of laying a concrete layer around the inner sleeve;

[0058] Fig.17 A schematic diagram of placing the bottom section of the outer sleeve on the concrete layer;

[0059] Fig.18 The top view (a) and side view (b) of the lowermost section of the outer steel sleeve;

[0060] Fig.19 This is a schematic diagram after laying the second concrete layer;

[0061] Fig. 20 It is a schematic diagram of a plurality of cylinder segments being sequentially spliced ​​above the outer bottom cylinder segment;

[0062] Fig.21 Schematic diagram of the outer sleeve support reinforcement.

[0063] Among them: 1- cylinder body; 2- ladder; 3- drain outlet; 4- connection structure; 5- flange; 6- sealing rubber ring; 7- upper cylinder section; 8- lower cylinder section; 9- rotating ring; 10- bolt; 11- locking groove; 12- nut; 13- T-lock; 14- fixing screw; 15- fastener; 16- inner sleeve; 17- filter layer; 18- first concrete layer; 19- outer bottom cylinder section; 20- support ring; 21- support plate; 22- drain pipe; 23- second concrete layer; 24- support rod. DETAILED DESCRIPTION

[0064] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0065] Embodiment 1:

[0066] This embodiment provides a splicable water storage and counter-pressure emergency sleeve, which can realize the rapid splicing of emergency sleeves, quickly increase the height of the emergency sleeve, and provide its water storage and counter-pressure function.

[0067] like Figure 2-Figure 6 As shown, the emergency sleeve is composed of several cylinder segments coaxially spliced ​​together; a single cylinder segment includes: a cylinder body 1, a ladder 2, a drain outlet 3 and a connecting structure 4 for achieving axial splicing; wherein the cylinder segment is usually a steel sleeve, and other lightweight materials such as high-strength plastics, glass fiber, etc. can also be used.

[0068] In order to realize the splicing of emergency sleeves of different structural forms, the cylinder segments are divided into two specifications: ordinary upper and lower equal-diameter cylinder segments and truncated cone-shaped cylinder segments; there is more than one truncated cone-shaped cylinder segment, and the diameters decrease successively, so that they can be axially spliced ​​together in sequence to form a truncated cone-shaped emergency sleeve with a larger height (that is, the large end diameter of the largest truncated cone-shaped cylinder segment is the same as the diameter of the equal-diameter cylinder segment, and is used for splicing with the equal-diameter cylinder segment; the large end diameter of the second largest truncated cone-shaped cylinder segment is the same as the small end diameter of the largest truncated cone-shaped cylinder segment, and is used for splicing with the largest truncated cone-shaped cylinder segment, and so on).

[0069] When two or more cylinder sections of equal diameter are coaxially spliced, a Figure 2When the truncated cone type cylinder section (the largest truncated cone type cylinder section) is spliced ​​above the truncated cone type cylinder section, the following is formed: Figure 3 The variable diameter frustum cone type sleeve shown in (a) can also be spliced ​​with multiple frustum cone type cylinder sections according to the use requirements to form a Figure 3 The variable diameter frustum-type sleeve shown in (b) in the middle. The spliced ​​sleeve can be used for water storage and back pressure. Since the head height is fixed, the spliced ​​sleeve only needs to reach the head height of the pressurized water. The use of variable diameter frustum-type sleeves can shorten the water injection time and save a lot of water resources (that is, the amount of water injected inside the cylinder can be reduced during water storage and back pressure can be quickly reversed); at the same time, the frustum-type structure with a variable cross-section is used, and the center line is not easy to deviate. Compared with the equal diameter structure, it has higher stability and safety.

[0070] A ladder 2 is arranged along the height direction of the outer circumference of the cylinder body 1; as an example, three sets of ladders are evenly spaced along the circumference of the outer circumference of the cylinder body 1 for workers to climb the ladders to splice and fix the emergency sleeve. In addition, a hoisting component (such as a hoisting ring) for hoisting is also arranged on the cylinder body 1.

[0071] The drain port 3 is arranged at the upper part of the barrel 1 (a drain switch is arranged at the drain port 3); the drain port 3 has two functions: first, if the head of the pressurized water is large and the water inflow is too much, an external water pump can be connected to pump water; second, it is used to drain water when splicing the sleeve, so that the liquid level in the sleeve is lower than the connection structure 4, which does not affect the sleeve connection. According to the actual use situation, multiple drain ports 3 can be arranged along the circumference.

[0072] The connection structure 4 is used for sealing connection between the two cylinder sections, maintaining a stable connection between the two cylinder sections, and has a strong sealing effect to ensure that there is no water leakage between the two cylinder sections after connection.

[0073] As an example, the connection structure 4 includes: a flange 5 and a sealing rubber ring 6; a flange 5 is welded on each of the upper and lower sides (i.e., the axial ends) of the barrel 1, and when splicing, a sealing rubber ring 6 is installed between the two flanges 5. The two flanges 5 are fixedly connected by flange grips or bolts.

[0074] In order to increase the splicing efficiency, the flange 5 is improved and designed to reduce the splicing hole alignment time when it is fixed by bolts. Specifically: the bolt holes on the flange 5 at the upper end of the barrel 1 are changed into arc holes, such as Figure 4 As shown, at this time, the end surface of the flange 5 at the upper end of the barrel 1 has a number of arc holes evenly distributed along the circumferential direction; while the lower end of the barrel 1 uses a normal flange, that is, Figure 5 As shown, the bolt holes on the flange end face are normal round holes, which can greatly reduce the time for splicing and aligning holes.

[0075] When the sleeve is used for water storage and counter pressure, a cylinder section of equal diameter is inserted into the water inlet, and then truncated cone-shaped cylinder sections with gradually decreasing diameters are spliced ​​upwards to form a truncated cone-shaped emergency sleeve; water is then injected into the cylinder to achieve the purpose of water storage and counter pressure.

[0076] Embodiment 2:

[0077] Based on the above embodiment 1, another structural form of the connection structure 4 is provided.

[0078] In this embodiment, flanges 5 are not welded to the axial ends of the cylinder body 1 . First, for the convenience of description, the upper cylinder segment of the two connected cylinder segments is called the upper cylinder segment 7 , and the lower cylinder segment is called the lower cylinder segment 8 .

[0079] like Figure 7-Figure 11 As shown, the connection structure 4 in this embodiment includes: a bolt 10 arranged at the lower end of the upper barrel segment 7 and a locking groove 11 arranged at the upper end of the lower barrel segment 8; a plurality of bolts 10 are evenly spaced and distributed along the circumferential direction on the outer circumferential surface of the lower end of the upper barrel segment 7; one end of the bolt 10 is processed with a thread, and the other end is pinned to the upper barrel segment 7; the bolt 10 can rotate outward and downward relative to the barrel body 1 around the connection between it and the upper barrel segment 7; when the barrel segment is not in use, the bolt 10 rotates inward and upward to a vertical state and abuts on the outer surface of the barrel body 1. A locking groove 11 is provided on the outer circumferential surface of the upper end of the lower barrel segment 8 corresponding to each bolt 10; the width of the locking groove 11 is the same as the diameter of the bolt 10, so that the bolt 10 can be placed in the locking groove 11; and after the bolt 10 is placed in the locking groove 11, its threaded portion extends out of the locking groove 11 to cooperate with the nut 12 to achieve the position locking of the bolt 10.

[0080] As an example, a limiting groove for the nut 12 is provided at the lower end of the locking groove 11 .

[0081] As an example, in order to ensure convenient splicing, a rotating ring 9 that can rotate around the axis of the cylinder segment is coaxially arranged on the outer circumference of the lower end of the upper cylinder segment 7 (such as the rotating ring 9 is supported on the outer circumference of the lower end of the upper cylinder segment 7 through a bearing); the bolt 10 is pin-connected with the rotating ring 9 (that is, a support ear is provided on the rotating ring 9 corresponding to each bolt 10, and the support ear at the end of the bolt 10 is pin-connected through a pin shaft, and the axis of the pin shaft is along the tangent direction of the corresponding position of the cylinder body 1), and the bolt 10 can rotate outward and downward around the pin connection with the rotating ring 9. Therefore, when splicing, there is no need to rotate the barrel 1 to make the bolt 10 and the locking groove 11 correspond in position. After the two barrel sections are connected, the rotating ring 9 at the lower end of the upper barrel section 7 is rotated to align the bolt 10 on the rotating ring 9 with the locking groove 11 at the upper end of the lower barrel section 8 one by one. Then, the bolt 10 is rotated downward to make it enter the locking groove 11, and then the nut 12 is tightened on the threaded part of the bolt 10 to fix it (at this time, the upper end face of the nut 12 is in conflict with the lower end face of the steel forming the locking groove 11).

[0082] As an example, the locking groove 11 is formed as follows: each locking groove 11 is formed by two pieces of steel that are relatively arranged and welded to the outer circumferential surface of the barrel 1 of the lower barrel section 8, the distance between the two pieces of steel is the same as the diameter of the bolt 10, and the groove between the two pieces of steel is the locking groove 11.

[0083] The above-mentioned connection structure 4 is only used for locking between the two cylinder sections. Other sealing measures are used between the two cylinder sections, such as waterproof tape inside and sealing strips between the two cylinders. Figure 7 As shown, during splicing, the upper end of the lower cylinder section 8 is inserted into the lower end of the upper cylinder section 7, and then a sealing rubber ring 6 is arranged at the joint.

[0084] Embodiment 3:

[0085] Based on the above embodiment 1, another structural form of the connection structure 4 is provided.

[0086] In this embodiment, flanges 5 are not welded to the axial ends of the barrel 1 . First, for the convenience of description, the upper sleeve of the two connected barrel sections is the upper barrel section 7 , and the lower sleeve is the lower barrel section 8 .

[0087] The connection structure 4 in this embodiment is a T-shaped lock connection structure; Fig.12 As shown, the T-lock connection structure includes: a T-lock 13 arranged at the lower end of the upper barrel segment 7 and a locking groove 11 arranged at the upper end of the lower barrel segment 8; a plurality of T-locks 13 are evenly spaced along the circumferential direction on the outer circumferential surface of the lower end of the upper barrel segment 7; the T-lock 13 is inverted, and the upper end of its vertical portion is pin-connected with the upper barrel segment 7; the T-lock 13 can be rotated outwardly and downwardly relative to the barrel body 1 around the connection between it and the upper barrel segment 7; when the barrel segment is not in use, the T-lock 13 is rotated inwardly and upwardly to a vertical state and attached to the outer surface of the barrel body 1. A locking groove 11 matching with each T-lock 13 is provided on the outer circumferential surface of the upper end of the lower cylinder section 8; the width of the locking groove 11 is the same as the width of the vertical portion of the T-lock 13, ensuring that the vertical portion of the T-lock 13 can be placed in the locking groove 11; and after the vertical portion of the T-lock 13 is placed in the locking groove 11, the upper end surface of the horizontal portion thereof abuts against the bottom of the lower end surface of the locking groove 11; a threaded hole is provided at each end of the horizontal portion of the T-lock 13, and a fixing screw 14 is screwed into the threaded hole to support the lower end surface of the locking groove 11 for fixing.

[0088] That is, the T-lock connection structure replaces the bolt 10 in the above-mentioned embodiment 2 with a T-lock 13 .

[0089] As an improvement, Fig.13As shown, a threaded hole is provided at each end of the horizontal portion of the T-lock 13, and a threaded hole matching the locking groove 11 is provided at the corresponding position of the locking groove 11 (i.e., the bottom surfaces of the two steel plates used to form the locking groove 11); thus, the T-lock 13 is rotated downward so that its vertical portion enters the locking groove 11, and the position locking can be achieved by tightening the T-lock 13 and the locking groove 11 through the fastener 15.

[0090] Embodiment 4:

[0091] Based on the splicable water storage back pressure emergency sleeves of Example 1 to Example 3, this embodiment provides a double-layer sleeve water storage back pressure water surge plugging system and a construction method thereof.

[0092] like Figure 15-Figure 21 As shown, the double-layer sleeve water storage back pressure water gushing plugging system comprises: an inner sleeve 16 and an outer sleeve coaxially sleeved outside the inner sleeve 16; wherein the inner sleeve 16 encircles the gushing outlet and is used to control the gushing in a short time; the inner sleeve 16 can be an ordinary sleeve, or it can be the splicable water storage back pressure emergency sleeve in the above-mentioned embodiment 1; the outer sleeve is a truncated cone sleeve spliced ​​by more than one cylinder segment. A reverse filter layer 17 is arranged inside the inner sleeve 16. The drainage port of the inner sleeve 16 is connected to the drainage port of the bottom cylinder segment of the outer sleeve (i.e., the outer bottom cylinder segment 19) through a drainage pipe 22.

[0093] The outer sleeve is supported on a cushion layer (such as a concrete cushion layer) arranged on the periphery of the inner sleeve 16, and a concrete layer is laid on the outer layer of the outer sleeve to support and fix it.

[0094] As an example, a support ring 20 is provided on the outer circumference of the bottom of the outer bottom cylinder segment 19 , and the support ring 20 and the cylinder body of the outer bottom cylinder segment 19 are welded and reinforced by a plurality of triangular steel plates distributed along the circumferential direction.

[0095] As an example, to increase the stability of the outer sleeve, the cylinder segments above the outer bottom cylinder segment 19 are supported by support rods 24 (such as steel pipes) to the surrounding of the foundation pit, the ground or other stable structures (such as concrete supports).

[0096] The construction method of the double-layer sleeve water storage back pressure water surge plugging system is:

[0097] S1: First, an inner sleeve 16 is disposed outside the water inlet to quickly locate the water inlet and control the water inflow in a short time. Fig.15 As shown; specifically: an inner sleeve 16 is inserted into the stratum at the bottom of the foundation pit to encircle the water outlet; water is pumped to control the water level. If the amount of water gushing is too large and the water level continues to rise, the height of the inner sleeve 16 can be increased (that is, the inner sleeve 16 can also adopt the splicable water storage back pressure emergency sleeve in Example 1); a filter layer 17 is set inside the inner sleeve 16.

[0098] S2: After the inner sleeve 16 is placed, a certain area is demarcated on its periphery and a first concrete layer 18 (usually a quick-hardening concrete layer) is laid as a cushion layer. Fig.16 That is, using fast-hardening concrete, a first concrete layer 18 is laid within a certain range outside the inner sleeve 16 to support the outer sleeve. In addition to using a concrete cushion to support the outer sleeve, a pad can also be used as long as the outer sleeve is kept level.

[0099] S3: Then, an outer sleeve is coaxially sleeved outside the inner sleeve 16. The outer sleeve is a cylindrical or truncated cone sleeve formed by coaxially splicing a number of cylinder segments in Embodiment 1; preferably, it is a truncated cone sleeve.

[0100] The specific steps of setting the outer sleeve are:

[0101] S301: First, place a cylinder section (outer bottom cylinder section 19) of equal diameter on the first concrete layer 18 and cover the inner sleeve 16. Fig.17 shown.

[0102] Specifically: when the first concrete layer 18 is capable of bearing the outer bottom cylinder segment 19 , the outer bottom cylinder segment 19 is placed on the first concrete layer 18 , and the drainage outlet of the inner sleeve 16 and the drainage outlet of the outer bottom cylinder segment 19 are connected through the drainage pipe 22 .

[0103] A support ring 20 is welded on the outer circumference of the bottom of the outer bottom cylinder segment 19. A triangular steel plate can be used to weld and reinforce the support ring 20 and the cylinder body of the outer bottom cylinder segment 19, that is, a number of triangular support plates 21 are evenly spaced along the circumference between the support ring 20 and the cylinder body of the outer bottom cylinder segment 19 as reinforcing ribs; the support ring 20 can increase the contact area between the outer bottom cylinder segment 19 and the first concrete layer 18, reduce the pressure, and increase the bearing capacity of the bottom, so that more cylinder segments can be spliced. The support ring 20 is usually a steel ring, and can also be made of other materials such as wood, plastic, etc.

[0104] S302: On the periphery of the outer bottom cylinder section 19, the quick-hardening concrete is continuously poured above the first concrete layer 18 to form a second concrete layer 23 to fix the outer bottom cylinder section 19. Fig.19 As shown. In this way, the outer bottom cylinder section 19 can have a high bearing capacity in a short time, and the remaining cylinder sections (including variable diameter and constant diameter) can be spliced ​​upward. In addition, the second concrete layer 23 can also provide support for the outer bottom cylinder section 19 to ensure its stability.

[0105] S303: Upper cylinder section splicing: Fig. 20As shown, a plurality of cylinder segments (including truncated cone-shaped or equal-diameter cylinder segments) are sequentially spliced ​​above the outer bottom cylinder segment 19, thereby forming a double-layer sleeve water storage back-pressure water inrush plugging system.

[0106] On this basis, in order to increase the stability of the outer sleeve, support rods 24 (such as steel pipes) can be connected from the outside of each cylinder segment above the outer bottom cylinder segment 19 to support the surrounding of the foundation pit, the ground or other stable structures (such as concrete support), such as Fig.21 As shown, each cylinder segment is supported on the concrete support around the foundation pit through relatively arranged transverse steel pipes.

[0107] In addition to being used for foundation pit water inrush, the water storage back-pressure water-gushing plugging system can also be used in small-scale rescue operations for reservoir and dam leaks.

[0108] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. The water storage back pressure emergency sleeve can be spliced, characterized in that: It includes more than one coaxially spliced ​​barrel section; The cylinder section is divided into a diameter cylinder section and a truncated cone cylinder section, which can be spliced ​​into an equal-diameter emergency sleeve or a truncated cone emergency sleeve; The cylinder section comprises: a cylinder body, a ladder, a drain port and a connection structure for realizing axial splicing; the outer circumference of the cylinder body is provided with a ladder along the height direction; the upper part of the cylinder body is provided with a drain port with a drain switch; The connection structure is used for sealing connection between two cylinder sections.

2. The connectable water storage back pressure emergency sleeve according to claim 1, characterized in that: The connection structure comprises: a flange and a sealing rubber ring; a flange is welded to each of the two axial ends of the cylinder body; during splicing, a sealing rubber ring is installed between the two butted flanges.

3. The connectable water storage back pressure emergency sleeve according to claim 2, characterized in that: The two flanges are fixedly connected by bolts; a plurality of arc-shaped holes are evenly distributed along the circumferential direction on the end surface of the flange at the upper end of the barrel as bolt connection holes.

4. The connectable water storage back pressure emergency sleeve according to claim 1, characterized in that: In two connected tube sections, the tube section located on the upper side is called the upper tube section, and the tube section located on the lower side is called the lower tube section; The connection structure comprises: a locking portion arranged at the lower end of the upper cylinder segment and a locking groove arranged at the upper end of the lower cylinder segment; A plurality of locking parts are evenly spaced along the circumferential direction on the outer circumferential surface of the lower end of the upper cylinder segment; the locking parts are pin-connected to the upper cylinder segment and can rotate outward and downward relative to the cylinder body around the connection between the locking parts and the upper cylinder segment; A locking groove matching with each locking portion is arranged on the outer circumferential surface of the upper end of the lower cylinder section; the locking portion can enter the corresponding locking groove to achieve position locking.

5. The connectable water storage back pressure emergency sleeve according to claim 4, characterized in that: A rotating ring which can rotate around the axis of the cylinder segment is coaxially arranged on the outer circumference of the lower end of the upper cylinder segment; and the locking portion is pin-connected to the rotating ring.

6. The connectable water storage back pressure emergency sleeve according to claim 4 or 5, characterized in that: The locking portion is a bolt; One end of the bolt is threaded, and the other end is pin-connected to the upper cylinder section; After the bolt enters the corresponding locking groove, the threaded portion thereof extends out of the locking groove to cooperate with the nut to achieve position locking.

7. The connectable water storage back pressure emergency sleeve according to claim 4 or 5, characterized in that: The locking portion is a T-lock; The T-lock is inverted, and the upper end of its vertical portion is pin-connected to the upper cylinder section; After the vertical portion of the T-lock enters the corresponding locking groove, the upper end surface of the horizontal portion contacts the bottom of the lower end surface of the locking groove; a threaded hole is provided at each end of the horizontal portion of the T-lock, and a threaded hole matching the threaded hole is provided at the corresponding position of the locking groove; position locking is achieved by screwing a fastener into the threaded hole.

8. Double-layer sleeve water storage back pressure water surge plugging system, characterized by: include: An inner sleeve and an outer sleeve coaxially sleeved outside the inner sleeve; The inner sleeve surrounds the water inflow port; a filter layer is arranged inside the inner sleeve; The outer sleeve is a splicable water storage back pressure emergency sleeve as described in any one of claims 1 to 7, that is, the outer sleeve is formed by coaxially splicing more than one sleeve segment; The drainage outlet of the inner sleeve is connected to the drainage outlet of the bottom cylinder section of the outer sleeve through a drainage pipe.

9. The double-layer sleeve water storage back-pressure water surge plugging system according to claim 8, characterized in that: A support ring is arranged on the outer circumference of the lower end of the bottom cylinder section of the outer sleeve, and the support ring is connected to the bottom cylinder section of the outer sleeve via a plurality of support ribs distributed along the circumferential direction.

10. Double-layer sleeve water storage back pressure water surge plugging system construction method, characterized in that: The double-layer sleeve water storage back-pressure water gushing plugging system is the water gushing plugging system according to claim 8 or 9; S1: First, an inner sleeve is arranged outside the water inlet, and a filter layer is arranged inside the inner sleeve; S2: Laying a cushion layer within a set range outside the inner sleeve to support the outer sleeve; S3: Coaxially sleeve the outer sleeve outside the inner sleeve: S301: firstly, placing the outer bottom cylinder section on the cushion layer to cover the inner sleeve; connecting the drainage port of the inner sleeve and the drainage port of the outer bottom cylinder section through a drainage pipe; S302: Arranging a concrete layer on the outer periphery of the outer bottom cylinder segment and above the cushion layer to fix the outer bottom cylinder segment; S303: Splicing the upper cylinder segments: splicing a plurality of cylinder segments in sequence above the outer bottom cylinder segment.

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