Grouting method for reserved water stop groove of force transfer plate of immersed tube bottom plate

Abstract

The invention discloses a grouting method for a reserved water stop groove of a force transfer plate of an immersed tube bottom plate, and belongs to the technical field of immersed tube tunnel construction. The method comprises the steps that before dry dock irrigation, a plurality of Q-type water stop belts are arranged on a force transmission plate in the transverse direction of a pipe joint, the Q-type water stop belts are sequentially arranged in parallel in the axial direction of the pipe joint, and a reserved water stop groove is formed between every two adjacent Q-type water stop belts; each reserved waterstop groove is transversely divided into at least one grouting subarea along the pipe joint, a grouting pipe is correspondingly arranged in each grouting subarea, and an embedded section of the grouting pipe is fixed on the force transmission plate and is parallel to the Q-shaped waterstop belt; after the final joint end pipe joint is installed, a gas injection test is conducted on the grouting pipe, and permeability is ensured; and grouting is conducted in sequence according to the preset grouting sequence of the reserved water stop grooves, and grouting is completed in sequence according to the preset grouting subarea grouting sequence in each reserved water stop groove. According to the grouting method for the reserved water stop groove of the force transfer plate of the immersed tube bottom plate, the waterproof reliability can be improved, and the long-term waterproof durability and the construction quality are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of immersed tube tunnel construction, and particularly relates to a method for grouting a reserved water stop groove of an immersed tube bottom plate transfer plate. BACKGROUND

[0002] In immersed tube tunnel construction, the joint water stop of the immersed tube segment and the land transfer plate is a key link to ensure the waterproof quality of the project. At present, the industry generally uses the method of installing Q-type water stop belts on the transfer plate to achieve water stop. However, the traditional construction process has obvious defects: on the one hand, the installation precision of the water stop belt is insufficient, and the construction operation is not standardized, which can easily lead to the failure of its waterproof function. Moreover, once leakage occurs, the traditional repair method requires chiseling the structure or drilling and grouting, which is complex, high in cost, and ineffective. On the other hand, in complex engineering environments (such as deformation joints, construction joints, or later silt backfill scenarios), the water stop belts are prone to blockage of the grouting channel due to the lack of effective space between them, which seriously affects the grouting reinforcement effect and cannot meet the long-term waterproof durability requirements. Therefore, there is an urgent need for a grouting method that can improve the waterproof reliability. SUMMARY

[0003] In view of the deficiencies in the related art, the purpose of the present application is to provide a method for grouting a reserved water stop groove of an immersed tube bottom plate transfer plate to solve the problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A method for grouting a reserved water stop groove of an immersed tube bottom plate transfer plate, comprising the following steps: S1. Before dry dock water filling, a plurality of Q-type water stop belts are fixedly arranged on the transfer plate at the position of the segment bottom plate of the final joint end along the transverse direction of the segment, the plurality of Q-type water stop belts are arranged in parallel along the axial direction of the segment in sequence, and the adjacent Q-type water stop belts form a reserved water stop groove therebetween; S2. Each reserved water stop groove is divided into at least one grouting subzone along the transverse direction of the segment, and one grouting pipe is correspondingly arranged in each grouting subzone, the embedded section of the grouting pipe is fixed on the transfer plate, and the embedded section of the grouting pipe is parallel to the Q-type water stop belt; S3. After the installation of the segment at the final joint end is completed, air injection tests are respectively conducted on all the grouting pipes to detect the permeability of the grouting pipes; S4. Grouting is sequentially performed according to a preset grouting sequence of the reserved water stop groove, and in each reserved water stop groove, grouting is sequentially completed according to a preset grouting subzone grouting sequence.

[0005] In some embodiments, the reserved water stop groove includes a water stop groove away from the dry dock side and a water stop groove close to the dry dock side, the water stop groove close to the dry dock side is located at the bottom of the box-type steel beam structure of the final joint end segment, and the number of grouting subzones of the water stop groove close to the dry dock side is greater than that of the water stop groove away from the dry dock side.

[0006] In some embodiments, the preset grouting sequence of the preformed water stop trench is from the direction away from the dry dock side to the direction close to the dry dock side; and in each preformed water stop trench, the preset grouting sequence of the grouting sub-zones is from the same end of the preformed water stop trench as the starting end, and sequentially grouting along the direction from the starting end to the other end.

[0007] In some embodiments, in each preformed water stop trench, the grouting connection mode of the grouting sub-zones is that when the grouting pressure of the current grouting sub-zone reaches a preset pressure threshold, the grouting of the grouting sub-zone is stopped, and then the grouting of the next grouting sub-zone is started, until the grouting of all grouting sub-zones in the preformed water stop trench is completed, and the preset pressure threshold is not less than the upper limit value of the grouting working pressure.

[0008] In some embodiments, in each preformed water stop trench, the lengths of the grouting pipes corresponding to the grouting sub-zones are different, and the length of the grouting pipe is adapted to the distance between the corresponding grouting sub-zone and the grouting end, so that the grouting material uniformly and densely fills the corresponding grouting sub-zone.

[0009] In some embodiments, the air injection test specifically includes: S31, closing the sealing structure at the end of the grouting pipe to form an independent sealed channel inside the grouting pipe; S32, introducing compressed air into the grouting pipe through the air injection equipment, and setting the test pressure to be not less than 1.2 times the subsequent grouting working pressure; S33, stopping air supply after pressurizing to the set test pressure, and maintaining pressure for not less than 3 minutes, during which the pressure change is monitored in real time; S34, if the pressure drop value is not more than the preset allowable range during the pressure maintaining period, it is judged that the permeability of the grouting pipe is qualified.

[0010] In some embodiments, the grouting pipe is a two-section structure, including a seamless steel pipe section fixed to the force transmission plate and located in the preformed water stop trench area, and a high-pressure rubber pipe section connected to the ground and used for connecting the grouting machine, and the seamless steel pipe section and the high-pressure rubber pipe section are fixedly connected through a sealing joint.

[0011] In some embodiments, the end of the seamless steel pipe section of the grouting pipe away from the high-pressure rubber pipe section is provided with a check valve, the flow direction of the check valve is consistent with the grouting direction, and the check valve is used to block the reverse flow of the grouting material, silt and external impurities in the preformed water stop trench into the grouting pipe.

[0012] In some embodiments, the pipe diameter of the seamless steel pipe section is 30 mm, and the wall thickness is 2 mm, the pipe diameter of the high-pressure rubber pipe section is 50 mm, and the rated pressure of the high-pressure rubber pipe section is not less than 1.5 times the grouting working pressure.

[0013] In some embodiments, the high-pressure rubber pipe section is connected to the ground and extends to the top of the diaphragm wall.

[0014] Compared with the prior art, the present application has the following advantages: 1. The method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate provided by the present application forms the reserved water stop groove by arranging a Q-shaped water stop belt, and differentiates the grouting partitions as needed. More grouting partitions are divided for the reserved water stop groove at the bottom of the structure close to the dry dock side. In combination with the precise adaptation of the length of the grouting pipe and the distance of the grouting partitions, uniform and dense filling of grouting can be achieved, the waterproof reliability is significantly improved, and the long-term waterproof durability is strengthened.

[0015] 2. The method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate provided by the present application standardizes the grouting sequence of the reserved water stop groove, the grouting sequence of the grouting partitions, and the pressure connection logic of switching to the next grouting partition when the grouting pressure of the current grouting partition reaches the preset pressure threshold. This not only avoids cross interference of grouting and improves the efficiency of construction flow, but also ensures that each grouting partition is full and has no gap, taking into account the construction efficiency and waterproof quality, and is suitable for high-precision waterproof construction scenes at the immersed tube bottom plate force transfer plate.

[0016] 3. The method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate provided by the present application cooperates the check valve anti-blocking design of the grouting pipe with the two-section structure: the check valve can directly block silt backfilling, debris blocking and grouting material backflow, and the seamless steel pipe section in the two-section structure is stably fixed in the water stop groove area of the force transfer plate, and the high-pressure rubber pipe section is exposed and can be conveniently connected to the grouting machine. This not only avoids damage to the grouting channel during construction, but also strengthens the anti-blocking protection, double-protects the long-term smoothness of the grouting channel, and ensures the smooth progress of subsequent grouting. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings: Figure 1 Method flowchart of one embodiment of the method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate of the present application; Figure 2 Q-shaped water stop belt longitudinal section arrangement drawing of one embodiment of the method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate of the present application; Figure 3 Q-shaped water stop belt longitudinal section arrangement drawing of one embodiment of the method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate of the present application; Figure 2 Figure 4 Q-shaped water stop belt longitudinal section arrangement drawing of one embodiment of the method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate of the present application; Figure 5 Grouting pipe two-section connection structure schematic diagram of one embodiment of the method for grouting the reserved water stop groove of the immersed tube bottom plate force transfer plate of the present application; ​Figure 6 The first reserved water stop groove grouting schematic diagram of one embodiment of the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate of the application; Figure 7 The first reserved water stop groove grouting schematic diagram of one embodiment of the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate of the application; Figure 6 The first reserved water stop groove grouting schematic diagram of one embodiment of the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate of the application; Figure 8 The first reserved water stop groove grouting schematic diagram of one embodiment of the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate of the application; Figure 9 The first reserved water stop groove grouting schematic diagram of one embodiment of the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate of the application; Figure 10 The first reserved water stop groove grouting schematic diagram of one embodiment of the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate of the application.

[0018] In the figure: 1, Q type water stop belt; 11, first Q type water stop belt; 12, second Q type water stop belt; 13, third Q type water stop belt; 14, fourth Q type water stop belt; 2, reserved water stop groove; 21, first reserved water stop groove; 22, second reserved water stop groove; 23, third reserved water stop groove; 24, fourth reserved water stop groove; 3211, first grouting subarea; 3212, second grouting subarea; 3213, third grouting subarea; 3221, fourth grouting subarea; 3222, fifth grouting subarea; 3223, sixth grouting subarea; 3231, seventh grouting subarea; 3232, eighth grouting subarea; 3233, ninth grouting subarea; 3234, tenth grouting subarea; 3241, eleventh grouting subarea; 3242, twelfth grouting subarea; 3243, thirteenth grouting subarea; 3244, fourteenth grouting subarea; 4, grouting pipe; 41, seamless steel pipe section; 42, high-pressure rubber pipe section; 4211, first grouting pipe; 4212, second grouting pipe; 4213, third grouting pipe; 4221, fourth grouting pipe; 4222, fifth grouting pipe; 4223, sixth grouting pipe; 4231, seventh grouting pipe; 4232, eighth grouting pipe; 4233, ninth grouting pipe; 4234, tenth grouting pipe; 4241, eleventh grouting pipe; 4242, twelfth grouting pipe; 4243, thirteenth grouting pipe; 4244, fourteenth grouting pipe; 5, final joint end pipe section; 6, force transfer plate; 7, diaphragm wall; 8, dry dock; 9, box girder structure. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Embodiment 1: Referring to the accompanying drawings, Figures 1 to 10 An illustrative embodiment of the grouting method for the reserved water stop groove of the immersed tube bottom plate force transfer plate is shown in the drawings, which comprises the following steps: S1, before the dry dock 8 is filled with water, a plurality of Q-type water stop belts 1 are fixedly arranged on the force transfer plate 6 at the position of the bottom plate of the final joint end pipe section 5 along the transverse direction of the pipe section, and the plurality of Q-type water stop belts 1 are arranged in parallel along the axial direction of the pipe section, and the reserved water stop grooves 2 are formed between adjacent Q-type water stop belts 1; S2, each reserved water stop groove 2 is divided into at least one grouting subzone along the transverse direction of the pipe section, and one grouting pipe 4 is arranged in each grouting subzone, the embedded section of the grouting pipe 4 is fixed on the force transfer plate 6, and the embedded section of the grouting pipe 4 is parallel to the Q-type water stop belt 1; S3, after the final joint end pipe section 5 is installed, air injection tests are respectively performed on all the grouting pipes 4 to detect the permeability of the grouting pipes 4; S4, grouting in sequence according to the preset grouting sequence of the reserved water stop groove 2, and grouting in sequence according to the preset grouting partition grouting sequence in each reserved water stop groove 2.

[0023] In step S1, referring to the accompanying drawings Figure 2 and Figure 3 In this embodiment, before the dry dock 8 is filled with water, four Q-shaped water stop belts 1 are fixedly arranged on the force transmission plate 6 at the bottom plate position of the end pipe section 5 of the final joint, along the transverse direction of the pipe section, which are respectively a first Q-shaped water stop belt 11, a second Q-shaped water stop belt 12, a third Q-shaped water stop belt 13, and a fourth Q-shaped water stop belt 14. The adjacent Q-shaped water stop belts 1 form reserved water stop grooves 2, specifically, the first Q-shaped water stop belt 11 and the second Q-shaped water stop belt 12 form a first reserved water stop groove 21, the second Q-shaped water stop belt 12 and the third Q-shaped water stop belt 13 form a second reserved water stop groove 22, the third Q-shaped water stop belt 13 and the fourth Q-shaped water stop belt 14 form a third reserved water stop groove 23, and the fourth Q-shaped water stop belt 14 and the edge of the dry dock close to the water side form a fourth reserved water stop groove 24.

[0024] Through the design of arranging the Q-shaped water stop belts 1 along the transverse direction of the pipe section and arranging them in parallel along the axial direction, it can not only ensure that the gaps between the adjacent Q-shaped water stop belts 1 form uniform and continuous reserved water stop grooves 2 along the axial direction, realizing full coverage of the waterproof gap in the area of the force transmission plate 6 without blind area, but also can provide a good sealing basis for subsequent grouting filling by the elastic sealing characteristics of the Q-shaped water stop belts 1 themselves, reducing the risk of leakage of grouting materials, and at the same time, the fixation of the Q-shaped water stop belts 1 can be completed before the installation of the end pipe section 5 of the final joint, which can avoid installation errors caused by limited construction space in the later stage, and ensure the forming precision of the reserved water stop grooves 2.

[0025] The reserved water stop grooves 2 include water stop grooves away from the dry dock side and water stop grooves close to the dry dock side, and the water stop grooves close to the dry dock side are located at the bottom of the box-type steel beam structure 9 of the final joint end pipe section installation box, and the number of grouting partitions of the water stop grooves close to the dry dock side is greater than that of the water stop grooves away from the dry dock side.

[0026] In the embodiment, the first and second reserved water stop grooves 21 and 22 are far from the dry dock side water stop groove, and the third and fourth reserved water stop grooves 23 and 24 are close to the dry dock side water stop groove. The third and fourth reserved water stop grooves 23 and 24 are located at the bottom of the box-shaped steel beam structure 9 of the final joint end pipe section installation box. The first and second reserved water stop grooves 21 and 22 are respectively provided with three grouting sub-zones; the first reserved water stop groove 21 includes a first grouting sub-zone 3211, a second grouting sub-zone 3212, and a third grouting sub-zone 3213; and the second reserved water stop groove 22 includes a fourth grouting sub-zone 3221, a fifth grouting sub-zone 3222, and a sixth grouting sub-zone 3223. The third and fourth reserved water stop grooves 23 and 24 are respectively provided with four grouting sub-zones; the third reserved water stop groove 23 includes a seventh grouting sub-zone 3231, an eighth grouting sub-zone 3232, a ninth grouting sub-zone 3233, and a tenth grouting sub-zone 3234; and the fourth reserved water stop groove 24 includes an eleventh grouting sub-zone 3241, a twelfth grouting sub-zone 3242, a thirteenth grouting sub-zone 3243, and a fourteenth grouting sub-zone 3244.

[0027] By such differentiated partition setting adapting to the difference of actual waterproofing requirements: for the third and fourth reserved water stop grooves 23 and 24 close to the dry dock side and located at the bottom of the box-shaped steel beam structure 9 (key parts with higher waterproofing requirements), additional grouting sub-zones are added, which can make the grouting material more uniformly fill the water stop groove gap, avoid local hollowing and non-dense filling problems, and effectively strengthen the waterproofing reliability of the core area; while the first and second reserved water stop grooves 21 and 22 with relatively lower waterproofing requirements use fewer grouting sub-zones, which can simplify the construction process and improve the construction flow efficiency on the premise of ensuring the basic waterproofing effect, realizing a reasonable balance between waterproofing quality and construction efficiency.

[0028] The preset grouting sequence of the reserved water stop groove 2 is to proceed grouting from the direction from far to close to the dry dock side; in each reserved water stop groove 2, the preset grouting sub-zone grouting sequence is to uniformly take the same end of each reserved water stop groove 2 as the starting end, and sequentially grout along the one-way direction from the starting end to the other end, ensuring that the grouting flow direction of all reserved water stop grooves 2 remains consistent.

[0029] In the embodiment, since the first and second reserved water stop grooves 21 and 22 are far from the dry dock side water stop groove, and the third and fourth reserved water stop grooves 23 and 24 are close to the dry dock side water stop groove, the overall grouting sequence of the reserved water stop groove 2 is first reserved water stop groove 21→second reserved water stop groove 22→third reserved water stop groove 23→fourth reserved water stop groove 24; correspondingly, the grouting sub-zones in each reserved water stop groove 2 are sequentially advanced from the same starting end: the grouting sequence of the grouting sub-zones in the first reserved water stop groove 21 is first grouting sub-zone 3211→second grouting sub-zone 3212→third grouting sub-zone 3213, the grouting sequence of the grouting sub-zones in the second reserved water stop groove 22 is fourth grouting sub-zone 3221→fifth grouting sub-zone 3222→sixth grouting sub-zone 3223, the grouting sequence of the grouting sub-zones in the third reserved water stop groove 23 is seventh grouting sub-zone 3231→eighth grouting sub-zone 3232→ninth grouting sub-zone 3233→tenth grouting sub-zone 3234, and the grouting sequence of the grouting sub-zones in the fourth reserved water stop groove 24 is eleventh grouting sub-zone 3241→twelfth grouting sub-zone 3242→thirteenth grouting sub-zone 3243→fourteenth grouting sub-zone 3244.

[0030] This unified and progressive grouting sequence design has significant technical advantages: on the one hand, it follows the "far from the dry dock side→close to the dry dock side" advancement logic, first completes the grouting of the area with relatively low waterproofing requirements, forms a temporary protective barrier, avoids interference from external construction during subsequent grouting of critical areas (close to the dry dock side, bottom of the box-type steel beam), and reduces the risk of grouting material leaking to the dry dock side; on the other hand, the "same starting end, one-way advancement" zoning grouting method used in each reserved water stop groove 2 ensures uniform diffusion of grouting material in a fixed direction, avoiding problems such as pressure counterflow and bubble retention caused by reverse grouting in different zones, especially suitable for the high-precision filling requirements of the third and fourth reserved water stop grooves 23 and 24 (multiple zones), allowing each zone to be fully and densely filled; in addition, the unified sequence design simplifies the construction operation process, facilitates precise control of the construction pace by site personnel, improves the consistency of construction efficiency and grouting quality, and further ensures the reliability of the overall waterproof system.

[0031] In each reserved water stop groove 2, each grouting sub-zone uses a precise grouting connection method that switches immediately when the pressure meets the standard: while grouting the current grouting sub-zone, the pressure monitoring device collects grouting pressure data in real time, and when the monitored pressure reaches the preset pressure threshold, the grouting operation of the sub-zone is immediately stopped without additional waiting for the pressure to stabilize, and the grouting process of the next grouting sub-zone is immediately started, and this cycle is repeated until all grouting sub-zones in the reserved water stop groove 2 are completed; the preset pressure threshold must be strictly controlled to be no less than the upper limit of the grouting working pressure, serving as the core criterion for determining the grouting density of each sub-zone.

[0032] In this embodiment, the grouting working pressure is set to 2.0-2.5 MPa, and the corresponding preset pressure threshold is set to 2.5-3.0 MPa, which is higher than the upper limit of the grouting working pressure, ensuring that the grouting material can fully fill the gap between the reserved water stop groove 2 and extrude the internal air, and also not exceeding the structural bearing range of the reserved water stop groove 2 and the force transmission plate 6, avoiding deformation of the Q-shaped water stop belt 1, damage to the reserved water stop groove 2, or excessive overflow of the grouting material, resulting in waste due to excessive pressure.

[0033] By using pressure as a hard indicator for terminating the zoned grouting, the grouting density of each zone can be objectively quantified, effectively avoiding the problems of under-grouting (insufficient pressure) or over-grouting (excessive pressure) caused by human judgment errors, and ensuring that all zones (especially the third reserved water stop groove 23 and the fourth reserved water stop groove 24 near the dry dock side) can be uniformly and fully filled, thereby fundamentally ensuring the waterproof reliability.

[0034] In each reserved water stop groove 2, the lengths of the grouting pipes 4 corresponding to each grouting zone are different. The length of the grouting pipe 4 is adapted to the distance between the corresponding grouting zone and the grouting end, so that the grouting material can uniformly and densely fill the corresponding grouting zone. The grouting end refers to the starting point where the grouting material enters the grouting pipe 4, i.e., the output end where the grouting pipe 4 is connected to the grouting equipment. The closer the grouting zone is to the grouting end, the shorter the length of the grouting pipe 4; the farther the grouting zone is from the grouting end, the longer the length of the grouting pipe 4, ensuring that the grouting pipe 4 can accurately dock the corresponding grouting zone and avoiding problems such as grouting lag and uneven filling caused by long-distance transportation.

[0035] In each grouting zone, a grouting pipe 4 is correspondingly arranged to independently grout, avoiding interference between different zones. In this embodiment, the grouting end of each reserved water stop groove 2 is set, and the corresponding relationship and length adaptation design of the grouting zone and the grouting pipe 4 are as follows: Referring to FIG. 1, Figure 6 and Figure 7 In the first reserved water stop groove 21, the grouting end is set on one side close to the third grouting zone 3213, the first grouting zone 3211 corresponds to the first grouting pipe 4211, the second grouting zone 3212 corresponds to the second grouting pipe 4212, and the third grouting zone 3213 corresponds to the third grouting pipe 4213. Since the third grouting zone 3213 is closest to the grouting end, the third grouting pipe 4213 is the shortest in length and can directly and quickly grout; the first grouting zone 3211 is farthest from the grouting end, and the first grouting pipe 4211 is the longest in length, ensuring that the grouting material can be accurately transported to the far-end zone; the length of the second grouting pipe 4212 is between the two, which is adapted to the grouting demand of the corresponding zone.

[0036] Referring to FIG. 1, Figure 8In the second reserved water stop groove 22, the grouting end is set in accordance with the first reserved water stop groove 21, the fourth grouting sub-zone 3221 corresponds to the fourth grouting pipe 4221, the fifth grouting sub-zone 3222 corresponds to the fifth grouting pipe 4222, and the sixth grouting sub-zone 3223 corresponds to the sixth grouting pipe 4223; according to the principle that the closer to the grouting end, the shorter the pipe length, the sixth grouting sub-zone 3223 is closest to the grouting end, and the sixth grouting pipe 4223 is the shortest, the fourth grouting sub-zone 3221 is farthest from the grouting end, and the fourth grouting pipe 4221 is the longest, ensuring that each sub-zone can achieve short-distance fast grouting and long-distance accurate grouting.

[0037] Referring to the accompanying drawings Figure 9 In the third reserved water stop groove 23, the grouting end is set opposite to the first reserved water stop groove 21 and the second reserved water stop groove 22 (close to one side of the seventh grouting sub-zone 3231), the seventh grouting sub-zone 3231 corresponds to the seventh grouting pipe 4231, the eighth grouting sub-zone 3232 corresponds to the eighth grouting pipe 4232, the ninth grouting sub-zone 3233 corresponds to the ninth grouting pipe 4233, and the tenth grouting sub-zone 3234 corresponds to the tenth grouting pipe 4234; because the tenth grouting sub-zone 3234 is farthest from the reverse grouting end, the tenth grouting pipe 4234 is the longest, and the lengths of the remaining grouting pipes are shortened in turn as the distance from the grouting end decreases.

[0038] The reason for the reverse setting of the grouting end here is to adapt to the layout of the box-shaped steel beam structure 9 (the third reserved water stop groove 23 is located at the bottom of the structure, which is a key waterproof area), which can avoid crossing and winding with the grouting pipes of the first reserved water stop groove 21 and the second reserved water stop groove 22, reduce construction interference, and enable the four grouting sub-zones of the third reserved water stop groove 23 to form more balanced grouting coverage, avoiding the problem of delayed filling of the far-end sub-zone (in the case of multiple sub-zones) when grouting in one direction, and ensuring the grouting quality of the key area.

[0039] Referring to the accompanying drawings Figure 10 In the fourth reserved water stop groove 24, a double-grouting-end design is adopted, the eleventh grouting sub-zone 3241 corresponds to the eleventh grouting pipe 4241 and the twelfth grouting sub-zone 3242 corresponds to the twelfth grouting pipe 4242, one end grouting end is responsible for grouting, the eleventh grouting sub-zone 3241 is close to the grouting end, the eleventh grouting pipe 4241 is short, and the twelfth grouting pipe 4242 is long; the thirteenth grouting sub-zone 3243 corresponds to the thirteenth grouting pipe 4243 and the fourteenth grouting sub-zone 3244 corresponds to the fourteenth grouting pipe 4244, the other end grouting end is responsible for grouting, the fourteenth grouting sub-zone 3244 is close to the grouting end, the fourteenth grouting pipe 4244 is short, and the thirteenth grouting pipe 4243 is long. The double-grouting-end design of the fourth reserved water stop groove 24 can solve the problems of near-end overflow and far-end underfilling that often occur in long-distance single-end grouting, and achieve uniform filling without dead angles in the whole area.

[0040] The air injection test specifically includes: S31, close the sealing structure at the end of the grouting pipe 4 to form an independent sealed channel inside the grouting pipe 4; S32, introduce compressed air into the grouting pipe 4 through the air injection equipment, and set the test pressure to be not less than 1.2 times the subsequent grouting working pressure; S33, stop air supply after pressurizing to the set test pressure, and continuously maintain the pressure for not less than 3 minutes, during which the pressure change is monitored in real time; S34, if the pressure drop value does not exceed the pre-set allowable range during the pressure maintaining period, it is judged that the permeability of the grouting pipe 4 is qualified; if the pressure drop value exceeds the pre-set allowable range, problems such as blockage of the grouting pipe and poor sealing need to be checked and handled, and the air injection test is performed again until it is qualified.

[0041] In this embodiment, the end of the grouting pipe 4, i.e. the seamless steel pipe section 41 of the grouting pipe 4, is away from the end of the high-pressure rubber pipe section 42, and the sealing structure is a one-way sealing valve core. The one-way sealing valve core is made of high-elastic wear-resistant rubber material and has a conical structure. Its outer diameter is in interference fit with the inner diameter of the end of the seamless steel pipe section 41, and in the natural state, it is tightly attached to the inner wall of the pipe by the elastic deformation of the rubber, so as to form a sealed channel.

[0042] Combined with the grouting working pressure (2.0~2.5MPa) of this embodiment, the set test pressure of the air injection test is specifically 2.5~3.0MPa (meeting the requirement of "not less than 1.2 times the grouting working pressure"); the pre-set allowable range is set to pressure drop value≤0.1MPa, which can accurately detect the subtle blockage and pipeline damage in the grouting pipe 4, and can also avoid misjudgment caused by too strict allowable range (such as slight air pressure leakage not being a problem of the pipeline itself).

[0043] Referring to Figs. 1 and 2, Figure 4 and Figure 5 the grouting pipe 4 has a two-section structure, and the grouting pipe 4 includes a seamless steel pipe section 41 fixed to the force transmission plate 6 and located in the area of the reserved water stop groove 2, and a high-pressure rubber pipe section 42 connected to the ground and used for connecting the grouting machine. The seamless steel pipe section 41 and the high-pressure rubber pipe section 42 are fixedly connected through a corrosion-resistant sealing joint (such as a stainless steel sleeve type sealing joint), which ensures that the connection is sealed and reliable and has no risk of air and grout leakage. The high-pressure rubber pipe section 42 is connected to the ground and extends to the top of the diaphragm wall 7.

[0044] Referring to Figs. 1 and 2, Figure 9 and Figure 10The seamless steel pipe section 41 of the grouting pipe 4 can be provided with multiple sections, so that it can be flexibly arranged according to the profile of the immersed tube structure, the layout of the construction space and the installation position of the diaphragm wall 7, adapt to the complex space trend between the bottom of the pipe section and the ground, avoid obstacles such as structural reinforcement and embedded parts, and at the same time, adjust the laying angle and path according to the construction scene, and finally connect to the ground through the high-pressure rubber pipe section 42 and extend to the grouting operation platform at the top of the diaphragm wall 7.

[0045] The end of the seamless steel pipe section 41 of the grouting pipe 4 away from the high-pressure rubber pipe section 42 is provided with a check valve, the flow direction of the check valve is consistent with the grouting direction, and the check valve is used to block the grouting material, silt and external debris in the reserved water stop groove 2 from flowing back into the grouting pipe 4. In this embodiment, the check valve is specifically installed at the pipe body position of the seamless steel pipe section 41 away from the high-pressure rubber pipe section 42, about 5-10 cm away from the one-way sealing valve core.

[0046] The function adaptation logic of the air injection test and grouting is as follows: during the air injection test stage, the one-way sealing valve core is naturally closed, compressed air enters the seamless steel pipe section 41 through the high-pressure rubber pipe section 42, passes through the check valve along the flow direction, and is blocked in the pipeline by the one-way sealing valve core. When the pressure is maintained for ≥3 minutes and the pressure drop is ≤0.1 MPa, it is determined that the grouting pipe 4 is qualified in terms of permeability; during the grouting stage, the grouting material pushes the one-way sealing valve core under the action of working pressure, so that the one-way sealing valve core is elastically deformed to form a gap with the inner wall of the pipe, the grouting material flows out smoothly from the gap and is injected into the corresponding grouting partition; after stopping grouting, the grouting pressure disappears, the one-way sealing valve core automatically resets and closes, and the check valve synchronously blocks the reverse flow, so as to avoid the blockage of the grouting pipe.

[0047] In this embodiment, the two-section structure of the grouting pipe 4 adopts differentiated parameter design to accurately adapt to the needs of different construction scenes: the seamless steel pipe section 41 selects a high-strength seamless steel pipe with a pipe diameter of 30 mm and a wall thickness of 2 mm to adapt to the narrow installation space in the reserved water stop groove 2, and through the 2 mm wall thickness, the pipeline has sufficient rigidity and impact resistance, can withstand external extrusion during the construction process such as dry dock water filling and pipe section butt joint, and avoids pipeline deformation and damage. The high-pressure rubber pipe section 42 selects a high-pressure wear-resistant rubber pipe with a pipe diameter of 50 mm, which is larger than the pipe diameter of the seamless steel pipe section, can effectively reduce the resistance in the transportation process of the grouting material (especially the grouting material containing aggregate), reduce the risk of material retention and pipeline blockage, and at the same time, cooperate with its flexible characteristics, still guarantee smooth material conveying after bending. In addition, combined with the grouting working pressure of 2.0-2.5 MPa in this embodiment, the high-pressure rubber pipe section 42 selects a high-pressure wear-resistant rubber pipe with a rated pressure not less than 3.75 MPa (i.e. not less than 1.5 times the grouting working pressure), which not only can adapt to the pressure demand of normal grouting operation, but also can meet the high-pressure test of the air injection test (test pressure 2.5-3.0 MPa), avoiding the rubber pipe from bursting and leaking due to too high pressure.

[0048] In the above exemplary embodiment, the reserved water stop groove grouting method of the immersed tube bottom plate force transfer plate first forms a reserved water stop groove by arranging a Q-shaped water stop belt, then differentiates and designs the grouting partition as needed, divides more grouting partitions for the reserved water stop groove near the dry dock side at the bottom of the structure, and combines the precise adaptation of the length of the grouting pipe and the distance of the grouting partition to achieve uniform and dense filling of grouting, significantly improve the waterproof reliability and strengthen the long-term waterproof durability; At the same time, the grouting sequence of the reserved water stop groove and the grouting partition is standardized, and the pressure connection logic of the current grouting partition reaching the preset threshold value is switched to the next partition, which not only avoids cross interference of grouting and improves the efficiency of construction flow, but also ensures that each partition is grouted full and has no gap, and both construction efficiency and waterproof quality are considered, which is suitable for high-precision waterproof construction scene of the immersed tube bottom plate force transfer plate.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application rather than limit them; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.

Claims

1. A method for grouting a reserved water stop groove of a immersed tube bottom plate force transfer plate, characterized in that, The method comprises the following steps: S1, before the dry dock (8) is filled with water, a plurality of Q-shaped waterstop belts (1) are fixedly arranged on the force transmission plate (6) at the bottom plate position of the final joint end pipe section (5) along the transverse direction of the pipe section, the plurality of Q-shaped waterstop belts (1) are sequentially and parallelly arranged along the axial direction of the pipe section, and a reserved waterstop groove (2) is formed between adjacent Q-shaped waterstop belts (1); S2, each reserved waterstop groove (2) is divided into at least one grouting partition along the transverse direction of the pipe section, and one grouting pipe (4) is correspondingly arranged in each grouting partition, the embedded section of the grouting pipe (4) is fixed on the force transmission plate (6), and the embedded section of the grouting pipe (4) is parallel to the Q-shaped waterstop belt (1); S3, after the final joint end pipe section (5) is installed, air injection tests are respectively conducted on all grouting pipes (4) to detect the permeability of the grouting pipes (4); S4, grouting is sequentially performed according to a preset grouting sequence of the reserved waterstop grooves (2), and grouting is sequentially completed in each reserved waterstop groove (2) according to a preset grouting sequence of the grouting partitions.

2. The method of grouting a reserved waterstop trench of a immersed tube bedding slab according to claim 1, characterized in that, The reserved waterstop groove (2) comprises a waterstop groove away from the dry dock (8) and a waterstop groove close to the dry dock (8), the waterstop groove close to the dry dock (8) is located at the bottom of the box-shaped steel beam structure (9) of the final joint end pipe section (5), and the number of grouting partitions of the waterstop groove close to the dry dock (8) is greater than that of the waterstop groove away from the dry dock (8).

3. The method of grouting a reserved waterstop trench of a sinker base plate transfer plate according to claim 1, wherein, The preset grouting sequence of the reserved waterstop groove (2) is from the direction of the waterstop groove away from the dry dock (8) to the waterstop groove close to the dry dock (8), and in each reserved waterstop groove (2), the preset grouting sequence of the grouting partitions is from one end of the reserved waterstop groove (2) as a starting end to sequentially grouting in the direction from the starting end to the other end.

4. The method of grouting a reserved waterstop trench of a sinker base plate transfer plate according to claim 1, wherein, In each reserved waterstop groove (2), the grouting connection mode of each grouting partition is that when the grouting pressure of the current grouting partition reaches a preset pressure threshold, the grouting of the grouting partition is stopped, and then the grouting of the next grouting partition is started, until the grouting of all grouting partitions in the reserved waterstop groove (2) is completed, and the preset pressure threshold is not less than the upper limit value of the grouting working pressure.

5. The method of grouting a reserved waterstop trench of a sinker base plate transfer plate according to claim 1, wherein, In each reserved waterstop groove (2), the lengths of the grouting pipes (4) corresponding to the grouting partitions are different, the length of the grouting pipe (4) is adapted to the distance between the corresponding grouting partition and the grouting end, so that the grouting material uniformly and densely fills the corresponding grouting partition.

6. The method of grouting a reserved waterstop trench of a sunk floor platen according to claim 1, wherein, The air injection test specifically comprises: S31, a sealing structure at the end of the grouting pipe (4) is closed to form an independent closed channel in the grouting pipe (4); S32, compressed air is introduced into the grouting pipe (4) through an air injection device, and the test pressure is set to be not less than 1.2 times of the subsequent grouting working pressure; S33, after being pressurized to the set test pressure, the air supply is stopped, and the pressure is maintained for not less than 3 minutes, during which the pressure change is monitored in real time; S34, if the pressure drop value is not more than a preset allowable range during the pressure maintaining period, it is judged that the permeability of the grouting pipe (4) is qualified.

7. The method of grouting a reserved waterstop trench of a sinker base plate transfer plate according to claim 1, wherein, The grouting pipe (4) is of two-section structure, comprising a seamless steel pipe section (41) fixed to the force transmission plate (6) and located in the area of the reserved water stop groove (2), and a high-pressure rubber pipe section (42) connected to the ground and used for connecting the grouting machine, the seamless steel pipe section (41) and the high-pressure rubber pipe section (42) being fixedly connected through a sealing joint.

8. The method of grouting a reserved waterstop trench of a sinker baseplate transfer plate according to claim 7, wherein, The seamless steel pipe section (41) of the grouting pipe (4) is provided with a check valve at the end away from the high-pressure rubber pipe section (42), the flow direction of the check valve being consistent with the grouting direction, the check valve being used for blocking the grouting material, silt and external sundries in the reserved water stop groove (2) from flowing reversely into the grouting pipe (4).

9. The method of grouting a reserved waterstop trench of a sinker baseplate transfer plate according to claim 8, wherein, The pipe diameter of the seamless steel pipe section (41) is 30 mm, and the wall thickness is 2 mm, the pipe diameter of the high-pressure rubber pipe section (42) is 50 mm, and the rated pressure resistance of the high-pressure rubber pipe section (42) is not less than 1.5 times of the grouting working pressure.

10. The method of grouting a reserved waterstop trench of a sinker base plate transfer plate according to claim 8, wherein, The high-pressure rubber pipe section (42) is connected to the ground and extends to the top of the diaphragm wall (7).

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