Anti-floating structure and construction structure thereof

Abstract

The utility model discloses an anti-floating structure and a construction structure thereof, relates to the technical field of underground engineering, and solves the problem of poor stratum adaptability of the anti-floating structure of the existing underground engineering in the prior art. The anti-floating structure comprises an anti-floating structure body fixedly arranged on the outer side of the underground structure, an encircling area is formed between the anti-floating structure body and the underground structure, a reinforcing beam is arranged between the underground structure and the anti-floating structure body in a matched mode, and balance weight filler is arranged in the encircling area of the anti-floating structure body. By arranging the anti-floating structure body, the surrounding area can be formed on the outer side of the existing underground structure, then the anti-floating capacity is stably improved through the balance weight filler arranged in the surrounding area, the influence of different stratums and soil body environments on the anti-floating capacity is avoided, and adaptability is high. And by arranging the reinforcing beams, connection between the anti-floating structure body and the underground structure is facilitated, and the connection strength is improved. Meanwhile, the main part of the anti-floating structure is located on the outer side of the underground structure, and internal use functions and space of the underground structure are prevented from being occupied.

Description

TECHNICAL FIELD

[0001] The utility model relates to underground engineering technical field, especially point to a kind of anti-floating structure and its construction structure. BACKGROUND

[0002] Conventional engineering anti-floating measures include counterweight anti-floating, uplift pile anti-floating, anti-floating anchor anti-floating and water buoyancy elimination method. For new underground engineering, appropriate anti-floating measures can be determined through economic and safety comparative analysis. For existing underground engineering, with the change of environment, such as urban waterlogging disaster, underground water level recovery, etc., the original anti-floating measures may not meet the requirements. At this time, if counterweight is increased or new uplift pile is added, it will cause serious impact on the function use of the original underground engineering. Water buoyancy elimination method requires continuous monitoring of water level changes, and the operation cost is large. The cost of anti-floating anchor method is relatively small, but it is not suitable for some situations, such as “Technical Code for Rock Anchor and Shotcrete Support Engineering” (GB50086-2015), which stipulates that the anchoring section of permanent anchor shall not be arranged in untreated organic soil layer, soil layer with liquid limit wL greater than 50% or soil layer with relative density Dr less than 0.3.

[0003] The patent with application number CN202210723465.4 proposes a hole-in dynamic counterweight vehicle for anti-floating measures in pipe jacking tunnel construction. This patent mainly solves the problem of unsatisfactory anti-floating measures in the process of pipe jacking mechanized construction, but it cannot provide anti-floating measures for permanent engineering. The counterweight material of conventional counterweight method is located inside the existing structure, causing damage to the use function of the existing structure.

[0004] The patent with application number CN202111026507.0 proposes an active anti-floating design method based on anti-floating variable water level. The solution of this patent is to eliminate water buoyancy method, which needs to determine the total amount of precipitation according to the underground water level in real time and needs to be continuously operated within the service life of the project, resulting in high cost.

[0005] Chinese invention patent with publication number CN110004991B discloses an underground structure anti-floating system based on external convex wing foot plate and construction method. The external convex wing foot plate is arranged outside the main structure, penetrates the external side foundation pit support pile and is inserted into the external side soil body, thereby increasing the anti-floating capacity of the main structure and achieving the purpose of anti-floating. However, this scheme is suitable for new underground engineering construction. For existing underground engineering, the soil structure around the underground engineering has been determined. Therefore, the straight insertion type anti-floating structure inserted into the external soil body has limited anti-floating capacity improvement. In different stratum environments, the anti-floating capacity improvement degree is different, and the instability factor is large.

[0006] In view of the above, a new anti-floating solution is urgently needed, which has little impact on the existing engineering function, strong stratum adaptability, fast and convenient construction, and low overall cost. Practical new type content

[0007] In view of the deficiencies in the above background art, the utility model provides an anti-floating structure and a construction structure thereof, which solve the problem of poor stratum adaptability of the anti-floating structure for the existing underground engineering in the prior art.

[0008] The technical scheme of the utility model is as follows: an anti-floating structure, comprising an anti-floating structure body fixed outside an underground structure, a surrounding area formed between the anti-floating structure body and the underground structure, and a reinforcing beam cooperatively arranged between the underground structure and the anti-floating structure body, wherein the surrounding area of the anti-floating structure body is provided with a counterweight filler.

[0009] Preferably, a grouting weight or a compacting weight is arranged above the anti-floating structure body; and the anti-floating structure body is arranged continuously or discontinuously along the underground structure.

[0010] A construction structure of the anti-floating structure, wherein a breaking hole is arranged on the underground structure, the anti-floating structure body is fixed at both ends of the breaking hole, a reinforcing body corresponding to the breaking hole is arranged outside the underground structure, and the reinforcing body cooperates with the anti-floating structure body.

[0011] Preferably, a reinforced hole is arranged in the breaking hole, the reinforced hole is fixedly connected between the breaking hole and the reinforcing body, and the reinforced hole is connected with the reinforcing beam. A grouting pipe is arranged on the underground structure.

[0012] Preferably, the reinforcing beam is a steel structure beam or a reinforced concrete beam, the reinforcing beam is connected with the underground structure through an anchor, and an opening is arranged on the reinforcing beam to meet the requirement of the reinforced hole.

[0013] Preferably, the anti-floating structure body comprises a pair of steel pipe sections fixed in the reinforced hole, a plurality of reinforced concrete pipe sections are connected between the steel pipe sections, and arc-shaped grooves for accommodating the reinforced concrete pipe sections are arranged in the underground structure between the breaking hole and the reinforcing body, on the reinforcing body, and in the soil outside the underground structure.

[0014] Preferably, the adjacent reinforced concrete pipe sections and the reinforced concrete pipe sections and the steel pipe sections are connected through a connecting piece.

[0015] Preferably, the reinforced hole comprises a pipe body part and a baffle part connected with each other, the pipe body part is arranged in the breaking hole, and the baffle part is connected with the reinforcing beam and the underground structure through an anchor. The steel pipe section and the pipe body part are fixedly welded or connected through a bolt.

[0016] The utility model discloses an anti -floating structure has the advantages of the following: through setting anti -floating structure body, can form the area of embracing at the outside of the existing underground structure, further through the counterweight filler of setting in the area of embracing realizes the steady increase of the ability of fighting against floating, avoided the influence of different strata and soil environment to the ability of fighting against floating, and the adaptability is strong.

[0017] The construction structure of the anti -floating structure of the utility model sets up the break -up hole door and is favorable to excavation, through setting reinforcing body, improves the structural strength of anti -floating structure body and underground structure connecting portion, improves waterproof performance simultaneously. Further improve the reliability of anti -floating structure construction, improve the stability of structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the utility model embodiment, the following will be needed to use the drawing in the embodiment description briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0019] Figure 1 It is anti -floating structure schematic view of the utility model;

[0020] Figure 2 It is construction structure schematic view of the utility model;

[0021] Figure 3 It is step 1 construction structure schematic view of the utility model;

[0022] Figure 4 It is step 2 structure schematic view of the utility model;

[0023] Figure 5 It is step 3 structure schematic view of the utility model;

[0024] Figure 6 It is step 4 structure schematic view of the utility model;

[0025] Figure 7 It is step 5 structure schematic view of the utility model;

[0026] Figure 8 It is step 6 structure schematic view of the utility model;

[0027] In the figure: 1: underground structure, 2: anti-floating structure body, 3: reinforcing beam, 4: counterweight filler, 5: grouting weight, 6: breaking hole, 7: reinforcing body, 8: reinforced door, 9: grouting pipe, 10: steel pipe section, 11: reinforced concrete pipe section, 12: pipe body, 13: baffle plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] As shown in Figure 1 Figure 1, an anti-floating structure, comprising an anti-floating structure body 2 fixed outside the underground structure 1, the anti-floating structure body 2 and the underground structure 1 form a surrounding area, and a reinforcing beam 3 is arranged between the underground structure 1 and the anti-floating structure body 2. The reinforcing beam 3 can facilitate the connection of the anti-floating structure body 2 and the underground structure 1, and improve the connection strength. In actual use, the anti-floating structure body 2 can form a surrounding area outside the existing underground structure, and the floating weight of the soil above the anti-floating structure body 2 (i.e. the weight of the part of the soil minus the buoyancy of the part of the soil) cooperates with the floating weight of the original soil in the surrounding area of the anti-floating structure body 2, directly acting on the anti-floating structure body 2 and acting on the existing underground structure through the anti-floating structure body 2, thereby achieving the purpose of enhancing the anti-floating force of the existing underground structure.

[0030] Further, the surrounding area of the anti-floating structure body 2 is provided with a counterweight filler 4, which is formed by grouting and reinforcing the original soil, so as to realize the stable increase of the overall anti-floating capacity of the anti-floating structure by using the counterweight filler 4 in the surrounding area, and avoid the influence of different strata and soil environments on the anti-floating capacity, which has strong adaptability. In the embodiment, the main part of the anti-floating structure is located outside the underground structure, avoiding the occupation of the internal use function and space of the underground structure.

[0031] As a further specific embodiment, the anti-floating structure body 2 is provided with a grouting weight 5 or a compacted weight. In this embodiment, the soil above the position of the anti-floating structure body is compacted or grouted and reinforced to improve the density and form a grouting weight or a compacted weight, further improving the floating weight and thereby pressing on the anti-floating structure body, further achieving the purpose of improving the anti-floating effect.

[0032] In addition, the anti-floating structure body 2 is arranged continuously or discontinuously along the underground structure 1. In actual use, the anti-floating structure body can be arranged at equal intervals along the outside of the underground structure, or the anti-floating structure bodies can be arranged in close contact with each other, and the internal counterweight filler and the grouting weight body or the compacted weight body are used to improve the anti-floating capacity. The anti-floating structure of the embodiment is arranged outside the existing structure, which can solve the problem that the counterweight material is located inside the existing structure caused by the counterweight method, thereby damaging the use function of the existing structure; it is arranged on the side of the existing structure, which can avoid the problem that the anti-floating pile method causes the anti-floating pile to be arranged at the lower part of the existing structure, thereby causing the anti-floating pile to be unable to be arranged at the lower part of the existing structure due to the lack of construction conditions for use function; it has better stratum conditions, thereby avoiding the problem that the anti-floating anchor cannot be used in some strata, and has stronger stratum adaptability; and the cost is a one-time cost, which solves the problem of high overall cost caused by the need for continuous monitoring and long-term operation compared with the elimination of water buoyancy method.

[0033] Embodiment 2, as shown in Figure 2 、 3 The construction structure of the anti-floating structure as described in Embodiment 1, the underground structure 1 is provided with a breaking hole 6, and the breaking hole 6 is arranged to facilitate the excavation of the soil at the position of the anti-floating structure body 2. The anti-floating structure body 2 is fixed at both ends in the breaking hole 6, and the outside of the underground structure 1 is provided with a reinforcing body 7 corresponding to the breaking hole 6. The reinforcing body 7 cooperates with the anti-floating structure body 2 to improve the structural strength of the connection part of the anti-floating structure body and the underground structure, forms a reinforcing protection for the construction area of the underground structure, and improves the waterproof performance. Further improve the reliability of the anti-floating structure construction, improve the stability of the structure.

[0034] In addition, the underground structure 1 is provided with a grouting pipe 9 for injecting slurry to form a reinforcing body 7, so as to reinforce the construction area outside the breaking hole 6 on the underground structure and improve the structural reliability. Further, the grouting pipe is also arranged on the underground structure 1, and the soil in the surrounding area is grouted to form a dense grouting weight body, thereby playing a counterweight effect on the anti-floating structure body and improving the anti-floating capacity of the anti-floating structure.

[0035] Embodiment 3, on the basis of Embodiment 2, the breaking hole 6 is provided with a reinforced door hole 8, the reinforced door hole 8 is fixedly connected between the breaking hole 6, and the outer end of the reinforced door hole 8 is connected with the reinforcing beam 3.

[0036] In the embodiment, the reinforcing beam 3 is a steel structure beam or a reinforced concrete beam, and the reinforcing beam is connected to the underground structure 1 by an anchor. In the embodiment, the reinforcing beam 3 is a steel structure beam, and the reinforcing beam 3 is provided with an opening for the reinforced door hole 8 to pass through. The anchor is an anchor bolt. In addition, the reinforced door hole 8 includes a pipe body part 12 and a baffle part 13 connected to each other. The pipe body part 12 and the baffle part 13 are both made of metal and are fixedly connected by welding. The pipe body part passes through the opening on the reinforcing beam plate and is arranged in the breaking hole door 6. The baffle part is connected to the reinforcing beam 3 and the underground structure 1 by the anchor. The anchor can be an anchor bolt. When the underground structure is subjected to the buoyancy, the reinforcing beam increases the dispersion load area of the buoyancy, and simultaneously plays a role of uniformly bearing the anti-floating force transmitted by the baffle part, thereby avoiding damage to the wall surface of the underground structure.

[0037] In the embodiment 4, on the basis of the embodiment 3, the anti-floating structure body 2 includes a pair of steel pipe sections 10 fixedly arranged in the reinforced door hole 8. In the embodiment, the steel pipe sections 10 are fixedly connected to the pipe body part 12 of the reinforced door hole 8 by welding or bolting. When subjected to the upward floating force, the gravity of the counterweight filler 4 and the grouting weight body 5 in the surrounding area of the anti-floating structure body jointly generate an anti-floating force, which is applied to the steel pipe sections 10 through the anti-floating structure body, and is transmitted to the pipe body part of the reinforced door hole through the steel pipe sections, and is applied to the reinforcing beam through the baffle part connected to the pipe body part. The reinforcing beam dispersively applies the anti-floating force to the wall of the underground structure.

[0038] In addition, the anti-floating structure body further includes a plurality of reinforced concrete pipe sections 11 connected between the steel pipe sections 10. The underground structure 1 between the breaking hole door 6 and the reinforcing body 7, the reinforcing body 7, and the soil outside the underground structure 1 are provided with arc-shaped grooves for accommodating the reinforced concrete pipe sections 11. In addition, the adjacent reinforced concrete pipe sections 11 and the steel pipe sections 10 are connected by connecting members, so as to form an anti-floating structure body with local structural strength. In the embodiment, the connecting members can be connected by conventional bolts or other conventional connecting members.

[0039] In the embodiment 5, on the basis of the embodiment 4, the construction structure of the above-mentioned embodiments is constructed by the underground excavation method, as shown in Figures 2-8 , including the following steps.

[0040] 1) As shown in Figure 3 , the soil in the construction area of the existing underground structure is reinforced by using a grouting pipe to form a reinforcing body.

[0041] 2) As shown in Figure 4 , the reinforcing beam is fixed to the side wall of the existing underground structure by using an anchor.

[0042] 3) As shown in Figure 5As shown, the construction of breaking the door is carried out under the protection of the reinforcing beam, at this time the side wall of the existing underground structure leaves 50-100mm of concrete in the corresponding area of the bottom of the broken door.

[0043] 4) as shown in Figure 6 As shown, the reinforcing door is installed in the broken door, and the reinforcing door is connected with the reinforcing beam and the side wall of the existing underground structure through the anchor.

[0044] 5) as shown in Figure 7 As shown, the originating / receiving sleeve 14 is installed outside the reinforcing door, and the originating / receiving sleeve is connected with the side wall of the existing underground structure through the anchor.

[0045] 6) as shown in Figure 8 As shown, the small tunneling machine is installed through the originating sleeve, and the arc-shaped trench is excavated, and the steel pipe section and the reinforced concrete pipe section are arranged in the arc-shaped trench, wherein the steel pipe section is located at the originating end or the receiving end; the arc-shaped trench to be formed is curved, which can return to the existing underground structure through the arc-shaped path, so that the tunneling machine does not need to have a back-off function in this embodiment.

[0046] 7) After the steel pipe section and the reinforced concrete pipe section excavation construction is completed, the originating / receiving sleeve is removed, the excess part of the steel pipe section is cut off, the steel pipe section is fixed with the reinforcing door, and the hole is sealed.

[0047] 8) The area where the grouting weight body 5 and the counterweight filler 4 are located is subjected to grouting construction, thereby completing the construction of the anti-floating structure.

[0048] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-flooding structure, characterized by: The anti-floating structure body (2) is fixed outside the underground structure (1), and a surrounding area is formed between the anti-floating structure body (2) and the underground structure (1), and a reinforcing beam (3) is arranged between the underground structure (1) and the anti-floating structure body (2), and the surrounding area of the anti-floating structure body (2) is provided with a counterweight filler (4).

2. The anti-flooding structure according to claim 1, characterized in that: A grouting weight body (5) or a compacted weight body is arranged above the anti-floating structure body (2); and the anti-floating structure body (2) is arranged continuously or discontinuously along the underground structure (1).

3. A construction structure of the anti-floating structure according to any one of claims 1 to 2, characterized in that: The underground structure (1) is provided with a breaking hole (6), and the anti-floating structure body (2) is fixed at both ends of the breaking hole (6), and a reinforcing body (7) corresponding to the breaking hole (6) is arranged outside the underground structure (1), and the reinforcing body (7) is matched with the anti-floating structure body (2).

4. The construction structure of the anti-floating structure according to claim 3, characterized by: The breaking hole (6) is provided with a reinforced door hole (8), and the reinforced door hole (8) is fixedly connected between the breaking hole (6), and the reinforced door hole (8) is connected with the reinforcing beam (3).

5. The construction structure of the anti-floating structure according to claim 4, characterized by: The underground structure (1) is provided with a grouting pipe (9).

6. Construction structure of the anti-float structure according to claim 5, characterized in that: The reinforcing beam (3) is a steel structure beam or a reinforced concrete beam, and the reinforcing beam (3) is connected with the underground structure (1) through an anchor, and the reinforcing beam (3) is provided with an opening hole for the reinforced door hole (8) to pass through.

7. Construction structure with anti-floatation according to any of claims 4 to 6, characterized in that: The anti-floating structure body (2) includes a pair of steel pipe sections (10) fixed in the reinforced door hole (8), and a plurality of reinforced concrete pipe sections (11) are connected between the two steel pipe sections (10), and arc-shaped grooves for accommodating the reinforced concrete pipe sections (11) are arranged on the underground structure (1) between the breaking hole (6) and the reinforcing body (7), on the reinforcing body (7), and on the soil outside the underground structure (1).

8. Construction structure of the anti-float structure according to claim 7, characterized in that: The adjacent reinforced concrete pipe sections (11) and the reinforced concrete pipe sections (11) and the steel pipe sections (10) are connected through connecting pieces.

9. Construction structure of the anti-float structure according to claim 8, characterized in that: The reinforced door hole (8) includes a pipe body part (12) and a baffle part (13) connected with each other, the pipe body part (12) is arranged in the breaking hole (6), and the baffle part (13) is connected with the reinforcing beam (3) and the underground structure (1) through an anchor.

10. Construction structure of the anti-float structure according to claim 9, characterized in that: The steel pipe section (10) and the pipe body part (12) are welded or bolted.

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