Existing pipeline suspension protection structure applied to foundation pit construction

Abstract

The invention discloses an existing pipeline suspension protection structure applied to foundation pit construction, which comprises an upper support arranged above an existing pipeline and connected with a fixing structure; comprising a mounting part which is used for fixing the end of a connecting rope; and the supporting part is configured below the existing pipeline and is used for supporting the existing pipeline. By arranging the upper support connected with the fixing structure, the effect of hanging and supporting is achieved; the supporting part is arranged below the existing pipelines and can support the multiple existing pipelines, accidental damage to the existing pipelines is avoided, and safe operation of the pipelines is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of subway construction, and in particular to an existing pipeline suspension protection structure used in foundation pit construction. Background Art

[0002] With the rapid development of urban rail transit, the construction of subway stations is often concentrated in the central urban area of ​​the city. Due to the complexity of underground pipelines in the central urban area, many pipelines cannot be relocated during the construction of the subway foundation pit, so measures such as suspension protection must be taken to ensure the safety of these pipelines. These pipelines are crucial to the normal operation of the city. Once damaged, they will have a serious impact on the city's services and residents' lives. Therefore, how to effectively protect these existing pipelines has become a key issue in the construction process.

[0003] However, existing pipeline protection measures often have complicated construction processes, take a long time, and have high protection costs. This not only increases the difficulty of the project, but also increases the overall construction cost. At present, there is a lack of a reliable, simple and low-cost pipeline protection method on the market, which makes the construction team often face both technical and economic challenges when facing complex underground pipeline protection tasks.

[0004] In order to meet this challenge, it is necessary to develop new pipeline protection technologies or improve existing methods. The patent with publication number CN118498428A discloses a flexible protection construction method for urban underground pipe corridors that avoids the influence of existing pipelines. The above method adopts a transverse frame, a longitudinal frame and concrete piers, which are installed through detachable connections. It has a simple structure, is easy to install and can be reused. In addition, it is connected to the existing pipeline through an emergency water supply pipe, and a steel wire rope is used to assist in lifting to stagger the intersecting pipelines, which helps to increase the construction speed and ensure the construction quality. However, judging from its disclosed content, its structure is relatively simple, and it does not provide a suspension protection structure for multiple existing pipelines. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an existing pipeline suspension protection structure used in foundation pit construction, in which the existing pipeline is suspended and protected by the provided upper support and lower support.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] An existing pipeline suspension protection structure used in foundation pit construction, comprising:

[0008] Upper support: It is arranged above the existing pipeline and connected to the fixed structure; it includes a mounting part, which is used to fix the end of the connecting rope;

[0009] Supporting part: It is arranged under the existing pipeline and used to support the existing pipeline.

[0010] As a preferred embodiment, the upper support includes two adjacent upper I-beams, a steel plate is arranged on the top of the upper I-beam, and a channel steel is arranged on the bottom of the upper I-beam, and the channel steel serves as a mounting portion for fixing the end of the connecting rope;

[0011] The supporting part comprises an angle steel and a transverse I-beam. The angle steel is provided with a connecting hole and the angle steel is used for fixing with a connecting rope. The transverse I-beam is arranged at the bottom of the angle steel.

[0012] As a preferred embodiment, the steel plate is welded to the top of the upper I-beam, and the steel plate is used to connect two adjacent upper I-beams.

[0013] As a preferred method, the angle steel is welded to the transverse I-beam, and the welding adopts the full welding form.

[0014] As a preferred method, a hole is drilled on the channel steel, and the end of the connecting rope is passed through the hole of the channel steel and then fixed.

[0015] As a preferred embodiment, several connection groups are provided, each of which includes two angle steels and a transverse I-beam, with angle steels fixed at both ends of the transverse I-beam of the connection group; a group of fixing parts is correspondingly provided above each connection group, and the fixing parts include two channel steels.

[0016] As a preferred embodiment, the fixing structure includes a support pier, a pad is provided on the support pier, and embedded bolts are provided on the support pier, and the embedded bolts pass through the pad and are fixed with nuts. The upper I-beam is detachably connected to the pad, or the pad is welded and fixed to the upper I-beam.

[0017] As a preferred embodiment, it also includes a suspension hook, which includes an adjustment seat, a connecting seat and a supporting arm. The connecting seat is arranged above the adjustment seat, and supporting arms are arranged on both sides of the adjustment seat and the connecting seat; the supporting arm includes a first clamping plate and a second clamping plate, and a locking member is arranged between the first clamping plate and the second clamping plate;

[0018] The locking piece needs to cooperate with the locking bolt, an adjustment hole is provided on the support arm, and extension parts are provided on both sides of the adjustment seat. There is a space in the middle of the extension part, and the support arm is provided in the space; a through hole is provided on the extension part, and the locking bolt passes through the adjustment hole and the through hole and is connected with the nut;

[0019] The adjusting seat is provided with an adjusting support part, the adjusting support part cooperates with the adjusting member, a threaded hole is provided on the adjusting support part, the adjusting member includes a section of screw rod, the screw rod is threadably cooperated with the adjusting support part; a supporting pad is provided at the end of the screw rod;

[0020] The supporting arm includes an arc-shaped gripping portion, the supporting arm includes a first supporting arm and a second supporting arm, and bottom supports are arranged at the ends of the arc-shaped gripping portions of the first supporting arm and the second supporting arm; the two bottom supports are used to support the existing pipeline, and the support pad is used to limit the position of the existing pipeline.

[0021] As a preferred embodiment, the locking member includes a hinged portion, a locking body and a connecting portion; a first connecting rod and a second connecting rod are arranged between the first clamping plate and the second clamping plate, and the hinged portion is rotatably connected to the first connecting rod; a slot is arranged on the inner side of the locking body, and the slot cooperates with the locking bolt; the connecting portion includes an arc segment, and the arc segment cooperates with the second connecting rod; the connecting portion is also connected to an auxiliary portion, and the auxiliary portion includes a groove.

[0022] As a preferred method, when arranging pipelines, existing pipelines are arranged at least at a spacing S between existing pipelines;

[0023]

[0024] Among them, k 1 is the basic coefficient, k 2 is the load adjustment factor, k 3 is the insulation performance adjustment coefficient, k 4 is the frequency influence coefficient, P load is the load power, P max is the maximum load power, R is the insulation resistance, and f is the signal frequency;

[0025] If two adjacent existing pipelines are of different specifications, the following S final As the minimum distance between two existing pipelines;

[0026] S final =max(S 1 ,S 2 )

[0027] Among them, S 1 is the calculated spacing of the first existing pipeline, S 2 Calculated spacing for the second existing pipeline.

[0028] The present invention has at least the following beneficial effects: the present invention plays the role of a suspension support by providing an upper support connected to a fixed structure; the support portion is provided below the existing pipeline, and can support multiple existing pipelines, thereby avoiding accidental damage to the existing pipelines and ensuring the safe operation of the pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic cross-sectional view of a foundation pit for hanging and protecting existing pipelines in an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the cross-section structure of the pipeline suspension protection structure in an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the longitudinal section structure of the pipeline suspension protection structure in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the support pier structure of the pipeline suspension protection structure in an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure with a hanging grab hook in an embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the suspension grab hook structure in an embodiment of the present invention;

[0036] Figure 7 It is a partial schematic diagram of a suspension grab hook in an embodiment of the present invention;

[0037] Figure 8 is a schematic diagram of the locking member structure in an embodiment of the present invention;

[0038] In the figure, 1-upper I-beam, 2-steel plate, 3-channel steel, 4-steel rope, 5-angle steel, 6-transverse I-beam, 7-wooden wedge, 8-support pier, 9-embedded anchor bolt, 10-pad, 11-existing pipeline, 12-pipeline corridor body, 13-suspension grab hook, 14-partition, 15-support arm, 15.1-adjustment hole, 15.2-first clamping plate, 15.3-second clamping plate, 16-locking member, 16.1-hinge part, 16.2-slot, 16.3-auxiliary part, 16.4-connecting part, 17-adjusting seat, 18-connecting seat, 19-connecting head, 20-adjusting member, 21-adjusting support part, 22-suspension pipeline, 23-second supporting arm, 24-bottom support, 25-support pad. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0040] Hereinafter, different embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that the present disclosure is not limited to the specific form disclosed herein, but rather, the present disclosure should be interpreted as covering different changes, equivalents and / or replacements of the embodiments of the present disclosure. When describing the accompanying drawings, similar reference numerals may be used to indicate similar components.

[0041] The expressions used in different embodiments of the present disclosure, if there is "first", "second", "the first" or "the second" can modify different elements, regardless of order and / or importance, without limiting the corresponding elements. For example, a first user device and a second user device refer to different user devices, although both of them are user devices. For example, a first element can be referred to as a second element, and similarly, a second element can be referred to as a first element without departing from the scope of the present disclosure.

[0042] It will be understood that when an element (e.g., a first element) is referred to as being (operably or communicatively) "connected to" or "coupled to" another element (e.g., a second element), the element may be directly connected or coupled to the other element, or any other element (e.g., a third element) may be interposed therebetween. Conversely, when an element (e.g., a first element) is referred to as being "directly connected" or "directly coupled to" another element (the second element), no element (e.g., a third element) is interposed therebetween.

[0043] In the present disclosure, the terms are used to describe specific embodiments and do not limit the present disclosure. As used herein, the singular form is intended to also include the plural form, unless the content clearly indicates otherwise. In the specification, it should be understood that the term "including" or "having" represents the presence of a feature, number, step, operation, structural element, component or combination thereof, without excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, structural elements, components or combinations thereof.

[0044] It should be understood that certain details are provided in the following description to facilitate a complete understanding of the example embodiments. However, one of ordinary skill in the art should understand that the example embodiments can be implemented without these specific details. For example, the system can be shown in a block diagram to avoid obscuring the example with unnecessary details. In other examples, well-known processes, structures, and techniques may not be shown in unnecessary details to avoid obscuring the example.

[0045] like Figure 1 As shown, an existing pipeline suspension protection structure comprises:

[0046] Upper support: It is arranged above the existing pipeline 11 and connected to the fixed structure; it includes a mounting part, which is used to fix the end of the connecting rope;

[0047] Supporting portion: arranged below the existing pipeline 11 and used for supporting the existing pipeline 11 .

[0048] In this embodiment, the upper support is connected to the fixed structure, providing a stable support point, while the support part ensures the stability of the pipeline during the suspension process, preventing the pipeline from being displaced or deformed due to construction vibration or external force. The design of the installation part makes it simple and quick to fix the connecting rope, which is convenient for construction personnel to quickly install and adjust, thereby improving construction efficiency. Due to the reasonable design of the structure, the maintenance cost and construction delay caused by pipeline damage can be reduced, thereby reducing the overall project cost and improving economic benefits.

[0049] In a preferred embodiment, the upper support comprises two adjacent upper I-beams 1, a steel plate 2 is arranged on the top of the upper I-beam 1, and an inverted channel steel 3 is arranged on the bottom of the upper I-beam 1, and the channel steel 3 serves as a mounting portion for fixing the end of the connecting rope;

[0050] The support part includes an angle steel 5 and a transverse I-beam 6. The angle steel 5 is provided with a connection hole, and the angle steel 5 is used to fix with a connection rope; the transverse I-beam 6 is arranged at the bottom of the angle steel 5. This embodiment provides a support system with a stable structure and easy installation. The combination of the upper I-beam 1 and the steel plate 2 enhances the load-bearing capacity of the top; the inverted channel steel 3 at the bottom can firmly fix the connection rope to ensure safety. The connection hole on the angle steel 5 facilitates the fixation with the connection rope, making the entire structure more flexible and reliable. See Figure 1 , below the existing pipeline 11 is generally the main body of the pipe gallery 12 .

[0051] In a preferred embodiment, the steel plate 2 is welded to the top of the upper I-beam 1, and the steel plate 2 is used to connect two adjacent upper I-beams 1. Through top welding, the steel plate 2 and the I-beam form a whole, which enhances the stability and rigidity of the structure, and can better bear loads and resist deformation. The top welded steel plate 2 can adapt to I-beams of different sizes and shapes, providing greater design flexibility and being suitable for a variety of structural requirements.

[0052] In a preferred embodiment, the angle steel 5 is welded to the transverse I-beam 6, and the welding adopts the full welding form; the full welding can ensure the firmness of the connection between the angle steel 5 and the I-beam, thereby improving the stability of the entire structure. Due to the large welding area, the bearing capacity of the welded joint is enhanced and can withstand a larger load. The full welding form helps to disperse stress and reduce stress concentration points, thereby reducing the risk of fatigue failure of the structure when subjected to stress.

[0053] In a preferred embodiment, a hole is drilled in the channel steel 3, and the end of the connecting rope is passed through the hole of the channel steel 3 and then fixed; by drilling a hole in the channel steel 3 and fixing the end of the rope, the rope can be firmly connected to the channel steel 3, thereby improving the stability of the entire structure. This connection method can withstand greater tension and pressure, and reduce the safety risks caused by loosening or falling of the rope.

[0054] In a preferred embodiment, several groups of connection groups are provided, and the connection groups include two angle steels 5 and a transverse I-beam 6, and the angle steels 5 are fixed at both ends of the transverse I-beam 6 of the connection group; a group of fixing parts is correspondingly provided above each connection group, and the fixing parts include two channel steels 3. The combination of the angle steel 5 and the transverse I-beam 6 can effectively disperse the load and reduce stress concentration, thereby improving the durability of the structure. As a fixing part, the channel steel 3 can provide an additional support point, enhance the connection strength between the connection group and the upper structure, and prevent relative displacement. The overall design is beneficial to improving the stability and safety of the structure.

[0055] In a preferred embodiment, the fixed structure includes a support pier 8, on which a pad 10 is provided; the support pier 8 is provided with embedded bolts, which pass through the pad 10 and are fixed with nuts. By combining the embedded bolts with the support pier 8, it can be ensured that the equipment or structure remains stable during use and is not prone to displacement or tilting. The design of the pad 10 facilitates the installation of the upper I-beam 1. The upper I-beam 1 and the pad 10 are detachably connected, or the pad 10 is welded and fixed to the upper I-beam 1.

[0056] In a preferred embodiment, the present invention further comprises a suspension grab hook 13, the suspension grab hook 13 comprises an adjustment seat 17, a connecting seat 18 and a support arm 15, the connecting seat 18 is arranged above the adjustment seat 17, and the support arm 15 is arranged on both sides of the adjustment seat 17 and the connecting seat 18; the end of the support arm 15 is hinged to the connecting seat 18 (the support arm 15 is hinged to the connecting seat 18 through a bolt assembly, see Figure 6 ); the supporting arm 15 comprises a first clamping plate 15.2 and a second clamping plate 15.3, and a locking member 16 is provided between the first clamping plate 15.2 and the second clamping plate 15.3;

[0057] The locking member 16 needs to cooperate with the locking bolt, and the support arm 15 is provided with an adjustment hole 15.1 (generally a waist-shaped hole, such as Figure 6 As shown, the through hole is an oblique waist-shaped hole), and an extension portion is provided on both sides of the adjustment seat 17. There is a space in the middle of the extension portion, and the support arm 15 is provided in the space; a through hole is provided on the extension portion, and the locking bolt passes through the adjustment hole 15.1 and the through hole and is connected with the nut;

[0058] The adjusting seat 17 is provided with an adjusting support portion 21, which cooperates with the adjusting member 20. The adjusting support portion 21 is provided with a threaded hole. The adjusting member 20 includes a screw rod, which is threadedly matched with the adjusting support portion 21. A supporting pad 25 is provided at the end of the screw rod.

[0059] The supporting arm 15 includes an arc-shaped gripping portion, and the supporting arm 15 includes a first supporting arm and a second supporting arm 23. The ends of the arc-shaped gripping portions of the first supporting arm and the second supporting arm 23 are provided with bottom supports 24; the two bottom supports 24 are used to support the existing pipeline 11, and the support pad 25 is used to limit the position of the existing pipeline 11; the two bottom supports 24 and one support pad 25 form three supporting points for suspending the existing pipeline 11.

[0060] The existing pipeline 11 generally has a casing on the outside, so it can be directly placed on the support without deliberately considering the spacing of the existing pipeline 11. However, when the existing pipeline 11 has no casing or the adjacent existing pipeline 11 will interfere, it is necessary to separate the existing pipeline 11. Figure 5 As shown, this embodiment provides a suspension grab hook 13 , through which the existing pipeline 11 that needs to be deliberately separated is suspended to avoid interference with other existing pipelines 11 .

[0061] In this embodiment, the setting of the adjustment seat 17 and the connecting seat 18 allows the user to adjust according to the size of the pipeline to ensure that the existing pipeline 11 can be stably suspended. The double-ply plate design of the support arm 15 cooperates with the locking member 16 to firmly fix the pipeline. It should be noted that a rubber pad can be provided on the bottom support 24, and a rubber pad can also be provided on the side of the support pad 25 opposite to the existing pipeline 11. Due to the dead weight of the existing pipeline 11, the friction between the existing pipeline 11 and the rubber pad of the bottom support 24 is relatively large, and the existing pipeline 11 is not easy to rotate. The rubber pad of the support pad 25 is also to increase its friction with the existing pipeline 11.

[0062] The threaded fit between the adjusting support 21 and the adjusting member 20 can fix the existing pipeline 11 at three points even if the existing pipeline 11 has different sizes. The adjustment is also convenient and practical. The suspension hook 13 improves the efficiency and safety of the existing pipeline 11 suspension operation, and is also easy to install and adjust. It meets the requirements for the hoisting of high-power cables and avoids the problem of using only the transverse I-beam 6 to hoist in a large space.

[0063] like Figure 5 As shown, in order to avoid contact between the existing pipelines 11 , a separator 14 , such as a rubber piece, can be set between the existing pipelines 11 on the transverse I-beam 6 . The separator 14 , such as a rubber piece, can be made into a structure with a small top and a large bottom to cooperate with the round tube of the existing pipeline 11 .

[0064] Working principle: First, adjust the adjustment member 20 to the upper position, loosen the locking bolt of the adjustment seat 17, use the suspension hook 13 to clamp the existing pipeline 11 to be hoisted, and after the existing pipeline 11 is placed on the bottom support 24, fix the locking member 16 and the support arm 15, and adjust the adjustment member 20 so that the support pad 25 contacts the existing pipeline 11, preferably tightly. In this way, the effect of the suspension hook 13 grabbing the existing pipeline 11 is achieved, and the connector 19 set on the connection seat 18 is hoisted by the connecting rope (steel rope), and the connecting rope is preferably fixed on the channel steel 3 under the upper I-beam 1.

[0065] In a preferred embodiment, if Figure 7 or Figure 8 As shown, the locking member 16 includes a hinged portion 16.1, a locking body and a connecting portion 16.4; a first connecting rod and a second connecting rod are arranged between the first clamping plate 15.2 and the second clamping plate 15.3, and the hinged portion 16.1 is rotatably connected to the first connecting rod; a slot 16.2 is arranged on the inner side of the locking body, and the slot 16.2 cooperates with the locking bolt; the connecting portion 16.4 includes an arc segment, and the arc segment cooperates with the second connecting rod; the connecting portion 16.4 is also connected to an auxiliary portion 16.3, and the auxiliary portion 16.3 includes a groove.

[0066] The locking process is as follows: Preliminary locking: Rotate the locking body so that the arc section of the connecting part 16.4 is stuck on the second connecting rod, and the slot 16.2 limits the middle part of the locking bolt (the middle part of the locking bolt can be a smooth section or a threaded section. Preferably, a layer of rubber is coated on the middle part of the locking bolt to enhance the connection between the locking bolt and the slot 16.2), that is, the adjustment seat 17 is preliminarily fixed. Complete locking: Fix the nut and the locking bolt, and the two support plates of the extension part approach the locking body as the nut is screwed in, until the locking body is completely clamped, so that the locking body cannot rotate, and the locking member 16 is completely fixed. Preferably, a plurality of vertical grooves (for example, 10 vertical grooves) are provided on the inner side of the two support plates of the extension part, and the vertical grooves cooperate with the edges of the locking body. After being in place, the locking body is placed in a certain vertical groove, so that the locking body is completely fixed. Furthermore, a plurality of convex points or protrusions may be provided on the locking body, and the convex points or protrusions are located in a certain vertical groove or some of the vertical grooves after the support plate clamps the locking body.

[0067] In a preferred embodiment, when arranging the pipelines, the existing pipelines 11 are arranged at least at a spacing S between the existing pipelines 11;

[0068]

[0069] Among them, k 1 is a basic coefficient, which is usually set at 5-10, indicating the basic safety distance between existing pipelines 11 (or cables or wires) when there are no other influencing factors;

[0070] k 2 The load adjustment factor can range from 0.5 to 2.0, which is used to reflect the impact of the ratio of the load power of the cable / cable to the maximum load power on the safety interval. A higher value means that the interval will be increased.

[0071] k 3 It is the insulation performance adjustment coefficient, which can range from 5 to 15. It reflects the influence of insulation resistance (cable jacket) on cable spacing. The greater the insulation resistance, the smaller the spacing between cables.

[0072] k 4 The frequency influence coefficient can range from 1 to 3, which is used to indicate the influence of the signal frequency on the spacing between cables. The higher the frequency, the larger the spacing between cables.

[0073] P load is the existing pipeline 11 cable load power, P max is the maximum load power of the existing pipeline 11 cable, R is the insulation resistance of the existing pipeline 11 cable, and f is the signal frequency of the existing pipeline 11 cable, in Hz (Hertz), which indicates the frequency of the signal transmitted in the cable. The higher the frequency, the longer the interval between the cables.

[0074] It should be noted that the above formula is an empirical formula, and the required parameters are values ​​converted into standard units. The S value obtained after calculation plus mm is the spacing.

[0075] If the cables of two adjacent existing pipelines 11 are of different specifications, the following formula is used: final As the minimum distance between two existing pipelines 11;

[0076] S final =max(S 1 ,S 2 )

[0077] Among them, S 1 is the calculated spacing of the first existing pipeline 11, S 2 The spacing calculated for the second existing pipeline 11.

[0078] Examples:

[0079] The first existing pipeline 11:

[0080] Load power P load,1 =200W

[0081] Maximum load power P max,1 =500W

[0082] Insulation resistance R 1 =10MΩ=10,000,000Ω

[0083] The second existing pipeline 11:

[0084] Load power P load,2 =500W

[0085] Maximum load power P max,2 =1000W

[0086] Insulation resistance R 2 =15Ω=15,000,000Ω

[0087] Selection coefficient k 1 =10, k 2 =1.5, k 3 =10, k 4 =2, f=100Hz.

[0088] According to the formula, S 1 =20mm, S 2 =21.5mm.

[0089] S final =max(S 1 ,S 2 )=max(20mm,21.5mm)=21.5mm.

[0090] Finally, the minimum spacing between the first existing pipeline 11 and the second existing pipeline 11 should be 21.5 mm. When the first existing pipeline 11 and the second existing pipeline 11 are arranged, the spacing between them cannot be less than 21.5 mm, and can be 21.5 mm, 22 mm or 23 mm, or even larger.

[0091] At present, in the construction of urban rail transit, a large number of subway stations are built in the central urban area of ​​the city. The existing underground pipelines 11 in the central urban area are extremely complex. A large number of underground pipelines cannot be relocated during the construction of the subway foundation pit, so they can only be protected by suspension protection. Once the existing underground pipelines are damaged, it will have a great impact on the normal operation of the city. Therefore, the protection of the existing pipelines 11 has become a construction focus. The existing pipelines originally had a complex construction process, a long construction period, and a high protection cost. There is a lack of a protection measure with high protection reliability, simple construction, and low protection cost.

[0092] The present invention avoids interference with the existing pipelines 11 through two measures. One is to suspend the existing pipelines 11 with high power or that need to be hoisted separately (the suspension pipeline 22) to separate it from the transverse I-beam 6 or the relatively dense pipelines on the supporting part; the second is to calculate so that there is a reasonable spacing between adjacent existing pipelines 11 to avoid interference with adjacent existing pipelines 11.

[0093] Finally, the present invention also provides a suspension protection structure for an existing pipeline 11 used in foundation pit construction, and the implementation steps are as follows:

[0094] Step 1: Before the foundation pit is officially implemented, the location and elevation of the existing pipelines 11 within the scope of the foundation pit construction should be further explored to determine which pipelines need in-situ suspension protection. For pipelines that need in-situ suspension protection, the direction of the existing pipelines 11 should be marked on the ground, and the positions of the supports at both ends of the pipeline protection structure should be marked.

[0095] Step 2: According to the marked position of the support pier 8 of the existing pipeline 11 protection structure, excavate the support pier 8, pour the concrete of the pier, and pre-embed the anchor bolt 9 in the pier concrete.

[0096] Step 3: Construct the steel structure longitudinal beam of the upper part of the protection structure. The upper longitudinal beam is composed of two parallel upper I-beams 1. The top of the upper I-beam 1 is welded with a steel plate 2 to connect the two I-beams as a whole. The spacing of the steel plates 2 can be 500mm to 1000mm. The lower part of the upper I-beam 1 is welded with a channel steel 3. The flange of the channel steel 3 is opened to fix the steel rope 4 (flexible steel rope 4) of the protection lower structure. The upper structure and the lower structure of the protection structure are connected by a flexible steel rope 4, which has a high bearing capacity and a high deformation adaptability.

[0097] Step 4: A steel pad 10 is set at each end of the support of the double I-beam of the upper longitudinal beam. The steel pad 10 is connected to the lower flange of the upper I-beam 1 by welding. The pad 10 is connected to the support pier 8 by bolts through embedded anchor bolts 9, so as to fix the support of the upper structure of the protective structure to avoid left and right movement or instability of the protective steel structure.

[0098] Step 5: Excavate the foundation pit until it reaches 0.5m above the existing pipeline 11, and then use manual or small machinery to excavate downward. After excavating to the bottom of the pipeline, mark the position of the horizontal I-beam 6 where the lower part of the protective structure needs to be set.

[0099] Step 6: Pass the transverse I-beam 6 under the existing pipeline 11 to be protected, so that the existing pipeline 11 is placed horizontally on the transverse I-beam 6. Fix the edges of the existing pipeline 11 on both sides with wooden wedges 7 (see Figure 2 ).

[0100] Step 7: The upper parts of both ends of the transverse I-beam 6 are connected to the equilateral angle steel 5 by welding. The equilateral angle steel 5 is provided with openings through which the steel rope 4 passes. The steel rope 4, the transverse I-beam 6 and the angle steel 5 together form the lower structure of the pipeline protection structure.

[0101] Step 8: According to the elevation of the existing pipeline 11, adjust the length of the flexible steel rope 4, and after the length of all the steel ropes 4 is adjusted to a suitable level, fix the upper and lower ends of the steel ropes 4.

[0102] Step 9: After the entire pipeline protection structure is implemented, continue to excavate the foundation pit until the bottom of the foundation pit is excavated. During the foundation pit construction, the displacement and deformation of the existing pipeline 11 and the pipeline protection structure should be monitored.

[0103] The upper structure of the existing pipeline 11 protection structure of the present invention: the steel structure longitudinal beam of the upper part of the protection structure is composed of two parallel I-beams, the top of the I-beam is welded and connected with a steel plate 2, and the two I-beams are connected as a whole, and the spacing of the steel plates 2 can be 500mm to 1000mm. The lower part of the I-beam is welded and connected with a channel steel 3. The flange of the channel steel 3 is opened to fix the flexible steel rope 4 protecting the lower structure.

[0104] The lower structure of the existing pipeline 11 protection structure of the present invention is as follows: a transverse I-beam 6 is passed through the lower side of the existing pipeline 11 to be protected, so that the existing pipeline 11 is horizontally placed on the transverse I-beam 6. The existing pipeline 11 is fixed at the edge by a wooden wedge 7. The upper parts of both ends of the transverse I-beam 6 are connected to the equilateral angle steel 5 by welding. The equilateral angle steel 5 is provided with an opening through which the steel rope 4 is passed. The steel rope 4, the transverse I-beam 6 and the angle steel 5 together form the lower structure of the pipeline protection structure.

[0105] The support pier 8 of the present invention has the following structure: a steel pad 10 is respectively arranged at both ends of the support of the double-piece I-beam of the upper longitudinal beam, the steel pad 10 is connected to the lower flange of the I-beam by welding, and the pad 10 and the support pier 8 are connected by bolts through embedded anchor bolts 9, thereby fixing the support of the upper structure of the protective structure to avoid left and right movement or instability of the protective steel structure.

[0106] Compared with the existing pipeline protection technology, the obvious advantages of this embodiment are:

[0107] 1. The existing pipeline 11 protection structure of the present invention adopts pre-embedded anchor bolts 9 in the support pier 8, and the entire protection structure can be effectively fixed by fixing the anchor bolts to the upper main steel beam.

[0108] 2. The upper structure and the lower structure of the protection structure are connected by a flexible steel rope 4, which has high bearing capacity and high deformation adaptability. It can effectively adapt to the elevation change of the existing pipeline 11 and is applicable to both rigid pipelines and flexible pipelines.

[0109] 3. The existing pipeline 11 protection structure described in this embodiment has a simple and reasonable structure, low engineering cost, and can be reused.

[0110] 4. The pipeline protection structure includes: an upper structure of a suspension protection structure, a lower structure of a suspension protection structure, and a suspension protection structure support pier 8 structure. This embodiment can effectively reduce the impact of foundation pit construction on existing pipelines 11, avoid damage to existing pipelines 11 during foundation pit construction, improve the overall construction efficiency of the foundation pit, and guide the refined construction of the foundation pit.

[0111] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An existing pipeline suspension protection structure used in foundation pit construction, characterized in that: include: Upper support: It is arranged above the existing pipeline and connected to the fixed structure; It includes a mounting portion, which is used to fix the end of the connecting rope; Supporting part: It is arranged under the existing pipeline and used to support the existing pipeline.

2. According to claim 1, the existing pipeline suspension protection structure used for foundation pit construction is characterized by: The upper support includes two adjacent upper I-beams, a steel plate is arranged on the top of the upper I-beam, and an inverted channel steel is arranged on the bottom of the upper I-beam, and the channel steel serves as a mounting part for fixing the end of the connecting rope; The supporting part comprises an angle steel and a transverse I-beam. The angle steel is provided with a connecting hole and the angle steel is used for fixing with a connecting rope. The transverse I-beam is arranged at the bottom of the angle steel.

3. The existing pipeline suspension protection structure used in foundation pit construction according to claim 2 is characterized in that: The steel plate is welded to the top of the upper I-beam, and the steel plate is used to connect two adjacent upper I-beams.

4. The existing pipeline suspension protection structure used in foundation pit construction according to claim 2 is characterized in that: The angle steel is welded to the transverse I-beam, and the welding adopts the full welding form.

5. The existing pipeline suspension protection structure used in foundation pit construction according to claim 1 is characterized by: Drill a hole on the channel steel, pass the end of the connecting rope through the hole of the channel steel and fix it.

6. The existing pipeline suspension protection structure used in foundation pit construction according to claim 1 is characterized by: A plurality of connection groups are provided, the connection groups include two angle steels and a transverse I-beam, and the angle steels are fixed at both ends of the transverse I-beam of the connection group; a group of fixing parts is correspondingly provided above each connection group, and the fixing parts include two channel steels.

7. The existing pipeline suspension protection structure used in foundation pit construction according to claim 1 is characterized by: The fixed structure comprises a support pier, on which a pad is arranged; the support pier is provided with embedded bolts, which pass through the pad and are fixed with nuts.

8. The existing pipeline suspension protection structure used in foundation pit construction according to claim 1 is characterized by: The upper I-beam is detachably connected to the pad.

9. The existing pipeline suspension protection structure used in foundation pit construction according to claim 1 is characterized by: It also includes a suspension hook, which includes an adjustment seat, a connecting seat and a supporting arm. The connecting seat is arranged above the adjustment seat, and supporting arms are arranged on both sides of the adjustment seat and the connecting seat; the supporting arm includes a first clamping plate and a second clamping plate, and a locking member is arranged between the first clamping plate and the second clamping plate; The locking piece needs to cooperate with the locking bolt, an adjustment hole is provided on the support arm, and extension parts are provided on both sides of the adjustment seat. There is a space in the middle of the extension part, and a supporting wall is provided in the space; a through hole is provided on the extension part, and the locking bolt passes through the adjustment hole and the through hole and is connected with the nut; The adjusting seat is provided with an adjusting support part, the adjusting support part cooperates with the adjusting member, a threaded hole is provided on the adjusting support part, the adjusting member includes a section of screw rod, the screw rod is threadably cooperated with the adjusting support part; a supporting pad is provided at the end of the screw rod; The supporting arm includes an arc-shaped gripping portion, the supporting arm includes a first supporting arm and a second supporting arm, and bottom supports are arranged at the ends of the arc-shaped gripping portions of the first supporting arm and the second supporting arm; the two bottom supports are used to support the existing pipeline, and the support pad is used to limit the position of the existing pipeline.

10. The existing pipeline suspension protection structure used in foundation pit construction according to claim 9 is characterized in that: The locking member includes a hinged portion, a locking body and a connecting portion; a first connecting rod and a second connecting rod are arranged between the first clamping plate and the second clamping plate, and the hinged portion is rotatably connected to the first connecting rod; a slot is arranged on the inner side of the locking body, and the slot cooperates with the locking bolt; the connecting portion includes an arc segment, and the arc segment cooperates with the second connecting rod; the connecting portion is also connected to an auxiliary portion, and the auxiliary portion includes a groove.

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