Pipeline construction excavation foundation pit support anti-collapse device

Abstract

This utility model discloses a collapse prevention device for pipeline construction excavation pit support, including a main support frame structure with a construction manhole located within it; it also includes secondary support structures positioned on both sides of the main support frame structure; the main support frame structure includes support frames supported on the pit walls on both sides, the support frames being pushed and moved between each other by a first pushing structure; the secondary support structures include secondary support brackets slidably installed on the support frames; the secondary support brackets are pushed and moved by a second pushing structure. This structure enables more stable and safer support of the excavated pipeline pit during pipeline manhole construction, with high support stability and less labor required, thus greatly improving construction efficiency while ensuring construction safety.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline construction support technology, and in particular relates to a pipeline construction excavation pit support and anti-collapse device. Background Technology

[0002] During pipeline construction excavation, such as for the construction of manholes, a foundation pit needs to be excavated beforehand, and the size of the foundation pit is often determined by the size of the manhole. Especially during the construction of large-diameter manholes, the foundation pit is often quite deep and high. Consequently, with the increased size of the foundation pit, if the pit walls collapse while workers are working inside, it can easily bury equipment and damage the still-uncured concrete structure.

[0003] Therefore, in order to improve construction safety, it is often necessary to use a protective plate method to support the foundation pit when constructing such large wells. Specifically, the protective plate is placed on the pit wall, and then supported by numerous support rods.

[0004] Therefore, a large number of support plates are often laid in the foundation pit area. However, the risk of support plate support is also high because the support plates are supported on the foundation pit wall. Once the foundation pit wall is eroded by rainwater or other factors, it is more likely to collapse or landslide. At this time, the support plates cannot effectively and stably support the main foundation pit.

[0005] Once the support plate collapses, the heavy support plate will cause even greater damage to the construction equipment and the building structures under construction.

[0006] Furthermore, this method of support with support plates is too complicated to operate, and the anchoring, installation and support of the support rods are even more complicated.

[0007] Therefore, adopting a support device that is highly stable, provides high support safety, and is simple, labor-saving, and efficient to operate is crucial for improving the efficiency and safety of well construction. Utility Model Content

[0008] Based on the above background, the purpose of this utility model is to provide a device for preventing collapse during pipeline construction excavation pit support.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A collapse prevention device for excavation pit support during pipeline construction, characterized in that it includes a main support frame structure, and the construction manhole is located within the main support frame structure;

[0011] It also includes secondary support structures located on both sides of the main support frame structure;

[0012] The main support frame structure includes a support frame supported on both sides of the pit wall, and the support frames are pushed and moved by a first pushing structure.

[0013] The secondary support structure includes secondary support brackets that are slidably installed on the support frame; the secondary support brackets are pushed and propelled by a second pushing structure.

[0014] Preferably, the main support frame structure includes a first support frame and a second support frame symmetrically arranged on both sides;

[0015] Short slide rails are fixedly connected to the top and bottom of both ends of the first support frame, and short slide rails are fixedly connected to the top and bottom of both ends of the second support frame.

[0016] The inner end of the secondary support bracket rolls between short slide rails via an inner roller pulley structure.

[0017] Preferably, the secondary support frame includes a first movable support plate that is slidably installed on both sides of the first support frame and a second movable support plate that is slidably installed on both sides of the second support frame.

[0018] The first movable support plate and the second movable support plate are fixedly connected with support plates that support the foundation pit wall.

[0019] Preferably, the roller structure includes inner rollers that are fixedly installed at the top and bottom positions of the first movable support plate and the second movable support plate, respectively;

[0020] The short slide rail has a short rail groove with a limit inner roller.

[0021] Preferably, an outer track structure is provided between the outer ends of the first movable support plate and the second movable support plate.

[0022] Preferably, the outer track structure includes an outer long track arranged symmetrically at the top and bottom, and the outer ends of the first movable support plate and the second movable support plate are rolled between the outer long tracks by an outer rolling pulley structure;

[0023] The outer roller pulley structure includes outer rollers that are fixedly installed at the top and bottom positions of the first movable support plate and the second movable support plate, and a track support rod is fixedly connected between the central parts of the outer long track.

[0024] The outer track has a track groove with a limiting outer rolling pulley.

[0025] Preferably, the first pushing structure includes a pair of first hydraulic cylinders that push the first support frame and the second support frame away from each other;

[0026] The first hydraulic cylinder pushes between the two short slide rails.

[0027] Preferably, a rail connecting beam is fixedly connected between the short slide rails;

[0028] The piston rods at both ends of the first hydraulic cylinder are fixedly installed on the slide rail connecting beam.

[0029] Preferably, the second pushing structure includes a second hydraulic cylinder for pushing the first movable support plate and the second movable support plate away from each other, and the plunger rods at both ends of the second hydraulic cylinder are fixedly installed on the first movable support plate and the second movable support plate.

[0030] Preferably, rollers are installed at the bottom of both the first and second support frames.

[0031] This utility model has the following beneficial effects:

[0032] 1. During the operation, as the first hydraulic cylinder pushes, the first and second support frames on both sides simultaneously move outwards and fully press against the pit wall. The first and second support frames support the pit wall at the well construction location, thus protecting the well, construction equipment, and personnel.

[0033] 2. The extended support structure, consisting of the first movable support plate-support plate and the second movable support plate-support plate, extends the support along the length of the foundation pit, thereby further increasing the support effect on the foundation pit and enhancing the safety of construction. This extended support solves the problem of damage to wells, construction equipment, and personnel in the event of a severe collapse.

[0034] 3. The hydraulic structure enables automatic pushing support, which greatly reduces the labor intensity of support work. At the same time, the hydraulic support method has higher stability, higher safety, and greater ease of operation.

[0035] 4. Through the design of the inner and outer roller pulley structure, the heavy first moving support plate-support plate and second moving support plate-support plate can be pushed into the support state more easily during the support process, making the operation more labor-saving. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0038] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0039] Figure 3 This is a schematic diagram of the structure of the inner roller pulley rolling on the inner slide rail in an embodiment of the present utility model;

[0040] Figure 4 This is a schematic diagram of the structure of the first support frame and the second support frame with rollers installed in this embodiment of the present invention;

[0041] Figure 5 This is an embodiment of the present utility model. Figure 2 The right view in the image.

[0042] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0045] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0046] Example 1

[0047] like Figure 1-5As shown, a pipeline construction excavation pit support and anti-collapse device includes a main support frame structure 1, and a construction well 2 located inside the main support frame structure 1.

[0048] That is, the pit walls on both sides of the well 2 in the pit are supported by the main support frame structure 1.

[0049] Specifically, the main support frame structure 1 includes a first support frame 11 and a second support frame 14 symmetrically arranged on the left and right sides. The heights of the first support frame 11 and the second support frame 14 correspond to the height of the foundation pit.

[0050] In order to effectively support the foundation pit walls on both sides during construction, the first support frame 11 and the second support frame 14 are pushed and propelled by the first pushing structure.

[0051] During construction, the first support frame 11 and the second support frame 14 are pre-supported on the two side walls of the pit. Then, the first support frame 11 and the second support frame 14 on the left and right sides are pushed outward by the pushing structure until they are fully pressed against the pit wall.

[0052] Specifically, the first pushing structure includes a pair of first hydraulic cylinders 12 that push the first support frame 11 and the second support frame 14 away from each other. Specifically, there are a total of four first hydraulic cylinders 12, two of which are distributed on the front and two of the rear sides.

[0053] That is, each pair of first hydraulic cylinders 12 is arranged in front and behind. Specifically, the first hydraulic cylinder 12 is a double piston rod hydraulic cylinder disclosed in the prior art. The piston rods on both sides of the first hydraulic cylinder 12 are respectively installed between the first support frame 11 and the second support frame 14.

[0054] The specific installation location is on the slide rail connecting beam 131, and the method is as follows: the connecting seat is fixedly installed on the plunger rod, and the connecting seat is fastened to the slide rail connecting beam 131 by bolts.

[0055] Meanwhile, a pair of rollers 15 spaced apart front and rear are respectively installed at the bottom of the first support frame 11 and the second support frame 14.

[0056] During operation, as the first hydraulic cylinder 12 pushes, the first support frame 11 and the second support frame 14 on both sides move outwards simultaneously and press against the pit wall.

[0057] Example 2

[0058] like Figure 1-5As shown, this embodiment, based on the structure of embodiment 1, uses the aforementioned main support frame structure 1 to support the pit walls on both sides of the manhole 2. However, during construction, in order to increase the support effect, the length of the supported pit needs to be increased to avoid damage to the manhole 2, personnel, and equipment in the event of a severe collapse. Therefore, it is often necessary to increase the support length.

[0059] Therefore, secondary support structures are installed on both the front and rear sides of the main support frame structure 1. These secondary support structures extend the support structure.

[0060] Specifically, the secondary support structure includes secondary support brackets that are slidably installed on the support frame; specifically, the secondary support brackets include a first movable support plate 21 that is slidably installed on the front and rear sides of the first support frame 11 and a second movable support plate 27 that is slidably installed on the front and rear sides of the second support frame 14.

[0061] Meanwhile, support plates 22, which are fixedly connected to the first movable support plate 21 and the second movable support plate 27 and supported on the pit wall, are fixedly installed (the support plates 22 and the corresponding first movable support plates 21 and second movable support plates 27 are fixedly installed through several connecting columns 28). During the support process achieved by the first movable support plate 21 and the second movable support plate 27, the support plates 22 are moved and supported on the extended pit wall of the pit.

[0062] Since the support plate 22 is for extended support, its length is often increased in order to increase the length of the support pit wall.

[0063] Therefore, in order to more easily support the first movable support plate 21-support plate 22 and the second movable support plate 27-support plate 22 structures on the roadway wall in a way that keeps them away from each other, the first movable support plate 21 and the second movable support plate 27 are moved by rolling.

[0064] Specifically, short slide rails 13 are fixedly connected to the top and bottom of the front and rear ends of the first support frame 11, and short slide rails 13 are fixedly connected to the top and bottom of the front and rear ends of the second support frame 14 (a slide rail connecting beam 131 is fixedly connected between the inner ends of the short slide rails 13, and the piston rod of the first hydraulic cylinder 12 is fixed on the slide rail connecting beam 131).

[0065] Correspondingly, the inner end of the secondary support bracket rolls between the short slide rails 13 via an inner roller pulley structure. Specifically, the roller pulley structure includes inner roller pulleys 23 fixedly installed at the top and bottom positions of the first movable support plate 21 and the second movable support plate 27, respectively; correspondingly, short rail grooves for limiting the inner roller pulleys 23 are provided on the short slide rails 13, and the inner roller pulleys 23 roll in the short rail grooves to prevent them from slipping off.

[0066] Similarly, the outer ends of the first movable support plate 21 and the second movable support plate 27 are connected by an outer track structure.

[0067] Specifically, the outer track structure includes an outer long track 25 arranged symmetrically at the top and bottom. The outer ends of the first movable support plate 21 and the second movable support plate 27 are rolled between the outer long tracks 25 by an outer rolling pulley structure (similarly, track grooves are opened on the outer long track 25).

[0068] The outer roller pulley structure includes outer roller pulleys 24 that are fixedly installed at the top and bottom of the first movable support plate 21 and the second movable support plate 27 respectively, and a track support rod 26 is fixedly connected between the center parts of the outer long track 25.

[0069] The outer roller 24 is limited to rolling within the track groove to prevent it from slipping off.

[0070] The aforementioned secondary support frame is pushed forward by the second pushing structure.

[0071] Specifically, the second pushing structure includes a second hydraulic cylinder 29 for pushing the first movable support plate 21 and the second movable support plate 27 away from each other, with the plunger rods at both ends of the second hydraulic cylinder 29 fixedly mounted on the first movable support plate 21 and the second movable support plate 27.

[0072] During operation, when the first movable support plate 21-support plate 22 and the second movable support plate 27-support plate 22 need to support the pit wall, the movable support plates on both sides are driven by the second hydraulic cylinder 29.

[0073] Because of the use of inner and outer tracks and inner and outer rollers 24, the movable support plates-support plates 22 on both sides can be pushed more easily and stably supported on the pit during the pushing process.

[0074] The advantages of using inner and outer tracks and inner and outer rollers 24 are that during the pushing and supporting process of the first support frame 11 and the second support frame 14, the rollers connect the first support frame 11 and the second support frame 14 with the first movable support plate 21 and the second movable support plate 27, so the two do not interfere with each other. The advantage is that it avoids excessive load on the hydraulic cylinder.

[0075] The aforementioned second hydraulic cylinder 29 is a prior art double-plunger rod hydraulic cylinder. Similarly, the plunger rods at both ends are installed at the center of the first movable support plate 21 and the second movable support plate 27 through connecting seats.

[0076] Example 3

[0077] like Figure 1-5As shown, in this embodiment, based on the structure of embodiment 2, the first hydraulic cylinder 12 and the second hydraulic cylinder 29 are conventional double-piston hydraulic cylinders in the prior art. The thrust is selected by selecting a specific model of hydraulic cylinder after actual debugging. The thrust is determined by the size of the pit, which requires the adaptation of different models and sizes of the first support frame 11, the second support frame 14, the first movable support plate 21, and the second movable support plate 27. Therefore, the thrust load is different.

[0078] The four first hydraulic cylinders 12 operate synchronously using a conventional hydraulic cylinder synchronous drive method disclosed in the prior art, employing a hydraulic circuit system disclosed in the prior art. Similarly, the second hydraulic cylinder 29 operates synchronously using a hydraulic circuit system disclosed in the prior art.

[0079] Those skilled in the art can learn by consulting technical manuals and dictionaries how the first hydraulic cylinders 12 and the second hydraulic cylinders 29 work synchronously.

[0080] In order to more accurately reflect the support status of the foundation pit and tunnel, sensors, such as pressure sensors (not shown in the figure), can be installed on the first support frame 11, the second support frame 14 and the support plate 22 as described above, so as to realize the feedback of the magnitude of the support force.

[0081] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A device for preventing collapse during pipeline construction excavation pit support, characterized in that, Includes the main support frame structure, with the construction manhole located within the main support frame structure; It also includes secondary support structures located on both sides of the main support frame structure; The main support frame structure includes a support frame supported on both sides of the pit wall, and the support frames are pushed and moved by a first pushing structure. The secondary support structure includes secondary support brackets that are slidably installed on the support frame; the secondary support brackets are pushed and propelled by a second pushing structure.

2. The anti-collapse device for excavation pit support during pipeline construction according to claim 1, characterized in that, The main support frame structure includes a first support frame and a second support frame arranged symmetrically on both sides. Short slide rails are fixedly connected to the top and bottom of both ends of the first support frame, and short slide rails are fixedly connected to the top and bottom of both ends of the second support frame. The inner end of the secondary support bracket rolls between short slide rails via an inner roller pulley structure.

3. The anti-collapse device for excavation pit support during pipeline construction according to claim 2, characterized in that, The secondary support frame includes a first movable support plate that is slidably installed on both sides of the first support frame and a second movable support plate that is slidably installed on both sides of the second support frame. The first movable support plate and the second movable support plate are fixedly connected with support plates that support the foundation pit wall.

4. The anti-collapse device for excavation pit support during pipeline construction according to claim 3, characterized in that, The roller structure includes inner rollers that are fixedly installed at the top and bottom positions of the first movable support plate and the second movable support plate, respectively; The short slide rail has a short rail groove with a limit inner roller.

5. The anti-collapse device for excavation pit support during pipeline construction according to claim 4, characterized in that, An outer track structure is provided between the outer ends of the first movable support plate and the second movable support plate.

6. The anti-collapse device for excavation pit support during pipeline construction according to claim 5, characterized in that, The outer track structure includes an outer long track arranged symmetrically at the top and bottom, and the outer ends of the first movable support plate and the second movable support plate are rolled between the outer long tracks by an outer rolling pulley structure. The outer roller pulley structure includes outer rollers that are fixedly installed at the top and bottom positions of the first movable support plate and the second movable support plate, and a track support rod is fixedly connected between the central parts of the outer long track. The outer track has a track groove with a limiting outer rolling pulley.

7. The anti-collapse device for excavation pit support during pipeline construction according to claim 2, characterized in that, The first pushing structure includes a pair of first hydraulic cylinders that push the first support frame and the second support frame away from each other; The first hydraulic cylinder pushes between the two short slide rails.

8. The anti-collapse device for excavation pit support during pipeline construction according to claim 2, characterized in that, The short slide rails are fixedly connected by a slide rail connecting beam; The piston rods at both ends of the first hydraulic cylinder are fixedly installed on the slide rail connecting beam.

9. The anti-collapse device for excavation pit support during pipeline construction according to claim 2, characterized in that, The second pushing structure includes a second hydraulic cylinder for pushing the first movable support plate and the second movable support plate away from each other, with the plunger rods at both ends of the second hydraulic cylinder fixedly mounted on the first movable support plate and the second movable support plate.

10. The anti-collapse device for excavation pit support during pipeline construction according to claim 2, characterized in that, Rollers are installed at the bottom of the first support frame and the second support frame, respectively.

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