Building-in-depth-free enclosure supporting structure for narrow-strip-shaped foundation pit of heat distribution pipeline

Abstract

The utility model provides a building-in depth-free enclosure supporting structure for a narrow-strip-shaped foundation pit of a heat distribution pipeline. The utility model relates to a steel corrugated plate connecting structure which is composed of standard knots, the standard knots are connected through an upper sleeve, a lower sleeve and a pin shaft in the vertical direction, the standard knots are connected in a lap joint mode in the groove direction, each standard knot comprises a steel corrugated plate, the steel corrugated plates on the two sides are connected through a telescopic supporting rod, angle steel and bolts, and a lead screw is additionally arranged in the middle of the telescopic supporting rod. The enclosure supporting structure disclosed by the utility model can well combine the characteristics of'narrow strip shape 'and'emphasizing timeliness' of the heat power pipeline foundation pit. The safety of the foundation pit in the construction period of the thermal pipeline foundation pit can be fully guaranteed, and accidents such as collapse and overturning of the foundation pit are completely eradicated; according to the supporting structure, steel sheet piles and reinforced concrete row pile supports which need the built-in depth and are complex in construction process of a traditional large foundation pit are abandoned, the construction process is simple, and a large amount of manpower and material resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support structures, in particular to a narrow strip foundation pit enclosure support structure for thermal pipelines with no embedding depth. Background Art

[0002] Traditionally, thermal foundation pit construction often adopts slope excavation due to its small excavation volume, narrow strip shape and short construction period. This has caused a series of foundation pit collapse and overturning accidents, bringing great risks to the construction affected area.

[0003] At present, the supports used in thermal foundation pit construction are all introduced from large-scale building foundation pits, such as wooden supports, steel sheet piles, reinforced concrete pile rows, underground continuous walls and soil nail walls. Such supports are heavy supports and require the cooperation of large-scale machinery during construction. The construction process is extremely cumbersome, the construction technology is complex and the construction period is relatively long. It is difficult to match well with thermal pipeline foundation pit construction, emergency repair and replacement projects.

[0004] The shortcomings of existing technologies include:

[0005] (1) When the heat pipe foundation pit does not use a support structure or uses wooden support, the construction risk is extremely high and safety accidents are prone to occur; (2) When the heat pipe foundation pit is constructed using steel sheet piles or reinforced concrete pile rows in large building foundation pits, the construction process is complex and the construction period is long, which makes it difficult to meet the timeliness requirements for emergency repairs and replacements of heat pipes, and the construction period is relatively long; (3) The existing support structure has a great impact on the surrounding environment of the construction; (4) The existing support structure is difficult to achieve modular and assembled construction, and it is difficult to accurately match the construction of different forms of narrow strip heat pipe foundation pits; (5) The existing structure is heavy and requires large construction machinery to cooperate with the construction; (6) The existing maintenance structure must be inserted into the soil, so professional equipment must be used to complete the construction. Utility Model Content

[0006] The embodiment of the utility model provides a narrow strip foundation pit enclosure support structure of a thermal pipeline with no embedding depth, so as to fully ensure the safety of the foundation pit during the construction of the thermal pipeline foundation pit.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0008] A narrow strip foundation pit retaining support structure for a thermal pipeline with no embedding depth is composed of standard sections. The standard sections are connected in the vertical direction by upper and lower sleeves and pins. The standard sections are connected along the groove direction by overlapping. The standard sections include steel corrugated plates. The steel corrugated plates on both sides are connected by retractable struts, angle steels and bolts. A screw is installed in the middle of the retractable struts.

[0009] Preferably, each telescopic support rod is equipped with two sets of lead screws near both sides of the steel corrugated plate, the steel corrugated plate and the angle steel are connected by bolts, and the angle steels on both sides are connected to the telescopic support rod by bolts.

[0010] Preferably, the lead screw is composed of nuts at both ends and a middle bolt. The nut ends on both sides are welded to the middle support rod. A through hole with a diameter of 40 mm is left in the middle of the bolt. When adjusting the length of the support rod, a crowbar or steel bar equipment is used to pass through the through hole and rotate the screw of the middle lead screw to achieve the approach and distance of the bolts at both ends.

[0011] Preferably, the telescopic support rod has a diameter of 70 mm and a thickness of 6 mm.

[0012] Preferably, the retaining support structure is placed in a narrow strip foundation pit of the thermal pipeline, and multiple retaining support structures are installed in the narrow strip foundation pit by multi-layer splicing.

[0013] As can be seen from the technical solutions provided by the above-mentioned embodiments of the present invention, the enclosure support structure of the present invention effectively combines the "narrow strip" and "time-sensitive" characteristics of the thermal pipeline foundation pit. This fully ensures the safety of the thermal pipeline foundation pit during construction, preventing accidents such as pit collapse and overturning. This support structure eliminates the traditional large-scale foundation pit support methods of steel sheet piles and reinforced concrete pile rows, which require deep embedment and complex construction processes. Its construction process is simple, saving considerable manpower and material resources.

[0014] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional structural diagram of a narrow strip foundation pit enclosure support structure for a thermal pipeline with no embedding depth provided by an embodiment of the utility model;

[0016] Figure 2 This is an elevation view of a narrow strip foundation pit enclosure support structure for a thermal pipeline with no embedding depth provided by an embodiment of the utility model;

[0017] Figure 3 A top view of a narrow strip foundation pit enclosure support structure for a thermal pipeline with no embedding depth provided by an embodiment of the utility model;

[0018] Figure 4 A schematic diagram of the sleeve and pin size markings provided by the utility model;

[0019] Figure 5 A schematic diagram of a lead screw structure provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0021] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or couplings. The term "and / or" used herein includes any unit and all combinations of one or more associated listed items.

[0022] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0023] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0024] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as such herein.

[0025] To facilitate understanding of the embodiments of the present invention, several specific embodiments will be further explained below with reference to the accompanying drawings, and each embodiment does not constitute a limitation on the embodiments of the present invention.

[0026] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0027] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0028] The three-dimensional structure of a narrow strip foundation pit without embedded depth of a heat pipe provided by the embodiment of the utility model is as follows Figure 1 As shown, the elevation diagram is as follows Figure 2 As shown, the top view is Figure 3 As shown. Figure 1 、 Figure 2 and Figure 3 In the diagram, 1 is a corrugated steel support plate, 5mm thick; 2 is a support rod, 70mm in diameter and 6mm thick; 3 is an angle steel, 110mm high and 70mm wide; 4 is the upper sleeve of the pin; 5 is the lower sleeve of the pin; 6 is a lead screw; 7 is the hole for anchoring the steel; 8 is an M20 bolt connecting the angle steel and the support rod; 9 is an M20 bolt connecting the corrugated plate and the angle steel; 10 is an inverted L-shaped pin, 210mm high and 50mm wide, made of solid steel with a diameter of 20mm. 11 is the nut for lead screw 6, with an outer diameter of 90mm; 12 is the bolt for lead screw 6, with a diameter of 30mm and a length of 300mm; 13 is the through hole for the bolt for lead screw 6, with a diameter of 40mm.

[0029] This utility model provides a narrow, non-embedded foundation pit retaining support structure for thermal pipelines. The standard sections consist of standard sections, each of which is connected vertically using upper and lower sleeves and pins, and along the grooves using overlapping connections. First, the corrugated steel sheets are bolted to the angle steels; then, the angle steels on both sides are bolted to the telescopic struts, thereby achieving a connection between the corrugated sheets on both sides.

[0030] Figure 4 This is a schematic diagram of the sleeve and pin size markings provided by the utility model. Figure 4 5 and 6 in the middle are the upper and lower sleeves of the pin shaft, with a height of 100mm, an inner diameter of 22mm, an outer diameter of 32mm, and a thickness of 10mm. Figure 4 The middle 10 is a pin shaft, which is in the shape of an "inverted L", with a height of 210mm and a width of 50mm, and is composed of a solid steel bar with a diameter of 20mm.

[0031] Figure 5 A schematic diagram of a screw structure provided by an embodiment of the utility model is shown in FIG. Figure 5 11 is the nut of the screw 6, with an outer diameter of 90mm; 12 is the bolt of the screw 6, with a diameter of 30mm and a length of 300mm; 13 is the through hole of the screw 6 bolt, with a diameter of 40mm. Figure 5 As shown, a leadscrew is installed in the middle of the strut to adjust its length. The leadscrew consists of nuts at both ends and a bolt in the middle. The nuts are welded to the middle strut, and a 40mm diameter through-hole is provided in the center of the bolt. To adjust the strut length, a crowbar, rebar, or other device is inserted through the through-hole and the screw in the middle leadscrew is rotated to move the bolts closer or further apart, thereby testing the length of the strut.

[0032] In the embodiment of the utility model, the retaining support structure of the narrow strip foundation pit of the thermal pipeline without embedding depth is placed in the narrow strip foundation pit of the thermal pipeline, and multiple retaining support structures are installed in the narrow strip foundation pit by multi-layer splicing.

[0033] Taking a narrow strip foundation pit with a height of 3.0m, a width of 3m and a length of 6m as an example, the narrow strip foundation pit of the thermal pipeline provided by the embodiment of the present invention has no embedded depth and its retaining support structure is composed of steel corrugated plates, angle steels and retractable struts on the left and right sides. There are a total of 8 steel corrugated plates on both sides, 16 struts and 6 angle steels. The steel corrugated plate structure on both sides is composed of standard units with a height of 1.5m and a length of 3m. The detailed dimensions of the standard unit of the steel corrugated plate are: 300*100mm wave shape, thickness 5mm. The steel corrugated plates are connected by sleeves and pins in the vertical direction, overlapped along the groove axis direction, and connected horizontally by retractable struts. Figure 3 This is a schematic diagram of the size markings of a sleeve and a pin provided by the utility model. The connection structure is composed of an upper sleeve, a lower sleeve and a pin, and a pin with a diameter of 20 mm is used.

[0034] The telescopic struts are 70mm in diameter and 6mm thick. Each strut is equipped with two sets of screws on either side of the corrugated steel plate to adjust the width of the support structure. The angle steel is bolted to the corrugated steel plate unit, and M20 bolts are used to connect the struts to the steel plate.

[0035] The lightweight retaining support structure for narrow thermal pipeline foundation pits with no embedded depth proposed in an embodiment of the present invention can be applied to the construction of narrow thermal pipeline foundation pits of different depths, lengths, and widths in urban thermal trench construction. Furthermore, after construction is completed, this support structure can be disassembled and recycled. Compared to steel sheet pile structures, this type of structure is lighter and can be constructed using only small machinery. Unlike traditional foundation pit support structures, this type of retaining support structure does not need to be inserted into the soil, saving many steps and allowing construction to be completed without the involvement of large machinery.

[0036] The construction process of the lightweight retaining support structure with no embedded depth for a narrow strip foundation pit of a thermal pipeline proposed in an embodiment of the present invention includes: the support structure is placed inside the foundation pit when the foundation pit is excavated to a depth of 0.5m, the first layer of support structure with a height of 1.5m is assembled, and a screw is used to adjust the distance between the steel corrugated plate support structures to ensure that the steel corrugated plate is in close contact with the soil behind it. Subsequently, the soil in the foundation pit is excavated manually or with small machinery, and the support structure gradually sinks as the depth of the foundation pit excavation increases. During the sinking process, the screw is adjusted so that the support structure is in close contact with the screw. When the foundation pit depth is 1.5m, the second layer of support structure with a height of 1.5m begins to be assembled; after the second layer of structure is assembled, the soil continues to be excavated, and the support structure sinks; and so on, until the foundation pit excavation construction is completed, and emergency repairs inside the thermal trench and pipeline installation are carried out.

[0037] After the internal construction of the thermal foundation pit is completed, the supporting structure is dismantled layer by layer starting from the bottom, and the soil is backfilled while being dismantled until the soil is completely filled.

[0038] Existing support structures for building foundation pits must be inserted into the soil to a certain depth to function, meaning they must be embedded in the soil. In contrast, the bottom of the structure proposed in this invention does not need to be inserted into the soil, meaning the support structure does not need to be embedded in the soil, meaning there is no embedding depth.

[0039] In summary, the light-weight retaining support structure for narrow strip foundation pits of thermal pipelines without embedding depth proposed in the present invention has the following characteristics: (1) modular assembly and modular support, which can be applied to narrow strip foundation pits of different widths, lengths and depths, and has a wide range of applications; (2) recyclable and reusable; (3) no need to embed in the soil, and the construction process is convenient; (4) the components are light, the construction is relatively simple, and no large-scale equipment is required; (5) no need to embed in the soil, and no large-scale professional equipment is required.

[0040] This new retaining support structure perfectly combines the narrow design and high timeliness requirements of thermal pipeline foundation pits. On the one hand, this support structure fully ensures the safety of the thermal foundation pit during construction, preventing accidents such as pit collapse and overturning. On the other hand, this support structure eliminates the deep embedding and complex construction techniques of traditional large-scale foundation pits using steel sheet piles and reinforced concrete pile rows. The proposed support structure offers a simple construction process, eliminating the need for large, specialized equipment and saving significant manpower and material resources.

[0041] Those skilled in the art will appreciate that the accompanying drawings are merely schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present invention.

[0042] Those skilled in the art will appreciate that the components of the apparatus described in the embodiments may be distributed throughout the apparatus described in the embodiments, or may be modified accordingly and located in one or more apparatuses different from the embodiments. The components of the above embodiments may be combined into a single component or further divided into multiple subcomponents.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A narrow strip foundation pit supporting structure for a thermal pipeline with no embedded depth, characterized in that: It is composed of standard sections, which are connected in the vertical direction by upper and lower sleeves and pins. The standard sections are connected along the groove direction by overlapping. The standard sections include steel corrugated plates, and the steel corrugated plates on both sides are connected by retractable struts, angle steels and bolts. A screw is installed in the middle of the retractable struts.

2. The enclosure support structure according to claim 1, characterized in that: Each telescopic support rod is equipped with two sets of lead screws near both sides of the steel corrugated plate. The steel corrugated plate and the angle steel are connected by bolts, and the angle steels on both sides are connected to the telescopic support rod by bolts.

3. The enclosure support structure according to claim 1, characterized in that: The lead screw consists of nuts at both ends and a bolt in the middle. The nut ends on both sides are welded to the middle support rod. A through hole with a diameter of 40 mm is left in the middle of the bolt. When adjusting the length of the support rod, a crowbar or steel bar equipment is used to pass through the through hole and rotate the screw of the middle lead screw to achieve the approach and distance between the bolts at both ends.

4. The enclosure support structure according to claim 1, characterized in that: The telescopic support rod is a support rod with a diameter of 70 mm and a thickness of 6 mm.

5. The enclosure support structure according to claim 1, characterized in that: The retaining support structure is placed in a narrow strip foundation pit of a thermal pipeline, and a plurality of retaining support structures are installed in the narrow strip foundation pit by multi-layer splicing.

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