Pipe ditch protection device adjacent to foundation pit side and construction method thereof

Abstract

The invention provides a protection device for a pipe ditch adjacent to the edge of a foundation pit, which belongs to the technical field of building construction and comprises a protection mechanism, a supporting mechanism and a tensile mechanism, the protection mechanism is mounted above the pipe ditch and is spaced from the pipe ditch; the supporting mechanism is connected with the bottom of the protection mechanism and used for supporting the protection mechanism. The tensile mechanism is installed on one side of the protection mechanism, and the tensile capacity of the device is improved. Through the design of the protection mechanism and the supporting mechanism, a protection barrier is arranged on the periphery of the built pipe ditch, the load transmitted from the upper portion can be well borne, and the built pipe ditch is effectively prevented from being damaged; and meanwhile, the two sides of the supporting mechanism go deep into soil, and soil body side pressure generated during foundation pit construction can be effectively resisted.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a pipe trench protection device adjacent to a foundation pit and a construction method thereof. Background Art

[0002] With the development of urbanization, the development and utilization of underground space has been continuously increased, the foundation pit is getting deeper and deeper, and the buildings are getting more and more dense, so the new buildings have less and less floor space or are surrounded by other buildings, roads and pipelines, which brings difficulties to foundation pit construction and vehicle movement. With the continuous increase of buildings and the increasing number of underground pipelines, this situation will become more and more obvious.

[0003] At present, temporary protective measures or steel plates, concrete and other materials are used to protect pipelines and provide transportation for vehicles. These measures are no longer able to meet the needs of social development. Although such protective measures are low-cost, they are easy to damage pipelines, and the road surface is frequently repaired, which may even affect the lives of residents in a district in serious cases. Traditional protective measures can no longer meet the needs, so the protection of trenches near foundation pits and the transportation of vehicles crossing trenches in and out of the pits are a major problem that needs to be solved in the construction field. Summary of the invention

[0004] The invention provides a pipe trench protection device adjacent to a foundation pit, which is used to solve the defects of pipeline protection in the prior art and realize the protection of the pipe trench adjacent to the foundation pit and the transportation of vehicles entering and leaving the pit across the pipe trench.

[0005] The present invention provides a pipe trench protection device adjacent to a foundation pit, comprising: a protection mechanism, a support mechanism and a tensile resistance mechanism; the protection mechanism is installed above the pipe trench and is spaced apart from the pipe trench; the support mechanism is connected to the bottom of the protection mechanism and is used to support the protection mechanism; the tensile resistance mechanism is installed on one side of the protection mechanism to improve the tensile resistance of the device.

[0006] According to a protection device for a pipe trench adjacent to a foundation pit provided by the present invention, the protection mechanism includes a door-type protection plate, and the door-type protection plate is erected above the pipe trench with a space between the door-type protection plate and the pipe trench.

[0007] According to a pipe trench protection device adjacent to a foundation pit provided by the present invention, the support mechanism includes gate-type legs, and the gate-type legs are installed at the bottom of both sides of the gate-type protective plate to support the gate-type protective plate.

[0008] According to a protection device for a pipe trench adjacent to a foundation pit provided by the present invention, the protection mechanism further includes a cover plate, and the cover plate is installed above the door-type protection plate.

[0009] According to a protection device for a pipe trench adjacent to a foundation pit provided by the present invention, the protection mechanism further includes a protection pad, and the protection pad is installed on the outer surface of the pipe trench.

[0010] According to a pipe trench protection device adjacent to a foundation pit provided by the present invention, the tensile mechanism includes a hexagonal nut, a gasket, a tie rod and a steel plate, one end of the tie rod is fixed to the side of the door-type protective plate away from the foundation pit through the hexagonal nut and the gasket, and the steel plate is fixed to the other end of the tie rod.

[0011] The present invention also provides a construction method for a pipe trench protection device adjacent to a foundation pit, which is used to construct any of the above-mentioned pipe trench protection devices adjacent to a foundation pit, and includes the following steps: excavating miscellaneous fill soil and original soil near the pipe trench according to the design drawings; laying a protective pad to wrap the entire pipe trench and fixing the protective pad; laying the template of the portal protective plate and the template of the portal support leg, pouring concrete to form the portal protective plate and the portal support leg; making a cover plate; installing pull rods and steel plates; and laying backfill soil.

[0012] According to a construction method of a pipe trench protection device adjacent to a foundation pit provided by the present invention, excavating miscellaneous fill and original soil near the pipe trench according to design drawings includes: detecting the pipe trench, and reasonably designing a protection structure according to the distance between the pipe trench and the foundation pit edge and the maximum load of a transport vehicle; excavating miscellaneous fill and original soil to the elevation of the bottom of the pipe trench according to the actual position of the pipe trench, and excavating on both sides of the bottom of the pipe trench according to the size and shape of the portal legs.

[0013] According to a construction method of a pipe trench protection device adjacent to a foundation pit provided by the present invention, templates for portal protection plates and portal legs are laid, and concrete is poured to form portal protection plates and portal legs, including: installing portal leg templates and portal protection plate templates according to the excavated portal leg positions and preset dimensions, reserving a cover plate opening above the portal protection plate to be consistent with the built pipe trench inspection opening; fixing with tension screws and steel pipes, and using tension rods on the side away from the foundation pit; pouring concrete; and removing the templates after the concrete has solidified to form portal legs and portal protection plates.

[0014] According to a construction method for a pipe trench protection device adjacent to a foundation pit provided by the present invention, installing a tie rod and a steel plate includes: after removing the formwork and curing the concrete, reserving the tie rod on the side of the gate-type protective plate away from the foundation pit; fixing one end of the tie rod on the side of the gate-type protective plate away from the foundation pit with a hexagonal nut and a gasket; and installing a steel plate on the other end of the tie rod.

[0015] The pipe trench protection device adjacent to the foundation pit provided by the present invention sets a protective barrier on the periphery of the built pipe trench through the design of the protection mechanism and the support mechanism, which can well withstand the load transmitted from above and effectively avoid damage to the built pipe trench; at the same time, the two sides of the support mechanism are deeply embedded in the soil, which can effectively resist the side pressure of the soil generated during the foundation pit construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the pipe trench protection device adjacent to the foundation pit provided by the present invention; Figure 2 It is a schematic diagram of the construction of the pipe trench protection device adjacent to the foundation pit provided by the present invention; Figure 3 It is a schematic diagram of a built pipe trench diagram adjacent to a foundation pit provided by the present invention.

[0018] Reference numerals: 100. Protection mechanism; 110, door type protective plate; 120, cover plate; 130, protective pad; 200, support mechanism; 210, Portal outriggers; 300, tensile mechanism; 310, hexagonal nut; 320, gasket; 330, pull rod; 340, steel plate.

[0019] 10. Pipe trench has been built; 20. Backfill soil; 30. Concrete pavement; 40. Support piles. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on Figure 1 The orientation and position of the trench protection device adjacent to the foundation pit when normally placed are shown only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The present invention provides a protection device for a pipe trench adjacent to a foundation pit, see Figure 1 , including: a protection mechanism 100, a support mechanism 200 and a tensile mechanism 300; the protection mechanism 100 is installed above the trench and is arranged at intervals from the trench; the support mechanism 200 is connected to the bottom of the protection mechanism 100 and is used to support the protection mechanism 100; the tensile mechanism 300 is installed on one side of the protection mechanism 100 to improve the tensile resistance of the device.

[0025] Through the design of the protection mechanism 100 and the support mechanism 200, a protection barrier is set up on the periphery of the built trench 10, which can well withstand the load transmitted from above and effectively avoid damage to the built trench 10; at the same time, both sides of the support mechanism 200 are deep in the soil, which can effectively resist the side pressure of the soil generated during foundation pit construction.

[0026] In one embodiment, the protection mechanism 100 includes a door-type protection plate 110, which is erected above the pipe trench with a space between the door-type protection plate 110 and the pipe trench. The support mechanism 200 includes a door-type support leg 210, which is installed at the bottom of both sides of the door-type protection plate 110 to support the door-type protection plate 110. The protection mechanism 100 also includes a cover plate 120, which is installed above the door-type protection plate 110. The tension mechanism 300 includes a hexagonal nut 310, a gasket 320, a tie rod 330 and a steel plate 340, and one end of the tie rod 330 is fixed to the side of the door-type protection plate 110 away from the foundation pit through the hexagonal nut 310 and the gasket 320, and the steel plate 340 is fixed to the other end of the tie rod 330.

[0027] Exemplarily, the portal protective plate 110 is a protective plate made of concrete. There is a certain space between the portal protective plate 110 and the existing pipe trench 10. No filling is required inside, and the backfill soil 20 is compacted outside to surround and protect the existing pipe trench 10. The portal protective plate 110 replaces the existing pipe trench 10 to bear the original soil pressure and road surface load.

[0028] Exemplarily, two rows of tie rods 330 are provided on the side away from the foundation pit.

[0029] Exemplarily, the portal leg 210 is made of a sloped bottom plate of concrete, the upper middle portion of which is connected to the portal guard plate 110, and the legs on both sides are spread out obliquely, which can increase the contact area with the ground to better transfer the load while also fixing the portal guard plate 110 well to prevent the portal guard plate 110 from moving or excessively shifting due to soil inclination.

[0030] Exemplarily, the cover plate 120 is a concrete plate with an inspection opening reserved above the gate-type protective plate 110, which is consistent with the position of the inspection well opening of the existing trench 10 for later maintenance.

[0031] Exemplarily, the protective pad 130 is an extruded board, which is arranged on the surface of the built trench 10 as the last line of protection. When the door-type protective plate 110 moves or breaks, it can act as a buffer to avoid direct impact on the built trench 10 and cause damage.

[0032] Exemplarily, the hexagonal nut 310 and the gasket 320 are a set, which can be used in combination or independently, and are arranged on both sides of the vertical plate of the door-type protective plate 110 and on both sides of the steel plate 340 to fix the pull rod 330 and the steel plate 340 respectively.

[0033] Exemplarily, the tie rod 330 is arranged on the right side of the portal guard plate 110, that is, away from the side of the foundation pit, with a lateral spacing of 2m. The tie rod 330 can be used as a tension screw to fix the formwork when pouring the portal guard plate 110. At the same time, after the concrete of the portal guard plate 110 is fixed, the formwork is removed, the tie rod 330 can be retained, and a steel plate 340 is set at the end of the tie rod 330.

[0034] Exemplarily, the steel plate 340 is disposed at the end of the pull rod 330 to increase the contact area with the soil, enhance the tensile performance of the door-type protective plate 110, and effectively resist the possibility of the door-type protective plate 110 tilting and moving due to the side tilt of the soil.

[0035] For example, the concrete pavement 30 is formed by laying the backfill soil 20 after the protective structure is completed and compacting it layer by layer to a predetermined elevation, and then pouring concrete to form a complete pavement for vehicles entering and leaving the site.

[0036] The present invention provides a construction method for a pipe trench protection device adjacent to a foundation pit, which is used to construct any of the above-mentioned pipe trench protection devices adjacent to the foundation pit. Figure 2 , including the following steps: Step 1: Excavate miscellaneous fill and original soil near the trench according to the design drawings.

[0037] According to the geological survey drawings, the surrounding environment of the foundation pit is understood in advance, and special attention is paid to whether there is a trench, the size of the trench, the location of the trench, etc.; the actual location of underground structures such as trenches and pipelines is detected on site; the protective structure is reasonably designed according to the distance between the trench and the foundation pit edge and the maximum load of the transport vehicle to meet the on-site needs. According to the actual location of the trench, miscellaneous fill and original soil are excavated to the elevation of the bottom of the trench. The specific excavation depth is determined according to the size of the trench; and excavation is performed on both sides of the bottom of the trench according to the size and shape of the gantry legs 210.

[0038] Step 2: Lay the protection mat 130 to the entire trench to wrap and fix the protection mat 130.

[0039] After the miscellaneous fill and original soil are excavated to the predetermined elevation, the surface of the trench is cleaned. After cleaning, the protective mat 130 is laid to wrap the entire trench and fix the protective mat 130 to prevent it from falling off.

[0040] Step 3: Lay the formwork for the door-type protection plate 110 and the door-type support leg 210 , and pour concrete to form the door-type protection plate 110 and the door-type support leg 210 .

[0041] According to the position and preset size of the excavated portal leg 210, the portal leg 210 template and the portal protection plate 110 template are installed, and a cover plate 120 opening is reserved above the portal protection plate 110, which is consistent with the inspection opening of the built trench 10; a cover plate 120 opening is reserved above the portal protection plate 110, which is consistent with the inspection opening of the built trench 10 to facilitate the later inspection of the pipeline; it is fixed with tension screws and steel pipes (i.e., the traditional method), and a special tension rod 330 (lengthened) is used on the right side; after reinforcing the template to ensure no leakage and reserving the pouring opening, concrete pouring begins; after the concrete solidifies, the template is removed (the inner template does not need to be removed) to form the portal leg 210 and the portal protection plate 110.

[0042] Step 4: making the cover plate 120 .

[0043] After the door-type protective plate 110 is manufactured, a square cover plate 120 is reserved on the top; the cover plate 120 can be made of concrete or steel, and its size is consistent with the cover plate 120 and is 10 cm larger than the size of each side of the inspection well opening of the built trench 10; after the cover plate 120 is manufactured, it can be installed on each reserved cover plate 120.

[0044] Step 5: Install the tie rod 330 and the steel plate 340 .

[0045] After the formwork is removed and the concrete is cured, a special tie rod 330 is reserved on the right side of the door-type protective plate 110, which is away from the foundation pit. There are two rows of special tie rods with a horizontal spacing of 2m. The tie rods 330 are fixed to the vertical plate on the right side of the door-type protective plate 110 using hexagonal nuts 310 and washers 320; then the steel plate 340 is installed at the end and fixed with hexagonal nuts 310.

[0046] Step 6: Lay backfill soil 20.

[0047] After the cover plate 120, the tie rod 330, and the steel plate 340 are installed, the backfill soil 20 is laid and compacted layer by layer to a level 30 cm below the road surface.

[0048] Step 7: Construction of concrete pavement 30.

[0049] After the backfill soil is compacted for 20 minutes, the layout and positioning begin, the road slope is measured, formwork is set up on both sides of the road and internal reinforcement is installed. After completion, concrete is poured and covered with film. After solidification, it is maintained in time to ensure that the road surface is intact and free of cracks.

[0050] Step 8: Foundation pit construction.

[0051] After all the above steps are completed and a certain strength is reached, the construction of the foundation pit support piles 40 can be started. After the construction of the support piles 40 is completed, the earthwork is excavated, the support is set, and the bottom plate and the main structure are constructed until the foundation pit backfilling is completed.

[0052] In the above steps, the cover plate 120 can be made of precast concrete plate or steel plate 340, which can be determined according to needs; the protective pad 130 can be made of extruded plate or similar flexible material with buffering effect and aging resistance. During the construction of the door-type protective plate 110, the inner mold is not easy to remove and can be left there. The distance between each surface of the door-type protective plate 110 and the built trench 10 can be adjusted according to actual needs; for the concrete construction designed in the above steps, its strength must reach the specified strength before foundation pit construction can be carried out to prevent the soil from tilting during foundation pit construction and causing concrete cracking.

[0053] The present invention sets a protective barrier on the periphery of the built pipe trench 10 through the design of the door-type protective plate 110 and the door-type support leg 210, which can well withstand the load transmitted from above and effectively avoid damage to the built pipe trench 10; at the same time, the support legs on both sides of the door-type support leg 210 are deeply embedded in the soil, which can effectively resist the side pressure of the soil generated during foundation pit construction.

[0054] The design of the tie rod 330 and the steel plate 340 increases the contact area with the soil through the steel plate 340, so that the tie rod 330 can generate reverse pulling force when the soil undergoes lateral displacement, thereby ensuring that the door-type protective plate 110 is more stable and can better protect the built trench 10.

[0055] The design of the protective pad 130 is used as the last barrier to protect the existing pipe trench 10. It can play a good protective role when the soil tilts seriously or the road surface collapses during the foundation pit construction process. The design of the concrete pavement 30 effectively solves the problems of load transfer and dust environmental protection caused by vehicles entering and leaving the foundation pit stage, and can effectively withstand the actual maximum load on site, thereby avoiding damage to the existing pipe trench 10.

[0056] The overall design can protect the existing pipe trench 10 under various conditions such as the construction of support piles 40, excavation of foundation pit earthwork, and in-and-out transportation vehicles, thereby avoiding the problem of damage to the existing pipe trench 10 due to adjacent foundation pit construction and vehicle transportation, and effectively preventing the risk of deformation and damage of the existing pipe trench 10 caused by lateral displacement of the foundation pit construction soil. The protection effect is significant and has a high reference value.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe trench protection device adjacent to a foundation pit, characterized in that: include: Protective mechanism, supporting mechanism and tensile mechanism; The protection mechanism is installed above the pipe trench and is spaced apart from the pipe trench; The supporting mechanism is connected to the bottom of the protective mechanism and is used to support the protective mechanism; The anti-tensile mechanism is installed on one side of the protective mechanism to improve the anti-tensile capacity of the device.

2. The pipe trench protection device adjacent to the foundation pit according to claim 1 is characterized in that: The protection mechanism comprises a door-type protection plate, which is mounted above the pipe trench and has a space between the door-type protection plate and the pipe trench.

3. The protection device for the pipe trench adjacent to the foundation pit according to claim 2 is characterized in that: The supporting mechanism comprises door-type supporting legs, which are installed at the bottom of both sides of the door-type protective plate and are used to support the door-type protective plate.

4. The pipe trench protection device adjacent to the foundation pit according to claim 2 is characterized in that: The protection mechanism also includes a cover plate, which is installed above the door-type protection plate.

5. The pipe trench protection device adjacent to the foundation pit according to claim 4 is characterized in that: The protection mechanism also includes a protection pad, which is installed on the outer surface of the pipe trench.

6. The protection device for the pipe trench adjacent to the foundation pit according to claim 2 is characterized in that: The tensile mechanism includes a hexagonal nut, a gasket, a pull rod and a steel plate. One end of the pull rod is fixed to the side of the door-type protective plate away from the foundation pit through the hexagonal nut and the gasket, and the steel plate is fixed to the other end of the pull rod.

7. A method for constructing a pipe trench protection device adjacent to a foundation pit, characterized in that: The method for constructing a pipe trench protection device adjacent to a foundation pit according to any one of claims 1 to 6 comprises the following steps: Excavate miscellaneous fill and original soil near the trench according to the design drawings; Lay the protective mat to the entire trench and secure it; Lay the formwork for the portal guard plate and the portal leg, pour concrete, and form the portal guard plate and the portal leg; Make the cover; Install tie rods and steel plates; Lay backfill soil.

8. The construction method of the pipe trench protection device adjacent to the foundation pit according to claim 7 is characterized in that: Excavation of miscellaneous fill and original soil near the trench according to the design drawings includes: Detect the pipe trench and reasonably design the protection structure according to the distance between the pipe trench and the foundation pit edge and the maximum load of the transport vehicle; Excavate miscellaneous fill and original soil to the trench bottom elevation according to the actual position of the trench, and excavate on both sides of the trench bottom according to the size and shape of the portal legs.

9. The construction method of the pipe trench protection device adjacent to the foundation pit according to claim 7 is characterized in that: Laying the formwork for the portal guard plate and the portal leg formwork, pouring concrete, and forming the portal guard plate and the portal leg include: According to the excavated portal leg position and preset size, install the portal leg template and portal protection plate template, and reserve a cover plate opening above the portal protection plate to keep it consistent with the existing trench inspection opening; Use tension screws and steel pipes for fixing, and use tension rods on the side away from the foundation pit; pouring concrete; After the concrete solidifies, the formwork is removed to form the portal legs and portal protective panels.

10. The construction method of the pipe trench protection device adjacent to the foundation pit according to claim 7, characterized in that: Installation of tie rods and steel plates includes: After removing the formwork and curing the concrete, reserve the tie rod on the side of the door-type protective plate away from the foundation pit; Use hexagonal nuts and washers to fix one end of the tie rod on the side of the door-type protective plate away from the foundation pit; A steel plate is installed at the other end of the pull rod.

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