CN116084443A - Construction method for building foundation on underground civil air defense hole - Google Patents

Abstract

The invention discloses a construction method of building foundations on underground civil air defense holes, which comprises the following steps: s1, defining a civil air defense hole part affecting construction of a building foundation as a section to be treated, and determining the range of the section to be treated; s2, measuring a defense line on a section to be treated of the civil air defense hole in the engineering field, and determining the end head of the section to be treated of the civil air defense hole; s3, arranging blocking molds at two ends of a section to be treated of the civil air defense hole; s4, a solidified soil conveying channel is formed from the upper part and is communicated to the section to be treated of the civil air defense hole; s5, setting a solidified soil stirring field, and conveying solidified soil into a section to be treated of the civil air defense hole through an opened solidified soil conveying channel; s6, carrying out normal construction of the building foundation after the immobilization age reaches the set time. The method of the invention avoids large excavation, saves construction period and improves safety. Low cost and economical efficiency. The existing soil materials on site are utilized, so that the environment is protected, energy is saved, and emission is reduced. The solidified soil has better impermeability, and can improve the overall waterproof capability of the foundation.

Description

Construction method of building foundation on underground air defense tunnel

technical field

The invention relates to the technical field of building construction, in particular to a building foundation construction method on an underground air defense tunnel.

Background technique

Civil air defense caves are important places for sheltering personnel, storing materials, and protecting people's lives and property during wars, and are also an important material basis for implementing civil air defense. Civil air defense tunnels have played an important role in special times, but abandoned civil air defense tunnels have brought considerable construction difficulties to urban construction in today's era, especially for foundation construction. When the civil air defense tunnel is located within the buried depth of the foundation, the foundation construction must be carried out after the civil air defense tunnel is treated. The conventional construction treatment mainly adopts the open cut method. After the open cut method is excavated, a deep foundation pit will be formed. After a certain depth It is also necessary to support the excavated foundation pit to carry out the next step of construction, the cost is relatively large, the construction period is long, and the risk is relatively large.

Contents of the invention

The object of the present invention is to address the above deficiencies and provide a construction method for building foundations on underground civil air defense tunnels, which can solve the problems of large risk factor, long construction period and high cost of traditional open-cut excavation.

The technical scheme adopted in the present invention is:

A method for constructing a building foundation on an underground air defense tunnel, comprising the steps of:

S1. Define the part of the civil air defense tunnel that affects the construction of the building foundation as the section to be processed, and determine the scope of the section to be processed;

S2, measure the line of defense of the section to be processed of the civil air defense tunnel at the engineering site, and determine the end of the section to be processed of the civil air defense tunnel;

S3, form-stops are set at the two ends of the section to be processed in the air defense tunnel;

S4, set up the solidified soil conveying channel from the top, and the conveying channel is connected to the waiting section of the air defense tunnel;

S5, set the solidified soil mixing field, and transport the solidified soil to the waiting section of the air defense tunnel through the solidified soil conveying channel opened;

S6. After the immobilization age reaches the set time, proceed to the normal construction of the building foundation.

As a further optimization, in the step S1 of the present invention, the surveying map of the civil air defense tunnel and the surveying map of the building foundation are overlapped to determine the overlapping area of the surveying map of the civil defense tunnel and the surveying map of the building foundation, and the section to be processed of the civil defense tunnel The extent is slightly larger than the extent of the coincident region.

As a further optimization, in the step S2 of the present invention, at the actual project site, according to the overlapping area of the surveying drawing of the said determined civil air defense shelter and the surveying drawing of the building foundation, the large sections to be treated of the civil defense shelter are set out and measured, and the length of the civil defense shelter is determined. After the end, mark in the air defense hole.

As a further optimization, in step S3 of the present invention, the retaining form includes several I-beams that are sequentially connected in rows.

As a further optimization, in step S3 of the present invention, installation holes for installing I-beams are excavated at the top and bottom of the two ends of the air defense tunnel of the section to be treated, and the installation holes on one side are closely arranged and located at the top. The depth of the installation hole is greater than the difference between the I-beam and the hole height, the depth of the installation hole at the top is greater than the depth of the installation hole at the bottom, and when the installation is completed, the two ends of the I-beam are respectively located at the upper In the installation hole and the lower installation hole, the joints between adjacent I-beams are welded.

As a further optimization, in step S4 of the present invention, the solidified soil conveying channel is opened in the middle of the extending direction of the section to be treated of the air defense tunnel.

As a further optimization, the present invention sets a solidified soil mixing field at the construction site. The solidified soil mixing field is divided into a material storage area, an original soil transportation area, a mixing area and a solidified soil storage and transportation area, and the bottom of the mixing field adopts a set The thick concrete is hardened, the slope is found from the middle to the surrounding, and the drainage system is set.

As a further optimization, the stabilized soil of the present invention is prepared by mixing a soil stabilizer with native soil, and the content of the soil stabilizer is 12%.

As a further optimization, the primary soil of the present invention is directly collected near the construction site, and the solidified soil is in a mud state. When pouring the solidified soil, it should be poured in layers. The single-layer pouring height should not exceed 2m. The lower layer is poured after final setting.

As a further optimization, in step S5 of the present invention, the end of the solidified soil conveying pipe is provided with a diversion assembly, the diversion assembly includes an elbow and a guide groove, and the elbow is fixedly connected to the end for transporting the solidified soil , the guide groove is a half-pipe structure, the guide groove and the elbow are connected in rotation, and a spring is arranged between the guide groove and the elbow, when the spring is in a natural state, the length direction of the guide groove along the bend The output direction of the head.

The present invention has the following advantages:

1. Avoid large excavation, save construction period and improve safety.

The traditional treatment of civil air defense holes usually uses open excavation to expose the civil air defense holes before construction. Since the civil air defense holes are generally buried several meters underground, the excavation will form a deep and narrow foundation pit with a high height, which is less safe and The excavation and support construction period is long, time-consuming and labor-intensive. With this method, it is only necessary to backfill the solidified soil after the side forms are installed in the local openings, and the construction is quick and safe.

2. Low cost and economical.

Whether it is open excavation or plain concrete backfill, the corresponding construction machinery, labor and material costs are relatively high. This method is based on on-site materials, with low material costs, short construction period, and economical savings.

3. Utilize the existing soil materials on site, which is environmentally friendly, energy-saving and emission-reducing.

The backfilling material is mixed into solidified soil by on-site filling nearby, and there is no need to purchase commercial concrete, which reduces the consumption of building materials and the cost of earthwork transportation. It not only saves costs, but also is environmentally friendly and reduces carbon emissions. The environmental and economic benefits are a win-win situation.

4. The solidified soil has good impermeability, which can improve the overall waterproof ability of the foundation.

The solidified soil itself has good impermeability. After the foundation construction is completed, it can act as the water-retaining layer of the foundation, improve the waterproof ability of the foundation as a whole, and solve the common problem of water seepage in the basement in the later stage.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings used in the descriptions of the embodiments. Obviously, the drawings in the following descriptions are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Below in conjunction with accompanying drawing, the present invention is further described:

Fig. 1 is the sectional schematic diagram of geological structure to be processed;

Fig. 2 is the setting structure schematic diagram of retaining mold;

Fig. 3 is the schematic diagram of solidifying soil operation;

Fig. 4 is the schematic diagram after finishing building foundation construction;

Fig. 5 is a structural schematic diagram of a diversion assembly;

Figure 6 is a schematic top view of the construction site.

Among them: 1. Original stratum, 2. Civil air defense hole, 3. Building foundation, 4. Above-ground building, 5. Blocking formwork, 6. Solidified soil, 7. Solidified soil mixing field, 8. Solidified soil conveying pipe, 9. Elbow , 10, guide groove, 11, spring.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment, so that those skilled in the art can better understand the present invention and can implement it, but the embodiment given is not as the limitation of the present invention, in the case of no conflict Next, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

It should be understood that in the description of the embodiments of the present invention, words such as "first" and "second" are only used to distinguish the purpose of description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or imply order. "Multiple" in the embodiments of the present invention refers to two or more.

The term "and/or" in the embodiment of the present invention is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B, which can mean: A exists alone, B exists alone, There are three situations A and B at the same time. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

As shown in Fig. 1 and Fig. 6, it is the schematic cross-sectional view of the original stratum 1, as shown in the figure, the building foundation that wants to build is positioned at the top of the air defense tunnel 2, and the above ground building 4 is pre-built on the building foundation 3, the present embodiment A construction method for building foundations on underground air defense tunnels is provided, taking into account both economic and safety factors, specifically including the following steps:

S1, define the part of the air defense tunnel 2 that affects the construction of the building foundation 3 as the section to be processed, and determine the scope of the section to be processed;

The specific implementation process of this step is: the surveying drawing of civil air defense tunnel 2 and the surveying drawing of building foundation 3 are overlapped, and the overlapping area of the surveying drawing of civil defense tunnel 2 and the surveying drawing of building foundation 3 is determined, as shown in Figure 6, so The scope of the section to be treated of the man defense hole 2 is slightly larger than the scope of the overlapping area.

S2, at the construction site, the section to be processed of the civil air defense tunnel 2 is measured and set out to determine the end of the section to be processed of the civil air defense tunnel 2;

In this step, at the actual project site, according to the overlapping area of the survey drawing of the civil air defense tunnel 2 determined and the survey drawing of the building foundation 3, the section to be processed of the civil defense tunnel is set out and measured, and two ends of the civil defense tunnel 2 are determined Then mark in the air defense hole.

S3, mold stopper 5 is set at the two ends of the section to be treated in air defense hole 2, as shown in Figure 2;

In this step, the retaining form 5 includes a number of I-beams that are sequentially connected in rows. In the specific construction process: the top and bottom of the two ends of the civil air defense hole 2 of the section to be treated are excavated for installation. The installation holes of I-beam, the installation holes on one side are closely arranged, the depth of the installation hole at the top is greater than the difference between the I-beam and the hole height, and the depth of the installation hole at the top is greater than the depth of the installation hole at the bottom , that is, when installing the I-beam, now extend the upper end of the I-beam into the installation hole at the top until the I-beam is changed from the inclined state to the standing state and is enough to extend into the installation hole at the bottom , extend the lower end of the I-beam into the installation hole at the bottom. After the installation is completed, the two ends of the I-beam are respectively located in the upper installation hole and the lower installation hole, and the adjacent I-beam Weld the joints between them, and fill the empty space of the installation hole with concrete after the installation is completed.

S4. Open a solidified soil conveying channel from the top, and the solidified soil conveying channel is connected to the waiting section of the air defense tunnel;

In this step, the solidified soil conveying channel is opened in the middle of the section to be treated, and the solidified soil 6 is allowed to flow naturally into other positions of the section to be treated during the subsequent transportation of the solidified soil 6 .

S5, the solidified soil mixing field 7 is set, and the solidified soil is transported to the section to be treated in the air defense tunnel by the solidified soil conveying channel opened, as shown in Figure 3;

In this step, a solidified soil mixing field 7 is set at the construction site, and the solidified soil mixing field is divided into a material storage area, an original soil conveying area, a mixing area and a solidified soil storage and conveying area, and the bottom of the stirring field adopts a set thickness The concrete is hardened, the slope is found from the middle to the surrounding, and the drainage system is set up. The stabilized soil 6 is prepared by mixing the soil stabilizer with native soil, and the content of the soil stabilizer is 12%. The native soil is directly collected near the construction site, and the solidified soil 6 is in a mud state. When pouring the solidified soil, it should be poured in layers. The height of the single layer pouring should not exceed 2m. When the upper layer is poured, it should be poured after the final setting of the lower layer. .

As shown in Figure 5, the end of the solidified soil delivery pipe 8 is provided with a guide assembly, the guide assembly includes an elbow 9 and a guide groove 10, and the elbow 9 is fixedly connected to the end of the solidified soil delivery pipe 8, The guide groove 10 is a half-pipe structure, and the guide groove 10 is connected to the elbow 9 in rotation, and a spring 11 is arranged between the guide groove 10 and the elbow 9. When the spring 11 is in a natural state, the guide groove 10 is in a natural state. The length direction of the groove 10 is along the discharge direction of the elbow. The setting of the flow guide assembly is mainly to avoid vertical conveying. Due to the action of its own gravity and conveying pressure, it has high kinetic energy. When it reaches the pouring surface, it will A certain segregation phenomenon occurs, and the occurrence of this phenomenon can be reduced by setting the diversion component, but the direct installation of the elbow will affect its passing through the solidified soil conveying channel. In this scheme, as long as the elbow 9 can pass through the solidified soil conveying channel. .

S6. After the immobilization age reaches the set time, carry out the normal construction of the building foundation. The construction effect is shown in Figure 4.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (10)

1. A construction method of building foundation on underground civil air defense hole is characterized in that: the method comprises the following steps:

s1, defining a civil air defense hole part affecting construction of a building foundation as a section to be treated, and determining the range of the section to be treated;

s2, measuring a defense line on a section to be treated of the civil air defense hole in the engineering field, and determining the end head of the section to be treated of the civil air defense hole;

s3, arranging blocking molds at two ends of a section to be treated of the civil air defense hole;

s4, a solidified soil conveying channel is formed from the upper part and is communicated to the section to be treated of the civil air defense hole;

s5, setting a solidified soil stirring field, and conveying solidified soil into a section to be treated of the civil air defense hole through an opened solidified soil conveying channel;

s6, carrying out normal construction of the building foundation after the immobilization age reaches the set time.

2. The method for constructing the building foundation on the underground civil air defense hole according to claim 1, wherein the method comprises the following steps: in step S1, overlapping the map of the civil air defense hole with the map of the building foundation, and determining an overlapping area of the map of the civil air defense hole and the map of the building foundation, wherein the range of the section to be processed of the civil air defense hole is slightly larger than the range of the overlapping area.

3. The method for constructing the building foundation on the underground civil air defense hole according to claim 2, wherein the method comprises the following steps: in step S2, paying-off measurement is carried out on the large to-be-processed section of the civil air defense hole according to the superposition area of the determined mapping of the civil air defense hole and the mapping of the building foundation at the actual engineering site, and marking is carried out in the civil air defense hole after the end of the civil air defense hole is determined.

4. A method of constructing a building foundation over an underground civil air defense opening as defined in claim 3 wherein: in step S3, the blocking mold includes a plurality of i-beams connected in sequence in a row.

5. The method for constructing the building foundation on the underground civil air defense hole according to claim 4, wherein: in the step S3, the top and the bottom of the two end heads of the civil air defense hole of the section to be treated are respectively provided with mounting holes for mounting the I-steel, the mounting holes on one side are closely arranged, the depth of the mounting hole on the top is larger than the difference between the I-steel and the hole height, the depth of the mounting hole on the top is larger than the depth of the mounting hole on the bottom, and after the mounting is completed, the two ends of the I-steel are respectively positioned in the mounting hole on the upper part and the mounting hole on the lower part, and the joints between the adjacent I-steels are welded.

6. The method for constructing the building foundation on the underground civil air defense hole according to claim 1, wherein the method comprises the following steps: in step S4, the solidified soil conveying channel is opened at a middle position of the extending direction of the section to be treated of the civil air defense hole.

7. The method for constructing the building foundation on the underground civil air defense hole according to claim 1, wherein the method comprises the following steps: setting a solidified soil stirring field on a construction site, wherein the solidified soil stirring field is divided into a material storage area, a raw soil conveying area, a mixing area and a solidified soil storage and conveying area, the bottom of the stirring field is hardened by adopting concrete with set thickness, a slope is found from the middle to the periphery, and a drainage system is arranged.

8. The method for constructing the building foundation on the underground civil air defense hole according to claim 7, wherein: the solidified soil is prepared by mixing a soil solidifying agent and raw soil, and the content of the soil solidifying agent is 12%.

9. The method for constructing the building foundation on the underground civil air defense hole according to claim 8, wherein: the raw soil is directly collected near a construction site, the prepared solidified soil is in a slurry state, the solidified soil is poured in layers when poured, the single-layer pouring height is not more than 2m, and the upper layer pouring is performed after the lower layer pouring is finally solidified.

10. The method for constructing the building foundation on the underground civil air defense hole according to claim 6, wherein: in step S5, the end of solidification soil conveyer pipe is provided with the water conservancy diversion subassembly, the water conservancy diversion subassembly includes elbow and guide slot, elbow fixed connection is being used for carrying solidification soil' S tip, the guide slot is half-tube structure, rotate between guide slot and the elbow and be connected, and be provided with the spring between guide slot and the elbow, when the spring is in natural state, the length direction of guide slot is along the ejection of compact direction of elbow.

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