CN115198797B - Underground communication channel construction method combining three-side surrounding pipe curtain method and open cut - Google Patents
Underground communication channel construction method combining three-side surrounding pipe curtain method and open cut Download PDFInfo
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- CN115198797B CN115198797B CN202210775057.3A CN202210775057A CN115198797B CN 115198797 B CN115198797 B CN 115198797B CN 202210775057 A CN202210775057 A CN 202210775057A CN 115198797 B CN115198797 B CN 115198797B
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- 238000004891 communication Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 239000002689 soil Substances 0.000 claims abstract description 22
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000000670 limiting effect Effects 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The application relates to the technical field of underground engineering, in particular to an underground communication channel construction method combining a three-side surrounding pipe curtain method and open excavation, which comprises the following steps of digging out covering soil at and above an original independent foundation at the bottom of a protection building; pouring a foundation slab connected with the independent foundation, and reserving a hole in the foundation slab; digging a working well outside the protection building to put pipe curtain jacking equipment in the working well, jacking the pipe curtain, and enabling the upper parts of two sides of the pipe curtain to be close to a foundation slab; excavating earth in the surrounding area of the pipe curtain and the foundation base plate and installing an inner support; building a pipe curtain section connecting channel and removing the inner support, wherein the pipe curtain section connecting channel is communicated with the hole of the foundation slab; an open cut section connecting channel is built between the pipe curtain section connecting channel and the basement of the existing building, and the pipe curtain section connecting channel has the effect of protecting the building from being communicated with the pipe curtain section connecting channel and also can facilitate construction of the top plate of the pipe curtain section connecting channel.
Description
Technical Field
The application relates to the technical field of underground engineering, in particular to an underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut.
Background
The underground connecting channel is an engineering structure which is built in a soil layer below the ground and is used for connecting two building basements, and when the underground connecting channel is constructed, the underground connecting channel to be constructed can penetrate through other important soil layers below the protection building, if the thickness of the earthing soil layer below the protection building is thinner, the stability of the protection building can be greatly influenced when the underground soil layer is excavated.
When the construction of the underground continuous channel penetrating through the upper-layer protection building is carried out, a pipe curtain method is often used, namely, working wells are excavated at two sides of the protection building, pipe curtain jacking equipment is placed in the working wells, a plurality of steel pipes are jacked into a soil layer below the protection building by the pipe curtain jacking equipment, a rectangular pipe curtain is formed, and then supports are arranged in the pipe curtain to cast the underground continuous channel.
For the related art in the above, there are the following drawbacks: the rectangular pipe curtain formed by the pipe curtain method can separate the constructed underground continuous channel from the protective building, so that the protective building cannot use the underground continuous channel constructed by the pipe curtain method, and the roof construction of the underground continuous channel constructed by the pipe curtain method is inconvenient.
Disclosure of Invention
In order to ensure that the underground connecting channel can be used for protecting the building and the top plate of the underground connecting channel can be conveniently constructed, the application provides the underground connecting channel construction method combining the three-side surrounding pipe curtain method and the open cut.
The application provides an underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut, which adopts the following technical scheme.
The underground communication channel construction method combining the three-side surrounding pipe curtain method and the open cut specifically comprises the following steps.
Step 1, digging out the covering soil above the original independent foundation part at the bottom of the protection building;
step 2, pouring a foundation slab connected with the independent foundation, and reserving a hole in the foundation slab;
step 3, protecting the outside of the building, excavating a working well to put pipe curtain jacking equipment in the working well, jacking the pipe curtain, and enabling the upper parts of the two sides of the pipe curtain to be close to a foundation slab;
step 4, excavating earth in the surrounding area of the pipe curtain and the foundation base plate and installing an inner support;
step 5, building a pipe curtain section connecting channel and synchronously dismantling the inner support, wherein the pipe curtain section connecting channel is communicated with the hole of the foundation slab;
and 6, constructing an open cut section connecting channel between the pipe curtain section connecting channel and the basement of the existing building.
Through adopting above-mentioned technical scheme for form the region of building pipe curtain section intercommunication passageway between pipe curtain and the foundation slab, need not use traditional region that all comprises the pipe curtain to carry out the construction of pipe curtain section intercommunication passageway, make the protection building can be linked together through hole and pipe curtain section intercommunication reserved on the foundation slab, when pouring to the roof of pipe curtain section intercommunication passageway simultaneously, can follow the reserved hole on the foundation slab and carry out abundant vibrating to the concrete of the roof of pipe curtain section intercommunication passageway, compare in the construction of pipe curtain section intercommunication passageway that carries out in traditional comprehensive pipe curtain, the quality of pipe curtain section intercommunication passageway can obtain promoting.
Optionally, the pipe curtain limiting part is pre-embedded before the foundation mat is poured in step 2, the pipe curtain limiting part is tightly connected with the upper parts of two sides of the pipe curtain, and the pipe curtain close to the pipe curtain limiting part is jacked in step 3 and then jacked in a mode that the pipe curtain is far away from the pipe curtain limiting part.
Through adopting above-mentioned technical scheme for the pipe curtain jacking can be followed the setting direction of pipe curtain locating part and stablized the jacking, makes the pipe curtain jacking in-process be difficult for appearing the skew condition, and also be difficult for appearing the infiltration between pipe curtain and the foundation slab, so that follow-up pipe curtain section links the shaping of passageway, in addition with pipe curtain segmentation jacking, so that the whole direction of control pipe curtain is difficult for appearing great deviation.
Optionally, in the step 6, before the open cut section connecting channel is connected with the basement of the existing building, a predetermined position where the basement of the existing building is connected with the open cut section connecting channel is reinforced.
By adopting the technical scheme, the open cut section communicating channel is provided with a channel communicated with the existing building basement, the structural damage to the established position of the existing building basement is easy to occur, and the relevant position of the existing building basement and the whole can be better stable by reinforcing.
Optionally, the position department that the basement of existing building linked in open cut section links passageway is equipped with the reinforcement steel column, and the reinforcement steel column upper end is equipped with the reinforcement girder steel of butt in the roof beam of existing building basement.
By adopting the technical scheme, the reinforced steel beam is abutted to the upper beam of the basement of the existing building, which is close to the communication channel of the open cut section, so that the upper top plate and related structures of the basement of the existing building can obtain better stability.
Optionally, the open cut section communication channel is communicated with an opening of one end of the existing building basement and is provided with an opening steel beam which is abutted to the upper part of the side wall of the existing building basement.
Through adopting above-mentioned technical scheme for open cut section intercommunication way intercommunication can receive the support of entrance to a cave girder steel in the passway upper portion of existing building basement, makes before the open cut section intercommunication way intensity that corresponds still does not reach standard, and the entrance to a cave that corresponds is difficult for collapsing, also makes the basement of existing building offer the wall body that corresponds the entrance to a cave can keep better stability.
Optionally, a waterproof curtain is arranged in the soil layer around the protection building, around the preset position of the working well and around the open cut section communication channel before the earthwork excavation is carried out in the step 1.
By adopting the technical scheme, more groundwater is not easy to infiltrate into corresponding construction areas when the corresponding underground construction of the whole underground connecting channel is carried out.
Optionally, the depth of the waterproof curtain arranged around the working well is larger than that of the waterproof curtain arranged around the protection building, and the pipe curtain jacking equipment takes the waterproof curtain around the working well as a counterforce wall to conduct jacking operation of the pipe curtain.
Through adopting above-mentioned technical scheme, utilize the waterproof curtain to carry out the jacking work of pipe curtain, no longer need additionally pour counter-force wall or provide other counter-force points to pipe jacking equipment, the waterproof curtain degree of depth around the working well corresponds deepening simultaneously for the waterproof curtain that corresponds is difficult for appearing the condition of slope when pipe curtain jacking equipment works.
Optionally, before the pipe curtain starts to be jacked, the waterproof curtain close to the pipe curtain jacking equipment is firstly partially crushed for the pipe curtain to pass through, and the waterproof curtain around the building is protected to be a low-strength cement soil mixing pile so that the pipe curtain can be crushed in the jacking process of the waterproof curtain far away from the pipe curtain jacking equipment.
By adopting the technical scheme, the pipe curtain is firstly jacked into the soil layer below the foundation mat, and the pipe curtain can smoothly crush the waterproof curtain arranged around the corresponding protection building when the pipe curtain is jacked.
Optionally, after the foundation slab in the step 2 finishes pouring, pile foundations extending into the soil layer below the foundation slab are arranged in the foundation slab.
Through adopting above-mentioned technical scheme for whole foundation bedplate, the original independent basis of protection building, pile foundation three form the deep foundation of protection building, make the protection building keep stable that can be better in the corresponding construction process of pipe curtain section even passageway.
Optionally, reserve the hole that supplies the pile foundation to impress on the foundation base plate, every pile foundation comprises several precast pile, utilizes the foundation base plate as reaction frame when the pile foundation is impressed.
Through adopting above-mentioned technical scheme, utilize the foundation plate to carry out the impressing of corresponding pile foundation, reduce the damage to the inside of protection building as far as possible.
In summary, the present application includes at least one of the following beneficial effects:
1. the protection building can be communicated with the pipe curtain section communication channel through the reserved holes on the foundation base plate, and meanwhile, when the top plate of the pipe curtain section communication channel is poured, concrete on the top plate of the pipe curtain section communication channel can be fully vibrated from the reserved holes on the foundation base plate, and compared with the traditional construction of the pipe curtain section communication channel in a comprehensive pipe curtain, the quality of the pipe curtain section communication channel can be improved;
2. the settlement influence on the protection building during pipe curtain jacking construction and internal earth excavation is reduced, and the safety of the protection building during construction is improved.
Drawings
FIG. 1 is a schematic view of a cross-sectional main body structure of the entire underground communication passage of the present application;
FIG. 2 is a schematic view showing a horizontal plan view of the waterproof curtain of the present application;
FIG. 3 is a schematic view of the bottom structure of the dust removal block facing the bottom surface of the paperboard;
FIG. 4 is a schematic cross-sectional view of a pipe screen jacking apparatus being placed into a work well;
FIG. 5 is an enlarged view at A in FIG. 4;
FIG. 6 is a schematic structural view of reinforcement at an opening where an existing building basement and open cut section communication channels communicate.
Reference numerals illustrate: 1. the building is protected; 2. an independent foundation; 3. a base plate; 31. pile foundation; 32. a pipe curtain jacking device; 33. an inner support; 34. open cut sections; 4. a working well; 41. a pipe curtain; 42. reinforcing a steel column; 43. the pipe curtain section is connected with the channel; 44. existing buildings; 45. the open cut section is connected with the channel; 46. a pipe curtain limiting piece; 47. reinforcing the steel beam; 48. a tunnel portal steel girder; 49. a waterproof curtain.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings.
The embodiment of the application discloses a construction method of an underground communication channel by combining a three-side surrounding pipe curtain method with open excavation, which specifically comprises the following steps with reference to fig. 1 and 2.
And 1, checking the outline of the protection building 1 with the upper part traversed, and reinforcing the protection building 1 according to the outline of the protection building 1.
Step 2, construction measurement and paying-off of the pipe curtain 41 are performed to determine the construction areas of the pipe curtain 41, the working well 4 and the open cut section 34.
And 3, setting a waterproof curtain 49 in the soil layer around the protective building 1, around the preset position of the working well 4 and around the open cut section communication channel 45, and dewatering until the groundwater level is lower than the bottom height of the waterproof curtain 49.
And 4, digging out the covering soil at and above the original independent foundation 2 at the bottom of the protection building 1.
And 5, pouring a foundation slab 3 connected with the independent foundation 2, and reserving a plurality of holes on the foundation slab 3, wherein a part of holes are used for setting pile foundations 31.
Step 6, setting up in the working well 4 and being steel construction and can carry out the pipe curtain work platform of altitude mixture control, pipe curtain work platform can be cut fork lift platform, protect 1 outside excavation working well 4 in order to hang pipe curtain jacking equipment 32 into the working well 4 and place on pipe curtain work platform, will protect around the building 1 and be close to pipe curtain jacking equipment 32 waterproof curtain 49 carries out the partial breakage first, for pipe curtain 41 to pass smoothly, then jack-in pipe curtain 41, pipe curtain 41 segmentation jack-in, pipe curtain 41 that is close to foundation slab 3 is jacked-in earlier, jack-in is kept away from pipe curtain 41 of foundation slab 3 again, pipe curtain 41 both sides upper portion and foundation slab 3 are close to mutually.
And 7, excavating the soil in the surrounding area of the pipe curtain 41 and the foundation slab 3 by a step excavation method, and installing an inner support 33 while excavating, wherein the inner support 33 can be a section steel support.
Step 8, building a pipe curtain section communication channel 43 from the ports of the pipe curtains 41 of the two working wells 4 to the middle of the pipe curtain 41, vibrating holes reserved on the foundation slab 3 in the pouring molding process of each part of pipe curtain section communication channel 43, gradually dismantling the inner support 33 along with continuous pouring molding of the pipe curtain section communication channel 43, and communicating the pipe curtain section communication channel 43 with the holes of the foundation slab 3 so as to allow personnel inside the protected building 1 to enter the pipe curtain section communication channel 43.
And 9, opening corresponding holes on the side walls of the basement of the existing building 44 in a static cutting mode, excavating the open cut section 34, and constructing an open cut section communicating channel 45 in the working well 4 and the open cut section 34 and communicating the open cut section communicating channel 43 with the basement of the existing building 44 so as to finish the construction of the whole underground communicating channel.
Referring to fig. 2 and 3, the working wells 4 are disposed one on each of opposite sides of the protective building 1, each working well 4 being located between the protective building 1 and the existing building 44. The depth of the waterproof curtain 49 around the protection building 1 is smaller than the depth of the waterproof curtain 49 at the side of the working well 4 away from the protection building 1, so that the pipe curtain jacking device 32 can jack the waterproof curtain 49 with a deeper depth into the pipe curtain 41 as a reaction wall when the pipe curtain 41 is jacked in step 6. Meanwhile, the waterproof curtain 49 around the building 1 can be selected from low-strength cement soil mixing piles, so that the corresponding waterproof curtain 49 can be broken easily when the pipe curtain 41 is ejected out to be ejected out from the soil layer below the foundation slab 3.
Referring to fig. 4 and 5, in step 5, the pipe curtain limiting members 46 are embedded in the reinforcement bar arrangement process inside the foundation slab 3, the pipe curtain 41 is in a three-side enclosing form, the horizontal section of the pipe curtain 41 is located below the vertical sections of the pipe curtain 41, the upper parts of the vertical sections of the pipe curtain 41 are tightly inserted into the pipe curtain limiting members 46 to form a closed lock catch, and a closed lock catch structure is also arranged between each steel pipe of the pipe curtain 41, so that groundwater is difficult to enter into an enclosing area between the pipe curtain 41 and the foundation slab 3.
Referring to fig. 4, in step 5, the pile foundations 31 may be precast piles, and the pile foundations 31 may be arranged in a row on both sides of the pipe curtain section communication channel 43, and each row of pile foundations 31 may be uniformly arranged along the length direction of the pipe curtain section communication channel 43. And a part of reserved holes on the foundation base plate 3 are used as pile holes for pressing in the pile foundation 31, and when the pile foundation 31 is pressed in, the foundation base plate 3 is used as a reaction frame so as to press the pile foundation 31 into a soil layer below the foundation base plate 3 in a segmented manner. In other embodiments of the present embodiment, the pile foundation 31 may be a bored pile, and the protection building 1 may be transported into a low-clearance pile machine to perform a hole forming operation of the pile foundation 31, and then the reinforcement cage is lifted into the corresponding hole in a segmented manner, and then the concrete is poured, so as to complete the setting of the pile foundation 31.
Referring to fig. 6, in step 9, before the side wall of the basement of the existing building 44 is provided with the hole to construct the open cut section communication channel 45, two reinforcing steel columns 42 are first arranged at the position of the basement of the existing building 44 close to the open cut section communication channel 45, the reinforcing steel columns 42 and the basement ground of the existing building 44 can be anchored, the upper ends of the two reinforcing steel columns 42 can be detachably connected with the same reinforcing steel beam 47 through bolts, and the upper surface of the reinforcing steel beam 47 is abutted against the beam on the top plate of the basement of the existing building 44, so that when the hole is excavated at the position corresponding to the basement of the existing building 44, the overall stability of the basement of the existing building 44 can be better ensured. After the basement of the existing building 44 is opened corresponding to the opening of the open cut connecting channel 45, an opening steel beam 48 for supporting the upper part of the side wall of the existing building 44 is arranged on the upper part of the corresponding opening, the opening steel beam 48 can be tightly connected with the corresponding opening by using cement bolts, and section steel supports can be arranged on the lower part of the opening steel beam 48 according to requirements. The portal steel beam 48 is buried in the open cut section communication channel 45. After the strength of the open cut section communication channel reaches the standard, the reinforced steel columns 42 and the reinforced steel beams 47 are removed.
The implementation principle of the underground continuous channel construction method combining the three-side surrounding pipe curtain method and the open cut in the embodiment of the application is as follows: the pouring of the foundation slab 3 makes the protection building 1 more stable and less prone to sedimentation when the soil layer under the protection building 1 is constructed. The pipe curtain section connecting channel 43 can be communicated with the inside of the protection building 1 through a reserved hole on the foundation base plate 3 so as to meet the subsequent requirements, and the top plate of the pipe curtain section connecting channel 43 is convenient to vibrate, so that the quality of the pipe curtain section connecting channel 43 is improved.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut is characterized by comprising the following steps of: the method specifically comprises the following steps:
step 1, digging out the covering soil at and above the original independent foundation (2) at the bottom of the protection building (1);
step 2, pouring a foundation slab (3) connected with the independent foundation (2), and reserving a hole in the foundation slab (3);
step 3, excavating a working well (4) outside the protection building (1) so as to put pipe curtain jacking equipment (32) in the working well (4), jacking a pipe curtain (41), and enabling the upper parts of two sides of the pipe curtain (41) to be close to a foundation slab (3);
step 4, excavating earth in the enclosing area of the pipe curtain (41) and the foundation slab (3) and installing an inner support (33);
step 5, constructing a pipe curtain section communicating channel (43) and synchronously dismantling the inner support (33), wherein the pipe curtain section communicating channel (43) is communicated with the hole of the foundation slab (3);
and 6, constructing an open cut section connecting channel (45) between the pipe curtain section connecting channel (43) and the basement of the existing building (44).
2. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 1, which is characterized in that: the pipe curtain limiting pieces (46) are pre-buried before the foundation mat (3) is poured in the step 2, the pipe curtain limiting pieces (46) are tightly connected with the upper parts of the two sides of the pipe curtain (41), the pipe curtain (41) close to the pipe curtain limiting pieces (46) is jacked in the step 3, and then the pipe curtain far away from the pipe curtain limiting pieces (46) is jacked in.
3. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 1, which is characterized in that: in the step 6, before the open cut segment connecting channel (45) is connected with the basement of the existing building (44), the preset position of the basement of the existing building (44) communicated with the open cut segment connecting channel (45) is reinforced.
4. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 3, wherein the method comprises the following steps: the basement of the existing building (44) is provided with a reinforced steel column (42) at the position communicated with the open cut section connecting channel (45), and the upper end of the reinforced steel column (42) is provided with a reinforced steel beam (47) which is abutted against the beam of the basement of the existing building (44).
5. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 3, wherein the method comprises the following steps: the open cut section communicating channel (45) is communicated with an opening of a basement of the existing building (44), and an opening steel beam (48) which is abutted to the upper part of the side wall of the basement of the existing building (44) is arranged in the opening.
6. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 1, which is characterized in that: and a waterproof curtain (49) is arranged in a soil layer around the protective building (1), around the preset position of the working well (4) and around the open cut section communicating channel (45) before the earthwork excavation is carried out in the step 1.
7. The method for constructing the underground communication channel by combining the three-side surrounding pipe curtain method and the open cut according to claim 6, which is characterized by comprising the following steps: the depth of the waterproof curtain (49) arranged around the working well (4) is larger than that of the waterproof curtain (49) arranged around the protection building (1), and the pipe curtain jacking equipment (32) jacks the pipe curtain (41) by taking the waterproof curtain (49) around the working well as a counterforce wall.
8. The method for constructing the underground communication channel by combining the three-side surrounding pipe curtain method and the open cut according to claim 7, which is characterized in that: before the pipe curtain (41) starts to be jacked, the waterproof curtain (49) close to the pipe curtain jacking equipment (32) is firstly partially crushed for the pipe curtain (41) to pass through, and the waterproof curtain (49) around the building (1) is protected to be a cement soil mixing pile with low strength, so that the pipe curtain (41) can crush the waterproof curtain (49) far away from the pipe curtain jacking equipment (32) in the jacking process.
9. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 1, which is characterized in that: after the foundation slab (3) in the step 2 is poured, pile foundations (31) extending into soil layers below the foundation slab (3) are arranged in the foundation slab (3).
10. The underground communication channel construction method combining a three-side surrounding pipe curtain method and open cut according to claim 9, wherein the method comprises the following steps: holes for pile foundations (31) to be pressed in are reserved in the foundation base plate (3), each pile foundation (31) is composed of a plurality of precast piles, and the foundation base plate (3) is used as a counterforce frame when the pile foundations (31) are pressed in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP2001220762A (en) * | 2000-02-08 | 2001-08-17 | Nishimatsu Constr Co Ltd | Pipe roof structure and pipe roof construction method |
| CN103696784A (en) * | 2014-01-03 | 2014-04-02 | 沈阳铁道勘察设计院有限公司 | Large-diameter long pipe curtain construction method for shallowly-buried large-span under-tunnel-passing architectural structure |
| CN104675403A (en) * | 2014-12-18 | 2015-06-03 | 上海建工集团股份有限公司 | Underground space construction method and supporting structure |
| CN105003270A (en) * | 2015-07-30 | 2015-10-28 | 中铁第四勘察设计院集团有限公司 | Underwater tunnel construction method suitable for ultra-shallow earthing conditions |
| CN109555155A (en) * | 2018-11-29 | 2019-04-02 | 上海市机械施工集团有限公司 | The construction method of construction underground structure under building |
| CN113914392A (en) * | 2021-10-13 | 2022-01-11 | 浙江高专建筑设计研究院有限公司 | Existing building transformation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001220762A (en) * | 2000-02-08 | 2001-08-17 | Nishimatsu Constr Co Ltd | Pipe roof structure and pipe roof construction method |
| CN103696784A (en) * | 2014-01-03 | 2014-04-02 | 沈阳铁道勘察设计院有限公司 | Large-diameter long pipe curtain construction method for shallowly-buried large-span under-tunnel-passing architectural structure |
| CN104675403A (en) * | 2014-12-18 | 2015-06-03 | 上海建工集团股份有限公司 | Underground space construction method and supporting structure |
| CN105003270A (en) * | 2015-07-30 | 2015-10-28 | 中铁第四勘察设计院集团有限公司 | Underwater tunnel construction method suitable for ultra-shallow earthing conditions |
| CN109555155A (en) * | 2018-11-29 | 2019-04-02 | 上海市机械施工集团有限公司 | The construction method of construction underground structure under building |
| CN113914392A (en) * | 2021-10-13 | 2022-01-11 | 浙江高专建筑设计研究院有限公司 | Existing building transformation method |
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