CN113737857A - Be used for deep pipe gallery structure and major structure to build connection structure again and worker's method thereof - Google Patents
Be used for deep pipe gallery structure and major structure to build connection structure again and worker's method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 230000008719 thickening Effects 0.000 claims description 23
- 239000004567 concrete Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 6
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- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
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- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The utility model provides a be used for deep piping lane structure and major structure to build connection structure again and worker's method, including being located major structure foundation pit and deep piping lane foundation pit, be equipped with main part envelope in the soil body all around of major structure foundation pit, main part bottom plate structure breaks off at deep piping lane foundation pit within range, main part bottom plate structure is higher than piping lane envelope, the top of supporting in the piping lane is equipped with the first way of piping lane and supports, it has power transmission structure to add between the tip of the critical deep piping lane foundation pit of main part bottom plate structure and the top outside of the first way interior support of piping lane, main part bottom plate structure forms the power transmission system through the first way interior support of power transmission structure intercommunication piping lane. According to the invention, the force transmission component is arranged between the main structure bottom plate and the first horizontal support of the pipe gallery to form a transverse force transmission system, so that the main structure bottom plate structure in the main structure foundation pit separated by the deep foundation pit and the pipe gallery foundation pit is temporarily closed, the deep pipe gallery and the main structure can be constructed at the same time, the control period is effectively saved, and the construction cost can be reduced.
Description
Technical Field
The invention belongs to foundation pit engineering, and particularly relates to a construction structure for a deep pipe gallery structure and a main body structure and a construction method thereof.
Background
In recent years, with the acceleration of the construction process of infrastructure of China, the underground space of the building develops towards the complexity and diversification. The underground space development area is huge, the surrounding environment is relatively complex, the foundation pit engineering can be implemented in a partition mode when one-time forming excavation is not allowed, and the foundation pit of each partition is constructed step by step according to the design and construction period requirements. The construction is carried out simultaneously in a plurality of areas, and reasonable excavation, supporting, structure building and support dismantling of different areas are important guarantees for guaranteeing the safety and rapid construction of foundation pit groups.
Some main structure foundation ditch interior can exist because of the designing requirement indulge and wear, cross or the partial pipe gallery deep basal pit that passes, because pipe gallery deep basal pit does not possess the condition of doing the construction in the opposite directions, the whole of being in the same direction as doing the construction and will hindering the main structure bottom plate of pipe gallery deep basal pit is taken shape, can not form effectual support system, cause main structure must wait for the construction of pipe gallery completion back construction, this will prolong and influence the time limit for a project, and the effective back cover of main structure foundation pit can not form fast, be unfavorable for the safety of foundation ditch. Therefore, how to realize excavation and the main structure of piping lane deep basal pit and construct when building back, can shorten the project time limit for a project simultaneously is the problem that awaits the solution urgently.
Disclosure of Invention
The invention aims to provide a construction structure for building a deep pipe gallery structure and a main body structure back and a construction method thereof, which aim to solve the technical problems that the pipe gallery deep foundation pit exists in the main body structure foundation pit, the whole forming of a main body structure bottom plate is blocked by the smooth construction of the pipe gallery deep foundation pit, an effective supporting system cannot be formed, the main body structure needs to be constructed after the completion of the pipe gallery construction, and the construction period is prolonged; and the technical problems that the foundation pit with the main structure cannot form an effective back cover quickly and is not beneficial to the safety of the foundation pit are solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a connection structure for a deep pipe gallery structure and a main body structure in a return building comprises a main body structure foundation pit and a deep pipe gallery foundation pit which is positioned in the main body structure foundation pit and is arranged downwards from the pit bottom of the main body structure foundation pit, a main body enclosure structure is arranged in the soil body around the main body structure foundation pit, a pipe gallery enclosure structure is arranged in the soil body around the deep pipe gallery foundation pit,
be equipped with the major structure foundation structure who has been under construction in the major structure foundation ditch, the major structure foundation structure is by supreme major structure bed course and the major structure foundation plate of including having under construction, and the major structure foundation structure breaks off at deep piping lane foundation ditch within range, the major structure foundation structure is higher than piping lane envelope bearing, piping lane envelope bearing in the piping lane, the top of supporting in the piping lane is equipped with the first inner support of piping lane, add power transmission structure between the tip of the critical deep piping lane foundation ditch of major structure and the first top outside of inner support of piping lane, the major structure foundation structure forms the biography power system through the first inner support of power transmission structure intercommunication piping lane, the major structure foundation structure of the closed deep piping lane foundation ditch within range disconnection of biography power system.
The pipe gallery enclosure structure further comprises pipe gallery enclosure combined piles and pipe gallery top beams, the top of each pipe gallery enclosure combined pile is connected to the pipe gallery top beams to form a whole, the pipe gallery enclosure combined piles are combined by rotary excavating piles and rotary spraying piles, the rotary excavating piles are stressed piles, and the rotary spraying piles are located between the rotary excavating piles to form water stopping piles.
The both ends of the first way interior support of piping lane prop up between the piping lane hat beam of both sides to the first way interior support of piping lane is the same and the top surface parallel and level with the elevation of piping lane hat beam, main part bottom plate structure passes through the first way interior support of piping lane hat beam intercommunication piping lane and forms the biography power system.
The base level height of main part bottom plate bed course is higher than the top elevation of piping lane hat roof beam, load transfer structure is interim component, interim component includes for slant dowel steel, the slant dowel steel leads to the length setting respectively along the top both sides of dark piping lane foundation ditch, the outer terminal surface of slant dowel steel and the interior terminal surface fixed connection of main part bottom plate, the interior terminal surface of slant dowel steel and the outer terminal surface fixed connection of piping lane hat roof beam, the slant dowel steel is reinforced concrete structure, and the reinforcing bar both ends of slant dowel steel are all anchored with main part bottom plate reinforcing bar and piping lane hat roof beam reinforcing bar, and the concrete label of slant dowel steel is not less than main part bottom plate concrete's label, and the biography power route of biography power system is the first interior support of main part bottom plate, slant dowel steel, piping lane hat roof beam and piping lane hat roof beam.
Force transfer structure is permanent component, permanent component includes the main part bottom plate bed course of thickening downwards, the end elevation of main part bottom plate bed course is less than the top elevation of piping lane guan liang and makes two parts structure at the vertical overlapping thickness that has in edge of deep piping lane foundation ditch, the main part bottom plate bed course is including the body layer and the thickening layer from top to bottom, the thinnest thickness of thickening layer is accurate in order to realize supporting axial force's transmission, the main part bottom plate bed course is formed by plain concrete to cloth is equipped with anti reinforcing bar net of splitting in the thickening layer, the inboard of thickening layer is tight and is connected as an organic wholely through burying the connecting piece underground with the outside top of piping lane guanliang, and the biography power route of biography power system is main part bottom plate bed course, piping lane guanliang and the first way interior support of piping lane.
Force transfer structure is interim component, interim component includes a set of piping lane short column of addding along piping lane envelope's top, the top interval of piping lane short column along piping lane guan liang sets up and rather than fixed connection, one-to-one about piping lane short column and the piping lane enclosure combination pile, the vertical promotion setting in the first way of piping lane, the top elevation of piping lane short column, the first way of piping lane interior support and main body floor structure's top elevation parallel and level, the both ends difference fixed connection of the first way of piping lane interior support between the both sides piping lane short column, the outside of the tight piping lane short column in inboard top of main body floor structure, the biography power route of biography power system is the first way interior support of main body floor structure, piping lane short column and piping lane.
A construction method for a deep pipe gallery structure and a main body structure return building connection structure is characterized in that the main body structure is an underground structure and sequentially comprises a main body bottom plate structure, a negative first-floor structure and a main body top plate structure from bottom to top, the main body enclosure structure comprises a main body enclosure combined pile, a main body top beam and a main body inner support, the main body inner support sequentially comprises a main body first inner support, a main body second inner support and a main body third inner support from top to bottom, the deep pipe gallery structure comprises a deep pipe gallery bottom plate structure and a deep pipe gallery top plate structure, the pipe gallery inner support sequentially comprises a pipe gallery first inner support and a pipe gallery second inner support from top to bottom,
the construction steps are as follows:
constructing a main body enclosure combined pile and a main body crown beam from the ground surface according to design;
step two, excavating a main structure foundation pit in the main body enclosure structure, and constructing a main body first inner support, a main body second inner support and a main body third inner support layer by layer from top to bottom during downward excavation;
constructing a pipe gallery enclosure combined pile and a pipe gallery crown beam from the pit bottom of the main structure foundation pit and the deep pipe gallery structure range;
fourthly, excavating a deep pipe gallery foundation pit in the pipe gallery enclosure structure, and constructing a first inner support of the pipe gallery when excavating downwards;
constructing a main body bottom plate structure according to design, wherein the main body bottom plate structure is disconnected by the deep pipe gallery foundation pit at the position of the critical deep pipe gallery foundation pit;
constructing a force transmission structure between the main body bottom plate structure and the top of the first inner support of the pipe gallery according to design, completing a force transmission system path between the main body bottom plate structure and the first inner support of the pipe gallery, and closing the disconnected main body bottom plate structure in the deep pipe gallery foundation pit range;
seventhly, simultaneously performing downward construction of the deep pipe gallery structure and upward construction of the main body structure under the guarantee of the force transmission system;
wherein the construction sequence of major structure does: sequentially detaching a third support of the main body, constructing a negative first-floor structure, sequentially detaching a first inner support of the main body, constructing a top plate structure of the main body and tightly detaching a second support of the main body;
the construction sequence of deep pipe gallery structure does: continuously downwards excavating a second-channel inner support of the construction pipe gallery, constructing a bottom plate structure of the deep pipe gallery, dismantling the second-channel inner support of the pipe gallery and constructing a top plate structure of the deep pipe gallery;
step eight, dismantling a force transmission system: selecting whether to dismantle the force transmission structure and the first inner support of the pipe gallery according to requirements;
and step nine, closing the main body bottom plate structure.
The construction steps of the sixth step are as follows:
step a, specially designing and checking an oblique force transfer plate, wherein the checking of the bearing capacity of the oblique force transfer plate is included so as to ensure the arrangement interval, the section size and the stress balance of the oblique force transfer plate; the stress balance is the stress balance between the inclination angle of the oblique force transmission plate and the main body bottom plate;
and b, paving the steel bars in the oblique force transfer plate according to the design, anchoring the steel bars with the main body bottom plate steel bars and the pipe gallery crown beam steel bars, and pouring concrete of the oblique force transfer plate, so that the two ends of the oblique force transfer plate are respectively connected with the main body bottom plate and the pipe gallery crown beam.
Before excavating a main structure foundation pit, specially designing and checking a main bottom plate cushion layer, wherein the special designing and checking comprise the thickness design of a body layer and a thickening layer, and further comprise a connecting node between a pipe gallery crown beam and a pipe gallery enclosure combined pile and lateral stress on two sides of the pipe gallery crown beam; step two, when downward excavation is carried out, earthwork of the thickening layer needs to be excavated continuously;
the construction steps of the fifth step are as follows:
step a, constructing a main body bottom plate cushion layer, a body layer and a thickening layer integrally according to design, and laying an anti-crack reinforcing mesh during construction;
and step b, constructing a main body bottom plate on the upper side of the main body cushion layer.
The construction steps of the sixth step are as follows:
step a, specially designing and checking a pipe gallery short column, wherein the special design and checking comprises a connecting node of the pipe gallery short column and a pipe gallery crown beam, transmission of supporting force between a main body bottom plate structure and the pipe gallery short column and height design of the pipe gallery short column; also comprises checking the integral deformation, stress and stability of the pipe gallery enclosure structure,
b, continuously casting a reinforced concrete pipe gallery short column on the top of the original pipe gallery crown beam in situ, wherein the steel bars of the pipe gallery short column, the steel bars of the pipe gallery crown beam and the steel bars of the main body bottom plate structure are respectively anchored;
and c, correspondingly and fixedly connecting the two ends of the first inner support of the pipe gallery between the short columns of the pipe gallery.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
according to the invention, the force transmission component is arranged between the main structure bottom plate and the first horizontal support of the pipe gallery to form a transverse force transmission system, so that the main structure bottom plate structure in the main structure foundation pit separated by the deep foundation pit and the pipe gallery foundation pit is temporarily closed, the deep pipe gallery and the main structure can be constructed at the same time, the control period is effectively saved, and the construction cost can be reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic plan view of a subterranean structure of the present invention.
Fig. 2 is a schematic side view of a subterranean structure of the present invention.
Fig. 3 is a side view of a force transfer structure according to a first embodiment.
Fig. 4 is a partial force enlarged view of fig. 3.
Fig. 5 is a side view of a force transfer structure according to a first embodiment.
Fig. 6 is a partial force enlarged view of fig. 5.
Fig. 7 is a side view of a third embodiment of the force transfer structure.
Fig. 8 is a schematic top view of the structure of fig. 7.
Reference numerals: 1-main body structure foundation pit, 2-deep pipe gallery foundation pit, 3-main body enclosure structure, 31-main body enclosure combined pile, 32-main body crown beam, 33-main body first inner support, 34-main body second inner support, 35-main body third inner support, 4-pipe gallery enclosure structure, 41-pipe gallery first inner support, 42-pipe gallery enclosure combined pile, 421-rotary digging pile, 422-rotary spraying pile, 43-pipe gallery crown beam, 44-pipe gallery second inner support, 5-main body bottom plate cushion layer, 51-body layer, 52-thickening layer, 6-main body bottom plate, 7-force transmission structure, 71-oblique force transmission plate, 72-pipe gallery short column, 8-negative first floor structure, 9-main body top plate structure, 10-deep pipe gallery bottom plate structure and 11-deep pipe gallery top plate structure.
Detailed Description
Referring to fig. 1-2, a pipe gallery deep foundation pit is longitudinally arranged in a main structure foundation pit 1, and the elevation of the pipe gallery deep foundation pit is lower than that of the main structure foundation pit 1.
Treat that the major structure of being under construction is the underground structure, by supreme main part bottom plate structure, burden one deck floor structure 8 and the main part roof structure 9 of including in proper order down, deep-pipe gallery structure includes deep-pipe gallery bottom plate structure 10 and deep-pipe gallery roof structure 11.
The planned construction process is as follows according to the difference of relative degree of depth with main part envelope: the vertical enclosure of the main structure foundation pit 1, namely the main enclosure combined pile 31, the main body crown beam 32 and the horizontal support, is constructed firstly. Three horizontal supports are designed in the main structure foundation pit 1, and are respectively a main body first inner support 33, a main body second inner support 34 and a main body third inner support 35. After the main structure foundation pit 1 is excavated to the pit bottom, the vertical enclosures of the pipe gallery deep foundation pit are constructed, namely the pipe gallery enclosure combined pile 42, the pipe gallery crown beam 43 and the horizontal supports, two horizontal supports are designed in the pipe gallery deep foundation pit, and are respectively the first inner support 41 of the pipe gallery and the second inner support 44 of the pipe gallery, and the pit bottom is gradually excavated to the pipe gallery deep foundation pit. Then upwards along doing the deep piping lane structure to demolish twice horizontal brace in the deep piping lane foundation ditch in proper order, seal main part bottom plate structure afterwards.
The elevation of main part bottom plate structure is located the elevation top of the first interior support of piping lane, and both are not on same elevation. The first floor structure is located between the third inner support and the second inner support of the main body, and the top plate structure of the main body is located at the position of the first inner support of the main body. The main structure construction and the support change sequence are that firstly the main third-way inner support is dismantled in the same direction, the first-way inner support of the main body is dismantled in the same direction by the negative first-floor structure, then the main roof structure is constructed, and finally the main second-way inner support is dismantled in a stuffy mode.
By adopting the construction scheme, the main structure needs to be built again and can be started after the construction of the deep pipe gallery structure is completed, so that the construction period of the whole project is seriously delayed, and the time is about three months. If can be so that excavation deep piping lane foundation ditch and major structure back build can be under construction simultaneously, then can be fundamental shorten the construction progress.
In this scheme, the main part structure returns and builds the reason that can not implement with deep piping lane foundation ditch excavation is that deep piping lane foundation ditch vertically link up in main part structure foundation ditch 1, causes the bottom plate of main part structure at the horizontal disconnection in deep piping lane foundation ditch position, and main part bottom plate structure and the first interior support of piping lane can not form integrative effectual support system, can not support with main part third during the construction that makes progress promptly and form and tear open and trade the support system, and the main part third is said and is supported and can not demolish, and then leads to the negative floor structure can not implement. Therefore, the main body bottom plate structure can not transversely run through to form an effective force transmission system, and the main reason that the deep pipe gallery foundation pit excavation and the main body structure back construction can not be simultaneously implemented is caused. Meanwhile, the first horizontal support of the deep pipe gallery foundation pit and the bottom plate of the main body structure are not at the same elevation, so that additional measures or structures are needed to be adopted, and the bottom plate can transversely transfer force.
The first embodiment is shown in fig. 3-4, and a connection structure for a deep pipe gallery structure and a main body structure is built in a return mode, and comprises a main body structure foundation pit 1 and a deep pipe gallery foundation pit 2 which is located in the main body structure foundation pit 1 and is arranged downwards from the bottom of the main body structure foundation pit 1, a main body enclosure structure 3 is arranged in the soil body around the main body structure foundation pit 1, and a pipe gallery enclosure structure 4 is arranged in the soil body around the deep pipe gallery foundation pit 2.
Be equipped with the major structure foundation pit of having under construction in 1, the major structure foundation pit is by supreme major structure foundation pit bed course 5 and the major structure foundation pit 6 of having under construction, and the major structure foundation pit breaks off at deep piping lane foundation pit 2 within ranges, the major structure foundation pit is higher than piping lane envelope structure 4, piping lane envelope structure 4 includes the piping lane interior support, the piping lane interior support that the support includes piping lane envelope structure 4's top is equipped with 41, it passes force transmission structure 7 to add between the tip of the critical deep piping lane foundation pit of major structure and the top outside of the first interior 41 of piping lane, and the major structure foundation pit forms the biography power system through passing force transmission structure 7 intercommunication piping lane interior support 41, the major structure foundation pit of the closed deep piping lane foundation pit 2 within ranges disconnection of power system.
Piping lane envelope structure 4 still includes piping lane enclosure combination pile 42 and piping lane crown beam 43, the top that each piping lane enclosure combination pile 42 is connected to piping lane crown beam 43 forms integratively, the both ends of support 41 in the first way of piping lane prop up between the piping lane crown beam 43 of both sides to the elevation of support 41 in the first way of piping lane is the same and the top surface parallel and level with piping lane crown beam 43, main part bottom plate structure passes through power transmission structure 7 and communicates the first way of support 41 formation power transmission system of piping lane through piping lane crown beam 43.
The pipe gallery enclosure combined pile 42 is a combination of a rotary excavating pile 421 and a rotary spraying pile 422, wherein the rotary excavating pile is a stressed pile, and the rotary spraying pile is located between the rotary excavating piles to form a water stopping pile.
The base level height of main part bottom plate bed course 5 is higher than the top elevation of piping lane guan liang 43, power transmission structure 7 is interim component, interim component includes for slant dowel steel 71, slant dowel steel 71 leads to the length setting respectively along the top both sides of dark piping lane foundation ditch 2, the outer terminal surface of slant dowel steel 71 and the interior terminal surface fixed connection of main part bottom plate 6, the interior terminal surface of slant dowel steel 71 and the outer terminal surface fixed connection of piping lane guanliang 43, slant dowel steel 71 is reinforced concrete structure, and slant dowel steel 71's reinforcing bar both ends and 6 reinforcing bars of main part bottom plate and piping lane guanliang 43 reinforcing bar all anchor, and slant dowel steel 71's concrete label is not less than the label of 6 concrete of main part bottom plate, and the biography power path of power transmission system is main part bottom plate 6, slant dowel steel 71, piping lane guanliang 43 and the first way interior support 41 of piping lane guanliang.
In this embodiment, the scheme of applying the temporary force transfer member between the main body bottom plate and the first support of the pipe gallery is provided. The oblique force transmission component of the force transmission component is characterized in that the elevation of the main body bottom plate structure is different from the elevation of the inner support in the first channel of the pipe gallery. The concrete strength, reinforcing bars, thickness and width of the oblique force transmission component can be the same as those of the main body bottom plate structure, the load borne by the main body bottom plate structure is transmitted to the first inner support of the pipe gallery through the oblique force transmission component, and the balance among the component distance, the component section size and the bottom plate stress is realized through the checking calculation of the bearing capacity of the oblique force transmission component.
Referring to fig. 4, the stress F and the horizontal component F of the oblique force transmission component are checked1Vertical component force F2And indexes such as stress N of the first inner support of the pipe gallery.
The construction method for the deep pipe gallery structure and the main body structure return building connection structure comprises the following construction steps:
constructing a main body enclosure combined pile 31 and a main body crown beam 32 from the ground surface according to design;
step two, excavating a main structure foundation pit 1 in the main body enclosure structure 3, and constructing a main body first inner support 33, a main body second inner support 34 and a main body third inner support 35 layer by layer from top to bottom during downward excavation;
constructing a pipe gallery enclosure combined pile 42 and a pipe gallery crown beam 43 from the pit bottom of the main structure foundation pit 1 and the range of the deep pipe gallery structure;
fourthly, excavating a deep pipe gallery foundation pit 2 in the pipe gallery enclosure structure 4, and constructing a first inner support of the pipe gallery when excavating downwards;
constructing a main body bottom plate structure according to design, wherein the main body bottom plate structure is disconnected by the deep pipe gallery foundation pit 2 at the position of the critical deep pipe gallery foundation pit 2;
constructing a force transmission structure 7 between the main body bottom plate structure and the top of the first inner support 41 of the pipe gallery according to design, completing a force transmission system path between the main body bottom plate structure and the first inner support 41 of the pipe gallery, and closing the disconnected main body bottom plate structure within the range of the deep pipe gallery foundation pit 2;
the construction steps of the sixth step are as follows:
step a, specially designing and checking the oblique force transfer plate 71, including checking the bearing capacity of the oblique force transfer plate 71, so as to ensure the arrangement interval, the section size and the stress balance of the oblique force transfer plate 71; the stress balance is the stress balance between the inclination angle of the oblique force transmission plate 71 and the main body bottom plate 6;
and b, paving the reinforcing steel bars in the oblique force transfer plate 71 according to the design, anchoring the reinforcing steel bars with the reinforcing steel bars of the main body bottom plate 6 and the reinforcing steel bars of the pipe gallery crown beam 43, and pouring concrete of the oblique force transfer plate 71, so that the two ends of the oblique force transfer plate 71 are respectively connected with the main body bottom plate 6 and the pipe gallery crown beam 43.
Seventhly, simultaneously performing downward construction of the deep pipe gallery structure and upward construction of the main body structure under the guarantee of the force transmission system;
wherein the construction sequence of major structure does: sequentially dismantling a third support of the main body, constructing a negative first-floor structure 8, sequentially dismantling a first inner support 33 of the main body, constructing a top plate structure 9 of the main body and tightly dismantling a second support of the main body;
the construction sequence of deep pipe gallery structure does: continuously downwards excavating a second tunnel inner support 44 of the construction pipe gallery, constructing a bottom plate structure 10 of the deep pipe gallery, dismantling the second tunnel inner support 44 of the pipe gallery, and constructing a top plate structure 11 of the deep pipe gallery;
step eight, dismantling a force transmission system: selecting whether to remove the force transmission structure 7 and the first inner support 41 of the pipe gallery according to requirements;
and step nine, closing the main body bottom plate structure.
Second embodiment, as shown in fig. 5-6, in contrast to the first embodiment, the force transmission structure 7 is a permanent component, the permanent components include a main body bottom plate cushion 5 which is thickened downwards, the bottom elevation of the main body bottom plate cushion 5 is lower than the top elevation of the pipe gallery crown beam 43, so that the two-part structure vertically has an overlapping thickness at the edge of the deep pipe gallery foundation pit 2, the main body floor mat layer 5 comprises a body layer 51 and a thickening layer 52 from top to bottom, the thinnest thickness of the thickening layer 52 is based on the transmission of supporting axial force, the main body floor mat layer 5 is formed by plain concrete, and anti-crack reinforcing mesh is arranged in the thickening layer 52, the inner side of the thickening layer 52 is tightly propped against the outer side of the pipe gallery crown beam 43 and is connected into a whole through a buried connecting piece, and the force transmission path of the force transmission system is the main body bottom plate cushion layer 5, the pipe gallery crown beam 43 and the first inner support 41 of the pipe gallery.
This embodiment increases bed course thickness, supports formation horizontal biography power system with the first way of piping lane. The main body bottom plate bed course has two effects, generally for the quick back cover that is used for forming the foundation ditch, guarantees the safety of foundation ditch, also as the template of main body bottom plate construction. In the embodiment, a plain concrete layer with the thickness of 30cm is used as a cushion layer, so that larger pressure can be borne, and the transmission of the supporting axial force can be realized. The thickness of bed course is increased, makes main part bottom plate bed course and the first way interior support of piping lane overlap at vertical internal portion, forms the power transmission system of level to. The structural steel bars are arranged in the cushion layer of the main body bottom plate, so that the cushion layer is prevented from cracking caused by the raised pit bottom, and the horizontal force transfer capability of the cushion layer is reduced.
Referring to fig. 6, the inner supports in the first pass of the thickening layer and the pipe gallery are checked to bear the stress on the two sides of the crown beam of the pipe gallery.
The construction method for the deep pipe gallery structure and the main body structure return building connection structure comprises the following construction steps:
constructing a main body enclosure combined pile 31 and a main body crown beam 32 from the ground surface according to design;
before excavating the main structure foundation pit 1, specially designing and checking a main body bottom plate cushion layer 5, wherein the special design and checking comprises the thickness design of a body layer 51 and a thickening layer 52, and further comprises a connecting node between a pipe gallery crown beam 43 and a pipe gallery enclosure combined pile 42 and lateral stress on two sides of the pipe gallery crown beam 43; step two, when the earth of the thickening layer 52 needs to be excavated downwards;
digging a main structure foundation pit 1 in a main body enclosure structure 3, and constructing a main body first inner support 33, a main body second inner support 34 and a main body third inner support 35 layer by layer from top to bottom during downward digging;
constructing a pipe gallery enclosure combined pile 42 and a pipe gallery crown beam 43 from the pit bottom of the main structure foundation pit 1 and the range of the deep pipe gallery structure;
fourthly, excavating a deep pipe gallery foundation pit 2 in the pipe gallery enclosure structure 4, and constructing a first inner support of the pipe gallery when excavating downwards;
constructing a main body bottom plate structure according to design, wherein the main body bottom plate structure is disconnected by the deep pipe gallery foundation pit 2 at the position of the critical deep pipe gallery foundation pit 2;
the construction steps of the fifth step are as follows:
step a, according to design, constructing a main body bottom plate cushion layer 5, a body layer 51 and a thickening layer 52 into a whole, and laying an anti-crack reinforcing mesh during construction;
and step b, constructing a main body bottom plate 6 on the upper side of the main body cushion layer.
Constructing a force transmission structure 7 between the main body bottom plate structure and the top of the first inner support 41 of the pipe gallery according to design, completing a force transmission system path between the main body bottom plate structure and the first inner support 41 of the pipe gallery, and closing the disconnected main body bottom plate structure within the range of the deep pipe gallery foundation pit 2;
seventhly, simultaneously performing downward construction of the deep pipe gallery structure and upward construction of the main body structure under the guarantee of the force transmission system;
wherein the construction sequence of major structure does: sequentially dismantling a third support of the main body, constructing a negative first-floor structure 8, sequentially dismantling a first inner support 33 of the main body, constructing a top plate structure 9 of the main body and tightly dismantling a second support of the main body;
the construction sequence of deep pipe gallery structure does: continuously downwards excavating a second tunnel inner support 44 of the construction pipe gallery, constructing a bottom plate structure 10 of the deep pipe gallery, dismantling the second tunnel inner support 44 of the pipe gallery, and constructing a top plate structure 11 of the deep pipe gallery;
step eight, dismantling a force transmission system: selecting whether to remove the force transmission structure 7 and the first inner support 41 of the pipe gallery according to requirements;
and step nine, closing the main body bottom plate structure.
Third embodiment referring to fig. 7-8, in contrast to the first embodiment, the force transfer structure 7 is a temporary component, the temporary members comprise a set of piping lane stubs 72 added along the top of the piping lane enclosure 4, the pipe gallery short columns 72 are arranged at intervals along the top of the pipe gallery crown beam 43 and are fixedly connected with the pipe gallery short columns 72, the pipe gallery short columns 72 correspond to the pipe gallery enclosure combined piles 42 one by one from top to bottom, the vertical lifting arrangement of the first inner support 41 of the pipe gallery, the top elevation of the short columns 72 of the pipe gallery, the top elevation of the first inner support 41 of the pipe gallery and the top elevation of the main body bottom plate structure are flush, the two ends of the first inner support 41 of the pipe gallery are respectively and fixedly connected between the short columns 72 of the pipe galleries on the two sides, the inboard top of main part bottom plate structure tightly supports the outside of piping lane short column 72, and the biography power route of biography power system is main part bottom plate structure, piping lane short column 72 and the first way interior support 41 of piping lane.
In this embodiment, promote the elevation of pipe gallery first way interior support to the elevation height of main part bottom plate structure, form horizontal biography power system, support for interim component in the examination pipe gallery first way, and adopt in the former scheme of deciding in the same direction as the construction order of tearing open, tear open the pipe gallery first way interior support back construction pipe gallery roof structure promptly. Therefore, the scheme of supporting the elevation in the first pass of the lifting pipe gallery is provided. In this scheme, the first way of pipe gallery is supported and main part bottom plate structure on same elevation, with the help of the first way of pipe gallery is supported, and main part bottom plate structure can form horizontal biography power system, does not have the slant to pass power component, and main part bottom plate structure atress etc. is better, does not increase bed course thickness, does not also influence the excavation depth of foundation ditch. However, the building envelope of the deep pipe gallery foundation pit is considered to be constructed, the elevation of the first inner support of the pipe gallery is improved, and the top elevation of the building envelope must be improved. Therefore, the scheme of adding the temporary vertical member according to the position of the vertical support of the main body enclosure structure is provided.
Constructing a main body enclosure combined pile 31 and a main body crown beam 32 from the ground surface according to design;
step two, excavating a main structure foundation pit 1 in the main body enclosure structure 3, and constructing a main body first inner support 33, a main body second inner support 34 and a main body third inner support 35 layer by layer from top to bottom during downward excavation;
constructing a pipe gallery enclosure combined pile 42 and a pipe gallery crown beam 43 from the pit bottom of the main structure foundation pit 1 and the range of the deep pipe gallery structure;
fourthly, excavating a deep pipe gallery foundation pit 2 in the pipe gallery enclosure structure 4, and constructing a first inner support of the pipe gallery when excavating downwards;
constructing a main body bottom plate structure according to design, wherein the main body bottom plate structure is disconnected by the deep pipe gallery foundation pit 2 at the position of the critical deep pipe gallery foundation pit 2;
constructing a force transmission structure 7 between the main body bottom plate structure and the top of the first inner support 41 of the pipe gallery according to design, completing a force transmission system path between the main body bottom plate structure and the first inner support 41 of the pipe gallery, and closing the disconnected main body bottom plate structure within the range of the deep pipe gallery foundation pit 2;
the construction steps of the sixth step are as follows:
step a, specially designing and checking the pipe gallery short column 72, wherein the specially designing and checking comprises the connecting node of the pipe gallery short column 72 and the pipe gallery crown beam 43, the transmission of the supporting force between the main body bottom plate structure and the pipe gallery short column 72 and the height design of the pipe gallery short column 72; also comprises the checking of the integral deformation, stress and stability of the pipe gallery enclosure structure 4,
b, continuously casting a reinforced concrete pipe gallery short column 72 on the top of the original pipe gallery crown beam 43 in situ, wherein the steel bars of the pipe gallery short column 72, the steel bars of the pipe gallery crown beam 43 and the steel bars of the main body bottom plate structure are respectively anchored;
and c, correspondingly and fixedly connecting the two ends of the first-way inner support 41 of the pipe gallery between the short columns 72 of the pipe gallery.
Seventhly, simultaneously performing downward construction of the deep pipe gallery structure and upward construction of the main body structure under the guarantee of the force transmission system;
wherein the construction sequence of major structure does: sequentially dismantling a third support of the main body, constructing a negative first-floor structure 8, sequentially dismantling a first inner support 33 of the main body, constructing a top plate structure 9 of the main body and tightly dismantling a second support of the main body;
the construction sequence of deep pipe gallery structure does: continuously downwards excavating a second tunnel inner support 44 of the construction pipe gallery, constructing a bottom plate structure 10 of the deep pipe gallery, dismantling the second tunnel inner support 44 of the pipe gallery, and constructing a top plate structure 11 of the deep pipe gallery;
step eight, dismantling a force transmission system: selecting whether to remove the force transmission structure 7 and the first inner support 41 of the pipe gallery according to requirements;
and step nine, closing the main body bottom plate structure.
Claims (10)
1. The utility model provides a be used for deep pipe gallery structure and major structure to build connection structure back, its characterized in that: comprises a main structure foundation pit (1) and a deep pipe gallery foundation pit (2) which is positioned in the main structure foundation pit (1) and is arranged downwards from the bottom of the main structure foundation pit (1), wherein a main body enclosure structure (3) is arranged in the soil body around the main structure foundation pit (1), a pipe gallery enclosure structure (4) is arranged in the soil body around the deep pipe gallery foundation pit (2),
the main body structure foundation pit (1) is internally provided with a constructed main body bottom plate structure, the main body bottom plate structure comprises a constructed main body bottom plate cushion layer (5) and a main body bottom plate (6) from bottom to top, the main body bottom plate structure is disconnected within the range of the deep pipe gallery foundation pit (2), the main body bottom plate structure is higher than the pipe rack building envelope (4), the pipe rack building envelope (4) comprises a pipe rack inner support, the pipe rack inner support comprises a pipe rack first-way inner support (41) arranged at the top of the pipe rack enclosure structure (4), a force transmission structure (7) is additionally arranged between the end part of the main body bottom plate structure critical deep pipe gallery foundation pit (2) and the outer side of the top part of the pipe gallery first inner support (41), the main body bottom plate structure is communicated with the pipe gallery first inner support (41) through the force transmission structure (7) to form a force transmission system, the main body bottom plate structure is disconnected within the range of the power transmission system closed deep pipe gallery foundation pit (2).
2. The return construction connection structure for the deep pipe gallery structure and the main body structure according to claim 1, characterized in that: piping lane envelope structure (4) still include piping lane envelope combination pile (42) and piping lane guan liang (43), the top that each piping lane envelope combination pile (42) was connected in piping lane guanliang (43) forms integratively, piping lane envelope combination pile (42) are for digging soon the combination of stake (421) and spout soon stake (422), and wherein dig soon the stake for the atress stake, spout soon the stake be located to dig soon and form the stagnant water stake between the stake.
3. The return construction connection structure for the deep pipe gallery structure and the main body structure according to claim 2, characterized in that: the both ends of interior support (41) in the first way of piping lane prop up between piping lane crown beam (43) of both sides to the elevation that interior support (41) in the first way of piping lane is the same and the top surface parallel and level with piping lane crown beam (43), main part bottom plate structure passes through power transmission structure (7) and forms the power transmission system through interior support (41) in the first way of piping lane crown beam (43) intercommunication piping lane.
4. The return construction connection construction for deep pipe gallery structures and main body structures according to claim 2 or 3, characterized in that: the bottom elevation of the main body bottom plate cushion layer (5) is higher than the top elevation of the pipe gallery crown beam (43), the force transmission structure (7) is a temporary component, the temporary component comprises an oblique force transmission plate (71), the oblique force transmission plate (71) is respectively arranged on two sides of the top of the deep pipe gallery foundation pit (2) in a through mode, the outer end face of the oblique force transmission plate (71) is fixedly connected with the inner end face of the main body bottom plate (6), the inner end face of the oblique force transmission plate (71) is fixedly connected with the outer end face of the pipe gallery crown beam (43), the oblique force transmission plate (71) is of a reinforced concrete structure, two ends of reinforcing steel bars of the oblique force transmission plate (71) are anchored with the reinforcing steel bars of the main body bottom plate (6) and the reinforcing steel bars of the pipe gallery crown beam (43), the concrete mark number of the oblique force transmission plate (71) is not lower than that of the concrete mark number of the main body bottom plate (6), and the force transmission path of the force transmission system is the main body bottom plate (6), The inclined force transfer plate (71), the pipe gallery crown beam (43) and the first-way inner support (41) of the pipe gallery.
5. The return construction connection construction for deep pipe gallery structures and main body structures according to claim 2 or 3, characterized in that: the force transfer structure (7) is a permanent component comprising a main body bottom plate cushion layer (5) thickened downwards, the bottom elevation of the main body bottom plate cushion layer (5) is lower than the top elevation of the pipe gallery crown beam (43) so that the two parts of structures vertically have overlapping thickness at the edge of the deep pipe gallery foundation pit (2), the main body bottom plate cushion layer (5) comprises a body layer (51) and a thickening layer (52) from top to bottom, the thinnest thickness of the thickening layer (52) is based on the transmission of the supporting axial force, the main body bottom plate cushion layer (5) is formed by plain concrete, and lay anti reinforcement net that splits in thickening layer (52), the inboard top of thickening layer (52) and the outside top of piping lane crown beam (43) is tight and through burying the connecting piece underground and connect as an organic wholely, and the biography power route of power transmission system is support (41) in main part bottom plate bed course (5), piping lane crown beam (43) and the first way of piping lane.
6. The return construction connection structure for the deep pipe gallery structure and the main body structure according to claim 2, characterized in that: the force transfer structure (7) is a temporary component which comprises a group of pipe gallery short columns (72) additionally arranged along the top of the pipe gallery enclosure structure (4), the pipe gallery short columns (72) are arranged at intervals along the top of the pipe gallery crown beam (43) and are fixedly connected with the pipe gallery short columns, the pipe gallery short columns (72) and the pipe gallery enclosure combined piles (42) are in one-to-one correspondence from top to bottom, the vertical lifting arrangement of the first inner support (41) of the pipe gallery, the top elevation of the short column (72) of the pipe gallery, the top elevation of the first inner support (41) of the pipe gallery and the top elevation of the main body bottom plate structure are parallel and level, the two ends of the first inner support (41) of the pipe gallery are respectively and fixedly connected between the short columns (72) of the pipe galleries on the two sides, the inboard top of main part bottom plate structure is in the outside of tight piping lane short column (72), and the biography power route of biography power system is for main part bottom plate structure, piping lane short column (72) and first way interior support (41) of piping lane.
7. A construction method for a deep pipe gallery structure and main structure return building connection structure according to any one of claims 2 to 6, characterized in that the main structure is an underground structure and sequentially comprises a main bottom plate structure, a negative first-floor structure (8) and a main top plate structure (9) from bottom to top, the main enclosure structure (3) comprises a main enclosure combined pile (31), a main crown beam (32) and a main inner support, the main inner support sequentially comprises a main first inner support (33), a main second inner support (34) and a main third inner support (35) from top to bottom, the deep pipe gallery structure comprises a deep pipe gallery bottom plate structure (10) and a deep pipe gallery top plate structure (11), the pipe gallery inner support sequentially comprises a pipe gallery first inner support (41) and a pipe gallery second inner support (44) from top to bottom,
the construction steps are as follows:
constructing a main body enclosure combined pile (31) and a main body crown beam (32) from the ground surface according to design;
secondly, digging a main structure foundation pit (1) in the main enclosure structure (3), and constructing a main first inner support (33), a main second inner support (34) and a main third inner support (35) layer by layer from top to bottom during downward digging;
constructing a pipe gallery enclosure combined pile (42) and a pipe gallery crown beam (43) from the pit bottom of the main structure foundation pit (1) and the range of the deep pipe gallery structure;
fourthly, excavating a deep pipe gallery foundation pit (2) in the pipe gallery enclosure structure (4), and constructing a first inner support of the pipe gallery when excavating downwards;
constructing a main body bottom plate structure according to design, wherein the main body bottom plate structure is disconnected by the deep pipe gallery foundation pit (2) at the position of the critical deep pipe gallery foundation pit (2);
constructing a force transmission structure (7) between the main body bottom plate structure and the top of the first inner support (41) of the pipe gallery according to design, completing a force transmission system path between the main body bottom plate structure and the first inner support (41) of the pipe gallery, and closing the disconnected main body bottom plate structure within the range of the deep pipe gallery foundation pit (2);
seventhly, simultaneously performing downward construction of the deep pipe gallery structure and upward construction of the main body structure under the guarantee of the force transmission system;
wherein the construction sequence of major structure does: sequentially detaching a third support of the main body, constructing a negative first-floor structure (8), sequentially detaching a first inner support (33) of the main body, constructing a top plate structure (9) of the main body and tightly detaching a second support of the main body;
the construction sequence of deep pipe gallery structure does: continuously downwards excavating a second in-channel inner support (44) of the construction pipe gallery, constructing a bottom plate structure (10) of the deep pipe gallery, dismantling the second in-channel inner support (44) of the pipe gallery, and constructing a top plate structure (11) of the deep pipe gallery;
step eight, dismantling a force transmission system: selecting whether to dismantle the force transmission structure (7) and the first inner support (41) of the pipe gallery according to requirements;
and step nine, closing the main body bottom plate structure.
8. The construction method for the deep pipe gallery structure and main body structure return building connection structure according to claim 7, wherein the construction steps of the step six are as follows:
step a, specially designing and checking an oblique force transfer plate (71), including checking the bearing capacity of the oblique force transfer plate (71), so as to ensure the arrangement interval, the section size and the stress balance of the oblique force transfer plate (71); the stress balance is the stress balance between the inclination angle of the oblique force transmission plate (71) and the main body bottom plate (6);
and b, paving reinforcing steel bars in the oblique force transfer plate (71) according to design, anchoring the reinforcing steel bars with reinforcing steel bars of the main body bottom plate (6) and reinforcing steel bars of the pipe gallery crown beam (43), and pouring concrete of the oblique force transfer plate (71), so that two ends of the oblique force transfer plate (71) are respectively connected with the main body bottom plate (6) and the pipe gallery crown beam (43).
9. The construction method for the deep pipe gallery structure and the main body structure return building connection construction according to claim 7,
before excavating the foundation pit (1) with the main structure, specially designing and checking a main bottom plate cushion layer (5), wherein the special design and checking comprises the thickness design of a body layer (51) and a thickening layer (52), and further comprises a connecting node between a pipe gallery crown beam (43) and a pipe gallery enclosure combined pile (42) and lateral stress on two sides of the pipe gallery crown beam (43); step two, when the earth is excavated downwards, earth of the thickening layer (52) needs to be excavated continuously;
the construction steps of the fifth step are as follows:
step a, constructing a main body bottom plate cushion layer (5), a body layer (51) and a thickening layer (52) into a whole according to design, and laying an anti-crack reinforcing mesh during construction;
and step b, constructing a main body bottom plate (6) on the upper side of the main body cushion layer.
10. The construction method for the deep pipe gallery structure and main body structure return building connection structure according to claim 7, wherein the construction steps of the step six are as follows:
step a, specially designing and checking a pipe gallery short column (72), wherein the specially designing and checking comprises a connecting node of the pipe gallery short column (72) and a pipe gallery crown beam (43), the transmission of supporting force between a main body bottom plate structure and the pipe gallery short column (72) and the height design of the pipe gallery short column (72); also comprises the checking of the integral deformation, stress and stability of the pipe gallery enclosure structure (4),
b, continuously casting a reinforced concrete pipe gallery short column (72) on the top of the original pipe gallery crown beam (43), wherein the steel bars of the pipe gallery short column (72), the steel bars of the pipe gallery crown beam (43) and the steel bars of the main body bottom plate structure are respectively anchored;
and c, correspondingly and fixedly connecting the two ends of the first-way inner support (41) of the pipe gallery between the short columns (72) of the pipe gallery.
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Application publication date: 20211203 |