CN101684669B - Submersed type inspection well construction method - Google Patents
Submersed type inspection well construction method Download PDFInfo
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- CN101684669B CN101684669B CN2008101414812A CN200810141481A CN101684669B CN 101684669 B CN101684669 B CN 101684669B CN 2008101414812 A CN2008101414812 A CN 2008101414812A CN 200810141481 A CN200810141481 A CN 200810141481A CN 101684669 B CN101684669 B CN 101684669B
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Abstract
The invention discloses a submersed type inspection well which comprises a well cover above the ground as well as a shaft and a well body structure below the well cover, wherein the traditional drainage pipe is arranged below the shaft, a foundation is arranged between the lower end of the shaft and the drainage pipe, and the lower end of the shaft, the upper end of the foundation and the pipe are poured into a whole; the diameter of the foundation is larger than the outer diameter of the shaft, and the bottom end of the foundation is located below the sheath of the traditional drainage pipe; and the bottom end of the foundation is inwards extended below the traditional drainage pipe. The invention also discloses a construction method for realizing the inspection well, which comprises the following construction stages: (1) placing the inspection well; (2) submersing, joining and measuring the shaft; (3) manufacturing the foundation of the inspection well and communicating the shaft with the traditional drainage pipe; and (4) mounting a shaft cover plate and a ladder. By adopting the structure and the method of the invention, the inspection well is conveniently manufactured by adopting a submersed type construction method so as to be beneficial to carrying out long-distance jacking pipe construction and developing novel prefabricated inspection well structures and convenient for carrying out pipe engineering construction in downtown areas without excavating.
Description
Technical field
The present invention relates to the job practices of Submersed type inspection well.
Background technology
Jacking construction is the main construction method of cities and towns drainage works non-excavation underground pipeline construction, and it does not need to excavate surface layer, and can highway crossing, railway, rivers and creeks, above ground structure, underground structure and various underground utilities etc.Have free from environmental pollution, do not influence traffic, little to the stratum structural deterioration, construction safety is reliable, the cycle is short, need not transportation and stack that assorted soil, cost are low, advantages such as social benefit and remarkable in economical benefits.In the past, the push pipe worker is as a kind of special construction means, unless it is absolutely necessary, does not generally adopt easily.Therefore, push pipe often is taken as railroad crossing, highway, rivers and creeks or the like special construction means, and the distance of construction is generally also shorter, mostly about 20～30m.Yet, development and the effective utilization of thixotropic slurry drag reduction and the raising day by day of pipe jacking tunnelling machine technology along with the relay well technology, jacking construction is accepted by the owner widely as a kind of conventional construction technology, and the distance of one-time continuous jacking is also more and more longer.Now, the one-time continuous jacking has been quotidian thing for hundred meters, and a jacking of conventional jacking construction distance is about 200 meters.It is far away that the longest one-time continuous jacking distance can reach thousands of rice.Must make manhole in the jacking construction, existing manhole all will adopt the method for the small-sized foundation ditch of excavation to make.Code for design of outdoor sewerage engineering (GB50201-2005) requires manhole should not surpass the requirement of following table at the maximum spacing of straight line pipeline section according to concrete conditions such as dredging methods:
The manhole maximum spacing
As requirement design Mechanical Pipe-lifting Project according to Code for design of outdoor sewerage engineering (GB50201-2005), then the longest distance of push pipe can not be above 120 meters according to last table, certainly will increase the quantity of active well or received well like this, increase the cost of pipe-jacking project, hinder the development of jacking pipe construction process.Keep somewhere the limited contradiction of distance for solving long-distance pipe jacking construction and manhole, we have developed the immersed tube manhole, and developed its construction technology, and fully guaranteed unrestrictedly long-distance pipe jacking of underground pipeline engineering jacking construction, satisfy the demand of pipe network maintenance simultaneously.
Summary of the invention
First technical problem to be solved by this invention provides a kind of job practices of Submersed type inspection well.
Second technical problem to be solved by this invention provides the job practices of another kind of Submersed type inspection well.
For solving above-mentioned first kind of technical problem, the Submersed type inspection well that job practices was suitable for of Submersed type inspection well of the present invention comprises the pit shaft of ground well lid and well lid below, the pit shaft below is existing drainage pipe, be cast with the basis between pit shaft lower end and the drainage pipe, the pit shaft lower end is cast for one with the upper end, basis, the basis diameter is greater than the pit shaft external diameter, and basic bottom is positioned at existing drainage pipe crust below, and basic bottom extends inwardly to existing drainage pipe below; Described pit shaft comprises two parts up and down, the epimere pit shaft extends downward roadbed absolute altitude and its cross section less than hypomere pit shaft cross section from the road surface, the hypomere pit shaft adopts segmented being spliced of " F " shaped steel reinforced concrete pipe, and intersegmental interface is provided with rubber seal; The job practices of Submersed type inspection well of the present invention is successively by carrying out with the next stage: (1) manhole position unwrapping wire; (2) pit shaft is measured and is sunk; (3) making of manhole basis and pit shaft and existing drainage pipe is communicated with; (4) the pit shaft cover plate is laid and is connected well-sinking; The step that stage (1) comprises at first is that axis and the absolute altitude that will have drainage pipe now draw survey to ground, measures the manhole position, emits cross hairs; Next is to add all around in the manhole position to treat that the open caisson tube is made, sinking control stake; The step the first that stage (2) comprises is on the outer wall for the treatment of the open caisson tube, with color lines sign altitude scale line, the elongated ejection axis of symmetry about outer wall simultaneously; The secondth, treating also to eject line of symmetry with the outer wall correspondence position on the open caisson tube inwall, and at the pre-buried hanging wire fall device of peak; The 3rd is to adopt the dry type sinking method to carry out the segmented sinking of hypomere pit shaft, vertically lays pit shaft according to aforementioned manhole measuring position, and " F " mouth down is as the basil of well-sinking; The 4th is in the well-sinking process, at any time grasp sinking pit shaft elevation with level gauge observation well outer wall altitude scale line, and adopt transit to prop up on two well point center lines or on the extended line, Observing axis is to line of symmetry control pit shaft left and right displacement, according to the bob of well inwall line and the axis of symmetry, check sinking pit shaft inclination situation, and carry out the pit shaft correction according to above-mentioned measurement result; In the well-sinking process, when the first segment pit shaft sinks to existing drainage pipe top, bird type rubber sealing collar is installed then, is coated 851 polyamine fat in this joint pit shaft end and film and wood lining is installed behind the rubber coating the 851 polyamine fat rubber of filming in one week of first segment pit shaft top, then laying the second pipe joint material carries out pit shaft and connects height, pit shaft connects that high axis and pit shaft axis overlap or is parallel, repeat pit shaft connect high process with the hypomere pit shaft connect high to the road surface following 2.5 meters; Press the sinking stage computes convergence coefficient and the coefficient of stability in the well-sinking process, and according to result of calculation control subsidence velocity; Cast-in-place concrete structure is adopted on the manhole basis in stage (3), the step the first that stage (3) comprises be when well-sinking to the existing drainage pipe at ordinary times, stop well-sinking and excavate the manhole basis, the basis diameter is than pit shaft external diameter 〉=0.1 meter, the degree of depth reaches 0.3 meter of existing drainage pipe crust below, the bottom, basis extends inwardly to 1/3 place of existing drainage pipe diameter, the secondth, abolish existing pipeline to 1/2 place, build the first floor concrete to following 0.05 meter of semicanal of existing gutter and make waterstop herein, with the gutter bar bending to the structure muscle of shaft location as the manhole basis, with the reinforcement foundation colligation together, build second layer concrete, finish the making on manhole basis; The step the first that stage (4) comprises is that absolute altitude is flat to the existing drainage pipe at the bottom of the hypomere well-sinking, control absolute altitude in hypomere pit shaft upper end is roadbed absolute altitude place, and lay prefabricated well lid plate in hypomere pit shaft upper end, the area of cover plate is poor more than or equal to hypomere pit shaft section area and epimere pit shaft section area, and on the cover board directly carries out the construction of roadbed; The secondth, the roadbase construction exposed parts of back in hypomere pit shaft upper end that finish connects the epimere pit shaft to grade elevation, and with the upper end of well lid sealing epimere pit shaft, finishes the making of manhole.
Under the groundwater table condition with higher, the described stage (2) should be taked large open well precipitation in the manhole position on every side before enforcement; In the process of the step 4 well-sinking in stage 2, select for use to load or mud lubrication cover method reduces pit shaft side friction resistance.
For solving above-mentioned second technical problem, the Submersed type inspection well that job practices was suitable for of Submersed type inspection well of the present invention comprises the pit shaft of ground well lid and well lid below, the pit shaft below is existing drainage pipe, it is characterized in that: be cast with the basis between pit shaft lower end and the drainage pipe, the pit shaft lower end is cast for one with the upper end, basis, the basis diameter is greater than the pit shaft external diameter, and basic bottom is positioned at existing drainage pipe crust below, and basic bottom extends inwardly to existing drainage pipe below; Described pit shaft adopts segmented being spliced of " F " shaped steel reinforced concrete pipe, and intersegmental interface is provided with rubber seal;
The job practices of Submersed type inspection well is successively by carrying out with the next stage:
(1) manhole position unwrapping wire
The step that this stage comprises at first is that axis and the absolute altitude that will have drainage pipe now draw survey to ground, measures the manhole position, emits cross hairs; Next is to add all around in the manhole position to treat that the open caisson tube sinks to controlling stake;
(2) pit shaft is measured and is sunk
The step the first that this stage comprises is on the outer wall for the treatment of the open caisson tube, with color lines sign altitude scale line, the elongated ejection axis of symmetry about outer wall simultaneously; The secondth, treating also to eject line of symmetry with the outer wall correspondence position on the open caisson tube inwall, and at the pre-buried hanging wire fall device of peak; The 3rd is to adopt the dry type sinking method to carry out the segmented sinking of pit shaft, vertically lays pit shaft according to aforementioned manhole measuring position, and " F " mouth down is as the basil of well-sinking; The 4th is in the well-sinking process, at any time grasp sinking pit shaft elevation with level gauge observation well outer wall altitude scale line, and adopt transit to prop up on two well point center lines or on the extended line, Observing axis is to line of symmetry control pit shaft left and right displacement, according to the bob of well inwall line and the axis of symmetry, check sinking pit shaft inclination situation, and carry out the pit shaft correction according to above-mentioned measurement result; In the well-sinking process, when the first segment pit shaft sinks to existing drainage pipe top, bird type rubber sealing collar is installed then, is coated 851 polyamine fat in this joint pit shaft end and film and wood lining is installed behind the rubber coating the 851 polyamine fat rubber of filming in one week of first segment pit shaft top, then laying the second pipe joint material carries out pit shaft and connects height, pit shaft connects high axis and pit shaft axis coincidence or parallel, and the repetition pit shaft connects high process and pit shaft connect high to the road surface; Press the sinking stage computes convergence coefficient and the coefficient of stability in the well-sinking process, and according to result of calculation control subsidence velocity;
(3) making of manhole basis and pit shaft and drainage pipe is communicated with
Cast-in-place concrete structure is adopted on the manhole basis in this stage, the step the first that stage (3) comprises be when well-sinking to the existing drainage pipe at ordinary times, stop well-sinking and excavate the manhole basis, the basis diameter is than pit shaft external diameter 〉=0.1 meter, the degree of depth reaches 0.3 meter of existing drainage pipe crust below, the bottom, basis extends inwardly to 1/3 place of existing drainage pipe diameter, the secondth, abolish existing pipeline to 1/2 place, build the first floor concrete to following 0.05 meter of semicanal of existing gutter and make waterstop herein, with the gutter bar bending to the structure muscle of shaft location as the manhole basis, with the reinforcement foundation colligation together, build second layer concrete, finish the making on manhole basis; With the upper end of well lid sealing pit shaft, finish the making of manhole at last.
The job practices of Submersed type inspection well of the present invention has realized the making of Submersed type inspection well simply and easily.
" F " mouth down of " F " shaped steel reinforced concrete pipe can be accelerated the subsidence velocity of pit shaft as the basil of well-sinking.Pit shaft connects high axis and pit shaft axis coincidence or parallel, can prevent the pit shaft deflection that the load inequality causes.The bottom, basis extends inwardly to 1/3 place of existing drainage pipe diameter, has prevented that effectively existing drainage pipe from producing additional displacement, wrapped up existing drainage pipe simultaneously effectively.Make waterstop under the semicanal of existing gutter, can prevent the infiltration of manhole basis.
Under the groundwater table condition with higher, the stage (2) is taked large open well precipitation around the sinking pit shaft before enforcement, shaft bottom soil stabilization during with drainage soil layer, assurance excavation.In the process of well-sinking, select for use to load or mud lubrication cover method minimizing pit shaft side friction resistance, can tackle the excessive situation of frictional resistance in the well-sinking.
Description of drawings
Fig. 1 is the structural representation of Submersed type inspection well among the embodiment one;
Fig. 2 is the structural representation of Submersed type inspection well among the embodiment two.
The specific embodiment
Embodiment one
As shown in Figure 1, the Submersed type inspection well that the present invention was suitable for comprises the pit shaft 2 of ground well lid 1 and well lid 1 below, pit shaft 2 belows are existing drainage pipe 5, be cast with basis 3 between pit shaft 2 lower ends and the drainage pipe 5, pit shaft 2 lower ends and basic 3 upper ends are cast for one, basis 3 diameters 〉=pit shaft external diameter+0.1 meter, basic 3 bottoms are positioned at 0.3 meter, existing drainage pipe 5 crusts below, and basic 3 bottoms extend inwardly to 1/3 place of existing drainage pipe 5 diameters.Wherein, pit shaft 2 comprises two parts up and down, epimere pit shaft 2A extends downward roadbed absolute altitude (be generally below the road surface 2.5 meters) and its cross section less than hypomere pit shaft cross section from the road surface, hypomere pit shaft 2B adopts segmented being spliced of " F " shaped steel reinforced concrete pipe, long 2.5 meters of every joint pit shaft, intersegmental interface is provided with rubber seal 6.The part that the last end section of hypomere pit shaft 2B surpasses end section under the epimere pit shaft is provided with pit shaft cover plate 8.
Also be provided with plastic-steel cat ladder 7 on pit shaft 2 inwalls, plastic-steel cat ladder 7 extends downward pit shaft 2 bottoms from pit shaft 2 upper ends.
During Submersed type inspection well of the present invention construction successively by carrying out with the next stage:
(1) manhole position unwrapping wire.
(2) pit shaft 2 is measured and is sunk.
(3) manhole basis 3 makes and being communicated with of pit shaft 2 and existing drainage pipe 5.
(4) pit shaft cover plate 8 lays and connects well-sinking 2A, 2B.
(5) installation of plastic-steel cat ladder 7.
The step that stage (1) comprises at first is that axis and the absolute altitude that will have drainage pipe now draw survey to ground, measures the manhole position, emits cross hairs; Next is to add all around in the manhole position to treat that open caisson tube 2 sinks to controlling stake.
The step the first that stage (2) comprises is on the outer wall for the treatment of open caisson tube 2, with red lacquer sign altitude scale line, the elongated ejection axis of symmetry (vertically being the drainage pipe center line) about outer wall simultaneously; The secondth, treating also to eject line of symmetry with the outer wall correspondence position on open caisson tube 2 inwalls, and at the pre-buried hanging wire fall device of peak; The 3rd is to adopt the dry type sinking method to carry out the segmented sinking of hypomere pit shaft 2, vertically lays pit shaft 2 according to aforementioned manhole measuring position, the basil that " F " mouth down sinks as pit shaft 2; The 4th is in pit shaft 2 sinking processes, at any time grasp the elevation of sinking pit shaft 2 with level gauge observation well outer wall altitude scale line, and adopt transit to prop up on two well point center lines or on the extended line, Observing axis is to line of symmetry control pit shaft 2 left and right displacement, according to the bob of well inwall line and the axis of symmetry, check sinking pit shaft 2 inclination situations, and carry out pit shaft 2 corrections according to above-mentioned measurement result; In the pit shaft 2 sinking processes, when first segment pit shaft 2 sinks to existing drainage pipe 5 tops, bird type rubber sealing collar 9 is installed then, is coated 851 polyamine fat in these joint pit shaft 2 ends and film and wood lining is installed behind the rubber coating the 851 polyamine fat rubber of filming in one week of first segment pit shaft top, then laying the second pipe joint material carries out pit shaft 2 and connects height, pit shaft 2 connects high axis and pit shaft 2 axis coincidence or parallel, and repetition pit shaft 2 connects high process and hypomere pit shaft 2B connect high to 2.5 meters apart from the road surface; Press the sinking stage computes convergence coefficient and the coefficient of stability in the pit shaft 2 sinking processes, and according to result of calculation control subsidence velocity;
Cast-in-place concrete structure is adopted on manhole basis 3 in stage (3), the step the first that stage (3) comprises is to sink on the existing drainage pipe 5 at ordinary times when pit shaft 2, stopping pit shaft 2 sinks, utilize luoyang spade excavation manhole basis, basis 3 diameters are than pit shaft 2 external diameters 〉=0.1 meter, the degree of depth reaches 0.3 meter of existing drainage pipe 5 crusts below, 3 bottoms, basis extend inwardly to 1/3 place of existing drainage pipe 5 diameters, the secondth, abolish existing pipeline 5 to 1/2 places, build the first floor concrete to following 0.05 meter of semicanal of existing gutter and make waterstop herein, with gutter 5 bar bendings to the structure muscle of shaft location as manhole basis 3, with basic 3 reinforcing bar bindings together, build second layer concrete, finish the making on manhole basis;
It is flat to the existing drainage pipe 5 that the step the first that stage (4) comprises is that the hypomere pit shaft sinks to the bottom absolute altitude for 2 times, hypomere pit shaft 2 upper ends control absolute altitude is roadbed absolute altitude place (being generally following 2.5 meters of road surface), and lay prefabricated well lid plate 8 in hypomere pit shaft 2B upper end, the area of cover plate 8 is poor more than or equal to hypomere pit shaft 2B section area and epimere pit shaft 2A section area, and directly carries out the construction of roadbed on cover plate 8; The secondth, the exposed parts of roadbase construction finishing back in hypomere pit shaft 2B upper end connects epimere pit shaft 2A to grade elevation, and seals the upper end of epimere pit shaft 2A with well lid 1.
The job practices in stage (5) is the riding position according to manhole cat ladder 7, and unwrapping wire is measured cat ladder 7 positions on pit shaft 2 inwalls, with Churn drill punching, infusion epoxy resin in the hole, in plastic-steel cat ladder 7 patchholes, finishes cat ladder and installs.
Wherein, the stage (2) relates to the correction of sinking pit shaft 2.Sinking pit shaft 2 correction should be according to survey data with partially with entangling, to accomplish in the sinking process " relying mainly on prevention, is auxilliary to entangle, diligently surveys, entangle slowly, slow entangle, have partially must entangle, entangle then appropriate ".Correction of heavy stage just according to " heavy dig at most few, heavy dig at least many " principle in excavation, rectify a deviation, and must not hollow out correction in a side, should according to circumstances slowly sink, progressively rectify a deviation so that sinking pit shaft 2 in the sinking process symmetrically.Cutting the earth and will progressively enlarge in the sword underfooting, can not once excessively draw and dig.When the open caisson tube sank for several times in 2 minutes instantly, ending in each sinking will strict control deflection.The whole heavy stage must be strengthened monitoring, seeks to stable in accomplishing to delay, and strict control is super heavy.To in time analyze reason when displacement appears in sinking pit shaft 2, work out countermeasure, adopt methods such as inclined to one side side shoveling or eccentric ballast to rectify a deviation in light of the circumstances.
Under the groundwater table condition with higher, the described stage (2) should be taked large open well precipitation in the manhole position on every side before enforcement; In the process that the step 4 pit shaft 2 in stage 2 sinks, select for use to load or mud lubrication cover method reduces pit shaft 2 side friction resistances.
Pit shaft 2 in the present embodiment is divided into two sections, and epimere pit shaft 2A cross section is less, helps avoiding existing pipeline when under the road surface of construction place other pipeline being arranged.
Embodiment two
As shown in Figure 2, the difference of present embodiment and embodiment one is: pit shaft is regardless of epimere pit shaft and hypomere pit shaft (adopting " F " shaped steel reinforced concrete pipe), therefore also pit shaft cover plate 8 need not be set; The cancellation stage (4) during construction; The step 4 in stage (2) should repeat pit shaft at last and connect high process and pit shaft is connect high to the road surface.
Pit shaft 2 in the present embodiment is regardless of the epimere hypomere, does not adopt when should have other pipeline under the road surface of construction place, can simplify construction technology.
Adopt structure of the present invention and job practices, be convenient to adopt the Submersed type job practices to make manhole, carry out the pipe works construction thereby help the carrying out of long-distance pipe jacking construction, the structure of the new-type precast inspection well of exploitation, convenient the excavation in the business district.
Certainly, the present invention includes but be not limited to the foregoing description, as the epimere pit shaft among the embodiment one is not necessarily in the image pattern 1, be located at the right side of lower end pit shaft, also can be located at the left side or the centre of hypomere pit shaft as required.This type of conversion all drops within protection scope of the present invention.
Claims (3)
1. the job practices of Submersed type inspection well, it is characterized in that: described Submersed type inspection well comprises the pit shaft of ground well lid and well lid below, the pit shaft below is existing drainage pipe, be cast with the basis between pit shaft lower end and the drainage pipe, the pit shaft lower end is cast for one with the upper end, basis, the basis diameter is greater than the pit shaft external diameter, and basic bottom is positioned at existing drainage pipe crust below, and basic bottom extends inwardly to existing drainage pipe below; Described pit shaft comprises two parts up and down, the epimere pit shaft extends downward roadbed absolute altitude and its cross section less than hypomere pit shaft cross section from the road surface, the hypomere pit shaft adopts segmented being spliced of " F " shaped steel reinforced concrete pipe, and intersegmental interface is provided with rubber seal;
The job practices of Submersed type inspection well is successively by carrying out with the next stage:
(1) manhole position unwrapping wire;
(2) pit shaft is measured and is sunk;
(3) making of manhole basis and pit shaft and existing drainage pipe is communicated with;
(4) the pit shaft cover plate is laid and is connected well-sinking;
The step that stage (1) comprises at first is that axis and the absolute altitude that will have drainage pipe now draw survey to ground, measures the manhole position, emits cross hairs; Next is to add all around in the manhole position to treat that the open caisson tube is made, sinking control stake;
The step the first that stage (2) comprises is on the outer wall for the treatment of the open caisson tube, with color lines sign altitude scale line, the elongated ejection axis of symmetry about outer wall simultaneously; The secondth, treating also to eject line of symmetry with the outer wall correspondence position on the open caisson tube inwall, and at the pre-buried hanging wire fall device of peak; The 3rd is to adopt the dry type sinking method to carry out the segmented sinking of hypomere pit shaft, vertically lays pit shaft according to aforementioned manhole measuring position, and " F " mouth down is as the basil of well-sinking; The 4th is in the well-sinking process, at any time grasp sinking pit shaft elevation with level gauge observation well outer wall altitude scale line, and adopt transit to prop up on two well point center lines or on the extended line, Observing axis is to line of symmetry control pit shaft left and right displacement, according to the bob of well inwall line and the axis of symmetry, check sinking pit shaft inclination situation, and carry out the pit shaft correction according to above-mentioned measurement result; In the well-sinking process, when the first segment pit shaft sinks to existing drainage pipe top, bird type rubber sealing collar is installed then, is coated 851 polyamine fat in this joint pit shaft end and film and wood lining is installed behind the rubber coating the 851 polyamine fat rubber of filming in one week of first segment pit shaft top, then laying the second pipe joint material carries out pit shaft and connects height, pit shaft connects that high axis and pit shaft axis overlap or is parallel, repeat pit shaft connect high process with the hypomere pit shaft connect high to the road surface following 2.5 meters; Press the sinking stage computes convergence coefficient and the coefficient of stability in the well-sinking process, and according to result of calculation control subsidence velocity;
Cast-in-place concrete structure is adopted on the manhole basis in stage (3), the step the first that stage (3) comprises be when well-sinking to the existing drainage pipe at ordinary times, stop well-sinking and excavate the manhole basis, the basis diameter is than pit shaft external diameter 〉=0.1 meter, the degree of depth reaches 0.3 meter of existing drainage pipe crust below, the bottom, basis extends inwardly to 1/3 place of existing drainage pipe diameter, the secondth, abolish existing pipeline to 1/2 place, build the first floor concrete to following 0.05 meter of semicanal of existing gutter and make waterstop herein, with the gutter bar bending to the structure muscle of shaft location as the manhole basis, with the reinforcement foundation colligation together, build second layer concrete, finish the making on manhole basis;
The step the first that stage (4) comprises is that absolute altitude is flat to the existing drainage pipe at the bottom of the hypomere well-sinking, control absolute altitude in hypomere pit shaft upper end is roadbed absolute altitude place, and lay prefabricated well lid plate in hypomere pit shaft upper end, the area of cover plate is poor more than or equal to hypomere pit shaft section area and epimere pit shaft section area, and on the cover board directly carries out the construction of roadbed; The secondth, the roadbase construction exposed parts of back in hypomere pit shaft upper end that finish connects the epimere pit shaft to grade elevation, and with the upper end of well lid sealing epimere pit shaft, finishes the making of manhole.
2. the job practices of Submersed type inspection well according to claim 1 is characterized in that: under the groundwater table condition with higher, the described stage (2) be taked large open well precipitation around should be in the manhole position before enforcement; In the process of the step 4 well-sinking in stage (2), select for use to load or mud lubrication cover method reduces pit shaft side friction resistance.
3. the job practices of Submersed type inspection well is characterized in that:
Described Submersed type inspection well comprises the pit shaft of ground well lid and well lid below, the pit shaft below is existing drainage pipe, be cast with the basis between pit shaft lower end and the drainage pipe, the pit shaft lower end is cast for one with the upper end, basis, the basis diameter is greater than the pit shaft external diameter, the bottom, basis is positioned at existing drainage pipe crust below, and basic bottom extends inwardly to existing drainage pipe below; Described pit shaft adopts segmented being spliced of " F " shaped steel reinforced concrete pipe, and intersegmental interface is provided with rubber seal;
The job practices of Submersed type inspection well is successively by carrying out with the next stage:
(1) manhole position unwrapping wire
The step that this stage comprises at first is that axis and the absolute altitude that will have drainage pipe now draw survey to ground, measures the manhole position, emits cross hairs; Next is to add all around in the manhole position to treat that the open caisson tube sinks to controlling stake;
(2) pit shaft is measured and is sunk
The step the first that this stage comprises is on the outer wall for the treatment of the open caisson tube, with color lines sign altitude scale line, the elongated ejection axis of symmetry about outer wall simultaneously; The secondth, treating also to eject line of symmetry with the outer wall correspondence position on the open caisson tube inwall, and at the pre-buried hanging wire fall device of peak; The 3rd is to adopt the dry type sinking method to carry out the segmented sinking of pit shaft, vertically lays pit shaft according to aforementioned manhole measuring position, and " F " mouth down is as the basil of well-sinking; The 4th is in the well-sinking process, at any time grasp sinking pit shaft elevation with level gauge observation well outer wall altitude scale line, and adopt transit to prop up on two well point center lines or on the extended line, Observing axis is to line of symmetry control pit shaft left and right displacement, according to the bob of well inwall line and the axis of symmetry, check sinking pit shaft inclination situation, and carry out the pit shaft correction according to above-mentioned measurement result; In the well-sinking process, when the first segment pit shaft sinks to existing drainage pipe top, bird type rubber sealing collar is installed then, is coated 851 polyamine fat in this joint pit shaft end and film and wood lining is installed behind the rubber coating the 851 polyamine fat rubber of filming in one week of first segment pit shaft top, then laying the second pipe joint material carries out pit shaft and connects height, pit shaft connects high axis and pit shaft axis coincidence or parallel, and the repetition pit shaft connects high process and pit shaft connect high to the road surface; Press the sinking stage computes convergence coefficient and the coefficient of stability in the well-sinking process, and according to result of calculation control subsidence velocity;
(3) making of manhole basis and pit shaft and drainage pipe is communicated with
Cast-in-place concrete structure is adopted on the manhole basis in this stage, the step the first that stage (3) comprises be when well-sinking to the existing drainage pipe at ordinary times, stop well-sinking and excavate the manhole basis, the basis diameter is than pit shaft external diameter 〉=0.1 meter, the degree of depth reaches 0.3 meter of existing drainage pipe crust below, the bottom, basis extends inwardly to 1/3 place of existing drainage pipe diameter, the secondth, abolish existing pipeline to 1/2 place, build the first floor concrete to following 0.05 meter of semicanal of existing gutter and make waterstop herein, with the gutter bar bending to the structure muscle of shaft location as the manhole basis, with the reinforcement foundation colligation together, build second layer concrete, finish the making on manhole basis; With the upper end of well lid sealing pit shaft, finish the making of manhole at last.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102587374A (en) * | 2012-03-26 | 2012-07-18 | 江苏龙源振华海洋工程有限公司 | Perpendicularity control process for single-tubular-pile foundation of offshore intertidal wind farm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102864833A (en) * | 2012-10-10 | 2013-01-09 | 成张佳宁 | Application of finished plastic inspection well in outdoor drainage system |
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2008
- 2008-09-27 CN CN2008101414812A patent/CN101684669B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN102587374A (en) * | 2012-03-26 | 2012-07-18 | 江苏龙源振华海洋工程有限公司 | Perpendicularity control process for single-tubular-pile foundation of offshore intertidal wind farm |
| CN102587374B (en) * | 2012-03-26 | 2014-07-30 | 江苏龙源振华海洋工程有限公司 | Perpendicularity control process for single-tubular-pile foundation of offshore intertidal wind farm |
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