CN107503345A - A kind of deep water foundation pile foundation construction process - Google Patents

Abstract

The invention discloses a kind of deep water foundation pile foundation construction process, process are as follows：First, cofferdam construction；2nd, steel pile casting is transferred；3rd, cofferdam back cover is constructed；4th, drilled pile construction：More drilled piles are constructed respectively；Include step during to drilled pile construction：401st, draw hole drill to take：From top to bottom drilled through on solid rock residing for current institute's construction drill stake it is multiple draw hole, draw hole in vertically to lay and its quantity be 8~10, multiple holes of drawing include a multiple lateral opening and mesopore；402nd, drilled pile construction；403rd, step 401 is repeated several times to step 402, until completing the work progress of all drilled piles.The present invention is by multiple drawing hole from top to bottom being drilled through on solid rock residing for drilled pile, and the quantity for drawing hole and the installation position for respectively drawing hole are defined, solid rock is formed sieve hole to increase rock fracture face, can effectively solve the problems, such as because rock is hard, complete influence drilled pile drilling construction progress.

Description

A kind of deep water foundation pile foundation construction process

Technical field

The invention belongs to technical field of bridge construction, more particularly, to a kind of deep water foundation pile foundation construction process.

Background technology

With the development of national economy, China railways bridge cause fast development, China is in Bridge Design theory, construction skill Caught up with terms of art and equipment or close to advanced international standard, large span is over strait, crossing-fiver bridge construction is continuously increased.For master The deep water foundation that pier dimension of platform is 30.25m × 19.75m × 5m is the depth of railway engineering maximum volume on current cruiseway Water cushion cap foundation.Foundation in water construction is carried out using Double-Wall Steel Boxed Cofferdam to have applied as modern Longspan Bridge large volume deep water foundation The main method of work.Double-wall steel cofferdam construction need to adapt to different geology, navigation condition, the depth of water, basis volume and river flow velocity etc. Particular surroundings, under given conditions, especially for the depth of water compared with it is deep, casing volume is big, rocky bed needs underwater demolition to excavate, protect Barrier navigation, flood control-discharge dyke cause under the conditions of flow velocity is exceedingly fast etc., both ensured steel cofferdam design optimization, it is accurate sink in place, back cover it is tight Close, drilling platform is set up and the safe mass such as mass concrete construction meets to require, need to accelerate progress again, saving is constructed into This, is the key of project administrator and engineers and technicians' technical research, is the master of large span deepwater bridge construction technical research Offense to.Therefore, study of rocks riverbed ultra-large volume deep water foundation integrated biological pond system at present it is over strait, across river, bridge spanning the river Beam construction has very big directive significance.

When being constructed using steel cofferdam to the pile foundation of pier cushion cap in water (also referred to as underwater support table), because cushion cap is located at riverbed Below face, and riverbed intectate, it is exposed bedrock, along with drilled pile diameter is big in pile foundation and quantity is more, difficulty of construction It is larger, especially when in water drilled pile be located in solid rock, i.e., when the pile foundation rock of drilled pile is solid rock, drilled pile Drilling construction difficulty is very big.Solid rock refers to fresh complete, particle electrical connection and the rock for having higher mechanical strength, Refer generally to the rock that compressive ultimate strength under saturated-water phase is more than 50 kg/cms, as sedimentary rock, igneous rock, Metamorphic rock etc., solid rock have very high mechanical strength and very strong water-resistance.Especially pile foundation rock is especially hard, complete During whole solid rock, " reaming effect " is poor in boring procedure, causes tup to wear especially severe, it is average per drilling depth 20cm~ 30cm is both needed to weld a tup, and bit freezing phenomenon is also more, easily breaks and causes tup to scrap.

The content of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that provide a kind of deep water foundation Pile foundation construction process, by from top to bottom drilled through on solid rock residing for drilled pile it is multiple draw hole, and to draw hole quantity and The installation position for respectively drawing hole is defined, and solid rock residing for drilled pile is formed sieve hole to increase rock fracture face, can have Effect solves the problems, such as because rock it is hard, it is complete influence drilled pile drilling construction progress.

In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of deep water foundation pile foundation construction process, its It is characterised by：Constructed deep water foundation pile foundation includes the more drilled piles being supported to underwater support table, and the underwater support table is Use steel cofferdam construction molding for reinforced concrete pile cap；The steel cofferdam is supported on rocky bed, and the drilled pile is Below the horizontal cushion cap and in the heavily fortified point being in vertically to the reinforced concrete pile of laying, the drilled pile in rocky bed On hard rock；

When being constructed to constructed deep water foundation pile foundation, process is as follows：

Step 1: cofferdam construction：According to conventional sinking of cofferdam construction method, steel cofferdam is from top to bottom sunk down into the water At the construction location of middle cushion cap, and steel cofferdam is set to be supported on rocky bed；

Step 2: steel pile casting is transferred：According to conventional steel pile casting pay-off method, the steel pile casting used in construction drill stake is carried out Decentralization；

The quantity of installed steel pile casting is identical with the quantity of drilled pile, and multiple steel pile castings are respectively positioned in steel cofferdam, more The installation position of the individual steel pile casting corresponds with the installation position of the more drilled piles respectively；

Step 3: cofferdam back cover is constructed：Concrete sealing bottom, back cover are carried out to the steel cofferdam bottom to sink in step 1 in place The elevation of top of formed concrete sealing bottom layer is consistent with the elevation of bottom of the underwater support table afterwards；

Step 4: drilled pile construction：The more drilled piles are constructed respectively, the construction party of the more drilled piles Method all same；

When being constructed to any drilled pile, comprise the following steps：

Step 401, draw hole drill and take：Multiple draw what is from top to bottom drilled through on solid rock residing for current institute's construction drill stake Hole, it is described draw hole in vertically to lay and its quantity be 8~10；Draw hole described in multiple and be respectively positioned on current institute's construction drill stake Design stake holes in, multiple structure snd size all sames for drawing hole；Multiple holes of drawing are including multiple along the circumferential direction equal Lateral opening and a mesopore for being located at multiple lateral opening middle insides, the mesopore of even laying are located at current institute's construction drill stake Central axis on；

Draw hole described in multiple to be respectively positioned in the steel pile casting for current institute's construction drill stake of constructing, the steel pile casting and design Stake holes is laid in coaxial；

Step 402, drilled pile construction：Routinely in water drilled pile construction method, to current institute's construction drill stake carry out Construction；

Step 403, step 401 is repeated several times to step 402, until completing the work progress of all drilled piles.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：A diameter of Φ 2m~Φ 3m of the drilled pile, step Draw a diameter of Φ 80mm~Φ 120mm in hole described in rapid 401.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：Draw the bottom surface in hole described in step 401 higher than design The bottom surface of stake holes, the vertical distance between the bottom surface for drawing hole and the bottom surface for designing stake holes is 15cm~25cm.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：It is to use to be laid in brill to draw hole described in step 401 The vertical drilling of rig drilling shaping on the platform of hole, is institute between solid rock residing for the drilling platform and drilled pile State rig and be in the empty of idling conditions and bore section, the empty section of boring is the section using pipe-following drilling, it is described it is empty bore in section with The internal diameter for entering sleeve pipe is more than the diameter for drawing hole；

The drilling platform is to be erected in step 4 before drilled pile construction on the steel cofferdam to sink in step 1 in place Platform, the drilling platform is supported at the top of steel cofferdam；

Multiple trephination all sames for drawing hole in step 401, and multiple holes of drawing are distinguished to rear by elder generation Drilled through；

When drawing hole to any one using the rig and drilling through, empty brill is from top to bottom first carried out, until the brill The drill bit of hole equipment is contacted with solid rock, and sky is crept into during boring using conventional pipe-following drilling method, and the drilling is set It is standby to be in idling conditions；After the drill bit of the rig contacts with solid rock, using the rig from top to bottom Crept into solid rock, until completing the boring procedure for drawing hole；

Drilled pile construction is carried out in step 402, current institute's construction drill stake is constructed using the drilling platform.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：The empty internal diameter ratio for boring the sleeve pipe that followed up in section draws Big 40mm~the 100mm of diameter in hole.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：In step 2 steel pile casting decentralization after the completion of and step Before carrying out drilled pile construction in four, drilling platform is set up on the steel cofferdam that sinks in step 1 in place；

The drilling platform includes the lower support platform being supported on steel cofferdam and is supported in the lower support platform Upper support platform；The more drilled piles are laid in multiple rows of multiple row；Opened in the lower support platform and the upper support platform There are multiple through holes passed for steel pile casting, multiple steel pile castings are connected as one by casing attachment structure, and the casing connects Binding structure includes multiple lateral connection beams being laid in same level, all lateral connections in the casing attachment structure The multiple rows of multiple row of beam point is laid, and each lateral connection beam is laid along the length direction of steel cofferdam；Multiple steel pile castings are in Multiple rows of multiple row is laid, and often arranging the steel pile casting includes the steel pile casting that multiple length directions along steel cofferdam are laid from front to back, Often arrange in the steel pile casting and be attached between the top of the two neighboring steel pile casting by a lateral connection beam, is located at The one row steel pile casting of the leftmost side and in a row steel pile casting of the rightmost side each steel pile casting and steel cofferdam it Between be attached by a lateral connection beam；The lower support platform is supported in the casing attachment structure, under described Support platform includes the longeron that multiple tracks is laid in same level, longeron described in per pass and the perpendicular cloth of lateral connection beam If longeron described in per pass is supported on the row lateral connection beam；The upper support platform is in parallel laying including multiple tracks And the transverse distribution beam in same level is respectively positioned on, transverse distribution beam described in per pass is supported in described in multiple tracks on longeron；Institute It is in horizontal layout to state longeron, lateral connection beam and transverse distribution beam；

The multiple steel pile castings transferred in step 3 in place are connected as one by the casing attachment structure.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：The steel cofferdam is that underwater support table is constructed Cube steel jacket box, the cross section of the cube steel jacket box is rectangle, and the cube steel jacket box is divided into from the bottom to top It is multiple in vertically to the cofferdam section of laying, the cofferdam section in the cube steel jacket box positioned at bottommost is steel cofferdam Coxopodite；

When step 1 carries out cofferdam construction, comprise the following steps：

Step 101, steel cofferdam coxopodite are assembled：Four cofferdam wallboards of steel cofferdam coxopodite will be formed using welding equipment Equal assembly is integrated, and obtains the steel cofferdam coxopodite of assembled shaping；

Step 102, the transfer of steel cofferdam coxopodite：Steel cofferdam coxopodite described in step 101 is moved to using transfer device pre- At the construction location for the steel cofferdam first measured；

Step 103, steel cofferdam coxopodite sink：The steel cofferdam coxopodite moved into place in step 102 is sunk；

Step 104, the installation of upper cofferdam section and sinking：It will first be enclosed using hanging device described in the installation of a upper need Weir section is hung on the cofferdam section delivered to and currently sunk in place, and will be hung using welding equipment and sent cofferdam section to seal It is welded on the cofferdam section currently to have sunk in place, then to hanging all cofferdam given cofferdam section and be disposed below Section is synchronously sunk, and completes installation and the sinking watching of upper cofferdam section；

Step 105, one or many repeat steps 104, until completing the institute in steel cofferdam above steel cofferdam coxopodite There are installation and the sinking watching of cofferdam section, now steel cofferdam sinks down into design attitude, completes the sinking watching of steel cofferdam.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：The steel cofferdam coxopodite is supported on rocky bed On, the steel cofferdam coxopodite is assembled by four cofferdam wallboards, and four cofferdam wallboards are in vertically to laying and its knot Structure all same, the equal flush of height all same and its bottom of four cofferdam wallboards；

The hanging wallboard processing structure of the hanging wallboard section bottom of the steel cofferdam coxopodite, the hanging wallboard section is described The hanging wallboard section in bottom in the wallboard of cofferdam, it is hanging described in the quantity and steel cofferdam coxopodite of the hanging wallboard processing structure The quantity of wallboard section is identical；

Each hanging wallboard Duan Jun is divided into multiple hanging wall plate segments from front to back, and the hanging wall plate segment is square Shape；Each hanging wallboard processing structure is laid outstanding from front to back including multiple contour lines along the hanging wallboard section Empty wallboard section processing structure, each hanging wall plate segment processing structure are laid in a hanging wall plate segment On；

The hanging wall plate segment processing structure is board plug type processing structure or special-shaped block and plate combined type processing structure； The board plug type processing structure includes multiple the first plates for being laid in the hanging wall plate segment bottom outside from front to back, more Individual first plate is in be inserted vertically to laying, the bottom of each first plate to rocky bed；It is described different Shape block and plate combined type processing structure include being connected to the special-shaped block of the hanging wall plate segment bottom and it is multiple from front to back The second plate being laid on the outside of special-shaped block, multiple second plates in vertically to laying, each second plate Bottom is inserted to rocky bed, and the special-shaped block is to be laid in immediately below the hanging wall plate segment and in vertically to laying Plugging plate, the lateral wall of the plugging plate is connected the lateral wall flush of hanging wall plate segment with it, the plugging plate Cross-sectional structure and size connects the cross-sectional structure of hanging wall plate segment with it and size is identical；First plate and Second plate is embedded steel board, and the embedded steel board is elongate steel plate；

All embedded steel boards of each hanging wallboard processing structure are respectively positioned on same vertical plane, each embedded steel board It is in parallel laying with the hanging wall plate segment that it is laid, all embedded steel boards in each hanging wallboard processing structure are equal Outside-supporting barrier is formed, the outside-supporting barrier is in vertically to laying；Bottom is provided with the inside of the outside-supporting barrier Portion's plugging structure, the bottom plugging structure are the plugging structure blocked to the outside-supporting barrier, the bottom envelope Bridging structure is between steel cofferdam and rocky bed；

When steel cofferdam coxopodite assembly is carried out in step 101, all special-shaped blocks that need to be connected are weldingly fixed on steel cofferdam Coxopodite bottom, obtain the steel cofferdam coxopodite of assembled shaping and bottom belt special-shaped block；

In step 105 institute's construction steel sinking of cofferdam in place after, also need will be needed on steel cofferdam coxopodite installation all embedded steel boards Sinking is inserted into place and on the steel cofferdam coxopodite of bottom belt special-shaped block, and each embedded steel board bottom is supported in rocky bed On, obtain the outside-supporting barrier of construction molding；The bottom closure of being constructed again on the inside of the outside-supporting barrier is tied Structure, blocked by outside-supporting barrier described in the bottom plugging structure.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：Bottom is supported in rock river in the cofferdam wallboard Wallboard section on bed is bottom supporting walls plate segment, and the bottom of the bottom supporting walls plate segment carries cutting shoe, the bottom Blocked between supporting walls plate segment bottom and rocky bed by cutting shoe, the thickness of the cutting shoe from top to bottom gradually contracts It is small；

The hanging wall plate segment is low hanging wall plate segment or high hanging wallboard section, is laid in the low hanging wallboard The hanging wallboard processing structure on section is the board plug type processing structure, is laid on the high hanging wallboard section The hanging wallboard processing structure is the special-shaped block and plate combined type processing structure；

The type of each hanging wall plate segment is all in accordance with the hanging wall plate segment bottom and the rock immediately below it Vertical distance between stone river bed is judged：With being located at immediately below it at the hanging wall plate segment bottom any position For vertical distance between rocky bed no more than H1max, the hanging wall plate segment is the low hanging wall plate segment；It is no Then, the hanging wall plate segment is the high hanging wallboard section；Wherein, H1max=180cm~220cm；

Vertical distance at any position of the plugging plate bottom between the rocky bed immediately below it is little In H2max；Wherein, H2max=250cm~350cm.

A kind of above-mentioned deep water foundation pile foundation construction process, it is characterized in that：The plugging plate and outside are laid with the first plate The hanging wall plate segment be that plate lays plate, the plate lay be provided with from front to back on plate it is multiple respectively for described The pick-and-place components of embedded steel board inserting, the pick-and-place components are in vertically to laying；Each pick-and-place components include being located at the plate cloth If the structure of the lower slot of plate bottom outside and the upper slot directly over the lower slot, the upper slot and lower slot and Size all same and both at concave shape plugboard trough, the concave shape plugboard trough are fixed on the lateral wall that the plate lays plate On；

The bottom plugging structure includes sandbag plugging structure and the splash guard mated formation on the inside of the sandbag plugging structure； The sandbag plugging structure includes the vertical block wall that multiple gaps between the two neighboring embedded steel board are blocked, institute State vertical block wall to be supported between the plate laying plate and rocky bed, arbitrary neighborhood two in the outside-supporting barrier Blocked between the embedded steel board by a vertical block wall；The splash guard bottom is laid in inserts positioned at described Plate is laid on the rocky bed below plate, and the plate is fixed at the top of the splash guard and is laid on plate；The vertical block wall For the block wall being piled into from the bottom to top by multiple sandbags.

The present invention has advantages below compared with prior art：

1st, method and step is simple, easy construction and efficiency of construction are high, and the manpower and materials of input are few.

2nd, use that the structure of hanging wallboard processing structure is simple, reasonable in design and processing and fabricating is easy, input cost compared with Low, the hanging wallboard processing structure easy construction and efficiency of construction are high, and the manpower and materials of input are few.

3rd, used hanging wallboard processing structure using effect is good and practical value is high, can effectively solve steel cofferdam bottom Hanging problem, by using board plug type processing structure or special-shaped block and plate combined type processing structure in hanging wall plate segment bottom Successfully solve the hanging problem of steel cofferdam bottom, and carried out under water using bottom plugging structure (i.e. anchor bar of waterproof plate in tunnels and sandbag) Closure, has saved construction cost, has accelerated construction speed.Thus, hanging wallboard processing structure can reduce excavation of foundation pit side as far as possible Amount, steel cofferdam bottom adaptation to the ground can effectively change, design optimized to steel cofferdam structure, successfully solves steel cofferdam bottom Hanging problem, has saved construction cost, accelerates construction speed.Using hanging wallboard processing structure to the hanging wallboard section of steel cofferdam Section bottom is effectively treated, and the hanging wallboard processing structure adapts to the topography variation in riverbed, and combines bottom plugging structure Blocked under water, can solve the hanging problem in steel cofferdam bottom.

4th, drilled pile construction method is simple, reasonable in design and easy construction, and input cost is low, by hard residing for drilled pile From top to bottom drilled through on hard rock it is multiple draw hole, and the quantity for drawing hole and the installation position for respectively drawing hole are defined, make drilling Solid rock residing for stake forms sieve hole to increase rock fracture face, can effectively solve because rock is hard, completely influences drilled pile The problem of drilling construction progress.

5th, used drilling platform is simple in construction, reasonable in design and input cost is low, and convenient disassembly, the drilling platform is taken If convenient, input manpower and materials are less.

6th, used drilling platform using effect is good, Double-Wall Steel Boxed Cofferdam and all steel shield in Double-Wall Steel Boxed Cofferdam Cylinder is connected as one by casing attachment structure, and the combined type support platform of upper and lower two support platforms composition is supported in In casing attachment structure, casing attachment structure is direct load-carrying members, and the stability of Double-Wall Steel Boxed Cofferdam and steel pile casting can obtain It is effectively ensured, overall structure is simple, firm and dismounting is easy.Carried out using the present invention in work progress, Double-Wall Steel Boxed Cofferdam and steel The position of casing is not susceptible to move, and construction speed and construction quality can be effectively ensured.

7th, using effect is good and popularizing application prospect is extensive, by from top to bottom being drilled through on solid rock residing for drilled pile It is multiple to draw hole, and the quantity for drawing hole and the installation position for respectively drawing hole are defined, solid rock residing for drilled pile is formed sieve Sub-aperture to increase rock fracture face, can effectively solve the problems, such as because rock it is hard, it is complete influence drilled pile drilling construction progress, energy Simplicity, it is rapidly completed deep water foundation pile foundation construction process.

Below by drawings and examples, technical scheme is described in further detail.

Brief description of the drawings

Fig. 1 is the process flow diagram of the present invention.

Fig. 1-1 is the structural representation of steel cofferdam of the present invention.

Fig. 2 is the planar structure schematic diagram of the hanging wallboard processing structure of the present invention.

Fig. 3 is the use state reference chart of bottom plugging structure of the present invention.

Fig. 4 is the facade structures schematic diagram of the hanging wallboard processing structure in present invention right side.

Fig. 5 is the facade structures schematic diagram of the hanging wallboard processing structure of present invention rear side.

Fig. 6 is the structural representation of supporting walls plate segment in bottom of the present invention.

Fig. 7 is the inserting view of I-steel of the present invention and concave shape plugboard trough.

Fig. 8 is the layout position illustration that the present invention draws hole.

Fig. 9 is the layout position illustration of drilled pile of the present invention.

Figure 10 is the planar structure schematic diagram of drilling platform of the present invention.

Figure 11 is the facade structures schematic diagram of drilling platform of the present invention.

Description of reference numerals:

1-steel cofferdam coxopodite；1-1-inside panel；1-2-exterior panel；

1-3-sub-truss；1-4-steel cofferdam；2-the first plate；

3-special-shaped block；4-the second plate；5-rocky bed；

6-cutting shoe；7-concave shape plugboard trough；7-1-steel pile casting；

8-vertical block wall；9-splash guard；10-sandbag；

11-concrete sealing bottom layer；12-skewed horizontal load part；13-midfoot support part；

14-I-steel；15-underwater foundation ditch；16-2-transportation by driving ship；

16-3-longitudinally connected beam；16-4-ship；16-5-windlass；

16-6-oblique stiff girder；17-drilled pile；

18-solid rock；19-design stake holes；20-draw hole；

20-1-steel sleeve 21-lateral connection beam；22-longeron；

23-transverse distribution beam；24-longitudinally connected beam；25-plane steel plate；

26-guard rail；27-lower connecting cross beam；28-limiting card.

Embodiment

A kind of deep water foundation pile foundation construction process as shown in Figure 1, with reference to Fig. 1-1, Fig. 8 and Fig. 9, deep water foundation of constructing Pile foundation includes the more drilled piles 17 being supported to underwater support table, and the underwater support table is using steel cofferdam 1-4 construction moldings For reinforced concrete pile cap；The steel cofferdam 1-4 is supported on rocky bed 5, and the drilled pile 17 is positioned at the level Below cushion cap and in the solid rock 18 being in vertically to the reinforced concrete pile of laying, the drilled pile 17 in rocky bed 5 On；

When being constructed to constructed deep water foundation pile foundation, process is as follows：

Step 1: cofferdam construction：According to conventional sinking of cofferdam construction method, steel cofferdam 1-4 is from top to bottom sunk down into institute State at the construction location of underwater support table, and steel cofferdam 1-4 is supported on rocky bed 5；

Step 2: steel pile casting is transferred：According to conventional steel pile casting pay-off method, to the steel pile casting used in construction drill stake 17 7-1 is transferred；

Installed steel pile casting 7-1 quantity is identical with the quantity of drilled pile 17, and multiple steel pile casting 7-1 are respectively positioned on steel In the 1-4 of cofferdam, multiple steel pile casting 7-1 installation position a pair of the installation position 1 with the more drilled piles 17 respectively Should；

Step 3: cofferdam back cover is constructed：Concrete sealing bottom is carried out to the steel cofferdam 1-4 bottoms to sink in step 1 in place, The elevation of top that concrete sealing bottom layer 16 is formed after back cover is consistent with the elevation of bottom of the underwater support table；

Step 4: drilled pile construction：The more drilled piles 17 are constructed respectively, more drilled piles 17 are applied Work method all same；

When being constructed to any drilled pile 17, comprise the following steps：

Step 401, draw hole drill and take：It is more from top to bottom being drilled through on solid rock 18 residing for current institute's construction drill stake 17 Individual to draw hole 20, the hole 20 of drawing is in vertically to laying and its quantity is 8~10；Draw hole 20 described in multiple to be respectively positioned on currently In the design stake holes 19 of institute's construction drill stake 17, multiple structure snd size all sames for drawing hole 20, Fig. 8 is referred to；Multiple institutes State and draw hole 20 and include multiple along the circumferential direction uniformly lay lateral opening and the mesopores positioned at multiple lateral opening middle insides, The mesopore is located on the central axis of current institute's construction drill stake 17；

Draw hole 20 described in multiple to be respectively positioned in the steel pile casting 7-1 for current institute's construction drill stake 17 of constructing, the steel shield Cylinder 5 is laid with design stake holes 19 in coaxial；

Step 402, drilled pile construction：Routinely in water drilled pile construction method, current institute's construction drill stake 17 is entered Row construction；

Step 403, step 401 is repeated several times to step 402, until completing the work progress of all drilled piles 17.

Wherein, the design stake holes 19 of the drilled pile is the stake holes for the drilled pile being pre-designed.

During practice of construction, a diameter of Φ 2m~Φ 3m of the drilled pile, a diameter of of hole 20 is drawn described in step 401 Φ 80mm~Φ 120mm.Also, the level interval between the lateral opening hole wall with designing stake holes 19 is 25cm~35cm.

In the present embodiment, a diameter of Φ 2.5m of the drilled pile, the quantity for drawing hole 20 is 10 and its is a diameter of Φ 100mm, the lateral opening level interval between the hole wall of design stake holes 19 is 30cm.

, can according to specific needs, to drawing the quantity in hole 20, drawing the diameter in hole 20 and described lateral opening during practice of construction The level interval between hole wall with designing stake holes 19 adjusts accordingly.

Draw the bottom surface of the bottom surface higher than design stake holes 19 in hole 20, the bottom surface for drawing hole 20 and design described in step 401 Vertical distance between the bottom surface of stake holes 19 is 15cm~25cm.

In the present embodiment, the vertical distance between the bottom surface for drawing hole 20 and the bottom surface for designing stake holes 19 is 20cm.It is real When border is constructed, phase can be carried out to drawing the vertical distance between bottom surface of the bottom surface in hole 20 with designing stake holes 19 according to specific needs It should adjust.

Draw in the present embodiment, described in step 401 hole 20 be using be laid on drilling platform rig drilling into The vertical drilling of type, it is that the rig is in idling conditions between solid rock 18 residing for the drilling platform and drilled pile It is empty bore section, the empty section of boring is the section using pipe-following drilling, and the empty internal diameter for boring the sleeve pipe that followed up in section, which is more than, draws hole 20 Diameter；

The drilling platform is to be erected on the steel cofferdam 1-4 to sink in step 1 in place before drilled pile construction in step 4 On platform, the drilling platform is supported at the top of steel cofferdam 1-4；

Multiple trephination all sames for drawing hole 20 in step 401, and described draw hole 20 to multiple to rear by elder generation Drilled through respectively；

When drawing hole 20 to any one using the rig and drilling through, empty brill is from top to bottom first carried out, until described The drill bit of rig is contacted with solid rock 18, and sky is crept into during boring using conventional pipe-following drilling method, the brill Hole equipment is in idling conditions；After the drill bit of the rig contacts with solid rock 18, using the rig by Crept under up in solid rock 18, until completing the boring procedure for drawing hole 20；

Drilled pile construction is carried out in step 402, current institute's construction drill stake 17 is applied using the drilling platform Work.

Wherein, the empty section of boring is to carry out empty brill using conventional pipe-following drilling method.

The internal diameter of follow-up sleeve pipe is bigger 40mm~100mm than the diameter for drawing hole 20 in the empty brill section.

Also, the drilling rod of follow up sleeve pipe and the rig is laid in coaxial.

As shown in the above, sleeve pipe follow-up length is the scar of solid rock 18 residing for drilled pile and the drilling platform Between vertical spacing, and sleeve pipe follow-up length is the empty length for boring section, using follow-up sleeve pipe and by the internal diameter for the sleeve pipe that follows up The setting effect bigger 40mm~100mm than drawing the diameter in hole 20, it is as follows：Firstth, the drilling rod of rig is oriented to；The 2nd, drilling rod can effectively be protected；3rd, the rigidity and perpendicularity of drilling rod can be effectively increased；4th, it is convenient to take out solid rock drilling During core；4th, it can effectively prevent aperture collapse hole and debris falls into drilling and causes bit freezing.Meanwhile

During practice of construction, lift and transfer in place after steel cofferdam decentralization in place, then by steel pile casting 7-1, the steel Cofferdam and steel pile casting 7-1 are supported in residing for drilled pile on solid rock 18；Afterwards, at the top of the steel cofferdam transferred in place The drilling platform is set up, the steel pile casting 7-1 tops are extend out to above the drilling platform, and confession is provided with the drilling platform The through hole that steel pile casting 7-1 is passed；After the completion for the treatment of that the drilling platform is set up, the drilling is installed on the drilling platform and set It is standby, from top to bottom drilled through on solid rock residing for drilled pile 18 by the rig it is multiple draw hole 20, using the brill When hole equipment is drawn hole 20 to any one and is drilled with, empty brill is from top to bottom first carried out, until the drill bit and brill of the rig Solid rock 18 is contacted residing for the stake of hole, and sky is crept into during boring using conventional pipe-following drilling method, at the rig In idling conditions；After the rig drill bit with after solid rock 18 contacts residing for drilled pile, using the rig From top to bottom crept into solid rock residing for drilled pile 18, until the boring procedure for drawing hole 20 is completed, in drilled pile institute Locate in solid rock 18 in drilling process, do not follow up sleeve pipe.

In the present embodiment, follow-up sleeve pipe is steel sleeve 20-1.

In the present embodiment, the rig is geological drilling rig, the geological drilling rig model：XY-200 type rigs, follow-up set The internal diameter of pipe is Φ 150mm.During practice of construction, the internal diameter for the sleeve pipe that follows up can be adjusted accordingly according to specific needs.

In the present embodiment, before carrying out drilled pile construction in step 2 after the completion of steel pile casting decentralization and in step 4, in step Drilling platform is set up on the steel cofferdam 1-4 to sink in rapid one in place；

As shown in Figure 10, Figure 11, the drilling platform includes the lower support platform being supported on steel cofferdam 1-4 and is supported in Upper support platform in the lower support platform；The more drilled piles 17 are laid in multiple rows of multiple row；The lower support platform and Multiple through holes passed for steel pile casting 7-1 are provided with the upper support platform, multiple steel pile castings 17 are connected by casing Structure connects as one, and the casing attachment structure includes multiple lateral connection beams 21 being laid in same level, described All lateral connection beams 21 in casing attachment structure divide multiple rows of multiple row to lay, and each lateral connection beam 21 encloses along steel Weir 1-4 length direction is laid；Multiple steel pile castings 17 are laid in multiple rows of multiple row, often arrange the steel pile casting 17 including multiple The steel pile casting 17 laid from front to back along steel cofferdam 1-4 length direction, often arrange the two neighboring steel in the steel pile casting 17 It is attached between the top of casing 17 by a lateral connection beam 21, the row He of steel pile casting 17 positioned at the leftmost side Each connected in a row steel pile casting 17 of the rightmost side between the steel pile casting 17 and steel cofferdam 1-4 by a transverse direction Beam 21 is connect to be attached；The lower support platform is supported in the casing attachment structure, and the lower support platform includes multiple tracks The longeron 22 being laid in same level, longeron 22 described in per pass and the perpendicular laying of lateral connection beam 21, described in per pass Longeron 22 is supported on the row lateral connection beam 21；The upper support platform includes multiple tracks in parallel laying and is respectively positioned on Transverse distribution beam 23 in same level, transverse distribution beam 23 described in per pass are supported in described in multiple tracks on longeron 22；It is described Longeron 22, lateral connection beam 21 and transverse distribution beam 23 are in horizontal layout；

The multiple steel pile casting 7-1 transferred in step 3 in place are connected as one by the casing attachment structure.

It is logical between the bottom of longeron 22 described in per pass and each lateral connection beam 21 supported in the present embodiment Cross multiple limiting cards 28 to be fixedly connected, the length direction of multiple limiting cards 28 transversely tie-beam 21 enters from front to back Row is laid.

Transverse distribution beam 23 described in per pass between each transverse distribution beam 23 in the upper support platform by passing through Limiting card 28 is fixedly connected.

In the present embodiment, the casing attachment structure also includes multiple lower connecting cross beams being laid in same level 27, multiple lower connecting cross beams 27 divide multiple rows of multiple row to lay, and each lower connecting cross beam 27 is along the length of Double-Wall Steel Boxed Cofferdam Spend direction to lay, the lower connecting cross beam 27 is in parallel laying with lateral connection beam 21, and each lateral connection beam 21 is just Lower section is provided with a lower connecting cross beam 27；Often arrange in the steel pile casting 7-1 in the two neighboring steel pile casting 7-1 It is attached between top by a lower connecting cross beam 27, positioned at the row steel pile casting 7-1 of the leftmost side and positioned at most It is each horizontal by being connected under one between the steel pile casting 7-1 and Double-Wall Steel Boxed Cofferdam in the one row steel pile casting 7-1 on right side Beam 27 is attached.

The longeron 22 together positioned at the leftmost side is left-hand stringer, and the left bottom of the left-hand stringer is supported in double-walled On steel cofferdam, the longeron 22 together positioned at the rightmost side be right-hand stringer, and the bottom right side of the right-hand stringer is supported in pair On wall steel cofferdam.Pass through the length direction along longeron 22 between the left-hand stringer and the right-hand stringer and Double-Wall Steel Boxed Cofferdam The multiple limiting cards 28 laid from front to back are fixedly connected.

In the present embodiment, the longeron 22 is Bailey beam.

During practice of construction, the longeron 22 can also use other types of support beam.

In the present embodiment, the casing attachment structure top and Double-Wall Steel Boxed Cofferdam top flush, longeron 22 described in per pass Both ends be supported on Double-Wall Steel Boxed Cofferdam.

It is avris longeron to be located at the longeron 22 of the leftmost side and the longeron 22 positioned at the rightmost side in the casing attachment structure, The outside of the avris longeron is supported on Double-Wall Steel Boxed Cofferdam.

In the present embodiment, the casing attachment structure also includes the longitudinally connected beam that multiple tracks is laid in same level 24, longitudinally connected beam 24 described in multiple tracks divides multiple rows of multiple row to lay, and longitudinally connected beam 24 described in per pass is in lateral connection beam 21 Vertical runs；By longitudinally connected together between two neighboring steel pile casting 7-1 top in steel pile casting 7-1 described in each column Beam 24 is attached, and is arranged positioned at steel pile casting 7-1 most described in a row of front side and positioned at the one of most rear side every in the steel pile casting 7-1 Longitudinally connected beam 24 is attached the individual steel pile casting 7-1 together between Double-Wall Steel Boxed Cofferdam.

Also, the longitudinally connected beam 24 is in horizontal layout, and longitudinally connected beam 24 described in multiple tracks with laterally connecting described in multiple tracks Beam 21 is connect to be laid in same level.

In the present embodiment, the lateral connection beam 21 and longitudinally connected beam 24 are I-steel.

During practice of construction, the lateral connection beam 21 and longitudinally connected beam 24 can also use other types of shaped steel.

Meanwhile the drilling platform is also including the plane steel plate 25 being erected in the upper support platform, the flat steel Plate 25 is in horizontal layout and is provided with multiple through holes passed for steel pile casting 7-1 thereon.

Multiple through holes for being passed for the steel pile casting 7-1 of construction drill stake 2 are provided with the plane steel plate 25.

In the present embodiment, the drilling platform also includes being laid in the guard rail 26 on the outside of the upper support platform surrounding.

During practice of construction, after steel cofferdam 1-4 and steel pile casting 7-1 are transferred in place, drilling platform is set up, Process is as follows：First the casing attachment structure is set up, then the lower support platform is set up in the casing attachment structure, Finally support platform on described is set up in the lower support platform.The upper support platform forms with the lower support platform Combined type support platform, the combined type support platform are supported in casing attachment structure, and casing attachment structure is direct load-bearing knot Structure, all steel pile castings due to Double-Wall Steel Boxed Cofferdam and in Double-Wall Steel Boxed Cofferdam are connected as one by casing attachment structure Body, thus casing attachment structure, Double-Wall Steel Boxed Cofferdam and all steel pile casting 7-1 entirety stress in steel cofferdam 1-4, and Born active force is transferred to steel cofferdam 1-4 and steel pile casting 7-1, steel cofferdam 1-4 and steel pile casting 7-1 again after casing attachment structure Stability can be effectively ensured, steel cofferdam 1-4 and steel pile casting 7-1 position is not susceptible to move in work progress, Construction speed and construction quality can be effectively ensured.

In the present embodiment, the steel cofferdam 1-4 is the cube steel jacket box constructed to underwater support table, the cube The cross section of steel jacket box is rectangle, and the cube steel jacket box is divided into multiple in vertically to the cofferdam section of laying from the bottom to top Section, the cofferdam section in the cube steel jacket box positioned at bottommost is steel cofferdam coxopodite 1；

When step 1 carries out cofferdam construction, comprise the following steps：

Step 101, steel cofferdam coxopodite are assembled：Four cofferdam walls of steel cofferdam coxopodite 1 will be formed using welding equipment The equal assembly of plate is integrated, and obtains the steel cofferdam coxopodite 1 of assembled shaping；

Step 102, the transfer of steel cofferdam coxopodite：Steel cofferdam coxopodite described in step 101 1 is moved to using transfer device pre- At the steel cofferdam 1-4 first measured construction location；

Step 103, steel cofferdam coxopodite sink：The steel cofferdam coxopodite 1 moved into place in step 102 is sunk；

Step 104, the installation of upper cofferdam section and sinking：It will first be enclosed using hanging device described in the installation of a upper need Weir section is hung on the cofferdam section delivered to and currently sunk in place, and will be hung using welding equipment and sent cofferdam section to seal It is welded on the cofferdam section currently to have sunk in place, then to hanging all cofferdam given cofferdam section and be disposed below Section is synchronously sunk, and completes installation and the sinking watching of upper cofferdam section；

Step 105, one or many repeat steps 104, until completing in steel cofferdam 1-4 positioned at the top of steel cofferdam coxopodite 1 All cofferdam sections installation and sinking watching, now steel cofferdam 1-4 sink down into design attitude, complete under steel cofferdam 1-4 Heavy process.

As shown in figure 9, the more drilled piles 17 divide multiple rows of multiple row to be laid.

In the present embodiment, the quantity of the drilled pile 17 is 24, and 24 drilled piles 17 divide 4 rows 6 to arrange laying, and And 24 drilled piles 17 are in uniformly laying.

Due to using steel cofferdam 1 to pier cushion cap (hereinafter referred to as underwater support table) is constructed in water when, need first by steel cofferdam 1 On decentralization to riverbed.Because riverbed face has out-of-flatness, there is hanging phenomenon, makes leak stopping on the outside of cofferdam can not in the bottom of steel cofferdam 1 Implement, bring extreme difficulties to the construction of cofferdam bottom concrete, directly affect whether steel cofferdam back cover succeeds.Further, since steel The underwater drilling and blasting excavation method of underwater support table foundation ditch generally use, construction process requirement there must be ultra-deep and surpass residing for cofferdam 1 Phenomenon is dug, causes substrate out-of-flatness and rock unconsolidated formation be present, it is high to steel cofferdam leak stopping, concrete sealing bottom quality requirement.And tie Close cushion cap bottom design absolute altitude, it usually needs first Blasting Excavation supplies the foundation ditch that steel cofferdam is placed on riverbed face, if passing through intensification The Blasting Excavation depth of steel cofferdam bottom foundation ditch solves the hanging problem in the bottom of steel cofferdam 1, and the total height of steel cofferdam 1 also needs phase It should increase, and excavation of foundation pit workload increases, and can so greatly increase cost, while construction period is longer.Thus, need to be to steel The polycrystalline substance in cofferdam 1 is accordingly improved, and specifically sets up hanging wallboard processing structure.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 5, the steel cofferdam coxopodite 1 is supported on 5 on rocky bed, institute It is assembled by four cofferdam wallboards to state steel cofferdam coxopodite 1, four cofferdam wallboards in vertically to lay and its structure it is equal It is identical, the equal flush of height all same and its bottom of four cofferdam wallboards；

The hanging wallboard processing structure of the hanging wallboard section bottom of the steel cofferdam coxopodite 1, the hanging wallboard section is institute The hanging wallboard section in bottom in the wallboard of cofferdam is stated, described in the quantity and steel cofferdam coxopodite 1 of the hanging wallboard processing structure The quantity of hanging wall plate segment is identical；

Each hanging wallboard Duan Jun is divided into multiple hanging wall plate segments from front to back, and the hanging wall plate segment is square Shape；Each hanging wallboard processing structure is laid outstanding from front to back including multiple contour lines along the hanging wallboard section Empty wallboard section processing structure, each hanging wall plate segment processing structure are laid in a hanging wall plate segment On；

The hanging wall plate segment processing structure is board plug type processing structure or special-shaped block and plate combined type processing structure； The board plug type processing structure includes multiple the first plates 2 for being laid in the hanging wall plate segment bottom outside from front to back, Multiple first plates 2 are in be inserted to rocky bed 5 to laying, the bottom of each first plate 2 vertically；Institute Stating special-shaped block and plate combined type processing structure includes being connected to the special-shaped block 3 of the hanging wall plate segment bottom and multiple by preceding It is laid in second plate 4 in the outside of special-shaped block 3 after, multiple second plates 4 are in vertically to laying, and each described second The bottom of plate 4 is inserted to rocky bed 5, and the special-shaped block 3 is to be laid in immediately below the hanging wall plate segment and be in Vertically the lateral wall flush of hanging wall plate segment, institute are connected to the plugging plate of laying, the lateral wall of the plugging plate with it State the cross-sectional structure of plugging plate and size connects the cross-sectional structure of hanging wall plate segment with it and size is identical；It is described First plate 2 and the second plate 4 are embedded steel board, and the embedded steel board is elongate steel plate；

All embedded steel boards of each hanging wallboard processing structure are respectively positioned on same vertical plane, each embedded steel board It is in parallel laying with the hanging wall plate segment that it is laid, all embedded steel boards in each hanging wallboard processing structure are equal Outside-supporting barrier is formed, the outside-supporting barrier is in vertically to laying；Bottom is provided with the inside of the outside-supporting barrier Portion's plugging structure, the bottom plugging structure are the plugging structure blocked to the outside-supporting barrier, the bottom envelope Bridging structure is between steel cofferdam 1-4 and rocky bed 5；

When steel cofferdam coxopodite assembly is carried out in step 101, all special-shaped blocks 3 that need to be connected are weldingly fixed on steel cofferdam The bottom of coxopodite 1, obtain the steel cofferdam coxopodite 1 of assembled shaping and bottom belt special-shaped block 3；

After institute's construction steel cofferdam 1-4 sinks in place in step 105, also need that all steel of installation will be needed on steel cofferdam coxopodite 1 Plate is inserted into sinking in place and on the steel cofferdam coxopodite 1 of bottom belt special-shaped block 3, and each embedded steel board bottom is supported in On rocky bed 5, the outside-supporting barrier of construction molding is obtained；Constructed again on the inside of the outside-supporting barrier bottom Portion's plugging structure, blocked by outside-supporting barrier described in the bottom plugging structure.

Wherein, the rocky bed 5 refers to that riverbed is basement rock.

In the present embodiment, the structure of the special-shaped block 3 it is identical with the structure of the cofferdam wallboard, in particular to：It is described different Plate construction is identical used by shape block 3 and the cofferdam wallboard.But the shape of the special-shaped block 3 and the cofferdam wallboard It is different with size.

In the present embodiment, the quantity of the hanging wallboard section is two, and two hanging wallboard sections are divided into encloses positioned at steel The hanging wallboard section of the hanging wallboard section of rear side and right side in weir 1-4 rear side wall panel and right side wall panel, wherein, the hanging wallboard of rear side The structure of the hanging wallboard processing structure of section refers to Fig. 5, the structure of the hanging wallboard processing structure in right side of the hanging wallboard section in right side Refer to Fig. 4.

As shown in figure 3, the hanging wall plate segment that the plugging plate and outside are laid with the first plate 2 is plate cloth If plate, the bottom plugging structure includes sandbag plugging structure and the splash guard 9 mated formation on the inside of the sandbag plugging structure；Institute Stating sandbag plugging structure includes the vertical block wall 8 that multiple gaps between the two neighboring embedded steel board are blocked, institute State vertical block wall 8 to be supported between the plate laying plate and rocky bed 5, arbitrary neighborhood two in the outside-supporting barrier Blocked between the individual embedded steel board by a vertical block wall 8；The bottom of splash guard 9 is laid in positioned at institute State on the rocky bed 5 that plate is laid below plate, the top of splash guard 9 is fixed on the plate and laid on plate；It is described vertical Block wall 8 is the block wall being piled into from the bottom to top by multiple sandbags 10.

During actual progress bottom plugging structure construction, first the sandbag plugging structure is constructed, then in construction molding The sandbag plugging structure on the inside of mat formation splash guard 9, complete the work progress of the bottom plugging structure.

During actual use, pass through the gap between the vertical block wall 8 embedded steel board adjacent thereto to special-shaped block 3 Blocked.Also, the gap between the two neighboring hanging wallboard processing structure is carried out by the vertical block wall 8 Closure.

The madial wall of the splash guard 9 and the sandbag plugging structure abuts.

In the present embodiment, the lateral wall of the vertical block wall 7 abuts with the outside-supporting barrier.

Institute's construction steel cofferdam 1 is single-wall steel cofferdam or Double-Wall Steel Boxed Cofferdam.The cofferdam wallboard of the single-wall steel cofferdam is individual layer Plate.

In the present embodiment, institute's construction steel cofferdam 1 is Double-Wall Steel Boxed Cofferdam；

Each cofferdam section is that four cofferdam wallboards are spliced, and the cofferdam wallboard is the vertical wallboard； The vertical wallboard by inside panel 1-1, be laid in the outside of inside panel 1 and with inside panel 1 in the exterior panel 1-2 of parallel laying and The inner supporting structure being laid between inside panel 1-1 and exterior panel 1-2 is assembled；

The structure of the plugging plate is identical with the structure of the vertical wallboard；

The hanging wall plate segment that the plugging plate and outside are laid with the first plate 2 is that plate lays plate, described Plate lays inside panel 1-1 bottoms and the exterior panel 1-2 bottoms flush of plate, and the vertical block wall 8 is supported in the plate Below the exterior panel 1-2 for laying plate.

In the present embodiment, as shown in figure 1, the steel cofferdam 1 is Double-Wall Steel Boxed Cofferdam, the inside panel 1-1 and exterior panel 1- 2 be rectangle and both at vertical steel plate, and the inner supporting structure is to be connected between inside panel 1-1 and exterior panel 1-2 Sub-truss 1-3.

Also, the Double-Wall Steel Boxed Cofferdam is double-walled steel jacket box.

In the present embodiment, the structure of plugging plate described in the Double-Wall Steel Boxed Cofferdam is identical with the structure of the cofferdam wallboard； Plate described in the Double-Wall Steel Boxed Cofferdam lays inside panel 1-1 bottoms and the exterior panel 1-2 bottoms flush of plate, described vertical Block wall 7 is supported in the plate and laid below the exterior panel 1-2 of plate.

In the present embodiment, as shown in fig. 6, bottom is supported in the wallboard section on rocky bed 5 in the steel cofferdam coxopodite 1 Section is bottom supporting walls plate segment, and the bottom supporting walls plate segment is rectangle and its bottom carries cutting shoe 6, the bottom support Blocked between wallboard section bottom and rocky bed 5 by cutting shoe 6, the thickness of the cutting shoe 6 from top to bottom gradually contracts It is small.

Sealed in the bottom supporting walls plate segment between inside panel 1-1 bottoms and exterior panel 1-2 bottoms by cutting shoe 6 It is stifled；

The plate is laid and sealed between the inside panel 1-1 bottoms and exterior panel 1-2 bottoms of plate by horizontal plugging plate Stifled, the horizontal plugging plate is connected between the inside panel 1-1 bottoms and exterior panel 1-2 bottoms that the plate lays plate.

The structure of the cutting shoe 6 refers to Fig. 6, and exterior panel 1-2 bottom level is less than in the bottom supporting walls plate segment Inside panel 1-1 bottom level, lead between exterior panel 1-2 bottoms and inside panel 1-1 bottoms in the bottom supporting walls plate segment Toe board panel is crossed to connect as one, and in the bottom supporting walls plate segment between exterior panel 1-2 bottoms and inside panel 1-1 bottoms Blocked by the toe board panel.Toe board panel described in the bottom supporting walls plate segment and exterior panel 1-2 bottoms section Section forms the cutting shoe 6.

Exterior panel 1-2 bottom and exterior panel 1-2 in the hanging wall plate segment in the bottom supporting walls plate segment Bottom flush.

Wallboard section in the cofferdam wallboard is divided into the bottom supporting walls plate segment and the hanging wall plate segment two Type, wherein blocked between the bottom supporting walls plate segment bottom and rocky bed 5 by cutting shoe 6, it is described hanging Blocked between wallboard section and rocky bed 5 by the bottom plugging structure.So, by constructed steel cofferdam in water When cushion cap is constructed, by steel cofferdam decentralization in place and by the hanging wall plate segment processing structure and the bottom plugging structure After the completion of constructing, complete tightly to block between institute's construction steel cofferdam and rocky bed 5, directly carried out cofferdam back cover construction , concrete sealing bottom specifically is carried out in constructed steel cofferdam bottom, and the top of concrete sealing bottom layer 11 is formed after back cover Absolute altitude is consistent with the elevation of bottom of the underwater support table.

Before reality is transferred to steel cofferdam 1, the elevation of bottom according to horizontal cushion cap is also needed, judging whether need to be to rock Riverbed 5 is excavated downwards, and when needing to be excavated downwards, is excavated using blasting digging method, formed after excavation The underwater foundation ditch 15 placed for steel cofferdam 1.The bottom supporting walls plate segment bottom is supported in the underwater bottom of foundation ditch 15.

In the present embodiment, width and the thickness of slab all same of multiple first plates 2 in the board plug type processing structure, Multiple first plates 2 are in uniformly laying, and the spacing between two neighboring first plate 2 is no more than the first plate 2 Width；

The width and thickness of slab all same of the special-shaped block and multiple second plates 4 in plate combined type processing structure, Multiple second plates 4 are in uniformly laying, and the spacing between two neighboring second plate 4 is no more than the second plate 4 Width.

For processing and fabricating and installation, easy construction, width and the thickness of slab all same of the plate 4 of the first plate 2 and second, All embedded steel boards are in uniformly laying in each hanging wallboard processing structure.

In the present embodiment, the hanging wall plate segment is low hanging wall plate segment or high hanging wallboard section, is laid in institute The hanging wallboard processing structure stated on low hanging wall plate segment is the board plug type processing structure, is laid in described high hanging The hanging wallboard processing structure on wallboard section is the special-shaped block and plate combined type processing structure；

The type of each hanging wall plate segment is all in accordance with the hanging wall plate segment bottom and the rock immediately below it Vertical distance between stone river bed 5 is judged：With being located at immediately below it at the hanging wall plate segment bottom any position Rocky bed 5 between vertical distance no more than H1max, the hanging wall plate segment is the low hanging wall plate segment； Otherwise, the hanging wall plate segment is the high hanging wallboard section；Wherein, H1max=180cm~220cm.That is, The segmental length of (or below steel cofferdam 1-4) is not more than below the high hanging wallboard section in first plate 2 H1max。

In the present embodiment, H1max=200cm.

Thus, any values of the H1max between 180cm~220cm., can be right according to specific needs during practice of construction H1max value adjusts accordingly.

Vertical distance between rocky bed 5 at any position of the plugging plate bottom and immediately below it is little In H2max；Wherein, H2max=250cm~350cm.That is, in second plate 4 below the plugging plate Segmental length is not more than H2max.

In the present embodiment, H2max=300cm.Thus, any values of the H2max between 250cm~350cm.Actually apply In man-hour, H2max value can be adjusted accordingly according to specific needs.

In the present embodiment, as shown in fig. 7, the embedded steel board is I-steel 14, the web of the I-steel 14 is with being laid The lateral wall of hanging wall plate segment is in parallel laying.

Plate is used as using I-steel 14, support strength can be effectively ensured, and processing and fabricating is easy.The I-steel 14 The edge of a wing of web both sides including web and is symmetrically laid in, the web is fixed between the middle part on two edges of a wing, two The edge of a wing with the perpendicular laying of web.Meanwhile the web of I-steel 14 is arranged to and lays hanging wall plate segment Lateral wall is in parallel laying, and the support steadiness of embedded steel board can so be effectively ensured, simultaneously because the web both sides of I-steel 14 The edge of a wing with the perpendicular laying of web, and the edge of a wing of web both sides is laid in symmetrical, so one geometrically symmetric knot of formation Structure, the stress of web can be transferred directly on two side wing edges so that web is unlikely to deform, is durable in use, and makes whole plate Support is more firm, and two side wing edges carry out equilibrium to web stress, can meet the firm support need for not having to terrain on rocky bed 5 Ask.

As shown in Figure 4 and Figure 5, it is provided with from front to back on the plate laying plate multiple respectively for embedded steel board inserting Pick-and-place components, the pick-and-place components be in vertically to laying.

In the present embodiment, before carrying out steel cofferdam coxopodite assembly in step 1, first using welding equipment in special-shaped block 3 and steel The pick-and-place components are welded and fixed on cofferdam coxopodite 1, and complete the welding of all pick-and-place components on special-shaped block 3 and steel cofferdam coxopodite 1 Journey.

In the present embodiment, each pick-and-place components include lower slot and the position that plate bottom outside is laid positioned at the plate The structure snd size all same of upper slot directly over the lower slot, the upper slot and lower slot and both at character cut in bas-relief Shape plugboard trough 6, the concave shape plugboard trough 6 are fixed on the plate and laid on the lateral wall of plate.

In the present embodiment, the jack in the concave shape plugboard trough 6 is rectangular opening, the length of the rectangular channel for 29cm and Its width is 20cm.

It is simple processing during actual processing, the plate lays the structure and chi of all concave shape plugboard troughs 6 on plate Very little all same.

Upper spacing between slot and the lower slot is 110cm~150cm described in each pick-and-place components.This reality Apply in example, upper spacing between slot and the lower slot is 130cm described in each pick-and-place components., can during actual processing According to specific needs, upper spacing between slot and the lower slot described in each pick-and-place components is adjusted accordingly. The fixation that the embedded steel board can be effectively ensured in upper spacing between slot and the lower slot described in each pick-and-place components is strong Degree and fastness.

In the present embodiment, each cofferdam wallboard is divided into multiple wallboard units from front to back, each wallboard Unit is rectangle.The wallboard unit is bottom supporting walls Slab element or hanging wall Slab element, and the bottom supports wallboard list Member is bottom supporting walls plate segment, the hanging wall Slab element be bottom complete full hanging wall Slab element in vacant state or Base section is in the part hanging wall Slab element of vacant state, and the full hanging wall Slab element is the hanging wall plate segment, The wallboard section that bottom is in vacant state in the part hanging wall Slab element is the hanging wall plate segment.

In the present embodiment, there is hanging phenomenon in the right lateral side drift angle of institute's construction steel cofferdam 1, cause close to navigation channel and the drift angle Hanging phenomenon be present in the bottom of steel cofferdam 1, on the outside of cofferdam leak stopping can not implement, brought to the construction of cofferdam bottom concrete greatly tired Whether difficulty, the back cover for directly affecting steel cofferdam 1 succeed.If deepen the underwater Blasting Excavation depth of foundation ditch 15, the total height of steel cofferdam 1 Also need accordingly to increase, can so greatly increase cost, while construction period is longer.And the hanging wallboard processing structure is used to enter , can be different according to flying height in hanging part while need not deepen underwater 15 Blasting Excavation depth of foundation ditch after row processing Alignment processing is carried out, realizes the tight closure between hanging wall plate segment and rocky bed 5.

In the present embodiment, using the hanging wallboard processing structure, (specifically board plug type processing structure or special-shaped block is with inserting Plate combined type processing structure) topography variation of rocky bed 5 can be fully adapted to, carried out using sandbag 9 and anchor bar of waterproof plate in tunnels underwater Closure.

Before practice of construction, measurement equipment pair is first swept using conventional riverbed, according to carrying out sweeping survey, and root to rocky bed 5 Survey situation is swept according to riverbed, the flying height at the hanging wall plate segment any position is determined, the hanging wallboard section The vertical distance between rocky bed 5 of the flying height for the opening position and immediately below it at section any position；To steel When cofferdam 1 is processed, the basil of the hanging wall plate segment bottom is changed to the straight angle, determined whether according to actual measurement flying height The plugging plate is set, and the size of the plugging plate is determined according to actual landform.

Embedded steel board in the hanging wallboard processing structure mainly can well adapt to topography variation, and single I-steel is inserted Plate can contact with rocky bed 5, play supporting and retaining system leakproof effect.In the present embodiment, embedded steel board uses I25b I-steel, length 3m ~6m, the lateral wall of I-steel web and steel cofferdam 1 are placed in parallel.Jack size in the plugboard trough is 29 × 20cm, institute State after plugboard trough uses thickness as 20mm steel plate bendings and be welded with Double-Wall Steel Boxed Cofferdam lateral wall, every I-steel 14 is perpendicular Nogata sets up 2 jacks up and down, and jack spacing is 1.3m.Spacing between the two neighboring embedded steel board is 40cm, phase Clear distance between adjacent two embedded steel boards is 15cm.During practice of construction, the two neighboring steel can be inserted according to specific needs Clear distance between plate adjusts accordingly.

In the present embodiment, as shown in figure 1, the cross section of the steel cofferdam 1-4 is rectangle.The four of the steel cofferdam 1-4 Skewed horizontal load part 12 is provided with individual drift angle, midfoot support part is provided between the front side wall and rear wall of the steel cofferdam 1 13.The skewed horizontal load part 12 and midfoot support part 13 are in horizontal layout.

When carrying out steel cofferdam coxopodite in the present embodiment, in step 103 and sinking, by the inside panel 1- of steel cofferdam coxopodite 1 Water filling in cavity between 1 bottom and exterior panel 1-2, steel cofferdam coxopodite 1 is steadily sunk；

When synchronously sinking to hanging all cofferdam sections sent cofferdam section and be disposed below in step 104, lead to The water filling into the cavity hung between the inside panel 1-1 bottoms for sending cofferdam section and exterior panel 1-2 is crossed steadily to be sunk.

When the sinking of steel cofferdam coxopodite is carried out in the present embodiment, in step 103, sink down into the top of steel cofferdam coxopodite 1 and expose water Untill the height in face is σ；Synchronously carried out down in step 104 to hanging all cofferdam sections sent cofferdam section and be disposed below When heavy, sink down into untill hanging the height for sending the top of cofferdam section to expose the surface as σ.Wherein, σ=2m~3m.

It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention Any simple modification, change and the equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention In the protection domain of art scheme.

Claims (10)

1. A kind of 1. deep water foundation pile foundation construction process, it is characterised in that：Constructed deep water foundation pile foundation includes more to being held in water The drilled pile (17) that platform is supported, the underwater support table are to use being held for armored concrete for steel cofferdam (1-4) construction molding Platform；The steel cofferdam (1-4) is supported on rocky bed (5), the drilled pile (17) be below the horizontal cushion cap and In being in vertically to the reinforced concrete pile of laying, the drilled pile (17) on the solid rock (18) in rocky bed (5)；

   When being constructed to constructed deep water foundation pile foundation, process is as follows：

   Step 1: cofferdam construction：According to conventional sinking of cofferdam construction method, steel cofferdam (1-4) is from top to bottom sunk down into described At the construction location of underwater support table, and steel cofferdam (1-4) is set to be supported on rocky bed (5)；

   Step 2: steel pile casting is transferred：According to conventional steel pile casting pay-off method, to the steel pile casting (7- used in construction drill stake (17) 1) transferred；

   The quantity of installed steel pile casting (7-1) is identical with the quantity of drilled pile (17), and multiple steel pile castings (7-1) are respectively positioned on steel In cofferdam (1-4), the installation positions of multiple steel pile castings (7-1) installation position one with the more drilled piles (17) respectively One correspondence；

   Step 3: cofferdam back cover is constructed：Concrete sealing bottom, envelope are carried out to steel cofferdam (1-4) bottom to sink in step 1 in place The elevation of top that concrete sealing bottom layer (16) is formed behind bottom is consistent with the elevation of bottom of the underwater support table；

   Step 4: drilled pile construction：The more drilled piles (17) are constructed respectively, more drilled pile (17) are applied Work method all same；

   When being constructed to any drilled pile (17), comprise the following steps：

   Step 401, draw hole drill and take：It is more from top to bottom being drilled through on solid rock (18) residing for current institute's construction drill stake (17) Individual to draw hole (20), the hole (20) of drawing is in vertically to laying and its quantity is 8~10；Draw hole (20) described in multiple to be respectively positioned on In the design stake holes (19) of current institute's construction drill stake (17), multiple structure snd size all sames for drawing hole (20)；It is multiple It is described to draw that hole (20) includes multiple along the circumferential direction uniformly lay lateral opening and one is located at multiple lateral opening middle insides Mesopore, the mesopore are located on the central axis of current institute's construction drill stake (17)；

   Multiple holes (20) of drawing are respectively positioned in the steel pile casting (7-1) for current institute's construction drill stake (17) of constructing, the steel Casing (5) is laid with design stake holes (19) in coaxial；

   Step 402, drilled pile construction：Routinely in water drilled pile construction method, to current institute's construction drill stake (17) carry out Construction；

   Step 403, step 401 is repeated several times to step 402, until completing the work progress of all drilled piles (17).
2. 2. according to a kind of deep water foundation pile foundation construction process described in claim 1, it is characterised in that：The drilled pile (17) A diameter of Φ 2m~Φ 3m, a diameter of Φ 80mm~Φ 120mm in hole (20) are drawn described in step 401.
3. 3. according to a kind of deep water foundation pile foundation construction process described in claim 1 or 2, it is characterised in that：Described in step 401 Draw the bottom surface of the bottom surface in hole (20) higher than design stake holes (19), the bottom surface of the bottom surface for drawing hole (20) and design stake holes (19) it Between vertical distance be 15cm~25cm.
4. 4. according to a kind of deep water foundation pile foundation construction process described in claim 1 or 2, it is characterised in that：Described in step 401 It is using the vertical drilling for the rig drilling shaping being laid on drilling platform, the drilling platform and drilling to draw hole (20) It is the empty brill section that the rig is in idling conditions between solid rock (18) residing for stake, the empty section of boring is using with pipe The section of drilling, the empty internal diameter for boring the sleeve pipe that followed up in section are more than the diameter for drawing hole (20)；

   The drilling platform is to be erected in step 4 before drilled pile construction on the steel cofferdam (1-4) to sink in step 1 in place Platform, the drilling platform is supported at the top of steel cofferdam (1-4)；

   Multiple trephination all sames for drawing hole (20) in step 401, and described draw hole (20) to multiple to rear by elder generation Drilled through respectively；

   When drawing hole (20) to any one using the rig and drilling through, empty brill is from top to bottom first carried out, until the brill The drill bit of hole equipment is contacted with solid rock (18), and sky is crept into during boring using conventional pipe-following drilling method, the brill Hole equipment is in idling conditions；After the drill bit of the rig contacts with solid rock (18), using the rig From top to bottom crept into solid rock (18), until completing the boring procedure for drawing hole (20)；

   Drilled pile construction is carried out in step 402, current institute's construction drill stake (17) is constructed using the drilling platform.
5. 5. according to a kind of deep water foundation pile foundation construction process described in claim 4, it is characterised in that：Empty bore is followed up in section The internal diameter ratio of sleeve pipe draws the big 40mm~100mm of diameter in hole (20).
6. 6. according to a kind of deep water foundation pile foundation construction process described in claim 1 or 2, it is characterised in that：Steel protects in step 2 Before carrying out drilled pile construction after the completion of cylinder decentralization and in step 4, taken on the steel cofferdam (1-4) that sinks in step 1 in place If drilling platform；

   The drilling platform includes the lower support platform being supported on steel cofferdam (1-4) and is supported in the lower support platform Upper support platform；The more drilled piles (17) are laid in multiple rows of multiple row；In the lower support platform and the upper support platform Multiple through holes passed for steel pile casting (7-1) are provided with, multiple steel pile castings (17) are connected as one by casing attachment structure Body, the casing attachment structure include multiple lateral connection beams (21) being laid in same level, the casing connection knot The multiple rows of multiple row of all lateral connection beams (21) point in structure is laid, and each lateral connection beam (21) is along steel cofferdam (1-4) Length direction lay；Multiple steel pile castings (17) are laid in multiple rows of multiple row, often arrange the steel pile casting (17) including multiple The steel pile casting (17) laid from front to back along the length direction of steel cofferdam (1-4), often arrange two neighboring in the steel pile casting (17) It is attached between the top of the steel pile casting (17) by a lateral connection beam (21), described in the row positioned at the leftmost side Steel pile casting (17) and in a row steel pile casting (17) of the rightmost side each steel pile casting (17) and steel cofferdam (1-4) it Between be attached by a lateral connection beam (21)；The lower support platform is supported in the casing attachment structure, institute Stating lower support platform includes the longeron (22) that multiple tracks is laid in same level, longeron (22) and lateral connection beam described in per pass (21) perpendicular laying, longeron (22) described in per pass are supported on the row lateral connection beam (21)；The upper support Platform includes multiple tracks in the parallel transverse distribution beam (23) laid and be respectively positioned in same level, transverse distribution beam described in per pass (23) it is supported on longeron described in multiple tracks (22)；The longeron (22), lateral connection beam (21) and transverse distribution beam (23) are equal In horizontal layout；

   The multiple steel pile castings (7-1) transferred in step 3 in place are connected as one by the casing attachment structure.
7. 7. according to a kind of deep water foundation pile foundation construction process described in claim 1 or 2, it is characterised in that：Steel cofferdam (the 1- 4) it is the cube steel jacket box constructed to underwater support table, the cross section of the cube steel jacket box is rectangle, described vertical Cube steel jacket box is divided into multiple in vertically to the cofferdam section of laying from the bottom to top, is located at bottommost in the cube steel jacket box The cofferdam section be steel cofferdam coxopodite (1)；

   When step 1 carries out cofferdam construction, comprise the following steps：

   Step 101, steel cofferdam coxopodite are assembled：Four cofferdam wallboards of steel cofferdam coxopodite (1) will be formed using welding equipment Equal assembly is integrated, and obtains the steel cofferdam coxopodite (1) of assembled shaping；

   Step 102, the transfer of steel cofferdam coxopodite：Steel cofferdam coxopodite described in step 101 (1) is moved in advance using transfer device At the construction location for the steel cofferdam (1-4) measured；

   Step 103, steel cofferdam coxopodite sink：The steel cofferdam coxopodite (1) moved into place in step 102 is sunk；

   Step 104, the installation of upper cofferdam section and sinking：Save in the cofferdam for first being installed a upper need using hanging device Section is hung on the cofferdam section delivered to and currently sunk in place, and will be hung using welding equipment and sent cofferdam section sealing welding On the cofferdam section currently to have sunk in place, then to hanging all cofferdam sections sent cofferdam section and be disposed below Synchronously sunk, complete installation and the sinking watching of upper cofferdam section；

   Step 105, one or many repeat steps 104, until completing in steel cofferdam (1-4) above steel cofferdam coxopodite (1) All cofferdam sections installation and sinking watching, now steel cofferdam (1-4) sink down into design attitude, complete steel cofferdam (1-4) Sinking watching.
8. 8. according to a kind of deep water foundation pile foundation construction process described in claim 7, it is characterised in that：The steel cofferdam coxopodite (1) it is supported on rocky bed on (5), the steel cofferdam coxopodite (1) is assembled by four cofferdam wallboards, four cofferdam Wallboard is in vertically to laying and its structure all same, the height all same of four cofferdam wallboards and its bottom is equal Together；

   The hanging wallboard processing structure of the hanging wallboard section bottom of the steel cofferdam coxopodite (1), the hanging wallboard section is described The hanging wallboard section in bottom in the wallboard of cofferdam, described in the quantity and steel cofferdam coxopodite (1) of the hanging wallboard processing structure The quantity of hanging wall plate segment is identical；

   Each hanging wallboard Duan Jun is divided into multiple hanging wall plate segments from front to back, and the hanging wall plate segment is rectangle； Each hanging wallboard processing structure is laid hanging from front to back including multiple contour lines along the hanging wallboard section Wallboard section processing structure, each hanging wall plate segment processing structure are laid on a hanging wall plate segment；

   The hanging wall plate segment processing structure is board plug type processing structure or special-shaped block and plate combined type processing structure；It is described Board plug type processing structure includes multiple the first plates (2) for being laid in the hanging wall plate segment bottom outside from front to back, more Individual first plate (2) is in be inserted to rocky bed (5) to laying, the bottom of each first plate (2) vertically On；The special-shaped block and plate combined type processing structure include being connected to the special-shaped block (3) of the hanging wall plate segment bottom and Multiple the second plates (4) being laid in from front to back on the outside of special-shaped block (3), multiple second plates (4) are in vertically to cloth If the bottom of each second plate (4) is inserted to rocky bed (5), the special-shaped block (3) is described outstanding to be laid in Immediately below empty wallboard section and it is in be connected hanging wallboard section with it to the plugging plate of laying, the lateral wall of the plugging plate vertically The lateral wall flush of section, the cross-sectional structure and size of the plugging plate are connected the cross section of hanging wall plate segment with it Structure snd size are identical；First plate (2) and the second plate (4) are embedded steel board, and the embedded steel board is elongate steel plate；

   All embedded steel boards of each hanging wallboard processing structure are respectively positioned on same vertical plane, each embedded steel board with Its hanging wall plate segment laid is in parallel laying, and all embedded steel boards in each hanging wallboard processing structure form Outside-supporting barrier, the outside-supporting barrier are in vertically to laying；Bottom envelope is provided with the inside of the outside-supporting barrier Bridging structure, the bottom plugging structure are the plugging structure blocked to the outside-supporting barrier, the bottom closure knot Structure is located between steel cofferdam (1-4) and rocky bed (5)；

   When steel cofferdam coxopodite assembly is carried out in step 101, all special-shaped blocks (3) that need to be connected are weldingly fixed on steel cofferdam bottom (1) bottom is saved, obtains the steel cofferdam coxopodite (1) of assembled shaping and bottom belt special-shaped block (3)；

   After institute's construction steel cofferdam (1-4) sinks in place in step 105, also need that all steel of installation will be needed on steel cofferdam coxopodite (1) Plate is inserted into sinking in place and on the steel cofferdam coxopodite (1) of bottom belt special-shaped block (3), and each embedded steel board bottom is supported In the outside-supporting barrier on rocky bed (5), obtaining construction molding；Construct institute on the inside of the outside-supporting barrier again Bottom plugging structure is stated, is blocked by outside-supporting barrier described in the bottom plugging structure.
9. 9. according to a kind of deep water foundation pile foundation construction process described in claim 7, it is characterised in that：The cofferdam wallboard midsole The wallboard section that portion is supported on rocky bed (5) is bottom supporting walls plate segment, the bottom of the bottom supporting walls plate segment With cutting shoe (6), blocked between the bottom supporting walls plate segment bottom and rocky bed (5) by cutting shoe (6), it is described The thickness of cutting shoe (6) is from top to bottom gradually reduced；

   The hanging wall plate segment is low hanging wall plate segment or high hanging wallboard section, is laid in the low hanging wall plate segment On the hanging wallboard processing structure be the board plug type processing structure, be laid in described high vacantly described on wallboard section Hanging wallboard processing structure is the special-shaped block and plate combined type processing structure；

   The type of each hanging wall plate segment is all in accordance with the hanging wall plate segment bottom and the rock river immediately below it Vertical distance between bed (5) is judged：With being located at immediately below it at the hanging wall plate segment bottom any position For vertical distance between rocky bed (5) no more than H1max, the hanging wall plate segment is the low hanging wall plate segment； Otherwise, the hanging wall plate segment is the high hanging wallboard section；Wherein, H1max=180cm~220cm；

   The vertical distance between rocky bed (5) at any position of the plugging plate bottom and immediately below it no more than H2max；Wherein, H2max=250cm~350cm.
10. 10. according to a kind of deep water foundation pile foundation construction process described in claim 7, it is characterised in that：The plugging plate and outer The hanging wall plate segment that side is laid with the first plate (2) is that plate lays plate, the plate lay on plate by it is preceding extremely Multiple pick-and-place components inserted respectively for the embedded steel board are provided with afterwards, and the pick-and-place components are in vertically to laying；Each pick-and-place components Include positioned at the plate lay plate bottom outside lower slot and the upper slot directly over the lower slot, it is described on The structure snd size all same of slot and lower slot and both at concave shape plugboard trough (7), the concave shape plugboard trough (7) is solid The plate is scheduled on to lay on the lateral wall of plate；

    The bottom plugging structure includes sandbag plugging structure and the splash guard (9) mated formation on the inside of the sandbag plugging structure； The sandbag plugging structure includes the vertical block wall that multiple gaps between the two neighboring embedded steel board are blocked (8), the vertical block wall (8) is supported in the plate and laid between plate and rocky bed (5), in the outside-supporting barrier Blocked between two embedded steel boards of arbitrary neighborhood by a vertical block wall (8)；Splash guard (9) bottom Portion is laid on the rocky bed (5) for laying below plate positioned at the plate, and the plate is fixed at the top of the splash guard (9) Lay on plate；The vertical block wall (8) is the block wall being piled into from the bottom to top by multiple sandbags (10).