The construction method of diaphram wall in a kind of tunnel
Technical field
The present invention relates to a kind of construction methods of diaphram wall in tunnel.
Background technique
In traditional Metro method construction, when meeting level of ground water more than floor structure, generally to set dewatering well
Pump drainage water is carried out to reduce water level and fender post adds curtain water stop, to complete earth excavation operation.Conventional measures of preventing water
There are deep hole grouting, rotary churning pile, interlocking pile and diaphram wall etc., but first three measures of preventing water, there are limitation, water-stagnating effect is difficult
To guarantee, therefore diaphram wall becomes a kind of selection of underground engineering sealing.The construction of diaphram wall is usually on ground at present
The problems such as face carries out, and place range is big, limited in order to adapt to construction space in tunnel, and stable structure is adversely affected, it is special into
The improvement and invention of construction method of underground continuous wall in row tunnel.
Summary of the invention
The object of the present invention is to provide a kind of construction methods of diaphram wall in tunnel, to solve traditional construction method
When construction by construction space in tunnel limited and tunnel structure stability is adversely affected and cause can not normal construction
The technical issues of.
To achieve the above object, the present invention adopts the following technical scheme that.
The construction method of diaphram wall in a kind of tunnel, including steps are as follows.
Step 1: the construction of wall is led.
Step 2: grooving.
Step 3: being segmented diaphragm wall to be onstructed, forms several diaphragm wall sections to be onstructed;And it is several continuous
Steel reinforcement cage in wall section is divided into two batches construction.
Step 4: the construction of first framework of steel reinforcement is carried out in slot: interval construction is carried out to first framework of steel reinforcement;Its
In, each framework of steel reinforcement both ends are respectively connected with I-steel.
Step 5: it is cleaned with water using I-steel wall of the brush wall device to diaphram wall;Wherein, which includes brush
Wall device shell, clump weight, steel brush and built-in spring;The brush wall device shell includes being enclosed by top plate and bottom plate, front side board and back side panel
Cylindrical body made of conjunction, the length and ground-connecting-wall of the brush wall device shell are adapted at groove width;The generally square of the clump weight
Shape stereochemical structure, and be packed in brush wall device shell;Wherein, between being equipped between the left side of clump weight and brush wall device shell left end
Away from equipped with spacing between the right side and brush wall device shell left side of clump weight;There are two the steel brushes, is separately positioned on counterweight
At the left and right sides of block, close brush wall device outer casing end position, and each steel brush is located at the top plate and bottom plate of brush wall device shell
Between;The built-in spring has two groups, is arranged in the left and right sides of clump weight;Wherein, the corresponding pressure of spring built in every group is set
Between clump weight and the steel brush of corresponding side.
Step 6: slurry is changed at clear bottom.
Step 7: the construction of second batch framework of steel reinforcement is carried out in slot: between each framework of steel reinforcement of second batch construction is corresponding
Between the two neighboring framework of steel reinforcement that first construction is set;Each framework of steel reinforcement is segmented, several reinforcing bars are formed
Cage, and steel reinforcement cage is processed respectively, transported and lifted;When lifting, steel reinforcement cage is successively risen and hangs in slot, adjacent steel reinforcement cage is in slot
Splice decentralization at mouthful;The hangs muscle for reinforcing bar cage hoisting is welded on the steel reinforcement cage.
Step 8: the installation of lock pipe and conduit;Conduit is mounted in framework of steel reinforcement, to carry out concreting.
Step 9: it carries out secondary clear slot: slot bottom sediment being sucked out using immersible pump.
Step 10: underwater gliders up underwater gliders: are carried out from slot bottom using conduit.
Step 11: lock pipe is pulled out.
Preferably, in step 2 when grooving, the earthwork dug out is initially charged in storage device, then is packed into first by storage device
Transport completes unearthed work to vertical shaft on fork truck;Wherein, storage device is box shaped, is mounted on the first fork truck front part sides
On first pallet fork;The storage device includes bottom panel, two side panels, end panel and front console;The bottom of the bottom panel
Portion two sides, corresponding the first pallet fork of two sides position at be respectively equipped with connector and hydraulic device, and the connector setting of every side
At bottom panel front position, the hydraulic device of every side is at bottom panel terminal position;The storage device and first
It is articulated and connected between pallet fork by connector;The front console, which is from bottom to top gradually inclined outwardly, is connected to two side panels
Between front end.
Preferably, the connector is hinge or is pivot pin.
Preferably, in step 2 when grooving, the earthwork dug out is initially charged in storage device, then is packed into first by storage device
Transport completes unearthed work to vertical shaft on fork truck;Wherein, storage device is box shaped, is mounted on the first fork truck front part sides
On first pallet fork;The storage device includes bottom panel, two side panels, end panel and front console;The bottom of the bottom panel
Portion two sides, corresponding the first pallet fork of two sides position at be respectively equipped with connector and hydraulic device, and the connector setting of every side
At bottom panel front position, the hydraulic device of every side is at bottom panel terminal position;The storage device and first
It is articulated and connected between pallet fork by connector;The front console, which is from bottom to top gradually inclined outwardly, is connected to two side panels
Between front end.
Preferably, the connector is hinge or is pivot pin.
Preferably, in step 7, the height of every section of steel reinforcement cage is 2.5m~3.5m;
Preferably, the transport of steel reinforcement cage is carried out using the second fork truck in step 7: two bars being passed through steel reinforcement cage first, and will
Steel reinforcement cage is as between the second pallet fork of the second fork truck front part sides;The both ends of bar are ridden upon to the second pallet fork of two sides respectively
On, the second pallet fork is adjacent to steel reinforcement cage, recycles bolt that bar and the second pallet fork are fixed, it is ensured that steel reinforcement cage was transporting
Stabilization in journey.
Preferably, when steel reinforcement cage splices paragraph by paragraph, connect between neighbouring steel reinforcement cage using using straight screw sleeve machinery
It connects.
Preferably, in the framework of steel reinforcement construction of step 7, the steel reinforcement cage at T shape interface position, which is divided into two parts, to be applied
Work includes the construction of transverse steel cage unit and the construction of longitudinal reinforcement cage unit: longitudinal reinforcement cage unit of first constructing, and
Channel steel interface is set on longitudinal reinforcement cage unit, at the position of corresponding transverse steel cage unit;Wherein, channel steel interface vertically leads to
The long side that longitudinal reinforcement cage unit is set, and three face weld all arounds are used between longitudinal reinforcement cage unit;Then construction is lateral
Steel reinforcement cage unit, and be arranged in the end that transverse steel cage unit connect with longitudinal reinforcement cage unit side and mutually fitted with channel steel interface
The connector answered;It in transverse steel cage unit lifting, is docked with the channel steel interface for the longitudinal reinforcement cage unit first constructed, thus real
The connection of steel reinforcement cage in existing tunnel at diaphram wall T shape interface position.
Preferably, fluted, channel steel interface is set on longitudinal reinforcement cage unit, at the position of corresponding channel-section steel interface connection
Corresponding welding is in a groove;The groove is bent inwards shape by the reinforcing bar of the longitudinal reinforcement cage unit side in corresponding position
At.
Compared with prior art the invention has the characteristics that and beneficial effect.
1, when constructing in tunnel to diaphram wall, since working space is narrow, conventional construction of guide wall method
Can not normal construction, and when being constructed in first branch molding tunnel, the stability in tunnel can be had some impact on;
And framework of steel reinforcement is subjected to layer and section construction in construction method of the invention, and using the operation transport of small-sized second fork truck, behaviour
Make flexibly, it is easy for construction, the technical issues of limitation when solving traditional construction method construction by construction space in tunnel.
2, the present invention installs bar in the fork truck arm of the second fork truck, and steel reinforcement cage is hung in the second of two sides using bar
Between pallet fork, the size of steel reinforcement cage and the second fork truck is all smaller and steel reinforcement cage is arranged between two second pallet forks, does not account for separately
Space solves the problems, such as that existing diaphram wall steel reinforcement cage transportation resources can not use in tunnel limited operability space.
3, the present invention makes special storage device, which can be mounted on according to the execution conditions at scene
On the first small-sized fork truck, the storage work of the earthwork can be completed, the simple, flexible operation and safe and practical excellent with structure
Point, and the device required place in construction is smaller, storage work suitable for the diaphram wall earthwork in tunnel, solves
The technical issues of traditional construction method is limited when constructing by construction space in tunnel.
4, the present invention due in tunnel working space it is limited, in tunnel carry out construction of diaphragm wall during, excavate
The earthwork be initially charged with storage device and stored, storage device shape is that cuboid side is changed to arc-shaped, in storage device
Bottom is equipped with hinge or pivot pin at the position of front end, convenient for being attached with the pallet fork of fork truck, completes the receipts of the earthwork
It receives work, hydraulic device is installed between the end and fork truck of storage device, the dumpable earthwork, the storage device in the present invention has
It is easy to operate, safe and practical and be suitable for tunnel in the diaphram wall earthwork storage work the advantages of.
5, the present invention is supported when wall is led in construction on tunnel top, it is ensured that the safety constructed in tunnel solves
Tunnel structure stability be adversely affected and cause can not normal construction the technical issues of.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of the framework of steel reinforcement at T shape interface position of the invention.
Fig. 2 is the structural schematic diagram of longitudinal reinforcement cage unit of the invention.
Fig. 3 is the structural schematic diagram of transverse steel cage unit of the invention.
Fig. 4 is positive structure schematic when brush wall device cleans I-steel wall with water in the present invention.
Fig. 5 is planar structure schematic diagram when brush wall device cleans I-steel wall with water in the present invention.
Fig. 6 is neighbouring two sections of steel reinforcement cage attachment structure schematic diagrams in the present invention.
Fig. 7 is that storage device is mounted on the structural schematic diagram on the first fork truck in the present invention.
Fig. 8 is the structural schematic diagram of storage device in the present invention.
Fig. 9 is the planar structure schematic diagram of the second forklift transport steel reinforcement cage in the present invention.
Figure 10 is the side structure schematic diagram of the second forklift transport steel reinforcement cage in the present invention.
Appended drawing reference: before 1- brush wall device, 1.1- brush wall device shell, 1.1.1- top plate, 1.1.2- bottom plate, 1.1.3-
Side plate, 1.1.4- back side panel, 1.2- clump weight, 1.3- steel brush, spring, 2- steel reinforcement cage, the longitudinal direction 2.1- steel built in 1.4-
Muscle cage unit, 2.2- transverse steel cage unit, 3- hangs muscle, 4- storage device, 4.1- bottom panel, 4.2- side panel,
4.3- end panel, 4.4- front console, the first fork truck of 5-, the first pallet fork of 6-, 7- connector, the second fork truck of 8-, 9-
Bar, the second pallet fork of 10-, 11- bolt, 12- channel steel interface, 13- connector, 14- groove, 15- straight screw sleeve.
Specific embodiment
The construction method of diaphram wall in this tunnel;Including steps are as follows.
Step 1: the construction of wall is led;Construction of guide wall process in tunnel are as follows: tunnel upper support installation → surveying setting-out → broken
Wall reinforcing bar → formwork → casting is led except branch structure at the beginning of bottom in tunnel → excavation groove → binding to lead wall concrete → demoulding and set
Set stull;When carrying out construction of guide wall in tunnel, since underground activities space is limited, is performed using hand excavation and lead wall, lead wall
Zhi Jinhang at the beginning of tunnel need to be abolished using pneumatic pick etc. when construction, the stability in tunnel will receive certain influence, using I22a work
Word steel or 36 lead screw of Φ are supported support on tunnel top.
Step 2: grooving: carrying out grooving using small-sized hydraulic chute forming machine, and mechanical grab bucket center is equipped with drill bit, increases
The shoveling ability of grab bucket, the earthwork dug out are initially charged in storage device 4, then by storage device 4 be packed into the first fork truck 5 on transport to
Vertical shaft completes unearthed work;Wherein, storage device 4 is box shaped, is mounted on the first pallet fork 6 of 5 front part sides of the first fork truck
On;The storage device 4 includes 4.1, two side panels 4.2 of bottom panel, end panel 4.3 and front console 4.4;The bottom panel
Connector 7 and hydraulic device, and the company of every side are respectively equipped at 4.1 two sides of the bottom, the position of correspondence the first pallet fork of two sides 6
Fitting 7 is positioned close at 4.1 front position of bottom panel, and the hydraulic device of every side is at 4.1 terminal position of bottom panel;It is described
It is articulated and connected between storage device 4 and the first pallet fork 6 by connector 7;The front console 4.4 from bottom to top gradually leans outward
Tiltedly it is connected between the front end of two side panels 4.2;The connector 7 is hinge or is pivot pin.
Step 3: being segmented diaphragm wall to be onstructed, forms several diaphragm wall sections to be onstructed;And it is several continuous
Steel reinforcement cage in wall section is divided into two batches construction.
Step 4: the construction of first framework of steel reinforcement is carried out in slot: interval construction is carried out to first framework of steel reinforcement;Its
In, each framework of steel reinforcement is divided into several steel reinforcement cages 2, and each 2 both ends of steel reinforcement cage are respectively connected with I-steel;When construction, steel reinforcement cage 2 according to
Secondary production, transport and lifting;When construction, the I-steel at 2 both ends of steel reinforcement cage is docked using notch, and side welding steel plate uses and I-steel
The Q235 steel of same type, side welding steel board size be 400 × 400 × 10mm, welding rod use E43 series welding rod, weld size be 8 ×
8mm;Steel reinforcement cage 2, which successively rises, when lifting hangs in slot, splices decentralization paragraph by paragraph in notch;U is welded on I-steel and on steel reinforcement cage 2
The hangs muscle 3 of shape is for transporting.
Step 5: it is cleaned with water using I-steel wall of the brush wall device 1 to diaphram wall;Wherein, which includes
Brush wall device shell 1.1, clump weight 1.2, steel brush 1.3 and built-in spring 1.4;The brush wall device shell 1.1 includes by top plate
1.1.1, cylindrical body made of bottom plate 1.1.2, front side board 1.1.3 and back side panel 1.1.4 are enclosed, the length of the brush wall device shell 1.1
Degree and ground-connecting-wall are adapted at groove width;The generally rectangle stereochemical structure of the clump weight 1.2, and it is packed in brush wall device shell
In 1.1;Wherein, spacing, the right side of clump weight 1.2 are equipped between 1.1 left end of the left side of clump weight 1.2 and brush wall device shell
Spacing is equipped between 1.1 left side of brush wall device shell;There are two the steel brushes 1.3, is separately positioned on the left and right of clump weight 1.2
At two sides, close 1.1 end position of brush wall device shell, and each steel brush 1.3 is located at the top plate 1.1.1 of brush wall device shell 1.1
Between bottom plate 1.1.2;The built-in spring 1.4 has two groups, is arranged in the left and right sides of clump weight 1.2, makes brush wall device 1
Has retractility;Wherein, the correspondence of spring 1.4 is pressed between clump weight 1.2 and the steel brush 1.3 of corresponding side built in every group;When
Brush wall device 1 is put into when moving up and down in slot, and steel brush 1.3 is combined closely with I-steel wall, clears up the sundries on I-steel wall.
Step 6: slurry is changed at clear bottom.
Step 7: the construction of second batch framework of steel reinforcement is carried out in slot: between each framework of steel reinforcement of second batch construction is corresponding
Between the two neighboring framework of steel reinforcement that first construction is set;Each framework of steel reinforcement is segmented, several reinforcing bars are formed
Cage 2, and steel reinforcement cage 2 is processed respectively, transported and lifted;When lifting, steel reinforcement cage 2 is successively risen and hangs in slot, adjacent steel reinforcement cage 2
Splice decentralization at notch;The hangs muscle 3 lifted for steel reinforcement cage 2 is welded on the steel reinforcement cage 2.
Step 8: the installation of lock pipe and conduit;Conduit is mounted in framework of steel reinforcement 2, to carry out concreting.
Step 9: it carries out secondary clear slot: slot bottom sediment being sucked out using immersible pump.
Step 10: underwater gliders up underwater gliders: are carried out from slot bottom using conduit.
Step 11: lock pipe is pulled out.
In the present embodiment, in step 7, the height of every section of steel reinforcement cage 2 is 2.5m~3.5m;
In the present embodiment, the transport of steel reinforcement cage 2 is carried out using the second fork truck 8 in step 7: two bars 9 being passed through reinforcing bar first
Cage 2, and by steel reinforcement cage 2 as between the second pallet fork 10 of 8 front part sides of the second fork truck;The both ends of bar 9 are ridden upon respectively
On second pallet fork 10 of two sides, the second pallet fork 10 is adjacent to steel reinforcement cage 2, recycle bolt 11 by bar 9 and the second pallet fork 10 into
Row is fixed, it is ensured that the stabilization of steel reinforcement cage 2 during transportation.
In the present embodiment, when steel reinforcement cage 2 splices paragraph by paragraph, using using straight screw sleeve between neighbouring steel reinforcement cage 2
15 mechanical connections.
In the present embodiment, in the framework of steel reinforcement construction of step 7, the steel reinforcement cage 2 at T shape interface position is divided into two
Part is constructed, and includes the construction of transverse steel cage unit 2.2 and the construction of longitudinal reinforcement cage unit 2.1: longitudinal steel of first constructing
Muscle cage unit 2.1, and channel steel interface is set on longitudinal reinforcement cage unit 2.1, at the position of corresponding transverse steel cage unit 2.2
12;Wherein, the vertically elongated side that longitudinal reinforcement cage unit 2.1 is set of channel steel interface 12, and with longitudinal reinforcement cage unit
2.1 three face weld all arounds are used between;Then construction transverse steel cage unit 2.2, and in transverse steel cage unit 2.2 and longitudinal reinforcement
Cage unit 2.1 connects the connector 13 that the end setting of side is adapted with channel steel interface 12;It is lifted in transverse steel cage unit 2.2
When, it is docked with the channel steel interface 12 for the longitudinal reinforcement cage unit 2.1 first constructed, to realize that diaphram wall T shape connects in tunnel
The connection of steel reinforcement cage 2 at mouth position.
In the present embodiment, it is arranged on longitudinal reinforcement cage unit 2.1, at the position that corresponding channel-section steel interface 12 connects fluted
14, the corresponding welding of channel steel interface 12 is within grooves 14;The groove 14 is by the reinforcing bar of 2.1 side of longitudinal reinforcement cage unit right
It answers and bends inwards to be formed at position.
Above-described embodiment is not the exhaustion of specific embodiment, can also there is other embodiments, and above-described embodiment purpose exists
In illustrating the present invention, the protection scope being not intended to limit the present invention, all applications from simple change of the present invention all fall within this
In the protection scope of invention.